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Why Does Water Boil in a Vacuum? -- Vacuum Boiler

Water boiling in a vacuum is a fascinating phenomenon that demonstrates fundamental principles of thermodynamics and fluid dynamics. In this article, we will explore why water boils in a vacuum and how this principle is applied in vacuum boilers, a critical technology in various industrial applications.

Understanding Boiling Point

To understand why water boils in a vacuum, we must first grasp the concept of boiling point. The boiling point of water is the temperature at which its vapor pressure equals the atmospheric pressure surrounding it. At sea level, where atmospheric pressure is approximately 101.3 kPa (14.7 psi), water boils at 100°C (212°F).

The Role of Atmospheric Pressure

Atmospheric pressure plays a significant role in determining the boiling point of water. When atmospheric pressure is reduced, such as in a vacuum, the boiling point of water decreases. This is because the vapor pressure needed for water molecules to escape into the vapor phase is achieved at a lower temperature.

Boiling in a Vacuum

In a vacuum, atmospheric pressure is significantly reduced or nearly absent. This drastic reduction in pressure means that water can boil at temperatures much lower than 100°C. For instance, at a pressure of 6.5 kPa (0.94 psi), water boils at around 37°C (98.6°F). This is because the reduced pressure requires less energy for water molecules to transition from the liquid phase to the vapor phase.

Application in Vacuum Boilers

Vacuum boilers utilize this principle of reduced boiling point to operate efficiently at lower temperatures. These boilers are used in various industrial processes where gentle heating is required or where the risk of overheating must be minimized.

Advantages of Vacuum Boilers

  • Energy Efficiency: Operating at lower temperatures reduces energy consumption, leading to cost savings.

  • Safety: Lower operating temperatures reduce the risk of burns and other heat-related hazards.

  • Reduced Scaling: Lower temperatures minimize the formation of scale and deposits, prolonging the boiler’s lifespan.

  • Enhanced Control: Precise temperature control is easier to achieve, improving process consistency.

Key Components of a Vacuum Boiler

  • Vacuum Pump: Creates the vacuum environment by removing air and reducing pressure.

  • Heat Exchanger: Transfers heat to the water at a controlled rate.

  • Control System: Monitors and adjusts pressure and temperature to maintain optimal conditions.

  • Safety Valves: Ensure the system operates within safe pressure limits.

Practical Applications

Vacuum boilers are employed in various industries, including:

  • Pharmaceuticals: For processes that require precise temperature control to avoid degradation of sensitive compounds.

  • Food Processing: To pasteurize products at lower temperatures, preserving flavor and nutritional value.

  • Chemical Manufacturing: For reactions that require controlled heating to prevent unwanted side reactions.


Water boils in a vacuum due to the reduced atmospheric pressure, which lowers the boiling point. This principle is harnessed in vacuum boilers to achieve energy-efficient, safe, and precise heating in industrial processes. Understanding the science behind boiling in a vacuum and the practical benefits of vacuum boilers can help industries optimize their operations and improve overall efficiency.


Complete knowledge about boilers.

Boilers are indispensable and important equipment in industrial production and daily life. Its operating principles and related knowledge are crucial to ensure its safe and efficient operation. Below you will be given a complete analysis of basic boiler knowledge.

1. Definition and classification of boilers

A boiler is an energy conversion device that primarily uses thermal energy or other thermal energy released by the combustion of fuel to heat water and convert it into hot water or steam. Boilers can be divided into many types according to different classification standards. For example, boilers can be divided into power plant boilers, industrial boilers, marine boilers, locomotive boilers, etc. according to its uses; boilers can be divided into low pressure, medium pressure, high pressure and ultra-high pressure; , subcritical pressure boilers, supercritical pressure boilers according to the output steam pressure, boilers can be divided according to fuel Divided into coal boilers, oil boilers, gas boilers, waste heat boilers, electric boilers, gas boilers biomass, etc.

2. Principle of operation of the boiler.

The working principle of the boiler mainly includes three processes: combustion, heat transfer and steam-water circulation. The fuel burns in the combustion chamber of the boiler and releases a large amount of thermal energy; This thermal energy is transferred to the water through the heating surface of the boiler, heating the water into hot water or circulating steam; into the boiler's steam-water system to complete the energy conversion process.

3. Main components of the boiler.

The main components of the boiler include the furnace, drum, water wall, superheater, economizer, air preheater, frame and furnace wall. The furnace is the place where the fuel is burned, the drum is a container for storing hot water or steam, the water wall is a radiant heating surface arranged around the furnace and the superheater, economizer and air preheater are the boiler heat exchange equipment. To improve the thermal efficiency of the boiler.

4. Operation and maintenance of the boiler.

Boiler operation and maintenance are key to ensuring its safe and efficient operation. During operation, key indicators such as combustion parameters, water level and steam pressure must be strictly controlled to ensure the stable operation of the boiler. At the same time, the boiler should be periodically inspected, repaired and maintained, and various faults and hidden dangers should be discovered and solved in a timely manner to ensure the reliability and service life of the boiler.

5. Boiler safety and environmental protection.

Boiler safety and environmental protection issues have always attracted much attention. During operation, relevant safety regulations and operating procedures must be strictly observed to ensure the safe operation of the boiler. At the same time, effective environmental protection measures, such as the use of low-sulfur fuels and the installation of dust removal and desulfurization equipment, are taken to reduce polluting emissions from boilers and protect the environment.

In summary, as an important energy conversion equipment in industrial production and daily life, the knowledge of boilers involves many aspects. Understanding the basics of a boiler, how it works, its main components and how to operate and maintain it is crucial to ensuring its safe and efficient operation. At the same time, paying attention to the safety and environmental protection of boilers are also aspects that we should pay special attention to when using boilers.


Complete Boiler Repairs Guide | Everything You Need to Know

What are the potential causes of a boiler breakdown?

A boiler breakdown can occur due to various reasons. Some potential causes of a boiler breakdown include:

Component failure: Components within the boiler system can wear out or malfunction over time, leading to a breakdown. This could include a pump, pressure relief valve, thermostat, motorized valves, or ignition system issues.

Lack of maintenance: Inadequate maintenance can contribute to boiler breakdowns. Without regular servicing, problems like mineral and sediment buildup, corrosion, or faulty electrical connections can arise, affecting the performance and reliability of the boiler.

Ignition problems: If the boiler's ignition system fails, it won't be able to ignite the fuel and start the heating process. Issues with the ignition switch, faulty electrodes, or problems with the gas supply could cause this.

Water pressure issues: Low or fluctuations in water pressure can cause the boiler to malfunction or shut down. This could be due to problems with the water supply, a faulty pressure relief valve, or issues with the expansion vessel.

Frozen pipes: During freezing weather, the pipes connected to the boiler can freeze, leading to blockages and potential damage. Frozen pipes can disrupt the flow of water or cause cracks and leaks.

Gas supply problems: If your
boiler operates on gas, issues with the gas supply can result in a breakdown. This could include problems with the gas meter, gas valve, or a disruption in the gas supply line.

Electrical issues: Faulty wiring, blown fuses, or electrical component failures can cause the boiler to stop functioning. Electrical problems can affect boiler parts, such as the control panel or motorized valves.

Age-related wear and tear: As a boiler age, its components naturally deteriorate, increasing the likelihood of breakdowns. Older boilers may be more prone to failures, especially if they haven't received proper maintenance or repairs.

It's essential to have a qualified boiler technician diagnose the specific cause of the breakdown to ensure an accurate repair and prevent future issues. Regular maintenance and promptly addressing minor problems can help minimize the risk of a significant breakdown.

boiler repirs


How do I know if my boiler needs repair?

If you're wondering whether your boiler requires repair, there are several signs to watch out for:

Uneven heating: If you notice inconsistent heating in your home, such as some rooms being colder than others or difficulty reaching the desired temperature, it could indicate a problem with your boiler.

Strange noises: Unusual sounds like banging, whistling, or gurgling from your boiler could suggest issues such as a faulty pump, trapped air, or mineral deposits.

Water leaks: You may need attention if you spot water pooling around your boiler or notice dampness or corrosion near the unit.

Reduced efficiency: If your energy bills suddenly skyrocket without an apparent reason or your boiler takes longer to heat water or radiators, it might signal an efficiency problem that requires repair.

Pilot light issues: If the pilot light frequently goes out or changes color (e.g., from blue to yellow), it could indicate a ventilation issue or a problem with the gas supply.

Increased pressure or fluctuations: If the pressure gauge on your boiler shows excessively high or low pressure or fluctuates unexpectedly, it's advisable to have it checked to prevent further damage.

Odors: Unpleasant smells should be taken seriously, particularly those resembling gas or burning. These odors could indicate a gas leak or an overheating component.

Age and lack of maintenance: If your boiler is old or hasn't received regular maintenance, it becomes more prone to breakdowns. Routine inspections and maintenance help identify potential problems before they escalate.


How do I repair my boiler?

Repairing a boiler can be a complex task that requires technical knowledge and expertise. While there are minor boiler issues that you can troubleshoot yourself, it's important to note that significant repairs should be left to qualified professionals for safety and to ensure proper resolution. However, if you feel confident in your abilities and want to attempt basic troubleshooting, here are some steps you can take:

Check the basics: Ensure that the boiler receives power and that the switches or circuit breakers are in the correct position. Verify that the thermostat is set properly and functioning correctly.

Check the pilot light or ignition system: If the boiler uses a pilot light, ensure it is lit. If it goes out, try relighting it according to the manufacturer's instructions. For boilers with electronic ignition systems, check for error codes or indicators that might suggest a problem with the ignition.

Check water pressure: Low water pressure can cause boilers to malfunction. Check the pressure gauge on the boiler and ensure it is within the recommended range. If it's too low, refer to the boiler's manual to learn how to increase the water pressure safely.

Bleed radiators: If your radiators are not heating evenly or have cold spots, air may be trapped in the system. Use a radiator key to bleed the air out by opening the air vent on each radiator until water starts to flow consistently.

Inspect for leaks: Inspect the boiler and surrounding pipes for any signs of leaks. If you find a leak, it's advisable to contact a professional, as it may require specialized repairs.

Clean or replace filters: Clogged filters can affect the boiler's efficiency. Consult the manufacturer's instructions to locate and clean or replace the filters.

Reset the boiler: Some boilers have reset buttons or switches that can be used to restart the system. Refer to the boiler's manual to locate and safely perform a reset if applicable.

Remember, these steps are general guidelines and may not apply to all boiler models or types. You should contact a qualified boiler repair technician if the problem persists or encounters more complex issues, such as faulty components or significant malfunctions.

boiler repairs cost


How much does boiler repair typically cost?

The boiler repair cost can vary depending on several factors, including the nature and extent of the issue, your location, the service provider, and the specific type and model of your boiler. It's important to note that the following estimates are rough guidelines, and actual costs may differ:

Minor Repairs: Minor boiler repairs, such as fixing a faulty thermostat, replacing a valve, or repairing a small leak, can range from $100 to $500. These are typically straightforward repairs that don't require extensive labor or expensive parts.

Major Repairs: More significant boiler repairs, such as replacing a heat exchanger, repairing a circulator pump, or addressing complex electrical issues, can cost anywhere from $500 to $1,500 or more. The cost can vary significantly depending on the repair required and the labor involved.

Keep in mind that investing in professional boiler repair is often more cost-effective in the long run, as it ensures the problem is addressed correctly, minimizes the risk of further damage, and helps maintain the efficiency and reliability of your boiler.


The role of each part of the boiler body

1. Drum: The function of the drum is to collect, store, purify steam and make up water. The drum of the hot water boiler is filled with hot water, while the lower drum of the steam boiler is filled with hot water, the lower part of the upper drum is hot water, the upper part is the steam space, the surface of the water is called the water surface, and the location of the steam-water boundary is called water line.

2. Water cooling wall: The cooling wall is the radiant heating surface arranged around the furnace. It is the main heating surface of the boiler.

3. Convection tube bundle: The flow tube bundle is the convection heating surface of the boiler. It absorbs the heat of high temperature flue gas, and the heat absorption is related to the flow rate of flue gas, the arrangement of pipes, and the way of flue gas flushing.

4. Descending pipe: The main function is to transport the water in the drum to the lower header, so that the heating surface pipe has enough circulating water to ensure reliable operation.

5. Header: It mainly collects and distributes pot water to ensure reliable water supply for each heating surface pipe or to collect water or soda mixture from each pipe. Generally, the header should not be exposed to radiant heat to avoid the generation of internal water. Bubble cooling is not good, overheating burns out.

6. Superheater: The superheater is the auxiliary heating surface of the steam boiler. Its function is to draw saturated steam from the upper drum under the condition of constant pressure, and then heat it to evaporate the water in the saturated steam and make the steam temperature. Raise, improve steam quality, become superheated steam.

7. Coal economizer: The coal economizer is a heat exchanger that is arranged in the flue at the tail of the boiler and uses the waste heat of the exhaust gas temperature to increase the temperature of the feed water. Generally speaking, every time the water temperature at the outlet of the economizer increases by 1°C, the exhaust gas temperature of the boiler decreases by 2-3°C on average, and the feed water temperature does not increase by 6-7°C. Save 1% of coal, and generally, boilers equipped with economizers can save 5-10% of coal.

Any parts of the boiler can be found at


Comparison of Atmospheric Pressure Hot Water Boiler and Vacuum Hot Water Boiler

Basic Principles

1. Atmospheric pressure hot water boiler

Atmospheric pressure hot water boiler is also called non-pressure hot water boiler. The drum is filled with water and heated by direct combustion in the furnace to form hot water. It belongs to the category of civil domestic boilers. The atmospheric pressure hot water boiler is a non-pressure hot water boiler with an air vent on the top and the boiler body is always in a normal pressure operation state. Its main feature is that the boiler is not under pressure and has no potential safety hazards. , mainly used for heating and production of hot water, is one of our more common boiler varieties.

Advantages: simple to manufacture and easy to install; the boiler is directly vented to the atmosphere, which is safer than the pressure boiler;

Disadvantages: The boiler system cannot directly supply heat because it cannot bear pressure. It needs to be equipped with accessories such as external heat exchangers. The cost of the system is high; the startup is slow and the preheating time is long; after the boiler is scaled, the thermal efficiency decreases year by year, and the service life generally does not exceed 8-10 year;

2. Vacuum hot water boiler

The vacuum boiler forms a negative pressure vacuum environment inside the closed furnace body, and fills the heat medium water in the body. The heat medium water is heated by combustion or other methods, and the heat medium water is heated to generate steam, and the steam heats the water in the heat exchanger tubes through condensation heat exchange to realize the supply of hot water.

Advantages: high thermal efficiency, the boiler will never scale, and achieve semi-permanent life (more than 20 years); fast start-up, small preheating loss; multi-channel water supply, multi-purpose for one machine; negative pressure operation, safer.

Disadvantages: high manufacturing requirements; hot water outlet temperature up to 90 ℃.

Comparison of heating systems

1. The hot water supply system of the atmospheric hot water boiler is adopted:

According to the current national standards and specifications, the atmospheric pressure hot water boiler is not allowed to bear pressure when it is in operation. In order to meet the usage requirements when the heating system is running, it can only be made up by configuring other auxiliary equipment in the system to make it perfect. System Features:

a. The system is complex, with many equipment and control systems, which are prone to failures and cumbersome operations (requires full-time personnel);

b. There are many auxiliary equipment, high installation requirements, large floor space, and increased initial investment;

c. The number of intermediate heat exchanges is large, the heat loss of the system is large, the operating cost is high, and the thermal efficiency of the system is low (about 80%);

d. The maintenance cost is high, and the service life of the boiler equipment is short (about 8 years);

e. The water temperature of the hot water tank cannot be controlled, the water temperature is not constant, and the water temperature of the hot water supply system fluctuates greatly.

2. The hot water supply system of vacuum hot water unit is adopted:

According to the structural characteristics of the vacuum hot water unit, the state expressly stipulates that it is not a special equipment, can withstand pressure (standard pressure 1.0Mpa) during operation, and can be directly connected to the system for use. System Features:

a. The system is simple and reliable, and the operation is convenient (unmanned operation is possible);

b. Less equipment configuration, low installation requirements, small footprint, and low initial investment;

c. The intermediate heat exchange loss is almost zero, the operating cost is low, and the thermal efficiency of the system is high (over 90%);

d. Maintenance is simple, the cost is low, and the service life of the unit equipment is long (up to 20 years);

e. Automatic constant temperature water supply, high quality hot water.


What are the functions of industrial steam boilers? How does a steam boiler work?

Nowadays, with the rapid development of the industry, the scope of application of steam boilers in the industry is becoming more and more extensive. Today, what the editor wants to introduce to you is what are the functions of steam boilers? Follow me below to find out!

How a steam boiler works:
Its working principle is that the heating equipment releases heat, which is absorbed by the water-cooled wall through radiation heat transfer, and the water in the water-cooled wall boils and vaporizes, generating a large amount of steam into the steam drum for steam-water separation, and the separated saturated steam enters the superheater. The method continues to absorb the heat of the flue gas protecting the top of the furnace, the horizontal flue and the tail flue, and makes the superheated steam reach the required working temperature.

A simple understanding is to boil hot water, the pot is equal to the kettle for water, the stove is equal to the stove to burn fuel, and the water in the pot absorbs the heat energy after the fuel is burned in the furnace and converts it into steam.

steam boiler

The role of the steam boiler:
Steam boilers can play an important role in production and daily life. Steam boilers have a sterilizing effect in food processing, medical industry and canning industry.

In the school canteen, food processing, brewing and other industries, the function of the steam boiler is to steam the food, and it can also steam the embryo for brewing.

In school bathhouses, students' daily drinking hot water, hotel hot water supply, hotel hot water supply, bathing halls and other places, the function of the steam boiler is to exchange the heat of the steam to the water through the heat exchanger. After heating the water, there are heating, hot water supply, bathing, production, etc.

In refineries, chemical plants and other places, steam boilers can increase fluidity by heating them. Steam boilers are also used in their production.

In addition to the above points, the use of steam boilers in the production industry is also very extensive.

Precautions for using steam boilers:
Units using steam boilers also need to pay attention that steam boilers must be inspected every year. Only if the inspection results of the relevant departments are qualified, they can continue to be used. If they are not qualified, they will be required to be replaced.

The annual inspection of the steam boiler is mainly to check the condition of the drum. There is no bulge in the drum, and the pit depth of oxygen corrosion does not exceed the specified value.

The above is the relevant information about the steam boiler brought to you today. I hope it will help you to understand the boiler and learn more about the boiler. Follow the Fangkuai Boiler website to show you more about the boiler.


For steam boilers, what does "evaporation capacity" mean?

When purchasing a steam boiler, it is best for users to have a certain understanding of the various parameters of the boiler. This will not only ensure that the appropriate boiler model is purchased, but also will not be deceived by bad boiler manufacturers and lose costs in vain. For steam boilers, "evaporation capacity" is a relatively important parameter, Zhengzhou Fangkuai Boiler Factory will come to show you.

The amount of steam produced by a steam boiler per hour is called the boiler’s evaporation, also known as "output" or "capacity". It is represented by the symbol "D", and the commonly used unit is t/h.
       The boiler evaporation capacity is divided into rated evaporation capacity, economic evaporation capacity and maximum continuous evaporation capacity.
       (1) Rated evaporating capacity The steam boiler uses the fuel specified in the design under the rated steam pressure, the rated steam temperature, and the rated feed water temperature, and the evaporative capacity per hour specified when the efficiency is guaranteed. The evaporation capacity indicated on the metal nameplate of the boiler product is the rated evaporation capacity of the boiler.
       (2) Economic evaporation capacity In continuous operation of the steam boiler, the evaporation capacity at the highest efficiency is called economic evaporation capacity. The economic evaporation is about 75% to 80% of the rated evaporation.
       (3) Maximum continuous evaporation The maximum evaporation that the steam boiler can achieve during long-term continuous operation under the conditions of rated steam parameters, rated feed water temperature and use of the designed fuel is called the maximum continuous evaporation. At this time, the efficiency of the boiler will be reduced, so try to avoid the boiler running under the maximum continuous evaporation capacity.


Boilers are essential for keeping homes and businesses warm and comfortable, but when they start shutting off unexpectedly, it can be frustrating and confusing. Understanding the cause of frequent shutoffs and knowing how to troubleshoot them can save time and money. This article explores common problems that cause boilers to shut off and provides practical solutions to fix them.

Troubleshooting Guide: Why Your Boiler Keeps Shutting Off

The development of social science and technology and technical means has promoted the rapid development of the breeding industry. People obtain meat, eggs, milk, wool, cashmere, hides, silk and medicinal materials from poultry such as chickens, ducks and geese through artificial breeding. For many farms, maintaining a constant temperature living environment for poultry is a top priority.
How to choose the type of hot water boiler for heat preservation in farms, Fangkuai Boiler can give you the most sincere guidance and advice.
Taking a shrimp farm as an example, we will focus on how users in the aquaculture industry should choose suitable hot water boilers.
Generally speaking, shrimp farming requires "cold water", but this "cold water" refers to the natural water temperature in a normal environment, that is, a temperature between 10-20 °C. However, in winter, it is necessary to start the hot water boiler equipment to maintain the temperature of the shrimp pond and ensure that the shrimp can survive normally.
In order to meet the needs of the livestock for the environment and diet, a device that can output heat in a lasting and stable manner is required. We can see that in many large farms, one or several steam or hot water boilers will be equipped for the livestock of the farm.
The shrimp farm that cooperated with Fangkuai Boiler this time needs to use a boiler to maintain the constant temperature of the shrimp pond. According to the knowledge of Fangkuai boiler sales consultant, the shrimp farm has a total pool volume of 20 tons. The boiler is mainly used in winter, and the water at subzero temperature needs to be heated to about 10°C. After calculation, the technicians of Fangkuai Boiler concluded that a half-ton atmospheric pressure hot water boiler can meet their needs. For this reason, we provided a boiler with an output of 0.35MW (that is, a half-ton capacity). Atmospheric pressure vertical gas hot water boiler (CLSH0.35-95/70-Q). The adjusted hot water boiler can maintain a temperature difference of 14°C between the inlet and outlet water and maintain a constant temperature in the shrimp farm's pool. Combined with the actual situation of the user's project site, the natural gas interface has not yet been connected to the local area. We have customized a plan for using liquefied petroleum gas. The fuel is transported through canned transportation. There is no need to specially prepare a fuel storage site, and it is very clean and convenient to use.

Guidance Scheme for Selection of Hot Water Boilers for Thermal Insulation of Farms

According to the structural design, the use of atmospheric hot water boilers should be of no risk. This is mainly due to the fact that the top of the atmospheric hot water boiler is open to the atmosphere, and the internal pressure is always the same as the outside. Many residential and breeding centers choose to use this type of boiler.

Although the safety of atmospheric pressure hot water boilers is very high, this does not mean that the furnace personnel can be negligent. A relatively old steam boiler located in a fish farm in Wangtan Village, Rudong Town, Rudong County, exploded due to improper operation of the boiler operator.

When using a normal pressure hot water boiler, pay attention to the regular observation of the water level to avoid low water level and dry burning. Otherwise, there will be certain dangers, and the service life of the boiler will be seriously reduced. Boiler operators should pay attention to the following matters:
       1. Strictly implement various rules and regulations, earnestly study the professional knowledge of boilers, continuously improve the level, and ensure the safe and economic operation of boilers.
       2. After the normal pressure hot water boiler is put into use, the unit and individual may not change the boiler structure, valve and pipeline system without authorization.
       3. Inspect and inspect various equipments according to regulations before taking over, including: water level of water tank (hot water tank, expansion water tank), energy consumption (boiler gas meter), thermometer (hot water tank temperature, boiler heat medium water temperature), etc. Check the operation records, check the equipment, and learn more about the boiler operation when you transfer the shift.
       4. The succession personnel will go to the boiler room in advance to prepare for the work according to the regulations, shifts and prescribed time, and understand the boiler operation.
       5. The shifter should prepare in advance, carry out serious and comprehensive inspections and investigations, and keep the boiler running normally.
       6. The shifting staff should introduce the relevant problems of equipment operation, water quality and boiler discharge to the successor. If the handover procedure is not completed, the handover personnel must not leave the job. 7. Keep the boiler body clean when the boiler is running, no dirt, no leakage, no rust and corrosion, and fill in the equipment maintenance record carefully and in detail.
       8. The boiler room is one of the key departments of the boiler unit. Except for the boiler room staff, relevant leaders, and safety, security, and department management personnel, other personnel are not allowed to enter without permission.
       9. It is forbidden to store inflammable, explosive and other miscellaneous items in the boiler room. It is necessary to install oil drums and oil pots with a small amount of lubricating oil and cleaning oil. Store them at the designated place and pay attention to check whether there is explosives in the burning.
       10. The boiler room should be equipped with fire-fighting equipment, carefully managed, do not move or use it for other purposes.
       11. The floor, walls, doors and windows of the boiler room are always kept clean and hygienic.
       12. The supervisors should check the operation records and environmental sanitation regularly and irregularly, find problems and solve them in time.
       13. Go to work on time according to the prescribed time, do a good job of shifting records, and do not leave the job casually.
       14. It is strictly forbidden to drink alcohol, sleep, gamble, and fight in the boiler room.
       15. After equipment failures and accidents are reported in time (timely reported to the person in charge at night), the written accident report is written in a realistic manner. After the investigation is clear, after the responsibility is clarified, the accidental loss is caused to the dereliction of duty, and the responsibility is handled.

How to make the normal pressure hot water boiler operate safely?

There are three reasons for the explosion of a gas boiler: gas (fuel), air and heat. Once the three reach a certain level, it is not far from the explosion of the boiler.

The key to preventing the explosion of gas boilers is to prevent the three from reaching certain limits at the same time. Among them, air is ubiquitous, it is very difficult to remove this condition, so the focus of explosion-proof is concentrated on gas and heat sources. Therefore, almost all gas explosion-proof technologies at this stage focus on how to treat gas and heat sources.

A large number of accidents indicate that the explosion of the gas boiler boiler or flue site is caused by the accumulation of gas and air in the furnace or flue, and the fire or high-temperature heat source. The combustible mixture is obviously mixed with air from the air. Forming. Therefore, the core of preventing gas boiler explosion is to prevent the boiler from entering the furnace when it is not running (no flame in the furnace); and it should be noted that the boiler must be "fire and other gas" when it starts, that is, the gas is first supplied and then ignited to form a heat source.

To this end, "Steam Boiler Safety Technical Supervision Regulations" and "Hot Water Boiler Safety Technical Supervision Regulations" clearly stipulate that: gas (including fuel, pulverized coal) boilers must be equipped with reliable ignition program control and flameout protection devices; Explosion-proof doors should also be installed in inflammable and explosive parts such as furnaces and flue ducts. The first half of the regulation is actually based on the mechanism of the explosion to prevent the formation of a mixture of gas and air, and to ensure the realization of "fire and other gas"; the latter part is used as a remedy, once the furnace or flue explosion, through the explosion-proof door Reduce the damage caused by the explosion.

How to prevent gas boiler explosion?

Pickling is the main method for removing a large amount of oxidizing substances and corrosion products inside a gas boiler, and also has the effect of eliminating scale. The pickling process is usually carried out after 1-3 weeks of boiler operation. FANGKUAI Boiler summarizes the steps of boiler pickling for your reference and understanding.

First, cleaning tools
       Boiler energy saver, steam drum, water wall, hydrochloric acid, ammonium bifluoride.

Second, the cleaning method
       1. First, at the beginning of the pickling work, the boiler's economizer, steam drum and water wall are filled with demineralized water.
       2. The boiler is ignited. When the temperature of the boiler rises to 70-80 ° C, the boiler is turned off, and then the pickling operation can be performed. Before the pickling operation, the superheater should also be recharged with demineralized water until the water overflows into the steam drum to prevent acid or acid vapor from being introduced into the superheater.
       3. When the acid is charged into the boiler, the boiler should not be ignited under any circumstances. The steam drum and other venting holes should be opened to remove the hydrogen generated by the reaction of acid and iron. Before making sure that the hydrogen has dissipated, avoid open flames or use electrical equipment that generates sparks to avoid the risk of hydrogen explosion.
       4. Finally, after the acid filling is completed, let the boiler and economizer soak for about 6 hours in the solution, then drain the acid and rinse the superheater with demineralized water. The acid is discharged. After the acid is drained, the boiler feed water pump is operated, and the water of one economizer is filled into the boiler to prevent the water supply shutoff valve from leaking.

Third, matters needing attention
       The gas boiler can be pickled with 5% hydrochloric acid with 0.25% ammonium difluoride inhibitor added. The acid solution is injected into the boiler through the pickling joint on the steam drum down pipe, and the acid filling of the economizer is carried out through the recirculation pipe. The filling of the acid solution should be carried out until the liquid level in the steam drum temporary water level gauge rises significantly until the liquid level rises above the cyclone separator, but it should be noted that the acid liquid cannot enter the superheater, otherwise it will cause serious damage.

How to clean the gas boiler?