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Boiler Knowledge

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.

2023-06-29

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 https://www.boilermanufactory.com/products/parts/

2022-05-14

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.

2022-04-29

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.

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.

2022-04-11

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.

2021-11-29

What types of boiler equipment are available on the market?

Boiler equipment has played an important role in the development of our country. Nowadays, there are many kinds of boiler equipment on the market, and many users and friends will inevitably not know how to choose. Zhengzhou Fangkuai Boiler Factory has summarized the following classification of boilers for your reference and understanding.

1. Classified by boiler purpose
Divided into thermal power boilers and heating boilers. Power boilers include power station boilers, ship boilers and locomotive boilers, etc., which are used for power generation, ship power and locomotive power accordingly. Heating boilers include steam boilers, hot water boilers, heat pipe boilers, hot blast stoves and heating medium heating furnaces, etc., and obtain steam and hot water accordingly. Hot air and heating medium, etc.

2. Classified by boiler body structure
Mainly divided into fire tube boilers and water tube boilers. Fire tube boilers include vertical boilers and horizontal boilers, and water tube boilers include horizontal water tube boilers and vertical water tube boilers.

3. Classified by the type of fuel used in the boiler
Divided into coal-fired boilers, oil-fired boilers and gas-fired boilers, as well as pulverized coal boilers, gas dual-purpose boilers. Coal-fired boilers can be divided into layer-fired boilers, room-fired boilers and boiling boilers according to their combustion methods.

4. Classified by boiler capacity
Those with an evaporation capacity of less than 20t/h are called small boilers, those with an evaporation capacity of more than 75t/h are called large boilers, and those with an evaporation capacity between the two are called medium-sized boilers.

5. Classified by boiler pressure
Boilers below 2.5MPa are called low-pressure boilers, those above 6.0MPa are called high-pressure boilers, and those with a pressure between the two are called medium-pressure boilers. In addition, there are ultra-high pressure boilers, subcritical boilers and supercritical boilers.

6. Classified by boiler water circulation form
Divided into natural circulation boilers and forced circulation boilers (including once-through boilers).

7. Classified by device form
Divided into quick-installed boilers, assembled boilers and bulk boilers. In addition, there are wall-mounted boilers, vacuum boilers and modular boilers.

2021-11-27

What type of hot water boiler is better for greenhouse planting?

Greenhouse planting technology allows us to eat green vegetables even in the cold winter, and one of the equipment to ensure that the greenhouse can still maintain a constant temperature in winter is the hot water boiler. Only one easy-to-use hot water boiler can maintain the needs of all the greenhouses throughout the winter, allowing users to worry and rest assured. What type of hot water boiler is better for greenhouse planting? The professional Zhengzhou Fangkuai boiler manufacturer will answer for you.

Generally speaking, the capacity of the hot water boiler should be determined according to the area of the greenhouse, so that the appropriate boiler equipment can be purchased. At the same time, it is necessary to choose the model of the hot water boiler according to the structure of its own boiler room, whether it is horizontal or vertical. Of course, the operating efficiency of the boiler cannot be ignored. A good hot water boiler has a very high operating efficiency. It can save at least one hundred thousand to several hundred thousand yuan in fuel costs over the entire winter.

Therefore, Zhengzhou Fangkuai Boiler Factory recommends that if you need to use a hot water boiler, it is best to contact a professional boiler manufacturer, and its skilled boiler engineer will formulate a detailed boiler systemization plan, including auxiliary equipment and boiler room layout. , Quotation and more information.

At the same time, everyone should pay attention to the fire separation range when designing the boiler room.
       1. The boiler room is a Category D production plant. When the rated evaporation capacity of the steam boiler is greater than 4t/h, and the rated output of the hot water boiler is greater than 2.8MW, the boiler room building should not be lower than the Class II fire resistance level; the rated evaporation capacity of the steam boiler is less than or equal to When the rated output of 4t/h and hot water boiler is less than or equal to 2.8MW, the boiler room building shall not be lower than the third-class fire resistance level;
       2. The oil tank room, the oil pump room and the oil heater room are all category C production plants, and their buildings should not be lower than the second-class fire resistance level. When the above rooms are arranged in the auxiliary rooms of the boiler room, a firewall should be set up to separate them from other rooms;
       3. The gas pressure regulating room is a Class A production plant, and its building should not be lower than the second fire resistance level. The pressure regulating room adjacent to the boiler room should be separated from the boiler room by a firewall, and its doors and windows should be opened outwards. Directly lead to the boiler room, and the floor should be a non-sparking floor.

2021-11-25

What aspects should be considered when choosing a hot water boiler for a goose farm?

Goose is a relatively common poultry with strong disease resistance and low pollution. As a green food, it is more and more popular. There are many goose farms in our country with different scales, which add more flavor to our daily diet. For goose farms, hot water boilers are indispensable for constant temperature breeding. What aspects do you need to look at when choosing a hot water boiler?

First of all, it is necessary to have a correct understanding of the capacity of the hot water boiler, which depends on the scale of the goose farm and the demand for heat. Generally speaking, a hot water boiler of about 1 ton is sufficient for the goose farm.

Secondly, the hot water boiler should be selected according to local environmental protection standards. At present, my country's environmental protection standards are still relatively strict, and it is necessary to select a hot water boiler that meets the requirements according to the local pollutant emission standards.

2021-11-23

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Boiler Knowledge

Complete Boiler Repairs Guide | Everything You Need to Know

How do I know if my boiler needs repair?

How do I repair my boiler?

How much does boiler repair typically cost?

The role of each part of the boiler body

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

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

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

What types of boiler equipment are available on the market?

What type of hot water boiler is better for greenhouse planting?

What aspects should be considered when choosing a hot water boiler for a goose farm?

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