No matter what equipment it is, it has a service life, and the same is true for steam boiler equipment. However, through correct maintenance and maintenance, the service life of the boiler can be effectively extended, thereby improving the cost-effectiveness of the boiler. So, how many years is the general service life of a steam boiler? Let Zhengzhou Fangkuai Boiler Factory tell you the answer.

The service life of a general steam boiler is 20-30 years. According to the quality of the boiler and the use and maintenance of the boiler, the service life of some high-tech steam boilers can reach more than 30 years. But it does not mean that the steam boiler must be scrapped for how many years it has been used, but according to the annual inspection, once the annual inspection fails, it can continue to be used after the annual inspection after the overhaul. If the overhaul still fails to meet the monitoring standards, the steam boiler will have to face Mandatory scrapping.

For steam boilers, the so-called “return” in the boiler industry means: the flame of the burner starts from the burner end inside the boiler and travels several times back and forth inside the boiler. The three-return journey means that the flame goes back and forth three times in your burner. The three-pass steam boiler, if it is a three-pass center flame return, is more environmentally friendly than other boilers because of the presence of secondary combustion. This is also the mainstream furnace structure in Germany and China.

If there is a 3,000-square-meter factory building, starting the heating equipment in cold weather is a very important link. So, how big a hot water boiler is needed for the heating area of ​​a 3,000-square-meter plant? How to accurately choose the boiler model and tonnage? Let Zhengzhou Fangkuai boiler manufacturer tell you the answer.

First of all, it is necessary to judge how big a boiler is needed, and to understand the boiler model, the thermal efficiency of different models of hot water boilers will be different, resulting in different heating areas. The thermal efficiency of the hot water boiler launched by Zhengzhou Fangkuai Boiler Factory is above 98%, which is a very high figure in the entire boiler market. This type of boiler only needs half a ton to heat a 3,000-square-meter plant.

The 0.7Mw of the boiler refers to the rated heat supply of the boiler, which can output 0.7 MW per hour, which is equivalent to a traditional 1-ton hot water boiler. During a day or during a heating period, there will be heating peaks and valleys. The average load means that the total heat supply does not exceed the boiler's total heat supply. At peak times, the heating load will exceed the boiler's rated heat supply. In the low valley, the boiler will have a large margin. We add the total load of the peak and the valley and divide it by the time to get the average load. At peak times, the boiler will be overloaded, users will have insufficient heat supply, and there will be heat waste in the boiler during low valleys. Therefore, the selection and configuration of the boiler must be reasonable.

Although the boiler is relatively large, it is still a relatively sophisticated facility. If the boiler is not properly operated or has a little knowledge, it is easy to malfunction during the operation and lead to dangerous situations. So, in the boiler equipment, what do the parameters such as 20T and 30T mean? Let Zhengzhou Fangkuai boiler manufacturer tell you.

20T and 30T refer to the output of a steam boiler, that is, the rated evaporation capacity "30T" means that the rated evaporation capacity per hour is 30 tons of steam. The hot water boiler uses megawatts to indicate the output of the boiler. 0.7 MW is equivalent to that of a 1T steam boiler. Contribute!

In industrial boilers, the concept of steam drum refers to the pressure drop or rise caused by the circulation of water. It can also be understood that the steam drum is the pressure change formed by the fusion of gas and moisture. The air and water molecules in the ultimate pressure will increase the pressure of the gas. , Resulting in a pressure set molecule generated after the high pressure reaches a certain value. In the industry, the steam drum tank is an industrial equipment that can withstand the air pressure and water pressure generated by the steam drum.

The furnace wall itself is one of the tightly enclosed work contents of the boiler. That is to say, including refractory masonry, furnace walls, heat preservation and other structural work other than pressure components.

The tight-fitting closure of the boiler body is a structure installed on the outermost side of the boiler body, which is mainly composed of a supporting bent plate, a thermal insulation wall plate and self-tapping screws.

The main function of the tight-fitting closure of the boiler body is to make the whole boiler both tight and beautiful, so it is very important. For open-air boilers without a boiler room, the use of a tight-fitting enclosed structure protects the boiler equipment from wind and rain.

Some industrial boilers produce a lot of tail gas after operation. This part of the tail gas can be said to be harmful but not beneficial. For the enterprise, it not only wastes resources, but also causes environmental pollution, and may face remediation by relevant departments. So how to deal with this part of the exhaust gas effectively? Let Zhengzhou Fangkuai Boiler Factory provide you with solutions.

First of all, it depends on the specific type of boiler equipment used by the company. If it is a relatively environmentally friendly boiler such as oil and gas, the internal structure of the boiler is very advanced and reasonable, not only the amount of exhaust gas discharged is very low, but the heat in the exhaust gas can be reinvested Participate in the operation of the boiler, and the content of pollutants in the exhaust gas is very low, so there is no need to be strictly investigated by the relevant departments.

If it is a coal-fired boiler with serious pollution, the boiler flue gas treatment mainly uses two ways of desulfurization and dust removal. The desulfurization is mainly water film\plasma\lime water, all of which require professional equipment, according to the equipment manual. It can be adapted. For dust removal, it is mainly electrostatic, water film, cyclone, cloth bag, etc., also refer to the equipment manual.

A 1 ton gas-fired steam boiler can output 1 ton of high-temperature, high-quality steam per hour, continuously providing steam to the industry and promoting the normal progress of production and processing. Many users are very interested in the data on the hourly gas consumption of the boiler. After all, this is related to the input cost of the boiler. Let Zhengzhou Fangkuai Boiler Factory answer for you.

At present, the gas consumption of 1 ton gas-fired steam boilers on the market varies from 70 to 90 cubic meters per hour. The difference lies in the difference between the heating value of the fuel and the thermal efficiency of the boiler. The calorific value of gas is mostly similar. If the boiler has a high thermal efficiency, the hourly gas consumption of the boiler will be reduced, and it will be more energy-saving. On the contrary, if the boiler has a low thermal efficiency, the hourly gas consumption of the boiler will increase. The energy saving effect will be greatly reduced.

At present, the thermal efficiency of gas-fired steam boilers launched by Zhengzhou Fangkuai Boiler Factory is generally above 97%. Looking at the entire boiler market, this figure is very high. The gas consumption of such a 1-ton gas-fired steam boiler is about 72 cubic meters per hour. Of course, it depends on the actual situation and demand of the user's project site to calculate a more accurate figure.

Atmospheric hot water boiler is a kind of boiler equipment that can output high-temperature hot water. The inside of the boiler is under normal pressure, which is very safe and stable in operation, so it is also deeply loved and used by the majority of users. In many cases, atmospheric hot water boilers are used in the field of heating and bathing. How is the hot water produced by atmospheric hot water boilers used as bath water? Let Zhengzhou Fangkuai Boiler Factory tell you the answer.

First of all, the atmospheric hot water boiler can be installed on the flat ground, the hot water tank is installed at a high place, and the bottom of the water tank is higher than the rain shower nozzle.

The working principle of setting up the boiler in this way is:

Direct supply type------heat the boiler water to the required temperature (such as 45 degrees), open the boiler water inlet valve to adjust so that the boiler water slowly flows into the hot water tank (the outlet water temperature can be controlled by an electronic temperature control valve), The outlet pipe at the bottom of the water tank is connected to the rain shower nozzle pipe for direct use. Disadvantages: the water temperature cannot be adjusted.

Adjustable type-------heat the boiler water to a certain temperature (such as 55 degrees), open the boiler water inlet valve, and the boiler hot water flows into the hot water tank for storage, and the outlet pipe at the bottom of the water tank is connected to the rain shower nozzle pipeline hot water On the pipe, the cold water management is connected to the tap water pipe, and the user can adjust and use it according to his own needs.

"Hard water" is a type of water with a lot of calcium and magnesium plasma. If the boiler uses hard water as the inlet water for a long time, some solid deposits will be firmly attached to the heating surface of the boiler water side after a long time, which is commonly known as " Scaling". The thermal conductivity of scale is very poor, and its thermal conductivity is dozens to hundreds of times smaller than that of boiler steel plates. After the boiler fouls, it will seriously hinder heat transfer and cause the following hazards. In severe cases, it may even cause an explosion. And other dangerous accidents.

1. Waste fuel and reduce output
       After the boiler fouls, it will seriously affect the heat transfer of the heating surface, reduce thermal efficiency, reduce steam output, and increase fuel consumption.

2. Easy to cause accidents and affect safe operation
       After the scale builds up on the heated surface, the heat of the metal is difficult to transfer to the pot water due to the hindrance of the scale, which causes the metal wall temperature to rise sharply. When the temperature exceeds the allowable temperature that the metal can withstand, the strength of the metal is significantly reduced. It will cause the metal to overheat and deform, and in severe cases will cause bulges, cracks, and even pipe bursts.

3. Block the pipes and disrupt the water circulation
       If fouling occurs in the water pipe, the cross-sectional area of ​​the flow will be reduced, the flow resistance of the water will increase, and the normal water circulation will be disrupted. In severe cases, the pipe will be completely blocked or the pipe will burst.

4. Cause corrosion under scale and shorten boiler life
       After the boiler fouls, it will cause damages such as under-scaling corrosion. Some boilers with compact or complex structures are extremely difficult to remove once the heating surface becomes fouled. In severe cases, repair measures such as digging and patching, cutting and replacing pipes can be used, which not only costs a lot, but also severely damages the heating surface. All of the above hazards will greatly shorten the service life of the boiler.

The above is a series of dangerous situations caused by long-term use of hard water in industrial boilers and regrets scaling. If you want to avoid this kind of situation, everyone should pay attention when using the boiler. The boiler inlet water must be softened.

Vacuum hot water boiler is a kind of hot water boiler with vacuum negative pressure inside. Most of them use gas fuel and oil fuel. Compared with ordinary hot water boiler, vacuum hot water boiler has higher operating efficiency and will be more efficient. Safe, basically no safety risks such as explosion.

The vacuum hot water boiler is already very safe, do I still need to conduct an annual inspection? Let Zhengzhou Fangkuai Boiler Factory answer for you.

According to the "Notice on Implementation of Safety Technical Supervision Regulations for Small and Atmospheric Hot Water Boilers" issued by the General Administration of Quality Supervision, Inspection and Quarantine in 2002, it is mentioned that the vacuum phase change boiler has a pressure lower than atmospheric pressure because of its medium circulation system. Therefore, there will be no explosion accident. Manufacturers should manufacture vacuum phase change boilers according to standards, and bear the legal responsibility of informing users (including boiler installers) of safe use and ensuring that the boiler system is always in a vacuum state during use. The installation unit of the vacuum phase change boiler shall be responsible for the quality of the installation meeting the installation requirements specified by the manufacturer.

After installation, the vacuum phase change boiler that meets the above requirements does not need to be confirmed by the boiler and pressure vessel safety supervision agency of the administrative department of quality and technical supervision, nor does it need to go through the registration procedures for use. Therefore, the vacuum boiler does not need to be confirmed by the administrative department of quality and technical supervision after installation, and there is no need to go through registration procedures.

For the normal operation of industrial boilers, a large amount of continuous water is indispensable. This water may be groundwater, river water, etc. If it flows directly into the boiler without pre-treatment, it will definitely cause considerable damage to the boiler in the long run. Zhengzhou Fangkuai Boiler Factory invites you to soften the boiler inlet water.

When softening the water, a water softening device should be used together. A portion of salt can be added. The concentration of the brine is generally 8% to 10%, or it can be saturated at all, depending on the usage of the boiler.

Although the boiler inlet water has been softened, it is inevitable that some dirt will be generated. At this time, the blowdown operation is required. Zhengzhou Fangkuai Boiler Plant has compiled the following procedures for the blowdown of industrial boilers for your study and reference.

1. Eliminate the excess salt and alkali in the boiler water, so that the boiler water quality indicators are always controlled within the scope of national standards.
       2. Eliminate the sludge formed in the boiler.
       3. Grease and foam on the water surface of the sewage boiler.

 

Only by ensuring good boiler water quality and slowing down or preventing scale formation can the safe operation of industrial boilers be ensured.

Industrial boilers are a type of special equipment. If you want to operate safely, you need assistance in many aspects, such as ensuring excellent quality when manufacturing boilers; paying attention to the installation of auxiliary equipment when transporting and installing boilers; and when using boilers. Pay attention to strictly follow the operating specifications, and so on. Here, Zhengzhou Fangkuai Boiler Factory would like to remind you that the "five major chain protection" of boilers cannot be ignored.

The "five major chain protections" of industrial boilers mainly refer to: high and low water level alarm devices, low water level interlock protection devices, overpressure alarm interlock protection devices, over temperature alarm interlock protection devices, etc.

For pulverized coal, oil and gas boilers, there are interlock protection devices that can automatically cut off the fuel supply when the induced draft fan is powered off, and the interlock protection devices that can automatically cut off the fuel or gas supply when the fuel and gas pressures are below the specified value. Ignition program control and flameout protection device, etc.

For hot water boilers, there are interlock protection devices that automatically cut off fuel supply and interlock protection devices that automatically cut off the supply and induced draft fans when the pressure drops to the vaporization pressure or the water temperature exceeds the specified value, or the circulating water pump suddenly stops running.

In the boiler market, according to the difference in capacity, boilers are divided into large, medium, and small, but there is no fixed and clear boundary between them. Therefore, when purchasing boilers, you can directly judge according to your own needs and choose what tonnage industrial boiler equipment to use. In industrial boilers, there are different components such as cylinders, headers, and steam drums. After understanding the functions of these components, the boiler can be operated better, and failures can be solved more quickly.

The sub-cylinder is an accessory of the boiler. It is placed in the boiler room for easy operation. It is used to distribute the steam from the boiler main pipe into several routes for easy adjustment. For example, the sub-cylinder is equipped with three-way branch pipes, one way to the production workshop, one way To the canteen, all the way to the bathroom, in the boiler room, you can conveniently operate the valves of each branch to control.

The header belongs to the pressure part of the boiler body. It is connected to the pressure parts such as the water wall tube and the convection tube in the boiler. The outer diameter is generally less than 325mm. It plays the role of collecting or distributing the circulating water in the boiler. Set the hand hole as an inspection hole, which cannot be accessed by people.

The steam drum or drum (the water heater is called the drum) is the most important pressure part of the boiler. Usually, the boiler is designed with 1 to 3 drums, which are arranged on the upper and lower sides. The upper drum is called the upper drum (the steam boiler is called the steam boiler). There are many accessories in the bag, such as the soda orifice plate, the water distribution pipe, and the top of the steam drum. There should be multiple pipe seats to connect the safety valve, pressure gauge, water outlet pipe, etc.), the lower drum and the upper There are boiler convection pipes between the boiler drums, the number is very large, so the diameter of the boiler drum is much larger than the diameter of the header, so many holes are drilled in the drum, and people can enter for maintenance. Some hot water boilers need to be inside the drum. Arrange several partitions and divide into several water chambers. The steam drum or drum is the most important pressure part of the boiler.

For industrial boilers, the energy efficiency index refers to the use of thermal efficiency index values equivalent to the CIBB2-2009 "Technical Conditions for Energy-saving Products for Industrial Boilers" (Industrial Boiler Branch of China Electrical Equipment Industry Association). To see whether all aspects of the performance of industrial boilers are intentional, just look at the data of energy efficiency indicators. It depends on the specific energy efficiency indicators, and let Zhengzhou Fangkuai Boiler Factory tell you the answer.

1. The slag combustible content index: calculate according to the analysis of representative coal types to determine the appropriate index value.

2. The temperature rise index of the outer surface of the furnace: use the outer surface temperature rise index of the furnace instead. The main assessment is the temperature difference between the outer surface of the furnace and the ambient temperature. It is more scientific and reasonable to use the temperature rise index to eliminate errors caused by changes in ambient temperature in winter and summer.

3. The exhaust gas temperature index of coal-fired boiler: It is consistent with the index of GB/T17954-2007 "Industrial Boiler Economic Operation".

4. Index of excess air coefficient at exhaust gas of coal-fired boiler: consistent with the index of GB/T17954-2007 "Economic Operation of Industrial Boilers".