Boiler Knowledge

What preparations need to be done before installation of industrial boilers?

Industrial boilers are special equipment, and a series of installation operations are required before start-up. Everyone must not ignore this process, which is related to the safe and stable operation of the boiler in the later period. So what preparations need to be done before the installation of the industrial boiler? Let the technical engineers of Zhengzhou Fangkuai Boiler Factory answer for you.

First, check the completeness and accuracy of the boiler technical data, and register and file; prepare the technical documents for the construction; handle the boiler installation start-up report; count the equipment parts on site, register the missing parts, and fill in the main parts Quality inspection records; conduct site use of land, water, electricity, gas, and temporary construction; organize the entry of construction machinery and tools, etc.

Acceptance and marking of industrial boiler foundation: The installer shall inspect and accept the boiler foundation together with the construction unit, construction supervisor, and civil engineering personnel, and fill in the basic records; draw the vertical and horizontal centerline of the boiler, the elevation datum point and each foundation according to the coordinates of the drawing The position of the coordinate center.

Installation of industrial boiler steel frame and platform: check the number and external dimensions of the steel frame platform, fill in the record, adjust and correct if it exceeds the standard, and fill in the corrected actual delay in the record table; configure the foundation shim; bulk steel The frame is assembled into a piece, after passing the inspection, it is hoisted in place, and the steel beams are aligned, fixed, welded, and the geometric dimensions after welding are measured, and the steel frame installation records are filled in; the boiler foundation secondary grouting; the steel platform bracket installation.

Installation work of the heating surface of the industrial boiler body: the quality review of the drum and header, especially the quality of the account connecting hole, should be focused on inspection, measurement, and fill in the record, the quality of the heating surface tube, the quality inspection, measurement, and fill in the record; the heating surface Proofing, annealing and tube end treatment of the pipe; installation and fixing of the drum support and drum, and keep records; the hoisting of the header, correct, fix, and make a record; expand the pipe, strictly control the expansion of the pipe Quality, and make a record; before and after the expansion of the tube, each tube should be tested through the ball, and recorded and so on.

The assembly work of the industrial boiler water wall tube row: the piece welding and alignment of the water wall tube, the pass test before and after the welding, and make a record; the installation of the down tube.

Installation of industrial boiler superheater: calibration and ball passing test of superheater serpentine tube, and make records; installation, alignment, fixing and recording of superheater box; alloy of serpentine tube, pipe clamp and hanger Material spectrum analysis and inspection report of steel parts; group welding and geometric measurement records of serpentine pipes, hoisting in place, aligning and fixing, and filling in records of superheater installation.

2021-05-07 11:42:53

How many types of energy-saving boilers are there? How is energy saving achieved?

For industrial boiler equipment, it is naturally a very good product to be able to save energy and reduce emissions. So are industrial boilers all energy-saving representative products? How to achieve energy saving? Let Zhengzhou Fangkuai Boiler Factory answer for you.

For industrial boilers, energy-saving boilers are divided into three categories: steam boilers, hot water boilers, and organic heat carrier boilers.

Among them, divided by fuel are: coal-fired boilers, oil-fired boilers, gas-fired boilers, biomass boilers, electric boilers, among which the most environmentally friendly is electric boilers. According to the fuel, environmental protection boilers can be divided into electric heating boilers, oil-fired environmental protection boilers, gas environmental protection boilers, and coal-fired environmental protection boilers; according to their use, they can be divided into environmental protection boiling water boilers, environmental protection hot water boilers, environmental protection steam boilers and Environmental protection organic heat carrier boiler, etc. Brought here is definitely an environmentally friendly boiler.

In addition to saving energy and protecting the environment, energy-saving and environmentally friendly boilers also have the characteristics of high thermal efficiency, raw material saving, low operating cost, compact structure, small size, and easy transportation and installation. Of course, all environmentally friendly boilers will have the following main features Features: high thermal efficiency, high safety performance, good environmental protection effect, and high economy.

2021-05-05 11:42:05

What should I do when an industrial boiler needs to be scrapped?

For industrial boiler equipment, no matter how it is maintained and maintained, it has been used for a long time and needs to be scrapped for safety. So, what should be done when industrial boilers need to be scrapped? Let Zhengzhou Fangkuai Boiler Factory answer for you.

Scraping is after the appraisal by the Boiler Inspection Institute of the Technical Supervision Bureau, they will make an appraisal result and issue a scrap certificate. All the procedures are here. Boiler scrap must be based on two factors. One is the low efficiency, which cannot reach 80% of the design efficiency after maintenance and adjustment; the other is that the pressure components of the boiler cannot be guaranteed to be safe. These two conditions are necessary conditions for mandatory scrapping. There are also environmental protection requirements. For example, the environmental protection level of the old boilers has been upgraded, and the scale of the company has been expanded. The original boilers cannot be guaranteed to produce. These are the reasons for scrapping. New boilers must go to the local government (Development and Reform Commission, Economic Commission). Apply for new installations and go to the Boiler Section of the Technical Supervision Bureau for the record.

While maintaining the industrial boiler, the normal operation of the boiler cannot be ignored. For example, the boiler inlet water needs to be softened. This is due to the process that the water entering the boiler turns into steam under high temperature and high pressure. For example, if there are too many calcium ions in the water, fouling will occur, and the accumulation may cause blockage of the pipeline, resulting in an imbalance of local temperature and pressure inside the pipeline. Caused the boiler to explode. Chemical water is to carry out reasonable filtration and chemical treatment of water so that it can meet the water quality standards of boiler water. It is desalinated water.

2021-05-03 11:41:29

What types of industrial boilers are there? What type of boiler does 100T/H refer to?

Industrial boilers refer to boiler equipment used in the industrial sector. They are generally divided into two types: one is steam, most of which are low-pressure, low-temperature, and small-capacity boilers. The fire bed is mostly burned and has low thermal efficiency. It is used for power generation or supply. For example, a chemical fertilizer plant can be vaporized with coal to synthesize chemical fertilizers. This is a typical industrial boiler. The second is coal-fired. The gas-fired waste heat boiler is generally used to recover waste heat. Zhengzhou Fangkuai boiler manufacturer recommends that everyone should cooperate with professional boiler technical engineers to complete the process of boiler selection and procurement in accordance with the actual situation and needs of their own enterprises.

100T/H refers to the boiler's evaporation capacity, which means that 100 tons of water is evaporated every hour, producing 100 tons of high-temperature steam. Boiler water should remove carbonate, silicate, sulfate and other salts containing calcium and magnesium ions, and remove calcium and magnesium ions in order to prevent the boiler from producing scales containing calcium and magnesium due to the evaporation of water during operation. . This kind of scale adheres to the boiler steel plate or steel pipe, which prevents heat conduction and damages the boiler steel plate. The boiler contains Fe. If there is salt, it will form a galvanic cell, which will electrochemically cause it to be oxidized, thereby reducing the amount of boiler fouling.

2021-04-29 11:39:49

What is the general service life of a steam boiler?

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.

2021-04-27 11:39:19

How big a hot water boiler is needed for the heating area of ​​a 3,000-square-meter plant?

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.

2021-04-25 11:38:46

In boiler equipment, what do the parameters such as 20T and 30T mean?

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.

2021-04-23 11:38:02

What is the hourly gas consumption data of a 1 ton gas steam boiler?

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.

2021-04-19 11:36:56

How is the hot water produced by the atmospheric hot water boiler used as bath water?

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.

2021-04-17 11:36:16

Long-term use of "hard water" in industrial boilers is likely to cause an explosion

"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.

2021-04-15 11:35:33

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