During the operation of the hot water boiler, if there is a sudden power failure during the operation of the boiler, the pump is stopped, the circulation is interrupted, the temperature of the water at the outlet of the boiler rises sharply, the over-temperature alarm does not give an alarm, and the boiler staff fails to detect a series Under the circumstances, the vaporization phenomenon of the hot water boiler is likely to occur, which is very unfriendly to the boiler itself and the user. Zhengzhou Fangkuai Boiler Factory summarized some 3 measures to prevent the vaporization of hot water boilers, which can help everyone better avoid vaporization of hot water boilers.

1. During the operation of the hot water boiler, the fireman must strengthen inspections and inspect carefully, and deal with it in time if abnormalities are found.

2. The smart test of the monitoring system must be done in place, and at the same time, it must be equipped with alarm equipment when the pump is abnormally stopped, and frequent maintenance.

3. Strengthen the repair and maintenance of hot water boilers, especially the more important parts such as the rotating parts of the water pump and bearings.

Of course, the best prevention is the professionalism and rigorous attitude of the furnace staff, in addition to the power of the equipment. After all, the machine is controlled by humans, so the furnace staff must have a correct attitude and operate the boiler stably.

In the operation of gas-fired hot water boilers, it is necessary to deoxygenate the feed water. The main reason is that oxygen is the main corrosive substance in the boiler water supply system. The oxygen in the water supply system should be removed quickly, otherwise it will corrode the boiler water supply system and components, and the corrosive iron oxide will enter the boiler, deposit or adhere to the boiler On the pipe wall and heating surface, insoluble but poor heat transfer iron scale is formed. Corroded iron scale will cause pits on the inner wall of the pipe and increase the resistance coefficient.

Therefore, in order to ensure the safe operation of the boiler, it is necessary to deoxygenate the boiler feed water; in the national standard "Industrial Boiler Water Quality" (GB1576-2001), the country puts forward strict requirements on boiler water quality, requiring evaporation Steam boilers with a capacity greater than 2t/h and hot water boilers with a rated power ≥4.2MW must be deoxygenated.

Zhengzhou Fangkuai Boiler Factory has summarized some operating skills when deoxygenating the feed water of gas-fired hot water boilers, hoping to help users better use the boilers.
       1. Thermal deaeration
       Thermal deoxygenation can not only remove oxygen in water, but also carbon dioxide or other gases. The deoxygenated water will not increase the salt content, nor will it increase the dissolved amount of other gases, the operation control is relatively easy, and the operation is stable and reliable.
       2. Vacuum deaeration
       Vacuum deaeration is performed at lower than atmospheric pressure (vacuum degree 600~700mmHg). It belongs to low temperature deaeration. Then the so-called vacuum deaeration shows one thing, that is, the degree of vacuum must be maintained. The quality of vacuum deaeration effect is closely related to the degree of vacuum.
       3. Chemical deoxygenation
       Chemical deaeration is also divided into different types, steel scrap deoxidation; sodium sulfite deoxidation; hydrazine deoxidation; resin deoxidation, etc. Different types of chemical deaeration methods have different characteristics. Of course, the water temperature requirement of chemical deaeration is greater than 70°C, 80~90°C has the best effect, and 20~30°C has the worst effect of deoxygenation.
       4. Analysis and deaeration
       The working principle of deoxygenation is to intensively mix and contact the oxygen-free gas with the feed water to be deoxygenated, so that the oxygen dissolved in the water is desorbed into the gas, so that the feed water achieves the purpose of deoxygenation through such circulation.

You can choose the appropriate deaeration method according to your own use of gas-fired hot water boiler to achieve the purpose of deaeration.

Compared with gas-fired steam boilers, gas-fired hot water boilers have a higher safety factor, especially atmospheric and vacuum hot water boilers, but this does not mean that the use of gas-fired hot water boilers is absolutely safe. Improper operation or poor quality of the boiler itself, the gas-fired hot water boiler (steam) water system also has the possibility of explosion. Zhengzhou Fangkuai Boiler Factory summarized some measures to ensure safer operation of gas-fired hot water boilers, hoping to avoid dangerous situations in the boiler.

First of all, in terms of fuel, natural gas has the flammable and explosive properties, so that the gas-water system or delivery system of gas boilers may explode.

In comparison, the latter is a chemical explosion, and the probability of occurrence may be greater. Therefore, on the basis of protecting the former, the focus of the work should be on the safety control of the gas system and resolutely prevent gas safety accidents. If it happens, the following aspects should be taken as the basis for the key protection work:
       1. Strengthen the safety education and skill training of furnace workers
       Safety education and training mainly focus on the basic structure and operating principles of gas-fired hot water boilers, the chemical and physical properties of natural gas, the links that are prone to safety accidents in the operation of gas-fired hot water boilers, the handling of gas accidents and emergency plans, etc. Aspects of training. In addition, in order to avoid the disadvantages of operating gas-fired hot water boilers due to the low cultural quality of the operators, it is necessary to strengthen the skill training of the operators and strictly supervise them to ensure that each operator is proficient in operating skills.
       2. Equipped with necessary gas leak detection equipment to strengthen the active inspection of the gas transmission system.
       Due to a series of problems such as the laying distance of the official website, if there is a gas leak on the way, it will cause a safety accident if it encounters fire factors such as open flames, static electricity, and lightning. Therefore, we must pay great attention to prevent problems before they happen.
       3. Develop emergency plans for gas leakage accidents and organize emergency plan drills regularly.
       Simulate actual combat drills of emergency plans should be carried out regularly. In the simulation of actual combat exercises, it is necessary not to go through the scene and deal with it falsely. It is necessary to be down-to-earth and implement conscientiously, so that the trainees can be fully exercised and cooperate with each other.
       4. The normally open channel of the boiler room of the gas-fired hot water boiler must have access control to effectively prevent irrelevant personnel from entering the boiler's heavy ground at will, which may cause unsafe factors.
       5. The sensitivity and reliability of the gas leak monitoring device and the exhaust system of the gas hot water boiler should be tested on a regular basis, and the fire department should also actively cooperate with the fire department to do the annual inspection of the fire safety alarm device on a regular basis.

The safety of gas-fired hot water boilers during operation is a key factor that we need to consider during the operation. We must conduct timely maintenance and testing. Once problems occur, we will solve them in time, and strive to reduce hidden safety hazards during operation. Lower.

To say that the market price of a 2-ton gas-fired steam boiler is mainly determined according to the boiler main engine, auxiliary equipment, installation cost, freight and other expenses. Different boiler manufacturers, different operating modes, using different materials and different structures of stoves, the final boiler prices are different. Among them, the cost of the boiler body is relatively fixed, and the cost of auxiliary equipment depends on the brand selected by the company. The installation cost and freight must be negotiated with the manufacturer.

When purchasing boilers, many users will find that the prices of gas-fired steam boilers from different manufacturers vary greatly. In fact, you can use this short answer: If you want to buy a car, there are thousands of configuration ranges for different brands. The prices of boilers with different configurations and different efficiencies are of course different.

Therefore, the boiler is the same. Although the steam is the same, the steam boiler is also 2 tons, which can produce 2 tons of steam per hour, that is, whether the output is sufficient.

In addition, it also produces two tons of steam and how much natural gas is consumed. Of course, this is firstly related to the commissioning of the combustion chamber, but it is also mainly related to the technical heating area of ​​the boiler.

The service life of the boiler can not be used for 2-3 years, at least 15 to 20 years, and the design service life is 20 years. The quality of the boiler material directly affects the service life of the boiler, the thickness of the furnace wall and the thickness of the pipe.

Users of gas-fired steam boilers generally choose to use natural gas as fuel, because my country's current natural gas transfer projects have become more popular, and natural gas can be easily used in most areas. For users, it is very important to use gas-fired steam boilers correctly to prevent natural gas leakage.

The main components of natural gas used in gas steam boiler rooms are: methane content of 98%, propane content of 0.3%, butane content of 0.3%, nitrogen content of 1% and other substances; explosion limit: 5% to 15%.

When the concentration of natural gas in the air exceeds 15%, it will cause hypoxia and neurological damage, resulting in respiratory paralysis, coma and even death. A gas explosion is an instantaneous combustion of high-temperature and high-pressure gas up to 3000℃, and the explosion shock wave speed can reach 300 m/s, causing great damage.

Regarding the prevention of the leakage of the membrane water wall pipe of the gas steam boiler, the cause of the leakage should be investigated, and the following preventive measures should be proposed based on the inspection results:
       (1) Clean up the scale and slag accumulated inside the boiler to avoid the formation of a strong alkaline environment in the local position of the boiler;
       (2) It is recommended that the boiler should avoid long-term low-load operation to improve the water circulation state. The load should be kept at about 80% as the best, so as to prevent part of the water wall tube bundle from stagnating in soda;
       (3) The water level meter and the secondary meter display are inconsistent, so adjustments should be made to prevent the boiler from running at a high water level.
       (4) According to the requirements of the specification, for steam boilers with a rated evaporation capacity ≥4 t/h, the boiler water quality analysis shall be conducted at least once every 4 hours. When the boiler water quality is abnormal, the frequency of laboratory tests should be increased to keep the boiler water quality indicators in a qualified state for a long time.

According to my country's regulations: gas-fired steam boilers are special equipment, so everyone must operate in strict accordance with the specifications when using gas-fired steam boilers to avoid safety accidents. Regular inspections of gas-fired steam boilers are very important. Zhengzhou Fangkuai boiler manufacturers explain some of the problems that are easy to find during regular inspections of gas-fired steam boilers to help everyone use the boiler better.

The problems of internal inspection: one is the existence of cracks, and the other is the deformation of some compressed parts. The first problem is a major obstacle to the operation of the boiler. When necessary, welding or replacement is the main way to solve it. To avoid corrosion cracks, it is necessary to strengthen the monitoring of water quality in daily operation. The second type of problem is generally caused by excessive temperature, uneven heating, and insufficient component strength. Strengthening the management of water quality and doing a good job in timely drainage can effectively reduce component deformation.

The inspection methods mentioned in the regular inspection probably include visual inspection, non-destructive inspection, light inspection, etc. Visual inspection: A method to observe whether there is a problem with the boiler by eye. This method is suitable for the condition that no other equipment exists in the early stage of the boiler inspection. When the boiler has obvious external defects, the visual inspection method is more suitable. Compared with other inspection methods, the visual inspection method has the advantages of simple and intuitive, but the visual inspection method has certain requirements on the technical level of the inspectors. Non-destructive testing (NDT) refers to the thermal, electrical, acoustic, magnetic, optical and other reactions caused by the abnormal structure or defect of the material without damaging the performance of the measured object and the internal structure of the measured object. Using physical or chemical methods, using modern technology and equipment, the internal and surface structure, performance, state and type, performance, quantity, shape, location, size, distribution and changes of inspection and testing methods have been studied. Non-destructive testing is generally divided into ultrasonic testing, magnetic particle penetration, X-ray testing, etc. Magnetic particle testing is suitable for boiler parts that are easily magnetized and easily demagnetized, and has incomparable advantages over visual inspection. For the fillet welds of boilers, ultrasonic testing is generally used. This method can be used to detect whether the weld fusion meets the standard. X-ray inspection can accurately identify the internal defects of the boiler structure, and objectively evaluate the internal defects through the radiographic film.

If the gas steam boiler is properly maintained, the service life is very long, and it can even be used for ten or twenty years.

Matters needing attention in the operation of gas-fired steam boilers, because most of the steam boilers used by enterprises and units use gas as fuel, so everyone must pay more attention to the safety of the boiler. In the process of using the boiler, you must strictly follow the operating procedures to check And deal with it to prevent unexpected situations.

Gas is a flammable, explosive, and toxic gas. It has no color. Although it has a certain smell, it is difficult to detect in time by smell. If gas leaks into the furnace or air that is out of service, it will cause blasting. Therefore, the gas pipeline must be strictly tested for leaks. The furnace must have the necessary interlocking maintenance control system. The boiler room must have gas leakage monitoring and alarm devices and ventilation equipment. Use explosion-proof electrical appliances. The boiler should have a strict starting sequence control system. Before burning the gas boiler, it is necessary to carefully purge the furnace and flue to remove the combustible gas that may accumulate in the furnace. Boiler burners must be equipped with flameout safety maintenance devices. Once flameout occurs, it is also necessary to purge and follow normal combustion procedures before secondary combustion. In addition, the gas is transported by pipeline and there is no backup fuel. Once the gas pipeline breaks or the gas pressure is too low, it will cause the boiler to stop.

In our country, steam boilers are special equipment. Because the boiler has a certain pressure, you must pay more attention to safety issues during use. What are the details that need to be paid attention to during the use of steam boilers? This is a question that many users care about. The boiler technical engineer of Zhengzhou Fangkuai Boiler Factory will tell you the answer.

During the operation of the boiler, professional personnel are required for debugging. There are also many precautions during operation. If some parts are improperly operated, it is likely to cause irreparable losses to the boiler. Therefore, for enterprises, it is necessary to have a detailed understanding of some precautions before or after use.

The safety valve on the steam boiler cannot be adjusted arbitrarily. When the pressure gauge reaches over 80% of the agreed working pressure, the safety valve should be vented once. It is forbidden to tie or embed the valve stem. After the steam boiler is pressurized, check whether the steam valve is active, and always pay attention to the water level to keep it at 2/3 of the water level gauge.

Steam boiler water must be softened, kept clean, and contain no grease. The outside of the glass tube of the water level gauge should be equipped with a reinforced protective cover, and the outside should be kept clean. Each shift should be washed once to observe whether the water level in the water level table can rise or fall rapidly. If you see stagnant water panels in the water level gauge during operation, you should find out the cause immediately to avoid false water levels. Before starting a fire in a steam boiler, check whether the water pipes, steam pipes, pressure gauges, safety valves, water level gauges, drain valves, etc. of all valves are in a perfect state. When the furnace is urgently shut down, the combustion should be stopped first, the air door should be closed, the furnace door and the vent valve should be opened, and it is forbidden to add water to the furnace immediately due to water shortage.

In recent years, the frequency of use of gas-fired steam boilers has become higher and higher. This is mainly because this type of boiler is very environmentally friendly and its operating efficiency is also very high. It is completely integrated with energy saving and environmental protection. Zhengzhou Fangkuai boiler manufacturers found in the process of contacting users that many users are not very familiar with whether their own enterprises need to use gas-fired steam boilers. We will explain the industries in which gas-fired steam boilers can be used.

In the scope of application of gas-fired steam boilers in life, boilers mainly produce hot water and steam. For many enterprises, steam is the most used. There are many close relationships with boilers in life. Therefore, we need to have a general understanding of the scope of application of gas-fired steam boilers in life. The main classifications of gas steam boilers are:

1. After the heat exchanger, the heat of the steam is converted into water, and then the water is heated, and then used for heating, bathing and production.

2. It is used for disinfection in food processing, pharmaceutical industry, filling bottles, etc., and can be used for meat and steaming in the food industry. Brewing is also made with steam.

In addition, in the petrochemical industry, steam can heat oil and add fluidity. Steam is also used in the petrochemical production process.

In some import and export enterprises, gas-fired steam boilers are widely used, such as foam boards for thermal insulation, which produce steam to heat raw materials for foaming. Furniture made of wood must be dried with steam to make furniture. The aerated bricks of the building should also be dried with steam, and can also generate electricity and so on.

Users who are using steam boilers have noticed that when the boiler is difficult to make up water, the boiler should be checked in time to find the problem and solve it. There is also a certain way to solve the problem of water supplementation. Let Zhengzhou Fangkuai boiler manufacturer tell you the answer.

For steam boilers that have difficulty in making up water, it is generally necessary to analyze whether the water supply is difficult or the water is fast. If the water supply is difficult, you can first consider whether there is a problem with the water pump, and whether the sewage valve is not closed tightly or whether there is a leak on the boiler body.

The main reasons for the difficulty of making up water for steam boilers are as follows:

1. The head of the feed water pump drops. Due to the internal leakage and wear of the water pump, the pump head naturally drops. You can close the water outlet of the water pump to see if the pressure gauge reaches the pump parameters. If it does not, it means the pump lift drops;

2. The resistance of the water supply pipeline is increased. The main problems are the scaling of pipes and the failure to open the water supply control valve. Disassemble the regulating valve and check;

3. The resistance of the economizer becomes larger. Mainly caused by scaling and leakage on the inner wall of the economizer. Disassemble the economizer elbow to see;

4. Due to the scale, the water outlet on the water distributor in the upper drum sticks to the water scale. This is a common fault. You can open the upper drum to check;

5. It is also a problem that is not easy to find, that is, the sewage valve is not closed tightly or the continuous sewage discharge volume increases. Touch the regular blowdown pipe. If it is very hot, it means that the boiler is losing water, which will also be reflected in the boiler water supply difficulties.

If it is a steam boiler, the water level drops faster than usual. Check whether the blowdown valve is closed tightly and whether the heating surface pipe on the boiler body has water leakage (corrosion perforation).

The heating season of 2020 is coming. For the general public, it is a very happy thing to feel warm in the cold winter. For heating companies, there are many things to consider. Heating area, heating method, heating method, etc., are all issues that need to be considered.

According to statistics from the Zhengzhou Fangkuai boiler manufacturer, most heating companies and heating units currently use hot water boilers for heating instead of steam boilers. Let's take a look at why we prefer to use hot water boilers for heating and why it is more energy-efficient and environmentally friendly to use hot water boilers for heating.

Generally, hot water boilers are used for heating, except for those that require less production processes to use steam. Because it is more energy-saving and environmentally friendly than using steam boilers. First of all, in terms of fuel consumption, hot water boiler heating saves 20-40% of fuel compared with steam boiler heating. This amount is very considerable. There are two reasons to summarize: one is that there is no heat loss due to condensate and secondary transpiration; the other is that the hot water heating pipeline is selected with special heat preservation materials, and the pipeline is as thin as possible under the condition of satisfactory demand, and the heat loss is small. . Relatively speaking, the heat loss caused by steam leakage in steam heating pipes is relatively large.

Hot water boilers require only a few regular blowdowns. Another advantage of hot water heating is that it can flexibly adjust the quality and temperature of hot water. When the outdoor temperature is low, it is necessary to increase the temperature of the hot water to meet people's needs. When the outdoor temperature is high, The ability to lower the temperature of the hot water not only satisfies people's needs, but also achieves the effect of energy saving and environmental protection. And its system repair costs are also low. Hot water boilers can provide heating for residential areas tens of kilometers away. For example, the hot water boilers launched by Zhengzhou Fangkuai boiler manufacturers have a good performance in this respect.

After purchasing a steam boiler, many users do not allow the boiler to run continuously throughout the year. They will decide whether they need to shut down or restart the boiler according to their company's demand for steam. So, what preparations need to be done before restarting the steam boiler? Zhengzhou Fangkuai boiler manufacturer reminds everyone that ventilation and purging must be carried out. As for the reason, let's look down.

Ventilation and purging before the start of the steam boiler is to avoid the remaining combustible gas or pulverized coal in the furnace after the previous shutdown. It may also be because the fuel system is not tight during the shutdown that the combustible gas or pulverized coal leaks into the furnace. When burning, once the torch is inserted into the furnace, if the concentration of combustible gas or coal powder is within the blasting limit, it will cause the furnace to blast, damage the furnace wall, and even cause personal injury. Before burning, start the induced and blower fans, insist on 10%-25% of the rated air volume, and control the ventilation time at about 5 minutes.

Although ventilation with large air volume cannot completely remove the combustible gas or coal remaining or leaking into the furnace, it can dilute the concentration of combustible gas or coal in the furnace to a lower limit far less than the blasting limit, and then ensure the boiler combustion Time equipment and personal safety. After the ventilation is over, the combustion should be carried out as soon as possible to avoid leakage of the fuel system, and the concentration of combustible gas or coal powder in the furnace will rise again to the blasting scale.