Boiler Knowledge

How is the future development trend of gas boilers?

Combined with the status quo of social development and the world energy adjustment strategy, gas boilers have been widely used and used after being introduced into the market. Then, combined with the current situation, how is the development trend of good gas boilers in the future?

Boilers play a very important role in enterprise production and people's lives. However, energy prices have increased significantly in recent years, and the operating cost of boilers is a very large expense for more people. Can afford to afford the boiler. Faced with this problem, manufacturers have changed the boiler's equipment, using advanced condensing equipment to recover the waste heat from the high-temperature flue gas, thereby improving the thermal efficiency of the boiler and saving more money for the enterprise.

Gradually becoming energy-saving is the future development trend of gas-fired boilers, and the main way to achieve effective energy utilization. Changing the way of using traditional energy sources is a good phenomenon of resource recycling. In the future, the resources and environment in the society will be greatly improved. To avoid rapid depletion of resources, technological transformation is very necessary.

Energy-saving equipment is imperative in the future, and the overall design, development and utilization of gas-fired boilers will become more mature with the continuous development of society; for people, the use of more and more energy-saving equipment is The inevitable trend of social development, and for more businesses, the weight of the promotion form of energy-saving boiler products, but also the greatest contribution to the social environment.

In general, the development trend of gas-fired boilers is already very obvious. It is not only more energy-saving and environmentally friendly in terms of material application, but also has a reasonable improvement from the whole device. It not only meets the use mode of the boiler, but also needs to ensure the temperature to the maximum extent and the quality is more stable. A reliable gas boiler is the mainstream trend in the future.

2019-07-02 18:26:19

Boiler "coal to gas", we must first pay attention to these three things

The introduction of new environmental protection laws and boiler air pollution control standards is standard in China's approach to the increasingly strict atmospheric environmental management road. Coal-fired boilers are the main target of environmental protection department management, and coal-fired boiler renovation projects are also being carried out everywhere. Many people will choose to change the coal-fired boiler to a gas-fired boiler. This is not only because the natural gas is cleaner and more environmentally friendly, but the thermal efficiency of the modified boiler will also increase by about 15-20%, which can save the company a lot of fuel input costs.

In addition to the selection of high-quality coal-fired boiler retrofit companies, special attention must be paid to the following items.

1. Precautions for boiler removal
       In order to carry out the transformation of the coal-fired boiler, it is necessary to dismantle some parts of the existing boiler; when removing the boiler, it is necessary to turn off the blower to stop its operation. When the boiler furnace temperature drops to a suitable temperature, stop the boiler induced draft fan, the chain grate, and then The worker enters the furnace from the fire door, removes the original furnace arch of the boiler, cleans the inside of the furnace, and then removes the boiler main engine and auxiliary machine.

2. Furnace renovation considerations
       Furnace is a key point in the work of transforming coal-fired boilers. Through reasonable transformation, the combustion conditions of existing boilers can be improved, so that they not only meet the combustion conditions of new fuels, but also better play an energy-saving role. However, during the transformation, it involves the recasting of the furnace. Therefore, special attention should be paid during this transformation process to keep the rear arch tube of the original boiler away from the center of the flame to avoid high temperature burning.

3. Reconstruction test precautions
       When the transformation of coal-fired boilers is carried out through a series of projects such as furnace reformation and pouring of new boiler front arch and arch, it is necessary to pay attention to the test of the modified boiler. One of the most important tests is to test the water pressure of the boiler body under a certain pressure. Only after passing the test and transformation, the boiler can be put into use.

The above is the three important items that should be paid attention to when the coal-fired boiler is changed to a gas boiler. The quality of the coal-fired boiler transformation company can be modified according to the characteristics of the boiler itself and the needs of the enterprise, and strive to achieve perfect energy-saving and consumption-reducing effect. However, because the boiler has pressure during use, it must be after the transformation is completed. Pay attention to the relevant tests to avoid potential safety hazards.

2019-07-01 18:13:42

What benefits can be added to a company using a gas-fired steam boiler?

The country's emphasis on energy conservation and emission reduction has increased year by year, which has also promoted the vigorous development of gas-fired steam boilers in various industries. Under the premise of environmental protection policies and high-efficiency benefits, enterprises are willing to choose gas-fired boilers that are both energy-saving and highly efficient. In addition to providing sufficient high-temperature steam, gas-fired steam boilers can reduce fuel input costs by reducing the combustion load. The use of gas steam boilers will bring obvious benefits to the company, let us take a look.

1. Economy
       The biggest advantage of using a gas-fired steam boiler is that it can save a lot of fuel costs for the company. It does not need to spend a lot of money to purchase a large amount of coal-carbon fuel. It only needs to use natural gas with good cleanliness to output enough steam. It also does not need to prepare fuel. To store the site, you only need to connect the pipes.

2. Security
       As we all know, natural gas is a very safe and stable, non-toxic, non-polluting, clean-clean fuel. It does not settle on the ground like liquefied gas or gas leaks, and may even burn again causing accidents. Gas-fired steam boilers are the safest choice for gas selection in the process of transporting gases, and are also easily found after leaks, making them the safest method of use.

3. Convenient
       Gas-fired boilers are also very convenient to operate, so they will be favored by all walks of life. Because they use natural gas pipelines, there will be no troubles under continuous operation. It eliminates the tedious work of using coal to transport or stack and clean cinder.

4. Clean
       The reason why the gas-fired steam boiler can be highly evaluated in the market is that it is clean and non-polluting in use, there is no black pot bottom production, and there is no exhaust gas pollution. Therefore, it is the cleanest way to use compared to other boilers.

In summary, FANGKUAI Boiler summarizes the four benefits of using gas-fired steam boilers. The boiler is an important source of power for many enterprises and a valuable energy channel for the state. Domestic professional gas-fired steam boilers can not only save the country's valuable fuel resources, but also use energy-saving and energy-saving to improve the pollution of exhaust gas to the air.

2019-07-01 18:12:07

How to properly maintain the gas steam boiler when it is out of service?

Gas-fired steam boilers are the first choice for many industries such as food processing, paper making, brewing, and chemical production. In the current boiler market, gas-fired steam boiler technology has been very advanced, with obvious advantages of stable operation and low energy discharge and energy saving. If you do not use it for a long time, you must use the correct maintenance method to maintain normal operation during subsequent startups.

The gas steam boiler is not used, the specific maintenance method and the square boiler are carefully analyzed.

1. dry maintenance
       The gas-fired boiler needs to be drained after the furnace is shut down, then the internal dirt is completely removed and rinsed, and the drying in the furnace is kept so as not to be eroded.
       You can use a small fire when drying the remaining water in the furnace, but you should not use a large fire. Also be careful to close all the hand hole pipe valves and place the quicklime pan in the drum.
       If you have not used a gas steam boiler for a long time, check the boiler at least three months. If the quicklime in the crucible is broken into powder, it is necessary to replace the new lime in time to ensure that the dryness protection in the gas steam boiler is not corroded by moisture.

2. wet maintenance
       The specific operation procedure of the wet maintenance is: after the water in the furnace is discharged, the internal dirt is removed, and the treated water is filled into the crucible and then heated to the required temperature; then the gas in the water is completely discharged to the furnace. In addition, close all valves. However, it should be noted that when the weather is very cold, wet maintenance should not be used to prevent the furnace water from freezing and damaging the furnace and cannot be used.

It can be seen that the gas steam boiler can be used in both dry and wet methods without being used. The specific maintenance method should be flexibly selected according to different sites and climatic conditions, which is also for normal use in the future. "Protect the escort."

2019-07-01 18:10:38

What are the precautions when using a condensing boiler?

The condensing boiler can recover the residual heat in the high-temperature flue gas of the boiler and the latent heat part of the condensation of water vapor in the flue gas, thereby improving the use efficiency and reducing the harmful gases in the flue gas, so it will soon become the boiler technology. Future development direction. Driven by this new form, consumers are also buying condensing boilers. What should consumers pay attention to during the life of the condensing boiler?

First, pay attention to cleaning.
       The main function of the pickling inhibitor during the cleaning process is to prevent the metal from being corroded during the pickling process of the condensing boiler. In most cases, many people choose to use the eyes to check whether the cleaning of the condensing boiler is qualified. However, visual inspection can only see if the cleaning is clean, ignoring the most important indicators of cleaning - corrosion rate and corrosion. The corrosion rate and the amount of corrosion are not visible to the naked eye. Therefore, consumers should also understand the measurement method of corrosion rate and corrosion amount; in the cleaning process, use the cycle mode of lowering up or going up or going up and down, installing temporary cleaning circulation pipelines in multiple positions, so that the pots and drums, steam drums, The pyrotechnic tube, the ascending tube, the descending tube and the header can be circulated by the cleaning pump to maintain a balanced concentration of the cleaning liquid, which enables the insoluble matter to be discharged from the boiler after the cleaning is completed, thereby preventing a large amount of dirt from falling off and causing the boiler to burst. Tube "accident.

Second, When one of the following conditions occurs during the operation of the condensing boiler, it should be immediately shut down.
       The water level of the condensing boiler is lower than the lowest visible edge of the water level table; the water supply is continuously increased and other measures are taken, but the water level continues to drop; the water level of the condensing boiler exceeds the highest visible water level of the water level table, and the water level cannot be seen after the water is discharged; all the water pumps fail or water supply In case of system failure, water cannot be supplied to the condensing boiler; the condensing boiler water level gauge or safety valve is completely ineffective; the condensing boiler components are damaged and endanger the safety of the operating personnel.

Therefore, when consumers choose and use the factory direct condensing boiler, not only need to follow the instructions for the operation of the standard, but also need to pay more attention to the precautions in the use of the condensing boiler, so that consumers can use the condensing boiler The process is double-insurance to avoid risks during the operation.

2019-07-01 18:08:16

Special considerations when boiler coal is changed to electricity

“Coal to electricity” has become a very frequent project in the boiler market. Many users will feel confused when they first contact the boiler “coal to electricity” project. In fact, in order to smoothly carry out coal-to-electric boilers, it is necessary to grasp a series of precautions for coal-to-electric boilers; this will help improve the efficiency of boiler operation after successful transformation, and on the other hand, it can be used for boiler operators. The personal safety is increased, and FANGKUAI Boiler will come to introduce three key points in the process of coal-to-electric boilers.

First, pay attention to the planning and laying of circuit lines
       When using electric energy, each line needs to have certain independence between each line. In order to ensure that the electric boiler after the transformation does not have poor contact due to the electric wire problem, it has to have good circuit circuit planning and laying. This requires professional personnel to operate. Coal-to-electric boiler manufacturers with perfect after-sale conditions generally provide excellent services in this regard.

Second, pay attention to the installation of the electric boiler should be stable enough
       The use of boilers has certain dangers. The use of electric energy as energy source after the boiler is changed to coal can greatly increase the safety factor of use. However, when the electric boiler is installed, it is still necessary to ensure the stability of installation and install the foundation. It is also necessary to maintain a certain level of flatness so as not to have a bad influence on the electric boiler, especially in the place connected to the ground, to be adequately prepared to prevent accidents during use.

Third, pay attention to measures to prevent electric shock
       The threat of electricity to people is still relatively large. Once a person has a shocking effect, it is unimaginable. Therefore, a good quality electric boiler must pay attention to the measures to prevent electric shock. This is directly related to the personal safety of the boiler operator. Therefore, it is necessary to give full attention to the conversion of coal to electric boilers. The efficiency of coal-to-electric boilers is very important, but the improvement of efficiency must always be based on safety.

In the process of coal-to-electric boilers, we must carefully master the "coal to electricity" skills, in order to ensure that the electric boiler can play the most important role and ensure equipment and personal safety. The above is the boiler 'coal to electricity' tips that FANGKUAI Boiler will provide for you, and hope to help you carry out the boiler renovation project more smoothly.

2019-07-01 18:05:49

What are the main steps of boiler water pressure test?

When and under what conditions, the hydraulic pressure test, the main steps of the water pressure test, there are many techniques and techniques.

With many years of boiler experience, FANGKUAI Boiler has summarized the following dry goods for your reading and reference.

First, When do you need to carry out boiler water pressure test?
       1. When the newly installed boiler is put into operation.
       2. When the boiler that has been out of service for more than one year is restored to operation.
       3. After the boiler is rebuilt and the pressure components are repaired or replaced, if the number of water wall replacement tubes is more than 50%, the superheater, reheater, economizer and other components are replaced in groups, and the steam drum is undergoing major repairs. Time.
       4. When the boiler is overpressured to 1.25 times working pressure and above.
       5. When the boiler is seriously deficient in water and the heating surface is deformed in a large area.
       6. According to the operation situation, there is doubt about the safety and reliability of equipment operation.

Second, the boiler water pressure test method
       1. The water pressure test should be carried out when the ambient temperature is higher than 5 °C. When it is lower than 5 °C, anti-freezing measures must be taken.
       2. The water used for the hydraulic test should be kept above the ambient dew point to prevent condensation on the surface of the boiler. It may be confused with the inconsistency of water seepage and increase the inspection difficulty. However, it is not suitable for the temperature to be too high to prevent vaporization. (It is difficult to find the leak) and excessive temperature difference stress, generally 20 ° C ~ 70 ° C.
       3. After the water is full, gradually increase the pressure to 0.4MPa, that is, perform a strict inspection. If necessary, tighten the bolts of the flange, manhole door and hand hole cover.
       4. During the water pressure test, the water pressure should be slowly raised and lowered. When the water pressure rises to the working pressure, the pressure should be suspended, check for water leakage or abnormality, and then boost to the test pressure for 20 minutes. There is no drop, that is, it is reduced to the working pressure for inspection.
       5. Any leaks should be recorded to reduce the pressure to atmospheric pressure.

The above is the skill that FANGKUAI Boiler needs to master when comparing the more comprehensive boiler water pressure test. I hope it can help you.

2019-07-01 18:03:45

Where are the main applications of pressureless boilers?

The application of pressureless boilers is very extensive, and it has the advantages of safety and low explosion risk compared with pressurized boilers.

This is because the top of the pressureless boiler is directly connected to the atmosphere and does not withstand the static pressure of the water column of the heating system. It can also be understood as an "open hot water tank".

There are three distinct advantages of a pressureless boiler, mainly:

       1. the operation is absolutely safe and reliable. The biggest advantage of a pressureless boiler is that it is not subjected to pressure during operation and there is no risk of explosion.
       2. Save steel and simplify the process. The pressureless boiler has low material requirements. Except for the furnace, the other uses cheaper ordinary carbon steel materials. The welding process can meet the strength requirements by using fillet welds, which not only saves welding materials, but also simplifies the process.
       3. It is well known that the main scale of boilers is sulfate and silicate. These two types of scales decrease with the evaporation of water and reach a certain level (saturated concentration). The water temperature of the pressureless boiler is kept at around 95 °C for many years, which is not limited by the saturation temperature, and the scale is not easy to form. Therefore, the pressureless boiler also has the advantage of being less prone to fouling, thereby eliminating unnecessary water treatment devices.

 

But this is not to say that the pressureless boiler has no special attention when it is running. On the contrary, the pressureless boiler should pay attention to many details when it is running.
       1. the system water
       The heating system should be equipped with a high-level bearing box, which is located at the high point of the system. The rainwater system is connected to the return pipe and is filled into the system through the tap water pressure. At the same time, the system discharge is normal, so that the system can replenish water. After the high water tank overflows, the water pump cycle is started. Replenish water until the system is full.
       2. Check the activation valve before running
       Firstly, the valve of the boiler inlet and outlet is opened, and the circulating water pump is turned on to make the system circulate and flow to check whether the automatic opening and closing valve is sensitive. Then the circulating water pump stops running for 1-2 hours, paying attention to the water level of the boiler.
       If the water level changes little here, the automatic opening and closing valve of the table name is closed tightly. If the boiler water level rises rapidly after stopping the pump, it indicates that the automatic opening and closing valve leaks seriously and needs to be repaired or replaced in time.
       When the automatic opening and closing valve fails or the leakage is serious, it cannot be ignited.
       3. stop the furnace
       When the pressureless boiler is shut down, the operation of the combustion equipment is the same as that of the pressure-bearing boiler, but it is not limited by the requirement that the boiler water temperature is below 50 °C. If a serious water hammer is caused by vaporization during the shutdown, the boiler water supply can be used to replenish water, and the overflow pipe can be used to reduce the furnace temperature and weaken the vaporization phenomenon.

2019-07-01 17:53:08

What are the methods to improve the thermal efficiency of boilers?

The thermal efficiency is directly linked to the operating cost of the gas steam boiler. It is very important to understand the factors affecting the thermal efficiency of the boiler and to master the method of improving the thermal efficiency of the boiler.

Factors affecting boiler thermal efficiency:
       First, the exhaust temperature of the furnace body. The higher the exhaust gas temperature, the lower the thermal efficiency; and vice versa.
       Second, whether the fuel is completely burned. If the fuel cannot be completely burned, the boiler's thermal efficiency is also very low.
       Third, the heat dissipation strength of the furnace wall. The stronger the heat dissipation of the boiler wall, the lower the thermal efficiency; and vice versa.
       Fourth, the amount of scale in the furnace. The more scale, the worse the heat of the furnace and the lower the thermal efficiency.

Measures to improve boiler thermal efficiency:
       First, reduce the heat loss of smoke exhaust
       The temperature of the smoke is a comprehensive parameter for the design, operation and health of the boiler, and is the main reason affecting the thermal efficiency of the boiler. The exhaust gas temperature of ordinary gas boilers is around 220 °C. After calculation, the thermal efficiency will decrease by 1% for every 10 °C increase in smoke temperature.
       FANGKUAI Boiler invested a lot of energy and money to reduce the heat loss of smoke exhaust. The boiler adopts advanced condensing technology to make full use of the residual heat of flue gas. The exhaust gas temperature can be reduced to about 50 °C, and the thermal efficiency is also increased to more than 107%.
       Second, reduce fuel incomplete combustion heat loss
       Sometimes, due to the poor heat of the furnace or the use of poor quality burners, the fuel cannot be fully burned, which reduces the thermal efficiency and requires a large amount of gas cost.
       In solving this problem, the full premixed combustion technology is used, and the natural gas and air are accurately adjusted before entering the burner to achieve an ideal state, so that the fuel is burned sufficiently and uniformly, and there is no need to worry about heat loss.
       Third, the furnace wall heat dissipation
       The problem of heat loss is unavoidable when the boiler is running. This is the physics conclusion.
       We set up double-layer closed structure in the front and rear smoke boxes, more than 95% of the welding uses intelligent automatic machinery, and each layer is filled with multi-layer centrifugal glass wool for thermal insulation treatment, without ignoring every detail, to a great extent, reducing Loss of heat.
       Fourth, the amount of scale in the furnace
       Boiler feed water contains various impurities and calcium and magnesium ions, which will form scale when operated for a long time. The thermal conductivity of the scale is very low. When the surface is fouled by the heating surface, the thermal resistance increases, the exhaust temperature of the boiler rises, and the heat loss of the exhaust gas increases. In general, 1 mm of scale on the heated surface will increase the heat loss of the exhaust by 2%-4%.
       We use high-quality soft water treatment equipment, operate the boiler feed water softening treatment device in strict accordance with the process, control the boiler feed water quality, and use the patented technology--scale online monitoring, real-time control of scale status, and regularly remind users to the boiler as a whole. Check and clean.

The above is the four methods provided by FANGKUAI Boiler to improve the thermal efficiency of gas-fired boilers. You can check the boilers by referring to the above methods. If you have any problems with your boiler, please contact us immediately and our technical engineers will provide you with a solution for free.

2019-07-01 17:48:52

What is the difference between gas boilers and coal-fired boilers?

Both coal-fired boilers and gas-fired boilers are relatively common types in the boiler market in recent years. Although they are more consistent in their comprehensive performance, they have specific combustion methods, combustion products, and specific operational requirements and workflows. A big difference, after ample market research, Fangfeng Boiler summed up the main characteristics of coal-fired boilers and gas-fired boilers.

First, the way of burning.

Most of the coal-fired boilers use the layer-fired combustion method. The coal passes through the coal-feeding machine to transport the chain grate plane, and the combustion process is completed in the furnace. Most of the gas boilers use chamber combustion, and the natural gas is mixed with the air in the burner in a predetermined ratio, and then injected into the furnace through the nozzle to complete the combustion in the furnace state.

Second, the automatic control of the boiler.

Coal-fired boilers are limited by factors such as coal type, coal seam thickness, blast volume, air volume, air volume distribution and grate speed. It is difficult to automatically adjust boiler operating parameters according to load. However, high-quality gas boilers are less affected, and only the size of the burner can be adjusted according to the load, and automatic control is easy.

Third, the combustion products.

Coal is mainly composed of C, H, O, N and other elements, ash and moisture, but not the surface of these components, but a more complex compound. After the coal is burned, heat is released, and sulfurized oxygen gas is generated, which is discharged into the atmosphere by the flue gas. These gases are very polluting the environment and cause harm to humans. The natural gas used in gas boilers is mainly composed of methane gas and contains a small amount of non-hydrocarbon gas. Generally, it does not contain water and ash. Therefore, it mainly produces carbon dioxide and water after combustion, and releases a large amount of heat. Compared with coal, Hazardous substances should be significantly reduced.

The above is the difference between the understanding of the characteristics of coal-fired boilers and durable gas-fired boilers. We can understand that coal-fired boilers and gas-fired boilers are used in many specific ways and work contents due to different fuels. There are many differences, so in the process of choosing the two, we must choose according to the needs and convenience of operation.

2019-06-28 18:06:38

Preparations to be done before installing a natural gas boiler

With the release of various coal-fired boilers banned policies, all provinces and cities across the country have begun to carry out clean emission conversion projects for boilers. Natural gas boilers stand out among many boiler types with their unique clean and environmental advantages, and are favored by users in many industries such as food, chemical, medical, heating, construction, hotel, and paper. After purchasing a natural gas boiler, how to properly install the boiler is a worry for many users, because once the boiler is mistaken during the installation process, it will cause various unintended consequences.

Preparations for the installation of natural gas boilers are indispensable and must be carefully prepared before installation. So, what are the preparations for the installation of natural gas boilers?

First, determine the installation location of the boiler in advance.

The choice of boiler installation location should be taken to avoid these locations: poor ventilation, near flammable and explosive materials. Only when installed in a place with good ventilation and away from inflammable and explosive materials, can the boiler installation ensure peace of mind.

Second, the various installation procedures are completed in advance, and communicate with the management department.

According to the relevant regulations of the steam boiler safety supervision regulations, the unit using the boiler should be required to go through the registration procedures for the installation of natural gas boilers in accordance with the procedures before installation. The boiler user needs to communicate with the local boiler supervisory agency before installation and assign a professional to be responsible for the supervision of the installation work.

Third, contact the boiler installation related installation technicians in advance.

Installation of a natural gas boiler to install such a technical activity must be done in advance by contacting a professional and trustworthy boiler installer. And the installer must carefully understand the steps of installing the natural gas boiler and related precautions before installation. Therefore, contact the installation technicians of the boiler installation in advance before installation. Users should not start the operation by themselves.

If a worker wants to do something good, he must first sharpen his tools. The installation of natural gas boilers is also the same. Before the installation, people must pay special attention to the preparations in advance, and perfect preparation work can better complete the boiler installation work quickly and effectively. The use after installation is also more secure, and if there are any problems, you can find relevant personnel to repair in time.

2019-06-28 18:04:50

How big is the radius of damage of boiler explosion?

If the boiler is used in some bathing places, when the boiler is short of water, it will enter the water urgently, and the water will evaporate instantaneously, and the boiler will expand vigorously in a short time. If it really explodes, it may be caught by bricks and other things 20 meters away, and the damage radius is about 10 meters.

If a large industrial boiler explodes, and the boiler room is collapsed, the factory area will also have a certain extent of damage, which is an extremely serious disaster.

Nowadays, boiler explosion accidents have been rare. The more serious the boiler safety measures are, the more stringent the safety valves and fire protection devices will be. Generally, there are relatively many small boiler accidents. This is mainly because the boiler manufacturing qualification of some manufacturers of small boilers is not high, and the larger manufacturers or manufacturers with A-class boiler production qualifications are responsible for the safety of boilers. Very strict, they will strictly comply with the relevant national regulations to produce boilers that meet the standards.

The use unit of the boiler should also reasonably select the location of the boiler room in accordance with relevant regulations, so as to avoid important facilities and residential areas, prevent problems before they occur, and regularly check the operation of the boiler to check for potential safety hazards in a timely manner.

2019-06-28 18:02:11

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