The high thermal efficiency directly affects the operating cost of the gas boiler, understands the factors affecting the thermal efficiency of the boiler, and masters the method of improving the thermal efficiency of the gas boiler, which is very important.

First, factors affecting the thermal efficiency of gas boilers
       1. The exhaust temperature of the furnace body. The higher the exhaust gas temperature, the lower the thermal efficiency; and vice versa.
       2. Whether the fuel is completely burned. If the fuel cannot be completely burned, the boiler's thermal efficiency is also very low.
       3. Heat dissipation strength of the furnace wall. The stronger the heat dissipation of the boiler wall, the lower the thermal efficiency; and vice versa.
       4. The amount of scale in the furnace. The more scale, the worse the heat of the furnace and the lower the thermal efficiency.

Second, measures to improve the thermal efficiency of gas boilers
       1, 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%.
       2, 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, FANGKUAI Boiler uses full premixed combustion technology. The natural gas and air are precisely adjusted before entering the burner to achieve the ideal state, so the fuel combustion is sufficient and uniform, and there is no need to worry about heat loss.
       3, 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.
       4, 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.

Some residential heating boilers with long residence time generally use normal pressure or pressure hot water boilers, but most of these boilers have the defects of complicated system, high operating cost, easy scaling, and serious influence by oxidation and corrosion. In recent years, vacuum hot water boilers have been widely favored by the heating industry, and because of their good safety performance and low floor space, they are very suitable as building heat sources.

The vacuum hot water boiler produced by FANGKUAI Boiler has the following advantages:

1. The boiler has good safety performance. The inner body of the vacuum hot water boiler has been kept in a negative pressure operation state, and even if there is a sudden failure, it will not cause a dangerous situation of outward explosion.

2. The actual thermal efficiency is extremely high. Due to the small heat capacity of the boiler, the heating time is short, and the heat loss of start-stop is low. At the same time, the high-quality insulation material is used to reduce the heat loss to an extremely low level, and the actual running heat efficiency is greatly improved.

3. Long service life. The boiler is kept in closed operation. The heat medium water is injected once before leaving the factory, and is treated with deoxidation and softening. It does not need to be replenished in the later stage of use, and it will not scale and ensure the long-term normal use of the boiler.

4. Little impact on air pollution. The vacuum hot water boiler produced by Fangkuang boiler adopts advanced combustion technology such as full premixing and FGR to greatly reduce the emission of harmful substances such as nitrogen oxides (NOx). The use of condensers and economizers makes full use of flue gas waste heat. Not only does it reduce the exhaust gas temperature, but also reduces NOx emissions, which is extremely environmentally friendly.

5. Small footprint. The vacuum hot water boiler produced by FANGKUAI Boiler adopts Ultagen high-quality heat exchange component-winged tube, which increases the heat exchange area by 5 times compared with the ordinary boiler heat exchange tube, the heat exchange efficiency is greatly improved, and the overall volume of the boiler is also reduced. It is the best choice for many shopping malls, hotels, schools, enterprises and institutions.

How does gas-fired boiler combine energy-saving, environmental protection and intelligence? FANGKUAI Boiler has invested considerable capital and energy, and has diligently researched and introduced a boiler unit that meets the above conditions—gas module boiler.

Gas-fired boiler means that multiple gas-fired boilers are set by the joint control system, according to the dynamic parameters such as the set heating temperature curve, and with reference to the indoor and outdoor temperature difference changes or their own demand changes, intelligently carry out the boilers that automatically judge the departure and shutdown. The number of running units can achieve near-unattended work mode and avoid waste of resources.

FANGKUAI Boiler summarizes several purchase criteria for gas-fired boilers, so that you can understand this type of boiler more comprehensively and choose it according to your own needs.

First, the operating costs
       The “module” is equivalent to splitting a single large boiler into several small boilers. The “simple parallel combination” of the quantity can realize the demand of different steaming tons. The modular design structure determines the three characteristics of the boiler.
       1. Each boiler is spared for each other. Once a single boiler has a sudden failure, other boilers can be started immediately, and the impact on heating is very small.
       2. Capacity expansion is good, many office buildings in different seasons, the demand for heating and other domestic heat load will change, the choice of module boiler can solve this situation perfectly, by increasing or decreasing the number of boilers at any time, to achieve a smaller investment Meet the needs.
       3. The requirements for the infrastructure of the boiler house are not high, which can greatly reduce the capital construction investment costs.

Second, whether low nitrogen emissions
       Many office buildings are located in the central area of ​​the city. With the stricter air pollution emission standards in China, many cities have imposed coal-free or ultra-low-nitrogen emission requirements. The gas-fired boilers produced by Fangkuo can use nitrogen-emitting emissions of as low as 18 mg/m3 by using patented technology, which meets the boiler emission standards in all regions of China.

Third, the safety index
       The centralized office building is generally densely staffed. Once a sudden disaster occurs, the consequences are unimaginable.
       FANGKUAI boiler can be equipped with intelligent remote monitoring cloud service system for each boiler. The professional supervisors observe the operation of the fast boiler in China within the whole day. Once an emergency situation is discovered, the early warning device is remotely activated and the user is notified online. Kill the danger in the cradle.

The above is what you need to pay attention to when selecting the gas module boiler for the office building provided by FANGKUAI Boiler. I hope that you can better choose the boiler suitable for your enterprise. If you have any other questions about the boiler, you can call our technical engineer's hotline directly and we will do our best to help you.

In recent years, more and more users have begun to use electric heating boiler equipment. On the surface, people are beginning to realize the importance of environmental protection and energy conservation. The electric boiler produced by Fangkuang boiler is clean and environmentally friendly, pollution-free, noise-free and fully automatic because it has no combustion chamber and chimney. It is widely loved by users.

1. In order to prevent electrochemical corrosion, cathodic protection measures must be taken.

2. For the sewage treatment of the electric boiler, the sewage at the bottom of the boiler can prevent the condensation of the smoke. Flue gas condensation is caused by moisture in the flue gas (diesel or natural gas) and the temperature of the flue gas is too low. Some of this moisture is removed from the chimney, some is absorbed by the chimney wall, and the rest is deposited at the bottom of the chimney.
 The amount of water produced is affected by the following factors: the flue gas temperature (to achieve 91% thermal efficiency, the flue gas temperature needs to reach 170 °C), the total surface area of ​​the chimney, the material of the chimney and the insulation of the chimney. Burner repair. Maintenance of electric steam boilers and burners, after steam supply for maintenance. Because the products of combustion corrode the boiler and clean up the carbon deposits, the combustion products must not be left in the boiler for too long.

3. The necessary content for electric boiler cleaning.
 When using the electric boiler, first open the burner door, remove the rear outer casing panel, unscrew the screw on the cleaning side of the electric boiler, clean the gas pipe with a wire brush, and clean the combustion chamber with a soft brush.
 The electric boiler removes the residue from the boiler, screws the cleaning port, closes the burner door, and checks whether the seal is complete.

4. If the electric boiler is installed in an area where the temperature is below 0 °C, the following protective measures must be taken. If the electric boiler room is outdoors, the indoor temperature is lowered to 15 ° C or 18 ° C, so that the electric boiler runs all day. If there is no one in the room for a long time, the water in the electric boiler should be drained and the boiler should be stopped.

First, the cause of blasting water wall tube blasting
       1. The material is unqualified and the installation does not meet the requirements of the specification. If the pipe wall is stratified, the weld quality does not meet the grade requirements, and there are remnants in the pipe. Causes the tube wall to be partially overheated and burned out.
       2. The quality of the feed water does not meet the standard requirements, causing fouling of the pipe wall structure and affecting heat transfer. Causes the tube wall temperature to overheat and blast.
       3. The fly ash is seriously worn, and the thickness of the pipe wall is reduced.
       4. The fire rises too fast or the furnace is stopped too fast, and the tube is unevenly heated and the weld is broken.
       5. Boiler explosion may occur due to excessive boiler load, uneven combustion and serious coking outside the pipe.

Second, prevent explosion control measures
       1. Before the installation, the pipe should be strictly re-examined, and the welding must have a welding procedure guide, and the welding quality meets the design requirements. After the pipeline is installed, pass the ball through the ball to ensure that the pass rate reaches 100%.
       2. Strengthen water quality management, soften water once per shift and meet water quality standards, regularly check scale content and eliminate it, and regularly discharge pollutants.
       3. The water wall tube and the convection tube should be inspected regularly. It is found that the tube with deformation or thinning should be replaced in time. At the same time, attention should be paid to the quality of the inspection, which must meet the requirements of the specification.
       4. The boiler should not be overloaded (specified limit), pay attention to the combustion process in the furnace, and ensure that the combustion is uniform and stable.
       5. Pay attention to the pipe coking situation, to achieve timely focus and pay attention to leakage.

The correct water circulation of the gas hot water boiler can effectively prevent the water vaporization and water hammer and other bad phenomena from occurring after the water circulation pump suddenly stops. Based on years of industry experience, FANGKUAI Boiler will summarize the protection measures for the water circulation of gas hot water boilers for your reference.

1. Between the inlet and outlet pipes of the circulating water pump, set the bypass pipe of the check valve, the pipe diameter should be close to the mother pipe, and the cross-sectional area of ​​the bypass pipe should not be less than 1/2 of the cross-sectional area of ​​the parent pipe; check valve The direction of the water flow should be consistent with the direction of the water flow of the pump.

2. A heavy hammer type micro-opening safety valve is arranged on the inlet pipe section of the circulating water pump, and the overpressure drain pipe can be connected to the open water supply tank or the drainage ditch.

3. Each boiler outlet pipe shall be equipped with a shut-off valve or gate valve. The boiler inlet and supply pipes shall be provided with a shut-off valve and a check valve.

4. When the hot water boilers are operated in parallel, a regulating valve shall be installed on the inlet pipe of each boiler so that the deviation of the outlet water temperature of the parallel boiler does not exceed 10 °C.

5. The gas collecting and exhausting devices shall be installed at the high point of the boiler outlet pipe and the gas gathering place. The size of the exhaust valve shall not be less than DN20.

6. The lower part of the system and the low recess should be provided with a drain pipe and a drain valve.

7. The decontamination device should be installed at the position where the hot water system return water main pipe is convenient for cleaning. There should be a pressure gauge and a closing valve before and after the decontamination device, and there are bypass pipes 1 to 2 smaller than the main pipe.

8. There should be multiple water heaters and water collectors in the boiler room for hotspots. The water separators and water collectors should be equipped with drain valves, thermometers, pressure gauges, etc.

Gas-fired hot water boilers may malfunction due to human error or the boiler itself during operation. In the event of a failure, we must deal with it in time to prevent further damage. The Fangkuai boiler summarizes four post-fault repair methods for both shutdown and inspection, for your reference.

First, stop the furnace
       1. Do not stop the pump immediately when the furnace is shut down. The pump must be stopped when the boiler outlet temperature is below 50 °C. At the same time, the water supply valve and the hot network return valve should be turned off, and the pot water can be discharged before inspection and repair can be carried out.

Second, check
       1. Before entering the boiler, all the water in the boiler must be drained, and the sewage outlets are all open. The manhole on the drum, the hand hole on the header must be opened, so that the air can be convected for a period of time before entering the internal work.
       It must be noted that when someone inside the drum is working, there must be someone under the drum. 2. Before entering the combustion chamber or working in the flue, ventilation, anti-virus, fire prevention and explosion-proof measures must be taken. The flue gates connected to the main flue or other flue of the operating boiler are closed tightly.
       3. Use a safe voltage when lighting. If the drum and the flue are damp, the lighting voltage must not exceed 12V. If it is dry, the lighting voltage must not exceed 36V. And to have proper safety measures, it is strictly forbidden to use open flame lighting.

Explosion is one of the more serious accidents in gas-fired hot water boiler accidents. It will cause serious damage to equipment, heating systems and buildings, and it will cause great casualties and adversely affect social and economic development. Regarding the cause of the explosion of the gas hot water boiler, FANGKUAI Boiler summed up the following aspects and proposed an effective treatment method.

First, the cause of the explosion
       1. Design and manufacturing problems
       Unreasonable boiler design results in uneven distribution of flow in each water circulation loop. The thermal deviation is too large, and the structure has fillet welds, squares, flat plates, and steel materials that do not meet the requirements; the manufacturing process for manufacturing and repair is not good. If the welding quality is unqualified, the boiler will be broken.
       2. Overpressure
       The operating pressure of the boiler exceeds the permissible working pressure, and the compressive stress (internal pressure) of the steel plate increases, which exceeds the strength limit of the steel plate and causes cracking. The main reason is that the safety valve is malfunctioning, the pressure gauge is faulty, and the console meter indicates an error.
       3. Overheating
       The steel plate is overheated and burned, and the main cause is that the scale is too thick or there is grease or other debris in the pot water, which blocks the heated surface.
       4. Corrosion
       After the inner and outer surfaces of the steel plate are severely corroded, the thickness is reduced, and the strength of the steel plate is insufficient to cause cracking.

Second, the solution
       1. The following measures should be taken for the defects in the design: first, the design is reasonable; second, the materials are strictly controlled; third, the correct manufacturing process specification and process card (including repair); fourth, the establishment of necessary rules and regulations; The fifth is to improve the quality and responsibility of operators and managers.
       2. Strictly prevent overpressure. To ensure the sensitivity and reliability of the safety valve, automatic draining is required once a day. The problem should be dealt with in a timely manner, and a standard pressure gauge should be installed for comparison.
       3. Prevent overheating. Effective water treatment equipment must be configured and strict rules and regulations must be established. The boiler should be free of scale or scale and no grease. When the boiler is out of service, check the scaling. If there is scale, it must be cleaned up in time.
       4. Prevent internal corrosion. For larger capacity hot water boilers, thermal deaeration or chemical deaeration is used. In addition, check the internal and external corrosion conditions. Repair means such as replenishment or excavation according to the degree of corrosion (there must be a technical plan approved by the unit's chief engineer and reported to the local boiler supervision department).
       5. In order to prevent boiler explosion, the boiler should be inspected regularly. At the same time, the boiler management department must formulate effective measures. The operators and management personnel must strictly implement the safety code for stopping the boiler after minor accidents.

The water-cooled wall of the water tube boiler is placed on the inner wall of the furnace, and is arranged closely adjacent to the furnace wall, and is arranged substantially in a vertical manner. For boilers below subcritical pressure, the water wall is mainly used to absorb the radiant heat of the high temperature flame in the furnace, so that the working medium (water) entering the pipe generates steam. In the furnace design, in addition to meeting the fuel combustion conditions, the heat absorption of the water wall is sufficient to reduce the outlet temperature of the furnace to the softening temperature of the fuel residue to prevent coking of the heated surface of the furnace outlet.

First, the light pipe water wall
       The inner and outer walls are composed of smooth seamless steel tubes and have no other features.

Second, the pin type water wall
       For furnaces burning low-volatility fuels, in order to maintain a high-temperature flame in the combustion zone to facilitate fuel combustion, it is necessary to lay a certain number of insulation zones on the furnace wall of the burner arrangement area. The refractory belt is generally welded with a refractory material such as chrome ore on the water wall tube.

Third, the internal thread tube water wall
       For the subcritical pressure natural circulation and control cycle boiler, in order to prevent the membrane boiling from prematurely occurring, the heat transfer of the steam-water mixture is delayed, and the high heat load area of ​​the burner is arranged in the furnace, and the internally threaded tube is often used instead of the smooth inner light tube. To make water walls.

Fourth, membrane type water wall
       Most modern boilers use this structure, and so are the FANGKUAI Boiler same. This is because the water wall of the boiler of this structure is a continuous steel structure, avoiding the contact between the brick wall and the prefabricated (refractory) material and the flame surface, reducing the heat load and weight of the brick wall and the heat insulating material, and facilitating the sealing of the furnace ( Reduce air leakage). At the same time, a smooth and low temperature metal surface is beneficial to reduce the possibility of coking in the furnace.

An electric steam boiler is a device that converts electrical energy into heat energy by electric heating, thereby causing the boiler to complete the reaction and output steam to the outside.

So, what are the precautions for users when purchasing electric steam boilers for the first time? Fang fast boiler for your science.

First, thermal efficiency
       The thermal efficiency is related to the operating cost of the electric steam boiler. The thermal efficiency of the electric steam boiler developed by FANGKUAI can reach more than 98%, which is about 20% higher than the thermal efficiency of the ordinary electric steam boiler on the market, so it is more energy-saving and economical.

Second, the steam time
       The steam outlet time refers to the time taken from the start-up of the machine to the generation of steam that meets the temperature requirements. The shorter the time, the more energy-saving. The steaming time of a typical steam boiler is about 30 minutes. The electric steam boiler produced by FANGKUAI boiler only takes 30 seconds to produce steam, which saves the company a lot of operating costs.

Third, energy saving and environmental protection
       Many central cities in China implement air pollutant emission standards of 30 mg/m3, which is a challenge for many boilers. The electric steam boiler has no combustion chamber and no chimney, and does not need to consider the heat loss problem. At the same time, it has the characteristics of clean and pollution-free, and is more energy-saving and environmentally friendly.

Fourth, safety performance
       The safe and stable operation of the equipment is undoubtedly a magic weapon that makes the enterprise more secure and more worry-free. The square electric steam boiler can adopt modular installation structure, and the customer can flexibly adjust the use of single or multiple devices according to the actual steam consumption, ready to use, simple maintenance and space saving. In addition, the boiler also adopts the PLC intelligent control system designed and developed by FANGKUAI, which is fully automatic and runs without special personnel, saving labor costs.

Of course, there are still many problems to be aware of when purchasing an electric steam boiler. The above aspects are among the more important factors. Combining the above factors, we can judge the quality of the electric steam boiler and help you purchase it for your own business. The boiler used.

Good maintenance can improve the efficiency of heat exchange in electric boilers and reduce electricity consumption. Through experimental comparison, the electric boilers that have been cleaned and maintained under the same conditions have a heating rate of about 25% faster than that of electric boilers that have not been cleaned and maintained. That is to say, the electric boiler can be cleaned after the original foundation. Save about 25% of the power resources.

At the same time, it can extend the service life of electric boilers. Descaling by internal cleaning can effectively reduce the load on the main components such as pumps and heat exchangers, thus making the boiler run more smoothly and prolonging its service life. If the boiler is cleaned and maintained once every two years, the service life of the equipment can be extended for 3-5 years.

Electric boiler maintenance method
       First of all, we must ensure that the use environment of electric boilers should be in a dry, non-moisture environment. If the humidity is too large, it will easily lead to the occurrence of electricity in the electric boiler, causing electrical disasters.

First, before the maintenance of the electric boiler, we must first cut off the power supply, so as to ensure the safety of subsequent operations.

Second, the electric boiler is mainly composed of the body, the electric control box, the control system and various power supply cables. The maintenance and maintenance of these components should be controlled once every two months. For electric boiler burners, it is necessary to remove some foreign matter such as dust every two months during use; Wipe the test once a month; in addition, the filter inside the oil pump should be checked regularly. But be careful: do not damage the sealing pad to avoid damage to the oil pump.

Thitd, during the use of the electric boiler, the safety valve should be moved once a day to prevent rust from losing its original function.

Forth, after all inspections are completed, all tools and materials need to be placed, placed in the designated location, and then safely recorded for later enquiry.

The boiler price is the first consideration for every user when purchasing equipment, which makes the cost investment clearer and clearer. The price of natural gas boilers on the market is now different, and many users will have a feeling of fog when shopping. This is mainly due to regional factors, equipment materials, production processes and other reasons caused by different prices.

What is the best way to buy a good gas boiler?

First, the manufacturing materials
       Reasonable design structure, higher quality and more corrosion resistant configuration parts are the main factors that determine the quality and service life of the boiler. The internal parts of FANGKUAI Boiler gas boiler are collected from domestic and foreign high-quality brands, and both quality and post-maintenance services have great protection. Such as: Italian famous brand Liya Road burner, Grundfos pump, Siemens electric control, and so on.

Second, the service
       Whether it is pre-sale, sale or after-sales service, it has a very important impact on the business. Professional and patient pre-sales consultation, good communication and cooperation between the two parties during the cooperation process, and daily maintenance and overhaul of the boiler operation will bring different experience to the users. FANGKUAI Boiler always believes in the business philosophy of “observing and thinking from the perspective of the user”. In the pre-sales consultation, sales cooperation and after-sales remote monitoring system, 120% of the energy is invested to provide users with high quality boiler products. diligent.

Third, the brand
       I have to say that the influence of the brand is endless. To build a good reputation, to become a boiler brand in the hearts of users, is the soft power of a boiler enterprise. The good word-of-mouth is the most authentic feedback that countless users have after using the boiler. It also depends on the boiler's own quality.

After reading this article, I believe that everyone has some control over the price of natural gas boilers. If you have not yet determined what type of natural gas boilers to buy, you can directly consult the customer service on this site to find out the differences between the different brands of equipment. We will connect with professional technicians to help you select a natural gas boiler that is more suitable for your business.