How to purchase a gas boiler with excellent quality? Customers can refer to the following two aspects.

First. Thermal efficiency and boiler capacity
       Compared with the traditional boiler, the high-quality gas boiler is composed of ND steel with a thickness of 28mm, which has stronger heat transfer and corrosion resistance, so the thermal efficiency is also improved. The customer can carefully observe the boiler material during the selection process to confirm whether the performance meets the requirements. In addition, you can also pay attention to boiler capacity, design structure, water flow in the boiler, water level fluctuations and so on. High-quality low-nitrogen boilers are inevitably advanced in thermal efficiency and capacity technology.

Second. The operability and noise intensity
       If you have selected a low-emission, high-heat efficiency gas boiler, you can turn your attention to the boiler operation. The gas boiler has an intelligent control system that can be docked with the intelligent control platform to achieve fully automatic operation. At the same time, attention should be paid to the noise intensity generated during the operation of the boiler, and the boiler with low noise intensity can be included in the selection range. In addition, it can also be comprehensively analyzed through various factors such as the production scale of the boiler enterprise and market reputation.

FANGKUAI Boiler hopes to help you through this article. If you are still confused about gas boilers, you can contact Fangfeng Boiler directly to talk to professional boiler technical engineers.

Low-nitrogen hot water boilers are widely used in many residential buildings, mainly for winter heating and hot water supply. The hot water boilers with low nitrogen technology have lower exhaust gas temperature and less harmful substances, which guarantee people's living environment and health. However, in order to further ensure the safety of its operation, the following points should be observed when operating low-nitrogen hot water boilers in residential areas.

First, we must control the water temperature and water speed
       When the low-nitrogen hot water boiler for residential use begins to operate, the temperature inside the boiler and the components is the same as the ambient temperature. As the boiler burns, the temperature begins to rise; but because the boiler wall is thicker, the outside is The temperature rises more slowly, causing a temperature difference between the inner and outer walls. Moreover, the lower the thickness of the low-nitrogen boiler manufacturer, the greater the temperature difference between the inside and the outside will be. If the water temperature rises, the inside of the boiler may be deformed to form a crack. Therefore, the low-nitrogen boiler manufacturer emphasizes that in order to avoid this situation, the water supply speed and the water temperature should be controlled so that the temperature of the inner and outer walls of the boiler can be uniformly increased to protect the boiler from damage.

Second, we must control the speed of heating up
       In the process of starting the combustion of the low-nitrogen hot water boiler, the internal pressure will increase as the temperature rises, so the two are simultaneously performed, and in the process of gradually increasing the pressure, not only the thick-walled steam drum The temperature of the inner and outer walls will produce a difference, and other parts will also generate thermal stress due to this change, which is unfavorable for the maintenance of low-nitrogen hot water boilers. Therefore, the professional low-nitrogen hot water boiler manufacturer - Fang Kuai Boiler reminds everyone that It must be controlled and the thermal stress should be reduced as much as possible to avoid adverse effects on critical components such as pressure pipes and flow orifices.

Third, we must properly adjust the speed of the boost
       In the process of rising pressure inside the low-nitrogen boiler, it is necessary to go through several different stages, and the rising rate of the corresponding saturation temperature of the working medium is different for each certain unit of pressure, and the lower the pressure, the unit pressure is raised. The corresponding rate of increase in saturation temperature is greater and as the pressure increases, the saturation temperature of the water rises less and less. Therefore, the domestic professional low-nitrogen boiler manufacturer introduced that the boosting speed is very slow at the beginning, but when the pressure is relatively high, the speed of the boosting can be appropriately adjusted because the pressure rise and the temperature increase have mutual influence. Therefore, it is not possible to carry out the adjustment alone, and it is necessary to comprehensively consider the operation.

In addition to providing sufficient high-temperature steam, gas-fired steam boilers can reduce fuel input costs by reducing the combustion load. What benefits will the use of gas-fired boilers bring to business users?

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.

Maintaining a safe and stable operating state of the gas hot water boiler will enable the boiler to exert more functions on this basis. So, how do you need to ensure the safety of gas-fired hot water boilers?

1. Before the work, carefully check whether the water supply, drainage, gas supply pipe accessories, safety valve, pressure gauge and water level gauge of the gas hot water boiler are sensitive, and the safety can be confirmed before the work can be carried out.

2. When you are in the water, you should use both hands to operate. First open the water gate with one hand, then open the water valve of the water injector with the other hand, and the water naturally flows into the furnace. When stopping, the valve should be closed first, then the water door should be closed. When the valve is opened and closed, the face must be avoided to avoid the accident caused by the soda.

3. During the operation of the gas hot water boiler, it is necessary to pay attention to check the various parts and observe whether the pressure and water level are within the normal range. The furnace workers are not allowed to leave the post without permission. When working in night shifts, avoid sleeping and not allowing sleep, so as to avoid accidents. When the boiler is discharged, each shift must be carried out once. The water level should be properly adjusted before the discharge, which is slightly higher than the normal water level by 2/3, and then discharged.

4. The water level gauge must be flushed once per shift. When flushing, follow the prescribed procedure, first close the water valve, open the drain valve, flush the steam valve, then pay attention to whether the steam is blocked; then close the steam valve, then pay attention to whether the water is blocked. When flushing the water valve, there is water and steam, and the time is a little longer to ensure that the fake water level is not available. Hot gas water boiler fuel must be inspected for safety to prevent the presence of explosive substances in the fuel to prevent explosion hazard.

5. Always check the temperature of the mechanical equipment and the motor casing. If the machine is faulty or the motor heat exceeds 60 degrees, stop the test immediately. When the gas hot water boiler is in normal operation, the steam pressure shall not exceed the specified working pressure, and the safety valve shall be inspected once a week on average.

Compared with pressurized hot water boilers, atmospheric hot water boilers have the advantage of safety and low explosion risk. This is because the top of the atmospheric 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".

But this is not to say that there is no special attention when the atmospheric hot water boiler is running. On the contrary, the 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 atmospheric hot water boiler is shut down, the operation of the combustion equipment is the same as that of the pressurized 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 can be used to replenish water, and the overflow pipe can be used to reduce the furnace temperature and weaken the vaporization phenomenon.

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.