In addition to the quality of the electric boiler and the quality of the after-sales service, the electric boiler should also pay attention to some operating specifications when using it, so as to avoid the harm to the person and property more effectively.

If the electric boiler is used for a long time, it will age. How to maintain the electric boiler? Fang Boiler professional boiler technical engineer, to take you to understand the maintenance of electric boilers. Generally, electric boilers must be repaired and maintained to a certain extent within 1-2 years. This will help the normal operation of electric boilers. Regular maintenance is also the basic condition for ensuring normal operation of electric boilers.

1. When maintaining and maintaining the boiler, you must pay attention to: cut off the power supply and relieve pressure.

2. The burner should be removed from the boiler body every two months on average, and the foreign matter such as carbon deposits and dust should be carefully removed. The photocell is wiped once a month on average, and the fuel filter should always be clean and well filtered. Carefully clean the filter inside the pump. Be careful not to damage the gasket. The burner must not be idling without oil to avoid damage to the pump.

3. The water level gauge should be kept clean at all times, and the cleaning valve should be opened once a day to ensure the water level is clear.

4. The safety valve is pulled once a day to prevent rust failure.

5. After the maintenance work is completed, check whether the tools, materials and accessories are complete, and prevent these accessories from remaining in the space such as the furnace.

6. Dedicated personnel will be removed from the work site after passing the inspection; then the maintenance records will be made for later enquiry work.

The correct water circulation protection measures 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.

The design of circulating water system in gas hot water boiler room should also meet the following requirements:
       1. 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.
       2. 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.
       3. 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.
       4. The lower part of the system and the low recess should be provided with a drain pipe and a drain valve.
       5. 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.
       6. 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.

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 FANGKUAI 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.

The various components of the electric steam boiler are made of different materials.
       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.

The convection pipe is the convection heating surface of the gas boiler, which is used to absorb the heat of the high temperature flue gas and increase the heating area of ​​the boiler. The performance effect of the convection tube bundle - endothermic, is related to the flue flow rate, the arrangement of the tubes, the way the flue gas is flushed, and is one of the most important components of the gas boiler.

The water wall tube is laid on the inner wall surface of the furnace, and is mainly used for absorbing the flame in the furnace and the radiant heat emitted by the high temperature flue gas, and has the function of cooling and protecting the furnace wall.

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
       l. 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 protection measures 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.

The design of circulating water system in gas hot water boiler room should also meet the following requirements:

1. 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.

2. 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.

3. 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.

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

5. 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.

6. 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.

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.