horizontal Industrial gas-fired steam boilers

Boiler efficiency calculation formula

Definition of Boiler Efficiency is “The percentage of the total absorption heating value of outlet steam in the total supply heating value.” In other word, it is a rate how the boiler runs efficiently. The thermal efficiency of our coal-fired boilers is 84~92%, the efficiency of fuel and gas boilers is 96~99%, and the efficiency of biomass boilers is 86-93%. The higher the efficiency of the boiler, the better the heat transfer performance. Increasing boiler thermal efficiency can reduce boiler fuel consumption and reduce boiler operating costs. Increasing the thermal efficiency of the boiler is to increase the effective use of heat and reduce the heat loss of the boiler. The key point is to reduce the heat loss of the boiler exhaust gas and the loss of mechanical incomplete combustion.

Maintenance of the boiler plant food during the maintenance shutdown has deactivated which is to prevent boiler corrosion. Since boiler shutdown, a large boiler humidity, poor ventilation, if long-term in a wet state, oxygen in the air with the metal heating surface of the wet complete contact, the inner surface layer of brown rust generated; in addition, often the heat receiving surface of the gas side accumulating ash particles during operation, after the shutdown in the humid environment, will cause corrosion of metals. In the boiler shutdown process, the main reason is the presence of moisture and corrosion of metal surfaces of the air. Thus, as long as the metal surface or a metal surface with dry air (oxygen) isolation, can effectively prevent corrosion. The length of the parking time, there are packing, Paul dry, wet security, ventilation PROTECTION. 1, pressure maintenance Pressure maintenance is suitable for up to one week shutdown of the boiler. The residue pot pressure 0.05 ~ 0.1MPa, temperature slightly above 100 ℃. Boiler pressure and temperature to maintain regular methods using steam heating the water adjacent to the boiler, a heating boiler or intermittently. 2. Dry Dry care maintenance is a method to protect the desiccant into the pot and in the furnace. Its purpose is to keep no water jug. The utility model is suitable for long-term or seasonal shutdown boiler heating boiler. Open manholes and hand holes, the header and the drum-dried. When wet boiler room, with appropriate use of the furnace heat or light burning wood, so that the furnace, the furnace wall flue drying. After drying the boiler is cooled, the opening and tray formulated desiccant tube is placed in the pot, and a collecting box grate, then tightly closes the inlet aperture, and a valve connected to the hand hole to prevent air from entering. For some Mifengbuyan valves, plug board should be increased.

Steam boiler pressure controller function and debugging methods fired boiler, gas-fired boiler, horizontal industrial-fired steam boilers pressure controller and debugging method acting pressure controller is a pressure signal into an electric signal electromechanical conversion device, its function will be the high pressure or low levels of The electrical switching signal to the external circuit for automatic control or chain protection. Common pressure controller and pressure gauge, vapor pressure overpressure alarm can cut off the burner limit is reached; pressure controller adjusts single fire or dual fire burning the actual operating pressure; for large burner, the pressure may be adjusted according to the size of the size of the oil / gas, and always keep the pressure stable operation. Currently electrical contacts have been rarely used. Above the boiler pressure controller typically uses steam boiler pressure controller are used two to three pressure controller. Wherein a start and stop control furnace, for controlling a large and small fire conversion, there is used an overpressure protection. Two start and stop the boiler pressure controller is generally used to control the temperature controller, pressure controller is arranged to control the two-position and fire the boiler overpressure protection. Three safety accessories on the boiler must be in accordance with the procedures set two, which is intended primarily for safety. First, you can work to prevent another when one of them fails. Second, the purpose of comparison, in particular water level gauge and a pressure controller, to ensure safety, the operator to observe only one of which is the value indicated, but also controls the display shown two values ​​match. 3 generally require a pressure controller, operation is as follows: the first is a power adjusting; e.g. a small fire is set 0.5MPa, 0.4MPa furnace start, the adjustable screw -difference pressure controller (hysteresis) is 1, range (set value) is set to 5. The second pressure is shutdown, diffe set to minimum, range adjusted to 6 (0.6MPa). The third overpressure alarm is set at about 0.7Mpa. Note: the pressure differential must first be transferred back controller adjustment process, and then transferred range. Gas steam boiler pressure controller debugging, generally follow the principle: high pressure, is used as the overpressure protection; high pressure, as boiler start-stop control; low pressure, as a large and a small fire conversion. Specific pressure range may be adjusted according to the nominal pressure boilers and the requirements of use.

Fangkuai Boiler has more than 200 after-sales service outlets across the country. Each after-sales service outlet is equipped with a professional boiler technical engineer, providing 24-hour emergency repair services, and has sufficient spare parts and wearing parts all year round, convenient. Customers change in time.

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