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What are the fuels for biomass-fired pellet boilers? Steam boiler blowdown and water drainage device

2021-05-17 09:16    page view:

Guide: Biomass boilers have a rich variety of fuels, which are renewable resources and can produce steam, hot water, heat transfer oil, etc. Biomass boilers can be equipped with corresponding dust collectors according to local environmental protection requirements, such as ceramic multi-tube cyclone dust collectors, horse water mill dust collectors, bag dust collectors, etc., to meet local environmental protection requirements. What are the fuels for biomass-fired pellet boilers? What should be paid attention to in the blowdown and water discharge devices of steam boilers?

Biomass boilers have a rich variety of fuels, which are renewable resources and can produce steam, hot water, heat transfer oil, etc. Biomass boilers can be equipped with corresponding dust collectors according to local environmental protection requirements, such as ceramic multi-tube cyclone dust collectors, horse water mill dust collectors, bag dust collectors, etc., to meet local environmental protection requirements. What are the fuels for biomass-fired pellet boilers? What should be paid attention to in the blowdown and water discharge devices of steam boilers?

1. What are the fuels for biomass-fired pellet boilers

  The biomass-fired pellet fuel boiler is made of straw, rice straw, rice husk, peanut husk, corn cob, camellia husk, cottonseed husk, etc., as well as "three remnants" through processing to produce block or granular environmental new energy. Its advantages are as follows:

  1, biomass pellet fuel has a large calorific value, the calorific value is about 3900-4800 kcal/kg, and the calorific value after carbonization is as high as 7000-8000 kcal/kg.

  2. Biomass pellet fuel has high purity and does not contain other sundries that do not produce heat. Its carbon content is 75-85%, ash content is 3-6%, water content is 1-3%, and it is absolutely free of coal gangue, stones, etc. Impurities that do not generate heat but consume heat will directly reduce costs for enterprises.

  3, Biomass pellet fuel does not contain sulfur and phosphorus, does not corrode the boiler, and can extend the service life of the boiler, and enterprises will benefit a lot.

  4. Because biomass pellet fuel does not contain sulfur and phosphorus, it does not produce sulfur dioxide and phosphorus pentoxide during combustion, so it does not cause acid rain, does not pollute the atmosphere, and does not pollute the environment.

  5. Biomass pellet fuel is clean and hygienic, convenient to feed, reduces the labor intensity of workers, greatly improves the labor environment, and enterprises will reduce the cost of labor.

  6. ​​There is very little ash after the biomass pellet fuel is burned, which greatly reduces the site for stacking coal and reduces the cost of sludge.

  7. The ashes from the combustion of biomass pellet fuel are high-quality organic potash fertilizers that can be recycled for profit.

  8. Biomass pellet fuel is a renewable energy blessed by nature to us. It responds to the call of the central government to create a conserving society.

Biomass boiler fuel

2. Biomass steam boiler blowdown and water discharge device

  1. Steam boiler drum (shell), vertical boiler lower foot ring and the lowest part of the water circulation system need to be equipped with a blowdown valve; B-level and below boilers use a quick-open blowdown valve; the nominal passage of the blowdown valve is 20mm~ 65mm; the nominal passage of the drain valve on the shell of the horizontal shell boiler is not less than 40mm;

  2, steam boilers and Class B hot water boilers with rated evaporation> 1t/h, two valves in series are installed on the blowdown pipe, at least one of which is a blowdown valve, and is installed on the side close to the outlet of the blowdown pipeline;

  3, the lowest header (or pipeline) of the superheater system, reheater system, and economizer system is installed with a drain valve;

  4. The steam boiler drum with a superheater is equipped with a continuous blowdown device;

  5. Each boiler is equipped with an independent blowdown pipe. The blowdown pipe minimizes elbows to ensure that the blowdown is unblocked and is connected to a safe place or blowdown expansion tank (expansion vessel); if a pressure blowdown expansion tank is used, the blowdown expansion tank Need to install a safety valve;

  6. ​​When multiple boilers share one discharge header, it is necessary to avoid simultaneous blowdown of more than two boilers;

  7. The blowdown valve and blowdown pipe of the boiler should not be connected by thread.

The above introduces the issues related to biomass-fired pellet boiler fuel and steam boiler blowdown and water drainage devices. When purchasing biomass boilers, you must choose carefully, choose the appropriate boiler manufacturer, examine the quality and operating conditions of the boiler, and ensure that the boiler can operate stably. Energy saving, environmental protection, truly serving users, and maximizing user benefits.

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