CFB Power Plant Boiler Industry Of Steel

CFB Power Plant Boiler Industry Of Steel

Henan gas into the furnace cfb power plant boiler industry of steel fuel increased water hazards into the furnace when the fuel moisture increased, the economic impact on the operation of the gas and security of Henan boiler? (1) Influence of the fuel ignition and combustion stability, greatly affect the boiler combustion efficiency, resulting in increased ash carbon content. (2) when the fuel into the furnace of greater than 40% moisture, rapid deterioration of the combustion conditions, a sharp decline in the furnace temperature, Henan take positive and negative pressure gas boilers recurrent problem prone. Experimental studies have shown that, when the fuel into the furnace of greater than 60% moisture, heat emitted from the combustion of the fuel is greater than the moisture evaporation of the fuel, the heat required overheating, combustion can not be maintained. (3) After the fuel moisture into the furnace is increased, at the same load, leading to increased flue gas volume, gas velocity increases, increasing the wear rate of the heating surface of the tail; (4) water into the furnace after the fuel increase, the same load, resulting in smoke increasing the amount of exhaust gas temperature rise, increases heat losses. (5) increase in water after the fuel into the furnace, the flue gas water vapor content increases, the flue gas acid dew point temperature, increasing corrosion tail heating surface tubes.

Boiler explosion in the cfb power plant boiler industry of steel explosion pressure is always weak parts of component failure, and then by the gas, water expansion due to severe water hammer pot large amount of water so that the tear propagation occur. Vertical boiler rupture, most of them in scraps circle at a lot of steam from cracks jet, flew into the sky like a rocket, likely to fly away from tens to hundreds of meters; horizontal boiler explosion, prone to high temperatures in the lower abdomen drum furnace or combustion zone above the high temperature radiant section, since the inside of the furnace, boiler most likely parallel longitudinal flew. Next, we analyze the reasons for the explosion of the boiler equipment: 1, congenital defects: design errors, force structure, thermal compensation, the water cycle, a serious error with respect timber, strength calculation, safety facilities; manufacturing error, the wrong material, not according to the drawings, poor quality welding, heat treatment, hydrostatic testing, and process specification errors. 2, overpressure rupture: high operating pressure exceeds the boiler working pressure permit the element stress than the material limit stress. Overpressure conditions often due to safety relief device failure, inaccurate pressure gauge, overpressure alarm device failure, severe water shortages and accidents caused by improper handling. 3, overheating failure: a steel sheet hot burn, reduce the strength member caused damage. When the boiler water is generally dry, thick fouling, boiler water, there is reason to cause foreign matter or grease fall within the drum asbestos rubber plate or the like. 4, and burst patterns from slot: receiving element alternating stress, fatigue cracks, but also by the combined effects of corrosion, resulting in a groove-shaped thinned. 5, water hammer damage: the system caused by improper operation soda water hammer, so that the additional element by a strong stress failure. These are the causes of boiler explosion, I believe you must have learned a lot of knowledge of it, I hope this can help you to better avoid the occurrence of such phenomena, to ensure the safety of the work carried out.

The key to avoiding the excess air in the furnace is the proper air distribution and the appropriate monitoring and control means. The monitoring method has a method for measuring the content of CO2 or O2, and the oxygen content of the gas cfb power plant boiler industry of steel is usually determined. This is because the gas boiler is burned with a slight positive pressure, and the sealing problem is easily solved. The measurement of the oxygen content accurately reflects the excess air coefficient value. Nowadays, the oxygen content measurement technology generally uses a zirconia constant temperature oxygen analyzer to continuously measure the oxygen content of the flue gas. According to the oxygen content of the flue gas as a reference, the air-fuel ratio is properly adjusted to perform low-oxygen combustion.

In October 2016, my company and the China Dunhuang International Hotel signed a ZWNSL2.1-1.0 / W-Y.Q vacuum condensing gas hot water cfb power plant boiler industry of steel to provide heating and hot water for the hotel. The boiler implementing the response to the national policy of environmental protection requirements and local environmental protection departments on a series of low nitrogen emission standard boiler requirements, in terms of design, manufacture, installation and other sectors have strict checks to ensure that the boiler safe and stable operation.


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