A boiler device using cyclone combustion method

Abstract

The invention discloses a boiler device adopting a cyclone combustion method, which comprises a cyclone tube, a boiler main furnace and a liquid slag granulation water tank. A primary air inlet is arranged at the front end of the cyclone tube, and a secondary air inlet is arranged in the middle of the cyclone tube. The tail of the cyclone is seamlessly connected with the main furnace of the boiler through a concave outlet; the lower tapered part of the main furnace of the boiler is a cold ash hopper, and the lower part of the cold ash hopper is arranged with a granulation water tank for granulating the boiler liquid slag discharge. The boiler device of the present invention has the following advantages: the fuel to be burned only needs to be simply crushed, which greatly saves the power consumption and cost of pulverizing; the combustion is stable; the heat intensity is high, and the boiler volume is small; the combustion efficiency is high and the economy is good; slag; ash and slag capture rate is high, fly ash content is greatly reduced; boiler size is compact; can burn a variety of fuels, fuel adaptability; boiler load adjustment capacity is large; ash slag is easy to comprehensive utilization; greatly reduce the occurrence of high temperature corrosion .

Description

technical field [0001] The invention relates to a boiler device adopting a cyclone combustion method, which belongs to the field of boiler equipment. Background technique [0002] In recent years, my country's economy has developed rapidly, and the demand and supply of electricity have continued to grow. In the foreseeable future, it is difficult to change the important position of coal. Therefore, in terms of power structure, the basic pattern of coal-fired units will continue to be maintained for a long time to come. [0003] From a long-term perspective, the development of coal-fired boiler technology, especially the development of new high-efficiency coal-fired boiler technology, will still be a hot spot in my country's power industry for more than one hundred years. In the process of researching and developing new high-efficiency coal-fired boiler technology, we must closely combine the actual characteristics of my country's coal resources and proceed from reality. Th...

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Problems solved by technology

The problems of slagging and high-temperature corrosion on the furnace heating surface have always plagued the power industry, seriously affecting boiler output, reducing boiler efficiency, and causing damage to boiler equipment, affecting safe operation in severe cases, and causing great economic losses (such as in 1993 Beilun Port Incident)

[0009] Although the biggest advantage of the circulating fluidized bed (CFB) boiler lies in the efficient utilization of low-quality coal (such as coal gangue, etc.) and low SO 2 , low NO x On the other hand, the disadvantages of CFB boilers, such as low power generation efficiency, high plant power consumption rate and serious boiler component wear, have always plagued the power industry and are also a bottleneck restricting its large-scale development. With the entry into force of the new air pollutant emission standard for thermal power plants at this stage, although my country's CFB technology is at the international advanced level and some technologies are at the international leading level, it still cannot meet the emission limit requirements in the new standard

[0012] The carbon content of the fly ash of most W flame boilers is around 10%-20%, some are even as high as 20%-30%, and only a few are lower than 10%, which seriously reduces the boiler efficiency and causes great damage. fuel waste

[0013] (2) Serious slagging in the lower furnace;

But on the other hand, due to the rough surface of the combustion belt, it is very easy to slagging and hanging, especially when coal with a low ash melting point is used, it is very easy to slagging, and even serious coking, which affects the safe operation of the boiler

[0015] (3) Pollutant NO x high emissions

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