DHX coal-fired CFB (circulating fluidized bed) steam boiler

Product thermal capacity: 35-75 t/h

Working pressure: 1.25-5.3 MPA

Outlet temperature: 194-485 ℃

Available fuel: Bituminous coal, anthracite, meagre coal, lignite, gangue, waste, sludge

Available industries: Chemical, food, tobacco, textile, printing and dyeing, feed, medicine, building material, wine, rubber, hospital

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Introduction

As a new mature high-efficiency and low-pollution clean coal technology, circulating fluidized bed combustion (CFBC) technology has many advantages that other combustion methods do not have. Circulating fluidized bed combustion is low-temperature combustion, so the NOx emission is much lower than that of pulverized coal furnace, only 200ppm. CFBC can desulfurize directly during the combustion process, and the desulfurization efficiency is high. The technology and equipment are simple and economic, and the costs of its initial investment and operation are much lower than those of dry pulverized coal furnace and flue gas desulfurization (PC+FCD). The discharged ash residue has good activity and is easy to be comprehensive utilized without secondary ash residue pollution. The load adjustment range is large, and the low load can be reduced to about 30% of the full load.

Technical advantages/High temperature cyclone separator

High efficiency, wear resistance, separation efficiency ≥ 98%, effectively improve the combustion efficiency of the boiler thermal efficiency.

Large furnace design

Large furnace, low velocity design; the application of wearproof tube technology, reducing erosive abrasion.

Extend the residence time of coal particles in the furnace so that the coal can be fully burned.

Bell jar type hood

Adopt bell type hood to distribute air averagely and avoid fuel reverse to wind chamber.

bed pressure operation

By particle optimization, the operating bed pressure can be decreased to 3500Pa, which effectively saves operating costs and greatly reduces the oxynitride generated.

All around the boiler proper is made of welded membrane walls, and the steel structure is completely sealed to prevent the occurrence of air leakage. The upper part of the boiler can be divided according to the size of the railway transportation limit. The excess air coefficient after the heating surface of the boiler tail is only less than 1.2, which not only reduces the heat loss of the exhaust fumes, reduces the power consumption of the induced draft fan, but also greatly reduces the environmental pollution of the boiler house.

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