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ZOZEN new type of low NOx circulating fluidized bed (CFB) boiler

循环流化床原理图

What is the circulating fluidized bed (CFB) boiler?

The circulating fluidized bed (CFB) boiler adopts the fluidized combustion. Its main structure consists of the combustor (dense phase zone and dilute phase zone) and the circulation loop (high temperature cyclone separator and return system). Nowadays, the circulating fluidized bed (CFB) boiler has well solved the basic problems on thermology, mechanics and materials science, and has become the advanced technology for energy utilization of non-flammable solid fuels such as coal gangue, oil shale, municipal refuse, sludge and other wastes.

ZOZEN low NOx circulating fluidized bed (CFB) boiler emerges to meet the needs of the times

With the world’s environmental protection requirements become increasingly strict, the manufacturing and use of coal-fired boilers are largely restricted. According to the market demands, ZOZEN insists on innovation and develops another environment-friendly coal-fired boiler - SHX/DHX series circulating fluidized bed (CFB) boiler, which has the wide fuel adaptability and is suitable for a variety of fuels such as coal, gangue, waste, sludge, etc.

Technological advantages

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zozenWide fuel adaptability, high combustion efficiency

  • Suitable for good-quality coal and biomass; also suitable for poor-quality fuels that can not be burned by the chain grate boiler such as coal gangue, waste, sludge, etc.
  • Good gas-solid mixture, high combustion rate, recycle of flying ash for combustion, the content of combustible materials in the slagging ≤2%, the content of combustible materials in the flying ash ≤8%.

zozenAir leakage and abrasion problem solutions

  • Adopts the water-cooled wall with the abrasion-proof structure, the large furnace and low flow rate design can reduce the erosive wear, fully enclosed structure can solve the air leakage problem;
  • Adopts the high temperature volute spiral cyclone separator with a small entrainment and a high separation efficiency of 99.7%, which can effectively prevent the abrasion of rear heating surface.
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zozenLow emission: high-efficiency desulfurization and low NOx

  • Low NOx emission: 1) staged air supply and low temperature combustion; 2) staged combustion can restrain the nitrogen in the fuel from changing to be NOx and restore the generated NOx to lower the NOx emission to 100 mg/m³;
  • High-efficiency desulfurization: limestone desulfurization inside the furnace + standby wet method desulfurization outside the furnace to lower the SO₂ emission to less than 5 mg/m³.

zozenWide range of load regulation, quick load regulation

  • When the load changes, the boiler can keep the stable operation and thermal efficiency at a 30% load state only by adjusting the coal feeding amount, air supply amount and material circulation amount. The load regulation ratio of circulating fluidized bed (CFB) boiler can reach 3-4:1;
  • The load regulation rate can reach 5% per minute.
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ZOZEN new type of circulating fluidized bed

(CFB) boiler can guarantee:

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ZOZEN’s excellent product performance comes from its comprehensive strength

Circulating fluidized bed (CFB) boiler classic cases

The low NOx circulating fluidized bed (CFB) boiler developed by ZOZEN Boiler this time has successfully helped major well-known enterprises improve their economical efficiency, and is widely used in chemical, power generation, non-ferrous metallurgy, paper-making, rubber tires, central heating and other industries.