A clean burning coal-fired circulating fluidized bed boiler

Abstract

The invention relates to the technical field of environment-friendly industrial boilers, in particular to a circulating fluidized bed boiler achieving clean combustion of the fuel coal. The circulating fluidized bed boiler achieving clean combustion of the fuel coal is characterized by comprising a circulating fluidized bed boiler body assembly, high-temperature smoke settling decontamination chambers, a heat exchange system and a calcium spray system assembly. Calcium sulfate salt particles, as a product, and other smoke intensely collide under the action of the gravity and baffling blocking walls and lose kinetic energy to fall into the decontamination chambers, and under the condition of high temperature, the calcium sulfate salt particles and the smoke are molten into Newtonian-fluid-like molten fallen ash distributed on the surfaces of the decontamination chambers. Small particles intensely collide under the action of the gravity and the baffling blocking walls and lose kinetic energy to fall into the decontamination chambers. Adhesion of the particles of a tinier diameter is achieved through the Newtonian-fluid-like surface tension of the molten fallen ash. The circulating fluidized bed boiler achieving clean combustion of the fuel coal solves the universal problem that metal on a heated surface is worn by being scoured by high-speed smoke carrying particles in the technical field of the industrial boilers.

Description

technical field [0001] The invention relates to the field of environmental protection industrial boilers, in particular to a clean combustion coal-fired circulating fluidized bed boiler. Background technique [0002] Industrial boilers are important thermal power equipment. Nowadays, they are more and more restricted by energy policies, energy conservation and environmental protection requirements. However, the national conditions of our country are that coal is an important fuel due to the abundant coal resources. However, the main emission of coal-fired boilers is Pollutant SO 2 How to reduce or even eliminate emissions is a problem that engineers and technicians in the field strive to solve. Chinese invention patent (Patent No. 200610088987.2, patent name: Coal master-combustion furnace and coal combustion method for reducing coal-fired pollutant emissions) discloses a coal-combustible furnace and coal combustion method for reducing coal-fired pollutant emissions. The ch...

AI Technical Summary

Problems solved by technology

In the prior art, the first example is used to design the pyrolysis chamber and the ember chamber to improve the combustion efficiency and then improve the boiler efficiency to achieve the purpose of coal-fired clean combustion, but the pollutants produced by it such as SO 2 , NO X , How to purify the smoke and dust is not mentioned

In the prior art, in the first example, the addition of sulfur-fixing agent is used to form products such as activated fly ash, self-hardening fly ash, Belite cement clinker and silicate materials, because the additives usually wrap combustibles and hinder It is difficult to burn out in contact with oxygen, thereby reducing the combustion efficiency, which is undoubtedly unfavorable for the purpose of achieving clean combustion of coal

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