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Cyclic fluidized bed active coke desulfurating and sulfur reutilization method

A circulating fluidized bed and activated coke technology, applied in chemical instruments and methods, separation methods, preparation/purification of sulfur, etc., can solve the problems of extremely high requirements for equipment manufacturing materials, high price of activated carbon, and increased operation investment, etc., to achieve Low operating cost, considerable economic value, and good continuity

Inactive Publication Date: 2003-08-13
国家电站燃烧工程技术研究中心 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The emission of sulfur dioxide has caused serious acid rain pollution and ecological damage
The final product of the above various methods is concentrated sulfuric acid, and the problem of dilute sulfuric acid concentration is ubiquitous, and the rich SO obtained by desorption 2 The conversion of gas into concentrated sulfuric acid requires acid-making equipment; the price of activated carbon is high, which increases operating investment; the acid in the washing liquid is bound to cause secondary pollution; dilute sulfuric acid is highly corrosive and requires extremely high equipment manufacturing materials; There are a lot of problems in the transportation and storage of its products; at present, the production and sales of sulfuric acid in my country have tended to be balanced, and the price of sulfuric acid is low; at the same time, my country needs to import a large amount of sulfur every year

Method used

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  • Cyclic fluidized bed active coke desulfurating and sulfur reutilization method

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Effect test

Embodiment 1

[0040] A power station boiler discharges flue gas of 170,000 cubic meters per hour, and the sulfur content in the flue gas is 2000mg / Nm 3 , The designed diameter of the reactor is 3.9 meters, the height is 20 meters, the volume of the active coke desorption device (3) is 10 cubic meters; the particle size of the selected active coke is about 2.5-7.5mm, and the total circulation is 80 tons. The specific process is:

[0041] The flue gas from the tail of the power plant boiler first enters the pre-dust collector (1), and the flue gas after dust removal enters the reactor (3) through the venturi tube (2), and the active coke is added from the lower part of the desulfurization tower reactor side, and the flue gas and active The coke is fully contacted, the circulation flows, and the SO is removed 2 etc. flue gas and adsorbed SO 2 The activated coke enters the cyclone separator (4), and the flue gas is discharged; the attached SO 2 Active coke enters the active coke adding devic...

Embodiment 2

[0043] A power plant boiler discharges 485,000 cubic meters of flue gas per hour, and the sulfur content in the flue gas is 6,000 mg / Nm 3 , The designed diameter of the reactor is 6.6 meters, the height is 30 meters, the volume of the active coke desorption device (3) is 45 cubic meters; the particle size of the selected active coke is about 2.5-7.5mm, and the total circulation is 560 tons. The specific process is:

[0044] The flue gas from the tail of the power plant boiler first enters the pre-dust collector (1), and the flue gas after dust removal enters the reactor (3) through the venturi tube (2), and the active coke is added from the lower part of the desulfurization tower reactor side, and the flue gas and active The coke is fully contacted, the circulation flows, and the SO is removed 2 etc. flue gas and adsorbed SO 2 The activated coke enters the cyclone separator (4), and the flue gas is discharged; the attached SO 2 Active coke enters the active coke adding devi...

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Abstract

A desulfurizing process with circulating fluidized bed for the flue gas at 70-200 deg.C containing SO2 and NOx is characterized by that said flue gas and the active coke as desulfurizing agent are continuously fed in the reactor of desulfurizing tower for removing dust, SO2 and NOx, the clean flue gas flows in chimney for exhausting it, the active coke is regenerated then in regenerating tower for further using it in desulfurizing tower, and SO2 is reduced to become sulfur to be recovered. Its advantages are high desulfurizing efficiency, low cost and water consumption, and no secondary pollution.

Description

Technical field: [0001] The invention belongs to the technical field of flue gas desulfurization, and in particular relates to a process and system for circulating fluidized bed dry flue gas desulfurization. This technology has been applied and will be widely used in flue gas from coal-fired thermal power plants and garbage power plants Exhaust pollutants sulfur dioxide and NO x The emission control process is suitable for the desulfurization technical transformation projects of various existing units. Background technique: [0002] The emission of sulfur dioxide has caused serious acid rain pollution and ecological damage. my country is a country rich in coal resources, and it is also the largest coal producer and consumer in the world; the main form of coal utilization is direct combustion, which occupies more than 80% of the total coal, and a large amount of coal combustion produces a large amount of pollutants such as sulfur dioxide , its sulfur dioxide emissions rank f...

Claims

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Application Information

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IPC IPC(8): B01D53/12B01D53/83C01B17/04
Inventor 李振中李辰飞冯兆兴董建勋王阳程云驰朱利民马力刘刚刘晓东于遂影王志强冯广伟张悦陆诗诣叶枫祁宁苏振东
Owner 国家电站燃烧工程技术研究中心
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