Comprehensive recovery and utilization method for exhaust gas

A comprehensive method and tail gas recovery technology, applied in separation methods, chemical instruments and methods, applications, etc., can solve environmental pollution and other problems, achieve the effects of reducing air pollution, increasing agricultural and forestry output, and promoting environmental protection

Inactive Publication Date: 2006-07-12
李志恒
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] In order to change the status quo of environmental pollution and waste of resources caused by exhaust emissions from existing coal-fired boilers, the present invention proposes a set of three-phase recovery of gas, solid and liquid afte

Method used

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  • Comprehensive recovery and utilization method for exhaust gas
  • Comprehensive recovery and utilization method for exhaust gas
  • Comprehensive recovery and utilization method for exhaust gas

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Embodiment Construction

[0013] exist figure 1 Among them, (1), (2), (3), (4), and (12) are the existing traditional exhaust gas emission methods of coal-fired boilers;

[0014] (1), (2), (3), (4), (5), {(6), (7), (8)}, {(9), (10), (11)} are the present invention A comprehensive method for the recovery and utilization of coal-fired boiler tail gas is proposed.

[0015] exist figure 1 In, CO 2 Purification and liquefaction process (6) is to produce liquid carbon dioxide (purity above 99.5%), which is injected into pipelines for transportation or injected into containers and transported by vehicles; 2 The gas pipeline (7) is a mixed gas (low pressure CO 2 , oxygen, nitrogen) are transported by pipeline; CO 2 Purification dry ice process (8) is to produce CO 2 Solid, with insulation measures, transported by vehicle.

[0016] exist figure 1 In the illustrated embodiment, the facility agriculture area (10) is a year-round time period, and CO is applied during the day. 2 ; Under the natural conditi...

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Abstract

The invention relates to a tail gas recycle and integrated utilization method, which prepares the smoke of coal boiler via temperature decreasing, de-rusting, dry method or wetting desulfuration denitration method, and finished desulfuration denitration into gas, liquid and solid carbon dioxide product to apply agriculture and forest.

Description

Technical field [0001] The invention relates to a comprehensive method for tail gas recovery and utilization, in particular to a comprehensive method for recovery and utilization of coal-fired boiler tail gas. Background technique [0002] At present, the known coal-fired boiler tail gas treatment adopts dry or wet desulfurization and denitrification technology, and the dry desulfurization rate is about 85%, and the wet desulfurization rate is about 90%. 2 and NO X The concentration of the main pollutants does not exceed the standard, and the induced air volume of the induced draft fan is increased, which not only does not reduce the SO 2 The total amount of emissions, and a large amount of oxygen-enriched flue gas, coal due to insufficient combustion, 8-10% unburned coal in the slag, and increased air preheating costs, resulting in new waste of resources and other issues, while Carbon dioxide produced by combustion (abbreviated as CO 2 ) are all discharged into the air, ...

Claims

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Application Information

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IPC IPC(8): F23J15/00B01D53/34C01B31/20C05D7/00C01B32/50
Inventor 李志恒
Owner 李志恒
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