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Process for removing SO2 and NOX from flume gas adopting circulated moving bed

A technology of flue gas and moving bed, which is applied in the field of SO2 and NOX removal technology, and can solve the problems of large equipment investment, large land occupation, and high operating cost

Active Publication Date: 2007-10-24
HUAXI CHEM INST CHENGDU CITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned processes and their devices are relatively mature, and the desulfurization efficiency is relatively high, most of which are above 80%. The final by-products (such as gypsum) are difficult to sell, most of the substances produced during desulfurization cannot be used, and there are often secondary pollution problems in the desulfurization process

Method used

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  • Process for removing SO2 and NOX from flume gas adopting circulated moving bed

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Embodiment 2

[0033] Power plant boiler flue gas, of which SO 2 The content is 1698ppm, NO x The content is 297ppm, H 2O content (V / V) is 5.2%, O 2 The content is 6.1%, and the dust content is 300mg / m 3 , the flue gas temperature is 135°C. The above-mentioned flue gas adopts the process shown in Figure 1. After dust removal, humidification, and ammonia addition, it enters the adsorption tower, and is adsorbed and catalyzed under the action of the modified activated coke desulfurizer to remove SO in the flue gas. 2 and NO x , the remaining air is evacuated as exhaust gas. The adsorbed saturated desulfurizer flowing out continuously from the bottom of the adsorption tower is desorbed at a temperature of 430-445°C in the desorption tower, and after cooling and purging in the cooling tower and purging tower, it is screened to remove dust and make up The new desulfurizer is finally returned to the adsorption tower through the hoist for recycling. Detect the exhaust gas flowing out from th...

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Abstract

The invention discloses a SO2 and NOX stripping technology of flue gas, which comprises the following steps: disposing the flue gas through dedusting, humidifying and ammonifying in the adsorbing tower; proceeding adsorbing and catalytic reaction in the action of carbon desulfurizer to strip SO2 and NOX; draining the residual gas in the air; issuing the saturated desulfurizer from the bottom of adsorbing tower; desorbing in the desorbing tower at 300-700 deg C; dedusting and adding new desulfurizer through cooling and purging action; recycling the desulfurizer in the adsorbing tower.

Description

Technical field: [0001] The invention relates to a flue gas desulfurization process, in particular to a process for removing SO from flue gas through a circulating moving bed 2 and NO X craft. Background technique: [0002] Flue gases from fossil fuel combustion and metal smelting usually contain a considerable amount of SO 2 , this part SO 2 If it is not taken off, it will be directly discharged into the air and cause pollution. If the emission in a local area is too large, which exceeds the adjustment capacity of the atmosphere itself and cannot be completely digested, part of the SO 2 and its oxidation product SO 3 It will fall with the rainfall and form acid rain, which will endanger the living environment of human beings. SO 2 Acid rain hazards have become one of the three major environmental problems in the world today due to their wide coverage and difficult governance. In my country, due to the use of coal as the main energy source and the impact of the high-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/12B01D53/60
CPCY02A50/20
Inventor 李东林陈洪会侯世杰郎治李又福杨炯良赵力温岗蒋兆华
Owner HUAXI CHEM INST CHENGDU CITY