A cross-flow dual-stage moving bed active coke waste gas integrated purification tower

Abstract

The invention discloses a cross flow type two-stage moving bed active coke waste gas integrated purification tower which comprises a purification tower main body, wherein the purification tower main body is provided with an active coke feeding region, a denitration region, a transitional layer, a desulfuration region and a discharging layer sequentially from top to bottom; the denitration region comprises a denitration region active coke bed layer, a denitration region inlet chamber and a denitration region outlet chamber; the desulfuration region comprises a desulfuration region active coke bed layer, a desulfuration region outlet chamber and a desulfuration region inlet chamber; the transitional layer comprises an inlet chimney flue with a waste gas inlet, and a discharge hopper, the inlet chimney flue is arranged above the desulfuration region inlet chamber in a conducting manner, the denitration region active coke bed layer is connected with the desulfuration region active coke bed layer through the discharge hopper, and the desulfuration region outlet chamber is connected with the denitration region inlet chamber in a conducting manner. According to the invention, the pollution purification efficiency is high, the active coke utilization ratio is high, and the circulation volume is small; airflow distribution is uniform and the resistance is small; the flowing of the active coke is unobstructed and uniform, the denitration efficiency is high, and the operation is stable.

Description

technical field [0001] The invention relates to a gas purification tower, in particular to a cross-flow double-stage moving bed activated coke waste gas integrated purification tower. Background technique [0002] my country controls SO 2 NOx and NOx emission tasks are very heavy, and the exhaust gas emission standards are getting higher and higher. At present, most of the exhaust gas purification adopts wet technology, which consumes a lot of water resources and causes secondary pollution, and cannot desulfurize and denitrify at the same time, especially in northern my country. In areas rich in coal but short of water, water resources restrict economic construction and development. [0003] Activated coke flue gas purification technology is a recyclable dry flue gas purification technology. At a temperature of 80-150 ° C, through the adsorption and catalysis of active coke, the SO in the exhaust gas 2 ,O 2 、H 2 O reaction is converted into sulfuric acid and adsorbed in t...

AI Technical Summary

Problems solved by technology

[0006] The waste gas desulfurization and denitrification device disclosed in CN101801504A sets throttling control and dust collection methods in the lower part of the equipment, but the device does not adopt effective control on gas flow, and there is no SO 2 Effective control measures for nitrogen oxide removal, so used to treat SO 2 The effect should be better when the exhaust gas is lower

Patent CN201572596U discloses a cross-flow moving bed desulfurization tower, which optimizes the gas flow path and the inlet and outlet flues, and uses multiple feeding cones to control the flow of active coke to improve purification efficiency and reduce system resistance. Staged bed adsorption bed, the utilization rate of active coke is low, and the problem of uneven mixing of ammonia gas and flue gas during simultaneous desulfurization and denitrification needs to be improved

[0007] In addition, in some patents, the desulfurization tower and the denitrification tower are arranged separately, which increases the area occupied by the system.

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