Desulfurization device for carbon plant flue gas and a desulfurization method thereof

Abstract

The invention discloses a desulfurization device for carbon plant flue gas and a desulfurization method thereof. The desulfurization device mainly includes a tar removal device, an absorption device and a circulation pump, wherein the tar removal device is disposed at an inlet of the absorption device, and the absorption device is internally sequentially provided with a defogging area, an absorption area and an oxidation area from top to bottom. A demister is arranged in the defogging area, the absorption area is a spray absorption layer, a liquid inlet pipe of the circulation pump is connected into the oxidation area, a liquid outlet pipe of the circulation pump is connected into the absorption area to be connected with the spray absorption layer, and the top of the absorption device is provided with a smoke outlet. The desulfurization device is suitable for uncoiling of flue gas with high tar content, and the tar content can be reduced to below 10 mg / Nm3 or below, the tar and gas areseparated by the difference of centrifugal force formed by different densities, the efficiency is up to 97.5%, and no additional energy is consumed. No power is consumed, the running cost is low, andthe desulfurization device is particularly effective for flue gas with high tar content.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization, and in particular relates to a desulfurization device for flue gas of a carbon plant and a desulfurization method thereof. Background technique [0002] With the development of the environmental protection industry and the improvement of environmental protection requirements, following the desulfurization of boilers in the power industry and industrial self-provided power plants, other industrial waste gases require purification. The treatment requirements are also getting higher and higher. At present, the conventional desulfurization of coal tar flue gas from carbon plants cannot meet the requirements due to the high tar content. Direct desulfurization tends to block the nozzles of the absorption device, which causes the desulfurization device to fail to operate normally, and seriously affects the desulfurization efficiency, resulting in substandard emissions. In addition, a l...

AI Technical Summary

Problems solved by technology

Direct desulfurization will often block the nozzle of the absorption device, resulting in abnormal operation of the desulfurization device, and seriously affecting the desulfurization efficiency, resulting in substandard emissions

And a large amount of tar enters the desulfurization absorption device, and then enters the desulfurization gypsum, causing the desulfurization gypsum to contain tar, and the purity of the gypsum is low, which cannot be used as a resource, resulting in secondary pollution

[0003] The traditional method of the flue gas desulfurization process from the roaster of the carbon plant: generally, it is washed and dust-removed first, and then a part of the tar is removed by electric coke capture, and finally enters the desulfurization absorption device. Attached to the electrode tube of electric coke capture, it is difficult to wash, and the resistance increases after running for a period of time, the effect of electric coke capture is limited, the efficiency of tar removal is reduced, and the purification ability is reduced. On the other hand, the equipment is seriously blocked, so the coal tar must be removed before entering the flue gas absorption device

The investment of electric coke capture is large, and the operation and maintenance costs are high

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