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Flue gas desulfuration system for removing tar in desulfurization solution

A technology of desulfurization system and desulfurization liquid, applied in the direction of liquid separation, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of short equipment life and low quality of gypsum, and achieve the effect of preventing desulfurization efficiency and improving steam production efficiency

Inactive Publication Date: 2010-09-08
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a desulfurization system for removing tar in desulfurization liquid, which solves the problems of short equipment life and low quality of gypsum caused by tar in the desulfurization liquid in the calcium carbide slag / white mud-gypsum desulfurization system

Method used

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  • Flue gas desulfuration system for removing tar in desulfurization solution
  • Flue gas desulfuration system for removing tar in desulfurization solution

Examples

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Embodiment

[0021] The boiler in the comparative example adopts such as figure 1 The desulfurization system shown.

[0022] The desulfurization liquid is extracted from the desulfurization tower 1 by the gypsum discharge pump 2 and sent to the primary cyclone 3. After the desulfurization liquid is centrifugally separated by the primary cyclone 3, the top flow 14 of the primary cyclone flows to the buffer tank 5 , the slurry in the buffer tank 5 overflows from the overflow position, the overflow 13 returns to the desulfurization tower 1, the bottom flow of the primary cyclone is connected to two pipelines, the first pipeline 11 returns to the desulfurization tower 1, and the second pipeline 12 is transported to the vacuum belt conveyor 4 , the wastewater treatment pump 6 extracts the slurry 15 in the buffer tank 5, and sends it to the secondary cyclone 7. After the secondary cyclone 7 is centrifuged, the bottom flow 16 of the secondary cyclone flows to the desulfurization tower 1, and the ...

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Abstract

The invention discloses a desulfuration system for removing tar in desulfurization solution, comprising a desulfurizing tower, the desulfurization solution is pumped into a first-grade swirler from the desulfurizing tower, the top flow of the first-grade swirler is connected to a buffer tank, and the bottom flow of the first-grade swirler returns to the desulfurizing tower or is transported to a vacuum belt conveyor; the buffer tank is provided with an overflow position, and overflow flowing out of the overflow position returns to the desulfurizing tower; and seriflux in the buffer tank is pumped into a second-grade swirler, the top flow of the second-grade swirler is connected to a waste water tank, and the bottom flow of the second-grade swirler returns to the desulfurizing tower. In the invention, the desulfurization solution discharged from the desulfurizing tower by the system enters the first-grade swirler to be sorted; the top flow sorted by the first-grade swirler flows through the second-grade swirler to be sorted; finally the top flow of the second-grade swirler which contains most of tar is discharged from the desulfuration system to prevent the tar from affecting desulphurization efficiency, equipment service life and gypsum quality; and the separated waste water containing the tar is transported to a coal yard for humidifying coal and improving boiler steam generating efficiency.

Description

technical field [0001] The invention belongs to the field of flue gas desulfurization, and in particular relates to a flue gas desulfurization system for removing tar in desulfurization liquid. Background technique [0002] Calcium carbide slag is the waste residue with calcium hydroxide as the main component after the hydrolysis of calcium carbide to obtain acetylene gas, and calcium carbide is generally produced by electrothermal method, that is, quicklime and carbon-containing raw materials (coke, anthracite or petroleum coke) are placed in the calcium carbide furnace by electric arc. High temperature melting reaction to generate calcium carbide. In the production process, due to the incomplete reaction of the production of calcium carbide, it is inevitable to bring glue and oily substances into the carbide slag. [0003] White mud is the pulping black liquor in the paper industry, which is extracted, evaporated and concentrated, and burned in an alkali recovery furnace ...

Claims

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Application Information

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IPC IPC(8): B01D53/80B01D53/50B01D53/96B01D17/038
Inventor 莫建松夏纯洁程斌吴忠标程常杰
Owner ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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