Double pH adjustment flue gas desulphurization system and control method thereof

A desulfurization system and control method technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve difficulties, increase liquid-gas ratio and other problems, achieve fast dissolution, reduce liquid-gas ratio, and enhance desulfurization effect Effect

Active Publication Date: 2014-07-02
TONGFANG ENVIRONMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the case of a small site, it is often difficult to find a suitable location to arrange a new circulation pump, so the solution to increase the liquid-gas ratio is even more difficult

Method used

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  • Double pH adjustment flue gas desulphurization system and control method thereof
  • Double pH adjustment flue gas desulphurization system and control method thereof

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Embodiment Construction

[0023] see figure 1 , the invention includes a desulfurization device, a limestone supply device connected to the desulfurization device, a slaked lime supply device and a control module. The desulfurization device includes an absorption tower 11 and a circulating pump 12 placed on a circulating slurry pipeline. The limestone supply device includes a limestone bin 14, a limestone feeder 15, a limestone slurry tank 16, a limestone flow meter 17 and a limestone regulating valve 18 connected in sequence, and a limestone pH meter 13 is connected to the bottom of the absorption tower 11. The limestone slurry supply control module in the limestone supply device is respectively connected with the water storage tank one 19, the limestone flow meter 17, the limestone regulating valve 18 and the limestone pH meter 13 for control. The hydrated lime supply device includes a quicklime bin 1, a hydrated lime feeder 2, a lime digester 3, a hydrated lime delivery pump 4, a hydrated lime slur...

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Abstract

The invention discloses a double pH adjustment flue gas desulphurization system and a control method thereof and relates to a thermal power plant desulphurization technology in the technical field of environmental protection. The double pH adjustment flue gas desulphurization system comprises a desulphurization device and a limestone supply device. The double pH adjustment flue gas desulphurization system also comprises a control module and a slaked lime supply device connected to the desulphurization device. The slaked lime supply device comprises a quicklime cabin, a slaked lime feeder, a lime digestion tank, a slaked lime delivery pump, a slaked lime slurry tank, a slaked lime slurry feeding pump, a slaked lime flowmeter and a slaked lime control valve which are orderly connected. A slaked lime slurry feeding control module is connected respectively with a water storage tank II, the slaked lime flowmeter, the slaked lime control valve and a slaked lime pH meter and carries out control. A control module is connected respectively with a limestone slurry feeding control module and the slaked lime slurry feeding control module. The double pH adjustment flue gas desulphurization system can improve desulphurization efficiency, has a low investment cost, a low operation cost and a small floor space, is convenient for reconstruction and adjustment, has a high automation degree, and can operate stably.

Description

technical field [0001] The invention relates to the desulfurization technology of a thermal power plant in the field of environmental protection technology, in particular to a flue gas desulfurization system and a control method thereof with double pH value adjustment suitable for capacity increase and transformation of a desulfurization device. Background technique [0002] In recent years, with the gradual improvement of environmental protection requirements, in order to reduce SO in power plant flue gas 2 Many power plants have added desulfurization devices, the core equipment of which is the absorption tower. The bottom of the absorption tower is the absorbent slurry pool, and the absorbent is usually limestone. The upper part of the slurry tank is the inlet of the original flue gas of the boiler, and the upper part is a number of spray layers. The slurry circulation pump draws the circulating slurry (pH is usually 5~6) from the slurry pool, and the slurry becomes a la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/50B01D53/62
Inventor 汤乐萍肖海涛崔旭东邵小珍王圣孟德润高小红
Owner TONGFANG ENVIRONMENT
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