Catalytic double-alkali desulphurization and dust removal process

A technology of desulfurization and dust removal and dual-alkali method, which is applied to chemical instruments and methods, separation methods, and separation of dispersed particles. It can solve problems such as the failure of long-term continuous operation of equipment and fouling of desulfurization and dust removal towers for circulating fluids, and promote rapid precipitation. , avoid secondary pollution, solve the effect of thickening

Inactive Publication Date: 2013-01-02
GONGYI LIANGHUI ENVIRONMENTAL PROTECTION MACHINERY EQUIP FACTORY
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The present invention aims at the fact that in the prior art, during the desulfurization process using the double-alkali method, the circulating fluid gradually thickens and scales are easily generated in the desulfurization and dust removal towers, resulting in equipment failure. To solve the problem of long-term continuous operation, provide a desulfurization and dust removal process that can continuously cycle and reduce maintenance times

Method used

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  • Catalytic double-alkali desulphurization and dust removal process

Examples

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Embodiment 1

[0032] Embodiment 1: see figure 1 , the present invention adopts catalytic double-alkali desulfurization and dust removal process, utilizes different desulfurization and dust removal towers, enters the inner cavity from the top of the dust removal and desulfurization tower to form a spray-like lye, reacts with the original flue gas to form sewage, and discharges sewage from the bottom of the dust removal and desulfurization tower The original flue gas enters the inner cavity through the bottom of the dust removal and desulfurization tower, and after reacting with the sprayed lye, the clean gas is discharged from the top of the dust removal and desulfurization tower.

[0033] First, NaOH is added to the rich solution pool to form a solution with a pH value of about 11, and the NaOH consumption can be regularly replenished by detecting the pH value. At the same time, add washing powder or detergent to this solution, and add Na 3 PO 4 , NaOH solution with washing powder, deter...

Embodiment 2

[0044] Example 2: see figure 1 , the content is basically the same as in Example 1, and the similarities are not repeated. The difference is: 1 kilogram of washing powder and detergent are added in 100 tons of NaOH solution (1 kilogram of washing powder and detergent), and 500 ~ 1000 kg Na 3 PO 4 .

Embodiment 3

[0045] Embodiment 3: see figure 1 , content is basically the same as embodiment 1, and similarity is not repeated, and difference is: only add 1 kilogram of washing powder in 100 tons of NaOH solutions.

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Abstract

The invention discloses a catalytic double-alkali desulphurization and dust removal process. NaOH is added into a rich liquor tank and one selected from or a mixture formed by two or three selected from the group consisting of washing powder, a washing agent and Na3PO4 is added at the same time, which enables surface tension of liquid to be reduced and rapid deposition of Ca(OH)2 or dust to be promoted; if Ca(OH)2 forms fouling in a dedusting desulfurization tower, normal operation of the dedusting desulfurization tower is affected. Meanwhile, after a foam layer is formed in the dedusting desulfurization tower, SO2 can be fully absorbed and fully reacts, thereby achieving the purpose of full desulphurization. The process provided by the invention has a remarkable effect, can ensure that equipment continuously runs for a long time and is substantially in a maintenance-free state, saves cost and is favorable for popularization and application.

Description

[0001] technical field [0002] The invention belongs to the technical field of flue gas desulfurization and dust removal, and in particular relates to a catalytic double-alkali desulfurization and dust removal process. Background technique [0003] For the desulfurization and dust removal treatment of the original flue gas discharged from power plants or some enterprises, the reverse absorption method of spraying lye in the dust removal and desulfurization tower is usually used at present. The traditional way is to use Ca(OH) 2 SO in lye and raw flue gas 2 Ca(SO3) is generated after the reaction 2 and CaSO 2 sewage. Since there are many capillary paths in the dust removal and desulfurization tower, the Ca(OH) 2 The lye is slightly soluble in water, and it is easy to scale in the dust removal and desulfurization tower, causing the dust removal and desulfurization tower to be blocked and unable to work normally, so Ca(OH) 2 The desulfurization method of lye is not suitab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/50B01D53/62B01D53/96B01D47/00
Inventor 李学良
Owner GONGYI LIANGHUI ENVIRONMENTAL PROTECTION MACHINERY EQUIP FACTORY
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