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Method for improving sulphur dioxide clearance

A sulfur dioxide and removal rate technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of high operating cost and low efficiency, and achieve large processing capacity, high processing efficiency, and low operating cost Effect

Inactive Publication Date: 2009-09-09
黄立维
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of air oxidation has low efficiency and high operating costs.

Method used

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  • Method for improving sulphur dioxide clearance
  • Method for improving sulphur dioxide clearance
  • Method for improving sulphur dioxide clearance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The absorption tower used in the present invention is a spray tower 5, the lower part of the spray tower is provided with an air inlet 4, the liquid outlet 9 of the absorption tower, the top of the spray tower is provided with an air outlet 7, and the upper part of the spray tower is provided with an absorption tower liquid inlet Port 6, between the absorption tower liquid inlet 6 and the air inlet 4 is a reaction chamber, and the bottom of the spray tower is a circulation tank 2, and the circulation tank is not directly connected with the reaction chamber, and the circulation tank is provided with Drain port 3; the liquid outlet 9 of the absorption tower communicates with the liquid inlet 11 of the electrocatalytic oxidation reactor 12 provided with a valve in the electrocatalytic oxidation reactor 12, and the top of the electrocatalytic oxidation reactor is also provided with a connection with the reaction chamber The gas communication pipe 8 connected to the room, the...

Embodiment 2

[0045] Embodiment 2: other conditions are the same as embodiment 1, pulse power supply, pulse frequency is 100Hz, average current density 8A / dm 2 .

[0046] The experimental results are shown in Table 2.

[0047] Table 2

[0048]

Embodiment 3

[0049] Embodiment 3: other conditions are with embodiment 1, and absorbent changes concentration into 100g / L calcium chloride solution, and experimental result is as shown in table 3:

[0050] table 3

[0051]

[0052]

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Abstract

The invention relates to a method for improving the removal rate of sulfur dioxide in waste gas. In an absorption tower, water-soluble hydrochloride is used as an absorbent, and the gas containing sulfur dioxide is introduced into the absorption tower, and the sulfur dioxide in the gas is absorbed. agent to absorb and generate absorption liquid containing sulfite ions, and then part of the absorption liquid is passed into the electrocatalytic oxidation reactor for electrolytic oxidation to generate chlorine and hypochlorite ions. The electrocatalytic oxidation reactor is also equipped with a gas-phase The chlorine supply gas that passes through is passed into the gas connecting pipe of the absorption tower, and the sulfite ion is finally oxidized into sulfate ion by chlorine gas, hypochlorite ion or absorbent, and the electrolytic oxidation reaction liquid phase generates hydrochloride and then returns to the absorption tower recycle. The method has high absorption efficiency, does not need to add oxidant and feed air, has low operation cost, high treatment efficiency and large treatment capacity, and is suitable for popularization and use.

Description

(1) Technical field [0001] The invention relates to a method for improving the removal rate of sulfur dioxide in waste gas, in particular to wet SO 2 Exhaust gas treatment technology. (2) Background technology [0002] Sulfur dioxide (SO2) produced by human activities 2 ), of which, more than 90% are produced by fuel combustion, followed by processes such as metallurgy, sulfuric acid production, oil refining, and sulfonation reactions in chemical and pharmaceutical industries. SO 2 Toxic to humans, it is moderately poisonous and strongly irritating to the eyes and respiratory tract. Inhalation of high concentrations of sulfur dioxide can cause laryngeal edema, pulmonary edema, vocal cord edema and / or convulsions leading to suffocation. A large amount of sulfur dioxide emission is the main cause of acid rain in the atmosphere. Statistics in the 2006 China Environmental Status Bulletin show that acid rain pollution in cities in my country has increased in recent years. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/50B01D53/78B01D53/96
Inventor 黄立维
Owner 黄立维
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