Sulfuric acid tail gas recovery device

A technology of sulfuric acid tail gas and recovery device, which is applied in the fields of sulfur compounds, inorganic chemistry, dispersed particle separation, etc., can solve the problems of absorbents that cannot be recycled or used, and achieve the effect of improving the recycling rate and realizing the recycling utilization.

Inactive Publication Date: 2015-02-25
SHAANXI HUALU CHEM ENVIRONMENTAL PROTECTION
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  • Abstract
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Problems solved by technology

liquid SO 2 , after liquefaction, the absorbent in the absorption device cannot be recycled, and t

Method used

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  • Sulfuric acid tail gas recovery device

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[0014] Specific embodiment: as shown in the figure is a schematic diagram of the structure of the device of the present invention, sulfuric acid tail gas enters the absorption tower 1, SO in the tail gas 2 Absorbed by the solvent in the absorption tower 1, the tail gas after desulfurization is vented from the top of the tower to absorb SO 2 The latter rich liquid enters the lean / rich liquid heat exchanger 5 through the rich liquid pump 3 through the rich liquid pipeline at the bottom of the tower, and enters the upper part of the regeneration tower 6 after heat recovery. The rich liquid enters from the upper part of the regeneration tower 6, and part of SO is desorbed by stripping. 2 , And then enter the reboiler 7, so that the SO 2 Further desorption, desorption of SO 2 Together with the water vapor after being cooled by the condenser 9, the water is removed by the gas-liquid separator 10 to obtain pure SO 2 , The condensed water separated by condensation is sent to the top of the...

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Abstract

The invention relates to a sulfuric acid tail gas recovery device, belonging to the treatment field of waste gas in industrial production and in particular relates to waste gas treatment in sulfuric acid production. The invention provides a sulfuric acid tail gas recovery device which can use absorbing agents circularly and can be used for low-concentration SO2 concentration retreatment, aiming at solving the problems that in the existing treatment equipment, after waste gas is liquefied, absorbing agents in a sulfuric acid absorption apparatus device cannot be reutilized, and low-concentration SO2 generated during liquification cannot be utilized. The device comprises an absorption tower communicated with a sulfuric acid tail gas inlet, wherein a liquid-enriched pipeline is arranged at the lower end of the absorption tower and is communicated with the upper end of a regeneration tower by a liquid-enriched pump, the regeneration tower is connected with a reboiler, and the regeneration tower is sequentially communicated with a condenser and a gas-liquid separator. The sulfuric acid tail gas recovery device can circularly utilize the absorbing agents in the absorption tower, the low-concentration SO2 can be subjected to concentration retreatment, and the treatment efficiency is improved.

Description

technical field [0001] The invention belongs to the field of waste gas treatment in industrial production, in particular to waste gas treatment in sulfuric acid production. Background technique [0002] In the production of sulfuric acid, the waste gas often contains sulfur dioxide gas, which is harmful to the environment and human body, and needs to be treated before being discharged. At present, in the production of sulfuric acid, low concentrations of SO are produced. 2 They are all direct emissions, only producing high concentrations of SO 2 Absorb SO through absorption device when exhaust gas 2 , and then through chemical action or liquefaction. liquid SO 2 , after liquefaction, the absorbent in the absorption device cannot be recycled, and the low concentration of SO produced in the liquefaction process 2 Weaknesses that cannot be exploited. Contents of the invention [0003] The purpose of this invention is to provide a kind of can to low concentration SO 2 A ...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50C01B17/56
Inventor 陆强
Owner SHAANXI HUALU CHEM ENVIRONMENTAL PROTECTION
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