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Petrochemical acidic tail gas treatment system

A technology of acid tail gas and treatment system, which is applied in the direction of gas treatment, chemical instruments and methods, membrane technology, etc., can solve the problems of high investment, tail gas emission, environmental pollution, etc., and achieve the effect of reducing investment and reducing floor space

Inactive Publication Date: 2016-09-21
BEIJING HUAFU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic small and medium-sized enterprises will directly discharge exhaust gas into the atmosphere due to high investment, seriously polluting the environment

Method used

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  • Petrochemical acidic tail gas treatment system

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Effect test

specific Embodiment approach

[0012] The petrochemical acid tail gas treatment system of the present invention, its preferred embodiment is:

[0013] Including heat exchanger, lye absorption tower, water washing tower, lye pool, lye pump, alkali washing liquid circulation pump, water washing liquid circulation pump, process water pump and water tank;

[0014] Described lye absorption tower links to each other with the bottom of water washing tower, and the bottom of described lye absorption tower is provided with alkali washing liquid storage area, and the bottom of described water washing tower is provided with water washing liquid storage area, and described alkali washing liquid storage area It is lower than the water washing liquid storage area, and the water washing liquid storage area is provided with an overflow port towards the alkaline washing liquid storage area;

[0015] The alkali washing liquid storage area is connected to the alkali liquid absorption tower through the alkali washing liquid ci...

specific Embodiment

[0068] Such as figure 1 As shown, the acid tail gas is the middle and high temperature exhaust gas containing chlorine and sulfur discharged from petrochemical and coal chemical production equipment, in which the content of hydrogen chloride is 0.3-0.5v%, the content of sulfur dioxide is 0.03-0.04v%, and the content of chlorine is 0.05-0.08v %. The tail gas containing chlorine and sulfur in the heat medium is heated to 80 degrees by the phase change heat exchanger E-1, and then enters from the top of the Venturi lye absorption tower 2, and the softened water in the cold medium is heat-exchanged to generate 0.4MPa steam. Sending device or Air for the instruments inside the device.

[0069] The lye pump P-1 extracts the NaOH aqueous solution with a mass fraction of 12% from the lye pool V-4 to the lye absorption tower T-2 bottom that contains sodium sulfite and sodium chloride and is transported by the alkali washing liquid circulation pump P-2. The liquid is mixed and sent to...

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Abstract

The invention discloses a petrochemical acidic tail gas treatment system, comprising a heat exchanger, an alkali liquor absorption tower, a water washing tower, an alkali liquor pool, an alkali liquor pump, an alkali washing liquid circulating pump, a water washing liquid circulating pump, a process water pump and a water tank, wherein the alkali liquor absorption tower is connected with the lower part of the water washing tower, the bottom of the alkali liquor absorption tower is provided with an alkali washing liquid storage area, the bottom of the water washing tower is provided with a water washing liquid storage area, the alkali washing liquid storage area is lower than the water washing liquid storage area, and an overflow holes facing to the alkali washing liquid storage area is formed in the water washing liquid storage area; the alkali washing liquid storage area is connected with the alkali liquor absorption tower by means of the alkali washing liquid circulating pump, so that a circulation loop is formed; the water washing liquid storage area is connected with the water washing tower by means of the water washing liquid circulating pump, so that another circulation loop is formed; the alkali liquor pool is connected with the alkali liquor absorption tower by means of the alkali liquor pump; the water tank is respectively connected with the heat exchanger, the alkali liquor absorption tower and the water washing tower by means of the process water pump. The system relies on the power obtained from a venturi absorption tower by gases and the performances of the gases, thus reducing the floor area occupied by equipment, and reducing investment.

Description

technical field [0001] The invention relates to a petrochemical energy-saving and environmental protection technology, in particular to a petrochemical acid tail gas treatment system. Background technique [0002] Regeneration tail gas of dehydrogenation projects in petrochemical industry contains HCl and SO 2 and Cl 2 Such acid gas pollutants are discharged into the atmosphere and seriously pollute the environment, and must be removed to meet environmental protection standards before being discharged into the atmosphere. Domestic small and medium-sized enterprises will directly discharge exhaust gas into the atmosphere due to high investment, seriously polluting the environment. Contents of the invention [0003] The purpose of the present invention is to provide a petrochemical acid tail gas treatment system with simple process, energy saving, environmental protection, less land occupation and good treatment effect. [0004] The purpose of the present invention is ach...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/68B01D53/50B01D53/52
CPCB01D53/78B01D53/501B01D53/523B01D53/68B01D2251/304B01D2251/604B01D2257/2025B01D2257/2045B01D2257/302B01D2257/304
Inventor 金圃明
Owner BEIJING HUAFU ENG
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