Cleaning treatment method of acid sewage storage tank discharging gas

A technology for acidic sewage and gas discharge, applied in the direction of heating water/sewage treatment, chemical instruments and methods, separation methods, etc., can solve the problems of high operating costs and complicated processes, and achieve the effect of low operating costs and simple equipment

Active Publication Date: 2010-09-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of this method is relatively complicated, a special absorbent is required, the operating cost is high, and the post-treatment of the absorbent is also a problem that needs to be solved

Method used

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  • Cleaning treatment method of acid sewage storage tank discharging gas
  • Cleaning treatment method of acid sewage storage tank discharging gas
  • Cleaning treatment method of acid sewage storage tank discharging gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An enterprise's sour water storage tank emits about 1000m3 of gas 3 / h, the composition of main odor pollutants is shown in Table 1. The extraction and condensation of the side line of the stripper is 3-stage condensation, in which the weight concentration of the condensed liquid ammonia in the third stage of condensation is about 30%, the concentration of hydrogen sulfide in the purified water by stripping is 5-15 mg / L, and the concentration of ammonia is 20-50 mg / L. The above two liquids are used as the absorption liquid for the purification treatment of the exhaust gas of the acidic water storage tank.

[0019] Table 1 Concentration of main odor pollutants in the discharge gas of acidic water storage tanks

[0020] Main types of odor

Odor species concentration (mg / m 3 )

hydrogen sulfide

100～12000

[0021] Main types of odor

Odor species concentration (mg / m 3 )

organic sulfide

10～2000

ammonia

...

Embodiment 2

[0026] According to the method described in Example 1, wherein the filler adopts Dg38 stainless steel saddle ring. The diameter of the first-stage eluting tower is 600mm, and the height of the packing layer is 2600mm. The eluent comes from the acidic water stripping ammonia gas condensate system, which is a mixed solution of the second-stage condensate and the third-stage condensate. , liquid-gas ratio 6~8L / m 3 ; The diameter of the second-stage elutriation tower is 700mm, the height of the packing layer is 3500mm, the eluent is stripped purified water, and the liquid-gas ratio is 12-15L / m 3 . The operating temperature of the first-stage rinsing and the second-stage rinsing is controlled at 35°C to 45°C. The eluent of the first-stage packed tower is recycled in the tower, and when the pH value of the eluent drops to 9, a new fractionated condensate is added. The eluent of the second-stage packed tower is not circulated. The effluent from both the first stage rinse and the ...

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Abstract

The present invention provides a purifying treating method of sour water storage tank discharging, belonging to waste gas cleaning treatment field. The sour water storage tank discharging of the invention is purified via twice leaching, the first leaching employs segregating liquid of the segregating course rich in ammonia in the stripped process of the sour water, the second leaching employs purified water or industrial water from the stripped process of the sour water. The invention organical combination the stripped process of the sour water and the purifying treatment process of the sour water storage tank discharging, achieves perfect purifying treatment effect. Further, leaching liquid after being washing does not need other treating process and any outside material, can realizes closed circuit operation, and generate no effect to outsides. The invention has simple equipment, lower cost and has no potential safety hazard.

Description

technical field [0001] The invention relates to a purification treatment method for discharge gas from acid sewage storage tanks, in particular to a purification treatment method for discharge gas from acid sewage storage tanks containing sulfide and ammonia in petroleum refining enterprises and some petrochemical enterprises. Background technique [0002] In petroleum refining enterprises and some petrochemical enterprises, a kind of acid sewage containing hydrogen sulfide, organic sulfur sulfide, ammonia, volatile organic compounds (VOC) and other pollutants will be produced. These sewage cannot be discharged directly, and water vapor is generally used to The hydrogen sulfide and ammonia are treated and recovered by the stripping method, and the purified water after stripping can be reused as process water or sent to the sewage treatment plant for further treatment and discharge. [0003] Acidic sewage stripping can generally adopt double-tower stripping process and single...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/14C02F1/04
Inventor 方向晨刘忠生郭兵兵任龙
Owner CHINA PETROLEUM & CHEM CORP
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