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Cleaning treatment method and apparatus for malodorous gas

A technology for purification and treatment of malodorous gases, applied in the direction of gasification substances, deodorization, irradiation, etc., can solve the problems of low treatment effect, large investment, and small application range, and achieve the effect of improving treatment efficiency and treatment capacity

Inactive Publication Date: 2009-02-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Odor gas has a wide range of influence and is difficult to deal with. Although there are various deodorization technologies at present, most of them are not yet mature and perfect. Either there are problems of small adaptability, low treatment effect, and large floor area, or there is a large investment. , high operating costs, complicated management and operation, and easy to produce secondary pollution

Method used

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  • Cleaning treatment method and apparatus for malodorous gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: Utilize the process and device of the present invention to process the malodorous pollutants discharged from a refinery

[0036] Odor pollutants discharged from a refinery include: sulfur, amines, hydrocarbons and phenols, among which the most important odor substances are hydrogen sulfide, low molecular mercaptans and sulfide dimethyl disulfide. The emission sources of these odorous pollutants are: sulfur recovery unit, desulfurization unit, hydrorefining unit, hydrocracking reaction and fractionation part, alkali washing unit, alkali slag treatment unit, sewage stripping, sewage treatment plant and sulfur-containing sewage, Acid gas, sulfur-containing dry gas, sulfur-containing liquefied gas, low-pressure gas system and various oil storage tanks, etc., have a wide distribution range and almost run through the entire refining production process. The concentrations of main odor pollutants are shown in Table 2.

[0037] Table 2 Concentration of odorous pol...

Embodiment 2

[0046] Embodiment 2: According to the device and process in embodiment 1, the pollutants discharged by a certain urban sewage treatment plant are processed

[0047] The odorous pollutants discharged by a sewage treatment plant in a certain city include: hydrogen sulfide, sulfides, ammonia, indoles, aldehydes, fatty acids, etc. The odor values ​​of each sewage treatment facility are shown in Table 3.

[0048] Table 3 Odor value of urban sewage treatment plants

[0049] pollution source odor value Fluctuation range Grille and pump room 80 35～130 grit chamber 60 30～90 Primary sedimentation pond 60 30～84 Biochemical reaction pool 45 25～100 Secondary sedimentation tank 20 15～30 Sludge dewatering room (belt type) 300 50～500 Sludge dewatering room (centrifugal) 100 50～200

[0050] The main treatment units that discharge malodorous pollutants are all closed or semi-closed, and introduced into the deodorization device o...

Embodiment 3

[0054] Embodiment 3: according to the device and process in embodiment 1, the pollutant discharged by a certain food processing factory is processed

[0055] The production process and sewage treatment process of a food processing factory will discharge a large amount of malodorous substances. The sources of malodorous gases are mainly fermentation tanks, heating tanks, and adjustment tanks, neutralization tanks, aeration tanks, mud storage tanks and dehydration machine rooms of the wastewater treatment system. . The odor values ​​of the main sources of malodorous gas are shown in Table 4.

[0056] Table 4 Odor value of a food factory

[0057] pollution source odor value Fluctuation range Fermentation workshop 280 30～600 heating workshop 160 20～350 Regulation pool 110 19～245 neutral pool 95 25～167 Aeration tank 82 34～196 Mud storage 350 80～690 Dehydration machine room 380 65～730

[0058] According to the surf...

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Abstract

The invention relates to a method for performing purification treatment on malodorous gases and a device carrying out the same. The ultraviolet light catalysis and ozone oxygenation technologies are optimally integrated to adapt to the treatment of the obnoxious gases with different concentrations and ingredients. Waste gas enters a spraying system to be washed by water or drugs, then is filtered and dried by a demisting device, enters an ultraviolet light catalysis and ozone oxygenation system, and finally is discharged at the top. The method for performing purification treatment on the malodorous gases and the device carrying out the same have the characteristics of less investment, low operation cost, small occupied area, high treatment efficiency, wide application scope and simple operation and management.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and environmental protection, and relates to a technical method for purifying and deodorizing the malodorous gas produced in the process of industrial production and sewage treatment, specifically a process of absorbing, oxidizing or degrading the malodorous substances in the exhaust gas by using physical and chemical methods and devices. Background technique [0002] Odor pollution is one of the seven typical public hazards, endangering people's health and the peace and comfort of life. So far, there are more than 4,000 kinds of odorous substances that are perceived by human sense of smell. Malodorous gases can be divided into five categories according to their composition. One is sulfur-containing compounds, such as hydrogen sulfide, mercaptans, sulfides, etc.; the other is nitrogen-containing compounds, such as ammonia, amines, amides, indoles, etc.; the third is halogens and their ...

Claims

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Application Information

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IPC IPC(8): A61L9/20A61L9/015A61L9/01A61L101/10
Inventor 赵伟荣李华靖
Owner ZHEJIANG UNIV
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