Method and device for treating malodorous flue gas

A flue gas treatment and odor technology, applied in the field of environmental science, can solve problems such as inability to achieve effective breakthrough in treatment technology, strong odor and odor, and achieve the effects of minimum operating cost, low equipment cost, and compact structure.

Active Publication Date: 2017-10-24
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention patent (patent number ZL 200510044968.5, publication number CN 1810731A) and the utility model patent (patent number ZL 200920027225.0, authorized announcement number CN 201419120Y) using the principle of electrostatic separation have achieved comparative Good treatment effect, more than 95% of the organic matter (more than 99% of the particulate matter) is separated, and the visual pollution of the smoke belt is eliminated, but it is powerless to the VOCs and SVOCs molecules in the saturated water vapor environment, which still exist after treatment Strong odor and odor, unable to achieve an effective breakthrough in governance technology

Method used

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  • Method and device for treating malodorous flue gas
  • Method and device for treating malodorous flue gas

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Experimental program
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Effect test

Embodiment 10

[0042] In the glutamic acid fermentation industry, the fermentation effluent formed after extraction of the product is rich in high SO 4 2- , high NH 3 -N, high COD. At present, organic-inorganic compound fertilizers are produced by spraying and granulating the fermentation waste liquid at 550°C after being concentrated, so that the fermentation waste liquid can be recycled. However, under high temperature conditions, the organic matter in the fermentation waste liquid is cracked The formation of organic aerosol substances, VOCs, SVOCs, and water vapor together form the spray granulation malodorous smoke. In this example, 100,000 m 3 / h Malodorous flue gas treatment equipment as an example:

[0043] A malodorous flue gas treatment device is composed of two parts: an organic aerosol particle pollutant separation part, and a VOCs and SVOCs molecular decomposition part.

[0044] The structure of the organic aerosol particle pollutant separation part is as follows: it includes...

Embodiment 2

[0056] Other is with embodiment 1, and difference is:

[0057]The conductive anode tube group is composed of a number of anode tubes arranged in parallel, and the shape is a round tube honeycomb type, and the diameter of the round tube honeycomb type is 300-400mm;

[0058] The hydrogen peroxide reaction liquid sprayer is a primary spray, and the spray liquid is hydrogen peroxide (H 2 o 2 ); the acidic reaction liquid sprayer is a secondary spray, and the spray liquid is a hydrochloric acid reaction liquid with a pH value of 4; the alkaline solution sprayer is a three-stage spray, and the spray liquid is calcium hydroxide with a pH value of 10 solution.

[0059] The gas velocity of the pores of the secondary reaction layer sieve plate is 15m / s; the gas velocity of the pores of the primary reaction layer sieve plate is 18m / s.

[0060] The iron-carbon filler is made of iron-carbon micro-electrolytic material, and the components of the iron-carbon micro-electrolytic material ar...

Embodiment 3

[0062] Other is with embodiment 1, and difference is:

[0063] The hydrogen peroxide reaction liquid sprayer is a primary spray, and the spray liquid is hydrogen peroxide (H 2 o 2 ); the acidic reaction liquid sprayer is a secondary spray, and the spray liquid is a nitric acid reaction liquid with a pH value of 5; the alkaline solution sprayer is a three-stage spray, and the spray liquid is an ammonia solution with a pH value of 8.

[0064] The gas velocity of the pores of the secondary reaction layer sieve plate is 20m / s; the gas velocity of the pores of the primary reaction layer sieve plate is 22m / s.

[0065] The iron-carbon filler is made of iron-carbon micro-electrolytic material, and the components of the iron-carbon micro-electrolytic material are: iron filings: activated carbon: rare earth metal: clay=85%: 13.8%: 0.2%: 1%, all % by mass; the diameter of the iron-carbon micro-electrolytic filler is 3.0 cm. The rare earth metal includes Pr, and the rare earth metal is...

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Abstract

The invention discloses a foul flue gas treatment device which consists of two parts, namely an organic aerosol particle pollutant separation part and a VOCs and SVOCs molecular decomposition part, wherein the organic aerosol particle pollutant separation part structurally comprises a nonmetallic housing in which a lower electrostatic separation gas collection chamber, a gas distributor and an upper electrostatic separation gas collection chamber are sequentially arranged; the VOCs and SVOCs molecular decomposition part structurally comprises a housing in which a lower organic matter decomposition gas collection chamber, a secondary reaction layer sieve plate, a primary reaction layer sieve plate, a hydrogen peroxide reaction liquid sprayer, a filler reaction area, an acidic reaction liquid sprayer, a partition plate, an alkali liquor absorption area and an upper organic matter decomposition gas collection chamber are sequentially arranged. The invention further provides a foul flue gas treatment method. When the foul flue gas treatment device is used for treating foul flue gas, the treatment efficiency of organic pollutants reaches over 95 percent, VOCs and SVOCs can be completely decomposed, and undesirable odor can be completely eliminated.

Description

technical field [0001] The invention relates to a malodorous flue gas treatment device and method, belonging to the field of environmental science and technology. Background technique [0002] At present, the high-temperature evaporation drying process is widely used in industrial production, such as: spray granulation of fermentation waste liquid in the amino acid industry, spray drying in the yeast industry, high-temperature drying of fertilizer industry products, and drying of dregs in the pharmaceutical industry. The common characteristics of these processes Yes: While the water is evaporating, the raw materials rich in organic matter are decomposed into small molecular substances VOCs (volatile organic compounds) or SVOCs (semi-volatile organic compounds) that are volatile and have peculiar smell (odor) under high temperature conditions. The higher the temperature , the stronger the odor, for example, at a temperature of 550°C, the organic waste liquid is sprayed and gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/74B01D53/44B03C3/04
CPCY02A50/20
Inventor 臧立华
Owner QILU UNIV OF TECH
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