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A treatment method for malodorous gas in fishmeal processing

A technology of malodorous gas and treatment method, applied in the field of waste gas purification, can solve problems such as high cost, equipment corrosion, secondary pollution, etc., and achieve the effects of long service life, strong adsorption performance and convenient regeneration

Active Publication Date: 2018-03-27
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the masking method is economical and simple, it is not suitable for the removal of toxic and odorous gases; the water leaching method can remove water-soluble odorous gases, but it is difficult to remove insoluble odors; Although the purification efficiency of high-concentration and small-volume flammable gases is relatively high, it is easy to cause equipment corrosion and secondary pollution, fuel consumption, and high cost; the chemical oxidation method is mature in technology, stable in operation, and high in cost; the adsorption method is suitable for low Concentration and particle-free waste gas is not suitable for fishmeal production; biological method is a method of using microorganisms to degrade odorous gases, and has a good removal effect on water-soluble and biodegradable gas pollutants, but the operation process is not easy to control, and the operating cost high

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  • A treatment method for malodorous gas in fishmeal processing
  • A treatment method for malodorous gas in fishmeal processing

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Experimental program
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specific Embodiment 1

[0021] A treatment method for malodorous gas in fishmeal processing, such as figure 1 As shown, the malodorous gas in the fishmeal processing is sequentially processed through the condensation process and the gas-liquid separation process to obtain sewage and waste gas. The sewage can be treated in the sewage treatment tank, and the waste gas is sequentially processed by the pulsed strong light treatment device, low-temperature plasma treatment and active shells. Powder adsorption treatment can be.

[0022] In this specific embodiment, the condensation process includes a condensation system formed by sequentially connecting multi-stage indirect condensers, cooling towers, and circulating pumps. The gas-liquid separation process is completed through a gas-water separator. The treatment process of the sewage treatment pool adopts the microbial method for sewage treatment. The pulsed strong light processing device includes a trigger, an inert gas lamp, an energy storage capacit...

specific Embodiment 2

[0024] The T-VBN value of fishmeal processing raw materials can reach 277mg / 100g after being piled up for 48h under the harsh environment of 35℃. During the processing of fishmeal, a large amount of high-concentration malodorous gas will be produced. The malodorous gas is collected and transported to multi-stage indirect condensers through pipelines, and the temperature drops rapidly to about 35°C after indirect condensation.

[0025] Among them, most of the water vapor in the high-humidity malodorous gas condenses into water, and some odor components with water-soluble characteristics dissolve in the water, and flow into the sewage treatment tank through the gas-water separator. Wastewater is purified using microbial methods.

[0026] The malodorous gas after gas-water separation is transported to the pulsed strong light processing system through pipelines, the pulse width is adjusted to 5μs, the number of flashes is 7 times, and the light intensity is 6KJ / cm 2. Adjust the...

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Abstract

The invention discloses a method for treating malodorous gas produced during fish meal processing. The method is characterized by comprising the working procedures of condensation, gas-liquid separation, sewage treatment, pulse highlight treatment, low-temperature plasma treatment, active shell powder adsorption and the like. The condensation working procedure involves a multi-stage condensation system and a water circulation system. The separation working procedure is completed through a gas-water separator. In the sewage treatment working procedure, purification is carried out through a microbiological treatment method. The malodorous gas purification working procedure involves a pulse highlight treatment process, a low-temperature plasma treatment process and an active shell powder adsorption process. The method has the advantages that high-temperature high-humidity high-concentration malodorous gas produced ruing fish meal processing is comprehensively and thoroughly removed, gas emission on standard is achieved, the treatment capacity is large, the purification efficiency is high, energy consumption is low, secondary pollution is small, the process is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of exhaust gas purification, and in particular relates to a treatment method for malodorous gas in fishmeal processing. Background technique [0002] Fishmeal is a product made from the leftovers of aquatic product processing or low-value and non-edible aquatic raw materials through cooking, pressing, drying and other processing procedures. Affected by spoiled raw materials, it will release a large amount of volatile and toxic odors such as cadaverine, putrescine, trimethylamine, methyl mercaptan, methyl sulfide, and hydrogen sulfide under high temperature during cooking, pressing, and drying. substance. If the direct discharge of odorous gas from fishmeal processing seriously endangers the normal work and life of the surrounding residents. [0003] At the same time, compared with the malodorous gas in chemical and agricultural engineering, it has complex components (containing hundreds of organic substanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/74B01D53/72B01D53/58B01D53/52B01D53/48B01D53/54C02F3/34B01D53/32B01D53/04
CPCB01D53/48B01D53/485B01D53/52B01D53/54B01D53/58B01D53/72B01D53/74B01D2253/112B01D2259/80B01D2259/818C02F3/34Y02E50/30
Inventor 杨贤娄永江严小军唐道军宋美魏玖红魏丹丹朱艳超刘建刘婷
Owner NINGBO UNIV