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Method for treating tobacco leaf processing waste gas and recovering spice

A technology for waste gas treatment and tobacco leaf processing, which is applied in the direction of essential oil/fragrance, fat production, etc. It can solve the problems of limited working temperature range, polluted air, easy volatilization, etc., and achieves a wide range of absorption temperature, reliable operation and easy installation. Effect

Inactive Publication Date: 2014-12-10
KUNMING HUACHEN INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional process, these substances with high economic value are discharged into the atmosphere, which not only pollutes the air, but also causes great waste
[0003] Chinese patent application CN 102326859 A utilizes organic mixed liquid to directly absorb flavors and fragrances in exhaust gas at relatively low temperature, but the working temperature range of this kind of absorption liquid is limited, and it is easy to volatilize at normal temperature

Method used

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  • Method for treating tobacco leaf processing waste gas and recovering spice
  • Method for treating tobacco leaf processing waste gas and recovering spice
  • Method for treating tobacco leaf processing waste gas and recovering spice

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] like figure 1 and figure 2 As shown, the equipment of the present invention for recovering spices from flue-cured tobacco curing and tobacco factory exhaust gas comprises an air inlet 6 and an air outlet 4, an adsorption layer 5 is arranged between the air inlet 6 and the air outlet 4, and the adsorption layer 5 is made of anhydrous Sodium sulfate, sponge, quartz sand, glass fiber, carbon fiber cotton, activated carbon, macroporous resin, silica gel, calcium chloride and cellulose acetate absorbent 2 form the equipment for recovering spices, and the absorbent 2 can be extracted together with the adsorption layer 5, To facilitate pick-and-place and replacement; between the air inlet 6 and the adsorption layer 5, there is a dust removal net 1 for filtering dust particles, and a vibrator 7 is arranged on the dust removal net 1; an induced draft fan 3 is arranged at the air outlet 4, so as to avoid affecting the normal operation of the original equipment Out of the wind. ...

Embodiment 2

[0029] Install such as figure 2 The vertical absorption equipment is designed to be 2.2m high, 1m wide, and 0.5m thick, and each of the three sets of equipment uses 30kg of absorbent. The absorbent is composed of 4% anhydrous sodium sulfate, 4% sponge, 2% quartz sand, 5% glass fiber, 13% carbon fiber cotton, 42% activated carbon, 2% macroporous resin, 18% silica gel, and calcium chloride according to the percentage by weight. 9% and 1% cellulose acetate. About 3,500kg of fresh tobacco leaves are roasted in each oven, the working environment temperature of the absorbent is 25°C-60°C, and the flow velocity of the exhaust gas is 100,000 m 3 ~120000m 3 / Hour. After 14 hours of absorption, retrieve the absorbent. The recovered absorbent is eluted through an alcohol gradient with a concentration of more than 95% at normal temperature and pressure, then the absorbent is centrifuged and dried at 2000 rpm for 1-2 minutes, and the eluate is treated with molecular distillation and e...

Embodiment 3

[0031] Two sets of absorption equipment are placed in the leaf roasting settling chamber on the top floor of the leaf threshing and redrying workshop. The absorption equipment is designed as follows: figure 2 The vertical absorption equipment shown is 1.2m high, 0.6m wide, and 0.4m thick. Each set of equipment is put into about 20kg of absorbent. The absorbent consists of 2% sodium sulfate water, 2% sponge, 1% quartz sand, glass 2% fiber, 15% carbon fiber cotton, 50% activated carbon, 2% macroporous resin, 16% silica gel, 9% calcium chloride and 1% cellulose acetate. The temperature of the absorbent is 60°C-80°C, and the flow velocity of the exhaust gas is 80,000 m 3 ~100000m 3 / h. After 3.5 hours of absorption, retrieve the absorbent. The recovered absorbent is eluted through an alcohol gradient with a concentration of more than 95% at normal temperature and pressure, then the absorbent is centrifuged and dried at 2500 rpm for 4-5 minutes, and the eluate is treated with m...

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Abstract

The invention discloses a method for treating tobacco leaf processing waste gas and recovering spice. At a position in which the waste gas exhausted by tobacco curing and tobacco factory flows through, at least three adsorption layers spaced for certain distance are arranged between an air inlet and an air outlet; on each adsorption layer, anhydrous sodium sulfate, sponge, quartz sand, glass fiber, carbon fiber cotton, active carbon, macroporous resin, silica gel, calcium chloride and acetate fiber absorbent form recovery equipment; the absorbent is drawn out together with the adsorption layer; and an induced draft fan is arranged at the air outlet. According to the invention, various waste gases generated in tobacco leaf production are led into the recovery equipment; and when the gas flow passes through the equipment, the gas flow first goes through a dedusting net to leave various fine dust particles, and thus the dust pollution in production can be greatly reduced. Meanwhile, when the gas flows through the adsorption layer consisting of multiple absorbents, more than 15 small-molecular organic compounds are absorbed and then subjected to centralized treatment, useful substances are extracted, and atmospheric pollution caused by the organism discharge in production is avoided.

Description

technical field [0001] The invention belongs to the technical field of cigarette processing, and in particular relates to a method for treating waste gas from tobacco leaf processing and recovering spices. Background technique [0002] In the process of changing tobacco leaves from fresh state to cigarette production, with the continuous reduction of water content in tobacco leaves and changes in temperature, macromolecular compounds such as starch and chlorophyll in tobacco leaves undergo decomposition reactions under the action of enzymes, and a large number of aroma substances will be produced. It contains a large amount of esters, pyrroles, ketones, and organic acids. These compounds have a great influence on improving the taste of cigarettes. In the traditional process, these substances with high economic value are discharged into the atmosphere, which not only pollutes the air, but also causes great waste. [0003] Chinese patent application CN 102326859 A uses an or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/02C11B9/02
Inventor 夏谦王敬良李雪海胡亚明高岚
Owner KUNMING HUACHEN INVESTMENT
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