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Process for removing PH3 from residual gas after fumigant insect killing

A technology of residual gas and gas distributor, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., to achieve the effect of simple process and equipment, convenient operation and high efficiency

Inactive Publication Date: 2002-12-25
SHANGHAI TOBACCO GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the biggest defect of the adsorption method is that when the adsorption reaches saturation, if it is not treated, the solid adsorbent and the adsorbed harmful components will become three wastes together. If it is regenerated, the toxic gas will be released again.

Method used

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  • Process for removing PH3 from residual gas after fumigant insect killing
  • Process for removing PH3 from residual gas after fumigant insect killing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 1000ml of saturated bleaching powder solution (solvent is deionized water), and add it into the absorption tower with a diameter of ф70mm and a height of h=500mm. The operating conditions are as follows: normal temperature and normal pressure; the air velocity of the absorption tower is 70mm / s; the inlet pH 3 The concentration is 180ppm. Result: Export PH 3 It can't be detected by the specific length tube test method and chemical analysis method, that is, it is close to zero.

Embodiment 2

[0024] Take 600ml of saturated bleaching powder solution (solvent is deionized water) and 400ml of deionized water, and add them together into an absorption tower with a diameter of ф70mm and a height of h=500mm. The operating conditions are as follows: normal temperature and normal pressure; the air velocity of the absorption tower is 93mm / s; the inlet pH 3 The concentration is 240ppm. Result: Export PH 3 It can't be detected by the specific length tube test method and chemical analysis method, that is, it is close to zero.

Embodiment 3

[0026] Take 80g of bleaching powder, dissolve it in 1000ml of tap water, and add it into an absorption tower with a diameter of ф70mm and a height of h=500mm. The operating conditions are as follows: normal temperature and normal pressure; the air velocity of the absorption tower is 36mm / s; the inlet pH 3 The concentration is 360ppm. Result: Export PH 3 It can't be detected by the specific length tube test method and chemical analysis method, that is, it is close to zero.

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Abstract

A process for removing PH3 from the residual air after fumigant insect-killing is characterized by that the aqueous solution of high-content bleaching powder is used in tower for chemical absorption.Its advantages are simple process and equipment, low cost and high effect.

Description

technical field [0001] The invention relates to a treatment method for fumigation and insecticide residue gas, in particular to a method containing toxic gas pH 3 The treatment method of fumigation and insecticidal residual gas. Background technique [0002] At present, aluminum phosphide tablets are generally used for fumigation and insecticide in tobacco warehouses and grain warehouses. After dosing, the moisture in the air will decompose with it to produce highly toxic phosphine (PH 3 ) gas, so as to play an insecticidal effect. But after the fumigation, the remaining PH 3 The gas will naturally diffuse into the warehouse and the surrounding air, which will have adverse effects on the working conditions of the operators, the quality of life of the surrounding residents, and the ecological environment of the adjacent areas. [0003] PH for fumigation and insecticide residual gas 3 There are very few patents on purification treatment. The well-k...

Claims

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Application Information

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IPC IPC(8): B01D53/46B01D53/78
Inventor 丁百全房鼎业朱进前徐周
Owner SHANGHAI TOBACCO GRP CO LTD
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