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Method and device for treating residues of aluminum phosphide tablet fumigation agent

A treatment method and treatment device technology, applied in the direction of aluminum chloride, aluminum halide, phosphate, etc., to achieve stable treatment effects, reduce waste liquid discharge, and avoid spontaneous combustion effects

Inactive Publication Date: 2014-10-08
中国人民解放军防化学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the actual problems existing in the treatment of aluminum phosphide residues in the prior art, and provides a method and device for treating aluminum phosphide tablet fumigant residues, and solves the existing problems through the integration of cyclic oxidation absorption-polymerization

Method used

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  • Method and device for treating residues of aluminum phosphide tablet fumigation agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 1kg aluminum phosphide tablet fumigant residue to polymerization reactor 1, turn on ADDX nitrogen source (gauge pressure 1 atm or more), pass through pipeline 7', replace the air in polymerization reactor 1 three times, and purge pipeline 1' and absorption tower with nitrogen 2. Turn off the nitrogen source. In storage tank 3, be 25% sodium chlorite solution (being made up of by 25g sodium chlorite, 100ml water) 100kg, setting absorption liquid input volume is 120ml / s-1200ml / s, by metering pump 5, The sodium chlorite solution is sent to the top of the absorption tower 2 through the pipeline 6', sprayed and absorbed, and returned to the storage tank 3 through the pipeline 5' for recycling. Under the condition of airtight air, add 2000ml of water to the polymerization reactor 1 in 5 times, open the nitrogen source at the same time, the flow rate is 50ml / s, and use nitrogen as the carrier gas to carry the phosphine gas generated in the polymerization reactor 1 through ...

Embodiment 2

[0038]1kg aluminum phosphide tablet fumigant residue is added to polymerization reactor 1, open ADDX argon gas source (gauge pressure is more than 1 atm), through pipeline 7 ', replace the air in polymerization reactor 1 three times, and purge pipeline 1 ' and with argon gas Absorption tower 2, shut off the argon gas source. In storage tank 3, be 60% sodium chlorite solution (being made up of 60g sodium chlorite, 100ml water) 100kg, set absorption liquid input volume to be 120ml / s-1200ml / s, by metering pump 5, The sodium chlorite solution is sent to the top of the absorption tower 2 through the pipeline 6', sprayed and absorbed, and returned to the storage tank 3 through the pipeline 5' for recycling. Under the condition of airtight air, add 2000ml of hydrochloric acid into the polymerization reactor 1 in 5 times, open the source of argon gas at the same time, the flow rate is 50ml / s, and use argon as the carrier gas to carry the phosphine gas generated in the polymerization r...

Embodiment 3

[0041] 1kg aluminum phosphide tablet fumigant residue is added to polymerization reactor 1, open ADDX helium source (gauge pressure 1atm above), through pipeline 7 ', replace the air in polymerization reactor 1 three times, and use helium purge pipeline 1 ' and Absorption tower 2, shut off the helium source. In storage tank 3, be 75% sodium chlorite solution (promptly by the sodium chlorite of 75g, 100ml water is mixed with) 100kg, set absorption liquid input volume to be 120ml / s-1200ml / s, by metering pump 5, The sodium chlorite solution is sent to the top of the absorption tower 2 through the pipeline 6', sprayed and absorbed, and returned to the storage tank 3 through the pipeline 5' for recycling. Under the condition of airtight air, add 2000ml of water into the polymerization reactor 1 in 5 times, open the helium source at the same time, the flow rate is 50ml / s, and use helium as the carrier gas to carry the phosphine gas generated in the polymerization reactor 1 through ...

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Abstract

The invention discloses a method and a device for treating residues of an aluminum phosphide tablet fumigation agent. A gas conveying tube on a polymerization reactor is utilized to feed generated hydrogen phosphide gas into an absorbing tower; the absorbing tower adopts counter-current operation; an absorbing liquid is sprayed from the top of the tower, the hydrogen phosphide gas enters from the bottom of the tower; a 25-75wt% sodium chlorite absorbing liquid is stored in a storage slot; the absorbing liquid is fed into the absorbing tower so as to be circulated and absorbed by a pump; a pollution-free phosphate liquor is formed after the absorbing liquid is statured, and can be used as an agricultural fertilizer; after being hydrolyzed in the polymerization reactor, the aluminum phosphide residues are polymerized at 65-75 DEG C under normal pressure and enter a separator, so that auxiliary materials are separated out, the pH of the filtrate is regulated to obtain a polymerized aluminum chloride water treating agent which can be directly sold as a product; the separated waste residues are harmless talcum powder or magnesium stearate which can directly enter soil. The method and the device disclosed by the invention have the advantage that the residues of the aluminum phosphide tablet fumigation agent are completely treated in a harmless manner.

Description

technical field [0001] The invention relates to a method and a device for treating aluminum phosphide tablet fumigant residue, belonging to the technical field of pollution prevention and control. Background technique [0002] Aluminum phosphide is an important fumigant in the fumigation process of ships, and its active ingredient is phosphine formed by the reaction of aluminum phosphide and water. Phosphine is a highly toxic, efficient, and broad-spectrum fumigating and insecticidal gas. The gas is heavier than air and has a fish-like smell. Inhalation of phosphine can cause effects on the heart, respiratory system, kidneys, gastrointestinal system, nervous system and liver. Inhalation of low concentrations can cause tearing, lung irritation, shortness of breath, coughing, lung congestion. During the use of aluminum phosphide in fumigation, the final reaction product (residue) and the scrapped aluminum phosphide agent still contain different proportions of unresolved alu...

Claims

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Application Information

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IPC IPC(8): C01B25/26C01F7/56
Inventor 段圣亮王相承李德斌齐秀丽李丹李宝亭邵卫东
Owner 中国人民解放军防化学院
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