Aluminum phosphide residue harmless treatment method and treatment device system

Abstract

The invention discloses an aluminum phosphide residue harmless treatment method and a treatment device system. The aluminum phosphide residue harmless treatment method comprises the following steps: 1) adding aluminum phosphide residues into a residue treatment container, and adding an alkaline chemical agent and water to carry out a reaction so as to obtain hydrogen phosphide gas and first residue slurry, wherein the alkaline chemical agent is an alkaline chemical agent dissolved into water to be reacted with aluminum hydroxide; 2) adding an oxidizing agent into the first residue slurry until no hydrogen phosphide escapes so as to obtain second residue slurry, wherein the oxidizing agent is an oxidizing agent reacted with the hydrogen phosphide; 3) adding an acid into the second residue slurry for performing pre-curing treatment so as to obtain third residue slurry, wherein the acid is an acid reacted with aluminum hydroxide; and 4) adding a curing agent into the third residue slurry for curing, thereby obtaining the massive condensate. According to the treatment method, aluminum phosphide residues can be safely, rapidly and completely treated in a fumigation warehouse on site, and the treated residues do not contain any aluminum phosphide residue.

Description

Technical field [0001] The invention relates to a harmless treatment method and a treatment device system for aluminum phosphide residues, and belongs to the technical field of aluminum phosphide residue treatment. Background technique [0002] Because of its high insecticidal efficiency and economic convenience, aluminum phosphide is the most commonly used fumigant in the food and tobacco industries. The aluminum phosphide residue is the residue after the fumigation of aluminum phosphide. The main component of the residue is aluminum hydroxide, and also contains additives such as magnesium stearate, paraffin wax, and ammonia carbamate. The commonly used aluminum phosphide on the market is a 56% aluminum phosphide tablet, which is difficult to completely react in the air, so the aluminum phosphide residue often contains a small amount of aluminum phosphide. When aluminum phosphide residue encounters clear water, acid, alkali, oxidizer, etc., it will continue to react, releasing ...

AI Technical Summary

Problems solved by technology

Physical landfill has problems such as polluting soil and occupying land. Due to the burial of aluminum phosphide residues all year round, most warehouses have no land to bury aluminum phosphide residues. Soaking, it is very prone to explosion accidents of aluminum phosphide residues

The high-temperature calcination method is limited by various objective conditions, and it is difficult to implement in the reservoir area. It often needs to be transported to a unit with hazardous chemical treatment qualifications for treatment. There is a long journey, and aluminum phosphide residues have occurred many times in China during the transportation process Dust pollution, explosion and personnel poisoning accidents

The method of treating aluminum phosphide residues by immersion in clear water can realize in-situ treatment and avoid dust pollution, explosion and personnel poisoning during transportation. However, wet treatment needs to be carried out in aqueous solution, so the residue after treatment is generally muddy. The treatment is not thorough enough, and the residue after treatment often contains excessive phosphine gas

[0004] Although the residue treatment patented technology of application number CN201410342967.8 adopts the chemical treatment method, since the oxidant and acid are mainly used in the early stage of treatment, it is easy to react violently with aluminum phosphide and cause explosion, which has a large potential safety hazard. The muddy aluminum phosphide residue is inconvenient to store, stack, transport and handle

Images