Process and system for recycling high-concentration waste liquid containing aluminum phosphate and triethylamine

Abstract

The invention discloses a process for recycling high-concentration waste liquid containing aluminum phosphate and triethylamine and a system thereof, wherein the process comprises a first pH adjustingsystem, a second pH adjusting system, a third pH adjusting system, a ZRF1 system, a ZRF2 system, a ZRF3 system, a ZRF4 system, a ZRF5 system, a ZRF6 system, a ZRF7 system, a chemical phosphorus removal system, a triethylamine recovery system and a phosphoric acid recovery system; the process steps are reasonable, and the high concentration waste liquid containing aluminum phosphate and triethylamine is concentrated, separated and reused, at the same time, the phosphate ion in the waste liquid is separated and the phosphoric acid and triethylamine are recovered and the triethylamine is separated and recovered; then water is reused after the water reaches the tap water standard, so that the waste liquid disposal fee is greatly reduced, and the recycling and reuse of resources in the waste liquid is realized; environmental protection is facilitated, water resources are saved, and economic benefits are brought.

Description

technical field [0001] The invention relates to the technical field of waste liquid concentration, separation, recycling and reuse, in particular to a recovery and reuse process and system for high-concentration waste liquid containing aluminum phosphate and triethylamine. Background technique [0002] In the industrial production process of new catalyst materials and aluminum material pretreatment, a large amount of high-concentration waste liquid containing aluminum phosphate and triethylamine is produced. The waste liquid contains a large amount of phosphate ions, organic substances, organic amines, aluminum salts, etc. These pollution factors have seriously polluted the environmental water body. A large amount of phosphate ions and organic amines discharged into the water body will cause eutrophication of the water body and cause secondary pollution to the environment. As a surfactant, triethylamine is toxic and highly irritating. , causing great environmental pollution....

AI Technical Summary

Problems solved by technology

[0002] In the industrial production process of new catalyst materials and aluminum material pretreatment, a large amount of high-concentration waste liquid containing aluminum phosphate and triethylamine is produced. The waste liquid contains a large amount of phosphate ions, organic substances, organic amines, aluminum salts, etc. These pollution factors have seriously polluted the environmental water body. A large amount of phosphate ions and organic amines discharged into the water body will cause eutrophication of the water body and cause secondary pollution to the environment. As a surfactant, triethylamine is toxic and highly irritating. , causing great environmental pollution

[0003] At present, production enterprises entrust qualified professional companies to treat this kind of waste liquid as hazardous waste. The treatment process generally uses heating, distillation and concentration to recover phosphoric acid, which consumes a lot of energy and requires high equipment. At the same time, during the distillation process, organic amines volatilize, and other The concentration of COD and ammonia nitrogen in the condensed water is extremely high, and it is necessary to remove organic matter and ammonia nitrogen. At the same time, the aluminum plasma contained in the waste liquid affects the recovery of phosphoric acid. The operation cost of the whole process is high, and the equipment cost is high.

The traditional process generally uses extraction and distillation to remove triethylamine in waste liquid, but since triethylamine is easy to form stable colloidal substances with phosphorus in water, it is difficult to remove triethylamine in wastewater by direct extraction and distillation.

At the same time, the waste liquid is rich in aluminum ions. If aluminum ions are removed by chemical precipitation, organic amines will decompose into ammonia molecules, making it difficult to remove ammonia nitrogen and total nitrogen.

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