Triethylamine wastewater pretreatment system

Abstract

The invention belongs to the field of wastewater treatment, and particularly relates to a triethylamine wastewater pretreatment system, which comprises: a first pretreatment subsystem used for removing the calcium ions in the triethylamine wastewater; and a second pretreatment subsystem which is used for removing salt in the wastewater treated by the first pretreatment subsystem and adjusting theCOD value to be within a set range; wherein the first pretreatment subsystem is connected with the second pretreatment subsystem through a pipeline, and a triethylamine wastewater inlet is formed in the first pretreatment subsystem. The system has the beneficial effects that calcium in wastewater is removed by adopting the tubular micro-filtration membrane assembly, wherein the concentrated liquidgenerated by a membrane is subjected to dehydration treatment after being precipitated in the middle water tank; then the clear liquid generated by the membrane enters the water production tank, thecontent of calcium ions in the water production tank is detected, the concentration of the calcium ions is as low as 10 mg / L or below, and the problem of pipeline scaling caused by the calcium ions isavoided; therefore, the problem of efficiency reduction caused by evaporation is solved, and the hazardous waste output is reduced.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a triethylamine wastewater pretreatment system. Background technique [0002] Triethylamine, an organic compound, named N,N-diethylethylamine systematically, is a colorless and transparent liquid with a strong ammonia odor, which emits slight smoke in the air; soluble in water, soluble in ethanol, ether, The aqueous solution is weakly alkaline; flammable, explosive, toxic, and highly irritating; it is mainly used as a solvent, curing agent, catalyst, polymerization inhibitor, preservative, and synthetic dye in industry. [0003] However, the triethylamine wastewater produced in the production process is often high-concentration, high-salt, and highly polluted wastewater that is difficult to degrade. Because more lime is used in the production process, the wastewater contains a relatively high calcium ion content. If pretreatment The inability to effectively remove...

AI Technical Summary

Problems solved by technology

[0003] However, the triethylamine wastewater produced in the production process is often high-concentration, high-salt, and highly polluted wastewater that is difficult to degrade. Because more lime is used in the production process, the wastewater contains a relatively high calcium ion content. If pretreatment Calcium ions cannot be effectively removed, which brings greater difficulty to the subsequent evaporation and biochemical treatment, resulting in easy fouling of the pipeline and affecting the biochemical aeration system

Conventional pretreatment methods mostly directly use dosing coagulation and precipitation. This technology mainly has the following disadvantages: 1. The removal rate of calcium salts in water is not high, which can easily lead to evaporation structures and affect evaporation efficiency; 2. Dosing dosage Large, labor-intensive, high operating costs; 3. The amount of hazardous waste sludge produced is large, and the treatment cost is high

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