Recovery equipment of ammonia in ammonia-containing multi-phase mixed wastewater

Abstract

The invention relates to recovery equipment of ammonia in ammonia-containing multi-phase mixed wastewater. The recovery equipment is characterized by comprising ammonia-containing multi-phase mixed wastewater pretreatment equipment, steam stripping ammonia removal equipment and wet type washing equipment, wherein the steam stripping ammonia removal equipment has the function of performing steam stripping on ammonia in the ammonia-containing multi-phase mixed wastewater by using steam so as to separate out concentrated ammonia gas; the concentrated ammonia gas is exhausted out of a steam stripping tower to enter the wet type washing equipment; in the wet type washing equipment, cold water is used for absorbing ammonia gas at high efficiency to obtain concentrated ammonia water which is recovered and used as resources. The purified gas is exhausted from an outlet of an absorption tower; the wastewater subjected to ammonia removal descends to enter a water groove formed in the bottom of the tower; wastewater with other ingredients is discharged to enter a next treatment work procedure. The equipment is used for removing ammonia in the ammonia-containing multi-phase mixed wastewater ina steam stripping mode, so that the dangerous waste discharge is reduced. The equipment has the advantages that the efficiency is high; the energy is saved; the advantages of high economic value, high practicability, building simplicity, low cost, wide application range and the like are realized; in addition, the ammonia can be efficiently and safely recovered; the resource reutilization is realized.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a recovery device for ammonia in ammonia-containing multiphase mixed wastewater. Background technique [0002] With the rapid development of my country's chemical industry, metallurgy, petrochemical, pharmaceutical, food and other industries, the problem of ammonia-containing wastewater pollution has become more and more serious. The discharge of a large amount of ammonia-containing wastewater will lead to eutrophication of the water body, causing water pollution, seriously endangering people's health and affecting people's normal life. At the same time, the random discharge of a large amount of ammonia-containing wastewater is also a waste of resources. The pollutants of ammonia-containing wastewater are mainly free ammonia and ammonia in the form of ammonium salt. The commonly used treatment methods are: oxidation method, zeolite adsorption method, pressurized ammonia distilla...

AI Technical Summary

Problems solved by technology

This process needs to be fed with sulfuric acid and other acid liquids, which brings more complexity and risk to the operation; and the addition of a condensing device or a heat exchanger used in conjunction with other devices often has the disadvantage that the cooling speed is not fast enough, The efficiency of cooling is relatively low, and the recycling process is complicated

In addition, the steam stripping method also has problems such as large energy consumption.

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