Device for processing high-concentration ammonia nitrogen in rare-earth wastewater by using surfactant

Abstract

The invention relates to a device for processing high-concentration ammonia nitrogen in a rare-earth wastewater by using a surfactant, and belongs to the field of sewage treatment. The device comprises an air compressor (1), a high-pressure pump (2), a high-pressure steam pump (3), a heat exchanger (4), a first-stage denitrification device (5), a second-stage denitrification device (6), a catalytic reduction pot (7), quartz glass fiber membranes (8), a heavy metal catalyst (9), a draught fan (10), an air outlet (11), a spray tank (12) and a wastewater outlet (13); the air compressor (1), the high-pressure pump (2), the high-pressure steam pump (3) and the heat exchanger (4) are connected with one another; and the quartz glass fiber membranes are arranged inside the first-stage denitrification device (5) and the second-stage denitrification device (6). The quartz glass fiber membranes adopt hollow fiber membrane elements, the fibers are evenly distributed, and are fine and smooth in grain and strong in hydrophilicity, the device is simple to operate, and high in removal rate, the production cost is saved, the ammonia nitrogen removal rate of the high-concentration ammonia nitrogen wastewater which is processed by the device reaches over 99.9%, and the environmental pollution is greatly relieved.

Description

technical field [0001] The invention discloses a device for treating high-concentration ammonia nitrogen in rare earth wastewater with a surfactant, and belongs to the field of sewage treatment. Background technique [0002] There are many kinds of rare earth minerals in my country, and the smelting process is relatively complicated. The production process produces a large amount of waste water. Every 1 ton of rare earth oxide produced produces 60-100 tons of waste water, mainly including acidic fluorine-containing waste water, alkaline fluorine-containing waste water, and rare earth extraction and separation saponification organic phase The ammonia nitrogen wastewater produced during the rare earth precipitation process with ammonium bicarbonate, among which the pollution problem of ammonia nitrogen wastewater is particularly prominent. The ammonia nitrogen in the wastewater exceeds the standard by dozens or even hundreds of times, which has brought serious pollution to the e...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of large pollution, high cost and low ammonia nitrogen removal rate in the existing technical solutions, and to provide a device for treating high concentration ammonia nitrogen in rare earth wastewater with surfactants, which can effectively remove high concentration ammonia nitrogen in rare earth wastewater , which solves the problems of heavy pollution, high cost and low removal rate of ammonia nitrogen in the prior art

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