Process for treating ammonia-nitrogen waste water

Abstract

A method for treating ammonia nitrogen wastewater is disclosed. The ammonia nitrogen wastewater is firstly filtered by a membrane filter, and dilute ammonia water filtered out is processed by isobaric pressure recycling to prepare concentrated ammonia water which is carbonized to produce ammonium bicarbonate. Trapped solution is firstly hydrolyzed to extract Kana alkali, and organic wastewater which contains ammonia nitrogen and is produced by the recycling of the trapped solution is used for preparing coal water slurry; the coal water slurry prepared, the concentration of which is 60 percent, together with pure oxygen by air separation are gasified and cracked at the temperature of 1350 DEG C to 1450 DEG C and the pressure of 1.3 MPa to produce CO, CO2, H2, N2 and water gas with trace amount of hydrogen sulfide; by changing the process, CO and water vapor react and produce CO2 and H2; trace amount of hydrogen sulfide is removed by carrying out desulfurization by a wet process; some gas is treated by carbonization process to remove CO2, and ammonium carbonate is produced at the same time. The left gas is treated by PSA hydrogen-extraction process to prepare high-purity hydrogen as finished product or for preparing product liquid ammonia. The method of the invention changes waste into valuable and requires low operating cost.

Description

technical field [0001] The invention relates to a method for treating ammonia nitrogen wastewater Background technique [0002] In the production of amikacin, the treatment of ammonia-nitrogen wastewater is very important. If the treatment of ammonia-nitrogen wastewater cannot meet the requirements, it will not only pollute the environment, but also affect the comprehensive recycling and utilization of the high-energy-consuming product kanarine in the wastewater. [0003] At present, my country's ammonia nitrogen wastewater treatment methods generally include physical and chemical methods, combined biochemical methods, and new biological nitrogen removal methods. The above processes all have disadvantages such as complex process, large investment, immature technology, difficulty in control, secondary pollution, and high operating costs. How to economically and effectively treat high-concentration ammonia-nitrogen wastewater and low-concentration ammonia-nitrogen wastewater t...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of ammonia nitrogen wastewater treatment with advanced technology, simple and easy process, low operating cost and less waste discharge in view of the above-mentioned problem of not being able to effectively treat high-concentration ammonia nitrogen wastewater and low-concentration ammonia nitrogen wastewater. method

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