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Technology for treating high concentration ammonia nitrogen waste water using membrane based absorption method

An ammonia nitrogen wastewater, membrane-based absorption technology, applied in membrane technology, water/sewage treatment, neutralized water/sewage treatment, etc., can solve the problem of less engineering research and other issues

Inactive Publication Date: 2004-11-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Some basic theories about membrane-based absorption have been fully studied, but there are relatively few studies on engineering issues related to practical applications.

Method used

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  • Technology for treating high concentration ammonia nitrogen waste water using membrane based absorption method
  • Technology for treating high concentration ammonia nitrogen waste water using membrane based absorption method
  • Technology for treating high concentration ammonia nitrogen waste water using membrane based absorption method

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Embodiment 1

[0057] The present invention is actually applied in a certain coking plant to treat "surplus ammonia water". A coking plant mainly produces coke and gas, and recovers tar, benzene, naphthalene and other chemical by-products. A large amount of wastewater is generated during the production process, among which the so-called "residual ammonia water" produced during the pyrolysis of coal and the cooling of raw gas is the main source of wastewater. The characteristics of the remaining ammonia water are: (1) the amount of water is large, accounting for more than half of the waste water in the whole plant; (2) the water quality is complex, and the components are various. In addition to inorganic pollutants such as ammonia, cyanide, and thiocyanate, it also contains phenol , oils, naphthalene, pyridine, quinoline, anthracene and other condensed ring aromatic compounds, etc. (3) The concentration of pollutants is high, among which NH 3 Up to 3000-5000mg / L, COD Cr The content is betwe...

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Abstract

A process for reclaiming high concentration ammonia nitrogen waste water by film based absorption wherein a hollow fiber film contactor is employed, the high concentration ammonia nitrogen waste water flows through the tube pass of the contactor, i.e. the lumen of hollow fiber, while the absorption solution H2SO4 flows through shell pass. When applied to treatment for high concentration residual ammonia in coking plant, the invention achieves the effect of one time discharge standard meeting, with the ammonia clearance reaching 99.7% in the water outlet, and the ammonia recovery ratio in the absorbing agent reaching 99.5%.

Description

technical field [0001] The invention relates to recovering ammonia in high-concentration ammonia-nitrogen wastewater by using a membrane-based absorption technology. Background technique [0002] As we all know, the eutrophication problem of my country's oceans, rivers, lakes and reservoirs is relatively prominent. The main cause of water eutrophication is excessive nitrogen, phosphorus and related pollutants in the water body. A large amount of high-concentration ammonia-nitrogen wastewater discharged from nitrogen fertilizer plants is one of the main sources of pollution. my country currently has more than 1,000 large, medium and small nitrogen fertilizer plants, which discharge about 4 billion tons of wastewater every year, and the total amount of ammonia nitrogen discharged is more than 300,000 tons. Obviously, the water pollution caused by nitrogen fertilizer factory wastewater is relatively serious. my country has listed ammonia nitrogen as one of the control indica...

Claims

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Application Information

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IPC IPC(8): B01D69/04B01D71/26C02F1/58C02F1/66
Inventor 陈坚沈志松朱振中郝卓莉
Owner JIANGNAN UNIV
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