Method for treating chemical industry region tail water film-filter concentration liquid

Abstract

The invention discloses a treating method of tail water membrane filtering condensation fluid in chemical industry park, the steps of which are that the pre-treated membrane filtering condensation fluid goes through a device filled with resinous adsorbent under the common temperature and a flow quantity of 0.5-8BV / h, the absorbed water can be discharged after neutralizing with small capacity of alkali, desorbing and regenerating the resin by natrium hydroxydatum solution with the flow capacity of the desorbing agent is 0.5-3.0BV / h, the high concentration desorbing fluid disposes safely and the low concentration desorbing fluid can be periodically used to preparing next pluralities of desorbing agent. The invention can reduce the COD of the membrane filtering condensation fluid from about 600mg / L to about 80mg / L and finally realizes reducing and harmlessness of the polluted things of the membrane filtering condensation fluid. After desorbing of the resin, the desorbing rate is lager than 96%. The invention has the advantages of simple process, convenient operation, economy and high effective and good practicality without secondary pollution.

Description

technical field [0001] The invention relates to a method for treating the concentrated liquid of tail water membrane filtration in a chemical industrial park, specifically, a method for treating the concentrated liquid of tail water membrane filtration in a chemical industrial park by using a resin adsorbent. Background technique [0002] At present, my country has become a key area for the transfer of chemical industry in the world. A large number of chemical parks have been built along the coast and along the river. It is closer to the treatment method of urban domestic sewage, so the tail water after treatment is still difficult to meet the standard stably and contains many organic poisons, which will have a serious impact on the receiving water body. In the treatment of tail water, nanofiltration and reverse osmosis are more common methods for the treatment and reuse of chemical wastewater, but at the same time, a large amount of concentrated liquid is produced, which has...

AI Technical Summary

Problems solved by technology

Among them, the coagulation-sedimentation method has the disadvantages of large amount of mud production and easy to cause secondary pollution; the chemical oxidation method has the disadvantages of poor treatment effect and high cost; due to the low calorific value of waste water, the application of incineration method is also limited; Evaporation and concentration method has higher treatment cost

At present, the application of resin adsorption method to treat the tail water membrane filtration concentrate of chemical industrial parks has not been reported in the literature, but the resin adsorption method for the treatment of landfill leachate membrane filtration concentrate has been studied. The concentrated solution of the waste water has a brown-black color, a COD of about 5000-6000mg / L, and a pH of about 7. The main components are humus-like substances and some heavy metal ions, and most of them come from domestic waste landfills. Small, in terms of composition and properties, it is very different from the tail water membrane filter concentrate in the chemical industry park