A waste water treatment system containing pyridine heterocyclic compounds and its process

Abstract

The invention provides a waste water treatment system containing pyridine heterocyclic compounds and a process thereof, comprising sequentially connected waste liquid storage tanks, fixed bed reactors, heat exchangers, packed absorption towers and primary water storage tanks; Set up a fixed-bed reactor containing a ruthenium-based catalyst, which is easy to undergo a reduction reaction with pyridine-containing heterocyclic compounds in the wastewater, and remove the nitrogen in the pyridine ring in the form of ammonia to achieve the purpose of removing pyridine-containing heterocyclic pollutants in the wastewater. It overcomes the problem that it is difficult to destroy the pyridine ring within 200°C when conventional catalysts are placed in the existing fixed-bed reactor, and improves the wastewater treatment effect. In addition, each reaction branch pipe of the present invention is equipped with a double-layer spiral insulation jacket to make the temperature distribution more uniform and avoid direct contact of heat with the side wall of the reaction branch pipe to cause local burning of the catalyst in the reaction branch pipe and affect its catalytic performance.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a waste water treatment system containing pyridine heterocyclic compounds and a process thereof. Background technique [0002] Pyridine and pyridine derivatives are a very important class of fine chemical raw materials or products, widely used in industrial solvents, medicine, pesticides, feed, dyes and other fields, known as the "chip" of heterocyclic medicines, pesticides and veterinary drugs. Due to its wide application, the presence of pyridine and pyridine derivatives can be detected in many industrial wastewaters. However, pyridine and pyridine derivatives often have odor and irritation, and some of them also have potential carcinogenicity, bioaccumulation or high migration, and have certain toxic effects on the human body and microorganisms in nature. Therefore, this type of organic wastewater can be efficiently removed. Significant. [0003] Du...

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Problems solved by technology

However, the pyridine ring contains nitrogen atoms, which will not only produce a large amount of CO during incineration 2 , will also form a large amount of NOx, which increases the tail gas treatment load and emission concentration of the incinerator, and at the same time, the incineration process also consumes a lot of energy. These defects limit the further development of incineration technology to a certain extent.

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