Device and method for treating organic industrial wastewater based on cavitation technique
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A waste water and cavitator technology, which is applied in the field of waste water equipment, can solve the problems of waste water pollution, DNT loss, etc., and achieve the effects of reducing sludge volume, improving digestion rate, and facilitating automatic control
Pending Publication Date: 2016-11-23
格斯瑞科技有限公司
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Problems solved by technology
[0024] Therefore, all known technologies can only partially solve the problem of DNT loss and
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Embodiment 1
[0093] Example 1. Distilled water was premixed with 2,4-DNT to obtain 50 liters of sample water with a COD of 450 mg / l. Next add toluene at a rate of 10 mg per liter of water. A solution of DNT water and toluene was treated in a device in a loop comprising a rotary-pulse cavitator 1 , a centrifugal pump 2 , a membrane filter 4 , a hydrodynamic cavitator 5 , a UV lamp 6 and an ozone generator 7 . The processing time was 30 minutes. The measured COD of the effluent at the outlet of the device was 50 mg / l.
Embodiment 2
[0094] Example 2. Distilled water was premixed with 2,4-DNT to obtain 50 liters of sample water with a COD of 450 mg / l. Plant in a circuit comprising rotary-pulse cavitator 1, centrifugal pump 2, membrane filter 4, hydrodynamic cavitator 5, UV lamp 6 and ozone generator 7, carbon particle filter 8 and cyclone separator 10 Treat DNT water. The processing time was 30 minutes. The measured COD of the effluent at the output of the device was 10 mg / l.
Embodiment 3
[0095] Example 3. Distilled water was premixed with 2,4-TDA to obtain 50 liters of sample water with a COD of 450 mg / l. Plant in a circuit comprising rotary-pulse cavitator 1, centrifugal pump 2, membrane filter 4, hydrodynamic cavitator 5, UV lamp 6 and ozone generator 7, carbon particle filter 8 and cyclone separator 10 Treat TDA water. The processing time was 30 minutes. The measured COD of the effluent at the output of the device was 10 mg / l.
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Abstract
The invention relates to a device and a method for treating organic industrial wastewater based on a cavitation technique, and particularly relates to a device for treating industrial wastewater containing nitrobenzoates and aminobenzenes generated in the production process of toluene diisocynate (TDI). The device comprises a buffer tank, a rotary pulse cavitation device, a membrane filter, a hydraulic cavitation device, an ultraviolet lamp, an ozone generator, a carbon granule filter and a cyclone separator, wherein the rotary pulse cavitation device is used for removing nitrogen containing aromatic compounds from the wastewater through liquid-liquid extraction by using methylbenzene, the membrane filter is used for separating the methylbenzene from the treated wastewater, the ultraviolet lamp and the ozone generator are used for comprehensively purifying the wastewater so as to remove organic impurities, the carbon granule filter is used for removing residual ozone and organic impurities from the wastewater, and the cyclone separator is used for removing suspended particles from the wastewater.
Description
technical field [0001] The invention relates to a device for treating organic industrial wastewater containing aminobenzenes, nitrobenzenes, phenols, aldehydes and nitrogen-containing organic dyes. More specifically, the present invention relates to a plant for the treatment of waste water generated during the production of TDI: (i) 2,4-dinitrotoluene (2,4-DNT) by means of the nitration of toluene and dinitrotoluene Other isomers of (2,5-, 2,6, 3,4-, 2,3- and 3,5-DNT) and (ii) amino derivatives obtained by hydrogenation of the corresponding nitro isomers 2 , 4-diaminotoluene (2,4-TDA) and 2,6-diaminotoluene (2,6-TDA). Compared with the existing industrial wastewater treatment technology, especially for organic industrial wastewater containing difficult-to-treat aminobenzene and nitrobenzene pollutants, this equipment can be easily operated, easy to automate control, reduce sludge volume, and save energy. Under the premise of reducing consumption, the digestion rate of organi...
Claims
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