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Method of treating organic waste water containing salt

A technology of organic wastewater treatment and treatment method, applied in water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of secondary pollution, high treatment cost, complicated operation, etc. The effect of low cost, high heat utilization rate and safe operation

Active Publication Date: 2005-09-28
中国中化股份有限公司 +2
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Problems solved by technology

[0003] In order to overcome the problems of high treatment cost, complex operation and secondary pollution in the prior art, the present invention proposes a new treatment method for salt-containing organic wastewater, which is suitable for the treatment of pesticides, dyes, medicines, etc. Salt-containing organic wastewater discharged from chemical production that is difficult to biochemically treat

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  • Method of treating organic waste water containing salt

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Embodiment Construction

[0014] Combine figure 1 The following examples are used to further describe the present invention, but the present invention is by no means limited to this.

[0015] Wastewater from the production process of pesticide and insecticide Badan, consisting of 1.5% sodium cyanide, 19% sodium sulfite and sodium chloride, 3.5% organic matter (mainly Badan), PH=8-9, treatment capacity 1.0 ton / hour .

[0016] The process wastewater enters the scrubbing absorption tower 6, and is cyclically washed and absorbed by the circulating pump 5 to absorb the tail gas discharged from the cyclone separator 4, while the wastewater is preheated to about 60°C. The circulating pump 5 atomizes part of the wastewater into the spray fluidized granulation bed 3 with a diameter of 1.2 meters for granulation and drying, and the granulation operation air flow is 3000m 3 / h, the salt layer temperature of the granulation bed is 115℃, and 130-140 kg of polluted salt particles are discharged every half an hour to mai...

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Abstract

The negative pressure process of treating salt-containing organic waste water includes three steps of washing and absorption, fluidizing and pelletizing, and roasting. The salt-containing organic waste water is first preheated in washing absorption tower and tail gas from solid-gas separator is washed, the preheated waste water is fluidized, pelletized and dried to produce coarse salt, and the coarse salt is roasted to eliminate its organic matter. The roasted fume is twice incinerated to purify, and the high temperature tail gas has its heat utilized in fluidizing, pelletizing and drying, and is further processed in solid-gas separator to trap its fine salt and washed, absorbed and purified before exhaust. The said process has high heat utilization rate, low cost, high treating effect and no secondary pollution.

Description

Technical field [0001] The invention relates to a method for treating salt-containing organic wastewater, which is suitable for treating salt-containing organic wastewater that is difficult to biochemically treat discharged in chemical production of pesticides, dyes, medicines and intermediates. Background technique [0002] The treatment of salt-containing organic wastewater is a problem that is commonly encountered in the chemical production of pesticides, dyes, and pharmaceuticals and must be solved thoroughly. A lot of research has been conducted on this at home and abroad. Japan (Tokkai Sho 49-46576) proposes to adopt a vertical quench incineration method to directly atomize and incinerate waste water after evaporating and concentrating. This method requires a 900-1300°C incineration temperature and a large excess of air to completely decompose the organic matter, resulting in high fuel consumption. , The processing cost is large. The former Soviet Union "Petroleum Processin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00
Inventor 龙飞张军周明昊王宏梅孙兰梅
Owner 中国中化股份有限公司
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