Treatment method of polyether polyol production wastewater and equipment for implementing treatment method

A technology of polyether polyol and treatment method, which is applied in water/sewage treatment, natural water treatment, water treatment parameter control, etc., can solve the problems of high equipment investment and treatment cost, high requirement of wastewater composition, complicated technological process, etc. Achieve the effect of low processing cost, stable reaction, simple and easy process flow

Pending Publication Date: 2021-06-22
BEFAR GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In view of the technical problems existing in the prior art, such as: it is difficult to effectively control the progress of the reaction, the composition of the wastewater is relatively high, the technological process is too complicated, the equipment investment and treatment costs are too high, and transition metals such as rhodium and palladium are used as catalysts, Operating costs are too high, etc., the present invention firstly provides a treatment method for polyether polyol production wastewater

Method used

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  • Treatment method of polyether polyol production wastewater and equipment for implementing treatment method
  • Treatment method of polyether polyol production wastewater and equipment for implementing treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0081] Take the high-concentration organic wastewater discharged from the polyether polyol device, filter and separate the suspended solids in it, and obtain the organic liquid wastewater solution. After the GC-MS analyzer, it can be seen that the components in it are: acrylonitrile, styrene, isopropanol The COD value of the liquid waste water is 25600 mg / L and the BOD5 / COD value is 0.12 by using the COD rapid tester to analyze the COD value of 0.12; among them, the detection method of BOD5 is: in the microbiology laboratory, the water sample is diluted 10 times and then filled with After the culture bottle is plugged, it should be airtight, and the bottle is placed in an incubator at a constant temperature of 20°C for 5 days. The dissolved oxygen concentration was measured before and after cultivation, and the difference between the two can be used to calculate the mass of oxygen consumed per liter of water, that is, the BOD5 value.

[0082] Put the liquid waste water into th...

Embodiment 2

[0085] Take the high-concentration organic wastewater discharged from the polyether polyol device, and centrifuge to separate the suspended solids in it. The organic liquid wastewater solution obtained through the GC analyzer shows that the components in it include: acrylonitrile, styrene, isopropanol, etc. Composition, the COD value of liquid waste water is 30,000mg / L and the BOD5 / COD value is 0.09 after analysis with a COD rapid analyzer; among them, the detection method of BOD5 is: in the microbiology laboratory, dilute the water sample by 10 times and then fill it with culture After the bottle is plugged, it should be airtight, and the bottle is placed in an incubator at a constant temperature of 20°C for 5 days. The dissolved oxygen concentration was measured before and after cultivation, and the difference between the two can be used to calculate the mass of oxygen consumed per liter of water, that is, the BOD5 value.

[0086] Put the liquid waste water into the liquid s...

Embodiment 3

[0089] Take out a part of the mixed high-concentration wastewater discharged from the polyether polyol production unit, and obtain a liquid wastewater solution after filtration and separation. After analysis, it can be seen that the components include acrylonitrile, styrene, azobisisobutyronitrile and other components. Quickly use COD The COD value of the waste water was analyzed by the analyzer to be 28000mg / L, and the BOD5 / COD value was 0.1. Among them, the detection method of BOD5 is: in the microbiological laboratory, dilute the water sample by 10 times and then fill the culture bottle. Ventilate, and place the bottle in an incubator at a constant temperature of 20° C. for 5 days. The dissolved oxygen concentration was measured before and after cultivation, and the difference between the two can be used to calculate the mass of oxygen consumed per liter of water, that is, the BOD5 value.

[0090] Put the liquid waste water into the liquid storage tank and add a certain amo...

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Abstract

The invention relates to a treatment method of polyether polyol production wastewater and equipment for implementing the treatment method. The treatment method of the polyether polyol production wastewater comprises the following steps: removing solid substances in the polyether polyol production wastewater to obtain liquid wastewater; pretreating the liquid wastewater to obtain a pretreatment solution; in the presence of a catalyst, mixing the pretreatment liquid with an oxidizing agent, and carrying out oxidation reaction to obtain a reaction product; and cooling and depressurizing the reaction product, and then carrying out gas-liquid separation. The treatment method of the polyether polyol production wastewater is high in wastewater treatment efficiency, reaction can be effectively controlled, the technological process is simple and easy to implement, the catalyst with too high cost does not need to be used, reaction conditions are mild, the flow is more reasonable, and the reaction is more stable.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment in environmental protection, and relates to a treatment method for polyether polyol production wastewater and equipment for implementing the treatment method, and in particular to a wet oxidation method for treating toxic organic substances such as acrylonitrile and styrene A method for producing waste water from high-concentration polyether polyols. Background technique [0002] The wastewater discharged from polyether polyol production units mainly contains ethylene oxide, propylene oxide, styrene, acrylonitrile, azobisisobutyronitrile, etc., which have high COD content, low biodegradability, and poor degradability, etc. It is a type of wastewater that is difficult to treat in organic chemical industry. In the prior art, conventional treatment methods mainly include: anaerobic-aerobic biological treatment, biological activated carbon treatment, etc., but the conventional treatment...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/66C02F1/72C02F101/30C02F101/32C02F101/34C02F101/38C02F103/38
CPCC02F9/00C02F1/001C02F1/66C02F1/725C02F1/008C02F2101/30C02F2101/32C02F2101/34C02F2101/38C02F2209/08C02F2103/38
Inventor 马浩房超张林林杨振军蒋巨兵王志元成洪渠商付滨林新伟
Owner BEFAR GROUP CO LTD
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