New method for comprehensively treating benzyl alcohol production waste water and device of new method

A technology for the production of waste water and comprehensive treatment, which is applied in multi-stage water treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems that benzyl alcohol cannot be realized and the investment is large, and achieve small investment, high recovery rate, and reduced The effect of production costs

Active Publication Date: 2016-12-14
HUBEI GREENHOME MATERIALS TECH INC
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Problems solved by technology

[0005] If this method is used to treat the wastewater produced with an annual output of more than 40,000 tons of benzyl alcohol, it is necessary to purchase a large amount of adsorption resin, methanol and adsorption equipment, and invest a lot
In addition, a large amount of clean water is required to dilute the salty wastewater before it can be discharged, which cannot be achieved in large-scale benzyl alcohol production

Method used

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  • New method for comprehensively treating benzyl alcohol production waste water and device of new method

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Embodiment Construction

[0022] A recycling production device for comprehensive utilization of benzyl alcohol production wastewater, including a transfer tank 1, a crude product settling tank 3, and an extraction mixing tank A1, the bottom and middle of the transfer tank 1 are connected to the inlet of the condenser 2, and the outlet of the condenser 2 is connected to the crude product settling tank The top of 3 is connected, the lower water phase outlet of the crude product settling tank 3 is connected to the top wastewater inlet of the extraction mixing kettle A1 through the high overflow port on its right, the upper outlet of the crude product settling tank 3 is connected to the crude product oil tank 10, and the crude product oil tank 10 The transfer pump P8 is connected with the rectification tower A5, and the crude product oil phase is rectified to obtain benzyl alcohol with a purity >99%, which is discharged from outlet B and returned to production for use.

[0023] The dibenzyl ether inlet at t...

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Abstract

A new method for comprehensively treating benzyl alcohol production waste water comprises the following steps: firstly sending the benzyl alcohol-containing benzyl alcohol production waste water, collected in a benzyl alcohol production process, into a transfer tank, wherein the material temperature of the transfer tank is controlled to be 70 to 80 DEG C; then enabling materials in the transfer tank to enter a spiral plate condenser through a material transfer bump and then enter a crude product settling tank, wherein the material temperature of the crude product settling tank is controlled to be 40 to 50 DEG C, the materials are layered in the crude product settling tank, a crude product oil phase is on an upper layer, a water phase is on a lower layer, and the waste water of the water phase on the lower layer of the crude product settling tank continuously overflows to an extraction mixed kettle. Less input and simple equipment operation are achieved; all intermediate materials can be recycled; the benzyl alcohol recovery rate is high; zero emission of the treated benzyl alcohol production waste water is achieved; large-scale and stable benzyl alcohol production is completely realized.

Description

technical field [0001] The invention relates to a treatment method for chemical production wastewater with complex components, high concentration, high salt content, high toxicity, and difficult biodegradation, especially capable of recovering organic matter in wastewater, greatly reducing production costs and equipment investment, meeting environmental protection standards, and realizing industrial production Wastewater zero discharge. Background technique [0002] The current production method of benzyl alcohol is obtained by heating and hydrolyzing benzyl chloride under alkali catalysis. During the production process, a large amount of waste water will be discharged, with high concentration and high toxicity, and the content of benzyl alcohol lost in it is very high (usually greater than 12000mg.L~1), benzyl alcohol production wastewater also contains a large amount of inorganic salts (mainly NaCl and Na2CO3), with extremely poor biodegradability, and is recognized by dom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/34
CPCC02F9/00C02F2301/08C02F2001/007C02F2101/34C02F1/56C02F1/5236C02F1/04C02F1/26C02F1/285
Inventor 汤烜肖华青杨华
Owner HUBEI GREENHOME MATERIALS TECH INC
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