PMIDA wastewater treatment method

A treatment method and wastewater technology, applied in natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as high content of refractory compounds, high concentration of pollutants, and difficult treatment , to achieve the effect of high salt content, high concentration and difficult treatment

Inactive Publication Date: 2010-06-23
安徽锦邦化工股份有限公司
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Problems solved by technology

Diglyphosate wastewater has the characteristics of large discharge, high pollutant concentration, high toxicity, high salt content, high content of refractory compounds, and difficult treatment. Currently, the environmental protection technologies commonly used in China are difficult to treat this wastewater. Wastewater treatment is one of the problems plaguing glyphosate production enterprises with iminodiacetic acid process

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  • PMIDA wastewater treatment method
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Embodiment Construction

[0009] Treatment method of glyphosate wastewater:

[0010] (1) Put the glyphosate wastewater produced by the reaction in the condensation section and the kettle 1 in the glyphosate production process into the centrifuge 2 to be washed, spin-dried, and filtered before entering the mother liquor sedimentation tank, where a catalyst is added for pretreatment After treatment, the supernatant in the mother liquor sedimentation tank 3 is transferred to the sedimentation tank 12 via the mother liquor pump 4;

[0011] (2) Put the hopper 5 filled with calcium carbide into the first hopper 6, after being replaced by nitrogen, put it into the second hopper 7 through the valve, and then transport the calcium carbide to the generator 8 by the electromagnetic oscillator, and then open it The inlet valve of the generator 8 pumps the supernatant in the sedimentation tank 12 into the generator. The calcium carbide undergoes a hydrolysis reaction in the water, and the acetylene gas produced by the r...

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Abstract

The invention discloses a PMIDA wastewater treatment method, wherein PMIDA wastewater washing, drying, press filtration, catalyst pretreatment, wet acetylene reaction and treatment of carbide slurry produced after the reaction are comprised. The method treats and sends the PMIDA wastewater produced in the condensation section reaction in a glyphosate production process to an acetylene section of a resin production line, takes the wastewater as wet acetylene production water, and simultaneously, adjusts an acetylene generation process, thereby realizing the recycling of water resource and the zero emission of the PMIDA wastewater, reducing the environment protection pressure, and meeting the national policies of energy saving and emission reduction.

Description

Technical field [0001] The invention relates to a method for processing industrial wastewater, in particular to a method for processing diglycphosate wastewater. Background technique [0002] Glyphosate is a high-efficiency, low-toxicity, low-residue, and broad herbicidal herbicide. It has now become the pesticide with the largest output, the largest sales and the fastest growth. There are many synthetic routes for glyphosate, among which the diethanolamine-iminodiacetic acid IDA method currently occupies a dominant position due to its low raw material and energy consumption and high conversion rate. IDA method synthesizes glyphosate by using diethanolamine, formaldehyde, and phosphorus trichloride as starting materials to first prepare N-(aloylmethyl)iminodiacetic acid (abbreviated as Shuangglyco), and then oxidize to prepare glyphosate. The centrifugal process in the glyphosate condensation section will discharge high-concentration pH=0.6-1.0 strong acid diglycphosate wastewat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C10H21/00C02F103/36
Inventor 方立贵董亮茆庆文王国平郝祥忠王国用张兵张明徐晓莉
Owner 安徽锦邦化工股份有限公司
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