System and method for pretreatment of wastewater in ethylene glycol production

A production wastewater and pretreatment technology, applied in the field of resources and environment, can solve problems such as high cost, difficult operation, management and maintenance, and difficult pretreatment, so as to reduce environmental protection costs, improve project operation and management level, and ensure smooth production and operation Effect

Pending Publication Date: 2018-12-21
李明
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] The present invention aims to solve the problems of difficult pretreatment, high cost, and difficult operation, management and maintenance of high-concentration wastewater containing methylal and 2-methoxyethanol in the coal-based formaldehyde hydrocarboxylation ethylene glycol production process.

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  • System and method for pretreatment of wastewater in ethylene glycol production

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Embodiment Construction

[0017] like figure 1 As shown, a kind of ethylene glycol production wastewater pretreatment system of the present invention comprises 2-methoxyethanol wastewater regulating tank 12, 2-methoxyethanol wastewater circulation pump 14, extractant circulation pump 16, Hydrocarbon extractant storage tank 17, at least one-stage extraction device 15, extraction phase separation device 13, raffinate phase treatment device 20, methylal-containing wastewater regulating tank 1, at least one-stage vacuum distillation system, fuel proportional mixer 11 , automatic control cabinet 18, remote thermometer 4, remote vacuum gauge 6, online monitoring and early warning device for biotoxicity of wastewater containing methylal 9, online monitoring and early warning device for biotoxicity of wastewater containing 2-methoxyethanol 10, signal conversion device 19 And remote monitoring terminal 21, wherein each stage of vacuum distillation system includes methylal-containing wastewater circulation pump ...

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Abstract

The invention relates to a system and a method for pretreatment of wastewater in ethylene glycol production. The system comprises a methylal-containing wastewater pretreatment unit, an extracting phase separating device, a raffinate treatment device, a 2-methoxyethanol-containing wastewater pretreatment unit, a fuel ratio mixer, an automatic control device, and an Internet of Things remote monitoring and diagnosis management unit, wherein the methylal-containing wastewater pretreatment unit is a one-stage or multi-stage pressure-relief distillation system; the 2-methoxyethanol-containing wastewater pretreatment unit is mainly a one-stage or multi-stage extracting system. The system has the advantages that the methylal, 2-methoxyethanol and other substances in the wastewater in ethylene glycol production are removed at high efficiency by pressure-relief distillation and multi-stage extracting technologies, and recycled as the resources, so as to create conditions for the subsequent treatment; the running cost of sewage treatment is reduced; the Internet of Things remote monitoring and diagnosis technique is suitable for improving the operating and maintenance management level of theproject, so as to ensure the smooth production and running.

Description

technical field [0001] The invention relates to a pretreatment system and method for ethylene glycol production wastewater, in particular to a system and method for resourceful pretreatment of ethylene glycol production wastewater through remote monitoring, diagnosis and management of the Internet of Things, belonging to the field of resources and environment. Background technique [0002] All current coal chemical projects require zero discharge of wastewater. Ethylene glycol is an important basic chemical raw material. In the formaldehyde hydrocarboxylation method ethylene glycol production process using coal as raw material, a certain amount of high-concentration wastewater containing methylal and 2-methoxyethanol will be produced. It is difficult to carry out conventional biochemical treatment directly, which is a difficulty for zero discharge of wastewater; at the same time, the environmental protection cost of coal chemical projects is high, and the high concentration ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F101/34C02F103/36
CPCC02F1/04C02F2101/34C02F2103/36C02F2201/007
Inventor 李明
Owner 李明
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