Technique for processing wastewater containing methanol and dimethyl ether

A technology for sewage treatment and dimethyl ether, which is applied in water/sewage treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc. The effect of stability, less equipment investment and simple process

Active Publication Date: 2008-03-12
LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology cannot treat sewage containing substances such as methanol and dimeth

Method used

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  • Technique for processing wastewater containing methanol and dimethyl ether

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Embodiment Construction

[0017] As shown in the figure, the sewage containing methanol and dimethyl ether is pressurized by the sewage pump 1, and enters the stripper 3 after the sewage-purified water heat exchanger 2 exchanges heat with the purified water at the bottom of the stripper 3. The bottom of the stripper 3 is heated and stripped with steam through a reboiler 7 . The vapor mixture such as methanol produced at the top of the stripper 3 is cooled by the cooler 4 and then enters the reflux tank 5, and the pressure is increased through the reflux pump 6. A part of it is returned to the top of the stripper 3 as reflux, and the other part can be used as methanol to produce low The raw materials of carbon olefins are returned to the reaction part of the MTO unit, and can also be sent out of the unit for other purposes. What comes out of the bottom of stripping tower 3 is purified water with a total weight content of methanol and dimethyl ether not greater than 100ppm, which is sent out of the devic...

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Abstract

The present invention discloses a wastewater treatment technics containing methanol and dimethyl ether and solves the problem that the wastewater produced by MTO device can not meet the need of the water inlet quality of wastewater treatment plant. The technics of the present invention includes that the wastewater containing methanol and dimethyl ether exchanges heat with the purified water in the bottom of a stripping tower after pressuring and enters the stripping tower. The gas mixture of methanol, etc., generated at the top of the stripping enters into a reflux drum after heat exchange. Part of the methanol gas return to the top of the stripping tower as reflux and the other part is sent to the outside of the device or as the material of MTO device. The bottom of the methanol stripping tower generates purified water and is sent to the outside of the device after exchanging heat with the wastewater containing methanol and dimethyl ether. The total content of methanol and dimethyl ether in the purified water acquired after treated by the technics of the present invention is less than or equal to 100ppm and the purified water can meet the need of the water inlet quality of wastewater treatment plant.

Description

technical field [0001] The invention belongs to the field of sewage treatment. It particularly relates to a sewage treatment process containing methanol and dimethyl ether. Background technique [0002] Petroleum refining, petrochemical and other industrial processes often produce sewage. If it is not treated in time, it will seriously pollute the environment and cause the loss of effectively used resources. The technology of producing olefins (MTO) from coal or natural gas through methanol is at the forefront of technology development in the world, and has obvious competitive potential. Under the current situation of high oil prices, the production of low-carbon olefins from coal or natural gas through methanol is about to enter the stage of industrial application in the world. Since the sewage produced by methanol to low-carbon olefins unit (hereinafter referred to as MTO unit) contains a small amount of methanol toxic substances and dimethyl ether and other harmful subs...

Claims

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Application Information

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IPC IPC(8): C02F1/04C02F1/58C02F101/34
Inventor 熊献金刘昱施磊乔立功梁龙虎
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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