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A methanol-to-olefin wastewater treatment device and its start-up method

A technology for methanol to olefins and wastewater treatment, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. The effect of good water quality, less sludge inoculation and short start-up time

Active Publication Date: 2018-04-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Like the Chinese patent CN102442744B, limited by the deficiencies of the existing technology, it is difficult for this patent to combine low-concentration MTO wastewater into consideration
[0019] It is not difficult to see from the above description that the prior art treats high-concentration MTO wastewater and low-concentration MTO wastewater separately. This is because it is technically feasible or economically rational to combine MTO wastewater with existing technology. Existence constraints

Method used

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  • A methanol-to-olefin wastewater treatment device and its start-up method
  • A methanol-to-olefin wastewater treatment device and its start-up method
  • A methanol-to-olefin wastewater treatment device and its start-up method

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Effect test

Embodiment 1

[0153] The COD of MTO wastewater is 1000-1200mg / L, and the suspended matter content is 50-200mg / L. The content of suspended solids in the effluent of the coagulation sedimentation tank is 30-100mg / L. The COD of the effluent from the homogeneous tank is 1050-1150mg / L, and the suspended solids content is 50-80mg / L. The content of suspended solids in the effluent of the air flotation tank is less than 50mg / L.

[0154] The anaerobic reactor is sequentially provided with a gas-water distribution area, a packing area and a water outlet area from bottom to top. The air-water distribution area is equipped with a supporting layer, a water distributor and an air distributor. Among them, the perforated tubular water distributor is located in the lower part of the supporting layer, and the perforated tubular air distributor is located in the upper part of the supporting layer. The supporting layer is composed of graded ceramic balls: the particle size of the bottom ceramic ball is 25mm ...

Embodiment 2

[0159] The COD of MTO wastewater is 500-2000mg / L, and the suspended matter content is 50-300mg / L. The content of suspended solids in the effluent of the coagulation sedimentation tank is 30-150mg / L. The COD of the effluent from the homogeneous tank is 800-1500mg / L, and the content of suspended solids is 50-100mg / L. The content of suspended solids in the effluent of the air flotation tank is lower than 80mg / L.

[0160] The anaerobic reactor is sequentially provided with a gas-water distribution area, a packing area and a water outlet area from bottom to top. The air-water distribution area is equipped with a supporting layer, a water distributor and an air distributor. Among them, the perforated tubular water distributor is located in the lower part of the supporting layer, and the perforated tubular air distributor is located in the upper part of the supporting layer. The supporting layer is composed of graded ceramic balls: the particle size of the bottom ceramic ball is 13...

Embodiment 3

[0165] The COD of MTO wastewater is 300-1500mg / L, and the suspended matter content is 50-200mg / L. The content of suspended solids in the effluent of the coagulation sedimentation tank is 30-100mg / L. The COD of the effluent from the homogeneous tank is 500-1200mg / L, and the content of suspended solids is 50-80mg / L. The content of suspended solids in the effluent of the air flotation tank is less than 50mg / L.

[0166] The anaerobic reactor is sequentially provided with a gas-water distribution area, a packing area and a water outlet area from bottom to top. The air-water distribution area is equipped with a supporting layer, a water distributor and an air distributor. Among them, the perforated tubular water distributor is located in the lower part of the supporting layer, and the perforated tubular air distributor is located in the upper part of the supporting layer. The supporting layer is composed of graded ceramic balls: the particle size of the bottom ceramic ball is 25mm...

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Abstract

The invention relates to a methanol-to-olefin wastewater treatment device and a starting method thereof, comprising: a grease trap, a coagulation sedimentation tank, a homogeneous tank, a homogeneous tank outlet pump, an air flotation tank, an anaerobic circulation tank, an anaerobic circulation pump, Anaerobic reactor, anaerobic water outlet tank, anaerobic water outlet pump, oxygenator, aerobic circulation pump and aerobic reactor; the starting method of the device includes the following steps: the first step, sequentially start the grease trap, coagulation Sedimentation tank, homogeneous tank, homogeneous tank outlet pump, air flotation tank, anaerobic circulation tank, anaerobic outlet tank, anaerobic outlet pump; the second step is to start the anaerobic circulation pump, anaerobic reactor, and oxygenator in sequence ; The third step is to sequentially start the oxygenator, the aerobic circulation pump and the aerobic reactor. The methanol-to-olefin wastewater treatment device and its start-up method of the present invention realize the comprehensive and effective treatment of MTO wastewater, have the advantages of less inoculated sludge, short start-up time, high treatment efficiency, and good effluent quality, and are easy to realize industrial application .

Description

technical field [0001] The invention relates to the technical field of MTO (methanol to olefin), in particular to a methanol to olefin wastewater treatment device and a starting method thereof. Background technique [0002] Low-carbon olefins such as ethylene and propylene are important organic chemical raw materials and play a very important role in modern petroleum and chemical industries. Traditionally, the source of ethylene and propylene is mainly hydrocarbon steam cracking, and the feedstock is mainly naphtha. In recent years, the oxygenate-to-olefins (OTO) process has become increasingly mature, especially the MTO process has begun to be applied on a large scale. [0003] The chemical reaction equation and thermal effect of producing ethylene and propylene from methanol are: [0004] 2CH 3 OH→C 2 h 4 +2H 2 O (△H=11.72KJ / mol, 427℃) [0005] 3CH 3 OH→C 3 h 6 +3H 2 O (△H=30.98KJ / mol, 427°C) [0006] It can be seen from the above reaction equation that the met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 程学文栾金义莫馗李海龙侯秀华王珺高凤霞张宾
Owner CHINA PETROLEUM & CHEM CORP
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