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Treatment system and treatment method for Fischer-Tropsch synthesis wastewater

A technology of Fischer-Tropsch synthesis wastewater and treatment system, which is applied in the field of Fischer-Tropsch synthesis wastewater treatment system, can solve the problems of difficult to reach the standard of treated water quality, low water recovery rate, excessive alkali addition and other problems, and achieves good organic matter removal rate, high Operational efficiency, the effect of raising the pH value

Active Publication Date: 2017-01-11
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a treatment system and treatment method for Fischer-Tropsch synthetic wastewater to solve the problem of excessive alkali addition in the current Fischer-Tropsch synthetic wastewater treatment in the prior art, resulting in low water recovery and poor water quality. Difficult to meet

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  • Treatment system and treatment method for Fischer-Tropsch synthesis wastewater

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Experimental program
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Effect test

Embodiment 1

[0051] Firstly, the Fischer-Tropsch synthetic wastewater is pretreated by sequentially using the degreasing filter and the ultrafiltration membrane module. The COD content of the treated Fischer-Tropsch synthetic wastewater is reduced from 50,000mg / L to 30,000mg / L. The contents of various substances in the wastewater are as follows: Methanol 1.4wt%, ethanol 2.2wt%, propanol 0.5wt%, butanol 0.2wt%, acetone 0.08wt%, acetic acid 0.5wt%; secondly, the Fischer-Tropsch synthesis wastewater after pretreatment is added to the separation of the electrodialysis device Chamber, add deionized water to the concentration chamber of the electrodialyzer, and add 0.3mol / L Na 2 SO4 The solution is fed into the pole chamber of the electrodialysis unit. When the electrodialysis DC power supply is 10V and the flow rate is 36L / h, the content of other substances in the wastewater is basically unchanged, the content of organic acids is reduced from 0.5wt% to 0.05wt%, and the removal rate is 90%; the ...

Embodiment 2

[0053] Firstly, the Fischer-Tropsch synthetic wastewater is pretreated by sequentially using oil removal filters and ultrafiltration membrane modules. The COD content of the treated Fischer-Tropsch synthetic wastewater is reduced from 60,000 mg / L to 38,000 mg / L. The contents of various substances in the wastewater are as follows: Methanol 1.3wt%, ethanol 2.3wt%, propanol 0.6wt%, butanol 0.1wt%, acetone 0.07wt%, acetic acid 0.6wt%; secondly, the Fischer-Tropsch synthesis wastewater after pretreatment is added to the separation of the electrodialysis device Chamber, add deionized water to the concentration chamber of the electrodialyzer, and add 0.3mol / L Na 2 SO 4 The solution is fed into the pole chamber of the electrodialysis unit. When the electrodialysis DC power supply is 10V and the flow rate is 36L / h, the content of other substances in the wastewater is basically unchanged, the content of organic acids is reduced from 0.6wt% to 0.05wt%, and the removal rate is 91%; the t...

Embodiment 3

[0055] Firstly, the Fischer-Tropsch synthetic wastewater is pretreated by sequentially using the degreasing filter and the ultrafiltration membrane module. The COD content of the treated Fischer-Tropsch synthetic wastewater is reduced from 56000mg / L to 32000mg / L. The contents of various substances in the wastewater are as follows: Methanol 1.5wt%, ethanol 2.1wt%, propanol 0.4wt%, butanol 0.3wt%, acetone 0.09wt%, acetic acid 0.4wt%; secondly, the Fischer-Tropsch synthesis wastewater after pretreatment is added to the separation of the electrodialysis device Chamber, add deionized water to the concentration chamber of the electrodialysis device, and add 0.3mol / L Na 2 SO 4 The solution is fed into the pole chamber of the electrodialysis unit. When the electrodialysis DC power supply is 10V and the flow rate is 36L / h, the content of other substances in the wastewater is basically unchanged, the content of organic acids is reduced from 0.4wt% to 0.035wt%, and the removal rate is 9...

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Abstract

The invention provides a treatment system and a treatment method for Fischer-Tropsch synthesis wastewater. The treatment system for the Fischer-Tropsch synthesis wastewater comprises an electrodialysis device, a rectification tower, an anaerobic reactor, a precipitation tank and an aerobic biochemical system which communicate with one another sequentially. The treatment system further comprises an iron-carbon microelectrolysis device, wherein an inlet of the iron-carbon microelectrolysis device communicates with an organic acid outlet of the electrodialysis device, and an outlet of the iron-carbon microelectrolysis device communicates with an inlet of the anaerobic reactor. The treatment system further comprises the iron-carbon microelectrolysis device, the inlet of the iron-carbon microelectrolysis device communicates with the organic acid outlet of the electrodialysis device, and the outlet of the iron-carbon microelectrolysis device communicates with the inlet of the anaerobic reactor, so that the electrodialysis device is used for carrying out deacidification on the wastewater before rectification, and the corrosive action on rectification equipment caused by a small amount of organic acids contained in the wastewater is avoided; meanwhile, alkalized neutralization is not required, so that a relatively high treatment load for subsequent water treatment caused by a large amount of brought scaling salt ions is avoided.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a treatment system and a treatment method for Fischer-Tropsch synthetic wastewater. Background technique [0002] Fischer-Tropsch (F-T) synthesis is under the action of a catalyst, from CO and H 2 Synthetic process to obtain qualified gasoline products. In the oil synthesis process, the water phase produced by the F-T synthesis section contains about 10% of oxygen-containing organic compounds, including alcohols, acids, aldehydes, ketones, etc. These organic compounds are basic organic chemicals with high added value At the same time, if this part of wastewater is discharged directly without treatment, it will cause serious pollution to the environment. Therefore, how to properly treat Fischer-Tropsch synthesis wastewater has become a key problem to be solved in the coal-to-oil process. [0003] The current method of treating Fischer-Tropsch synthesis wastewater i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/36
CPCC02F1/04C02F1/40C02F1/444C02F1/461C02F1/4693C02F3/02C02F3/28C02F9/00C02F2001/007C02F2103/36
Inventor 张蔚魏江波李红赵代胜李水弟赵鹏飞田华王晓霞葛德禹
Owner CHNA ENERGY INVESTMENT CORP LTD
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