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Coking wastewater advanced treatment system and process

A coking wastewater and advanced treatment technology, applied in the direction of oxidation water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as insufficient matching, reverse osmosis membrane pollution, and insufficient removal efficiency , to achieve the effect of not easy to block and long service life

Inactive Publication Date: 2012-07-04
中电恒德环保投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the gap between the pretreatment process with low removal efficiency and the reverse osmosis desalination system with very strict requirements on influent water in the advanced treatment process of coking wastewater combined with catalytic oxidation method and reverse osmosis technology matching, the problem that the reverse osmosis membrane will be polluted or blocked during long-term operation

Method used

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  • Coking wastewater advanced treatment system and process
  • Coking wastewater advanced treatment system and process
  • Coking wastewater advanced treatment system and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The coking wastewater advanced treatment system described in this embodiment is as follows: figure 1 shown, including:

[0050] A microwave-assisted catalytic oxidation device, the microwave-assisted catalytic oxidation device performs catalytic oxidation treatment on coking wastewater after A / O biochemical treatment;

[0051] A mixing reaction tank connected to the microwave-assisted catalytic oxidation device, and a sedimentation tank connected to the mixing reaction tank;

[0052] A manganese sand filter connected with the sedimentation tank, and a precision filter connected with the manganese sand filter;

[0053] The coking wastewater advanced treatment system also includes a frequent electrode reversal electrodialysis device connected to the precision filter.

[0054] The treatment process based on the coking wastewater advanced treatment system described in this embodiment is:

[0055] (1) Coking wastewater after A / O biochemical treatment, with a volume of 120...

Embodiment 2

[0066] The coking wastewater advanced treatment system described in this embodiment is the same as that in Embodiment 1.

[0067] The treatment process based on the coking wastewater advanced treatment system described in this embodiment is:

[0068] (1) Coking wastewater after A / O biochemical treatment, with a volume of 4800m 3 The water intake of / d enters the microwave-assisted catalytic oxidation device, and acid is added to the coking wastewater in the microwave-assisted catalytic oxidation device to adjust the pH value of the coking wastewater to 5.0, and then ferrous iron is added to the coking wastewater Salt and hydrogen peroxide are mixed evenly, and coking wastewater is catalytically oxidized under the action of microwave field;

[0069] The added concentration of ferrous salt described in this embodiment is Fe 2+ Calculated as 91.5 mg / L, which is 0.3 times of the COD concentration; 2 o 2 Calculated as 646.6 mg / L, which is 2.12 times of the COD concentration of...

Embodiment 3

[0078] The coking wastewater advanced treatment system described in this embodiment is as follows: figure 2 shown, including:

[0079] A mixing regulating tank, a dosing stirring tank connected to the mixing regulating tank, and a microwave-assisted catalytic oxidation device connected to the dosing and stirring tank, the microwave-assisted catalytic oxidation device is used for A / O biochemically treated Catalytic oxidation treatment of coking wastewater;

[0080] A mixing reaction tank connected to the microwave-assisted catalytic oxidation device, and a sedimentation tank connected to the mixing reaction tank, and an intermediate water tank connected to the sedimentation tank, and the intermediate water tank is provided with an aerator;

[0081] A manganese sand filter connected to the intermediate pool, and a precision filter connected to the manganese sand filter;

[0082] The coking wastewater advanced treatment system also includes a frequent pole-reversing electrodia...

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Abstract

The invention relates to a coking wastewater advanced treatment system, comprising a microwave-assisted catalytic oxidation device, a mixing reaction pool, a sedimentation pool, a manganese sand filter, a precision filter and a frequent electrode reverse electrodialysis device, wherein the microwave-assisted catalytic oxidation device is used for carrying out catalytic oxidation treatment on coking wastewater subjected to A / O (Anoxic / Oxic) biochemical treatment; the mixing reaction pool is connected with the microwave-assisted catalytic oxidation device and the sedimentation pool; the manganese sand filter is connected with the sedimentation pool and the precision filter; and the frequent electrode reverse electrodialysis device is connected with the precision filter. The advanced treatment process provided by the invention can be used for coking wastewater advanced treatment and simultaneously has a high-efficiency pretreatment and economic and proper type desalting system.

Description

technical field [0001] The invention relates to the field of coking wastewater treatment, in particular to a coking wastewater advanced treatment system and a treatment process. Background technique [0002] Coking wastewater is wastewater containing a large amount of aromatic compounds and heterocyclic compounds produced in the process of coal coke, gas purification and coking product recovery. It has the characteristics of large discharge, high concentration of organic matter and ammonia nitrogen, poor biodegradability, and complex organic components. , belongs to the organic wastewater that is difficult to biodegrade. In order to curb the trend of low-level redundant construction and blind expansion of the coking industry, promote the upgrading of industrial structure, promote energy conservation, emission reduction and technological progress, the Ministry of Industry and Information Technology revised the original "Access Conditions for Coking Industry" in 2008, clearly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F1/469C02F1/72
Inventor 尹胜奎施文杨泽民魏厚瑗李国庆
Owner 中电恒德环保投资有限公司
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