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Efficient and stable coking wastewater advanced treatment process and treatment system

A technology for coking wastewater and advanced treatment, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. Salt system and process issues

Inactive Publication Date: 2012-09-12
BEIJING JINDAYU ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problem of advanced treatment of coking wastewater combined with microwave catalytic oxidation and electrodialysis technology used in the prior art, although the salt content in fresh water can meet the requirements of the national standard after treatment by this process, it still cannot meet certain requirements. The production needs of some industrial enterprises, but there is no system and process problem in the existing technology that can further reduce the salt content of the effluent and can run stably

Method used

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  • Efficient and stable coking wastewater advanced treatment process and treatment system
  • Efficient and stable coking wastewater advanced treatment process and treatment system
  • Efficient and stable coking wastewater advanced treatment process and treatment system

Examples

Experimental program
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Effect test

Embodiment 1

[0060] The coking wastewater advanced treatment system described in this embodiment is as follows: figure 1 shown, including:

[0061] micro electrolytic cell;

[0062] A microwave-assisted catalytic oxidation device connected with the micro-electrolytic cell;

[0063] A mixing reaction tank connected to the microwave-assisted catalytic oxidation device, and a sedimentation tank connected to the mixing reaction tank;

[0064] The filter that is connected with described settling tank, the filter that uses in the present embodiment is manganese sand filter;

[0065]A frequent electrode reversal electrodialysis device connected with the manganese sand filter;

[0066] The coking wastewater advanced treatment system also includes a reverse osmosis device connected to the fresh water outlet of the frequent electrode reversal electrodialysis device.

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

[0068] (1) Co...

Embodiment 2

[0075] The coking wastewater advanced treatment system described in this embodiment is the same as that in Embodiment 1.

[0076] The treatment process of the coking wastewater advanced treatment system described in this embodiment is:

[0077] (1) Coking wastewater after A / O biochemical treatment, with a volume of 1200m 3 The water inflow of / d enters the micro-electrolytic cell, adds acid to the coking wastewater in the micro-electrolytic cell to adjust the pH value of the coking wastewater to 4.0, and aerates the coking wastewater, and the air-to-water ratio is 8: 1, the contact time of the coking wastewater and the iron-carbon filler in the micro-electrolytic cell is 1h;

[0078] (2) The effluent after the electrolytic treatment of the micro-electrolytic cell enters the microwave-assisted catalytic oxidation device, and the ferrous salt and hydrogen peroxide are added to the coking wastewater in the microwave-assisted catalytic oxidation device and stirred evenly. Cataly...

Embodiment 3

[0084] The coking wastewater advanced treatment system described in this embodiment is as follows: figure 2 shown, including:

[0085] A mixing regulating pool, a micro electrolytic cell is connected to the mixing regulating pool, a first intermediate water pool is connected to the micro electrolytic cell, and a dosing stirring pool is connected to the first intermediate water pool, and the mixing regulating pool is connected to the mixing regulating pool. The above-mentioned dosing stirring tank is connected with a microwave-assisted catalytic oxidation device;

[0086] A mixing reaction tank connected to the microwave-assisted catalytic oxidation device, and a sedimentation tank connected to the mixing reaction tank, a second intermediate water tank connected to the sedimentation tank, the second intermediate water tank is provided with aeration device;

[0087] A multimedia filter connected to the second intermediate pool, and a first precision filter connected to the mu...

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Abstract

Disclosed are an efficient and stable coking wastewater advanced treatment process and a treatment system. The coking wastewater advanced treatment system comprises a microelectrolysis cell, a microwave auxiliary catalytic oxidation device, a mixed reaction pond, a settling pond, a filter, a frequent reverse electrode electro-osmosis device and a reverse osmosis device, the microwave auxiliary catalytic oxidation device is connected with the microelectrolysis cell, the mixed reaction pond is connected with the microwave auxiliary catalytic oxidation device, the settling pond is connected with the mixed reaction pond, the filter is connected with the settling pond, the frequent reverse electrode electro-osmosis device is connected with the filter, and the reverse osmosis device is connected with a fresh water outlet of the frequent reverse electrode elctro-osmosis device. The COD (chemical oxygen demand) content and the saltness of outflow water after treatment of the microelectrolysis cell and follow-up microwave catalytic oxidation, coagulation sedimentation, filtration and electro-osmosis treatment are low, so that the previous devices can be matched with the electro-osmosis device and the reverse osmosis desalting device, and the system can run stably while efficient desalting is realized. In addition, a concentrate circulation mode of the desalting system is optimized, and the quality of the outflow water is greatly improved under the condition that water use efficiency is not decreased.

Description

technical field [0001] The invention relates to the field of coking wastewater treatment, in particular to an efficient and stable coking wastewater advanced treatment process and treatment system. 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 Industr...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F1/469C02F1/52
CPCY02A20/124Y02A20/131
Inventor 尹胜奎曹文彬余小伟
Owner BEIJING JINDAYU ENVIRONMENT TECH CO LTD
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