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Coking wastewater pretreatment method and coking wastewater pretreatment system

A technology for coking wastewater and pretreatment, which is applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problem of high capital construction cost and operating cost of physical method, and large influence of biochemical method on water volume. , difficult to meet the standard stably, to achieve the effect of reducing energy consumption, improving economy, and reducing operating costs

Active Publication Date: 2014-08-13
郑新伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical method has high infrastructure and operating costs, and the chroma is difficult to deal with. The biochemical method is greatly affected by the load, water quality, and water volume, and the chroma is difficult to degrade and difficult to reach the standard stably.
The water COD after the pretreatment of the two is higher, which has a greater impact on the subsequent biochemical treatment

Method used

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  • Coking wastewater pretreatment method and coking wastewater pretreatment system
  • Coking wastewater pretreatment method and coking wastewater pretreatment system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 As shown, the coking wastewater pretreatment system includes a sump 1, a first regulating pond 2, a first sedimentation pond 3, an oxidation pond 4, a second regulating pond 5, a second Pool 7 and packed tower 8. Both the first sedimentation tank 3 and the second sedimentation tank 6 are connected with a sludge tank 9 through a pump.

[0018] The coking wastewater pretreatment method includes the following steps: (1) The coking wastewater passing through the grid enters the sump 1 with a total volume of 20 cubic meters. The wastewater enters the first regulating tank 2 through a pump, and 200 L of sulfurous acid with a concentration of 30 g / L is added. Iron solution, aerated and stirred for 10 minutes; (2) enter the first sedimentation tank 3 through the pump, and stir while adding cationic polyacrylamide (50 ionicity) with a molecular weight of 12 million until the mud and water in the first sedimentation tank 3 Stratification; (3) pump the solution ...

Embodiment 2

[0020] Such as figure 1 As shown, the coking wastewater pretreatment system includes a sump 1, a first regulating pond 2, a first sedimentation pond 3, an oxidation pond 4, a second regulating pond 5, a second Pool 7 and packed tower 8. Both the first sedimentation tank 3 and the second sedimentation tank 6 are connected with a sludge tank 9 through a pump.

[0021] Coking wastewater pretreatment method: (1) The coking wastewater passing through the grid enters the sump 1, with a total volume of 20 cubic meters. The wastewater enters the first regulating tank 2 through a pump, and 400L of ferrous sulfate solution with a concentration of 27g / L is added. Aeration and stirring for 15 minutes; (2) Then enter the first sedimentation tank 3 through the pump, and stir while adding cationic polyacrylamide (50 ionicity) with a molecular weight of 12 million until the mud and water in the first sedimentation tank 3 are separated; (3) Pump the solution in the upper layer into the oxida...

Embodiment 3

[0023] Such as figure 1 As shown, the coking wastewater pretreatment system includes a sump 1, a first regulating pond 2, a first sedimentation pond 3, an oxidation pond 4, a second regulating pond 5, a second Pool 7 and packed tower 8. Both the first sedimentation tank 3 and the second sedimentation tank 6 are connected with a sludge tank 9 through a pump.

[0024] Coking wastewater pretreatment method: (1) The coking wastewater passing through the grid enters the sump 1, with a total volume of 20 cubic meters. The wastewater enters the first regulating tank 2 through a pump, and 600L of ferrous sulfate solution with a concentration of 25g / L is added. Aeration and stirring for 20 minutes; (2) Enter the first sedimentation tank 3 through the pump, and stir while adding cationic polyacrylamide (80 ionicity) with a molecular weight of 12 million until the mud and water in the first sedimentation tank 3 are separated; (3) Pump the solution in the upper layer into the oxidation ...

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Abstract

The invention relates to a coking wastewater pretreatment method and a coking wastewater pretreatment system and belongs to the technical field of wastewater treatment. The method comprises the following steps: (1) adding a FeSO4 solution into coking wastewater and performing aeration stirring; (2) stirring while adding polyacrylamide until mud and water are layered; (3) adding hydrogen peroxide into an upper-layer solution and stirring; (4) adding Ca(OH)2 for adjusting the pH value to be 11-13.5, and after aerating and stirring to be uniform, stirring while adding polyacrylamide until mud and water are layered; (5) separating out the upper-layer solution, adjusting the pH value to be 5.0-7.0, feeding the upper-layer solution into a filled tower, and adding an active carbon catalyst for performing catalytic reaction for 2-4 hours. The method is safe, simple, efficient and very low in operating cost, and has wide application prospect in treatment of high-concentration wastewater generated in coal chemical industry.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a coking wastewater pretreatment method and system. Background technique [0002] Coal tar is a by-product of the coke production process and one of the important products of the coking industry. Coal tar is an organic mixture mainly composed of aromatic hydrocarbons. The main process of processing is distillation. The products obtained from deep processing such as light oil, phenol, naphthalene, washing oil, anthracene, carbazole, indole, and asphalt are a part of national economic development. A basic raw material. [0003] Pollutants in coking wastewater have a high concentration and complex composition. In addition to ammonia nitrogen, thiocyanide, and cyanide, they also contain monocyclic or polycyclic aromatic compounds such as phenol, indole, and quinoline, as well as nitrogen, sulfur, and oxygen-containing compounds. Heterocyclic organic pollutants ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 郑新伟
Owner 郑新伟
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