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Reverse osmosis treatent method and device for coking wastewater

A technology of coking wastewater and treatment methods, which is applied in metallurgical wastewater treatment, permeation/dialysis water/sewage treatment, chemical instruments and methods, etc., can solve the problem that the COD of the effluent is difficult to meet the standard, and achieve the avoidance of instability, system reliability, Troubleshooting Difficult Effects

Active Publication Date: 2011-05-04
HUAQI ENVIRONMENT PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It aims to overcome the defect that the existing coking wastewater biological treatment technology is difficult to treat the effluent COD, avoid biological treatment methods, and completely use membrane separation technology to treat coking wastewater

Method used

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  • Reverse osmosis treatent method and device for coking wastewater
  • Reverse osmosis treatent method and device for coking wastewater
  • Reverse osmosis treatent method and device for coking wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Complete a pilot plant of reverse osmosis treatment of coking wastewater, and install all the equipment in a 20-foot container. The design parameters of the equipment are: water inlet tank 500L, raw water pump 1m 3 / h, 3kg / cm 2 , multi-media filter Φ200mm, security filter Φ4″X20″PE melt-blown filter element 1, high-pressure water pump 1m 3 / h、60kg / cm 2 , reverse osmosis adopts Φ254X1110mm, 9m 2 One flat sewage treatment type reverse osmosis membrane, reverse osmosis production water tank 500L. In addition, the supporting reverse osmosis backwashing and cleaning water pump and the multi-media filter backwashing share one water pump, which is 2m 3 / h, 3kg / cm 2 , chemical online cleaning PE dosing box 100L2, dosing metering pump 0~14L / h, 7kg / cm 2 2 units.

[0020] The influent water volume is 900L / h, the reverse osmosis product water volume is 700L / h, and the reverse osmosis concentrate water volume is 200L / h.

[0021]Coking wastewater quality: COD 5504mg / L, NH 3 -...

Embodiment 2

[0025] Design a combined enhanced reverse osmosis system for coking wastewater. The design parameters of the system equipment are: (1) One-stage reverse osmosis system: water inlet tank 30m 3 , raw water pump 66.5m 3 / h, 3kg / cm 2 , multi-media filter Φ1600mm, a section of security filter Φ4″X40″PE melt-blown filter element 34 pieces, a section of high-pressure water pump 66.5m 3 / h、63kg / cm 2 , one stage of reverse osmosis adopts Φ254X1110mm, 9m 2 81 flat sewage treatment reverse osmosis membranes, 85% water production rate of the first stage of reverse osmosis, 30m reverse osmosis water production tank 3 , a section of reverse osmosis concentrated water tank 10m 3 , matching multi-media filter backwash pump 180m 3 / h, 3kg / cm 2 , a section of reverse osmosis backwash and cleaning water pump 100m 3 / h, 3kg / cm 2 , chemical on-line cleaning PE dosing box 2000L 2, dosing metering pump 0~150L / h, 7kg / cm 2 2 sets; (2) Two-stage reverse osmosis system: middle pump 10m 3 / h, 3...

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Abstract

The invention relates to a reverse osmosis treatment method and a device for coking waste water, and is characterized in that the method comprises the following process steps that: (1) coking waste water directly undergoes conventional deoiling pretreatment and then is fed into a system; (2) a multi-medium filter and a security filter are adopted to protect reverse osmosis so as to separate wastewater by means of a flat plate sewage treatment-type reverse osmosis membrane; and (3) according to the requirements of the further decrement of reverse osmosis thick water and the recycling of treated effluent, combined hardening is carried out by means of multi-section, multi-stage and various reverse osmoses. The reverse osmosis treatment method and the device have the advantages that: (1) themethod has high equipment degree, reliable system and less occupied area; (2) flat plate sewage treatment-type reverse osmosis is adopted to carry out treatment, thereby avoiding the instability of biological treatment; (3) the treated effluent is stable and reaches the standard with COD less than 100mg / L; (4) the COD of effluent which undergoes second-section second-stage reverse osmosis strengthening treatment is less than 15mg / L, therefore, the effluent can be recycled while thick water undergoes decrement burning; and (5), the method and the device solve the problem that coking waste water is difficult to treat.

Description

technical field [0001] The invention relates to a reverse osmosis treatment method and device for coking wastewater, belonging to the technical field of industrial wastewater treatment. Background technique [0002] Coking wastewater is one of the toxic and harmful high-concentration industrial wastewater. It mainly comes from the refining process of coking, gas purification, ammonium sulfate and benzene and other chemical products. Its composition is complex and contains a large amount of inorganic and organic pollutants. Its inorganic pollutants are mainly cyanide, thiocyanide, sulfide and ammonium salt, etc., and the organic pollutants are mainly phenolic compounds, accounting for more than 50% of the total pollutants. Organic pollutants also include aliphatic compounds, polysaccharides Ring aromatic compounds, heterocyclic compounds containing nitrogen, oxygen, sulfur. Because some aromatic compounds, fused ring compounds and heterocyclic compounds such as indole, pyrid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F1/40C02F1/44C02F103/16
Inventor 张博
Owner HUAQI ENVIRONMENT PROTECTION SCI & TECH