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Oil separation and removal process for coal-based needle coke wastewater

A needle coke and waste water technology, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. problems, to achieve the effect of reducing oil content, reducing oil concentration and reducing load

Active Publication Date: 2022-04-12
华夏碧水环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects in the prior art that the needle coke wastewater has a large coal tar content, it is not convenient for subsequent treatment, or the subsequent treatment load is large and the cost is high, the present invention provides a combined oil separation and degreasing process for coal series needle coke wastewater, Through the organic combination of oil separation and precipitation + demulsification air flotation oil removal + high-efficiency collision degreaser, various oil removal methods are organically combined, especially the oil coarse-grained separation area in the high-efficiency collision degreaser adopts a collision water distributor with a specific structure to cooperate with the connection Branched modified polyethylene filler can efficiently remove slick oil and dispersed oil remaining in the effluent of air flotation and degreasing, which can greatly reduce the load of subsequent Fenton catalytic oxidation process or biochemical treatment, reduce costs and improve treatment effect

Method used

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  • Oil separation and removal process for coal-based needle coke wastewater
  • Oil separation and removal process for coal-based needle coke wastewater
  • Oil separation and removal process for coal-based needle coke wastewater

Examples

Experimental program
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Effect test

preparation example 1

[0066] Immerse 100 parts of the honeycomb high-density polyethylene (HDPE) after surface cleaning in the acetone solution of 5 wt % benzophenone for 24 hours, take it out and dry it at 60 ° C to obtain a polyethylene material coated with a photosensitizer on the surface , and then dipped in a quartz tube filled with an acetone solution with a total mass concentration of 9.6 wt% of the grafted monomers, the grafted monomers are methyl methacrylate, isocenyl methacrylate, and acryloyloxyethyl cinnamate According to the mixture with a mass ratio of 3:3:1, the quartz tube containing the monomer solution was passed through nitrogen to remove oxygen in advance, and irradiated with a 400W high-pressure mercury lamp with a distance of 20cm and an irradiation time of 6h. After the reaction, the grafted modified polyethylene material was removed. , reflux extraction in acetone for 5 hours, fully remove the unreacted monomers on the surface of the modified polyethylene, monomer polymers a...

preparation example 2

[0068] Other conditions and operations were the same as those in Preparation Example 1, except that the ultraviolet light was irradiated for 10 h, and the grafting ratio of the finally obtained grafted modified polyethylene was 7.8%.

preparation example 3

[0070] Other conditions and operations were the same as those in Preparation Example 1, except that the ultraviolet light was irradiated for 3 hours, and the graft ratio of the finally obtained graft-modified polyethylene was 3.9%.

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Abstract

The invention relates to an oil separation and removal process for coal-based needle coke wastewater, which is characterized by comprising the following steps: (1) oil separation precipitation treatment; (2) demulsification and air flotation oil removal; (3) removing oil by an efficient collision oil remover; wherein the efficient collision oil remover sequentially comprises the following three parts: an oil coarse graining separation zone, a floating oil cyclone separation zone and a microbubble flotation oil removal zone, the oil coarse graining separation zone mainly comprises a collision water distributor and a graft modified polyethylene honeycomb filler, and the graft modified polyethylene is obtained by polymerizing polyethylene and a graft monomer; the grafting monomer is a compound of (methyl) acrylate and (methyl) acryloyloxyethyl cinnamate. Through combination of the processes, the oil content of the coal-based needle coke wastewater is greatly reduced, especially the coal tar parts, such as emulsified oil and dissolved oil, which cannot be effectively removed by conventional means, is reduced, and the load and the cost are reduced for subsequent treatment.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to an oil separation and degreasing process for coal series needle coke wastewater. Background technique [0002] Needle coke is a high-quality carbon material that was vigorously developed in the 1970s. Because of its low content of sulfur, nitrogen and other elements, it has a low thermal expansion coefficient and suitable electrical resistivity, and is ideal for preparing high-power (HP), ultra-high The most important raw material for power (UHP) electrodes. The high-power and ultra-high-power graphite electrodes made of it have outstanding advantages such as small resistivity, small thermal expansion coefficient, strong thermal shock resistance, high mechanical strength, and good oxidation resistance. Needle coke is divided into oil-based needle coke and coal-based needle coke according to different raw materials. Coal-based needle coke is produced from coal tar distillate oi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F9/14
Inventor 张传兵李永杰苏继明王慧芳赵曙光姜凤成李小燕杨鹏徐漫漫
Owner 华夏碧水环保科技股份有限公司
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