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Tar wastewater treatment method

A waste water treatment, tar technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as poor waste water treatment effect and low tar removal rate

Active Publication Date: 2014-12-10
广州北港能源环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is that the tar removal rate of prior art tar waste water is low, causes waste water treatment effect not good, thereby proposes a kind of tar material removal rate high, the water quality meets the tar waste water treatment method of national standard requirement

Method used

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  • Tar wastewater treatment method

Examples

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Effect test

Embodiment 1

[0020] (1) Filter 14L of thick black coal tar wastewater with a 50-80 mesh screen to remove solids, add 0.4g of polyoxyethylene polyoxypropylene stearyl ether and 1L of simethicone to the tar wastewater, mix evenly, and let stand and separation to obtain the upper black simethicone layer and the lower turbid water layer I;

[0021] (2) Continuously inject nitrogen gas into the black simethicone oil layer, the flow rate of nitrogen gas is 30mL / min, at the same time heat the simethicone oil layer to 140-160°C for polycondensation for 7-8h, cool to 8°C and use 150-mesh screen filtration and separation to obtain solid primary polymer;

[0022] (3) Continue to polymerize the solid primary polymer at 360-380°C for 5-6h under the protection of nitrogen to obtain asphaltene I;

[0023] (4) Add hydrolytic bacteria and acid-producing bacteria to the water layer and mix them at 30°C for 9 hours, then treat with anaerobic bacteria and aerobic bacteria, finally settle out solids, and use ...

Embodiment 2

[0025] (1) Filter 30L of thick black coal tar wastewater with a 70-100 mesh screen to remove solids, add 0.75g of polyoxyethylene polyoxypropylene stearyl ether and 1L of simethicone to the tar wastewater, mix evenly, and let stand and separation to obtain the upper black simethicone oil layer and the lower turbid water layer II;

[0026] (2) Continuously feed nitrogen into the black dimethyl silicone oil layer, the flow rate of nitrogen gas is 60mL / min. 150-mesh screen filtration and separation to obtain solid primary polymer;

[0027] (3) Continue to polymerize the solid primary polymer at 300-350°C for 3-4h under the protection of nitrogen to obtain asphaltene II;

[0028] (4) Add hydrolytic bacteria and acid-producing bacteria to the water layer and mix and treat at 32°C for 8 hours, then treat with anaerobic bacteria and aerobic bacteria, finally settle out solids, and use a mixture of graphitized carbon black and activated carbon to absorb water Water body II is obtain...

Embodiment 3

[0030] (1) Filter 35L of thick black coal tar wastewater with a 60-90 mesh screen to remove solids, add 0.83g of polyoxyethylene polyoxypropylene stearyl ether and 1L of simethicone to the tar wastewater, mix evenly, and let stand and separation to obtain the upper black simethicone oil layer and the lower turbid water layer III;

[0031] (2) Continuously inject nitrogen gas into the black simethicone oil layer, the flow rate of nitrogen gas is 100mL / min, at the same time heat the simethicone oil layer to condense at 160-180°C for 5-6h, cool to 10°C and use 150-mesh screen filtration and separation to obtain solid primary polymer;

[0032] (3) Continue to polymerize the solid primary polymer at 380-400°C for 4-5h under the protection of nitrogen to obtain asphaltene III;

[0033] (4) Add hydrolytic bacteria and acid-producing bacteria to the water layer and mix them at 35°C for 7 hours, then treat with anaerobic bacteria and aerobic bacteria, finally settle out solids, and us...

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Abstract

The invention discloses a tar wastewater treatment method which comprises the following steps: filtering tar wastewater to remove solids, adding a demulsifier and dimethylsilicone oil into the tar wastewater, mixing, standing, and separating to obtain a dimethylsilicone oil layer at the upper part and a water layer at the lower part; continuously introducing nitrogen, heating to 120-180 DEG C, performing condensation polymerization for 5-8 hours, cooling to be lower than 10 DEG C, and filtering to obtain a solid prepolymer; polymerizing the solid prepolymer at 300-400 DEG C for 3-6 hours under the protection of nitrogen to obtain asphalt; acidifying and hydrolyzing the water layer, performing aerobic treatment, settling, and adsorbing, so that the tar wastewater can be discharged by standard. The method is suitable for purifying the tar wastewater generated in gasoline or coal production and processing to remove most tar substances in the wastewater and enabling the wastewater to meet the national emission standards.

Description

Technical field [0001] The invention relates to the technical field of tar wastewater treatment, and in particular to a method for treating tar wastewater. Background technique [0002] The production and processing of minerals such as petroleum and coal often involves water washing, and a large amount of tar wastewater is easily produced during the water washing process. As the name suggests, the harmful components in tar wastewater are mainly tar. Tar is a complex compound containing more than 100 components, including organic matter such as alkanes, aromatic hydrocarbons, and colloids. During water washing, some tar substances dissolve into the water and become wastewater. . In addition to tar, tar wastewater also contains phenolic substances, ammonia nitrogen substances, cyanide and solid particles. [0003] The treatment of tar wastewater mainly targets tar substances, including gravity separation methods, adsorption methods, etc. However, the oil removal rate of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C10C3/02
Inventor 王茜茜王永和
Owner 广州北港能源环保有限公司
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