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High-temperature-condensed-water oil removing technology

A high-temperature condensate water and process technology, applied in water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of poor water impact resistance of filter membranes, small water production, and secondary pollution and other problems, to achieve the effect of low water pretreatment requirements, long membrane service life and easy cleaning

Active Publication Date: 2016-09-07
ZHEJIANG CATHAYRIPE ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water yield of this method is small; the filter membrane has poor resistance to water impact, which may easily cause the leakage of the adsorbed substances and cause secondary pollution.

Method used

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  • High-temperature-condensed-water oil removing technology
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  • High-temperature-condensed-water oil removing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] The inorganic carbon membrane includes a support layer and a separation layer;

[0100] The thickness of the separation layer is 0.05 microns;

[0101] The filter pore size of the separation layer is 20nm;

[0102] The support layer is composed of parts by weight:

[0103] Aggregate: 40 parts coal powder, 10 parts phenolic resin, 20 parts white carbon black, 5 parts bentonite, 8 parts burnt kaolin;

[0104] Pore-forming agent: 0.5 parts of purple wood knot, 0.3 parts of serpentine powder;

[0105] Additives: 1 part of copper nitrate, 2 parts of dimethyl disilane modified silica;

[0106] Dispersant: 0.8 parts of lecithin.

[0107] The preparation steps of the separation layer are:

[0108] Ingredients: 15 parts of white carbon black, 25 parts of coal powder, 0.5 parts of purple wood knots are prepared according to the weight ratio;

[0109] Coating solution solvent preparation: weigh and mix glycerol, ethylene glycol and 1,4-butanediol in a volume ratio of 10:8:30;

[0110] Separation ...

Embodiment 2

[0114] The inorganic carbon membrane includes a support layer and a separation layer;

[0115] The thickness of the separation layer is 1 micron;

[0116] The filter pore size of the separation layer is 10 microns;

[0117] The support layer is composed of parts by weight:

[0118] Aggregate: 50 parts coal powder, 15 parts phenolic resin, 30 parts white carbon black, 9 parts bentonite, 4 parts burnt kaolin;

[0119] Pore-forming agent: 1 part of Zimujie, 0.8 part of serpentine powder;

[0120] Additives: 2 parts of copper nitrate, 4 parts of fatty acid modified calcium carbonate;

[0121] Dispersant: 1.2 parts of lecithin.

[0122] The preparation steps of the separation layer are:

[0123] Ingredients: Prepare 20 parts of white carbon black, 30 parts of coal powder and 1 part of purple wood knot by weight;

[0124] Coating liquid solvent preparation: weigh and mix glycerol, ethylene glycol and 1,4-butanediol in a volume ratio of 15: 16:18;

[0125] Separation layer slurry preparation: first ...

Embodiment 3

[0129] The inorganic carbon membrane includes a support layer and a separation layer;

[0130] The thickness of the separation layer is 0.05 microns;

[0131] The ratio of the thickness of the separation layer to the thickness of the support layer is 1:100; the filter pore size of the separation layer is 20nm;

[0132] The separation layer is formed by multiple coatings, thereby obtaining the pore diameter gradient of the support layer, the inner layer of the separation layer, and the outer layer of the separation layer that gradually become smaller;

[0133] A water-producing channel is formed between the flat-plate inorganic carbon film and the inorganic carbon film arranged side by side, and the ratio of the thickness of the flat-plate inorganic carbon film to the height of the water-producing channel is 1:4.

[0134] The support layer is composed of parts by weight:

[0135] Aggregate: 45 parts of coal powder, 13 parts of phenolic resin, 22 parts of white carbon black, 6 parts of ben...

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Abstract

The invention provides a high-temperature-condensed-water oil removing technology. The high-temperature-condensed-water oil removing technology comprises a carrier-type membrane assembly filtering stage and an active carbon filter oil removing stage and includes the specific following steps that 1, high-temperature condensed water is injected into a carrier-type membrane assembly from a raw water tank through a circulating pump; 2, the carrier-type membrane assembly filtering stage is carried out in a cross flow filtration mode, wherein the membrane face flow speed is 0.1 m / s to 5 m / s, the transmembrane pressure difference is 0.01 MPa to 0.3 MPa, the filtering accuracy of the membrane assembly is 0.001 micron to 100 microns, and the recirculation ratio is 80% to 99%; 3, the active carbon filter oil removing stage is carried out in a dead-end filtration mode, wherein the filtering speed is 3 m / s to 5 m / s. Compared with the existing high-temperature-condensed-water oil removing technology, the high-temperature-condensed-water oil removing technology has the advantages that cost is low, oil removing efficiency is high, and produced water meets the requirement for boiler feedwater and stable in quality.

Description

Technical field [0001] The invention relates to a high-temperature condensed water degreasing process, which belongs to the field of water purification. Background technique [0002] Chemical plants and thermal power plants mostly use hot steam as thermal power. After power consumption and heat exchange, the hot steam becomes condensed water, and its heat accounts for 20%-30% of the total steam energy. This is a part of excellent desalinated water resources, but it often contains trace amounts of oil. Generally, the oil content is between 1 and 150㎎ / L, which is much higher than the boiler feed water oil quality standard, so it cannot be directly used as boiler feed water. The difference in equipment and operating time results in different types and quantities of oil in the condensate. Different recovery methods result in different states of the oil in the condensate. In addition, the high temperature of the condensate makes the treatment of high-temperature condensate extremely d...

Claims

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Application Information

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IPC IPC(8): C02F9/02
CPCC02F1/283C02F1/444C02F9/00
Inventor 周江梁红波李光辉
Owner ZHEJIANG CATHAYRIPE ENVIRONMENTAL ENG
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