CN102398961A - Method and device for treating high-salt content water by hydro-power molecular membrane - Google Patents
Method and device for treating high-salt content water by hydro-power molecular membrane Download PDFInfo
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- CN102398961A CN102398961A CN2010102809008A CN201010280900A CN102398961A CN 102398961 A CN102398961 A CN 102398961A CN 2010102809008 A CN2010102809008 A CN 2010102809008A CN 201010280900 A CN201010280900 A CN 201010280900A CN 102398961 A CN102398961 A CN 102398961A
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Abstract
The invention discloses a method and a device for treating high-salt content water by a hydro-power molecular membrane. The device orderly comprises a material liquid tank, a water circulating pump, a membrane tank, a condenser, a product water tank and a vacuum pump. The material liquid tank is provided with an electric heating system and a temperature sensor. The device and the method adopt a core technology of a hydro-power molecular membrane, realize excellent and stable product water quality and a high salt rejection rate reaching 99.99%, have good COD and color removal effects, reduce energy consumption, wherein power consumption is in a range of 3 to 6KWh/m<3>, prolong a hydro-power molecular membrane service life, greatly resist pollution, realize a high water production flux of 10 to 100L/m<2>*h, solve the problems of hydrophobic membrane aperture wetting and wire fracture in membrane distillation, and adopt heat sources such as industrial waste heat, underground heat, solar energy and the like so that high-efficiency and energy-saving high-salt content water treatment is realized.
Description
Technical field
The present invention relates to a kind of method and apparatus of handling haline water, relate to the method and apparatus that a kind of membrane technique is handled haline water specifically.
Background technology
The pollution of water resources also is the difficult problem that the China and even the whole world face; At present; The Taihu Lake water system in the Changjiang river district, northwest Zhu He, Huaihe River district, the Yellow River district and Haihe River district have nearly half the waterhead area water quality defective; The defective waterhead area in Song Hua River district and Liaohe River district accounts for 1/3rd, and China has 1.9 hundred million people's tap water harmful substance contents to exceed standard.Shortage of water resources and water ecological environment worsen the bottleneck that has become the sustainable economic development of restriction Chinese society.
Contain a large amount of salinities in the haline water; Enter water body and will cause severe contamination water body; Simultaneously human being's production environment and HUMAN HEALTH are caused serious harm, its main source comprises the discharge of wastewater of salt chemical engineering industry, the strong brine of r-o-(RO) technology preparation pure water generation and the strong brine that desalting process produces.Wherein saltiness is also higher in the 30% dense water of RO generation, and the RO scale of the project is increasing thereupon, and the amount of dense water is also increasing.Like a RO workshop of Yanshan Petrochemical, the dense water yield of every day just has more than 20,000 ton.The haline water discharging will highlight the pollution problem of environment day by day.
At present, the treatment process of haline water mainly is direct discharging, as enters ocean, surface water, evaporation tank, Sewage treatment systems and deep-well injection etc., and these methods all cause certain harm to environment.The film distillation technology of new development in recent years is better to the haline water treatment effect, but because of the restriction of hydrophobic film material and film product, has hindered the large-scale engineering applications of membrane distillation.Therefore need the development of new otherwise effective technique to solve the problem of environmental pollution that the haline water discharging causes.
The high temperature side that the contriver proposes to utilize gas to carry and act on hydrophobic film in the patent of invention 200810119250.1 forms biphase gas and liquid flow; Through the souring of bubble, reduce the concentration polarization of membrane distillation, and increase the face flow velocity face; Membrane flux is increased, and the pollution of control hydrophobic membrane.Though the flux to membrane distillation has the improvement effect, but still can not solve the wetting present situation of film.Membrane distillation uses the hydrophobic film material studying always, but does not have the fine product to release yet; And the hydrophobic membrane that the membrane distillation process is used is hollow-fibre membrane, the situation of fracture of wire under the high temperature and high salt condition, very easily occurs, and these factor factors have restricted the large-scale engineering applications of membrane distillation in haline water is handled.
Summary of the invention
The present invention adopts water power molecular film technology, and the core of technology is the water power molecular film, and the water power molecular film is the flat sheet membrane form, processes the tubular membrane part.Water power molecular film surface atresia; Gas can not see through; But water molecules can combine with the charged group on film surface, and under the effect of film opposite side vacuum, moves to the opposite side of film from a side positioning of film, and face has repulsive interaction to salt, non-solubility solid matter and bacterium etc.The membrane process principle is following: the waste water under the certain temperature, and water molecules pedesis aggravation after temperature raises, large quantity of moisture is built up on the film surface; Water molecules combines with the hydrophilic charged group on film surface; And move, provide under the effect of certain vacuum tightness water molecules to the inlet side directional migration at the film opposite side, arrive behind the film surface to be shifted rapidly and leave face by vacuum; Get into condenser system, condensation obtains liquid and produces water.This process has realized the processing of haline water, produces water water quality good, stable, the nearly pure water of electric connection.
The object of the present invention is to provide a kind of water power molecular film to handle the device of haline water.This device comprises material liquid tank (1), water circulating pump (2), membrane cisterna (3), condensing surface (4) successively, produces water pot (5), vacuum pump (6); Said material liquid tank (1) comprises electric heating system (7), TP (8) and water discharge valve (9); Said membrane cisterna (3) comprises film group (10), vacuum zone (11), hydrothermal area (12) and return line (13), and is equipped with under meter (14) and TM (15) in membrane cisterna (3) import, is equipped with TM (16) and vacuum pressure gauge (17) in membrane cisterna (3) outlet; It is characterized in that material liquid tank (1) links to each other with water circulating pump (2), hydrothermal area (12) successively, vacuum zone (11) link to each other with vacuum pump (6), condensing surface (4) and product water pot (5), and electric heating system (7) links to each other with TP (8).
This contrive equipment is mainly used in the processing of haline water; Haline water is mainly derived from the strong brine of saliferous trade effluent, the dense water of r-o-(RO) and the desalting process generation of the discharging of salt chemical engineering industry; All haline waters all have stronger corrodibility; And material liquid tank waste water heats through electric heating system during the operation of this device; Optimum temperature range is 40 ℃ to 80 ℃, so material liquid tank, water circulating pump, membrane cisterna, condensing surface, product water pot, water discharge valve, under meter, TM, vacuum pressure gauge and each pipeline are processed by the heatproof impregnating material.Material liquid tank seals, to guarantee the temperature of feed liquid.Membrane cisterna divides vacuum zone and hydrothermal area, and the feed liquid of heat gets into the hydrothermal area, directly contacts with the film that is immersed in membrane cisterna.The film group is made up of 1 tubular type water power molecular film film spare at least, communicates in vacuum zone and the film pipe, and vacuum pump provides maximum vacuum to be-0.1MPa.
Another object of the present invention is to provide a kind of method that adopts the water power molecular film processing haline water of said apparatus, and this process method comprises the steps:
(1) high-salt wastewater at first gets into material liquid tank, and through the electric heating system heating, electric heating system is controlled by TP;
(2) feed liquid that is heated to certain temperature is through recycle pump entering membrane cisterna bottom the hydrothermal area, and TM monitoring feed liquid is advanced the temperature before the film, under meter monitoring flooding velocity;
(3) gaseous state of vacuum zone product water is extracted out by vacuum pump, to condensing surface, and the temperature that the TM in membrane cisterna exit monitoring gaseous state produces water, the vacuum tightness of vacuum pressure gauge monitoring water production system;
(4) the liquid water that produces gets into the product water pot after condenser condenses, produces water flux at 10L/m
2.h～100L/m
2.h;
(5) the dense water of material liquid tank is discharged through water discharge valve.
Handle the strong brine that saliferous trade effluent, the dense water of RO, seawater and desalting process produce through this method, produce water water quality good, stable, ratio of desalinization reaches 99%～99.99%, chroma removal rate 100%.
The present invention compared with prior art; Have the following advantages and the high-lighting effect: be used for the processing of the strong brine of the dense water of RO, saliferous trade effluent, seawater and desalting process generation; The effluent quality good, stable, ratio of desalinization reaches 99.99%, and is good to COD and chromaticity removing effect; Save energy consumption, power consumption is 3～6KWh/m
3Produce the moisture film flux and reach 10L/m
2.h～100L/m
2.h; Water power molecular film long service life, high antipollution; Solved the wetting problem with fracture of wire of hydrophobic membrane fenestra in the membrane distillation process; Can utilize thermals source such as industrial waste heat, underground heat, sun power, be a kind of energy-efficient formula haline water treatment process and device.
Description of drawings
Fig. 1 is the method and apparatus process flow diagram that a kind of water power molecular film provided by the invention is handled haline water.
Among the figure: 1-material liquid tank, 2-water circulating pump, 3-membrane cisterna, 4-condensing surface, 5-produce water pot, 6-vacuum pump, 7-electric heating system, 8-TP, 9-water discharge valve, 10-film group, 11-vacuum zone, 12-hydrothermal area, 13-return line, 14-under meter, 15-TM, 16-TM, 17-vacuum pressure gauge;
Embodiment
Specify embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
As shown in the figure, this device comprises material liquid tank (1), water circulating pump (2), membrane cisterna (3), condensing surface (4) successively, produces water pot (5), vacuum pump (6); Said material liquid tank (1) comprises electric heating system (7), TP (8) and water discharge valve (9); Said membrane cisterna (3) comprises film group (10), vacuum zone (11), hydrothermal area (12) and return line (13), and is equipped with under meter (14) and TM (15) in membrane cisterna (3) import, is equipped with TM (16) in membrane cisterna (3) outlet; It is characterized in that material liquid tank (1) links to each other with water circulating pump (2), hydrothermal area (12) successively, vacuum zone (11) link to each other with vacuum pump (6), condensing surface (4) and product water pot (5), and electric heating system (7) links to each other with TP (8).
The invention provides a kind of method that adopts the water power molecular film processing haline water of said apparatus, this process method comprises the steps:
(1) high-salt wastewater at first gets into material liquid tank, and through the electric heating system heating, electric heating system is controlled by TP;
(2) feed liquid that is heated to certain temperature is through recycle pump entering membrane cisterna bottom the hydrothermal area, and TM monitoring feed liquid is advanced the temperature before the film, under meter monitoring flooding velocity;
(3) gaseous state of vacuum zone product water is extracted out by vacuum pump, to condensing surface, and the temperature that the TM in membrane cisterna exit monitoring gaseous state produces water, the vacuum tightness of vacuum pressure gauge monitoring water production system;
(4) liquid state after condenser condenses is produced water and is got into the product water pot, produces water flux at 10L/m
2.h～100L/m
2.h;
(5) the dense water of material liquid tank is discharged through water discharge valve.
Handle the strong brine that saliferous trade effluent, the dense water of RO, seawater and desalting process produce through this method, produce water water quality good, stable, ratio of desalinization reaches 99%～99.99%, chroma removal rate 100%.
Below enumerate several instances effect of the present invention is described, but claim scope of the present invention is not limited only to this.
Instance 1: the strong brine that sewage source RO system produces, condition of water quality is: specific conductivity is 100000 μ s/cm, colourity 80.The water power molecular film is handled the device of haline water waste water is handled, and the film group adopts 1 tubular type water power molecular film film spare, 40 ℃ of feed liquid inflow temperatures, and vacuum tightness is-0.1MPa.Final outflow water specific conductivity 53 μ s/cm, no colourity, ratio of desalinization reaches 99.9%, chroma removal rate 100%, the average flux that film produces water remains on 10L/m always
2.h;
Instance 2: sewage source is the biochemical system water outlet of certain coke-oven plant, and condition of water quality is: COD
CrContent 680mg/L, SS are 600mg/L, specific conductivity 8900 μ s/cm, colourity 500; The device that adopts the water power molecular film to handle haline water is handled waste water, and the film group adopts 1 tubular type water power molecular film film spare, 80 ℃ of feed liquid inflow temperatures, and vacuum tightness is-0.1MPa.The final outflow water specific conductivity is 90 μ s/cm, COD
CrBe 50mg/L, no colourity, total nitrogen concentration is less than 10mg/L, and promptly ratio of desalinization is 99%, 100% removal colourity, reaches industry discharging one-level A standard, and the average flux that film produces water remains on 100L/m always
2.h.
Instance 3: the sewage source seawater, condition of water quality is: specific conductivity is 32000 μ s/cm, colourity 30.The water power molecular film is handled the device of haline water waste water is handled, and the film group adopts 14 tubular type water power molecular film film spares, 60 ℃ of feed liquid inflow temperatures, and vacuum tightness is-0.1MPa.Final outflow water specific conductivity 3.0 μ s/cm, no colourity, ratio of desalinization reach 99.99%, 100% and remove colourity, and the average flux that film produces water remains on 25L/m always
2.h;
Instance 4: sewage source is the strong brine that desalting process produces, and condition of water quality is: specific conductivity is 100000 μ s/cm, colourity 90.The water power molecular film is handled the device of haline water waste water is handled, and the film group adopts 14 tubular type water power molecular film film spares, 60 ℃ of feed liquid inflow temperatures, and vacuum tightness is-0.1MPa.Final outflow water specific conductivity 3.0 μ s/cm, no colourity, ratio of desalinization reach 99.99%, 100% and remove colourity, and the average flux that film produces water remains on 30L/m always
2.h.
Claims (9)
1. a water power molecular film is handled the device of haline water, and this device comprises material liquid tank (1), water circulating pump (2), membrane cisterna (3), condensing surface (4), product water pot (5), vacuum pump (6) successively; Said material liquid tank (1) comprises electric heating system (7), TP (8) and water discharge valve (9); Said membrane cisterna (3) comprises film group (10), vacuum zone (11), hydrothermal area (12) and return line (13), and is equipped with under meter (14) and TM (15) in membrane cisterna (3) import, is equipped with TM (16) and vacuum pressure gauge (17) in membrane cisterna (3) outlet; It is characterized in that material liquid tank (1) links to each other with water circulating pump (2), hydrothermal area (12) successively, vacuum zone (11) link to each other with vacuum pump (6), condensing surface (4) and product water pot (5), and electric heating system (7) links to each other with TP (8).
2. a kind of water power molecular film according to claim 1 is handled the device of haline water; It is characterized in that said material liquid tank, water circulating pump, membrane cisterna, condensing surface, product water pot, water discharge valve, under meter, TM, vacuum pressure gauge and each pipeline are processed by the heatproof impregnating material.
3. a kind of water power molecular film according to claim 1 is handled the device of haline water, it is characterized in that said material liquid tank seals.
4. a kind of water power molecular film according to claim 1 is handled the device of haline water, it is characterized in that said membrane cisterna divides vacuum zone and hydrothermal area.
5. a kind of water power molecular film according to claim 1 is handled the device of haline water, it is characterized in that said film group is made up of 1 tubular type water power molecular film film spare at least.
6. adopt the method for a kind of water power molecular film processing haline water of device according to claim 1, it is characterized in that this process method comprises the steps:
(1) high-salt wastewater at first gets into material liquid tank, and through the electric heating system heating, electric heating system is controlled by TP;
(2) feed liquid that is heated to certain temperature is through recycle pump entering membrane cisterna bottom the hydrothermal area, and TM monitoring feed liquid is advanced the temperature before the film, under meter monitoring flooding velocity;
(3) the gaseous state product water that is gathered in the vacuum zone is extracted out by vacuum pump, to condensing surface, and the temperature that the TM in membrane cisterna exit monitoring gaseous state produces water, the vacuum tightness of vacuum pressure gauge monitoring water production system;
(4) liquid state after condenser condenses is produced water and is got into the product water pot, produces water flux 10L/m
2H～100L/m
2H;
(5) the dense water of material liquid tank is discharged through water discharge valve.
7. a kind of water power molecular film according to claim 4 is handled the method for haline water, it is characterized in that, handles the strong brine that saliferous trade effluent, the dense water of RO, seawater and desalting process produce, and ratio of desalinization reaches 99%～99.99%, chroma removal rate 100%.
8. a kind of water power molecular film according to claim 4 is handled the method for haline water, it is characterized in that material liquid tank waste water heats through electric heating system, and optimum temperature range is 40 ℃～80 ℃.
9. a kind of water power molecular film according to claim 4 is handled the method for haline water, it is characterized in that, the maximum vacuum that vacuum pump provides is-0.1MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102809008A CN102398961A (en) | 2010-09-14 | 2010-09-14 | Method and device for treating high-salt content water by hydro-power molecular membrane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102809008A CN102398961A (en) | 2010-09-14 | 2010-09-14 | Method and device for treating high-salt content water by hydro-power molecular membrane |
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| CN102398961A true CN102398961A (en) | 2012-04-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105198141A (en) * | 2014-06-06 | 2015-12-30 | 中国石油化工股份有限公司 | High-temperature high-salinity wastewater zero-discharging method |
| WO2018045707A1 (en) * | 2016-09-06 | 2018-03-15 | 大唐环境产业集团股份有限公司 | Water treatment device and method using waste heat from power plant |
-
2010
- 2010-09-14 CN CN2010102809008A patent/CN102398961A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105198141A (en) * | 2014-06-06 | 2015-12-30 | 中国石油化工股份有限公司 | High-temperature high-salinity wastewater zero-discharging method |
| CN105198141B (en) * | 2014-06-06 | 2018-11-02 | 中国石油化工股份有限公司 | A kind of Zero emission method of high temperature and high salt waste water |
| WO2018045707A1 (en) * | 2016-09-06 | 2018-03-15 | 大唐环境产业集团股份有限公司 | Water treatment device and method using waste heat from power plant |
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Application publication date: 20120404 |