CN215667258U - High-salinity wastewater low-energy-consumption reverse osmosis device - Google Patents
High-salinity wastewater low-energy-consumption reverse osmosis device Download PDFInfo
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- CN215667258U CN215667258U CN202122169047.9U CN202122169047U CN215667258U CN 215667258 U CN215667258 U CN 215667258U CN 202122169047 U CN202122169047 U CN 202122169047U CN 215667258 U CN215667258 U CN 215667258U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
一种高盐废水低能耗反渗透装置，包括保安过滤器、高压泵、进水管道、第一段膜壳、段间管道、第二段膜壳、产水管、浓水管道和控制箱；所述控制箱内部设置控制系统，控制系统控制连接高压泵；所述保安过滤器过滤精度为5μm，其内置寸PP材质折叠滤芯；所述保安过滤器的出水端与高压泵的进水端连接；所述高压泵的出水端与进水管道的进水端连接；多个第一段膜壳的进水端均连接进水管道的出水端；所述第一段膜壳内部设置反渗透膜；所述第二段膜壳的浓水出水端连接浓水管道；第二段膜壳内部设置梯形格网流道的低脱盐率的膜元件，脱盐率低至99.2％。本实用新型，结构合理，效率高，实现节能降耗，抗污堵能力强，运行稳定。
A low-energy-consumption reverse osmosis device for high-salt wastewater, comprising a security filter, a high-pressure pump, a water inlet pipeline, a first-stage membrane shell, an inter-stage pipeline, a second-stage membrane shell, a water production pipe, a concentrated water pipeline, and a control box; A control system is arranged inside the control box, and the control system controls and connects the high-pressure pump; the filtration precision of the security filter is 5 μm, and its built-in PP material pleated filter element; the water outlet end of the security filter is connected with the water inlet end of the high-pressure pump; The water outlet end of the high-pressure pump is connected with the water inlet end of the water inlet pipe; the water inlet ends of the plurality of first-stage membrane shells are connected to the water outlet end of the water inlet pipe; a reverse osmosis membrane is arranged inside the first-stage membrane shell; The concentrated water outlet end of the second-stage membrane shell is connected to the concentrated-water pipeline; the second-stage membrane shell is provided with a low-salt-rejection membrane element with a trapezoidal grid flow channel, and the salt-rejection rate is as low as 99.2%. The utility model has the advantages of reasonable structure, high efficiency, energy saving and consumption reduction, strong anti-pollution blocking ability and stable operation.
Description
Technical Field
The utility model relates to the field of high-salinity wastewater treatment equipment, in particular to a high-salinity wastewater low-energy-consumption reverse osmosis device.
Background
With the requirements of national environmental protection policy, zero discharge of wastewater is promoted.
High salinity wastewater generally has the characteristics of high salinity, high organic matter content and the like. The high-salinity wastewater zero-discharge treatment usually needs reverse osmosis concentration in advance and then evaporation crystallization treatment.
The design of traditional reverse osmosis unit adopts the one-level two segmentation, because second section membrane is intake pressure and is reduced and the salinity risees, can cause two-stage section membrane water yield very little under equal desalination to make the water yield of first section membrane rise. In order to overcome the above problems, a booster pump is usually designed between the two sections to balance the flux of the two sections of membranes, so as to improve the recovery rate of the system; however, the system has high energy consumption in operation, the second section of reverse osmosis membrane has serious organic pollution blockage, and the membrane cleaning frequency is high, so that the continuous and stable operation of the reverse osmosis is influenced.
In summary, the traditional high-salinity wastewater pre-concentration reverse osmosis system has the following three defects:
1. the operation energy consumption is high, and the intersegmental booster pump increases the power consumption and the fault point of the system operation.
2. The membrane fouling is serious, especially the second stage membrane: the second section of membrane has very high water inlet pressure and high organic matter concentration, and can cause the membrane to have serious organic fouling and blockage.
3. The operation stability is poor, the membrane is cleaned frequently, and the service life is short.
SUMMERY OF THE UTILITY MODEL
Objects of the utility model
In order to solve the technical problems in the background art, the utility model provides a high-salinity wastewater low-energy-consumption reverse osmosis device which is reasonable in structure, high in working efficiency, high in energy-saving and consumption-reducing capacity, high in anti-fouling and anti-blocking capacity and stable in operation.
(II) technical scheme
In order to solve the problems, the utility model provides a high-salinity wastewater low-energy-consumption reverse osmosis device which comprises a security filter, a high-pressure pump, a water inlet pipeline, a first section of membrane shell, an inter-section pipeline, a second section of membrane shell, a water production pipe, a concentrated water pipeline and a control box, wherein the security filter is arranged on the first section of membrane shell;
a control system is arranged in the control box and is in control connection with the high-pressure pump;
the filtering precision of the cartridge filter is 5 microns, and a folding filter element made of an inch PP material is arranged in the cartridge filter;
the water outlet end of the cartridge filter is connected with the water inlet end of the high-pressure pump; the water outlet end of the high-pressure pump is connected with the water inlet end of the water inlet pipeline;
the water inlet ends of the first section membrane shells are connected with the water outlet end of the water inlet pipeline; the water production and outlet ends of the first section of membrane shells are all connected with a water production pipe, and the concentrated water outlet ends of the first section of membrane shells are all connected with the water inlet end of the intersegmental pipeline; a reverse osmosis membrane is arranged in the first section of membrane shell;
the water outlet end of the intersegment pipeline is connected with the water inlet end of the second section of membrane shell;
the concentrated water outlet end of the second section of membrane shell is connected with a concentrated water pipeline;
wherein, the second section of membrane shell is internally provided with a membrane element with low desalination rate of the trapezoidal grid flow channel, and the desalination rate is as low as 99.2%.
Preferably, comprises a water production return pipe; the water production outlet end of the second section of membrane shell is connected with the water inlet end of the water production return pipe; and the water outlet end of the water production return pipe is connected with the water inlet end of the high-pressure pump.
Preferably, the water inlet end of the high-pressure pump is provided with a low-pressure switch.
Preferably, the water inlet pipeline, the intersegmental pipeline, the concentrated water pipeline and the water production pipe are all provided with a local pressure gauge and a pressure transmitter.
Preferably, the concentrated water pipeline and the water production pipe are both provided with flow meters for monitoring the water yield of the device; the water production pipe is provided with a conductivity meter for monitoring the conductivity of the produced water.
In the utility model, the filtering precision of the cartridge filter is 5 μm, and a PP material folding filter element is arranged in the cartridge filter, so that possible particles are prevented from entering a first section of membrane shell to damage a reverse osmosis membrane; the water outlet end of the cartridge filter is connected with the water inlet end of the high-pressure pump for pressurization so as to provide pressure for membrane desalination. The design of lower desalination rate in the second section of membrane shell can make full use of the concentrated water excess pressure of the first section of membrane shell to produce water and realize the target recovery rate of the system. And the water produced at the water producing and water outlet end of the second section of membrane shell finally flows back to the water inlet end of the high-pressure pump, and the concentrated water outlet end of the second section of membrane shell is connected with a concentrated water pipeline.
In the utility model, different anti-pollution membrane designs are adopted for two sections of reverse osmosis: the common membrane is adopted in the first section of membrane shell, and the membrane element with low desalination rate of the trapezoidal grid flow channel is arranged in the second section of membrane shell, and the desalination rate is as low as 99.2%.
During operation, the residual pressure in the first section of membrane shell is beneficial to realizing water production in the second section of membrane shell, so that an intersegmental booster pump is omitted; wherein, the water outlet end of the second section membrane shell is connected with the water inlet end of the water return pipe and returns to the water inlet end of the reverse osmosis (first section membrane shell) to dilute the concentration of the inlet organic matter, thereby achieving the effects of reducing membrane fouling and prolonging the cleaning period and ensuring the stable operation of the reverse osmosis.
The utility model has reasonable structure, high efficiency, energy saving, consumption reduction, strong anti-fouling and anti-blocking capacity and stable operation. The integral design of the equipment saves an intersegment booster pump, and can effectively reduce the operation energy consumption. The aperture of a membrane element in the second section of membrane shell is looser than that of a reverse osmosis membrane of the first section of membrane shell, and the produced water dilutes the concentration of inlet water organic matters, so that the membrane fouling and blocking rate can be effectively reduced. The membrane chemical cleaning period can be prolonged, and continuous and stable operation is guaranteed.
Drawings
FIG. 1 is a schematic diagram of a high-salinity wastewater low-energy reverse osmosis device provided by the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in figure 1, the low-energy-consumption reverse osmosis device for high-salinity wastewater provided by the utility model comprises a cartridge filter 1, a high-pressure pump 2, a water inlet pipeline 3, a first section of membrane shell 4, an inter-section pipeline 5, a second section of membrane shell 6, a water production pipe 7, a concentrated water pipeline 8 and a control box;
a control system is arranged in the control box and is in control connection with the high-pressure pump 2;
the filtering precision of the cartridge filter 1 is 5 micrometers, and a 40-inch PP material folding filter element is arranged in the cartridge filter;
the water outlet end of the cartridge filter 1 is connected with the water inlet end of the high-pressure pump 2; the water outlet end of the high-pressure pump 2 is connected with the water inlet end of the water inlet pipeline 3;
a plurality of first section membrane shells 4 are arranged, and the water inlet ends of the plurality of first section membrane shells 4 are all connected with the water outlet end of the water inlet pipeline 3; the water producing and discharging ends of the first section of membrane shell 4 are connected with a water producing pipe 7, and the concentrated water discharging ends of the first section of membrane shell 4 are connected with the water inlet end of the intersegmental pipeline 5; a reverse osmosis membrane is arranged in the first section of membrane shell 4;
the water outlet end of the intersegment pipeline 5 is connected with the water inlet end of the second section of membrane shell 6;
the concentrated water outlet end of the second section of membrane shell 6 is connected with a concentrated water pipeline 8;
wherein, the second section of membrane shell 6 is provided with membrane elements with low desalination rate of the trapezoidal grid flow channel, and the desalination rate is as low as 99.2%.
In an alternative embodiment, a product water return line 9 is included; the water outlet end of the second section of the membrane shell 6 is connected with the water inlet end of the water production return pipe 9; the water outlet end of the water production return pipe 9 is connected with the water inlet end of the high-pressure pump 2.
In the utility model, the filtration precision of the cartridge filter 1 is 5 μm, and a 40-inch PP material folding filter element is arranged in the cartridge filter, so that possible particles are prevented from entering the first section of membrane shell 4 to damage a reverse osmosis membrane; the water outlet end of the cartridge filter 1 is connected with the water inlet end of the high-pressure pump 2 for pressurization so as to provide pressure for membrane desalination. The design of lower desalination rate in the second section of membrane shell 6 can make full use of the concentrated water excess pressure of the first section of membrane shell 4 to produce water and realize the target recovery rate of the system. The water produced at the water outlet end of the second section of membrane shell 6 finally flows back to the water inlet end of the high-pressure pump 2, and the concentrated water outlet end of the second section of membrane shell 6 is connected with a concentrated water pipeline 8.
In the utility model, different anti-pollution membrane designs are adopted for two sections of reverse osmosis: the common membrane is adopted in the first section of membrane shell 4, the membrane element with low desalination rate of the ladder grid flow channel is arranged in the second section of membrane shell 6, and the desalination rate is as low as 99.2% (the normal desalination rate is not less than 99.5%, and compared with the normal desalination rate, the membrane element with low desalination rate of the ladder grid flow channel is adopted).
During operation, the residual pressure in the first section of membrane shell 4 is beneficial to realizing water production in the second section of membrane shell 6, so that an intersegmental booster pump is omitted; wherein, the water outlet end of the second section membrane shell 6 is connected with the water inlet end of the water return pipe 9 and returns to the water inlet end of the reverse osmosis (the first section membrane shell 4) to dilute the concentration of the inlet organic matter, thereby achieving the effects of reducing membrane fouling and prolonging the cleaning period and ensuring the stable operation of the reverse osmosis.
In an alternative embodiment, the water inlet end of the high-pressure pump 2 is provided with a low-pressure switch; the frequency converter of the high-pressure pump 2 is slowly started and stopped to prevent water hammer; the water inlet end of the high-pressure pump 2 is provided with a low-voltage switch for low-voltage protection.
In an optional embodiment, the water inlet pipeline 3, the intersegment pipeline 5, the concentrated water pipeline 8 and the water production pipe 7 are all provided with an on-site pressure gauge and a pressure transmitter so as to test and detect a pressure value and ensure the work safety.
In an alternative embodiment, both the concentrate line 8 and the water production line 7 are provided with flow meters for monitoring the water production of the device; the water production pipe 7 is provided with a conductivity meter for monitoring the conductivity of the produced water so as to monitor in real time and ensure the safe operation of the equipment.
In conclusion, the utility model has the advantages of reasonable structure, high efficiency, energy saving, consumption reduction, strong anti-fouling and anti-blocking capacity and stable operation. The integral design of the equipment saves an intersegment booster pump, and can effectively reduce the operation energy consumption. The aperture of the membrane element in the second section of membrane shell 6 is looser than that of the reverse osmosis membrane in the first section of membrane shell 4, and the produced water dilutes the concentration of the organic matters in the inlet water, so that the membrane fouling and blocking rate can be effectively reduced. The membrane chemical cleaning period can be prolonged, and continuous and stable operation is guaranteed.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (5)
1. The high-salinity wastewater low-energy-consumption reverse osmosis device is characterized by comprising a security filter (1), a high-pressure pump (2), a water inlet pipeline (3), a first section of membrane shell (4), an inter-section pipeline (5), a second section of membrane shell (6), a water production pipe (7), a concentrated water pipeline (8) and a control box;
a control system is arranged in the control box and is in control connection with the high-pressure pump (2);
the filtering precision of the security filter (1) is 5 microns, and a 40-inch PP material folding filter element is arranged in the security filter;
the water outlet end of the cartridge filter (1) is connected with the water inlet end of the high-pressure pump (2); the water outlet end of the high-pressure pump (2) is connected with the water inlet end of the water inlet pipeline (3);
the first section of membrane shell (4) is provided with a plurality of first section of membrane shells, and the water inlet ends of the first section of membrane shell (4) are all connected with the water outlet end of the water inlet pipeline (3); the water-producing and water-discharging ends of the first section of membrane shell 4 are connected with a water-producing pipe (7), and the concentrated water-discharging ends of the first section of membrane shell 4 are connected with the water-feeding end of the intersegmental pipeline (5); a reverse osmosis membrane is arranged in the first section of membrane shell (4);
the water outlet end of the intersegment pipeline (5) is connected with the water inlet end of the second section of membrane shell (6);
the concentrated water outlet end of the second section of membrane shell (6) is connected with a concentrated water pipeline (8);
wherein, the second section of membrane shell (6) is internally provided with a membrane element with low desalination rate of the trapezoidal grid flow channel, and the desalination rate is as low as 99.2%.
2. The high salinity wastewater low energy consumption reverse osmosis unit of claim 1, characterized by comprising a product water return pipe (9);
the water outlet end of the produced water of the second section of membrane shell (6) is connected with the water inlet end of the produced water return pipe (9); the water outlet end of the water production return pipe (9) is connected with the water inlet end of the high-pressure pump (2).
3. The high-salinity wastewater low-energy-consumption reverse osmosis device according to claim 1, characterized in that a low-pressure switch is arranged at the water inlet end of the high-pressure pump (2).
4. The high-salinity wastewater low-energy-consumption reverse osmosis device according to claim 1, characterized in that the water inlet pipeline (3), the interstage pipeline (5), the concentrated water pipeline (8) and the water production pipe (7) are provided with an on-site pressure gauge and a pressure transmitter.
5. The high-salinity wastewater low-energy-consumption reverse osmosis device according to claim 1, characterized in that the concentrate pipeline (8) and the water production pipe (7) are provided with a flow meter for monitoring the water production of the device; the water production pipe (7) is provided with a conductivity meter for monitoring the conductivity of the produced water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122169047.9U CN215667258U (en) | 2021-09-08 | 2021-09-08 | High-salinity wastewater low-energy-consumption reverse osmosis device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122169047.9U CN215667258U (en) | 2021-09-08 | 2021-09-08 | High-salinity wastewater low-energy-consumption reverse osmosis device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215667258U true CN215667258U (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122169047.9U Expired - Fee Related CN215667258U (en) | 2021-09-08 | 2021-09-08 | High-salinity wastewater low-energy-consumption reverse osmosis device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215667258U (en) |
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2021
- 2021-09-08 CN CN202122169047.9U patent/CN215667258U/en not_active Expired - Fee Related
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Granted publication date: 20220128 |