CN219539950U - Reverse osmosis membrane system and pressure stabilizing device before membrane - Google Patents
Reverse osmosis membrane system and pressure stabilizing device before membrane Download PDFInfo
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- CN219539950U CN219539950U CN202320767899.4U CN202320767899U CN219539950U CN 219539950 U CN219539950 U CN 219539950U CN 202320767899 U CN202320767899 U CN 202320767899U CN 219539950 U CN219539950 U CN 219539950U
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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
The utility model provides a reverse osmosis membrane system and a pressure stabilizing device before membrane. The pressure stabilizing device before the membrane comprises a pressure stabilizing body, a water inlet, a pressure stabilizing exhaust valve and at least one membrane group connecting port, and the pressure stabilizing device before the membrane converts impact generated by partial pressure into potential energy in the pressure stabilizing device before the membrane when water inflow is started, releases the potential energy in the pressure stabilizing device before the membrane when water inflow is stopped, and reduces the negative influence of frequent start and stop on each component of a reverse osmosis membrane system. When the pre-membrane pressure stabilizing device is applied to a reverse osmosis membrane system, pressure fluctuation impact on all parts of the reverse osmosis membrane system can be effectively relieved, the risk of leakage caused by running of parts such as a pipeline connecting piece, a membrane shell connecting piece, a membrane group connecting head and the like is reduced, effective protection is provided for parts such as a membrane element, a driving device of a pump body and an impeller, irreversible damage is prevented from being caused, and the filtration performance of the membrane group is ensured.
Description
Technical Field
The utility model relates to the technical field of water treatment, in particular to a reverse osmosis membrane system and a pre-membrane pressure stabilizing device.
Background
When the RO (Reverse Osmosis) membrane system (hereinafter referred to as Reverse Osmosis membrane system) is used for zero discharge treatment of industrial wastewater, the wastewater reaching the standard is firstly gathered into a water inlet tank, and the wastewater is divided into two paths after passing through a water feeding pump, a pipeline mixer, a first automatic valve, a security filter and a high-pressure pump in sequence, wherein one path enters an industrial new water tank, and the other path enters a next-stage membrane system.
After the reverse osmosis membrane system runs for a period of time, the solid suspended matter is blocked to cause pressure difference to rise, physical cleaning is needed to restore the filtering performance of the membrane group, at the moment, the high-pressure pump and the water supply pump of the reverse osmosis membrane system are sequentially stopped, the first automatic valve is closed, the second automatic valve is opened, and the flushing water pump is started to flush the reverse osmosis membrane system.
After the reverse osmosis membrane system runs for a longer time, substances which cannot be removed by physical cleaning such as hardness and organic matters are accumulated on the surface of the membrane, chemical cleaning is needed to recover the filtering performance of the membrane group, at the moment, the first automatic valve and the second automatic valve are all closed, and the chemical cleaning water pump and the corresponding manual valve of the pipeline are manually opened to chemically clean the whole membrane device until the membrane system recovers the performance.
The reverse osmosis membrane system of the prior art has the following problems when performing physical cleaning or chemical cleaning:
1. because of the characteristic of industrial water quality, the membrane group needs to be washed once every two to three hours by a washing water pump, and parts such as a pipeline connecting piece, a membrane shell connecting piece and the like are continuously impacted by pressure fluctuation due to frequent start and stop, so that the leakage of the membrane group is very easy to occur, and the leakage condition of a membrane group connector pollutes the factory environment;
2. the instantaneous large fluctuation of pressure can also cause irreversible damage to the membrane element, and the operating cost is increased due to higher value of the membrane element in the reverse osmosis membrane system, so that the production cost and the wastewater treatment cost are increased;
3. frequent fluctuation of pressure can also cause irreversible damage to a driving device, an impeller and the like of the pump body, seriously affect the filtering performance, and further increase the production cost and the wastewater treatment cost.
Disclosure of Invention
The utility model aims to provide a reverse osmosis membrane system and a pre-membrane pressure stabilizing device, which are used for reducing the negative influence of frequent start-stop on each component of the reverse osmosis membrane system.
In order to solve the technical problems, the utility model provides a pre-membrane pressure stabilizing device, which comprises a pressure stabilizing body, a water inlet, a pressure stabilizing exhaust valve and at least one membrane group connecting port, wherein the pressure stabilizing body is provided with a containing cavity, the water inlet is arranged at one side of the pressure stabilizing body, the pressure stabilizing exhaust valve is arranged above the pressure stabilizing body, the membrane group connecting port is arranged below the pressure stabilizing body, and
when liquid flows into the water inlet, the pressure-stabilizing exhaust valve exhausts, the liquid in the pressure-stabilizing body exceeds the height of the water inlet and flows out through the membrane group connecting port until the pressure-stabilizing body is filled with the liquid,
when no liquid flows into the water inlet, the pressure stabilizing exhaust valve is used for air intake, and the liquid in the pressure stabilizing body continuously flows out through the membrane group connecting port until the liquid in the pressure stabilizing body descends to the height of the water inlet.
Optionally, the device further comprises a front membrane distributor, and the at least one membrane group connection port is communicated with the pressure stabilizing body through the front membrane distributor.
The utility model also provides a reverse osmosis membrane system with the pre-membrane pressure stabilizing device, which comprises a water supply module, a pressurizing module and a membrane group module which are sequentially connected in series, wherein the pre-membrane pressure stabilizing device is arranged at the input end of the pressurizing module.
Optionally, the system further comprises a physical flushing module, wherein the physical flushing module is connected with the water supply module in parallel and then connected with the pressurizing module in series.
Optionally, the physical flushing module comprises a flushing pump and a second valve which are sequentially connected in series.
Optionally, the water supply module comprises a water inlet tank, a water supply pump, a pipeline mixer and a first valve which are sequentially connected in series, wherein liquid in the water inlet tank is mixed with the cleaning agent in the pipeline mixer.
Optionally, the pressurizing module comprises a cartridge filter and a high-pressure pump which are sequentially connected in series.
Optionally, the membrane group module includes one-level membrane group and second grade membrane group, voltage regulator device before the membrane set up in the input of one-level membrane group, first output of one-level membrane group with behind the first output intercommunication of second grade membrane group, through the first output of membrane group module is connected to industry new water pond, the second output of one-level membrane group is connected to the input of second grade membrane group.
Optionally, the second output end of the second-stage membrane group is connected to the concentrate adjusting tank through the second output end of the membrane group module, and the third output end of the second-stage membrane group is connected to the water supply module through the third output end of the membrane group module.
Optionally, the membrane group module further comprises a membrane post-breaking siphon valve, and the first output end of the primary membrane group is connected to the membrane post-breaking siphon valve after being communicated with the first output end of the secondary membrane group.
Optionally, the chemical cleaning device further comprises a chemical cleaning module, wherein the chemical cleaning module comprises at least one chemical cleaning box and a pit, the chemical cleaning box is respectively connected to all input ends and output ends of the primary membrane group and the secondary membrane group, and the pit is arranged at the output ends of the primary membrane group and the secondary membrane group.
Optionally, the chemical cleaning tank includes a pickling tank and/or an alkaline cleaning tank.
According to the pre-membrane pressure stabilizing device, when the reverse osmosis membrane system starts water inflow, impact generated by partial pressure is converted into potential energy in the pre-membrane pressure stabilizing device, and when the reverse osmosis membrane system stops water inflow, the potential energy in the pre-membrane pressure stabilizing device is released, so that the negative influence of frequent start and stop on each component of the reverse osmosis membrane system is reduced.
When the pre-membrane pressure stabilizing device provided by the utility model is applied to a reverse osmosis membrane system, the pressure fluctuation impact on all parts of the reverse osmosis membrane system can be effectively relieved, the risk of leakage caused by running and leaking of parts such as pipeline connectors, membrane shell connectors and the like is reduced, the leakage of a membrane group connector is prevented, and the pollution to the factory environment is avoided; the method provides effective protection for the membrane element, prevents the membrane element from being irreversibly damaged due to pressure impact, effectively controls the operation cost, and reduces the system maintenance cost and the wastewater treatment cost; the device provides effective protection for components such as a driving device and an impeller of the pump body, prevents the components from being irreversibly damaged, ensures the filtration performance of the membrane group, and further reduces the system maintenance cost and the wastewater treatment cost.
Drawings
FIG. 1 is a schematic diagram of a pre-membrane voltage regulator in an embodiment of the utility model;
FIG. 2 is a schematic diagram of a pre-film pressure stabilizing device in a production ready state and a pump-down standby state according to an embodiment of the present utility model;
FIG. 3 is a schematic structural diagram of a pre-film voltage regulator in a normal production state according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a reverse osmosis membrane system in an embodiment of the utility model;
fig. 5 is a schematic structural diagram of a water inlet module of a reverse osmosis membrane system according to an embodiment of the present utility model.
Wherein, the reference numerals are as follows:
1-a pre-membrane pressure stabilizing device; 11-a voltage regulator; 12-water inlet; 13-a pressure stabilizing exhaust valve; 14-membrane group connection port; 15-a pre-film dispenser;
2-a water supply module; 21-a water inlet pool; 22-a feed pump; 23-pipe mixer; 24-a first valve;
3-a boost module; 31-a cartridge filter; 32-high pressure pump;
4-a membrane group module; 41-a first-order membrane group; 42-a secondary membrane group; a first output of the 43-membrane stack module; 44-a second output of the membrane group module; a third output of the 45-membrane module; 46-membrane post-break siphon valve;
5-physical flushing module; 51-a flushing pump; 52-a second valve;
6-a chemical cleaning module; 61-a chemical cleaning tank; 62-pit.
Detailed Description
The reverse osmosis membrane system and the pre-membrane pressure stabilizing device provided by the utility model are further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present utility model will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.
As used in this disclosure, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this disclosure, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. As used in this disclosure, the term "plurality" is generally employed in its sense including "at least one" unless the content clearly dictates otherwise. As used in this disclosure, the term "at least two" is generally employed in its sense including "two or more", unless the content clearly dictates otherwise. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", "a third" may include one or at least two such features, either explicitly or implicitly.
As described in the background art, the reverse osmosis membrane system in the prior art has the following problems: because of the characteristic of industrial water quality, the membrane group needs to be washed once every two to three hours by a washing water pump, and parts such as a pipeline connecting piece, a membrane shell connecting piece and the like are continuously impacted by pressure fluctuation due to frequent start and stop, so that the leakage of the membrane group is very easy to occur, and the leakage condition of a membrane group connector pollutes the factory environment; the instantaneous large fluctuation of pressure can also cause irreversible damage to the membrane element, and the operating cost is increased due to higher value of the membrane element in the reverse osmosis membrane system, so that the production cost and the wastewater treatment cost are increased; frequent fluctuation of pressure can also cause irreversible damage to a driving device, an impeller and the like of the pump body, seriously affect the filtering performance, and further increase the production cost and the wastewater treatment cost.
Based on the above, the utility model provides a reverse osmosis membrane system and a pre-membrane pressure stabilizing device, which convert the impact generated by partial pressure into potential energy in the pre-membrane pressure stabilizing device when the reverse osmosis membrane system starts water inflow, and release the potential energy in the pre-membrane pressure stabilizing device when the reverse osmosis membrane system stops water inflow, so that the negative influence of frequent start and stop on each component of the reverse osmosis membrane system is reduced.
The following describes the pre-membrane pressure stabilizing device of the present utility model in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a pre-membrane pressure stabilizing device 1 in an embodiment of the present utility model, as shown in fig. 1, the pre-membrane pressure stabilizing device 1 includes a pressure stabilizing body 11, a water inlet 12, a pressure stabilizing exhaust valve 13, and at least one membrane group connection port 14, wherein the pressure stabilizing body 11 has a receiving cavity, the water inlet 12 is disposed at one side of the pressure stabilizing body 11, the pressure stabilizing exhaust valve 13 is disposed above the pressure stabilizing body 11, and the membrane group connection port 14 is disposed below the pressure stabilizing body 11.
When the liquid flows into the water inlet 12, the pressure-stabilizing exhaust valve 13 exhausts, and the liquid in the pressure-stabilizing body 11 exceeds the height of the water inlet 12 and flows out through the membrane group connection port 14 until the pressure-stabilizing body 11 is full of the liquid, as shown in fig. 3.
When no liquid flows into the water inlet 12, the pressure stabilizing exhaust valve 13 is in air intake, and the liquid in the pressure stabilizing body 11 continues to flow out through the membrane group connection port 14 until the liquid in the pressure stabilizing body 11 descends to the height of the water inlet 12, as shown in fig. 2.
Specifically, the pressure stabilizer 11 may be a cylindrical tank-shaped container, or may be another container having a certain height, and may have a certain sealing performance except for the water inlet 12, the pressure-stabilizing exhaust valve 13, and the membrane group connection port 14; meanwhile, it is required to ensure that the pressure-stabilizing exhaust valve 13 is significantly higher than the water inlet 12, and the height of the membrane group connection port 14 is significantly lower than the water inlet 12.
Specifically, the pressure-stabilizing exhaust valve 13 may be a check valve, which may realize incomplete sealing, and in the case that no water pump provides water, siphon occurs in the pressure-stabilizing body 11, so as to ensure that the liquid level reaches the position of the water inlet 12 before the actual production starts or when the pump stops, as shown in fig. 2.
Further, as shown in fig. 1 to 3, the pre-membrane pressure stabilizing device 1 further includes a pre-membrane dispenser, and the at least one membrane group connection port 14 communicates with the pressure stabilizing body 11 through the pre-membrane dispenser. Since the membrane module 4 is composed of a large number of membrane elements, the pre-membrane distributor can better distribute and guide the wastewater into each membrane element, the shape of the pre-membrane distributor and the number of the membrane module connection ports 14 are determined by the arrangement mode of the membrane module 4, the schematic diagram of the utility model only shows the shape of a straight pipe, and the shape of the pre-membrane distributor can be changed according to actual needs by a person skilled in the art.
The application of the pre-membrane pressure stabilizing apparatus 1 described above to a reverse osmosis membrane system will be described in detail below with reference to the accompanying drawings.
Fig. 4 is a schematic structural diagram of a reverse osmosis membrane system in an embodiment of the present utility model, as shown in fig. 4, the reverse osmosis membrane system with a pre-membrane pressure stabilizing device 1 includes a water supply module 2, a pressurizing module 3 and a membrane group module 4 that are sequentially connected in series, where the pre-membrane pressure stabilizing device 1 is disposed at an input end of the pressurizing module 3.
Further, after the reverse osmosis membrane system is operated for a period of time, the pressure difference is increased due to the blockage of the solid suspended matters, and physical cleaning is required to recover the filtering performance of the membrane module, so the reverse osmosis membrane system further comprises a physical flushing module 5, and the physical flushing module 5 is connected in series with the pressurizing module 3 after being connected in parallel with the water supply module 2.
In a preferred embodiment, the physical flushing module 5 comprises a flushing pump 51 and a second valve 52 in series. In particular, a reducing joint and/or a flow meter may be additionally connected in series between the flushing pump 51 and the second valve 52 to detect the flow through the physical flushing module 5.
Further, as shown in fig. 5, the water supply module 2 includes a water intake tank 21, a water supply pump 22, a pipe mixer 23, and a first valve 24, which are sequentially connected in series, and the liquid of the water intake tank 21 is mixed with the cleaning agent in the pipe mixer 23.
In particular, the cleaning agents may be, but are not limited to, non-oxidizing bactericides and/or scale inhibitors; a flowmeter may be additionally provided between the water intake pool 21 and the water feed pump 22; the water feed pump 22 may be a single component or a set of water pump unit, the water pump unit may include a water pump, a reducing interface, a pressure gauge and a one-way valve which are connected in series, both ends of the water pump unit may be connected in series with the flow meter, and the water feed pump 22 may also be formed by connecting two sets of water pump units in parallel, as shown in fig. 5; furthermore, a reducing joint and/or a flow meter may additionally be connected in series between the feed pump 22 and the first valve 24 to detect the flow through the physical flushing module 5.
In a specific embodiment, the pressurizing module 3 includes a cartridge filter 31 and a high pressure pump 32 connected in series. Specifically, a differential pressure gauge may be connected in parallel to two ends of the cartridge filter 31 to detect the differential pressure between the two ends of the cartridge filter 31, the input end and the output end of the high-pressure pump 32 may be provided with variable diameter interfaces, a check valve may be disposed behind the high-pressure pump 32 to avoid backflow of waste water, and flow meters may be disposed behind the cartridge filter 31 and the high-pressure pump 32 to detect the flow rate passing through the corresponding components.
As shown in fig. 4, further, the membrane module 4 includes a primary membrane module 41 and a secondary membrane module 42, the pre-membrane voltage stabilizer 1 is disposed at an input end of the primary membrane module 41, and after a first output end of the primary membrane module 41 is communicated with a first output end of the secondary membrane module 42, the first output end 43 of the membrane module is connected to an industrial fresh water tank (not shown in the figure), and a second output end of the primary membrane module 41 is connected to an input end of the secondary membrane module 42.
In a specific embodiment, the membrane element can realize brine separation, and the purification effect of the reverse osmosis membrane system can be improved by arranging two-stage membrane groups, after the primary membrane group 41 filters once, the purified water passing through the primary membrane group 41 enters an industrial new water tank, the non-passing concentrated water enters the secondary membrane group 42, and the purified water passing through the secondary membrane group 42 and the purified water passing through the primary membrane group 41 are converged and then enter the industrial new water tank.
In addition, a flow meter may be additionally connected in series between the second output end of the primary membrane group 41 and the input end of the secondary membrane group 42 to detect the flow condition between the primary membrane group 41 and the secondary membrane group 42; a serial check valve, a regulating valve and/or a flowmeter can be additionally arranged at the tail end of the first output end 43 of the membrane group module, the check valve is used for preventing liquid in the industrial new water tank from flowing back, and the regulating valve and the flowmeter provide support for automatic control of the whole reverse osmosis membrane system; pressure gauges and/or thermometers may be further provided at the output ends of the primary and secondary membrane modules 41, 42 to monitor the pressure and/or temperature at the output ends of each membrane module.
In a preferred embodiment, the second output end of the second membrane module 42 is connected to a concentrate adjustment tank (not shown) through the second output end 44 of the membrane module, and the third output end of the second membrane module 42 is connected to the water feed module 2 through the third output end 45 of the membrane module. Specifically, the wastewater that does not pass through the second membrane module 42 forms strong brine, and the strong brine still needs to be treated by reverse osmosis, in practical application, as described in the above embodiment, a part of the wastewater enters the next membrane system, that is, the strong water adjusting tank for further treatment, and another part of the wastewater flows back to the water inlet tank 21 of the water supply module 2, and the water output of the second output 44 of the membrane module and the third output 45 of the membrane module is specifically adjusted according to the water quality parameters of the subsequent process.
In addition, a reducing interface, a one-way valve and/or a flowmeter can be connected in series at the end of the second output end 44 of the membrane module, the one-way valve is used for preventing the liquid in the concentrated water adjusting tank from flowing back, and the flowmeter is used for detecting the flow entering the concentrated water adjusting tank from the second output end 44 of the membrane module; a check valve and a flow meter may also be connected in series at the end of the third output 45 of the membrane group module.
In a preferred embodiment, the membrane module 4 further includes a post-membrane siphon valve 46, and the first output end of the primary membrane module 41 is connected to the post-membrane siphon valve 46 after being communicated with the first output end of the secondary membrane module 42. Because the membrane group is not suitable for water break, the siphon valve 46 can be opened at the negative pressure after the membrane is arranged, so that the water break of each membrane element is ensured.
Further, after the reverse osmosis membrane system is operated for a longer time, the membrane surface is accumulated with hardness, organic matters and other substances which cannot be removed by physical cleaning, and chemical cleaning is required to recover the filtration performance of the membrane module, so the reverse osmosis membrane system further comprises a chemical cleaning module 6, the chemical cleaning module 6 comprises at least one chemical cleaning tank 61 and a pit 62, the chemical cleaning tank 61 is respectively connected to all input ends and output ends of the primary membrane module 41 and the secondary membrane module 42, and the pit 62 is arranged at the output ends of the primary membrane module 41 and the secondary membrane module 42.
In a preferred embodiment, the chemical cleaning tank 61 comprises a pickling tank and/or an alkaline cleaning tank. Wherein, the pickling and cleaning tank is used for removing substances such as hardness, calcium-containing compounds and the like in the wastewater, and the alkaline washing and cleaning tank is used for dissolving grease organic matters in the wastewater. In addition, a flowmeter may be additionally connected in series before the chemical cleaning tank 61 is connected to the primary membrane group 41 and the secondary membrane group 42, so as to detect the flow rate output by the chemical cleaning tank 61; the pit 62 is the final destination of the chemically cleaned wastewater, and a valve and a burst disk can be additionally connected in series before entering the pit 62 to reduce environmental pollution.
Taking a specific embodiment as an example, in the production preparation state, the pressure stabilizing exhaust valve 13 is kept incompletely sealed before the first water inlet, waste water is injected into the pressure stabilizing body 11, and after the water inlet tank 21 is lower than the membrane module 4 and is kept stand for a period of time, the liquid level in the pressure stabilizing body 11 is siphoned to the height of the water inlet 12, as shown in fig. 2.
In a normal production state, the water feed pump 22 of the water feed module 2 is started, the wastewater sequentially passes through the pipeline mixer 23, the first valve 24, the cartridge filter 31 and the high-pressure pump 32 and then enters the pre-membrane pressure stabilizing device 1, the wastewater is pressurized in the pressure stabilizing device, and meanwhile, the pressure stabilizing exhaust valve 13 is used for exhausting, part of the rapid pressure of the reverse osmosis membrane system is converted into potential energy of the wastewater in the pressure stabilizing body 11, so that the reverse osmosis membrane system is stably and slowly boosted, then the high-pressure pump 32 is controlled to be slowly started in a frequency conversion mode, and finally the pressure stabilizing body 11 is filled with the wastewater, as shown in fig. 3.
In the standby state of stopping the pump, the high-pressure pump 32 and the water supply pump 22 are sequentially stopped, at this time, the pressure-stabilizing exhaust valve 13 is slowly inflated, potential energy accumulated in the wastewater in the pressure-stabilizing body 11 is released, and a certain amount of inflow water is continuously provided for the reverse osmosis membrane system, so that the reverse osmosis membrane system is stably and slowly depressurized, and finally the reverse osmosis membrane system returns to the state shown in fig. 2.
After the reverse osmosis membrane system runs for a period of time, the solid suspended matter is blocked to cause pressure difference to rise, physical cleaning is needed to restore the filtering performance of the membrane group, at the moment, the first valve 24 is closed, the reverse osmosis membrane system enters a standby state of stopping pumps, and the system slowly reduces pressure until the pressure stabilizing device 1 reaches the state shown in figure 2 before the membrane; then the second valve 52 is opened, the flushing pump 51 of the physical flushing module 5 starts to flush the whole reverse osmosis membrane system, the normal production state is entered, the pressure-stabilizing exhaust valve 13 is used for exhausting, the reverse osmosis membrane system is ensured to stably and slowly boost pressure until the pressure-stabilizing device 1 before the membrane reaches the state shown in figure 3; after the physical cleaning is completed, the system enters a standby state of stopping the pump once again, and then enters a production preparation state once again, which is not described herein.
After the reverse osmosis membrane system runs for a longer time, substances which cannot be removed by physical cleaning such as hardness, organic matters and the like are accumulated on the surface of the membrane, chemical cleaning is needed to recover the filtering performance of the membrane group, at the moment, the first automatic valve and the second automatic valve are all closed, the reverse osmosis membrane system enters a pump stopping standby state, and the system slowly reduces pressure until the pressure stabilizing device 1 before the membrane reaches the state shown in the figure 2; then manually opening a water pump of the chemical cleaning module 6 and a corresponding manual valve of a pipeline to chemically clean the whole reverse osmosis membrane system, entering a normal production state, exhausting the pressure-stabilizing exhaust valve 13, ensuring that the reverse osmosis membrane system is stably and slowly boosted, and enabling the pressure-stabilizing device 1 to reach a state shown in figure 3 before the reverse osmosis membrane system is restored to the performance; after the chemical cleaning is completed, the system enters a standby state of stopping the pump once again, and then enters a production preparation state once again, which is not described herein.
In summary, according to the pre-membrane pressure stabilizing device provided by the utility model, when the reverse osmosis membrane system starts water inflow, the impact generated by partial pressure is converted into the potential energy in the pre-membrane pressure stabilizing device, and when the reverse osmosis membrane system stops water inflow, the potential energy in the pre-membrane pressure stabilizing device is released, so that the negative influence of frequent start and stop on each component of the reverse osmosis membrane system is reduced.
Compared with the traditional reverse osmosis membrane system, when the pre-membrane voltage stabilizing device provided by the utility model is applied to the reverse osmosis membrane system, the pressure fluctuation impact on all parts of the reverse osmosis membrane system can be effectively relieved, the risk of running and leaking of parts such as a pipeline connecting piece, a membrane shell connecting piece and the like is reduced, the leakage of a membrane group connector is prevented, and the pollution to the factory environment is avoided; the method provides effective protection for the membrane element, prevents the membrane element from being irreversibly damaged due to pressure impact, effectively controls the operation cost, and reduces the system maintenance cost and the wastewater treatment cost; the device provides effective protection for components such as a driving device and an impeller of the pump body, prevents the components from being irreversibly damaged, ensures the filtration performance of the membrane group, and further reduces the system maintenance cost and the wastewater treatment cost.
The above description is only illustrative of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (10)
1. The pressure stabilizing device is characterized by comprising a pressure stabilizing body, a water inlet, a pressure stabilizing exhaust valve and at least one membrane group connecting port, wherein the pressure stabilizing body is provided with a containing cavity, the water inlet is arranged on one side of the pressure stabilizing body, the pressure stabilizing exhaust valve is arranged above the pressure stabilizing body, and the membrane group connecting port is arranged below the pressure stabilizing body; when liquid flows into the water inlet, the pressure-stabilizing exhaust valve exhausts, and the liquid in the pressure-stabilizing body exceeds the height of the water inlet and flows out through the membrane group connecting port until the pressure-stabilizing body is full of liquid; when no liquid flows into the water inlet, the pressure stabilizing exhaust valve is used for air intake, and the liquid in the pressure stabilizing body continuously flows out through the membrane group connecting port until the liquid in the pressure stabilizing body descends to the height of the water inlet.
2. The pre-membrane pressure regulator of claim 1, further comprising a pre-membrane dispenser, wherein the at least one membrane set connection port communicates with the pressure regulator through the pre-membrane dispenser.
3. A reverse osmosis membrane system having the pre-membrane pressure stabilizing device of claim 1, comprising a water supply module, a pressurizing module and a membrane group module connected in series in sequence, wherein the pre-membrane pressure stabilizing device is arranged at the input end of the pressurizing module.
4. The reverse osmosis membrane system of claim 3, further comprising a physical rinse module connected in parallel with the feedwater module and then in series with the pressurization module; the physical flushing module comprises a flushing pump and a second valve which are sequentially connected in series.
5. The reverse osmosis membrane system of claim 3, wherein the water feed module comprises a water inlet tank, a water feed pump, a pipe mixer, and a first valve in series, the liquid of the water inlet tank being mixed with the cleaning agent in the pipe mixer.
6. The reverse osmosis membrane system of claim 3, wherein the pressurization module comprises a cartridge filter and a high pressure pump in series.
7. The reverse osmosis membrane system of claim 3, wherein the membrane module comprises a primary membrane module and a secondary membrane module, the pre-membrane pressure stabilizing device is arranged at the input end of the primary membrane module, the first output end of the primary membrane module is communicated with the first output end of the secondary membrane module and then is connected to an industrial new water tank through the first output end of the membrane module, and the second output end of the primary membrane module is connected to the input end of the secondary membrane module; the second output end of the second-stage membrane group is connected to the concentrated water adjusting tank through the second output end of the membrane group module, and the third output end of the second-stage membrane group is connected to the water supply module through the third output end of the membrane group module.
8. The reverse osmosis membrane system of claim 7, wherein the membrane stack module further comprises a post-membrane siphon valve, the first output of the primary membrane stack being connected to the post-membrane siphon valve after communicating with the first output of the secondary membrane stack.
9. The reverse osmosis membrane system of claim 7, further comprising a chemical cleaning module comprising at least one chemical cleaning tank connected to all inputs and outputs of the primary and secondary membrane groups, respectively, and a pit disposed at the outputs of the primary and secondary membrane groups.
10. The reverse osmosis membrane system of claim 9, wherein the chemical wash tank comprises a pickling wash tank and/or an alkaline wash tank.
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| CN117138580A (en) * | 2023-10-31 | 2023-12-01 | 江苏拓邦环保科技有限公司 | Reverse osmosis membrane filter core structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117138580A (en) * | 2023-10-31 | 2023-12-01 | 江苏拓邦环保科技有限公司 | Reverse osmosis membrane filter core structure |
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