CN211111362U - Membrane separation concentrated water recycling device - Google Patents
Membrane separation concentrated water recycling device Download PDFInfo
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- CN211111362U CN211111362U CN201921623423.3U CN201921623423U CN211111362U CN 211111362 U CN211111362 U CN 211111362U CN 201921623423 U CN201921623423 U CN 201921623423U CN 211111362 U CN211111362 U CN 211111362U
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Abstract
The utility model discloses a membrane separation dense water cyclic utilization device. The utility model realizes zero discharge of the concentrated water recycling by a closed circulation method formed by one or more times of concentrated water recycling and treatment and a treatment system without concentrated water discharge at the last stage; the method comprises the following steps of (1) carrying out treatment by using a nanofiltration or reverse osmosis process, selecting a proper recovery rate, controlling the generation of concentrated water in a certain proportion, and carrying out multilayer nesting on system devices to gradually concentrate the concentrated water; the last stage of closed circulation is a device for closed circulation of a waterway at the last stage of the system, wherein concentrated water generated by the previous stage of reverse osmosis or nanofiltration is treated by applying a filtering type non-concentrated water discharge process, and all the concentrated water is recycled into a previous stage of water tank. Concentrated water is treated step by step, so that no concentrated water is discharged, and water resources are utilized to the maximum extent.
Description
Technical Field
The utility model relates to a pure water treatment technology, concretely relates to membrane separation dense water cyclic utilization device.
Background
The membrane separation technology has wide and deep application in the water treatment industry, particularly reverse osmosis and nanofiltration, and is widely developed and applied worldwide. The method for separating the solute and the solvent by using the reverse osmosis membrane separation technology based on the reverse osmosis principle has the advantages of no need of phase change in the separation of the solute and the water at normal temperature, low energy consumption, wide impurity removal range, high desalination rate, simple separation device, and easiness in operation, control and maintenance.
Nanofiltration membrane separation technology is also a method for separating solute and solvent by using the reverse osmosis principle. The interception characteristic of the nanofiltration membrane is between that of ultrafiltration and reverse osmosis, and the nanofiltration membrane has high removal rate on small molecular organic matters dissolved in water and certain removal rate on ions in an aqueous solution.
When the reverse osmosis technology is applied to treating water resources, the concentration polarization of the concentrated water side of the reverse osmosis membrane element enables the recovery rate not to be very high, namely the percentage of the inlet water converted into the produced water is limited to a certain degree, and the concentrated water with a certain proportion must be discharged, so that the indissolvable salts do not exceed the saturation limit, scaling is prevented, the normal use and the maintenance life of the reverse osmosis membrane are ensured, and a large amount of water resource waste is inevitably caused continuously. Most common is reverse osmosis pure water preparation facilities, and its technological advantage is obvious, but its shortcoming is just mainly that the water recovery is low, especially the concentrated water direct discharge of one-level reverse osmosis has caused very big resource waste, and is especially obvious at the present that the water resource is scarce.
The water source is mostly municipal tap water, the tap water contains suspended matters and soluble matters with certain concentration, the suspended matters mainly comprise inorganic particles such as silt, rust and the like, colloids, microorganisms, algae and other biological particles, and the soluble matters mainly comprise easily soluble salt (such as chloride, carbonate, sulfate and silicate) metal oxides, acid and alkali and the like. In the water making process, the substances can be enriched on the concentrated water side, and if the recovery rate is high, the reverse osmosis membrane pollution (microbial pollution, chemical pollution, particle pollution and colloid pollution) in different forms can be easily caused. Tap water is used as inlet water, pure water is prepared by a reverse osmosis technology, and a large amount of concentrated water is inevitably discharged.
Disclosure of Invention
In order to reduce the waste of water resource, improve water processing system's rate of recovery, the utility model provides a dense water cyclic utilization device of membrane separation.
The utility model discloses a membrane separation dense water cyclic utilization device adopts dense water discharge processing system or dense water discharge processing system many times.
Adopt concentrated water discharge processing system once, the utility model discloses a membrane separation concentrated water cyclic utilization device includes: a concentrated water discharge treatment system and a closed cycle treatment system; the concentrated water discharge treatment system comprises a concentrated water discharge treatment tank, a pretreatment unit and a concentrated water membrane separation treatment device which are sequentially connected by pipelines; the closed-cycle treatment system comprises a closed-cycle treatment concentrated water tank and a filtering treatment system which are connected through a pipeline; the concentrated water membrane separation treatment device is connected to a closed-cycle treatment concentrated water tank through a pipeline, and the filtering treatment system is connected to a concentrated water discharge treatment concentrated water tank through a pipeline to form closed cycle; the reverse osmosis unit of the pure water preparation device is connected to a concentrated water discharge treatment concentrated water tank through a pipeline; the concentrated water membrane separation treatment device is connected to a raw water tank of the pure water preparation device through a pipeline.
The concentrated water produced by the reverse osmosis unit of the pure water preparation device flows into a concentrated water discharge treatment concentrated water tank through a valve to be stored, is conveyed to a pretreatment unit through a water pump to be pretreated, then enters a concentrated water film separation treatment device to be subjected to membrane separation treatment by using a reverse osmosis technology, the produced water enters a raw water tank of the pure water preparation device, and the produced concentrated water enters a closed circulation treatment concentrated water tank; the concentrated water in the closed circulation concentrated water treatment tank is controlled by a water pump, enters a filtering type treatment system for filtering, and the produced water enters the concentrated water discharge concentrated water treatment tank to complete the closed circulation of the water channel.
The pretreatment unit adopts a filtration process for pretreatment, and the pretreatment unit adopts a material for filtration, and is one or more of polyester fiber PP cotton, granular activated carbon and sintered activated carbon.
The concentrated water membrane separation treatment device is a nanofiltration treatment device or a reverse osmosis treatment device. The nanofiltration treatment device comprises a high-pressure pump and a plurality of nanofiltration membrane systems, wherein the nanofiltration membrane systems are arranged and combined and connected through the high-pressure pump, and the nanofiltration membrane systems adopt the arrangement of a nanofiltration membrane single-element system, a multi-element parallel single-stage system or a multi-stage system. The reverse osmosis treatment device comprises a high-pressure pump and a plurality of reverse osmosis membrane systems, wherein the reverse osmosis membrane systems are arranged and combined and connected through the high-pressure pump, and the reverse osmosis membrane systems adopt reverse osmosis membrane single elements and multi-element parallel single-stage systems or multi-stage system arrangement. The concentrated water membrane separation treatment device controls the water inlet pressure of the membrane through the high-pressure pump, controls the osmotic pressure of the concentrated water side, so that the produced water and the concentrated water are separated, and the produced water and the concentrated water respectively flow into respective pipelines. The pressure is controlled by a high-pressure pump and the flow is controlled by a flow meter, the proportion of the concentrated water is controlled, and therefore the recovery rate of the concentrated water is determined. The proportion of the concentrated water is 50-70%.
The filtering type treatment system adopts a heating circulator and a filtering material, the heating circulator comprises an annular pipeline and a heating device, and the heating device is arranged in a through hole in the annular pipeline; concentrated water after being concentrated step by step passes through an annular pipeline of a heating circulator, and is heated to promote the concentrated water after being concentrated step by step to be quickly scaled, so that the filtering effect is improved; then passing through a filter material; the filtering material adopts one or more of molecular sieve, ceramic filter element, sintered active carbon and ultrafiltration.
A valve is arranged on a pipeline between a reverse osmosis unit of the pure water preparation device and the concentrated water discharge treatment concentrated water tank, and the flow rate of the concentrated water flowing into the concentrated water discharge treatment concentrated water tank is controlled by the valve.
The pipeline between the concentrated water discharge treatment concentrated water tank and the pretreatment unit is provided with a water pump, a pressure gauge and a valve, concentrated water is conveyed to the pretreatment unit through the water pump, the pressure of the pipeline is monitored through the pressure gauge, and a water path is controlled to be opened and closed through the valve.
The pipeline between the pretreatment unit and the concentrated water membrane separation treatment device is provided with a high-pressure pump, a pressure gauge, a valve and a sampling valve, and a water sample in the pretreatment unit is extracted through the sampling valve to check the treatment effect.
And a conductivity meter and a flow meter are arranged on a pipeline between the concentrated water membrane separation treatment device and the raw water tank of the pure water preparation device, and the conductivity and the flow are respectively monitored.
And a pressure gauge is arranged on a pipeline between the concentrated water membrane separation treatment device and the closed circulation treatment concentrated water tank.
And a water pump and a pressure gauge are arranged on a pipeline between the closed-cycle concentrated treatment water tank and the filtering treatment system.
And a pressure gauge, a valve, a sampling valve, a conductivity meter and a flowmeter are arranged on a pipeline between the filtering treatment system and the concentrated water discharge treatment concentrated water tank.
Adopt concentrated water discharge processing system many times, the utility model discloses a membrane separation concentrated water cyclic utilization device includes: n times of concentrated water discharge treatment system and closed cycle treatment system, wherein N is more than or equal to 2; the ith concentrated water discharge treatment system comprises an ith concentrated water tank, an ith pretreatment unit and an ith concentrated water membrane separation treatment device which are sequentially connected by pipelines, wherein i is 1, … and N; the closed-cycle treatment system comprises a closed-cycle treatment concentrated water tank and a filtering treatment system which are connected through a pipeline; on the Nth concentrated water discharge treatment system, the Nth concentrated water membrane separation treatment device is connected to a closed circulation treatment concentrated water tank through a pipeline, and the filtration treatment system is connected to the Nth concentrated water tank through a pipeline to form closed circulation; the reverse osmosis unit of the pure water preparation device is connected to the first concentrated water tank through a pipeline; the first concentrated water membrane separation treatment device is connected to a raw water tank of the pure water preparation device through a pipeline, and the first concentrated water membrane separation treatment device is connected to a second concentrated water tank through a pipeline; the ith concentrated water membrane separation treatment device is connected to an ith-1 concentrated water tank through a pipeline, and the ith concentrated water membrane separation treatment device is connected to an ith +1 concentrated water tank through a pipeline, wherein i is 2, … N-1; the Nth concentrated water membrane separation treatment device is connected to the Nth-1 th concentrated water tank through a pipeline.
Concentrated water produced by a reverse osmosis unit of the pure water preparation device flows into a first concentrated water tank for storage, the concentrated water is conveyed to a first pretreatment unit through a water pump and enters a first concentrated water membrane separation treatment device after pretreatment, produced water enters a raw water tank of the pure water preparation device after membrane separation treatment by using a reverse osmosis technology, the produced concentrated water enters a second concentrated water tank and then enters a second pretreatment unit, the pretreated water enters a second concentrated water membrane separation treatment device, membrane separation treatment is performed by using the reverse osmosis technology, the produced water enters the first concentrated water tank to complete first circulation, and the produced concentrated water enters a third concentrated water tank; sequentially circulating, wherein concentrated water flows into an ith concentrated water tank, then enters an ith pretreatment unit, enters an ith concentrated water membrane separation treatment device after being pretreated, enters an (i-1) th concentrated water tank after being subjected to membrane separation treatment by using a reverse osmosis technology, enters an (i +1) th concentrated water tank, then enters an (i +1) th pretreatment unit, enters an (i +1) th concentrated water membrane separation treatment device after being pretreated, enters an ith concentrated water tank after being subjected to membrane separation treatment by using a reverse osmosis technology, and then enters the ith concentrated water tank to finish ith circulation, wherein i is 2, … and i-1; and sequentially circulating, wherein the Nth-1. sup. st concentrated water membrane separation treatment device performs membrane separation treatment by using a reverse osmosis technology, the generated concentrated water enters an Nth concentrated water tank, then enters an Nth pretreatment unit, enters the Nth concentrated water membrane separation treatment device after pretreatment, performs membrane separation treatment by using the reverse osmosis technology, enters a closed circulation treatment concentrated water tank, the concentrated water after step-by-step concentration enters a filtration type treatment system for filtration, and the produced water enters the Nth concentrated water tank to complete closed circulation of a water channel.
A valve is arranged on a pipeline between a reverse osmosis unit of the pure water preparation device and the first concentrated water tank, and the flow rate of the concentrated water flowing into the concentrated water discharge treatment concentrated water tank is controlled by the valve.
The pipeline between the ith concentrated water tank and the ith pretreatment unit is provided with a water pump, a pressure gauge and a valve, concentrated water is conveyed to the pretreatment unit through the water pump, the pressure of the pipeline is monitored through the pressure gauge, and a water path switch is controlled through the valve, wherein i is 1, ….
The pipeline between the ith pretreatment unit and the ith concentrated water membrane separation treatment device is provided with a high-pressure pump, a pressure gauge, a valve and a sampling valve, and a water sample in the pretreatment unit is extracted through the sampling valve to check the treatment effect.
And a conductivity meter and a flow meter are arranged on a pipeline between the first concentrated water membrane separation treatment device and the raw water tank of the pure water preparation device, and the conductivity and the flow are respectively monitored.
And a conductivity meter and a flow meter are arranged on a pipeline between the ith concentrated water membrane separation treatment device and the ith-1 concentrated water tank, and are used for monitoring the conductivity and the flow respectively.
And a pressure gauge is arranged on a pipeline between the Nth concentrated water membrane separation treatment device and the closed-cycle treatment concentrated water tank.
And a water pump and a pressure gauge are arranged on a pipeline between the closed-cycle concentrated treatment water tank and the filtering treatment system.
And a pressure gauge, a valve, a sampling valve, a conductivity meter and a flow meter are arranged on a pipeline between the filtering treatment system and the Nth concentrated water tank.
The utility model has the advantages that:
the utility model realizes zero discharge of the concentrated water recycling by a closed circulation method formed by one or more times of concentrated water recycling and treatment and a treatment system without concentrated water discharge at the last stage; the method comprises the following steps of (1) carrying out treatment by using a nanofiltration or reverse osmosis process, selecting a proper recovery rate, controlling the generation of concentrated water in a certain proportion, and carrying out multilayer nesting on system devices to gradually concentrate the concentrated water; the last stage of closed circulation is a device for closed circulation of a waterway at the last stage of the system, wherein concentrated water generated by the previous stage of reverse osmosis or nanofiltration is treated by applying a filtering type non-concentrated water discharge process, and all the concentrated water is recycled into a previous stage of water tank. Concentrated water is treated step by step, so that no concentrated water is discharged, and water resources are utilized to the maximum extent.
Drawings
Fig. 1 is a flow chart of an embodiment of the membrane separation concentrated water recycling device of the present invention.
Detailed Description
The invention will be further elucidated by means of specific embodiments in the following with reference to the drawings.
As shown in fig. 1, the membrane separation concentrated water recycling device of the embodiment adopts three multi-time concentrated water discharge treatment systems, the concentrated water membrane separation treatment device adopts a nanofiltration device, and the membrane separation concentrated water recycling device of the embodiment includes: a tertiary concentrated water discharge treatment system and a closed cycle treatment system; the ith concentrated water discharge treatment system comprises an ith concentrated water tank, an ith pretreatment unit and an ith nanofiltration device which are sequentially connected by pipelines, wherein i is 1,2 and 3; the closed-cycle treatment system comprises a closed-cycle treatment concentrated water tank and a filtering treatment system which are connected through a pipeline; on the third concentrated water discharge treatment system, a third nanofiltration device is connected to a closed circulation treatment concentrated water tank through a pipeline, and a filtration treatment system is connected to an Nth concentrated water tank through a pipeline to form closed circulation; the reverse osmosis unit of the pure water preparation device is connected to the first concentrated water tank through a pipeline; the first nanofiltration device is connected to a raw water tank of the pure water preparation device through a pipeline; the method comprises the following steps that concentrated water produced by a reverse osmosis unit of a pure water preparation device flows into a first concentrated water tank, then enters a first pretreatment unit, enters a first nanofiltration device after pretreatment, enters a raw water tank of the pure water preparation device after nanofiltration treatment, enters a second concentrated water tank, then enters a second pretreatment unit, enters a second nanofiltration device after pretreatment, enters the first concentrated water tank after nanofiltration treatment, completes first circulation, and enters a third concentrated water tank; the concentrated water flows into a third concentrated water tank, then enters a third pretreatment unit, enters a third nanofiltration device after pretreatment, and enters a second concentrated water tank after nanofiltration treatment to finish a second cycle; and the generated concentrated water enters a third concentrated water tank, then enters a third pretreatment unit, enters a third nanofiltration device after pretreatment, is subjected to nanofiltration treatment, then enters a closed circulation treatment concentrated water tank, then enters a filtration type treatment system for filtration, and enters the third concentrated water tank to finish closed circulation of a water channel.
The pretreatment unit adopts a filtration process for pretreatment, and the pretreatment unit adopts a material for filtration, and is one or more of PP cotton, granular activated carbon and sintered activated carbon.
The nanofiltration treatment device comprises a high-pressure pump and a plurality of nanofiltration membrane systems, wherein the nanofiltration membrane systems are arranged and combined and are connected through the high-pressure pump, and the nanofiltration membrane systems adopt nanofiltration membrane single elements, multi-element parallel single-stage systems or multi-stage system arrangement.
A water pump, a pressure gauge and a valve are arranged on a pipeline between the ith concentrated water tank and the ith pretreatment unit; and a pipeline between the ith pretreatment unit and the ith nanofiltration treatment device is provided with a high-pressure pump, a pressure gauge, a pressure switch, a valve and a sampling valve, wherein i is 1,2 and 3. A pipeline between the ith nanofiltration treatment device and the i-1 concentrated water tank is provided with a conductivity meter and a flow meter, and the conductivity and the flow of produced water are respectively monitored, wherein i is 2 and 3; a pipeline between raw water tanks of the pure water preparation device of the first nanofiltration treatment device is provided with a conductivity meter and a flow meter, and the conductivity and the flow of produced water are respectively monitored.
The zero-emission treatment method of the membrane separation concentrated water recycling device in the embodiment adopts three circulations, and comprises the following steps:
1) the method comprises the following steps that (1) concentrated water produced by a reverse osmosis unit of a pure water preparation device flows into a first concentrated water tank through a valve to be stored and buffered, is conveyed to a first pretreatment unit through a water pump, enters a first nanofiltration device after being pretreated, and after nanofiltration treatment, produced water enters a raw water tank of the pure water preparation device, enters a second concentrated water tank, then enters a second pretreatment unit, enters a second nanofiltration device after being pretreated, and enters the first concentrated water tank after being subjected to nanofiltration treatment, so that first circulation is completed, and produced concentrated water enters a third concentrated water tank;
2) the concentrated water flows into a third concentrated water tank, then enters a third pretreatment unit, enters a third nanofiltration device after pretreatment, and enters a second concentrated water tank after nanofiltration treatment to finish a second cycle;
3) the generated concentrated water enters a third concentrated water tank, then enters a third pretreatment unit, enters a third nanofiltration device after pretreatment, is subjected to nanofiltration treatment, enters a closed-cycle treatment concentrated water tank, enters a filtration treatment system after step-by-step concentration, is filtered, and enters the third concentrated water tank to finish closed cycle of a waterway;
4) simultaneously, a flow meter, a sampling valve and a conductivity meter are arranged on a pipeline connected with the filtering treatment system and a pipeline connected with the concentrated water film separation treatment device; monitoring the flow through a flow meter, judging whether the service condition of the filtering material, the nanofiltration membrane or the reverse osmosis membrane is blocked, and if so, replacing the filtering material, the nanofiltration membrane or the reverse osmosis membrane; monitoring the conductivity of the produced water through a conductivity meter, deducing the treatment effect of the filtering material, the nanofiltration membrane or the reverse osmosis membrane, and if the treatment effect cannot meet the requirement, replacing the filtering material, the nanofiltration membrane or the reverse osmosis membrane; the water quality of the produced water is periodically sampled and tested through a sampling valve to check the treatment effect of the filtering material, the nanofiltration membrane or the reverse osmosis membrane, and if the water quality of the produced water does not reach the standard, the filtering material, the nanofiltration membrane or the reverse osmosis membrane is replaced;
5) and a high-pressure pump and a flow meter are arranged on a pipeline connected with the concentrated water membrane separation treatment device, the pressure is controlled by the high-pressure pump, the flow is controlled by the flow meter, and the proportion of the concentrated water is controlled, so that the recovery rate of the concentrated water is determined, and the proportion of the concentrated water is 50-70%.
Finally, it is noted that the disclosed embodiments are intended to aid in further understanding of the invention, but will be understood by those skilled in the art that: various substitutions and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the present invention should not be limited to the embodiments disclosed, and the scope of the present invention is defined by the appended claims.
Claims (10)
1. The utility model provides a membrane separation dense water cyclic utilization device which characterized in that adopts once dense water discharge processing system, membrane separation dense water cyclic utilization device includes: a concentrated water discharge treatment system and a closed cycle treatment system; the concentrated water discharge treatment system comprises a concentrated water discharge treatment tank, a pretreatment unit and a concentrated water membrane separation treatment device which are sequentially connected by pipelines; the closed-cycle treatment system comprises a closed-cycle treatment concentrated water tank and a filtering treatment system which are connected through a pipeline; the concentrated water membrane separation treatment device is connected to a closed-cycle treatment concentrated water tank through a pipeline, and the filtering treatment system is connected to a concentrated water discharge treatment concentrated water tank through a pipeline to form closed cycle; the reverse osmosis unit of the pure water preparation device is connected to a concentrated water discharge treatment concentrated water tank through a pipeline; the concentrated water membrane separation treatment device is connected to a raw water tank of the pure water preparation device through a pipeline.
2. The utility model provides a membrane separation dense water cyclic utilization device which characterized in that adopts concentrated water discharge treatment system many times, membrane separation dense water cyclic utilization device includes: n times of concentrated water discharge treatment system and closed cycle treatment system, wherein N is more than or equal to 2; the ith concentrated water discharge treatment system comprises an ith concentrated water tank, an ith pretreatment unit and an ith concentrated water membrane separation treatment device which are sequentially connected by pipelines, wherein i is 1, … and N; the closed-cycle treatment system comprises a closed-cycle treatment concentrated water tank and a filtering treatment system which are connected through a pipeline; on the Nth concentrated water discharge treatment system, the Nth concentrated water membrane separation treatment device is connected to a closed circulation treatment concentrated water tank through a pipeline, and the filtration treatment system is connected to the Nth concentrated water tank through a pipeline to form closed circulation; the reverse osmosis unit of the pure water preparation device is connected to the first concentrated water tank through a pipeline; the first concentrated water membrane separation treatment device is connected to a raw water tank of the pure water preparation device through a pipeline, and the first concentrated water membrane separation treatment device is connected to a second concentrated water tank through a pipeline; the ith concentrated water membrane separation treatment device is connected to an ith-1 concentrated water tank through a pipeline, and the ith concentrated water membrane separation treatment device is connected to an ith +1 concentrated water tank through a pipeline, wherein i is 2, … N-1; the Nth concentrated water membrane separation treatment device is connected to the Nth-1 th concentrated water tank through a pipeline.
3. The membrane separation concentrated water recycling device according to claim 1 or 2, wherein the pretreatment unit uses a filtering material, which is one or more of polyester fiber cotton, granular activated carbon and sintered activated carbon.
4. The membrane separation concentrated water recycling device according to claim 1 or 2, wherein the concentrated water membrane separation treatment device is a nanofiltration treatment device or a reverse osmosis treatment device; the nanofiltration treatment device comprises a high-pressure pump and a plurality of nanofiltration membrane systems, the nanofiltration membrane systems are arranged and combined and are connected through the high-pressure pump, and the nanofiltration membrane systems adopt the arrangement of nanofiltration membrane single-element, multi-element parallel single-stage systems or multi-stage systems; the reverse osmosis treatment device comprises a high-pressure pump and a plurality of reverse osmosis membrane systems, wherein the reverse osmosis membrane systems are arranged and combined and connected through the high-pressure pump, and the reverse osmosis membrane systems adopt reverse osmosis membrane single elements and multi-element parallel single-stage systems or multi-stage system arrangement.
5. The membrane separation concentrated water recycling device according to claim 1 or 2, wherein the filtering treatment system employs a heating circulator and a filtering material, the heating circulator comprises an annular pipeline and a heating device, and the heating device is arranged in a through hole in the annular pipeline; the concentrated water passes through the annular pipeline of the heating circulator and then passes through the filtering material.
6. The membrane separation concentrated water recycling device according to claim 1 or 2, wherein a valve is provided on a pipe between the reverse osmosis unit and the concentrated water tank of the pure water preparation device, and the flow rate of the concentrated water flowing into the concentrated water discharge treatment tank is controlled by the valve.
7. The membrane separation concentrated water recycling device according to claim 1 or 2, wherein a water pump, a pressure gauge and a valve are arranged on a pipeline between the concentrated water tank and the pretreatment unit, concentrated water is conveyed to the pretreatment unit through the water pump, the pressure of the pipeline is monitored through the pressure gauge, and a water path is controlled to be opened and closed through the valve.
8. The membrane separation concentrated water recycling device according to claim 1 or 2, wherein a high pressure pump, a pressure gauge, a valve and a sampling valve are arranged in a pipeline between the pretreatment unit and the concentrated water membrane separation treatment device, and a water sample in the pretreatment unit is extracted through the sampling valve to check the treatment effect.
9. The membrane separation concentrated water recycling device according to claim 1 or 2, wherein a conductivity meter and a flow meter are provided in a pipe between the concentrated water membrane separation treatment device and a raw water tank of the pure water preparation device, and monitoring of conductivity and flow rate is performed respectively.
10. The membrane separation concentrated water recycling device according to claim 1 or 2, wherein a water pump and a pressure gauge are arranged on a pipeline between the closed-cycle treatment concentrated water tank and the filtering treatment system.
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| CN110655214A (en) * | 2019-09-26 | 2020-01-07 | 北京大学 | Membrane separation concentrated water recycling device and treatment method for realizing zero emission |
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