CN218281289U - Reverse osmosis membrane self-cleaning detection device - Google Patents
Reverse osmosis membrane self-cleaning detection device Download PDFInfo
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- CN218281289U CN218281289U CN202222375405.6U CN202222375405U CN218281289U CN 218281289 U CN218281289 U CN 218281289U CN 202222375405 U CN202222375405 U CN 202222375405U CN 218281289 U CN218281289 U CN 218281289U
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- Y02A20/131—Reverse-osmosis
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Abstract
The utility model provides a reverse osmosis membrane automatic cleaning detection device, which comprises a reverse osmosis membrane component, wherein one end of the reverse osmosis membrane component is connected with a raw water storage device through a water inlet pipe, the other end of the reverse osmosis membrane component is connected with a pure water storage device through a pure water pipe, a pressure detection piece and a conductivity detection piece are arranged on the water inlet pipe and the pure water pipe, and the pressure detection piece and the conductivity detection piece are both electrically connected with a control module; the raw water storage device is connected with the alkali liquor storage device through an alkali liquor pipe, the raw water storage device is connected with the acid liquor storage device through an acid liquor pipe, the alkali liquor pipe and the acid liquor pipe are respectively provided with a valve and a dosing pump, the valve and the dosing pump are respectively electrically connected with the pH control device, and the pH control device is electrically connected with the control module. The utility model discloses can realize detecting the automatic switch-over of two kinds of modes with wasing reverse osmosis membrane, can effectively judge reverse osmosis membrane's cleaning performance automatically in the cleaning process to automatically, carry out a lot of to reverse osmosis membrane and detect and wash until reaching the technological requirement.
Description
Technical Field
The utility model belongs to the technical field of the membrane performance detects, especially, relate to a reverse osmosis membrane self-cleaning detection device.
Background
Reverse osmosis, also known as reverse osmosis, is a membrane separation operation that uses a pressure differential as a driving force to separate a solvent from a solution. The most central component in the reverse osmosis technology is a reverse osmosis membrane (RO membrane), which is widely used due to its advantages of high salt rejection, simple and convenient operation and maintenance, low running cost, etc. However, impurities brought by feed water in the use process of the reverse osmosis membrane can form dirt on the reverse osmosis membrane, so that various problems of reduction of the desalination rate, increase of the pressure difference, reduction of the water permeability and the like of the reverse osmosis membrane are caused, and the service life and the water quality of produced water of the reverse osmosis membrane are reduced. Therefore, after a reverse osmosis membrane has been in operation for a period of time, it is often necessary to clean its surface to restore its function to its fullest extent.
CN215822798U discloses an RO membrane self-cleaning system, including the raw water conveyer pipe that communicates in proper order, the raw water delivery pump, first filter, the force (forcing) pump, first check valve and RO membrane group, the one end of RO membrane group is equipped with the water inlet, the other end is equipped with pure water outlet and dense water export, the water inlet is connected with the washing charge device, the pure water export communicates with the reuse water tank through first outlet pipe, dense water export communicates with the dense water tank through the second outlet pipe, the washing charge device includes the washing liquid conveyer pipe, alkali lye batch meter and acidizing fluid batch meter, the washing liquid conveyer pipe is linked together with the water inlet of RO membrane group, and install second check valve and cleaning pump on the washing liquid conveyer pipe, be connected with the alkali lye discharge pipe on alkali lye batch meter and the acidizing fluid batch meter lateral wall respectively, the acidizing fluid discharge pipe.
CN208869361U discloses an RO membrane automatic cleaning device, which comprises a raw water tank, a pure water tank, an RO membrane and a water pump, wherein one end of the water pump is connected with a water outlet of the raw water tank, the other end of the water pump is connected with a water inlet of the RO membrane, a first water outlet of the RO membrane is connected with a water inlet of the pure water tank, a first valve body is connected between the raw water tank and the water pump, and a second water outlet of the RO membrane is connected with a second valve body; still include third valve body and fourth valve body, third valve body one end is connected between first valve body and water pump, and the other end is connected in pure water case delivery port, fourth valve body one end is connected between second valve body and RO membrane, and the other end is connected in former water tank water inlet.
CN216604783U discloses an online belt cleaning device of reverse osmosis membrane for water purification equipment, including solvent case, reverse osmosis membrane shell, filter and charge device, the delivery port of solvent case passes through the outlet pipe and is connected with the former water piping of reverse osmosis membrane shell, be provided with first valve, first PH meter and scavenging pump on the outlet pipe, the water inlet of former water piping connection solvent case is passed through to the former water piping front end, be provided with the fourth valve on the product water pipe of reverse osmosis membrane shell, be provided with the fifth valve on the concentrate pipe, the water inlet of back flow connection solvent case is passed through to the concentrate pipe between fifth valve and the reverse osmosis membrane shell, be provided with sixth valve, second PH meter and filter on the back flow, charge device passes through the water inlet of injection union coupling solvent case.
The function that current reverse osmosis membrane belt cleaning device can't realize detecting reverse osmosis membrane and wasing two kinds of mode automatic switch-over can not effectively judge reverse osmosis membrane's cleaning performance automatically in the cleaning process, more can't realize automatically that it is qualified to produce water to carry out many times detection washing to reverse osmosis membrane, and not only extravagant manpower is not convenient for manage, detects the cleaning process moreover and has consumed long time, has increased manufacturing cost. Therefore, it is necessary to design a new reverse osmosis membrane cleaning device.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a reverse osmosis membrane automatic cleaning detection device, which can realize the automatic switching of two modes of detection and cleaning of the reverse osmosis membrane, thereby automatically and effectively judging the cleaning effect of the reverse osmosis membrane in the cleaning process, and automatically detecting and cleaning the reverse osmosis membrane for a plurality of times until the technical requirements are met; the utility model provides a reverse osmosis membrane self-cleaning detection device has effectively improved cleaning performance and the cleaning efficiency to reverse osmosis membrane to whole process full automatization goes on, need not artifical the switching, has saved time cost and human cost.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a reverse osmosis membrane self-cleaning detection device, reverse osmosis membrane self-cleaning detection device includes the reverse osmosis membrane subassembly, the one end of reverse osmosis membrane subassembly is passed through the inlet tube and is connected with raw water storage device, the other end of reverse osmosis membrane subassembly passes through the pure water pipe and is connected with pure water storage device, the inlet tube with all be provided with pressure detection spare and conductivity detection spare on the pure water pipe, pressure detection spare with conductivity detection spare all with control module electric connection.
The raw water storage device is connected with an alkali liquor storage device through an alkali liquor pipe, the raw water storage device is further connected with an acid liquor storage device through an acid liquor pipe, a valve and a dosing pump are arranged on the alkali liquor pipe and the acid liquor pipe, the valve and the dosing pump are electrically connected with a pH control device, the pH control device is electrically connected with a control module, the control module regulates and controls the pH control device according to signals of the pressure detection piece and the conductivity detection piece, and the pH control device regulates and controls the valve and the dosing pump; the pH control device is electrically connected with a pH detection element, and the pH detection element is immersed in liquid in the raw water storage device.
The utility model discloses a pressure and the conductivity of liquid in pressure measurement spare and the conductivity measurement spare real-time supervision inlet tube and the pure water pipe, pressure differential and conductivity around the real-time supervision reverse osmosis membrane subassembly promptly to with signal transmission to control module.
When the pressure detection piece detects that the front and back pressure difference of the reverse osmosis membrane component is in a normal range (less than or equal to 0.2 MPa), and the conductivity of liquid in a pure water pipe behind the reverse osmosis membrane component is in a normal range (less than or equal to 15 us/cm), the whole reverse osmosis membrane automatic cleaning detection device is in a normal working state, namely a detection mode.
When the pressure detection piece detects that the front and back pressure difference of the reverse osmosis membrane assembly exceeds the normal range and/or the conductivity of liquid in the pure water pipe behind the reverse osmosis membrane assembly exceeds the normal range, the reverse osmosis membrane is indicated to have the blocking condition, and the whole reverse osmosis membrane automatic cleaning detection device is switched to the cleaning mode from the detection mode, and the specific process is as follows:
firstly, a control module regulates and controls a pH control device, the pH control device regulates and controls a valve on an alkali liquor pipe and a dosing pump to be started, alkali liquor in the alkali liquor storage device flows into a raw water storage device, the pH of liquid in a raw water tank is regulated to be strong alkaline to carry out alkali washing (20-40 min) on a reverse osmosis membrane, the pH of the liquid in the raw water tank is monitored through a pH detection element, a signal is transmitted to the pH control device, the pH control device regulates and controls the opening degree of the valve, and the pH stability of the liquid in the raw water tank in the alkali washing process is maintained; meanwhile, the pressure monitoring part and the conductivity detection part monitor the pressure difference and the conductivity of the reverse osmosis membrane in real time in the alkali washing process, and transmit signals to the central control box.
After the alkaline cleaning is finished, the control module regulates and controls the pH control device, the pH control device regulates and controls the valve piece and the dosing pump on the alkaline liquid pipe to be closed, and regulates and controls the valve piece and the dosing pump on the acid liquid pipe to be opened, acid liquid in the acid liquid storage device flows into the raw water storage device, the pH of liquid in the raw water tank is regulated to be strong acid, the reverse osmosis membrane is pickled (for 20-40 min), the pH of the liquid in the raw water tank is monitored through the pH detection element, a signal is transmitted to the pH control device, the pH control device regulates and controls the opening degree of the valve piece, and the pH of the liquid in the raw water tank is maintained to be stable in the pickling process; meanwhile, the pressure monitoring part and the conductivity detection part monitor the pressure difference and the conductivity of the reverse osmosis membrane in real time in the pickling process, and transmit signals to the central control box.
After the acidity is finished, the control module regulates and controls the pH control device, the pH control device regulates and controls the closing of a valve on an acid liquid pipe and a dosing pump, and regulates and controls the opening of the valve on an alkali liquid pipe and the dosing pump, alkali liquid in the alkali liquid storage device flows into a raw water storage device, the pH of liquid in a raw water tank is regulated to be neutral, the valve on the alkali liquid pipe and the dosing pump are closed, and the whole automatic reverse osmosis membrane cleaning detection device is switched from a cleaning mode to a detection mode; the pressure detection part and the conductivity detection part detect whether the pressure difference between the front and the back of the reverse osmosis membrane assembly and the conductivity of liquid in the pure water pipe behind the reverse osmosis membrane assembly are both in a normal range, if the pressure difference and the conductivity are both in the normal range, the reverse osmosis membrane is cleaned, and the whole automatic reverse osmosis membrane cleaning detection device can work normally; if any one of the two is not in the normal range, repeating the process to carry out the next round of alkali washing-acid washing-detection until the pressure difference and the conductivity before and after the reverse osmosis membrane are both in the normal range.
The utility model provides a reverse osmosis membrane self-cleaning detection device can realize the automatic switching of detecting and cleaning two modes to reverse osmosis membrane, thereby can automatically and effectively judge the cleaning effect of reverse osmosis membrane in the cleaning process, and automatically detect and clean reverse osmosis membrane for a plurality of times until the technological requirement is reached; the utility model provides a reverse osmosis membrane self-cleaning detection device has effectively improved cleaning performance and the cleaning efficiency to reverse osmosis membrane to whole process full automatization goes on, need not artifical the switching, has saved time cost and human cost.
Furthermore, the utility model provides an be strong acid and alkali in acidizing fluid storage device and the alkali lye storage device, and join in marriage sour, join in marriage the alkali and take place in raw water storage device, the event has reduced acidizing fluid storage device and alkali lye storage device's volume, has reduced the area of whole device.
As an optimal technical scheme of the utility model, reverse osmosis membrane subassembly includes at least one reverse osmosis membrane group, the inlet tube is close to reverse osmosis membrane subassembly's one end branch is a branch pipe of intaking, every at least reverse osmosis membrane group all corresponds and connects one branch pipe of intaking, every all be provided with pressure detection spare and conductivity detection spare on the branch pipe of intaking.
As an optimal technical scheme of the utility model, the pure water pipe is close to the one end of reverse osmosis membrane subassembly branches into a pure water branch pipe at least, every reverse osmosis membrane group all corresponds and connects one pure water branch pipe, every all be provided with pressure detection spare and conductivity detection spare on the pure water branch pipe.
The utility model discloses well a plurality of reverse osmosis membrane group are parallelly connected, and its both ends insert inlet tube and pure water pipe through water inlet branch pipe and pure water branch pipe respectively to all be provided with pressure detection spare and conductivity detection spare around every reverse osmosis membrane group, thereby can carry out real-time detection to the jam condition and the cleaning performance of every reverse osmosis membrane group.
As an optimized technical scheme of the utility model, from raw water storage device extremely the direction of reverse osmosis membrane module, feed pump, safety filter and high-pressure pump have set gradually on the inlet tube.
The utility model discloses well inlet tube is close to one end branch of reverse osmosis membrane module and is called the branch point for the position department of a plurality of water inlet branch pipes, and feed pump, safety filter ware and high-pressure pump all set up on the inlet tube between raw water storage device and branch point.
As an optimal technical scheme, the pure water storage device is external to have the pure water return pipe, the pure water return pipe is kept away from pure water storage device's one end with raw water storage device connects.
The utility model discloses the pure water in the well pure water storage device carries out the moisturizing to former water storage device through the pure water return pipe.
As an optimized technical proposal, the reverse osmosis membrane component is kept away from one end of the raw water storage device is also connected with the concentrated water storage device through a concentrated water pipe.
As an optimized technical scheme of the utility model, the dense water pipe is close to the one end of reverse osmosis membrane subassembly branches into a dense water branch pipe at least, every reverse osmosis membrane group all corresponds and connects one dense water branch pipe.
As an optimized technical proposal of the utility model, the alkaline liquor pipe and the valve member on the acid liquor pipe are electric switch valves.
As an optimized technical scheme of the utility model, the acidizing fluid storage device is external to have acid mist absorbing device, acid mist absorbing device is external to have the circulating pump, the circulating pump is used for realizing the circulation of the interior absorption liquid of acid mist absorbing device.
The acid liquor storage device in the utility model is mostly undiluted acid solution, and is connected with the acid mist absorption device, thereby reducing the risk of acid mist leakage and improving the safety of the whole device; in addition, the absorption liquid (such as alkali liquor) in the acid mist absorption device is pumped out by the circulating pump and is pumped in from the top of the acid mist absorption device in a spraying manner, so that the circulating spraying process of the absorption liquid is realized.
As an optimal technical scheme of the utility model, raw water storage device pure water storage device concentrated water storage device alkali lye storage device with all be provided with liquid level detection spare on the acidizing fluid storage device, liquid level detection spare all with control module electric connection.
The utility model discloses in each storage device all be provided with liquid level detection device, can the liquid level change in each storage device of real-time supervision, the control module of being convenient for regulates and control each storage device.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a reverse osmosis membrane self-cleaning detection device can realize the automatic switching of detecting and cleaning two modes to reverse osmosis membrane, thereby can automatically and effectively judge the cleaning effect of reverse osmosis membrane in the cleaning process, and automatically detect and clean reverse osmosis membrane for a plurality of times until the technological requirement is reached; the utility model provides a reverse osmosis membrane self-cleaning detection device has effectively improved cleaning performance and the cleaning efficiency to reverse osmosis membrane to whole process full automatization goes on, need not artifical the switching, has saved time cost and human cost.
Drawings
Fig. 1 is a schematic structural diagram of a reverse osmosis membrane automatic cleaning and detecting device provided in an embodiment of the present invention.
Wherein, 1 is a raw water storage device; 2-a feed pump; 3-cartridge filter; 4-a high pressure pump; 5-reverse osmosis membrane group; 6-a concentrated water storage device; 7-a pure water storage device; 8-a first pressure detection member; 9-a first conductivity detection element; 10-a second pressure detection member; 11-a second conductivity detector; 12-an acid storage device; 13-an alkali liquor storage device; 14-acid liquor dosing pump; 15-alkali liquor dosing pump; 16-a control module; 17-a pH control device; 18-a first valve member; 19-a second valve member; 20-a pH detection element; 21-water inlet pipe; 22-pure water pipe; 23-a thick water pipe; 24-a pure water return pipe; 25-acid mist absorption means; 26-circulating pump.
Detailed Description
It is to be understood that in the description of the present invention, the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" in the description of the present invention are to be construed broadly, and may for example be fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
In a specific embodiment, the utility model provides a reverse osmosis membrane self-cleaning detection device, as shown in fig. 1, reverse osmosis membrane self-cleaning detection device includes the reverse osmosis membrane subassembly, the one end of reverse osmosis membrane subassembly is passed through inlet tube 21 and is connected with raw water storage device 1, the other end of reverse osmosis membrane subassembly passes through pure water pipe 22 and is connected with pure water storage device 7, inlet tube 21 with all be provided with pressure detection spare and conductivity detection spare on the pure water pipe 22, pressure detection spare with the conductivity detection spare all with control module 16 electric connection.
The raw water storage device 1 is connected with an alkali liquor storage device 13 through an alkali liquor pipe, the raw water storage device 1 is further connected with an acid liquor storage device 12 through an acid liquor pipe, a valve and a dosing pump are arranged on the alkali liquor pipe and the acid liquor pipe, the valve and the dosing pump are both electrically connected with a pH control device 17, the pH control device 17 is electrically connected with a control module 16, the control module 16 regulates and controls the pH control device 17 according to signals of the pressure detection piece and the conductivity detection piece, and the pH control device 17 regulates and controls the valve and the dosing pump; the pH control device 17 is electrically connected to a pH detecting element 20, and the pH detecting element 20 is immersed in the liquid in the raw water storage device 1.
The utility model discloses in can mark pressure detection spare and conductivity detection spare on inlet tube 21 as first pressure detection spare 8 and first conductivity detection spare 9, wherein first pressure detection spare 8 is used for detecting the pressure in inlet tube 21, and first conductivity detection spare 9 is used for detecting the liquid conductivity (generally control 150 ~ 250 us/cm) that flows into the reverse osmosis membrane subassembly; the pressure detector and the conductivity detector on the deionized water pipe 22 are referred to as a second pressure detector 10 and a second conductivity detector 11, wherein the second pressure detector 10 is used for detecting the pressure in the deionized water pipe 22, and the second conductivity detector 11 is used for detecting the conductivity of the liquid in the deionized water pipe 22.
The utility model discloses a pressure and the conductivity of liquid in pressure measurement spare and conductivity measurement spare real-time supervision inlet tube 21 and pure water pipe 22, pressure differential and conductivity around the real-time supervision reverse osmosis membrane subassembly promptly to with signal transmission to control module 16.
When the pressure detection part detects that the front and back pressure difference of the reverse osmosis membrane component is in a normal range (less than or equal to 0.2 MPa), and the conductivity of the liquid in the pure water pipe 22 behind the reverse osmosis membrane component is in a normal range (less than or equal to 15 us/cm), the whole reverse osmosis membrane automatic cleaning detection device is in a normal working state, namely a detection mode. When the pressure detection part detects that the front and back pressure difference of the reverse osmosis membrane assembly exceeds the normal range and/or the conductivity of the liquid in the pure water pipe 22 behind the reverse osmosis membrane assembly exceeds the normal range, the reverse osmosis membrane is indicated to be blocked, and the whole automatic cleaning detection device for the reverse osmosis membrane is switched from the detection mode to the cleaning mode. The reverse osmosis membrane is automatically detected and cleaned for a plurality of times in the cleaning process until the front and back pressure difference of the reverse osmosis membrane assembly and the conductivity of liquid in the pure water pipe 22 behind the reverse osmosis membrane assembly are in a normal range, and then the cleaning mode of the automatic reverse osmosis membrane cleaning and detecting device is switched to the detection mode.
The valve member and the dosing pump on the acid liquor pipe of the utility model are marked as a first valve member 18 and an acid liquor dosing pump 14, and the valve member on the alkaline liquor pipe is marked as a second valve member 19 and an alkaline liquor dosing pump 15; the pH control device 17 controls the first valve element 18 and the acid liquor dosing pump 14, and the second valve element 19 and the alkali liquor dosing pump 15, respectively, so as to perform alkali washing and acid washing on the reverse osmosis membrane, respectively.
The utility model provides a reverse osmosis membrane self-cleaning detection device can realize the automatic switching of detecting and cleaning two modes to reverse osmosis membrane, thereby can automatically and effectively judge the cleaning effect of reverse osmosis membrane in the cleaning process, and automatically detect and clean reverse osmosis membrane for a plurality of times until the technological requirement is reached; the utility model provides a reverse osmosis membrane self-cleaning detection device has effectively improved cleaning performance and the cleaning efficiency to reverse osmosis membrane to whole process full automatization goes on, need not artifical the switching, has saved time cost and human cost.
Furthermore, the utility model provides an be strong acid and alkali in acidizing fluid storage device 12 and the alkali lye storage device 13, and join in marriage sour, join in marriage the alkali and take place in raw water storage device 1, the event has reduced acidizing fluid storage device 12 and alkali lye storage device 13's volume, has reduced the area of whole device.
Further, the reverse osmosis membrane module includes at least one reverse osmosis membrane group 5, inlet tube 21 is close to the one end of reverse osmosis membrane module branches into a branch pipe of intaking at least, every reverse osmosis membrane group 5 all corresponds and connects one branch pipe of intaking, every all be provided with pressure detection spare and conductivity detection spare on the branch pipe of intaking.
Furthermore, one end of the pure water pipe 22 close to the reverse osmosis membrane module is at least branched into a pure water branch pipe, each reverse osmosis membrane module 5 is correspondingly connected with one pure water branch pipe, and each pure water branch pipe is provided with a pressure detection part and a conductivity detection part.
The utility model discloses well a plurality of reverse osmosis membrane group 5 are parallelly connected, and its both ends insert inlet tube 21 and pure water pipe 22 through intake branch pipe and pure water branch pipe respectively to all be provided with pressure detection spare and conductivity detection spare around every reverse osmosis membrane group 5, thereby can carry out real-time detection to the jam condition and the cleaning performance of every reverse osmosis membrane group 5.
Further, a feed pump 2, a cartridge filter 3 and a high pressure pump 4 are sequentially arranged on the water inlet pipe 21 from the raw water storage device 1 to the reverse osmosis membrane module.
The utility model discloses well inlet tube 21 is close to reverse osmosis membrane module's one end branch and is called the branch point for the position department of a plurality of water inlet branch pipes, and feed pump 2, cartridge filter 3 and high-pressure pump 4 all set up on inlet tube 21 between raw water storage device 1 and branch point.
Furthermore, a pure water return pipe 24 is externally connected to the pure water storage device 7, and one end of the pure water return pipe 24, which is far away from the pure water storage device 7, is connected to the raw water storage device 1.
The utility model discloses the pure water in the well pure water storage device 7 carries out the moisturizing to raw water storage device 1 through pure water return pipe 24.
Further, one end of the reverse osmosis membrane module, which is far away from the raw water storage device 1, is also connected with a concentrated water storage device 6 through a concentrated water pipe 23.
Furthermore, one end of the concentrated water pipe 23 close to the reverse osmosis membrane module is branched into at least one concentrated water branch pipe, and each reverse osmosis membrane module 5 is correspondingly connected with one concentrated water branch pipe.
Further, valve members on the alkaline liquor pipe and the acid liquor pipe are both electric switch valves.
Further, the acid liquid storage device 12 is externally connected with an acid mist absorption device 25, the acid mist absorption device 25 is externally connected with a circulation pump 26, and the circulation pump 26 is used for realizing circulation of the absorption liquid in the acid mist absorption device 25.
In the utility model, the acid solution storage device 12 is mostly undiluted acid solution, and the acid solution storage device 12 is connected with the acid mist absorption device 25, thereby reducing the risk of acid mist leakage and improving the safety of the whole device; in addition, the absorption liquid (such as lye) in the acid mist absorption device 25 is pumped out by the circulating pump 26 and is driven in a spraying manner from the top of the acid mist absorption device 25, so that the circulating spraying process of the absorption liquid is realized.
Further, liquid level detection parts are arranged on the raw water storage device 1, the pure water storage device 7, the concentrated water storage device 6, the alkali liquor storage device 13 and the acid liquor storage device 12, and the liquid level detection parts are electrically connected with the control module 16.
The utility model discloses well each storage device all is provided with liquid level detection spare, can the liquid level change in each storage device of real-time supervision, and the control module 16 of being convenient for regulates and control each storage device. Furthermore, the utility model discloses well pressure detection spare includes pressure sensor, and conductivity detection spare includes conductivity sensor, and liquid level detection spare includes level sensor.
Exemplarily, as shown in fig. 1, when the automatic cleaning and detecting device for reverse osmosis membrane provided by the present invention is adopted, when the pressure detecting element detects that the front and back pressure difference of the reverse osmosis membrane assembly is within the normal range (not more than 0.2 MPa), and the conductivity of the liquid in the pure water pipe 22 behind the reverse osmosis membrane assembly is within the normal range (not more than 15 us/cm), the whole automatic cleaning and detecting device for reverse osmosis membrane is in the normal working state, i.e. the detection mode.
When the pressure detection piece detects that the front and back pressure difference of the reverse osmosis membrane assembly exceeds the normal range and/or the conductivity of liquid in the pure water pipe 22 behind the reverse osmosis membrane assembly exceeds the normal range, the reverse osmosis membrane is indicated to be blocked, the whole automatic reverse osmosis membrane cleaning detection device is switched to a cleaning mode from a detection mode, and the specific process is as follows:
firstly, a control module 16 regulates and controls a pH control device 17, the pH control device 17 regulates and controls a second valve element 19 and an alkali liquor dosing pump 15 to be started, alkali liquor in an alkali liquor storage device 13 flows into a raw water storage device 1, the pH of liquid in a raw water tank is regulated to be strong alkaline to carry out alkaline washing (20-40 min) on a reverse osmosis membrane, the pH of the liquid in the raw water tank is monitored through a pH detection element 20, a signal is transmitted to the pH control device 17, the pH control device 17 regulates and controls the opening degree of the valve element, and the pH of the liquid in the raw water tank is maintained to be stable in the alkaline washing process; meanwhile, the pressure monitoring component and the conductivity detection component monitor the pressure difference and the conductivity before and after the reverse osmosis membrane group 5 in real time in the alkali washing process, and transmit signals to the central control box.
After the alkaline cleaning is finished, the control module 16 regulates and controls the pH control device 17, the pH control device 17 regulates and controls the second valve element 19 and the alkali liquor dosing pump 15 to be closed, and regulates and controls the first valve element 18 and the acid liquor dosing pump 14 to be opened, acid liquor in the acid liquor storage device 12 flows into the raw water storage device 1, the pH of liquid in the raw water tank is regulated to be strong acid to carry out acid cleaning (20-40 min) on the reverse osmosis membrane, the pH of the liquid in the raw water tank is monitored through the pH detection element 20, a signal is transmitted to the pH control device 17, the pH control device 17 regulates and controls the opening of the valve elements, and the pH stability of the liquid in the raw water tank in the acid cleaning process is maintained; meanwhile, the pressure monitoring component and the conductivity detection component monitor the pressure difference and the conductivity before and after the reverse osmosis membrane module 5 in real time in the pickling process, and transmit signals to the central control box.
After the acidity is finished, the control module 16 regulates and controls the pH control device 17, the pH control device 17 regulates and controls the first valve element 18 and the alkali liquor dosing pump 15 to be closed, and regulates and controls the second valve element 19 and the alkali liquor dosing pump 15 to be opened, alkali liquor in the alkali liquor storage device 13 flows into the raw water storage device 1, the pH of liquid in the raw water tank is regulated to be neutral, the second valve element 19 and the alkali liquor dosing pump 15 are closed, and therefore the whole automatic reverse osmosis membrane cleaning detection device is switched from a cleaning mode to a detection mode; the pressure detection part and the conductivity detection part detect whether the pressure difference between the front and the back of the reverse osmosis membrane assembly and the conductivity of the liquid in the pure water pipe 22 behind the reverse osmosis membrane assembly are both in a normal range, if the pressure difference and the conductivity are both in the normal range, the reverse osmosis membrane is cleaned, and the whole automatic reverse osmosis membrane cleaning detection device can work normally; if either of the two is not in the normal range, the process is repeated to carry out the next round of alkali washing-acid washing-detection until the pressure difference and the conductivity before and after the reverse osmosis membrane group 5 are both in the normal range.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. The automatic reverse osmosis membrane cleaning and detecting device is characterized by comprising a reverse osmosis membrane assembly, wherein one end of the reverse osmosis membrane assembly is connected with a raw water storage device through a water inlet pipe, the other end of the reverse osmosis membrane assembly is connected with a pure water storage device through a pure water pipe, a pressure detecting piece and a conductivity detecting piece are arranged on the water inlet pipe and the pure water pipe, and the pressure detecting piece and the conductivity detecting piece are electrically connected with a control module;
the raw water storage device is connected with the alkali liquor storage device through an alkali liquor pipe, the raw water storage device is further connected with the acid liquor storage device through an acid liquor pipe, a valve and a dosing pump are arranged on the alkali liquor pipe and the acid liquor pipe, the valve and the dosing pump are both electrically connected with a pH control device, the pH control device is electrically connected with the control module, the control module regulates and controls the pH control device according to signals of the pressure detection piece and the conductivity detection piece, and the pH control device regulates and controls the valve and the dosing pump; the pH control device is electrically connected with a pH detection element, and the pH detection element is immersed in liquid in the raw water storage device.
2. The automatic reverse osmosis membrane cleaning and detecting device according to claim 1, wherein the reverse osmosis membrane module comprises at least one reverse osmosis membrane module, one end of the water inlet pipe close to the reverse osmosis membrane module is at least branched into one water inlet branch pipe, each reverse osmosis membrane module is correspondingly connected with one water inlet branch pipe, and each water inlet branch pipe is provided with a pressure detecting part and a conductivity detecting part.
3. The automatic reverse osmosis membrane cleaning and detecting device according to claim 2, wherein one end of the pure water pipe close to the reverse osmosis membrane module is branched into at least one pure water branch pipe, each reverse osmosis membrane module is correspondingly connected with one pure water branch pipe, and each pure water branch pipe is provided with a pressure detecting part and a conductivity detecting part.
4. The automatic reverse osmosis membrane cleaning and detecting device according to claim 1, wherein a feed pump, a cartridge filter and a high-pressure pump are sequentially arranged on the water inlet pipe in a direction from the raw water storage device to the reverse osmosis membrane module.
5. The automatic cleaning and detecting device for the reverse osmosis membrane according to claim 1, wherein a pure water return pipe is externally connected to the pure water storage device, and one end of the pure water return pipe, which is far away from the pure water storage device, is connected to the raw water storage device.
6. The automatic reverse osmosis membrane cleaning and detecting device according to claim 2, wherein one end of the reverse osmosis membrane module, which is far away from the raw water storage device, is further connected with a concentrated water storage device through a concentrated water pipe.
7. The automatic reverse osmosis membrane cleaning and detecting device according to claim 6, wherein one end of the concentrated water pipe close to the reverse osmosis membrane module is branched into at least one concentrated water branch pipe, and each reverse osmosis membrane module is correspondingly connected with one concentrated water branch pipe.
8. The automatic cleaning and detecting device for the reverse osmosis membrane according to claim 1, characterized in that valve elements on the alkaline liquid pipe and the acid liquid pipe are electric switch valves.
9. The automatic cleaning and detecting device for the reverse osmosis membrane according to claim 1, wherein the acid liquid storage device is externally connected with an acid mist absorption device, the acid mist absorption device is externally connected with a circulating pump, and the circulating pump is used for realizing circulation of absorption liquid in the acid mist absorption device.
10. The automatic cleaning and detecting device for a reverse osmosis membrane according to claim 6, wherein liquid level detecting elements are arranged on the raw water storage device, the pure water storage device, the concentrated water storage device, the alkali liquid storage device and the acid liquid storage device, and are electrically connected with the control module.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117800551A (en) * | 2024-02-28 | 2024-04-02 | 广东恒扬新材料有限公司 | Control circuit, method and system of purified water device and computer storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117800551A (en) * | 2024-02-28 | 2024-04-02 | 广东恒扬新材料有限公司 | Control circuit, method and system of purified water device and computer storage medium |
| CN117800551B (en) * | 2024-02-28 | 2024-05-17 | 广东恒扬新材料有限公司 | Control circuit, method and system of purified water device and computer storage medium |
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