CN215842509U - Self-purification device of DTRO high pressure reverse osmosis membrane - Google Patents
Self-purification device of DTRO high pressure reverse osmosis membrane Download PDFInfo
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Abstract
A self-purification device of a DTRO high pressure reverse osmosis membrane, comprising: the device comprises a raw water inlet unit, a DTRO treatment unit, a circulating unit, a cleaning unit and a recovery unit; the raw water inlet unit is used for inputting raw water; the output ends of the plurality of filter membrane elements are respectively provided with a first flow passage for outputting concentrated liquid and a second flow passage for outputting cleaning liquid; the output end of the raw water inlet unit and the first flow channel are respectively connected with the input end of the circulating unit, and the circulating units are respectively and independently connected with the filtering membrane elements; the cleaning unit is used for inputting cleaning liquid, and the output end of the cleaning unit is connected with the circulating unit. This scheme rational distribution each set of high pressure filters the operating pressure and the circulation velocity of flow of membrane element for each independent separation function who filters the membrane element can full play, and the rethread is from purification performance, makes the self purification device of this scheme have the advantage of wasing the efficient, can obtain abundant cleanness in each section relevant unit, and practice thrift the required medicament of corresponding washing by a wide margin.
Description
Technical Field
The utility model relates to the technical field of self-purification devices, in particular to a self-purification device of a DTRO (draw texturing RO) high-pressure reverse osmosis membrane.
Background
The existing water purifying device does not treat different water qualities, the clear liquid and the concentrated liquid are directly and respectively discharged after the water body is filtered, and the concentrated liquid is not subjected to further circulation treatment, so that the adaptability to the water quality is low; meanwhile, because raw water enters the high-pressure plunger pump for pressurization after passing through the filter, the two stages of high-pressure plunger pumps are connected in series to raise the water inlet pressure to 90 kilograms, and under the condition of overlarge pressure, the relevant membrane elements are easy to cause scaling blockage, so that the problems of reduced filtering effect and unstable water yield are easily caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a self-purification device of a DTRO high-pressure reverse osmosis membrane, which can realize higher comprehensive recovery rate and mature and stable operation under the condition of ensuring that the requirement of effluent quality is met, and solves the problems of blockage and unstable effluent in the prior art.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a self-purification device of a DTRO high pressure reverse osmosis membrane, comprising: the device comprises a raw water inlet unit, a DTRO treatment unit, a circulating unit, a cleaning unit and a recovery unit;
the raw water inlet unit is used for inputting raw water to be treated, and comprises: a pre-filter and a high pressure pump; the pre-filter and the high-pressure pump are sequentially connected along the conveying direction of raw water;
the DTRO processing unit includes: a plurality of filter membrane elements;
the output ends of the plurality of filter membrane elements are respectively provided with a first flow passage for outputting concentrated liquid and a second flow passage for outputting cleaning liquid;
the output end of the raw water inlet unit and the first flow channel are respectively connected to the input end of the circulating unit, and the output end of the circulating unit is respectively and independently connected to the input ends of different filter membrane elements;
the cleaning unit is used for inputting cleaning liquid, and the output end of the cleaning unit is connected with the circulating unit;
the recovery unit includes: a waste liquid module and a cleaning liquid module;
the waste liquid module is communicated with the circulating unit and is used for receiving waste liquid output by the waste liquid module;
the cleaning liquid module is connected with the second flow passage and is used for receiving the cleaning liquid output by the second flow passage.
Preferably, the high-pressure pump is a variable frequency pump with adjustable operating frequency; and the high-pressure pump is in communication connection with the DTRO processing unit.
More preferably, the number of the high-pressure pumps is at least 2, and a plurality of the high-pressure pumps are arranged in parallel.
Preferably, the circulation unit includes: the system comprises a circulation main pipe, a circulation branch pipe and a shield pump;
the circulating main pipe is provided with the shield pump, and the input end of the circulating main pipe is communicated with the output end of the raw water inlet unit, the output end of the cleaning unit and the output end of the circulating branch pipe; the output end of the circulating main pipe is communicated with the input end of the filtering membrane element; the input end of the circulation branch pipe is communicated with the first flow channel, and the output end of the first flow channel is communicated with the input end of the circulation main pipe.
More preferably, the circulation unit includes: a pressure gauge; the pressure gauge is installed in the circulation main pipe.
Preferably, the waste liquid module comprises: the device comprises a cleaning drainage module and a concentrated solution discharge module;
the input ends of the cleaning drainage module and the concentrated solution discharge module are respectively communicated with the circulating unit through pipelines, and the input ends of the cleaning drainage module and the concentrated solution discharge module are respectively provided with an inlet valve;
the cleaning drainage module is used for receiving mixed liquid with the cleaning liquid output by the cleaning unit;
the concentrated liquid discharging module is used for receiving mixed liquid with concentrated liquid output by the first flow channel.
Further optimally, the waste liquid module further comprises: the flushing backflow module, the flushing pipe and the waste liquid main pipe are arranged;
the input end of the waste liquid header pipe is respectively connected to the circulating unit, and the output end of the waste liquid header pipe is respectively communicated with the flushing reflux module and the concentrated liquid discharge module; the input end of the flushing pipe is communicated with the circulating unit, and the output end of the flushing pipe is communicated with the waste liquid main pipe; and an inlet valve is arranged at the input end of the flushing backflow module.
Still further optimally, the input end of the waste liquid main pipe and the input end of the flushing pipe are respectively provided with an inlet valve.
Optimally, the output ends of the raw water inlet unit and the cleaning unit are respectively provided with an inlet valve, and the inlet valves are in communication connection.
Preferably, at least one of the raw water inlet unit, the DTRO treatment unit, the circulation unit, the cleaning unit and the recovery unit is provided with a flow meter; the flow meter is in communication with the inlet valve.
The utility model has the beneficial effects that:
the DTRO high pressure reverse osmosis membrane's of this scheme self purification device, it has high, the water yield is stable to the quality of water adaptability of intaking, and the advantage that the system operation is nimble and degree of automation is high can realize higher comprehensive utilization ratio under the equal water effect of producing, and washs the high efficiency, and it is convenient to maintain. This scheme rational distribution each set of high pressure filters the operating pressure and the circulation velocity of flow of membrane element for each independent separation function who filters the membrane element can full play, and the rethread is from purification performance, makes the self purification device of this scheme have the advantage of wasing the efficient, can practice thrift corresponding required medicament of wasing by a wide margin under each section relevant unit can obtain abundant clear prerequisite.
Drawings
Fig. 1 is a schematic structural view of one embodiment of a self-purification apparatus.
FIG. 2 is a schematic diagram of the construction of one embodiment of a filter membrane element.
Wherein:
a raw water inlet unit 1, a DTRO treatment unit 2, a circulation unit 3, a cleaning unit 4 and a recovery unit 5; an inlet valve 6;
a pre-filter 11, a high pressure pump 12; a filtration membrane element 21; first and second flow paths 211 and 212;
a main circulation pipe 31, a branch circulation pipe 32, a shield pump 33 and a pressure gauge 34;
a waste liquid module 51 and a cleaning liquid module 52; a cleaning drainage module 511, a concentrated solution discharge module 512 and a washing reflux module 513; flushing pipe 514, waste liquid main 515.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The technical solution of the present solution is further explained by the following embodiments with reference to the accompanying drawings.
A self-purification device of a DTRO high pressure reverse osmosis membrane, comprising: a raw water inlet unit 1, a DTRO treatment unit 2, a circulation unit 3, a cleaning unit 4 and a recovery unit 5;
the raw water inlet unit 1 is used for inputting raw water to be treated, and the raw water inlet unit 1 comprises: a pre-filter 11 and a high pressure pump 12; the pre-filter 11 and the high-pressure pump 12 are sequentially connected along the conveying direction of raw water;
the DTRO processing unit 2 includes: a plurality of filter membrane elements 21;
the output ends of the plurality of filter membrane elements 21 are respectively provided with a first flow passage 211 for outputting concentrated liquid and a second flow passage 212 for outputting cleaning liquid;
the output end of the raw water inlet unit 1 and the first flow channel 211 are respectively connected to the input end of the circulation unit 3, and the output end of the circulation unit 3 is respectively and independently connected to the input end of different filter membrane elements 21;
the cleaning unit 4 is used for inputting cleaning liquid, and the output end of the cleaning unit 4 is connected to the circulating unit 3;
the recovery unit 5 includes: a waste liquid module 51 and a cleaning liquid module 52;
the waste liquid module 51 is communicated with the circulating unit 3, and the waste liquid module 51 is used for receiving waste liquid output by the waste liquid module 51;
the cleaning solution module 52 is connected to the second flow channel 212, and the cleaning solution module 52 is configured to receive the cleaning solution output by the second flow channel 212.
The DTRO high pressure reverse osmosis membrane's of this scheme self purification device, it has high, the water yield is stable to the quality of water adaptability of intaking, and the advantage that the system operation is nimble and degree of automation is high can realize higher comprehensive utilization ratio under the equal water effect of producing, and washs the high efficiency, and it is convenient to maintain. This scheme rational distribution each set of high pressure filters the operating pressure and the circulation velocity of flow of membrane element 21 for each independent filtration membrane element 21's separation function can full play, and the rethread is from purification performance, makes the purifier of this scheme have the advantage of wasing the efficient, can practice thrift corresponding required medicament of wasing by a wide margin under each section relevant unit can obtain abundant clear prerequisite.
Specifically, the raw water inlet unit 1 is used for inputting raw water to be treated, as shown in fig. 1, the direction of the arrow is the direction of conveyance of raw water, such as domestic sewage, industrial sewage, etc.; raw water to be treated sequentially flows through the pre-filter 11 and the high-pressure pump 12, and the pre-filter 11 can pre-filter sewage to reduce the filtering pressure of a subsequent system; the high-pressure pump 12 is used for pressurizing the water body after pre-filtration, so that the water body is conveyed to the circulating unit 3; after receiving the raw water, the circulation unit 3 transfers the raw water to the plurality of filtering membrane elements 21, and the raw water enters from the input ends of the different filtering membrane elements 21; as shown in fig. 2, the filter membrane element 21 has two output ends, one being a first flow path 211 for outputting a concentrated liquid portion in raw water, and the other being a second flow path 212 for outputting a washing liquid portion in raw water; the first flow channel 211 reflows the concentrated solution to the circulation unit 3 again for circulation, so that the concentrated solution can enter the filtering membrane element 21 for multiple times of filtering, and after the cleaning solution reaches the standard of being able to be discharged, the cleaning solution is discharged from the second flow channel 212 to the cleaning solution module 52, and the concentrated solution is separated from the circulation unit 3 and is output to the waste solution module 51; meanwhile, the cleaning unit 4 of the scheme is communicated with the circulating unit 3 and can output cleaning fluid to the circulating unit 3 so as to dilute the concentrated solution or the raw water of the circulating unit 3 and supplement water for the concentrated solution or the raw water; the direction of the arrow shown in fig. 1 is the conveying direction of the cleaning liquid; meanwhile, the cleaning unit 4 can output the cleaning liquid to the circulation unit 3 so that the cleaning liquid flows through the filter membrane element 21 to clean each unit such as the DTRO processing unit 2 and provide a self-purification function for the system; further, in the case where the raw water inlet unit 1 does not supply raw water, the cleaning solution can be supplied through the cleaning unit 4, and the cleaning solution can be directly supplied after passing through the circulation unit 3, the DTRO treatment unit 2, and the cleaning solution module 52, so that the water output from the purification apparatus can be stabilized. Therefore, the scheme can flexibly regulate and control each stage of the raw water inlet unit 1, the DTRO treatment unit 2, the circulating unit 3, the cleaning unit 4 and the recovery unit 5 so as to realize the advantages of stable water yield, high comprehensive utilization rate, high cleaning efficiency and convenient maintenance.
The cleaning liquid is used for cleaning the waste, wherein in one embodiment, the cleaning liquid is pure water; in one embodiment, the cleaning solution is tap water; in one embodiment, a decontamination chemical may be added to the water.
Preferably, the high-pressure pump 12 is a variable frequency pump with adjustable operating frequency; the high pressure pump 12 is in communication connection with the DTRO processing unit 2.
The high-pressure pump 12 of the scheme is a variable-frequency pump, and can increase the operation frequency within an allowable range according to specific requirements, increase the overall operation working pressure of the self-purification device and improve the utilization rate of discharged water; meanwhile, the high-pressure pump 12 is in communication connection with the DTRO processing unit 2, the communication connection is a connection mode, and indirect or direct communication is formed between connected devices through transmission interaction of signals; the communication connection comprises wired connection and wireless connection; the wired connection is a general data line connection, and the wireless connection is a general WiFi, Bluetooth, infrared and the like connection. Therefore, the system can distribute the pressure by changing the operating pressure of the higher pressure pump 12 and the number of the filtering membrane elements 21 in the DTRO treatment unit 2, for example, the pressure can be adjusted according to different requirements, the pressure can be adjusted preferably within the range of 70-90bar, and the number of the filtering membrane elements 21 can be adjusted preferably from 24-48, so that the operating pressure and the circulating flow rate of each set of the filtering membrane elements 21 can be reasonably distributed, and the separation function of each set of the independent filtering membrane elements 21 can be fully exerted.
Preferably, the number of said high-pressure pumps 12 is at least 2, a plurality of said high-pressure pumps 12 being arranged in parallel.
As shown in fig. 1, in the present embodiment, preferably, a plurality of high-pressure pumps 12 are provided, and preferably, the high-pressure pumps 12 and the high-pressure pumps 12 are provided in parallel, so that pressure control is performed on raw water output from the raw water inlet unit 1 through the plurality of high-pressure pumps 12, thereby reducing the possibility of scale blockage in the pipeline of the raw water inlet unit 1, and making the relevant filter membrane elements 21 not easily cause scale blockage under the same pressure, compared with a structure in which a plurality of high-pressure pumps 12 are connected in series, a structure in which a plurality of high-pressure pumps 12 are provided in parallel can realize more mature stable operation, and the overall recovery rate is as high as 85%, while the overall recovery rate of the structure in which the high-pressure pumps 12 are connected in series is lower, generally about 60% -70%.
Preferably, the circulation unit 3 comprises: a main circulation pipe 31, a branch circulation pipe 32 and a shield pump 33;
the shielding pump 33 is installed on the main circulation pipe 31, and the input end of the main circulation pipe 31 is communicated with the output end of the raw water inlet unit 1, the output end of the cleaning unit 4 and the output end of the branch circulation pipe 32; the output end of the main circulation pipe 31 is communicated with the input end of the filter membrane element 21; the input end of the circulation branch pipe 32 is communicated with the first flow passage 211, and the output end of the first flow passage 211 is communicated with the input end of the circulation main pipe 31.
The circulating unit 3 comprises a circulating main pipe 31, a circulating branch pipe 32 and a shielding pump 33, wherein the circulating main pipe 31 is used for receiving concentrated liquid from the circulating branch pipe 32, pre-filtered raw water from the raw water inlet unit 1 and cleaning liquid from the cleaning unit 4, the trend of the concentrated liquid, the raw water and the cleaning liquid can be controlled in the circulating main pipe 31, the raw water inlet unit 1, the DTRO treatment unit 2 and the cleaning unit 4 are communicated with the circulating unit 3 independently or simultaneously, the concentrated liquid, the raw water and the cleaning liquid can be flexibly circulated in the system, so that higher comprehensive utilization rate under the same water production effect can be fully realized, and the problems of low comprehensive recovery rate and unstable water production in the prior art are solved.
More preferably, the circulation unit 3 comprises: a pressure gauge 34;
the pressure gauge 34 is installed in the main circulation pipe 31.
The pressure gauge 34 is used for detecting the pressure of the water passing through the main circulation pipe 31, the pressure gauge 34 can be preferably in communication connection with the plurality of filtering membrane elements 21 in the DTRO processing unit 2, the pressure gauge 34 can automatically output the water to the filtering membrane elements 21 with different quantities according to the pressure, and then the operation pressure and the circulation flow rate of each set of filtering membrane elements 21 are reasonably distributed, so that the separation function of each set of independent filtering membrane elements 21 is fully exerted.
Preferably, the waste liquid module 51 comprises: a cleaning drainage module 511 and a concentrated solution discharge module 512;
the input ends of the cleaning drainage module 511 and the concentrated solution discharge module 512 are respectively communicated with the circulating unit 3 through pipelines, and the input ends of the cleaning drainage module 511 and the concentrated solution discharge module 512 are respectively provided with an inlet valve 6;
the cleaning drainage module 511 is used for receiving the mixed liquid with the cleaning liquid output by the cleaning unit 4;
the concentrate discharge module 512 is configured to receive mixed liquid with the concentrate output from the first flow channel 211.
The waste liquid module 51 is used for collecting waste water with different pollution degrees and can be roughly divided into a cleaning drainage module 511 and a concentrated liquid discharge module 512; the cleaning drainage module 511 is used for receiving the waste water after the system is cleaned by the cleaning unit 4, and the waste water is cleaner; the concentrated liquid discharging module 512 is configured to receive the concentrated liquid output from the first flow channel 211, where the amount of concentrated liquid in the water body is large and the pollution degree is large. The waste liquid module 51 can adjust the opening and closing states of the inlet valves 6 in each of the raw water inlet unit 1, the DTRO treatment unit 2, the circulating unit 3, the cleaning unit 4 and the recovery unit 5 through a system, adjust the flow of the water body in the pipelines of each unit, and further control the trend of the cleaning liquid and the concentrated liquid, and recycle the cleaning liquid and the concentrated liquid in different modules, so that the cleaning is efficient, and the maintenance of the water body is convenient.
More preferably, the waste liquid module 51 further comprises: a flushing reflux module 513, a flushing pipe 514 and a waste liquid header pipe 515;
the input end of the waste liquid header pipe 515 is respectively connected to the circulation unit 3, and the output end of the waste liquid header pipe 515 is respectively communicated with the flushing reflux module 513 and the concentrated liquid discharge module 512; the input end of the flushing pipe 514 is communicated with the circulating unit 3, and the output end of the flushing pipe 514 is communicated with the waste liquid main pipe 515; the input of the flushing return module 513 is provided with an inlet valve 6.
In addition to the cleaning liquid and the concentrated liquid, the scheme can also carry out cleaning liquid washing on the system through the cleaning unit 4, and the cleaning liquid flows through each unit to wash the waste liquid remained in each pipeline and part; in the present embodiment, the washing and reflowing module 513 is configured to receive the cleaning solution with the residual waste, and the pollution degree of the cleaning solution is between the cleaning solution and the concentrated solution; the concentrated solution is input into a concentrated solution discharge module 512 from a waste solution header pipe 515, and the waste solution is completely recovered; after the cleaning liquid output by the cleaning unit 4 circularly cleans the DTRO processing unit 2 and the circulation unit 3 of the system, the cleaning liquid with the residual waste liquid can enter the waste liquid main pipe 515 through the flushing pipe 514 to clean the waste liquid main pipe 515, so that the problem that the subsequent waste liquid in the waste liquid main pipe 515 causes secondary pollution to other waste liquid to increase the recovery processing cost can be avoided, and the waste liquid is further prevented from being residual; after the cleaning solution is washed for multiple times, the content of residual solution in the cleaning solution at the front part is large, and the cleaning solution can be output to the concentrated solution discharge module 512; along with the change of the washing time, the pollution degree of the washing is low, the pollution degree is between the clear liquid and the concentrated liquid, and the pollution degree can be output to the washing backflow module 513. Therefore, the scheme can flexibly treat water bodies with different degrees, and can realize higher comprehensive utilization rate under the same water production effect.
Preferably, the input end of the waste liquid main pipe 515 and the input end of the flushing pipe 514 are respectively provided with an inlet valve 6.
The input end of the waste liquid main pipe 515 and the input end of the flushing pipe 514 are provided with inlet valves 6, the system can flexibly adjust the cleaning liquid and the waste liquid by linking the inlet valves 6 of different units, and the comprehensive utilization degree of the water body is improved. The inlet valve 6 is a valve body known to control the passage of water, such as a solenoid valve, a one-way valve, a pneumatic valve, etc., and the actual type of the inlet valve 6 can be determined according to actual conditions.
Optimally, the output ends of the raw water inlet unit 1 and the cleaning unit 4 are respectively provided with an inlet valve 6, and the inlet valves 6 are in communication connection.
The output ends of the raw water inlet unit 1 and the cleaning unit 4 are respectively provided with an inlet valve 6; the system can control the inlet valve 6 at the output end of the raw water inlet unit 1, and further control the flow rate and the on-off state of raw water input into the circulating system; the system can also control an inlet valve 6 at the output end of the cleaning unit 4, so as to control the flow rate and the on-off state of the cleaning liquid input into the circulating unit 3; the system can integrally adjust the inlet valves 6 of different units, so as to control the trend of the cleaning liquid, the concentrated liquid and the residual liquid, and improve the comprehensive utilization capacity of the water body.
Optionally, at least one of the raw water intake unit 1, the DTRO treatment unit 2, the circulation unit 3, the washing unit 4, and the recovery unit 5 is provided with a flow meter; the flow meter is in communication with the inlet valve 6.
The flowmeter (not shown) is used for detecting the flow of water in a pipeline where the flowmeter is located, the flowmeter is in communication connection with the inlet valve 6, the flowmeter and the inlet valve 6 can perform data interaction, and then the system can control the opening state of the inlet valve 6 or the valve opening proportion according to the actual measured flow of the flowmeter, so that the system can automatically regulate the flow direction of the water, and the automation degree is high.
The technical principle of the present solution is described above with reference to specific embodiments. These descriptions are only used to explain the principles of the present solution and should not be interpreted in any way as limiting the scope of the present solution. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present solution without any inventive effort, which would fall within the scope of the present solution.
Claims (10)
1. A self-purification device of a DTRO high pressure reverse osmosis membrane, comprising: the device comprises a raw water inlet unit, a DTRO treatment unit, a circulating unit, a cleaning unit and a recovery unit;
the raw water inlet unit is used for inputting raw water to be treated, and comprises: a pre-filter and a high pressure pump; the pre-filter and the high-pressure pump are sequentially connected along the conveying direction of raw water;
the DTRO processing unit includes: a plurality of filter membrane elements;
the output ends of the plurality of filter membrane elements are respectively provided with a first flow passage for outputting concentrated liquid and a second flow passage for outputting cleaning liquid;
the output end of the raw water inlet unit and the first flow channel are respectively connected to the input end of the circulating unit, and the output end of the circulating unit is respectively and independently connected to the input ends of different filter membrane elements;
the cleaning unit is used for inputting cleaning liquid, and the output end of the cleaning unit is connected with the circulating unit;
the recovery unit includes: a waste liquid module and a cleaning liquid module;
the waste liquid module is communicated with the circulating unit and is used for receiving waste liquid output by the waste liquid module;
the cleaning liquid module is connected with the second flow passage and is used for receiving the cleaning liquid output by the second flow passage.
2. The self-cleaning device of the DTRO high pressure reverse osmosis membrane of claim 1, wherein the high pressure pump is a variable frequency pump with adjustable operating frequency; and the high-pressure pump is in communication connection with the DTRO processing unit.
3. The self-cleaning apparatus of a DTRO high pressure reverse osmosis membrane of claim 2 wherein the number of high pressure pumps is at least 2 and a plurality of high pressure pumps are arranged in parallel.
4. The self-cleaning device of the DTRO high pressure reverse osmosis membrane of claim 1, wherein the circulation unit comprises: the system comprises a circulation main pipe, a circulation branch pipe and a shield pump;
the circulating main pipe is provided with the shield pump, and the input end of the circulating main pipe is communicated with the output end of the raw water inlet unit, the output end of the cleaning unit and the output end of the circulating branch pipe; the output end of the circulating main pipe is communicated with the input end of the filtering membrane element; the input end of the circulation branch pipe is communicated with the first flow channel, and the output end of the first flow channel is communicated with the input end of the circulation main pipe.
5. The self-cleaning device of the DTRO high pressure reverse osmosis membrane of claim 4, wherein the circulation unit comprises: a pressure gauge;
the pressure gauge is installed in the circulation main pipe.
6. The self-cleaning device of a DTRO high pressure reverse osmosis membrane of claim 1, wherein the waste liquid module comprises: the device comprises a cleaning drainage module and a concentrated solution discharge module;
the input ends of the cleaning drainage module and the concentrated solution discharge module are respectively communicated with the circulating unit through pipelines, and the input ends of the cleaning drainage module and the concentrated solution discharge module are respectively provided with an inlet valve;
the cleaning drainage module is used for receiving mixed liquid with the cleaning liquid output by the cleaning unit;
the concentrated liquid discharging module is used for receiving mixed liquid with concentrated liquid output by the first flow channel.
7. The self-cleaning device of a DTRO high pressure reverse osmosis membrane of claim 6, wherein the waste liquid module further comprises: the flushing backflow module, the flushing pipe and the waste liquid main pipe are arranged;
the input end of the waste liquid header pipe is respectively connected to the circulating unit, and the output end of the waste liquid header pipe is respectively communicated with the flushing reflux module and the concentrated liquid discharge module; the input end of the flushing pipe is communicated with the circulating unit, and the output end of the flushing pipe is communicated with the waste liquid main pipe; and an inlet valve is arranged at the input end of the flushing backflow module.
8. The self-cleaning apparatus of a DTRO high pressure reverse osmosis membrane of claim 7, wherein the input of the waste liquid header pipe and the input of the flush pipe are provided with inlet valves, respectively.
9. The self-purification device of the DTRO high pressure reverse osmosis membrane of any one of claims 1-8, wherein the output ends of the raw water inlet unit and the cleaning unit are respectively provided with an inlet valve, and the inlet valves are in communication connection with each other.
10. The self-purification apparatus of a DTRO high pressure reverse osmosis membrane of claim 9, wherein at least one of the raw water inlet unit, the DTRO treatment unit, the circulation unit, the cleaning unit and the recovery unit is provided with a flow meter; the flow meter is in communication with the inlet valve.
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