Assembly type hemodialysis water treatment system

Abstract

An assembled hemodialysis water treatment system relates to the field of water treatment and comprises a first pump, a sand filter, a softener, a softening / carbon filter, a carbon filter, a security filter, a balancer, a primary reverse osmosis membrane filtering mechanism with a second pump and a secondary reverse osmosis membrane filtering mechanism with a third pump which are sequentially connected in series through pipelines, the sand filter, the softener, the softening / carbon filter and the carbon filter which are connected in series through a pipeline form a first module and are arranged in the first box frame, and the security filter and the balancer which are connected in series through a pipeline form a second module and are arranged in the second box frame; the first-stage reverse osmosis membrane filtering mechanisms which are connected in series through pipelines and are provided with second pumps form a third module and are arranged in a third box frame; and the second-stage reverse osmosis membrane filtering mechanisms which are provided with third pumps form a fourth module and are arranged in a fourth box frame. Compared with the prior art, the invention has the advantages of thorough sterilization and disinfection and effective removal of residual disinfectant.

Description

Technical Field

[0001] The invention relates to the field of water treatment, in particular to an assembled hemodialysis water treatment system. Background Art

[0002] At present, when the hemodialysis water treatment system supplies dialysate (or dialysate concentrate) to each dialyzer, it mainly adopts a large circulation pipeline to connect each dialyzer in series. Due to different usage occasions, the number of dialyzers connected in series is different. Therefore, the water treatment capacity of the hemodialysis water treatment system is different. Various components of the hemodialysis water treatment system in the prior art need to be installed on-site. Due to the different components of the hemodialysis water treatment system with different treatment capacities and the installation environment, the same working process and action cannot be used, and adjustments need to be made according to the site. First, the workload is large. Second, due to the proficiency and sense of responsibility of the on-site workers, the installation quality is difficult to guarantee. Determined by the water treatment technology, the water treatment capacity of each component constituting the water treatment system is different and needs to be matched. However, the water treatment capacity actually required is diverse, which can easily bring great inconvenience to the matching between components and easily cause matching errors. Summary of the invention

[0003] The object of the present invention is to provide an assembled hemodialysis water treatment system which is easy to install and use, and in which the installation quality can be easily guaranteed even if the components of the hemodialysis water treatment systems with different processing capacities are different and the installation environments are different, and in which the matching between the various components is accurate and convenient.

[0004] The assembled hemodialysis water treatment system of the present invention is implemented as follows, including a first pump, a sand filter, a softener, a softening / carbon filter, a carbon filter, a security filter, a balancer (balance water tank), a primary reverse osmosis membrane filtration mechanism with a second pump, and a secondary reverse osmosis membrane filtration mechanism with a third pump, which are sequentially connected in series through pipelines. The sand filter, softener, softening / carbon filter and carbon filter connected in series through pipelines form a first module and are arranged in a first box frame, a first water inlet joint is arranged to be connected to the water inlet of the sand filter, a first water outlet joint is arranged to be connected to the water outlet of the carbon filter, a security filter and a balancer connected in series through pipelines form a second module and are arranged in a second box frame, a second water inlet joint is arranged to be connected to the water inlet of the security filter The first reverse osmosis membrane filtration mechanism comprises more than two first reverse osmosis membrane filtration units, the third water inlet joint is connected to the water inlet of the second pump, the third water outlet joint is connected to the water outlet of the first reverse osmosis membrane filtration mechanism, the second reverse osmosis membrane filtration mechanism comprises more than one second reverse osmosis membrane filtration unit, the fourth water inlet joint is connected to the water inlet of the third pump, and the fourth water outlet joint is connected to the water outlet of the second reverse osmosis membrane filtration mechanism.

[0005] During production, the components constituting the hemodialysis water treatment system are first installed in the corresponding box frame according to the corresponding module combination, and connected with pipelines according to the design requirements. Since it is produced in the factory, it is easy to ensure the production quality; During assembly, it is only necessary to connect the modules in series through water pipes, and then connect the fourth water outlet joint connected to the water outlet of the secondary reverse osmosis membrane filtration mechanism to the pre-laid transmission water pipe for serial connection of the dialysis machine, and connect the return water port of the balancer to the return water end of the pre-laid transmission water pipe for serial connection of the dialysis machine, and the installation of the hemodialysis water treatment system is completed. The on-site assembly is easy and convenient, so the installation workload is small and the installation quality is easy to ensure.

[0006] Preferably, there are more than two third modules and more than two fourth modules. When more than two third modules and fourth modules are used, one of the third modules and one of the fourth modules are connected in series through a water pipe, and then the series-connected third modules and fourth modules are connected in parallel and then connected to the second water outlet joint of the second module. Since the water treatment capacity of the reverse osmosis membrane filtration mechanism constituting the third module and the fourth module is limited, in order to meet the requirement of large water treatment capacity, multiple reverse osmosis membrane filtration mechanisms must be used to perform water treatment at the same time, and the various filters and corresponding components constituting the first module and the second module can meet the requirement of large water treatment capacity. By combining the first module and the second module that can meet the large water treatment capacity with multiple groups of modules connected in series by the third module and the fourth module, a hemodialysis water treatment system with large water treatment capacity can be formed. Since the number of reverse osmosis membrane filtration units constituting each third module and each fourth module can be different, different water treatment capacity requirements can be met through different combinations. Since the number of reverse osmosis membrane filtration units constituting each third module and each fourth module is fixed, the water treatment capacity obtained by different combinations can be determined in advance, thereby facilitating the selection of the correct combination according to the water treatment capacity requirements.

[0007] Preferably, the first-stage reverse osmosis membrane filtration mechanism with a second pump of the third module comprises a second pump and 2-3 first reverse osmosis membrane filtration units; When two first reverse osmosis membrane filter units are used, the water inlet of the first first reverse osmosis membrane filter unit is connected to the water outlet of the second pump, the pure water outlet of the first first reverse osmosis membrane filter unit is connected to the water inlet of the third pump of the fourth module, the water inlet of the second first reverse osmosis membrane filter unit is connected to the wastewater outlet of the first first reverse osmosis membrane filter unit, the pure water outlet of the second first reverse osmosis membrane filter unit is connected to the water inlet of the third pump of the fourth module, and the wastewater outlet of the second first reverse osmosis membrane filter unit is respectively connected to the water inlet of the second pump and discharged through the regulating valve; When three first reverse osmosis membrane filter units are used, the water inlet of the first first reverse osmosis membrane filter unit is connected to the water outlet of the second pump, the pure water outlet of the first first reverse osmosis membrane filter unit is connected to the water inlet of the third pump of the fourth module, the water inlet of the second first reverse osmosis membrane filter unit is connected to the wastewater outlet of the first first reverse osmosis membrane filter unit, the pure water outlet of the second first reverse osmosis membrane filter unit is connected to the water inlet of the third pump of the fourth module, the wastewater outlet of the second first reverse osmosis membrane filter unit is connected to the water inlet of the third first reverse osmosis membrane filter unit, the pure water outlet of the third first reverse osmosis membrane filter unit is connected to the water inlet of the third pump of the fourth module, and the wastewater outlet of the third first reverse osmosis membrane filter unit is respectively connected to the water inlet of the second pump and discharged through the regulating valve.

[0008] By using 2-3 first reverse osmosis membrane filtration units, the latter first reverse osmosis membrane filtration unit treats the wastewater of the former first reverse osmosis membrane filtration unit into primary pure water, which can fully utilize water resources and pre-treated water treatment capacity, and secondly, can significantly increase the output of primary pure water.

[0009] Preferably, the secondary reverse osmosis membrane filtration mechanism with a third pump of the fourth module comprises a third pump and 1-2 second reverse osmosis membrane filtration units; When one second reverse osmosis membrane filtration unit is used, the water inlet of the second reverse osmosis membrane filtration unit is connected to the water outlet of the third pump, the pure water outlet of the second reverse osmosis membrane filtration unit outputs ultrapure water, and the waste water of the second reverse osmosis membrane filtration unit is connected to the water inlet of the third pump; When two second reverse osmosis membrane filtration units are used, the water inlet of the first second reverse osmosis membrane filtration unit is connected to the water outlet of the third pump, the pure water outlet of the first second reverse osmosis membrane filtration unit outputs ultrapure water, the water inlet of the second second reverse osmosis membrane filtration unit is connected to the wastewater outlet of the first second reverse osmosis membrane filtration unit, the pure water outlet of the second second reverse osmosis membrane filtration unit outputs ultrapure water, and the wastewater outlet of the second second reverse osmosis membrane filtration unit is connected to the water inlet of the third pump.

[0010] Since the water entering the second reverse osmosis membrane filtration unit has been filtered by the first reverse osmosis membrane filtration unit, it is already pure water. The waste water of the second reverse osmosis membrane filtration unit has high purity and does not need to be discharged, so as to save water resources; Two second reverse osmosis membrane filtration units are used, and the second second reverse osmosis membrane filtration unit treats the wastewater of the first second reverse osmosis membrane filtration unit into ultrapure water, which can fully utilize water resources and the water treatment capacity of pretreatment, and can significantly increase the output of ultrapure water. Compared with the existing technology, the present invention has the advantages of thorough sterilization and disinfection, and can effectively remove residual disinfectants. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of an assembled hemodialysis water treatment system according to Embodiment 1 of the present invention; Figure 2 This is a schematic structural diagram of an assembled hemodialysis water treatment system according to Embodiment 2 of the present invention; Figure 3 This is a schematic structural diagram of an assembled hemodialysis water treatment system according to Embodiment 3 of the present invention; Figure 4 This is a schematic structural diagram of an assembled hemodialysis water treatment system according to Example 4 of the present invention.

[0012] Explanation of the reference numerals: A-first module; B-second module; C-second module; D-dialysis machine; 1-pipeline; 2-first pump; 3-sand filter; 4-softener; 5-softening / carbon filter; 6-carbon filter; 7-security filter; 8-balancer; 9-second pump; 10-first-stage reverse osmosis membrane filtration mechanism; 1001-first-stage reverse osmosis membrane filtration unit; 1002-regulating valve; 11-third pump; 12-second-stage reverse osmosis membrane filtration mechanism; 1201-second-stage reverse osmosis membrane filtration unit; 1202-drain valve; 13-first water inlet joint; 14-first water outlet joint; 15-second water inlet joint; 16-second water outlet joint; 17-return water joint; 18-third water inlet joint; 19-third water outlet joint; 20-fourth water inlet joint; 21-fourth water outlet joint; 22-transmission water pipe. DETAILED DESCRIPTION

[0013] The assembled hemodialysis water treatment system of the present invention is now described in further detail with reference to the accompanying drawings and embodiments: Example 1: Figure 1As shown, the assembled hemodialysis water treatment system of the present invention is implemented as follows, including a first pump 2, a sand filter 3, a softener 4, a softening / carbon filter 5, a carbon filter 6, a security filter 7, a balancer 8 (balance water tank), a primary reverse osmosis membrane filtration mechanism 10 with a second pump 9, and a secondary reverse osmosis membrane filtration mechanism 12 with a third pump 11, which are sequentially connected together through a pipeline 1. The balancer 8 is provided with a discharge port with a discharge valve. The sand filter 3, the softener 4, the softening / carbon filter 5 and the carbon filter 6 connected in series through the pipeline 1 form a first module A and are arranged in a first box frame. A first water inlet joint 13 is provided to communicate with the water inlet of the sand filter 3, and a first water outlet joint 14 is provided to communicate with the water outlet of the carbon filter 6. The security filter 7 and the balancer 8 connected in series through the pipeline 1 form a second module B and are arranged in a second box frame. A second water inlet joint 15 is provided to communicate with the security filter The water inlet of the balancer 7 is connected, the second water outlet joint 16 is connected to the water outlet of the balancer 8, the return water joint 17 is connected to the return water outlet of the balancer 8, the first-level reverse osmosis membrane filtration mechanism 10 with the second pump 9 connected in series through the pipeline 1 constitutes a third module C and is arranged in the third box frame, the first-level reverse osmosis membrane filtration mechanism 10 includes more than two first reverse osmosis membrane filtration units 1001, the third water inlet joint 18 is connected to the water inlet of the second pump 9, the third water outlet joint 19 is connected to the water outlet of the first-level reverse osmosis membrane filtration mechanism 10, the second-level reverse osmosis membrane filtration mechanism 12 with the third pump 11 constitutes a fourth module D and is arranged in the fourth box frame, the second-level reverse osmosis membrane filtration mechanism 12 includes more than one second reverse osmosis membrane filtration unit 1201, the fourth water inlet joint 20 is connected to the water inlet of the third pump 11, and the fourth water outlet joint 21 is connected to the water outlet of the second-level reverse osmosis membrane filtration mechanism 12.

[0014] The third module C has one set, and the fourth module D has one set.

[0015] Preferably, the first-stage reverse osmosis membrane filtration mechanism 10 with the second pump 9 of the third module C comprises the second pump 9 and two first reverse osmosis membrane filtration units 1001; The water inlet of the first first reverse osmosis membrane filter unit 1001 is connected to the water outlet of the second pump 9, the pure water outlet of the first first reverse osmosis membrane filter unit 1001 is connected to the water inlet of the third pump 11 of the third module C, the water inlet of the second first reverse osmosis membrane filter unit 1001 is connected to the wastewater outlet of the first first reverse osmosis membrane filter unit 1001, the pure water outlet of the second first reverse osmosis membrane filter unit 1001 is connected to the water inlet of the third pump 11 of the third module C, and the wastewater outlet of the second first reverse osmosis membrane filter unit 1001 is respectively connected to the water inlet of the second pump 9 and discharged through the regulating valve 1002; Preferably, the secondary reverse osmosis membrane filtration mechanism 12 with the third pump 11 of the fourth module comprises the third pump 11 and one second reverse osmosis membrane filtration unit 1201; The water inlet of the second reverse osmosis membrane filtration unit 1201 is connected to the water outlet of the third pump 11 , the pure water outlet of the second reverse osmosis membrane filtration unit 1201 outputs ultrapure water, and the wastewater outlet of the second reverse osmosis membrane filtration unit 1201 is connected to the water inlet of the third pump 11 .

[0016] The wastewater outlet of the second reverse osmosis membrane filtration unit 1201 is connected to the drain port through the drain valve 1202 .

[0017] During production, the components constituting the hemodialysis water treatment system are first installed in the corresponding box frame according to the corresponding module combination, and connected with the pipeline 1 according to the design requirements. Since it is produced in the factory, it is easy to ensure the production quality; During assembly, it is only necessary to connect the modules in series through soft water pipes, and then connect the fourth water outlet joint 21 connected to the water outlet of the secondary reverse osmosis membrane filtration mechanism 12 to the pre-laid transmission water pipe 22 for serial connection of the dialyzer E, and the return water joint 17 of the return water outlet of the balancer 8 to the return water end of the pre-laid transmission water pipe 22 for serial connection of the dialyzer D, and the installation of the assembled hemodialysis water treatment system is completed. The on-site assembly is easy and convenient, so the installation workload is small and the installation quality is easy to ensure.

[0018] The first module A of this embodiment cooperates with the second module B using matching filter materials and balancer capacity to produce 2.7 tons of filtered water; The first-stage reverse osmosis membrane filtration mechanism 10 of the third module C of this embodiment can produce 2 tons / hour of pure water; The secondary reverse osmosis membrane filtration mechanism 12 of the fourth module D of this embodiment can produce 1 ton / hour of ultrapure water.

[0019] When disinfecting the system; By turning off the second pump 9 and the third pump 11 and fully opening the regulating valve 1002, the first module and the second module B outside the primary reverse osmosis membrane filtration mechanism 10 with the second pump 9 and the secondary reverse osmosis membrane filtration mechanism 12 with the third pump 11 can be disinfected with disinfectant; By turning on the second pump 9 and the third pump 11, and fully opening the regulating valve 1002 and the drain valve 1202, the first module A, the second module B, the third module C and the fourth module D can be sterilized with high-temperature hot water.

[0020] Example 2: Figure 2 As shown, this embodiment is based on the embodiment 1, and the first-level reverse osmosis membrane filtration mechanism with the second pump of the third module includes the second pump 9 and three first reverse osmosis membrane filtration units 1001; The water inlet of the first first reverse osmosis membrane filtration unit 1001 is connected to the water outlet of the second pump 9, the pure water outlet of the first first reverse osmosis membrane filtration unit 1001 is connected to the water inlet of the third pump 11 of the fourth module D, the water inlet of the second first reverse osmosis membrane filtration unit 1001 is connected to the wastewater outlet of the first first reverse osmosis membrane filtration unit 1001, the pure water outlet of the second first reverse osmosis membrane filtration unit 1001 is connected to the water inlet of the third pump 11 of the fourth module D, the wastewater outlet of the second first reverse osmosis membrane filtration unit 1001 is connected to the water inlet of the third first reverse osmosis membrane filtration unit 1001, the pure water outlet of the third first reverse osmosis membrane filtration unit 1001 is connected to the water inlet of the third pump 11 of the fourth module D, and the wastewater outlet of the third first reverse osmosis membrane filtration unit 1001 is respectively connected to the water inlet of the second pump 9 and discharged through the regulating valve 1002. The secondary reverse osmosis membrane filtration mechanism 12 with the third pump 11 of the fourth module D includes the third pump 11 and two second reverse osmosis membrane filtration units 1201; The water inlet of the first second reverse osmosis membrane filtration unit 1201 is connected to the water outlet of the third pump 11, the pure water outlet of the first second reverse osmosis membrane filtration unit 1201 outputs ultrapure water, the water inlet of the second second reverse osmosis membrane filtration unit 1201 is connected to the wastewater outlet of the first second reverse osmosis membrane filtration unit 1201, the pure water outlet of the second second reverse osmosis membrane filtration unit 1201 outputs ultrapure water, and the wastewater outlet of the second second reverse osmosis membrane filtration unit 1201 is connected to the water inlet of the third pump 11.

[0021] The wastewater outlet of the second second reverse osmosis membrane filtration unit 1201 is connected to the drain port through the drain valve 1202 .

[0022] The first module A of this embodiment cooperates with the second module B using matching filter materials and balancer capacity to produce 4 tons of filtered water; The first-stage reverse osmosis membrane filtration mechanism 10 of the third module C of this embodiment can produce 3 tons / hour of pure water; The secondary reverse osmosis membrane filtration mechanism 12 of the fourth module D of this embodiment can produce 2 tons / hour of ultrapure water.

[0023] When disinfecting the system; By turning off the second pump 9 and the third pump 11 and fully opening the regulating valve 1002, the first module and the second module B outside the primary reverse osmosis membrane filtration mechanism 10 with the second pump 9 and the secondary reverse osmosis membrane filtration mechanism 12 with the third pump 11 can be disinfected with disinfectant; By turning on the second pump 9 and the third pump 11, and fully opening the regulating valve 1002 and the drain valve 1202, the first module A, the second module B, the third module C and the fourth module D can be sterilized with high-temperature hot water.

[0024] Embodiment 3, as Figure 3 As shown, this embodiment is based on embodiments 1 and 2, and a set of the third module C and the fourth module D of embodiment 1 and a set of the third module C and the fourth module D of embodiment 2 are connected in parallel, and the water inlet end is connected to the water outlet end of the second module B, and the water outlet end is connected to the transmission water pipe 22.

[0025] The first module A of this embodiment cooperates with the second module B using matching filter materials and balancer capacity to produce 6.7 tons of filtered water; A set of the third module C and the fourth module D of Example 1 connected in parallel can produce 1 ton / hour of ultrapure water, and a set of the third module C and the fourth module D of Example 2 can produce 2 tons / hour of ultrapure water.

[0026] During assembly, the first module A is connected in series with the second module B through a soft water pipe, the second module B is connected in series with a set of third module C and fourth module D in parallel of Example 1 and a set of third module C and fourth module D in Example 2 through a three-way soft water pipe, the soft water pipe is connected to a set of third module C and fourth module D in Example 1 and a set of third module C and fourth module D in Example 2, and then, after the three-way connection, it is connected to the pre-arranged transmission water pipe 22 for serial connection of the dialysis machine D, the return water joint 17 of the return water port of the balancer 8 is connected to the return water end of the pre-arranged transmission water pipe 22 for serial connection of the dialysis machine D, and the installation of the assembled hemodialysis water treatment system is completed.

[0027] After installation, the assembled hemodialysis water treatment system of this embodiment can produce 3 tons / hour of ultrapure water.

[0028] Embodiment 4, as Figure 4 As shown, this embodiment is based on the embodiment 2, and the third module C and the fourth module D of the embodiment 2 have two sets.

[0029] The first module A of this embodiment cooperates with the second module B using matching filter materials and balancer capacity to produce 8 tons of filtered water; Each set of the third module C and the fourth module D of Example 2 can produce 2 tons / hour of ultrapure water.

[0030] During assembly, the first module A is connected in series with the second module B through a soft water pipe, the second module B is connected in series with the third module C and the fourth module D of the two sets of parallel embodiments 2 through a three-way soft water pipe, the soft water pipe is connected to the fourth water outlet connector 21 of the water outlet of the fourth module D of the two sets of embodiments 2, and then, after the three-way connection, it is connected to the pre-arranged transmission water pipe 22 for serial connection of the dialysis machine D, and the return water connector 17 of the return water outlet of the balancer 8 is connected to the return water end of the pre-arranged transmission water pipe 20 for serial connection of the dialysis machine D, and the installation of the assembled hemodialysis water treatment system is completed.

[0031] After installation, the assembled hemodialysis water treatment system of this embodiment can produce 43 tons / hour of ultrapure water.

Claims

1. An assembled hemodialysis water treatment system, comprising a first pump, a sand filter, a softener, a softening / carbon filter, a carbon filter, a security filter, a balancer, a primary reverse osmosis membrane filtration mechanism with a second pump, and a secondary reverse osmosis membrane filtration mechanism with a third pump, which are sequentially connected in series through a pipeline, characterized in that: The sand filter, softener, softener / carbon filter and carbon filter connected in series by pipelines form a first module and are arranged in a first box frame. A first water inlet joint is arranged to communicate with the water inlet of the sand filter, and a first water outlet joint is arranged to communicate with the water outlet of the carbon filter. The security filter and balancer connected in series by pipelines form a second module and are arranged in a second box frame. A second water inlet joint is arranged to communicate with the water inlet of the security filter, a second water outlet joint is arranged to communicate with the water outlet of the balancer, and a return water joint is arranged to communicate with the return water outlet of the balancer. A first stage with a second pump connected in series by pipelines The reverse osmosis membrane filtration mechanism constitutes a third module and is arranged in a third box frame, the first-level reverse osmosis membrane filtration mechanism includes more than two first reverse osmosis membrane filtration units, a third water inlet joint is arranged to be connected to the water inlet of the second pump, and a third water outlet joint is arranged to be connected to the water outlet of the first-level reverse osmosis membrane filtration mechanism, and the second-level reverse osmosis membrane filtration mechanism with the third pump constitutes a fourth module and is arranged in a fourth box frame, the second-level reverse osmosis membrane filtration mechanism includes more than one second reverse osmosis membrane filtration unit, a fourth water inlet joint is arranged to be connected to the water inlet of the third pump, and a fourth water outlet joint is arranged to be connected to the water outlet of the second-level reverse osmosis membrane filtration mechanism; During production, the components constituting the hemodialysis water treatment system are first installed in the corresponding box frame according to the corresponding module combination, and connected with pipelines according to the design requirements; During assembly, you only need to connect the modules in series through water pipes, and then connect the fourth water outlet joint connected to the water outlet of the secondary reverse osmosis membrane filtration mechanism to the pre-laid transmission water pipe for serially connecting the dialysis machine, and connect the return water port of the balancer to the return water end of the pre-laid transmission water pipe for serially connecting the dialysis machine, and the installation of the assembled hemodialysis water treatment system is completed.

2. The assembled hemodialysis water treatment system according to claim 1, characterized in that: There are more than two third modules and more than two fourth modules. When more than two third modules and fourth modules are used, one of the third modules and one of the fourth modules are connected in series through a water pipe, and then the series-connected third modules and fourth modules are connected in parallel and then connected to the second water outlet joint of the second module.

3. The assembled hemodialysis water treatment system according to claim 1 or 2, characterized in that: The first-stage reverse osmosis membrane filtration mechanism with a second pump of the third module includes a second pump and 2-3 first reverse osmosis membrane filtration units; When two first reverse osmosis membrane filter units are used, the water inlet of the first first reverse osmosis membrane filter unit is connected to the water outlet of the second pump, the pure water outlet of the first first reverse osmosis membrane filter unit is connected to the water inlet of the third pump of the fourth module, the water inlet of the second first reverse osmosis membrane filter unit is connected to the wastewater outlet of the first first reverse osmosis membrane filter unit, the pure water outlet of the second first reverse osmosis membrane filter unit is connected to the water inlet of the third pump of the fourth module, and the wastewater outlet of the second first reverse osmosis membrane filter unit is respectively connected to the water inlet of the second pump and discharged through the regulating valve; When three first reverse osmosis membrane filter units are used, the water inlet of the first first reverse osmosis membrane filter unit is connected to the water outlet of the second pump, the pure water outlet of the first first reverse osmosis membrane filter unit is connected to the water inlet of the third pump of the fourth module, the water inlet of the second first reverse osmosis membrane filter unit is connected to the wastewater outlet of the first first reverse osmosis membrane filter unit, the pure water outlet of the second first reverse osmosis membrane filter unit is connected to the water inlet of the third pump of the fourth module, the wastewater outlet of the second first reverse osmosis membrane filter unit is connected to the water inlet of the third first reverse osmosis membrane filter unit, the pure water outlet of the third first reverse osmosis membrane filter unit is connected to the water inlet of the third pump of the fourth module, and the wastewater outlet of the third first reverse osmosis membrane filter unit is respectively connected to the water inlet of the second pump and discharged through the regulating valve.

4. The assembled hemodialysis water treatment system according to claim 3, characterized in that: The secondary reverse osmosis membrane filtration mechanism with the third pump of the fourth module comprises the third pump and 1-2 second reverse osmosis membrane filtration units; When one second reverse osmosis membrane filtration unit is used, the water inlet of the second reverse osmosis membrane filtration unit is connected to the water outlet of the third pump, the pure water outlet of the second reverse osmosis membrane filtration unit outputs ultrapure water, and the waste water of the second reverse osmosis membrane filtration unit is connected to the water inlet of the third pump; When two second reverse osmosis membrane filtration units are used, the water inlet of the first second reverse osmosis membrane filtration unit is connected to the water outlet of the third pump, the pure water outlet of the first second reverse osmosis membrane filtration unit outputs ultrapure water, the water inlet of the second second reverse osmosis membrane filtration unit is connected to the wastewater outlet of the first second reverse osmosis membrane filtration unit, the pure water outlet of the second second reverse osmosis membrane filtration unit outputs ultrapure water, and the wastewater outlet of the second second reverse osmosis membrane filtration unit is connected to the water inlet of the third pump.

5. The assembled hemodialysis water treatment system according to claim 4, characterized in that: There is one set for the third module and one set for the fourth module; The first-stage reverse osmosis membrane filtration mechanism with a second pump of the third module includes a second pump and two first reverse osmosis membrane filtration units; The secondary reverse osmosis membrane filtration mechanism with the third pump of the fourth module comprises the third pump and one second reverse osmosis membrane filtration unit.

6. The assembled hemodialysis water treatment system according to claim 4, characterized in that: There is one set for the third module and one set for the fourth module; The first-stage reverse osmosis membrane filtration mechanism with a second pump of the third module includes a second pump and three first reverse osmosis membrane filtration units; The secondary reverse osmosis membrane filtration mechanism with the third pump of the fourth module comprises the third pump and two second reverse osmosis membrane filtration units.

7. The assembled hemodialysis water treatment system according to claim 4, characterized in that: The third module and the fourth module each have two groups; One set of the first-stage reverse osmosis membrane filtration mechanism with the second pump of the third module includes the second pump and two first reverse osmosis membrane filtration units, and one set of the first-stage reverse osmosis membrane filtration mechanism with the third pump of the fourth module includes the third pump and one second reverse osmosis membrane filtration unit; Another set of the first-stage reverse osmosis membrane filtration mechanism with the second pump of the third module includes the second pump and three first reverse osmosis membrane filtration units, and another set of the first-stage reverse osmosis membrane filtration mechanism with the third pump of the fourth module includes the third pump and two second reverse osmosis membrane filtration units; After one set of the third modules and one set of the fourth modules are connected in series and then in parallel with another set of the third modules and another set of the fourth modules, the water inlet is connected to the water outlet of the second module, and the water outlet is connected to the transmission water pipe.

8. The assembled hemodialysis water treatment system according to claim 4, characterized in that: The third module and the fourth module each have two groups; The first-stage reverse osmosis membrane filtration mechanism with the second pump of each third module includes the second pump and three first reverse osmosis membrane filtration units, and the first-stage reverse osmosis membrane filtration mechanism with the third pump of each fourth module includes the third pump and two second reverse osmosis membrane filtration units; After one set of the third modules and one set of the fourth modules are connected in series and then in parallel with another set of the third modules and another set of the fourth modules, the water inlet is connected to the water outlet of the second module, and the water outlet is connected to the transmission water pipe.

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