Water treatment equipment and hemodialysis system

Abstract

The present disclosure provides a water treatment device and a hemodialysis system. The water treatment device includes: a primary reverse osmosis component, including a primary water inlet, a primary concentrated water outlet and a primary pure water outlet; a primary water inlet pipeline connected to the primary water inlet; a primary water inlet booster pump, arranged in the primary water inlet pipeline; a primary waste discharge pipeline connected to the primary concentrated water outlet; a primary concentrated water return pipeline connecting the primary concentrated water outlet and the primary water inlet; a secondary reverse osmosis component, including a secondary water inlet, a secondary concentrated water outlet and a secondary pure water outlet; a secondary water inlet pipeline connecting the primary pure water outlet and the secondary water inlet; a secondary water inlet booster pump, arranged in the secondary water inlet pipeline; a secondary concentrated water return pipeline connecting the secondary concentrated water outlet and the secondary water inlet and connecting the secondary concentrated water outlet and the primary water inlet; a rear-stage water supply pipeline, used to connect with the water-using equipment and connect the secondary pure water outlet with the primary water inlet pipeline.

Description

Technical Field

[0001] The present disclosure relates to the technical field of water treatment, and in particular to a water treatment device and a hemodialysis system. Background Art

[0002] Hemodialysis is one of the renal replacement therapies used for patients with acute and chronic renal failure. During hemodialysis, the patient's blood is drained from the body and passed through a dialyzer containing a large number of hollow fibers for blood purification. The purified blood is then returned to the patient. Hemodialysis can achieve the therapeutic goal of removing metabolic waste and excess water from the body and maintaining electrolyte and acid-base balance. In the dialyzer, blood flows within the hollow fibers, while dialysate flows outside the hollow fibers in the opposite direction. The blood and dialysate exchange substances through diffusion, ultrafiltration, adsorption, and convection, thereby purifying the blood.

[0003] Dialysate is typically prepared by diluting a dialysate concentrate containing electrolytes and bases with pure water in a proportional manner. Its electrolyte concentration approximates that found in normal blood. Because city tap water contains a variety of trace elements, particularly heavy metals, as well as disinfectants, endotoxins, and bacteria, it requires water treatment equipment and a series of water treatment processes to produce pure water for dilution.

[0004] In related technologies, water treatment equipment uses water tanks to supply water. There is a dead space in the water tank, that is, a spatial area where water fluidity is poor or even does not flow. This not only increases the risk of bacterial invasion and breeding, but also increases the difficulty of disinfection and flushing, which may lead to incomplete disinfection and flushing. Therefore, the water treatment and purification effect is not ideal. Summary of the Invention

[0005] The embodiments of the present disclosure provide a water treatment device and a hemodialysis system to reduce the risk of bacteria invading and multiplying inside the water treatment device, reduce the difficulty of disinfecting and flushing the water treatment device, and thus improve the effect of water treatment and purification.

[0006] According to one aspect of an embodiment of the present disclosure, there is provided a water treatment device, comprising:

[0007] A first-stage reverse osmosis component, including a first-stage water inlet, a first-stage concentrated water outlet, and a first-stage pure water outlet;

[0008] A first-level water inlet pipeline connected to the first-level water inlet;

[0009] The first-stage water inlet booster pump is installed on the first-stage water inlet pipeline;

[0010] The first-stage waste discharge pipeline is connected to the first-stage concentrated water outlet;

[0011] The first-stage concentrated water return pipe connects the first-stage concentrated water outlet with the first-stage water inlet;

[0012] A two-stage reverse osmosis component, including a two-stage water inlet, a two-stage concentrated water outlet, and a two-stage pure water outlet;

[0013] The secondary water inlet pipeline connects the primary pure water outlet with the secondary water inlet;

[0014] The secondary water inlet booster pump is installed on the secondary water inlet pipeline;

[0015] The secondary concentrated water return pipeline connects the secondary concentrated water outlet with the secondary water inlet, and connects the secondary concentrated water outlet with the primary water inlet;

[0016] The rear-stage water supply pipeline is used to connect with the water-using equipment and connect the secondary pure water outlet with the primary water inlet pipeline.

[0017] In some embodiments, the water treatment device further comprises:

[0018] A three-way valve, including a bypass valve port, and an inlet valve port and an outlet valve port connected to the primary inlet pipe; and

[0019] Short-circuit the bypass and connect the bypass valve port to the secondary water inlet pipe.

[0020] In some embodiments, the water treatment device further comprises:

[0021] The first-stage return water booster pump is installed on the first-stage concentrated water return pipeline.

[0022] In some embodiments, the water treatment device further comprises:

[0023] A first pressure detection device, a first on-off valve, a first flowmeter, a first conductivity meter, a first pressure switch, a second pressure detection device are provided on the first-stage water inlet pipeline and are sequentially arranged in a direction close to the first-stage water inlet, and a first bypass on-off valve is provided in parallel with the first on-off valve, wherein the water inlet valve port and the water outlet valve port are located between the first flowmeter and the first conductivity meter, the first-stage water inlet booster pump is located between the first pressure switch and the second pressure detection device, the first-stage concentrated water return pipeline is connected to the portion of the first-stage water inlet pipeline located between the second pressure detection device and the first-stage water inlet, and the rear-stage water supply pipeline is connected to the portion of the first-stage water inlet pipeline located between the first flowmeter and the water inlet valve port;

[0024] A third pressure detection device, a first regulating valve, a second switch valve and a second conductivity meter are arranged on the primary exhaust pipeline, as well as a second bypass switch valve and a second regulating valve which are connected in series and in parallel with the first regulating valve.

[0025] In some embodiments, the water treatment equipment further includes: a fourth pressure detection device and a second pressure switch provided on the secondary water inlet pipeline and located between the primary pure water outlet and the secondary water inlet booster pump, a first sampling branch connected to the secondary water inlet pipeline, and a third switch valve provided on the first sampling branch; and / or an overflow branch connected to the secondary pure water outlet, an overflow valve and a fourth switch valve provided on the overflow branch; and / or

[0026] The secondary concentrated water return pipeline includes a secondary concentrated water return main line connected to the secondary concentrated water outlet, a secondary concentrated water return first branch connected to the secondary concentrated water return main line and connected to the secondary water inlet pipeline, and a secondary concentrated water return second branch connected to the secondary concentrated water return main line and connected to the primary water inlet pipeline, a fifth pressure detection device and a third regulating valve arranged on the secondary concentrated water return main line, and a fourth regulating valve arranged on the secondary concentrated water return first branch, wherein the secondary concentrated water return first branch is connected to the part of the secondary water inlet pipeline located between the primary pure water outlet and the second pressure switch, and the secondary concentrated water return second branch is connected to the part of the primary water inlet pipeline located between the three-way valve and the first conductivity meter.

[0027] In some embodiments, the water treatment device further comprises:

[0028] a third conductivity meter, a sixth pressure detection device, a second flow meter, and a seventh pressure detection device provided on the rear-stage water supply pipeline and located between the secondary pure water outlet and the water-using equipment; a disinfectant supply branch and a second sampling branch respectively connected to the portion of the rear-stage water supply pipeline located between the secondary pure water outlet and the water-using equipment; a fifth on-off valve provided on the disinfectant supply branch; and a sixth on-off valve provided on the second sampling branch; and

[0029] an eighth pressure detecting device and a third flow meter provided on the rear-stage water supply pipeline and located between the water-using equipment and the primary water inlet pipeline, a third sampling branch and a rear-stage waste discharge branch respectively connected to the portion of the rear-stage water supply pipeline located between the water-using equipment and the primary water inlet pipeline, a seventh switch valve provided on the third sampling branch, and an eighth switch valve provided on the rear-stage waste discharge branch.

[0030] In some embodiments, the operating modes of the water treatment equipment include a water treatment operating mode, a fault operating mode, a power-on flushing operating mode, and a disinfection flushing operating mode, wherein:

[0031] In the water treatment working mode, the first switch valve is opened, the water inlet valve port and the water outlet valve port of the three-way valve are opened, the bypass valve port of the three-way valve is closed, the first-stage water inlet booster pump, the first-stage return water booster pump and the second-stage water inlet booster pump are opened, the first regulating valve and the second switch valve are opened, the second bypass switch valve is closed, the third regulating valve and the fourth regulating valve are opened, and the fifth switch valve is closed;

[0032] In the fault working mode, the first switch valve is open, the water inlet valve port and the bypass valve port of the three-way valve are open, the water outlet valve port of the three-way valve is closed, the first-stage water inlet booster pump and the first-stage return water booster pump are closed, the second-stage water inlet booster pump is opened, the first regulating valve and the second switch valve are opened, the second bypass switch valve is closed, the third regulating valve is opened, the fourth regulating valve is closed, and the fifth switch valve is closed;

[0033] In the power-on flushing mode, the first switch valve is opened, the water inlet valve port and the water outlet valve port of the three-way valve are opened, the bypass valve port of the three-way valve is closed, the first-stage water inlet booster pump, the first-stage return water booster pump and the second-stage water inlet booster pump are turned on, the first regulating valve and the second switch valve are opened, the second bypass switch valve and the second regulating valve are opened, the third regulating valve and the fourth regulating valve are opened, and the fifth switch valve is closed;

[0034] In the disinfection and flushing working mode, within the first set time period, the first switch valve is opened, the water inlet valve port and the water outlet valve port of the three-way valve are opened, the bypass valve port of the three-way valve is closed, the first-level water inlet booster pump, the first-level return water booster pump and the second-level water inlet booster pump are closed, the second switch valve is closed, the second bypass switch valve is closed, the third regulating valve and the fourth regulating valve are opened, and the fifth switch valve is opened; within the second set time period after the first set time period, the first switch valve is closed, the water inlet valve port and the water outlet valve port of the three-way valve are opened, the bypass valve port of the three-way valve is closed, the first-level water inlet booster pump, the first-level return water booster pump and the second-level water inlet booster pump are opened, the second switch valve is closed, the second bypass switch valve is closed, the third regulating valve and the fourth regulating valve are opened, and the fifth switch valve is closed; within the third set time period after the second set time period, the first switch valve is closed, the water inlet valve port and the bypass valve port of the three-way valve are opened, the water outlet valve port of the three-way valve is closed, the first-level water inlet booster pump and the first-level return water booster pump are closed, the second The water booster pump is turned on, the second switch valve is closed, the second bypass switch valve is closed, the third regulating valve is turned on, the fourth regulating valve is closed, and the fifth switch valve is closed; in the fourth set time period after the third set time period, the first switch valve is turned on, the water inlet valve port and the water outlet valve port of the three-way valve are opened, the bypass valve port of the three-way valve is closed, the first-level water inlet booster pump, the first-level return water booster pump and the second-level water inlet booster pump are turned on, the first regulating valve and the second switch valve are turned on, the second bypass switch valve and the second regulating valve are turned on, the third regulating valve and the fourth regulating valve are turned on, and the fifth switch valve is closed; in the fifth set time period after the fourth set time period, the first switch valve is turned on, the water inlet valve port and the bypass valve port of the three-way valve are opened, the water outlet valve port of the three-way valve is closed, the first-level water inlet booster pump and the first-level return water booster pump are closed, the second-level water inlet booster pump is turned on, the first regulating valve and the second switch valve are turned on, the second bypass switch valve and the second regulating valve are turned on, the third regulating valve is turned on, the fourth regulating valve is closed, and the fifth switch valve is closed.

[0035] In some embodiments, the primary water inlet booster pump, the primary water return booster pump, and the secondary water inlet booster pump are submersible pumps respectively; and / or

[0036] The three-way valve is a three-way ball valve; and / or the first regulating valve, the second regulating valve, the third regulating valve and the fourth regulating valve are respectively diaphragm valves; and / or the first switch valve is a ball valve, the second bypass switch valve is a solenoid valve, and the first bypass switch valve, the second switch valve, the third switch valve, the fourth switch valve, the fifth switch valve, the sixth switch valve, the seventh switch valve and the eighth switch valve are respectively ball valves; and / or

[0037] The first flowmeter, the second flowmeter and the third flowmeter are rotor flowmeters respectively.

[0038] In some embodiments, the first-stage reverse osmosis component and the second-stage reverse osmosis component respectively include one or multiple reverse osmosis units arranged in parallel, each reverse osmosis unit includes a membrane shell, a filter core located in the membrane shell, and a water outlet pipe located at the central axis of the filter core, wherein a water inlet is provided on one side of the membrane shell and a water outlet is provided on the other side of the membrane shell; when there are multiple reverse osmosis units, the multiple reverse osmosis units are arranged in sequence, and in two adjacent reverse osmosis units, the water outlet of the membrane shell of one reverse osmosis unit is connected to the water inlet of the membrane shell of the other reverse osmosis unit through a guide pipe.

[0039] According to another aspect of the embodiments of the present disclosure, a hemodialysis system is provided, comprising the water treatment equipment described in any of the aforementioned technical solutions.

[0040] The water treatment equipment of the above-mentioned embodiment of the present disclosure can be directly connected to the softened water supply pipeline of the tap water pretreatment equipment when in use. After passing through the water treatment equipment, the softened water is supplied to the water-using equipment to meet the purification requirements. This pure water can be used as water for dialysate dilution. Compared with related technologies, because the water treatment equipment adopts a water tankless design, the softened water is directly supplied to the reverse osmosis component through the booster pump. This is equivalent to eliminating the dead cavity point of the equipment where water is easily stored. Therefore, it can effectively reduce the risk of bacteria invading and breeding inside the water treatment equipment, reduce the difficulty of disinfecting and flushing the water treatment equipment, and thus improve the effect of water treatment and purification.

[0041] Of course, the product or method of any embodiment of the present disclosure does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present disclosure or related technologies. Obviously, the drawings described below are only some embodiments of the present disclosure. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0043] Figure 1A schematic diagram of a water treatment device according to some embodiments of the present disclosure;

[0044] Figure 2 This is a schematic diagram of a water treatment device in some embodiments of the present disclosure in a water treatment working mode;

[0045] Figure 3 This is a schematic diagram of a water treatment device in some embodiments of the present disclosure in a faulty working mode;

[0046] Figure 4 This is a schematic diagram of a water treatment device in some embodiments of the present disclosure in a power-on flushing mode;

[0047] Figure 5a This is a schematic diagram of a water treatment device in some embodiments of the present disclosure in a first set time period in a disinfection and flushing working mode;

[0048] Figure 5b This is a schematic diagram of a water treatment device in some embodiments of the present disclosure in a second set time period in a disinfection and flushing working mode;

[0049] Figure 5c This is a schematic diagram of the water treatment equipment in some embodiments of the present disclosure when it is in the third set time period of the disinfection and flushing working mode;

[0050] Figure 5d This is a schematic diagram of a water treatment device in some embodiments of the present disclosure in a fourth set time period in a disinfection and flushing working mode;

[0051] Figure 5e This is a schematic diagram of the water treatment equipment in some embodiments of the present disclosure when it is in the fifth set time period of the disinfection and flushing working mode;

[0052] Figure 6 Schematic diagram of a primary reverse osmosis membrane group or a secondary reverse osmosis membrane group in some embodiments of the present disclosure. DETAILED DESCRIPTION

[0053] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present disclosure.

[0054] In a related technology, water treatment equipment that performs reverse osmosis purification on soft water uses a water tank as its water supply. Dead spaces within the tanks—areas where water cannot easily flow—not only increase the risk of bacteria invading and multiplying within the water treatment equipment, but also complicate disinfection and flushing, potentially resulting in incomplete disinfection and flushing. Consequently, the water purification effect of this water treatment equipment is less than ideal. Furthermore, the water treatment equipment comprises two-stage reverse osmosis modules, each with a vertical booster pump, which produces significant noise pollution during operation.

[0055] The embodiments of the present disclosure provide a water treatment device and a hemodialysis system to reduce the risk of bacteria invading and multiplying inside the water treatment device, reduce the difficulty of disinfecting and flushing the water treatment device, and improve the effect of water treatment and purification.

[0056] like Figure 1 As shown, the water treatment equipment provided by the embodiment of the present disclosure includes:

[0057] The first-stage reverse osmosis component 101 includes a first-stage water inlet 101A, a first-stage concentrated water outlet 101B, and a first-stage pure water outlet 101C;

[0058] The primary water inlet pipe 102 is connected to the primary water inlet 101A;

[0059] The first-stage water inlet booster pump M-2 is installed on the first-stage water inlet pipeline 102;

[0060] The first-stage waste discharge pipe 103 is connected to the first-stage concentrated water outlet 101B;

[0061] The primary concentrated water return pipe 104 connects the primary concentrated water outlet 101B with the primary concentrated water inlet 101A;

[0062] The secondary reverse osmosis component 201 includes a secondary water inlet 201A, a secondary concentrated water outlet 201B, and a secondary pure water outlet 201C;

[0063] The secondary water inlet pipe 202 connects the primary pure water outlet 101C with the secondary water inlet 201A;

[0064] The secondary water inlet booster pump M-3 is installed on the secondary water inlet pipeline 202;

[0065] The secondary concentrated water return pipe 203 connects the secondary concentrated water outlet 201B with the secondary water inlet 201A, and connects the secondary concentrated water outlet 201B with the primary water inlet 101A;

[0066] The rear-stage water supply pipeline 204 is used to connect with the water-using equipment and connect the secondary pure water outlet 201C with the primary water inlet pipeline 102.

[0067] The water treatment equipment of the above-mentioned embodiment of the present disclosure can be directly connected to the softened water supply pipeline of the tap water pretreatment equipment when in use. After passing through the water treatment equipment, the softened water is supplied to the water-using equipment to meet the purification requirements. This pure water can be used as water for dialysate dilution. Compared with related technologies, because the water treatment equipment adopts a water tankless design, the softened water is directly supplied to the reverse osmosis component through the booster pump. This is equivalent to eliminating the dead cavity point of the equipment where water is easily stored. Therefore, it can effectively reduce the risk of bacteria invading and breeding inside the water treatment equipment, reduce the difficulty of disinfecting and flushing the water treatment equipment, and thus improve the effect of water treatment and purification.

[0068] In this embodiment, the water treatment equipment further includes: a three-way valve GV01, including a bypass valve port 1, as well as an inlet valve port 3 and an outlet valve port 2 connected to the primary water inlet pipeline 102; a short-circuit bypass port 206, connecting the bypass valve port 1 to the secondary water inlet pipeline 202; and a primary return water booster pump M-4 provided on the primary brine return pipeline 104. The primary return water booster pump M-4, provided on the primary brine return pipeline 104, circulates the brine from the primary reverse osmosis module 101 at high speed and reflows it back into the primary reverse osmosis module 101, thereby reducing the risk of calcification in the primary reverse osmosis module 101 and extending the service life of the reverse osmosis module.

[0069] In some embodiments, as Figure 1As shown, the water treatment equipment also includes: a first pressure detection device YT01, a first switch valve DV01, a first flowmeter RF01, a first conductivity meter CT01, a first pressure switch PS02 and a second pressure detection device P07, which are arranged on the first-level water inlet pipeline 102 and in sequence along the direction close to the first-level water inlet 101A, and a first bypass switch valve MV12 arranged in parallel with the first switch valve DV01, wherein the water inlet valve port 3 and the water outlet valve port 2 of the three-way valve GV01 are located between the first flowmeter RF01 and the first conductivity meter CT01, the first-level water inlet booster pump M-2 is located between the first pressure switch PS02 and the second pressure detection device P07, and the first-level concentrated water return pipeline 104 and the first-level water inlet pipeline 102 are located at the second pressure detection device. The part between P07 and the first-level water inlet 101A is connected, and the rear-stage water supply pipeline 204 is connected to the part of the first-level water inlet pipeline 102 located between the first flowmeter RF01 and the water inlet valve port 3; and the third pressure detection device PT01, the first regulating valve NV01, the second switch valve MV11 and the second conductivity meter CT03 are arranged on the first-level waste discharge pipeline 103, and the second bypass switch valve SV01 and the second regulating valve NV02 are arranged in parallel with the first regulating valve NV01 after being connected in series. The arrangement order of the first regulating valve NV01 and the second switch valve MV11 on the first-level waste discharge pipeline 103 is not limited, for example, they are arranged in sequence in the direction away from the first-level concentrated water outlet 101B, or they are arranged in sequence in the direction close to the first-level concentrated water outlet 101B.

[0070] First bypass valve MV12 is connected in parallel with first valve DV01 through a bypass design. If first valve DV01 fails, first bypass valve MV12 is activated, allowing softened water to continue flowing to the water treatment equipment, thereby ensuring continuous and timely water supply. First bypass valve MV12 is, for example, a manual valve.

[0071] In this embodiment, the water treatment equipment further includes: a fourth pressure detection device P08 and a second pressure switch PS03 provided on the secondary water inlet pipeline 202 and located between the primary pure water outlet 101C and the secondary water inlet booster pump M-3; a first sampling branch connected to the secondary water inlet pipeline 202, and a third switch valve QV04 provided on the first sampling branch; an overflow branch 207 connected to the secondary pure water outlet 201C, an overflow valve UV01 and a fourth switch valve GV04 provided on the overflow branch 207; a secondary concentrated water return pipeline 203 including a secondary concentrated water return main line 203A connected to the secondary concentrated water outlet 201B, a secondary concentrated water return main line 203A connected to the secondary concentrated water return main line 203A and connected to the secondary water inlet pipeline 202 The secondary concentrated water return first branch 203B, and the secondary concentrated water return second branch 203C connected to the secondary concentrated water return main line 203A and connected to the primary water inlet pipeline 102, the fifth pressure detection device P10 and the third regulating valve NV03 provided on the secondary concentrated water return main line 203A, and the fourth regulating valve NV05 provided on the secondary concentrated water return first branch 203B, wherein the secondary concentrated water return first branch 203B is connected to the part of the secondary water inlet pipeline 202 located between the primary pure water outlet 101C and the second pressure switch PS03, and the secondary concentrated water return second branch 203C is connected to the part of the primary water inlet pipeline 102 located between the three-way valve GV01 and the first conductivity meter CT01. The order in which the overflow valve UV01 and the fourth switch valve GV04 are arranged on the overflow branch 207 is not limited, for example, they can be arranged in sequence in a direction away from the secondary pure water outlet 201C, or in a direction close to the secondary pure water outlet 201C.

[0072] In this embodiment, the water treatment equipment further includes: a third conductivity meter CT02, a sixth pressure detection device P11, a second flow meter RF02, and a seventh pressure detection device PT02, which are provided on the rear-stage water supply pipeline 204 and located between the secondary pure water outlet 201C and the water-using equipment; a disinfectant supply branch and a second sampling branch respectively connected to the portion of the rear-stage water supply pipeline 204 located between the secondary pure water outlet 201C and the water-using equipment; and a fifth switch valve MV1 provided on the disinfectant supply branch. 0, and the sixth switch valve QV05 provided on the second sampling branch; the eighth pressure detecting device P12 and the third flowmeter RF03 provided on the rear-stage water supply pipeline 204 and located between the water-using equipment and the primary water inlet pipeline 102, the third sampling branch and the rear-stage waste discharge branch respectively connected to the portion of the rear-stage water supply pipeline 204 located between the water-using equipment and the primary water inlet pipeline 102, the seventh switch valve QV06 provided on the third sampling branch and the eighth switch valve MV13 provided on the rear-stage waste discharge branch.

[0073] Understandably, Figure 1The pipeline connection points shown in the figure, the first-level water inlet 101A, the first-level concentrated water outlet 101B and the first-level pure water outlet 101C of the first-level reverse osmosis component 101, and the second-level water inlet 201A, the second-level concentrated water outlet 201B and the second-level pure water outlet 201C of the second-level reverse osmosis component 201 are drawn schematically and do not represent the actual positions. They can be adjusted according to design requirements under the premise that the pressure remains unchanged.

[0074] In some embodiments of the present disclosure, the first-stage water inlet booster pump M-2, the first-stage return water booster pump M-4, and the second-stage water inlet booster pump M-3 are submersible pumps respectively.

[0075] In the disclosed embodiments, the specific types of the valve components are not limited. The three-way valve GV01 is, for example, a three-way ball valve; the first regulating valve NV01, the second regulating valve NV02, the third regulating valve NV03, and the fourth regulating valve NV04 are, for example, diaphragm valves; the first on-off valve DV01 is, for example, a ball valve; the second bypass on-off valve SV01 is, for example, a solenoid valve; and the first bypass on-off valve MV12, the second on-off valve MV11, the third on-off valve QV04, the fourth on-off valve GV04, the fifth on-off valve MV10, the sixth on-off valve QV05, the seventh on-off valve QV06, and the eighth on-off valve MV13 are, for example, ball valves.

[0076] To prevent water from flowing back in the pipe, Figure 1 As shown, in the above embodiments of the present disclosure, one-way valves L2, L3, L4, L5, L6, L7, L8, and L11 are further provided in some pipelines as needed.

[0077] Diaphragm valves feature a flexible diaphragm or combination of diaphragms installed within the valve body and bonnet. The closure element is a compression device connected to the diaphragm. The advantage of a diaphragm valve is that its operating mechanism is isolated from the media pathway, ensuring the purity of the working medium while significantly reducing the impact of the media in the pipeline on the operating mechanism's working components.

[0078] Each of the above-mentioned valves can be designed as manual valves or electric valves as needed. In some embodiments of the present disclosure, the water treatment equipment also includes a control module that can control one or more valves to a corresponding working state based on the input water treatment equipment mode and the set program, thereby realizing automatic control of the water treatment equipment, improving its working efficiency, and making operation more convenient.

[0079] In some embodiments of the present disclosure, the first flowmeter RF01, the second flowmeter RF02, and the third flowmeter RF03 are, for example, rotameters. Rotameters are variable area flowmeters that measure flow based on float position and have advantages such as a simple and intuitive structure, low pressure loss, and easy maintenance.

[0080] In the disclosed embodiment, each conductivity meter is used to measure the conductivity of the water flowing in the pipeline. Each pressure switch will close when the water pressure in the pipeline reaches a pressure threshold, thereby preventing the booster pump from operating under overload pressure and causing damage.

[0081] In some embodiments of the present disclosure, the specific types of the above-mentioned pressure detection devices are not limited. For example, it can be a mechanical pressure gauge or electronic pressure gauge with a dial, or it can be a pressure sensor without a dial, which is used to send a pressure detection signal to the control module in the automatic control of the water treatment equipment.

[0082] In the disclosed embodiment, each sampling branch is equipped with an on-off valve, such as a manual on-off valve. An operator can extract a water sample from the pure water in the pipeline by opening the on-off valve on the sampling branch and then perform relevant water quality testing.

[0083] In the embodiment of the present disclosure, an overflow branch 207 connected to the secondary pure water outlet 201C is designed. Through the overflow effect of the overflow valve, equipment damage or safety accidents caused by excessive pipeline pressure can be prevented.

[0084] In some embodiments, the working modes of the water treatment equipment provided by the embodiments of the present disclosure include a water treatment working mode, a fault working mode, a power-on flushing working mode, and a disinfection flushing working mode.

[0085] like Figure 2 As shown, in the water treatment working mode, the first switch valve DV01 is open (i.e., in the open state), the water inlet valve port 3 and the water outlet valve port 2 of the three-way valve GV01 are open, the bypass valve port 1 of the three-way valve GV01 is closed (i.e., in the closed device), the first-level water inlet booster pump M-2, the first-level return water booster pump M-4 and the second-level water inlet booster pump M-3 are open, the first regulating valve NV01 and the second switch valve MV11 are open, the second bypass switch valve SV01 is closed, the third regulating valve NV03 and the fourth regulating valve NV05 are open, and the fifth switch valve MV10 is closed. When the water treatment equipment is in the water treatment working mode, the flow path of the water body is as follows Figure 2 Indicated by the dotted line.

[0086] like Figure 3 As shown, in the fault working mode, the first switch valve DV01 is open, the water inlet valve port 3 and the bypass valve port 1 of the three-way valve GV01 are open, the water outlet valve port 2 of the three-way valve GV01 is closed, the first-level water inlet booster pump M-2 and the first-level return water booster pump M-4 are closed due to the fault, the second-level water inlet booster pump M-3 is open, the first regulating valve NV01 and the second switch valve MV11 are open, the second bypass switch valve SV01 is closed, the third regulating valve NV03 is open, the fourth regulating valve NV05 is closed, and the fifth switch valve MV10 is closed. When the water treatment equipment is in the fault working mode, the flow path of the water body is as follows Figure 3 As shown by the middle dotted line, the concentrated water flowing out of the secondary reverse osmosis assembly 201 flows into the primary reverse osmosis assembly 101 and is then discharged through the primary waste pipe 103 .

[0087] like Figure 4 As shown, in the power-on flushing mode, the first switch valve DV01 is open, the water inlet valve port 3 and the water outlet valve port 2 of the three-way valve GV01 are open, the bypass valve port 1 of the three-way valve GV01 is closed, the first-level water inlet booster pump M-2, the first-level return water booster pump M-4, and the second-level water inlet booster pump M-3 are open, the first regulating valve NV01 and the second switch valve MV11 are open, the second bypass switch valve SV01 and the second regulating valve NV03 are open, the third regulating valve NV03 and the fourth regulating valve NV05 are open, and the fifth switch valve MV10 is closed. In the power-on flushing mode, keeping the second bypass switch valve SV01 and the second regulating valve NV02 open can achieve the effects of flushing and exhausting.

[0088] like Figures 5a to 5e As shown in the figure, in the disinfection and flushing working mode, the working process of the water treatment equipment includes the following five stages:

[0089] In the first stage, within the first set time period (for example, within 0 to 15 seconds after the disinfection and flushing working mode is started), the first switch valve DV01 is opened, the water inlet valve port 3 and the water outlet valve port 2 of the three-way valve GV01 are opened, the bypass valve port 1 of the three-way valve GV01 is closed, the first-level water inlet booster pump M-2, the first-level return water booster pump M-4 and the second-level water inlet booster pump M-3 are closed, the second switch valve MV11 is closed, the second bypass switch valve SV01 is closed, the third regulating valve NV03 and the fourth regulating valve NV05 are opened, and the fifth switch valve MV10 is opened;

[0090] In the second stage, within a second set time period after the first set time period (for example, within 15 seconds to 3 minutes after the disinfection and flushing working mode is started), the first switch valve DV01 is closed, the water inlet valve port 3 and the water outlet valve port 2 of the three-way valve GV01 are opened, the bypass valve port 1 of the three-way valve is closed, the first-level water inlet booster pump M-2, the first-level return water booster pump M-4 and the second-level water inlet booster pump M-3 are turned on, the second switch valve MV11 is closed, the second bypass switch valve SV01 is closed, the third regulating valve NV03 and the fourth regulating valve NV05 are opened, and the fifth switch valve MV10 is closed;

[0091] In the third stage, within a third set time period after the second set time period (for example, within 3 minutes to 5 minutes after the disinfection and flushing working mode is started), the first switch valve DV01 is closed, the water inlet valve port 3 and the bypass valve port 1 of the three-way valve GV01 are opened, the water outlet valve port 2 of the three-way valve GV01 is closed, the first-level water inlet booster pump M-2 and the first-level return water booster pump M-4 are closed, the second-level water inlet booster pump M-3 is turned on, the second switch valve MV11 is closed, the second bypass switch valve SV01 is closed, the third regulating valve NV03 is opened, the fourth regulating valve NV05 is closed, and the fifth switch valve MV10 is closed;

[0092] In the fourth stage, within the fourth set time period after the third set time period (for example, within 5 minutes to 5 minutes 30 seconds after the disinfection and flushing working mode is started), the first switch valve DV01 is opened, the water inlet valve port 3 and the water outlet valve port 2 of the three-way valve GV01 are opened, the bypass valve port 1 of the three-way valve GV01 is closed, the first-level water inlet booster pump M-2, the first-level return water booster pump M-4 and the second-level water inlet booster pump M-3 are opened, the first regulating valve NV01 and the second switch valve MV11 are opened, the second bypass switch valve SV01 and the second regulating valve NV02 are opened, the third regulating valve NV03 and the fourth regulating valve NV05 are opened, and the fifth switch valve MV10 is closed;

[0093] In the fifth stage, within the fifth set time period after the fourth set time period (for example, within 5 minutes and 30 seconds to 6 minutes after the disinfection and flushing working mode is started), the first switch valve DV01 is opened, the water inlet valve port 3 and the bypass valve port 1 of the three-way valve GV01 are opened, the water outlet valve port 2 of the three-way valve GV01 is closed, the first-level water inlet booster pump M-2 and the first-level return water booster pump M-4 are closed, the second-level water inlet booster pump M-3 is opened, the first regulating valve NV01 and the second switch valve MV11 are opened, the second bypass switch valve SV01 and the second regulating valve NV02 are opened, the third regulating valve NV03 is opened, the fourth regulating valve NV05 is closed, and the fifth switch valve MV10 is closed.

[0094] The above set time periods can be determined based on actual needs or experience. During the second and third set time periods, the second on-off valve MV11 and the second bypass on-off valve SV01 are closed, thereby sealing the disinfectant water (i.e., the diluted disinfectant) inside the device, immersing and disinfecting the interior of the device to fully exert the disinfection and sterilization effect.

[0095] In a further embodiment, the first-stage water inlet booster pump M-2, the first-stage return water booster pump M-4 and the second-stage water inlet booster pump M-3 are submersible pumps. When working, they are immersed in water as a whole, which can effectively reduce noise pollution compared with the vertical pumps used in traditional water treatment equipment.

[0096] In some embodiments of the present disclosure, the first-stage reverse osmosis assembly 101 and the second-stage reverse osmosis assembly 201 respectively include one or multiple reverse osmosis units arranged in parallel, each reverse osmosis unit including a membrane shell, a filter core located in the membrane shell, and a water outlet pipe located at the central axis of the filter core, wherein a water inlet is provided on one side of the membrane shell and a water outlet is provided on the other side of the membrane shell; when there are multiple reverse osmosis units, the multiple reverse osmosis units are arranged in sequence, and in two adjacent reverse osmosis units, the water outlet of the membrane shell of one reverse osmosis unit is connected to the water inlet of the membrane shell of the other reverse osmosis unit through a guide pipe. The specific setting position of the water inlet and the water outlet of the membrane shell is not limited, for example, it can be set at a position near the top of the membrane shell, or it can be set at a position near the bottom of the membrane shell. When there are multiple reverse osmosis units, in two adjacent reverse osmosis units, the water outlet of the membrane shell of one reverse osmosis unit and the water inlet of the membrane shell of the other reverse osmosis unit can be set relative to each other to shorten the length of the guide pipe as much as possible.

[0097] like Figure 6 As shown, a reverse osmosis assembly including four reverse osmosis units is used as an example. The water in membrane shell 01 and membrane shell 03 flows in from the filter core 7 and flows out from the outlet pipe 8 and the gaps on both sides of the filter core 7. The water in membrane shell 02 and membrane shell 04 flows in from the gaps on both sides of the filter core 7 and flows out from the filter core 7 and the outlet pipe 8. In this embodiment, water enters from the water inlet 5, and the water flows from the middle part of the filter core 7 from top to bottom in membrane shell 01, and then flows from the gaps on both sides of the filter core 7 from bottom to top. When passing through the guide pipe 11, it flows into membrane shell 02. In membrane shell 02, the water flows from the gaps on both sides of the filter core 7 from top to bottom, and then flows from the middle filter core 7 from bottom to top to the top of membrane shell 02, and flows into membrane shell 03 from the guide pipe 21 on the top side wall. Within membrane housing 03, water flows from top to bottom through the center of filter core 7, then from bottom to top through the gaps on either side of filter core 7, and finally flows through flow guide tube 31 into membrane housing 04. Within membrane housing 04, water flows from top to bottom through the gaps on either side of filter core 7, then from bottom to top through the center of filter core 7 to the top of membrane housing 04. Waste and other materials carried along by the water flow are ultimately discharged through outlet 6. Furthermore, within each membrane housing, water flows from bottom to top through the center outlet pipe 8, finally being discharged through the outlet at the top of outlet pipe 8.

[0098] The reverse osmosis unit adopts the above design, which can effectively increase water flow, reduce or even eliminate the existence of dead space, thereby improving water quality. During the start-up flushing or disinfection flushing, it can effectively improve the flushing efficiency and enhance the cleaning effect.

[0099] The water treatment equipment of the above-mentioned embodiments of the present disclosure can be used not only in hemodialysis systems with extremely high requirements for purified water, but also in other occasions with high demands for purified water, including but not limited to pharmaceutical workshops, food processing workshops, biochemical workshops, etc.

[0100] The present disclosure also provides a hemodialysis system comprising the water treatment device of any of the aforementioned embodiments. Since the water treatment device has the aforementioned beneficial effects, the hemodialysis system has good therapeutic effects.

[0101] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0102] Each embodiment in this specification is described in a related manner. The same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0103] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the scope of protection of the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure are included in the scope of protection of the present disclosure.

Claims

1. A water treatment device, characterized in that: include: A primary reverse osmosis component, comprising a primary water inlet, a primary concentrated water outlet and a primary pure water outlet; A primary water inlet pipeline connected to the primary water inlet; A first-stage water inlet booster pump is arranged on the first-stage water inlet pipeline; A primary waste discharge pipeline connected to the primary concentrated water outlet; A primary concentrated water return pipeline connects the primary concentrated water outlet with the primary water inlet; A two-stage reverse osmosis component, including a two-stage water inlet, a two-stage concentrated water outlet, and a two-stage pure water outlet; A secondary water inlet pipeline connects the primary pure water outlet with the secondary water inlet; A secondary water inlet booster pump is arranged on the secondary water inlet pipeline; A secondary concentrated water return pipeline connects the secondary concentrated water outlet to the secondary water inlet, and connects the secondary concentrated water outlet to the primary water inlet; A rear water supply pipeline, used to communicate with the water-using equipment and connect the secondary pure water outlet with the primary water inlet pipeline; The working modes of the water treatment equipment include water treatment working mode, fault working mode, power-on flushing working mode and disinfection flushing working mode, wherein: In the water treatment working mode, the first switch valve is opened, the water inlet valve port and the water outlet valve port of the three-way valve are opened, the bypass valve port of the three-way valve is closed, the primary water inlet booster pump, the primary water return booster pump and the secondary water inlet booster pump are opened, the first regulating valve and the second switch valve are opened, the second bypass switch valve is closed, the third regulating valve and the fourth regulating valve are opened, and the fifth switch valve is closed; In the fault working mode, the first switch valve is opened, the water inlet valve port and the bypass valve port of the three-way valve are opened, the water outlet valve port of the three-way valve is closed, the primary water inlet booster pump and the primary water return booster pump are closed, the secondary water inlet booster pump is opened, the first regulating valve and the second switch valve are opened, the second bypass switch valve is closed, the third regulating valve is opened, the fourth regulating valve is closed, and the fifth switch valve is closed; In the power-on flushing working mode, the first switch valve is opened, the water inlet valve port and the water outlet valve port of the three-way valve are opened, the bypass valve port of the three-way valve is closed, the primary water inlet booster pump, the primary water return booster pump and the secondary water inlet booster pump are opened, the first regulating valve and the second switch valve are opened, the second bypass switch valve and the second regulating valve are opened, the third regulating valve and the fourth regulating valve are opened, and the fifth switch valve is closed; In the disinfection and flushing working mode, within a first set time period, the first switch valve is opened, the water inlet valve port and the water outlet valve port of the three-way valve are opened, the bypass valve port of the three-way valve is closed, the primary water inlet booster pump, the primary return water booster pump and the secondary water inlet booster pump are closed, the second switch valve is closed, the second bypass switch valve is closed, the third regulating valve and the fourth regulating valve are opened, and the fifth switch valve is opened; within a second set time period after the first set time period, the first switch valve is closed, the water inlet valve port and the water outlet valve port of the three-way valve are opened, and the bypass valve port of the three-way valve is closed. The outlet valve port is opened, the bypass valve port of the three-way valve is closed, the primary water inlet booster pump, the primary water return booster pump and the secondary water inlet booster pump are opened, the second switch valve is closed, the second bypass switch valve is closed, the third regulating valve and the fourth regulating valve are opened, and the fifth switch valve is closed; within a third set time period after the second set time period, the first switch valve is closed, the inlet valve port and the bypass valve port of the three-way valve are opened, the outlet valve port of the three-way valve is closed, the primary water inlet booster pump and the primary water return booster pump are closed, the secondary The water inlet boost pump is turned on, the second switch valve is closed, the second bypass switch valve is closed, the third regulating valve is turned on, the fourth regulating valve is closed, and the fifth switch valve is closed; in a fourth set time period after the third set time period, the first switch valve is turned on, the water inlet valve port and the water outlet valve port of the three-way valve are turned on, the bypass valve port of the three-way valve is closed, the first water inlet boost pump, the first water return boost pump and the second water inlet boost pump are turned on, the first regulating valve and the second switch valve are turned on, the second bypass switch valve and the second regulating valve are turned on, The third regulating valve and the fourth regulating valve are opened, and the fifth switch valve is closed; in the fifth set time period after the fourth set time period, the first switch valve is opened, the water inlet valve port and the bypass valve port of the three-way valve are opened, the water outlet valve port of the three-way valve is closed, the first-level water inlet booster pump and the first-level return water booster pump are closed, the second-level water inlet booster pump is opened, the first regulating valve and the second switch valve are opened, the second bypass switch valve and the second regulating valve are opened, the third regulating valve is opened, the fourth regulating valve is closed, and the fifth switch valve is closed.

2. The water treatment equipment according to claim 1, characterized in that: Also includes: The three-way valve comprises the bypass valve port, and the water inlet valve port and the water outlet valve port connected to the primary water inlet pipeline; and Short-circuit the bypass and connect the bypass valve port with the secondary water inlet pipeline.

3. The water treatment equipment according to claim 2, characterized in that: Also includes: The first-stage return water booster pump is arranged on the first-stage concentrated water return water pipeline.

4. The water treatment equipment according to claim 3, characterized in that: Also includes: A first pressure detection device, a first switch valve, a first flow meter, a first conductivity meter, a first pressure switch and a second pressure detection device are arranged on the primary water inlet pipeline and are arranged in sequence in a direction close to the primary water inlet, and a first bypass switch valve is arranged in parallel with the first switch valve, wherein the water inlet valve port and the water outlet valve port are located between the first flow meter and the first conductivity meter, the primary water inlet booster pump is located between the first pressure switch and the second pressure detection device, the primary concentrated water return pipeline is connected to the portion of the primary water inlet pipeline located between the second pressure detection device and the primary water inlet, and the rear-stage water supply pipeline is connected to the portion of the primary water inlet pipeline located between the first flow meter and the water inlet valve port; A third pressure detection device, the first regulating valve, the second switch valve and the second conductivity meter are arranged on the primary exhaust pipeline, and the second bypass switch valve and the second regulating valve are arranged in parallel with the first regulating valve after being connected in series.

5. The water treatment equipment according to claim 4, characterized in that: The water treatment equipment also includes: a fourth pressure detection device and a second pressure switch arranged on the secondary water inlet pipeline and located between the primary pure water outlet and the secondary water inlet booster pump, a first sampling branch connected to the secondary water inlet pipeline, and a third switch valve arranged on the first sampling branch; and / or, an overflow branch connected to the secondary pure water outlet, an overflow valve and a fourth switch valve arranged on the overflow branch; and / or The secondary concentrate water return pipeline includes a secondary concentrate water return main line connected to the secondary concentrate water outlet, a secondary concentrate water return first branch connected to the secondary concentrate water return main line and connected to the secondary water inlet pipeline, and a secondary concentrate water return second branch connected to the secondary concentrate water return main line and connected to the primary water inlet pipeline, a fifth pressure detection device and the third regulating valve arranged on the secondary concentrate water return main line, and a fourth regulating valve arranged on the secondary concentrate water return first branch, wherein the secondary concentrate water return first branch is connected to a portion of the secondary water inlet pipeline located between the primary pure water outlet and the second pressure switch, and the secondary concentrate water return second branch is connected to a portion of the primary water inlet pipeline located between the three-way valve and the first conductivity meter.

6. The water treatment equipment according to claim 5, characterized in that: Also includes: A third conductivity meter, a sixth pressure detection device, a second flow meter and a seventh pressure detection device provided on the rear-stage water supply pipeline and located between the secondary pure water outlet and the water-using equipment, a disinfectant supply branch and a second sampling branch respectively connected to the portion of the rear-stage water supply pipeline located between the secondary pure water outlet and the water-using equipment, the fifth switch valve provided on the disinfectant supply branch, and a sixth switch valve provided on the second sampling branch; and an eighth pressure detecting device and a third flow meter provided on the rear-stage water supply pipeline and located between the water-using equipment and the primary water inlet pipeline, a third sampling branch and a rear-stage waste discharge branch respectively connected to the portion of the rear-stage water supply pipeline located between the water-using equipment and the primary water inlet pipeline, a seventh switch valve provided on the third sampling branch, and an eighth switch valve provided on the rear-stage waste discharge branch.

7. The water treatment equipment according to claim 6, characterized in that: The primary water inlet booster pump, the primary water return booster pump and the secondary water inlet booster pump are submersible pumps respectively; and / or The three-way valve is a three-way ball valve; and / or, the first regulating valve, the second regulating valve, the third regulating valve and the fourth regulating valve are diaphragm valves respectively; and / or, the first switch valve is a ball valve, the second bypass switch valve is a solenoid valve, and the first bypass switch valve, the second switch valve, the third switch valve, the fourth switch valve, the fifth switch valve, the sixth switch valve, the seventh switch valve and the eighth switch valve are ball valves respectively; and / or The first flowmeter, the second flowmeter and the third flowmeter are rotor flowmeters respectively.

8. The water treatment equipment according to any one of claims 1 to 7, characterized in that: The primary reverse osmosis assembly and the secondary reverse osmosis assembly respectively include one or multiple reverse osmosis units arranged in parallel, each of the reverse osmosis units includes a membrane shell, a filter core located in the membrane shell, and a water outlet pipe located at the central axis of the filter core, wherein a water inlet is provided on one side of the membrane shell, and a water outlet is provided on the other side of the membrane shell; when there are multiple reverse osmosis units, the multiple reverse osmosis units are arranged in sequence, and among two adjacent reverse osmosis units, the water outlet of the membrane shell of one of the reverse osmosis units is connected to the water inlet of the membrane shell of the other reverse osmosis unit through a guide pipe.

9. A hemodialysis system, characterized in that: Comprising the water treatment equipment according to any one of claims 1-8.

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