Water treatment equipment and hemodialysis system

Abstract

The disclosed embodiment provides a water treatment device and a hemodialysis system. In the water treatment device, the first-level reverse osmosis membrane group includes a first-level water inlet, a first-level concentrated water outlet and a first-level pure water outlet; the second-level reverse osmosis membrane group includes a second-level water inlet, a second-level concentrated water outlet and a second-level pure water outlet; the first-level water inlet pipeline connects the first-level water inlet with the water outlet of the water tank, the first-level booster pump and the flow increase pump are arranged on the first-level water inlet pipeline, and the first-level waste discharge pipeline is connected with the first-level concentrated water outlet; the first-level concentrated water return pipeline connects the first-level concentrated water outlet with the first-level water inlet; the second-level water inlet pipeline connects the first-level pure water outlet with the second-level water inlet, and the second-level booster pump is arranged on the second-level water inlet pipeline; the rear-level water supply pipeline connects the second-level pure water outlet with the water-using equipment, and connects the second-level pure water outlet with the water tank; the heater is arranged on the rear-level water supply pipeline, the second-level concentrated water first return pipeline connects the second-level concentrated water outlet with the second-level water inlet, and connects the second-level concentrated water outlet with the water tank.

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 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, and then the purified blood is returned to the patient. Hemodialysis can achieve the therapeutic purpose of removing metabolic waste and excess water from the body and maintaining electrolyte and acid-base balance. In the dialyzer, blood flows in the hollow fibers, and the dialysate flows in the opposite direction outside the hollow fibers. The blood and the dialysate exchange substances through diffusion, ultrafiltration, adsorption and convection, thereby achieving the purpose of purifying the blood.

[0003] Dialysate is generally obtained by diluting the dialysis concentrate containing electrolytes and bases with pure water in proportion, and its electrolyte concentration is close to that in normal blood. Since urban tap water contains a variety of trace elements, especially heavy metals, as well as disinfectants, endotoxins and bacteria, water treatment equipment is required to obtain pure water for dilution after a series of water treatment processes.

[0004] In the related art, the main structure of the water treatment equipment includes a reverse osmosis membrane, a water tank and multiple pipes, etc. Bacteria are easily retained in these structures. If regular disinfection and sterilization are not carried out, bacteria will still exist in the water produced by the water treatment equipment, making the water treatment effect less than ideal. Summary of the invention

[0005] The purpose of the embodiments of the present disclosure is to provide a water treatment device and a hemodialysis system to achieve disinfection and sterilization of the water treatment device while ensuring the water quality and service life of the produced water, thereby improving the use effect of the water treatment device. The specific technical solution is as follows:

[0006] To achieve the above-mentioned object, the embodiment of the present disclosure provides a water treatment device, which includes a water tank, a heater, a primary reverse osmosis membrane group, a secondary reverse osmosis membrane group, a primary booster pump, a flow booster pump, a secondary booster pump, a primary water inlet pipeline, a primary waste discharge pipeline, a primary concentrated water return pipeline, a secondary water inlet pipeline, a secondary concentrated water first return pipeline, a secondary concentrated water second return pipeline and a rear-stage water supply pipeline, wherein;

[0007] The primary reverse osmosis membrane group comprises a primary water inlet, a primary concentrated water outlet and a primary pure water outlet;

[0008] The secondary reverse osmosis membrane group comprises a secondary water inlet, a secondary concentrated water outlet and a secondary pure water outlet;

[0009] The primary water inlet pipeline is connected to the primary water inlet and the water outlet of the water tank, the primary booster pump is arranged on the primary water inlet pipeline, and the flow booster pump is also arranged on the primary water inlet pipeline, and is located between the primary booster pump and the primary water inlet;

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

[0011] The primary concentrated water return pipeline is connected to the primary concentrated water outlet and the primary water inlet;

[0012] The secondary water inlet pipeline is connected to the primary pure water outlet and the secondary water inlet, and the secondary booster pump is arranged on the secondary water inlet pipeline;

[0013] The rear-stage water supply pipeline is connected to the secondary pure water outlet and the water-using equipment, and is connected to the secondary pure water outlet and the water tank;

[0014] The heater is arranged on the rear-stage water supply pipeline and is located between the water-using equipment and the water tank;

[0015] The secondary concentrated water first return pipe is connected to the secondary concentrated water outlet and the secondary water inlet, and the secondary concentrated water second return pipe is connected to the secondary concentrated water outlet and the water inlet of the water tank.

[0016] In some embodiments, the heater is an electromagnetic heater, a coil of the electromagnetic heater is wound around the outside of the rear-stage water supply pipeline, and there is a gap between the coil and the rear-stage water supply pipeline.

[0017] In some embodiments, the heater includes a plurality of heating units, each of which includes a heating tube provided on a rear-stage water supply pipeline, an electromagnetic coil, thermal insulation cotton, and a plurality of shielding magnetic strips, wherein:

[0018] The heat insulation cotton is wrapped around the outside of the heating tube;

[0019] The electromagnetic coil is wound around a side of the heat insulation cotton away from the heating tube;

[0020] The multiple shielding magnetic strips are located on a side of the electromagnetic coil away from the thermal insulation cotton. The multiple shielding magnetic strips are evenly arranged along the circumference of the electromagnetic coil, and the extension direction is parallel to the axial direction of the heating tube.

[0021] In some embodiments, the water treatment equipment further comprises:

[0022] A primary three-way valve, comprising a primary bypass valve port, a primary water inlet valve port and a primary water outlet valve port connected to the primary water inlet pipeline, and

[0023] A primary short-circuit bypass is provided to connect the primary bypass valve port with the secondary water inlet pipeline;

[0024] A secondary three-way valve, including a secondary bypass valve port, and a secondary water inlet valve port and a secondary water outlet valve port connected to the secondary water inlet pipeline, and

[0025] A secondary short-circuit bypass is provided to connect the secondary bypass valve port with the primary water inlet pipeline;

[0026] A return water three-way valve, comprising a return water bypass valve port, and a return water inlet valve port and a return water outlet valve port connected to the rear-stage water supply pipeline, and

[0027] The return water short-circuit bypass connects the return water bypass valve port with the subsequent water supply pipeline.

[0028] In some embodiments, the water treatment device further comprises a pressure regulating valve;

[0029] The pressure-stabilizing valve is arranged on the rear-stage water supply pipeline, and the pressure-stabilizing valve is located between the return water three-way valve and the water tank.

[0030] In some embodiments, the water treatment equipment also includes a thermal disinfection circulation pump arranged on the secondary water outlet pipeline.

[0031] In some embodiments, the working modes of the water treatment equipment include a water treatment working mode, a whole machine disinfection mode and a pipeline disinfection mode, wherein:

[0032] In the water treatment working mode, the heater is turned off, the first-level water inlet valve port and the first-level water outlet valve port of the first-level three-way valve are opened, the first-level bypass valve port is closed, the first-level booster pump and the second-level booster pump are opened, the second-level water inlet valve port and the second-level water outlet valve port of the second-level three-way valve are opened, the second-level bypass valve port is closed, the thermal disinfection circulation pump is turned off, the return water inlet valve port and the return water outlet valve port of the return water three-way valve are opened, and the return water bypass valve port is closed;

[0033] In the whole machine disinfection mode, the heater is turned on, the first-level water inlet valve port and the first-level water outlet valve port of the first-level three-way valve are opened, the first-level bypass valve port is closed, the first-level booster pump and the second-level booster pump are turned on, the second-level water inlet and the second-level water outlet of the second-level three-way valve are opened, the second-level bypass valve port is closed, the thermal disinfection circulation pump is closed, the return water inlet and the return water outlet of the return water three-way valve are opened, and the return water bypass valve port is closed;

[0034] In the pipeline disinfection mode, within a first preset time period, the heater is turned off, the first water inlet valve port and the first water outlet valve port of the first-level three-way valve are opened, the first-level bypass valve port is closed, the first-level booster pump and the second-level booster pump are opened, the second-level water inlet valve port and the second-level water outlet valve port of the second-level three-way valve are opened, the second-level bypass valve port is closed, the thermal disinfection circulation pump is turned off, the return water inlet valve port and the return water outlet valve port of the return water three-way valve are opened, and the return water bypass valve port is closed;

[0035] In a second preset time period after the first preset time period, the heater and the thermal disinfection circulation pump are turned on, the return water inlet valve port and the return water bypass valve port of the return water three-way valve are opened, the return water outlet valve port is closed, and the first-level booster pump, the second-level booster pump, the first-level three-way valve and the second-level three-way valve are all closed.

[0036] In some embodiments, the water treatment equipment further comprises a disinfection waste discharge pipeline connected to the rear-stage water supply pipeline.

[0037] In some embodiments, the water treatment equipment also includes a first pressure detection device provided on the secondary water inlet pipeline, a second pressure device provided on the rear-stage water supply pipeline, a third pressure device provided on the primary waste discharge pipeline, and a fourth pressure device provided on the secondary waste discharge pipeline.

[0038] In order to achieve the above-mentioned object, an embodiment of the present disclosure further provides a hemodialysis system, which includes any of the water treatment devices described above.

[0039] Beneficial effects of the embodiments of the present disclosure:

[0040] The disclosed embodiments provide a water treatment device and a hemodialysis system. When the water treatment device is performing water treatment, the heater can be started to continuously heat the water flowing through the return water pipeline. After the heated water enters the water tank, the water in the water tank can be heated. When the temperature rises to the disinfection temperature, for example, 85°C, the water tank can be disinfected. At the same time, when the hot water in the water tank enters the primary permeable membrane group and the secondary permeable membrane group, the high-temperature water can also perform high-temperature disinfection on the primary permeable membrane group and the secondary permeable membrane group, thereby improving the biological indicators of the water produced by the whole water treatment equipment. In addition, the water flowing through each pipeline is continuously heated by the heater, so that the temperature in the pipeline reaches the sterilization temperature, for example, above 120°C, thereby achieving disinfection and sterilization of the pipeline, further improving the disinfection and sterilization effect of the water treatment equipment, thereby further improving the purification effect of the water treatment.

[0041] Of course, it is not necessary to achieve all the advantages described above at the same time to implement any product or method of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 It is a schematic diagram of water treatment equipment according to some embodiments of the present disclosure;

[0044] Figure 2 An axial cross-sectional view of a heating unit of a heater according to some embodiments of the present disclosure;

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

[0046] Figure 4 A schematic diagram of a water treatment device in some embodiments of the present disclosure when it is in a second set time period of a pipeline disinfection mode;

[0047] Figure 5 It is a schematic diagram of a water treatment device in some embodiments of the present disclosure when it is in a primary failure mode;

[0048] Figure 6 This is a schematic diagram of a water treatment device in some embodiments of the present disclosure being in a secondary failure mode. DETAILED DESCRIPTION

[0049] The following will be combined with the 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 described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0050] In order to achieve disinfection and sterilization of water treatment equipment while ensuring the water quality and service life of the produced water, thereby improving the use effect of the water treatment equipment, the embodiment of the present disclosure provides a water treatment equipment and a hemodialysis system. Figure 1 The water treatment equipment and hemodialysis system provided by the present disclosure are described in detail.

[0051] like Figure 1As shown, the water treatment equipment provided by the embodiment of the present disclosure includes: a water tank 101, a heater 201, a primary reverse osmosis membrane group 301, a secondary reverse osmosis membrane group 401, a primary booster pump M1, a flow booster pump M3, a secondary booster pump M2, a primary water inlet pipeline 302, a primary waste discharge pipeline 303, a primary concentrated water return pipeline 304, a secondary water inlet pipeline 402, a secondary concentrated water first return pipeline 403, a secondary concentrated water second return pipeline 404 and a rear-stage water supply pipeline 501, wherein;

[0052] The primary reverse osmosis membrane group 301 includes a primary water inlet 3011, a primary concentrated water outlet 3012 and a primary pure water outlet 3013;

[0053] The secondary reverse osmosis membrane group 401 includes a secondary water inlet 4011, a secondary concentrated water outlet 4012 and a secondary pure water outlet 4013;

[0054] The primary water inlet pipeline 302 is connected to the primary water inlet 3011 and the water outlet of the water tank 101, the primary booster pump M1 is arranged on the primary water inlet pipeline 302, and the flow booster pump M3 is also arranged on the primary water inlet pipeline 302 and is located between the primary booster pump M1 and the primary water inlet 3011;

[0055] The primary waste discharge pipeline 303 is connected to the primary concentrated water outlet 3012;

[0056] The primary concentrated water return pipe 304 is connected to the primary concentrated water outlet 3012 and the primary water inlet 3011;

[0057] The secondary water inlet pipeline 402 is connected to the primary pure water outlet 3013 and the secondary water inlet 4011, and the secondary booster pump M2 is arranged on the secondary water inlet pipeline 402;

[0058] The rear water supply pipeline 501 connects the secondary pure water outlet 4013 with the water-using equipment, and connects the secondary pure water outlet 4013 with the water tank 101;

[0059] The heater 201 is arranged on the rear water supply pipeline 501 and is located between the water-using equipment and the water tank 101;

[0060] The secondary concentrate first return pipe 403 connects the secondary concentrate outlet 4012 and the secondary water inlet 4011 , and the secondary concentrate second return pipe 404 connects the secondary concentrate outlet 4012 and the water inlet of the water tank 101 .

[0061] In the disclosed embodiment, the primary reverse osmosis membrane group 301 includes a primary concentrated water side and a primary pure water side, and the primary booster pump M1 is used to provide pressure to press the water in the water tank 101 into the primary concentrated water side through the primary water inlet pipeline 302, and press the water on the primary concentrated water side into the primary pure water side through the primary reverse osmosis membrane to achieve water filtration. The secondary reverse osmosis membrane group 401 includes a secondary concentrated water side and a secondary pure water side, and the water treated by the primary reverse osmosis membrane group 301 is discharged from the primary pure water outlet, and then enters the secondary concentrated water side through the secondary water inlet pipeline 402, and the secondary booster pump M2 is also used to provide pressure, press the water in the secondary water inlet pipeline 402 into the secondary concentrated water side, and then press the water entering the secondary concentrated water side into the secondary pure water side through the secondary reverse osmosis membrane to achieve further water filtration.

[0062] The water on the primary concentrate side cannot be completely filtered into the primary pure water side, and part of the remaining water on the primary concentrate side will return to the primary concentrate side through the primary concentrate return pipe 304 for re-filtration, and part of it will be discharged through the primary waste pipe 303. The water on the secondary concentrate side cannot be completely filtered into the secondary pure water side, and part of the remaining water on the secondary concentrate side will return to the secondary concentrate side through the secondary concentrate first return pipe 403 for re-filtration, and part of it will return to the water tank 101 through the secondary concentrate second return pipe 404. The water in the water treatment equipment can be recycled through the primary concentrate return pipe 304, the secondary concentrate first return pipe 403, and the secondary concentrate second return pipe 404, thereby avoiding water waste.

[0063] In the disclosed embodiment, the primary booster pump M1 is used to provide a basic pressure value, such as 15 kg. The flow booster pump M3 is used to push the concentrated water in the system to flow at a high speed, breaking the filter cake layer formed on the surface of the reverse osmosis membrane in the reverse osmosis membrane group. When the flow booster pump M3 stops running, the reverse osmosis membrane forms a barrier layer with an ion concentration higher than that of the source water on the membrane surface as the filtration time increases. After the flow booster pump M3 is started, the water in the passage will be forced to mix with the newly added source water. When the pressure in the water treatment equipment decreases, water is added to the pipeline through the primary booster pump M1, thereby increasing the pressure in the pipeline.

[0064] In the disclosed embodiment, the first-stage reverse osmosis membrane group 301 and the second-stage reverse osmosis membrane group 401 respectively include one or more reverse osmosis units, and the multiple reverse osmosis units are connected in parallel or in series. Each reverse osmosis unit includes a reverse osmosis membrane shell and a reverse osmosis membrane located in the reverse osmosis membrane shell, and a water outlet pipe located at the central axis of the reverse osmosis membrane, wherein one side of the reverse osmosis membrane shell is provided with a water inlet, and the other side is provided with a water outlet; 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 reverse osmosis membrane shell of one reverse osmosis unit is connected to the water inlet of the reverse osmosis membrane shell of another reverse osmosis unit through a guide pipe. The specific setting position of the water inlet and the water outlet of the reverse osmosis membrane shell is not limited, for example, it can be set at a position close to the top of the reverse osmosis membrane shell, or it can be set at a position close to the bottom of the reverse osmosis membrane shell. When there are multiple reverse osmosis units, in two adjacent reverse osmosis units, the water outlet of the reverse osmosis membrane shell of one reverse osmosis unit and the water inlet of the reverse osmosis membrane shell of another reverse osmosis unit can be relatively set to shorten the length of the guide pipe as much as possible.

[0065] In one embodiment, Figure 1 As shown, the water treatment equipment may also include an inlet branch 601, which is connected to the water tank 101. A two-way inlet valve DV04 is provided on the inlet branch 601. The two-way inlet valve DV04 includes an inlet valve port 1 and an outlet valve port 2 connected to the inlet branch 601. The inlet branch is used to add water to the water tank 101. When water is added to the water tank 101 through the inlet branch, the inlet valve port 1 and the outlet valve port 2 of the two-way valve DV04 are opened. Among them, the inlet branch 601 can be a softened water supply pipeline of a tap water pretreatment device. The water treatment equipment provided by the embodiment of the present disclosure can be directly connected to the softened water supply pipeline of the tap water pretreatment device when in use. After the softened water passes through the water treatment device, the water-using device is supplied with pure water that meets the purification requirements. The pure water can be used as water for dialysate dilution.

[0066] When the water treatment equipment is performing water treatment, starting the heater 201 can continuously heat the water flowing through the rear-stage water supply pipeline 501. After the heated water enters the water tank 101, the water in the water tank 101 can be heated. When the temperature rises to the disinfection temperature, for example, 85°C, the water tank 101 can be disinfected. At the same time, when the hot water in the water tank 101 enters the primary permeable membrane group 301 and the secondary permeable membrane group 401, the high-temperature water can also perform high-temperature disinfection on the primary permeable membrane group 301 and the secondary permeable membrane group 401, thereby improving the biological indicators of the water produced by the whole water treatment equipment. In addition, the water flowing through each pipeline is continuously heated by the heater 201, so that the temperature in the pipeline reaches the sterilization temperature, for example, above 120°C, thereby achieving disinfection and sterilization of the pipeline, further improving the disinfection and sterilization effect of the water treatment equipment, and further improving the purification effect of water treatment.

[0067] In one embodiment, the heater 201 is an electromagnetic heater, and the coil of the electromagnetic heater is wound around the outside of the rear-stage water supply pipeline 501 , and there is a gap between the coil and the rear-stage water supply pipeline 501 .

[0068] In the embodiment of the present disclosure, when the heater 201 is an electromagnetic heater, the coil of the electromagnetic heater is wound around the outside of the rear-stage water supply pipeline 501, and there is a gap between the electromagnetic heater and the rear-stage water supply pipeline 501, so that the magnetic field generated by the coil heats the water in the rear-stage water supply pipeline 501 while the electromagnetic heater does not damage the rear-stage water supply pipeline 501. Among them, the winding method of the coil can be tightly wound clockwise around the outside of the rear-stage water supply pipeline. In addition, the distance between the coil and the rear-stage water supply pipeline 501 can be set according to actual conditions. For example, it can be 0.5 cm, 1 cm or 1.2 cm, etc., which is not specifically limited in the embodiment of the present disclosure.

[0069] In one embodiment, the heater 201 includes a plurality of heating units, each of which includes a heating tube 2011 disposed on the rear water supply pipeline 501, as well as an electromagnetic coil 2012, a heat insulation cotton 2013 and a plurality of shielding magnetic strips 2014. Figure 2 shown.

[0070] The heat insulation cotton 2013 is wrapped around the outside of the heating tube 2011;

[0071] The electromagnetic coil 2012 is wound around the side of the heat insulation cotton 2013 away from the heating tube 2011;

[0072] The plurality of shielding magnetic strips 2014 are located on a side of the electromagnetic coil 2012 away from the heat insulating cotton 2013 . The plurality of shielding magnetic strips 2014 are evenly arranged along the circumference of the electromagnetic coil 2012 , and the extension direction is parallel to the axial direction of the heating tube 2011 .

[0073] In the present disclosure, Figure 2As shown, the heat insulation cotton 2013 is wrapped around the outside of the heating tube 2011 and is located between the heating tube 2011 and the electromagnetic coil 2012. The heat insulation cotton 2013 is located between the heating tube 2011 and the electromagnetic coil 2012, isolating the electromagnetic coil 2012 from the heating tube 2011, so that the electromagnetic coil 2012 can generate a changing magnetic field when powered on. When the magnetic lines of force in the changing magnetic field pass through the heating tube 2011, eddy currents are generated at the heating tube 2011, and the eddy currents generate heat energy, thereby heating the water in the heating tube 2011. In addition, the heat insulation cotton 2013 is wrapped around the outside of the heating tube 2011. During the heating process of the heating tube 2011, the heat insulation cotton 2013 is also used to keep the heating tube 2011 warm, preventing the water in the heating tube 2011 from cooling down too quickly, and reducing the heating time of the heater 201. The electromagnetic coil 2012 may be made of high temperature mica wire or other materials, which are not specifically limited in the embodiments of the present disclosure. The insulation wool 2013 may be made of glass fiber rock wool or other materials, which are not specifically limited in the embodiments of the present disclosure.

[0074] In addition, the heating unit includes a plurality of shielding magnetic strips 2014, which are all attached to the outside of the electromagnetic coil 2012, that is, the side of the electromagnetic coil 2012 away from the heat insulation cotton 2013. The extension direction of the shielding magnetic strips 2014 is parallel to the axial direction of the heating tube 2011, and is used to prevent the magnetic lines of force generated by the electromagnetic coil 2012 from radiating in a direction away from the heating tube 2011, so that the magnetic lines of force generated by the electromagnetic coil 2012 are maximized for heating the medium in the heating tube 2011, thereby reducing the heat loss of the heater 201 during the heating process.

[0075] In the present disclosure, Figure 2 As shown, multiple shielding magnetic strips 2014 are evenly arranged along the circumference of the electromagnetic coil 2012, which can better prevent the magnetic lines of force from radiating in the direction away from the heating tube 2011. The number of shielding magnetic strips 2014 can be set according to actual needs, for example, the number of shielding magnetic strips 2014 can be 4, 5 or 6, etc., and the embodiment of the present disclosure does not specifically limit this. In addition, the length of the shielding magnetic strip 2014 can be equal to or slightly less than the length of the electromagnetic coil 2012 in the direction along the axis of the heating tube 2011. The width of the shielding magnetic strip 2014 can be set according to actual conditions, for example, the width of the shielding magnetic strip 2014 can be 5 mm, 8 mm or 10 mm, etc., and the embodiment of the present disclosure does not specifically limit this.

[0076] In addition, the heating tube 2011 can be a 430 stainless steel heating tube and the outer surface is plated with an anti-corrosion layer. Since 430 stainless steel not only meets the medical grade hygiene standards, but also has good thermal conductivity, magnetic conductivity and corrosion resistance. When the heating tube 101 is made of 430 stainless steel, when the electromagnetic coil 102 is used to heat the medium in the heating tube 101, the heat energy can be quickly introduced into the inside of the heating tube 101, so that the water in the heating tube 101 can be quickly heated, further improving the heating efficiency of the heater 201 and reducing the heating time of the heater 201. Plating the anti-corrosion layer on the outer surface of the heating tube 201 can make the heating tube 201 resistant to high temperatures while improving the acid resistance, alkali resistance and corrosion resistance of the heating tube 2011.

[0077] The anti-corrosion layer may be a chrome anti-corrosion layer, and the thickness thereof may be greater than 20 microns. Chromium has the characteristics of high corrosion resistance and low cost. The chrome plating on the outside of the heating tube 2011 not only increases the corrosion resistance of the heating tube 2011, but also makes the heater 201 easy to process and has low cost. The thickness of the anti-corrosion layer is greater than 20 microns, which further improves the corrosion resistance of the heating tube 2011. The anti-corrosion layer may also be made of other materials, such as Teflon, etc., which is not specifically limited in the embodiments of the present disclosure.

[0078] The heater 201 is composed of a heating tube 2011, an electromagnetic coil 2012, heat-insulating cotton 2013 and a plurality of shielding magnetic strips 2014. The heat-insulating cotton 2013 isolates the heating tube 2011 from the electromagnetic coil 2012, so that the electromagnetic coil 2012 can generate a changing magnetic field when powered on. When the magnetic lines of force in the changing magnetic field pass through the heating tube 2011, eddy currents are generated at the heating tube 2011, and the eddy currents generate heat energy, thereby heating the medium in the heating tube 2011, such as water. The heater 201 has a simple structure and is easy to process, and the shielding magnetic strips 2014 effectively prevent the magnetic lines of force generated by the electromagnetic coil 2012 from radiating in a direction away from the heating tube 2011, thereby reducing the heat loss of the heater 201 and improving the heating efficiency of the heater 201, thereby reducing the duration and power consumption of the thermal disinfection process of the water treatment equipment.

[0079] In one embodiment, the water treatment equipment further includes a primary three-way valve DV01 , a primary short-circuit bypass 305 , a secondary three-way valve DV02 , a secondary bypass short circuit 405 , a return water three-way valve DV03 and a return water bypass short circuit 502 .

[0080] Among them, the primary three-way valve DV01 includes a primary bypass valve port 2, and a primary water inlet valve port 1 and a primary water outlet valve port 3 connected to the primary water inlet pipeline 302, and a primary short-circuit bypass 305 connects the primary bypass valve port 2 with the secondary water inlet pipeline 402. The secondary three-way valve DV02 includes a secondary bypass valve port 2, and a secondary water inlet valve port 1 and a secondary water outlet valve port 3 connected to the secondary water inlet pipeline 402, and a secondary short-circuit bypass 405 connects the secondary bypass valve port 2 with the primary water inlet pipeline 302. The return water three-way valve DV03 includes a return water bypass valve port 2, and a return water inlet valve port 1 and a return water outlet valve port 3 connected to the rear-stage water supply pipeline 501, and a return water short-circuit bypass 502 connects the return water bypass valve port 2 with the rear-stage water supply pipeline 501.

[0081] In the present disclosure, Figure 1 As shown, the water treatment equipment also includes: a first switch valve SV01 and a first regulating valve NV1 arranged on the primary waste discharge pipeline 303, a first one-way valve CV1 arranged on the secondary water inlet pipeline 402, a second one-way valve CV4 and a second regulating valve NV2 arranged on the secondary concentrated water first return pipeline 403, a third regulating valve NV3 and a third one-way valve CV5 arranged on the secondary concentrated water second return pipeline 404, a fourth one-way valve CV3, a fifth one-way valve CV2 and a sixth one-way valve CV7 arranged on the rear-stage water supply pipeline 501 and located between the water-using equipment and the secondary reverse osmosis membrane group 401, and a seventh one-way valve CV8 arranged on the rear-stage transfer pipeline 501 and located between the water-using equipment and the radiator 201.

[0082] In the disclosed embodiment, the water treatment equipment may also include a first sampling branch and a second sampling branch connected to the rear-stage water supply pipeline 501, wherein the first sampling branch is close to the secondary pure water outlet 4013, and the second sampling branch is close to the water-using equipment. The water treatment equipment also includes a third sampling branch connected to the secondary water inlet pipeline 402. Among them, a second switch valve PM2 is provided on the first sampling branch, a fourth regulating valve NV4 is provided on the second sampling branch, and a third switch valve PM1 is provided on the third sampling branch. A switch valve is provided on each sampling branch, so that the operator can extract water samples from the pure water in the pipeline by opening the switch valve on the sampling branch, and then perform relevant water quality tests.

[0083] In one embodiment, the water treatment equipment further includes a pressure regulating valve UV2, which is disposed on the rear-stage water supply pipeline 501 and is located between the return water three-way valve DV03 and the water tank 101. The pressure regulating valve UV2 is used to adjust the pressure in the rear-stage water supply pipeline 501, and by adjusting the opening of the opening and closing member in the pressure regulating valve UV2, the pressure in the rear-stage water supply pipeline 501 is maintained within a preset range, thereby preventing the pressure in the rear-stage water supply pipeline 501 from being too high or too low.

[0084] In the present disclosure, Figure 1 The pipeline connection points shown in the figure, the first-level water inlet 3011, the first-level concentrated water outlet 3012 and the first-level pure water outlet 3011 of the first-level reverse osmosis membrane group 301, and the second-level water inlet 4011, the second-level concentrated water outlet 4012 and the second-level pure water outlet 4013 of the second-level reverse osmosis membrane group 401 are drawn schematically and do not represent the actual positions. They can be adjusted according to design requirements under the premise of unchanged pressure.

[0085] In the embodiments of the present disclosure, the specific type of each valve component is not limited. For example, the primary three-way valve DV01 and the secondary three-way valve DV02 can be three-way ball valves or other types, and the embodiments of the present disclosure do not specifically limit this. The above-mentioned valve components 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, which can control one or more valve components to be in a corresponding working state according to the input mode of the water treatment equipment and the set program, thereby realizing automatic control of the water treatment equipment, improving its working efficiency, and making the operation more convenient.

[0086] In one embodiment, the water treatment equipment further includes a thermal disinfection circulation pump M4 provided on the rear-stage water supply pipeline 501 .

[0087] In one embodiment, the working modes of the water treatment equipment include a water treatment working mode, a whole machine disinfection mode and a pipeline disinfection mode, wherein:

[0088] In the water treatment working mode, the heater 201 is closed, the first-level water inlet valve port 1 and the first-level water outlet valve port 3 of the first-level three-way valve DV01 are opened, the first-level bypass valve port 2 is closed, the first-level booster pump M1 and the second-level booster pump M2 are opened, the second-level water inlet valve port 1 and the second-level water outlet valve port 3 of the second-level three-way valve DV02 are opened, the second-level bypass valve port 2 is closed, the thermal disinfection circulation pump M4 is closed, the return water inlet valve port 1 and the return water outlet valve port 3 of the return water three-way valve DV03 are opened, and the return water bypass valve port 2 is closed.

[0089] In the whole machine disinfection mode, the heater 201 is turned on, the first-level water inlet valve port 1 and the first-level water outlet valve port 3 of the first-level three-way valve DV01 are opened, the first-level bypass valve port 2 is closed, the first-level booster pump M1 and the second-level booster pump M2 are turned on, the second-level water inlet port 1 and the second-level water outlet port 3 of the second-level three-way valve DV02 are opened, the second-level bypass valve port 2 is closed, the thermal disinfection circulation pump M4 is closed, the return water inlet port 1 and the return water outlet port 3 of the return water three-way valve DV03 are opened, and the return water bypass valve port 2 is closed.

[0090] In the pipeline disinfection mode, within the first preset time period, the heater 201 is turned off, the first-level water inlet valve port 1 and the first-level water outlet valve port 3 of the first-level three-way valve DV01 are opened, the first-level bypass valve port 2 is closed, the first-level booster pump M1 and the second-level booster pump M2 are turned on, the second-level water inlet valve port 1 and the second-level water outlet valve port 3 of the second-level three-way valve DV02 are opened, the second-level bypass valve port 2 is closed, the thermal disinfection circulation pump M4 is turned off, the return water inlet valve port 1 and the return water outlet valve port 3 of the return water three-way valve DV03 are opened, and the return water bypass valve port 2 is closed.

[0091] In the second preset time period after the first preset time period, the heater 201 and the thermal disinfection circulation pump M4 are turned on, the return water inlet valve port 1 and the return water bypass valve port 2 of the return water three-way valve DV03 are opened, the return water outlet valve port 3 is closed, and the first-level booster pump M1, the second-level booster pump M2, the first-level three-way valve DV01 and the second-level three-way valve DV02 are all closed.

[0092] In the embodiment of the present disclosure, in the working mode, if Figure 3 As shown, water flows out of the water tank 101, enters the primary reverse osmosis membrane group 301 through the primary water inlet pipe 302 under the action of the primary booster pump M1 and undergoes primary filtration, and the water after primary filtration flows out from the primary pure water outlet 3013, enters the secondary reverse osmosis membrane group 401 through the secondary water inlet pipe 402 under the action of the secondary pressure pump M2 and undergoes secondary filtration, and part of the water after secondary filtration enters the water-using equipment through the rear water supply pipe 501, and part of it returns to the water tank 101. In the working mode, in order to prevent the water entering the water-using equipment from heating up, the heater 201 is not turned on.

[0093] In the whole machine disinfection mode, Figure 3 As shown, water flows out of the water tank 101, enters the first-level reverse osmosis membrane group 301 through the first-level water inlet pipe 302 under the action of the first-level booster pump M1 and undergoes first-level filtration. The water after the first-level filtration flows out from the first-level pure water outlet 3013, enters the second-level reverse osmosis membrane group 401 through the second-level water inlet pipe 402 under the action of the second-level pressure pump M2 and undergoes second-level filtration. The water after the second-level filtration flows through the rear-stage water supply pipe 501. At this time, the heater 201 is turned on and heats the water flowing through the rear-stage water supply pipe 501, so that the heated water returns to the water tank 101. After repeating multiple cycles, the water in the water tank 101 reaches the disinfection temperature, such as above 85°C. At this time, the water that reaches the disinfection temperature flows out of the water tank 101, flows through each pipeline, the first-level reverse osmosis membrane group 301 and the second-level reverse osmosis membrane group 401, and disinfects each pipeline, the first-level reverse osmosis membrane group 301 and the second-level reverse osmosis membrane group 401. In addition, in order to achieve a sterilization effect, the working time and power of the heater 201 can also be adjusted so that the water flowing through each pipeline reaches a sterilization temperature, such as above 120° C., to achieve sterilization of each pipeline.

[0094] Among them, the water temperature in the water tank 101 is related to the output power and heating time of the heater 201. In order to make the water tank 101 reach the target temperature quickly, the temperature of the water outlet of the heater 201 and the temperature of the water in the water tank 101 can be collected. If the temperature of the water outlet of the heater 201 is lower than the target temperature, the output power of the heater 201 is adjusted to the highest. If the temperature of the water outlet of the heater 201 is higher than the target temperature, the output power and heating time of the heater 201 are adjusted according to the temperature of the water in the water tank 101.

[0095] In the pipeline disinfection mode, a relatively small range of disinfection is carried out in the water treatment equipment, mainly disinfecting the rear-stage water supply pipeline 501 and the return water bypass short circuit 502. In the first preset time period, in order to ensure that there is water for disinfection in the rear-stage water supply pipeline 501 and the return water bypass short circuit 502, such as Figure 3 As shown, water flows out of the water tank 101, enters the first-level reverse osmosis membrane group 301 through the first-level water inlet pipe 302 under the action of the first-level booster pump M1 and undergoes first-level filtration. The water after the first-level filtration flows out from the first-level pure water outlet 3013, enters the second-level reverse osmosis membrane group 401 through the second-level water inlet pipe 402 under the action of the second-level pressure pump M2 and undergoes second-level filtration. The water after the second-level filtration enters the rear-stage water supply pipe 501.

[0096] After ensuring that there is water in the rear-stage water supply pipeline 501, in the second preset time period, Figure 4 As shown, the return water outlet valve port 3 of the return water three-way valve DV03 is closed to prevent the water in the rear-stage water supply pipeline 501 from flowing back into the water tank 101, and at the same time, the return water bypass valve port 2 of the return water three-way valve DV03 is opened to allow water to enter the return water bypass short circuit 502, and then the heater 201 is turned on to heat the water in the rear-stage water supply pipeline 501, and at the same time, the thermal disinfection circulation pump M4 is turned on. The thermal disinfection circulation pump M4 pushes the water in the rear-stage water supply pipeline 501 to circulate continuously in the rear-stage water supply pipeline 501 and the return water bypass short circuit 502, so that the rear-stage water supply pipeline 501 and the return water bypass short circuit 502 reach the disinfection temperature or sterilization temperature, thereby realizing the disinfection of the rear-stage water supply pipeline 501 and the return water bypass short circuit 502.

[0097] The duration of the first preset time period and the duration of the second preset time period can be set according to actual conditions, such as 1 minute, 3 minutes or 3.5 minutes, etc., and the embodiment of the present disclosure does not make specific limitations on this.

[0098] In one embodiment, the water treatment equipment further includes a disinfection waste discharge pipeline 701 connected to the rear-stage water supply pipeline 501, and a fourth switch valve SV03 and a fourth regulating valve NV6 are provided on the disinfection waste discharge pipeline 701. After the pipeline disinfection mode, the fourth switch valve SV03 is opened to discharge the waste water in the rear-stage water supply pipeline 501 and the return water bypass pipeline 502 through the disinfection waste discharge pipeline 701.

[0099] In one embodiment, the water treatment equipment also includes an exhaust valve EV1. In the whole machine disinfection mode and the pipeline disinfection mode, the temperature in each pipeline rises, causing the air pressure in each pipeline to rise. To prevent the air pressure in each pipeline from being too high, the hot air in each pipeline can be discharged through the exhaust valve EV1 to achieve a pressure reduction effect.

[0100] In one embodiment, the water treatment equipment further includes a primary failure mode and a secondary failure mode.

[0101] Among them, in the first-level fault mode, the heater 201 is closed, the first-level water inlet valve port 1 and the first-level bypass valve port 2 of the first-level three-way valve DV01 are opened, the first-level water outlet valve port 3 is closed, the first-level booster pump M1 is closed, the second-level booster pump M2 is opened, the second-level three-way valve DV02 and the thermal disinfection circulation pump are closed, the return water inlet valve port 1 and the return water outlet valve port 3 of the return water three-way valve DV03 are opened, and the return water bypass valve port 3 is closed.

[0102] In the secondary fault mode, the heater 201 is closed, the secondary water inlet valve port 1 and the secondary bypass valve port 2 of the secondary three-way valve DV02 are opened, the secondary water outlet valve port 3 is closed, the secondary booster pump M2 is closed, the primary booster pump M1 is opened, the primary three-way valve DV01 and the thermal disinfection circulation pump are closed, the return water inlet valve port 1 and the return water outlet valve port 3 of the return water three-way valve DV03 are opened, and the return water bypass valve port 3 is closed.

[0103] In the embodiment of the present disclosure, the primary failure mode indicates that a problem occurs in the primary reverse osmosis membrane group 301. Figure 5 As shown, at this time, the water flowing out of the water tank 101 will not pass through the primary reverse osmosis membrane group 301, but will directly flow into the secondary reverse osmosis membrane group 401, and will be filtered by the secondary reverse osmosis membrane group 401. Among the filtered water, part of it will be supplied to the water-using equipment through the subsequent water supply pipeline 501, and part of it will flow back into the water tank 101.

[0104] The secondary failure mode indicates that a problem occurs in the secondary reverse osmosis module 302. Figure 6 As shown, at this time, the water filtered by the first-stage reverse osmosis membrane group 301 is no longer transported to the second-stage reverse osmosis membrane group 401. The first-stage filtered water flows out through the first-stage pure water outlet 3013, part of it is supplied to the water-using equipment through the rear-stage water supply pipeline 501, and part of it flows back to the water tank 101.

[0105] In one embodiment, the water treatment equipment also includes a first pressure detection device P1 arranged on the secondary water inlet pipeline 402, a second pressure device P2 arranged on the rear water supply pipeline 501, a third pressure device P3 arranged on the primary waste discharge pipeline 303, and a fourth pressure device P4 arranged on the secondary concentrated water first return pipeline 403.

[0106] In the embodiment of the present disclosure, the first pressure detection device P1 is used to detect the pressure value of the first-level pure water outlet 3013, the second pressure device P2 is used to detect the pressure value of the second-level pure water outlet 4013, the third pressure device P3 is used to detect the pressure value of the first-level concentrated water side included in the first-level reverse osmosis membrane group 301, and the fourth pressure device P4 is used to detect the pressure value of the second-level concentrated water side included in the second-level reverse osmosis membrane group 401.

[0107] Among them, the specific type of the above-mentioned pressure detection devices is 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.

[0108] The water treatment equipment provided in the embodiments of the present disclosure can be used not only in hemodialysis systems that have extremely high requirements for purified water, but also in other occasions that have high requirements for purified water, including but not limited to pharmaceutical workshops, food processing workshops, biochemical workshops, etc.

[0109] In order to achieve disinfection and sterilization of water treatment equipment while ensuring the water quality and service life of the produced water, thereby improving the use effect of the water treatment equipment, the embodiment of the present disclosure also provides a hemodialysis system, including the water treatment equipment of any of the above embodiments. Since the water treatment equipment has the above beneficial effects, the hemodialysis system has a good treatment effect.

[0110] 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 any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0111] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the protection scope of the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure are included in the protection scope of the present disclosure.

Claims

1. A water treatment device, characterized in that: It includes a water tank, a heater, a first-stage reverse osmosis membrane group, a second-stage reverse osmosis membrane group, a first-stage booster pump, a flow-increasing pump, a second-stage booster pump, a first-stage water inlet pipeline, a first-stage wastewater discharge pipeline, a first-stage concentrated water return pipeline, a second-stage water inlet pipeline, a second-stage concentrated water first return pipeline, a second-stage concentrated water second return pipeline and a rear-stage water supply pipeline, including: The primary reverse osmosis membrane group comprises a primary water inlet, a primary concentrated water outlet and a primary pure water outlet; The secondary reverse osmosis membrane group comprises a secondary water inlet, a secondary concentrated water outlet and a secondary pure water outlet; The primary water inlet pipeline is connected to the primary water inlet and the water outlet of the water tank, the primary booster pump is arranged on the primary water inlet pipeline, and the flow booster pump is also arranged on the primary water inlet pipeline and is located between the primary booster pump and the primary water inlet; The first-level waste discharge pipeline is connected to the first-level concentrated water outlet; The primary concentrated water return pipeline is connected to the primary concentrated water outlet and the primary water inlet; The secondary water inlet pipeline is connected to the primary pure water outlet and the secondary water inlet, and the secondary booster pump is arranged on the secondary water inlet pipeline; The rear-stage water supply pipeline is connected to the secondary pure water outlet and the water-using equipment, and is connected to the secondary pure water outlet and the water tank; The heater is arranged on the rear-stage water supply pipeline and is located between the water-using equipment and the water tank; The secondary concentrated water first return pipe is connected to the secondary concentrated water outlet and the secondary water inlet, and the secondary concentrated water second return pipe is connected to the secondary concentrated water outlet and the water inlet of the water tank; Also includes: A primary three-way valve, comprising a primary bypass valve port, a primary water inlet valve port and a primary water outlet valve port connected to the primary water inlet pipeline, and A primary short-circuit bypass is provided to connect the primary bypass valve port with the secondary water inlet pipeline; A secondary three-way valve, including a secondary bypass valve port, and a secondary water inlet valve port and a secondary water outlet valve port connected to the secondary water inlet pipeline, and A secondary short-circuit bypass is provided to connect the secondary bypass valve port with the primary water inlet pipeline; A return water three-way valve, comprising a return water bypass valve port, and a return water inlet valve port and a return water outlet valve port connected to the rear-stage water supply pipeline, and The return water short-circuit bypass connects the return water bypass valve port with the subsequent water supply pipeline; It also includes a thermal disinfection circulation pump provided on the rear-stage water supply pipeline; The working modes of the water treatment equipment include water treatment working mode, whole machine disinfection mode and pipeline disinfection mode, wherein: In the water treatment working mode, the heater is turned off, the first-level water inlet valve port and the first-level water outlet valve port of the first-level three-way valve are opened, the first-level bypass valve port is closed, the first-level booster pump and the second-level booster pump are opened, the second-level water inlet valve port and the second-level water outlet valve port of the second-level three-way valve are opened, the second-level bypass valve port is closed, the thermal disinfection circulation pump is turned off, the return water inlet valve port and the return water outlet valve port of the return water three-way valve are opened, and the return water bypass valve port is closed; In the whole machine disinfection mode, the heater is turned on, the first-level water inlet valve port and the first-level water outlet valve port of the first-level three-way valve are opened, the first-level bypass valve port is closed, the first-level booster pump and the second-level booster pump are turned on, the second-level water inlet and the second-level water outlet of the second-level three-way valve are opened, the second-level bypass valve port is closed, the thermal disinfection circulation pump is closed, the return water inlet and the return water outlet of the return water three-way valve are opened, and the return water bypass valve port is closed; In the pipeline disinfection mode, within a first preset time period, the heater is turned off, the first water inlet valve port and the first water outlet valve port of the first-level three-way valve are opened, the first-level bypass valve port is closed, the first-level booster pump and the second-level booster pump are opened, the second-level water inlet valve port and the second-level water outlet valve port of the second-level three-way valve are opened, the second-level bypass valve port is closed, the thermal disinfection circulation pump is turned off, the return water inlet valve port and the return water outlet valve port of the return water three-way valve are opened, and the return water bypass valve port is closed; In a second preset time period after the first preset time period, the heater and the thermal disinfection circulation pump are turned on, the return water inlet valve port and the return water bypass valve port of the return water three-way valve are opened, the return water outlet valve port is closed, and the first-level booster pump, the second-level booster pump, the first-level three-way valve and the second-level three-way valve are all closed.

2. The water treatment equipment according to claim 1, characterized in that: The heater is an electromagnetic heater.

3. The water treatment equipment according to claim 2, characterized in that: The heater includes a plurality of heating units, each of which includes a heating pipe arranged on a rear-stage water supply pipeline, an electromagnetic coil, heat insulation cotton and a plurality of shielding magnetic strips, wherein: The heat insulation cotton is wrapped around the outside of the heating tube; The electromagnetic coil is wound around a side of the heat insulation cotton away from the heating tube; The multiple shielding magnetic strips are located on a side of the electromagnetic coil away from the thermal insulation cotton. The multiple shielding magnetic strips are evenly arranged along the circumference of the electromagnetic coil, and the extension direction is parallel to the axial direction of the heating tube.

4. The water treatment equipment according to claim 1, characterized in that: Also includes a pressure regulating valve; The pressure-stabilizing valve is arranged on the rear-stage water supply pipeline, and the pressure-stabilizing valve is located between the return water three-way valve and the water tank.

5. The water treatment equipment according to claim 1, characterized in that: It also includes a disinfection and waste discharge pipeline connected to the rear-stage water supply pipeline.

6. The water treatment equipment according to claim 1, characterized in that: It also includes a first pressure detection device arranged on the secondary water inlet pipeline, a second pressure device arranged on the rear water supply pipeline, a third pressure device arranged on the primary waste discharge pipeline and a fourth pressure device arranged on the secondary waste discharge pipeline.

7. A hemodialysis system, characterized in that: The water treatment device comprises the water treatment device according to any one of claims 1 to 6.

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