Pure water maintenance device of water treatment equipment for hemodialysis and related treatment

Abstract

The utility model discloses a pure water maintenance device of water treatment equipment for hemodialysis and related treatment. The pure water maintenance device mainly comprises a circulating water tank, a primary reverse osmosis module, a secondary reverse osmosis module, a pure water conveying pipeline and a control valve, a conductivity sensor CTO, a temperature sensor TTO and a liquid level sensor PTO are arranged in the pure water maintenance device and the circulating water tank; the pure water conveying pipeline is respectively connected with the primary reverse osmosis module and the secondary reverse osmosis module, when the primary water production pressure is higher than a set value of a pressure switch PSI, a secondary high-pressure pump is started, and one end of the pure water conveying pipeline is connected with a circulating water tank and is controlled by an electric valve Y7. Compared with the prior art, the utility model has the beneficial effects that when the reverse osmosis membrane is standby at night, pure water is used for maintaining the reverse osmosis membrane, so that the scale formation on the surface of the membrane and the biological pollution of the membrane can be effectively reduced, colloid and particulate matters are prevented from being polluted and blocked, the permeability of the membrane is kept, the stability of water yield and desalination rate of the system is ensured, and the service life of the membrane is prolonged.

Description

Technical Field

[0001] The utility model relates to medical equipment, in particular to a pure water maintenance device for hemodialysis and related therapeutic water treatment equipment. Background Art

[0002] After long-term use, the reverse osmosis membrane will be scaled on the surface and cause biological contamination of the membrane. If it is not cleaned in time, it will cause colloid and particulate matter fouling, reduce the permeability of the membrane, affect the system water production and desalination rate stability, and also affect the service life of the membrane. Utility Model Content

[0003] The purpose of the utility model is to provide a pure water maintenance device for hemodialysis and related therapeutic water treatment equipment. When the pure water is in standby mode, the reverse osmosis membrane can be maintained, which can effectively reduce scaling on the membrane surface and biological contamination of the membrane, prevent clogging by colloids and particulate matter, maintain the permeability of the membrane, ensure the stability of the system water production and desalination rate, and extend the service life of the membrane.

[0004] The technical solution of the utility model is achieved as follows: the water treatment equipment produces water through double-stage reverse osmosis membrane filtration during the day, and the pure water is transported to the dialysis machine in a direct supply large circulation mode, and the excess pure water returns to the circulating water tank through the pipeline.

[0005] The pure water maintenance device is mainly composed of a circulating water tank, a first-level reverse osmosis module, a second-level reverse osmosis module, a pure water delivery pipeline and a control valve; the circulating water tank is provided with a conductivity sensor CTO, a temperature sensor TTO and a liquid level sensor PTO; the circulating water tank is connected to the pure water delivery pipeline and is provided with a disinfection and cleaning valve Y2, the pure water delivery pipeline is respectively connected to the first-level reverse osmosis module and the second-level reverse osmosis module, the circulating water tank is connected to the softened water delivery pipeline and is provided with an inlet valve Y1, the circulating water tank and the first-level reverse osmosis module and the high-pressure pump M1 constitute a first-level reverse osmosis circulation pipeline, the first-level reverse osmosis circulation pipeline is provided with a control valve Y6, the circulating water tank and the second-level reverse osmosis module and the high-pressure pump M2 constitute a second-level reverse osmosis circulation pipeline, the second-level reverse osmosis circulation pipeline is provided with a control valve Y5 and a pressure switch PS1; a number of diaphragm valves are provided on the first-level reverse osmosis circulation pipeline and the second-level circulation pipeline, one end of the pure water delivery pipeline is connected to the circulating water tank and is controlled by an electric valve Y7.

[0006] Furthermore, a sampling valve PH1 and a sampling valve PH2 are provided on the primary reverse osmosis circulation pipeline and the secondary circulation pipeline.

[0007] Furthermore, a conductivity sensor CT1 and a conductivity sensor CT2 are provided on the pure water delivery pipeline.

[0008] Furthermore, a sampling valve PH3 is provided on the pipeline at the front end of the disinfectant cleaning valve Y2.

[0009] Compared with the existing technology, the beneficial effects of the present invention are: when on standby at night, pure water is used to maintain the reverse osmosis membrane, which can effectively reduce scaling on the membrane surface and biological contamination of the membrane, prevent clogging by colloids and particulate matter, maintain the permeability of the membrane, ensure the stability of the system water production and desalination rate, and extend the service life of the membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 It is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0012] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0013] like Figure 1 As shown, a pure water maintenance device for hemodialysis and related treatment water treatment equipment mainly consists of a circulating water tank 11, a primary reverse osmosis module 33, a secondary reverse osmosis module 44, a pure water delivery pipeline 22 and a control valve; a conductivity sensor CTO, a temperature sensor TTO and a liquid level sensor PTO are installed in the circulating water tank;

[0014] The circulating water tank is connected to the pure water delivery pipeline and is equipped with a disinfectant cleaning valve Y2. The pure water delivery pipeline is connected to the primary and secondary reverse osmosis modules, respectively. The circulating water tank is connected to the softened water delivery pipeline and is equipped with an inlet valve Y1. The circulating water tank, the primary reverse osmosis module, and the high-pressure pump M1 form the primary reverse osmosis circulation pipeline, which is equipped with a control valve Y6. The circulating water tank, the secondary reverse osmosis module, and the high-pressure pump M2 form the secondary reverse osmosis circulation pipeline, which is equipped with a control valve Y5 and a pressure switch PS1. Several diaphragm valves NV are installed in the primary and secondary reverse osmosis circulation pipelines. One end of the pure water delivery pipeline is connected to the circulating water tank and is controlled by an electric valve Y7. Sampling valves PH1 and PH2 are installed in the primary and secondary reverse osmosis circulation pipelines. Conductivity sensors CT1 and CT2 are installed in the pure water delivery pipeline. A sampling valve PH3 is installed in the pipeline upstream of the disinfectant cleaning valve Y2.

[0015] The water treatment equipment produces water through double-stage reverse osmosis membrane filtration during the day. Pure water is delivered to the dialysis machine in a direct large-circulation manner, and excess pure water is returned to the circulating water tank through pipelines.

[0016] Two-stage water production process: The Y1 inlet valve opens, and softened water filtered by the pretreatment system enters the circulating water tank. When the tank reaches the high level, the Y1 inlet valve closes, the control valve Y6 and the drain valve Y3 open, and the primary high-pressure pump M1 starts. When the primary water pressure exceeds the PSI set point of the pressure switch, the secondary high-pressure pump M2 starts. The primary concentrate is discharged through the drain valve Y3. To increase the system recovery rate, a portion of the secondary concentrate is returned to the secondary high-pressure pump, and a portion is returned to the primary high-pressure pump.

[0017] When the water treatment equipment enters nighttime standby mode, inlet valve Y1 closes and purge valve Y2 opens. After draining the circulating water tank, purge valve Y2 closes. Control valve Y6 closes, electric valve Y7 opens, high-pressure pump M1 starts, and drain valve Y3 and control valve Y5' open to discharge the primary concentrate. When the primary reverse osmosis membrane's water pressure exceeds the set pressure of the PSI pressure switch, high-pressure pump M2 starts, producing water from the dual-stage reverse osmosis process. Pure water flows through the delivery pipeline to the circulating water tank. When the circulating water tank reaches the upper liquid level, high-pressure pumps M1 and M2 stop, and electric valve Y7 and drain valve Y3 close. The circulating water tank and pure water delivery pipeline are filled with pure water.

[0018] Then, control valve Y6 opens, high-pressure pump M1 starts, and drain valve Y3 opens, flushing the primary reverse osmosis membrane assembly with pure water from the circulating water tank. When the circulating water tank reaches the middle level, control valve Y6 closes, high-pressure pump M1 stops, and the primary membrane assembly is now fully immersed in pure water.

[0019] Then, control valves Y5 and Y5' open, and high-pressure pump M2 starts, flushing the secondary reverse osmosis membrane assembly with pure water from the circulating water tank. When the circulating water tank reaches the lower liquid level, control valves Y5 and Y5' close, and high-pressure pump M2 stops. At this point, the secondary membrane assembly is fully immersed in pure water.

[0020] If the water in the membrane module and pipeline is stagnant for too long, it is easy to breed bacteria. Therefore, the system is started at intervals, and the two-stage operation is carried out at regular intervals, and then stopped after a period of operation to prevent the system from breeding bacteria.

[0021] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pure water maintenance device for hemodialysis and related therapeutic water treatment equipment, characterized in that: It is mainly composed of a circulating water tank, a first-stage reverse osmosis module, a second-stage reverse osmosis module, pure water delivery pipelines and control valves; The circulating water tank is equipped with a conductivity sensor CTO, a temperature sensor TTO, and a liquid level sensor PTO; The circulating water tank is connected to the pure water delivery pipeline and is equipped with a disinfection and cleaning valve Y2. The pure water delivery pipeline is respectively connected to the primary reverse osmosis module and the secondary reverse osmosis module. The circulating water tank is connected to the softened water delivery pipeline and is equipped with an inlet valve Y1. The circulating water tank, the primary reverse osmosis module and the high-pressure pump M1 constitute a primary reverse osmosis circulation pipeline. The primary reverse osmosis circulation pipeline is equipped with a control valve Y6. The circulating water tank, the secondary reverse osmosis module and the high-pressure pump M2 constitute a secondary reverse osmosis circulation pipeline. The secondary reverse osmosis circulation pipeline is equipped with a control valve Y5 and a pressure switch PS1; several diaphragm valves NV are provided on the primary reverse osmosis circulation pipeline and the secondary circulation pipeline. One end of the pure water delivery pipeline is connected to the circulating water tank and is controlled by an electric valve Y7.

2. The pure water maintenance device for hemodialysis and related therapeutic water treatment equipment according to claim 1, characterized in that: A sampling valve PH1 and a sampling valve PH2 are provided on the primary reverse osmosis circulation pipeline and the secondary circulation pipeline.

3. The pure water maintenance device for hemodialysis and related treatment water treatment equipment according to claim 1, characterized in that: The pure water delivery pipeline is provided with conductivity sensor CT1 and conductivity sensor CT2.

4. The pure water maintenance device for hemodialysis and related treatment water treatment equipment according to claim 1, characterized in that: A sampling valve PH3 is provided on the pipeline at the front end of the disinfectant cleaning valve Y2.

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