Double-circulation disinfection system for hemodialysis water treatment

Abstract

A double-circulation disinfection system for hemodialysis water treatment relates to the field of water treatment and comprises a pretreatment system, a balanced reservoir, a constant pressure pump, a first-stage reverse osmosis membrane filtering mechanism and a second-stage reverse osmosis membrane filtering mechanism which are sequentially connected in series through a pipeline, a discharge port with a drain valve is arranged on the balanced reservoir, and the double-circulation disinfection system is characterized in that the constant pressure pump is connected with the first-stage reverse osmosis membrane filtering mechanism and the second-stage reverse osmosis membrane filtering mechanism. The disinfection system comprises a disinfectant disinfection system and a high-temperature disinfection system, and bypass pipelines with valves are connected in front of a water inlet valve at the water inlet end of the first-stage reverse osmosis membrane filtering mechanism and behind a water outlet valve at the water outlet end of the second-stage reverse osmosis membrane filtering mechanism. Compared with the prior art, the utility model has the advantages that the sterilization and disinfection are thorough, and the residual disinfectant can be effectively removed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of water treatment, especially is hemodialysis water treatment double cycle disinfection system. BACKGROUND

[0002] At present, when the hemodialysis water treatment system of hemodialysis specialty supplies dialysate (or dialysis concentrate) for each dialysis machine, mainly adopts the mode that each dialysis machine is connected in series by large circulation pipeline.When the pipeline needs to be disinfected or the dialysate in the circulation pipe circulates, the liquid in the pipeline is pushed by the circulating pump in the main machine;

[0003] Because the health requirement of hemodialysis high-purity water is extremely strict, and the pipeline in the hemodialysis water treatment system has the danger of breeding bacteria after being used for a period of time, therefore, the pipeline needs to be sterilized and disinfected regularly;

[0004] And the mode of sterilization and disinfection treatment mainly has the sterilization and disinfection treatment of putting disinfectant, the sterilization and disinfection treatment of the acid water containing chlorine produced by acidolysis production mechanism, first, the sterilization and disinfection treatment of single disinfectant is prone to the problem of incomplete sterilization and disinfection, and the reverse osmosis membrane cannot be disinfected to avoid damaging the reverse osmosis membrane, second, after disinfection, even if the pipeline is flushed with ultrapure water first, there will be the influence of residual disinfectant when initially used. SUMMARY

[0005] The utility model discloses a kind of hemodialysis water treatment double cycle disinfection systems, which can be completely sterilized and disinfected, and can effectively remove residual disinfectant.

[0006] The utility model discloses a hemodialysis water treatment double -cycle disinfection system is realized, including the pretreatment system, the balance water tank, the first constant pressure pump's reverse osmosis membrane filtration mechanism of having, the second constant pressure pump's reverse osmosis membrane filtration mechanism of having, is provided with the discharge port with the drain valve on the balance water tank, including disinfection system, its special feature lies in disinfection system, disinfection system includes disinfectant disinfection system, high temperature disinfection system, and disinfectant disinfection system includes disinfectant feeding device, the valve is arranged between the pretreatment system and the balance water tank, and the feeding port of disinfectant feeding device is connected on the pipeline between the first constant pressure pump and the balance water tank, and the water inlet valve and the water outlet valve are arranged respectively at the water inlet end of the first reverse osmosis membrane filtration mechanism and the water outlet end of the second reverse osmosis membrane filtration mechanism, and the bypass pipeline with valve is connected before the water inlet valve of the water inlet end of the first reverse osmosis membrane filtration mechanism and behind the water outlet valve of the water outlet end of the second reverse osmosis membrane filtration mechanism, and the backflow pipeline is connected between the water outlet valve of the water outlet end of the second reverse osmosis membrane filtration mechanism and the balance water tank, and the heating device of one or more than one in the heating device set up in the pipeline outside behind the balance water tank and the heating device set up in the backflow pipeline outside is high temperature disinfection system, and the low-pressure water pump is arranged between the balance water tank and the first constant pressure water pump of the first reverse osmosis membrane filtration mechanism, and the low-pressure water pump is connected in series between the balance water tank and the first constant pressure pump, and the water outlet of the low-pressure water pump is connected in the water inlet of the second constant pressure pump through the first stop valve, and the wastewater outlet of the first reverse osmosis membrane filtration mechanism is connected with the backflow pipeline through the second stop valve, and the wastewater outlet of the second reverse osmosis membrane filtration mechanism is connected with the backflow pipeline through the third stop valve, and the residual chlorine detection sensor of detecting water residual chlorine and the temperature detection sensor of detecting water temperature are set up on the backflow pipeline,

[0007] When disinfecting, first disinfectant disinfection process is carried out, under the control of control device, first close water inlet valve, water outlet valve and the valve between pretreatment system and balance water tank, open the valve on bypass pipeline, and disinfectant feeding device pours disinfectant into pipeline, and disinfectant mixes in the water from balance water tank, and after constant pressure pump, bypass pipeline, backflow pipeline, backflow to balance water tank, when the amount of disinfectant in water meets the requirement, residual chlorine detection sensor transmits detection signal to control device, and control device controls disinfectant feeding device to stop pouring disinfectant, after containing disinfectant water circulates for a period of time, open the drain valve on the discharge port of balance water tank, open the valve, and containing disinfectant water is discharged, and pretreatment system handles water to supplement at the same time, until containing disinfectant water in system is discharged clean,

[0008] Then, under the control of the control device, the valve and the drain valve are closed, the constant pressure pump is closed, the water inlet valve and the water outlet valve are opened, the first stop valve is closed, the second stop valve is opened, the heating device is opened, and the low-pressure pump is opened until the water is heated to 80-90 DEG C, and the high-temperature hot water flows through the first reverse osmosis membrane filtering mechanism, the wastewater outlet of the first reverse osmosis membrane filtering mechanism, the pipeline, the reflux pipeline, the balance water tank, the constant pressure water pump and the corresponding pipeline for heating and disinfection; the first stop valve is opened, the water inlet valve is closed, and the high-temperature hot water flows through the second reverse osmosis membrane filtering mechanism, the wastewater outlet of the second reverse osmosis membrane filtering mechanism, the pipeline, the reflux pipeline, the balance water tank, the constant pressure water pump and the corresponding pipeline for heating and disinfection.

[0009] After disinfection, the drain valve on the discharge port is opened, and the hot water is discharged, and the blood dialysis centralized liquid supply system after disinfection can be put into normal use.

[0010] The disinfectant disinfection system and the high-temperature disinfection system are used for disinfecting the blood dialysis centralized liquid supply system, which can disinfect the first reverse osmosis membrane filtering mechanism and the second reverse osmosis membrane filtering mechanism, solve the problem of incomplete sterilization and disinfection of single disinfection mode, and further remove residual disinfectant in the system by using heat disinfection.

[0011] Compared with the prior art, the disinfecting system has the advantages of complete sterilization and disinfection and effective removal of residual disinfectant. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structure diagram of the disinfection system of the blood dialysis water treatment double-cycle disinfection system.

[0013] Mark explanation: A-blood dialysis device; B-control device; 1-pipeline; 2-preprocessing system; 3-balance water tank; 4-constant pressure pump; 5-first reverse osmosis membrane filtering mechanism; 6-second reverse osmosis membrane filtering mechanism; 7-drain valve; 8-discharge port; 9-disinfection system; 901-disinfectant disinfection system; 902-high-temperature disinfection system; 10-valve; 11-water inlet valve; 12-water outlet valve; 13-valve; 14-bypass pipeline; 15-reflux pipeline; 16-low-pressure water pump; 17-first stop valve; 18-residual chlorine detection sensor; 19-temperature detection sensor; 20-shunt module; 21-additional heating device; 22-additional temperature detection sensor. DETAILED DESCRIPTION

[0014] The disinfection system of the blood dialysis water treatment double-cycle disinfection system will be further described in detail in combination with the drawings and embodiments:

[0015] For example, Figure 1As shown, the disinfection system of the blood dialysis water treatment double cycle disinfection system is realized, and comprises a pretreatment system 2, a balance water tank 3, a constant pressure pump 4, a first reverse osmosis membrane filtering mechanism 5 and a second reverse osmosis membrane filtering mechanism 6 which are sequentially connected through a pipeline 1, the pretreatment system 2 comprises an ultrafiltration filter and an activated carbon filter, the balance water tank 3 is provided with a discharge port 8 with a discharge valve 7, a wastewater outlet of the first reverse osmosis membrane filtering mechanism 5 is connected with a water inlet of a first constant pressure pump 4 of the first reverse osmosis membrane filtering mechanism 5 through a first adjusting valve 501, the wastewater outlet of the first reverse osmosis membrane filtering mechanism 5 is discharged through a wastewater discharge valve 502, a wastewater outlet of the second reverse osmosis membrane filtering mechanism 6 is connected with a water inlet of a second constant pressure pump 4 of the second reverse osmosis membrane filtering mechanism 5 through a second adjusting valve 601, and the disinfection system 9 is further included.

[0016] The disinfection system 9 comprises a disinfectant disinfection system 901 and a high-temperature disinfection system 902, the disinfectant disinfection system 901 comprises a disinfectant feeding device, a valve 10 is arranged between the pretreatment system 2 and the balance water tank 3, a feeding port of the disinfectant feeding device of the disinfectant disinfection system 901 is connected to the pipeline 1 between the constant pressure pump 4 and the balance water tank 3, a water inlet valve 11 and a water outlet valve 12 are arranged at a water inlet end of the first reverse osmosis membrane filtering mechanism 5 and a water outlet end of the second reverse osmosis membrane filtering mechanism 6 respectively, a bypass pipeline 14 with a valve 13 is connected in front of the water inlet valve 11 of the water inlet end of the first reverse osmosis membrane filtering mechanism 5 and behind the water outlet valve 12 of the water outlet end of the second reverse osmosis membrane filtering mechanism 6, and a backflow pipeline 15 is connected between the water outlet valve 12 of the water outlet end of the second reverse osmosis membrane filtering mechanism 6 and the balance water tank 3.

[0017] The high-temperature disinfection system 902 comprises a heating device arranged outside the pipeline 1 behind the balance water tank 3 and a heating device arranged outside the backflow pipeline 15, a low-pressure water pump 16 is arranged between the balance water tank 3 and the first constant pressure water pump 4 of the first reverse osmosis membrane filtering mechanism 5, the low-pressure water pump 16 is connected in series between the balance water tank 3 and the first constant pressure pump 4, a water outlet of the low-pressure water pump 16 is connected to a water inlet of the second constant pressure pump 4 through a first stop valve 17, a wastewater outlet of the first reverse osmosis membrane filtering mechanism 5 is connected with the backflow pipeline 15 through a second stop valve 17, a wastewater outlet of the second reverse osmosis membrane filtering mechanism 6 is connected with the backflow pipeline 15 through a third stop valve 17, and a residual chlorine detection sensor 18 for detecting residual chlorine of water and a temperature detection sensor 19 for detecting water temperature are arranged on the backflow pipeline 15.

[0018] When disinfecting, firstly, disinfectant disinfection process is carried out, under the control of the control device B, the water inlet valve 11 and the water outlet valve 12 are closed, the valve 10 between the pretreatment system 2 and the balance water tank 3 is closed, the valve 13 on the bypass pipeline 14 is opened, the disinfectant feeding device of the disinfectant disinfection system 901 is fed into the pipeline 1, the disinfectant is mixed into the water from the balance water tank 3, and the water is returned to the balance water tank 3 through the constant pressure pump 4, the bypass pipeline 14 and the return pipeline 15. When the amount of disinfectant in the water meets the requirements, the residual chlorine detection sensor 16 transmits a detection signal to the control device B, and the control device B controls the disinfectant feeding device to stop feeding the disinfectant. After the water containing the disinfectant circulates for a period of time, the disinfection of the system is completed, the drain valve 7 on the discharge port 8 of the balance water tank 3 is opened, the valve 10 is opened, and the water containing the disinfectant is discharged while the water treated by the pretreatment system 2 is supplemented until the water containing the disinfectant in the system is completely discharged.

[0019] Then, under the control of the control device B, the valve 13 and the drain valve 7 are closed, the first constant pressure pump and the second constant pressure pump 4 are closed, the water inlet valve 11 and the water outlet valve 12 are opened, the first stop valve 17 is closed, the second stop valve 17 is opened, the heating device 902 is started, and the low-pressure pump 16 is started until the water is heated to 80-90℃. The high-temperature hot water flows through the first reverse osmosis membrane filtration mechanism 5, the wastewater outlet of the first reverse osmosis membrane filtration mechanism 5, the pipeline 1, the return pipeline 15, the balance water tank 3 and the constant pressure water pump 4 and the corresponding pipelines for heating and disinfection. After the disinfection of the first reverse osmosis membrane filtration mechanism 5 and the related pipelines is completed, the first stop valve 17 is opened, the water inlet valve 11 is closed, and the high-temperature hot water flows through the second reverse osmosis membrane filtration mechanism 6, the wastewater outlet of the second reverse osmosis membrane filtration mechanism 6, the pipeline 1, the return pipeline 15, the balance water tank 3 and the constant pressure water pump 4 and the corresponding pipelines for heating and disinfection.

[0020] After the disinfection of the high-temperature on the first reverse osmosis membrane filtration mechanism 5, the second reverse osmosis membrane filtration mechanism 6 and the related pipelines is completed, the drain valve 7 on the discharge port 8 is opened, and the hot water is discharged, so that the blood dialysis centralized liquid supply system after disinfection can be put into normal use to supply ultrapure water to the blood dialysis device.

[0021] Preferably, a plurality of shunt modules 20 are connected in shunt along the pipeline 1 connected at the water outlet of the second reverse osmosis membrane filtration mechanism 6, the shunt modules 20 supply ultrapure water to the blood dialysis device A, the pipeline 1 connected in shunt with the plurality of shunt modules 20 is provided with a first additional heating device 21 and a first additional temperature detection sensor 22, and the control device B controls the first additional heating device 21 to work according to the temperature measurement signal of the first additional temperature detection sensor 22, so as to ensure that the temperature of the water in the pipeline 1 connected in shunt with the plurality of shunt modules 1 is maintained at a hot disinfection temperature level.

[0022] Preferably, the second additional heating device 21 and the second additional temperature detecting sensor 22 are arranged at the return flow pipeline 15 returning to the balance water tank 3, and the control device B controls the operation of the second additional heating device 21 according to the temperature signal of the second additional temperature detecting sensor 22, so as to ensure that the temperature of the water returning to the balance water tank 3 through the return flow pipeline 15 is kept at the heat sterilization temperature level.

[0023] Due to the technical nature of the centralized liquid supply system, the pipeline 1 outside the water outlet of the secondary reverse osmosis membrane filtration mechanism 6 is relatively long. Even if the pipeline 1 is provided with heat preservation measures, the water temperature will be lost after the water flows through the pipeline 1, which results in that the water temperature of the initially heated water is not high enough to complete the high-temperature sterilization of the whole system. The pipeline 1 connected with several sets of shunt modules 20 and provided with the additional heating device 21 and the additional temperature detecting sensor 22 can solve this problem. The water after temperature reduction is heated, so as to ensure that the water has a high enough temperature to sterilize the whole system.

Claims

1. A hemodialysis water treatment double cycle disinfection system, comprising a pretreatment system, a balance water tank, a first reverse osmosis membrane filtration mechanism with a first constant pressure pump, a second reverse osmosis membrane filtration mechanism with a second constant pressure pump, which are sequentially connected together through a pipeline, a discharge port with a discharge valve is arranged on the balance water tank, and a disinfection system is arranged, characterized in that, The disinfection system comprises a disinfectant disinfection system, a high-temperature disinfection system, the disinfectant disinfection system comprises a disinfectant feeding device, a pretreatment system, a balance water tank, a first constant pressure pump, a first reverse osmosis membrane filtering mechanism, a second reverse osmosis membrane filtering mechanism, a backflow pipeline, a first additional heating device, a first additional temperature detection sensor, a second additional heating device and a second additional temperature detection sensor, wherein the balance water tank is provided with a valve, the feeding port of the disinfectant feeding device is connected to a pipeline between the first constant pressure pump and the balance water tank, the water inlet end of the first reverse osmosis membrane filtering mechanism and the water outlet end of the second reverse osmosis membrane filtering mechanism are respectively provided with water inlet valves and water outlet valves, a bypass pipeline with a valve is connected to the front of the water inlet valve of the water inlet end of the first reverse osmosis membrane filtering mechanism and the rear of the water outlet valve of the water outlet end of the second reverse osmosis membrane filtering mechanism, the water outlet valve of the water outlet end of the second reverse osmosis membrane filtering mechanism is connected to the backflow pipeline between the balance water tank, the first constant pressure pump is provided with a low-pressure water pump, the low-pressure water pump is connected in series between the balance water tank and the first constant pressure pump, the water outlet of the low-pressure water pump is connected to the water inlet of the second constant pressure pump through a first stop valve, the wastewater outlet of the first reverse osmosis membrane filtering mechanism is connected to the backflow pipeline through a second stop valve, the wastewater outlet of the second reverse osmosis membrane filtering mechanism is connected to the backflow pipeline through a third stop valve, the backflow pipeline is provided with a residual chlorine detection sensor for detecting the residual chlorine of water and a temperature detection sensor for detecting the water temperature.

2. The hemodialysis water treatment dual cycle disinfection system of claim 1, wherein, A plurality of shunt modules are connected in shunt along a pipeline connected to the water outlet of the second reverse osmosis membrane filtering mechanism, the shunt modules supply ultrapure water to a hemodialysis device, the pipeline connected in shunt with the plurality of shunt modules is provided with a first additional heating device and a first additional temperature detection sensor, and a control device controls the first additional heating device to work according to the temperature detection signal of the first additional temperature detection sensor, so as to ensure that the temperature of the water in the pipeline connected in shunt with the plurality of shunt modules is maintained at a hot disinfection temperature level.

3. The dual cycle disinfection system for hemodialysis water treatment according to claim 2, characterized in that, The backflow pipeline backflows to the balance water tank and is provided with a second additional heating device and a second additional temperature detection sensor, and the control device controls the second additional heating device to work according to the temperature detection signal of the second additional temperature detection sensor, so as to ensure that the temperature of the water backflowing to the balance water tank through the backflow pipeline is maintained at a hot disinfection temperature level.

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