Direct supply type dialysis water purification device

Abstract

The utility model provides a direct supply type dialysis water purification device, and particularly relates to the technical field of water treatment. The direct supply type dialysis water purification device comprises a raw water pump, a pretreatment system, a balancer, a first-stage pump, a first-stage reverse osmosis device and a pure water circulation pipeline which are sequentially communicated, wherein the pure water circulation pipeline flows back to the balancer; a water consumption point is arranged on the pure water circulation pipeline, a bypass of the pure water circulation pipeline is provided with a heat disinfection system, and the two ends of the heat disinfection system are connected to the pure water circulation pipeline at the two ends of the water consumption point respectively. According to the direct supply type dialysis water purification device, a middle water tank is omitted, pure water obtained after reverse osmosis treatment can be directly supplied to a water consumption point, retention and dead water are avoided, and the influence of storage on water quality is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a direct supply type dialysis pure water device. Background Art

[0002] At present, hemodialysis is a medical technology that ensures the life safety of kidney patients. Ultrapure water plays a vital role in the operation of hemodialysis, and the water quality directly affects the health of patients. Therefore, the water quality requirements for medical hemodialysis rooms are quite strict.

[0003] Conventional dialysis pure water mostly adopts a one-stage or two-stage reverse osmosis (RO) membrane design, usually with a raw water tank, a one-stage reverse osmosis water tank, a two-stage reverse osmosis pure water tank, etc. These tanks can play a buffering role, but at the same time, due to the long-term retention of water in the tank, the flow rate is low or it is in a stagnant water state, it will also lead to the breeding of organisms and excessive microorganisms, which does not meet the dialysis water standards. Utility Model Content

[0004] In view of the above shortcomings of the prior art, the utility model provides a direct supply type dialysis pure water device to improve the problem of biological growth and excessive microorganisms in dialysis pure water caused by water retention in the water tank.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a direct-supply type dialysis pure water device, which includes: a raw water pump, a pretreatment system, a balancer, a primary pump, a primary reverse osmosis device and a pure water circulation pipeline connected in sequence, and the pure water circulation pipeline flows back to the balancer; a water use point is provided on the pure water circulation pipeline, and a thermal disinfection system is provided in the bypass of the pure water circulation pipeline, and both ends of the thermal disinfection system are respectively connected to the pure water circulation pipeline at both ends of the water use point.

[0006] In one example of the utility model, the pretreatment system includes a mechanical filter, an activated carbon filter, a softening filter device and a precision filter connected in sequence through pipelines, the water inlet of the mechanical filter is connected to the water outlet of the raw water pump through a pipeline, and the water outlet of the precision filter is connected to the water inlet of the balancer through a pipeline.

[0007] In an example of the utility model, the softening and filtering device includes a first softening filter and a second softening filter arranged in parallel, the water inlet of the first softening filter is connected to the water outlet of the activated carbon filter, the water outlet of the first softening filter is connected to the water inlet of the precision filter, the second softening filter is connected in parallel at both ends of the first softening filter, and the outlet pipe of the first softening filter is provided with a branch connected to the second softening filter; the outlet pipe of the activated carbon filter and the branch are both provided with valves.

[0008] In an example of the present utility model, the primary reverse osmosis device includes a pure water outlet and a concentrated water outlet, the pure water outlet is connected to the pure water circulation pipeline, and the concentrated water outlet is connected to a concentrated water discharge pipe.

[0009] In an example of the present invention, a first conductivity detector is provided at the connection end between the pure water circulation pipeline and the balancer, and a second conductivity detector is provided on the concentrated water discharge pipe of the primary reverse osmosis device.

[0010] In an example of the utility model, a first branch and a second branch are connected to the concentrated water discharge pipe at the rear end of the second conductivity detector, the first branch is connected to the water inlet of the primary pump, a first valve is provided on the first branch, the second branch is connected to the drain tank, and a second valve is provided on the second branch.

[0011] In an example of the present invention, a third valve is provided on the concentrated water discharge pipe, and the second valve is arranged in parallel with the third valve.

[0012] In an example of the present utility model, a fourth valve is provided at the connection end between the pure water circulation pipeline and the primary reverse osmosis device, and a fifth valve is provided at the connection end between the pure water circulation pipeline and the balancer.

[0013] In one example of the utility model, the thermal disinfection system includes a circulation pump and a thermal disinfection water tank, one end of the circulation pump is connected to the pure water circulation pipeline at the rear end of the fourth valve through a first disinfection pipeline, and the other end is connected to the thermal disinfection water tank through a second disinfection pipeline. The hot disinfection water tank is connected to the pure water circulation pipeline at the front end of the fifth valve through a third disinfection pipeline. A sixth valve is provided on the first disinfection pipeline, and a seventh valve is provided on the third disinfection pipeline.

[0014] In an example of the utility model, the balancer is provided with a dosing port for dosing disinfectant, and the raw water pump is a variable frequency controlled pump.

[0015] The direct supply type dialysis pure water device of the utility model is provided with a balancer between the pretreatment system and the primary pump, so that the pretreated water enters the balancer, and the amount of water entering the primary reverse osmosis device is controlled by the balancer, and the primary reverse osmosis is used to directly supply water to prevent the water quality from being affected by storage. The surplus of pure water produced by the primary reverse osmosis after being supplied to the water point flows back to the balancer, so that water recycling can be realized. A thermal disinfection device is added to the bypass of the pure water circulation pipeline, and the main unit and pipeline parts of the equipment can be sterilized at high temperature by switching the valve. The disinfection cycle is short, there is no residue, and the safety of dialysis pure water can be guaranteed; the overall structure is simple and reasonable, occupies less space, is simpler to operate, and has strong practicality.

[0016] In addition, a dosing port is provided on the balancer, through which disinfectant can be added into the balancer, and the first-stage reverse osmosis and the delivery pipeline are chemically disinfected by circulation, without the need for additional disinfection equipment, thus saving costs and space.

[0017] Two parallel softening filters are set in the pretreatment system. The two can operate simultaneously or separately. When one of them fails, the other can be used as a backup without affecting the normal operation of the device. A conductivity detector is set at the outlet of the first-level reverse osmosis to detect the conductivity of the water in real time and control the switch of the valve according to the detection value, so as to control the water quality to meet the requirements and improve the utilization rate of water. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic structural diagram of a direct-supply dialysis pure water device in one embodiment of the utility model.

[0020] Component number description

[0021] 100, raw water pump; 200, pretreatment system; 210, mechanical filter; 220, activated carbon filter; 230, softening filter; 231, first softening filter; 232, second softening filter; 240, precision filter; 300, balancer; 310, dosing port; 400, primary pump; 500, primary reverse osmosis device; 510, concentrated water discharge pipe; 511, first branch; 512, second branch; 513, first valve; 514, second Valve; 515, the third valve; 600, the pure water circulation pipeline; 601, the control valve; 610, the fourth valve; 620, the fifth valve; 630, the first conductivity detector; 640, the second conductivity detector; 700, the thermal disinfection system; 710, the circulation pump; 720, the thermal disinfection water tank; 711, the first disinfection pipeline; 712, the second disinfection pipeline; 713, the third disinfection pipeline; 714, the sixth valve; 715, the seventh valve; 721, the eighth valve. DETAILED DESCRIPTION

[0022] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0024] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0025] The utility model provides a direct-supply type dialysis pure water device, by adding a balancer between a pretreatment system and a primary reverse osmosis device, using the balancer to control a primary pump at the front end of the primary reverse osmosis device, so that the primary reverse osmosis water is directly supplied to the water use point, preventing the problem of water storage affecting water quality.

[0026] See also Figure 1The direct supply type dialysis pure water device comprises: a raw water pump 100, a pretreatment system 200, a balancer 300, a primary pump 400, a primary reverse osmosis device 500 and a pure water circulation pipeline 600 which are sequentially connected along the water flow direction. Among them, the water inlet of the raw water pump 100 is connected to raw water through a pipeline, and the raw water is untreated water, such as tap water. The water outlet of the raw water pump 100 is connected to the water inlet of the pretreatment system 200 through a pipeline. The raw water pump 100 adopts a variable frequency control pump, and the variable frequency control pump can adjust the flow rate by adjusting the speed under constant pressure conditions. The water outlet of the pretreatment system 200 is connected to the water inlet of the balancer 300 through a pipeline, the water outlet of the balancer 300 is connected to the water inlet of the primary pump 400 through a pipeline, the water outlet of the primary pump 400 is connected to the water inlet of the primary reverse osmosis device 500 through a pipeline, the water outlet of the primary reverse osmosis device 500 is connected to the pure water circulation pipeline 600, and a water use point is provided on the pure water circulation pipeline 600. One or more water use points can be set. The present application does not impose any restrictions and can be set according to actual conditions. The pure water produced by the primary reverse osmosis device 500 flows to each water use point through the pure water circulation pipeline 600, and the surplus will flow back to the balancer 300 to complete the direct supply of pure water. There is no retention and dead water in the entire water production process, which prevents the problem of excessive microorganisms.

[0027] See also Figure 1 In one embodiment, the pretreatment system 200 includes a mechanical filter 210, an activated carbon filter 220, a softening filter device 230, and a precision filter 240 which are sequentially connected through pipelines. Specifically, the water outlet of the raw water pump 100 is connected to the water inlet of the mechanical filter 210 through a pipeline, the water outlet of the mechanical filter 210 is connected to the water inlet of the activated carbon filter 220 through a pipeline, the water outlet of the activated carbon filter 220 is connected to the water inlet of the softening filter device 230 through a pipeline, the water outlet of the softening filter device 230 is connected to the water inlet of the precision filter 240 through a pipeline, and the water outlet of the precision filter 240 is connected to the water inlet of the balancer 300 through a pipeline. The raw water is pressurized by the raw water pump 100 and enters the mechanical filter 210 to filter out mechanical impurities such as suspended matter in the raw water, and then enters the activated carbon filter 220 to adsorb harmful substances such as gases (such as chlorine), organic matter and bacteria in the water through the activated carbon, and then enters the softening filter device 230 to exchange the resin in the softener with the calcium and magnesium ions in the water to become softened water, and finally enters the precision filter 240 to filter out large particles of mechanical impurities to prevent large particles from entering the reverse osmosis membrane and causing blockage. The main function of the pretreatment system 200 is to preliminarily purify the raw water, and its specific composition can be set differently according to different water qualities.

[0028] See also Figure 1Further, the softening filter device 230 includes a first softening filter 231 and a second softening filter 232 arranged in parallel, that is, the water inlet of the first softening filter 231 is connected to the water outlet of the activated carbon filter 220 through a pipeline, and the water outlet of the first softening filter 231 is connected to the water inlet of the precision filter 240 through a pipeline; both ends of the second softening filter 232 are respectively connected to the pipelines at both ends of the first softening filter 231 through branches, and a branch flowing to the second softening filter 232 is provided on the outlet pipeline of the first softening filter 231. The first softening filter 231 and the second softening filter 232 can be operated simultaneously or separately, and the two are alternatives to each other to prevent the softening filter from failing and affecting the normal operation of the equipment. Furthermore, a valve is provided on the outlet pipe of the activated carbon filter 220 flowing to the first softening filter 231 or the second softening filter 232, and a valve is provided on the branch of the outlet pipe of the first softening filter 231 flowing to the second softening filter 232. The operation of the first softening filter 231 and / or the second softening filter 232 can be selected by controlling the switch of the valve.

[0029] See also Figure 1 The primary pump 400 is a high-pressure pump. The water flowing out of the balancer 300 is pressurized by the primary pump 400 and enters the primary reverse osmosis device 500 for reverse osmosis treatment. The reverse osmosis membrane inside the primary reverse osmosis device 500 can remove most of the ions and bacteria in the water and produce pure dialysis water that meets industry standards.

[0030] The primary reverse osmosis device 500 includes a pure water outlet and a concentrated water outlet. The pure water outlet is connected to a pure water circulation pipeline 600. The pure water produced by the primary reverse osmosis is supplied to each water-using point through the pure water circulation pipeline 600. The unused surplus pure water is refluxed to the balancer 300 through the pure water circulation pipeline 600 for recycling. The above-mentioned water-using point can be set to one or more. As an example, four water-using points are arranged in parallel on the pure water circulation pipeline 600, and each water-using point is provided with a control valve 601 for controlling the water use of the water-using point. Furthermore, a first conductivity detector 630 is provided at the connection end between the pure water circulation pipeline 600 and the balancer 300, which can monitor the water quality of the pure water in real time, and can issue an alarm in time when the pure water does not meet the standard.

[0031] The concentrate outlet is arranged at the bottom of the primary reverse osmosis device 500, and is connected to a concentrate discharge pipe 510, on which a second conductivity detector 640 is arranged. The concentrate discharge pipe 510 at the rear end of the second conductivity detector 640 is divided into two paths, one of which is connected to the inlet end of the primary pump 400, recorded as the first branch 511, and the other is connected to the lower water tank, recorded as the second branch 512. A first valve 513 is arranged on the first branch 511, and a second valve 514 is arranged on the second branch 512. A third valve 515 is arranged on the main pipeline of the concentrate discharge pipe 510, and the second valve 514 and the third valve 515 are arranged in parallel. The conductivity of the concentrated water produced by the reverse osmosis treatment of the primary reverse osmosis device 500 is detected in real time by the second conductivity detector 640. If the conductivity of the concentrated water is detected to be low (lower than the set value), the first valve 513 is opened, and the concentrated water is returned to the front end of the primary pump 400 through the first branch 511 for recycling; if the conductivity of the concentrated water is detected to be high (higher than the set value), the second valve 514 is opened to discharge it directly. The third valve 515 is fully opened to flush the suspended matter and concentrated water on the membrane surface at a high speed and large flow rate in a short time to avoid scaling.

[0032] See also Figure 1 In one embodiment, a dosing port 310 is provided on the top of the balancer 300, through which disinfectant can be put into the balancer 300, and through circulation, the delivery pipeline at the rear end of the balancer 300 and the primary reverse osmosis device 500 can be chemically disinfected. It should be noted that during disinfection, the control valve 601 of each water point needs to be opened for short-term discharge. After the disinfection is completed, rinsing is required. During rinsing, the control valve 601 of the water point also needs to be opened for a short time, and then closed after the test is qualified, and then put into operation.

[0033] See also Figure 1In one embodiment, the direct-supply dialysis pure water device is further provided with a thermal disinfection system 700, which is arranged on the bypass of the pure water circulation pipeline 600, and the two ends of the thermal disinfection system 700 are respectively connected to the pure water circulation pipeline 600 at the two ends of the water use point. Specifically, a fourth valve 610 is provided at the connection end of the pure water circulation pipeline 600 and the primary reverse osmosis device 500, and a fifth valve 620 is provided at the connection end of the pure water circulation pipeline 600 and the balancer 300. The thermal disinfection system 700 is arranged on the pure water circulation pipeline 600 between the fourth valve 610 and the fifth valve 620, and covers each water use point. The thermal disinfection system 700 includes a circulation pump 710 and a thermal disinfection water tank 720. One end of the circulation pump 710 is connected to the pure water circulation pipeline 600 at the rear end of the fourth valve 610 through the first disinfection pipeline 711, and the other end is connected to the thermal disinfection water tank 720 through the second disinfection pipeline 712. The thermal disinfection water tank 720 is connected to the pure water circulation pipeline 600 at the front end of the fifth valve 620 through the third disinfection pipeline 713. The first disinfection pipeline 711 is provided with a sixth valve 714, and the third disinfection pipeline 713 is provided with a seventh valve 715. The bottom of the thermal disinfection water tank 720 is provided with an eighth valve 721, and the water in the thermal disinfection water tank 720 can be quickly discharged through the eighth valve 721. The first disinfection pipeline 711 is provided with an electric heating device, and the specific structure of the electric heating device is not limited. For example, an outer-clad electric heating pipe can heat the water inside the pipeline through the electric heating device to achieve thermal disinfection.

[0034] Furthermore, the direct-supply dialysis pure water device also includes an electrical control system, for example, a PLC (Programmable Logic Controller), and the valves, conductivity detectors and electric heating devices of each pipeline are electrically connected to the PLC controller respectively, and various operations of the direct-supply dialysis pure water device can be automatically controlled by the PLC controller. It should be noted that the control process of the PLC can be executed using conventional programs in the art, which will not be described in detail here.

[0035] When thermal disinfection is adopted, thermal disinfection can be carried out by switching the valve, and the hot water can be discharged after the thermal disinfection is completed. Specifically, the equipment is shut down, the fourth valve 610 and the fifth valve 620 are manually closed, the sixth valve 714 and the seventh valve 715 are opened, the circulation pump 710 is started for circulation, and the heating monitoring temperature and the PLC calculation of the cumulative disinfection time are performed at the same time, and the data is automatically recorded. After the disinfection is completed, the heating is stopped, the circulation pump 710 is stopped, and the eighth valve 721 is opened with a delay; then the fourth valve 610 is opened, the raw water pump 100 and the primary reverse osmosis device 500 are started to operate, and the produced pure water enters the pure water circulation pipeline 600, and the hot pure water enters the hot disinfection water tank 720 through the seventh valve 715, and is discharged through the eighth valve 721. When the temperature of the pure water in the pipeline to be monitored reaches room temperature or is lower than 25-30 degrees, the sixth valve 714 and the seventh valve 715 can be closed, and the fifth valve 620 can be opened. After the water in the hot disinfection water tank 720 is drained, the eighth valve 721 is closed to complete the thermal disinfection.

[0036] The utility model direct supply type dialysis pure water device is provided with a balancer between the pretreatment system and the primary pump, so that the pretreated water enters the balancer, and the amount of water entering the primary reverse osmosis device is controlled by the balancer, and the primary reverse osmosis direct water supply method is adopted to prevent the water quality from being affected by storage. The surplus of pure water produced by the primary reverse osmosis after water supply at the water point flows back to the balancer, so that the recycling of water can be realized. A thermal disinfection device is added to the bypass of the pure water circulation pipeline, and the main unit and pipeline parts of the equipment can be sterilized at high temperature by switching the valve. The disinfection cycle is short, there is no residue, and the safety of dialysis pure water can be better guaranteed; the overall structure is simple and reasonable, the space occupied is smaller, the operation is simpler, and it has strong practicality. Therefore, the utility model effectively overcomes some practical problems in the prior art and has high utilization value and use significance.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A direct supply type dialysis pure water device, characterized in that: include: A raw water pump, a pretreatment system, a balancer, a primary pump, a primary reverse osmosis device and a pure water circulation pipeline connected in sequence, wherein the pure water circulation pipeline flows back to the balancer; The pure water circulation pipeline is provided with a water use point, a bypass of the pure water circulation pipeline is provided with a thermal disinfection system, and two ends of the thermal disinfection system are respectively connected to the pure water circulation pipeline at two ends of the water use point.

2. The direct supply type dialysis pure water device according to claim 1, characterized in that: The pretreatment system includes a mechanical filter, an activated carbon filter, a softening filter device and a precision filter which are connected in sequence through pipelines. The water inlet of the mechanical filter is connected to the water outlet of the raw water pump through a pipeline, and the water outlet of the precision filter is connected to the water inlet of the balancer through a pipeline.

3. The direct supply type dialysis pure water device according to claim 2, characterized in that: The softening and filtering device includes a first softening filter and a second softening filter arranged in parallel, the water inlet of the first softening filter is connected to the water outlet of the activated carbon filter, the water outlet of the first softening filter is connected to the water inlet of the precision filter, the second softening filter is connected in parallel to both ends of the first softening filter, and a branch connected to the second softening filter is provided on the water outlet pipe of the first softening filter; valves are provided on the water outlet pipe of the activated carbon filter and the branch.

4. The direct supply type dialysis pure water device according to claim 1, characterized in that: The primary reverse osmosis device comprises a pure water outlet and a concentrated water outlet, the pure water outlet is connected to the pure water circulation pipeline, and the concentrated water outlet is connected to a concentrated water discharge pipe.

5. The direct supply type dialysis pure water device according to claim 4, characterized in that: A first conductivity detector is provided at the connection end between the pure water circulation pipeline and the balancer, and a second conductivity detector is provided on the concentrated water discharge pipe of the primary reverse osmosis device.

6. The direct supply type dialysis pure water device according to claim 5, characterized in that: The concentrated water discharge pipe at the rear end of the second conductivity detector is connected to a first branch and a second branch, the first branch is connected to the water inlet of the primary pump, a first valve is provided on the first branch, the second branch is connected to the drain tank, and a second valve is provided on the second branch.

7. The direct supply type dialysis pure water device according to claim 6, characterized in that: The concentrated water discharge pipe is provided with a third valve, and the second valve is arranged in parallel with the third valve.

8. The direct supply type dialysis pure water device according to claim 1, characterized in that: A fourth valve is provided at the connection end between the pure water circulation pipeline and the primary reverse osmosis device, and a fifth valve is provided at the connection end between the pure water circulation pipeline and the balancer.

9. The direct supply type dialysis pure water device according to claim 8, characterized in that: The thermal disinfection system includes a circulation pump and a thermal disinfection water tank. One end of the circulation pump is connected to the pure water circulation pipeline at the rear end of the fourth valve through a first disinfection pipeline, and the other end is connected to the thermal disinfection water tank through a second disinfection pipeline. The thermal disinfection water tank is connected to the pure water circulation pipeline at the front end of the fifth valve through a third disinfection pipeline. A sixth valve is provided on the first disinfection pipeline, and a seventh valve is provided on the third disinfection pipeline.

10. The direct supply type dialysis pure water device according to claim 1, characterized in that: The balancer is provided with a dosing port for dosing disinfectant, and the raw water pump is a variable frequency controlled pump.

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