Medical centralized water supply system capable of prolonging service life of reverse osmosis membrane

Abstract

A medical centralized water supply system capable of prolonging the service life of a reverse osmosis membrane relates to the technical field of water treatment systems and comprises a pretreatment system, a reverse osmosis system and a pure water tank, the pretreatment system sequentially comprises a first raw water tank and a second raw water tank which are connected in parallel, a first raw water pump and a second raw water pump which are connected in parallel, a first mechanical filter, a first activated carbon filter and a first water softener which are respectively provided with a multi-way valve, and a first precision filter; the reverse osmosis system sequentially comprises a first high-pressure pump and a first reverse osmosis membrane group. According to the utility model, the structure and water supply control logic of a water supply system are improved, the start-stop sequence of each valve in the system is adjusted through a PLC (Programmable Logic Controller) control program, and concentrated water accumulation is prevented to the greatest extent, so that the membrane surface is protected, the possibility of reverse osmosis scaling is reduced, the service life is prolonged, and the problem of membrane water production side backpressure can be prevented through real-time pressure monitoring and setting; the reverse osmosis membrane is protected, and the service life of the reverse osmosis membrane is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of medical water treatment systems, in particular to a medical central water supply system capable of extending the service life of a reverse osmosis membrane. Background Art

[0002] The existing medical central water supply equipment is composed of a pretreatment system, a reverse osmosis system, a post-treatment system, a pure water tank and a pure water delivery system. Among them, the water supply equipment uses tap water to be pressurized by the raw water pump, filtered by the pretreatment system and precision filter, and then enters the reverse osmosis water system to provide differentiated water supply. The working principle of the reverse osmosis membrane determines that after it is shut down, high-concentration concentrated water will inevitably accumulate on the front of the membrane, which may cause scaling on the membrane surface, thereby affecting the service life of the reverse osmosis membrane. At the same time, the back pressure on the water production side will also cause membrane damage. Utility Model Content

[0003] The purpose of the utility model is to solve the deficiencies of the above-mentioned prior art and provide a medical central water supply system that prolongs the service life of the reverse osmosis membrane, improves the water supply system structure and water supply control logic, adjusts the start and stop sequence of each valve in the system through the PLC control program, and prevents the accumulation of concentrated water to the greatest extent, thereby protecting the membrane surface, reducing the possibility of reverse osmosis scaling, and prolonging its service life. Through real-time pressure monitoring and setting, the problem of back pressure on the water production side of the membrane can also be prevented.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A medical central water supply system for extending the service life of a reverse osmosis membrane comprises a pretreatment system, a reverse osmosis system and a pure water tank.

[0006] The pretreatment system comprises in sequence a first raw water tank and a second raw water tank connected in parallel, a first raw water pump and a second raw water pump connected in parallel, a first mechanical filter with a multi-way valve, a first activated carbon filter and a first water softener, and a first precision filter. The water inlet main pipes of the first raw water tank and the second raw water tank are provided with a first normally open manual valve, the water inlet branch pipes are provided with a first raw water electric inlet valve and a second raw water electric inlet valve, a connecting pipeline with a second normally open manual valve is provided between the first raw water tank and the second raw water tank, and the water outlet branch pipes of the first raw water tank and the second raw water tank are provided with a first raw water valve. The first raw water tank is equipped with a normally open manual water outlet valve and a normally open manual water outlet valve of the second raw water tank. The first raw water pump and the second raw water pump are respectively provided with a normally open manual water inlet valve and a normally open manual water inlet valve of the first raw water pump on the water inlet branch pipes. The first raw water pump check valve and the second raw water pump check valve are respectively provided on the water outlet branch pipes. The first raw water pump is provided with a normally open manual water outlet valve on the outlet main pipe. The first precision filter is provided with a normally open water inlet valve on the water inlet pipe. The first pre-treated water product conductivity meter is provided on the water outlet pipe. The reverse osmosis system is connected to the first raw water tank through a pipeline with a first electric circulation valve. The connecting pipeline between the first raw water tank and the second raw water tank ensures that the liquid level between the water tanks is level to avoid single draining or overflowing, and also avoids frequent startup of a single electric water inlet valve. The multi-way valve controls the normal operation, forward washing and backwashing of each pre-treatment filter by switching the water flow direction.

[0007] Municipal tap water enters the first raw water tank and the second raw water tank through the first normally open manual valve, the first raw water electric inlet valve and the second raw water electric inlet valve. The outflow water flows through the first raw water tank normally open manual outlet valve and the second raw water tank normally open manual outlet valve, the first raw water pump normally open manual inlet valve and the second raw water pump normally open manual inlet valve, and flows into each pre-treatment filter from the first raw water pump and the second raw water pump. The raw water flows through the first mechanical filter, the first activated carbon filter and the first water softener in sequence through the multi-way valve, and then flows to the first precision filter through the first precision filter normally open inlet valve. The PLC reads the data of the first pre-treatment water conductivity meter. If it meets the standard, it will supply water to the reverse osmosis system. Otherwise, the first electric circulation valve will be opened to return water to the first raw water tank.

[0008] The reverse osmosis system comprises a first high-pressure pump and a first reverse osmosis membrane group in sequence, a first pre-treated water production often-open water inlet valve is arranged on the water inlet pipe of the first high-pressure pump, a first reverse osmosis membrane group electric water inlet valve is arranged on the water inlet pipe of the first reverse osmosis membrane group, a first check valve is arranged on the RO fresh water outlet pipe of the first reverse osmosis membrane group and is connected to a pure water tank, a pipeline with a first RO unqualified water electric discharge valve is arranged on the RO fresh water outlet pipe in front of the first check valve and is connected to a second raw water tank, a first concentrated water electric discharge valve is arranged on the RO concentrated water outlet pipe of the first reverse osmosis membrane group, and a pipeline with a first reflux valve is arranged on the RO concentrated water outlet pipe in front of the first concentrated water electric discharge valve and is connected to the water inlet pipe of the first reverse osmosis membrane group.

[0009] The number of the pure water tanks is one or multiple in parallel, the water inlet pipe of the pure water tank is provided with an electric water inlet valve and is connected to the RO fresh water outlet pipe of the first reverse osmosis membrane group, the outlet pipe 1 is connected to the water inlet pipe of the first high-pressure pump through a pipeline with a pure water electric flushing valve, and the outlet pipe 2 is connected to the post-processing water supply system through a pipeline. When there are multiple pure water tanks, the outlet pipes 1 of each pure water tank are connected.

[0010] The pre-treated water is often opened through the first pre-treated water inlet valve, the first high-pressure pump is pressurized, and enters the first reverse osmosis membrane group through the first reverse osmosis membrane group electric inlet valve. The reverse osmosis water enters the pure water tank through the corresponding pure water tank electric inlet valve, and is supplied from the pure water tank to the terminal water point by the post-treatment water supply system, and then returned to the pure water tank by the circulation pipeline. Part of the reverse osmosis concentrated water flows back to the front of the first high-pressure pump through the first reflux valve with adjusted opening, and part is discharged through the discharge pipe with adjusted opening of the valve. Among them, the first concentrated water electric discharge valve and the first RO unqualified water electric discharge valve are started and stopped by the corresponding control program.

[0011] The control logic of the reverse osmosis membrane service life extension control method includes:

[0012] S1, pretreatment procedure: start the first raw water pump and the second raw water pump → PLC reads the value of the first pretreatment product water conductivity meter. If it meets the RO water inlet requirements, start the startup procedure. Otherwise, open the first electric circulation valve. If it fails to meet the requirements for more than 5 minutes, start the alarm mode, close the valve and stop the pump;

[0013] S2, pre-startup procedure: open the first reverse osmosis membrane group electric water inlet valve → open the first RO unqualified water electric discharge valve, open the first concentrated water electric discharge valve → close the first electric circulation valve;

[0014] S3, normal water production procedure: after the pre-startup procedure runs for 20 seconds, close the first concentrated water electric discharge valve → after 30 seconds, start the first high-pressure pump → open the electric water inlet valve on the pure water tank inlet pipe → close the first RO unqualified water electric discharge valve;

[0015] S4, flushing procedure: open the first concentrated water electric discharge valve, open the first RO unqualified water electric discharge valve → open the pure water electric flushing valve → close the first raw water pump and the second raw water pump → close the electric water inlet valve on the pure water tank inlet pipe. The pure water in the pure water tank passes through the opened pure water electric flushing valve, the high-pressure pump, the reverse osmosis membrane group, and then is discharged from the concentrated water electric discharge valve and the RO unqualified water electric discharge valve.

[0016] S5. Shutdown procedure: After the flushing procedure runs for 30 seconds, turn off the first high-pressure pump → close the first concentrated water electric drain valve → close the first RO unqualified water electric drain valve → close the pure water electric flushing valve.

[0017] Preferably, the medical central water supply system also includes a cleaning and disinfection system, the water inlet pipe of the first reverse osmosis membrane group is connected to the cleaning and disinfection system through a pipeline with a first normally closed cleaning inlet valve, the RO fresh water outlet pipe on the front side of the first check valve is connected to the cleaning and disinfection system through a pipeline with a first normally closed cleaning fresh water outlet valve, and the RO concentrated water outlet pipe on the front side of the first concentrated water electric discharge valve is connected to the cleaning and disinfection system through a pipeline with a first normally closed cleaning concentrated water outlet valve.

[0018] The control logic of the reverse osmosis membrane service life extension control method includes:

[0019] Cleaning and disinfection procedure: When the first reverse osmosis membrane group needs to be cleaned and disinfected, open the first normally closed cleaning fresh water outlet valve, the first normally closed cleaning concentrated water outlet valve and the first normally closed cleaning inlet valve, and the disinfectant flows into the first reverse osmosis membrane group through the first normally closed cleaning inlet valve, and then returns to the cleaning and disinfection system through the first normally closed cleaning fresh water outlet valve and the first normally closed cleaning concentrated water outlet valve. After this cycle, discharge the disinfectant and flush the first reverse osmosis membrane group with pure water through the flushing procedure to ensure the normal operation of the membrane group.

[0020] Preferably, the multi-way valve of the first water softener is connected to the first salt box via a pipeline.

[0021] Preferably, the water inlet main pipes of the first raw water tank and the second raw water tank are provided with pipeline filters, raw water conductivity measuring instruments and raw water flow meters to monitor the quality of the incoming water. The pipeline filters not only play a preliminary filtering role, but also protect the rear-end instruments.

[0022] Preferably, the first raw water pump and the second raw water pump are variable frequency water pumps, and the number of opening can be adjusted according to the change of water volume. Dual variable frequency constant pressure water supply is adopted. When the terminal water consumption increases, the frequency is increased to increase the speed of the water pump accordingly. When the terminal water consumption decreases, the frequency is reduced and the speed of the water pump is reduced accordingly, so as to achieve a constant water supply pressure in the circulation pipeline and a dynamic balance between water supply and water use. When the water supply exceeds the standard for a short time and is greater than that of one water supply pump, pump A switches to industrial frequency operation and pump B starts variable frequency operation. When the water volume returns to normal, pump B automatically stops and pump A switches to variable frequency operation. At the same time, the dual pump design also ensures that one pump is still available after a single pump fails.

[0023] Preferably, the first mechanical filter, the first activated carbon filter and the first water softener are provided with pressure gauges and sampling ports before and after the pipes. The degree of dirtiness and blockage can be determined by comparing the pressure difference before and after, and the sampling port can be used to detect the water quality.

[0024] As a preference, each water tank is equipped with a liquid level transmitter PT to read the tank liquid level in real time to ensure the normal operation of the control program.

[0025] Preferably, an automatic air release valve is arranged behind the first mechanical filter, the first activated carbon filter and the first water softener, which can discharge the air in the pipeline to protect the components and the membrane system.

[0026] Preferably, the water inlet main pipes of the first raw water tank and the second raw water tank are connected to the water inlet pipes of the first raw water pump and the second raw water pump through a pipeline with a normally closed manual water inlet valve. When the automatic raw water inlet fails, the normally closed manual water inlet valve is opened to ensure the raw water supply.

[0027] Preferably, the pretreatment system and the reverse osmosis system include two sets of devices, the pretreatment system also includes a third raw water pump and a fourth raw water pump in parallel, a second mechanical filter with a multi-way valve respectively, a second activated carbon filter and a second water softener, and a second precision filter, and the reverse osmosis system also includes a second high-pressure pump and a second reverse osmosis membrane group.

[0028] Preferably, a first reverse osmosis water production pressure gauge and a sampling port are provided on the RO fresh water outlet pipe of the first reverse osmosis membrane group, and a second reverse osmosis water production pressure gauge and a sampling port are provided on the RO fresh water outlet pipe of the second reverse osmosis membrane group.

[0029] The control logic of the reverse osmosis membrane service life extension control method includes:

[0030] Double water production program: When a single set of equipment in the normal water production program cannot meet the water demand, the second set of equipment is started synchronously. The previous program is the same as the single set. When the two sets are running together, the PLC reads the pressure values ​​of the first reverse osmosis water production pressure gauge and the second reverse osmosis water production pressure gauge in real time. When the pressure on the water production side is higher than the set value, the high pressure protection is turned on, and the valve is closed in reverse order to stop the pump. The check valve protects the corresponding membrane group from being subjected to reverse pressure.

[0031] The advantages of the utility model are: improving the water supply system structure and water supply control logic, adjusting the start and stop sequence of each valve in the system through the PLC control program, preventing the accumulation of concentrated water to the greatest extent, thereby protecting the membrane surface, reducing the possibility of reverse osmosis scaling, and extending its service life; through real-time pressure monitoring and setting, it can also prevent the problem of back pressure on the water production side of the membrane, provide protection for the reverse osmosis membrane, and effectively extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the pretreatment system in the utility model (single set);

[0033] Figure 2 It is a schematic diagram of the reverse osmosis system in the utility model (single set);

[0034] Figure 3 It is a schematic diagram of the pretreatment system in the utility model (double set);

[0035] Figure 4 It is a schematic diagram of the reverse osmosis system in the utility model (double set);

[0036] Figure 5 Schematic diagram of the pure water tank in the utility model Figure 1 ;

[0037] Figure 6 Schematic diagram of the pure water tank in the utility model Figure 2 ;

[0038] Figure 7 Schematic diagram of the pure water tank in the utility model Figure 3 .

[0039] Description of the main component symbols in the figure:

[0040] Pretreatment system:

[0041] V101A, first raw water tank; V101B, second raw water tank; P101A, first raw water pump; P101B, second raw water pump; P101C, third raw water pump; P101D, fourth raw water pump; F101A, first mechanical filter; F101B, second mechanical filter; F102A, first activated carbon filter; F102B, second activated carbon filter; F103A, first water softener; F103B, second water softener; L101A, first precision filter; L101B, second precision filter; V102A, first salt box; V102B, second salt box; F104, pipeline filter;

[0042] CE101, raw water conductivity meter; CE102A, first pre-treated water conductivity meter; CE102B, second pre-treated water conductivity meter;

[0043] HV116, first normally open manual valve; HV101, second normally open manual valve; HV103A, first raw water tank normally open manual outlet valve; HV103B, second raw water tank normally open manual outlet valve; HV105A, first raw water pump normally open manual inlet valve; HV105B, second raw water pump normally open manual inlet valve; HV105C, third raw water pump normally open manual inlet valve; HV105D, fourth raw water pump normally open manual inlet valve; HV106 A, one-way valve of the first raw water pump; HV106B, one-way valve of the second raw water pump; HV106C, one-way valve of the third raw water pump; HV106D, one-way valve of the fourth raw water pump; HV115A, normally open manual water outlet valve of the first raw water pump; HV115B, normally open manual water outlet valve of the second raw water pump; HV120A, normally open water inlet valve of the first precision filter; HV120B, normally open water inlet valve of the second precision filter; HV104, normally closed manual water inlet valve;

[0044] FV101A, first raw water electric inlet valve; FV101B, second raw water electric inlet valve; FV102A, first electric circulation valve; FV102B, second electric circulation valve;

[0045] Reverse Osmosis System:

[0046] P201A, first high-pressure pump; P201B, second high-pressure pump; M201A, first reverse osmosis membrane group; M201B, second reverse osmosis membrane group;

[0047] HV203A, the first pre-treated water production often opens the water inlet valve; HV203B, the second pre-treated water production often opens the water inlet valve; HV217A, the first normally closed cleaning water inlet valve; HV217B, the second normally closed cleaning water inlet valve; HV206A, the first check valve; HV206B, the second check valve; HV208A, the first normally closed cleaning fresh water outlet valve; HV208B, the second normally closed cleaning fresh water outlet valve; HV209A, the first reflux valve; HV209B, the second reflux valve; HV215A, the first normally closed cleaning concentrated water outlet valve; HV215B, the second normally closed cleaning concentrated water outlet valve;

[0048] FV202A, electric water inlet valve for the first reverse osmosis membrane group; FV202B, electric water inlet valve for the second reverse osmosis membrane group; FV203A, electric discharge valve for the first RO unqualified water; FV203B, electric discharge valve for the second RO unqualified water; FV204A, electric discharge valve for the first concentrated water; FV204B, electric discharge valve for the second concentrated water; FV209, electric flushing valve for pure water;

[0049] PI203A, the first reverse osmosis water production pressure gauge; PI203B, the second reverse osmosis water production pressure gauge;

[0050] Pure water tank:

[0051] V501, the first pure water tank; FV501, the first pure water tank electric water inlet valve; HV512A, the first pure water tank normally open manual water outlet valve;

[0052] V601, second pure water tank; FV601, electric water inlet valve of second pure water tank; HV612A, normally open manual water outlet valve of second pure water tank;

[0053] V701, the third pure water tank; FV701, the third pure water tank electric water inlet valve; HV712A, the third pure water tank normally open manual water outlet valve. DETAILED DESCRIPTION

[0054] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with the accompanying drawings.

[0055] Embodiment 1: Figure 1-2 As shown, a medical central water supply system for extending the service life of a reverse osmosis membrane comprises a pretreatment system, a reverse osmosis system and a pure water tank.

[0056] Combination Figure 1 As shown, the pretreatment system includes in sequence a first raw water tank V101A and a second raw water tank V101B connected in parallel, a first raw water pump P101A and a second raw water pump P101B connected in parallel, a first mechanical filter F101A, a first activated carbon filter F102A and a first water softener F103A respectively with a multi-way valve, and a first precision filter L101A, a first normally open manual valve HV116 is arranged on the water inlet main pipe of the first raw water tank V101A and the second raw water tank V101B, a first raw water electric inlet valve FV101A and a second raw water electric inlet valve FV101B are respectively arranged on the water inlet branch pipe, a connecting pipeline with a second normally open manual valve HV101 is arranged between the first raw water tank V101A and the second raw water tank V101B, and a first normally open manual valve HV101 is arranged on the water outlet branch pipe of the first raw water tank V101A and the second raw water tank V101B respectively. A normally open manual water outlet valve HV103A of the first raw water tank and a normally open manual water outlet valve HV103B of the second raw water tank are provided, the water inlet branches of the first raw water pump P101A and the second raw water pump P101B are respectively provided with a first raw water pump normally open manual water inlet valve HV105A and a second raw water pump normally open manual water inlet valve HV105B, the water outlet branches are respectively provided with a first raw water pump one-way valve HV106A and a second raw water pump one-way valve HV106B, the water outlet main pipe is provided with a first raw water pump normally open manual water outlet valve HV115A, the water inlet pipe of the first precision filter L101A is provided with a first precision filter normally open water inlet valve HV120A, the water outlet pipe is provided with a first pre-treated water product conductivity meter CE102A, which is connected to the reverse osmosis system and connected to the first raw water tank V101A through a pipeline with a first electric circulation valve FV102A.

[0057] Combination Figure 2As shown, the reverse osmosis system includes a first high-pressure pump P201A and a first reverse osmosis membrane group M201A in sequence. The water inlet pipe of the first high-pressure pump P201A is provided with a first pre-treated water production often-open water inlet valve HV203A, the water inlet pipe of the first reverse osmosis membrane group M201A is provided with a first reverse osmosis membrane group electric water inlet valve FV202A, the RO fresh water outlet pipe of the first reverse osmosis membrane group M201A is provided with a first check valve HV206A and connected to a pure water tank, and the first check valve The RO fresh water outlet pipe on the front side of the return valve HV206A is provided with a pipeline with the first RO unqualified water electric discharge valve FV203A and is connected to the second raw water tank V101B, the RO concentrated water outlet pipe of the first reverse osmosis membrane group M201A is provided with the first concentrated water electric discharge valve FV204A, and the RO concentrated water outlet pipe on the front side of the first concentrated water electric discharge valve FV204A is provided with a pipeline with the first return valve HV209A and is connected to the water inlet pipe of the first reverse osmosis membrane group M201A.

[0058] Combination Figure 5-7 As shown, the number of pure water tanks is one or multiple in parallel, an electric water inlet valve is provided on the water inlet pipe of the pure water tank and is connected to the RO fresh water outlet pipe of the first reverse osmosis membrane group M201A, outlet pipe 1 is connected to the water inlet pipe of the first high-pressure pump P201A through a pipeline with a pure water electric flushing valve FV209, and outlet pipe 2 is connected to the post-treatment water supply system through a pipeline.

[0059] The water inlet main pipes of the first raw water tank V101A and the second raw water tank V101B are connected with the water inlet pipes of the first raw water pump P101A and the second raw water pump P101B through a pipeline with a normally closed manual water inlet valve HV104.

[0060] The control logic of the reverse osmosis membrane service life extension control method includes:

[0061] S1, pretreatment procedure: start the first raw water pump P101A and the second raw water pump P101B → PLC reads the value of the first pretreatment product water conductivity meter CE102A. If it meets the RO water inlet requirements, start the startup procedure. Otherwise, open the first electric circulation valve FV102A. If it fails to meet the requirements for more than 5 minutes, start the alarm mode, close the valve and stop the pump;

[0062] S2, pre-startup procedure: open the first reverse osmosis membrane group electric water inlet valve FV202A → open the first RO unqualified water electric discharge valve FV203A, open the first concentrated water electric discharge valve FV204A → close the first electric circulation valve FV102A;

[0063] S3, normal water production procedure: after the pre-startup procedure runs for 20 seconds, close the first concentrated water electric discharge valve FV204A → after 30 seconds, start the first high-pressure pump P201A → open the electric water inlet valve on the pure water tank inlet pipe → close the first RO unqualified water electric discharge valve FV203A;

[0064] S4, flushing procedure: open the first concentrated water electric discharge valve FV204A, open the first RO unqualified water electric discharge valve FV203A → open the pure water electric flushing valve FV209 → close the first raw water pump P101A and the second raw water pump P101B → close the electric water inlet valve on the pure water tank inlet pipe;

[0065] S5. Shutdown procedure: After the flushing procedure runs for 30 seconds, turn off the first high-pressure pump P201A → close the first concentrated water electric drain valve FV204A → close the first RO unqualified water electric drain valve FV203A → close the pure water electric flushing valve FV209.

[0066] Embodiment 2: Based on Embodiment 1, Figure 1-2 As shown, the medical central water supply system also includes a cleaning and disinfection system. The water inlet pipe of the first reverse osmosis membrane group M201A is connected to the cleaning and disinfection system through a pipeline with a first normally closed cleaning inlet valve HV217A, the RO fresh water outlet pipe on the front side of the first check valve HV206A is connected to the cleaning and disinfection system through a pipeline with a first normally closed cleaning fresh water outlet valve HV208A, and the RO concentrated water outlet pipe on the front side of the first concentrated water electric discharge valve FV204A is connected to the cleaning and disinfection system through a pipeline with a first normally closed cleaning concentrated water outlet valve HV215A.

[0067] The control logic of the reverse osmosis membrane service life extension control method includes:

[0068] Cleaning and disinfection procedure: When the first reverse osmosis membrane group M201A needs to be cleaned and disinfected, open the first normally closed cleaning fresh water outlet valve HV208A, the first normally closed cleaning concentrated water outlet valve HV215A and the first normally closed cleaning inlet valve HV217A, and the disinfectant flows into the first reverse osmosis membrane group M201A through the first normally closed cleaning inlet valve HV217A, and then returns to the cleaning and disinfection system through the first normally closed cleaning fresh water outlet valve HV208A and the first normally closed cleaning concentrated water outlet valve HV215A. After this cycle, the disinfectant is discharged and the first reverse osmosis membrane group M201A is flushed with pure water through the flushing procedure.

[0069] Embodiment 3: Based on Embodiment 1 or Embodiment 2, Figure 1As shown, the multi-way valve of the first water softener F103A is connected to the first salt tank V102A through a pipeline, the water inlet mains of the first raw water tank V101A and the second raw water tank V101B are provided with a pipeline filter F104 and a raw water conductivity meter CE101, pressure gauges and sampling ports are provided on the pipelines before and after the first mechanical filter F101A, the first activated carbon filter F102A and the first water softener F103A, and automatic air release valves are provided after the first mechanical filter F101A, the first activated carbon filter F102A and the first water softener F103A.

[0070] The first raw water pump P101A and the second raw water pump P101B are variable frequency water pumps.

[0071] Combination Figure 1-2 As shown, each water tank, filter and reverse osmosis membrane group is provided with a discharge pipe with at least one valve, and multiple pipelines before and after the reverse osmosis membrane group are provided with check valves.

[0072] Embodiment 4: The difference from Embodiment 1, Embodiment 2 or Embodiment 3 is that, in combination with Figure 3-4 As shown, the pretreatment system and the reverse osmosis system include two sets of devices. The pretreatment system also includes a third raw water pump P101C and a fourth raw water pump P101D in parallel, a second mechanical filter F101B with a multi-way valve, a second activated carbon filter F102B and a second water softener F103B, and a second precision filter L101B. The reverse osmosis system also includes a second high-pressure pump P201B and a second reverse osmosis membrane group M201B.

[0073] Correspondingly, the water inlet branches of the third raw water pump P101C and the fourth raw water pump P101D are respectively provided with the normally open manual water inlet valve HV105C of the third raw water pump and the normally open manual water inlet valve HV105D of the fourth raw water pump, the water outlet branches are respectively provided with the third raw water pump one-way valve HV106C and the fourth raw water pump one-way valve HV106D, the water outlet main pipe is provided with the normally open manual water outlet valve HV115B of the second raw water pump, the multi-way valve of the second water softener F103B is connected to the second salt tank V102B through a pipeline, the water inlet pipe of the second precision filter L101B is provided with the normally open water inlet valve HV120B of the second precision filter, the water outlet pipe is provided with the second pre-treated water conductivity meter CE102B, which is connected to the reverse osmosis system and connected to the first raw water tank V101A through a pipeline with a second electric circulation valve FV102B.

[0074] Correspondingly, a second pretreated water production inlet valve HV203B which is often opened is provided on the water inlet pipe of the second high-pressure pump P201B, a second reverse osmosis membrane group electric inlet valve FV202B is provided on the water inlet pipe of the second reverse osmosis membrane group M201B, a second check valve HV206B is provided on the RO fresh water outlet pipe of the second reverse osmosis membrane group M201B and is connected to the pure water tank, a pipeline with a second RO unqualified water electric discharge valve FV203B is provided on the RO fresh water outlet pipe on the front side of the second check valve HV206B and is connected to the second raw water tank V101B, a second concentrated water electric discharge valve FV204B is provided on the RO concentrated water outlet pipe of the second reverse osmosis membrane group M201B, and a pipeline with a second reflux valve HV209B is provided on the RO concentrated water outlet pipe on the front side of the second concentrated water electric discharge valve FV204B and is connected to the water inlet pipe of the second reverse osmosis membrane group M201B.

[0075] The water inlet pipe of the second reverse osmosis membrane group M201B is connected to the cleaning and disinfection system through a pipeline with a second normally closed cleaning inlet valve HV217B, the RO fresh water outlet pipe on the front side of the second check valve HV206B is connected to the cleaning and disinfection system through a pipeline with a second normally closed cleaning fresh water outlet valve HV208B, and the RO concentrated water outlet pipe on the front side of the second concentrated water electric discharge valve FV204B is connected to the cleaning and disinfection system through a pipeline with a second normally closed cleaning concentrated water outlet valve HV215B.

[0076] The RO fresh water outlet pipe of the first reverse osmosis membrane group M201A is provided with a first reverse osmosis water production pressure gauge PI203A and a sampling port, and the RO fresh water outlet pipe of the second reverse osmosis membrane group M201B is provided with a second reverse osmosis water production pressure gauge PI203B and a sampling port.

[0077] The control logic of the reverse osmosis membrane service life extension control method includes:

[0078] Double water production program: When a single set of equipment in the normal water production program cannot meet the water demand, the second set of equipment is started synchronously. The previous program is the same as the single set. When the two sets are running together, the PLC reads the pressure values ​​of the first reverse osmosis water production pressure gauge PI203A and the second reverse osmosis water production pressure gauge PI203B in real time. When the pressure on the water production side is higher than the set value, the high-pressure protection is turned on, and the valve is closed in reverse order to stop the pump.

[0079] Embodiment 5: Based on the above embodiment, Figure 5-7As shown, there are three pure water tanks, namely the first pure water tank V501, the second pure water tank V601 and the third pure water tank V701. The water inlet pipes are respectively provided with the first pure water tank electric inlet valve FV501, the second pure water tank electric inlet valve FV601 and the third pure water tank electric inlet valve FV701, and are connected to the RO fresh water outlet pipes of the first reverse osmosis membrane group M201A and the second reverse osmosis membrane group M201B. The water outlet pipes are respectively provided with the first electric inlet valve FV501, the second electric inlet valve FV601 and the third electric inlet valve FV701. The normally open manual water outlet valve HV512A of the first pure water tank, the normally open manual water outlet valve HV612A of the second pure water tank, and the normally open manual water outlet valve HV712A of the third pure water tank are interconnected and connected to the water inlet pipes of the first high-pressure pump P201A and the second high-pressure pump P201B through a pipeline with a pure water electric flushing valve FV209. The outlet pipe 2 is connected to the post-processing water supply system through a pipeline, and the water is supplied to the terminal water use point by the post-processing water supply system, and then returned to the pure water tank through the circulation pipeline.

[0080] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. The present invention can be used on similar products. Any changes or modifications made by any technician in the field of the present invention are covered by the patent scope of the present invention.

Claims

1. A medical central water supply system for extending the service life of a reverse osmosis membrane, characterized in that: Including pre-treatment system, reverse osmosis system and pure water tank; The pretreatment system comprises in sequence a first raw water tank (V101A) and a second raw water tank (V101B) connected in parallel, a first raw water pump (P101A) and a second raw water pump (P101B) connected in parallel, a first mechanical filter (F101A) with a multi-way valve, a first activated carbon filter (F102A) and a first water softener (F103A), and a first precision filter (L101A), a first raw water tank (V101A) and a second raw water tank ( A first normally open manual valve (HV116) is arranged on the water inlet main pipe of the first raw water tank (V101A) and the second raw water tank (V101B), a first raw water electric inlet valve (FV101A) and a second raw water electric inlet valve (FV101B) are arranged on the water inlet branch pipe, a connecting pipeline with a second normally open manual valve (HV101) is arranged between the first raw water tank (V101A) and the second raw water tank (V101B), and the outlet branch pipes of the first raw water tank (V101A) and the second raw water tank (V101B) are connected to the first raw water tank (V101A) and the second raw water tank (V101B). The first raw water tank is provided with a normally open manual water outlet valve (HV103A) and the second raw water tank is provided with a normally open manual water outlet valve (HV103B). The first raw water pump (P101A) and the second raw water pump (P101B) are provided with a normally open manual water inlet valve (HV105A) and the second raw water pump is provided with a normally open manual water inlet valve (HV105B). The outlet branch pipe is provided with a check valve (HV106A) and a check valve (HV107A) of the first raw water pump and a check valve (HV108B) of the second raw water pump. A pump check valve (HV106B), a first raw water pump normally open manual water outlet valve (HV115A) is provided on the water outlet main pipe, a first precision filter normally open water inlet valve (HV120A) is provided on the water inlet pipe of the first precision filter (L101A), a first pre-treated water product conductivity meter (CE102A) is provided on the water outlet pipe, connected to the reverse osmosis system and connected to the first raw water tank (V101A) through a pipeline with a first electric circulation valve (FV102A); The reverse osmosis system comprises a first high-pressure pump (P201A) and a first reverse osmosis membrane group (M201A) in sequence. A first pre-treated water production often-open water inlet valve (HV203A) is arranged on the water inlet pipe of the first high-pressure pump (P201A). A first reverse osmosis membrane group electric water inlet valve (FV202A) is arranged on the water inlet pipe of the first reverse osmosis membrane group (M201A). A first check valve (HV206A) is arranged on the RO fresh water outlet pipe of the first reverse osmosis membrane group (M201A) and connected to a pure water tank. The first check valve The RO fresh water outlet pipe on the front side of (HV206A) is provided with a pipeline with a first RO unqualified water electric discharge valve (FV203A) and is connected to the second raw water tank (V101B), the RO concentrated water outlet pipe of the first reverse osmosis membrane group (M201A) is provided with a first concentrated water electric discharge valve (FV204A), and the RO concentrated water outlet pipe on the front side of the first concentrated water electric discharge valve (FV204A) is provided with a pipeline with a first reflux valve (HV209A) and is connected to the water inlet pipe of the first reverse osmosis membrane group (M201A); The number of the pure water tanks is one or multiple in parallel. An electric water inlet valve is provided on the water inlet pipe of the pure water tank and is connected to the RO fresh water outlet pipe of the first reverse osmosis membrane group (M201A). The outlet pipe 1 is connected to the water inlet pipe of the first high-pressure pump (P201A) through a pipeline with a pure water electric flushing valve (FV209), and the outlet pipe 2 is connected to the post-processing water supply system through a pipeline.

2. A medical central water supply system for extending the service life of a reverse osmosis membrane according to claim 1, characterized in that: The medical central water supply system also includes a cleaning and disinfection system. The water inlet pipe of the first reverse osmosis membrane group (M201A) is connected to the cleaning and disinfection system through a pipeline with a first normally closed cleaning inlet valve (HV217A), the RO fresh water outlet pipe on the front side of the first check valve (HV206A) is connected to the cleaning and disinfection system through a pipeline with a first normally closed cleaning fresh water outlet valve (HV208A), and the RO concentrated water outlet pipe on the front side of the first concentrated water electric discharge valve (FV204A) is connected to the cleaning and disinfection system through a pipeline with a first normally closed cleaning concentrated water outlet valve (HV215A).

3. A medical central water supply system for extending the service life of a reverse osmosis membrane according to claim 2, characterized in that: The multi-way valve of the first water softener (F103A) is connected to the first salt tank (V102A) through a pipeline.

4. A medical central water supply system for extending the service life of a reverse osmosis membrane according to claim 1, characterized in that: A pipeline filter (F104) and a raw water conductivity meter (CE101) are provided on the water inlet main pipes of the first raw water tank (V101A) and the second raw water tank (V101B).

5. A medical central water supply system for extending the service life of a reverse osmosis membrane according to claim 1, characterized in that: The first raw water pump (P101A) and the second raw water pump (P101B) are variable frequency water pumps.

6. A medical central water supply system for extending the service life of a reverse osmosis membrane according to claim 1, characterized in that: Pressure gauges and sampling ports are provided on the front and rear pipelines of the first mechanical filter (F101A), the first activated carbon filter (F102A) and the first water softener (F103A).

7. A medical central water supply system for extending the service life of a reverse osmosis membrane according to claim 6, characterized in that: An automatic air release valve is arranged behind the first mechanical filter (F101A), the first activated carbon filter (F102A) and the first water softener (F103A).

8. A medical central water supply system for extending the service life of a reverse osmosis membrane according to claim 1, characterized in that: The water inlet main pipes of the first raw water tank (V101A) and the second raw water tank (V101B) are connected to the water inlet pipes of the first raw water pump (P101A) and the second raw water pump (P101B) through a pipeline with a normally closed manual water inlet valve (HV104).

9. A medical central water supply system for extending the service life of a reverse osmosis membrane according to any one of claims 1 to 8, characterized in that: The pretreatment system and the reverse osmosis system include two sets of devices. The pretreatment system also includes a third raw water pump (P101C) and a fourth raw water pump (P101D) connected in parallel, a second mechanical filter (F101B) with a multi-way valve, a second activated carbon filter (F102B) and a second water softener (F103B), and a second precision filter (L101B). The reverse osmosis system also includes a second high-pressure pump (P201B) and a second reverse osmosis membrane group (M201B).

10. A medical central water supply system for extending the service life of a reverse osmosis membrane according to claim 9, characterized in that: The RO fresh water outlet pipe of the first reverse osmosis membrane group (M201A) is provided with a first reverse osmosis water production pressure gauge (PI203A) and a sampling port, and the RO fresh water outlet pipe of the second reverse osmosis membrane group (M201B) is provided with a second reverse osmosis water production pressure gauge (PI203B) and a sampling port.

Images