RU131713U1 - DEVICE FOR PURIFICATION OF WATER FOR MEDICAL PURPOSES BY THE REVERSE OSMOSIS METHOD - Google Patents

Abstract

A device for water purification for medical purposes, including a node with a reverse osmosis membrane, a storage tank, a tank with a chemical agent, a mode switch, the first, second, third and fourth highways, while the input of the node with a reverse osmosis membrane is connected to the first highway for supplying pre-prepared water, which contains in series the first solenoid valve and high-pressure pump, the first output of the node with the reverse osmosis membrane is connected to the highway a wasp of water, and the second output of the assembly with a reverse osmosis membrane is connected to the supply tank by a second line, in which the second solenoid valve is installed, the device also includes a third line, which connects the output of the storage and storage tank to the first line in front of the high pressure pump, a third solenoid valve is installed in the third line, and the output of the tank with a chemical agent is connected to the first line in front of the high pressure pump by the fourth line, while The th mode switch is made in the form of three ball valves with a common handle, the first ball valve installed in the first line, the second ball valve installed in the second line and the third ball valve installed in the fourth line.

Description

The utility model relates to membrane technology and can be used in the purification of liquids by the reverse osmosis method, mainly to obtain water for hemodialysis.

Purification of liquids by reverse osmosis is carried out using special semi-permeable membranes. At the same time, in the process of cleaning, the membrane productivity decreases, which is caused by several reasons, namely, concentration polarization, adsorption, gel layer formation and clogging of pores. A short membrane life leads to the need for frequent replacement of the membrane.

Another way to increase filtration performance is to restore the membrane by periodically cleaning it.

Closest to the claimed utility model is the water purification device described in JP 2000225324. In said patent, the restoration of the reverse osmosis membrane is carried out due to the fact that water, which is a mixture of previously prepared water and water that has been purified through the reverse osmosis, is supplied to the inlet of the membrane the membrane.

The disadvantage of the prototype is the deterioration of the reverse osmosis membrane as a result of the concentration of microorganisms, since, multiplying, microorganisms (microflora) block the surface of the membrane, impairing its performance, and can damage the separation layer, reducing selectivity.

The problem to which the claimed technical solution is directed is to create a safe installation when conducting water treatment for hemodialysis with an increased service life of the reverse osmosis membrane.

The technical result of this utility model is the safety of the installation when conducting water treatment for hemodialysis with an increase in the service life of the reverse osmosis membrane, as well as improving the quality of the water obtained by increasing the degree of purification by maintaining the initial physical characteristics of the membrane, such as selectivity and performance.

The technical result is achieved by the fact that the device for water purification for medical purposes includes a node with a reverse osmosis membrane and a reservoir, a container with a chemical agent, a valve mode switch, the first, second, third and fourth highways. In this case, the input of the unit with the reverse osmosis membrane is connected to the first line for supplying pre-prepared water, which contains the first solenoid valve and the high-pressure pump in series. The first output of the node with the reverse osmosis membrane is connected to the water discharge line. The second output of the node with a reverse osmosis membrane is connected to the drive by a second highway, in which a second electromagnetic valve is installed. The device also includes a third line, which connects the drive output to the first line in front of the high pressure pump. At the same time, a third solenoid valve is installed in the third line. The device contains a container with a chemical reagent. The output of the chemical tank is connected to the first line in front of the high pressure pump by the fourth line. The device is equipped with a valve mode switch made of three ball valves with a common handle, the first ball valve installed in the first line, the second ball valve installed in the second line and the third ball valve installed in the fourth line.

In the future, the utility model is illustrated by a detailed description of a specific example of execution and the drawing, which shows a diagram of the device.

The inventive device comprises a first line 1 for supplying pre-prepared water, in which a first solenoid valve 2, a first mechanical ball valve 3 and a high pressure pump 4 are installed in series. Also, in the first line 1, an ejection pump 21 is installed, the input of which is connected to the input of the first mechanical ball valve 3, and the output of the ejection pump 21 is connected to the output of the first mechanical ball valve 3. The first pre-prepared water supply line 1 is connected to the input of the reverse osmosis membrane unit 5 .

The first output of the reverse osmosis membrane unit 5 is connected to the waste water discharge line 7, and the second output of the reverse osmosis membrane unit 5 is connected to the second purified water outlet line 6.

The second purified water outlet highway 6 connects the first output of the reverse osmosis membrane assembly 5 to the treated water storage tank 8 and sequentially contains a purified water flow indicator 9, a second ball valve 10 and a second purified water electromagnetic valve 11.

The waste water discharge line 7 connects the first output of the reverse osmosis membrane unit 5 with a drainage clushe 12 and serves to discharge water washing the membrane. In the line 7 discharge of wastewater installed load choke 13.

The outlet of the treated water storage tank 8 is connected to the pump 15, after which the splitter 16 is installed. The splitter 16 allows to supply purified water to consumers or to supply purified water through the third line 14 to the first line 1 for supplying pre-prepared water. The junction of the third line 14 of the purified water supply and the first line 1 of the previously prepared water supply is located in front of the high pressure pump 4. At the same time, a third electromagnetic valve 17 is installed in the purified water supply line 14 in front of the junction with the first pre-prepared water supply line 1.

Also, the inventive device contains a container 18, which contains a chemical agent. The output of the tank 18 is connected to the first line 1 for supplying pre-prepared water to the fourth line 19 for supplying a chemical agent. The fourth chemical agent supply line 19 contains a third ball valve 20 and is connected to the first pre-prepared water supply line 1 through the ejection pump 21.

The first ball valve 3, the second ball valve 10 and the third ball valve 20 have a rigid connection with each other and are a single valve switch modes 22.

The inventive device operates as follows.

In the operating mode, pre-prepared, that is, clarified, dechlorinated, iron-free and softened water is supplied to the first supply line 1 of pre-prepared water, where it enters the inlet of the high-pressure pump 4. Pump 4 creates a pressure exceeding the osmotic pressure of the dissolved salts and is approximately 15 atm. up to 20 atm., and delivers water to node 5 on the reverse osmosis membrane. Part of the water flow, comprising from 15% to 30%, passes through the membrane, forming a stream of purified water. Purified water through the second outlet of the reverse osmosis membrane assembly 5 through the second purified water outlet 6 through the purified water flow indicator 9, the second mechanical ball valve 10 and the second solenoid valve 11 is supplied to the storage tank 8.

The other part (from 70% to 85%), through the first outlet of the reverse osmosis membrane unit 5, goes along the line 7 for discharging waste water into the drainage chamber 12.

To maintain stable operation of the device, periodic washing of the reverse osmosis membrane is carried out. To do this, with an interval, for example, 1 time in 30 minutes, close the first solenoid valve 2 in the first line 1 for supplying pre-prepared water and at the same time open the third solenoid valve 17 of the third line 14 for supplying purified water. At the same time, purified water from the supply-storage tank 8 is supplied to the inlet of the high-pressure pump 4. Purified water under a pressure of 15-20 atm. within, for example, 6 minutes is fed to the reverse osmosis membrane, which allows you to dissolve and wash away all formed deposits from it.

In the periodic washing mode, the part of the purified water that has passed through the membrane and is essentially already twice purified water is returned to the storage and storage tank 8, improving the quality of the purified water contained in it.

To increase the degree of water purification, the device provides a technological mode of chemical treatment, including disinfection, reverse osmosis membranes. The need to enable this mode occurs when the volume of purified water drops at the outlet of the reverse osmosis membrane unit 5. This volume is determined using the indicator 9 flow rate of purified water.

Switching from the operating mode to the technological mode of chemical treatment is carried out in manual mode using a mechanical valve switch 22 modes.

The mode switch 22 consists of three ball valves, namely a first ball valve 3, a second ball valve 10 and a third ball valve 20, which are mounted on a common base and equipped with a common handle. Moreover, the first valve 3 and the second valve 10 are installed in the same position and in an inverse position relative to the third valve 20.

In the operating mode of the device, the handle of the valve switch 22 modes is in the position when the first valve 3 and the second valve 10 are open, and the third valve 20 is closed.

To enable the technological mode of chemical treatment, the handle of the valve switch 22 modes are transferred to the position when the first valve 3 and the second valve 10 are closed and the third valve 20 is open. The chemical agent from the tank 18 along the fourth highway 19 through the open third mechanical ball valve 20 enters the ejection pump 21 and through the first highway 1 is fed into the node 5 of the reverse osmosis membrane. Chemical treatment of the reverse osmosis membrane occurs, while the second valve 10 is closed, which makes it possible to reliably eliminate the ingress of a chemical agent into the treated-storage tank 8 of purified water.

The proposed device for water purification for medical purposes by the reverse osmosis method allows you to ensure the safety of chemical flushing and prevent the possibility of unauthorized inclusion, as well as increase the life of the reverse osmosis membrane, improve the quality of the water that can be used in the medical industry to obtain water for hemodialysis .

Claims (1)

A device for water purification for medical purposes, including a node with a reverse osmosis membrane, a storage tank, a tank with a chemical agent, a mode switch, the first, second, third and fourth highways, while the input of the node with a reverse osmosis membrane is connected to the first highway for supplying pre-prepared water, which contains in series the first solenoid valve and high-pressure pump, the first output of the node with the reverse osmosis membrane is connected to the highway a wasp of water, and the second output of the assembly with a reverse osmosis membrane is connected to the supply tank by a second line, in which the second solenoid valve is installed, the device also includes a third line, which connects the output of the storage and storage tank to the first line in front of the high pressure pump, a third solenoid valve is installed in the third line, and the output of the tank with a chemical agent is connected to the first line in front of the high-pressure pump by the fourth line, while The th mode switch is made in the form of three ball valves with a common handle, the first ball valve installed in the first line, the second ball valve installed in the second line and the third ball valve installed in the fourth line.

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