RU26654U1 - AUTOMATED FILTER SAMPLING AND DELIVERY SYSTEM - Google Patents

Description

The utility model relates to automatic means of sampling and delivery of filtrate samples from open containers for monitoring the material composition of industrial solutions, pulp liquid phase, wastewater and other process liquids of non-ferrous and ferrous metallurgy enterprises and can be used for similar purposes in the chemical and mining industries .

A device is known for sampling liquid samples from open containers 1. The device comprises a sampling tube, one end of which is immersed in an open container with a technological liquid being studied, and the other end is connected through a direct valve to the inlet of the filter. The inlet of the filter is additionally connected through a check valve to the drain pipe. The output of the filter through the distribution tube is connected to a vacuum pressure source and a measuring device.

Due to the creation in the distribution tube and, accordingly, in the sampling tube, the end of which is immersed in the technological liquid being studied, the liquid enters through a direct valve and a filter. Passing through the filter, the liquid is filtered and the filtrate through the distribution tube is sent to the measuring device.

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Due to the creation of pressure in the distribution pipe, the excess part of the filtrate (loop) is returned back to the liquid medium. In this case, the return occurs through a filter, a reverse clan and a drain pipe.

The advantage of this device lies in the fact that the filter is in close proximity to the measuring device and is not immersed in the studied process fluid. This allows, on the one hand, to quickly replace the filter, if necessary, and on the other, reduces the effect on the filter of aggressive and contaminated components of the studied liquid media, since it only comes into contact with them at the time of measurement. The returned excess part of the filtrate, flowing through the filter in the opposite direction, cleans the filter channels of the filter.

However, this} construction does not allow sampling from aggressive and contaminated liquid media, because, passing through the sampling tube and direct valve, contaminated samples settle on their internal surfaces. In order to prevent these deposits from affecting new sample samples, it is necessary to thoroughly rinse all process tubes after each measurement cycle.

An additional channel for returning excess sample filtrate through a non-return valve and a discharge pipe eliminates the ingress of particles accumulated on the filter into the sample pipe, but does not solve the problem of contamination of the sample channel.

Contamination of the sampling channel reduces the life of the device. In addition, these deposits introduce errors into subsequent measurements.

Known automatic sampling system 2, containing a filter immersed in the test liquid medium installed on the sampling line, a storage tank (pulsator) with a level sensor and two controlled pneumatic valves, one of which is installed in the sampling line, and the other in the sample delivery line , a controlled source of vacuum pressure connected to the control inputs of pneumatic valves and storage tanks and installed in the compressed air line, connected through an electromagnetic valve to the sampling line a receiving chamber with an electromagnetic valve at the outlet, a drain chamber with a level sensor and a software device connected by inputs to the level sensors, and outputs to the control inputs of the electromagnetic valves. The system is also equipped with a sample level sensor in the sampling tank, an additional solenoid valve installed at the outlet of the drain chamber, and a control valve, the control input of which is connected to the corresponding output of the software device, while the sampling and drain chambers are connected to the sample delivery line through normally closed and normally open channels of the control valve.

The disadvantage of the system is that the filter is constantly in an aggressive and contaminated environment. Aggressive components (such as chlorine) act on the filter elements and reduce its service life. An additional disadvantage is that the filter is regenerated by compressed air, which causes additional oxidation of aggressive and contaminated components of the medium, and leads to the formation of an insoluble precipitate. Sludge clogs the pores of the filter and also reduces its service life. In addition, insoluble precipitate reduces the accuracy of subsequent measurements.

The utility model is based on the task of increasing the overhaul period by increasing the filter service life by reducing the exposure time of aggressive and contaminated components of the investigated liquid medium.

The problem is solved in that the automated system for sampling and sample delivery, contains a filter connected through a sampling tube and a direct valve with a storage tank, equipped with a first level sensor. The controlled source of vacuum pressure contains the first solenoid valve and the direct channel of the ejector included in the compressed air line as well as the second solenoid valve. The lateral channel of the ejector through a pneumatic tube is connected to a storage tank, the output of which through a check valve and a transport tube is connected to a sampling tank. The control input of the first solenoid valve is connected to

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the first output of the control device, the output of the first level sensor is connected to the input of the control device. New in the system is that the filter is installed in a sampling tank, which is connected to a sampling tube immersed in an open technological tank with the studied liquid medium. Additionally, the sampling tank is connected through a third solenoid valve to the hot water line. The second electromagnetic valve of the source of vacuum pressure is turned on at the inlet of the compressed air line, and the control inputs of the second and third electromagnetic valves are connected respectively to the second and third control outputs of the control device. The sample receiving tank is equipped with a second level sensor, the output of which is connected to the input of the analyzer, the output of the sample receiving tank through a connecting tube is connected to the analyzer.

In addition, a flushing tube for supplying water is installed tangentially in a sealed container. Forward and non-return valves are made in the form of uncontrolled valves, for example, ball or flap.

In FIG. 1 shows a block diagram of the system.

In FIG. 2 gives a constructive implementation of the sampling tank.

In FIG. 3 shows a cross section of a sampling tank.

The system comprises a sealed sampling tank 1, inside which a filter 2 is installed. FIG. 1. In the sealed sampling tank 1, the lower, upper and lateral openings are made. An immersion sampling tube 3 is connected to the lower hole through the pipe, the end of which is immersed in the process medium 4. The lateral hole through the washing pipe 5 and the third solenoid valve 6 is connected to the hot water line. The storage tank 7 also has lower, upper and side openings. The lower opening of the storage tank 7 through the sampling tube 8 and the direct valve 9 is connected to the upper hole of the sealed sampling tank 1. The lateral opening of the storage tank 7 through the check valve 10 and the transport tube AND is connected to the sampling tank 12, the output of which is connected through the connecting pipe 13 to the analyzer 14.

The controlled source of vacuum pressure 15 contains an ejector 16, a direct channel of which is connected between the first and second electromagnetic valves 17 and 18, connected to the compressed air line. Moreover, the second electromagnetic valve 18 is connected to the input of the compressed air line. The lateral channel of the ejector 16 through the pneumatic tube 19 is connected to the upper hole of the storage tank 7.

MOoL yf-W The control inputs of the first, second and third solenoid valves 17, 18 and 6 are connected respectively to the first, second and third control outputs of the control device 20.

In the storage tank 7, a first level sensor 21 is installed, the output of which is connected to the control input of the control device 20. In the sampling tank 12, a second level sensor 22 is installed, the output of which is connected to the input of the analyzer 14.

The sampling tank 1 is made in the form of a cylindrical glass 23, at the bottom of which a funnel 24 is made with a nozzle on which a submersible sampling tube 3 is attached. FIG. 2. A flange 25 is mounted on top of the sampling container 7, to which the cover 26 is attached using bolts 27. A fitting 28 is made in the cover 26, on which the sample tube 8 is attached. The filter 2 is attached to the cover 26, which makes it easy to replace it. The filter 2 is installed in the cup 23 coaxially and between the inner surface of the wall of the cup 23 and the outer surface of the filter 2, a space 29 of FIG. 3. In the side hole made in the upper part of the glass 23 of the sampling tank 1, a washing tube 5 for supplying water is fixed. Moreover, the flushing tube 5 for supplying water is fixed tangentially tangentially to the body of the cylindrical glass 23.

The storage tank 7 is a cylindrical tank having an upper, lower and side openings. In the lower hole at the bottom 30 of the storage tank 7, a straight valve 9 is fixed

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at the output of which a fitting 31 is installed to which is connected

sample tube 8. In the side hole made in the lower part of the storage tank 7, a pipe 32 is fixed on which the check valve 10 is mounted. At the end of the check valve 10, a fitting 32 is made for installing the transport pipe 11. In the opening of the cover 33 using the fastening device 34 the pneumatic tube 19 is hermetically fixed. The first level sensor 21 is also mounted in the lid 33. The electrical contacts 35 of the first level sensor 21 are set to the required depth.

The system works as follows:

The characteristics of the system operation cycle, including sampling, sample transportation, measurement of sample parameters, and filter washing, are set by the control device 20. In the initial, initial state, all solenoid valves are closed. All tanks are under atmospheric pressure and empty. The control device 20 supplies voltage to the first and second solenoid valves 17 and 18. They open. Compressed air enters the ejector 16 and passing through the direct channel creates a vacuum in the side channel. This vacuum is transmitted to the pneumatic tube 19 and, accordingly, to the storage tank 7. The vacuum created in the storage tank 7 opens the direct valve 9 and closes the check valve 10. Next, the vacuum is transmitted to the sampling tube 8, filter 2, sampling tank 1 and sampling tube 3.

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The test liquid flows from an open tank 4 through a sampling tube 3 into a sampling tank 1, filling space 29 and then into the filter 2. Passing through the filter 2 it is filtered and the filtrate through the sampling tube 8 and the open valve 9 enters the storage tank 7. The level of filtrate in storage capacity 7 begins to increase. The level sensor 21 is located in the storage tank 7 at a height that provides a sufficient amount of filtrate, guaranteeing the representativeness of the sample. When the filtrate reaches the level specified by the electrical contacts 35, the signal from the level sensor 21 is fed to the input of the control device 20.

The control device 20 removes voltage at the control input of the first electromagnetic valve 17, it closes. Compressed air from the highway with a pressure of 2.0 atm. enters through the lateral channel of the ejector 16 and the pneumatic tube 19 into the storage tank 7. The direct valve 9 is closed by the created pressure and the non-return valve 10 opens. Pressure; m air, the filtrate is displaced from the storage tank 7 through the open valve 10 into the transport tube 11 and then into the sampling tank 12. The length of the transport tube 11 can be 100-150 meters. In the sample collection tank 12 installed in the express laboratory, the compressed air transporting the filtrate is separated from the liquid phase, and the sample fills the sample. capacity 12 and through the tube 13 enters the analyzer 14. Upon reaching the sample

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the level set by the second level sensor 22, a signal is output to the analyzer 14, which performs the necessary measurements. The measurement results are displayed on the indicator (not shown in the drawing). Then the sample is discharged into the drain.

Simultaneously with the arrival of a signal from the first level sensor 21 or with a time delay of 1 min. the control device 20 supplies voltage to the control input of the third electromagnetic valve 6, it opens. Hot water under pressure enters the sealed container 1 and rinses the outer surface of the filter 2, the inner surface of the walls of the sampling tank 1 and the immersion sampling tube 3 from the remnants of the investigated process fluid. Water is supplied to the sealed container 7 tangentially tangentially to the surface; therefore, it spirals downward in the space 29 between the outer surface of the filter 2 and the inner wall surface of the sealed container 1, cleaning them. The flushing time is 1 minute, set by the control device 20. Then, the control device 20 removes voltage from the control inputs of the second and third electromagnetic valves 18 and 6, they are closed. The general cycle, including sampling, its delivery to the analyzer, the necessary measurements and filter washing, is completed. The system returns to its initial state and is ready for the next cycle of work.

List of references.

1.U.S. Patent No. 6076410, Liquid sample collector and liquid return apparatus, published June 20, 2000.

2. The Author's Certificate of Russia, N 1265519, Automatic sampling system, published October 23, 1986.

Claims (4)

1. An automated filtrate sampling and delivery system, comprising a filter connected through a sampling tube and a direct valve with a storage tank equipped with a first level sensor, a controlled vacuum pressure source containing a first electromagnetic valve and a direct ejector channel and a second ejector channel included in the compressed air line the solenoid valve, the side channel of the ejector through a pneumatic tube is connected to a storage tank, the output of which through a check valve and a transport tube is connected to a sample receiver capacity, the control input of the first electromagnetic valve is connected to the first output of the control device, the output of the first level sensor is connected to the input of the control device, characterized in that the filter is installed in a sealed sampling tank, which is connected to a sampling tube immersed in an open technological tank with the studied liquid medium , a sealed sampling tank is connected through a third solenoid valve to the hot water line, a second solenoid valve is connected at the inlet m compressed air lines, control inputs of the second and third solenoid valves are connected respectively to the second and third control outputs of the control device, the receiving tank is equipped with a second level sensor, the output of which is connected to the analyzer input, the output of the receiving tank through the tube is connected to the analyzer.  2. The system according to claim 1, characterized in that the flushing tube for supplying water is installed tangentially in a sealed sampling tank.  3. The system according to claim 1, characterized in that the direct valve is made in the form of an uncontrolled valve, for example, ball or flap. 4. The system according to claim 1, characterized in that the check valve is made in the form of an uncontrolled valve, for example, ball or flap.