RU2331055C2 - System for automated selection, preparing and delivery of filtrate sample - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention refers to mining, concentrating, metallurgical and chemical fields of industry and can be used for measurement of physical or other characteristics. The system of automated selection, delivery and preparation of filtrate samples contains a filter, installed in a pressure tight sample selecting reservoir, connected with a storage reservoir via a sample receiving pipe and a direct valve. The direct valve is made as an uncontrolled ball or leaf-type valve. The storage reservoir is equipped with the first level detector. The system is equipped with a controlled source of vacuum pressure, which contains the first electro magnetic valve included into a pipeline of compressed air and an ejector direct channel, and it also contains the second electromagnetic valve and a selection valve. The system has transport pipes, a sample receiving reservoir, a control unit, a pressure tight sample selecting reservoir and an analyser. A receiving dispatching station is included into the system; the said station is designed as a pressure tight reservoir, equipped in its lower portion with a two way diaphragm valve, and at its upper portion it is equipped with a float gate valve located in its cylinder portion. The sample receiving station is equipped with a nipple, supplying water used for flushing out the line of sample delivery. A filtration unit between the sample selector and the receiving dispatching station is included into the system. The filtration unit consists of a pressure tight overflow reservoir with a filter element installed therein, of a controlled diaphragm bottom valve, of an overflow nipple, of a diaphragm dump valve and of the filtrate storage reservoir for following regeneration of the filter element. The filter element is pressure tight connected with the filtrate storage reservoir for following regeneration of the filter element. The controlled diaphragm bottom valve is connected to the lower part of the overflow reservoir. The upper part is designed with an overflow nipple connected with the diaphragm dump valve.

EFFECT: facilitates reliability of a sample selection and its credibility.

3 cl, 1 dwg

Description

The invention relates to the mining, processing, metallurgical and chemical industries and is used as an automatic means of sampling, preparing and delivering samples of filtrates, for example, for measuring any physical or other parameters.

A technical solution is known according to patent RU No. 224281 dated 2003.02.11, G01N 1/10, “A filtrate sampling and delivery system for ionometry”, containing a filter immersed in the test medium and connected to a storage tank, a vacuum pressure source that is supplied through a pneumatic tube connected to the top opening of the storage tank. The system contains a sampling tank associated with the storage tank, and a control device, the first output of which is connected to a vacuum pressure source. The storage tank is divided into a washing chamber and a sending chamber. The lower opening of the washing chamber is the lower opening of the storage tank, and the side opening of the sending chamber is the side opening of the storage tank. A floating valve is installed inside the flushing chamber with the possibility of overlapping the lower and upper holes. The filter is connected through a sampling tube to the bottom opening of the storage tank. The side opening of the storage tank through the transport tube is connected to a sampling tank, which is connected to the measuring input of the analyzer. A flow sensor and a check valve are installed in the transport tube. The output of the flow sensor is connected to the input of the control device, the second output of which is connected to the control input of the analyzer.

The advantage is the automation of the process of sampling, delivery and preparation for measurement of samples of filtrates to determine their ionic composition and increase the service life of the filter.

However, the system does not allow to achieve a predetermined dosage ratio of filtrate volumes for measuring and regenerating the filter, which reduces the reliability of the analysis and the operational characteristics of the system as a whole.

The solution is known according to patent RU No. 26654, dated 06.06.2002, G01N 1/10, U1, “Automated system for the selection and delivery of samples of the filtrate”, containing a filter connected through a sampling tube and a direct valve with a storage tank equipped with a level sensor, a controlled source a vacuum pressure containing the first solenoid valve included in the compressed air line, the direct channel of the ejector and the second electromagnetic valve, the side channel of the ejector is connected through a pneumatic pipe to the storage tank, the output of which is through the check valve, and t the passport tube is connected to the sampling tank, 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, the filter is installed in a sealed sampling tank, which is connected to a sampling tube immersed in an open technological tank with the liquid under study medium, a sealed sampling tank is connected through a third electromagnetic valve to the hot water line, the second electromagnetic the pan is switched on at the inlet of the compressed air line, 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 analyzer input, the output of the sample tank through the tube is connected to the analyzer, flushing the water supply pipe is installed tangentially in a sealed sampling container, the direct valve is made in the form of an uncontrolled valve, for example a ball th or the tab, the check valve is in the form of uncontrolled valve, e.g. ball or daisy.

The advantage is the automation of the process of selection and delivery of filtrate samples to a measuring device.

However, the use of uncontrolled valves reduces the reliability of the system as a whole, the use of hot water for filter regeneration in many technological processes is unacceptable, and the use of uncontrolled valves leads to the ingress of part of the wash water into the accumulated sample of the filtrate, which can lead to a decrease in the reliability of the measurement.

The technical result of the proposed solution is to increase the reliability and reliability of the sampling and operation of the system as a whole due to the reliable provision of a metered ratio of filtrate volumes for measuring and regenerating the filter, obtaining additional functions of the system

The goal is achieved as follows.

The system of automatic sampling, delivery and sample preparation of filtrates contains a filter connected through a sampling tube and a direct valve, for example a ball or flap valve, with a storage tank equipped with a first level sensor, a controlled vacuum pressure source containing a first solenoid valve included in the compressed air line and direct channel of the ejector and the second solenoid valve, non-return valve, transport tubes, sampling tank, control device, sealed sampling tank, and alizator while

- a receiving station has been introduced,

- the receiving station is made in the form of a sealed container equipped in its lower part with a controllable two-way diaphragm valve, and in the upper part - with a float shut-off valve and a water supply nozzle located, for example, in its cylindrical part, used to flush the sample delivery line,

- a filtration unit has been introduced between the sampler and the receiving station,

- a filtration unit, consisting of:

a sealed overflow container with a filter element located therein, a controlled diaphragm bottom valve, an overflow fitting, a diaphragm relief valve and a filtrate storage tank for subsequent regeneration of the filter element,

- the filter element is hermetically connected to the storage capacity of the filtrate volume for subsequent regeneration of the filter element.

A controlled diaphragm bottom valve is attached to the bottom of the overflow tank, and the upper part is made with an overflow fitting connected to the diaphragm relief valve.

To increase the degree of purification of the filtrate sample, the filter element of the second filtration stage can be added to the filtrate accumulation tank used for the regeneration of the main filter element.

The control unit, indication and transmission of information is equipped with a programmable logic controller and a program for processing a digital signal, visualization of measurement results.

The drawing shows a diagram of an automatic system for the selection and delivery of samples of filtrates from pressure pipelines, where

1 - sampler on the pressure pipe;

2 - filtration unit with filter element 2-1;

3 - regeneration unit with filter element 3-1;

4 - receiving station with a float valve;

5 - pneumatic impulse line;

6 - sample receiving unit;

7 - valve controlled two-way diaphragm;

8 - ejector;

9 - diaphragm relief valve;

10 - diaphragm bottom valve;

11 - control unit;

12 - electrical control panel with electromagnetic valves K1 - K8.

The essence of the proposed solution is as follows.

The automatic system for the selection, preparation and delivery of samples of filtrates from pressure pipelines consists of a sampling device 1 installed on the pressure pipe and connected to the filtration unit 2 through a controlled diaphragm bottom valve 10 located in the lower part of the block 2 body, and located in its upper side a drain fitting connected to a controlled diaphragm relief valve 9. Inside the filtration unit 2, a filter element 2-1 is placed, hermetically connected to the regeneration unit 3, which is connected to receiving station 4 through a controlled two-way diaphragm valve 7. The receiving station 4 at the top of the sealed housing is equipped with a float shut-off valve 4-1 and a fitting for supplying water through the controlled valve K-1, used to flush the sample delivery line from the receiving station 4 to the air separator 6 .Washing water after filling the volume of the receiving station is transported under the pressure of compressed air supplied through the pneumatic pulse line 5. Filter selection and delivery This is carried out due to the vacuum - pressure created by the ejector 8 and transmitted via the pneumatic pulse line 5 to the receiving station 4. The system is controlled and the information is transmitted by the controller 11, which controls the electromagnetic valves K-1, ..., K-8 in accordance with the sequence diagram.

The automatic system for the selection and delivery of samples of filtrates from pressure pipelines is as follows.

According to the signal from the controller 11, the electromagnetic valves K-3, K-4, K-5, K-7, K-8 are turned on. In this case, the locking device of the sampler 1 is opened and the technological sample under pressure equal to the pressure in the process pipe enters through the diaphragm bottom valve 10 into the capacity of the filtration unit 2 and through the upper side fitting and the diaphragm relief valve 9 goes into the process pack during the entire sampling time and accumulation of filtrate. At the same time, the ejector 8 creates a vacuum, which is transmitted via the pneumatic pulse line 5 to the receiving station 4 and the filtering process is started. The filtrate from the process sample through the filter element 2-1 begins to fill the volume of the regeneration unit 3, and then through the controlled two-way diaphragm valve 7 it fills the volume of the receiving station 4 until the float shut-off valve 4-1 emerges and the vacuum supplied through line 5 is closed. determined in a practical way and it must exceed the time required to fill the filtrate with the indicated volumes. Then, according to the sequence diagram, at the command of the controller 11, the K-3, K-4, K-7, K-8 solenoid valves are turned off and the K-2 solenoid valve is turned on. In this case, the sampler 1 stops the flow of the sample, a controlled two-way diaphragm valve 7 opens the filtrate exit from the receiving station 4 through the sample delivery line to the sample receiving unit 6, while simultaneously closing the outlet to the regeneration unit 3. Compressed air through the ejector 8 transfers the filtrate from the block through line 5 4 to block 6. At the end of the delivery, according to the sequence diagram, the K-2 solenoid valve is turned off by the command from the controller 11 and the K-3, K-6 solenoid valves are turned on and the filtrate is squeezed out of the regenerated unit with compressed air walkie-talkie 3, thereby washing the filter element 2-1 countercurrently. The regenerate together with the remains of the process sample from the filter housing 2 through the diaphragm bottom valve 10 is discharged into the process pack, while the diaphragm waste valve 9 is closed. After the regeneration of the filter element 2-1 is completed, according to the sequence diagram, the sample delivery line is flushed by a command from the controller 11. Turn off the K-3, K-5, K-6 solenoid valves, turn on the K-2 solenoid valve, and then K-1 for one to three seconds and supply water. Then the K-1 solenoid valve is turned off, the K-5 valve is turned on, and the delivery line is flushed and purged.

To increase the purity of the filtrate, as well as in cases of difficult-to-filter process media, it is possible to use an additional filter element 3-1 in the regeneration unit 3 as the second stage of filtration.

The proposed system is also applicable to perform the functions of sampling and delivery of filtrate samples from pressureless open flows and tanks. At the same time, appropriate changes are made to the cyclogram.

The industrial production of the proposed system is not difficult for its current level.

The claimed technical solution is made and tested at ZAO "Technolink", St. Petersburg, Russia.

Claims (3)

1. The system of automatic sampling, delivery and sample preparation of filtrates, containing a filter installed in a sealed sampling tank connected through a sampling tube and a direct valve made in the form of an uncontrolled, for example, ball or flap valve, with a storage tank equipped with a first level sensor, a controlled vacuum pressure source containing a first solenoid valve and a direct ejector channel included in the compressed air line, and a second solenoid valve, a check valve, assorted tubes, a sampling tank, a control device, a sealed sampling tank, an analyzer, characterized in that a receiving station is introduced, the receiving station is made in the form of a sealed container equipped with a controllable two-way diaphragm valve in its lower part, and a float shutoff valve in the upper part, and located, for example, in its cylindrical part, a water supply fitting in it, used to flush the sample delivery line, a filtration unit is introduced between the sampler and the by a dispatch station, a filtration unit, consisting of a sealed overflow tank with a filter element located in it, a controlled diaphragm bottom valve, an overflow nozzle, a diaphragm relief valve and a filtrate accumulation tank for subsequent regeneration of the filter element, the filter element is hermetically connected to the filtrate volume accumulation tank for subsequent regeneration, a controlled diaphragm bottom valve is attached to the bottom of the overflow tank, and the top Nene with overflow fitting connected to a diaphragm relief valve. 2. The system according to claim 1, characterized in that in order to increase the degree of purification of the filtrate sample, a filter element of the second filtration stage is introduced into the filtrate storage tank used for regeneration of the main filter element. 3. The system according to claims 1 and 2, characterized in that the control unit, indication and transmission of information is equipped with a programmable logic controller and a program for processing a digital signal, visualization of measurement results.