Multi-point automatic sampling system and sampling method

Abstract

The invention relates to a multi-point automatic sampling system and a sampling method, the system comprises a plurality of sampling pipes, the plurality of sampling pipes respectively extend to a plurality of sampling points, the outlet ends of the plurality of sampling pipes are connected with a main sampling pipe, and the plurality of sampling pipes are provided with inlet solenoid valves; the outlet end of the main sampling pipe is connected with a precise filtering unit, the precise filtering unit is connected with a main sample outlet pipe, the main sample outlet pipe is connected with the inlet ends of a plurality of sample outlet pipes, and the plurality of sample outlet pipes correspond to the plurality of sampling pipes; outlet electromagnetic valves are arranged on the plurality of sample outlet pipes, and sampling bottles are arranged at the outlet ends of the plurality of sample outlet pipes; and a main sampling pipe inlet electromagnetic valve is arranged between the precise filtering unit and the main sample outlet pipe. Automatic sampling of a plurality of sampling points can be achieved by controlling opening and closing of the electromagnetic valves, the sampling efficiency is improved, and the operation amount and the operation risk of analysis and testing personnel are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling, and in particular to a multi-point automatic sampling system and a sampling method. Background Art

[0002] In the existing carbon capture devices of thermal power plants, the absorbent sampling devices in the system have always relied on manual sampling. Sampling holes are reserved in various equipment and pipelines, and then connected to a unified sampling tank through sampling pipelines. Finally, the sample liquid is taken out from the sampling tank for testing.

[0003] However, after storing sample liquid for a long time, various impurities and sample liquid will be deposited on the wall of the sampling tank, which greatly affects the accuracy of the sampling test. In addition, the frequent sampling during the operation of the device also greatly increases the workload and operation risks of the laboratory personnel. Summary of the invention

[0004] The purpose of the present invention is to provide a multi-point automatic sampling system and a sampling method to realize automation in the sampling process, improve sampling efficiency, and reduce the workload and operation risks of laboratory personnel.

[0005] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides a multi-point automatic sampling system, which includes multiple sampling tubes, each of which extends to multiple sampling points, and the outlet ends of the multiple sampling tubes are connected to the main sampling tube, and the multiple sampling tubes are provided with an inlet solenoid valve; the outlet end of the main sampling tube is connected to a precision filtration unit, and the precision filtration unit is connected to a main sampling tube, and the main sampling tube is connected to the inlet ends of multiple sampling tubes, and the multiple sampling tubes correspond to the multiple sampling tubes; the multiple sampling tubes are provided with outlet solenoid valves, and the outlet ends of the multiple sampling tubes are provided with sampling bottles; a main sampling tube inlet solenoid valve is provided between the precision filtration unit and the main sampling tube.

[0006] Optionally, the main sample outlet pipe is also connected to a flushing water unit, and a flushing water inlet solenoid valve is provided between the main sample outlet pipe and the flushing water unit.

[0007] Optionally, the outlet end of the total sample outlet pipe is connected to a sewage pipe, and the sewage pipe is provided with a sampling and sewage discharge solenoid valve.

[0008] Optionally, the sewage pipe is connected to a waste liquid tank, the waste liquid tank is connected to a waste liquid storage unit, and a system sewage discharge solenoid valve is arranged between the waste liquid tank and the waste liquid storage unit.

[0009] Optionally, the system further comprises a PLC controller, which is respectively connected to the inlet solenoid valve, the outlet solenoid valve, the flushing water inlet solenoid valve, the sampling and sewage solenoid valve, and the system sewage solenoid valve.

[0010] The second aspect of the present invention provides a multi-point automatic sampling method, using the multi-point automatic sampling system provided by the first aspect of the present invention, the method comprising: Open the inlet solenoid valve on the sampling tube, the inlet solenoid valve of the main sampling tube, and the outlet solenoid valve on the sample outlet tube. The sampling tube starts to sample the sampling point and collects the sample into the sampling bottle through the sample outlet tube. After the sampling is completed, close the inlet solenoid valve, the inlet solenoid valve of the main sampling tube, and the outlet solenoid valve to complete the automatic sampling.

[0011] Optionally, the method also includes: before the sampling tube starts sampling the sampling point, opening the inlet solenoid valve on the sampling tube, the main sampling tube inlet solenoid valve, and the sampling and draining solenoid valve to drain the residual sample liquid in the sampling tube; after the drainage is completed, closing the main sampling tube inlet solenoid valve to complete the emptying of the residual sample liquid in the sampling tube.

[0012] Optionally, after the residual sample liquid in the sampling tube is emptied, the flushing water inlet solenoid valve is opened to flush the total sample outlet tube. After the flushing is completed, the flushing water inlet solenoid valve, the sampling and sewage solenoid valve, and the inlet solenoid valve are closed to complete the flushing of the total sample outlet tube.

[0013] Optionally, the method further comprises: after completing the automatic sampling, opening the system drain solenoid valve to discharge the liquid in the waste liquid tank to the waste liquid storage unit, and closing the system drain solenoid valve after the discharge is completed.

[0014] Optionally, the inlet solenoid valve, outlet solenoid valve, flushing water inlet solenoid valve, sampling sewage solenoid valve, and system sewage solenoid valve are respectively controlled to open and close through a PLC controller.

[0015] Through the above technical scheme, the multi-point automatic sampling system and sampling method of the present invention can realize automatic sampling of multiple sampling points by controlling the opening and closing of each solenoid valve. At the same time, by controlling the opening and closing sequence of different solenoid valves, the residual sample liquid before sampling can be emptied, the sample outlet tube can be flushed, and the system can be drained, so as to improve the automation level of the sampling process, improve the sampling efficiency, and reduce the operation workload and operation risks of analytical personnel.

[0016] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the multi-point automatic sampling system of the present invention.

[0018] Description of Reference Numerals 1-first sampling tube; 1-1-first sampling point; 1-2-first inlet solenoid valve; 2-second sampling tube; 2-1-second sampling point; 2-2-second inlet solenoid valve; 3-third sampling tube; 3-1-third sampling point; 3-2-third inlet solenoid valve; 4-fourth sampling tube; 4-1-fourth sampling point; 4-2-fourth inlet solenoid valve; 5-total sampling tube; 6-precision filtration unit; 7-total outlet tube; 8-first outlet tube; 8-1-first outlet solenoid valve; 8-2-first sampling bottle; 9-second Sample outlet tube; 9-1-second outlet solenoid valve; 9-2-second sampling bottle; 10-third sample outlet tube; 10-1-third outlet solenoid valve; 10-2-third sampling bottle; 11-fourth sample outlet tube; 11-1-fourth outlet solenoid valve; 11-2-fourth sampling bottle; 12-main sampling tube inlet solenoid valve; 13-rinsing water unit; 13-1-rinsing water inlet solenoid valve; 14-drain pipe; 14-1-sampling and drain solenoid valve; 15-waste liquid tank; 16-waste liquid storage unit; 16-1-system drain solenoid valve. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0020] The first aspect of the present invention provides a multi-point automatic sampling system, which includes multiple sampling tubes, which extend to multiple sampling points respectively, and the outlet ends of the multiple sampling tubes are connected to the main sampling tube, and the multiple sampling tubes are provided with inlet solenoid valves; the outlet end of the main sampling tube is connected to a precision filtration unit, and the precision filtration unit is connected to a main sampling tube, and the main sampling tube is connected to the inlet ends of multiple sampling tubes, and the multiple sampling tubes correspond to the multiple sampling tubes; the multiple sampling tubes are provided with outlet solenoid valves, and the outlet ends of the multiple sampling tubes are provided with sampling bottles; a main sampling tube inlet solenoid valve is provided between the precision filtration unit and the main sampling tube.

[0021] According to the present invention, optionally, the precision filtration unit can filter out particulate impurities with larger particle sizes that may exist in the sampled liquid taken by the total sampling tube in the sampling system, so that the sampled liquid is free of impurities to ensure the accuracy of sampling.

[0022] According to the present invention, optionally, the number of the plurality of sampling tubes, the plurality of sampling points, the plurality of sample outlet tubes and the sampling bottles can be set according to the required sampling device.

[0023] According to the present invention, optionally, the main sample outlet pipe is also connected to a flushing water unit, and a flushing water inlet electromagnetic valve is arranged between the main sample outlet pipe and the flushing water unit. The flushing water unit of the present invention can flush the main sample outlet pipe to avoid sample liquid contamination.

[0024] According to the present invention, optionally, the outlet end of the total sample outlet pipe is connected to a sewage pipe, and the sewage pipe is provided with a sampling sewage discharge electromagnetic valve. The sewage pipe of the present invention can empty the residual sample liquid to ensure the accuracy of sampling.

[0025] According to the present invention, optionally, the sewage pipe is connected to a waste liquid tank, the waste liquid tank is connected to a waste liquid storage unit, and a system sewage discharge solenoid valve is arranged between the waste liquid tank and the waste liquid storage unit.

[0026] According to the present invention, optionally, the system further comprises a PLC controller, and the PLC controller is respectively connected to the inlet solenoid valve, the outlet solenoid valve, the flushing water inlet solenoid valve, the sampling sewage solenoid valve, and the system sewage solenoid valve.

[0027] The PLC controller of the present invention can perform sampling monitoring. The entire sampling process is implemented by the PLC controller to perform sampling operations. An automated control method is used for remote control, which reduces the labor intensity of operators and improves the safety and accuracy of the sampling work.

[0028] The second aspect of the present invention provides a multi-point automatic sampling method, using the multi-point automatic sampling system provided by the first aspect of the present invention, the method comprising: Open the inlet solenoid valve on the sampling tube, the inlet solenoid valve of the main sampling tube, and the outlet solenoid valve on the sample outlet tube. The sampling tube starts to sample the sampling point and collects the sample into the sampling bottle through the sample outlet tube. After the sampling is completed, close the inlet solenoid valve, the inlet solenoid valve of the main sampling tube, and the outlet solenoid valve to complete the automatic sampling.

[0029] According to the present invention, optionally, the method also includes: before the sampling tube starts sampling the sampling point, opening the inlet solenoid valve on the sampling tube, the main sampling tube inlet solenoid valve, and the sampling sewage discharge solenoid valve to discharge the residual sample liquid in the sampling tube, and closing the main sampling tube inlet solenoid valve after the sewage discharge is completed to complete the emptying of the residual sample liquid in the sampling tube.

[0030] According to the present invention, optionally, after the residual sample liquid in the sampling tube is emptied, the flushing water inlet solenoid valve is opened to flush the total sample outlet tube. After the flushing is completed, the flushing water inlet solenoid valve, the sampling and sewage solenoid valve, and the inlet solenoid valve are closed to complete the flushing of the total sample outlet tube.

[0031] According to the present invention, optionally, the method further comprises: after completing the automatic sampling, opening the system drain solenoid valve to discharge the liquid in the waste liquid tank to the waste liquid storage unit, and closing the system drain solenoid valve after the discharge is completed.

[0032] According to the present invention, optionally, the inlet solenoid valve, the outlet solenoid valve, the flushing water inlet solenoid valve, the sampling and draining solenoid valve, and the system draining solenoid valve are respectively controlled to be opened and closed by a PLC controller.

[0033] The multi-point automatic sampling system and sampling method of the present invention can realize automatic sampling of multiple sampling points by controlling the opening and closing of each solenoid valve. At the same time, by controlling the opening and closing sequence of different solenoid valves, the residual sample liquid before sampling, the flushing of the sample outlet tube and the drainage of the system can be realized, so as to improve the automation level of the sampling process, improve the sampling efficiency, and reduce the operation workload and operation risks of analytical personnel.

[0034] The present invention is further illustrated by the following examples, but the present invention is not limited thereto.

[0035] Example 1 like Figure 1 As shown, a multi-point automatic sampling system of the present embodiment includes a first sampling tube 1, a second sampling tube 2, a third sampling tube 3, and a fourth sampling tube 4. The first sampling tube 1 extends to a first sampling point 1-1, the second sampling tube 2 extends to a second sampling point 2-1, the third sampling tube 3 extends to a third sampling point 3-1, and the fourth sampling tube 4 extends to a fourth sampling point 4-1. The outlet ends of the first sampling tube 1, the second sampling tube 2, the third sampling tube 3, and the fourth sampling tube 4 are all connected to a main sampling tube 5. A first inlet solenoid valve 1-2 is provided on the first sampling tube 1, a second inlet solenoid valve 2-2 is provided on the second sampling tube 2, a third inlet solenoid valve 3-2 is provided on the third sampling tube 3, and a fourth inlet solenoid valve 4-2 is provided on the fourth sampling tube 4. The outlet end of the total sampling tube 5 is connected to a precision filtration unit 6, and the precision filtration unit 6 is connected to a total sample outlet tube 7. The total sample outlet tube 7 is connected to the inlet ends of the first sample outlet tube 8, the second sample outlet tube 9, the third sample outlet tube 10, and the fourth sample outlet tube 11. The first sample outlet tube 8, the second sample outlet tube 9, the third sample outlet tube 10, and the fourth sample outlet tube 11 correspond to the first sampling tube 1, the second sampling tube 2, the third sampling tube 3, and the fourth sampling tube 4 respectively; the first sample outlet tube 8 is provided with a first outlet solenoid valve 8-1, and the second sample outlet tube 9 is provided with a second outlet solenoid valve 8-2. A magnetic valve 9-1, a third outlet electromagnetic valve 10-1 is provided on the third sample outlet tube 10, a fourth outlet electromagnetic valve 11-1 is provided on the fourth sample outlet tube 11, a first sampling bottle 8-2 is provided at the outlet end of the first sample outlet tube 8, a second sampling bottle 9-2 is provided at the outlet end of the second sample outlet tube 9, a third sampling bottle 10-2 is provided at the outlet end of the third sample outlet tube 10, and a fourth sampling bottle 11-2 is provided at the outlet end of the fourth sample outlet tube 11; a total sampling tube inlet electromagnetic valve 12 is provided between the precision filtration unit 6 and the total sample outlet tube 5; The main sample outlet pipe 7 is also connected to a flushing water unit 13, and a flushing water inlet solenoid valve 13-1 is provided between the main sample outlet pipe 7 and the flushing water unit 13; the outlet end of the main sample outlet pipe 7 is connected to a sewage pipe 14, and a sampling sewage discharge solenoid valve 14-1 is provided on the sewage pipe 14; the sewage pipe 14 is connected to a waste liquid tank 15, and the waste liquid tank 15 is connected to a waste liquid storage unit 16, and a system sewage discharge solenoid valve 16-1 is provided between the waste liquid tank 15 and the waste liquid storage unit 16; The system of this embodiment also includes a PLC controller, which is respectively connected to the first inlet solenoid valve 1-2, the second inlet solenoid valve 2-2, the third inlet solenoid valve 3-2, the fourth inlet solenoid valve 4-2, the first outlet solenoid valve 8-1, the second outlet solenoid valve 9-1, the third outlet solenoid valve 10-1, the fourth outlet solenoid valve 11-1, the flushing water inlet solenoid valve 13-1, the sampling and sewage solenoid valve 14-1, and the system sewage solenoid valve 16-1.

[0036] Example 2 A multi-point automatic sampling method in this embodiment is composed of multiple single-point sampling methods, and the single-point sampling methods include: Open the first inlet solenoid valve 1-2 on the first sampling tube 1, the main sampling tube inlet solenoid valve 12, and the sampling and sewage discharge solenoid valve 14-1 to discharge the residual sample liquid in the first sampling tube 1. After the sewage discharge is completed, close the main sampling tube inlet solenoid valve 12 to complete the discharge of the residual sample liquid in the first sampling tube 1; After emptying, open the flushing water inlet solenoid valve 13-1 to flush the total sample outlet pipe 7. After flushing, close the flushing water inlet solenoid valve 13-1, the sampling and sewage solenoid valve 14-1, and the first inlet solenoid valve 1-2 to complete the flushing of the total sample outlet pipe 7; Open the first inlet solenoid valve 1-2 on the first sampling tube 1, the main sampling tube inlet solenoid valve 12, and the first outlet solenoid valve 8-1 on the first sample outlet tube 8. The first sampling tube 1 starts sampling the first sampling point 1-1, and collects the samples into the first sampling bottle 8-2 through the first sample outlet tube 8. After the sampling is completed, close the first inlet solenoid valve 1-2, the main sampling tube inlet solenoid valve 12, and the first outlet solenoid valve 8-1 to complete the automatic sampling. After automatic sampling, the system sewage solenoid valve 16-1 is opened to discharge the liquid in the waste liquid tank 15 to the waste liquid storage unit 16, and the system sewage solenoid valve 16-1 is closed after the discharge is completed; In this embodiment, the PLC controller is used to control the opening and closing of the first inlet solenoid valve 1-2, the first outlet solenoid valve 8-1, the flushing water inlet solenoid valve 13-1, the sampling sewage solenoid valve 14-1, and the system sewage solenoid valve 16-1.

[0037] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0038] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0039] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A multi-point automatic sampling system, characterized in that: The system comprises a plurality of sampling tubes, each of which extends to a plurality of sampling points, and each of which has an outlet connected to a main sampling tube, and each of which is provided with an inlet electromagnetic valve. The outlet end of the total sampling tube is connected to a precision filtration unit, the precision filtration unit is connected to a total sample outlet tube, the total sample outlet tube is connected to the inlet ends of multiple sample outlet tubes, and the multiple sample outlet tubes correspond to the multiple sampling tubes; the multiple sample outlet tubes are each provided with an outlet solenoid valve, and the outlet ends of the multiple sample outlet tubes are each provided with a sampling bottle; A main sampling tube inlet electromagnetic valve is arranged between the precision filtering unit and the main sampling outlet tube.

2. The system according to claim 1, wherein: The main sample outlet pipe is also connected to a flushing water unit, and a flushing water inlet electromagnetic valve is arranged between the main sample outlet pipe and the flushing water unit.

3. The system according to claim 2, wherein: The outlet end of the total sample outlet pipe is connected with a sewage pipe, and the sewage pipe is provided with a sampling sewage discharge electromagnetic valve.

4. The system according to claim 3, wherein: The sewage pipe is connected with a waste liquid tank, the waste liquid tank is connected with a waste liquid storage unit, and a system sewage discharge solenoid valve is arranged between the waste liquid tank and the waste liquid storage unit.

5. The system according to claim 4, wherein: The system also includes a PLC controller, which is respectively connected to the inlet solenoid valve, the outlet solenoid valve, the flushing water inlet solenoid valve, the sampling sewage solenoid valve, and the system sewage solenoid valve.

6. A multi-point automatic sampling method, characterized in that: Using the multi-point automatic sampling system described in claims 1-5, the method comprises: Open the inlet solenoid valve on the sampling tube, the inlet solenoid valve of the main sampling tube, and the outlet solenoid valve on the sample outlet tube. The sampling tube starts to sample the sampling point and collects the sample into the sampling bottle through the sample outlet tube. After the sampling is completed, close the inlet solenoid valve, the inlet solenoid valve of the main sampling tube, and the outlet solenoid valve to complete the automatic sampling.

7. The method according to claim 6, wherein: The method also includes: before the sampling tube starts sampling the sampling point, opening the inlet solenoid valve on the sampling tube, the main sampling tube inlet solenoid valve, and the sampling sewage discharge solenoid valve to discharge the residual sample liquid in the sampling tube, and closing the main sampling tube inlet solenoid valve after the sewage discharge is completed to complete the emptying of the residual sample liquid in the sampling tube.

8. The method according to claim 7, wherein: After the residual sample liquid in the sampling tube is emptied, the flushing water inlet solenoid valve is opened to flush the total sample outlet tube. After the flushing is completed, the flushing water inlet solenoid valve, the sampling and sewage solenoid valve, and the inlet solenoid valve are closed to complete the flushing of the total sample outlet tube.

9. The method according to claim 6, wherein: The method further comprises: after completing the automatic sampling, opening the system sewage discharge solenoid valve to discharge the liquid in the waste liquid tank to the waste liquid storage unit, and closing the system sewage discharge solenoid valve after the discharge is completed.

10. The method according to claims 6-9, wherein: The inlet solenoid valve, outlet solenoid valve, flushing water inlet solenoid valve, sampling sewage solenoid valve, and system sewage solenoid valve are respectively controlled to open and close through a PLC controller.

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