CN215982599U - On-line analysis sample collecting and processing device - Google Patents
On-line analysis sample collecting and processing device Download PDFInfo
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- CN215982599U CN215982599U CN202122395517.3U CN202122395517U CN215982599U CN 215982599 U CN215982599 U CN 215982599U CN 202122395517 U CN202122395517 U CN 202122395517U CN 215982599 U CN215982599 U CN 215982599U
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Abstract
The utility model discloses an online analysis sample collecting and processing device which is characterized by comprising a buffer tube, wherein the buffer tube is connected with sample tail gas of at least one online analysis instrument; the device also comprises a pneumatic vacuum pump or a Venturi tube, and a power gas source is connected with a power gas inlet of the pneumatic vacuum pump or the Venturi tube through a power gas valve, a second pressure regulating valve and a second pressure sensor; the buffer tube is connected with a suction inlet of the pneumatic vacuum pump or the Venturi tube through an exhaust valve, a regulating loop is arranged at the downstream of the exhaust valve and connected to the upstream of the power gas inlet, and a first pressure regulating valve and a first pressure sensor are arranged on the regulating loop; the exhaust port of the pneumatic vacuum pump or venturi is connected to a torch. The device collects the tail gas of the sample and sends the tail gas into gas treatment facilities such as a torch and the like on the premise of ensuring the stable operation of the on-line analysis instrument, thereby reducing the influence on the environment.
Description
Technical Field
The utility model belongs to the technical field of chemical on-line analysis, and relates to an on-line analysis sample collecting and processing device.
Background
With the development of economy and the continuous improvement of the analysis technology level, chromatographs, infrared analyzers and the like are gradually popularized and widely applied in China as efficient, rapid and high-sensitivity modern analyzers, and online analyzers applied to industrial devices provide timely data reference for the operation and control of continuous production devices such as petrochemical engineering and the like. However, due to technical requirements, when online analytical instruments such as a chromatograph and an infrared analyzer work normally, a stable back pressure is required at a sample discharge point, the detection result of the analytical instruments is seriously affected by pressure changes, and a slight pressure fluctuation causes a huge error of the analysis result, so that in order to measure stably, the discharge points of the online analytical instruments are direct atmosphere, and the stable atmospheric pressure is used as the back pressure. Although the sample amount is very small, about 500ml/min, with the increasing environmental protection requirement of the country, the emission of toxic and harmful samples to the atmosphere is limited, and how to ensure that the normal work of an on-line analysis meter is not influenced, and meanwhile, the samples can be effectively collected and processed without influencing the environment is urgent.
Disclosure of Invention
In view of the defects of the prior art, the utility model aims to provide an on-line analysis sample collection and processing device, which automatically controls to provide stable back pressure for a discharge point of a sample, collects the sample and discharges the collected sample to processing facilities such as a torch and the like, and does not pollute the environment.
The utility model adopts the following technical scheme:
the on-line analysis sample collecting and processing device is characterized by comprising a buffer tube, wherein the sample tail gas of at least one on-line analysis instrument is connected with the buffer tube; the device also comprises a pneumatic vacuum pump or a Venturi tube, and a power gas source is connected with a power gas inlet of the pneumatic vacuum pump or the Venturi tube through a power gas valve, a second pressure regulating valve and a second pressure sensor;
the buffer tube is connected with a suction inlet of the pneumatic vacuum pump or the Venturi tube through an exhaust valve, a regulating loop is arranged at the downstream of the exhaust valve and connected to the upstream of the power gas inlet, and a first pressure regulating valve and a first pressure sensor are arranged on the regulating loop; the exhaust port of the pneumatic vacuum pump or venturi is connected to a torch.
Further, a flow sensor and a third pressure sensor are arranged between the suction inlet of the pneumatic vacuum pump or the Venturi tube and the access point of the regulating circuit.
The on-line analysis instrument is connected with a process pipeline and can analyze and measure the content of substances or physical and chemical parameters in the gas in real time on line. Including but not limited to on-line chromatographs, on-line infrared analyzers, oxygen analyzers, distillation analyzers, octane number testers, flash and cloud point testers, and the like.
Furthermore, the first pressure regulating valve and the second pressure regulating valve are self-operated regulating valves, and can regulate and set the outlet pressure.
Furthermore, the first pressure regulating valve is connected with the first pressure sensor in a cascade control mode, and the second pressure regulating valve is connected with the second pressure sensor in a cascade control mode; or connect DCS, realize the remote automatic control.
Furthermore, the flow sensor is connected with the DCS, and the running state of the device is monitored remotely.
Further, an evacuation valve and a fourth pressure sensor are arranged at the downstream of the exhaust port of the pneumatic vacuum pump or the Venturi tube.
Further, a safety valve is arranged at the downstream of the exhaust valve.
Further, the power gas source is preferably nitrogen.
The utility model has the beneficial effects that:
the device for collecting and processing the online analysis sample provides a stable back pressure for the online analysis instrument through reasonable flow setting and combining with technologies such as automatic control and the like, and intensively collects the sample tail gas and sends the collected sample tail gas into gas processing facilities such as a torch and the like, thereby reducing the influence on the environment and having strong environmental protection benefit; when the device is used, the pressure change of a torch and the like and the change of the discharge amount of an online analysis instrument can be overcome, automatic control is realized according to the situation, and manual intervention is not needed. On the premise of ensuring the stable operation of the chemical on-line analysis instrument, the utility model thoroughly eliminates the discharge of toxic and harmful samples to the atmosphere and reduces the hidden trouble of environmental pollution.
Drawings
FIG. 1 is a schematic view of the structure of an on-line analytical sample collection and processing device according to the present invention;
in the figure, AT-1 to AT-n are a plurality of parallel online analytical instruments, V1 is an exhaust valve, V2 is a nitrogen valve, V3 is an evacuation valve, PV1 is a first pressure regulating valve, PV2 is a second pressure regulating valve, PT1 is a first pressure sensor, PT2 is a second pressure sensor, PT3 is a third pressure sensor, PT4 is a fourth pressure sensor, FT is a flow sensor, PSV is a safety valve, and PUMP is a pneumatic vacuum PUMP or a venturi tube.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, a specific implementation manner of the present invention is described below with reference to the accompanying drawings. It is to be understood that the following examples and drawings are merely illustrative of one embodiment of the present invention and are not to be construed as limiting the utility model.
As shown in FIG. 1, the on-line analysis sample collection and processing device of the present invention comprises a plurality of AT-1-AT-n parallel on-line analysis instruments, such as a commonly used on-line chromatograph, an on-line infrared analyzer, etc.; the device is provided with a buffer tube, and sample tail gas of online analytical instruments AT-1-AT-n is connected to the buffer tube; the device also comprises a pneumatic vacuum PUMP or a Venturi tube PUMP, wherein power is from a nitrogen gas source and is connected with a power gas inlet of the pneumatic vacuum PUMP or the Venturi tube PUMP through a nitrogen gas valve V2, a second pressure regulating valve PV2 and a second pressure sensor PT 2; the exhaust of the pneumatic vacuum PUMP or venturi PUMP is connected to a torch via a fourth pressure sensor PT4, evacuation valve V3.
An exhaust valve V1 is arranged on the buffer tube, and is connected to a suction inlet of the pneumatic vacuum PUMP or the Venturi tube PUMP after passing through a flow sensor FT and a third pressure sensor PT3, an outlet of the exhaust valve V1 is provided with an access point and is connected with a nitrogen pipeline at the upstream of the power gas inlet through a regulating loop, and a first pressure regulating valve PV1 and a first pressure sensor PT1 are arranged on the regulating loop; a relief valve PSV is also provided downstream of the vent valve V1.
The online analysis sample collection and processing device can control the pressure stability AT the first pressure sensor PT1, and when the online analysis meter AT1-ATn comes the change of the sample gas flow or the change of the pressure AT the emptying valve V3, the pressure stability AT the first pressure sensor PT1 can be maintained by automatically adjusting the first pressure adjusting valve PV 1.
The exhaust valve V1, the nitrogen valve V2 and the emptying valve V3 can adopt ball valves which are manually opened and closed, the first pressure regulating valve PV1 and the second pressure regulating valve PV2 are self-operated regulating valves which can be regulated and set the outlet pressure, and the first pressure regulating valve PV1 is connected with the first pressure sensor PT1, the second pressure regulating valve PV2 is connected with the second pressure sensor PT2 in series control; or connect DCS, realize the remote automatic control. Wherein, the FT signal of the flow sensor is transmitted to the DCS, and the running state of the device is monitored remotely.
The PUMP is a gas pressurizing device, can be a pneumatic vacuum PUMP, and can also be a processing device such as a Venturi tube and the like which can generate vacuum.
Nitrogen is introduced in front of the nitrogen valve V2, and in the device of the embodiment, the nitrogen is used as power gas and also used as supplementary gas for adjusting the pressure at the first pressure sensor PT 1.
For the tail gas (normally 600ml/min) collection treatment of one online analytical instrument sample, closing an exhaust valve V1, setting the pressure of a first pressure regulating valve PV1 at 0.2Kpa, opening a nitrogen valve V2 and an exhaust valve V3, and regulating a second pressure regulating valve PV2 to enable a flow sensor FT to indicate about 1200 ml/min; and opening the exhaust valve V1, accessing the tail gas of the sample of the online analytical instrument, and collecting and conveying the tail gas of the sample to gas treatment facilities such as a torch and the like through a pneumatic vacuum PUMP or a Venturi tube PUMP.
When n on-line analytical instruments AT-1-AT-n sample tail gases exist, the flow sensor FT is enabled to indicate the flow adaptive to the sample tail gases of the n analytical instruments, namely (n +1) × 600ml/min, and the corresponding pipe diameter, the first pressure regulating valve PV1, the second pressure regulating valve PV2, the flow sensors FT and PUMP are selected according to the actual flow range.
The device has strong expansibility, and can select proper components according to different working conditions to achieve the same purpose; the PUMP can be selected in various ways, can be a pneumatic vacuum PUMP or a Venturi vacuum generator, does not need power such as a power supply and the like, does not have explosion-proof requirements, and the Venturi vacuum generator has no wearing parts and can be free of maintenance;
the safety valve PSV is arranged to prevent equipment from being damaged due to overpressure; signals of the first pressure sensor PT1, the flow sensor FT and the like can be sent to the DCS according to selection, and the running state of the device can be monitored remotely.
Claims (9)
1. The on-line analysis sample collecting and processing device is characterized by comprising a buffer tube, wherein the sample tail gas of at least one on-line analysis instrument is connected with the buffer tube; the device also comprises a pneumatic vacuum pump or a Venturi tube, and a power gas source is connected with a power gas inlet of the pneumatic vacuum pump or the Venturi tube through a power gas valve, a second pressure regulating valve and a second pressure sensor; the buffer tube is connected with a suction inlet of the pneumatic vacuum pump or the Venturi tube through an exhaust valve, a regulating loop is arranged at the downstream of the exhaust valve and connected to the upstream of the power gas inlet, and a first pressure regulating valve and a first pressure sensor are arranged on the regulating loop; the exhaust port of the pneumatic vacuum pump or venturi is connected to a torch.
2. The on-line analytical sample collection processing device of claim 1, wherein a flow sensor and a third pressure sensor are provided between the suction inlet of the pneumatic vacuum pump or venturi and a conditioning circuit access point.
3. The on-line analysis sample collection and processing device of claim 1, wherein the on-line analyzer is an analyzer connected to a process line for on-line real-time analysis of the content of substances or physicochemical parameters in the measured gas.
4. The on-line analytical sample collection processing device of claim 1 wherein the first and second pressure regulating valves are self-operated regulating valves.
5. The on-line analytical sample collection and processing device of claim 1, wherein the first pressure regulating valve is connected to the first pressure sensor, the second pressure regulating valve is connected to the second pressure sensor in a cascade control manner, or is connected to a DCS.
6. The on-line analytical sample collection processing device of claim 2, wherein the flow sensor is connected to a DCS.
7. The on-line analytical sample collection processing device of claim 1 wherein an evacuation valve and a fourth pressure sensor are provided downstream of the exhaust of the pneumatic vacuum pump or venturi.
8. The on-line analytical sample collection processing device of claim 1 wherein a safety valve is provided downstream of the vent valve.
9. The on-line analytical sample collection processing device of claim 1 wherein the powered gas source is nitrogen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122395517.3U CN215982599U (en) | 2021-09-30 | 2021-09-30 | On-line analysis sample collecting and processing device |
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| CN202122395517.3U CN215982599U (en) | 2021-09-30 | 2021-09-30 | On-line analysis sample collecting and processing device |
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| CN215982599U true CN215982599U (en) | 2022-03-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115289395A (en) * | 2022-07-07 | 2022-11-04 | 宁波百畅自动化科技有限公司 | Gas recovery system for online analysis and recovery control method thereof |
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2021
- 2021-09-30 CN CN202122395517.3U patent/CN215982599U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115289395A (en) * | 2022-07-07 | 2022-11-04 | 宁波百畅自动化科技有限公司 | Gas recovery system for online analysis and recovery control method thereof |
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