CN209927389U - Blockage detection device of CEMS system sampling probe - Google Patents
Blockage detection device of CEMS system sampling probe Download PDFInfo
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- CN209927389U CN209927389U CN201921113167.3U CN201921113167U CN209927389U CN 209927389 U CN209927389 U CN 209927389U CN 201921113167 U CN201921113167 U CN 201921113167U CN 209927389 U CN209927389 U CN 209927389U
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Abstract
The utility model discloses a CEMS system sampling probe's jam detection device, original structurally, installed pressure transmitter, signal cable and pressure signal controller additional, pressure transmitter installs and sweeps the compressed air pipeline, gathers the atmospheric pressure value that sweeps in the compressed air pipeline, and signal cable sends to the pressure signal controller, produces alarm signal, sends to the control room. The utility model discloses a judge the pressure release condition of pipeline, detect whether the sampling probe blocks up, needn't artifical periodic disassembly, real-time adjustment judgement standard, the detection means is more accurate with sweep the solenoid valve linkage, can judge whether the solenoid valve is out of order.
Description
Technical Field
The utility model belongs to the technical field of the sensing, concretely relates to pressure measurement.
Background
Along with the rapid development of industry, the problem of air pollution is more and more severe, the current environmental protection problem is more and more prominent, a coal-fired power generating set realizes green power generation through desulfurization, denitration and the like, and becomes the focus of environmental monitoring, so the reliability of the automatic flue gas monitoring CEMS system is more and more important.
The first link of the CEMS system is flue gas sampling, namely the system conveys flue gas in a flue to an analyzer from a sampling probe through a sampling pump, and the flue gas has certain dust content, so that the sampling probe is frequently blocked in long-term operation, the actual flue gas cannot be measured by the analyzer, and the measured data is distorted.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the problem that prior art exists, provide a CEMS system sampling probe's jam detection device, in order to realize above-mentioned purpose, the following technical scheme has been adopted to the invention.
CEMS system includes sampling probe, sweep the solenoid valve, sweep the compressed air pipeline, flue gas sampling pipeline, the sampling pump, the analysis appearance, analysis appearance rack and control room, structurally, install pressure transmitter additional here, signal cable and pressure signal controller, the one end and the pressure transmitter of signal cable are connected, the other end and pressure signal controller are connected, pressure transmitter installs in sweeping the compressed air pipeline, be close to and sweep the solenoid valve, gather the atmospheric pressure value in sweeping the compressed air pipeline, send the atmospheric pressure value to the pressure signal controller, the pressure signal controller is installed at the analysis appearance rack, connect with the control room, predetermine the atmospheric pressure value, if be less than the atmospheric pressure value that pressure transmitter sent, then produce alarm signal, send to the control room.
Further, the pressure transmitter collects the air pressure value of the blowing compressed air pipeline, converts the air pressure value into a current value of 4-20mA, corresponds to the current air pressure value P, and sends the current value to the pressure signal controller.
Further, emptying the sampling probe, starting the purging electromagnetic valve, presetting the current air pressure value as P2, blocking the sampling probe, starting the purging electromagnetic valve, and presetting the current air pressure value as P4.
Further, the preset air pressure value P3, P4> P3> P2 receive the signal of the action of the purge solenoid valve, if the purge solenoid valve is started, the signal is compared with the current air pressure value P, and if the purge solenoid valve is not started, the preset air pressure value P1 is preset.
Furthermore, the electromagnetic valve is started, if P is equal to P1, an alarm signal is generated to prompt that the purging electromagnetic valve is in failure, and if P is greater than P3, an alarm signal is generated to prompt that the sampling probe needs to be cleaned.
The utility model monitors the air pressure of the blowing compressed air pipeline in real time, and detects whether the sampling probe is blocked by judging the pressure relief condition of the pipeline, so that the sampling probe is not required to be manually and periodically disassembled; the pipeline air pressure in a full pressure state and an air pressure state is measured, the judgment standard is adjusted in real time, and the detection means is more accurate; the purging electromagnetic valve is linked, and detection is performed when the electromagnetic valve is started, so that unnecessary loss is reduced; when the purging electromagnetic valve is started, whether the electromagnetic valve has a fault can be judged by judging the pressure relief condition of the pipeline.
Drawings
Fig. 1 is a structural view of the present apparatus.
Detailed Description
The technical scheme of the utility model is explained in detail with the attached drawings.
The structure of the CEMS system is shown in FIG. 1: the sampling probe is connected with a sampling pump through a flue gas sampling pipeline, the sampling pump is connected with an analyzer, and the sampling pump and the analyzer are installed on an analyzer cabinet; and the other end of the sampling probe is provided with a purging electromagnetic valve which is connected with a purging compressed air pipeline.
The working principle of the CEMS system is as follows: during the sampling work period, the purging electromagnetic valve is closed, the sampling probe extends into the flue to collect flue gas, the flue gas enters the sampling probe and reaches the sampling pump along the flue gas sampling pipeline, and the analyzer analyzes the gas in the sampling pump; and during cleaning and maintenance, starting the purging electromagnetic valve, and allowing high-pressure gas in the purging compressed air pipeline to enter the sampling probe from the purging electromagnetic valve to blow away smoke dust of the sampling probe.
The utility model discloses structural at original CEMS system, installed pressure transmitter, signal cable and pressure signal controller additional, as shown in FIG. 1: one end of the signal cable is connected with the pressure transmitter, the other end of the signal cable is connected with the pressure signal controller, the pressure transmitter is arranged on a blowing compressed air pipeline and is close to a blowing electromagnetic valve, and the pressure signal controller is arranged on an analyzer cabinet and is connected with a control chamber.
The working principle of the blockage detection device of the CEMS system sampling probe is as follows:
blocking the sampling probe, keeping the sampling probe closed, enabling the gas to not enter and exit, starting a purging electromagnetic valve, collecting an air pressure value of a purging compressed air pipeline by using a pressure controller, converting the air pressure value into a current value of 4-20mA, sending the current value to the pressure signal controller, enabling the gas not to leak at the moment, keeping the air pressure value unchanged, reaching a saturated state, and presetting the current air pressure value as P4, which is the upper limit of the air pressure value in the purging compressed air pipeline;
emptying the sampling probe, keeping the sampling probe free from any blockage, enabling gas to freely and smoothly enter and exit, starting the purging electromagnetic valve, enabling high-pressure gas in the purging compressed air pipeline to enter the sampling probe from the purging electromagnetic valve and be blown out from the sampling probe, collecting the air pressure value of the purging compressed air pipeline by using the pressure controller, and sending the air pressure value to the pressure signal controller, wherein the air pressure value is continuously reduced due to continuous leakage of the gas caused by positive and negative pressure difference until the air pressure is not changed any more, at the moment, the air pressure of the purging compressed air pipeline is leveled with the outside, and the current air pressure value is preset to be P2, which is the lower limit of the air pressure value in the purging compressed air pipeline;
closing the purging electromagnetic valve, enabling high-pressure gas in the purging compressed air pipeline to be incapable of entering the sampling probe and be completely sealed in the pipeline, and acquiring the air pressure value of the purging compressed air pipeline by the pressure transmitter, wherein the air pressure value is preset as P1 and is close to and slightly larger than P4;
presetting an air pressure value P3, enabling P4> P3> P2 to receive a signal of the action of a purge solenoid valve, starting detection, acquiring the current air pressure value P of a purge compressed air pipeline by a pressure controller, sending the current air pressure value P to the pressure signal controller, and comparing the current air pressure value P with P1, P2, P3 and P4:
if P is P1, the gas is completely sealed in the pipeline and cannot pass through the purge electromagnetic valve, but the purge electromagnetic valve is already received to act, the purge electromagnetic valve is indicated to be in fault, and an alarm signal is sent out;
if P is P4, the gas passes through the purge solenoid valve but cannot leak out through the sampling probe, the sampling probe is completely blocked, and an alarm signal is sent out;
if P is P2, the gas passes through the purge solenoid valve and the sampling probe, freely and smoothly leaks, and the sampling probe does not need to be cleaned;
if P > P3, it is shown that the gas can partially leak through the sampling probe, the sampling probe is partially blocked and needs to be cleaned, the numerical value of P3 is adjusted according to the actual use requirement, P3 is increased, the tolerance to the blocking condition is improved, P3 is reduced, and the tolerance to the blocking condition is reduced.
The above-mentioned embodiments of the present invention are not intended to limit the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention are all included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a CEMS system sampling probe's jam detection device, CEMS system include the sampling probe, sweep the solenoid valve, sweep compressed air pipeline, flue gas sampling pipeline, sampling pump, analysis appearance rack and control room, its characterized in that includes: the pressure transmitter, the signal cable and the pressure signal controller;
one end of the signal cable is connected with the pressure transmitter, and the other end of the signal cable is connected with the pressure signal controller;
the pressure transmitter is arranged on the purging compressed air pipeline and is close to the purging electromagnetic valve;
the pressure signal controller is arranged on the analyzer cabinet and connected with the control chamber.
2. A plug detection apparatus for a CEMS system sampling probe according to claim 1, wherein the pressure transmitter comprises:
collecting the air pressure value of the blowing compressed air pipeline, converting the air pressure value into a current value of 4-20mA, corresponding to the current air pressure value P, and sending the current value to the pressure signal controller.
3. A plug detection apparatus for a CEMS system sampling probe according to claim 2, wherein the pressure signal controller comprises:
emptying the sampling probe, starting a purging electromagnetic valve, and presetting the current air pressure value as P2;
blocking the sampling probe, starting the purge solenoid valve, and presetting the current air pressure value as P4.
4. A CEMS system sampling probe occlusion detection apparatus as in claim 3, wherein the pressure signal controller comprises:
the preset air pressure value P3, P4, P3 and P2 are used for receiving a signal of the action of the purge solenoid valve, comparing the signal with the current air pressure value P if the purge solenoid valve is started, and presetting the preset air pressure value P1 if the purge solenoid valve is not started.
5. A CEMS system sampling probe occlusion detection apparatus as in claim 4, wherein the pressure signal controller comprises:
starting the electromagnetic valve, and if P is P1, generating an alarm signal to prompt the purging electromagnetic valve to have a fault;
if P > P3, an alarm signal is generated to alert the sampling probe that cleaning is required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921113167.3U CN209927389U (en) | 2019-07-16 | 2019-07-16 | Blockage detection device of CEMS system sampling probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921113167.3U CN209927389U (en) | 2019-07-16 | 2019-07-16 | Blockage detection device of CEMS system sampling probe |
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| Publication Number | Publication Date |
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| CN209927389U true CN209927389U (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921113167.3U Expired - Fee Related CN209927389U (en) | 2019-07-16 | 2019-07-16 | Blockage detection device of CEMS system sampling probe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111897027A (en) * | 2020-07-22 | 2020-11-06 | 中国石油化工股份有限公司 | Anti-blocking detection cleaning device and method for CEMS probe |
| CN113188723A (en) * | 2021-04-26 | 2021-07-30 | 国家能源集团谏壁发电厂 | Performance detection device and detection method for smoke emission monitoring sampling probe |
| CN113790879A (en) * | 2021-09-14 | 2021-12-14 | 湖北三江航天万山特种车辆有限公司 | Device and method for detecting unobstructed air path |
| CN114459840A (en) * | 2021-12-31 | 2022-05-10 | 天津津普利环保科技股份有限公司 | Intelligent diagnosis and protection system for gas sampling system and diagnosis and protection method thereof |
-
2019
- 2019-07-16 CN CN201921113167.3U patent/CN209927389U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111897027A (en) * | 2020-07-22 | 2020-11-06 | 中国石油化工股份有限公司 | Anti-blocking detection cleaning device and method for CEMS probe |
| CN113188723A (en) * | 2021-04-26 | 2021-07-30 | 国家能源集团谏壁发电厂 | Performance detection device and detection method for smoke emission monitoring sampling probe |
| CN113188723B (en) * | 2021-04-26 | 2024-02-02 | 国家能源集团谏壁发电厂 | Performance detection device and detection method for smoke emission monitoring sampling probe |
| CN113790879A (en) * | 2021-09-14 | 2021-12-14 | 湖北三江航天万山特种车辆有限公司 | Device and method for detecting unobstructed air path |
| CN113790879B (en) * | 2021-09-14 | 2024-02-13 | 湖北三江航天万山特种车辆有限公司 | Device and method for detecting unobstructed gas path |
| CN114459840A (en) * | 2021-12-31 | 2022-05-10 | 天津津普利环保科技股份有限公司 | Intelligent diagnosis and protection system for gas sampling system and diagnosis and protection method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200110 Termination date: 20200716 |
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| CF01 | Termination of patent right due to non-payment of annual fee |