CN223259693U - Online continuous monitoring system for high-concentration carbon dioxide - Google Patents
Online continuous monitoring system for high-concentration carbon dioxideInfo
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- CN223259693U CN223259693U CN202422414700.7U CN202422414700U CN223259693U CN 223259693 U CN223259693 U CN 223259693U CN 202422414700 U CN202422414700 U CN 202422414700U CN 223259693 U CN223259693 U CN 223259693U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
本实用新型涉及一种高浓度二氧化碳在线连续监测系统。包括采样探头、抽气泵和CO2分析仪，采样探头与抽气泵的入口通过采样管路连接且在该管路上安装有采样阀、过滤器和冷凝器，在抽气泵的出口同时连接有放空管路和测量管路，测量管路连接至CO2分析仪的进气口且在测量管路上安装有过滤器和冷凝器，CO2分析仪的排气口连接至另一个放空管路；还包括半程标定管路和全程标定管路，半程标定管路的一端连接至设置在测量管路上的换向电磁阀，全程标定管路的一端连接至采样管路；还包括反吹管路。本实用新型具备标定功能以及反吹清洁采样探头的功能，通过对系统施加标定以及保持采样探头清洁来提升CO2浓度的监测的准确性。
The utility model relates to an online continuous monitoring system for high-concentration carbon dioxide. It includes a sampling probe, an air pump, and a CO2 analyzer. The sampling probe is connected to the inlet of the air pump through a sampling pipeline, and a sampling valve, a filter, and a condenser are installed on the pipeline. The outlet of the air pump is connected to a vent pipeline and a measuring pipeline at the same time. The measuring pipeline is connected to the air inlet of the CO2 analyzer and a filter and a condenser are installed on the measuring pipeline. The exhaust port of the CO2 analyzer is connected to another vent pipeline. The system also includes a half-range calibration pipeline and a full-range calibration pipeline. One end of the half-range calibration pipeline is connected to a reversing solenoid valve provided on the measuring pipeline, and one end of the full-range calibration pipeline is connected to the sampling pipeline. The system also includes a backflush pipeline. The utility model has a calibration function and a backflush cleaning function for the sampling probe. By calibrating the system and keeping the sampling probe clean, the accuracy of CO2 concentration monitoring is improved.
Description
Technical Field
The utility model belongs to the technical field of online monitoring equipment, and particularly relates to an online continuous monitoring system for high-concentration carbon dioxide.
Background
Carbon dioxide emission is an important content of national carbon monitoring, is a basic stone for realizing national carbon peak carbon neutralization, and the emission reduction of carbon dioxide depends on an accurate carbon emission monitoring system. The current monitoring means and technical foundation of carbon dioxide are weak, and particularly when the concentration of carbon dioxide discharged by enterprises is high, the high-concentration carbon dioxide monitoring technology is still to be further improved. There are currently higher precision CO 2 analyzers, however monitoring systems based on CO 2 analyzers also require the configuration of suitable sampling means and the provision of suitable calibration means for the CO 2 analyzer and the whole system to ensure accurate measurement of carbon dioxide concentration.
The specification of Chinese patent No. 116819011A discloses a key link carbon dioxide monitoring system and method of a coal-fired power plant, and the technical scheme disclosed by the patent only considers sampling and measurement of the system, and in the practical application of equipment, because the flue gas generally contains water vapor, particles or crystals, the blockage of a probe pipeline is easy to occur, the reduction of the sampling gas is caused, the accuracy of measurement data is seriously influenced, and the quality of the sample gas is ensured to be particularly important in the scene of monitoring the concentration of high-concentration carbon dioxide. On the other hand, as the applicable time passes, the monitoring device also needs to maintain the calibration regularly so as to ensure the accuracy of the measurement data.
The existing CO 2 monitoring system is difficult to meet the requirements, accurate monitoring data about the concentration of CO 2 is difficult to continuously obtain, and further development and design of the monitoring system are required.
Disclosure of utility model
The utility model aims to provide a high-concentration carbon dioxide online continuous monitoring system which has the functions of calibrating and back-blowing cleaning a sampling probe, and the accuracy of monitoring the concentration of CO 2 is improved by applying calibration to the system and keeping the sampling probe clean.
The technical scheme includes that the high-concentration carbon dioxide online continuous monitoring system comprises a sampling probe, an air pump, a CO 2 analyzer, a half-way calibration pipeline, a full-way calibration pipeline, a reversing valve, a standard gas supply pipeline, a half-way calibration pipeline and a full-way calibration pipeline, wherein the sampling probe is connected with an inlet of the air pump through a sampling pipeline, a sampling valve, a filter and a condenser are arranged on the pipeline, an outlet of the air pump is simultaneously connected with a vent pipeline and a measuring pipeline, the measuring pipeline is connected to an air inlet of the CO 2 analyzer, the filter and the condenser are arranged on the measuring pipeline, an air outlet of the CO 2 analyzer is connected to the other vent pipeline, the full-way calibration pipeline further comprises the half-way calibration pipeline and the full-way calibration pipeline, one end of the full-way calibration pipeline is connected to the sampling pipeline, the other ends of the standard gas supply pipeline, the half-way calibration pipeline and the full-way calibration pipeline are connected through the manual reversing valve, and the reversing valve are arranged between the sampling probe and the sampling valve on the sampling pipeline.
The device comprises a probe box, a cabinet, a sampling probe, a sampling valve, a blowback valve, a sucking pump, a CO 2 analyzer, a filter and a condenser, wherein the sampling probe, the sampling valve and the blowback valve are arranged in the probe box, a sleeve pipe used for being connected with an exhaust pipeline is arranged on the probe box, the sampling probe is positioned in the sleeve pipe, the probe box is provided with a blowback air source interface, the sucking pump, the CO 2 analyzer, the filter and the condenser are arranged in the cabinet, and the cabinet is provided with a sample inlet, an air outlet and a standard air source interface.
Preferably, a heat tracing pipeline is arranged on a sampling pipeline between the probe box and the cabinet, and the sample gas output by the probe box is conveyed into the cabinet in a whole-course heat tracing mode.
Preferably, the filter on the sampling pipe is a dust removing filter, the filter on the measuring pipe comprises a dust removing filter and a hydrophobic filter, the reversing electromagnetic valve is positioned between the condenser on the measuring pipe and the dust removing filter, and the device also comprises a humidity alarm connected with the dust removing filter.
Preferably, a hygrometer is installed between the filter and the condenser on the sampling pipe, and a pressure switch is installed between the condenser and the air pump on the sampling pipe.
Preferably, a flow meter is installed on the blow-down pipe connected to the air pump, and a flow meter is installed on the pipe of the measurement pipe, between the hydrophobic filter and the CO 2 analyzer.
Preferably, a water collecting tank is also arranged in the cabinet, the sampling pipeline and the water outlet of the condenser on the measuring pipeline are connected to the water collecting tank through pipelines, and a peristaltic pump is arranged on the pipeline.
Preferably, the back-blowing pipeline adopts compressed air as a back-blowing air source, a pressure regulating control valve and an air storage tank are further arranged in the probe box, a back-blowing air source interface is connected to the pressure regulating control valve through a pipeline, the pressure regulating control valve is connected to an inlet of the air storage tank through a pipeline, an outlet of the air storage tank is connected with the back-blowing valve through a pipeline, a drain pipe is further connected to a drain outlet of the air storage tank, and a manual ball valve is arranged on the drain pipe.
The utility model has the advantages and positive effects that:
Compared with the existing carbon dioxide monitoring system, the monitoring system provided by the utility model is provided with the back-flushing pipeline, and a back-flushing air source is adopted to carry out back-flushing cleaning on the sampling probe, so that sediment in the sampling probe is removed, the problem of blockage of the sampling probe is solved, the collected sample gas volume is kept stable, and the accuracy of CO 2 concentration measurement is guaranteed. The monitoring system is provided with a half-path calibration pipeline and a whole-path calibration pipeline, the on-off of the calibration pipeline is controlled by adopting a manual reversing valve and a reversing electromagnetic valve, the measurement pipeline where the CO 2 analyzer is positioned is adopted when the half-path calibration pipeline is conducted, the full-path pipeline is adopted when the whole-path calibration pipeline is conducted, and the accuracy of the concentration measurement of CO 2 is ensured by applying necessary calibration operation to the CO 2 analyzer.
By arranging the sampling valve, the blowback valve, the reversing electromagnetic valve and the like, the system is allowed to adopt the changes of control channels such as a pretreatment control center, an industrial personal computer and the like, so that the monitoring system can controllably realize multiple functions such as sampling analysis, calibration, pipeline cleaning and the like.
Drawings
FIG. 1 is a schematic diagram of the system architecture of the present utility model;
fig. 2 is a schematic view of the application state of the present utility model.
Detailed Description
In order to further understand the summary, features and advantages of the present utility model, the following examples are set forth in detail.
Referring to fig. 1, the high-concentration carbon dioxide on-line continuous monitoring system of the utility model comprises a probe box and a cabinet. The probe box and the accessory parts thereof are additionally arranged on the exhaust pipeline to realize the sampling function of the exhaust flue gas, sample gas is obtained, and the cabinet and the accessory parts thereof receive the sample gas by the probe box to measure the concentration of CO 2 in the sample gas.
According to the flowing direction of the sample gas, the online continuous monitoring system comprises a sampling probe, an air pump and a CO 2 analyzer, wherein the sampling probe is connected with an inlet of the air pump through a sampling pipeline, an outlet of the air pump is connected with an air inlet of the CO 2 analyzer through a measuring pipeline, the sampling probe is in a tube shape and is used for obtaining the sample gas from an exhaust pipeline, the air pump is used for providing flowing power for the sample gas, and finally the sample gas enters the CO 2 analyzer for processing, and the concentration value of CO 2 is obtained through measurement. The CO 2 analyzer is a prior art and its structure, function and principle are not described in detail.
The sampling valve is an electric control valve and is used for controlling the on-off between the sampling probe and the sampling pipeline, the filter is a dust removing filter and is used for filtering dust particles in the trapped sample gas, and the condenser is used for condensing and removing water from the sample gas and removing water vapor in the sample gas to dry the sample gas.
In this embodiment, install the hygrometer between filter and the condenser on the sampling line, install pressure switch between condenser and the aspiration pump on the sampling line, wherein the hygrometer is used for measuring the humidity value of the sample gas of passing through, and pressure switch is used for measuring the pressure value of the sample gas of passing through.
In this embodiment, as shown in the figure, the probe box comprises a closed box body with an insulation layer, the sampling probe and the sampling valve are arranged in the probe box, a sleeve pipe for connecting with an exhaust pipeline is arranged on the probe box, and the sampling probe is positioned in the sleeve pipe. When the probe box is installed and used on the exhaust pipeline, the sleeve is inserted into a monitoring interface reserved on the exhaust pipeline, and the sampling probe is used as sample gas by extracting the discharged smoke from the inside of the exhaust pipeline.
The online continuous monitoring system adopts a back blowing means to realize the cleaning of the inside of the sampling probe, removes sediment in the sampling probe through back blowing, enables the inside of the sampling probe to be kept clean, solves the problem of blockage of the sampling probe, restores the effective inner diameter of the sampling probe, and enables the collected sample gas volume to be kept stable, thereby ensuring the accuracy of the concentration measurement of CO 2.
As shown in the figure, the back flushing means adopted comprises a back flushing pipeline, the back flushing pipeline is connected between a sampling probe and a sampling valve on a sampling pipe, the back flushing pipeline is provided with a back flushing valve, the back flushing pipeline adopts compressed air as a back flushing air source, a back flushing air source interface is arranged on a probe box, an external compressed air pipeline is connected to the back flushing air source interface, the back flushing valve is used for controlling the on-off of the back flushing pipeline, and the back flushing valve is an electric control valve.
In this embodiment, still be equipped with pressure regulating control valve and gas holder in the probe case, blowback air source interface is connected to pressure regulating control valve through the pipeline, and pressure regulating control valve passes through the entry of pipeline connection to this gas holder, and the export of this gas holder is connected with the blowback valve through the pipeline, still is connected with the drain pipe at the outlet of this gas holder and is equipped with manual ball valve on the drain pipe. The pressure regulating control valve is used for setting the back blowing pressure of the compressed air for back blowing, the air storage tank is used for buffering the pressure and removing condensate water at the same time, the dry compressed air source finally enters the sampling pipeline under the control of the back blowing valve, at the moment, the sampling valve is closed, the compressed air reversely passes through the sampling probe, the blowing cleaning of the inside of the sampling probe is realized, and the cleaned waste gas enters the exhaust channel. And the condensed water in the air storage tank is discharged by opening a manual valve on a drain pipe of the air storage tank.
The outlet of the air pump is simultaneously connected with a vent pipeline and a measuring pipeline, the measuring pipeline is connected to the air inlet of the CO 2 analyzer, a filter and a condenser are arranged on the measuring pipeline, and the air outlet of the CO 2 analyzer is connected to the other vent pipeline. The vent pipeline that links directly with the export of air pump is used for discharging a portion of sample gas promptly directly to the rack outside, installs the flowmeter on this vent pipeline, and another vent pipeline is used for discharging the sample gas of accomplishing CO 2 concentration measurement, therefore installs two vent on the rack in this embodiment, and two vent pipelines in the cabinet are connected with these two vent respectively.
The filter is used for further filtering the sample gas, and the condenser is used for further removing water vapor in the sample gas and further drying. In this embodiment, the filter on the measurement pipe includes a dust filter for further removing particulate matter in the sample gas and a hydrophobic filter for further dehumidification. The sample gas discharged through the hydrophobic filter has sufficiently removed particulate matters and water vapor, so as to obtain sufficiently clean sample gas, and the concentration measurement requirement of the CO 2 analyzer is met. In this embodiment, a flow meter is installed on the measuring pipe and the pipe between the hydrophobic filter and the CO 2 analyzer for measuring the flow value.
In the embodiment, a water collecting tank is further arranged in the cabinet, a sampling pipeline and a water outlet of the condenser on the measuring pipeline are connected to the water collecting tank through pipelines, a peristaltic pump is arranged on the pipeline and works, and condensed water generated by the condenser is sent into the water collecting tank for storage.
The air pump, the CO 2 analyzer, the inner part of the cabinet of the sampling pipeline, the measuring pipeline and the accessory parts (the filter and the condenser) are arranged in the cabinet, a heat tracing pipeline is arranged on the sampling pipeline between the probe box and the cabinet for better conveying the sample gas, and the sample gas output by the probe box is conveyed into the cabinet in a whole-course heat tracing mode. Further, a sample inlet is provided on the cabinet, an intra-cabinet portion of the sampling line is connected to the sample inlet, and an extra-cabinet portion of the sampling line is connected to the sample inlet.
The system also comprises a half-path calibration pipeline and a whole-path calibration pipeline, wherein the half-path calibration pipeline conveys the standard gas (namely the gas for calibration) to a measurement pipeline where the CO 2 analyzer is located in the cabinet, the whole-path calibration pipeline conveys the standard gas to a whole-path, and when the standard gas passes through the CO 2 analyzer, the calibration program of the CO 2 analyzer is executed, the calibration operation of the CO 2 analyzer is completed, and the accuracy of the concentration measurement of the CO 2 is improved.
One end of the half-range calibration pipeline is connected to a reversing electromagnetic valve arranged on the measuring pipeline, one end of the full-range calibration pipeline is connected to the sampling pipeline, the other ends of the standard gas supply pipeline, the half-range calibration pipeline and the full-range calibration pipeline are connected through a manual reversing valve, the reversing electromagnetic valve is used for controlling the connection and disconnection of the pipeline in an electric control mode, and the manual reversing valve is used for controlling the connection and disconnection of the pipeline in a manual mode.
In this embodiment, the switching-over solenoid valve is located between condenser and the dust removal filter on the survey pipe way, still includes the humidity alarm who is connected with this dust removal filter, and humidity alarm is used for detecting the humidity value of sample gas, produces the warning suggestion when humidity value exceeds standard, and the sample gas that humidity exceeds standard will lead to CO 2 concentration measurement inefficacy.
In the embodiment, the cabinet is provided with the standard gas source interface, so that the convenience of connection of the standard gas supply pipeline and the system is improved.
The operation mode is as follows:
In fig. 2, a schematic diagram of an application state of the online continuous monitoring system is shown, and it can be seen that the CO 2 analyzer sends a digital signal to an industrial personal computer (measurement data) and provides a control signal to a preprocessing control center (running state, operation signal). And the industrial personal computer receives digital signals of the CO 2 analyzer and the preprocessing control center, and performs data display, analysis and storage. The industrial personal computer provides control signals to the preprocessing control center (running state and operation signals). The pretreatment control center can control actions of the sampling valve, the blowback valve, the air pump, the reversing electromagnetic valve 1 and the like.
Connecting a standard gas supply pipeline to a standard gas source interface, connecting a compressed air supply pipeline to a back-blowing gas source interface, and correctly installing a probe box to a monitoring interface preset on an exhaust pipeline;
When the system performs half-range calibration, a manual reversing valve is adopted to conduct a gas-standard supply pipeline and a half-range calibration pipeline, a reversing electromagnetic valve is switched to a half-range calibration channel, namely, the half-range calibration pipeline is conducted with a measurement pipeline, at the moment, an air pump stops working, gas is connected into the system through a gas-standard source interface, the gas passes through the manual reversing valve and the reversing electromagnetic valve, flows through a filter and a hydrophobic filter on a measuring pipeline, enters a CO 2 analyzer through the adjustment of a flowmeter, performs calibration operation on the CO 2 analyzer, and finishes calibration work of the CO 2 analyzer.
When the system performs whole-course calibration, a manual reversing valve is adopted to conduct a standard gas supply pipeline and a whole-course calibration pipeline, standard gas is connected through a standard gas source interface, a sampling valve is closed, a sucking pump sucks the standard gas through the whole-course calibration pipeline and the sampling pipeline, the standard gas enters a sample inlet through a heat tracing pipeline for heating, the standard gas enters a cabinet, particles such as dust are removed through a filter on the sampling pipeline, the particles enter a hygrometer for humidity measurement, a condenser is used for cooling and dewatering, and a peristaltic pump works to take away condensed water and discharge the condensed water into a water collecting tank. The treated standard gas is subjected to pressure measurement through a pressure switch, is divided into two paths through an air pump, one path of the standard gas enters an emptying pipeline through flow regulation of a flow meter and is discharged through an emptying port, the other path of the standard gas enters a condenser on a measuring pipeline through flow regulation of the flow meter to carry out secondary cooling water removal, a peristaltic pump works to discharge condensed water into a water collecting tank, a reversing electromagnetic valve switches the paths, the standard gas is subjected to dust removal through a filter on the measuring pipeline and humidity monitoring (humidity exceeding alarm), and then enters a CO 2 analyzer after being continuously dehumidified through a hydrophobic filter and is discharged from the emptying port.
When the system performs back blowing operation, the air pump stops working, the sampling valve is closed, compressed air enters from a back blowing air source interface, the pressure regulating controller regulates pressure, the back blowing valve is opened, and the compressed air back blows the sampling probe to remove internal sediments.
Claims (8)
1. A high-concentration carbon dioxide on-line continuous monitoring system is characterized by comprising a sampling probe, an air pump, a CO 2 analyzer, a half-way calibration pipeline, a whole-way calibration pipeline, a reversing solenoid valve, a sampling pipeline, a standard gas supply pipeline, a half-way calibration pipeline and a whole-way calibration pipeline, wherein the sampling probe is connected with an inlet of the air pump through a sampling pipeline, a sampling valve, a filter and a condenser are arranged on the pipeline, an outlet of the air pump is simultaneously connected with a vent pipeline and a measuring pipeline, the measuring pipeline is connected to an air inlet of the CO 2 analyzer, the filter and the condenser are arranged on the measuring pipeline, an air outlet of the CO 2 analyzer is connected to the other vent pipeline, the half-way calibration pipeline and the whole-way calibration pipeline are connected to the reversing solenoid valve arranged on the measuring pipeline, one end of the whole-way calibration pipeline is connected to the sampling pipeline, the other ends of the standard gas supply pipeline, the half-way calibration pipeline and the whole-way calibration pipeline are connected through a manual reversing valve, and a back-flushing valve is arranged between the sampling probe and the sampling valve on the sampling pipeline.
2. The on-line continuous monitoring system for high-concentration carbon dioxide according to claim 1, further comprising a probe box and a cabinet, wherein the sampling probe, the sampling valve and the blowback valve are arranged in the probe box, a sleeve pipe for connecting with an exhaust pipeline is arranged on the probe box, the sampling probe is positioned in the sleeve pipe, a blowback air source interface is arranged on the probe box, the air extracting pump, the CO 2 analyzer, the filter and the condenser are arranged in the cabinet, and the sample inlet, the air discharging port and the standard air source interface are arranged on the cabinet.
3. The on-line continuous monitoring system for high concentration carbon dioxide according to claim 2, wherein a heat tracing pipeline is arranged on the sampling pipeline between the probe box and the cabinet, and the sample gas output by the probe box is conveyed into the cabinet in a whole-course heat tracing mode.
4. The on-line continuous monitoring system for high concentration carbon dioxide according to claim 3, wherein the filter on the sampling pipe is a dust removing filter, the filter on the measuring pipe comprises a dust removing filter and a hydrophobic filter, the reversing electromagnetic valve is positioned between the condenser and the dust removing filter on the measuring pipe, and the on-line continuous monitoring system further comprises a humidity alarm connected with the dust removing filter.
5. The on-line continuous monitoring system for high concentration carbon dioxide according to claim 4, wherein a hygrometer is arranged between the filter and the condenser on the sampling pipe, and a pressure switch is arranged between the condenser and the air pump on the sampling pipe.
6. The on-line continuous monitoring system for high concentration carbon dioxide according to claim 5, wherein a flowmeter is installed on the blow-down pipe connected with the air pump, and a flowmeter is installed on the pipeline between the measuring pipe, the hydrophobic filter and the CO 2 analyzer.
7. The on-line continuous monitoring system for high concentration carbon dioxide according to claim 6, wherein a water collecting tank is further arranged in the cabinet, the sampling pipeline and the water outlet of the condenser on the measuring pipeline are connected to the water collecting tank through pipelines, and peristaltic pumps are arranged on the pipelines.
8. The on-line continuous monitoring system for high concentration carbon dioxide according to claim 7, wherein the back blowing pipeline adopts compressed air as a back blowing air source, a pressure regulating control valve and an air storage tank are further arranged in the probe box, a back blowing air source interface is connected to the pressure regulating control valve through a pipeline, the pressure regulating control valve is connected to an inlet of the air storage tank through a pipeline, an outlet of the air storage tank is connected with the back blowing valve through a pipeline, a drain pipe is further connected to a drain outlet of the air storage tank, and a manual ball valve is arranged on the drain pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202422414700.7U CN223259693U (en) | 2024-09-29 | 2024-09-29 | Online continuous monitoring system for high-concentration carbon dioxide |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202422414700.7U CN223259693U (en) | 2024-09-29 | 2024-09-29 | Online continuous monitoring system for high-concentration carbon dioxide |
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| CN223259693U true CN223259693U (en) | 2025-08-22 |
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