CN215728057U - On-line measuring device for gas composition in boiler - Google Patents
On-line measuring device for gas composition in boiler Download PDFInfo
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- CN215728057U CN215728057U CN202122346189.8U CN202122346189U CN215728057U CN 215728057 U CN215728057 U CN 215728057U CN 202122346189 U CN202122346189 U CN 202122346189U CN 215728057 U CN215728057 U CN 215728057U
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Abstract
The utility model relates to an online measuring device for gas components in a boiler, which comprises a gas component analyzer (1), a controller (2), an air extractor (3) and at least two groups of sampling devices (4), wherein each group of sampling devices (4) comprises a filter (4.1) communicated with a boiler hearth, the filter (4.1) is communicated with a gas inlet of the gas component analyzer (1) through a pipeline connected with a sampling electromagnetic valve (4.2) in series, a gas outlet of the gas component analyzer (1) is connected with an inlet pipe of the air extractor (3), and the sampling electromagnetic valve (4.2) is electrically connected with the controller (2) and is controlled by the controller (2). The utility model realizes the measuring device for carrying out gas component on-line detection on a plurality of positions in the boiler furnace by utilizing one gas component analysis device, and has the advantages of reliable measurement, low detection cost and good real-time property.
Description
Technical Field
The utility model relates to the technical field of online detection of gas components, in particular to an online measuring device for gas components generated by combustion in a boiler, and particularly relates to an online measuring device for gas components in the boiler.
Background
In the power plant, in order to realize low NOx combustion in a combustor area, a low-nitrogen combustion control technology is adopted, and under the condition of combustion, although the generation of NOx can be inhibited, the combustor area is deep and anoxic, and the concentration of H2S and CO is increased sharply, so that the conditions of insufficient combustion in a hearth, high-temperature corrosion of a water wall, slag bonding and the like can be caused. The combustion state in the hearth can be directly reflected by monitoring the H2S and CO concentration, the gas component concentration in the hearth can be provided for a power plant in real time, air distribution adjustment is carried out on the basis, combustion optimization is facilitated, and hearth slagging and corrosion are avoided.
H2S, CO concentration on-line measuring equipment generally are more expensive, and the furnace area is great, and the position that needs to detect is also more, if each position all installs gaseous composition on-line measuring device additional, can increase a large amount of equipment investment. Therefore, a technology and a product capable of simultaneously detecting the concentrations of gases such as H2S, CO, etc. at a plurality of positions in the boiler on line by using one set of instrument are urgently needed to meet the requirement of on-line detection of gas components in the boiler.
SUMMERY OF THE UTILITY MODEL
Aiming at the existing requirements, the utility model provides the online measuring device for the gas components in the boiler, which can realize the online detection of the gas components at a plurality of positions in the boiler hearth simultaneously through multipoint alternative sampling by utilizing a set of online measuring device for the gas components of H2S and CO.
The utility model is realized by the following technical scheme, and provides an online measuring device for gas components in a boiler, which comprises a gas component analyzer, a controller, an air pump and at least two groups of sampling devices, wherein each group of sampling devices comprises a filter communicated with a boiler hearth, the filter is communicated with a gas inlet of the gas component analyzer through a pipeline connected with a sampling electromagnetic valve in series, a gas outlet of the gas component analyzer is connected with an inlet pipe of the air pump in a connecting way, and the sampling electromagnetic valve is electrically connected with the controller and is controlled by the controller.
After the scheme is adopted, the gas in the boiler furnace can be respectively extracted from different positions in the boiler furnace by the filter at different time nodes through the controller in a mode of controlling the sampling electromagnetic valve, and the gas component analysis is carried out by the gas component analyzer.
Preferably, the device also comprises a sampling device purging device, the purging device is respectively communicated with the filter sampling pipeline at the front end of each group of sampling electromagnetic valves through a purging electromagnetic valve connected in series with the pipeline, and the purging electromagnetic valves are electrically connected with the controller and controlled by the controller.
Preferably, the purging device is a compressed air source. By adopting the preferable scheme, the filter without the sampling point can be purged by using the purging device in the process of sampling in turns, so that the problem of inaccurate detection caused by gas residue in the previous measurement in the sampling process is solved.
Preferably, the gas composition analyzer comprises an H2S sensor or/and a CO sensor. The preferred scheme can simultaneously detect, analyze and measure the components of the H2S gas and the CO gas in the boiler furnace.
Preferably, the controller is a PLC controller.
In conclusion, the utility model designs the measuring device which can realize the on-line detection of the gas components at a plurality of positions in the boiler furnace by using one gas component analyzing device, and has the advantages of reliable measurement, low detection cost and good real-time property.
Drawings
FIG. 1 is a schematic view of the overall structure of an on-line measuring device for the gas composition in a boiler according to the present invention;
shown in the figure:
1. gas composition analysis appearance, 2, controller, 3, air extractor, 4, sampling device, 4.1, filter, 4.2, sampling solenoid valve, 5, purge device, 6, purge solenoid valve.
Detailed Description
In order to clearly illustrate the technical features of the present invention, the present invention is further illustrated by the following detailed description with reference to the accompanying drawings.
As shown in figure 1, an on-line measuring device for gas components in a boiler is provided, which comprises a gas component analyzer 1, and further comprises a controller 2, an air extractor 3 and two groups of sampling devices 4, wherein each group of sampling devices 4 comprises a filter 4.1 communicated with a boiler hearth, the filter 4.1 is communicated with a gas inlet of the gas component analyzer 1 through a pipeline connected with a sampling electromagnetic valve 4.2 in series, a gas outlet of the gas component analyzer 1 is connected with an inlet pipe of the air extractor 3 in a connecting mode, and the sampling electromagnetic valve 4.2 is electrically connected with the controller 2 and is controlled by the controller 2.
In this embodiment, the device further comprises a sampling device purging device 5, the purging device 5 is respectively communicated with the sampling pipeline of the filter 4.1 at the front end of each group of sampling electromagnetic valves 4.2 through a purging electromagnetic valve 6 connected in series with the pipeline, the purging electromagnetic valve 6 is electrically connected with the controller 2 and is controlled by the controller 2, the purging device 5 is a compressed air source, the gas component analyzer 1 comprises an H2S sensor and a CO sensor, and the controller 2 is a PLC controller.
In this embodiment, two groups of sampling devices 4 are provided, and during operation, the sampling electromagnetic valve corresponding to the group of sampling devices 4 in which sampling is performed is opened, while the sampling electromagnetic valve 4.2 corresponding to the other group of sampling devices 4 in which sampling is not performed is closed, the purge electromagnetic valve 6 corresponding to the group in which sampling is performed is closed, and the purge electromagnetic valve 6 corresponding to the group in which sampling is not performed is opened, so that when one group of sampling devices 4 in which sampling is performed, the other group of sampling devices 4 performs purge operation by using the purge device 5.
In the working process of the embodiment, when one air-powder pipeline is used for sampling, the corresponding sampling head electromagnetic valve 3.2 and cyclone sampler electromagnetic valve 3.4 in the group are in an open state, the corresponding sampling head electromagnetic valve 3.2 and cyclone sampler electromagnetic valve 3.4 in the other air-powder pipeline are in a closed state, otherwise, the sampling process is opposite, the fan 4 is in an open state to form a suction force, so that the air-powder mixture in the air-powder pipeline is sucked into the sampling head 3.1 and cyclone sampler 3.3, the coal powder is separated from the air-powder mixture in the cyclone sampler 3.3 under the action of centrifugal force and gravity, falls into the lower part, falls into the fineness measurement instrument 1 through the cyclone sampler electromagnetic valve 3.4 to perform online fineness measurement, outputs a fineness value, and the coal powder after fineness analysis falls into the pipeline at the inlet of the fan 4 and is blown into the air-powder pipeline by the fan 4, the sampling process is the same as that of the other wind powder pipeline when sampling is carried out.
Finally, it should be further noted that the above examples and descriptions are not limited to the above embodiments, and technical features of the present invention that are not described may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.
Claims (5)
1. The utility model provides an online measuring device of gas composition in boiler, includes gas composition analysis appearance (1), its characterized in that still includes controller (2), air extractor (3) and at least two sets of sampling device (4), every group sampling device (4) include filter (4.1) with boiler furnace intercommunication, filter (4.1) through the pipeline that has concatenated sampling solenoid valve (4.2) and the air inlet intercommunication of gas composition analysis appearance (1), the gas outlet of gas composition analysis appearance (1) in the inlet pipe connector of air extractor (3), sampling solenoid valve (4.2) be connected and receive the control of controller (2) with controller (2) electricity.
2. The on-line gas composition measuring device in the boiler as claimed in claim 1, further comprising a sampling device purging device (5), wherein the purging device (5) is respectively communicated with the sampling pipeline of the filter (4.1) at the front end of each group of sampling solenoid valves (4.2) through a purging solenoid valve (6) connected in series with the pipeline, and the purging solenoid valve (6) is electrically connected with the controller (2) and controlled by the controller (2).
3. The on-line measuring device for gas composition in boiler according to claim 2, characterized in that said purging device (5) is a compressed air source.
4. An on-line measuring device for gas composition in boiler according to any of claims 1 to 3, characterized in that said gas composition analyzer (1) comprises H2S sensor or/and CO sensor.
5. The on-line measuring device for gas composition in boiler according to claim 1, characterized in that said controller (2) is a PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122346189.8U CN215728057U (en) | 2021-09-27 | 2021-09-27 | On-line measuring device for gas composition in boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122346189.8U CN215728057U (en) | 2021-09-27 | 2021-09-27 | On-line measuring device for gas composition in boiler |
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| Publication Number | Publication Date |
|---|---|
| CN215728057U true CN215728057U (en) | 2022-02-01 |
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| CN202122346189.8U Active CN215728057U (en) | 2021-09-27 | 2021-09-27 | On-line measuring device for gas composition in boiler |
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| CN (1) | CN215728057U (en) |
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2021
- 2021-09-27 CN CN202122346189.8U patent/CN215728057U/en active Active
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