CN115876533A - Gas atmosphere monitoring device at water-cooled wall in power plant boiler - Google Patents
Gas atmosphere monitoring device at water-cooled wall in power plant boiler Download PDFInfo
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- CN115876533A CN115876533A CN202111146225.4A CN202111146225A CN115876533A CN 115876533 A CN115876533 A CN 115876533A CN 202111146225 A CN202111146225 A CN 202111146225A CN 115876533 A CN115876533 A CN 115876533A
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Abstract
The invention relates to a gas atmosphere monitoring device at a water-cooled wall in a power plant boiler. The gas atmosphere monitoring device at the water cooling wall in the power plant boiler comprises a sampling gas path, a sampling probe is arranged on the sampling gas path, and a sampling filter and a condenser are arranged on the sampling gas path and are positioned at the downstream of the sampling probe; the gas detection module is positioned on the sampling pipeline and used for detecting the components of the passing gas; the air pump is used for pumping the gas to be detected into the sampling gas path; the purging gas circuit is connected with the sampling gas circuit to purge the sampling probe. The gas atmosphere monitoring device comprises a sampling gas circuit, a gas detection module, a gas extraction pump, a sampling filter, a condenser and a gas purging module, wherein the sampling gas circuit is connected with the gas extraction pump, the gas extraction pump is used for extracting gas to be detected into the sampling gas circuit, the gas detection module is used for detecting components of the gas to be detected after the gas is processed through the sampling filter and the condenser, and the sampling gas circuit can be purged through the purging gas circuit when the sampling gas circuit is blocked.
Description
Technical Field
The invention relates to a gas atmosphere monitoring device at a water-cooled wall in a power plant boiler.
Background
The gas atmosphere of the water wall in the power plant boiler can be detected to monitor the combustion condition in the power plant boiler, so that the proportion of combustion substances is improved, the combustion rate is further improved, and the generation of harmful substances is reduced. At present, the sampling detection of gas in a power plant boiler mainly depends on manual off-line operation detection, the efficiency is low, the labor amount of workers is large, and the labor cost is high.
Disclosure of Invention
The invention aims to provide a gas atmosphere monitoring device at a water-cooled wall in a power plant boiler, which is used for improving the monitoring efficiency of the gas atmosphere of the water-cooled wall.
The gas atmosphere monitoring device for the water cooling wall in the power plant boiler adopts the following technical scheme:
the power plant boiler inner water wall department gas atmosphere monitoring devices include:
a sampling gas path for the gas to be detected in the boiler to pass through;
the sampling probe is arranged on the sampling gas path and is used for extending into the boiler;
the sampling filter is arranged on the sampling gas path and is positioned at the downstream of the sampling probe and used for filtering the gas passing through;
the condenser is arranged on the sampling gas path and is positioned at the downstream of the sampling probe and used for cooling the passing gas;
the gas detection module is positioned on the sampling pipeline and used for detecting the components of the passing gas;
the air pump is used for pumping the gas to be detected into the sampling gas path;
and the purging gas circuit is connected with the sampling gas circuit so as to purge the sampling probe.
Has the advantages that: according to the gas atmosphere monitoring device for the water cooling wall in the power plant boiler, the gas to be detected is pumped into the sampling gas path through the air pump, the gas is processed through the sampling filter and the condenser, and then the components of the gas to be detected are detected through the gas detection module.
Furthermore, the gas atmosphere monitoring device at the water-cooled wall in the boiler of the power plant comprises a gas return guide circuit which is positioned at the downstream of the air extracting pump and guides the detected gas back. The return air guide path can reduce environmental pollution.
Furthermore, a one-way valve is arranged on the return air guide path. Avoiding gas backflow.
Further, the purge gas path comprises a return-guiding purge branch connected downstream of the one-way valve. The purging of the guide return air path is realized, and the guide return air path is prevented from being blocked.
Furthermore, the purging gas circuit comprises a return guiding purging branch connected with the return guiding gas circuit and a sampling purging branch for purging the sampling probe.
Furthermore, the sampling probe is provided with a sampling channel for gas to enter and a return channel for returning the gas to the boiler, the sampling pipeline is communicated with the sampling channel of the sampling probe, and the return gas guiding channel is communicated with the return channel of the sampling probe.
Further, the sample gas circuit includes first sample branch road, second sample branch road, detection processing gas circuit, and gas detection module is in on the detection processing gas circuit, and first sample branch road and second sample branch road all are in the detection processing gas circuit upper reaches, all are provided with on first sample branch road and the second sample branch road sampling probe is provided with first sample electromagnetism shut-off valve on the first sample branch road, is provided with second sample electromagnetism shut-off valve on the second sample branch road. The first sampling branch and the second sampling branch can sample gas at different positions, and at least two-point sampling is realized.
Furthermore, the purging gas circuit comprises a first probe purging branch connected between the first sampling electromagnetic block valve and the first sampling probe, and a second probe purging branch connected between the second sampling electromagnetic block valve and the second sampling probe. The first probe and the second probe can be swept in time, and the reliability of a sampling gas circuit is further improved.
Furthermore, the purging gas circuit comprises a calibration branch circuit which is connected to the detection processing gas circuit and used for blowing calibration gas into the detection processing gas circuit. The detection module on the detection processing gas circuit is calibrated through the calibration branch, so that the detection accuracy is improved.
Furthermore, a purging filter is arranged on the purging pipeline. The gas blown out from the purging gas circuit is prevented from damaging the sampling gas circuit.
Drawings
FIG. 1 is a schematic structural diagram of a gas atmosphere monitoring device in an embodiment 1 of a device for monitoring gas atmosphere at a water wall in a boiler of a power plant;
in the figure: 1. a sampling filter; 2. a condenser; 3. an oxygen detection module; 4. CO/H 2 S gas detection module; 5. a flow meter; 6. an air pump; 7. a first sampling branch; 8. a second sampling branch; 9. detecting a processing gas circuit; 10. a first sampling probe; 11. a second sampling probe; 12. a first sampling electromagnetic block valve; 13. a second sampling electromagnetic block valve; 14. guiding back to the main path; 15. a first return branch; 16. a second return branch; 17. a first lead-back electromagnetic block valve; 18. a second lead-back electromagnetic block valve; 19. a one-way valve; 20. leading back to the purge branch; 21. a first probe purging branch; 22. a second probe purging branch; 23. calibrating a branch circuit; 24. purging a gas circuit electromagnetic valve; 25. blowing and filteringA machine; 26. a peristaltic pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
The invention relates to a gas atmosphere monitoring device at a water cooling wall in a power plant boiler, which comprises the following specific embodiments:
as shown in figure 1, the gas atmosphere monitoring devices of the water wall in the boiler of the power plant comprises a sampling gas circuit, a sampling probe, a sampling filter 1, a condenser 2, a gas detection module and a communication module for sending detection signals are arranged on the sampling gas circuit, the communication module is connected with a host through a communication line, and in the embodiment, the communication module adopts 485 communication. Wherein sample filter 1 and condenser 2 all set up on the sample gas circuit and be in sampling probe's low reaches, and sample filter 1 is used for filtering the gas that passes through. The condenser 2 is used to cool the passing gas, and the condenser 2 is located downstream of the sampling filter 1. Peristaltic pumps 26 are connected to both the sampling filter 1 and the condenser 2, and the peristaltic pumps 26 are used to discharge water.
A gas detection module is downstream of the sampling filter 1 for detecting the composition of the passing gas. In this embodiment, the gas detection module comprises an oxygen detection module 3 and CO/H 2 S gas detection module 4, oxygen detection module 3 includes oxygen sensor, and oxygen sensor can detect the content of oxygen to can convert the oxygen concentration who measures into digital signal and send to the host computer. CO/H 2 The S gas detection module 4 can monitor CO and H 2 The content of S. CO/H 2 The S gas detection module 4 comprises a CO sensor and an H2S sensor, wherein the CO sensor utilizes the principle that different substances have different absorption frequencies to laser light through a laser measurement technology. H 2 S sensor monitoring H by chemical reaction 2 S concentration and an electrical signal is generated.
Be provided with flowmeter 5 between gas detection module and the condenser 2, flowmeter 5 is the electronic type flowmeter, converts flow information into digital signal, shows on transmitting the host computer through the communication line. The flow meter 5 is used for measuring the flow in the sampling gas path. The tail end of the sampling gas circuit is provided with a suction pump 6, and the suction pump 6 is used for pumping gas to be detected into the sampling gas circuit.
The sample gas circuit includes first sample branch road 7, second sample branch road 8, detection processing gas circuit 9, first sample branch road 7 and second sample branch road 8 all are in detection processing gas circuit 9 upper reaches, first sample branch road 7 is provided with first sampling probe 10, be provided with second sampling probe 11 on the second sample branch road 8, be provided with first sample electromagnetism shut-off valve 12 on the first sample branch road 7, be provided with second sample electromagnetism shut-off valve 13 on the second sample branch road 8. First sampling probe and second sampling probe are in different positions, through setting up sample electromagnetism shut-off valve, can select to use one of them sample branch road work, select the detection to sampling point gas composition as required.
The gas atmosphere monitoring device at the position of the water cooling wall in the boiler of the power plant comprises a purging gas circuit and a gas return circuit for returning detected gas, wherein the purging gas circuit is connected with a sampling gas circuit so as to purge a sampling probe.
The guide return air circuit comprises a guide return main circuit 14 and two guide return branches positioned at the downstream of the guide return main circuit 14, the two guide return branches are respectively a first guide return branch 15 and a second guide return branch 16, the first guide return branch 15 is provided with a first guide return electromagnetic cut-off valve 17, the second guide return branch 16 is provided with a second guide return electromagnetic cut-off valve 18, and the guide return main circuit 14 is also provided with a one-way valve 19.
The sampling probe is provided with a sampling channel for gas to enter and a return channel for returning the gas to the boiler, the sampling pipeline is communicated with the sampling channel of the sampling probe, and the return gas guiding channel is communicated with the return channel of the sampling probe. The first sampling branch 7 is communicated with a sampling channel of a first sampling probe 10, and the second sampling branch 8 is communicated with a sampling channel of a second sampling probe 11.
In the present exemplary embodiment, the first return branch 15 communicates with the return channel of the first sampling probe 10, and the second return branch 16 communicates with the return channel of the second sampling probe 11, the first sampling probe being intended to be arranged at a first sampling point, and the second sampling probe being intended to be arranged at a second sampling point. When the monitoring device works, the on-off states of the first sampling electromagnetic block valve 12 and the first return guide electromagnetic block valve 17 are consistent, so that the gas to be detected taken from the first sampling point returns to the first sampling point through the first return guide branch after the detection is finished. The on-off states of the second sampling electromagnetic block valve 13 and the second return electromagnetic block valve 18 are consistent, so that the gas to be detected taken from the second sampling point returns to the second sampling point through the second return branch after detection is completed. And the mutual interference of the gases at different sampling points is avoided.
The purge circuit comprises a pilot purge branch 20 connected downstream of the non-return valve 19 and a sample purge branch for purging the sample probe. The return-conducting purging branch 20 is used to purge the outlet of the first return-conducting branch 15 and the outlet of the second return-conducting branch 16.
The sampling purging branch is provided with two, one is a first probe purging branch 21 connected between the first sampling electromagnetic block valve 12 and the first sampling probe 10, and the other is a second probe purging branch 22 connected between the second sampling electromagnetic block valve 13 and the second sampling probe 11.
The blowing gas circuit comprises a calibration branch 23 which is connected to the detection processing gas circuit 9 and blows calibration gas into the detection processing gas circuit 9. Through blowing in the calibration gas, can detect the operation conditions of detection module, improve the accurate degree that detects. And each purging branch and each calibration branch are provided with a purging gas path electromagnetic valve 24, and the purging gas path electromagnetic valves 24 can control the on-off of each branch.
The purging gas path is connected with an air compressor and a calibration gas source, in the embodiment, calibration air is adopted as the calibration gas, and a purging filter 25 is arranged on the purging gas path and used for filtering the compressed air and the calibration gas.
The working principle of the gas atmosphere monitoring device at the water cooling wall in the power plant boiler is as follows:
the first sampling probe is at the first sampling point, and the second sampling probe is at the second sampling point. When needing to detect first sampling point, inhale air pump 6 and start, first sample electromagnetism cut-off valve 12 and first leading back electromagnetism cut-off valve 17 start to open, first sampling probe 10 waits to detect gaseous from getting into the sample gas circuit, it filters through detecting the sampling filter 1 on the processing gas circuit 9 to wait to detect gaseous earlier, then carries out dry cooling to gaseous through condenser 2, carries out abundant cooling to high temperature gas in condenser 2, the liquefied vapor, detach moisture, reach dry purpose. Filtered grease and condensed water are removed in time by peristaltic pump 26. The dried gas to be treated passes through a flowmeter 5, an oxygen detection module 3 and CO/H 2 S gas detection module 4 for detecting components and then passing the measurement informationThe signal line is transmitted to the host. Similarly, when the second sampling point needs to be detected, the second sampling electromagnetic cut-off valve 13 and the second return electromagnetic cut-off valve 18 are opened.
The monitoring device can be used for purging after a period of time, so that blockage in the gas circuit is eliminated. When the sampling channel of the first sampling probe 10 needs to be purged, the first sampling electromagnetic block valve 12 is closed, and the first probe purging branch 21 is opened. When the sampling channel of the second sampling probe 11 needs to be purged, the second sampling electromagnetic block valve 13 is closed, and the second probe purging branch 22 is opened. When the return channels of the first sampling probe and the second sampling probe need to be purged, the first return electromagnetic cut-off valve 17 and the second return electromagnetic cut-off valve 18 are opened, and purging is performed through the return purge branch 20.
The specific embodiment 2 of the gas atmosphere monitoring device at the water cooling wall in the power plant boiler is only different from the embodiment in that in the embodiment, the gas to be detected is directly discharged after being purified by the purifying equipment without a gas return path.
The specific embodiment 3 of the gas atmosphere monitoring device for the water cooled wall in the power plant boiler is only different from the previous embodiment in that the purging gas circuit is only used for purging the first sampling probe and the second sampling probe. In other embodiments, only one sampling probe may be provided. In other embodiments, the number of the purging branches may be increased or decreased as needed, for example, only one purging branch is provided, and the first sampling probe and the second sampling probe are purged at the same time.
The specific embodiment 4 of the gas atmosphere monitoring device at the water cooling wall in the power plant boiler is different from the above embodiments only in that the gas detection module is a CO detection module. In other embodiments, the number of sensor types in the gas detection module may be increased or decreased as desired.
The embodiment 5 of the gas atmosphere monitoring device at the water cooling wall in the boiler of the power plant is different from the embodiment only in that the sampling filter is positioned at the downstream of the condenser.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. Water-cooled wall department gas atmosphere monitoring devices in power plant's boiler, its characterized in that includes:
a sampling gas path for the gas to be detected in the boiler to pass through;
the sampling probe is arranged on the sampling gas path and is used for extending into the boiler;
the sampling filter (1) is arranged on the sampling gas path and is positioned at the downstream of the sampling probe and used for filtering the gas passing through;
the condenser (2) is arranged on the sampling gas circuit and is positioned at the downstream of the sampling probe and used for cooling the passing gas;
the gas detection module is positioned on the sampling pipeline and used for detecting the components of the passing gas;
the air pump (6) is used for pumping the gas to be detected into the sampling gas path;
and the purging gas circuit is connected with the sampling gas circuit so as to purge the sampling probe.
2. The power plant boiler water wall gas atmosphere monitoring device according to claim 1, wherein the power plant boiler water wall gas atmosphere monitoring device comprises a gas return path which is arranged downstream of the suction pump (6) and used for returning the detected gas.
3. A plant boiler furnace water wall gas atmosphere monitoring device according to claim 2, characterized in that the return air path is provided with a one-way valve (19).
4. A plant boiler inner water wall gas atmosphere monitoring device according to claim 3, characterized in that the purge gas circuit comprises a lead-back purge branch (20) connected downstream of the non-return valve (19).
5. The device for monitoring the gas atmosphere at the water cooled wall in the power plant boiler according to claim 2, characterized in that the purging gas circuit comprises a return purging branch (20) connected with the return gas circuit and a sampling purging branch for purging the sampling probe.
6. The device for monitoring the gas atmosphere at the water cooling wall in the power plant boiler according to claim 2, wherein the sampling probe is provided with a sampling channel for gas to enter and a return channel for gas to return into the boiler, the sampling pipeline is communicated with the sampling channel of the sampling probe, and the return gas guiding channel is communicated with the return channel of the sampling probe.
7. The power plant boiler water wall gas atmosphere monitoring device according to any one of claims 1-6, characterized in that the sampling gas path comprises a first sampling branch (7), a second sampling branch (8) and a detection processing gas path (9), the gas detection module is located on the detection processing gas path (9), the first sampling branch (7) and the second sampling branch (8) are located at the upstream of the detection processing gas path (9), the sampling probes are arranged on the first sampling branch (7) and the second sampling branch (8), the first sampling branch (7) is provided with a first sampling electromagnetic cut-off valve (12), and the second sampling branch (8) is provided with a second sampling electromagnetic cut-off valve (13).
8. The gas atmosphere monitoring device at the water cooling wall in the power plant boiler is characterized in that the purging gas circuit comprises a first probe purging branch (21) connected between a first sampling electromagnetic block valve (12) and a first sampling probe (10), and further comprises a second probe purging branch (22) connected between a second sampling electromagnetic block valve (13) and a second sampling probe (11).
9. The device for monitoring the gas atmosphere at the water cooled wall in the power plant boiler according to claim 7, characterized in that the purging gas circuit comprises a calibration branch (23) connected to the detection processing gas circuit (9) for blowing calibration gas into the detection processing gas circuit (9).
10. A plant boiler inner water wall gas atmosphere monitoring device according to any one of claims 1-6, characterized in that a purging filter (25) is arranged on the purging gas circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111146225.4A CN115876533A (en) | 2021-09-28 | 2021-09-28 | Gas atmosphere monitoring device at water-cooled wall in power plant boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111146225.4A CN115876533A (en) | 2021-09-28 | 2021-09-28 | Gas atmosphere monitoring device at water-cooled wall in power plant boiler |
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| Publication Number | Publication Date |
|---|---|
| CN115876533A true CN115876533A (en) | 2023-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111146225.4A Pending CN115876533A (en) | 2021-09-28 | 2021-09-28 | Gas atmosphere monitoring device at water-cooled wall in power plant boiler |
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| CN (1) | CN115876533A (en) |
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- 2021-09-28 CN CN202111146225.4A patent/CN115876533A/en active Pending
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