CN215525701U - Single-dilution probe partition synchronous measurement system - Google Patents
Single-dilution probe partition synchronous measurement system Download PDFInfo
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- CN215525701U CN215525701U CN202121330421.2U CN202121330421U CN215525701U CN 215525701 U CN215525701 U CN 215525701U CN 202121330421 U CN202121330421 U CN 202121330421U CN 215525701 U CN215525701 U CN 215525701U
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Abstract
The utility model discloses a partitioned synchronous measurement system for a single dilution probe, which comprises an air extraction dilution module, a mixed jet pump, a heat tracing pipe, a plurality of filtering devices, an air storage device and an air suction jet pump, wherein the air extraction dilution module is connected with the mixed jet pump; the filtering devices are arranged in each subarea in the flue, the gas storage device is tightly attached to the outer wall of the flue, and the filtering devices are communicated with the gas storage device through pipelines; the air-extracting dilution module is communicated with each air storage device through a heat tracing pipe and an air-sucking pipeline, and the air-sucking jet pump is communicated with the air storage devices through an air suction pipe of the jet pump; the air suction pipe of the mixed jet pump is communicated with the pipeline between the heat tracing pipe and the air extracting and diluting module. According to the utility model, the inside of the flue is divided into zones, and each zone is provided with the filtering device for gas taking, so that the synchronous measurement of the pollutant concentration of a plurality of flue zones is completed, the pollutant concentration in the flue can be truly reflected, the true and reliable data can be provided for a power plant control system, the mixed measurement function of each zone can be carried out, and the reliability of the data is improved.
Description
Technical Field
The utility model particularly relates to a single dilution probe partition synchronous measurement system.
Background
In the process of producing energy in the industry of electric energy, a large boiler is one of indispensable devices. With the increase of environmental requirements, the monitoring of environmental indexes of boilers and auxiliary equipment thereof is more and more emphasized, a flue gas online monitoring system (CEMS) is a mainstream device at present, but due to the problems of large flue size, non-uniform flow field and the like, a single-point CEMS sampling probe measuring point is not representative, and a measured value cannot truly reflect the level of pollutants in a flue. A partition measuring system in the market mostly adopts partition round measurement, measures the numerical value of each partition in turn, and then takes the measured data as the concentration data of the whole flue interface to guide ammonia spraying. However, with the change of the load of the power plant, the concentration of pollutants in the flue fluctuates, the numerical value change of each partition is large, the real data of the section of the flue cannot be truly reflected by measuring data in turn, the distorted data can bring errors to ammonia injection control, the problems of excessive ammonia injection or insufficient ammonia injection and the like can be caused, and only when the pollutant data of the same section of the flue is measured at the same moment, the pollutant data of the same section of the flue has significance, and the ammonia injection is controlled correctly and reasonably.
The existing system has the following problems:
1. the concentration of the measured data at the same moment cannot be reflected by the sectional measurement;
2. the number of the dilution probes is large, the cost is high, and errors are easily generated by different measurement probes;
3. there is no mixing measurement function.
The present invention has been made to solve these problems.
Disclosure of Invention
The utility model aims to provide a partition synchronous measurement system for a single dilution probe.
The purpose of the utility model is realized by the following technical scheme:
a single dilution probe partition synchronous measurement system comprises an air extraction dilution module, a mixed jet pump, a heat tracing pipe, a plurality of filtering devices, an air storage device and an air suction jet pump; the filtering devices are arranged in each subarea in the flue, the gas storage device is tightly attached to the outer wall of the flue, and the filtering devices are communicated with the gas storage device through pipelines; the air extracting and diluting module is communicated with each air storage device through a heat tracing pipe and a pipeline, and the air absorbing jet pump is communicated with the air storage devices through an air suction pipe of the jet pump; the air suction pipe of the mixed jet pump is communicated with the pipeline between the heat tracing pipe and the air extracting and diluting module.
Furthermore, a high-temperature electromagnetic valve is arranged on a pipeline between the heat tracing pipe and the gas storage device.
Furthermore, the gas storage device is also provided with a purging pipe, and the purging pipe is connected with a purging electromagnetic valve.
Further, the air exhaust dilution module is connected with the analyzer through a pipeline.
Furthermore, the air suction jet pump is also connected with a jet pump air inlet pipe, and an air inlet electromagnetic valve is arranged on the jet pump air inlet pipe.
Further, the air suction jet pump is also connected with a jet pump air outlet pipe, and the jet pump air outlet pipe is communicated with the inside of the flue; and the air outlet of the air outlet pipe of the jet pump, which is positioned in the flue, and the air outlet and the filtering device are positioned on the same section.
Furthermore, a mixing electromagnetic valve is arranged on an air suction pipe of the mixing jet pump.
Preferably, the other end of the mixed jet pump is communicated with the inside of the flue.
Preferably, the air suction pipeline extending into the air storage device extends into the central position of the air storage device.
Preferably, the bottom of the gas storage device is conical, the purging gas outlet pipe is positioned at the conical bottom, and the purging gas outlet pipe is connected with a purging gas outlet valve.
The beneficial technical effects are as follows:
according to the utility model, the inside of the flue is divided into zones, each zone is provided with a filtering device for gas taking, the synchronous measurement of the pollutant concentration of a plurality of flue zones is completed, the measured data of each zone has high comparability, the pollutant concentration in the flue can be truly reflected, true and reliable data are provided for a power plant control system, the mixed measurement function of each zone can be carried out, and the reliability of the data is improved.
Drawings
The utility model will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of a single-probe partitioned synchronous measurement system of the present invention.
FIG. 2 is a schematic view showing the piping connection of the gas storage device of the present invention.
In the figure: 1-a filtration device; 2-gas storage means; 3-purging the tube; 4-purging the electromagnetic valve; 5-high temperature electromagnetic valve; 6-heat tracing pipe; 7-air extraction dilution module; 8-an analyzer; 9-a hybrid jet pump; 10-air inlet solenoid valve; 11-jet pump air inlet pipe; 12-an air-breathing jet pump; 13-jet pump air outlet pipe; 14-jet pump suction pipe; 15-flue; 16-purge gas outlet valve; 17-purging an air outlet pipe; 18-mixing solenoid valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a single-probe partitioned synchronous measurement system comprises an air-extracting dilution module 7, a mixed jet pump 9, a heat tracing pipe 6, a plurality of filtering devices 1, an air storage device 2 and an air-sucking jet pump 12; the filtering device 1 is arranged in each subarea in the flue 15, the gas storage device 2 is tightly attached to the outer wall of the flue 15, and the filtering device 1 is communicated with the gas storage device 2 through a pipeline; the air extracting and diluting module 7 is communicated with each air storage device 2 through a heat tracing pipe 6 and an air suction pipeline, and the air suction jet pump 12 is communicated with the air storage devices 2 through an air suction pipe 14 of the jet pump; an air suction pipe of the mixed jet pump 9 is communicated with a pipeline between the heat tracing pipe 6 and the air extracting and diluting module 7; the gas storage device 2 is also provided with a purging pipe 3, and the purging pipe 3 is connected with a purging electromagnetic valve 4; a high-temperature electromagnetic valve 5 is arranged on the air suction pipeline between the heat tracing pipe 6 and the air storage device 2; the air suction jet pump 12 is also connected with a jet pump air outlet pipe 13, the jet pump air outlet pipe 13 is communicated with the inside of the flue 15, and an air outlet of the jet pump air outlet pipe 13 positioned in the flue 15 and the filtering device 1 are positioned on the same cross section; the air suction jet pump 12 is also connected with a jet pump air inlet pipe 11, and an air inlet electromagnetic valve 10 is arranged on the jet pump air inlet pipe 11; a mixing electromagnetic valve 18 is arranged on an air suction pipe of the mixing jet pump 9; the other end of the mixed jet pump 9 is communicated with the inside of the flue 15; the air exhaust dilution module 7 is connected with an analyzer 8 through a pipeline.
When the device is used, each subarea of the flue is pumped by the air suction jet pump 12, the extracted flue gas is filtered by the filtering device 1, and the extracted gas is stored in the gas storage device 2.
During air suction, the air inlet electromagnetic valve 10 is opened, compressed air enters the air suction jet pump 12 through the jet pump air inlet pipe 11, negative pressure generated by the air suction jet pump 12 is lower than the pressure inside the flue 15, and smoke is sucked into the air storage device 2 through the filtering device 1. After the gas in the gas storage device 2 is replaced, the gas inlet electromagnetic valve 10 is closed, and the gas suction process is stopped; at this moment, the filtering device 1 and the jet pump air outlet pipe 13 are both positioned on the same section inside the flue 15, the two are positioned under the same environmental pressure, and according to the principle of a communicating vessel, gas flow cannot occur at this moment, namely, the flue gas inside the gas storage device 2 is kept inside and cannot flow into the flue 15.
After the air suction process is finished, the high-temperature electromagnetic valves 5 of the branches are opened in sequence to finish the sampling and measuring process of the smoke in each subarea. The air extracting and diluting module 7 is connected with the air storage device 2 through the heat tracing pipe 6, so that the heat tracing temperature is about 135 ℃, and the steam in the flue gas is prevented from being condensed to influence the operation of the equipment. The air exhaust dilution module 7 adopts a Venturi device to generate negative pressure, air exhaust flow is limited through a sound velocity small hole structure, air exhaust amount is far smaller than air storage amount of the air storage device 2, and when gas in the air exhaust air storage device 2 is measured, large disturbance cannot be generated.
Stretch into the gas storage device 2 inside pipeline of breathing in and stretch into the central point of gas storage device 2 and put, guarantee that in the whole measurement process, the gas that dilutes the module 7 extraction of bleeding is the gas of 2 inside storages of gas storage device, and not the flue gas that newly gets into because of the disturbance.
When the mixed measurement is needed, the high-temperature electromagnetic valves 5 of all the subarea pipelines are opened, the mixing electromagnetic valves 18 are also opened, the gas of all the subarea pipelines is extracted through the mixing jet pump 9, the mixing process is accelerated, and the mixed gas is extracted by the air extraction dilution module 7 and sent to the analyzer 8 for measurement. In order to ensure that all branches are uniformly mixed, the lengths of the branch pipelines of the subareas are designed to be the same, and the resistance of the branch pipelines is designed to be the same.
Referring to fig. 2, the bottom of the gas storage device 2 is conical, the purge outlet pipe 17 is located at the conical bottom, and the purge outlet pipe 17 is connected with a purge outlet valve 16, so that the purging process can be conveniently carried out, and dust can be completely purged. The purging air outlet pipe 17 is connected with the inside of the flue, and outside air is pumped into the air storage device 2 by utilizing the pressure difference between the inside and the outside of the flue to complete the purging process.
The gas storage device 2 is tightly attached to the outer wall of the flue 15 for installation, the heat of the flue is used for heating, the heat preservation of the flue is used for heat preservation, and the heating and heat preservation cost is saved. In order to ensure the long-term stable operation of the equipment, the gas storage device 2 is provided with the purging pipe 3 and the purging gas outlet pipe 17, and when purging is needed, the purging control valve 4 and the purging gas outlet valve 16 are opened to complete the purging process.
The single dilution probe partition synchronous measurement system can realize that one dilution probe completes the measurement function of each partition section of the flue, thereby greatly reducing the measurement error of the system; meanwhile, the gas storage device based on the principle of the communicating vessel is designed, so that the synchronism measurement of each partition is realized, the authenticity and the reliability of the measured data are ensured, and the construction cost and the hardware cost are reduced.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A single dilution probe zoning synchronous measurement system is characterized by comprising an air extraction dilution module (7), a mixed jet pump (9), a heat tracing pipe (6), a plurality of filtering devices (1), an air storage device (2) and an air suction jet pump (12); the filtering device (1) is arranged in each subarea in the flue (15), the gas storage device (2) is tightly attached to the outer wall of the flue (15), and the filtering device (1) is communicated with the gas storage device (2) through a pipeline; the air extracting and diluting module (7) is communicated with each air storage device (2) through a heat tracing pipe (6) and an air suction pipeline, and the air suction jet pump (12) is communicated with the air storage devices (2) through an air suction pipe (14) of the jet pump; an air suction pipe of the mixed jet pump (9) is communicated with a pipeline between the heat tracing pipe (6) and the air extracting and diluting module (7).
2. The zonal synchronous measurement system of the single dilution probe according to claim 1, wherein a high temperature electromagnetic valve (5) is arranged on the air suction pipeline between the heat tracing pipe (6) and the air storage device (2).
3. The zonal synchronous measurement system of the single dilution probe according to claim 2, wherein the gas storage device (2) is further provided with a purging pipe (3), and a purging electromagnetic valve (4) is connected to the purging pipe (3).
4. The zonal synchronous measurement system of a single dilution probe according to claim 1, wherein the bleed dilution module (7) is connected with the analyzer (8) through a pipeline.
5. The zonal synchronous measurement system of the single dilution probe according to claim 1, wherein the air suction jet pump (12) is further connected with a jet pump air inlet pipe (11), and an air inlet electromagnetic valve (10) is arranged on the jet pump air inlet pipe (11).
6. The zoning synchronous measurement system of the single dilution probe according to claim 1, wherein the air suction jet pump (12) is further connected with a jet pump air outlet pipe (13), and the jet pump air outlet pipe (13) is communicated with the inside of the flue (15); and the air outlet of the air outlet pipe (13) of the jet pump, which is positioned in the flue (15), is positioned on the same section with the filtering device (1).
7. The zonal synchronization measurement system of a single dilution probe according to claim 1, wherein a mixing solenoid valve (18) is provided on an air suction pipe of the mixing jet pump (9).
8. The zonal synchronization measurement system of the single dilution probe according to claim 1, wherein the other end of the mixing jet pump (9) is communicated with the inside of the flue (15).
9. The zonal synchronous measurement system of the single dilution probe according to claim 1, wherein the air suction pipeline extending into the air storage device (2) extends into the center of the air storage device (2).
10. The partitioned synchronous measurement system of the single dilution probe according to claim 7, wherein the bottom of the gas storage device (2) is conical, the purge gas outlet pipe (17) is located at the bottom of the cone, and the purge gas outlet pipe (17) is connected with a purge gas outlet valve (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121330421.2U CN215525701U (en) | 2021-06-16 | 2021-06-16 | Single-dilution probe partition synchronous measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121330421.2U CN215525701U (en) | 2021-06-16 | 2021-06-16 | Single-dilution probe partition synchronous measurement system |
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| Publication Number | Publication Date |
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| CN215525701U true CN215525701U (en) | 2022-01-14 |
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| CN202121330421.2U Expired - Fee Related CN215525701U (en) | 2021-06-16 | 2021-06-16 | Single-dilution probe partition synchronous measurement system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115248242A (en) * | 2022-06-23 | 2022-10-28 | 大唐环境产业集团股份有限公司 | Rapid flue gas NOx measuring equipment based on electrochemical method |
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2021
- 2021-06-16 CN CN202121330421.2U patent/CN215525701U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115248242A (en) * | 2022-06-23 | 2022-10-28 | 大唐环境产业集团股份有限公司 | Rapid flue gas NOx measuring equipment based on electrochemical method |
| CN115248242B (en) * | 2022-06-23 | 2024-05-28 | 大唐环境产业集团股份有限公司 | Flue gas NOx rapid measurement equipment based on electrochemical method |
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Granted publication date: 20220114 |