CN218121529U - Online real-time measuring device of flue rate of leaking out - Google Patents
Online real-time measuring device of flue rate of leaking out Download PDFInfo
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- CN218121529U CN218121529U CN202221923895.2U CN202221923895U CN218121529U CN 218121529 U CN218121529 U CN 218121529U CN 202221923895 U CN202221923895 U CN 202221923895U CN 218121529 U CN218121529 U CN 218121529U
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- oxygen
- sampling
- flue
- sampling device
- air preheater
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The utility model discloses an online real-time measuring device for the air leakage rate of a flue, which comprises a flue gas pipeline, wherein an air preheater, an electric dust remover and an induced draft fan are sequentially arranged in the flue gas pipeline; a first oxygen sampling device is installed at the inlet of the air preheater, a second oxygen sampling device is installed at the outlet of the air preheater, and a third oxygen sampling device is also installed at the inlet of the induced draft fan; the first oxygen volume sampling device, the second oxygen volume sampling device and the third oxygen volume sampling device are all connected with the measuring module. The utility model discloses a same time quantum carries out multiposition multiple spot sample detection oxygen content and comes on-line computation and show flue condition of leaking out for the error is little, the real-time is good, the representativeness is good and there is not the possibility of misleading in the analysis investigation result.
Description
Technical Field
The utility model relates to a flue gas pipeline technical field, concretely relates to online real-time measurement device of flue rate of leaking out.
Background
The tail flue of the thermal power plant from the outlet of the hearth to the inlet of the induced draft fan belongs to a negative pressure region, and hidden troubles of internal air leakage exist, according to the analysis of the actual operation condition of the tail flue of the boiler on site, flue air leakage is easily caused from the air preheater and the outlet of the air preheater to the inlet flue of the induced draft fan, and the air leakage of the air preheater not only causes the reduction of the heat exchange efficiency of the air preheater, but also causes the increase of the flue gas flow, the reduction of the dust remover efficiency and the increase of the power consumption of the induced draft fan; the air preheater export also very easily takes place the flue and leaks out to draught fan entry flue, leads to draught fan power consumption to increase and draught fan to rob the wind stall potential safety hazard.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can discern the condition of leaking out of flue gas pipeline, can help the online real-time measuring device of the flue rate of leaking out of analysis investigation.
An online real-time measuring device for the air leakage rate of a flue comprises a flue gas pipeline, wherein an air preheater, an electric dust remover and an induced draft fan are sequentially arranged in the flue gas pipeline;
a first oxygen sampling device is installed at the inlet of the air preheater, a second oxygen sampling device is installed at the outlet of the air preheater, and a third oxygen sampling device is also installed at the inlet of the induced draft fan;
the first oxygen sampling device, the second oxygen sampling device and the third oxygen sampling device are all connected with the measuring module.
Optionally, the air preheater inlet to the air preheater outlet is communicated with a first sampling main pipe, and the first oxygen sampling device is installed on the first sampling main pipe.
Optionally, the air preheater export extremely the electrostatic precipitator export intercommunication has the female pipe of second sample, the appearance device is installed to second oxygen volume on the female pipe of second sample.
Optionally, the distance the position of draught fan upper reaches first distance is to the distance the intercommunication has the female pipe of third between the position of draught fan upper reaches second distance, the appearance device is installed to third volume sample on the female pipe of third sample, first distance is greater than the second distance.
Optionally, the first oxygen volume sampling device, the second oxygen volume sampling device and the third oxygen volume sampling device are identical in structure and comprise a sampling sub-pipe and a sampling main pipe, the sampling sub-pipe forms a group of sampling sub-pipes, one end of each group of sampling sub-pipes extends into a plurality of positions in a flue gas pipeline, the other end of each sampling sub-pipe is communicated with the sampling main pipe, and the sampling main pipe is communicated with the first sampling main pipe, the second sampling main pipe or the third sampling main pipe.
Optionally, the sampling header pipes are all provided with purging devices.
Optionally, the first distance is 4 meters and the second distance is 0.5 meters.
Optionally, the first oxygen sampling device is arranged at a position 2-4 meters away from the inlet of the air preheater.
Optionally, the second oxygen sampling device is arranged at a position 2-4 meters away from the outlet of the air preheater.
Optionally, an inlet of the flue gas pipeline is provided with a hearth, and an outlet of the flue gas pipeline is sequentially provided with a desulfurizing tower and a chimney.
The method and the device have the advantages that the multi-position multi-point sampling and oxygen content detection are carried out in the same time period to calculate and display the air leakage condition of the flue on line, so that the error is small, the real-time performance is good, the representativeness is good, and the possibility of misleading of analysis and investigation results does not exist.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic structural diagram of an online real-time flue air leakage rate measuring device of the present disclosure;
FIG. 2 is a control schematic diagram of an online real-time measurement device of the flue air leakage rate of the present disclosure;
FIG. 3 is a schematic diagram of the structure at the location of the sampling sub-pipe and the sampling main pipe in the flue leak rate of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the online real-time measurement device for the air leakage rate of the flue comprises a flue gas pipeline 1, wherein an air preheater 2, an electric dust remover 3 and an induced draft fan 4 are sequentially arranged in the flue gas pipeline 1; the air preheater 2 is used for preheating air, the electric dust remover 3 is used for removing dust from flue gas, and the induced draft fan 4 is used for providing power for flue gas flow. The inlet of the flue gas pipeline 7 can be provided with a hearth 13, and the outlet of the flue gas pipeline 1 can be sequentially provided with a desulfurizing tower 14 and a chimney 15.
A first oxygen sampling device 5 is installed at the inlet of the air preheater 2, a second oxygen sampling device 6 is installed at the outlet of the air preheater 2, and a third oxygen sampling device 7 is also installed at the inlet of the induced draft fan 4; the first oxygen sampling device 5, the second oxygen sampling device 6 and the third oxygen sampling device 7 are all used for identifying the oxygen content in the smoke.
The first oxygen sampling device 5, the second oxygen sampling device 6 and the third oxygen sampling device 7 are all connected with the measuring module 8. The measuring module 8 is used for calculating the air leakage rate according to the oxygen content measured at a plurality of positions; the measuring module can be a single chip microcomputer, a central processing unit, a network processor, a digital signal processor or an application specific integrated circuit and the like, and the structure of the measuring module is the prior art.
The method for calculating the air leakage rate through the oxygen content specifically comprises the following steps:
air leakage rate (%) of air preheater (air preheater outlet oxygen amount O) 2 Inlet oxygen amount O of air preheater 2 ) /(21-air preheater exit oxygen O) 2 )*90；
Air leakage rate (%) from the outlet of the air preheater to the inlet flue of the induced draft fan (induced draft fan inlet oxygen O) 2 -air preheater exit oxygen amount O 2 ) /(21-inlet oxygen amount O of induced draft fan) 2 )*90。
In an embodiment, a plurality of the first oxygen sampling devices 5, the second oxygen sampling devices 6 and the third oxygen sampling devices 7 are arranged, and the plurality of the first oxygen sampling devices 5 are uniformly distributed on the side wall of the flue gas pipeline 1 at the inlet position of the air preheater 2; the second oxygen sampling devices 6 are uniformly distributed on the side wall of the flue gas pipeline 1 at the outlet position of the air preheater 2; a plurality of third oxygen volume sampling device 7 evenly distributed be in the flue gas pipeline 7 lateral wall of draught fan 2 entry position. A plurality of sampling devices 6 are provided for a more accurate determination of the oxygen content.
In an embodiment, the inlet of the air preheater 2 is communicated with the outlet of the air preheater 2 to form a first sampling main pipe 9, the first oxygen sampling device 5 is installed on the first sampling main pipe 9, and the first oxygen sampling device 5 is arranged at a position 2 meters away from the inlet of the air preheater. 2 exports of air preheater extremely 3 exports the intercommunication of electrostatic precipitator has the female pipe 10 of second sample, the second oxygen volume is got appearance device 6 and is installed on the female pipe 10 of second sample, the second oxygen volume is got appearance device 6 and is set up at the distance 2 meters positions in air preheater export. An online zirconia meter is arranged in the mother pipe and used for measuring the oxygen content.
The distance the position of the first distance in draught fan 4 upper reaches is to the distance it has the female pipe of third 11 to communicate between the position of the second distance in draught fan 4 upper reaches, the appearance device 7 is installed to third oxygen volume on the female pipe of third sample 11, first distance is greater than the second distance. For example, the first distance is 4 meters and the second distance is 0.5 meters; the first distance and the second distance may also be set to other distances.
Referring to fig. 3, in another embodiment, the first oxygen sampling device 5, the second oxygen sampling device 6, and the third oxygen sampling device 7 have the same structure, and each of the first oxygen sampling device, the second oxygen sampling device, and the third oxygen sampling device 7 includes a sampling sub-pipe 51 and a sampling main pipe 52, the sampling sub-pipes 51 form a group of sampling sub-pipes, one end of each group of sampling sub-pipes 51 extends into multiple positions in the flue gas pipeline 1, the other end of each sampling sub-pipe 51 is communicated with the sampling main pipe 52, the sampling main pipe 52 is communicated with the first sampling main pipe 9, the second sampling main pipe 10, or the third sampling main pipe 11, and the flue gas at multiple positions in the flue gas pipeline 1 can be collected through multiple groups of sampling sub-pipes 51, collected after entering the sampling main pipe 52, and then detected in the main pipe.
The sampling manifolds 52 are each provided with a purging device 16. Regularly sweep the mediation to the flue gas sampling tube, ensure that the flue gas sampling tube operates normally
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. The utility model provides an online real-time measuring device of flue rate of leaking out which characterized in that: the device comprises a flue gas pipeline, wherein an air preheater, an electric dust remover and an induced draft fan are sequentially arranged in the flue gas pipeline;
a first oxygen sampling device is installed at the inlet of the air preheater, a second oxygen sampling device is installed at the outlet of the air preheater, and a third oxygen sampling device is also installed at the inlet of the induced draft fan;
the first oxygen sampling device, the second oxygen sampling device and the third oxygen sampling device are all connected with the measuring module.
2. The on-line real-time measurement device for the air leakage rate of the flue of claim 1, characterized in that: the air preheater entry extremely air preheater export intercommunication has the female pipe of first sample, a oxygen volume is got a kind device and is installed on the female pipe of first sample.
3. The online real-time measurement device for the air leakage rate of the flue of claim 2, characterized in that: the air preheater export extremely the electrostatic precipitator export intercommunication has the female pipe of second sample, the second oxygen volume is got appearance device and is installed on the female pipe of second sample.
4. The online real-time measurement device of the air leakage rate of the flue of claim 3, characterized in that: the distance draught fan upper reaches the position of first distance to the distance the intercommunication has the female pipe of third between the position of draught fan upper reaches second distance, the third oxygen volume is got a kind the device and is installed on the female pipe of third sample, first distance is greater than the second distance.
5. The online real-time measurement device of the air leakage rate of the flue of claim 4, characterized in that: the first oxygen quantity sampling device, the second oxygen quantity sampling device and the third oxygen quantity sampling device are identical in structure and comprise a sampling pipe sub pipe and a sampling main pipe, the sampling sub pipes form a group of sampling sub pipes, one end of each group of sampling sub pipes extends into a plurality of positions in a flue gas pipeline, the other end of each sampling sub pipe is communicated with the sampling main pipe, and the sampling main pipe is communicated with the first sampling main pipe, the second sampling main pipe or the third sampling main pipe.
6. The online real-time measurement device of the air leakage rate of the flue of claim 5, characterized in that: and the sampling main pipe is provided with a purging device.
7. The online real-time measurement device of the air leakage rate of the flue of claim 5, characterized in that: the first distance is 4 meters and the second distance is 0.5 meters.
8. The on-line real-time measurement device for the air leakage rate of the flue of claim 1, characterized in that: the first oxygen sampling device is arranged at a position 2-4 meters away from the inlet of the air preheater.
9. The online real-time measurement device for the air leakage rate of the flue of claim 1, characterized in that: the second oxygen sampling device is arranged at a position 2-4 meters away from the outlet of the air preheater.
10. The online real-time measurement device for the air leakage rate of the flue of claim 1, characterized in that: the inlet of the flue gas pipeline is provided with a hearth, and the outlet of the flue gas pipeline is sequentially provided with a desulfurizing tower and a chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221923895.2U CN218121529U (en) | 2022-07-25 | 2022-07-25 | Online real-time measuring device of flue rate of leaking out |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221923895.2U CN218121529U (en) | 2022-07-25 | 2022-07-25 | Online real-time measuring device of flue rate of leaking out |
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| CN218121529U true CN218121529U (en) | 2022-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221923895.2U Active CN218121529U (en) | 2022-07-25 | 2022-07-25 | Online real-time measuring device of flue rate of leaking out |
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| CN (1) | CN218121529U (en) |
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2022
- 2022-07-25 CN CN202221923895.2U patent/CN218121529U/en active Active
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