CN219757410U - Grid type flow-speed multi-partition flue gas flow accurate measurement device - Google Patents
Grid type flow-speed multi-partition flue gas flow accurate measurement device Download PDFInfo
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- CN219757410U CN219757410U CN202320903017.2U CN202320903017U CN219757410U CN 219757410 U CN219757410 U CN 219757410U CN 202320903017 U CN202320903017 U CN 202320903017U CN 219757410 U CN219757410 U CN 219757410U
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- flow
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- 238000005259 measurement Methods 0.000 title claims abstract description 33
- 238000005192 partition Methods 0.000 title claims abstract description 30
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 239000003546 flue gas Substances 0.000 title claims abstract description 18
- 230000003068 static effect Effects 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000010926 purge Methods 0.000 claims abstract description 6
- 239000000779 smoke Substances 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 238000012795 verification Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Measuring Volume Flow (AREA)
Abstract
The utility model discloses a grid type flow velocity multi-partition flue gas flow accurate measurement device which comprises N grid type flow velocity meters, pressure transmission pipes, switching valves, transmitters and compressed air purging devices, wherein the N grid type flow velocity meters are connected with the pressure transmission pipes; each grid-type flowmeter is formed by arranging and connecting a plurality of S-shaped backrest pipes according to a standard grid method array, can realize flow rate measurement in one partition, each flow rate partition is a measuring unit, all the S-shaped backrest pipes of the unit are mutually communicated to a full-pressure main pipe, all the static pressure pipes of the unit are mutually communicated to a static pressure main pipe, the main pipe extends and is connected with a pressure transmission pipe, and differential pressure signals of the unit can be output through the pressure transmission pipe. And finally, the accurate measurement of the flue gas flow in the complex flue is realized according to a method for calculating the flow velocity according to the speed field, so as to realize the accurate verification of the carbon emission.
Description
Technical Field
The utility model belongs to the technical field of power station boiler testing, and particularly relates to a grid type flow velocity multi-partition smoke flow accurate measuring device.
Background
Carbon emission on-line monitoring system utilizes real-time measurement of CO in flue gas 2 The concentration and the actual smoke amount, thereby calculating the carbon emission. CO at present 2 The concentration measurement technology is mature, the accuracy is high, and the flue gas flow is complicated due to the fact that an actual flue arrangement structure is complex, the uniformity of a flow velocity field is poor, and accurate measurement is often difficult.
The current large-section gas flow measuring devices are mainly of two types:
1) A standard pitot tube;
2) An ultrasonic flowmeter;
the two gas flow measuring devices are mainly applied to measurement of pressure and flow velocity of a thin-wall clean gas pipeline, and have large measurement error on fluid with complex flow. The instrument for measuring the flow in the circular tube is based on the principle of a speed difference method, is a non-contact instrument, can be used for measuring the flow of a medium with a large pipe diameter and also can be used for measuring a medium which is not easy to contact and observe, but has a complex measuring circuit, and can not accurately measure the gas of suspended particles exceeding a certain range.
Disclosure of Invention
The utility model aims to provide a grid type flow velocity multi-partition smoke flow accurate measurement device for boiler smoke with complex flow and difficult flow accurate measurement by the existing test method.
The utility model is realized by adopting the following technical scheme:
a grid type flow velocity multi-partition smoke flow precise measurement device comprises a grid type flow velocity meter, a pressure transmission pipe, a switching valve and a transmitter;
n grid-type flowmeters are arranged in the flue according to a grid method, and each grid-type flowmeter is formed by arranging and connecting a plurality of S-shaped backrest pipes according to a standard grid method array and is used for realizing flow velocity measurement of one partition;
each flow velocity zone is a measuring unit, all the S-shaped backrest pipes of the measuring unit are mutually communicated to a full-pressure main pipe, all the static pressure pipes are mutually communicated to a static pressure main pipe, the full-pressure main pipe and the static pressure main pipe extend and are connected with a pressure transmission pipe, and the pressure transmission pipe is connected to a transmitter through a switching valve.
The utility model is further improved in that the S-shaped backrest tube is manufactured according to the GB/T16157 requirement.
The utility model is further improved in that the switching valve adopts an electromagnetic valve.
The utility model is further improved in that the switching valve is used for switching differential pressure signals of all measuring units in turn and sending the differential pressure signals into the transmitter.
The utility model is further improved in that the grid-type flowmeter is provided with compressed air purging means for purging the cells that are not signal sampled in accordance with the control timing.
The utility model is further improved in that the transmitter is divided into a dynamic pressure transmitter and a static pressure transmitter.
The utility model is further improved in that the dynamic pressure transducer selects a transducer with a measuring range within 500 Pa.
A further improvement of the utility model is that the static pressure transmitter selects transmitters with measuring ranges in the range of 2000 Pa.
The utility model has at least the following beneficial technical effects:
aiming at the actual flue gas fluid with poor flow velocity field uniformity, the utility model provides a grid type flow velocity multi-partition flue gas flow accurate measurement device, dynamic pressure is measured through partition wheel inspection, and finally, the accurate measurement of the flue gas flow is realized by a flow velocity calculation method, so that accurate verification of carbon emission is realized. According to the utility model, through the partition wheel inspection measurement, the flow velocity of each partition is accurately measured, so that the flow velocity field with a full section is realized, and the accurate flue gas flow is obtained.
Drawings
Fig. 1 is a schematic structural diagram of a grid type flow velocity multi-partition flue gas flow accurate measurement device.
Reference numerals illustrate:
1 is a grid type flowmeter;
2 is a flue;
3 is a transmitter;
and 4 is a switching valve.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, the grid type flow rate multi-partition smoke flow accurate measurement device provided by the utility model comprises a grid type flow rate meter 1, a transmitter 3 and a switching valve 4; n grid-type flowmeters 1 are arranged in the flue 2 according to a grid method, each grid-type flowmeter 1 is formed by arranging and connecting a plurality of S-shaped backrest pipes according to a standard grid method array, so that flow velocity measurement of one partition can be realized, and the S-shaped backrest pipes are manufactured according to the requirements of GB/T16157. Each flow velocity partition is a measuring unit, all the S-shaped backrest pipes of the measuring unit are mutually communicated to a full-pressure main pipe, the static pressure pipes are mutually communicated to a static pressure main pipe, the main pipe extends and is connected with a pressure transmission pipe, and a differential pressure signal of the measuring unit can be output through the pressure transmission pipe.
And a switching valve 4 is arranged between the pressure transmission pipe of each subarea measuring unit and the transmitter 3, the switching valve 4 adopts an electromagnetic valve, and the switching valve 3 switches differential pressure signals of each measuring unit in turn and sends the differential pressure signals into the transmitter 3. Meanwhile, the grid type flowmeter is provided with a compressed air purging device, and a unit which does not sample signals is purged according to a control time sequence, so that blockage is prevented.
The transmitter 3 is divided into a dynamic pressure transmitter and a static pressure transmitter, wherein the dynamic pressure transmitter can select any transmitter with the measuring range within 500Pa, and the static pressure transmitter can select any transmitter with the measuring range within 2000 Pa.
During operation, each grid type flowmeter is measured through the partition wheel patrol to measure dynamic pressure and static pressure at different positions, and finally the flow velocity of the section of the whole flue is calculated according to the partition flow velocity, so that the accurate measurement of the flue gas flow in the complex flue is realized.
The utility model relates to a grid type flow-rate multi-partition flue gas flow accurate measurement device, which is used for measuring flue gas flow rates at different positions in a flue in a partition wheel inspection mode aiming at actual flue gas fluid with poor flow-rate field uniformity to obtain a speed field in the flue, and finally realizing accurate measurement of the flue gas flow according to a flow-rate calculation method of the speed field so as to realize accurate verification of carbon emission.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "one side", "one end", "one side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, in the description of the utility model, unless otherwise indicated, the meaning of "a plurality" is two or more
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The grid type flow velocity multi-partition smoke flow precise measurement device is characterized by comprising a grid type flow velocity meter, a pressure transmission pipe, a switching valve and a transmitter;
n grid-type flowmeters are arranged in the flue according to a grid method, and each grid-type flowmeter is formed by arranging and connecting a plurality of S-shaped backrest pipes according to a standard grid method array and is used for realizing flow velocity measurement of one partition;
each flow velocity zone is a measuring unit, all the S-shaped backrest pipes of the measuring unit are mutually communicated to a full-pressure main pipe, all the static pressure pipes are mutually communicated to a static pressure main pipe, the full-pressure main pipe and the static pressure main pipe extend and are connected with a pressure transmission pipe, and the pressure transmission pipe is connected to a transmitter through a switching valve.
2. The grid type flow rate multi-partition smoke flow precise measurement device according to claim 1, wherein the S-shaped backrest tube is manufactured according to the requirements of GB/T16157.
3. The grid type flow rate multi-partition smoke flow precise measurement device according to claim 1, wherein the switching valve is an electromagnetic valve.
4. The grid type flow rate multi-partition smoke flow precise measurement device according to claim 1, wherein the switching valve is used for switching differential pressure signals of all measurement units in turn and sending the differential pressure signals to the transmitter.
5. The grid-type flow-rate multi-partition flue gas flow-rate accurate measurement device according to claim 1, wherein the grid-type flow-rate meter is provided with compressed air purging means for purging the unit which is not subjected to signal sampling according to the control timing.
6. The grid type flow rate multi-partition smoke flow accurate measurement device according to claim 1, wherein the transmitters are divided into dynamic pressure transmitters and static pressure transmitters.
7. The grid type flow rate multi-partition smoke flow precise measurement device according to claim 6, wherein the dynamic pressure transmitter is selected from transmitters with measuring ranges within 500 Pa.
8. The grid type flow rate multi-partition flue gas flow accurate measurement device according to claim 6, wherein the static pressure transmitter is selected from transmitters with measuring ranges in the range of 2000 Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320903017.2U CN219757410U (en) | 2023-04-20 | 2023-04-20 | Grid type flow-speed multi-partition flue gas flow accurate measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320903017.2U CN219757410U (en) | 2023-04-20 | 2023-04-20 | Grid type flow-speed multi-partition flue gas flow accurate measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219757410U true CN219757410U (en) | 2023-09-26 |
Family
ID=88077358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320903017.2U Active CN219757410U (en) | 2023-04-20 | 2023-04-20 | Grid type flow-speed multi-partition flue gas flow accurate measurement device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219757410U (en) |
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2023
- 2023-04-20 CN CN202320903017.2U patent/CN219757410U/en active Active
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