CN220230791U - Flue gas pressure measurement blowback configuration device - Google Patents
Flue gas pressure measurement blowback configuration device Download PDFInfo
- Publication number
- CN220230791U CN220230791U CN202321222596.0U CN202321222596U CN220230791U CN 220230791 U CN220230791 U CN 220230791U CN 202321222596 U CN202321222596 U CN 202321222596U CN 220230791 U CN220230791 U CN 220230791U
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- valve
- flue gas
- pitot tube
- blowback
- flue
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000003546 flue gas Substances 0.000 title claims abstract description 40
- 238000009530 blood pressure measurement Methods 0.000 title claims abstract description 21
- 238000007664 blowing Methods 0.000 claims abstract description 36
- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 238000005259 measurement Methods 0.000 abstract description 8
- 239000000779 smoke Substances 0.000 description 12
- 238000005868 electrolysis reaction Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Control Of Fluid Pressure (AREA)
Abstract
The utility model discloses a flue gas pressure measurement blowback configuration device which comprises a wind pressure transmitter, a pitot tube and a valve, wherein the pitot tube is connected to a blowback air source through two valves, two ports of the wind pressure transmitter are respectively connected to two pipelines of the pitot tube, the connection point is positioned in front of the valve, the pitot tube is arranged on a flue gas pipeline and is communicated with the flue gas pipeline, a flue regulating valve is arranged on the flue gas pipeline, and the flue regulating valve is positioned behind the pitot tube. The utility model sets the time interval between measurement and back blowing, namely, online measurement is ensured, and meanwhile, back blowing is performed to prevent the pitot tube from being blocked.
Description
Technical Field
The utility model belongs to the technical field of air pressure measurement of electrolytic production equipment, and relates to a flue gas pressure measurement back blowing configuration device.
Background
The electrolytic aluminum production uses cryolite-alumina melt as electrolyte to produce liquid aluminum. In the production process, the electrochemical reaction is accompanied, and the smoke is generated, and contains a large amount of CO 2 And CO gas and fluorine-containing gas, and the heat dissipation of the aluminum electrolysis cell smoke discharging system accounts for a larger proportion of the heat dissipation of electrolysis production. In order to maintain the heat balance of electrolysis production and improve the electrolysis efficiency, the smoke discharge amount of the electrolysis bath needs to be standardized.
In the electrolytic smoke discharging system, the branch smoke pipes of the electrolytic tank are converged to the total smoke pipe outside the factory building, the diameter of the total smoke pipe of the work area is gradually increased from the grooves at the two ends of the work area to the middle part, and the smoke is sent to the purifying system for purifying treatment after being converged to the total smoke pipe at the middle part of the work area. Because of the numerous branches in the parallel pipelines, the design and calculation of the exhaust pipelines uniformly concentrated outside the tank become very complex, and the correlation model of pressure and flow is particularly important. In an aluminum electrolysis fume extraction system, valve adjustment is needed for a pipe network in order to enable each electrolysis cell to reach a specified flow rate no matter in normal operation or anode replacement. However, the precondition for the regulation is to define the pressure or flow of the flue gas.
In practical operation, three persons are required to work together for adjusting the pressure of the smoke tube, and a large number of gas delivery tubes are arranged at the position for measuring the pressure of the smoke tube, so that the influence on measurement operation is large. And the system pressure is regulated according to the measured single-tank pressure value, the opening of the baffle plate of the purifying fan is regulated, and whether regulation is needed or not is mainly determined according to the number of the stopping tanks and the air quantity. The detection and air quantity adjustment modes have a plurality of defects, namely, the pressure measurement and the air quantity adjustment are manually operated, the labor intensity is high, the measured value cannot reflect real change, the air quantity adjustment is delayed, the purpose is not achieved, and the adjusted air quantity is not accurate enough, so that the accurate control is not facilitated.
Moreover, because the dust content of the flue gas of the electrolytic cell is large, a measuring device which is placed in the flue gas for a long time is easy to be blocked, and the online measurement of the pressure and the flow of the flue gas of the electrolytic cell is difficult to popularize and use.
Disclosure of Invention
The utility model aims to solve the technical problems that: the utility model provides a flue gas pressure measurement blowback configuration device to solve the problem that exists among the prior art.
The technical scheme adopted by the utility model is as follows: the utility model provides a flue gas pressure measurement blowback configuration device, includes wind pressure transmitter, pitot tube and valve, and the pitot tube passes through the valve and is connected to the blowback air supply, and two ports of wind pressure transmitter are connected to two pipelines of pitot tube respectively and the tie point is located before the valve, and the pitot tube is installed on the flue gas pipeline and is communicate with it, installs the flue governing valve on the flue gas pipeline, and the flue governing valve is located behind the pitot tube.
Further, the wind pressure transmitter is connected to a controller, and the controller is connected to the flue regulating valve.
Furthermore, the valve adopts a three-way valve, an electromagnetic valve or an electric valve, and the valve (3) can be independently configured or can be configured in groups.
Further, the back-blowing air source is a compressed air source, an air pump or a fan.
An operation method of a flue gas pressure measurement back blowing configuration device comprises the following steps: when the pressure of the flue gas is measured, the valve is controlled, so that the flue gas enters the wind pressure transmitter through the pitot tube to finish the wind pressure measurement of the flue gas pipeline, and the valve opening of the flue regulating valve is controlled according to the wind pressure; during back blowing, the valve is controlled, so that back blowing gas enters the pitot tube after passing through the valve to finish back blowing on the pitot tube.
Further, the back-blowing air source is compressed air of an electrolysis workshop or exhaust of a fan, and the pressure of the back-blowing air source is 0.3-0.6 mpa; or the exhaust pressure of the air which is discharged after the crust breaking of the compressed air at the upper part of the electrolytic bath is less than 0.4MPa; the back blowing period of the back blowing air source is 1-4 times per hour, and the back blowing time is 0-30 s each time.
The utility model has the beneficial effects that: compared with the prior art, the utility model sets the time interval between measurement and back blowing, ensures online measurement, simultaneously back blowing to prevent the pitot tube from being blocked, and also adjusts the valve opening of the flue regulating valve according to the wind pressure.
Drawings
FIG. 1 is a schematic operation diagram of a flue gas pressure measurement blowback configuration device;
FIG. 2 is a schematic diagram of the operation of the flue gas pressure measurement blowback configuration device during blowback;
fig. 3 is a schematic diagram of a flue gas pressure measurement back-blowing configuration device with a back-blowing air source being a fan.
Fig. 4 is a schematic diagram of the operation of the smoke pressure measurement when the three-way valve is adopted.
FIG. 5 is a schematic diagram of the operation of the three-way valve in blowback.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific examples.
Example 1: as shown in fig. 1-3, the flue gas pressure measurement blowback configuration device comprises a wind pressure transmitter 1, a pitot tube 2 and a valve 3, wherein the pitot tube 2 is connected to a blowback air source through the two valves 3, two ports of the wind pressure transmitter 1 are respectively connected to two pipelines of the pitot tube 2, the connection point is positioned in front of the valve 3, the pitot tube 2 is arranged on a flue gas pipeline 6 and communicated with the flue gas pipeline 6, a flue regulating valve 4 is arranged on the flue gas pipeline 6, and the flue regulating valve 4 is positioned behind the pitot tube 2; the wind pressure transmitter 1 is connected to the controller, the controller is connected to the flue regulating valve 4, according to the wind pressure of the wind pressure transmitter 1 and according to the functional relation of the wind pressure and the valve opening of the flue regulating valve, the valve opening of the flue regulating valve 4 is automatically regulated, the back blowing air source is a compressed air source, and the valve 3 adopts a three-way valve, an electromagnetic valve or an electric valve.
Example 2: as shown in fig. 3, unlike in embodiment 1, the back-blowing air source is a blower 5, and the blower 5 exhausts air to the pitot tube 2, thereby realizing back-blowing and blocking removal of the pitot tube.
Example 3: as shown in fig. 1-3, a method for operating a flue gas pressure measurement back-blowing configuration device comprises the following steps: when the pressure of the flue gas is measured, the control valve 3 is closed, so that the flue gas enters the wind pressure transmitter 1 through the pitot tube 2 to finish the measurement of the pressure of the flue gas, and at the moment, the back-blowing air is blocked at the valve 3 and cannot enter the wind pressure transmitter 1 or the pitot tube 2, and the valve opening of the flue regulating valve 4 is controlled according to the measured wind pressure; during back blowing, the control valve 3 is opened, so that back blowing gas enters the pitot tube 2 after passing through the valve 3 to finish back blowing of the pitot tube 2.
Example 4: as shown in fig. 4-5, a method for operating a flue gas pressure measurement back-blowing configuration device comprises the following steps: when the pressure of the flue gas is measured, the control valve 3 is a three-way valve (which can be a three-way electromagnetic valve and a five-way electromagnetic valve) and is closed, so that the flue gas enters the wind pressure transmitter 1 through the pitot tube 2 to finish the measurement of the pressure of the flue gas, and at the moment, the back-blowing air is blocked at the valve 3 and cannot enter the wind pressure transmitter 1 or the pitot tube 2, and the valve opening of the flue regulating valve 4 is controlled according to the measured wind pressure; during back blowing, the control valve 3 is opened, so that back blowing gas enters the pitot tube 2 after passing through the valve 3 to finish back blowing of the pitot tube 2.
The back-blowing air source is the exhaust of compressed air, an air pump or a fan 5 of the electrolysis workshop, and the pressure of the back-blowing air source is 0.3-0.6 mpa; or the exhaust pressure of the air which is discharged after the crust breaking of the compressed air at the upper part of the electrolytic bath is less than 0.4MPa; the back blowing period of the back blowing air source is 1-4 times per hour, and the back blowing time is 0-30 s each time.
The foregoing is merely illustrative of the present utility model, and the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present utility model, and therefore, the scope of the present utility model shall be defined by the scope of the appended claims.
Claims (4)
1. The utility model provides a flue gas pressure measurement blowback configuration device which characterized in that: including wind pressure changer (1), pitot tube (2) and valve (3), pitot tube (2) are connected to the blowback air supply through valve (3), and two ports of wind pressure changer (1) are connected to two pipelines of pitot tube (2) respectively and the tie point is located before valve (3), and pitot tube (2) are installed on flue gas pipeline (6) and are communicated with it, install flue governing valve (4) on flue gas pipeline (6).
2. The flue gas pressure measurement blowback configuration apparatus according to claim 1, wherein: the wind pressure transmitter (1) is connected to a controller, and the controller is connected to a flue regulating valve (4).
3. The flue gas pressure measurement blowback configuration apparatus according to claim 1, wherein: the valve (3) adopts an electromagnetic valve, an electric valve or a three-way valve, and the valve (3) can be configured independently or in groups.
4. The flue gas pressure measurement blowback configuration apparatus according to claim 1, wherein: the back blowing air source is a compressed air source, an air pump or a fan (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321222596.0U CN220230791U (en) | 2023-05-19 | 2023-05-19 | Flue gas pressure measurement blowback configuration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321222596.0U CN220230791U (en) | 2023-05-19 | 2023-05-19 | Flue gas pressure measurement blowback configuration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220230791U true CN220230791U (en) | 2023-12-22 |
Family
ID=89174323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321222596.0U Active CN220230791U (en) | 2023-05-19 | 2023-05-19 | Flue gas pressure measurement blowback configuration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220230791U (en) |
-
2023
- 2023-05-19 CN CN202321222596.0U patent/CN220230791U/en active Active
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