CN218496156U - Dust remover ash bucket material level monitoring system - Google Patents
Dust remover ash bucket material level monitoring system Download PDFInfo
- Publication number
- CN218496156U CN218496156U CN202222428339.4U CN202222428339U CN218496156U CN 218496156 U CN218496156 U CN 218496156U CN 202222428339 U CN202222428339 U CN 202222428339U CN 218496156 U CN218496156 U CN 218496156U
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- sensing unit
- material level
- dust remover
- ash bucket
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to a coal fired power plant dust remover technical field especially relates to a dust remover ash bucket material level monitoring system. The utility model discloses synthesize two kinds of measuring methods of dust remover ash bucket lateral wall strain measurement and temperature measurement, through the height of the dust remover ash bucket deposition of the common monitoring of optic fibre strain sensing unit measuring result and optic fibre temperature sensing unit measuring result, and according to optic fibre strain sensing unit's measuring result and optic fibre temperature sensing unit measuring result's deviation, carry out the calibration of each other between optic fibre strain sensor and the optic fibre temperature sensor, realize the dust remover ash bucket material level monitoring's of high resolution and high accuracy technical effect.
Description
Technical Field
The utility model relates to a coal fired power plant dust remover technical field especially relates to a dust remover ash bucket material level monitoring system.
Background
In order to meet the higher requirement of environmental protection on the quality of an air environment, a dust remover is installed in large and medium-sized units with the power of more than 125MW in China in a matching way, but because the selection of an ash bucket material level monitoring device is not satisfactory all the time, the abnormal condition of power plant material level monitoring generally exists, the automatic process of an ash bucket ash discharging and discharging system is influenced to a certain extent, the load of the dust remover is increased seriously due to the fact that the dust bucket is excessively full of ash, the structural design intensity allowance can be exceeded possibly, and potential hidden dangers are brought to the safe operation of the dust remover. Therefore, the device for monitoring the material level is researched and the early warning function of the device is exerted, so that the device has practical economic and social significance.
The ash bucket material level monitoring devices used by electric dust collectors of domestic power plants are classified into 2 types, namely an inner contact type device and an outer vertical type device. The internal contact type comprises a mercury bubble contact type, a capacitance type, an inductance type, a fork type, a photoelectric type and the like; the external vertical type mainly refers to a nuclear radiation type. However, the two technical means only rely on a single signal source to monitor the dust accumulated in the dust hopper of the dust remover, and once the factors disturbing the single signal source appear, the phenomenon of inaccurate monitoring can occur.
SUMMERY OF THE UTILITY MODEL
The utility model provides a dust remover ash bucket material level monitoring system to solve current dust remover ash bucket material level monitoring devices and only rely on single signal source to detect dust remover ash bucket deposition, appear detecting inaccurate technical problem, improve the reliability of dust remover ash bucket material level monitoring result.
For solving the technical problem, the embodiment of the utility model provides a dust remover ash bucket material level monitoring system, include: the optical fiber strain sensor comprises an optical fiber strain sensing unit, an optical fiber temperature sensing unit, a demodulation unit and a processing unit which are sequentially connected through optical fibers, wherein the optical fiber strain sensing unit is arranged on the outer side wall of a dust remover ash bucket, and the optical fiber temperature sensing unit is arranged on the inner side wall of the dust remover ash bucket and corresponds to the arrangement position of the optical fiber strain sensing unit.
In a further embodiment, the optical fiber strain sensing unit comprises a plurality of quasi-distributed optical fiber strain sensors, and the optical fiber strain sensors are arranged on the periphery of the outer side wall of the dust hopper of the dust remover.
In a further embodiment, the optical fiber temperature sensing unit comprises a plurality of quasi-distributed optical fiber temperature sensors, and the optical fiber temperature sensors are arranged around the inner side wall of the dust hopper of the dust remover.
In a further embodiment, the optical fiber strain sensing unit comprises a high-level optical fiber strain sensing unit and a low-level optical fiber strain sensing unit, and the optical fiber temperature sensing unit comprises a high-level optical fiber temperature sensing unit and a low-level optical fiber temperature sensing unit;
the high material level optical fiber strain sensing unit and the high material level optical fiber temperature sensing unit are arranged at a high material level detection point on the side wall of the dust remover ash bucket, and the low material level optical fiber strain sensing unit and the low material level optical fiber temperature sensing unit are arranged at a low material level detection point on the side wall of the dust remover ash bucket.
In a further embodiment, the optical fiber strain sensor unit and the optical fiber temperature sensor unit use the same sensing element.
In a further embodiment, the system further comprises an alarm unit, which is connected to the processing unit.
In a further embodiment, the system further comprises a display unit, which is connected with the processing unit.
In a further embodiment, the optical fiber strain sensing unit and the optical fiber temperature sensing unit each include a plurality of optical fiber strain sensing units and optical fiber temperature sensing units, which are respectively disposed on the side walls of different dust remover ash hoppers and are connected in series with each other.
The utility model provides a dust remover ash bucket material level monitoring system only relies on single signal source to detect dust remover ash bucket deposition to current dust remover ash bucket material level monitoring devices, appears detecting inaccurate technical problem. The utility model discloses synthesize two kinds of measuring methods of dust remover ash bucket lateral wall strain measurement and temperature measurement, monitor the height of dust remover ash bucket deposition jointly through optic fibre strain sensing unit and optic fibre temperature sensing unit to according to optic fibre strain sensing unit measuring result and optic fibre temperature sensing unit measuring result's deviation, carry out the calibration of each other between optic fibre strain sensor and the optic fibre temperature sensor, realize the dust remover ash bucket material level monitoring's of high resolution and high accuracy technical effect. Compared with the prior art, inside the dust remover of high dust content, realize the real-time accurate technological effect of monitoring dust remover ash bucket material level to through the calibration of each other of two kinds of monitoring methods, further assurance monitoring effect's precision.
Drawings
FIG. 1 is a schematic view of a dust catcher ash hopper material level monitoring system in an embodiment of the present invention;
FIG. 2 is a schematic view of a structure of a plurality of ash hopper level monitoring systems connected in series according to an embodiment of the present invention;
reference numerals:
1-an optical fiber strain sensing unit; 2-an optical fiber temperature sensing unit; 3-a demodulation unit; 4-a processing unit; 5-dust collector ash bucket; 6-a transmission fiber; 7-a display unit; 101-a low level fiber strain sensing unit; 102-a high level optical fiber strain sensing unit; 201-low level optical fiber temperature sensing unit; 202-high level fiber optic temperature sensing unit.
Detailed Description
The following embodiments of the present invention are specifically illustrated in the accompanying drawings, and the examples are given for illustrative purposes only and are not to be construed as limiting the present invention, including the drawings, which are given for reference and illustration only and do not limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
Please refer to fig. 1, in the embodiment of the present invention, a dust remover ash bucket material level monitoring system is provided, the system includes optical fiber strain sensing unit 1, optical fiber temperature sensing unit 2, demodulation unit 3 and processing unit 4 which are connected by optical fiber in sequence, the optical fiber strain sensing unit 1 is disposed on the outer side wall of the dust remover ash bucket 5, the optical fiber temperature sensing unit 2 is disposed on the inner side wall of the dust remover ash bucket 5, and the setting position of the optical fiber strain sensing unit 1 is corresponding.
The dust remover ash bucket is used for collecting fly ash in the dust removing process, when dust in the dust remover ash bucket 5 increases, heavier dust acts on the side wall of the dust remover ash bucket 5 to increase the strain of the side wall, the relation between the dust thickness and the strain of the side wall is established, the strain of the side wall of the dust remover ash bucket is obtained by the optical fiber strain sensing unit 1 arranged on the outer side wall of the dust remover ash bucket 5, and the data of the ash deposition height in the dust remover ash bucket is obtained through the strain of the side wall of the dust remover ash bucket. Because the dust temperature that produces after the burning is higher, the dust temperature that just fell into dust remover ash bucket 5 can be higher than the dust of a period of time of having cooled down in the dust remover ash bucket, utilizes the temperature sensing unit 2 of setting up in 5 inside walls of dust remover ash bucket to acquire the temperature of 5 lateral walls of dust remover ash bucket, through the change of the inside temperature of perception 5 lateral walls of dust remover ash bucket, measures the height of the inside dust of dust remover ash bucket 5. The optical fiber strain sensing unit 1 has higher measurement resolution than the optical fiber temperature sensing unit 2, the working principle is that the dust quality is measured, and then the dust height is indirectly measured, but the influence of factors such as dust density change and hardening degree change is easily caused, and then the accuracy of material level monitoring is influenced. The optical fiber temperature sensing unit 2 obtains dust height data through the temperature of the dust by measuring the temperature of the dust, but the accuracy of the measuring result is influenced due to the fact that the boundary is not obvious in the internal temperature of the dust hopper of the dust remover.
The embodiment of the utility model provides an in combine two kinds of measuring methods, utilize optic fibre strain sensing unit 1 and optic fibre temperature sensing unit 2 to measure the height of dust remover ash bucket deposition jointly to the deviation value through 1 measuring result of optic fibre strain sensing unit and 2 measuring results of optic fibre temperature sensing unit calibrates each other optic fibre strain sensing unit 1 and 2 measuring data of optic fibre temperature sensing unit, realizes the dust remover dust material level monitoring of high resolution and high accuracy.
The embodiment of the utility model provides an in, optic fibre sensing unit 1 that meets an emergency sets up around 5 lateral walls of dust remover ash bucket, and optic fibre temperature sensing unit 2 sets up around 5 inside walls of dust remover ash bucket, and optic fibre temperature sensing unit 2 set up the position and optic fibre sensing unit 1 that meets an emergency sets up the position corresponding to guarantee that optic fibre temperature sensing unit 2 and optic fibre sensing unit 1 measuring are the dust height of same position. The optical fiber strain sensing unit 1 comprises a plurality of quasi-distributed optical fiber strain sensors, and the optical fiber temperature sensing unit 2 comprises a plurality of quasi-distributed optical fiber temperature sensors. The side wall of the dust remover ash bucket 5 generally comprises four surfaces, a high material level threshold value and a low material level threshold value are set according to the actual operation working condition of a power plant, the positions of the side walls of the dust remover ash bucket at the high material level threshold value and the low material level threshold value are determined to be points with large stress and uniform stress according to the high material level threshold value, the low material level threshold value and the mechanical simulation result of the side wall of the dust remover ash bucket 5, the points are respectively a high material level monitoring point and a low material level monitoring point, the optical fiber strain sensors are arranged at the high material level monitoring point and the low material level monitoring point of the peripheral outer side wall of the dust remover ash bucket 5, and the optical fiber temperature sensors are arranged on the inner side wall corresponding to the optical fiber strain sensor arrangement points. The optical fiber strain sensor and the optical fiber temperature sensor at the high material level detection point are the high material level optical fiber strain sensing unit 102 and the high material level optical fiber temperature sensing unit 202, and the optical fiber strain sensor and the optical fiber temperature sensor at the low material level detection point are the low material level optical fiber strain sensing unit 101 and the low material level optical fiber temperature sensing unit 201.
The embodiment of the utility model provides an in, optic fibre strain sensor unit 1 adopts the same sensing element with optic fibre temperature sensor unit 2 to in series access dust remover ash bucket material level monitoring system with optic fibre strain sensor unit 1 and optic fibre temperature sensor unit 2. The optical fiber strain sensor units and the optical fiber temperature sensor units of different dust catcher dust hoppers can be connected in series and are connected with the demodulation unit 3 through the transmission optical fiber 6.
Under the normal operation state of the dust remover, dust shaken off is continuously collected in the dust hopper, when the height of the deposited dust reaches a high material level monitoring point, the high material level optical fiber strain sensing unit 102 and the high material level optical fiber temperature sensing unit 202 transmit signals to the demodulation unit 3 through the transmission optical fiber 6, the acquired data are demodulated, and the demodulated optical fiber signals are transmitted to the control unit 4 through the transmission optical fiber 6.
When the deviation value of the ash deposition height data of the ash hopper of the dust remover monitored by the high material level optical fiber strain sensing unit 102 and the ash deposition height data of the ash hopper 5 of the dust remover monitored by the high material level optical fiber temperature sensing unit 202 is within a set deviation value, the ash deposition height data monitored by the high material level optical fiber strain sensing unit 102 is taken as a standard, and whether the feeding valve of the dust remover bin pump is opened or not is determined according to the ash deposition height data monitored by the high material level optical fiber strain sensing unit 102.
When the deviation value of the dust collector ash bucket ash deposition height data monitored by the high material level optical fiber strain sensing unit 102 and the deviation value of the dust collector ash bucket 5 ash deposition height data monitored by the high material level optical fiber temperature sensing unit 202 are larger than the set deviation value, mutual calibration of the data measured by the high material level optical fiber strain sensing unit 102 and the high material level optical fiber temperature sensing unit 202 is carried out, and when the deviation value of the data monitored by the two sensing units reaches the set deviation value, whether the dust collector bin pump feeding valve is opened or not is determined according to the ash deposition height data monitored by the calibrated high material level optical fiber strain sensing unit 102.
If the feed valve of the dust collector bin pump needs to be opened, the control unit 4 is linked with a control system of the main control room to start the alarm unit, control the feed valve of the dust collector bin pump to be opened, close the discharge valve, the air inlet valve, the blow-assisting valve and the like of the bin pump at the same time, discharge dry ash from the ash bucket to the bin pump for dumping, and finally display data on the terminal display unit 7.
When the height of the dust accumulated in the dust hopper 5 of the dust remover is lower than a low material level monitoring point, the low material level optical fiber strain sensing unit 101 and the low material level optical fiber temperature sensing unit 201 transmit signals to the demodulation unit 3 through the transmission optical fiber 6, demodulate the acquired data, and transmit the demodulated optical fiber signals to the control unit 4 through the transmission optical fiber 6.
When the deviation value of the ash deposition height data of the ash hopper 5 of the dust remover monitored by the low material level optical fiber strain sensing unit 101 and the deviation value of the ash deposition height data of the ash hopper 5 of the dust remover monitored by the low material level optical fiber temperature sensing unit 201 are within a set deviation value, the ash deposition height data monitored by the low material level optical fiber strain sensing unit 101 is taken as a reference, and whether the closing of a feed valve of a dust remover bin pump is carried out or not is determined according to the ash deposition height data monitored by the low material level optical fiber strain sensing unit 101.
When the deviation value of the dust-collecting height data of the dust collector dust hopper 5 monitored by the low-material-level optical fiber strain sensing unit 101 and the deviation value of the dust-collecting height data of the dust collector dust hopper 5 monitored by the low-material-level optical fiber temperature sensing unit 201 are larger than a set deviation value, mutual calibration of the data measured by the low-material-level optical fiber strain sensing unit 101 and the data measured by the low-material-level optical fiber temperature sensing unit 201 is carried out, and when the deviation value of the data monitored by the two sensing units reaches the set deviation value, whether the closing of the feed valve of the dust collector bin pump is carried out or not is determined according to the corrected data of the dust-collecting height monitored by the low-material-level optical fiber strain sensing unit 101.
If the feed valve of the bin pump of the dust remover needs to be closed, the control unit 4 is linked with a control system of the main control room to start the alarm unit, control the feed valve of the bin pump of the dust remover system to be closed, simultaneously open a discharge valve, an air inlet valve, a blowing-assisting valve and the like of the bin pump, stop the dry ash from being discharged from the ash bucket to the bin pump for dumping, and finally display data on the terminal display platform 7.
The embodiment of the utility model provides an in, optic fibre strain sensing unit 1 easily receives the interference of factors such as dust density change, the degree of hardening change, influences monitoring data's accuracy, increases the change of optic fibre temperature sensing unit 2 monitoring dust remover ash bucket material level, and both calibrate the dust remover ash bucket material level monitoring who realizes high resolution and high accuracy mutually.
A dust remover ash bucket material level monitoring system in this embodiment only relies on single signal source to detect dust remover ash bucket deposition to current dust remover ash bucket material level monitoring devices, appears detecting inaccurate technical problem. The utility model discloses synthesize two kinds of measuring methods, monitor the height of dust remover ash bucket deposition jointly through optic fibre sensing unit that meets an emergency and optic fibre temperature sensing unit to according to optic fibre sensing unit that meets an emergency measuring result and optic fibre temperature sensing unit measuring result's deviation value, carry out the calibration of each other between optic fibre sensing unit that meets an emergency and the optic fibre temperature sensing unit, realize the dust remover ash bucket material level monitoring of high resolution and high accuracy. Compared with the prior art, inside the dust remover of high dust content, realize the real-time accurate technological effect of monitoring dust remover ash bucket material level to through the calibration of each other of two kinds of monitoring methods, further assurance monitoring effect's precision.
The above-mentioned embodiments only express some preferred embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, without departing from the technical principle of the present invention, several modifications and substitutions can be made, and these should also be regarded as the protection scope of the present application. Therefore, the protection scope of the present patent shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a dust remover ash bucket material level monitoring system which characterized in that includes: the optical fiber strain sensor comprises an optical fiber strain sensing unit, an optical fiber temperature sensing unit, a demodulation unit and a processing unit which are sequentially connected through optical fibers, wherein the optical fiber strain sensing unit is arranged on the outer side wall of the dust remover ash bucket, and the optical fiber temperature sensing unit is arranged on the inner side wall of the dust remover ash bucket and corresponds to the setting position of the optical fiber strain sensing unit.
2. The dust remover ash bucket material level monitoring system of claim 1, wherein the optical fiber strain sensing unit comprises a plurality of quasi-distributed optical fiber strain sensors, and the optical fiber strain sensors are arranged around the outer side wall of the dust remover ash bucket.
3. The ash hopper material level monitoring system of claim 2, wherein the optical fiber temperature sensing unit comprises a plurality of quasi-distributed optical fiber temperature sensors, and the optical fiber temperature sensors are arranged around the inner side wall of the ash hopper of the dust collector.
4. The dust catcher ash hopper material level monitoring system of claim 3, wherein said optical fiber strain sensing unit comprises a high material level optical fiber strain sensing unit and a low material level optical fiber strain sensing unit, and said optical fiber temperature sensing unit comprises a high material level optical fiber temperature sensing unit and a low material level optical fiber temperature sensing unit;
the high material level optical fiber strain sensing unit and the high material level optical fiber temperature sensing unit are arranged at a high material level detection point on the side wall of the dust remover ash bucket, and the low material level optical fiber strain sensing unit and the low material level optical fiber temperature sensing unit are arranged at a low material level detection point on the side wall of the dust remover ash bucket.
5. The dust collector ash hopper material level monitoring system of any one of claims 1 to 4, wherein the optical fiber strain sensing unit and the optical fiber temperature sensing unit adopt the same sensing element.
6. The dust collector ash hopper material level monitoring system of claim 1 further comprising an alarm unit, said alarm unit being connected to said processing unit.
7. The ash hopper level monitoring system of claim 1 further comprising a display unit, wherein the display unit is connected to the processing unit.
8. The ash bucket material level monitoring system of claim 1, wherein the optical fiber strain sensing unit and the optical fiber temperature sensing unit are respectively arranged on the side walls of different ash buckets of the dust collector and are connected in series with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222428339.4U CN218496156U (en) | 2022-09-13 | 2022-09-13 | Dust remover ash bucket material level monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222428339.4U CN218496156U (en) | 2022-09-13 | 2022-09-13 | Dust remover ash bucket material level monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218496156U true CN218496156U (en) | 2023-02-17 |
Family
ID=85190177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222428339.4U Active CN218496156U (en) | 2022-09-13 | 2022-09-13 | Dust remover ash bucket material level monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218496156U (en) |
-
2022
- 2022-09-13 CN CN202222428339.4U patent/CN218496156U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101101265B (en) | Power transmission and transformation equipment outer insulation equivalent ash deposit density measuring method and device | |
| CN101576593B (en) | Array type inferior insulator local electric field detector and inverse diagnosis method | |
| CN102374927A (en) | Leakage detection device and detection method using same | |
| CN218496156U (en) | Dust remover ash bucket material level monitoring system | |
| CN110319957B (en) | Fault diagnosis method for irregular abnormal value of sensor of ship structure stress monitoring system | |
| CN104089656B (en) | A kind of stockyard spontaneous combustionof coal detection method and device | |
| CN110044406A (en) | A kind of cotton pile fire monitoring System and method for based on the more sensor arrays of gas | |
| CN203117440U (en) | Meteorological collection device | |
| CN101813494B (en) | Method for eliminating interference of sensor and outside thereof | |
| CN208037231U (en) | A kind of coating powder storing tank | |
| CN201653490U (en) | Material level detecting system | |
| CN208499829U (en) | A kind of slag storehouse system of novel weighing type level measurement | |
| CN109255932B (en) | Inclination alarm device based on pressure | |
| CN101732920B (en) | Leak detector of bag-type dust remover | |
| CN207019626U (en) | A kind of cracking of wall surface detector | |
| CN211042304U (en) | Integrated monitoring device for transformer oil conservator | |
| CN101968373A (en) | Negative pressure monitoring system and negative pressure monitoring method for powder measurement | |
| CN211574786U (en) | Pipeline strain monitoring system based on sensor | |
| CN219791498U (en) | Boiler feeder with metal detection function | |
| CN115615514A (en) | Composite practical electric dust and ash bucket material level measuring device and working method thereof | |
| CN203443630U (en) | Tailing pond water level automatic monitoring and early warning system | |
| CN207191990U (en) | Automatic removing dust ash bucket under the accident dust stratification state of deduster | |
| CN112326788A (en) | Monitoring and early warning method and system for instability of tailing dam | |
| CN206223345U (en) | Sewer overvoltage detection means | |
| CN202274972U (en) | Capacitance sensing type bag deduster leak detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |