CN210646831U - Wet electrostatic precipitator positive pole module temperature and stress monitoring system - Google Patents
Wet electrostatic precipitator positive pole module temperature and stress monitoring system Download PDFInfo
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- CN210646831U CN210646831U CN201921485594.4U CN201921485594U CN210646831U CN 210646831 U CN210646831 U CN 210646831U CN 201921485594 U CN201921485594 U CN 201921485594U CN 210646831 U CN210646831 U CN 210646831U
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Abstract
The utility model discloses a wet electrostatic precipitator positive pole module temperature and stress monitoring system, positive pole module comprise a set of single tube, mediate device, alarm device and computer control device including monitor probe, wavelength, lay a plurality of monitor probe through connection optical cable series connection between per two adjacent positive pole module single tubes, monitor probe is connected with the wavelength mediation device through connection optical cable, and alarm device and computer control device are connected with the wavelength mediation device respectively. The utility model discloses can realize easily directly perceivedly reading temperature and stress index at the splendid attire dehumidification positive pole glass fiber reinforced plastic material.
Description
Technical Field
The utility model relates to a wet dedusting technical field of the ultra-clean emission of flue gas of thermal power plant, a wet electrostatic precipitator positive pole module temperature and stress monitoring system specifically says so.
Background
The conductive glass fiber reinforced plastics are widely applied to the anode module of the wet electrostatic dust collector because of various advantages. But the glass fiber reinforced plastics are composite materials and have the problems of fire risk and performance aging.
The working condition and operation environment of the wet electrostatic dust collector are as follows: acid wet flue gas with the temperature of 50-60 ℃ and the high voltage (DC) of 40KV-50 KV. Conventional sensors are not suitable for the environment, and online monitoring of materials is difficult to achieve.
In the operation stage of the wet electrostatic dust collector, due to the operation and management errors, serious fire accidents of the wet electrostatic dust collector occur, and the wet electrostatic dust collector is scrapped. Although fire accidents occur frequently, no effective fire alarm means is provided for the glass fiber reinforced plastic material of the anode module of the wet electrostatic dust collector.
At present, the mechanical property of the material of the anode module of the wet electrostatic precipitator is detected by a periodic detection method. The power plant needs to sample and evaluate the retention rate of mechanical properties and the extended life of materials during the overhaul period (every 3-4 years). The existing methods are destructive sampling and sample supplementing. And the sampling rate is 2 per mill (according to DL/T1844-.
Therefore, if a system capable of monitoring the glass fiber reinforced plastic material fire alarm and stress monitoring on line is provided, the operation safety and reliability of the wet electrostatic dust collector can be greatly improved.
Disclosure of Invention
The utility model aims at the defects in the prior art, and provides a temperature and stress monitoring system for an anode module of a wet electrostatic dust collector.
The utility model aims at realizing through the following technical scheme:
the utility model provides a wet electrostatic precipitator positive pole module temperature and stress monitoring system, the positive pole module comprises a set of single tube, mediates device, alarm device and computer control device including monitoring probe, wavelength, lays a plurality of monitoring probes through connection optical cable series connection between per two adjacent positive pole module single tubes, monitoring probe pass through connection optical cable with the wavelength is mediated the device and is connected, alarm device and computer control device respectively with the wavelength is mediated the device and is connected.
The utility model discloses in the further design, above-mentioned monitoring probe includes first single mode grating, second single mode grating and heat conduction temperature-sensing element, first single mode grating and second single mode grating tip welded connection form the measurement grating, and first single mode grating is connected with the connection optical cable respectively with the second single mode grating other end, and first single mode grating is equipped with the probe protection pipe with second single mode grating overcoat, heat conduction temperature-sensing element is located in the probe protection pipe.
In a further embodiment of the present invention, the probe protection tube is a stainless steel tube.
The utility model discloses in the further design, above-mentioned measurement grating is Bragg fiber grating, and heat conduction temperature-sensing element's material is copper.
In the further design scheme of the utility model, a plurality of monitoring probes are laid along anode module single tube axial, and the interval is 1 meter between the adjacent monitoring probes. Each single tube is longitudinally provided with a monitoring probe as a group of probes.
In the further design scheme of the utility model, the monitoring probe and the connecting optical cable which are arranged between the single tubes of the anode module are coated with a layer of thin epoxy resin.
In the further design scheme of the utility model, the connecting optical cable extending out of the anode module is protected by a protective sleeve or a protective sheet or a gasket at the joint of the anode module.
In a further design of the present invention, the wavelength tuning device has a model of BT-200, and the alarm device has a model of BJ-300.
The utility model discloses in the further design, the signal transmission that above-mentioned wavelength mediation device surveyed each monitor for computer controlling means, carry out the calculation by computer controlling means and resolve out the indicating value of temperature and stress and take notes and show, when temperature or stress surpassed the design value, produce alarm signal, computer controlling means gives alarm device with alarm signal transmission, and alarm device sends the reputation and reports to the police, alarm signal includes overtemperature alarm and limit warning.
The utility model discloses in the further design, still include the remote access computer, the remote access computer with computer controlling means passes through wireless network and connects.
The utility model discloses following outstanding beneficial effect has:
the utility model discloses a wet electrostatic precipitator positive pole module temperature and stress monitoring system can realize easily directly perceivedly reading the temperature and the index of meeting an emergency of dehumidification anode glass steel material in labour service.
The utility model discloses well used measurement grating is prague fiber grating. The Bragg fiber grating optical fiber has small volume, low cost, no electromagnetic interference and corrosion resistance, and can be embedded in materials for distribution measurement. Being passive, has the characteristic of zero drift and can be used for many years without recalibration.
Drawings
FIG. 1 is a schematic diagram of a system for monitoring temperature and stress of an anode module of a wet electrostatic precipitator according to an embodiment;
FIG. 2 is a schematic structural diagram of a monitoring probe in an embodiment;
FIG. 3 is a sectional view of an anode module for arranging a monitoring probe in the embodiment;
FIG. 4 is a longitudinal schematic view of the monitoring probe arrangement in the embodiment;
in the figure, 1-anode module single tube, 2-monitoring probe, 3-wavelength adjusting device, 4-alarming device, 5-computer control device, 6-remote access computer, 7-connecting optical cable, 8-first single-mode grating, 9-second single-mode grating, 10-heat-conducting temperature-sensing element, 11-measuring grating and 12-probe protection tube.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
Referring to fig. 1-4, the utility model discloses in a wet electrostatic precipitator positive pole module temperature and stress monitoring system, the positive pole module comprises the single tube of a set of 5 meters long, temperature and stress monitoring system includes monitor 2, the wavelength mediation device 3, alarm device 4, computer controlling means 5 and remote access computer 6, lay a plurality of monitor 2 through 7 series connection of connecting optical cable between per two adjacent positive pole module single tubes 1, monitor 2 is connected with wavelength mediation device 3 through connecting optical cable 7, a plurality of monitor 2 are laid along positive pole module single tube 1 axial, interval 1 meter between the adjacent monitor 2. Every other meter of a single tube with five meters is provided with 4 gratings. The alarm device 4 and the computer control device 5 are connected to the wavelength adjusting device 3. The sensing signal is sent to a computer control device 5 through an optical cable and a wavelength demodulation device, the wavelength demodulation device 3 transmits the signal measured by each monitoring probe 2 to the computer control device 5, the computer control device 5 carries out calculation to analyze indicating values of temperature and stress and records and displays the indicating values, when the temperature or the stress exceeds a set value, an alarm signal is generated, the computer control device 5 transmits the alarm signal to an alarm device 4, the alarm device 4 sends out sound and light alarm, and the alarm signal comprises over-temperature alarm and limit alarm. The model of the wavelength adjusting device 3 is BT-200, and the model of the alarm device 4 is BJ-300. The remote access computer 6 is connected to the computer control device 5 via a wireless network. Referring to the attached drawing 2, the monitoring probe 2 comprises a first single-mode grating 8, a second single-mode grating 9 and a heat-conducting temperature sensing element 10, the end portions of the first single-mode grating 8 and the second single-mode grating 9 are connected in a welding mode to form a measurement grating 11, the other ends of the first single-mode grating 8 and the second single-mode grating 9 are respectively connected with a connecting optical cable 7, a probe protection tube 12 is sleeved outside the first single-mode grating 8 and the second single-mode grating 9, and the probe protection tube 12 is a stainless steel tube. The measurement grating 11 is a bragg fiber grating, and the first single-mode grating 8 and the second single-mode grating 9 have the same period and different refractive indexes and temperature coefficients. The heat-conducting temperature-sensing element 10 is arranged in the probe protection tube 12. Because the measurement grating 11 is in the storage tube, the temperature transmission is not uniform, and the used heat conduction temperature sensing element 10 is a copper sheet wrapped outside the measurement grating 11 and is only used for uniformly transmitting heat to the measurement grating 11. The measurement grating 11 is affected by temperature and stress, which will cause a change in wavelength. Both the temperature and strain measurements are read by a demodulator by measuring the change in the grating 11.
When the monitoring probe 2 is arranged, in order to protect the optical fiber and the connecting optical cable 7, the monitoring probe 2 and the connecting optical cable 7 which are arranged between the anode module single tubes 1 are pre-coated with a thin layer of epoxy resin. To increase the toughness, i.e., damage resistance, of the optical fiber. The epoxy resin is also used as an adhesive to fix the optical fiber on the tube wall, so that the optical fiber is prevented from moving or deforming in subsequent operation, and the sensing precision and sensitivity of the formed sensor are prevented from being influenced. After the optical fibers are laid, after the epoxy resin is cured to fix the optical fibers and the connection optical cable 7, glue brushing, bonding, end sealing and integral forming between the tubes are carried out.
The joint portion of the connection cable 7 drawn out from the test piece is liable to be crushed and broken by being at the edge of the test piece. And the resin often sticks to the surface of the stub cable 7 at the edges, causing the stub cable 7 to become brittle and brittle, thus protecting it. The connecting optical cable 7 extending out of the anode module is protected by a protective sleeve of a probe protective tube 12 at the joint with the anode module. The protective sleeve is sealed after splicing, so that the protection of the optical fiber is more critical. Because the sleeve is applied to damp, hot and corrosive smoke environments, the sleeve for protecting the smoke is protected by adopting an anti-corrosion function. And the leading-out wire joint of the optical fiber needs sealing treatment to prevent the invasion of foreign matters.
The utility model discloses carry out real-time measurement when rising and the stress change unusually to the target temperature that monitors. Meanwhile, the temperature measuring points arranged on the periphery of the wet electrostatic dust collector and the monitored data are used for calibration and compensation.
The utility model discloses a measurement principle and method do: two fiber gratings with the same period, different refractive indexes and different temperature coefficients are welded together, and the fiber gratings are formed after the connection of the optical fibers and serve as the measurement gratings 11. Because different optical fiber materials have different photo-thermal coefficients, the reflection wavelength has different temperature responses. The temperature and the stress can be measured simultaneously by detecting the change of the reflection peak wavelength of the single light source in the two fiber gratings for joint calculation. When the environment of the monitoring probe 2 changes in temperature and stress, the changes are transmitted from the probe protection tube 12 to the measurement grating 11, resulting in a change in wavelength. By detecting the change of the wavelength, the environmental temperature and the stress of the measuring point are obtained, and the purposes of measuring the temperature and sensing the stress are achieved.
Above is the utility model discloses a preferred embodiment, all rely on the utility model discloses the change that technical scheme made, produced functional action does not surpass the utility model discloses during technical scheme's scope, all belong to the utility model discloses a protection scope.
Claims (10)
1. The utility model provides a wet electrostatic precipitator positive pole module temperature and stress monitoring system, the positive pole module comprises a set of single tube, its characterized in that, including monitoring probe (2), wavelength mediation device (3), alarm device (4) and computer controlling means (5), lay a plurality of monitoring probe (2) through connecting optical cable (7) series connection between per two adjacent positive pole module single tubes (1), monitoring probe (2) through connecting optical cable (7) with wavelength mediation device (3) are connected, alarm device (4) and computer controlling means (5) respectively with wavelength mediation device (3) are connected.
2. The system for monitoring the temperature and the stress of the anode module of the wet electrostatic precipitator according to claim 1, wherein the monitoring probe (2) comprises a first single-mode grating (8), a second single-mode grating (9) and a heat-conducting temperature-sensing element (10), the ends of the first single-mode grating (8) and the second single-mode grating (9) are welded to form a measurement grating (11), the other ends of the first single-mode grating (8) and the second single-mode grating (9) are respectively connected with a connection optical cable (7), a probe protection tube (12) is sleeved outside the first single-mode grating (8) and the second single-mode grating (9), and the heat-conducting temperature-sensing element (10) is arranged in the probe protection tube (12).
3. The wet electrostatic precipitator anode module temperature and stress monitoring system of claim 2, wherein the probe protection tube (12) is a stainless steel tube.
4. The system for monitoring the temperature and stress of the anode module of the wet electrostatic precipitator according to claim 2, wherein the measurement grating (11) is a fiber bragg grating, and the heat-conducting temperature-sensing element (10) is made of copper.
5. The system for monitoring the temperature and the stress of the anode module of the wet electrostatic precipitator according to claim 1, wherein a plurality of monitoring probes (2) are arranged along the axial direction of the single tube (1) of the anode module, and the interval between the adjacent monitoring probes (2) is 1 meter.
6. The system for monitoring the temperature and stress of the anode module of the wet electrostatic precipitator according to claim 1, wherein the monitoring probes (2) and the connecting optical cables (7) arranged between the single tubes (1) of the anode module are coated with a thin epoxy resin layer.
7. The wet electrostatic precipitator anode module temperature and stress monitoring system according to claim 1, wherein the connection optical cable (7) extending outside the anode module is protected at the connection with the anode module by a protective sleeve or a protective sheet or a gasket.
8. The system for monitoring the temperature and stress of the anode module of the wet electrostatic precipitator according to claim 1, wherein the wavelength adjusting device (3) is of the type BT-200, and the alarm device (4) is of the type BJ-300.
9. The system for monitoring the temperature and the stress of the anode module of the wet electrostatic precipitator according to claim 1, wherein the wavelength adjusting device (3) transmits signals measured by each monitoring probe (2) to the computer control device (5), the computer control device (5) performs calculation to analyze and record and display indicating values of the temperature and the stress, when the temperature or the stress exceeds a set value, an alarm signal is generated, the computer control device (5) transmits the alarm signal to the alarm device (4), the alarm device (4) gives out an audible and visual alarm, and the alarm signal comprises an overtemperature alarm and a limit alarm.
10. The wet electrostatic precipitator anode module temperature and stress monitoring system according to claim 1, further comprising a remote access computer (6), wherein the remote access computer (6) is connected with the computer control device (5) through a wireless network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921485594.4U CN210646831U (en) | 2019-09-09 | 2019-09-09 | Wet electrostatic precipitator positive pole module temperature and stress monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921485594.4U CN210646831U (en) | 2019-09-09 | 2019-09-09 | Wet electrostatic precipitator positive pole module temperature and stress monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210646831U true CN210646831U (en) | 2020-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921485594.4U Active CN210646831U (en) | 2019-09-09 | 2019-09-09 | Wet electrostatic precipitator positive pole module temperature and stress monitoring system |
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| Country | Link |
|---|---|
| CN (1) | CN210646831U (en) |
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- 2019-09-09 CN CN201921485594.4U patent/CN210646831U/en active Active
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