CN210530991U - Combustion pulsation pressure on-line monitoring device adopting ultra-long distance cooling copper pipe - Google Patents
Combustion pulsation pressure on-line monitoring device adopting ultra-long distance cooling copper pipe Download PDFInfo
- Publication number
- CN210530991U CN210530991U CN201921223032.2U CN201921223032U CN210530991U CN 210530991 U CN210530991 U CN 210530991U CN 201921223032 U CN201921223032 U CN 201921223032U CN 210530991 U CN210530991 U CN 210530991U
- Authority
- CN
- China
- Prior art keywords
- pressure
- pipe
- cooling copper
- copper pipe
- pressure guide
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a combustion pulsating pressure on-line monitoring device arranged on a long-distance cooling copper pipe, which comprises a pressure guide pipe, a pressure guide pipe interface box, a first cooling copper pipe, a second cooling copper pipe, a pressure sensor, a high-pressure nitrogen cylinder, an amplifier and an acquisition instrument; one end of the pressure guide pipe is communicated with a combustion chamber, namely a flame tube, of an environment to be measured through a pressure guide hole, the other end of the pressure guide pipe is connected with a pressure guide pipe interface box, a first cooling copper pipe which is coiled is arranged in the pressure guide pipe interface box, one end of the first cooling copper pipe is connected with the pressure guide pipe, the other end of the first cooling copper pipe extends out of the pressure guide pipe interface box to form a second cooling copper pipe, and the tail end of the second cooling copper pipe is closed; the second cooling copper pipe is sequentially connected with a pressure sensor and a high-pressure nitrogen cylinder, and the output end of the pressure sensor is sequentially connected with an amplifier and an acquisition instrument.
Description
Technical Field
The utility model discloses be applied to 9E gas generating set combustion monitoring and adjustment, especially relate to the pulsating pressure on-line monitoring device of burning that adopts super long distance cooling copper pipe to set up.
Background
At present, when a unit is used for combustion adjustment, a whole set of imported data acquisition system and data analysis software are required to be transported to the site from abroad, the price is high, related equipment must be shut down and installed, and the unit is shut down and disassembled after adjustment is finished, so that time and labor are wasted.
After the combustion adjustment is finished, the combustion condition can be adjusted to a satisfactory interval under the site condition of the power plant at that time, the unit can run for a long time, the site climate condition is changeable in four seasons, the combustion heat value is also changed at any time, the combustion working point is possibly deviated from a stable area, the unit discharge is possibly not up to standard, larger combustion pulsation is possibly generated, and potential safety hazards exist. A continuous monitoring system CEMS for smoke emission is installed on the domestic existing unit according to the environmental protection requirement, continuous online monitoring for combustion stability is not realized for monitoring combustion pulsation, and the continuous monitoring system can be additionally installed on the existing unit so as to facilitate autonomous combustion adjustment work at any time in the future.
The combustion stability monitoring is the basis for carrying out DLN combustion adjustment and controlling unstable combustion hazard, and the combustion pressure pulsation is an important parameter for reflecting the combustion stability, so that a combustion pressure pulsation signal is firstly collected when the combustion stability monitoring is carried out. Because the temperature of the wall of the combustion cylinder is higher, a pressure transmitter can not be directly installed for measurement generally, but a pressure guide pipe is installed, and a dynamic piezoelectric pressure sensor with high frequency response is installed at the pressure guide pipe, so that the temperature of the working environment of the piezoelectric dynamic pressure sensor is reduced.
The pressure guide pipe adopts the principle of an acoustic semi-infinite long pipe, one end of the pressure guide pipe is communicated with the combustion chamber of the environment to be measured through a pressure guide hole, and the other end of the pressure guide pipe is closed. The pressure sensor is installed on the pressure guiding pipe, the sound wave is gradually attenuated when propagating in the pressure guiding pipe, and the pressure guiding pipe needs to be long enough to avoid the influence of the sound wave reflected by the tail end of the pressure guiding pipe on the sound wave at the position of the sensor.
After a combustion pressure pulsation signal acquired by a pressure sensor is sent to a data acquisition device with a transient data acquisition function, corresponding data are transmitted to upper computer data analysis and processing software, a frequency spectrum analysis tool is used for recording and analyzing the characteristic frequency, amplitude and the like of combustion pressure pulsation and refreshing and displaying the characteristic frequency, amplitude and the like in real time, and technicians in a power plant are helped to judge the combustion stability. For example, patent CN201510325467.8 discloses a correction method for measuring the dynamic pressure in the combustion chamber by using a pressure-guiding tube. It is derived from a mathematical formula that the longer the path of the combustion pressure pulsation signal, the more realistic the detection effect, so it proposes a concept of "acoustic semi-infinite pipe" and gives a simple physical simulation thereof: the pressure guiding pipe is infinitely long.
However, in the actual use process, the physical model still has roughness and lacks the value of actual operation.
Therefore, the online monitoring device for the combustion pulsating pressure, which is based on the theory, has practical application value, can be matched with the infinite physical meaning of the pressure guiding pipe, and can be actually produced and installed, needs to be designed and developed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve above-mentioned problem, provide one kind based on "draw and press the pipe infinitely long", have practical application and worth, can with draw and press the physics meaning assorted of the pipe infinitely long, can actually produce the pulsating pressure on-line monitoring device of burning of installation.
In order to achieve the above object, the utility model provides a following technical scheme: the combustion pulsating pressure on-line monitoring device arranged on the long-distance cooling copper pipe comprises a pressure guide pipe, a pressure guide pipe interface box, a first cooling copper pipe, a second cooling copper pipe, a pressure sensor, a high-pressure nitrogen cylinder, an amplifier and an acquisition instrument; one end of the pressure guide pipe is communicated with a combustion chamber, namely a flame tube, of an environment to be measured through a pressure guide hole, the other end of the pressure guide pipe is connected with a pressure guide pipe interface box, a first cooling copper pipe which is coiled is arranged in the pressure guide pipe interface box, one end of the first cooling copper pipe is connected with the pressure guide pipe, the other end of the first cooling copper pipe extends out of the pressure guide pipe interface box to form a second cooling copper pipe, and the tail end of the second cooling copper pipe is closed; and the second cooling copper pipe is sequentially connected with a pressure sensor and a high-pressure nitrogen cylinder, and the output end of the pressure sensor is sequentially connected with an amplifier and an acquisition instrument.
Preferably, the length of the first cooling copper pipe is 20-100 meters.
Preferably, the length of the first cooling copper pipe is 30-50 meters.
Preferably, the pressure guiding pipe comprises a straight pipe section, a signal generator, a loudspeaker and a loudspeaker fixing box body, one end of the straight pipe section is in sealing butt joint with an opening of the loudspeaker fixing box body through a transition section, the loudspeaker faces the straight pipe section and is installed in the loudspeaker fixing box body, the signal generator is connected with the loudspeaker, the pressure guiding pipe is communicated with the straight pipe section from the pipe wall of the straight pipe section, and the dynamic pressure sensor is installed on the pipe wall of the straight pipe section.
The combustion stability monitoring is the basis for carrying out DLN combustion adjustment and controlling unstable combustion hazard, and the combustion pressure pulsation is an important parameter for reflecting the combustion stability, so that a combustion pressure pulsation signal is firstly collected when the combustion stability monitoring is carried out. Because the temperature of the wall of the combustion cylinder is higher, a pressure transmitter can not be directly installed for measurement generally, but a pressure guide pipe is installed, and a dynamic piezoelectric pressure sensor with high frequency response is installed at the pressure guide pipe, so that the temperature of the working environment of the piezoelectric dynamic pressure sensor is reduced.
The pressure guide pipe adopts the principle of an acoustic semi-infinite long pipe, one end of the pressure guide pipe is communicated with the combustion chamber of the environment to be measured through a pressure guide hole, and the other end of the pressure guide pipe is closed. The pressure sensor is installed on the pressure guiding pipe, the sound wave is gradually attenuated when propagating in the pressure guiding pipe, and the pressure guiding pipe needs to be long enough to avoid the influence of the sound wave reflected by the tail end of the pressure guiding pipe on the sound wave at the position of the sensor.
After a combustion pressure pulsation signal acquired by a pressure sensor is sent to a data acquisition device with a transient data acquisition function, corresponding data are transmitted to upper computer data analysis and processing software, a frequency spectrum analysis tool is used for recording and analyzing the characteristic frequency, amplitude and the like of combustion pressure pulsation and refreshing and displaying the characteristic frequency, amplitude and the like in real time, and technicians in a power plant are helped to judge the combustion stability.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of a pressure guiding pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the combustion pulsating pressure on-line monitoring device provided with the long-distance cooling copper pipe comprises a pressure pipe 2, a pressure pipe interface box 3, a first cooling copper pipe (not shown in the figure), second cooling copper pipes 4 and 7, a pressure sensor 6, a high-pressure nitrogen cylinder 5, an amplifier 8 and an acquisition instrument (not shown in the figure); one end of the pressure guide pipe 2 is communicated with a combustion chamber of an environment to be measured, namely a flame tube 1, through a pressure guide hole, the other end of the pressure guide pipe is connected with a pressure guide pipe interface box 3, a first cooling copper pipe which is coiled is arranged in the pressure guide pipe interface box 3, one end of the first cooling copper pipe is connected with the pressure guide pipe 2, the other end of the first cooling copper pipe extends out of the pressure guide pipe interface box 3 to form second cooling copper pipes 4 and 7, and the tail end 7 of the second cooling copper pipe is sealed; and the second cooling copper pipes 4 and 7 are sequentially connected with a pressure sensor 6 and a high-pressure nitrogen cylinder 5, and the output end of the pressure sensor 6 is sequentially connected with an amplifier 8 and an acquisition instrument. The distance between the first cooling copper pipes is 30-50 meters.
The pressure guide pipe comprises a straight pipe section, a signal generator, a loudspeaker and a loudspeaker fixing box body, wherein one end of the straight pipe section is in sealed butt joint with an opening of the loudspeaker fixing box body through a transition section, the loudspeaker faces the straight pipe section and is installed in the loudspeaker fixing box body, the signal generator is connected with the loudspeaker, and the pressure guide pipe is communicated with the straight pipe section from the pipe wall of the straight pipe section. The working mode can be seen in CN201510325467.8, and the correction method for measuring the dynamic pressure in the combustion chamber by adopting the pressure guide pipe is discussed in detail.
The technical personnel of my department are in the distance of Beijing Kogyo, the existing SY4000 product can be slightly changed and adjusted (a signal conditioning circuit is modified to receive signals of a high-frequency wanted dynamic pressure sensor, and a display picture of an upper computer is modified to adapt to synchronous refreshing display of pressure pulsation signals of 14 combustion chambers of an on-site unit), the existing imported data acquisition and analysis system can be replaced, meanwhile, a dynamic pressure sensor with a proper parameter level (the existing sensor with the same type or the dynamic pressure sensor with the same parameter of other brands) is selected, the whole set of continuous combustion pressure pulsation monitoring system is completed in on-site construction, the combustion stability data of the combustion chambers can be monitored on line in real time, and obstacles are removed for automatically developing low-nitrogen combustion adjustment work in the. Because the combustion equipment parts are aged, and the operation of the unit is influenced by external factors for a period of time, the combustion adjustment is needed, and the whole set of equipment needs to be transported from abroad every adjustment, so that the time and the labor are wasted, and the combustion pulsation condition cannot be continuously monitored.
Claims (4)
1. The combustion pulsating pressure on-line monitoring device arranged on the long-distance cooling copper pipe comprises a pressure guide pipe, a pressure guide pipe interface box, a first cooling copper pipe, a second cooling copper pipe, a pressure sensor, a high-pressure nitrogen cylinder, an amplifier and an acquisition instrument; one end of the pressure guide pipe is communicated with a combustion chamber, namely a flame tube, of an environment to be measured through a pressure guide hole, the other end of the pressure guide pipe is connected with a pressure guide pipe interface box, a first cooling copper pipe which is coiled is arranged in the pressure guide pipe interface box, one end of the first cooling copper pipe is connected with the pressure guide pipe, the other end of the first cooling copper pipe extends out of the pressure guide pipe interface box to form a second cooling copper pipe, and the tail end of the second cooling copper pipe is closed; and the second cooling copper pipe is sequentially connected with a pressure sensor and a high-pressure nitrogen cylinder, and the output end of the pressure sensor is sequentially connected with an amplifier and an acquisition instrument.
2. The on-line monitoring device for the combustion pulsation pressure of the long-distance cooling copper pipe according to claim 1, wherein: the length of the first cooling copper pipe is 20-100 meters.
3. The on-line monitoring device for the combustion pulsation pressure of the long-distance cooling copper pipe according to claim 1, wherein: the length of the first cooling copper pipe is 30-50 meters.
4. The on-line monitoring device for combustion pulsation pressure provided by the long-distance cooling copper pipe according to any one of claims 1 to 3, wherein: the pressure guide pipe comprises a straight pipe section, a signal generator, a loudspeaker and a loudspeaker fixing box body, wherein one end of the straight pipe section is in sealed butt joint with an opening of the loudspeaker fixing box body through a transition section, the loudspeaker faces the straight pipe section and is installed in the loudspeaker fixing box body, the signal generator is connected with the loudspeaker, the pressure guide pipe is communicated with the straight pipe section from the pipe wall of the straight pipe section, and the dynamic pressure sensor is installed on the pipe wall of the straight pipe section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921223032.2U CN210530991U (en) | 2019-07-31 | 2019-07-31 | Combustion pulsation pressure on-line monitoring device adopting ultra-long distance cooling copper pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921223032.2U CN210530991U (en) | 2019-07-31 | 2019-07-31 | Combustion pulsation pressure on-line monitoring device adopting ultra-long distance cooling copper pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210530991U true CN210530991U (en) | 2020-05-15 |
Family
ID=70600618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921223032.2U Expired - Fee Related CN210530991U (en) | 2019-07-31 | 2019-07-31 | Combustion pulsation pressure on-line monitoring device adopting ultra-long distance cooling copper pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210530991U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562082A (en) * | 2020-05-22 | 2020-08-21 | 北京中科宇航技术有限公司 | Unsteady state pulsating pressure test system under high temperature environment |
-
2019
- 2019-07-31 CN CN201921223032.2U patent/CN210530991U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562082A (en) * | 2020-05-22 | 2020-08-21 | 北京中科宇航技术有限公司 | Unsteady state pulsating pressure test system under high temperature environment |
| CN111562082B (en) * | 2020-05-22 | 2022-02-22 | 北京中科宇航技术有限公司 | Unsteady state pulsating pressure test system under high temperature environment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108758354B (en) | Heat supply pipeline leakage detection system and method based on infrasonic wave and reference point | |
| CN102507404B (en) | Online measurement system and measurement method of solid phase concentration of gas-solid two-phase flow | |
| CN103247358B (en) | Nuclear power station high energy pipeline local leakage monitoring test stand | |
| EP1080349B1 (en) | Fluid temperature measurement | |
| CN210530991U (en) | Combustion pulsation pressure on-line monitoring device adopting ultra-long distance cooling copper pipe | |
| CN211717716U (en) | 660MW thermal power generating unit drain valve leakage monitoring system | |
| CN104792404A (en) | Method and system for measuring natural frequencies of pipelines | |
| CN203716957U (en) | Subsonic wave water source well liquid level tester | |
| Li et al. | Leakage simulation and acoustic characteristics based on acoustic logging by ultrasonic detection | |
| CN116990543A (en) | Multichannel ultrasonic speed measuring device and speed measuring method | |
| CN208474956U (en) | Heat supply pipeline leak detection system based on infrasound and reference point | |
| CN203732109U (en) | Cortex M3 core processor based air flow measuring circuit | |
| CN108132094B (en) | Distributed optical fiber vibration sensing device and method based on pulsed light | |
| CN204027607U (en) | Vortex precession flowmeter | |
| CN202770855U (en) | Monitoring system for boiler furnace flue gas velocity based on acoustics | |
| CN206563552U (en) | A kind of distributed landslide depth displacement real-time monitoring device | |
| CN217109177U (en) | Pipeline leakage point positioning experiment system based on acoustic active excitation | |
| CN109404734A (en) | Natural gas line leak detection systems based on fiber grating | |
| KR20110060632A (en) | Acoustics and vibration complex sensing unit for defect of plant and defect diagnostics system for high pressure pipe | |
| CN204301771U (en) | Four parameter smoke discharge amount detectors | |
| Dindorf et al. | Automatic device for indirect measurement of leakage flow rate in compressed air pipeline | |
| CN206960643U (en) | Detection very low frequencies magnetic signal alignment system in long-distance oil ＆ gas pipeline | |
| CN201628617U (en) | Leakage positioning system of pressure-bearing pipe of planar quaternionic array power-station boiler | |
| CN202769634U (en) | Power station boiler thermal expansion monitoring system based on acoustical principles | |
| CN206818327U (en) | A kind of boiler furnace smoke temperature measurement device based on ultrasonic wave |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200515 |