CN2911458Y - Secondary air on-line monitoring system for boiler of power station - Google Patents
Secondary air on-line monitoring system for boiler of power station Download PDFInfo
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- CN2911458Y CN2911458Y CN 200620074237 CN200620074237U CN2911458Y CN 2911458 Y CN2911458 Y CN 2911458Y CN 200620074237 CN200620074237 CN 200620074237 CN 200620074237 U CN200620074237 U CN 200620074237U CN 2911458 Y CN2911458 Y CN 2911458Y
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Abstract
The utility model relates to an on-line monitor system for primary and secondary air speed of boiler in power plants, the utility model has the technology proposals that: the online monitor system for primary and secondary air speed of boiler in power plants comprises a monitoring mainframe and at least one speed measurement unit, wherein the output signal of each speed measurement unit is input to the monitoring mainframe, and each speed measurement unit is composed of a speed measuring device and a differential pressure transmitter; wherein the speed measuring device is composed of a total pressure tube, a static pressure tube, a pressure transmitter and a pressured connecting tube; the lower port of the two pressure tubes is positioned inside the straight tube of the air duct, the S profile of the total pressure tube is faced to the windward side of the air duct, and the static pressure tube is arranged on the back surface of the total pressure tube; the total pressure obtained from the total pressure tube and the static pressure obtained from the static pressure tube is respectively connected with the high-pressure side and low-pressure side of the differential pressure transmitter via the pressure transmitter and the pressured connecting tube, the standard signals as dynamic pressure that output from the differential pressure transmitter are transferred to the monitoring mainframe.
Description
Technical field
The utility model relates to a kind of thermal measurement and instrument and meter system, relates in particular to a kind of on-line monitoring system of station boiler one secondary wind.
Background technology
In thermal power plant's energy conversion process, boiler changes the chemical energy of fuel the heat energy of steam into, and the quality of boiler combustion operating mode is determining the economy and the security of boiler plant and the operation of whole generating factory to a great extent.
Burning optimization is the needs of boiler operatiopn security: it is improper that burning is adjusted, and can cause problems such as eccentricity of fire in the burner hearth, overlap, ignition point position are unreasonable, burner region coking, steam temperature deviation, oxygen amount deviation.Burning optimization is the requirement of boiler operatiopn economy: in the thermoelectricity cost of electricity-generating, fuel cost accounts for more than 70%, and burning optimization can reduce flue gas loss and incomplete combustion loss, thereby improves boiler operating efficiency.
To measuring accurately for a long time of wind speed, resemble to the boiler operatiopn personnel and increased " eyes " that burning is adjusted, the size of wind speed and coal powder density in each airduct of stoker personnel energy real time inspection, at any time adjust boiler first and second wind speed proportioning, wind speed can be adjusted evenly in the airduct, can allow boiler move under the operating mode of less expensive all the time.So can obviously improve combustion conditions, significantly improve boiler combustion efficiency.
Wind speed in boiler operatiopn first and second airduct of present domestic power plant lacks monitoring, mostly still adopt traditional static pressure measurement to reflect air distribution situation in the airduct, according to total blast, blower fan electric current and controllable register aperture, organize and adjust burning for powder (coal) machine rotating speed, a parameter such as wind static pressure.As everyone knows, because the size of static pressure is along with what, the variation of factors such as the aperture size of air door baffle plate and coal powder density of the length of airduct, elbow on each airduct, can become has nothing in common with each other, and the static pressure of each airduct changes quite greatly, and the height of static pressure can not directly reflect the speed of airduct wind speed.Therefore utilize the static pressure measurement instrument to be difficult to reasonably instruct boiler operatiopn, for the truly effective monitoring that quantizes not directly perceived such as the size of wind speed height, air quantity size and uniformity thereof, coal powder density and uniformity in the boiler operatiopn.
Abroad, ABB Automation and Teesside university develop jointly out a kind of static load detector of non-insertion, what adopt is a brachymemma pipe or the one section reel that inserts the fine coal conveyance conduit, and the annular sensor that is embedded on the mandrel internal surface with a row detects the alternating current load.The load that any coal grain is sensed on the antenna depends primarily on the position of coal grain in pipe.These signal combination are got up and can be calculated a flat response curve.Utilize the absolute velocity of crosscorrelation energy measurement pulverized coal particle, use precision and reach 2%.Also has some other plug-in type static flow detector also in test.SWR (Germany) has developed a kind of microwave meter, has also used this instrument in the test in the Kingsnorth power station of PowerGen.Passive acoustic sensor is measured by the pulverized coal particle motion is measured the flow of coal dust to the mensuration of the sound of the collision generation of tube wall or the sound that air agitation produces.Detection method ubiquities such as above-mentioned these static, microwave, acoustics expense costliness, calibration difficult in maintenance, difficult and the not high shortcoming of precision.
Summary of the invention
The utility model is in order to overcome the deficiencies in the prior art, a kind of accuracy of measurement height to be provided, station boiler one secondary wind on-line monitoring system cheap for manufacturing cost.
The technical scheme that realizes the present utility model purpose is: a kind of station boiler one secondary wind on-line monitoring system, comprise monitoring main frame and at least one unit that tests the speed, the output signal Input Monitor Connector main frame of each unit that tests the speed includes speed measuring device and differential pressure transmitter in each unit that tests the speed; Described speed measuring device comprises stagnation pressure pressure pipe, static pressure pressure pipe, impulse joint and pressure guiding pipe; Stagnation pressure pressure pipe is the upper end sealing, and the lower end is provided with the tubular body of S section mouth, and the top oblique cutting of stagnation pressure pressure pipe has the secondary filter chamber, an end of secondary filter chamber and stagnation pressure pressure pipe internal communication, and the other end sealing of secondary filter chamber, the secondary filter chamber is provided with the impulse joint; Static pressure pressure pipe is the tubular body of upper end sealing, bottom end opening, and the top oblique cutting of static pressure pressure pipe has the secondary filter chamber, an end of secondary filter chamber and static pressure pressure pipe internal communication, and the other end sealing of secondary filter chamber, the secondary filter chamber is provided with the impulse joint; The lower port of described two pressure pipes is located in the straight tube of airduct, and the S section mouth of stagnation pressure pressure pipe is towards the windward side of airduct, and static pressure pressure pipe is located at the back side of stagnation pressure pressure pipe; The stagnation pressure that stagnation pressure pressure pipe obtains is connected with low-pressure side with the high-pressure side of differential pressure transmitter respectively with pressure guiding pipe by the impulse joint with the static pressure that static pressure pressure pipe obtains, and the standard signal of differential pressure transmitter output expression dynamic pressure is to monitoring main frame.
In the utility model, speed measuring device adopts stagnation pressure pressure pipe and static pressure pressure pipe as holes probe, records stagnation pressure and static pressure simultaneously, and obtains real-time dynamic pressure from differential pressure 1 transmitter, and is more accurate to the measurement of wind speed.Because speed measuring device is simple in structure, the total system cost is not high, and is easy to maintenance.The design of the S section mouth of stagnation pressure pressure pipe takes into account high pressure usefulness, prevents to stop up and protect the effect of static pressure tube.The setting that is inclined upwardly of secondary filter chamber can be in the dust accumulation that prevents to avoid when dust from entering pressure guiding pipe the secondary filter chamber.
As further improvement of the utility model, outside described pressure pipe, also be provided with the high temperature alloy ceramic layer, make it have outstanding abrasionproof performance.
As further improvement of the utility model, in described pressure pipe, also be provided with anti-block apparatus, it can carry out the real-time deashing of full wall of pressure pipeline by the kinetic energy of measuring media.Being provided with of anti-block apparatus can be: have taper fork some fins, up big and down small, the upper end is connected with connecting rod is rotatable, and the lower end is provided with pendulum, and the external diameter of fork is less than the internal diameter of pressure pipe.The Techniques of Optimum scheme of anti-block apparatus is: its fork is made up of straight-bar and " 7 " type brace, and some " 7 " type brace is connected on the straight-bar, and forms taper cage body around straight-bar, and the lower end of " 7 " type brace is provided with limited block; The upper end of straight-bar is connected with connecting rod is rotatable, and the lower end of straight-bar is provided with pendulum; The taper cage body diameter of fork is less than the internal diameter of pressure pipe.
Scattered control system in the utility model can also comprise compensation arrangement and arithmetic unit, and the standard signal of the expression dynamic pressure of transmitter output can obtain the wind speed air quantity through excess temperature, pressure and other parameters compensation and mathematical operation again to monitoring main frame.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1
Fig. 2 is the structural representation that measurement mechanism is connected with airduct among the utility model embodiment 1
Fig. 3, the 4th, the structural representation of measurement mechanism among the utility model embodiment 1
Fig. 5, the 6th, the structural representation of anti-block apparatus among the utility model embodiment 1
The 1-monitoring main frame 2-unit 3-airduct 4-speed measuring device 5-stagnation pressure pressure pipe 6-static pressure pressure pipe 7-secondary filter chamber 8-impulse joint 9-pressure guiding pipe 10-anti-block apparatus 11-straight-bar 12-brace 13-fork 14-limited block 15-connecting rod 16-hook 17-pendulum 18-flange 19-transmitter that tests the speed
The specific embodiment
As shown in Figure 1, a kind of station boiler one secondary wind monitoring system comprises a monitoring main frame 1 and at least one unit 2 that tests the speed, and the output signal Input Monitor Connector main frame 1 of each unit 2 that tests the speed includes speed measuring device 4 and transmitter 19 in each unit 2 that tests the speed.
Shown in Fig. 2,3,4, speed measuring device 4 comprises stagnation pressure pressure pipe 5, static pressure pressure pipe 6, secondary filter chamber 7, impulse joint 8 and pressure guiding pipe 9; Stagnation pressure pressure pipe 5 is the upper end sealing, the lower end is provided with the tubular body of S section mouth, and the top oblique cutting of stagnation pressure pressure pipe 5 has secondary filter chamber 7, an end of secondary filter chamber and stagnation pressure pressure pipe internal communication, the other end of secondary filter chamber seals and is directed upwardly, and the secondary filter chamber is provided with impulse joint 8; Static pressure pressure pipe 6 is the tubular body of upper end sealing, bottom end opening, the top oblique cutting of static pressure pressure pipe 6 has secondary filter chamber 7, one end of secondary filter chamber 7 and static pressure pressure pipe internal communication, the other end of secondary filter chamber seals and is directed upwardly, and the secondary filter chamber is provided with impulse joint 8; In pressure pipe 5,6 tube chambers, be provided with anti-block apparatus 10; Two pressure pipe 5,6 usefulness flanges connect, and the lower port of two pressure pipes 5,6 is located in the straight tube of airduct 3, and the S section mouth of stagnation pressure pressure pipe 5 is towards the windward side of airduct, and static pressure pressure pipe 6 is located at the back side of stagnation pressure pressure pipe; Two impulse joints 8 are connected with transmitter 19 respectively by pressure guiding pipe 9, and transmitter 9 is connected with monitoring main frame 1; The static pressure that stagnation pressure pressure pipe 5 that stagnation pressure pressure pipe obtains and static pressure pressure pipe 6 obtain causes transmitter 9 by impulse head 8, and the standard signal of transmitter 9 output expression dynamic pressures is to monitoring main frame 1.
Shown in Fig. 5,6, the structure of anti-block apparatus 10 is: straight-bar 11 and " 7 " type brace 12 are formed 13, four " 7 " type braces 12 of fork and are connected on the straight-bar 11, and form taper cage body around straight-bar 11, and the lower end of " 7 " type brace 12 is provided with limited block 14; The upper end of straight-bar 11 adopts hook 16 to be connected with connecting rod 15, and the lower end of straight-bar 11 is provided with pendulum 17; The taper cage body diameter of fork is less than the internal diameter of pressure pipe 5,6.
Claims (7)
1, a kind of station boiler one secondary wind on-line monitoring system comprises monitoring main frame and at least one unit that tests the speed, and it is characterized in that the output signal Input Monitor Connector main frame of each unit that tests the speed includes speed measuring device and transmitter in each unit that tests the speed; Described speed measuring device comprises stagnation pressure pressure pipe, static pressure pressure pipe, impulse joint and pressure guiding pipe; Stagnation pressure pressure pipe is the upper end sealing, and the lower end is provided with the tubular body of S section mouth, and the top oblique cutting of stagnation pressure pressure pipe has the secondary filter chamber, an end of secondary filter chamber and stagnation pressure pressure pipe internal communication, and the other end sealing of secondary filter chamber, the secondary filter chamber is provided with the impulse joint; Static pressure pressure pipe is the tubular body of upper end sealing, bottom end opening, and the top oblique cutting of static pressure pressure pipe has the secondary filter chamber, an end of secondary filter chamber and stagnation pressure pressure pipe internal communication, and the other end sealing of secondary filter chamber, the secondary filter chamber is provided with the impulse joint; The lower port of described two pressure pipes is located in the straight tube of airduct, and the S section mouth of stagnation pressure pressure pipe is towards the windward side of airduct, and static pressure pressure pipe is located at the back side of stagnation pressure pressure pipe; The stagnation pressure that stagnation pressure pressure pipe obtains is connected with low-pressure side with the high-pressure side of differential pressure transmitter respectively with pressure guiding pipe by the impulse joint with the static pressure that static pressure pressure pipe obtains, and the standard signal of differential pressure transmitter output expression dynamic pressure is to monitoring main frame.
2, a secondary wind on-line monitoring system according to claim 1 is characterized in that, also is provided with the high temperature alloy ceramic layer outside described pressure pipe.
3, a secondary wind on-line monitoring system according to claim 1 and 2 is characterized in that, also is provided with anti-block apparatus in described pressure pipe.
4, a secondary wind monitoring system according to claim 3 is characterized in that the other end direction of two secondary filter chambers of described speed measuring device all up.
5, a secondary wind on-line monitoring system according to claim 4, it is characterized in that the setting of described anti-block apparatus is: have some fins, up big and down small taper fork, the upper end is connected with connecting rod is rotatable, the lower end is provided with pendulum, and the external diameter of fork is less than the internal diameter of pressure pipe.
6, a secondary wind on-line monitoring system according to claim 5, it is characterized in that its fork is made up of straight-bar and " 7 " type brace, four " 7 " type braces are connected on the straight-bar, and around straight-bar, forming taper cage body, the lower end of " 7 " type brace also is provided with limited block; The upper end of straight-bar adopts hook to be connected with connecting rod, and the taper cage body diameter of fork is less than the internal diameter of pressure pipe.
7, a secondary wind on-line monitoring system according to claim 6, it is characterized in that, the monitoring main frame also comprises compensation arrangement and arithmetic unit, and the standard signal of the expression dynamic pressure of transmitter output can obtain the wind speed air quantity through parametric compensation and mathematical operation again to monitoring main frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620074237 CN2911458Y (en) | 2006-06-23 | 2006-06-23 | Secondary air on-line monitoring system for boiler of power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620074237 CN2911458Y (en) | 2006-06-23 | 2006-06-23 | Secondary air on-line monitoring system for boiler of power station |
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| Publication Number | Publication Date |
|---|---|
| CN2911458Y true CN2911458Y (en) | 2007-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620074237 Expired - Fee Related CN2911458Y (en) | 2006-06-23 | 2006-06-23 | Secondary air on-line monitoring system for boiler of power station |
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| CN (1) | CN2911458Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680370A (en) * | 2012-05-21 | 2012-09-19 | 常州市新港热电有限公司 | Pulverized coal concentration online monitoring system |
| CN106093463A (en) * | 2016-06-06 | 2016-11-09 | 国网江西省电力科学研究院 | A kind of station boiler coal pulverizer outlet online leveling method of primary air velocity |
| CN108332232A (en) * | 2018-01-18 | 2018-07-27 | 北京源深节能技术有限责任公司 | Turbulent burner Secondary Air on-line measurement system |
| CN108386867A (en) * | 2018-01-18 | 2018-08-10 | 北京源深节能技术有限责任公司 | Turbulent burner Secondary Air On-line Measuring Method |
| CN109405295A (en) * | 2018-10-29 | 2019-03-01 | 华帝股份有限公司 | Pressure taking device and gas water heater or wall-mounted boiler with same |
-
2006
- 2006-06-23 CN CN 200620074237 patent/CN2911458Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680370A (en) * | 2012-05-21 | 2012-09-19 | 常州市新港热电有限公司 | Pulverized coal concentration online monitoring system |
| CN106093463A (en) * | 2016-06-06 | 2016-11-09 | 国网江西省电力科学研究院 | A kind of station boiler coal pulverizer outlet online leveling method of primary air velocity |
| CN108332232A (en) * | 2018-01-18 | 2018-07-27 | 北京源深节能技术有限责任公司 | Turbulent burner Secondary Air on-line measurement system |
| CN108386867A (en) * | 2018-01-18 | 2018-08-10 | 北京源深节能技术有限责任公司 | Turbulent burner Secondary Air On-line Measuring Method |
| CN109405295A (en) * | 2018-10-29 | 2019-03-01 | 华帝股份有限公司 | Pressure taking device and gas water heater or wall-mounted boiler with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NANJING LANGKUN SOFTWARE CO., LTD. Free format text: FORMER OWNER: NANJING LANGKUN AUTOMATIZATION CO., LTD.; PATENTEE Effective date: 20080822 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080822 Address after: World window science and technology software park, No. 12, Huai gate, Jiangsu, Nanjing Province, 210013 Patentee after: Nanjing Luculent Software Co., Ltd. Address before: World window science and technology software park, No. 12, Huai gate, Jiangsu, Nanjing Province, 210013 Co-patentee before: Nanjing Luculent Software Co., Ltd. Patentee before: Nanjing Lang Kun Automation Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070613 Termination date: 20140623 |
|
| EXPY | Termination of patent right or utility model |