CN101344259B - Ash cleaner of power boiler breeze concentration microwave measurement system - Google Patents
Ash cleaner of power boiler breeze concentration microwave measurement system Download PDFInfo
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- CN101344259B CN101344259B CN2007100250153A CN200710025015A CN101344259B CN 101344259 B CN101344259 B CN 101344259B CN 2007100250153 A CN2007100250153 A CN 2007100250153A CN 200710025015 A CN200710025015 A CN 200710025015A CN 101344259 B CN101344259 B CN 101344259B
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- coal
- chute
- compressed air
- measurement system
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Abstract
The invention discloses an ash cleaning device of a pulverized coal concentration microwave measurement system for a utility boiler. The system comprises a coal chute, a transmitter and a receiver which are arranged on both sides of the coal chute for forming a measurement area, and nozzles are arranged on opening holes on the coal chute which is near to the measurement area, compressed air blows the chute wall of the coal chute of the measurement area through the nozzles, and the blowing direction of the compressed air is the same as the flow direction of the pulverized coal in the coal chute. Two holes are opened on the coal chute of the invention for installing the nozzles, the compressed air is added in the chute through the nozzles for blowing the pulverized coal which is attached on the surface of the chute wall, the blowing direction of the compressed air is the same as the flow direction of the pulverized coal, and the flow rate of the compressed air is larger than one-time wind speed, thereby eliminating the impact of the pulverized coal which is attached on the chute wall, improving the precision of the microwave measurement and having simple structure.
Description
One technical field
The invention belongs to the deashing device of multiphase flow measurement technology, particularly breeze concentration microwave measurement system of power station boiler.
Two background technologies
In the measuring method of power boiler breeze concentration, microwave measuring method becomes research emphasis with its exclusive certainty of measurement height, advantage such as real-time, easy for installation.Microwave transmits and receives device and generally all realizes by electromagnetic horn or probe, and it is outer that electromagnetic horn is placed on coal chute, and probe is placed in the pipe.What flow in the coal chute is coal dust and AIR MIXTURES, and coal dust is the structure of a kind of many porosities of surface grain, has stronger adhesion strength, is easier to be attached to the inside pipe wall face.And the primary air velocity in the pipe is higher, generally more than 15m/s, this higher wind speed is the continuous scavenging conduit internal face of meeting in the process of pulverized coal conveying, make the coal dust that is attached on the wall be unlikely to too much, but be attached on coal dust on the tube wall face owing to can not purge all fully, remaining in this a part of coal dust of tube wall can exert an influence to microwave measurement, can increase measure error.
Three summary of the invention
The object of the present invention is to provide a kind of simple in structurely, can eliminate the influence of the sticking coal dust of tube wall, and improve the deashing device of the breeze concentration microwave measurement system of power station boiler of microwave measurement precision.
Realize that the object of the invention technical solution is: a kind of deashing device of breeze concentration microwave measurement system of power station boiler, comprise coal chute, transmitter and receiver are arranged on the coal chute both sides and form measured zone, near perforate on the coal chute of this measured zone spout is being set, compressed air purges the coal chute tube wall of measured zone by this spout, and the mobile direction of compressed-air actuated purging direction and the coal dust in the coal chute is identical.
The deashing device of breeze concentration microwave measurement system of power station boiler of the present invention, the size of spout is decided according to the width of measured zone, can purge the coal chute tube wall of measured zone fully from the compressed air of spout spirt.
The present invention compared with prior art, its remarkable advantage is: open two holes on coal chute spout is installed, in pipe, add the compression air by spout, the coal dust that the scavenging conduit wall sticks, compressed-air actuated purging direction is identical with the coal dust flow direction, and velocity of compressed air is greater than primary air velocity, thereby the influence of the sticking coal dust of elimination tube wall, improved the precision of microwave measurement, and simple in structure, and application prospect is extensive.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Four description of drawings
Accompanying drawing is the structural representation of the deashing device of breeze concentration microwave measurement system of power station boiler of the present invention.
Five specific embodiment
In conjunction with the accompanying drawings, the deashing device of breeze concentration microwave measurement system of power station boiler of the present invention, comprise coal chute 4, transmitter and receiver shift to install at coal chute 4 both sides formation measured zone 3a, 3b, near on the coal chute 4 of this measured zone 3a, 3b spout 1a, 1b are being set, compressed air 2a, 2b purge the coal chute tube wall of measured zone 3a, 3b by this spout 1a, 1b, and the mobile direction of the purging direction of compressed air 2a, 2b and the coal dust in the coal chute 4 is identical.In the measuring process of the coal dust in coal chute 4, pass through a side measured zone 3a, 3b by the microwave signal transmission of transmitter and receiver, absorbed by coal dust, the measured zone of passing opposite side again is received. Compressed air 2a, 2b add by spout 1a, the 1b that is installed on the coal chute 4, and purge the measurement zone tube wall along the direction of arrow, and the direction that coal dust 5 flowed in it purged direction and manages is identical, prevent that the coal dust 5 that flows from stopping up spout.The size of spout 1a, 1b is decided according to the width of measured zone, and basic demand is the inner tubal wall that can purge measured zone 3a, 3b from compressed air 2a, the 2b of spout 1a, 1b spirt fully, and the flow velocity of compressed air 2a, 2b is greater than primary air velocity.
Claims (3)
1. the deashing device of a breeze concentration microwave measurement system of power station boiler, comprise coal chute [4], it is characterized in that: transmitter and receiver are arranged on coal chute [4] both sides and form measured zone [3a, 3b], at close this measured zone [3a, 3b] coal chute [4] go up perforate spout [1a be set, 1b], by this spout [1a, 1b] compressed air [2a, 2b] purge the coal chute tube wall of measured zone [3a, 3b], the direction that coal dust [5] in the purging direction of this compressed air [2a, 2b] and the coal chute [4] flows is identical.
2. the deashing device of breeze concentration microwave measurement system of power station boiler according to claim 1, it is characterized in that: spout [1a, 1b] size decide according to the width of measured zone, from spout [1a, 1b] compressed air [2a of spirt, 2b] can purge the coal chute tube wall of measured zone [3a, 3b] fully.
3. the deashing device of breeze concentration microwave measurement system of power station boiler according to claim 1 and 2, it is characterized in that: the flow velocity of compressed air [2a, 2b] is greater than primary air velocity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100250153A CN101344259B (en) | 2007-07-10 | 2007-07-10 | Ash cleaner of power boiler breeze concentration microwave measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100250153A CN101344259B (en) | 2007-07-10 | 2007-07-10 | Ash cleaner of power boiler breeze concentration microwave measurement system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101344259A CN101344259A (en) | 2009-01-14 |
| CN101344259B true CN101344259B (en) | 2010-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100250153A Expired - Fee Related CN101344259B (en) | 2007-07-10 | 2007-07-10 | Ash cleaner of power boiler breeze concentration microwave measurement system |
Country Status (1)
| Country | Link |
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| CN (1) | CN101344259B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1541419A (en) * | 1976-04-13 | 1979-02-28 | Spillers Ltd | Devices for measuring flow rate of particulate material |
| US4423623A (en) * | 1981-08-24 | 1984-01-03 | Rockwell International Corporation | Microwave meter for fluid mixtures |
| CN1055596A (en) * | 1990-03-31 | 1991-10-23 | 赵松茂 | Multiple-prupose microwave duff flowmeter |
| DE4426280A1 (en) * | 1994-07-25 | 1996-02-01 | Reich Ernst | Measuring concentration of solid particles in gas esp. for controlling administration of coal dust in coal-powered power station |
| US6009760A (en) * | 1997-07-04 | 2000-01-04 | Valmet Automation Inc. | Method of measuring flow, and flow meter |
| CN2746277Y (en) * | 2004-06-22 | 2005-12-14 | 祁振铎 | Apparatus for removing ash on slope wall of boiler |
-
2007
- 2007-07-10 CN CN2007100250153A patent/CN101344259B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1541419A (en) * | 1976-04-13 | 1979-02-28 | Spillers Ltd | Devices for measuring flow rate of particulate material |
| US4423623A (en) * | 1981-08-24 | 1984-01-03 | Rockwell International Corporation | Microwave meter for fluid mixtures |
| CN1055596A (en) * | 1990-03-31 | 1991-10-23 | 赵松茂 | Multiple-prupose microwave duff flowmeter |
| DE4426280A1 (en) * | 1994-07-25 | 1996-02-01 | Reich Ernst | Measuring concentration of solid particles in gas esp. for controlling administration of coal dust in coal-powered power station |
| US6009760A (en) * | 1997-07-04 | 2000-01-04 | Valmet Automation Inc. | Method of measuring flow, and flow meter |
| CN2746277Y (en) * | 2004-06-22 | 2005-12-14 | 祁振铎 | Apparatus for removing ash on slope wall of boiler |
Non-Patent Citations (8)
| Title |
|---|
| US 4423623 A,全文. |
| US 6009760 A,全文. |
| 刘定平.火电厂中一次风煤粉浓度测量技术分析.广东电力16 3.2003,16(3),4-7. |
| 刘定平.火电厂中一次风煤粉浓度测量技术分析.广东电力16 3.2003,16(3),4-7. * |
| 尹静，杨兴森，王家新，李占宝.一次风煤粉浓度的测量方法.山东电力技术 总第128.2002,(总第128),3-5. |
| 尹静,杨兴森,王家新,李占宝.一次风煤粉浓度的测量方法.山东电力技术 总第128.2002,(总第128),3-5. * |
| 崔晓钢，陈鸿伟，李永华.煤粉浓度测量方法研究.仪器仪表学报24 4期增刊.2003,24(4期增刊),525-527. |
| 崔晓钢,陈鸿伟,李永华.煤粉浓度测量方法研究.仪器仪表学报24 4期增刊.2003,24(4期增刊),525-527. * |
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| Publication number | Publication date |
|---|---|
| CN101344259A (en) | 2009-01-14 |
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Granted publication date: 20101013 Termination date: 20110710 |