CN201137929Y - Device capable of directly measuring material bed differential pressure of fluidized bed boiler - Google Patents
Device capable of directly measuring material bed differential pressure of fluidized bed boiler Download PDFInfo
- Publication number
- CN201137929Y CN201137929Y CNU2007200736453U CN200720073645U CN201137929Y CN 201137929 Y CN201137929 Y CN 201137929Y CN U2007200736453 U CNU2007200736453 U CN U2007200736453U CN 200720073645 U CN200720073645 U CN 200720073645U CN 201137929 Y CN201137929 Y CN 201137929Y
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- differential pressure
- bed
- fluidized
- combustion boiler
- fluidized bed
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- 239000000463 material Substances 0.000 title claims abstract description 41
- 238000002485 combustion reaction Methods 0.000 claims description 33
- 238000009530 blood pressure measurement Methods 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 5
- 230000002000 scavenging effect Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 11
- 238000005243 fluidization Methods 0.000 description 7
- 239000003245 coal Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004939 coking Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009699 differential effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model relates to a measure fluidized bed boiler bed of material differential pressure device technical field. But direct measurement fluidized bed boiler bed of material differential pressure device, in proper order by the connecting pipe, first valve, differential pressure measuring instrument, the second valve that set up in fluidized bed boiler furnace dilute phase district top and set up the connecting pipe of hood root on fluidized bed boiler grid plate and constitute to through the pressure guiding pipe coupling. Utilize the utility model discloses this parameter of air distribution plate resistance need not be measured to the device, can directly measure batch layer differential pressure value for fluidized state when showing the interior thermal state of stove moves, no longer need the manual work obtain data through loaded down with trivial details calculation, provide audio-visual batch layer differential pressure data for the operation personnel. And the measuring device is simple and reliable, and the method is simple and easy.
Description
Technical field
The utility model relates to a kind of measurement fluidized-bed combustion boiler bed of material differential pressure device technical field.
Background technology
Bed of material differential pressure parameter is the most important parameters that characterizes interior fluidisation situation of fluidized-bed combustion boiler stove and thickness of feed layer.The mensuration of fluidized-bed combustion boiler bed of material differential pressure parameter all is to pass through formula at present: bed of material differential pressure (bed of material resistance)=air compartment static pressure-air distribution plate resistance (under the identical air quantity) is obtained.On CFBB air compartment, burner hearth dilute-phase zone top the wind pressure measurement point is housed all, compartment pressure and furnace pressure signal are delivered to the differential pressure value that the differential pressure measurement instrument obtains to contain the air distribution plate resistance.CFBB carries out cold test before starting, its general way is to do sky bed resistance attribute testing earlier, admission bed resistance and air quantity relation curve, use then through the bed of strictness screening and expect that the lime-ash of particle diameter below 3mm is as cold test and startup bed material, with the bed material of different-thickness for example 30,40,50,60,70cm does fluidisation respectively at the scene with a wind and tests, and notes thickness of feed layer, primary air flow, air compartment static pressure and furnace pressure difference.Observe the fluidisation situation, the critical flow wind transmission amount of the critical flow wind transmission amount of bed material of determining different-thickness bed material of different-thickness during as hot operation.The bed of material differential pressure value that records with cold conditions and the cold conditions thickness of feed layer of observation are drawn correspondence table, in order to represent moving thickness of feed layer in stove when hot.
Prior art can reference document have:
1, Feng Junkai, Yue Guangxi, Lv Junfu write.Regular higher education Tenth Five-year plan teaching material " circulation fluidized-bed combustion boiler " China Electric Power Publishing House, No. the 073590th, Chinese depository library CIP data core word (2003), p176-p181.
2, Lu Xiaofeng writes " large circulating fluidized bed boiler equipment and operation " China Electric Power Publishing House, No. the 156775th, Chinese depository library CIP data core word (2005).P240-p244。
3, Dang Lijun writes " Start-up and Adjustment of CFBB and safe operation " China Electric Power Publishing House, Chinese depository library CIP data core word (2002) younger brother No. 012583, p151-p157.
4, Lu Chunmei, Cheng Shiqing, Wang Yong assemble-publish work, " CFBB equipment and operation " China Electric Power Publishing House, 2003ISB978-7-5083-1723-6 P149-P151.
In the above-mentioned disclosed technology, according to formula with the deficiency of following several aspects is arranged with the bed of material differential pressure value that Methods of Cold-state Test obtains:
1. the data that obtain of cold test can not represent the situation when hot well, cause bed of material differential pressure measurement inaccurate. Because cold conditions The lime-ash of test usefulness is the bed material of particle diameter below 3mm through strict screening, is the 10mm with wide-size distribution during hot operation (13mm) following coal, bed material have coal that slag is arranged, the fluidization characteristic of particle diameter, density, operating temperature, material no matter, all With cold conditions have spoil in the changeable fluidized-bed combustion boiler of very big difference, particularly coal and waste incineration fluidized-bed combustion boiler, the coal, Building waste particle diameter in the rubbish is big, density is big, more can not represent with the cold test data.
2. the certainty of measurement to air quantity requires high, but it is very difficult on field condition and the measuring principle, even do not accomplish, air quantity under demarcation of cold conditions air quantity and the different temperatures is correspondent transform in good time, the air measuring error is big, the bed of material differential pressure data accumulated error of calculating by formula is big, the operations staff need calculate data in the short time, contrast with the thickness of feed layer of these data then with cold test, judge thickness of feed layer, usually forbidden to cause the fluidisation situation to worsen because the thickness of the bed of material is judged, operations staff's labour intensity is big.
3. normal in service owing to can not determine hot critical fluidisation air quantity well, for prevent in the stove fluidisation situation worsen cause the coking blowing out often a wind consumption be higher than critical flow wind transmission amount far away, secondary wind consumption is very little or do not throw, and particularly the problem that causes of boiler at low load operation is more outstanding.Primary air flow is excessive to cause combustible component content height in boiler heating surface serious wear, the returning charge, the easily coking of the high returning charge ash of material air-teturning temperature, coal consumption height, station service height, main steam condition substantial deviation rated value, the adjustment of primary and secondary air air distribution was lost force when fuel type changed, and adjusted not science, operation is uneconomical.
The utility model content
The purpose of this utility model is exactly to calculate the deficiency that bed of material differential pressure check experiment data are judged the complicated complicated processes of bed of material differential pressure in order to overcome by cold test and formula, a kind of differential pressure testing arrangement that can directly measure is provided, can directly measure bed of material differential pressure value, the foundation of science is provided for operation adjustment.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind ofly can directly measure fluidized-bed combustion boiler bed of material differential pressure device, this device is made up of the connecting pipe, first valve, differential pressure measurement instrument, second valve that are arranged on fluid bed boiler furnace dilute-phase zone top and the connecting pipe that is arranged on blast cap root above the fluidized-bed combustion boiler air distribution plate successively, and by the connection of pilot pipeline.
Above-mentioned can directly measure fluidized-bed combustion boiler bed of material differential pressure device, and preferred scheme is that the compressed air scavenging conduit also is set on the pilot pipeline, can prevent that like this connecting pipe of blast cap root in service from stopping up.
Above-mentioned can directly measure fluidized-bed combustion boiler bed of material differential pressure device, and another preferred scheme is that two or more connecting pipes are established in the different places of the blast cap root on air distribution plate, and pass through the parallel connection of pilot pipeline.
The beneficial effects of the utility model are: utilize device of the present utility model, do not need to measure this parameter of air distribution plate resistance, can directly measure bed of material differential pressure value, in order to fluidized state during hot operation in the expression stove, no longer need manually to obtain data, for the operations staff provides bed of material differential pressure data intuitively by troublesome calculation.And this measurement mechanism is simple and reliable, method is simple and easy.On the other hand, the technical scheme that the utility model is optimized promptly is provided with the compressed air scavenging conduit, has guaranteed the accuracy of the unimpeded and force value of getting of pressure pipe.
Description of drawings
To closing the drawings and specific embodiments the utility model is further specified below:
Fig. 1 of the present utility modelly can directly measure fluidized-bed combustion boiler bed of material differential pressure device, the pressure measuring system figure when measuring fluidized-bed combustion boiler bed of material differential pressure
Fig. 2 of the present utility modelly can directly measure fluidized-bed combustion boiler bed of material differential pressure device schematic diagram
Label declaration:
1, fluidized-bed combustion boiler air compartment 2, fluidized-bed combustion boiler blast cap 31 and 32, instrument valve 4, differential pressure measurement instrument
5, fluidized-bed combustion boiler steam bubble 6, fluid bed boiler furnace 7, fluidized-bed combustion boiler separator
8, be arranged on the connecting pipe of fluid bed boiler furnace dilute-phase zone top
9, be arranged on the connecting pipe of blast cap root on the fluidized-bed combustion boiler air distribution plate
10, fluidized-bed combustion boiler tradition air compartment pressure measurement position (point)
11, fluidized-bed combustion boiler dilute-phase zone top pressure point 12, fluidized-bed combustion boiler are close to blast cap root pressure point above the air distribution plate
13, compressed air scavenging conduit 14, fluidized-bed combustion boiler air distribution plate
The specific embodiment
As depicted in figs. 1 and 2, the device that can directly measure fluidized-bed combustion boiler bed of material differential pressure described in the utility model, this device is made up of the connecting pipe 8 that is arranged on fluid bed boiler furnace dilute-phase zone top, first valve 31, differential pressure measurement instrument 4, second valve 32 and the connecting pipe 9 that is arranged on blast cap root on the fluidized-bed combustion boiler aerofoil successively, and by the connection of pilot pipeline.
Be that the connecting pipe 9 prevent blast cap root in service stops up, of the present utility modelly can directly measure fluidized-bed combustion boiler bed of material differential pressure device, preferable scheme is that compressed air scavenging conduit 13 also is set on the pilot pipeline.
For solving same problem, another preferred scheme is that two or more connecting pipes (91,92) are established in the different places of blast cap root on the fluidized-bed combustion boiler air distribution plate, and by the parallel connection of wind-guiding pipeline, are connected with the differential pressure measurement instrument then.
The operation principle that can directly measure fluidized-bed combustion boiler bed of material differential pressure device described in the utility model is:
The pressure point pressure signal that is arranged on the pressure point of burner hearth dilute-phase zone and is arranged on blast cap root above the air distribution plate is delivered to the differential pressure measurement instrument through connecting pipe, instrument valve, after receiving above-mentioned two signals, differential pressure measurement gauge internal mechanical displacement or capacitance change under the pressure differential effect, change into through electric circuit that the signal of telecommunication is delivered to secondary meter or the DCS system configuration demonstrates bed of material differential pressure value.
Claims (3)
1, a kind ofly can directly measure fluidized-bed combustion boiler bed of material differential pressure device, it is characterized in that: this device is made up of the connecting pipe (8), first valve (31), differential pressure measurement instrument (4), second valve (32) that are arranged on fluid bed boiler furnace dilute-phase zone top and the connecting pipe (9) that is arranged on blast cap root above the fluidized-bed combustion boiler air distribution plate successively, and passes through the connection of pilot pipeline.
2, as claimed in claim 1ly can directly measure fluidized-bed combustion boiler bed of material differential pressure device, it is characterized in that: compressed air scavenging conduit (13) also is set on the pilot pipeline.
3, as claimed in claim 1ly can directly measure fluidized-bed combustion boiler bed of material differential pressure device, it is characterized in that: the connecting pipe (91,92) that is arranged on blast cap root above the fluidized-bed combustion boiler air distribution plate has two or more, and, be connected with the differential pressure measurement instrument then by the parallel connection of pilot pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200736453U CN201137929Y (en) | 2007-08-15 | 2007-08-15 | Device capable of directly measuring material bed differential pressure of fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200736453U CN201137929Y (en) | 2007-08-15 | 2007-08-15 | Device capable of directly measuring material bed differential pressure of fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201137929Y true CN201137929Y (en) | 2008-10-22 |
Family
ID=40038616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200736453U Expired - Fee Related CN201137929Y (en) | 2007-08-15 | 2007-08-15 | Device capable of directly measuring material bed differential pressure of fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201137929Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906536A (en) * | 2017-12-21 | 2018-04-13 | 深圳市能源环保有限公司 | A kind of control method for being used to tilt multistage reciprocal forwards waste incinerator |
-
2007
- 2007-08-15 CN CNU2007200736453U patent/CN201137929Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906536A (en) * | 2017-12-21 | 2018-04-13 | 深圳市能源环保有限公司 | A kind of control method for being used to tilt multistage reciprocal forwards waste incinerator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081022 Termination date: 20120815 |