CN201885757U - Primary air and secondary air flow measurement device for circulating fluidized bed boiler - Google Patents
Primary air and secondary air flow measurement device for circulating fluidized bed boiler Download PDFInfo
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- CN201885757U CN201885757U CN2010206536556U CN201020653655U CN201885757U CN 201885757 U CN201885757 U CN 201885757U CN 2010206536556 U CN2010206536556 U CN 2010206536556U CN 201020653655 U CN201020653655 U CN 201020653655U CN 201885757 U CN201885757 U CN 201885757U
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- fluidized bed
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Abstract
The utility model discloses a primary air and secondary air flow measurement device for a circulating fluidized bed boiler, which comprises a primary air and secondary air pipe (1), Del Taba flow meters (2), pressure taking conduits (3) and a differential pressure transmitter (4), wherein the Del Taba flow meters (2) are mounted in the primary air and secondary air pipe (1); one end of one of the pressure taking conduits (3) is connected with pressure taking interfaces of the Del Taba flow meters (2), and the other end is connected with the differential pressure transmitter (4) which is connected with a control system; a plurality of Del Taba flow meters (2) are inserted in different positions of the primary air and secondary air pipe (1); and one of the pressure taking conduits (3) is connected in parallel with the pressure taking interfaces of the Del Taba flow meters (2) respectively, and then the other pressure taking conduit is connected with the differential pressure transmitter (4). With the adoption of the technical scheme, the measurement error generated by the disturbance of air in the air pipe is avoided, so that the measured value is more accurate, the production efficiently is improved, the resource waste and the environment pollution are avoided, and the production cost is reduced.
Description
Technical field
The utility model relates to a kind of flow measurement device, relates in particular to wind of a kind of Circulating Fluidized Bed Boiler, secondary air flow measurement mechanism.
Background technology
Circulating Fluidized Bed Boiler is a kind of more novel efficient height, the New-type boiler of environmental protection, the coal that acts as a fuel is blown into a wind in the stove to fluidized state in boiler, and in the loop of burner hearth and cyclone separator formation, circulate burning, secondary air is blown in the stove combustion-supporting, until perfect combustion totally, improved burning of coal efficient.Therefore for Circulating Fluidized Bed Boiler, the accurate measurement of wind, secondary air flow and accurately control is particularly important.But be subjected to the restriction of boiler body design, a wind, the common bore of secondary air airduct is more greatly about φ 1500mm, and flow development length is generally 5 ~ 6 meters, make wind flow of measurement can only use the flowmeter of differential pressure type, by taking out because of a wind, secondary air flows and the pressure difference meter that produces is calculated flow, but differential pressure flowmeter generally (is generally the preceding 7 times of bore length of flowmeter to the arm length requirement of measuring pipeline section is higher, 4 times of bore length behind the flowmeter, could guarantee that like this gas steadily passes through in pipeline, measured value could be accurate), because straight length is a wind more in short-term, the disturbance of secondary air in airduct is bigger, all be a Delta crust flowmeter to be installed take out pressure differential by the pressure probe in the past, and through calculating wind one time after the differential pressure transmitter measurement, the flow of secondary air, but because straight length deficiency, flow perturbation causes measured value inaccurate more greatly in the airduct, cause the burning control accuracy of boiler bad, finally cause the waste of fuel source and the pollution of environment, and improved production cost.
Summary of the invention
The technical problems to be solved in the utility model is: a kind of burning control accuracy of measuring accurately, can improving boiler is provided, avoids fuel source waste and environmental pollution, wind of the Circulating Fluidized Bed Boiler that reduces production costs, secondary air flow measurement mechanism.
The utility model is achieved by following technical proposals:
Wind of a kind of Circulating Fluidized Bed Boiler, the secondary air flow measurement mechanism, it comprises wind one time, the secondary air airduct, Delta crust flowmeter, pressure conduit and differential pressure transmitter, Delta crust flowmeter is installed in wind one time, in the secondary air airduct, pressure conduit one end connects the pressure interface of Delta crust flowmeter, the other end is connected with the differential pressure transmitter that links to each other with control system, at a wind, the secondary air airduct inserts Delta crust flowmeter at a distance of the 500mm position, the pressure conduit is in parallel respectively with the pressure interface that Delta clings to flow probe, is connected to differential pressure transmitter then.
As preferably, the Delta of described insertion crust flow is counted 3.
According to the technical solution of the utility model, employing is installed many Deltas crust flowmeters and is measured on wind, secondary air airduct, the disturbance of air-flow in airduct fallen with regard to conductively-closed like this, thereby make measured value more accurate, avoided the situation of and displayed value disorder inaccurate because of the air flow parameter that disturbance produces in airduct, improve production efficiency, avoided the waste of fuel source and the pollution of environment, reduced production cost; The Delta crust flow that inserts is counted 3 ~ 5, can accurately measure, and further reduces production costs again.
Description of drawings
Fig. 1 is the structural representation of wind of the utility model Circulating Fluidized Bed Boiler, secondary air flow measurement mechanism.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail.
Embodiment
As shown in Figure 1, a wind in being blown into boiler hearth of circulating fluidized bed, secondary air airduct 1 is installed 3 Delta crust flowmeters 2 at a distance of the 500mm position, and the positive pressure interface and the negative pressure interface of 3 Deltas crust flowmeter, 2 pressure joints used 3 parallel connections of pressure conduit respectively, the other end of pressure conduit 3 is connected to differential pressure transmitter 4 and carries out the measurement of pressure differential, air-flow is at a wind like this, disturbance in the secondary air airduct 1 has been fallen with regard to conductively-closed, then measuring-signal is sent to control system and calculates flow value, thereby improve the burning control accuracy of boiler, avoid the waste and the environmental pollution of fuel source, reduced production cost.
In a word, the above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to the covering scope of the utility model patent.
Claims (2)
1. wind of Circulating Fluidized Bed Boiler, the secondary air flow measurement mechanism, it comprises wind one time, secondary air airduct (1), Delta crust flowmeter (2), pressure conduit (3) and differential pressure transmitter (4), Delta crust flowmeter (2) is installed in wind one time, in the secondary air airduct (1), pressure conduit (3) one ends connect the pressure interface of Delta crust flowmeter (2), the other end is connected with the differential pressure transmitter (4) that links to each other with control system, it is characterized in that: at a wind, secondary air airduct (1) inserts Delta crust flowmeter (2) simultaneously at a distance of 500mm, pressure conduit (3) is in parallel respectively with the pressure interface that Delta clings to flow probe (2), is connected to differential pressure transmitter (4) then.
2. wind of Circulating Fluidized Bed Boiler according to claim 1, secondary air flow measurement mechanism is characterized in that: the Delta crust flowmeter (2) of insertion is 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206536556U CN201885757U (en) | 2010-12-13 | 2010-12-13 | Primary air and secondary air flow measurement device for circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206536556U CN201885757U (en) | 2010-12-13 | 2010-12-13 | Primary air and secondary air flow measurement device for circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201885757U true CN201885757U (en) | 2011-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206536556U Expired - Fee Related CN201885757U (en) | 2010-12-13 | 2010-12-13 | Primary air and secondary air flow measurement device for circulating fluidized bed boiler |
Country Status (1)
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| CN (1) | CN201885757U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162746A (en) * | 2011-12-08 | 2013-06-19 | 贵阳铝镁设计研究院有限公司 | Flow measuring device for air feeding quantity of pulverized coal boiler air feeder |
| CN103658221A (en) * | 2013-12-19 | 2014-03-26 | 江阴江顺铝型材成套设备制造有限公司 | Device for measuring pressure of air inlet of combustion chamber of hot shearing furnace |
| 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 |
-
2010
- 2010-12-13 CN CN2010206536556U patent/CN201885757U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162746A (en) * | 2011-12-08 | 2013-06-19 | 贵阳铝镁设计研究院有限公司 | Flow measuring device for air feeding quantity of pulverized coal boiler air feeder |
| CN103658221A (en) * | 2013-12-19 | 2014-03-26 | 江阴江顺铝型材成套设备制造有限公司 | Device for measuring pressure of air inlet of combustion chamber of hot shearing furnace |
| CN103658221B (en) * | 2013-12-19 | 2015-12-30 | 江阴江顺铝型材成套设备制造有限公司 | A kind of hot shearing furnace combustion chamber air inlet pressure tester |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110629 Termination date: 20141213 |
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| EXPY | Termination of patent right or utility model |