CN202649085U - Coal powder density online monitoring system - Google Patents
Coal powder density online monitoring system Download PDFInfo
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- CN202649085U CN202649085U CN 201220227844 CN201220227844U CN202649085U CN 202649085 U CN202649085 U CN 202649085U CN 201220227844 CN201220227844 CN 201220227844 CN 201220227844 U CN201220227844 U CN 201220227844U CN 202649085 U CN202649085 U CN 202649085U
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- coal powder
- powder density
- monitoring system
- line monitoring
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Abstract
The utility model discloses a coal powder density online monitoring system which comprises a controlling cabinet and a measuring device, wherein the measuring device is installed on air pipes connected with a furnace, and an output end of the measuring device is connected with the controlling cabinet. The measuring device comprises measuring probes and a differential pressure transmitter. The measuring probes comprise a primary air speed probe and a primary density probe installed on a primary air pipe, a secondary air speed probe and a secondary density probe installed on a secondary air pipe, and a tertiary air speed probe and a tertiary density probe installed on a tertiary air pipe. The measuring probes are connected with the differential pressure transmitter through a pressure transmitting pipe. According to the manner, the coal powder density online monitoring system is strong in capacity of resisting disturbance and stable in signals, can provide the wind speed and the coal powder density of the furnace precisely, is sensitive in reacting to the changes of the coal powder density and the wind speed, is high in reliability, high in accuracy of measuring data, and is wide in the scope of application.
Description
Technical field
The utility model relates to the thermoelectric measurement field, particularly relates to a kind of coal powder density on-line monitoring system.
Background technology
Because the drag characteristic of each pulverized coal feed pipe is different in the boiler milling system, the problems such as coal pulverizer outlet coal dust and air distributing uniformity are poor, can cause the boiler wind powder lack of homogeneity, cause burner hearth internal combustion deflection, produce the problems such as slagging scorification, the deterioration of stove internal combustion operating mode, unburned carbon in flue dust height.
Along with the attention of country to environmental protection; the discharge capacity of oxides of nitrogen draws attention day by day; if reliably concentration of pulverized coal and air quantity do not monitor means accurately; can't effectively control the excess air coefficient of each burner outlet in the stove; optimize and revise the stove internal combustion, do not reach the purpose of high-efficient low polluting combustion.
The utility model content
The technical matters that the utility model mainly solves provides a kind of coal powder density on-line monitoring system, wind speed and the coal powder density of boiler can accurately be provided, to the reliability height that is quick on the draw of coal powder density and wind speed variation, the measurement data accuracy is high, has wide range of applications.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of coal powder density on-line monitoring system is provided, comprise: switch board and measurement mechanism, on the airduct that measurement mechanism is installed in boiler is connected, the output terminal of measurement mechanism is connected with switch board, measurement mechanism comprises measuring sonde and differential pressure transmitter, measuring sonde comprises that being installed in primary air velocity probe and the concentration on the airduct pops one's head in, be installed in secondary wind speed probe and secondary concentration probe on the secondary air channel, be installed in tertiary air speed probe and three concentration probes on the tertiary-air pipe, measuring sonde connects differential pressure transmitter by pressure tube.
In preferred embodiment of the utility model, be provided with the metrical information processing unit in the described switch board, the metrical information processing unit comprises filtration module, amplification module and the computing module that connects successively.
In preferred embodiment of the utility model, described switch board surface is provided with metrical information display screen, alarm, inquire button and query display screen.
In preferred embodiment of the utility model, described primary air velocity probe and tertiary air speed probe are Dual-Phrase Distribution of Gas olid gas phase flow velocity measuring sonde.
In preferred embodiment of the utility model, be provided with anti-blocking stopper on the described Dual-Phrase Distribution of Gas olid gas phase flow velocity measuring sonde.
In preferred embodiment of the utility model, described secondary wind speed probe comprises stagnation pressure probe and voltage stabilizing probe.
In preferred embodiment of the utility model, be provided with coal dust shrinkage cavity or pulverized coal distributor between described boiler and the airduct.
In preferred embodiment of the utility model, be provided with a plurality of bifurcated pipes on the described pulverized coal distributor, be connected with a plurality of airducts respectively.
The beneficial effects of the utility model are: the utility model coal powder density on-line monitoring system antijamming capability is strong, signal stabilization can accurately provide wind speed and the coal powder density of boiler, the reliability height that is quick on the draw that coal powder density and wind speed are changed, the measurement data accuracy is high, has wide range of applications.
Description of drawings
Fig. 1 is the structural representation of the utility model coal powder density on-line monitoring system one preferred embodiment;
Fig. 2 is the structural representation of the switch board internal measurement information process unit of the utility model coal powder density on-line monitoring system;
The mark of each parts is as follows in the accompanying drawing: 1, switch board, 2, measurement mechanism, 31, airducts, 32, secondary air channel, 33, tertiary-air pipe, 41, primary air velocity probe, 42, concentration probes, 43, the secondary wind speed probe, 44, secondary concentration probe, 45, tertiary air speed probe, 46, three concentration probes, 5, differential pressure transmitter, 6, metrical information processing unit, 61, filtration module, 62, amplification module, 63, computing module, 7, metrical information display screen, 8, alarm, 9, inquire button, 10, the query display screen.
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that protection domain of the present utility model is made more explicit defining.
See also Fig. 1 to Fig. 2, the utility model embodiment comprises:
A kind of coal powder density on-line monitoring system, comprise: switch board 1 and measurement mechanism 2, on the airduct that measurement mechanism 2 is installed in boiler is connected, the output terminal of measurement mechanism 2 is connected with switch board 1, measurement mechanism 2 comprises measuring sonde and differential pressure transmitter 5, and measuring sonde connects differential pressure transmitter 5 by pressure tube.
Wherein, measuring sonde comprises and is installed in 41 and concentration probes 42 of a primary air velocity probe on the airduct 31, is installed in secondary wind speed probe 43 and secondary concentration probe 44 on the secondary air channel 32, is installed in 45 and three the concentration probes 46 of tertiary air speed probe on the tertiary-air pipe 33.
Described primary air velocity probe 41 and tertiary air speed probe 45 are Dual-Phrase Distribution of Gas olid gas phase flow velocity measuring sonde, and this measuring sonde adopts wear-resistant ceramic manufacturing, have prevented the measuring sonde wearing and tearing and the calibration coefficient that causes changes, and have improved the precision of measuring.
Be provided with anti-blocking stopper on the described Dual-Phrase Distribution of Gas olid gas phase flow velocity measuring sonde, can prevent the inner obstruction of probe pipe.Also adopt flexiblely from the deashing rod on the probe, can automatic cleaning be attached to the dust of probe inside pipe wall, do not need to purge, more simple and convenient.
The measurement of secondary wind speed is adopted the pitot tube of demarcating to be installed in the secondary air channel and is realized that the dynamic pressure that records is introduced differential pressure transmitter by pressure tube.
The measurement of secondary wind speed is measured flow velocity according to multiple spot, automatic average principle, namely measures stagnation pressure and the voltage stabilizing of fluid, gets the dynamic pressure value.Described secondary wind speed probe 43 comprises that stagnation pressure probe and voltage stabilizing pop one's head in, and pressure that can each probe of automatic average.
Be provided with metrical information processing unit 6 in the described switch board 1, metrical information processing unit 6 comprises filtration module 61, amplification module 62 and the computing module 63 that connects successively.The information entering signal processing unit 6 that wind speed probe and concentration probe are collected successively by the processing of filtration module 61, amplification module 62 and computing module 63, then carries out measurement result and shows.
Described switch board 1 surface is provided with metrical information display screen 7, alarm 8, inquire button 9 and query display screen 10.Metrical information display screen 7 can pass through coal powder density and the wind speed that the forms such as bar graph, numeral or trend curve show airduct.When wind speed or coal powder density surpass critical value, alarm 8 work alarms, or stop up, report to the police when coal dust interrupts at airduct.Inquire button 9 and query display screen 10 can be inquired about and shows alarm logging and historical measurement data.
In the utility model, be provided with coal dust shrinkage cavity or pulverized coal distributor between described boiler and the airduct, be provided with a plurality of bifurcated pipes on the pulverized coal distributor, be connected with a plurality of airducts respectively, it can regulate wind speed and coal powder density distributes, and realizes the mean allocation of coal powder density.
In the utility model, the process of coal powder density on-line monitoring is:
In airduct, air is carried coal dust secretly, forming Dual-Phrase Distribution of Gas olid flows in thin-walled airduct made of iron, utilize the probe excitation principle of Dual-Phrase Distribution of Gas olid gas phase flow velocity measuring sonde to make Electromagnetic Wave Propagation, detect again, then owing to the existence of Dual-Phrase Distribution of Gas olid, the variation of decay and other characteristics occurs in electromagnetic wave, and detected value is compared with input value and obtained correct solid concentration value.
The beneficial effect of the utility model coal powder density on-line monitoring system is:
Antijamming capability is strong, and signal stabilization can accurately provide wind speed and the coal powder density of boiler, and to the reliability height that is quick on the draw that coal powder density and wind speed change, the measurement data accuracy is high, has wide range of applications.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (8)
1. coal powder density on-line monitoring system, it is characterized in that, comprise: switch board and measurement mechanism, on the airduct that measurement mechanism is installed in boiler is connected, the output terminal of measurement mechanism is connected with switch board, measurement mechanism comprises measuring sonde and differential pressure transmitter, measuring sonde comprise be installed in one time on the airduct primary air velocity probe and concentration probe, be installed in secondary wind speed probe and the secondary concentration probe on the secondary air channel, tertiary air speed probe and three concentration that are installed on the tertiary-air pipe are popped one's head in, measuring sonde connects differential pressure transmitter by pressure tube.
2. coal powder density on-line monitoring system according to claim 1 is characterized in that, is provided with the metrical information processing unit in the described switch board, and the metrical information processing unit comprises filtration module, amplification module and the computing module that connects successively.
3. coal powder density on-line monitoring system according to claim 1 is characterized in that, described switch board surface is provided with metrical information display screen, alarm, inquire button and query display screen.
4. coal powder density on-line monitoring system according to claim 1 is characterized in that, described primary air velocity probe and tertiary air speed probe are Dual-Phrase Distribution of Gas olid gas phase flow velocity measuring sonde.
5. coal powder density on-line monitoring system according to claim 4 is characterized in that, is provided with anti-blocking stopper on the described Dual-Phrase Distribution of Gas olid gas phase flow velocity measuring sonde.
6. coal powder density on-line monitoring system according to claim 1 is characterized in that, described secondary wind speed probe comprises stagnation pressure probe and voltage stabilizing probe.
7. coal powder density on-line monitoring system according to claim 1 is characterized in that, is provided with coal dust shrinkage cavity or pulverized coal distributor between described boiler and the airduct.
8. coal powder density on-line monitoring system according to claim 7 is characterized in that, is provided with a plurality of bifurcated pipes on the described pulverized coal distributor, is connected with a plurality of airducts respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220227844 CN202649085U (en) | 2012-05-21 | 2012-05-21 | Coal powder density online monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220227844 CN202649085U (en) | 2012-05-21 | 2012-05-21 | Coal powder density online monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202649085U true CN202649085U (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220227844 Expired - Fee Related CN202649085U (en) | 2012-05-21 | 2012-05-21 | Coal powder density online monitoring system |
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| Country | Link |
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| CN (1) | CN202649085U (en) |
Cited By (1)
| 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 |
-
2012
- 2012-05-21 CN CN 201220227844 patent/CN202649085U/en not_active Expired - Fee Related
Cited By (1)
| 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 |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20190521 |