CN2655241Y - On-line detector for carbon content in flyash from coal boiler and kiln - Google Patents
On-line detector for carbon content in flyash from coal boiler and kiln Download PDFInfo
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- CN2655241Y CN2655241Y CN 200320111175 CN200320111175U CN2655241Y CN 2655241 Y CN2655241 Y CN 2655241Y CN 200320111175 CN200320111175 CN 200320111175 CN 200320111175 U CN200320111175 U CN 200320111175U CN 2655241 Y CN2655241 Y CN 2655241Y
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- flying dust
- dust
- flue
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Abstract
An online detecting device of a fuel coal boiler and a furnace flying dust carbon containing quantity belongs to the detecting technological art, which is used to solve the problem that the dust carbon containing quantity online detecting has low preciseness. The scheme is that the utility model comprises a flying dust collecting mechanism, a flying dust measuring chamber, a light source, a digit camera, a computer controlling system and a monitor, wherein the flying dust collecting mechanism comprises a whirlwind separator, a smoke gas sampling pipe, a smoke gas back pipe and a dust sample transmission pipe. The utility model can sample a flying dust sample image, get the dust degree value according to the image discrimination by an image processing program, and calculate the corresponding flying dust carbon containing quantity according to the dust degree value and the corresponding labeling function. The precise can discriminate the flying dust carbon containing quantity variation of 0.05%. The utility model detects directly, rapidly and continuously, with high measuring precise, which can perform online and timely detecting. The detecting device has simple structure, low cost, is basically maintenance free, and has reliable work. The detecting device forms a sealing system, which won't bring new pollution to around environment.
Description
Technical field
The utility model relates to a kind of measurement mechanism that is used to detect coal-burning boiler and stove unburned carbon in flue dust, belongs to the detection technique field.
Background technology
Unburned carbon in flue dust is the important indicator of reflection boiler or kiln burning efficient in boiler or the stove flue gas, and measuring unburned carbon in flue dust continuously real-time and accurately is to monitor boiler operatiopn and implement the effectively basis of control.At present, the online measuring technique that is used for unburned carbon in flue dust both at home and abroad, all adopt measuring method based on the microwave absorbing principle, the principle of this method is, make the flying dust separated in the flue gas stream by being provided with the passage of microwave emission and Absorbing Sensor, can cause the different principle of microwave transmission energy attenuation, measure current microwave and launch and endergonic difference according to the difference of carbon content in the flying dust, and compare with the demarcation sample of unburned carbon in flue dust, try to achieve the carbon content in the flying dust indirectly.Because Microwave Measurement is subjected to the interference of factors such as flying dust ash sample weight, moisture easily, and flying dust is inevitable to the pollution of channel wall, attached to the precision that the meeting of the flying dust on wall appreciable impact is measured, making and detecting data is not the True Data of sampling, and measuring error is bigger.And, the energy that need detect the microwave emission simultaneously and absorb, and after computing, be converted into unburned carbon in flue dust again, the detection link is many, and measuring error is bigger, only can detect once the flying dust sample of each collection, therefore, can't satisfy in the burning optimization robot control system(RCS) accuracy requirement to real time data.
Summary of the invention
Problem of the present utility model be to solve coarse defective of unburned carbon in flue dust on-line determination and provide a kind of fast, accurately, be suitable for a kind of coal-burning boiler that online in real time detects and the measurement mechanism of smoke dust of furnace kiln carbon content.
The alleged problem of the utility model realizes with following proposal:
The on-line measuring device of a kind of coal-burning boiler and stove unburned carbon in flue dust, it is by flying dust collecting mechanism 1, flying dust measuring cell 7, light source 2, digital camera 3, computer control system 4, display 5 is formed, wherein, the flying dust collecting mechanism is again by cyclone separator 1-1, gas sampling probe 1-2, flue gas loopback pipe 1-3, and ash sample delivery pipe 1-4 forms, described gas sampling probe one end inserts in the boiler flue, the other end links to each other with the inlet of cyclone separator 1-1, the outlet of termination cyclone separator under the flue gas loopback pipe 1-3, the other end inserts in the boiler flue, one of ash sample delivery pipe 1-4 is terminated at the ash hole of cyclone separator, and the other end leads to measuring cell 7; Described flying dust measuring cell is a tubular airtight container, the top stationary digital video camera 3 and the light source 2 of container, and ash sample 9 is collected in the bottom, and light source 2 and digital camera and computer control system 4 are joined, and the data output end of computer control system connects display 5.
Open and close for controlling the ash door, the on-line measuring device of above-mentioned coal-burning boiler and stove unburned carbon in flue dust, the bottom of described measuring cell 7 is a frustum, be provided with grey gate control mechanism 11 in the bottom of frustum, ash gate control mechanism 11 is made up of ash door 11-1, electromagnet DCT, connecting rod 11-2, described ash door mates with the bottom ash hole sealing of measuring cell, and joins through the armature of movable rod 11-2, hinge 11-3 and electromagnet DCT.
For the ash sample after will measuring is recycled to boiler flue, the on-line measuring device of above-mentioned coal-burning boiler and stove unburned carbon in flue dust, soot blower structure 6 is set below measuring cell, soot blower structure 6 is made up of injector 6-3, blowpipe 6-4, ash feeding pipe 6-2, wherein, on the end face of the left and right sides of injector, each is communicated with ash feeding pipe 6-2 and blowpipe 6-4, the other end of blowpipe is communicated with compressed gas source 10, the other end of ash feeding pipe is communicated with boiler flue 8, on the sidewall of injector, vertical connection ash tube 6-1, the upper port of ash tube communicates with the ash hole of measuring cell.
For ease of automatic control, the on-line measuring device of above-mentioned coal-burning boiler and stove unburned carbon in flue dust inserts solenoid valve DCF1 in the pipeline of ash sample delivery pipe 1-4, insert solenoid valve DCF2 in the pipeline of blowpipe 6-4.
This mensuration ratio juris is that also with regard to difference, carbon content gray scale high more, flying dust is more little in the flying dust for carbon content difference in the flue dust flying dust, the gray scale of flying dust outward appearance (or colourity), has the relation that approximately linear changes.Utilize high-resolution color digital camera (CCD) and computer picture gray scale digit recognition and treatment technology, can distinguish 0.05% unburned carbon in flue dust variation, be enough to satisfy the needs of the online detection of unburned carbon in flue dust in coal-burning boiler or the stove flue gas.Because the funtcional relationship of carbon content and flying dust gray scale is constant to specific boiler or coal and flying dust thereof that stove used in the flying dust, can be in advance obtain the demarcation that experimentizes of enough flying dust samples by practical object.
According to the assay method that the utility model provides, can measure the carbon content of flue dust in coal-burning boiler and the stove directly, rapidly, continuously, measure the numerical precision height, and can carry out online in real time and detect.The pick-up unit that the utility model provides, simple in structure, cost is low, and is non-maintaining substantially; Reliable operation, testing process all is connected in the closed system from sampling, being measured to ash sample loopback boiler flue, can not cause new pollution to surrounding environment.The required flying dust sample size of each detection only is that the flying dust image of each picked-up is the flying dust sample that drops on the top layer recently, even deashing is not thorough, does not also influence the precision of measurement about 2 grams.Simultaneously, this device can carry out the several images acquired to same flying dust sample in the extremely short time, can reject data processing such as badly being worth, averaging to the result, helps improving the precision of detection.
Description of drawings
Fig. 1 is a structural principle synoptic diagram of the present utility model;
Fig. 2 is the trace routine FB(flow block);
Fig. 3 is program control system figure;
Fig. 4 is the relation curve of unburned carbon in flue dust and gray scale.
Embodiment
On-line measuring device of the present utility model mainly is made of seven parts: flying dust collecting mechanism 1, flying dust measuring cell 7, grey gate control mechanism 11, soot blower structure 6, light source 2, digital camera 3, computer control system 4 and display 5 are formed.
Adopt the utility model to detect in the flying dust carbon content and divided for four steps carried out, at first, by isolating a small amount of flying dust (about about 2 grams) in the boiler smoke, and it is collected in airtight detection receptacle---in the measuring cell 7; Then, start constant light source and the digital camera of luminous intensity, gather one or more flying dust sample image by computer control system; Carry out Flame Image Process by computer control system again, and recognition image gray scale (or colourity), change it digital signal of certain precision into, and according to the good unburned carbon in flue dust of prior demarcation and the funtcional relationship of its gray-scale value (or chromatic value), computing becomes corresponding unburned carbon in flue dust; At last, the carbon content numerical value that shows this moment flying dust by output unit.
Detect control circuit and adopt the relay programmed control, be made of six time relay sj 1～SJ6, two solenoid valve DCF1, DCF2 and electromagnet DCT, the process of testing is such:
The first step: log-on data is gathered master routine, timer picks up counting, (the signal transmission frequency is 1 time/5 minutes to computer control system by I/O after 5 minutes, by timer control) send a trigger pip (0 constantly), make signal amplify maker DK work, turn-on time relay SJ1, be 22 seconds the time delay of SJ1, after promptly 22 seconds, the The whole control circuit quits work.
Second step: time relay sj 2 is started working, and be 22 seconds its time delay.It is controlling solenoid valve DCF1 and time relay sj 3 and SJ5 simultaneously.One group of contact of SJ2 makes solenoid valve DCF1 (open type) action, cuts off the flying dust pipeline, stops flying dust to continue to fall into the flying ash sampling dish; One group of contact provides closed circuit for SJ3, and be 8 seconds the time delay of SJ3, gives ccd video camera and led light source power supply by the N-C loop, and by N-O circuit controls time relay sj 4; Another group contact provides closed circuit for time relay sj 5, and SJ5 sets time-delay 13 seconds.
The 3rd step: after 5 seconds, start the image acquisition subroutine, gather the flying dust sample image.
The 4th step: through 3 seconds (after promptly 8 seconds), ccd video camera and led light source power supply are cut off in the SJ3 action, the closed-loop path is provided for simultaneously time relay sj 4, SJ4 (be 8 seconds time delay) is started working, and blowing tube way solenoid valve DCF2 (closed type) opens, and makes injector work.
The 5th step: after 5 seconds (after promptly 13 seconds), time relay sj 5 actions, electromagnet DCT starts working, deashing.
The 6th step: after 5 seconds (after promptly 18 seconds), time relay sj 6 (delay adjustments is 5 seconds) action, the power supply of tripping magnet DCT, electromagnet sets back.
The 7th step: after 2 seconds (after promptly 20 seconds), the SJ4 action is cut off, the power supply of soot blower structure solenoid valve DCF2, and injector quits work.
The 8th step: after 2 seconds (after promptly 22 seconds), ash sample delivery pipe pipeline electromagnetic valve DCF1 power supply is cut off in SJ1 and SJ2 action, begins to adopt ash.
At this moment, finish one and adopt the ash sampling.
The numerical range that the utility model is measured unburned carbon in flue dust is 0-20%, and under institute's coal of surveying and the little situation of demarcation coal variation, the precision of differentiable unburned carbon in flue dust reaches 0.05%, is enough to satisfy the requirement of online detection engineering to precision.
Claims (4)
1. the on-line measuring device of coal-burning boiler and stove unburned carbon in flue dust, it is characterized in that, it is by flying dust collecting mechanism [1], flying dust measuring cell [7], light source [2], digital camera [3], computer control system [4], display [5] is formed, wherein, the flying dust collecting mechanism is again by cyclone separator [1-1], gas sampling probe [1-2], flue gas loopback pipe [1-3], and ash sample delivery pipe [1-4] is formed, described gas sampling probe one end inserts in the boiler flue, the other end links to each other with the inlet of cyclone separator [1-1], flue gas loopback pipe [1-3] is the outlet of termination cyclone separator down, the other end inserts in the boiler flue, one of ash sample delivery pipe [1-4] is terminated at the ash hole of cyclone separator, and the other end leads to measuring cell [7]; Described flying dust measuring cell is a tubular airtight container, the top stationary digital video camera [3] of container and light source [2], ash sample [9] is collected in the bottom, and light source [2] and digital camera and computer control system are joined, and the data output end of computer control system connects display [5].
2. the on-line measuring device of unburned carbon in flue dust according to claim 1, it is characterized in that, the bottom of described measuring cell is a frustum, be provided with grey gate control mechanism [11] in the bottom of frustum, ash gate control mechanism [11] is made up of ash door [11-1], electromagnet DCT, connecting rod [11-2], described ash door mates with the bottom ash hole sealing of measuring cell, and joins with the armature of electromagnet DCT through movable rod [11-2], hinge [11-3].
3. according to the on-line measuring device of the described unburned carbon in flue dust of claim 2, it is characterized in that, soot blower structure [6] is set below measuring cell, soot blower structure [6] is made up of injector [6-3], blowpipe [6-4], ash feeding pipe [6-2], wherein, on the end face of the left and right sides of injector, each is communicated with ash feeding pipe [6-2] and blowpipe [6-4], the other end of blowpipe is communicated with compressed gas source [10], the other end of ash feeding pipe is communicated with boiler flue [8], at the upper wall of injector, vertical connection ash tube [6-1], the upper port of ash tube communicates with the ash hole of measuring cell.
4. according to the on-line measuring device of the described unburned carbon in flue dust of claim 3, it is characterized in that, in the pipeline of ash sample delivery pipe [1-4], insert solenoid valve DCF1, in the pipeline of blowpipe [6-4], insert solenoid valve DCF2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320111175 CN2655241Y (en) | 2003-11-06 | 2003-11-06 | On-line detector for carbon content in flyash from coal boiler and kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320111175 CN2655241Y (en) | 2003-11-06 | 2003-11-06 | On-line detector for carbon content in flyash from coal boiler and kiln |
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| Publication Number | Publication Date |
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| CN2655241Y true CN2655241Y (en) | 2004-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200320111175 Expired - Fee Related CN2655241Y (en) | 2003-11-06 | 2003-11-06 | On-line detector for carbon content in flyash from coal boiler and kiln |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413892B (en) * | 2008-11-21 | 2010-10-27 | 山东惠工仪器有限公司 | Flyash ingredient on-line detection device based on laser induce plasma analysis technology |
| CN101949852A (en) * | 2010-07-30 | 2011-01-19 | 清华大学 | Spectral standardization-based coal quality on-line detection method |
| CN101128698B (en) * | 2005-02-26 | 2012-12-05 | 卡尔斯鲁厄研究中心股份有限公司 | Method for increasing the package throughput in rotary kiln plants |
| CN111141761A (en) * | 2019-12-28 | 2020-05-12 | 中电华创电力技术研究有限公司 | Power station boiler flying dust on-line sampling monitoring system |
| CN111678122A (en) * | 2020-06-08 | 2020-09-18 | 苏州臻越流体设备有限公司 | Low nox combustion system of cyclone furnace based on ccd |
| CN114965164A (en) * | 2022-06-02 | 2022-08-30 | 连云港同顺电力节能设备有限公司 | Power production fly ash monitoring system, method and storage medium |
-
2003
- 2003-11-06 CN CN 200320111175 patent/CN2655241Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101128698B (en) * | 2005-02-26 | 2012-12-05 | 卡尔斯鲁厄研究中心股份有限公司 | Method for increasing the package throughput in rotary kiln plants |
| CN101413892B (en) * | 2008-11-21 | 2010-10-27 | 山东惠工仪器有限公司 | Flyash ingredient on-line detection device based on laser induce plasma analysis technology |
| CN101949852A (en) * | 2010-07-30 | 2011-01-19 | 清华大学 | Spectral standardization-based coal quality on-line detection method |
| CN111141761A (en) * | 2019-12-28 | 2020-05-12 | 中电华创电力技术研究有限公司 | Power station boiler flying dust on-line sampling monitoring system |
| CN111678122A (en) * | 2020-06-08 | 2020-09-18 | 苏州臻越流体设备有限公司 | Low nox combustion system of cyclone furnace based on ccd |
| CN114965164A (en) * | 2022-06-02 | 2022-08-30 | 连云港同顺电力节能设备有限公司 | Power production fly ash monitoring system, method and storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |