CN105137500A - Flue gas pretreatment device blocking monitoring device and method - Google Patents
Flue gas pretreatment device blocking monitoring device and method Download PDFInfo
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- CN105137500A CN105137500A CN201510450767.9A CN201510450767A CN105137500A CN 105137500 A CN105137500 A CN 105137500A CN 201510450767 A CN201510450767 A CN 201510450767A CN 105137500 A CN105137500 A CN 105137500A
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Abstract
The invention discloses a flue gas pretreatment device blocking monitoring device and a method. The flue gas pretreatment device comprises a heating device and a sampling probe, wherein the sampling probe comprises a filtering head; a high temperature-resisting collimation fiber is arranged in front of the filtering head; the input end of the high temperature-resisting collimation fiber is connected with a 1064nm frequency-stabilized laser; uniformly-distributed micro laser energy monitoring probes are arranged behind the filtering head; the output ends of the uniformly-distributed micro laser energy monitoring probes are connected with a control system; and the control system is internally provided with a dynamic laser energy monitoring module. Through selecting the 1064nm laser and the laser energy monitoring system, online monitoring on high-temperature flue gas filtering device blocking factors can be realized, timely cleaning of the high-temperature flue gas filtering device is further controlled, damages caused by blocking and blocking treatment cost can be reduced while flue gas components are monitored high efficiently, and the device and the method have application values.
Description
Technical field
Fume treatment field of the present invention, is specifically related to a kind of flue gas pre-treatment filtration unit based on 1064nm measurement of laser energy blocking monitoring device and method.
Background technology
Along with people are to the raising that living environment quality requires and task environmental quality requires, under complexity, rugged surroundings, the monitoring of industry spot multicomponent gas becomes more and more important, in observation process, the flue gas pretreating device intending adopting at least comprises heating arrangement and sampling probe flexibly, with operation valve on sampling probe, put in, exit the dirigibility of sample tap for ensureing to pop one's head in, sampling probe inside comprises filtering head successively, wireway and connector, filtering head inside is provided with the screen pack of some mutual superpositions to improve the filter effect of sampling head, described screen pack adopts silicon carbide ceramics sintering to form, on it, the filter bores of design is less than 2 μm of its filtering accuracies of guarantee, but while raising filtering accuracy, also the blocking of screen pack is easily caused, the monitoring that the process blocked for preventing screen pack causes is inaccurate, in current device, usually take to increase the probe Redundancy Design for blowback, when sampling apparatus works, the normal working sampling of one sampling probe, the blowback of another redundancy probe, and be aided with nitrogen blowback is carried out to sampling probe, prevent the blocking of sampling probe, this design adds the cost of instrument and the difficulty of consumption and operation.
The laser energy of 1064nm laser is little, monochromaticity is good, anti-interference is good, propagation distance is far away, the absorption absorbed by the many groupings of flue dust is less, and the laser that can send based on the 1064nm nano laser of the permanently strong degree of constant frequency carries out the measurement of flue gas pre-treatment filtration unit chocking-up degree through the energy measurement after flue gas pre-treatment filtration unit.
Summary of the invention
The defect that flue gas pretreating device in flue gas monitoring of the present invention exists and deficiency, propose a kind of flue gas pre-treatment based on 1064nm measurement of laser energy and filter blocking monitoring device and method.
The technical solution used in the present invention is as follows:
Blocking monitoring device is filtered in a kind of flue gas pre-treatment based on 1064nm measurement of laser energy, described flue gas pretreating device comprises heating arrangement and sampling probe, described sampling probe comprises the filtering head, wireway and the connector that connect successively, bed filtration net is provided with in described filtering head, it is characterized in that, described filtering head front is provided with high temperature resistant collimating optical fibre, and the input end of described high temperature resistant collimating optical fibre is connected with 1064nm frequency stabilized laser; Described filtering head rear is provided with equally distributed miniature laser energy monitoring probe, and the output terminal of described equally distributed miniature laser energy monitoring probe is connected with control system, and described control system is connected with operation valve, and described operation valve controls probe.
Described equally distributed miniature laser energy monitoring probe is 3-6 equally distributed miniature laser energy monitoring probe;
Described equally distributed miniature laser energy monitoring probe is corrosion-resistant, high temperature resistant, non-adsorbable laser energy probe;
Described high-temperature resistant optical fiber is multimode high-temperature resistant optical fiber;
Laser energy dynamic monitoring module is provided with in described control system.
A blocking monitoring method is filtered in flue gas pre-treatment based on 1064nm measurement of laser energy, it is characterized in that, comprises the following steps:
(1), set up laser energy dynamic monitoring modular model, step is as follows:
The average energy E0 that when 1.1, measuring the heating-up temperature T0 of heating arrangement, 1064nm laser passes without blocking filtering device for N time;
1.2, the heating-up temperature measuring heating arrangement is Tk=T0+Tn (n=1,2,3 respectively ... ..n) time, average energy E1, E2, E3 that 1064nm laser passes without blocking filtering device for N time ... En, and determine the variation relation of K1=En/E0 with Tn;
When 1.3, measuring the heating-up temperature T0 of heating arrangement, 1064nm laser N time is through the energy change value E having blocking filtering device
n, set up K2=EN/E0, through the relation of overtesting determination filtration unit damage factor β and K1, K2, and revise, obtain experimental formula;
(2) when, measuring the heating-up temperature Tx of heating arrangement, 1064nm laser is through the energy change value E having blocking filtering device
x, by the experimental formula of control system, calculate damage factor β, be transferred to the laser energy dynamic monitoring module in control system, and in control system, set damage factor threshold value beta
0, once β>=β
0, then control system carries out blocking cleaning by operation valve control probe.
Beneficial effect of the present invention is embodied in:
The on-line monitoring of the present invention by selecting 1064nm laser and laser energy monitoring system to realize filtering high-temperature flue gas device damage factor, and then control the timely cleaning of filtering high-temperature flue gas device, while reaching efficient monitoring smoke components, decrease the low cost blocking infringement and the plugging handling caused, there is using value.
Accompanying drawing explanation
Fig. 1 is the sampling probe schematic diagram that the present invention relates to;
Wherein: 1, connector; 2, wireway; 3, filtering head; 4, miniature laser energy monitoring probe; 5, collimating optical fibre and laser instrument.
Embodiment
A kind of blocking of the flue gas pretreating device based on 1064nm measurement of laser energy monitoring device, described flue gas pretreating device comprises heating arrangement and sampling probe, described sampling probe as shown in Figure 1, comprise the filtering head 3, wireway 2 and the connector 1 that connect successively, bed filtration net is provided with in described filtering head, it is characterized in that, described filtering head front is provided with high temperature resistant collimating optical fibre 5, and the input end of described high temperature resistant collimating optical fibre is connected with 1064nm frequency stabilized laser; Described filtering head rear is provided with equally distributed miniature laser energy monitoring probe 4, and the output terminal of described equally distributed miniature laser energy monitoring probe is connected with control system, and described control system is connected with operation valve, and described operation valve controls probe.
Described equally distributed miniature laser energy monitoring probe is 3-6 equally distributed miniature laser energy monitoring probe;
Described equally distributed miniature laser energy monitoring probe is corrosion-resistant, high temperature resistant, non-adsorbable laser energy probe;
Described high-temperature resistant optical fiber is multimode high-temperature resistant optical fiber;
Laser energy dynamic monitoring module is provided with in described control system.
Based on a flue gas pretreating device blocking monitoring method for 1064nm measurement of laser energy, it is characterized in that, comprise the following steps:
(1), set up laser energy dynamic monitoring modular model, step is as follows:
The average energy E0 that when 1.1, measuring the heating-up temperature T0 of heating arrangement, 1064nm laser passes without blocking filtering device for N time;
1.2, the heating-up temperature measuring heating arrangement is Tk=T0+Tn (n=1,2,3 respectively ... ..n) time, average energy E1, E2, E3 that 1064nm laser passes without blocking filtering device for N time ... En, and determine the variation relation of K1=En/E0 with Tn;
When 1.3, measuring the heating-up temperature T0 of heating arrangement, 1064nm laser N time is through the energy change value E having blocking filtering device
n, set up K2=EN/E0, through the relation of overtesting determination filtration unit damage factor β and K1, K2, and revise, obtain experimental formula;
(2) when, measuring the heating-up temperature Tx of heating arrangement, 1064nm laser is through the energy change value E having blocking filtering device
x, by the experimental formula of control system, calculate damage factor β, be transferred to the laser energy dynamic monitoring module in control system, and in control system, set damage factor threshold value beta
0, once β>=β
0, then control system carries out blocking cleaning by operation valve control probe.
Claims (2)
1. a flue gas pretreating device blocking monitoring device, described flue gas pretreating device comprises heating arrangement and sampling probe, described sampling probe comprises the filtering head, wireway and the connector that connect successively, bed filtration net is provided with in described filtering head, it is characterized in that, described filtering head front is provided with high temperature resistant collimating optical fibre, and the input end of described high temperature resistant collimating optical fibre is connected with 1064nm frequency stabilized laser; Described filtering head rear is provided with equally distributed miniature laser energy monitoring probe, and the output terminal of described equally distributed miniature laser energy monitoring probe is connected with control system, and described control system is connected with operation valve, and described operation valve controls probe;
Described equally distributed miniature laser energy monitoring probe is 3-6 equally distributed miniature laser energy monitoring probe;
Described equally distributed miniature laser energy monitoring probe is corrosion-resistant, high temperature resistant, non-adsorbable laser energy probe;
Described high-temperature resistant optical fiber is multimode high-temperature resistant optical fiber;
Laser energy dynamic monitoring module is provided with in described control system.
2. a flue gas pretreating device blocking monitoring method, is characterized in that, comprise the following steps:
(1), set up laser energy dynamic monitoring modular model, step is as follows:
The average energy E0 that when 1.1, measuring the heating-up temperature T0 of heating arrangement, 1064nm laser passes without blocking filtering device for N time;
1.2, the heating-up temperature measuring heating arrangement is Tk=T0+Tn (n=1,2,3 respectively ... ..n) time, average energy E1, E2, E3 that 1064nm laser passes without blocking filtering device for N time ... En, and determine the variation relation of K1=En/E0 with Tn;
When 1.3, measuring the heating-up temperature T0 of heating arrangement, 1064nm laser N time is through the energy change value E having blocking filtering device
n, set up K2=EN/E0, through the relation of overtesting determination filtration unit damage factor β and K1, K2, and revise, obtain experimental formula;
(2) when, measuring the heating-up temperature Tx of heating arrangement, 1064nm laser is through the energy change value E having blocking filtering device
x, by the experimental formula of control system, calculate damage factor β, be transferred to the laser energy dynamic monitoring module in control system, and in control system, set damage factor threshold value beta
0, once β>=β
0, then control system carries out blocking cleaning by operation valve control probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510450767.9A CN105137500A (en) | 2015-07-25 | 2015-07-25 | Flue gas pretreatment device blocking monitoring device and method |
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| CN201510450767.9A CN105137500A (en) | 2015-07-25 | 2015-07-25 | Flue gas pretreatment device blocking monitoring device and method |
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| JP2000241313A (en) * | 1999-02-17 | 2000-09-08 | Nippon Telegr & Teleph Corp <Ntt> | Gas spectrochemical analysis device |
| US20040036028A1 (en) * | 2002-08-22 | 2004-02-26 | Shiquan Tao | Hexavalent chromium monitor |
| CN201926618U (en) * | 2010-09-25 | 2011-08-10 | 北京牡丹联友电子工程有限公司 | Optical measuring probe system for high humidity low concentration gas fume pollutants |
| CN102252991A (en) * | 2011-06-03 | 2011-11-23 | 天津市蓝宇科工贸有限公司 | Ultraviolet differential flue gas concentration monitoring system through heat and moisture extraction process |
| CN102749286A (en) * | 2012-07-31 | 2012-10-24 | 郭振铎 | Novel portable gas normal position monitor of flue gas and pipeline gas |
| CN103189738A (en) * | 2010-10-27 | 2013-07-03 | 原子能和替代能源委员会 | Smoke analysis characterization cell |
| CN103424378A (en) * | 2012-05-14 | 2013-12-04 | 陈惠龙 | Portable optical-fiber-sensing apparatus for detecting concentration of flammable and explosive gases and hazardous gases |
| CN204386700U (en) * | 2014-12-12 | 2015-06-10 | 浙江吉利汽车研究院有限公司 | A kind of deaerator with filter core blocking monitoring function |
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2015
- 2015-07-25 CN CN201510450767.9A patent/CN105137500A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10300671A (en) * | 1997-04-22 | 1998-11-13 | Yokogawa Electric Corp | Equipment for measuring micro particle |
| JP2000241313A (en) * | 1999-02-17 | 2000-09-08 | Nippon Telegr & Teleph Corp <Ntt> | Gas spectrochemical analysis device |
| US20040036028A1 (en) * | 2002-08-22 | 2004-02-26 | Shiquan Tao | Hexavalent chromium monitor |
| CN201926618U (en) * | 2010-09-25 | 2011-08-10 | 北京牡丹联友电子工程有限公司 | Optical measuring probe system for high humidity low concentration gas fume pollutants |
| CN103189738A (en) * | 2010-10-27 | 2013-07-03 | 原子能和替代能源委员会 | Smoke analysis characterization cell |
| CN102252991A (en) * | 2011-06-03 | 2011-11-23 | 天津市蓝宇科工贸有限公司 | Ultraviolet differential flue gas concentration monitoring system through heat and moisture extraction process |
| CN103424378A (en) * | 2012-05-14 | 2013-12-04 | 陈惠龙 | Portable optical-fiber-sensing apparatus for detecting concentration of flammable and explosive gases and hazardous gases |
| CN102749286A (en) * | 2012-07-31 | 2012-10-24 | 郭振铎 | Novel portable gas normal position monitor of flue gas and pipeline gas |
| CN204386700U (en) * | 2014-12-12 | 2015-06-10 | 浙江吉利汽车研究院有限公司 | A kind of deaerator with filter core blocking monitoring function |
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Application publication date: 20151209 |
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