CN1092170A - Constant speed filter-type fly ash specific resistance tester - Google Patents
Constant speed filter-type fly ash specific resistance tester Download PDFInfo
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- CN1092170A CN1092170A CN 93101434 CN93101434A CN1092170A CN 1092170 A CN1092170 A CN 1092170A CN 93101434 CN93101434 CN 93101434 CN 93101434 A CN93101434 A CN 93101434A CN 1092170 A CN1092170 A CN 1092170A
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- probe
- fly ash
- tube
- electrode
- flue
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Abstract
A kind of constant speed filter-type fly ash specific resistance tester of measuring the flue gas fly ash resistivity, be applicable to the fly ash resistivity of measuring in the flue, novel analyzer has adopted flue static pressure and sampling static pressure surveillance, designed the novel sampling probe, can guarantee that sample rate equates with velocity of flue gas in the flue, satisfy the consistance that sampling flying dust and actual fly ash granule are formed, improve the precision of measuring fly ash resistivity, be the design of electric precipitator, and operation provides accurate data.
Description
A kind of surveying instrument of measuring fume duct fly ash than resistance.
At present, the in-site measurement fly ash resistivity adopts cottrell precipitator or whirly cartridge type particle collector more both at home and abroad, and be equipped with the method for megger, with these method actual acquisition to and the flying dust that is used for measuring and flue in actual flying dust inconsistent on size-grade distribution and particulate component, changed the original resistance characteristic of flying dust.Its reason be existing equipment can not the isokinetic sampling due to.The invention solves and get sample isokinetic sampling problem, and simplified the one-piece construction of instrument.
The objective of the invention is the design for electrostatic precipitator, type selecting and operation adjustment provide the fly ash resistivity that gears to actual circumstances data.
The analyzer that the present invention relates to is made of 4 parts, and this 4 part is respectively a probe (1), and it is a major part of the present invention, high resistance measuring instrument (2), aspiration pump (3), microbarograph (4).Probe (1) is gathered the flying dust in the flue, and be stored in the ceramic filter cylinder (7), high resistance measuring instrument (2) is used for measuring the fly ash resistivity in (7), aspiration pump (3) connects with probe by leather hose and flowrate control valve, for probe provides the power source of bleeding that can regulate at random, two static tubes (12) on microbarograph (4) and the probe, (13) link, the pressure reduction surveillance of having formed the interior static pressure of flue and the sampling flue gas static pressure of analyzer, variation according to pressure difference signal, this system can monitor indirectly that sampling cigarette speed is whether identical with cigarette speed in the flue, and then the flowrate control valve of bleeding regulating pump, two speed are equated, to guarantee the sampling authenticity.
Probe (1) is by constituting with the lower part, they are sampling head (5), be in the parallel short tube (6) of same horizontal level with (5), be closed in the micropore ceramics filter cylinder (7) in the probe (1), interior electrode (8), external electrode (9), (8) and (9) and micropore ceramics filter cylinder be mounted to one and leaded respectively drawing, receive on the high resistance measuring instrument (2), in, external electrode all is cylindric, wherein, on the external electrode, the ground-electrode (15) with electrode insulation is equipped with in the bottom, static tube (12), (13) be divided into, following two sections, two pipes of epimere communicate and are welded as a whole with the parallel short tube of sampling head (5) (6), and epimere two pipe dock by means of the packing washer location with hypomere two pipes, from the flying dust of sampling head (5) suction lodge in the micropore ceramics filter cylinder interior in, between the external electrode, (7), (8), (9), (14), (15) etc. parts all are installed in the stainless steel cavity of probe, screw with turncap (10).
It is two with one heart cylindric that micropore ceramics filter cylinder (7) adopts corundum to be fired into, inner cylinder top is the cone of a sealing, the bottom is open, be sintered to one with inner cylinder wall lower end at the bottom of the out cylinder, at right angles planar shaped is conjuncted, and there is a shade of stretching toward the outer urceolus upper end, and filter cylinder has the efficiency of dust filtration height, high temperature resistant, high pressure, superperformance such as corrosion-resistant, and can be repeatedly used.
Aspect the measurement of flow field and electric field, the size of measuring equipment has a significant impact measuring accuracy, and in this analyzer, sampling head (5), parallel short tube (6) all adopt φ 8 * 1(external diameter 8mm, wall thickness 1mm) stainless-steel tube, the length of (6) is L
1=12 ± 2mm, the welding hole centre distance L of the inlet end of (5) and (6) to static tube (12), (13)
2=6 ± 1mm, the tube center distance L of (5) and (6)
3=16 ± 2mm, the inlet end of (5) and (6) has the semicircle channelization angle of r=0.5mm.
The technical characterictic that is installed on the electrode in the micropore ceramics filter cylinder (7) is: interior electrode external diameter φ=22 ± 1mm, electrode insulate with insulating mat and (7), the electrode height is 10 ± 1mm, internal diameter φ=28.5 ± the 1mm of external electrode, high 6 ± the 1mm of electrode, external electrode upper and lower is equipped with the ground-electrode (15) with the external electrode insulation respectively, and with lead by probing shell ground connection.
Because probe is operated under high temperature and the sour gas condition, parts such as its housing are all manufactured with stainless steel material, the resistant to elevated temperatures teflon of insulating material, utilize cock (11) firm being fixed in the flue of will popping one's head in during test, the high resistance tester can be selected the versatility measurement instrument for use, aspiration pump and microbarograph are also selected light conventional equipment, to adjust during sampling and surveillance equipment, guarantee that the sampling static pressure is identical with the flue static pressure, general sampling 15～20 minutes, the flying dust in (7) promptly is filled with just can measure value.
Fig. 1 is fly ash specific resistance tester measuring system figure.
Fig. 2 is that the micropore ceramics filter cylinder is analysed and observe, the potential electrode scheme of installation.
Fig. 3 is the probe end structural drawing.
Fig. 4 is the sonde configuration synoptic diagram.
(1) is probe among the figure, and (2) are the high resistance measuring instruments, (3) aspiration pump, (4) microbarograph, (5) sampling head, (6) parallel short tube, (7) micropore ceramics filter cylinder, (8) interior electrode, (9) external electrode, (10) turncap, (11) cock, (12), (13) static tube, (14) insulating mat, (15) ground-electrode, L
1The length of parallel short tube (6), L
2Be that (5), (6) inlet end are to static tube (12), (13) and (5), (6) welding perforate centre distance length, L
3Be the centre distance of (5) and (6) pipe, r channelization angle radius.
Claims (4)
1, a kind of fly ash resistivity on-site measurement instrument, by probe (1), high resistance meter (2), aspiration pump (3), microbarograph formations such as (4), it is characterized in that: static tube (12), (13) of being drawn by analyzer probe (1) connect with the two ends of microbarograph (4) respectively, constitute static pressure and sampling flue gas static pressure surveillance in the flue; Probe (1) is by sampling head (5), place the parallel short tube (6) of horizontal level with (5), the interior electrode (8) and the external electrode (9) that are closed in micropore ceramics filter cylinder (7) in (1), install with (7) one, static tube (12), (13) constitute, and (12), (13) upper end communicates and is welded as a whole with (5), (6) respectively; Flying dust in the flue sucks and lodges between (7) interior inside and outside electrode (8), (9) from (5).
2, analyzer probe according to claim 1, it is characterized in that: be loaded on the micropore ceramics filter cylinder (7) in the probe (1), be fired into two with one heart cylindric with corundum, inner cylinder top is the cone of a sealing, the bottom is open, be sintered to one with the inner tube wall lower end at the bottom of the out cylinder, at right angles planar shaped is conjuncted, and there is a shade of stretching to the outer urceolus upper end.
3, analyzer according to claim 1 probe, it is characterized in that: sampling head (5), parallel short tube (6) all adopt φ 8 * 1(external diameter 8mm, wall thickness 1mm) stainless-steel tube, the length L of (6)
1=12 ± 2mm, the welding hole centre distance L of the inlet end of (5) and (6) to static tube (12), (13)
2=6 ± 1mm, the tube center distance L of (5) and (6)
3=16 ± 2mm, the inlet end of (5) and (6) has the semicircle channelization angle of r=0.5mm.
4, analyzer probe according to claim 1, it is characterized in that: interior electrode external diameter φ=22 ± 1mm, height is 10 ± 1mm, and external electrode internal diameter φ=28.5 ± 1mm height is 6 ± 1mm, and the upper and lower part of external electrode is provided with ground-electrode respectively and insulate with external electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93101434A CN1035689C (en) | 1993-03-05 | 1993-03-05 | Constant speed filter-type fly ash specific resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN93101434A CN1035689C (en) | 1993-03-05 | 1993-03-05 | Constant speed filter-type fly ash specific resistance tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1092170A true CN1092170A (en) | 1994-09-14 |
| CN1035689C CN1035689C (en) | 1997-08-20 |
Family
ID=4983594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93101434A Expired - Fee Related CN1035689C (en) | 1993-03-05 | 1993-03-05 | Constant speed filter-type fly ash specific resistance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1035689C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308179B (en) * | 2008-07-11 | 2010-06-09 | 华北电力大学（保定） | Powder dust electrical behavior multi- behavior simulation test system |
| CN106324348A (en) * | 2016-07-19 | 2017-01-11 | 华北电力大学（保定） | Straight ash-loading type dust specific resistance on-line measuring device |
| CN107449968A (en) * | 2017-07-31 | 2017-12-08 | 浙江菲达环保科技股份有限公司 | Flying dust operating mode ratio resistance and experiment ratio resistance measure device |
| CN109283226A (en) * | 2018-11-29 | 2019-01-29 | 北京国电龙源环保工程有限公司 | The dust stratification measuring device and its measurement method on denitrating catalyst surface |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51122494A (en) * | 1975-04-18 | 1976-10-26 | Hitachi Plant Eng & Constr Co Ltd | Method of measuring a virtual dust layer resistance rate at site |
| JPS62190457A (en) * | 1986-02-17 | 1987-08-20 | Nippon Kagaku Kogyo Kk | Dust electric resistivity measuring instrument |
-
1993
- 1993-03-05 CN CN93101434A patent/CN1035689C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101308179B (en) * | 2008-07-11 | 2010-06-09 | 华北电力大学（保定） | Powder dust electrical behavior multi- behavior simulation test system |
| CN106324348A (en) * | 2016-07-19 | 2017-01-11 | 华北电力大学（保定） | Straight ash-loading type dust specific resistance on-line measuring device |
| CN107449968A (en) * | 2017-07-31 | 2017-12-08 | 浙江菲达环保科技股份有限公司 | Flying dust operating mode ratio resistance and experiment ratio resistance measure device |
| CN107449968B (en) * | 2017-07-31 | 2023-05-05 | 浙江菲达环保科技股份有限公司 | Fly ash working condition specific resistance and experimental specific resistance measuring device |
| CN109283226A (en) * | 2018-11-29 | 2019-01-29 | 北京国电龙源环保工程有限公司 | The dust stratification measuring device and its measurement method on denitrating catalyst surface |
| CN109283226B (en) * | 2018-11-29 | 2023-12-26 | 国能龙源环保有限公司 | Ash deposition measuring device and method for denitration catalyst surface |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1035689C (en) | 1997-08-20 |
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| C14 | Grant of patent or utility model | ||
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