CN1035689C - 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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- CN1035689C CN1035689C CN93101434A CN93101434A CN1035689C CN 1035689 C CN1035689 C CN 1035689C CN 93101434 A CN93101434 A CN 93101434A CN 93101434 A CN93101434 A CN 93101434A CN 1035689 C CN1035689 C CN 1035689C
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- fly ash
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Abstract
The present invention relates to a constant speed filtering type fly ash specific resistance tester, which is suitable for measuring the fly ash specific resistance of smoke gas in flues. In the novel tester, a flue static pressure and sampling static pressure monitoring system is adopted, and a novel sampling probe is designed. Therefore, the present invention can guarantee the equality of the speed of sampling and the speed of smoke gas in a flue, can meet the consistency of the granulometric composition of sampling fly ash and actual fly ash and can improve the precision degree of measured fly ash specific resistance. The present invention provides accurate data for the design and the operation of duster removers.
Description
The present invention relates to a kind of surveying instrument of measuring fume duct fly ash than resistance.
At present, that measures flying dust both at home and abroad gathers flying dust than the resistance employing of manying cottrell precipitator or whirly cartridge type particle collector, measures the ratio resistance of flying dust again by other pertinent instruments.Owing to use the particulate component of actual flying dust in flying dust and the flue inconsistent with the measurement that these two kinds of methods collect, therefore changed the resistance characteristic of actual flying dust, its reason is that equipment can not constant speed be gathered due to the flying dust.The invention solves isokinetic sampling's problem of gathering the flying dust sample, also simplified the one-piece construction of surveying instrument.
The purpose of this invention is to provide a kind of analyzer of measuring fume duct fly ash than resistance.
Analyzer of the present invention is made of 4 parts, is respectively probe (1), high resistance measuring instrument (2), aspiration pump (3) and microbarograph (4).Probe (1) is gathered the interior flying dust of flue and it is stored in the micropore ceramics filter cylinder (7), high resistance meter (2) is used to measure the ratio resistance of flying dust, aspiration pump (3) provides the power of bleeding for probe (1), and microbarograph (4) is used to monitor the pressure reduction of flue and sampling flue gas.Probe (1) is a major part of the present invention, and it is by sampling head (5), place the parallel short tube (6) of horizontal level, interior electrode (8), external electrode (9) and static tube (12) and (13) formation that is closed in micropore ceramics filter cylinder (7) in the probe (1), installs with micropore ceramics filter cylinder (7) one with (5).The upper end of static tube (12), (13) communicates and is welded as a whole with sampling head (5), parallel short tube (6) respectively, and its lower end connects with the two ends of microbarograph (4) respectively, has constituted static pressure and sampling flue gas static pressure surveillance in the flue.This system can change according to the pressure difference signal of microbarograph (4) to be judged or monitors that sampling cigarette speed is whether identical with cigarette speed in the flue, if cigarette speed is different, can control by the flow of bleeding regulating pump (3), to guarantee the authenticity of sampling, flying dust in the flue sucks and lodges between the interior inside and outside electrode of micropore ceramics filter cylinder (7) from sampling head (5) under the effect of aspiration pump (3).
The interior electrode (8) and the external electrode (9) of probe (1) all are cylindrical shape, and they and micropore ceramics filter cylinder (7) are mounted to one and leaded respectively drawing, and lead-in wire is received on the high resistance meter (2).Earthing pole (15) is equipped with in the upper and lower part of external electrode, and with the earthing of casing of lead by probe, insulate between earthing pole (15) and the external electrode (9), between interior electrode (8) and the micropore ceramics filter cylinder (7) insulating mat (14) is housed.The shell of probe (1) is made with stainless steel, with turncap (10) micropore ceramics filter cylinder (7), interior electrode (8), external electrode (9), insulating mat (14), earthing pole (15) is encapsulated in the housing.
It is two with one heart cylindric that micropore ceramics filter cylinder (7) adopts the corundum raw material to be fired into, inner cylinder top is the cone of a sealing, the bottom is open, the lower end of the end of out cylinder and inner cylinder wall is sintered to one, at right angles planar shaped is conjuncted, there is an outward extending shade upper end of outer tube wall, and micropore ceramics filter cylinder (7) has efficiency of dust filtration height, high temperature high voltage resistant, superperformance such as corrosion-resistant, can be repeatedly used.
In the fields of measurement of flow field and electric field, the size of measuring equipment has a significant impact measuring accuracy.In this analyzer, sampling head (5), parallel short tube (6) all adopt the stainless-steel tube of Ф 8 * 1 (external diameter 8mm, wall thickness 1mm), and the length of parallel short tube (6) is L
1=12 ± 2mm, the welding hole centre distance L of inlet end to static tube (12), (13) of sampling head (5) and parallel short tube (6)
2=6 ± 1mm, the centre distance L of sampling head (5) and parallel short tube (6)
3=16 ± 2mm, sampling head (5) and the inlet end of parallel short tube (6) have the semicircle channelization angle of r=0.5mm.
In this analyzer, the inside and outside electrode that is loaded in the micropore ceramics filter cylinder (7) has following technical characterictic: interior electrode external diameter Ф=22 ± 1mm, and height is 10 ± 1mm, interior electrode (8) insulate with insulating mat (14) and micropore ceramics filter cylinder (7).Internal diameter Ф=28.5 ± the 1mm of external electrode (9), height are 6 ± 1mm.
Because probe is operated under high temperature and the sour gas condition, parts such as its housing are all manufactured the resistant to elevated temperatures teflon of insulating material with stainless steel material.Utilize cock (11) firm being fixed in the flue of will popping one's head in during test, high resistance measuring instrument (2) can be selected the versatility measurement instrument for use, and aspiration pump (3) and microbarograph (4) 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, generally sample 15～20 minutes.Flying dust in the micropore ceramics filter cylinder (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, (2) high resistance measuring instrument, (3) aspiration pump, (4) microbarograph, (5) sampling head, (6) parallel short tube, (7) micropore ceramics filter cylinder, (8) interior electrode, 9 among the figure) external electrode, (10) turncap, (11) cock, (12), (13) static tube, (14) insulating mat, (15) ground-electrode.L
1Be the 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), r is the channelization angle radius.
Claims (4)
1. fly ash resistivity on-site measurement instrument, by probe (1), high resistance meter (2), aspiration pump (3) and microbarograph (4) constitute, it is characterized in that: probe (1) is by sampling head (5), place the parallel short tube (6) of horizontal level with (5), be closed in the micropore ceramics filter cylinder (7) in the probe (1), interior electrode (8) with the installation of ceramic filter cylinder (7) one, external electrode (9) and static tube (12), (13) constitute, static tube (12), (13) upper end respectively with sampling head (5), parallel short tube (6) communicates and is welded as a whole, its lower end connects with the two ends of microbarograph (4) respectively, constitutes static pressure and sampling flue gas static pressure surveillance in the flue; Flying dust in the flue sucks and lodges between the interior inside and outside electrode (8) of micropore ceramics filter cylinder (7), (9) from sampling head (5) under the effect of aspiration pump (3).
2. analyzer according to claim 1, it is characterized in that: micropore ceramics filter cylinder (7) the employing corundum raw material that is loaded in the probe (1) is fired into two with one heart cylindric, 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 an outward extending shade urceolus upper end.
3. analyzer according to claim 1 is characterized in that: sampling head (5), parallel short tube (6) all adopt the stainless-steel tube of Ф 8 * 1 (outward through 8mm, wall thickness 1mm), the length L of parallel short tube (6)
1=12 ± mm, the soldering opening centre distance L of inlet end to static tube (12), (13) of sampling head (5) and parallel short tube (6)
2=6 ± 1mm, the tube center distance L of sampling head (5) and parallel short tube (6)
3=16 ± 2mm, sampling head (5) and the inlet end of parallel short tube (6) have the semicircle channelization angle of r=0.5mm.
4. analyzer according to claim 1 is characterized in that: the external diameter Ф=22 ± 1mm of interior electrode (8), height are 10 ± 1mm; Internal diameter Ф=28.5 ± the 1mm of external electrode (9), height are 6 ± 1mm, and the top and the bottom of external electrode (9) are provided with ground-electrode (15) respectively, ground-electrode (15) and external electrode (9) insulation.
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 CN1092170A (en) | 1994-09-14 |
| CN1035689C true 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) |
Families Citing this family (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 |
| 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 |
| 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 |
Citations (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
Patent Citations (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 |
Non-Patent Citations (4)
| Title |
|---|
| 冶金环保情报资料监测技术专辑之一 1982.11.1 测定比电阻的试验方法与仪器 * |
| 环境工程 1985.1.1 YJ-B1型2没粉尘比电阻仪 唐宏海 * |
| 环境工程 1985.1.1 YJ-B1型工况 粉尘比电阻仪 唐宏海 * |
| 环境工程 1985.1.1 YJ-B1型工况 粉尘比电阻仪 唐宏海;环境工程 1985.1.1 YJ-B1型2没粉尘比电阻仪 唐宏海;冶金环保情报资料监测技术专辑之一 1982.11.1 测定比电阻的试验方法与仪器; * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1092170A (en) | 1994-09-14 |
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