CN101762410A - Maintenance-free sampling probe - Google Patents
Maintenance-free sampling probe Download PDFInfo
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- CN101762410A CN101762410A CN201010018269A CN201010018269A CN101762410A CN 101762410 A CN101762410 A CN 101762410A CN 201010018269 A CN201010018269 A CN 201010018269A CN 201010018269 A CN201010018269 A CN 201010018269A CN 101762410 A CN101762410 A CN 101762410A
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- filter
- sampling probe
- maintenance
- corrugated tube
- dust
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Abstract
The invention discloses a maintenance-free sampling probe, which comprises a protection cover, a dust filter arranged in the protection cover, a micropore filter, a back flushing valve, an installation seat, a bellow and a waterproof cover; the upside of the dust filter is provided with an air inlet which is communicated with the outside of the protection cover, and the downside of the dust filter is provided with an air outlet which is communicated with the micropore filter; the micropore filter is arranged behind the dust filter and is connected with the bellow, the micropore filter and the bellow are fixed on the installation seat in a cantilever connection manner, the back end of the bellow is communicated with the back flushing valve and then goes to an outlet of the sampling probe, the components are all positioned in the waterproof cover, and the waterproof cover is also provided with a sample gas outlet for gathering sample gas. The dust filter and the micropore filter form two levels of filtration, thus increasing the filtration effect; and simultaneously, a back flushing plus mechanical vibration manner is adopted to avoid dust attachment, thus realizing the maintenance-free function.
Description
Technical field
The present invention relates to a kind of on-line analysis system pretreatment unit, specifically is a kind of maintenance-free sampling probe.
Background technology
Sampling probe is important sampling apparatus in the on-line analysis system, it is installed in the rugged surroundings such as high dust, high moisture content, highly corrosive gas for a long time, finish gas sampling and filter, provide gas analyzer and carry out gas ingredients component analysis necessary part.
The gas sample is at first by sampling probe sampling, just can enter analytical instrument analysis through the pretreatment unit udst separation, after dewatering, and the pressurized air blowback of the dust in the probe by certain pressure is in flue, stove.The sampling probe of traditional both at home and abroad on-line analysis system configuration is generally " millipore filter ", and the dust that filter surfaces adheres to carries out reverse gas cleaning by gas pulse, low, the weak effect of cleaning efficiency.Resemble the dust that contains suitable concentration viscosity in the flue gas of industry coal-boiler combustion processes such as cement furnace, these dust accumulations are hardened filter probe device surface micropore are stopped up, the more serious probe thief hole that makes stops up, and causes analysis result inaccurate, the serious consequence that analytic system can't be worked.Therefore, present gas sampling probe, the maintenance period index only reaches 15～30 days, can't accomplish in 1 ~ 5 year non-maintaining level of lifetime, and can only adorn 1 grade of filtrator, filters the lower-performance index that index can only reach 3 ~ 5 sun.So this filtrator often causes sample aftertreatment and analytical instrument to cause that because of advancing ash failure rate increases, frequent maintenance, cost of use height, the problem of on-line continuous minimizing analysis time.In order to improve the maintenance period of sampling probe, existing sampling filtering probe all adopts the blowback source of the gas that blowback air pressure is provided, and is used to remove the filter surfaces dust stratification.But because the exhaust gas components complexity, and often containing moisture content, the flue gas after the wet desulphurization also contains the as easy as rolling off a log formation dirt of CaO piece and hardens, and the adhesion of flue dust on filtrator is bigger, the reverse gas cleaning poor effect, the blowback inefficiency, cause filtrator often stop up, can't the continuous sampling analysis.
Summary of the invention
Technical matters to be solved by this invention provides a kind of employing two-stage filter, the filtering accuracy height, and service time is long, and can be in order to avoid the sampling probe of safeguarding during whole mission life.
For achieving the above object, maintenance-free sampling probe of the present invention, it comprises protective cover and is installed in protective cover interior smoke filter, millipore filter, and back-flushing valve, mount pad, corrugated tube and rain cover; Described smoke filter upside is an air intake opening, air intake opening and protective cover exterior, and the smoke filter downside is provided with the gas outlet, and the gas outlet is communicated with millipore filter; Millipore filter places behind the smoke filter and with corrugated tube and links to each other, millipore filter and corrugated tube are fixed on the mount pad with the cantilever connected mode, the corrugated tube rear end is communicated with back-flushing valve and exports to sampling probe, more than each parts all be positioned at rain cover, on rain cover, also be provided with sample gas outlet and be used to collect sample gas.
Described smoke filter comprises filter body, spacing stainless steel mesh and flexible filter medium, and described two spacing stainless steel mesh are arranged in the filter body, and flexible filter medium is seated between two spacing stainless steel mesh.Described flexible filter medium is quartz particles preferably.
Smoke filter of the present invention adopts the filter medium of nonrigid time of filtration alterable features.When need filtered, the filter medium gap was less, and when deashing, it is big that time of filtration can become again.Solving another long key of maintenance period is dust can not be blocked in filter surfaces, because the actual size restrictions that is subjected to, the dust stratification area is limited, the long-pending full dust of very fast filter surfaces must cause maintenance period short, and the present invention adopts volume gap filtration method, allow dust to enter filter interior, dust is blocked in the gap that is full of filter medium inside, and same its dust containing capacity of filter size volume is much bigger, also is the important measures that prolong maintenance period.Because time of filtration becomes big automatically when deashing, be easy to the grit that is blocked in the gap is removed away again, need not to pull down maintenance works such as cleaning.
Pressurized air after filtering; make pressurized air form the pulse source of the gas by back-flushing valve and be blown into corrugated tube by outer PLC control; because corrugated tube has elasticity; promote in the corrugated tube process at the pulse source of the gas; corrugated tube produces mechanical vibration under external force; because millipore filter only is connected with insulating tube; and be suspended in the protective cover; so it also produces vibration; the dust fragmentation that is hardened in the millipore filter surface; reduced dust adhesion, removed dust, made the sampling probe all the time can non-maintaining work.
In order to improve the harden effect of dust of fragmentation, can in corrugated tube, be provided with time acoustic energy generator, with inferior acoustic energy aggravation vibration that the pulse pneumatic supply produces 20HZ by time acoustic energy generator, the reduction dust is at the adhesion of filter surfaces.
In addition, temperature regulator can also be housed in rain cover, the place is provided with well heater at the smoke filter inwall, at 130 ℃, is higher than dew point to guarantee the gas temperature that enters filtrator by temperature regulator control heater constant temperature, condensation can not occur.
Advantage of the present invention:
1, smoke filter adopts volume gap filtration method, and dimension volume is less, is easy to during blowback the grit that is blocked in the gap is removed away, need not pull down the maintenance work of cleaning.
2, utilize the pressurized air of blowback to form the pulse source of the gas, promote the elastic component corrugated tube and produce mechanical vibration, thereby drive the millipore filter vibration, the dust fragmentation that is hardened in the millipore filter surface has reduced dust adhesion, has removed dust.
3, reduce the adhesion of dust with the pulse pneumatic supply by the inferior acoustic energy that time acoustic energy generator produces 20HZ at filter surfaces.
Above-mentioned three kinds of structures make the probe cleaning efficiency higher, and guaranteeing to pop one's head in reaches non-maintaining state, adopts the two-stage filtration mode, has improved filter effect, and 2 grades of filtrators make filtering accuracy can reach 1 sun.
Description of drawings
Fig. 1 is a scheme of installation of the present invention;
Fig. 2 is a structural representation of the present invention.
Embodiment
Be the structural representation of maintenance-free sampling probe as shown in Figure 1; it comprises protective cover 1; smoke filter 2; back-flushing valve 3; mount pad 4; corrugated tube 5; millipore filter 6 and rain cover 7; wherein smoke filter 2 and millipore filter 6 are positioned at protective cover 1; smoke filter 2 upsides are air intake opening 9; air intake opening 9 and protective cover 1 exterior; smoke filter 2 downsides are provided with gas outlet 10; it behind the gas outlet of opposite side millipore filter 6; back-flushing valve 3 is used for from outside access blowback air; back-flushing valve 3 one sides are connected with mount pad 4; corrugated tube 5 one sides are fixed on the mount pad 4; opposite side connects millipore filter 6 with the cantilevered connected mode, and makes in the protective cover 1 after millipore filter places smoke filter 2 gas outlets.In corrugated tube 5, also be provided with time acoustic energy generator 14, more than each parts all be positioned at the rain cover 7 of sealing, on rain cover, be provided with sample gas outlet 8 and be used to discharge sample gas, temperature regulator 15 is housed in rain cover 7, be provided with the well heater of being controlled by temperature regulator 16 at smoke filter 2 inwall places, 17 of connection terminals are used for connecting each electric appliance component in the probe.
Smoke filter in the sampling probe comprises filter body 11, spacing stainless steel mesh 12 and flexible filter medium 13, described two spacing stainless steel mesh 12 are arranged in the filter body 11, and flexible filter medium 13 is seated between two spacing stainless steel mesh 12.
Flexible filter medium is a quartz particles, and its preparation method may further comprise the steps:
(1) with Φ 5mm steel ball and pure quartzy fragment by 1: 4-6 mixes, and in bowl mill quartzy fragment machinery is ground, and one-tenth is similar to quartz particles spherical, no corner angle;
(2) be quartz particles and the steel ball of the mesh screen filtering of 0.8mm with the aperture greater than Φ 0.8mm;
(3) be the quartz particles of the thin stainless steel mesh filtering diameter of 0.5mm with the aperture less than 0.5mm;
(4) be that the quartz particles of Φ 0.5～Φ 0.8mm scatters and shakeouts with diameter, surface sprinkling gathers tetrafluoro liquid mist, 35 ℃～45 ℃ oven dry down, shakeouts after the particle after will handling afterwards stirs again and carries out secondary and spray poly-tetrafluoro liquid mist, repeated treatments like this three times;
(5) be that the stainless steel mesh of 1mm screens out the particle greater than 1mm with the aperture again, obtain the quartz particles handled less than the fluorine of 1mm, be flexible filter medium.
The particulate filter medium corrosion-resistant, high temperature resistant (＜250 ℃) of the present invention's preparation, in spacing stainless steel mesh, be subjected to the deadweight effect, it during analysis small size, under the pulse backblowing gas pressure, particle is in the state of seething, and its volume is filled in the bigger spacing space, realizes that intergranular gap expands the mm order of magnitude automatically to.When need filtered, the gap was very little, and time of filtration can become big again when deashing.In order to solve another long key issue of maintenance period, the present invention adopts volume gap filtration method, allow dust to enter filter interior, dust is blocked in the gap that is full of filter medium inside, same its dust containing capacity of filter size volume is much bigger, also is the important measures that prolong maintenance period.Because time of filtration becomes big automatically when deashing, be easy to the grit that is blocked in the gap is removed away again, need do not pull down to clean and carry out maintenance work.There is not the contradiction on the principle between filtering accuracy and the maintenance period in this filtering smoke method of the present invention, can solve well to have bad, the easily stifled problem of filtering.
Claims (5)
1. a maintenance-free sampling probe is characterized in that it comprises protective cover (1) and is installed in protective cover interior smoke filter (2), millipore filter (6), and back-flushing valve (3), mount pad (4), corrugated tube (5) and rain cover (7); Described smoke filter (2) upside is air intake opening (9), air intake opening (9) and protective cover (1) exterior, and smoke filter (2) downside is provided with gas outlet (10), and gas outlet (10) are communicated with millipore filter (6); Millipore filter places smoke filter (2) back and links to each other with corrugated tube (5), millipore filter (6) and corrugated tube (5) are fixed on the mount pad (4) with the cantilever connected mode, corrugated tube (5) rear end is communicated with back-flushing valve (3) and exports to sampling probe, more than each parts all be positioned at rain cover (7), on rain cover, also be provided with sample gas outlet (8) and be used to collect sample gas.
2. maintenance-free sampling probe according to claim 1, it is characterized in that described smoke filter comprises filter body (11), spacing stainless steel mesh (12) and flexible filter medium (13), described two spacing stainless steel mesh (12) are arranged in the filter body (11), and flexible filter medium (13) is seated between two spacing stainless steel mesh (12).
3. maintenance-free sampling probe according to claim 1 and 2 is characterized in that flexible filter medium (13) is a quartz particles.
4. maintenance-free sampling probe according to claim 1 and 2 is characterized in that: be provided with time acoustic energy generator (14) in corrugated tube (5).
5. maintenance-free sampling probe according to claim 1 and 2 is characterized in that: temperature regulator (15) is housed in rain cover (7), is provided with the well heater (16) by temperature regulator control at smoke filter (2) inwall place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010018269A CN101762410A (en) | 2010-01-21 | 2010-01-21 | Maintenance-free sampling probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010018269A CN101762410A (en) | 2010-01-21 | 2010-01-21 | Maintenance-free sampling probe |
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|---|---|
| CN101762410A true CN101762410A (en) | 2010-06-30 |
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| CN201010018269A Pending CN101762410A (en) | 2010-01-21 | 2010-01-21 | Maintenance-free sampling probe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252873A (en) * | 2011-04-29 | 2011-11-23 | 山西省电力公司电力科学研究院 | Anti-adhesion sampling head of soot sampling gun |
| CN102410944A (en) * | 2011-08-05 | 2012-04-11 | 聚光科技(杭州)股份有限公司 | Device for removing impurities from gas and maintenance method thereof |
| CN102607899A (en) * | 2012-03-14 | 2012-07-25 | 山西省电力公司电力科学研究院 | Fume sampling (gun) pipe with replaceable and heatable anti-adhesion sampling head |
| CN105547771A (en) * | 2016-01-20 | 2016-05-04 | 安徽天承科自动化科技有限公司 | High-dust-concentration flue gas sampler |
-
2010
- 2010-01-21 CN CN201010018269A patent/CN101762410A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252873A (en) * | 2011-04-29 | 2011-11-23 | 山西省电力公司电力科学研究院 | Anti-adhesion sampling head of soot sampling gun |
| CN102252873B (en) * | 2011-04-29 | 2012-10-10 | 山西省电力公司电力科学研究院 | Anti-adhesion sampling head of soot sampling gun |
| CN102410944A (en) * | 2011-08-05 | 2012-04-11 | 聚光科技(杭州)股份有限公司 | Device for removing impurities from gas and maintenance method thereof |
| CN102410944B (en) * | 2011-08-05 | 2013-12-11 | 清本环保工程(杭州)有限公司 | Device for removing impurities from gas and maintenance method thereof |
| CN102607899A (en) * | 2012-03-14 | 2012-07-25 | 山西省电力公司电力科学研究院 | Fume sampling (gun) pipe with replaceable and heatable anti-adhesion sampling head |
| CN105547771A (en) * | 2016-01-20 | 2016-05-04 | 安徽天承科自动化科技有限公司 | High-dust-concentration flue gas sampler |
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Open date: 20100630 |