CN2763789Y

CN2763789Y - Laser insinuating method bag type dust remover leakage tester

Info

Publication number: CN2763789Y
Application number: CN 200420092668
Authority: CN
Inventors: 周磊; 谢明; 周明; 胡云珠
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-09-22
Filing date: 2004-09-22
Publication date: 2006-03-08
Anticipated expiration: 2014-09-22

Abstract

The utility model relates to a laser insinuating method bag type dust remover leakage tester which can be used for detecting broken filter bags of a bag type dust remover. The utility model is composed of a light source, an observation assembly and a controller, wherein the light source is composed of two sets of laser devices and an operating rod, two beams of parallel visible lights which are perpendicular to the operating rod can be sent out and the laser devices which are arranged at the end of the operating rod are inserted into the dust remover. When the soot dust is irradiated by the lights, scattered lights are generated. The operating rod is composed of a double cylinder sleeve tube. The observation assembly is composed of a camera, two sets of laser devices and an operating rod. The two sets of laser devices can emit two beams of parallel visible lights which are perpendicular to the operating rod and are in the same direction with the camera. A set of laser devices are installed at the end part of the operating rod abutting on the camera and are inserted into the dust remover, when the scattered lights are observed by the camera, the soot dust which is leaked because of the breakage of the dust remover is discovered, the controller is used and the operating rod is rotated, rest laser devices on the light source and the observation assembly are caused to realize the spanning and the track and the position of the broken filter bag can be accurately positioned.

Description

Laser slips into method sack cleaner leakage detection apparatus

Technical field:

Invention belongs to detection technique, is applicable to the detection of ventilation cleaning equipment dust removing effects, is particularly suitable for the leak detection of sack cleaner.

Background technology:

Known technology of the present invention is from " pulse bag type dust collector leak detection system " (company's sample) of smokemeter in the soot emissions continuous monitor system (CEMS) and German MIKROPUL company.The former is mainly used in and measures industrial furnace cellar for storing things discharging dust concentration, and assay method mainly is light nephelometry (accounting for 88%) and light scattering method (accounting for 12%).Instrument is installed in fly-ash separator outlet or the total floss hole of flue gas, measures the dust removing effects of cleaning equipment, if leak, can not detect is the problem of which part, more can not determine the position of damaged filter bag.Result of use to the CEMS system; in " implementing the present situation and the trend analysis of smoke pollution source on-line monitoring " (environmental protection 2002.12) literary composition, point out; the domestic cover of introducing altogether more than 50, " testing result accurately and reliably and can by almost not having that environmental administration accepts to play a role ".The latter hunts leak with pressure differential method, can only monitor the breakage of a certain row's filter bag, and can not measure the damage of some filter bags.And system complex need to be installed dozens of so that hundreds of pressure transducers, and once investment is big, and the operational management complexity was not up to the present domesticly introduced.In a word, existing monitoring instrument, leak detection system all can't navigate to the breakage of certain concrete filter bag.And system complex, investment is big, maintenance management is inconvenient, puts into operation seldom in the historical facts or anecdotes border.

Summary of the invention:

Task of the present invention provides a kind of leakage detection apparatus of sack cleaner.This device detection sensitivity height, accurate positioning, the maintenance management of filtrator is convenient in the leakage that can measure certain filter bag rapidly, and is easy for operation, invests for a short time, and economic results in society are remarkable.

As everyone knows, when the rayed air-borne particulates, can see tangible bright spot, Here it is fine particle is to the scattering of light phenomenon.When the filter bag damage of sack cleaner, volume of smoke is not filtered and promptly directly enters air-purifying chamber, and through the particular light ray irradiation scattering phenomenon can take place this moment.Utilize scattering phenomenon to measure cigarette (powder) dust concentration and the early existing application of mean particle dia.This apparatus features is that light source is not a normal optical, but laser; The method of measuring scattered light neither be with traditional photomultiplier, but with the image of periscope or the generation of video camera Direct observation scattered light, very directly perceived; Utilize this device, even the form that in air-purifying chamber, flows of flue dust as can be seen, make the judgement of leakiness become very obvious.Can obtain this effect mainly is to have used some new technologies, as laser, Digital Image Processing etc.Characteristics such as it is big that laser has emissive power, and the strong and angle of divergence of monochromaticity is little, so the feasible sensitivity of hunting leak improves greatly, it is very accurate to locate.After adopting the image digitazation computer technology, the physical quantity that flue dust leaks has become digital quantity and image, and is not only directly perceived, and interference is little in information transmission, processing procedure, and accuracy is higher.Optical lens is usually stain by flue dust in flue gas is measured, and sensitivity is descended, so that make systemic breakdown.After using nano coating to handle optical lens, be difficult for being stained with dirt on the camera lens, become " auto purification type " optical window, improved the detection degree of accuracy, reduced the work period and the intensity of clean lens, this point is particularly important for the on-bne repair system.

The sack cleaner leakage detection apparatus is made of light source, observation assembly and leak detection controller.Observe assembly and can select to use camera head or periscope, the user can select according to actual conditions.

Observing assembly comprises video camera and follows the tracks of two groups of laser instruments seeking the leak position.Video camera and laser instrument are installed on the same direction of operating rod, and one of them laser instrument is near camera arrangements.Two-laser all can send equidirectional and with the vertical parallel visible light of operating rod.If tested flue-gas temperature greater than 50 ℃, should install cooling jacket additional outside video camera and laser instrument,, guarantee video camera and laser instrument operate as normal with gas or water for cooling protection.If use the periscope Direct observation instead, only need to change video camera into periscope and get final product without video camera.

Light source can send the two bundles equidirectional parallel visible light vertical with operating rod by two groups of laser constitutions.During use, laser instrument is inserted in the fly-ash separator, its height is identical with the observation assembly.When flue-gas temperature is higher than 50 ℃, should install cooling jacket additional, according to the corresponding heat eliminating medium cooling of flue-gas temperature different choice.

Controller comprises: 1. monitor or portable computer, handle picture signal in order to observe, as when using periscope, then without monitor.2. adjust the device of video camera or periscope focal length and enlargement factor.3. the required power supply of each equipment.

Description of drawings:

Fig. 1 light source synoptic diagram

Two light source L are installed on operating rod 1 ₃And L ₄, make it can send the two bundle cocurrent and parallel visible lights vertical with operating rod.Wherein, L ₃In the insertion fly-ash separator, can send the very little parallel visible light of a beam divergence angle.This light source both can be used laser instrument, also can use other condensation light source.L ₄Be the locating laser device, be installed in outside the fly-ash separator, the L of its height and wavelength coverage and observation assembly (see figure 2) ₂Identical.L ₃And L ₄Power supply provide by cable 4.By locating flange 2, clamp nut 3 can be adjusted the degree of depth of inserting fly-ash separator.Locating flange is vertical with operating rod.When flue-gas temperature in the fly-ash separator during, should install cooling jacket additional greater than 50 ℃.Difference according to scene temperature can be selected air or water for cooling for use.

Fig. 2 observes the assembly synoptic diagram

Comprise video camera 5, the laser instrument L of follow-up investigations leak position ₁And L ₂, video camera and laser instrument are installed on the same direction of operating rod 1, L ₁Near camera arrangements.L ₂Outside fly-ash separator, two laser instruments can send the cocurrent and parallel visible light vertical with operating rod.Two laser instrument L at operating rod ₁And L ₂Between the locating flange 2 of adjusting the camera insertion depth is arranged, clamp nut 3.Image links to each other with controller by cable 4 with control signal.If flue-gas temperature is higher than 50 ℃, then at video camera and laser instrument L ₁Should adorn cooling jacket outward, bubbling air or tap water cooling guarantee video camera and laser instrument operate as normal.If use the periscope Direct observation instead without video camera, only need that video camera is replaced to periscope and get final product.

Fig. 3 leakage detection apparatus scheme of installation

Open aperture 8 on fly-ash separator top cover 5, spacing flange 6 is welded on the top cover 5, makes flange 6 concentric with aperture 8.Observe assembly and light source and insert respectively in the fly-ash separator, adjust locating flange 3 and clamp nut 7 and can change the light source and the degree of depth of observing assembly insertion fly-ash separator by aperture; Packing washer 2 is between locating flange 3 and fly-ash separator top cover 5.For the sack cleaner of most of negative pressure operations, do like this and can play sealing function.If fly-ash separator is an operation under positive pressure, then should establish fastener in addition.Image and control signal and power supply are by cable 4 transmission.9 is light source or observation assembly.

Fig. 4 laser slips into method sack cleaner leak detection synoptic diagram

10. fly-ash separator body 12. air-purifying chambers 13. ash buckets 4. are observed assembly 5. light sources;

All the other are narration in the lump in following specific embodiment.

Embodiment:

Embodiments of the invention use on the pulse bag type dust collector of filtration plant secondary smoke.The video camera of LASER Light Source and Varifocal zoom lens is inserted in the fly-ash separator respectively.Observe the installation of assembly and light source and see Fig. 4.During mensuration, with light source 5 irradiation AD directions, assembly 4 is observed in rotation makes sight line be scanned to BA by Bc earlier.If do not see scattered light, illustrate that then fly-ash separator is intact, filter bag does not have breakage.If on AD, found scattered light, illustrate that then there is leakage in filtrator, should further search.Method is: will observe assembly 4 earlier and be fixed on the Bc direction, rotary light source 5 shines AB from AD, finishes once and searches; The orientation (deciding) that turns clockwise and observe assembly on the visual angle of observing assembly, rotary light source 5 shines AB from AD; Repeat above step and can check the whole ABCD plane that finishes for 2-3 time.Because the wide-angle lens of video camera once can be observed about 40 ° scope.If video camera is in the BF direction, light source has been found scattered light in the AE direction, opens the laser instrument L that observes on the assembly this moment ₁, further adjust the orientation, make L ₁Hot spot just in time drop on the scattering point O, promptly be damaged filter bag below the O point.The laser instrument L that the position of O point outside fly-ash separator observed on the assembly 4 by light source 5 ₂And L ₄The light focus O ' that sends determines.Obviously, O ', O and actual spoilage filter bag are on a vertical line.After being checked through the position of damaged filter bag, the maintenance management personnel can open apart from the nearest top cover of O ' point and overhaul, and are very convenient.

Claims

1. laser slips into method sack cleaner leakage detection apparatus, it is characterized in that this device by light source, observe assembly and controller three parts are formed, light source and observe assembly respectively in diverse location insertion fly-ash separator.

2. according to the described device of claim (1), the described light source of its feature is made up of two groups of laser instruments and operating rod, can send the two bundles parallel visible light vertical with operating rod, and the laser instrument of operating rod end inserts in the fly-ash separator, when flue dust is arrived in its illumination, can produce scattered light.

3. according to the described device of claim (1), the described observation assembly of its feature is made up of video camera, two groups of laser instruments and operating rod, one group of laser instrument is installed in the end of operating rod near video camera, two groups of laser instruments all can send vertical with operating rod and with the video camera parallel visible light of two bundles in the same way.

4. according to the described device of claim (1), the described controller of its feature is made up of with the cable of light source, observation inter-module parts, display, power supply and the controller of control focal length of camera.

5. according to claim (2) or (3) described device, the described operating rod of its feature is made up of bitubular sleeve pipe and the locating flange and the retention mechanism that can move on outer tube, constitutes cooling jacket between the inner and outer pipe of bitubular sleeve pipe.