CN2840002Y

CN2840002Y - Non-power cyclone separating fly ash sampler mounted on flue

Info

Publication number: CN2840002Y
Application number: CN 200520079395
Authority: CN
Inventors: 郑忠信
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-09-16
Filing date: 2005-09-16
Publication date: 2006-11-22
Anticipated expiration: 2015-09-16

Abstract

The utility model relates to a non-power cyclone separating fly ash sampler mounted in a flue, which is provided with an outer sleeve, wherein the upper end and the lower end of the outer sleeve are sealed. A flue gas sampling inlet is arranged on the cylinder wall on the upper part of the outer sleeve; the upper part in the outer sleeve is provided with an exhaust tube which threads out an upper gland; an ash receiving funnel is arranged below the exhaust tube in the outer sleeve; the lower end of the ash receiving funnel is connected with an ash guiding tube which threads out a lower gland. The utility model adopts a structure of the non-power cyclone separating sampler which can be inserted in the flue, the high temperature in the flue can efficiently prevent the tube wall in the sampler from dew condensation in order to break the condition of forming hardening, and the utility model can not be clogged any more. Meanwhile, the utility model also has the advantages of simple structure and easy installation.

Description

Be installed in the unpowered cyclonic separation fly ash sampler in the flue

Affiliated technical field

The utility model relates to a kind of fly ash sampler that is used for power plant boiler unburned carbon in flue dust monitoring system, particularly a kind of unpowered cyclonic separation fly ash sampler that is installed in the flue.

Background technology

At present, the fly ash sampler that extensively adopts in external is a kind of unpowered cyclonic separation sampler, referring to Fig. 2,3, it has one and is located at the outer funnel-form shell 11 of flue, on the sidewall of this shell, be provided with a gas sampling probe 12, the front end of this stopple coupon stretches into flue 10, and its inlet is met the direction to flow of flue gas, make flue gas flow into stopple coupon from the stopple coupon inlet, the tail end and the case peripheral wall of this stopple coupon are tangentially joined, and as shown in Figure 3, the flue gas that makes stopple coupon 12 import shell can be walked along the rotation of shell internal perisporium, in this shell, be provided with an exhaust tube 13, flue 10 is inserted in the upper end of this exhaust tube, because the negative pressure of flue forms draft by 13 pairs of shells of exhaust tube 11, then tangentially enter the flue gas of shell 11 around the spiral decline of exhaust tube from stopple coupon, from the extraction of bleeding, in this process, the flying dust in the flue gas falls because of gravity then, and the derivation of the funnel of suitable shell lower end, obtain ash sample.The problem that this fly ash sampler exists is: be installed in the flue outside, be easy to often be subjected to the influence of weather temperature reduction, formation of a specified duration is stopped up.This is because the flue gas in the flue is subjected to the influence of atmosphere humidity or steam blowing burner hearth moisture, its humidity is bigger, therefore, when the same day, the temperature degree was lower than close dew temperature, its shell 11 can be caught a cold and dewfall with gas sampling probe 12 that is connected with shell and exhaust tube 13, at this moment flying dust and dew mix mutually and generate mud and on the inwall in the shell-and-tube road outside of hardening, because of containing considerable calcium oxide (CaO) composition in the flying dust, they are easy to suction and generate calcium hydroxide (being white lime), add the effect of great amount of carbon dioxide in the flue gas and generate hard lime carbonate, thereby increased the hardness that hardens, year in and year out, its thickness that hardens day by day increases, and finally blocks inner chamber fully, and monitoring can't be carried out.

The utility model content

The purpose of this utility model is at the problem in the prior art, a kind of unpowered cyclonic separation fly ash sampler that is installed in the flue is provided, thereby prevent dewfall in the sampler and form and harden, overcome the obstruction of sampler, make the sampler can stable for a long time work and be not subjected to the weather Temperature Influence.

For achieving the above object, solution of the present utility model is as follows:

It has the outer sleeve of a upper/lower terminal sealing, on the barrel on described outer sleeve top, have a smoke sampling inlet, top in outer sleeve is provided with an exhaust tube that passes upper cover, in outer sleeve exhaust tube below be provided with a water collecting funnel, be connected with an ash guiding pipe in the water collecting funnel lower end, this ash guiding pipe passes down capping.

The further improvement project of the utility model is:

Be provided with a flange arrangement on the outer wall of described outer sleeve bottom, this flange arrangement is made of ring flange and the fastening bolt that a flange seat that is fixed on outer sleeve flue mounting hole place and connect firmly on the sleeve outer wall outside.

By above-mentioned solution as can be seen, the utility model has adopted a kind of unpowered cyclonic separation sampler structure that inserts flue, then the high temperature in the flue can prevent the dewfall of sampler inner tubal wall effectively, thereby has destroyed the condition that hardens and form, and makes it can not form obstruction again.Simultaneously, the utility model is also signed an undertaking, and structure is simple, installation is easy to advantage.

Description of drawings

Fig. 1, one-piece construction of the present utility model and scheme of installation.

Fig. 2, existing unpowered cyclonic separation sampler.

The A-A diagrammatic cross-section of Fig. 3, Fig. 2.

Embodiment

Describe structure of the present utility model and principle of work in detail according to embodiment below.

Referring to Fig. 1, it has an outer sleeve 1, is provided with a upper cover 2 on described outer sleeve top, described exhaust tube 3 inserts the outer sleeve from upper cover, and is weldingly fixed on the upper cover 2; Have a smoke sampling inlet 1-1 on the barrel on outer sleeve 1 top, this smoke sampling inlet can be rectangular opening or circular port etc.; In outer sleeve 1 exhaust tube 3 below be provided with a water collecting funnel 4, be connected with an ash guiding pipe 5 in the lower end of water collecting funnel 4, this ash guiding pipe 5 passes down capping 9, and be weldingly fixed on down in the capping 9, the lower end of described outer sleeve is provided with a flange 8, the lower port of following capping 9 closed outer casing tubes 1, and by being bolted on the flange 8; Instantly after capping was fixing, water collecting funnel 4 and ash guiding pipe 5 also obtained radial and axial location.This sampler can be inserted flue outside the flue mounting hole, its fixed form can adopt welding or flange to fix.The flange fixed sturcture is made of the flange seat 7 that is located at outer sleeve 1 bottom and ring flange 6 and fastening bolt, and wherein flange seat 7 is weldingly fixed on the mounting hole place of flue 10, and ring flange 6 is welded on the outer wall of outer sleeve.During installation, earlier this sampler is inserted flue 10, and the actinal surface and the flow of flue gas direction of the smoke sampling inlet 2 on outer sleeve top are formed an angle, and then advance, ring flange 6 and flange seat 7 are joined, use bolt again, then this sampler formula of being inserted into is fixed in the flue, this flange fixed form can make the installation and removal of sampler convenient.

The direction of inserting paper among the figure is the direction of flow of flue gas, the actinal surface of described smoke sampling inlet 1-1 preferably becomes 30 °～45 ° angles with this flow of flue gas direction, like this, when flow of flue gas, it can tangentially enter in the outer sleeve 1 along outer sleeve wall, simultaneously, the flue gas that flows is also from the upper port horizontal flow mistake of exhaust tube 3, then, form negative pressure in the outer sleeve, make exhaust tube have draft according to hydromechanical Bei Nuli law, like this, the flue gas that tangentially enters in the outer sleeve can be around the spiral decline of exhaust tube under the effect of exhaust tube draft, and then extract out by exhaust tube, in this course, flying dust in the flue gas falls naturally because of gravity, collected by water collecting funnel 4, and pass through ash guiding pipe 5 derivation, thereby finish the Fly ash sampling function of unpowered cyclonic separation.Because this sampler integral body all is installed in the high-temperature flue more than 100 ℃, therefore, wall forms the dewfall phenomenon within it, has prevented the formation of hardening, and has avoided obstruction, thereby has guaranteed the long-term normal and stable operation of sampler.

Claims

1, a kind of unpowered cyclonic separation fly ash sampler that is installed in the flue, it is characterized in that: it has the outer sleeve (1) of a upper/lower terminal sealing, on the barrel on described outer sleeve top, have a smoke sampling inlet (1-1), top in outer sleeve (1) is provided with an exhaust tube (3) that passes upper cover (2), the below of exhaust tube in outer sleeve (3) is provided with a water collecting funnel (4), be connected with an ash guiding pipe (5) in water collecting funnel (4) lower end, this ash guiding pipe (5) passes down capping (9).

2, the unpowered cyclonic separation fly ash sampler that is installed in the flue according to claim 1, it is characterized in that: be provided with a flange arrangement on the outer wall of described outer sleeve (1) bottom, this flange arrangement is made of a flange seat (7) and a ring flange (6) and a fastening bolt that connects firmly on outer sleeve (1) outer wall that is fixed on outer sleeve flue mounting hole place.