CN201776193U

CN201776193U - Guide vane type tornadotron with stepped slit of dust exhaust structure

Info

Publication number: CN201776193U
Application number: CN2010202212295U
Authority: CN
Inventors: 谭慧敏; ***; 亓成刚; 王新华; 金有海
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2010-05-31
Filing date: 2010-05-31
Publication date: 2011-03-30
Anticipated expiration: 2020-05-31

Abstract

The utility model provides a guide vane type tornadotron with a stepped slit of a dust exhaust structure, and comprises an inlet, an exhaust pipe, a separation pipe, a dust exhaust cone, an ash bucket and other components from top down; the lower part of the exhaust pipe is coaxially arranged at the upper part in the separation pipe; an integrated dust exhaust cone is arranged at the lower end of the separation pipe, and the dust exhaust cone is hermetically installed in the ash bucket; a stepped slit is formed on the upper edge of the circumference of the dust exhaust cone along the axis direction; the height trend of the stepped slit is the same with that of airflow swirling direction; and a back-mixing cone cover integrally connected with the lower end of the dust exhaust cone is arranged at the lower end of the dust exhaust cone. By adopting the utility model, the phenomena of back-mixing and entrainment existing at a dust exhaust port of the traditional cyclone are eliminated, particles can be discharged into the ash bucket in time, and the utilization rate of the slit and the separating efficiency are improved. The utility model has the advantages of small pressure drop, low energy consumption, abrasion resistance, scaling prevention and the like, thereby having wide application range, high separating efficiency, great operational flexibility and long service life.

Description

Dust outlet geometry has the guide vane cyclone tube of ladder seam

Technical field

The utility model relates to the guide vane cyclone tube that a kind of dust outlet geometry has the ladder seam, being applicable to catalyst separation recovery system and regenerated flue gas energy-recuperation system in petrochemical industry and the Coal Chemical Industry industry fluidization reaction regeneration device oil gas, is the tornadotron that catalyst and oil gas and flue gas are carried out centrifugation specifically.

Background technology

In the fluidization reaction regeneration device of petrochemical industry and Coal Chemical Industry industry, the energy-recuperation system of catalyst separation recovery system and the regenerated flue gas part that is absolutely necessary in the oil gas, third level cyclone separator is one of key equipment in these systems, and guide vane cyclone tube is again the most frequently used a type in the third level cyclone separator.General guide vane cyclone tube is made up of guider, blast pipe, separator tube and ash bucket at present.By gas phase flow field and granule density field in the at present general guide vane cyclone tube are discovered: dust-contained airflow enters to rotate under the effect of guider behind the tornadotron and goes downstream, at main separated space, particle is thrown toward the limit wall under action of centrifugal force, under the effect of pressure differential and descending air-flow, particle enters ash bucket from dust-exhausting port.But because ash bucket is airtight, the air-flow that enters ash bucket is on the counter steer of ash bucket bottom, carrying the particle that part separates in the ash bucket, forming the dust-exhausting port back-mixing carries secretly, separative efficiency is reduced, and cause that regional area is easy to wear, serial problem such as fouling and shortening in service life, have a strong impact on the subsequent technique device security.Dust-exhausting port place solid back-mixing carries phenomenon secretly and dust outlet geometry has direct relation, and reasonably dust outlet geometry helps alleviating even eliminates dust-exhausting port place back-mixing and carry phenomenon secretly.Find by investigation, some factory is by reducing the dust-exhausting port area, increase air-flow spin intensity in the tornadotron, the descending tolerance that control enters ash bucket, help improving separative efficiency, but there are a large amount of eccentric whirlpools near the dust-exhausting port, raise easily and roll near the particle that wall place, limit has separated the dust-exhausting port, the long-play wall that can wear and tear.

Summary of the invention

The purpose that the utility model dust outlet geometry has the guide vane cyclone tube of ladder seam is: by a kind of dust outlet geometry that has the ladder seam is provided, utilize the good shunting action of ladder seam, realization is to the control of Dual-Phrase Distribution of Gas olid field in the tornadotron, eliminate solid back-mixing and carry phenomenon secretly, minimizing is to the wearing and tearing of wall, improve separative efficiency, reduce the pressure loss, and applied widely.

The utility model dust outlet geometry has the guide vane cyclone tube of ladder seam, and it comprises parts such as import, blast pipe, separator tube, dust discharge awl and ash bucket from top to bottom; The coaxial top that is placed in separator tube of exhaust pipe lower part, separator tube lower end are provided with the dust discharge awl that is connected as a single entity, and the sealing of dust discharge awl is installed in the ash bucket, and axis direction has the ladder seam in dust discharge awl circumference upper edge, and ladder seam height trend is identical with the air-flow rotation direction; Be provided with the anti-back-mixing awl cover that is connected as a single entity in dust discharge awl lower end.

The utility model dust outlet geometry has the guide vane cyclone tube of ladder seam, and ladder stitches that α is oblique at a certain angle offers, and angle [alpha] is that ladder is sewn on perpendicular to the center line in the plane of axis with by the angle between the diameter of this center line and excircle intersection point; Have the ladder seam of two θ at an angle to each other on the dust discharge awl circumference, angle θ optimal value is 60 °～150 °, position on being sewn on axially along air-flow direction of rotation ladder descends gradually, being ladder distributes, but the overlapping area that guarantees ladder seam accounts for 8%～15% of the ladder seam gross area, the ladder seam gross area account for the dust discharge awl down open area 10%～30%.

The utility model dust outlet geometry has the guide vane cyclone tube of ladder seam, and the following bore of anti-back-mixing awl cover enlarges, and its cone angle is 60 °～130 °.

Advantage and good effect that the utility model dust outlet geometry has the guide vane cyclone tube of ladder seam are: by rational design, it is suitable to have area on the circumference of dust discharge awl, favorably situated ladder seam, ladder seam height trend is identical with the high dense band movement locus line of limit wall particle, very easily capture the dense ash band of Bian Bigao, can be in time the solid particle at limit wall place be entered ash bucket, effectively improve the utilization rate of dust discharge latasuture, this not only reduces wear, and has reduced the possibility of fouling; The dust discharge awl is opened the effect that the ladder seam also plays shunting, because the rotation direction of seam is identical with the air-flow rotation direction, is convenient to air-flow and discharges from latasuture, reduce the staggered mixing of dust discharge awl end opening place's up-downgoing air-flow, can reduce rotation vortex core asymmetry in the tornadotron, improve separative efficiency, reduce flow resistance; Again because the below of dust discharge awl is provided with anti-back-mixing awl cover, can prevent effectively that the fine grained of having collected in the ash bucket from being carried secretly by ascending air, enter tornadotron once more and form back-mixing and carry secretly, thereby further improve the separative efficiency of tornadotron.

Description of drawings

Fig. 1 has the guide vane cyclone tube aufbauprinciple schematic diagram of ladder seam for the utility model dust outlet geometry;

Fig. 2 has the partial cutaway schematic (amplification) of ladder seam for the dust discharge awl of aufbauprinciple schematic diagram 1;

Fig. 3 is the A-A generalized section (amplification) of Fig. 2;

1-import among the figure, 2-guider, 3-blast pipe, 4-separator tube, 5-dust discharge awl, the anti-back-mixing awl of 6-cover, 7-ash bucket, 8-ladder seam.

The specific embodiment

By Fig. 1～Fig. 3 as seen, the utility model dust outlet geometry guide vane cyclone tube of having a ladder seam comprises parts such as import 1, blast pipe 3, separator tube 4, dust discharge awl 5 and ash bucket 7; The coaxial top that is placed in the separator tube 4, blast pipe 3 bottoms, guider 2 is installed between blast pipe 3 and the separator tube 4; Guider 2 is made up of the along the circumferential direction evenly distributed formed runner that turns to of several guide vanes, and the dust-contained airflow rotation is gone downstream; Separator tube 4 lower ends are provided with the dust discharge awl 5 that is connected as a single entity, and 5 sealings of dust discharge awl are installed in the ash bucket 7, bore 5 circumference upper edge axis directions in dust discharge and have ladder seam 8; Bore 5 lower ends in dust discharge and be provided with the anti-back-mixing awl cover 6 that is connected as a single entity.

α is oblique at a certain angle offers for ladder seam 8, angle [alpha] is a ladder seam 8 perpendicular to the center line in the plane of axis with by the angle between the diameter of this center line and excircle intersection point, when angle α is 0 °, promptly vertically crack, and the maximum of angle α is the tangential direction along its inwall; The ladder seam 8 that has two θ at an angle to each other on 5 circumference is bored in dust discharge, angle θ optimal value is 60 °～150 °, descend gradually along air-flow direction of rotation ladder seam 8 position in the axial direction, being ladder distributes, but guarantee that two overlapping areas that are sewn on the sustained height place account for ladder and stitch 8%～15% of 8 gross areas, ladder stitches 8 gross areas and accounts for 10%～30% of 5 times open area of dust discharge awl.The following bore of anti-back-mixing awl cover 6 enlarges, and its cone angle is 60 °～130 °.

During use, import 1 is communicated with the collection chamber of ash-laden gas, ash-laden gas enters from import 1, form high speed rotary motion through guider 2 backs, most of dust granules is separated under action of centrifugal force, a dust-contained airflow part directly discharges from blast pipe 3, another part continues to flow downward, particle in separator tube 4 and dust discharge awl 5 because action of centrifugal force is concentrated the limit wall, form helical form ash band, ladder seam 8 height trends are identical with the high dense band movement locus line of limit wall particle, very easily capture helical form ash band, and the granule dust of limit wall directly stitches 8 by ladder and enters in the ash bucket 7 and be collected.Descending air-flow in the dust discharge awl 5 behind the isolation of purified is bored 5 bottoms in dust discharge and is turned back and upwards form air upflow, also turn back in ash bucket 7 bottoms through ladder seam 8 air-flows that enter ash bucket 7 and upwards to form air upflow, enter dust discharge awl 5 from anti-back-mixing awl cover 6, two strands of air upflows are finally discharged from blast pipe 3 upwards through separator tube 4.The outlet of blast pipe 3 upper ends is communicated with whole tapping equipment, and the guide vane cyclone tube that the utility model dust outlet geometry has the ladder seam can singlely use, and also can a plurality ofly make up.

The utility model dust outlet geometry has the guide vane cyclone tube of ladder seam, the back-mixing that solves the existence of existing separator dust-exhausting port place is carried phenomenon secretly, reduce equipment attrition, reduce pressure drop, improve separative efficiency, can be widely used in the oil gas of petrochemical industry and Coal Chemical Industry industry fluidization reaction regeneration device in catalyst separation recovery system or the regenerated flue gas energy-recuperation system catalyst being separated with oil gas or flue gas.

Claims

1. a dust outlet geometry has the guide vane cyclone tube that ladder stitches, and it comprises import (1), blast pipe (3), separator tube (4), dust discharge awl (5) and ash bucket parts such as (7) from top to bottom; The coaxial top that is placed in separator tube (4), described blast pipe (3) bottom, described separator tube (4) lower end is provided with the dust discharge awl (5) that is connected as a single entity, this dust discharge awl (5) sealing is installed in the ash bucket (7), axis direction has ladder seam (8) in described dust discharge awl (5) circumference upper edge, and this ladder seam (8) height trend is identical with the air-flow rotation direction; Be provided with the anti-back-mixing awl cover (6) that is connected as a single entity in dust discharge awl (5) lower end.

2. dust outlet geometry according to claim 1 has the guide vane cyclone tube of ladder seam, it is characterized in that described ladder seam (8) α be oblique at a certain angle offering, angle [alpha] for this ladder seam (8) perpendicular to the center line in the plane of axis with pass through angle between the diameter of this center line and excircle intersection point; Have the ladder seam (8) of two θ at an angle to each other on described dust discharge awl (5) circumference, angle θ optimal value is 60 °～150 °, descend gradually along air-flow direction of rotation ladder seam (8) position in the axial direction, being ladder distributes, but the overlapping area that guarantees ladder seam (8) accounts for 8%～15% of ladder seam (8) gross area, this ladder seam (8) gross area account for described dust discharge awl (5) down open area 10%～30%.

3. have the guide vane cyclone tube that ladder stitches according to claim 1 and 2 described dust outlet geometries, it is characterized in that the following bore of described anti-back-mixing awl cover (6) enlarges, its cone angle is 60 °～130 °.