CN105509042A - Cyclone separator dipleg - Google Patents
Cyclone separator dipleg Download PDFInfo
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- CN105509042A CN105509042A CN201410484220.6A CN201410484220A CN105509042A CN 105509042 A CN105509042 A CN 105509042A CN 201410484220 A CN201410484220 A CN 201410484220A CN 105509042 A CN105509042 A CN 105509042A
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- valve
- dipleg
- flutter
- valve body
- cyclone separator
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Abstract
The present invention relates to a cyclone separator dipleg, which comprises a dipleg 5, wherein the upper portion of the dipleg is connected to a cyclone separator, the lower portion of the dipleg is connected to a first wing valve and a second wing valve, the first wing valve and the second wing valve are arranged in an equal height parallel arrangement manner or upper-lower parallel arrangement manner, the wing valve comprises a valve body, a hanging column, a hanging ring and a valve plate, the hanging column is welded and fixed on the valve body, the valve plate is arranged on the valve body in a positioning manner through the hanging ring, the dipleg is connected to the valve body in a diameter reducing manner, and the diameter d of the valve body is 0.3-0.6 time the diameter D of the dipleg. According to the present invention, the two wing valves are arranged on the lower portion of the dipleg in the equal height parallel arrangement manner or upper-lower parallel arrangement manner, and the weights of the two wing valves are equal or unequal, such that the separation effect of the cyclone separator and the stability of the material discharge of the dipleg are improved, the operation working condition of the large mass flow rate change of the particles in the dipleg can be adapted, and the erosion wear problem of the wing valve and the valve plate can be prevented.
Description
Technical field
The invention belongs to gas-solid separation equipment technical field, relate to a kind of cyclone dip-leg, be specifically related to a kind of cyclone dip-leg of double-vane valve arrangement.
Background technology
Cyclone separator is one of visual plant of oil catalytic cracking unit, and usually connect dipleg in the bottom of cyclone separator and form the descending passage of particle, and arrange flutter valve in the bottom of dipleg, therefore dipleg and flutter valve are configured to the discharge system of cyclone separator.The effect of flutter valve is concentration and the reserve of catalyst in stable dipleg, and the Negative Pressure Difference between balance dipleg inside and the outside discharge space of flutter valve, has unidirectional discharge and avoid gas anti-channeling to enter dipleg, ensures the function of the normal operating of cyclone separator.Therefore, the performance of dipleg and flutter valve not only directly has influence on the separating effect of cyclone separator, and can interlock has influence on the normal operation of whole catalytic cracking unit simultaneously.
The dipleg size of cyclone separator designs according to the largest particles mass flowrate usually, and when catalytic cracking unit practical operation, altering a great deal of particle mass flux, can affect the separating effect of cyclone separator.Go into operation the initial stage at catalytic cracking unit, primary cyclone is because some operates reason, and most of catalyst granules is transferred to secondary cyclone, and the particle mass flux in secondary cyclone dipleg increases.Second-stage separator dipleg bottom is single flutter valve discharge, the suddenly increase of particle mass flux, single-blade valve can not discharge in time, cause dipleg to get clogged or in dipleg material level too high, the separative efficiency of cyclone separator significantly declines, and has had a strong impact on the stable operation of cyclone separator.Under quiet run working condition, particle mass flux is less than design load, and the discharge quantity in dipleg is little, and for semicanal discharge state or blow logical discharge state, the gas anti-channeling of dipleg outside enters dipleg, is formed and leaks out in a large number.Leaking out on the one hand causes the efficiency of cyclone separator to decline, and another aspect causes the erosive wear of flutter valve valve plate, and therefore, flutter valve can not be applicable to the particle mass flux operating mode changed greatly.Dipleg endoparticle mass flowrate is too low and too high, all can produce significant impact to the stability of cyclone separator and supporting dipleg and flutter valve system and reliability operation, needs to solve by carrying out reasonably design to this discharge system.
Summary of the invention
The object of this invention is to provide a kind of cyclone dip-leg, adapt to the operating mode that dipleg endoparticle mass flowrate excursion is larger, improve separative efficiency and the stability of cyclone separator, solve the problem of flutter valve valve plate wearing and tearing.
Cyclone dip-leg of the present invention, comprises dipleg 5, and dipleg top is connected with cyclone separator.The bottom of dipleg is connected with the first flutter valve and the second flutter valve, and the first flutter valve and the second flutter valve are that contour block form is arranged or height block form is arranged.First flutter valve is made up of No. 1 valve body, No. 1 davit, No. 1 suspension ring and No. 1 valve plate, and the second flutter valve is made up of No. 2 valve bodies, No. 2 davits, No. 2 suspension ring and No. 2 valve plates, and No. 1 davit and No. 2 davits are weldingly fixed on valve body.No. 1 valve plate passes through No. 1 suspension ring location and installation on No. 1 valve body, and No. 2 valve plates pass through No. 2 suspension ring location and installation on No. 2 valve bodies.Between dipleg 5 with No. 1 valve body, be undergauge mode between dipleg 5 with No. 2 valve bodies and be connected.
When first flutter valve and the contour block form of the second flutter valve are arranged, be provided with dividing plate in dipleg bottom, the discharge entrance of dividing plate and the first flutter valve and the second flutter valve is separated.The height H of dividing plate is 1.0 ~ 3.0 times of the diameter D of dipleg, i.e. H/D=1.0 ~ 3.0.When height block form is arranged, the height distance L between the first flutter valve and the second flutter valve is 2.0 ~ 5.0 times of the diameter D of dipleg, i.e. L/D=2.0 ~ 5.0.The weight of No. 1 valve plate is 1/3 ~ 1.0 times of the weight of No. 2 valve plates.The diameter d of No. 1 valve body and No. 2 valve bodies is 0.3 ~ 0.6 times of the diameter D of dipleg 5, i.e. d/D=0.3 ~ 0.6.
Cyclone dip-leg of the present invention increases a flutter valve on traditional single-blade valve arrangement basis, and two flutter valves adopt height block form arrange or adopt contour block form to arrange.Adopt diameter reduced to be connected between dipleg with flutter valve valve body, the diameter of flutter valve valve body drainage conduit is less than the diameter of top dipleg.After undergauge, particle flowing in full-section pipe-flow in flutter valve valve body, forms the lock airway dysfunction of dipleg discharge, prevents flutter valve outer gas stream from carrying catalyst granules and scurries into the erosive wear that cyclone dip-leg causes valve plate.The valve plate weight configuration of two flutter valves becomes equal or unequal, a flutter valve discharge can be realized neatly according to the change of dipleg endoparticle mass flowrate, another flutter valve closes, or the operation of two flutter valves discharge simultaneously, adapt to the operation operating mode of dipleg endoparticle mass flowrate change, improve cyclone separator separating effect and operational stability.
Compared with the single-blade valve discharging structure of existing cyclone dip-leg bottom, the present invention is by arranging two flutter valves in the bottom of dipleg, the operating mode that dipleg endoparticle mass flowrate excursion is larger can be adapted to, improve the separative efficiency of cyclone separator and the stability of dipleg discharge.Dipleg endoparticle flow hour, single-blade valve works, and another flutter valve closes, and prevents air-flow from carrying catalyst granules and scurries into cyclone dip-leg, solves the problem of flutter valve valve plate wearing and tearing.Between dipleg with valve body, undergauge mode is connected, the diameter of valve body drainage conduit is less than top dipleg diameter, gas-solid mixture is had in valve body, and granule density is large, degassing rate is fast, close phase full packages flows and material blocks airway dysfunction, efficiently solve the problem to valve plate erosive wear that grain mass flowrate in dipleg is little, valve port semicanal discharge causes material envelope scarce capacity to cause, ensure the normal operation of cyclone separator.Two flutter valves height block forms or contour block form are arranged, two valve plates are equal in weight or unequal configuration, improve the flexibility of dipleg discharge and selective, adapt to dipleg endoparticle mass flowrate and change large operation operating mode.
Accompanying drawing explanation
Fig. 1 is the structural representation of cyclone dip-leg of the present invention;
Fig. 2 is the structural representation of another program of the present invention;
The view that Fig. 3 is height block form double-vane valve dipleg first flutter valve discharge, the second flutter valve is closed;
The schematic diagram of discharge while that Fig. 4 being height block form double-vane valve dipleg two flutter valves;
The view that Fig. 5 is contour block form double-vane valve dipleg first flutter valve one discharge, the second flutter valve two is closed;
The schematic diagram of discharge while that Fig. 6 being contour block form double-vane valve dipleg two flutter valves;
Fig. 7 be the flutter valve of single-blade valve dipleg at discharging channel place the poorly sealed schematic diagram causing valve plate to seal binding face surrounding gap air leak.
Wherein:
1-1 valve plate, 2-2 valve plate, 3-1 valve body, 4-2 valve body, 5-dipleg, 6-dividing plate, 7-1 davit, 8-1 suspension ring, 9-2 davit, 10-2 suspension ring.
Detailed description of the invention
Be described further the present invention below in conjunction with embodiment, scope is not limited to embodiment, and any change that those skilled in the art make in the scope that claim limits also belongs to the scope of protection of the invention.
Embodiment 1
As shown in Figure 1, comprise dipleg 5, first flutter valve and the second flutter valve, dipleg top is connected with cyclone separator cyclone dip-leg of the present invention, and the first flutter valve and the second flutter valve are connected to the bottom of dipleg, and the first flutter valve and the second flutter valve are that height block form is arranged.First flutter valve is made up of No. 1 valve body 3, No. 1 davit 7, No. 1 suspension ring 8, No. 1 valve plate 1, and the second flutter valve is made up of No. 2 valve bodies 4, No. 2 davits 9, No. 2 suspension ring 10, No. 2 valve plates 2, and No. 1 davit and No. 2 davits are weldingly fixed on valve body.No. 1 valve plate passes through No. 1 suspension ring location and installation on No. 1 valve body, and No. 2 valve plates pass through No. 2 suspension ring location and installation on No. 2 valve bodies.For undergauge mode is connected between dipleg with No. 1 valve body, between dipleg with No. 2 valve bodies; The diameter d of No. 1 valve body and No. 2 valve bodies is 0.5 times of the diameter D of dipleg.The weight of No. 1 valve plate is 0.6 times of the weight of No. 2 valve plates.Height distance L between first flutter valve and the second flutter valve is 3.0 times of the diameter D of dipleg.
When dipleg endoparticle mass flowrate is lower, a flutter valve discharge, sets up enough close phase full-section pipe-flow material envelope abilities, prevents anti-channeling air-flow from carrying the erosive wear of catalyst granules to valve plate in valve body.When dipleg endoparticle mass flowrate is higher, two flutter valves discharge simultaneously, prevent the problem that the dipleg that in dipleg, material envelope excessive height causes blocks, especially occur abnormal for device operation, under the operating mode of larger change occurs the grain flux be separated, the stability of cyclone separator operation and dipleg discharge can be ensured.
The valve plate weight of two flutter valves is unequal, height block form is arranged in dipleg bottom, size variation with the particle mass flux in dipleg carries out single-blade valve or double-vane valve discharge, ensure full packages flowing in flutter valve valve body, prevent from anti-channeling gas from carrying particle to wear and tear to valve plate, the obstructing problem that dipleg discharge in particle mass flux increasing situation is suddenly not smooth can be prevented again on the other hand, the stable operation of cyclone separator can be ensured.The discharge situation that first flutter valve discharge when Figure 3 shows that dipleg endoparticle flow is low, the second flutter valve are closed, the first flutter valve when Figure 4 shows that dipleg endoparticle flow is large, second wing open the situation of valve plate discharge simultaneously.
Embodiment 2
As shown in Figure 2, comprise dipleg 5, first flutter valve and the second flutter valve, dipleg top is connected with cyclone separator another embodiment of the present invention, and the first flutter valve and second wing are connected to the bottom of dipleg, and the first flutter valve and the second flutter valve are that contour block form is arranged.Dipleg 5 bottom is provided with dividing plate 6, is separated by the discharge entrance of dividing plate and the first flutter valve and the second flutter valve.The height H of dividing plate 6 is 1.0 ~ 2.0 times of the diameter D of dipleg 5.The diameter d of No. 1 valve body and No. 2 valve bodies is 0.4 times of the diameter D of dipleg.The weight of No. 1 valve plate is 0.5 times of the weight of No. 2 valve plates.Height distance L between first flutter valve and the second flutter valve is 2.5 times of the diameter D of dipleg.
As shown in Figure 5, when in cyclone dip-leg, particle mass flux is less, first flutter valve (light valve plate wing valve) discharge of the dipleg of contour side-by-side configuration, second flutter valve (heavy valve plate wing valve) is closed, catalyst granules flows in close phase full-section pipe-flow in the valve body of the first flutter valve, form the lock airway dysfunction of dipleg discharge, when preventing discharge, anti-channeling air-flow carries catalyst granules and carries out erosive wear to valve plate.When dipleg endoparticle mass flowrate is higher, as shown in Figure 6, the first flutter valve and the second flutter valve are opened valve plate simultaneously and are carried out discharge.The problem that double-vane valve discharge can prevent the dipleg that in dipleg, material envelope excessive height causes from blocking, especially abnormal for plant running, too much granule materials enters dipleg by cyclone separator, second level cyclone dip-leg endoparticle mass flowrate is caused suddenly to increase, dipleg discharge is caused freely not produce the problem of obstruction, the while of two flutter valves, discharge can effectively solve the problem, and ensures cyclone separator and discharge system stable operation thereof.
Claims (6)
1. a cyclone dip-leg, comprise dipleg (5), dipleg top is connected with cyclone separator, it is characterized in that: the bottom of described dipleg is connected with the first flutter valve and the second flutter valve, and the first flutter valve and the second flutter valve are that contour block form is arranged or height block form is arranged; Described first flutter valve is made up of No. 1 valve body (3), No. 1 davit (7), No. 1 suspension ring (8), No. 1 valve plate (1), second flutter valve is made up of No. 2 valve bodies (4), No. 2 davits (9), No. 2 suspension ring (10), No. 2 valve plates (2), and No. 1 davit and No. 2 davits are weldingly fixed on valve body; Described No. 1 valve plate is by No. 1 suspension ring location and installation on No. 1 valve body, and described No. 2 valve plates pass through No. 2 suspension ring location and installation on No. 2 valve bodies; For undergauge mode is connected between dipleg (5) with No. 1 valve body (3), between dipleg (5) with No. 2 valve bodies (4).
2. cyclone dip-leg according to claim 1, is characterized in that: when the first flutter valve and the contour block form of the second flutter valve are arranged, be provided with dividing plate (6), separated by the discharge entrance of dividing plate first flutter valve and the second flutter valve in dipleg (5) bottom.
3. cyclone dip-leg according to claim 2, is characterized in that: the height H of described dividing plate (6) is 1.0 ~ 3.0 times of the diameter D of dipleg (5).
4. cyclone dip-leg according to claim 1, is characterized in that: the weight of described No. 1 valve plate (1) is 1/3 ~ 1.0 times of the weight of No. 2 valve plates (2).
5. cyclone dip-leg according to claim 1, is characterized in that: when height block form is arranged, the height distance L between the first flutter valve and the second flutter valve is 2.0 ~ 5.0 times of the diameter D of dipleg (5).
6. cyclone dip-leg according to claim 1, is characterized in that: the diameter d of No. 1 valve body (3) and No. 2 valve bodies (4) is 0.3 ~ 0.6 times of the diameter D of dipleg (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410484220.6A CN105509042B (en) | 2014-09-22 | 2014-09-22 | A kind of cyclone dip-leg |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410484220.6A CN105509042B (en) | 2014-09-22 | 2014-09-22 | A kind of cyclone dip-leg |
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| Publication Number | Publication Date |
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| CN105509042A true CN105509042A (en) | 2016-04-20 |
| CN105509042B CN105509042B (en) | 2017-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410484220.6A Active CN105509042B (en) | 2014-09-22 | 2014-09-22 | A kind of cyclone dip-leg |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5101855A (en) * | 1990-11-30 | 1992-04-07 | Exxon Research And Engineering Company | Cyclone having circular trickle valve assembly |
| CN102261480A (en) * | 2010-11-29 | 2011-11-30 | 中国石油大学(北京) | Folding valve plate wing valve |
| CN202209451U (en) * | 2011-09-07 | 2012-05-02 | 中国石油大学(北京) | Arc valve plate wing valve |
| CN102818262A (en) * | 2012-08-24 | 2012-12-12 | 上海锅炉厂有限公司 | Double-outlet material return device of circulating fluidized bed boiler |
-
2014
- 2014-09-22 CN CN201410484220.6A patent/CN105509042B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5101855A (en) * | 1990-11-30 | 1992-04-07 | Exxon Research And Engineering Company | Cyclone having circular trickle valve assembly |
| CN102261480A (en) * | 2010-11-29 | 2011-11-30 | 中国石油大学(北京) | Folding valve plate wing valve |
| CN202209451U (en) * | 2011-09-07 | 2012-05-02 | 中国石油大学(北京) | Arc valve plate wing valve |
| CN102818262A (en) * | 2012-08-24 | 2012-12-12 | 上海锅炉厂有限公司 | Double-outlet material return device of circulating fluidized bed boiler |
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| Publication number | Publication date |
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| CN105509042B (en) | 2017-10-10 |
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