CN106492570A - A kind of catalytic cracking fourth stage cyclone separator arrangement - Google Patents
A kind of catalytic cracking fourth stage cyclone separator arrangement Download PDFInfo
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- CN106492570A CN106492570A CN201510563142.3A CN201510563142A CN106492570A CN 106492570 A CN106492570 A CN 106492570A CN 201510563142 A CN201510563142 A CN 201510563142A CN 106492570 A CN106492570 A CN 106492570A
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- gas
- rotations
- catalytic cracking
- cyclone separator
- storage tank
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Abstract
A kind of catalytic cracking fourth stage cyclone separator (referred to as four rotations) arrangement, the four rotations system include the critical pieces such as three rotation drainage conduits, storage tank, four precession tracheas, four rotations.Storage tank top dilute phase space is provided with a vertical clapboard, storage tank dilute phase space is divided into inertial separation area and settlement separate area, ash-laden gas in three rotation drainage conduits is accessed from the top of inertial separation area, after respectively through inertia and settlement separate area, four rotations are entered again from four precession tracheas being arranged at the top of settlement separate area, through the critical spray nozzle that the gas after four rotation dedustings enters downstream, the isolated solid particle of four rotations then enters the storing pot bottom bed of material along dipleg；Using the difference of gas and solid particle inertia, inertial separation area realizes that gas solid separation, settlement separate area realize gas solid separation using relatively low section gas speed, by above two granule pre-separation measure, in order to reduce by four screw-in mouth granule densities and segregational load；Four spin material leg particle outlets arrange air locking machine structure, in order to avoid gas anti-channeling and the guarantee steady conveying of granule in dipleg in dipleg.
Description
Technical field
The present invention relates to a kind of catalytic cracking fourth stage cyclone separator arrangement, category petrochemical technology neck
Domain.
Background technology
In refinery catalytic cracking unit, third-stage cyclone separator (hereinafter referred to as three rotations) is regenerator
The visual plant of high-temperature flue gas catalyst granules separation and recovery, and ensure cigarette captain's periodic duty, avoid urging
The key equipment of catalyst particles erosive wear cigarette machine blade.In three rotation systems, higher in order to make it have
Particle capture efficiency, sets up and is equipped with a critical spray nozzle, to control a small amount of flue gas (3～5%) from three rotation ash buckets
Middle extraction, the finely grained catalyst that three rotations are separated enter storage tank in the lump with this partial fume.This part
Flue gas is generally before critical spray nozzle is entered firstly the need of one fourth stage cyclone separator (hereinafter referred to as four of entrance
Rotation), so that flue gas is separated with solid particle.In four traditional rotation piece-rate systems, three rotation ash buckets release
Ash-laden gas initially enters storage tank, then introduces four from the top of storage tank and revolve, and the solid particle that isolates is through four
Spin material leg is back to bulk cement storage tank, and the high-temperature flue gas after separating then are drawn from four rotation upper outlets, enter downstream
Critical spray nozzle, is ultimately discharged into flue gas main air duct.But, this rotation of quasi-tradition four system is applied in many refineries
There is the situation of the frequent heavy wear of critical spray nozzle in Shi Jingchang, causes for three rotation working times reduced, plant energy consumption
Increase.When more serious, can also cause cigarette machine blade damaged, cause leaf longevity and cigarette machine on-stream time to shorten.
Wang Rui et al. carries out numerical simulation discovery to gas phase three-dimensional flow field in traditional four rotations system, and storage tank is oval
End socket and conical baffled between region in gas speed higher, cause partial particulate to be directly brought into four screw-ins by gas
Mouthful.In addition, there is stronger descending air-flow at conical baffled base opening, this portion gas finally will also be from taper
Baffle plate base opening is returned, and partial particulate can be affected smoothly to be settled down to the storing pot bottom bed of material, finally directly short
Road enters four and revolves；Or portion gas anti-channeling enters four spin material legs, the granule for causing four rotations to be isolated cannot be normal
Discharge.According to above analysis, they propose for three rotation drainage conduits to screw in mouth direct connection with four, and in storing tank deck
Pressure-equalizing pipe is set between portion and four screw outlets.The improved structure to some extent solves four spin material legs and alters
The problem of gas, but still suffer from that four screw-in mouth granule densities are too high, the settlement separate function of dilute phase space in storage tank
Under-utilized problem, increases the workload of four rotations.
Content of the invention
The present invention is on the basis of existing technology, proposes a kind of new rotation arrangement of catalytic cracking four,
Main thought of improving includes：The baffle arrangement with inertial separation is set up in storage tank, makes ash-laden gas elder generation
Through inertial separation, storage tank dilute phase space is recycled to carry out settlement separate, finally entering back in four rotations is carried out
Centrifugation, by above two pre-separation measure, can be greatly lowered the granule density of four screw-in mouths；?
Set up air locking machine structure in four spin material leg ends, it is to avoid gas affects the normal discharge of granule from dipleg anti-channeling.Pass through
Above-mentioned measure, can be greatly lowered the granule density entered in critical spray nozzle flue gas, so as to reduce granule
Erosive wear speed simultaneously extends the service life of critical spray nozzle.Concrete technical scheme is as follows：
Tradition of dismantling four revolve conical baffled in system storage tank, at an upper portion thereof dilute phase space set up one vertically every
Storage tank dilute phase space is divided into inertial separation area and settlement separate area by plate.Dust-laden in three rotation drainage conduits
Flue gas is accessed from the top of inertial separation area, respectively through inertia and settlement separate area after, then from being arranged on sedimentation
Four precession tracheas at the top of Disengagement zone enter four and revolve, through the critical spray nozzle that the gas after four rotation dedustings enters downstream,
The isolated solid particle of four rotations then enters the storing pot bottom bed of material along dipleg.Inertial separation area utilizes gas
Realize that gas solid separation, settlement separate area are realized using relatively low section gas speed with the difference of solid particle inertia force
Gas-solid is settlement separate, by above two granule pre-separation measure, in order to reduce by four screw-in mouth granule densities and
Segregational load.Four spin material leg particle outlets arrange air locking machine structure, in order to avoid gas anti-channeling and guarantor in dipleg
Barrier steady conveying of the granule in dipleg.
For ensureing more preferable granule pre-separation effect, inertial separation area gas cross section gas speed scope is 0.5～1.5
M/s, gas approach pipe distance vertical clapboard farther out, vertical clapboard lower end apart from storing pot bottom highest material position not
It is less than 0.5～2.0m.Settlement separate area section gas speed scope is less, is 0.02～0.2m/s.In addition, three rotations
Drainage conduit should be arranged on the one end apart from vertical clapboard farther out as far as possible, and four precession tracheas are then arranged on distance
The vertical clapboard other end farther out, in order to further to strengthen inertia and settlement separate effect.
The air locking machine structure that four spin material leg particle outlets are arranged can be both mechanical flutter valve or weighted valve, also may be used
Being non-mechanical L-type valve or V-shaped valve.In addition, being pointed to storing pot bottom for further reducing gas
The elutriation entrainment effect of separated solid-granular material layer, can be setting up one above the solid particle bed of material
Layer or multilamellar have the horizontal grate baffle plate of certain inertial separation function, and preferred structure is with dihedral vane
Horizontal grate, such as BAIYE window grid.
It is an advantage of the invention that the inertia of storage tank dilute phase space and settlement separate function can be made full use of, from
And reduce by four and screw in mouth granule density, reduce by four and revolve segregational load；Further by setting up dipleg air locking machine structure,
Ensure the normal discharge of four spin material legs.Be finally reached be lowered into critical spray nozzle flue gas particle concentration, extend critical
Nozzle service life and the purpose of three rotation effective times.
Description of the drawings
Fig. 1 is that tradition four revolves system typical structure.
Fig. 2 is a kind of typical structure pattern of new four rotations system proposed by the present invention.
Fig. 3 is a kind of typical structure pattern of another kind of new four rotations system proposed by the present invention.
Fig. 4 is also a kind of typical structure pattern of another kind of new four rotations system proposed by the present invention.
Fig. 5 is the schematic partial cross-sectional view of BAIYE window grid in Fig. 4.
1. 3 rotation in figure, 2. three rotation drainage conduits, 3. conical baffled, 4. storage tank, and 5. bearing, 6. unloads
Material mouth, 7. four spin material leg, 8. four rotation, 9. four precession trachea, 10. four rotation exhaustor, 11. vertical clapboards,
12. flutter valves, 13.L type valves, 14. loosen airduct, 15. BAIYE window grids, 16. dihedral vanes.
Specific embodiment
A kind of proposed by the invention catalytic cracking fourth stage cyclone separator is further illustrated below in conjunction with the accompanying drawings
The specific implementation method of arrangement, but the present invention is not therefore subject to any restriction.
Comparative example 1
Fig. 1 gives the typical structure pattern that tradition four revolves system, as illustrated, tradition four revolves piece-rate system
Including four rotations (8) and (4) two primary structures of storage tank, the ash-laden gas that three rotation (1) ash buckets release is first
Conical baffled (3) region on storage tank (4) top is first entered through three rotations drainage conduit (2), then from storage tank
(4) introduce four rotations (8) through four precession tracheas (9) at the top of to be centrifuged, the fine grained warp that isolates
Four spin material legs (7) are back to storage tank (4).Flue gas after separation screws on portion's exhaustor (10) from four
Draw, enter the critical spray nozzle in downstream, critical spray nozzle plays a part of to control the flow that flue gas is released in this part,
The flue gas for flowing through critical spray nozzle finally enters main flue gas pipeline.
In traditional four rotations system, the effect of storage tank (4) inner conical baffle plate (3) is to reduce storage tank
(4) reentrainment of interior sedimented particle, but, most of flue gas is limited in storage tank (4) also
In the confined space of conical baffled (3) and ellipsoidal head between so that in the space, gas velocity is larger,
The time of staying of the flue gas in storage tank (4) is caused significantly to shorten.Its side effect as shown by arrows in FIG., can
Partial particulate is caused directly to be brought into four rotations (8) entrance by gas.In addition, portion gas are directly kept off from taper
Plate (3) base opening is to dirty, but this portion gas finally will be also returned from conical baffled (3) base opening, this meeting
Cause partial particulate smooth cannot be settled down to downwards the storing pot bottom bed of material, possible short circuit is directly entered four precessions
Trachea (9).Further, since four spin material legs (7) particle outlet is not provided with air locking machine structure, portion gas are then
Can anti-channeling enter four spin material legs (7), cause the detached granule of four rotations (8) cannot normal discharge.
Embodiment 1
Fig. 2 gives a kind of typical structure pattern of new four rotations system proposed by the present invention, and shown in Fig. 1
Tradition four rotation system unlike：Tradition of having dismantled in the structure four revolves system storage tank (4) inside
Conical baffled (3), and one piece of vertical clapboard (11) is additionally arranged on the top of storage tank (4).Here, will
Storage tank (4) top, the definition space on the left of vertical clapboard (11) are inertial separation area；By storage tank (4)
Top, the definition space on the right side of vertical clapboard (11) are settlement separate area.Three rotation drainage conduit (2) outlets set
Put apart from vertical clapboard (1) farther out, close on the side of storage tank (4) wall.Due to three rotations drainage conduit (2)
Interior air-flow speed is larger, after entering the inertial separation space in left side, as circulation area increases suddenly, granule
Can be preferential downstream to storage tank (4) bottom sedimented particle layer in the presence of inertia, and gas inertia is less,
Then section gas can be entered by passage between vertical clapboard (11) and the bottom bed of material fast lower settlement separate
Space, as gas speed further reduces, partial particulate gradually can settle down.Four precession tracheas (9) and heavy
Drop connects at the top of Disengagement zone, is arranged on one end farther out apart from vertical clapboard (11) so that flue gas fully enters
Enter settlement separate space, also for the settlement separate effect of further reinforcing particle.Through the two spaces
Inertia and centrifugation, in gas, most solid particle has been separated, and this will certainly be significantly
Degree reduces by four and revolves (8) entrance granule density.In addition, in order to avoid gas is from anti-channeling in four spin material legs (7),
The normal discharge of granule being affected, flutter valve (12) being provided with four spin material legs (7) outlet, it is normal in industry
A kind of mechanical lock mechanism of qi structure, but, another kind of common mechanical lock mechanism of qi structure weighted valve
Can be used herein.
It is to ensure that there is higher granule pre-separation efficiency, inertial separation area section gas speed (the i.e. total tolerance of flue gas
Ratio with the zone level cross-sectional flow area) scope be 0.5～1.5m/s, vertical clapboard (11) lower end
0.5～2.0m is not less than apart from storing pot bottom highest material position.Settlement separate area section gas speed scope is less, is
0.02～0.2m/s.
Embodiment 2
Fig. 3 give proposed by the present invention new four rotation system another kind of typical structure patterns, generally with
Structural shape shown in Fig. 2 is consistent, and difference is, four spin material legs (7) bottom is provided with a L-type
Valve (13), this are a kind of common non-mechanical dipleg air locking machine structure, equally, other similar non-mechanicals
Dipleg air locking machine structure, such as V-shaped valve, it is also possible to which here is used.In order to ensure the normal work of this kind of non-mechanical valve
Make, need loosening airduct (14) is arranged in this kind of non-mechanical valve, continuously loosened by being input into one
Air-flow, to ensure the smooth discharge and normal lock airway dysfunction of granule.
Embodiment 3
Fig. 4 give proposed by the present invention new four rotation system another kind of typical structure patterns, generally with
Structural shape shown in Fig. 3 is consistent, and difference is, storage tank (4) bottom is provided with one layer of shutter
Grid (15), this layer of grid (15) are arranged on the top of the highest possible bed of material position in storage tank (4) bottom,
Apart from highest possible 0.05～0.5m of bed of material surface.Fig. 5 gives the part section of BAIYE window grid (15)
Schematic diagram, just because of the effect of its dihedral vane (16), can be in the situation of the circulation for not affecting gas
Under play function to partial particulate inertial separation, be pointed to storage tank (4) bottom further to reduce gas
The elutriation entrainment effect of separated solid-granular material layer.Except BAIYE window grid (15), other similar tools
The horizontal grate inner member for having dihedral vane (16) structure can be used, if in the case that space allows,
Two to three layers can also be arranged, with further idetified separation effect.
Claims (8)
1. a kind of catalytic cracking fourth stage cyclone separator arrangement, the four rotations system include the critical pieces such as three rotation drainage conduits, storage tank, four precession tracheas, four rotations.Storage tank top dilute phase space is provided with a vertical clapboard, storage tank dilute phase space is divided into inertial separation area and settlement separate area, ash-laden gas in three rotation drainage conduits is accessed from the top of inertial separation area, after respectively through inertia and settlement separate area, four rotations are entered again from four precession tracheas being arranged at the top of settlement separate area, through the critical spray nozzle that the gas after four rotation dedustings enters downstream, the isolated solid particle of four rotations then enters the storing pot bottom bed of material along dipleg；Using the difference of gas and solid particle inertia, inertial separation area realizes that gas solid separation, settlement separate area realize gas solid separation using relatively low section gas speed, by above two granule pre-separation measure, in order to reduce by four screw-in mouth granule densities and segregational load；Air locking machine structure is set at four spin material leg particle outlets, in order to avoid gas anti-channeling and the guarantee steady conveying of granule in dipleg in dipleg.
2. a kind of catalytic cracking fourth stage cyclone separator arrangement according to claim 1, it is characterized in that section gas speed scope in inertial separation area is 0.5～1.5m/s, vertical clapboard lower end is not less than 0.5～2.0m apart from storing pot bottom highest material position, and gas speed scope in settlement separate area section is 0.02～0.2m/s.
3. a kind of catalytic cracking fourth stage cyclone separator arrangement according to claim 1-2, it is characterised in that three rotation drainage conduits are arranged on the one end apart from vertical clapboard farther out, and four precession tracheas are arranged on the other end apart from vertical clapboard farther out.
4. a kind of catalytic cracking fourth stage cyclone separator arrangement according to claim 1-3, it is characterised in that four spin material leg particle outlets are provided with air locking machine structure.
5. a kind of catalytic cracking fourth stage cyclone separator arrangement according to claim 1-4, it is characterised in that four spin material leg particle outlets are provided with mechanical air locking machine structure.
6. a kind of catalytic cracking fourth stage cyclone separator arrangement according to claim 1-5, it is characterised in that four spin material leg particle outlets arrange the air locking machine structure of non-mechanical.
7. a kind of catalytic cracking fourth stage cyclone separator arrangement according to claim 1-6, it is characterized in that setting up one or more layers horizontal grate baffle plate with certain inertial separation function above the solid bed of material, preferred structure is the horizontal grate with dihedral vane.
8. a kind of catalytic cracking fourth stage cyclone separator arrangement according to claim 1-7, it is characterised in that the horizontal grate of setting is apart from highest possible 0.05～0.5m of bed of material surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510563142.3A CN106492570A (en) | 2015-09-08 | 2015-09-08 | A kind of catalytic cracking fourth stage cyclone separator arrangement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510563142.3A CN106492570A (en) | 2015-09-08 | 2015-09-08 | A kind of catalytic cracking fourth stage cyclone separator arrangement |
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| CN106492570A true CN106492570A (en) | 2017-03-15 |
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| CN201510563142.3A Pending CN106492570A (en) | 2015-09-08 | 2015-09-08 | A kind of catalytic cracking fourth stage cyclone separator arrangement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631638A (en) * | 2017-09-27 | 2018-01-26 | 北京京诚科林环保科技有限公司 | Three-dimensional inertia gas solid separation flue |
| CN108956020A (en) * | 2018-07-02 | 2018-12-07 | 安徽歌博科技有限公司 | A kind of leak detector valve anti-pollution device |
| CN111085049A (en) * | 2019-12-17 | 2020-05-01 | 上海交通大学 | Dust removal separation device with center bent and biased air outlet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN108956020A (en) * | 2018-07-02 | 2018-12-07 | 安徽歌博科技有限公司 | A kind of leak detector valve anti-pollution device |
| CN111085049A (en) * | 2019-12-17 | 2020-05-01 | 上海交通大学 | Dust removal separation device with center bent and biased air outlet |
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Application publication date: 20170315 |