CN206276200U - A kind of catalytic cracking flue gas dust arrester - Google Patents
A kind of catalytic cracking flue gas dust arrester Download PDFInfo
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- CN206276200U CN206276200U CN201621225416.4U CN201621225416U CN206276200U CN 206276200 U CN206276200 U CN 206276200U CN 201621225416 U CN201621225416 U CN 201621225416U CN 206276200 U CN206276200 U CN 206276200U
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Abstract
The utility model discloses a kind of catalytic cracking flue gas dust arrester, catalytic cracking flue gas after saturation sequentially pass through the technical process such as absorption spraying layer, one-level cyclone system, washing spraying layer, two grades of cyclone systems and high efficiency composition dedusting demister, finally up to standard to enter air.The effect of removing exhaust gas dust, droplet greatly improved using one-level cyclone system and two grades of cyclone system group technologies for the utility model, so as to improve efficiency of dust collection, it is ensured that device environmental protection, stabilization and efficient operation.
Description
Technical field
The utility model belongs to a kind of fume dust remover, specially a kind of catalytic cracking flue gas dust arrester, can also answer
For technical fields such as petrochemical industry, chemical industry, machinery, steel, building materials.
Background technology
Catalytic cracking unit is main gasoline production device, is also important heavy oil lightweight makeup in Petrochemical Enterprises
Put.Contain substantial amounts of SO in catalytic cracking flue gas2And catalyst dust, wherein catalytic cracking flue gas flue gas after three-stage cyclone
Middle catalyst powder dust concentration 150-300mg/m3, and catalyst dust particle is tiny, 0-5 μm of catalyst dust accounts for more than 80%,
Therefore catalytic cracking flue gas dust is the difficult point of catalytic cracking unit smoke gas treatment.
Utility model content
The purpose of this utility model is directed to above-mentioned technical problem there is provided in a kind of removing catalytic cracking flue gas
The less dust of particle diameter and droplet, it is ensured that the dustiness≤30mg/Nm in neat stress3, reach standard limit of smog release.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of catalytic cracking flue gas dust arrester, the device from top to bottom successively include desulfurizing tower tower reactor, absorb spraying layer,
One-level cyclone system, two grades of cyclone systems and high efficiency composition dedusting demister, described one-level cyclone system and two grades of eddy flow systems
Washing spraying layer is provided between system, the backwash of one-level cyclone system is provided between described one-level cyclone system and absorption spraying layer
Layer, is provided with two grades of cyclone system backwash layers between described washing spraying layer and two grades of cyclone systems.
In some technical schemes：Cowling panel is provided with above described one-level cyclone system.As preferred：On cowling panel
It is provided with the circular hole of 28mm-80mm, percent opening 30-45%.
In some technical schemes：Cyclone is provided with one-level cyclone system and two grades of cyclone systems, 1 is provided with cyclone
~3 layers of spiral board, eddy flow wall is provided with hole, and gas-liquid dividing plate is additionally provided with the top of the pipeline of cyclone.As preferred：One-level is revolved
1~3 layer of spiral board is provided with streaming system, 2~3 layers of spiral board are provided with two grades of cyclone systems, described spiral board is export-oriented plate.
In some technical schemes：High efficiency composition dedusting demister is by folded plate demister and loose fiber bed dedusting demister
Composition.
In some technical schemes：Two grades of cyclone system perforation kinetic energy factors are more than one-level cyclone system；And two grades of eddy flows
, 15~25, the perforation kinetic energy factor control of one-level cyclone system is 10~20 for the control of system punch kinetic energy factor.
In some preferred technical schemes：The absorbing liquid of spraying layer is absorbed for the magnesium sulfite that solid content is 3~8% is molten
Liquid, the flow for absorbing spraying layer is 360m3/ h, sprays coverage rate 100~200%.
In some preferred technical schemes：The flow for washing spraying layer is 80~100m3/ h, spray coverage rate 100~
200%.
In technical solutions of the utility model：Described catalytic cracking flue gas dust arrester utilizes water washing cycles pump by water washing tank
Interior water lotion delivers to washing spraying layer and sprays into purifying smoke in tower, and water lotion by flowing to washing certainly after one-level eddy flow catch tray
Tank；The flushing water or water lotion collected in two grades of eddy flow catch trays also flow to water washing tank certainly.Water lotion in water washing tank passes through boundary
Outer process water supplement, simultaneously also by water washing cycles pump to desulphurization system moisturizing, this both ensure that systematic water balance, also ensure that
The renewal of water lotion.
In described dust collection method and its device, one-level cyclone system and two grades of cyclone system bottoms are provided with backwash layer
Periodic flushing cyclone system, so as to ensure cyclone dedusting demisting efficiency.
In described dust collection method and its device, one-level cyclone system top is provided with cowling panel to flue gas rectification, rectification
Plate is a circular steel plate, the uniform 28mm-80mm circular holes of steel plate, percent opening 30-45%.Flue gas by after cowling panel uniformly through de-
Sulphur tower section ensure that two grades of cyclone system dedusting demisting efficiencies.
Preferably, in described dust collecting process and its device, high efficiency composition dedusting demister be demister with it is loose
Fibre bed dedusting demister combining structure, and it is arranged on desulfurizing tower top.When one-level cyclone system and two grades of cyclone system failures
Or when degrading, high efficiency composition dedusting demister not only possesses the effect of dedusting demisting, and ensure that dedusting demisting efficiency.
Preferably, in described dust collecting process and its device, the pipeline that cyclone is set isPipeline, every layer
The uniform desulfurization tower section of 3-4 roots；Cyclone set perforate bePerforate 3-4 uniform wall；Liquid outlet is washing
Liquid is designed as and horizontal plane certain angle, the effect with increase air resistance with water out, liquid outlet is rinsed；Gas-liquid dividing plate
Design is in cyclone apex and be conical structure, and gas-liquid dividing plate isolation water lotion or flushing water prevent leakage.
Preferably, in described dust collecting process and its device, one-level cyclone system is designed as with two grades of cyclone systems
Grade cyclone system perforation kinetic energy factor of step dust pelletizing system, i.e., two is more than one-level cyclone system, so that efficiency of dust collection is higher.Two grades
~20, the perforation kinetic energy factor control of one-level cyclone system is~15 for cyclone system perforation kinetic energy factor control.
The beneficial effects of the utility model：
1) this process unit using absorb spraying layer, one-level cyclone system, washing spraying layer, two grades of cyclone systems and efficiently
The technical process purifying smoke such as composite dedusting demister, particularly two-stage rotational flow dust-removing demister system group technology efficient removal
Fine dusts and droplet in flue gas, final neat stress dust content≤30mg/Nm3。
2) this process unit flow is simple, and occupation of land is small, and efficiency of dust collection is high, easy to operate, and investment and operating cost are relatively low.
Brief description of the drawings
Fig. 1 is catalytic cracking flue gas dust collecting process of the present utility model and its device schematic flow sheet：
In figure, 1-saturated flue gas, 2-absorb spraying layer, 3-one-level cyclone system backwash layer, 4-one-level eddy flow collection
Liquid disk, 5-one-level cyclone system, 6-washing spraying layer, 7-two grades of cyclone systems backwash layers, 8-two grades of eddy flow catch trays,
9-two grades of cyclone systems, 10-high efficiency composition dedusting demister, 11-neat stress, 12-water washing cycles pump, 13-water washing tank,
14-cowling panel, 15-desulfurizing tower tower reactor.
Fig. 2 is rotational flow dust-removing demister structural representation of the present utility model：
In figure, 16-spiral board, 17-support meanss, 18-pipeline, 19-hole, 20-gas-liquid dividing plate, 21-liquid discharge
Mouthful.
Fig. 3 is rotational flow dust-removing demister distribution schematic diagram of the present utility model.
Specific embodiment
The utility model is described further with reference to embodiment, but protection domain of the present utility model is not limited to
This：
Such as Fig. 1~3, a kind of catalytic cracking flue gas dust arrester, the device is from top to bottom successively including desulfurizing tower tower reactor
(15) spraying layer (2), one-level cyclone system (5), two grades of cyclone systems (9) and high efficiency composition dedusting demister (10), institute, are absorbed
Washing spraying layer (6), described one-level cyclone system are provided between the one-level cyclone system (5) stated and two grades of cyclone systems (9)
(5) one-level cyclone system is provided with and absorption spraying layer (2) between and backwashes layer (3), described washing spraying layer (6) and two grades of rotations
Two grades of cyclone systems are provided between streaming system (9) and backwash layer (7).Cowling panel (14) is provided with above one-level cyclone system (5),
Cowling panel is provided with the circular hole of 28mm-80mm, percent opening 30-45%.
Cyclone is provided with one-level cyclone system (5) and two grades of cyclone systems (9), in one-level cyclone system (5) cyclone
1 layer of spiral board (16) is provided with, 2 layers of spiral board (16) are provided with two grades of cyclones of cyclone system (9), described spiral board is outer
To plate；Eddy flow wall is provided with 3~4 holes (19), and liquid outlet (21) is provided with below cyclone, and the outlet is water lotion
With flushing water out, liquid outlet is designed as and horizontal plane certain angle, with the effect for increasing air resistance；Filled by supporting
Put (17) gas-liquid dividing plate (20) is fixed on into cyclone apex and to be conical structure, gas-liquid dividing plate (20) isolation water lotion or punching
Wash water prevents leakage.
Described high efficiency composition dedusting demister (10) is made up of folded plate demister and loose fiber bed dedusting demister.
The device also includes water washing cycles pump (12), liquid pump will be washed in water washing tank (13) by by water washing cycles pump (12)
Deliver to washing spraying layer (6) and spray into purifying smoke in tower, water lotion is by the one-level eddy flow positioned at one-level cyclone system (5) bottom
Catch tray (4) flow to water washing tank (13) certainly afterwards；Collected in two grades of eddy flow catch trays (8) in two grades of cyclone systems (9)
Flushing water or water lotion also flow to water washing tank (13) certainly.Water lotion in water washing tank (13) is supplemented by out-of-bounds process water, while
Also by water washing cycles pump (12) to desulphurization system moisturizing, this both ensure that systematic water balance, also ensure that the renewal of water lotion.
Described two grades of cyclone systems (9) perforation kinetic energy factor is more than one-level cyclone system；And two grades of cyclone systems (5)
(9), 20, one-level cyclone system (5) perforation kinetic energy factor control is 15 for the control of perforation kinetic energy factor.
Saturation catalytic cracking flue gas amount is 40350Nm3/ h, 185 DEG C of temperature, desulfurizing tower entrance saturation after boiler afterheat recovery
65 DEG C of flue-gas temperature, inlet flue gas dust content 100mg/Nm3.Flue gas (1) is introduced into desulfurizing tower and absorbs spraying layer (2), absorbs spray
The flow of drenching layer is 360m3/ h, every layer of spray coverage rate 150%, absorbing liquid is the magnesium sulfite solution of solid content 5%.Removing SO2
With, into one-level cyclone system (5), dust in one-level cyclone system (5) removing flue gas leads to after flue gas ash removal after catalyst dust
Washing spraying layer (6) washing flue gas is crossed, the flow of washing spraying layer (6) is 100m3/ h, every layer of spray coverage rate 150%.Enter again
Enter two grades of cyclone systems (9), two grades of cyclone systems (9) remove dust and droplet, and flue gas is most afterwards through high efficiency composition dedusting demister
(10) neat stress (11) after up to standard enters air, and neat stress draws data by detection：Neat stress exports total dust content and is less than
30mg/Nm3。
Claims (6)
1. a kind of catalytic cracking flue gas dust arrester, it is characterised in that：The device includes desulfurizing tower tower reactor successively from top to bottom
(15) spraying layer (2), one-level cyclone system (5), two grades of cyclone systems (9) and high efficiency composition dedusting demister (10), institute, are absorbed
Washing spraying layer (6), described one-level cyclone system are provided between the one-level cyclone system (5) stated and two grades of cyclone systems (9)
(5) one-level cyclone system is provided with and absorption spraying layer (2) between and backwashes layer (3), described washing spraying layer (6) and two grades of rotations
Two grades of cyclone systems are provided between streaming system (9) and backwash layer (7).
2. catalytic cracking flue gas dust arrester according to claim 1, it is characterised in that：One-level cyclone system (5) it is upper
Side is provided with cowling panel (14).
3. catalytic cracking flue gas dust arrester according to claim 2, it is characterised in that：Cowling panel is provided with 28mm-
The circular hole of 80mm, percent opening 30-45%.
4. catalytic cracking flue gas dust arrester according to claim 1, it is characterised in that：One-level cyclone system (5) and two
Cyclone is provided with level cyclone system (9), 1~3 layer of spiral board (16) is provided with cyclone, eddy flow wall is provided with hole (19),
Gas-liquid dividing plate (20) is additionally provided with pipeline (18) top of cyclone.
5. catalytic cracking flue gas dust arrester according to claim 1, it is characterised in that：One-level cyclone system sets in (5)
There is 1~3 layer of spiral board (16), 2~3 layers of spiral board (16) are provided with two grades of cyclone systems (9), described spiral board is extroversion
Plate.
6. catalytic cracking flue gas dust arrester according to claim 1, it is characterised in that：High efficiency composition dedusting demister
(10) it is made up of folded plate demister and loose fiber bed dedusting demister.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621225416.4U CN206276200U (en) | 2016-11-15 | 2016-11-15 | A kind of catalytic cracking flue gas dust arrester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621225416.4U CN206276200U (en) | 2016-11-15 | 2016-11-15 | A kind of catalytic cracking flue gas dust arrester |
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| CN206276200U true CN206276200U (en) | 2017-06-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106512662A (en) * | 2016-11-15 | 2017-03-22 | 中石化南京工程有限公司 | Dust removing method and device for catalytic-cracking fume |
| CN112275093A (en) * | 2019-07-23 | 2021-01-29 | 牛双印 | Novel water washing tower |
-
2016
- 2016-11-15 CN CN201621225416.4U patent/CN206276200U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106512662A (en) * | 2016-11-15 | 2017-03-22 | 中石化南京工程有限公司 | Dust removing method and device for catalytic-cracking fume |
| CN112275093A (en) * | 2019-07-23 | 2021-01-29 | 牛双印 | Novel water washing tower |
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