CN105195348B - A kind of abrasion of regenerated flue gas double-venturi structure nozzle slows down technique - Google Patents
A kind of abrasion of regenerated flue gas double-venturi structure nozzle slows down technique Download PDFInfo
- Publication number
- CN105195348B CN105195348B CN201510601020.9A CN201510601020A CN105195348B CN 105195348 B CN105195348 B CN 105195348B CN 201510601020 A CN201510601020 A CN 201510601020A CN 105195348 B CN105195348 B CN 105195348B
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- CN
- China
- Prior art keywords
- venturi
- tube structure
- flue gas
- venturi tube
- orifice plate
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000003546 flue gas Substances 0.000 title claims abstract description 40
- 238000005299 abrasion Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 8
- 239000003054 catalyst Substances 0.000 claims abstract description 27
- 230000008602 contraction Effects 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 238000006555 catalytic reaction Methods 0.000 claims 1
- 238000004523 catalytic cracking Methods 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 210000000867 larynx Anatomy 0.000 description 3
- 229910000531 Co alloy Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
A kind of abrasion of regenerated flue gas double-venturi structure nozzle slows down technique, is the composition of regenerated flue gas double-venturi structure nozzle；Flue gas and catalyst enter the first Venturi tube structure contraction section and enter the first Venturi tube structure venturi, are become smaller by bore and compress flue gas and catalyst, generate pressure drop；Flue gas and catalyst enter the first Venturi tube structure diffuser, reduction of speed after accelerating, the pressure drop that venturi generates reduces the second Venturi tube structure diffuser and orifice plate venturi pressure drop；Flue gas in orifice plate venturi and catalyst, become heavy caliber by the second Venturi tube structure diffuser to spread rapidly, the generation for reducing wherein vortex intensity flows back caused by also counteracting vortex, reduces the vortex abrasion to orifice plate ontology and orifice plate venturi exit and directly washes away；Using venturi double structure, the vortex of first structure increased pressure drop before orifice plate, the second structure interference issue directly washes away orifice plate ontology and nozzle throat diameter, extends service life.
Description
Technical field
The present invention relates to the nozzle of regenerated flue gas critical flow velocity, especially a kind of regenerated flue gas double-venturi structure nozzle
Abrasion slows down technique.
Background technology
Currently, critical velocity nozzle be catalytic cracking unit control three times cyclone separator pressure balance and flue gas it is quantitative into
Enter the critical component of smoke machine.For its operating temperature up to 700 DEG C, flue gas flow rate reaches 200m/s, and by containing a small amount of catalyst pellets
The air-flow erosion of son.Its operating mode quality directly affects the generating capacity of the efficiency and smoke machine of three-stage cyclone separator recycling catalyst
And smoke machine stable operation；It uses cobalt-base alloys Venturi tube structure critical velocity nozzle the nineties, becomes China's critical flow velocity
The main application form of nozzle.After 2000, China's catalytic cracking unit improves the cycle of operation by 3 years, because in catalytic cracking
The position that device wears most serious is abrasion of the vortex of the gentle formation of catalyst to orifice plate ontology and nozzle throat diameter exit.Cobalt
Based alloy Venturi tube structure critical velocity nozzle cannot meet 3 years service life, and the critical velocity nozzle of orifice-plate type structure is again
As mainstream, in recent years the partially catalyzed cracking unit cycle of operation be increased to 4 years or 4 years or more, critical velocity nozzle is used
Period proposes new growth requirement；In view of the foregoing, the catalytic cracking unit in existing China improves the cycle of operation to 3 years, cobalt
Based alloy Venturi tube structure critical velocity nozzle cannot meet 3 years service life, now invent a kind of double literary mounds of regenerated flue gas
In the abrasion of structure nozzle slow down technique.
Invention content
The purpose of the invention is to overcome the catalytic cracking unit in existing China to improve the cycle of operation to 4 years or 4 years
More than, orifice-plate type structure critical velocity nozzle, cannot meet 4 years or 4 years periods used above were carried by reasonably designing
Slow down technique for a kind of abrasion of regenerated flue gas double-venturi structure nozzle, using venturi double structure, first structure is in orifice plate
Increase the pressure drop of certain critical velocity nozzle, reducing smoke and catalyst before to critical velocity nozzle orifice plate ontology and orifice plate larynx
Diameter directly washes away, the vortex of flue gas and catalyst at the second structure interference issue, slows down orifice plate ontology and the outlet of orifice plate larynx diameter
The abrasion at place, extends service life.
The present invention to achieve the goals above, adopts the following technical scheme that：A kind of regenerated flue gas double-venturi structure nozzle
Abrasion slow down technique, the regenerated flue gas double-venturi structure nozzle, be by：First Venturi tube structure contraction section first
Venturi tube structure venturi the first Venturi tube structure diffuser critical velocity nozzle orifice plate orifice plate venturi the second Venturi tube structures of
Diffuser is constituted；The first Venturi tube structure contraction section is arranged in import in spray nozzle device, the first Venturi tube structure larynx is arranged in middle part
The first Venturi tube structure diffuser, the first Venturi tube structure diffuser end set critical velocity nozzle is arranged in road, jet expansion
Orifice plate, critical velocity nozzle orifice plate middle part are arranged orifice plate venturi, the second Venturi tube structure diffuser are arranged on the outside of orifice plate venturi；
When work, flue gas and catalyst enter the first Venturi tube structure contraction section, pass through the first Venturi tube structure contraction section
Into the first Venturi tube structure venturi, the first Venturi tube structure venturi is become smaller by bore compresses flue gas and catalyst, generates pressure
Drop；Flue gas and catalyst enter the first Venturi tube structure diffuser after accelerating, and spread reduction of speed, and the first Venturi tube structure venturi generates
Pressure drop；By the first Venturi tube structure venturi pressure drop, the pressure drop to the second Venturi tube structure diffuser and orifice plate venturi is reduced.
Flue gas in orifice plate venturi and catalyst become heavy caliber by the second Venturi tube structure diffuser, make flue gas and urge
Agent is spread rapidly, reduces the vortex intensity that flue gas and catalyst generate, and the second Venturi tube structure diffuser hinders vortex and makes
At reflux, all reduce the vortex abrasion in orifice plate ontology and orifice plate venturi exit jointly and directly wash away.
Advantageous effect：Using venturi double structure, first structure increases the pressure of certain critical velocity nozzle before orifice plate
Drop, reduces the pressure drop of critical velocity nozzle orifice plate venturi, reducing smoke and catalyst to orifice plate ontology and to nozzle throat diameter
It directly washes away, the vortex of flue gas and catalyst at the second structure interference issue, slows down orifice plate ontology and nozzle throat diameter exit
Abrasion, extends service life.
Using corundum ceramics, nozzle throat diameter position is using corundum ceramics.
Flue gas enters critical velocity nozzle entrance, is the inlet side of the first Venturi tube structure contraction section, and flue gas passes through contraction section
Continuous speedup reaches Venturi tube structure venturi speedup to maximum value, and the pressure drop of generation is maximum, and critical velocity nozzle pressure drop is this moment
First Venturi tube structure venturi pressure drop adds orifice plate venturi pressure drop：The pressure drop of the critical velocity nozzle of current AND DEWATERING FOR ORIFICE STRUCTURE is equal to orifice plate
Venturi pressure drop；Orifice plate venturi and the second Venturi tube structure diffuser form the second Venturi tube structure.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is general assembly structural schematic diagram；
In Fig. 1：First Venturi tube structure contraction section 1, the first Venturi tube structure venturi 2, the first Venturi tube structure diffuser
3, critical velocity nozzle orifice plate 4,5. second Venturi tube structure diffuser 6 of orifice plate venturi.
Specific implementation mode
With reference to embodiment, invention is further described in detail with specific implementation mode：
Embodiment 1
The first Venturi tube structure contraction section 1 is arranged in import in spray nozzle device, the first Venturi tube structure venturi is arranged in middle part
2, the first Venturi tube structure diffuser 3,3 end set critical velocity nozzle of the first Venturi tube structure diffuser is arranged in jet expansion
Orifice plate 4,4 middle part setting orifice plate venturi 5 of critical velocity nozzle orifice plate, 5 outside the second Venturi tube structure of setting of orifice plate venturi are spread
Section 6；
When work, flue gas and catalyst enter the first Venturi tube structure contraction section 1, pass through the first Venturi tube structure contraction section
1 enters the first Venturi tube structure venturi 2, and the first Venturi tube structure venturi 2 is become smaller by bore compresses flue gas and catalyst, generates
Pressure drop；Flue gas and catalyst enter the first Venturi tube structure diffuser 3 after accelerating, and spread reduction of speed, the first Venturi tube structure venturi 2
Generate pressure drop；By 2 pressure drop of the first Venturi tube structure venturi, reduce to the second Venturi tube structure diffuser 6 and orifice plate venturi 5
Pressure drop；
Flue gas in orifice plate venturi 5 and catalyst, by the second Venturi tube structure diffuser 6 become heavy caliber, make flue gas and
Catalyst is spread rapidly, reduces the vortex intensity that flue gas and catalyst generate, and the second Venturi tube structure diffuser 6 hinders vortex
Caused by flow back, all reduce jointly 5 exit of orifice plate ontology and orifice plate venturi vortex abrasion and directly wash away.
Claims (1)
1. a kind of abrasion of regenerated flue gas double-venturi structure nozzle slows down technique, regenerated flue gas double-venturi structure spray
Mouth, be by：First Venturi tube structure contraction section (1), the first Venturi tube structure venturi (2), the first Venturi tube structure diffuser
(3), critical velocity nozzle orifice plate (4), orifice plate venturi (5), the second Venturi tube structure diffuser (6) are constituted；It is characterized in that：Spray
The first Venturi tube structure contraction section (1) is arranged in import in mouth device, the first Venturi tube structure venturi (2), nozzle is arranged in middle part
The first Venturi tube structure diffuser (3) of outlet setting, first Venturi tube structure diffuser (3) end set critical velocity nozzle hole
The second venturi knot is arranged in plate (4), critical velocity nozzle orifice plate (4) middle part setting orifice plate venturi (5), orifice plate venturi (5) outside
Structure diffuser (6)；
When work, flue gas and catalyst enter the first Venturi tube structure contraction section (1), pass through the first Venturi tube structure contraction section
(1) enter the first Venturi tube structure venturi (2), the first Venturi tube structure venturi (2) is become smaller by bore compresses flue gas and catalysis
Agent generates pressure drop；Flue gas and catalyst enter the first Venturi tube structure diffuser (3) after accelerating, and spread reduction of speed, the first venturi
Structure venturi (2) generates pressure drop；By first Venturi tube structure venturi (2) pressure drop, reduce to the second Venturi tube structure diffuser
(6) and the pressure drop of orifice plate venturi (5)；
Flue gas and catalyst in orifice plate venturi (5), by the second Venturi tube structure diffuser (6) become heavy caliber, make flue gas and
Catalyst is spread rapidly, reduces the vortex intensity that flue gas and catalyst generate, and the second Venturi tube structure diffuser (6) hinders whirlpool
Reflux caused by stream all reduces the vortex abrasion of orifice plate ontology and orifice plate venturi (5) exit and directly washes away jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510601020.9A CN105195348B (en) | 2015-09-11 | 2015-09-11 | A kind of abrasion of regenerated flue gas double-venturi structure nozzle slows down technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510601020.9A CN105195348B (en) | 2015-09-11 | 2015-09-11 | A kind of abrasion of regenerated flue gas double-venturi structure nozzle slows down technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105195348A CN105195348A (en) | 2015-12-30 |
| CN105195348B true CN105195348B (en) | 2018-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510601020.9A Active CN105195348B (en) | 2015-09-11 | 2015-09-11 | A kind of abrasion of regenerated flue gas double-venturi structure nozzle slows down technique |
Country Status (1)
| Country | Link |
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| CN (1) | CN105195348B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109065194B (en) * | 2018-07-20 | 2024-09-03 | 中广核研究院有限公司 | A core inlet flow distribution device |
| CN119532750B (en) * | 2024-12-18 | 2025-07-15 | 北京中科润宇环保科技股份有限公司 | Denitration device and denitration method for flue gas from garbage incinerator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2407006Y (en) * | 1999-08-31 | 2000-11-22 | 刘德烈 | Heavy Oil Catalytic Cracking Adjustable Feed Atomization Nozzle |
| CN201776201U (en) * | 2010-08-21 | 2011-03-30 | 中国石油化工股份有限公司 | A catalytic cracking feed nozzle |
| CN201880620U (en) * | 2010-11-12 | 2011-06-29 | 洛阳卓达石化工程技术有限公司 | Highly-wear-resistant anti-blocking critical velocity nozzle |
| CN102827628A (en) * | 2012-09-13 | 2012-12-19 | 洛阳森德石化工程有限公司 | Heavy oil catalytic cracking feeding atomizing nozzle |
| CN203754651U (en) * | 2014-03-10 | 2014-08-06 | 沈庆成 | Feeding nozzle of lifting pipe of high-efficiency catalytic cracking device |
| CN205095987U (en) * | 2015-09-11 | 2016-03-23 | 洛阳森德石化工程有限公司 | Two venturi structure spray nozzle device of regeneration flue gas |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2839269B1 (en) * | 2002-05-06 | 2004-07-09 | Inst Francais Du Petrole | IMPROVED DEVICE FOR INJECTING HYDROCARBONS INTO A FLUIDIZED ENCLOSURE |
-
2015
- 2015-09-11 CN CN201510601020.9A patent/CN105195348B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2407006Y (en) * | 1999-08-31 | 2000-11-22 | 刘德烈 | Heavy Oil Catalytic Cracking Adjustable Feed Atomization Nozzle |
| CN201776201U (en) * | 2010-08-21 | 2011-03-30 | 中国石油化工股份有限公司 | A catalytic cracking feed nozzle |
| CN201880620U (en) * | 2010-11-12 | 2011-06-29 | 洛阳卓达石化工程技术有限公司 | Highly-wear-resistant anti-blocking critical velocity nozzle |
| CN102827628A (en) * | 2012-09-13 | 2012-12-19 | 洛阳森德石化工程有限公司 | Heavy oil catalytic cracking feeding atomizing nozzle |
| CN203754651U (en) * | 2014-03-10 | 2014-08-06 | 沈庆成 | Feeding nozzle of lifting pipe of high-efficiency catalytic cracking device |
| CN205095987U (en) * | 2015-09-11 | 2016-03-23 | 洛阳森德石化工程有限公司 | Two venturi structure spray nozzle device of regeneration flue gas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105195348A (en) | 2015-12-30 |
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