CN203648543U - Gas distributor nozzle - Google Patents
Gas distributor nozzle Download PDFInfo
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- CN203648543U CN203648543U CN201320555956.9U CN201320555956U CN203648543U CN 203648543 U CN203648543 U CN 203648543U CN 201320555956 U CN201320555956 U CN 201320555956U CN 203648543 U CN203648543 U CN 203648543U
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- nozzle
- gas distributor
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Abstract
The utility model belongs to a gas distributor applied to the field of petrochemical industry and discloses a gas distributor nozzle. The gas distributor nozzle comprises a nozzle inlet section and a nozzle outlet section communicated with each other, and is characterized in that an inlet of the nozzle inlet section is conical; a conical vertex angle alpha of the conical inlet is 6-40 degrees. According to the gas distributor nozzle disclosed by the utility model, the conditions that gas flow is unstable, bias current is generated at the nozzle outlet and erosive wear is generated to the nozzle outlet through a catalyst because the gas flow sectional area sharply changes when gas enters the nozzle inlet through a gas distributor branch pipe can be obviously reduced, the service life is long, the operation is stable, and long-period operation of the device is promoted.
Description
Technical field
The utility model belongs to petrochemical industry, relates in particular to a kind of gas distributor for fluidized-bed reactor, regenerator etc.
Background technology
Gas distributor has a wide range of applications in many industrial circles such as petroleum refining, petrochemical industry, Coal Chemical Industry, is particularly useful for gas-solid fluidization reaction unit.Gas distributor is that to be uniformly distributed gas be object important component, whether it evenly will directly affect reaction effect to distribution of gas, for example, in FCC regenerated apparatus, after will evenly mixing with air, the catalyst of surface coking burns, as gas distributor can not be uniformly distributed air, will cause catalyst to burn not exclusively and produce regenerator hot-spot, thereby causing regenerated catalyst carbon containing inhomogeneous and affect the reaction efficiency of follow-up riser reactor.
The gas distributor that at present industry is used is mainly divided into two kinds of tubular gas distributor and board-like gas distributors.Gas distributor will reach and be uniformly distributed gas, need to meet several conditions, the one, air-flow has rational Pressure Drop during by distributor nozzle, and resistance in the time that this Pressure Drop equals air-flow along whole bed uniform distribution, and now distributor plays the effect that is uniformly distributed gas; The 2nd, gas distributes and wants evenly and gas is fast is difficult for too highly at jet expansion, can not produce bias current and eddy current, avoids causing to the outside erosive wear of nozzle self and its.The nozzle that current gas distributor of fludized bed uses mainly adopts the structure of two isometrical straight sections and a reducing changeover portion, is in use prone to distribution of gas inequality and nozzle wear problem.Gas first enters from smaller diameter end, to produce pressure drop, then flows out from larger diameter end, to reduce gas flow rate.When gas enters into nozzle smaller diameter end from the branched pipe of gas distributor, because diminishing suddenly, gas communication sectional area can make air current flow extremely unstable, thereby cause gas bias current at nozzle exit, and then cause catalyst to nozzle inner walls erosion and wearing and tearing, nozzle is reduced service life greatly, also can affect gas distributor to the gas uniform effect that distributes simultaneously.
Accompanying drawing 1 is the gas distributor that adopts at present plain nozzle.Visible by CFX software simulation, in the time that gas enters nozzle inlet section through gas distributor branched pipe, can impact mutually at inducer place air-flow, make gas flow unstable, when air-flow can produce herein bias current in the time that jet expansion section flows out, can produce in jet expansion one side the region that pressure is less, now catalyst can be rolled into nozzle exit, thereby jet expansion is produced to erosive wear, thereby greatly reduce the service life of nozzle.
In the disclosed technical scheme of Chinese patent CN201482591U, nozzle straight length has been changed over to conical diffuser, but its nozzle entrance gas flow is still stable not, can produces gas bias current at jet expansion.Nozzle inner core in the disclosed technical scheme of Chinese patent CN2457162Y and CN2654224Y has adopted wear-resistant ceramic, thereby extend service life, but its geometry has determined jet expansion and will produce gas bias current, easily cause distribution of gas inhomogeneous, affect the gas-solid contact efficiency in fluid bed.
Utility model content
The purpose of this utility model is to provide a kind of gas distributor nozzle, to solve in prior art because the unexpected reducing of gas distributor makes gas flow unstable and in the bias current of jet expansion γ-ray emission, thus erosion nozzle and cause the inhomogeneous situation of gas distributor distribution of gas.
For addressing the above problem, the technical solution adopted in the utility model is:
A kind of gas distributor nozzle, comprises the nozzle entrance section and the jet expansion section that are connected, it is characterized in that: the entrance of described nozzle entrance section is for conical.
A kind of gas distributor nozzle of the utility model, it is further characterized in that: described jet expansion section is straight length.
A kind of gas distributor nozzle of the utility model, it is further characterized in that: the circular cone apex angle α of the conical entrance of described nozzle is 6 °～40 °.
A kind of gas distributor nozzle of the utility model, it is further characterized in that: described nozzle od D=15～100mm.
A kind of gas distributor nozzle of the utility model, it is further characterized in that: the diameter D1=5～50mm of described nozzle entrance section.
A kind of gas distributor nozzle of the utility model, it is further characterized in that: the diameter D2=7～70mm of described jet expansion section.
A kind of gas distributor nozzle of the utility model, it is further characterized in that: the conical approach cone section maximum diameter of described nozzle D3≤(D+D2)/2.
A kind of gas distributor nozzle of the utility model, it is further characterized in that: described nozzle entrance straight length height L1 is 3～10 with the ratio of the diameter D1 of nozzle entrance section.
A kind of gas distributor nozzle of the utility model, it is further characterized in that: described jet expansion straight length height L2 is 2～5 with the ratio of the diameter D2 of jet expansion section.
A kind of gas distributor nozzle of the utility model, it is further characterized in that: between described nozzle entrance straight length and jet expansion straight length, connect with a changeover portion.
The utility model is by changing gas distributor nozzle entrance section place structure, change nozzle entrance into pyramid type, can greatly reduce like this because gas communication sectional area sharply changes the gas flow causing situation unstable and that make catalyst produce erosive wear to jet expansion in nozzle exit generation bias current and occur.Gas flows and does not significantly mutually impact at nozzle entrance section place, and gas flow is stable, and in the time that air-flow flows out from jet expansion section, bias current situation herein is obviously improved.
Employing the beneficial effects of the utility model are: the utility model gas distributor nozzle can obviously reduce while entering into nozzle entrance place due to gas through gas distributor branched pipe, it is unstable that gas communication sectional area sharply changes the gas flow causing, produce bias current at nozzle exit, make catalyst produce the situation of erosive wear to jet expansion.The utility model gas distributor nozzle is not easy to wear, long service life, and stable operation, is conducive to device long-term operation.
Accompanying drawing explanation
Fig. 1 is prior art gas distributor nozzle figure;
Fig. 2 is the utility model gas distributor nozzle figure;
Fig. 3 is the utility model gas distributor nozzle arrangements figure;
Fig. 4 is that the utility model nozzle is for tubular type dendritic gas distributor structural representation;
Fig. 5 is that the utility model nozzle is for tubular type ring-pipe type gas distributor structural representation.
Reference numeral shown in figure is: 21-prior art nozzle entrance section, 22-prior art jet expansion section, 31-nozzle entrance, 32-jet expansion, 4-dendritic gas distributor branched pipe, 42-nozzle, 43-regenerator housing, 44-dendritic gas distributor arm, 45-dendritic gas distributor air main, 51-annular gas distributor endless tube, 52-nozzle, 53-stripping section housing, 54-annular gas distributor entrance.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, the drawings and specific embodiments do not limit the claimed scope of the utility model.
The utility model nozzle arrangements is shown in accompanying drawing 3, and its physical dimension is described below; D is nozzle od, D1 nozzle entrance section diameter, and D2 is nozzle straight length diameter, and D3 is nozzle entrance cone section maximum diameter, and L1 is nozzle entrance straight length height, and L2 is jet expansion straight length height, α is nozzle circular cone drift angle.Each size is described below: D2≤D3≤(D+D2)/2, α=6 °～40 °, L1/D1=3～10, L2/D2=2～5.
The utility model nozzle can be applied in the middle of dendritic gas distributor and ring-pipe type gas distributor, and its distribution form and quantity are determined by conditions such as concrete technology condition and apparatus-form.Nozzle 42 is connected with the wall of dendriform gas distributor branched pipe 41 and annular gas distributor endless tube 51 respectively with 52.Accompanying drawing 4 is applied in the middle of fluidized catalytic cracker regenerator main air distributor for the utility model, and this gas distributor is dendritic.Enter in dendritic gas distributor air main 45 from the compressed air of main air blower, then, via dendritic gas distributor arm 44, dendritic gas distributor branched pipe 41, finally by nozzle 42, air is distributed in regenerator equably.Fig. 5 is that the utility model gas distributor nozzle application is in fluidized catalytic cracker settler stripping section annular tube type gas distributor, stripped vapor enters ring-like gas distributor endless tube 51 by ring-like gas distributor entrance 54, by nozzle 52, stripped vapor is distributed in stripping section bed equably.The utility model is specially adapted to the reclaimable catalyst regenerative process in stripping and the regenerator of reclaimable catalyst of fluidized catalytic cracker, also can be used in other multiphase flow reaction unit.
Embodiment: the application of the utility model gas distributor nozzle on certain 800,000 tons/year of FCC apparatus.
The utility model is applied in certain 800,000 tons/year of FCC apparatus regenerator Revamping of Main Air Distributor, and distributor form is referring to Fig. 4, and distributor Nozzle Parameter is in table 1.
Table 1FCC regenerating unit gas distributor Nozzle Parameter
Claims (1)
1. the gas distributor nozzle for fluidized-bed reactor and regenerator, comprise the nozzle entrance section and the jet expansion section that are connected, it is characterized in that: the entrance of described nozzle entrance section is for conical, the circular cone apex angle α of the conical entrance of described nozzle is 6 °～40 °, described jet expansion section is straight length, described nozzle od D=15～100mm, diameter D1=5～the 50mm of described nozzle entrance section, diameter D2=7～the 70mm of described jet expansion section, the conical approach cone section maximum diameter of described nozzle D3≤(D+D2)/2, described nozzle entrance straight length height L1 is 3～10 with the ratio of the diameter D1 of nozzle entrance section, described jet expansion straight length height L2 is 2～5 with the ratio of the diameter D2 of jet expansion section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320555956.9U CN203648543U (en) | 2013-09-02 | 2013-09-02 | Gas distributor nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320555956.9U CN203648543U (en) | 2013-09-02 | 2013-09-02 | Gas distributor nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203648543U true CN203648543U (en) | 2014-06-18 |
Family
ID=50914986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320555956.9U Expired - Lifetime CN203648543U (en) | 2013-09-02 | 2013-09-02 | Gas distributor nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203648543U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114432973A (en) * | 2022-03-01 | 2022-05-06 | 中国神华煤制油化工有限公司 | Tubular gas distributor and gas-solid fluidized reactor |
-
2013
- 2013-09-02 CN CN201320555956.9U patent/CN203648543U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114432973A (en) * | 2022-03-01 | 2022-05-06 | 中国神华煤制油化工有限公司 | Tubular gas distributor and gas-solid fluidized reactor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140618 |