CN217368807U - Wear-resistant nozzle - Google Patents
Wear-resistant nozzle Download PDFInfo
- Publication number
- CN217368807U CN217368807U CN202221095632.7U CN202221095632U CN217368807U CN 217368807 U CN217368807 U CN 217368807U CN 202221095632 U CN202221095632 U CN 202221095632U CN 217368807 U CN217368807 U CN 217368807U
- Authority
- CN
- China
- Prior art keywords
- inner core
- ceramic inner
- stainless steel
- steel sleeve
- nozzle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Nozzles (AREA)
Abstract
The utility model provides a wear-resisting nozzle, including nonrust steel casing pipe and ceramic inner core, through setting up flange structure at ceramic inner core entry end, exit end to set up high temperature clay between ceramic inner core and nonrust steel casing pipe, effectively solved the technical problem such as the abrasion of nozzle among the prior art, cracked.
Description
Technical Field
The utility model belongs to the technical field of oil refining trade catalytic cracking unit equipment, concretely relates to wear-resisting nozzle.
Background
Whether cracking reaction is carried out in a reactor bed layer of a catalytic cracking unit or coke is burnt in a regenerator bed layer, a distribution plate or a distribution pipe is generally required to be arranged. The main function of the distribution plate or the distribution pipe is to uniformly distribute the gas along the cross section of the bed layer and create a good initial fluidization condition, and simultaneously inhibit the malignant initiation of primary instability of the poly-type fluidization, so that the good initial fluidization condition can be stably maintained for a long time. The medium passing through the distribution plate or the distribution pipe in the reactor is generally oil gas and catalyst, and the medium passing through the distribution plate or the distribution pipe in the regenerator is generally main air, flue gas and catalyst. These media have in common that they contain a high hardness molecular sieve catalyst. In order to ensure long-term operation of the distributor plate or distributor pipe, the nozzles arranged thereon need to be considered wear-resistant. The common alloy steel nozzle generally wears and fails shortly after being started, so that the distribution effect of oil gas or main wind air is poor.
In order to solve the problem of abrasion of the nozzle on the distribution plate or the distribution pipe, a composite nozzle is proposed in chinese patent CN00268320.2, as shown in fig. 1, wherein the inner part is a ceramic inner core, the periphery is a stainless steel casing pipe, both ends are stainless steel end caps, and the nozzle contact medium part uses the ceramic inner core, thereby improving the abrasion resistance of the nozzle and prolonging the service life of the distribution plate or the distribution pipe. But the speed of the medium sprayed out of the nozzle is very high, a negative pressure region is formed at the outlet of the nozzle and generates vortex, the catalyst is absorbed into the negative pressure region to abrade the metal end cover at the outlet end of the nozzle, the metal end cover disappears after being gradually thinned for a short period, and then the catalyst abrades the stainless steel sleeve of the nozzle, and finally the ceramic inner core of the nozzle falls off and deflects without limit; in addition, the temperature of the main air inlet side of a main air distribution plate or a main air inlet side of a distribution pipe in the regenerator is mostly below 150 ℃, the temperature outside the distribution plate or the distribution pipe is between 650 ℃ and 750 ℃, and the temperature difference and the temperature gradient change of the inlet and the outlet are large. Because of the difference of the expansion coefficients of different materials of the stainless steel sleeve and the ceramic inner core of the nozzle, the ceramic inner core of the nozzle is easy to extrude and crack. Erosion and fragmentation of the nozzles affects the uniform distribution of the media within the reactor or regenerator and even the fluidization of the media.
SUMMERY OF THE UTILITY MODEL
The utility model provides a wear-resistant nozzle to solve the technical problems of abrasion, fragmentation and the like of the nozzle in the prior art.
The utility model relates to a wear-resisting nozzle, including nonrust steel casing pipe and ceramic inner core, its characterized in that: the ceramic inner core is cylindrical and hollow, the inner diameter of the inlet end of the ceramic inner core is smaller than that of the outlet end of the ceramic inner core, and transition sections of the inlet end and the outlet end of the ceramic inner core are in transition in a gradually-changed conical shape; the inlet end of the ceramic inner core adopts a flanging structure, and the outer diameter of the flanged inlet end is larger than or equal to the outer diameter of the stainless steel sleeve; the outlet end of the ceramic inner core adopts a flanging structure, and the outer diameter of the flanged ceramic inner core is larger than or equal to the outer diameter of the stainless steel sleeve; high-temperature cement is uniformly coated on the outer wall of the ceramic inner core, the stainless steel sleeve adopts a split structure, and the stainless steel sleeve is sleeved outside the ceramic inner core; and linking the stainless steel sleeves together in a split mode after the sleeving is finished.
The wear-resistant nozzles in the same reaction or regeneration unit are reasonably arranged through the distribution plate or the ring pipe or the dendritic distribution pipe, and the distribution plate or the ring pipe or the dendritic distribution pipe is linked with the stainless steel sleeve of each wear-resistant nozzle.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the transition section between the inlet end and the outlet end of the ceramic inner core is reasonably arranged, so that the pressure drop loss of the nozzle is smaller.
2. The inlet end of the ceramic inner core adopts a flanging structure, so that the problem of abrasion of the metal end plate at the inlet end of the original nozzle is well solved.
3. The outlet end of the ceramic inner core adopts a flanging structure, so that the problem of abrasion of the metal end plate at the outlet end of the original nozzle is well solved.
4. The high-temperature daub is arranged between the ceramic inner core and the stainless steel sleeve, so that the ceramic inner core can be prevented from being cracked due to the difference of expansion coefficients of the stainless steel sleeve and the ceramic inner core material to the greatest extent.
Drawings
FIG. 1 is a schematic view of a composite spray nozzle of the prior art;
FIG. 2 is a schematic structural view of the present invention;
fig. 3 is a sectional view of fig. 2 taken along the direction a.
In the figure: 1 ceramic inner core, 2 stainless steel sleeve, 3 high temperature daub, 4 outlet end metal end plate.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
as shown in fig. 2 and 3, the wear-resistant nozzle comprises a stainless steel sleeve 2 and a ceramic inner core 1, and is characterized in that: the ceramic inner core 1 is cylindrical and hollow, the inner diameter of the inlet end of the ceramic inner core 1 is smaller than that of the outlet end, and the transition section of the inlet end and the outlet end of the ceramic inner core 1 adopts gradual conical transition; the inlet end of the ceramic inner core 1 adopts a flanging structure, and the outer diameter of the flanged ceramic inner core is the same as that of the stainless steel sleeve 2; the outlet end of the ceramic inner core 1 adopts a flanging structure, and the outer diameter of the flanged ceramic inner core is the same as that of the stainless steel sleeve 2; the outer wall of the ceramic inner core 1 is uniformly coated with high-temperature cement 3, the stainless steel sleeve 2 adopts a split structure, and two symmetric stainless steel sleeves are sleeved outside the ceramic inner core 1 in a split manner; after the sleeving is finished, the two sections of stainless steel sleeves are connected together in a split-type manner.
The above are only exemplary embodiments of the present invention, and those skilled in the art can make appropriate modifications and improvements on the basis of the above embodiments, but the embodiments are substantially the same as the present invention and also fall within the protection scope of the present invention.
Claims (1)
1. The utility model provides a wear-resisting nozzle, includes stainless steel sleeve pipe and ceramic inner core, its characterized in that: the ceramic inner core is cylindrical and hollow, the inner diameter of the inlet end of the ceramic inner core is smaller than that of the outlet end of the ceramic inner core, and transition sections of the inlet end and the outlet end of the ceramic inner core are in transition in a gradually-changed conical shape; the inlet end of the ceramic inner core adopts a flanging structure, and the outer diameter of the flanged inlet end is larger than or equal to the outer diameter of the stainless steel sleeve; the outlet end of the ceramic inner core adopts a flanging structure, and the outer diameter of the flanged ceramic inner core is larger than or equal to the outer diameter of the stainless steel sleeve; high-temperature cement is uniformly coated on the outer wall of the ceramic inner core, the stainless steel sleeve adopts a split structure, and the stainless steel sleeve is sleeved outside the ceramic inner core; and linking the stainless steel sleeves together in a split mode after the sleeving is finished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221095632.7U CN217368807U (en) | 2022-05-09 | 2022-05-09 | Wear-resistant nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221095632.7U CN217368807U (en) | 2022-05-09 | 2022-05-09 | Wear-resistant nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217368807U true CN217368807U (en) | 2022-09-06 |
Family
ID=83085687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221095632.7U Active CN217368807U (en) | 2022-05-09 | 2022-05-09 | Wear-resistant nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217368807U (en) |
-
2022
- 2022-05-09 CN CN202221095632.7U patent/CN217368807U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4322384A (en) | Sparger nozzles | |
| CN217368807U (en) | Wear-resistant nozzle | |
| CN101920186B (en) | High treatment capacity feed atomizing nozzle | |
| CN201273563Y (en) | Steam-cooling center barrel | |
| US4198210A (en) | Gas distributor for fluidized bed coal gasifier | |
| CN217368806U (en) | Wear-resistant nozzle | |
| EA033734B1 (en) | Methane conversion apparatus and process using a supersonic flow reactor | |
| CN210367566U (en) | Spray type coal gasifier | |
| CN217928755U (en) | Combustor for regenerator of crude oil catalytic cracking device | |
| CN212293440U (en) | Thermal expansion self-absorption large-hole distribution plate | |
| CN101104814B (en) | Wear-resisting jet pipe | |
| EP0289991A2 (en) | Fluid catalytic cracking unit catalyst transfer and distribution system and process | |
| CN216605671U (en) | Turbulent atomizing nozzle of perforated plate | |
| CN112210403B (en) | Gasifying agent distribution plate and fluidized bed gasification furnace | |
| CN210314336U (en) | Reducing synchronous coupling blast furnace tuyere blowing device | |
| CN214947006U (en) | Novel wear-resistant short pipe | |
| CN210736669U (en) | Cracking gasification reactor | |
| CN214654658U (en) | Main air distribution pipe structure | |
| CN211358765U (en) | Gas distributor | |
| CN207243964U (en) | Bottom blowing binary channels oxygen lance | |
| RU2723020C2 (en) | Column for supply of spent catalyst to regenerator containing its system of waste catalyst regeneration and method of spent catalyst regeneration with its use | |
| CN110038487A (en) | A kind of riser reactor nozzle of easy access dismounting | |
| CN211853991U (en) | Supersonic atomizing nozzle | |
| CN213977553U (en) | Composite cobalt-tungsten-chromium alloy wear-resistant short pipe for flue depressurization hole plate chamber | |
| CN112708447A (en) | Riser reactor capable of reducing back mixing of side wall area |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |