Ceramic nozzle

Abstract

The invention belongs to the technical field of petroleum catalytic cracking, and particularly relates to a ceramic nozzle. Comprising a ceramic inner pipe and a metal sleeve arranged outside the ceramic inner pipe in a sleeving mode, the diameter of an upper end inner hole of the ceramic inner pipe is larger than that of a lower end inner hole of the ceramic inner pipe, and the upper end inner hole and the lower end inner hole are communicated through a circular truncated cone hole; a lower clamping table is fixedly connected to the position, located at the bottom end of the ceramic inner pipe, in the metal sleeve, the upper clamping table and the lower clamping table are used for limiting and fixing the ceramic inner pipe, a limiting insertion hole is formed in the side wall of the metal sleeve, and a limiting insertion groove is formed in the position, corresponding to the limiting insertion hole, of the outer wall of the ceramic inner pipe. Metal insertion pieces are installed in the limiting insertion holes and the limiting insertion grooves. The ceramic inner pipe is fixed in the metal sleeve, and the ceramic inner pipe has better wear resistance, so that the service life is longer, frequent replacement is not needed, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of petroleum catalytic cracking, and particularly relates to a ceramic nozzle. Background Art

[0002] Petroleum cracking is an important link in the process of processing crude oil into various refined oils. Specifically, it is to crack the crude oil with large molecular chains into various refined oils with small molecular chains. The petroleum cracking process is mainly completed through heating and catalytic processes. Therefore, various catalysts become important substances in the petroleum cracking process. However, to spray the catalyst into the cracking device through a nozzle, most of the currently used nozzles are metal nozzles, which have poor wear resistance, are easily worn, have a short service life, and need to be frequently replaced, bringing an additional workload to the staff and increasing unnecessary maintenance costs. Therefore, there is an urgent need to design a ceramic nozzle with better wear resistance and longer service life. Summary of the Invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention discloses a ceramic nozzle, and specifically discloses the following technical solutions:

[0004] A ceramic nozzle includes a ceramic inner tube and a metal sleeve sleeved outside the ceramic inner tube. The diameter of the upper inner hole of the ceramic inner tube is larger than that of the lower inner hole, and the upper inner hole and the lower inner hole are connected through a frustum-shaped hole. An upper clamping platform is fixedly connected to the inside of the metal sleeve at the top of the ceramic inner tube, and a lower clamping platform is fixedly connected to the inside of the metal sleeve at the bottom of the ceramic inner tube. The upper clamping platform and the lower clamping platform are used to limit and fix the ceramic inner tube. A limiting insertion hole is opened on the side wall of the metal sleeve, and a limiting slot is opened on the outer wall of the ceramic inner tube at a position corresponding to the limiting insertion hole. A metal insert is installed in the limiting insertion hole and the limiting slot.

[0005] Further, both the upper clamping platform and the lower clamping platform are annular. The diameter of the through hole in the center of the upper clamping platform is greater than or equal to the diameter of the upper inner hole of the ceramic inner tube, and the diameter of the through hole in the center of the lower clamping platform is greater than or equal to the diameter of the lower inner hole of the ceramic inner tube.

[0006] Further, structural adhesive is filled between the outer side wall of the ceramic inner tube and the inner side wall of the metal sleeve, between the upper end face of the ceramic inner tube and the bottom face of the upper clamping platform, and between the lower end face of the ceramic inner tube and the top face of the lower clamping platform.

[0007] Further, both the upper clamping platform and the lower clamping platform are welded inside the metal sleeve, and a 45° welding groove is provided between the outer top end of the upper clamping platform and the inner wall of the metal sleeve, and a 45° welding groove is provided between the outer bottom end of the lower clamping platform and the inner wall of the metal sleeve.

[0008] Further, the limiting slot is opened at a position corresponding to the lower part of the ceramic inner tube and the inner hole at the lower end.

[0009] Further, one side of the metal insert close to the limiting slot is arranged flat, and the side far from the limiting slot is an arc structure adapted to the outer side wall of the metal sleeve.

[0010] Further, the metal insert and the limiting jack are fixedly connected by welding.

[0011] Further, 45° welding grooves are provided between the lower surface of the metal insert and the lower side wall of the limiting jack and between the upper surface of the metal insert and the upper side wall of the limiting jack.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] In the present invention, a ceramic inner tube is fixed inside the metal sleeve. The ceramic inner tube has better wear resistance, so it has a longer service life, does not need to be replaced frequently, and reduces the maintenance cost.

[0014] Limiting jacks are opened on the side wall of the metal sleeve, and limiting slots corresponding to the limiting jacks are opened on the outer wall of the ceramic inner tube. Metal inserts are installed in the limiting jacks and the limiting slots, which can facilitate the fixing of the ceramic inner tube and the metal sleeve together. Description of the Drawings

[0015] Figure 1 is a sectional view of the overall structure of the present invention.

[0016] Figure 2 is a sectional view of the ceramic inner tube in the present invention.

[0017] Figure 3 is Figure 1 a sectional view in the A-A direction in

[0018] Figure 4 is a top view of the metal insert in the present invention.

[0019] 1 - Ceramic inner tube, 2 - Metal sleeve, 3 - Structural adhesive, 4 - Upper clamping table, 5 - Lower clamping table, 6 - Metal insert, 7 - Limiting slot. Detailed Embodiment

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Referring to Figures 1-4 , a ceramic nozzle includes a ceramic inner tube 1 and a metal sleeve 2 sleeved outside the ceramic inner tube 1. The diameter of the upper inner hole of the ceramic inner tube 1 is larger than that of the lower inner hole, and the upper inner hole and the lower inner hole are communicated through a frustum-shaped hole. An upper clamping platform 4 is fixedly connected to the top of the ceramic inner tube 1 inside the metal sleeve 2, and a lower clamping platform 5 is fixedly connected to the bottom of the ceramic inner tube 1 inside the metal sleeve 2. The upper clamping platform 4 and the lower clamping platform 5 are used to limit and fix the ceramic inner tube 1. A limiting jack is opened on the side wall of the metal sleeve 2, and a limiting slot 7 is opened on the outer wall of the ceramic inner tube 1 corresponding to the limiting jack. A metal insert 6 is installed in the limiting jack and the limiting slot 7.

[0022] The ceramic inner tube 1 is fixedly installed inside the metal sleeve 2. The ceramic inner tube 1 has better wear resistance, so it has a longer service life, does not need to be replaced frequently, and reduces the maintenance cost. After the metal insert 6 is inserted into the aligned limiting slot 7 and limiting jack, the metal sleeve 2 and the ceramic inner tube 1 can be limited and fixed.

[0023] In this embodiment, both the upper clamping platform 4 and the lower clamping platform 5 are annular. The diameter of the through hole in the center of the upper clamping platform 4 is greater than or equal to the diameter of the upper inner hole of the ceramic inner tube 1, and the diameter of the through hole in the center of the lower clamping platform 5 is greater than or equal to the diameter of the lower inner hole of the ceramic inner tube 1, so as to ensure that the upper clamping platform 4 and the lower clamping platform 5 will not hinder the passage of the catalyst in the ceramic inner tube 1.

[0024] In this embodiment, structural adhesive 3 is filled between the outer side wall of the ceramic inner tube 1 and the inner side wall of the metal sleeve 2, between the upper end face of the ceramic inner tube 1 and the bottom face of the upper clamping platform 4, and between the lower end face of the ceramic inner tube 1 and the top face of the lower clamping platform 5, so as to further fix the ceramic inner tube 1 and improve the stability of the ceramic inner tube 1.

[0025] In this embodiment, both the upper clamping platform 4 and the lower clamping platform 5 are welded inside the metal sleeve 2, and a 45° welding groove is provided between the outer top end of the upper clamping platform 4 and the inner wall of the metal sleeve 2, and a 45° welding groove is provided between the outer bottom end of the lower clamping platform 5 and the inner wall of the metal sleeve 2 to ensure the welding strength.

[0026] In this embodiment, the limiting slot 7 is opened at a position corresponding to the lower part of the ceramic inner tube 1 and the lower inner hole, so as to reserve enough side wall thickness between the limiting slot 7 and the inner hole of the ceramic inner tube 1.

[0027] In this embodiment, one side of the metal insert 6 close to the limiting slot 7 is set flat, and the side far from the limiting slot 7 is an arc structure adapted to the outer side wall of the metal sleeve 2, so as to ensure that the insertion of the metal insert 6 will not affect the outer shape of the metal sleeve 2.

[0028] In this embodiment, the metal insert 6 is fixedly welded to the limit jack.

[0029] In this embodiment, 45° welding grooves are provided between the lower surface of the metal insert 6 and the lower side wall of the limit jack, and between the upper surface of the metal insert 6 and the upper side wall of the limit jack, so as to ensure the welding strength.

[0030] As mentioned above, it is only a preferred embodiment of the present invention, and does not impose any limitation on the technical scope of the present invention. Therefore, any minor modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still belong to the scope of the technical solution of the present invention.

Claims

1. A ceramic nozzle, characterized in that, It includes a ceramic inner tube and a metal sleeve sleeved outside the ceramic inner tube. The diameter of the inner hole at the upper end of the ceramic inner tube is larger than that of the inner hole at the lower end, and the upper inner hole and the lower inner hole are connected through a frustum-shaped hole. At the top of the ceramic inner tube inside the metal sleeve, an upper clamping platform is fixedly connected. At the bottom of the ceramic inner tube inside the metal sleeve, a lower clamping platform is fixedly connected. The upper clamping platform and the lower clamping platform are used to limit and fix the ceramic inner tube. A limiting jack is opened on the side wall of the metal sleeve, and a limiting slot is opened on the outer wall of the ceramic inner tube corresponding to the limiting jack. A metal insert is installed in the limiting jack and the limiting slot.

2. A ceramic nozzle according to claim 1, characterized in that, Both the upper clamping platform and the lower clamping platform are annular. The diameter of the through hole at the center of the upper clamping platform is greater than or equal to the diameter of the upper inner hole of the ceramic inner tube. The diameter of the through hole at the center of the lower clamping platform is greater than or equal to the diameter of the lower inner hole of the ceramic inner tube.

3. A ceramic nozzle according to claim 1, characterized in that, Structural adhesive is filled between the outer side wall of the ceramic inner tube and the inner side wall of the metal sleeve, between the upper end face of the ceramic inner tube and the bottom face of the upper clamping platform, and between the lower end face of the ceramic inner tube and the top face of the lower clamping platform.

4. A ceramic nozzle according to claim 1, characterized in that, Both the upper clamping platform and the lower clamping platform are welded inside the metal sleeve, and a 45° welding groove is provided between the outer top end of the upper clamping platform and the inner wall of the metal sleeve. A 45° welding groove is provided between the outer bottom end of the lower clamping platform and the inner wall of the metal sleeve.

5. A ceramic nozzle according to claim 1, characterized in that, The limiting slot is opened at a position corresponding to the lower part of the ceramic inner tube and the lower inner hole.

6. A ceramic nozzle according to claim 1, characterized in that, One side of the metal insert close to the limiting slot is set flat, and the side far from the limiting slot is an arc structure adapted to the outer side wall of the metal sleeve.

7. A ceramic nozzle according to claim 1, characterized in that, The metal insert is fixedly welded to the limiting jack.

8. A ceramic nozzle according to claim 7, characterized in that, A 45° welding groove is provided between the lower surface of the metal insert and the lower side wall of the limiting jack and between the upper surface of the metal insert and the upper side wall of the limiting jack.

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