Composite ceramic nozzle for distributor

Abstract

A composite ceramic nozzle for a distributor comprises a ceramic tube core, an inner sleeve and an outer sleeve, an outer ring groove and an outer flange are arranged on the ceramic tube core, the outer flange is located at the outlet end of a medium, and a check ring is installed in the outer ring groove; the inner sleeve is sleeved on the ceramic tube core and is limited between the retainer ring and the outer flange; the inner sleeve is provided with a local external thread, the outer sleeve is provided with an inner flange and a local internal thread, after the outer sleeve is in threaded connection with the inner sleeve, the inner flange of the outer sleeve abuts against the medium inlet end of the ceramic tube core, and a first annular space is formed in a non-threaded area between the inner sleeve and the outer sleeve. When the composite ceramic nozzle and the distributor are fully welded, the welding position is located at the position, corresponding to the first annular space, of the outer sleeve, the first annular space can release welding deformation of the outer sleeve, the inner sleeve can isolate deformation of the outer sleeve, and the situation that the welding deformation and residual stress of the welding deformation directly act on the ceramic tube core, and the ceramic tube core is squeezed to be cracked and broken is avoided.

Description

Technical Field

[0001] The invention relates to the field of petroleum refining equipment, in particular to a composite ceramic nozzle for a distributor. Background Art

[0002] In the petrochemical, electric power, metallurgical and other industries, nozzle wear caused by high-temperature and high-speed gas-solid medium scouring and solid particle back-inhalation has always plagued the long-term operation of gas-solid fluidized reaction equipment. In recent years, composite ceramic nozzles have been widely used due to their good wear resistance and low cost.

[0003] See attached Figure 1 . The existing composite ceramic nozzle is mainly composed of a ceramic tube core 10, a metal sleeve 101 and a metal ring sheet 102. During assembly, the ceramic tube core 10 is inserted into the metal sleeve 101, and then the metal ring sheet 102 is welded to the metal sleeve 101. The ceramic tube core 10 has good high temperature resistance, wear resistance and corrosion resistance, but it is brittle and easy to break. The function of the metal ring sheet 102 is to prevent the ceramic tube core 10 from escaping from the metal sleeve 101, and the function of the metal sleeve 101 is to prevent the ceramic tube core 10 from being bumped, and at the same time facilitate the welding of the composite ceramic nozzle on the distributor. During installation, the composite ceramic nozzle is welded in the mounting hole of the distributor (distribution ring, distribution pipe, etc.) 80. In order to ensure the sealing of the distributor, a full welding process is usually adopted.

[0004] During the manufacturing and installation of the composite ceramic nozzle, we found that some ceramic tube cores were broken. In severe cases, the breakage rate of the ceramic tube core was as high as more than 20% in one operating cycle. The main reason for the breakage of the ceramic tube core is that the composite ceramic nozzle is welded during manufacturing and installation. Especially during installation, the local high temperature, welding deformation, and residual welding stress generated by the full welding of the metal sleeve directly act on the ceramic tube core, squeezing and even crushing the ceramic tube core. Since the composite ceramic nozzle is welded to the distributor as a whole, it is difficult and costly to replace the composite ceramic nozzle.

[0005] In addition, during operation, the medium outlet of the composite ceramic nozzle is severely eroded by the eddy current of the high-speed medium (including solid particles), which causes the metal ring to wear quickly. Once the metal ring falls off due to wear, the ceramic core will fall out of the metal sleeve. Summary of the invention

[0006] In order to overcome the shortcomings of the background technology, the present invention discloses a composite ceramic nozzle for a distributor, the purpose of which is: 1. Improve the assembly structure of the composite ceramic nozzle itself, replace welding with threaded connection to avoid the ceramic core from breaking during assembly; 2. Improve the ceramic tube core and fixing method of the composite ceramic nozzle to prevent the ceramic tube core from falling out due to wear of the metal sleeve end during operation; 3. Prevent welding deformation and its residual stress from cracking and crushing the ceramic tube core.

[0007] Specifically, the present invention adopts the following technical solutions: A composite ceramic nozzle for a distributor comprises a ceramic tube core, an inner sleeve and an outer sleeve, wherein an outer annular groove and an outer flange are provided on the ceramic tube core, wherein the outer flange is located at the outlet end of the medium, and a retaining ring is installed in the outer annular groove; the inner sleeve is sleeved on the ceramic tube core, and is limited between the retaining ring and the outer flange; the inner sleeve has a partial outer thread, and the outer sleeve has an inner flange and a partial inner thread, and after the outer sleeve is screwed to the inner sleeve, the inner flange of the outer sleeve abuts against the medium inlet end of the ceramic tube core, and a first annular space is formed in the non-threaded area between the inner sleeve and the outer sleeve; when the composite ceramic nozzle and the distributor are fully welded, the welding position is located at the position of the outer sleeve corresponding to the first annular space, and the first annular space is used to release the welding deformation of the outer sleeve.

[0008] After implementing the above technical solution, compared with the background technology, the beneficial effects produced are: 1. The composite ceramic nozzle adopts a threaded assembly structure instead of a welding structure, so the ceramic core will not break.

[0009] 2. The ceramic tube core has good wear resistance. An outer flange is set at the medium outlet end of the ceramic tube core. During operation, the outer flange separates the inner sleeve from the gas-solid medium, so that the inner sleeve is prevented from being eroded by the gas-solid medium, thereby protecting the inner sleeve.

[0010] 3. The outer sleeve and the inner sleeve have a certain strength, and the whole formed by their combination protects the ceramic tube core during use and transportation.

[0011] 4. When the composite ceramic nozzle and the distributor are fully welded, the first annular space can release the welding deformation of the outer sleeve, and the inner sleeve can prevent the further deformation of the outer sleeve, thereby preventing the welding deformation and its residual stress from directly acting on the ceramic core to crack and crush the ceramic core.

[0012] 5. Use the welding deformation of the outer sleeve to lock the threaded connection structure between the inner sleeve and the outer sleeve to prevent the ceramic tube core from shifting due to loose threads during operation.

[0013] To further improve the technical solution, the first annular space is close to the outlet end of the medium; after the outer sleeve and the inner sleeve are threadedly connected, a second annular space is formed between the outer sleeve and the ceramic tube core.

[0014] After the above technical solution is implemented, the beneficial effect is that the second annular space can reduce the heat conduction from the outer sleeve to the ceramic core during full welding. Since the ceramic nozzle has a limited extension length on the distributor, in order to facilitate the release of welding deformation, the first annular space is close to the outlet end of the medium.

[0015] To further improve the technical solution, a shaped plastic refractory material is arranged in the second annular space and is wound around and fixed on the ceramic tube core.

[0016] After the above technical solution is implemented, the beneficial effects are as follows: the plastic refractory material is arranged in the second annular space, which can not only isolate heat conduction, but also support and protect the ceramic tube core.

[0017] To further improve the technical solution, a third annular space is formed between the inner sleeve and the ceramic tube core.

[0018] After the above technical solution is implemented, the beneficial effects are as follows: the inner sleeve has a protective effect on the ceramic tube core, and the third annular space is provided, so that even if the inner sleeve is deformed, it will not cause extrusion to the ceramic tube core.

[0019] To further improve the technical solution, a shaped plastic refractory material is arranged in the third annular space and is wound around and fixed on the ceramic tube core.

[0020] After the above technical solution is implemented, the beneficial effect produced is: the plastic refractory material is arranged in the third annular space, which can support and protect the ceramic tube core.

[0021] To further improve the technical solution, the retaining ring is a split-type retaining ring or an open-type retaining ring.

[0022] After implementing the above technical solution, the beneficial effect is that the retaining ring provides axial limit for the inner sleeve. The purpose of using a split retaining ring or an open retaining ring is to facilitate its installation and fixation on the ceramic tube core.

[0023] To further improve the technical solution, a plastic refractory material is applied between the inner flange of the outer sleeve and the medium inlet end of the ceramic tube core.

[0024] After implementing the above technical solution, the beneficial effects are: applying plastic refractory material between the inner flange of the outer sleeve and the medium inlet end of the ceramic tube core can, on the one hand, avoid rigid contact between the inner flange and the ceramic tube core, and on the other hand, play a sealing role to prevent medium gas from entering the second annular space.

[0025] To further improve the technical solution, a tightening nut is threadedly connected to the inner sleeve, and the tightening nut is used to eliminate the assembly gap between the inner sleeve and the outer flange.

[0026] After the implementation of the above technical solution, the beneficial effects are as follows: due to the manufacturing process, the distance between the retaining ring and the outer flange is difficult to control. Before the outer sleeve is assembled, the axial position of the retaining ring and the inner sleeve on the ceramic tube core is not fixed, which easily causes the retaining ring to fall off and is inconvenient to assemble. After the tightening nut is set, the axial position of the retaining ring and the inner sleeve on the ceramic tube core can be tightened and fixed in advance, thereby improving the assembly efficiency.

[0027] To further improve the technical solution, the tightening nut abuts against the retaining ring, and a plastic refractory material is applied between the inner sleeve and the outer flange of the ceramic tube core.

[0028] After the above technical solution is implemented, the beneficial effect produced is that the plastic refractory material can avoid rigid contact between the inner sleeve and the outer flange of the ceramic tube core.

[0029] To further improve the technical solution, the tightening nut abuts against the outer flange of the ceramic tube core, and the annular gap between the tightening nut and the ceramic tube core is filled with plastic refractory material.

[0030] After the above technical solution is implemented, the beneficial effect is that the plastic refractory material can fill the gap between the inner sleeve and the outer flange of the ceramic tube core, avoiding rigid contact between the tightening nut and the outer flange of the ceramic tube core.

[0031] To further improve the technical solution, a clamping structure or an anchoring structure is provided on the inner sleeve.

[0032] After the above technical solution is implemented, the beneficial effect produced is: a clamping structure or an anchoring structure is provided on the inner sleeve, which is conducive to the threaded connection between the inner sleeve and the outer sleeve.

[0033] To further improve the technical solution, the surface of the distributor is paved with a wear-resistant lining, the outer flange of the ceramic tube core is embedded in the wear-resistant lining, and its outer end face is flush with the wear-resistant lining; the clamping structure or anchoring structure is embedded in the wear-resistant lining to anchor the wear-resistant lining so that the composite ceramic nozzle is tightly combined with the wear-resistant lining.

[0034] After the above technical solution is implemented, the beneficial effects are as follows: the wear-resistant lining can protect the inner sleeve and the outer sleeve, and prevent the inner sleeve and the outer sleeve from being eroded by the gas-solid medium. The outer flange, clamping structure or anchoring structure of the ceramic core can anchor the wear-resistant lining, and prevent the wear-resistant lining around the composite ceramic nozzle from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Attached Figure 1 Shown is a schematic structural diagram of an existing composite ceramic nozzle.

[0036] Attached Figure 2Shown is a schematic diagram of the installation structure of the composite ceramic nozzle on the distribution pipe in Example 1.

[0037] Attached Figure 3 Shown is a schematic diagram of the cross-sectional structure of the ceramic tube core in Example 1.

[0038] Attached Figure 4 What is shown is a schematic diagram of the installation structure of the inner sleeve on the ceramic tube core in Example 1.

[0039] Attached Figure 5 What is shown is a schematic diagram of the connection structure between the outer sleeve and the inner sleeve in Example 1.

[0040] Attached Figure 6 Shown is a schematic diagram of the cross-sectional structure of the composite ceramic nozzle in Example 2.

[0041] Attached Figure 7 Shown is a schematic diagram of an implementation structure of the composite ceramic nozzle in Example 3.

[0042] Attached Figure 8 Shown is another schematic diagram of the structure of the composite ceramic nozzle in Example 3.

[0043] Attached Figure 9-10 Shown is a schematic diagram of the structure of the composite ceramic nozzle in Example 4.

[0044] Attached Fig.11 Shown is a schematic diagram of the anchoring structure in Example 5.

[0045] Attached Fig.12 Shown is a schematic diagram of the installation structure of the composite ceramic nozzle on the distribution pipe in Example 5. Attached photos

[0046] 10. Ceramic tube core; 11. Outer ring groove; 12. Outer flange; 20. Inner casing; 21. External thread; 22. Clamping structure; 23. Anchoring structure; 30. Outer sleeve; 31. Inner flange; 32. Internal thread; 40. retaining ring; 51. First annular space; 52. Second annular space; 53. Third annular space; 61. Ceramic fiber paper; 62. Refractory clay; 70. Tighten the nut; 80. Distribution pipe; 90. Wear-resistant lining; 101. Metal sleeve; 102. Metal ring. DETAILED DESCRIPTION

[0047] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. It should be noted that in the description of the present invention, the terms "front", "rear", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Embodiment 1:

[0048] See attached Figure 2 A composite ceramic nozzle for a distributor is mainly composed of a ceramic tube core 10, an inner sleeve 20 and an outer sleeve 30, and is used to introduce a gas medium or a liquid medium into the distributor. The composite ceramic nozzle is welded in a mounting hole on a distribution pipe 80, and a wear-resistant lining 90 is laid on the distribution pipe 80.

[0049] See attached Figure 3 , attached Figure 3 FIG. 1 is a schematic diagram of the cross-sectional structure of the ceramic tube core 10. Figure 3 It can be seen that an outer annular groove 11 and an outer flange 12 are provided on the ceramic tube core 10, wherein the outer flange 12 is located at the outlet end of the medium.

[0050] See attached Figure 4 , attached Figure 4 FIG. 2 shows a schematic diagram of the installation structure of the inner sleeve 20 on the ceramic tube core 10. Figure 4 It can be seen that the inner sleeve 20 is in a round tube shape and has an external thread 21 on the upper portion of the inner sleeve 20. A retaining ring 40 is installed in the outer ring groove 11 of the ceramic core 10. The inner sleeve 20 is sleeved on the ceramic core 10 and is limited between the retaining ring 40 and the outer flange 12.

[0051] The ceramic tube core 10 cannot be threaded, and one of the functions of the inner sleeve 20 is to provide a connection structure of the outer thread 21 for the ceramic tube core 10. The function of the retaining ring 40 is to provide an axial limit for the inner sleeve 20. In order to facilitate the installation and fixation of the inner sleeve 20 on the ceramic tube core 10, the retaining ring 40 can be a split-type retaining ring or an open-type retaining ring.

[0052] See attached Figure 5 , attached Figure 5 FIG. 2 shows a schematic diagram of the connection structure between the outer sleeve 30 and the inner sleeve 20. Figure 5 It can be seen that the upper end of the outer sleeve 30 is provided with an inner flange 31, and the lower part is provided with a section of internal thread 32. After the outer sleeve 30 is threadedly connected with the inner sleeve 20, the inner flange 31 of the outer sleeve 30 abuts against the medium inlet end of the ceramic tube core 10, and the upper end of the inner sleeve 20 abuts against the retaining ring 40. A first annular space 51 is formed in the non-threaded area between the inner sleeve 20 and the outer sleeve 30, and the first annular space 51 is close to the outlet end of the medium. A second annular space 52 is formed between the outer sleeve 30 and the ceramic tube core 10, and the second annular space 52 is close to the inlet end of the medium.

[0053] Again refer to the attached Figure 2 An outer flange 12 is provided at the medium outlet end of the ceramic tube core 10 . Firstly, the outer flange 12 is wear-resistant and can withstand the erosion of the gas-solid medium, thus protecting the inner sleeve 20 . Secondly, the outer flange 12 is embedded in the wear-resistant lining 90 , thus anchoring the wear-resistant lining 90 .

[0054] When the composite ceramic nozzle and the distribution pipe 80 are fully welded, the welding position is set at the position of the outer sleeve 30 corresponding to the first annular space 51. The outer sleeve 30 will be greatly deformed when fully welded. Due to the existence of the first annular space 51, the outer sleeve 30 has sufficient space to release the welding deformation, avoiding the welding deformation and its residual stress directly acting on the ceramic tube core 10, and squeezing and crushing the ceramic tube core 10. The inner sleeve 20 is located between the first annular space 51 and the ceramic tube core 10. Since the inner sleeve 20 will not be red-hot softened during the welding process and maintain a certain strength, the inner sleeve 20 can isolate the outer sleeve 30 and protect the ceramic tube core 10.

[0055] Since the outer sleeve 30 and the inner sleeve 20 are screwed together, we were worried that the ceramic tube core 10 would fall off due to loose threads during operation. However, we found in long-term engineering applications that the ceramic tube core 10 did not fall off due to loose threads. The reason is that the welding deformation of the outer sleeve 30 destroys the thread structure between the inner sleeve 20 and the outer sleeve 30, so the threads will not loosen, and the inner sleeve 20 and the outer sleeve 30 form an integrated structure. Embodiment 2:

[0056] See attached Figure 6 Compared with Example 1, this embodiment has four improved technical points.

[0057] The first improved technical point is that a formed plastic refractory material is arranged in the second annular space 52. In this embodiment, the plastic refractory material is ceramic fiber paper 61, which is wound and fixed on the ceramic tube core 10. The ceramic fiber paper 61 can isolate heat conduction and support and protect the ceramic tube core 10.

[0058] The second improved technical point is that a plastic refractory material is applied between the inner flange 31 of the outer sleeve 30 and the medium inlet end of the ceramic tube core 10. In this embodiment, the plastic refractory material is a refractory cement 62. After the outer sleeve 30 and the inner sleeve 20 are tightened by threads, the inner flange 31 will produce an extrusion force on the ceramic tube core 10. Applying the refractory cement 62 can avoid the rigid contact between the ceramic tube core 10 and the inner flange 31, thereby preventing the ceramic tube core 10 from breaking.

[0059] The third improved technical point is to apply a plastic refractory material between the inner sleeve 20 and the outer flange 12 of the ceramic tube core 10. In this embodiment, the plastic refractory material is a refractory cement 62. Applying the refractory cement 62 can eliminate the gap and prevent the outer flange 12 of the ceramic tube core 10 from rigidly contacting the inner sleeve 20, thereby preventing the outer flange 12 from breaking.

[0060] The fourth improved technical point is that the upper groove surface of the outer ring groove 11 of the ceramic tube core 10 is inclined upward and has an outer cone surface. Correspondingly, the retaining ring 40 has an inner cone surface, and the inner cone surface cooperates with the outer cone surface. After the outer sleeve 30 and the inner sleeve 20 are tightened by threads, the inner sleeve 20 will generate an extrusion force on the upper groove surface of the outer ring groove 11 through the retaining ring 40, and this extrusion force may cause the ceramic tube core 10 to break. After the cone surface is matched, part of the extrusion force is dispersed to the outer sleeve 30 by the cone surface, which can reduce the extrusion force on the outer ring groove 11. Embodiment 3:

[0061] Due to the firing process of the ceramic tube core 10, the distance between the outer ring groove 11 and the outer flange 12 is difficult to control. During the threaded connection between the outer sleeve 30 and the inner sleeve 20, the retaining ring moves up and down or overturns due to the axial non-positioning of the retaining ring, affecting the reliability of the threaded connection between the inner and outer sleeves.

[0062] See attached Figure 7 A jacking nut 70 is screwed on the upper part of the inner sleeve 20. By screwing up the jacking nut 70, the lower end of the inner sleeve 20 is pressed against the outer flange 12 to eliminate the play gap. The retaining ring 40 is axially positioned before installing the outer sleeve 30. If the gap between the inner sleeve 20 and the retaining ring 40 is too large, refractory cement 62 can also be applied in the gap.

[0063] In addition, in order to fix the inner sleeve 20 and facilitate the threaded connection between the outer sleeve 30 and the inner sleeve 20, a clamping structure 22 is provided at the lower end of the inner sleeve 20. Figure 7 In the embodiment, the clamping structure 22 is a disc body, and knurling is provided on the edge of the disc body. By clamping the disc body, the outer sleeve 30 and the inner sleeve 20 can be screwed together.

[0064] See attached Figure 8 A locking nut 70 can also be screwed on the lower part of the inner sleeve 20, and the upper end of the inner sleeve 20 can be pressed against the retaining ring 40 by screwing down the locking nut 70 to eliminate the play gap, and the retaining ring 40 can be axially positioned before installing the outer sleeve 30. If the gap between the inner sleeve 20 and the outer flange 12 is too large, refractory cement 62 can also be applied in the gap, and the contact surface between the locking nut 70 and the outer flange 12 of the ceramic tube core must be coated with cement to avoid rigid contact between the two.

[0065] Attached Figure 8 In the embodiment, the clamping structure 22 is three groups of hexagonal clamping surfaces. By clamping one group of clamping surfaces with a wrench, the outer sleeve 30 and the inner sleeve 20 can be screwed together. It is worth noting that the clamping structure 22 is not limited to the above two structures, and can also be other shapes and structures, such as holes, shafts, teeth and other structures. Embodiment 4:

[0066] See attached Fig. 9 In this embodiment, the lower groove surface of the outer annular groove 11 on the ceramic tube core 10 coincides with the outer flange 12. In this way, a third annular space 53 is formed between the inner sleeve 20 and the ceramic tube core 10. The inner sleeve 20 has a protective effect on the ceramic tube core 10. The third annular space 53 is provided so that the ceramic tube core 10 will not be squeezed even if the inner sleeve 20 is deformed.

[0067] See attached Fig.10 , a ceramic fiber paper 61 may also be arranged in the third annular space 53. Before installing the inner sleeve 20, the ceramic fiber paper 61 is wound and fixed on the ceramic tube core 10, and the ceramic fiber paper 61 can support and protect the ceramic tube core 10. Embodiment 5:

[0068] See attached Fig.11 The inner sleeve 20 may also be provided with an anchoring structure 23, which is buried in the wear-resistant lining 90 during installation to anchor the wear-resistant lining 90. In this embodiment, the anchoring structure 23 is a plurality of anchoring rods screwed onto the inner sleeve 20.

[0069] See attached Fig.12The outer surface of the distribution pipe 80 is paved with a wear-resistant lining 90, and the outer flange 12 of the ceramic tube core 10 is embedded in the wear-resistant lining 90, and its outer end surface is flush with the wear-resistant lining 90. The anchor rod is embedded in the wear-resistant lining 90, which plays an anchoring role for the wear-resistant lining 90, so that the composite ceramic nozzle and the wear-resistant lining 90 are tightly combined to prevent the wear-resistant lining 90 around the composite ceramic nozzle from falling off. The wear-resistant lining 90 can protect the inner sleeve 20 and the outer sleeve 30, and prevent the inner sleeve 20 and the outer sleeve 30 from being eroded by the gas-solid medium.

[0070] Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A composite ceramic nozzle for a distributor, comprising a ceramic tube core, an inner sleeve and an outer sleeve, characterized in that: An outer ring groove and an outer flange are provided on the ceramic tube core, wherein the outer flange is located at the outlet end of the medium, and a retaining ring is installed in the outer ring groove; the inner sleeve is sleeved on the ceramic tube core, and is limited between the retaining ring and the outer flange; the inner sleeve has a partial outer thread, and the outer sleeve has an inner flange and a partial inner thread. After the outer sleeve is screwed with the inner sleeve, the inner flange of the outer sleeve abuts against the medium inlet end of the ceramic tube core, and a first annular space is formed in the non-threaded area between the inner sleeve and the outer sleeve; when the composite ceramic nozzle and the distributor are fully welded, the welding position is located at the position of the outer sleeve corresponding to the first annular space, and the first annular space is used to release the welding deformation of the outer sleeve.

2. A composite ceramic nozzle for a distributor as claimed in claim 1, characterized in that: The first annular space is close to the outlet end of the medium; after the outer sleeve is threadedly connected with the inner sleeve, a second annular space is formed between the outer sleeve and the ceramic tube core.

3. A composite ceramic nozzle for a distributor as claimed in claim 2, characterized in that: A shaped plastic refractory material is arranged in the second annular space and is wound around and fixed on the ceramic tube core.

4. A composite ceramic nozzle for a distributor as claimed in claim 1, characterized in that: A third annular space is formed between the inner sleeve and the ceramic tube core.

5. A composite ceramic nozzle for a distributor as claimed in claim 4, characterized in that: The third annular space is provided with a shaped plastic refractory material which is wound around and fixed on the ceramic tube core.

6. A composite ceramic nozzle for a distributor as claimed in claim 1, characterized in that: The retaining ring is a split-flap retaining ring or an open retaining ring.

7. A composite ceramic nozzle for a distributor as claimed in claim 1, characterized in that: A plastic refractory material is applied between the inner flange of the outer sleeve and the medium inlet end of the ceramic tube core.

8. The composite ceramic nozzle for a distributor as claimed in claim 1, characterized in that: A tightening nut is threadedly connected to the inner sleeve, and the tightening nut is used to eliminate the assembly gap between the inner sleeve and the outer flange.

9. A composite ceramic nozzle for a distributor as claimed in claim 8, characterized in that: The tightening nut abuts against the retaining ring, and plastic refractory material is applied between the inner sleeve and the outer flange of the ceramic tube core.

10. The composite ceramic nozzle for a distributor as claimed in claim 8, characterized in that: The locking nut abuts against the outer flange of the ceramic tube core, and the annular gap between the locking nut and the ceramic tube core is filled with plastic refractory material.

11. The composite ceramic nozzle for a distributor according to claim 1, characterized in that: A clamping structure or an anchoring structure is provided on the inner sleeve.

12. A composite ceramic nozzle for a distributor as claimed in claim 11, characterized in that: The surface of the distributor is paved with a wear-resistant lining, the outer flange of the ceramic tube core is embedded in the wear-resistant lining, and its outer end face is flush with the wear-resistant lining; the clamping structure or anchoring structure is embedded in the wear-resistant lining and is used to anchor the wear-resistant lining so that the composite ceramic nozzle is tightly combined with the wear-resistant lining.

Images