Inner riser terminal outlet structure

Abstract

The utility model discloses a terminal outlet structure of an inner lifting pipe. The terminal outlet structure comprises an inner lifting pipe barrel body, an inner lifting pipe end socket and a regular cone outlet square box, the inner lifting pipe end socket is fixedly connected to the top of the inner lifting pipe barrel; and the regular cone outlet square box is radially or tangentially arranged outside the top side of the inner lifting pipe barrel. The device is simple, reliable and economical in structure, oil gas and a catalyst enter the coarse cyclone separator slowly after being rectified by the inclined divergent flow channel formed by the inner lifting pipe barrel and the regular cone outlet square box, a medium flow field is greatly optimized and relieved, excessive catalyst fine powder formed by beating and breaking of the catalyst due to sudden change of the flow field of the flow channel is avoided, and the service life of the catalyst is prolonged. And the possibility of reducing the solid content in the oil slurry is provided, so that the service life of the oil slurry pump can be ensured.

Description

Technical Field

[0001] The utility model relates to a riser reactor in a petrochemical catalytic cracking process, in particular to an inner riser terminal outlet structure. Background Art

[0002] In the prior art, oil, gas and catalyst in catalytic devices enter the coarse cyclone separator through the inner riser cylinder and the outlet square box on the top of the inner riser. The flow field of oil, gas and catalyst directly changes from vertical upward to horizontal outward. During this flow field mutation process, the catalyst will rush to and hit the top plate in the outlet direction and break, resulting in catalyst fine powder, reducing the efficiency of the coarse cyclone separator, causing the subsequent coarse cyclone separator to be unable to separate, and the catalyst fine powder enters the oil slurry to increase the solid content of the oil slurry, thereby affecting the service life of the oil slurry pump. Utility Model Content

[0003] In order to solve the technical problems existing in the above-mentioned prior art, the utility model provides an inner riser terminal outlet structure.

[0004] The utility model discloses an inner riser terminal outlet structure, comprising an inner riser barrel, an inner riser head and a regular cone outlet square box; the inner riser head is fixedly connected to the top of the inner riser barrel; the regular cone outlet square box is radially arranged outside the top side of the inner riser barrel.

[0005] Another structure of the utility model is: an inner riser terminal outlet structure: including an inner riser barrel, an inner riser head, and a regular cone outlet square box; the inner riser head is fixedly connected to the top of the inner riser barrel; the regular cone outlet square box is tangentially arranged on the outside of the top side of the inner riser barrel.

[0006] The number of right cone outlet square boxes is set according to the specific needs of the project. The angle between the cone wall of the right cone outlet square box and the outer wall of the inner lifting cylinder is an obtuse angle. When the structure allows, the angle should be as large as possible.

[0007] In the utility model, all surfaces contacting gas-solid medium are provided with wear-resistant linings and wear-resistant lining anchoring pieces.

[0008] Preferably, the wear-resistant lining anchor is a tortoise shell mesh or a variable angle anchor plate.

[0009] The terminal outlet structure of the inner riser is a structure for sending the oil gas and catalyst after the catalytic reaction to the rough cyclone separator, and the positive cone outlet square box is connected to the inlet of the rough cyclone separator.

[0010] The utility model has the following beneficial effects:

[0011] 1) The oil, gas and catalyst enter the coarse cyclone separator after rectification through the inclined gradually expanding flow channel formed by the inner riser barrel and the positive cone outlet box at the top of the inner riser, which greatly optimizes and eases the flow field of the mixed medium of oil, gas and catalyst, avoids the formation of a large amount of catalyst fine powder due to the sudden change of the flow field in the flow channel, and provides the possibility of reducing the solid content in the oil slurry, thereby ensuring the service life of the oil slurry pump.

[0012] 2) The terminal outlet structure of the internal riser is simple, reliable and economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the terminal outlet structure of the prior art riser;

[0014] Figure 2 It is a schematic diagram of the connection between the utility model and the coarse cyclone separator;

[0015] Figure 3 It is a schematic diagram of the structure of the utility model when the positive cone outlet square box is radially arranged;

[0016] Figure 4 It is a structural schematic diagram of the utility model when the positive cone outlet square box is tangentially arranged;

[0017] Figure 5 It is a top view schematic diagram of the utility model connected with the coarse cyclone separator when the positive cone outlet square box is radially arranged;

[0018] Figure 6 It is a top view schematic diagram of the utility model connected with the coarse cyclone separator when the positive cone outlet square box is tangentially arranged;

[0019] In the figure: 1-inner riser barrel, 2-inner riser head, 3-positive cone outlet square box, 4-coarse cyclone separator, 5-rectangular outlet square box. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] Existing technologies such as Figure 1 As shown, in the catalytic device, the oil gas and catalyst directly enter the coarse cyclone separator 4 through the inner lifting tube barrel 1 and the rectangular outlet box 5, and the flow field of the oil gas and catalyst directly changes from vertical upward to horizontal outward. During this sudden change of flow field, the catalyst will rush to the top plate in the outlet direction and break. Figure 2-Figure 6 As shown, the internal riser terminal outlet structure provided by the utility model comprises an internal riser barrel 1, an internal riser head 2, and a right cone outlet square box 3. The right cone outlet square box has an obtuse angle between the cone wall and the outer wall of the internal riser barrel, the internal riser head 2 is fixedly connected to the top of the internal riser barrel 1, and the right cone outlet square box 3 is connected to the coarse cyclone separator 4. Figure 3 , Figure 5 The central cone outlet square box 3 is radially arranged outside the top side of the inner riser barrel 1; Figure 4 , Figure 6 The central cone outlet square box 3 is tangentially arranged outside the top side of the inner riser tube body 1. All surfaces contacting the gas-solid medium are provided with wear-resistant linings and wear-resistant lining anchors, and the lining anchors are tortoise shell mesh and variable angle anchor plates.

[0022] Oil, gas and catalyst enter through the bottom of the inner lifting tube body 1, are lifted to the top of the inner lifting tube body 1, and are rectified by the inclined gradually expanding flow channel formed by the positive cone outlet square box 3, and then gently enter the coarse cyclone separator 4.

[0023] The above is only a typical example of the utility model, and does not impose any formal limitation on the utility model. Any technician familiar with the field, without departing from the scope of the technical solution of the utility model, shall be regarded as an equivalent example of equivalent changes made by using the above technical content. Any equivalent changes made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model shall fall within the scope of the technical solution of the utility model.

Claims

1. An inner riser terminal outlet structure, characterized in that: It includes an inner riser tube body, an inner riser tube head and a regular cone outlet square box; the inner riser tube head is fixedly connected to the top of the inner riser tube body; the regular cone outlet square box is radially arranged outside the top side of the inner riser tube body.

2. An inner riser terminal outlet structure, characterized in that: It includes an inner riser tube body, an inner riser tube head and a regular cone outlet square box; the inner riser tube head is fixedly connected to the top of the inner riser tube body; the regular cone outlet square box is tangentially arranged outside the top side of the inner riser tube body.

3. The inner riser terminal outlet structure according to claim 1 or claim 2, characterized in that: The angle between the cone wall of the regular cone outlet square box and the outer wall of the inner lifting cylinder is an obtuse angle.

4. The inner riser terminal outlet structure according to claim 1 or claim 2, characterized in that: All surfaces in contact with gas-solid media are provided with wear-resistant linings and wear-resistant lining anchors.

5. The inner riser terminal outlet structure according to claim 4, characterized in that: The wear-resistant lining anchors are tortoise shell mesh and variable angle anchor plates.

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