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, a sprue spreader and a partial cone body outlet square box, the inner lifting pipe end socket is fixedly connected to the top of the inner lifting pipe barrel; the sprue spreader is fixedly connected into the top side of the inner lifting pipe barrel; and the partial cone outlet square box is radially or tangentially arranged outside the top side of the inner lifting pipe barrel. The inner lifting pipe is simple, reliable and economical in structure, oil gas and a catalyst are rectified through an inclined divergent flow channel formed by the inner lifting pipe barrel, the inner lifting pipe top spure spreader and the partial cone body outlet square box and then enter the coarse cyclone separator slowly, a medium flow field is greatly optimized and relieved, and the separation efficiency is improved. The situation that too much catalyst fine powder is formed due to beating and breaking of the catalyst in the sudden change of the flow field of the flow channel is avoided, the possibility is provided for reducing the solid content in the oil slurry, and then 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, a flow dividing cone and a partial cone outlet square box; the inner riser head is fixedly connected to the top of the inner riser barrel; the flow dividing cone is fixedly connected to the inside of the top side of the inner riser barrel; the partial cone outlet square box is radially arranged on the outside of 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, a diverter cone and a partial cone outlet square box; the inner riser head is fixedly connected to the top of the inner riser barrel; the diverter cone is fixedly connected to the inside of the top side of the inner riser barrel; the partial cone outlet square box is tangentially arranged on the outside of the top side of the inner riser barrel.

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

[0007] Preferably, the diverter cone can be a cone, a frustum, or a convex head, with a cone being preferred.

[0008] In the utility model, all surfaces contacting gas-solid medium are provided with wear-resistant linings and wear-resistant lining anchoring pieces.

[0009] Preferably, the wear-resistant lining anchor is a tortoise shell mesh or a variable angle anchor plate.

[0010] 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 eccentric cone outlet square box is connected to the inlet of the rough cyclone separator.

[0011] The utility model has the following beneficial effects:

[0012] 1) The oil, gas and catalyst enter the coarse cyclone separator after being rectified by the inclined gradually expanding flow channel formed by the inner riser barrel, the internal riser top diversion cone and the offset cone outlet square box, which greatly optimizes and eases the medium flow field, avoids the catalyst from being broken and forming too much catalyst fine powder due to sudden changes in the flow field of 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.

[0013] 2) The terminal outlet structure of the internal riser is simple, reliable and economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the terminal outlet structure of the prior art riser;

[0015] Figure 2 It is a schematic diagram of the connection between the utility model and the coarse cyclone separator;

[0016] Figure 3 It is a structural schematic diagram of the utility model when the eccentric cone outlet square box is radially arranged;

[0017] Figure 4 It is a structural schematic diagram of the utility model when the eccentric cone outlet square box is tangentially arranged;

[0018] Figure 5 It is a top view schematic diagram of the utility model connected with the coarse cyclone separator when the eccentric cone outlet square box is radially arranged;

[0019] Figure 6 It is a top view schematic diagram of the utility model being connected to a coarse cyclone separator when the eccentric cone outlet square box is tangentially arranged;

[0020] In the figure: 1-inner riser barrel, 2-inner riser head, 3-dividing cone, 4-eccentric cone outlet square box, 5-coarse cyclone separator, 6-rectangular outlet square box. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings.

[0022] Existing technologies such as Figure 1 As shown, in the catalytic device, the oil gas and catalyst directly enter the coarse cyclone separator 5 through the inner riser tube 1 and the rectangular outlet box 6, 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 6As shown, the internal riser terminal outlet structure provided by the utility model comprises an internal riser barrel 1, an internal riser head 2, a flow dividing cone 3, and an eccentric cone outlet square box 4. The angle between the eccentric side of the eccentric cone outlet square box and the outer wall of the internal riser barrel is an obtuse angle, the internal riser head 2 is fixedly connected to the top of the internal riser barrel 1, the flow dividing cone 3 is fixedly connected to the inside of the top side of the internal riser barrel 1, and the eccentric cone outlet square box 4 is connected to the coarse cyclone separator 5. Figure 3 , Figure 5 The middle-eccentric cone outlet square box 4 is radially arranged outside the top side of the inner riser barrel 1; Figure 4 , Figure 6 The middle offset cone outlet square box 4 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.

[0023] Oil, gas and catalyst enter through the bottom of the inner riser barrel 1, are lifted to the top of the inner riser barrel 1, and are rectified by the inclined gradually expanding flow channel formed by the splitter cone 3 and the offset cone outlet square box 4, and then gently enter the coarse cyclone separator 5.

[0024] 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, a diverter cone and a partial cone outlet square box; the inner riser tube head is fixedly connected to the top of the inner riser tube body; the diverter cone is fixedly connected to the inside of the top side of the inner riser tube body; the partial 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, a diverter cone and a partial cone outlet square box; the inner riser tube head is fixedly connected to the top of the inner riser tube body; the diverter cone is fixedly connected to the inside of the top side of the inner riser tube body; the partial cone outlet square box is tangentially arranged on the outside of 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 eccentric side of the eccentric cone outlet 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: The splitter cone is a cone structure, a truncated cone structure or a convex head structure.

5. 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.

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

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