Combined riser fluidized bed reactor

Abstract

The utility model discloses a combined riser fluidized bed reactor which comprises a combined pipe structure, the combined pipe structure is composed of a lower end pipe, an upper end pipe and a plurality of connecting pipes, the lower end pipe, the connecting pipes and the upper end pipe are connected through flanges, and catalysts are placed in the lower end pipe, the connecting pipes and the upper end pipe. The outer walls of the two sides of the lower end pipe, the upper end pipe and the connecting pipe are fixedly connected with connecting buckles, hanging rings are clamped to the connecting buckles, the bottom end of the lower end pipe is fixedly connected with an air inlet pipe, the top end of the upper end pipe is fixedly connected with an air outlet pipe, and a catalyst inlet is formed in one side, above the lower end pipe, of the connecting pipe. A catalyst outlet is formed in one side of the connecting pipe below the upper end pipe, and thermocouples are inserted into the plurality of connecting pipes. According to the utility model, the lower end pipe, the plurality of connecting pipes and the upper end pipe are combined, so that the damaged part of the reactor can be conveniently replaced, and the use of the fluidized bed reactor is improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical reaction engineering technology, and in particular to a combined riser fluidized bed reactor. Background Technology

[0002] Currently, riser fluidized bed reactors are mainly used in the petroleum refining industry, primarily in the process of catalytic cracking to produce light oil products.

[0003] In existing riser fluidized bed reactors, the riser pipe is a complete unit, making it difficult to replace when partially damaged, which affects the use of the reactor. Therefore, in order to advance industry technology, better realize the functionality of riser fluidized bed reactors, and improve core technological competitiveness, this application proposes a new implementation scheme that differs from the external pipe structure and application method of riser fluidized bed reactors in the prior art. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in existing riser fluidized bed reactors, the riser is a complete unit, which makes it inconvenient to replace when it is partially damaged. Therefore, a combined riser fluidized bed reactor is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A combined riser fluidized bed reactor includes a combined pipe structure, which consists of a lower pipe, an upper pipe, and multiple connecting pipes. The lower pipe, connecting pipes, and upper pipe are connected by flanges. A catalyst is placed inside the lower pipe, connecting pipe, and upper pipe. Connecting buckles are fixedly connected to the outer walls of both sides of the lower pipe, upper pipe, and connecting pipe, and lifting rings are snapped onto the connecting buckles. An air inlet pipe is fixedly connected to the bottom of the lower pipe, and an air outlet pipe is fixedly connected to the top of the upper pipe. A catalyst inlet is provided on one side of the connecting pipe above the lower pipe, and a catalyst outlet is provided on one side of the connecting pipe below the upper pipe. Thermocouples are inserted into the multiple connecting pipes. A bubble cap is fixedly connected inside the lower pipe, and an umbrella-shaped baffle is fixedly connected inside the upper pipe.

[0007] Furthermore, a catalyst discharge pipe is fixedly connected to one side of the lower end pipe, and a hydrogen scrubbing pipe is fixedly connected to one side of the catalyst discharge pipe.

[0008] Furthermore, a sampling tube is fixedly connected to one side of each of the plurality of connecting tubes.

[0009] Furthermore, an exhaust port is provided at the bottom of the air intake pipe.

[0010] Furthermore, one of the lower connecting pipes and one of the upper connecting pipes are fixedly connected to one side of an inlet pipe, and one end of the inlet pipe is fixedly connected to a sealing cap.

[0011] Furthermore, a vent pipe is fixedly connected to one side of the upper tube, and a differential pressure gauge is inserted into the top of the upper tube.

[0012] Furthermore, a support base is fixedly connected to the bottom of the lower tube.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The combination of a lower end pipe, multiple connecting pipes, and an upper end pipe facilitates the replacement of damaged parts of the reactor, thereby improving the usability of the tubular fluidized bed reactor.

[0015] 2. The bubble cap disperses the rising gas into small streams, avoiding local gas short-circuiting (channeling) or concentrated injection, ensuring uniform gas distribution across the cross-section, and providing a basis for stable boiling of the catalyst particles. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a combined riser fluidized bed reactor proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the combined tube structure of a combined riser fluidized bed reactor in the explosive separation state, as proposed in this utility model.

[0018] Figure 3 This is an enlarged schematic diagram of the connecting pipe structure of a combined riser fluidized bed reactor proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the lower cross-sectional main structure of a combined riser fluidized bed reactor proposed in this utility model.

[0020] Figure 5 This is a schematic diagram of the upper cross-sectional main structure of a combined riser fluidized bed reactor proposed in this utility model.

[0021] In the diagram: 1. Combined pipe structure; 101. Lower end pipe; 102. Upper end pipe; 103. Connecting pipe; 2. Connecting buckle; 3. Lifting ring; 4. Inlet pipe; 5. Outlet pipe; 6. Catalyst inlet; 7. Catalyst outlet; 8. Catalyst unloading pipe; 9. Sampling pipe; 10. Thermocouple; 11. Hydrogen scrubbing pipe; 12. Discharge port; 13. Bubble cap; 14. Inlet pipe; 15. Sealing cap; 16. Umbrella-shaped baffle; 17. Vent pipe; 18. Differential pressure gauge; 19. Support base; 20. Catalyst. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-5 A combined riser fluidized bed reactor includes a combined pipe structure 1, which consists of a lower end pipe 101, an upper end pipe 102, and multiple connecting pipes 103. The lower end pipe 101, connecting pipes 103, and upper end pipe 102 are connected by flanges. A catalyst 20 is placed inside the lower end pipe 101, connecting pipes 103, and upper end pipe 102. Connecting buckles 2 are welded to the outer walls on both sides of the lower end pipe 101, upper end pipe 102, and connecting pipe 103. Lifting rings 3 are snapped onto the connecting buckles 2. One end of a connecting rope is connected to the lifting ring 3, and the other end of the connecting rope is connected to a lifting device. Thus, the lower end pipe 101, multiple connecting pipes 103, and upper end pipe 102 are lifted and assembled sequentially by the lifting device.

[0024] An inlet pipe 4 is welded to the bottom of the lower pipe 101, and an outlet pipe 5 is welded to the top of the upper pipe 102. A catalyst inlet 6 is provided on one side of the connecting pipe 103 above the lower pipe 101. Solid powdered catalyst 20 is loaded into the combined pipe structure 1 through the catalyst inlet 6. A catalyst outlet 7 is provided on one side of the connecting pipe 103 below the upper pipe 102. A portion of the catalyst 20 is discharged from the catalyst outlet 7. Thermocouples 10 are inserted into multiple connecting pipes 103 and are arranged at different heights of the reactor. The temperature of the bed is collected in real time (e.g., bottom, middle, top). A bubble cap 13 is fixed inside the lower tube 101 by bolts. The bubble cap 13 disperses the rising gas into small streams, preventing localized gas short-circuiting (channeling) or concentrated jetting, ensuring uniform gas distribution across the cross-section, and providing a basis for stable boiling of the catalyst particles. An umbrella-shaped baffle 16 is fixed inside the upper tube 102 by bolts. In high-velocity riser tubes, gas easily forms large bubbles (especially in the upper part of the bed), leading to a decrease in gas-solid contact efficiency. The umbrella-shaped baffle 16 can cut the rising bubbles, breaking them into smaller bubbles, increasing the gas-solid contact area, and improving mass and heat transfer efficiency.

[0025] A catalyst discharge pipe 8 is welded to one side of the lower end pipe 101, which facilitates the discharge of deactivated catalyst 20 and controls the amount of catalyst in the reactor through the catalyst discharge pipe 8. A hydrogen scrubbing pipe 11 is welded to one side of the catalyst discharge pipe 8. Hydrogen usually enters the reactor as a reaction raw material or protective gas. Before entering the reactor, the hydrogen can be washed through the hydrogen scrubbing pipe 11 to remove any impurities it may contain, such as dust, sulfur, and chlorine. Sampling pipes 9 are welded to one side of multiple connecting pipes 103. During reactor operation, samples of the reactants are collected periodically or irregularly. The bottom of the inlet pipe 4 is equipped with an outlet 12. One of the lower connecting pipes 103 and two of the upper connecting pipes 103 are welded to one side with inlet pipes 14. One end of the inlet pipe 14 is fixed with a sealing cap 15 by bolts. After opening the sealing cap 15, the staff can enter the reactor through the inlet pipe 14 for inspection and maintenance. A vent pipe 17 is welded to one side of the upper pipe 102. A differential pressure gauge 18 is inserted into the top of the upper pipe 102. The bottom of the lower pipe 101 is fixed with a support base 19 by bolts.

[0026] The working principle of this embodiment is as follows: In use, firstly, one end of the connecting rope is connected to the lifting ring 3, and then the other end of the connecting rope is connected to the lifting equipment. The lower end pipe 101, multiple connecting pipes 103 and the upper end pipe 102 are then hoisted and assembled in sequence by the lifting equipment. After assembly, the gaseous material is input into the lower end pipe 101 from the inlet pipe 4. Then, the gaseous material passes through the bubble cap 13 and is evenly distributed in the connecting pipe 103. Under the conveying of the gaseous material, the fixed powdered catalyst 20 is made to boil, thereby promoting the bottom catalyst particles to fluidize first and gradually transmit the fluidization effect upward to form a stable gas-solid fluidized bed. The bed temperature at different heights in the reactor is monitored by multiple thermocouples 10. Then, the gaseous material undergoes a chemical reaction on the surface of the boiling catalyst 20. The gaseous material after the reaction is discharged from the outlet pipe 5.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A combined riser fluidized bed reactor, comprising a combined tube structure (1), characterized in that, The combined pipe structure (1) consists of a lower end pipe (101), an upper end pipe (102), and multiple connecting pipes (103). The lower end pipe (101), connecting pipes (103), and upper end pipe (102) are connected by flanges. A catalyst (20) is placed inside the lower end pipe (101), connecting pipe (103), and upper end pipe (102). Connecting buckles (2) are fixedly connected to the outer walls on both sides of the lower end pipe (101), upper end pipe (102), and connecting pipe (103). A lifting ring (3) is snapped onto the connecting buckle (2). An air inlet pipe (4) is fixedly connected to the bottom end of the end pipe (101), an air outlet pipe (5) is fixedly connected to the top end of the upper end pipe (102), a catalyst inlet (6) is provided on one side of the connecting pipe (103) above the lower end pipe (101), a catalyst outlet (7) is provided on one side of the connecting pipe (103) below the upper end pipe (102), thermocouples (10) are inserted into multiple connecting pipes (103), a bubble cap (13) is fixedly connected inside the lower end pipe (101), and an umbrella-shaped baffle (16) is fixedly connected inside the upper end pipe (102).

2. The combined riser fluidized bed reactor according to claim 1, characterized in that, A catalyst discharge pipe (8) is fixedly connected to one side of the lower end pipe (101), and a hydrogen scrubbing pipe (11) is fixedly connected to one side of the catalyst discharge pipe (8).

3. The combined riser fluidized bed reactor according to claim 1, characterized in that, A sampling tube (9) is fixedly connected to one side of each of the multiple connecting tubes (103).

4. A combined riser fluidized bed reactor according to claim 1, characterized in that, The bottom of the air intake pipe (4) is provided with an exhaust port (12).

5. A combined riser fluidized bed reactor according to claim 1, characterized in that, One of the lower connecting pipes (103) and one of the upper connecting pipes (103) are fixedly connected to one side of an inlet pipe (14), and one end of the inlet pipe (14) is fixedly connected to a sealing cap (15).

6. A combined riser fluidized bed reactor according to claim 1, characterized in that, A vent pipe (17) is fixedly connected to one side of the upper end pipe (102), and a differential pressure gauge (18) is inserted into the top of the upper end pipe (102).

7. A combined riser fluidized bed reactor according to claim 1, characterized in that, The bottom of the lower end tube (101) is fixedly connected to a support base (19).

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