A novel fluidized bed reactor for organosilicon

Abstract

The application discloses a novel organic silicon fluidized bed reactor which comprises an upper head, an enlarged end cylinder, an enlarged end cone, a straight cylinder and a lower head arranged in sequence from top to bottom. A U-shaped heat exchange tube bundle is arranged in the bed body, the tube bundle is distributed in a radial direction, a support plate is arranged on the upper portion of the tube bundle and is fixed on a bed inner wall support. Removable flanges are arranged at the two ends of the straight cylinder. The application can improve the fluidization quality in the fluidized bed and reduce the difficulty of the fluidized bed maintenance.

Description

Technical Field

[0001] This utility model relates to the field of organosilicon fluidized beds, and in particular to a novel organosilicon fluidized bed reactor. Background Technology

[0002] In the production of organosilicon monomers, the fluidized bed reactor is a core piece of equipment, and the effective operation of its internal heat exchanger tube bundles has a significant impact on the monomer synthesis reaction. Common heat exchanger tube bundles in China include finger-shaped and U-shaped bundles, and the method of fixing the tube bundles directly affects the safety and service life of the equipment. Early fluidized bed heat exchanger tube bundles were fixed by direct welding. A lifting frame was welded to the upper part of the reactor shell, and one end of a lifting rod was welded to the lifting frame, while the other end was directly welded to the heat exchanger tube bundle. This method is prone to structural misalignment due to uneven operation during welding, and more importantly, thermal expansion and contraction can cause serious problems. Furthermore, the common method for cleaning and maintenance of fluidized bed reactors is to use winches to lift the fluidized bed tube bundles for cleaning. This method not only places requirements on the equipment frame structure but also requires significant manpower and material resources. Therefore, a rational design of the fluidized bed reactor structure is of great significance for simplifying maintenance and improving reactor production efficiency. Summary of the Invention

[0003] The main purpose of this invention is to provide a novel organosilicon fluidized bed reactor that can improve the fluidization quality of the fluidized bed and reduce the difficulty of fluidized bed maintenance.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a novel organosilicon fluidized bed reactor, comprising an upper head, an enlarged end cylinder, an enlarged end cone, a straight cylinder, and a lower head. The upper head is flangedly connected to the enlarged end cylinder, the enlarged end cylinder is welded to the enlarged end cone, the enlarged end cone is flangedly connected to the straight cylinder, and the straight cylinder is flangedly connected to the lower head. A U-shaped heat exchange tube bundle is installed inside the reactor, and the U-shaped heat exchange tube bundle is fixed by a support plate, which is fixed to an inner wall support.

[0005] In the optimized scheme, the U-shaped heat exchange tube bundles are arranged longitudinally to form multiple U-shaped heat exchange tube bundles; the support plates are arranged laterally to form a grid structure, the grid structure of which matches the diameter of the U-shaped tubes and is used to support the U-shaped heat exchange tube bundles.

[0006] In the optimized scheme, the support plate is fixed to the lower side of the top bend of all U-shaped heat exchange tube bundles; the lower part of the bend of the U-shaped heat exchange tube bundle is thickened with wear-resistant parts.

[0007] In the optimized scheme, each U-shaped heat exchange tube in the U-shaped heat exchange tube bundle is provided with an oil inlet and an oil outlet, and high-temperature resistant valves are installed at the oil inlet and oil outlet.

[0008] In the optimized design, the inner wall supports are made of steel plates, with a total of 8-16 supports, which are evenly arranged on the inner wall of the upper side of the enlarged end cone.

[0009] In the optimized design, the straight cylindrical body uses FM neck flanges on both sides, with the flanges located on both sides of the straight cylindrical body.

[0010] In the optimized scheme, the inner diameter of the enlarged end cylinder is 1.2-1.5 times the inner diameter between the straight cylinders; the horizontal angle between the enlarged end cone and the enlarged end cylinder is 45-70°.

[0011] The novel organosilicon fluidized bed reactor provided by this invention, by adopting the above-described structure, has the following beneficial effects: (1) Compared with the traditional fluidized bed fixed by the hoisting frame, the arrangement of the fluidized bed tube bundle can be simplified by the support plate, and the maintenance space above the heat exchange tube bundle can be increased.

[0012] (2) The inlet and outlet branch valves of the fluidized bed heat exchange tube bundle can adjust the flow rate of the heat transfer oil entering the bed, making the fluidized bed heat exchange more stable.

[0013] (3) When the fluidized bed is being repaired, the flanges at both ends of the fluidized bed cylinder can be disassembled from bottom to top to clean the fluidized bed, reducing the risk of lifting and cleaning the fluidized bed. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] In the diagram: 1. Upper end cap; 2. Enlarged end cylinder; 3. Enlarged end cone; 4. Straight cylinder; 5. Lower end cap; 6. Inner wall support; 7. Support plate; 8. Oil inlet; 9. Oil outlet; 10. Wear-resistant parts.

[0016] Figure 2 This is a distribution diagram of the U-shaped heat exchange tube bundle 11 and a schematic diagram of the support plate connection of this utility model.

[0017] Figure 3 This is a schematic diagram of the internal support of this utility model. Detailed Implementation

[0018] As shown in the figure, a novel organosilicon fluidized bed reactor includes an upper head 1, an enlarged end cylinder 2, an enlarged end cone 3, a straight cylinder 4, and a lower head 5. The upper head 1 is flangedly connected to the enlarged end cylinder 2, the enlarged end cylinder 2 is welded to the enlarged end cone 3, the enlarged end cone 3 is flangedly connected to the straight cylinder 4, and the straight cylinder 4 is flangedly connected to the lower head 5. A U-shaped heat exchange tube bundle 11 is installed inside the reactor. The U-shaped heat exchange tube bundle 11 is fixed by a support plate 7, which is fixed to an inner wall support 6.

[0019] In the optimized scheme, the U-shaped heat exchange tube bundles 11 are arranged longitudinally to form multiple U-shaped heat exchange tube bundles; the support plates 7 are arranged laterally to form a grid structure, the grid structure matching the diameter of the U-shaped tubes, to support the U-shaped heat exchange tube bundles 11. Distributing the U-shaped heat exchange tube bundles 11 longitudinally and laterally with the support plates 7 reduces the longitudinal stress of the U-shaped heat exchange tube bundles, increases the porosity of the support plates, and is beneficial for the fluidization of powder materials within the fluidized bed reactor.

[0020] In the optimized scheme, the support plate 7 is fixed to the lower side of the top bend of all U-shaped heat exchange tube bundles; the lower part of the bend of the U-shaped heat exchange tube bundle 11 is thickened with wear-resistant parts 10. Welding thickened steel plates and wear-resistant parts 10 to the lower part of the U-shaped bend and placing them on the support plate 7 can reduce the wear between the fluidized bed tube bundle and the support plate during production.

[0021] In the optimized scheme, each U-shaped heat exchange tube in the U-shaped heat exchange tube bundle is equipped with an oil inlet 8 and an oil outlet 9, and high-temperature resistant valves are installed at the oil inlet and outlet. The flow rate of each heat exchange medium entering the fluidized bed is controlled by the valves to ensure consistent heat exchange efficiency across all channels within the fluidized bed during production. This prevents uneven temperature distribution within the fluidized bed, which could lead to localized overheating and powder accumulation, affecting the fluidization state within the fluidized bed.

[0022] In the optimized scheme, the inner wall support 6 is made of steel plate, with a total of 8-16 supports, which are evenly arranged on the inner wall of the upper side of the enlarged end cone 3. The use of multiple inner wall supports can effectively support the heat exchange tube bundle. The support plate is welded to the connection of the inner support to prevent the heat exchange tube bundle from shifting due to stress.

[0023] In the optimized design, the straight cylinder 4 is fitted with FM neck flanges on both sides, with the flanges positioned on both sides of the straight cylinder. This flange connection allows the lower head 5, straight cylinder 4, and upper head 1 to be disassembled sequentially during fluidized bed maintenance and cleaning. The heat exchange tube bundle can then be cleaned from inside the enlarged end cylinder 2 and below the enlarged end cone 3, avoiding the need for cleaning the fluidized bed tube bundle by lifting it.

[0024] In the optimized design, the inner diameter of the enlarged end cylinder 2 is 1.2-1.5 times the inner diameter of the straight cylinder 4; the horizontal angle between the enlarged end cone 3 and the enlarged end cylinder 2 is 45-70°. This facilitates the formation of a circulation path for the powder in the fluidized bed reactor as it passes through the straight cylinder and enters the enlarged end cone and cylinder, influenced by changes in gas velocity and the powder's own gravity, thus promoting monomer synthesis reactions.

[0025] By adopting the above structure, compared with the traditional fluidized bed heat exchanger tube bundle hoisting frame, the support plate simplifies the arrangement of the fluidized bed tube bundle and increases the maintenance space above the heat exchanger tube bundle. The inlet and outlet branch valves of the fluidized bed heat exchanger tube bundle can regulate the flow rate of the heat transfer oil entering the bed, making the fluidized bed heat exchange more stable. During fluidized bed maintenance, the flanges at both ends of the fluidized bed cylinder can be disassembled from bottom to top to clean the heat exchanger tube bundle, reducing the risks associated with lifting and cleaning the fluidized bed.

Claims

1. An organosilicon fluidized bed reactor, comprising an upper head (1), an enlarged end cylinder (2), an enlarged end cone (3), a straight cylinder (4), and a lower head (5), characterized in that: The upper end cap (1) is connected to the flange of the enlarged end cylinder (2), the enlarged end cylinder (2) is welded to the enlarged end cone (3), the enlarged end cone (3) is connected to the flange of the straight cylinder (4), and the straight cylinder (4) is connected to the flange of the lower end cap (5); the reactor is equipped with a U-shaped heat exchange tube bundle (11), the U-shaped heat exchange tube bundle (11) is fixed by a support plate (7), and the support plate (7) is fixed on the inner wall support (6).

2. The organosilicon fluidized bed reactor according to claim 1, characterized in that: The U-shaped heat exchange tube bundle (11) is arranged longitudinally to form multiple U-shaped heat exchange tube bundles; the support plate (7) is arranged laterally to form a grid structure, the grid structure of which matches the diameter of the U-shaped tubes and is used to support the U-shaped heat exchange tube bundle (11).

3. The organosilicon fluidized bed reactor according to claim 2, characterized in that: The support plate (7) is fixed to the lower side of the top bend of all U-shaped heat exchange tube bundles; the lower side of the bend of the U-shaped heat exchange tube bundle (11) is thickened with wear-resistant parts (10).

4. The organosilicon fluidized bed reactor according to claim 2, characterized in that: Each U-shaped heat exchange tube in the U-shaped heat exchange tube bundle (11) is provided with an oil inlet (8) and an oil outlet (9), and high-temperature resistant valves are installed at the oil inlet (8) and the oil outlet (9).

5. The organosilicon fluidized bed reactor according to claim 1, characterized in that: The inner wall support (6) is made of steel plate, with a total of 8-16 pieces, which are evenly arranged on the inner wall of the upper side of the enlarged end cone (3).

6. The organosilicon fluidized bed reactor according to claim 1, characterized in that: The straight cylindrical body (4) is equipped with FM neck flanges on both sides, and the flanges are set on both sides of the straight cylindrical body.

7. The organosilicon fluidized bed reactor according to claim 1, characterized in that: The inner diameter of the enlarged end cylinder (2) is 1.2-1.5 times the inner diameter between the straight cylinder (4); the horizontal angle between the enlarged end cone (3) and the enlarged end cylinder (2) is 45-70°.

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