A bubble breaking device for a silane fluidized bed reactor

Abstract

The utility model discloses a bubble breaking device for silane fluidized bed reactor, including at least two fixed tubes, preset shape mechanism, wherein, every fixed tube is connected with the preset shape mechanism of horizontal arrangement, the preset shape mechanism includes connecting plate, clamp plate and at least two round holes, and the outside wall of every round hole is connected with at least two clamp plates, and the relative clamp plate between every two round holes is connected through the connecting plate.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and in particular to a bubble breaking device for a silane fluidized bed reactor. Background Technology

[0002] The surging phenomenon occurs when bubbles in a chemical bed coalesce and grow to a size comparable to the diameter of the bed, causing the bed to be divided into several segments with alternating large bubbles and particle layers. After the bed rises to a certain height, it collapses.

[0003] In the process of realizing this utility model, it was discovered that existing technologies involving the production of granular silicon using silane fluidized bed reactors have simple production processes, high conversion rates, and high automation, and can be continuously produced, which is conducive to the large-scale production of granular silicon.

[0004] In a gas-solid two-phase reactor, gas flows through the bed at a high velocity via a gas distributor at the bottom of the reactor, keeping the solid particles in a fluidized state and allowing them to undergo decomposition reactions. However, due to the large density difference between the gas and solid phases and the large height-to-diameter ratio of the bed, the fluidizing gas generates bubbles at the distributor outlet and during its ascent through the bed. These bubbles continuously coalesce and grow until they are comparable to the reactor diameter, causing surging problems. This results in friction between the bed and the reactor wall, and bed fluctuations lead to the loss of some particles, altering the particle size distribution of the bed and affecting the long-term stable operation of the fluidized bed reactor.

[0005] Furthermore, as the fluidizing gas passes through the gas distributor outlet and rises through the bed, bubbles are generated and continue to grow until they are comparable to the diameter of the reactor, resulting in surging and particle loss. The surging also causes disordered particle size distribution, affecting gas-solid contact efficiency. Abnormal process parameters become a key factor limiting production increase and stable operation. Utility Model Content

[0006] In view of this, the present invention provides a bubble breaking device for a silane fluidized bed reactor, which can be installed in the chamber of the silane fluidized bed reactor to break up continuously accumulating and growing bubbles, thereby preventing surging from affecting the stable operation of the reactor.

[0007] To achieve the above objectives, an embodiment of the present invention provides a bubble breaking device for a silane fluidized bed reactor, comprising at least two fixed pipes and a preset shape mechanism; wherein each fixed pipe is connected to the horizontally arranged preset shape mechanism; the preset shape mechanism includes a connecting plate, a clamping plate and at least two circular holes, at least two clamping plates are connected to the outer wall of each circular hole, and the relative clamping plates between each pair of circular holes are connected by the connecting plate.

[0008] Optionally, the connecting plate and the clamping plate are connected by bolt holes.

[0009] Optionally, there are three circular holes and three fixed pipes; wherein, the three fixed pipes are respectively the pressure tapping pipe of the silane fluidized bed reactor, the temperature measuring pipe of the silane fluidized bed reactor, and the feed pipe of the silane fluidized bed reactor;

[0010] The three circular holes are respectively connected to the pressure tapping pipe of the silane fluidized bed reactor, the temperature measuring pipe of the silane fluidized bed reactor, and the feed pipe of the silane fluidized bed reactor.

[0011] Optionally, it includes: the bottom ends of two of the three fixed tubes are inserted below the bed layer at different depths, and the bottom end of the other fixed tube is placed above the bed layer.

[0012] Optionally, this includes inserting the bottom end of the fixing tube 80cm-120cm below the bed.

[0013] Optionally, it includes: three fixing tubes connected to three circular holes by bolts.

[0014] Optionally, it includes: three fixed pipes each having a top end cap, and the upper part of the top end cap is connected to the body short pipe flange of the top end cap by flange bolts.

[0015] Optionally, the outer surfaces of the fixing tube and the preset shape mechanism are respectively coated with a protective coating.

[0016] Optionally, it includes: a preset shape mechanism installed 10cm-30cm above the bed surface.

[0017] Optionally, it includes: a preset shape mechanism in the shape of a triangle, with the included angle between two adjacent circular holes being 65 degrees to 75 degrees, and the included angle between the inclined connecting plate in the triangle and the horizontal direction being 20 degrees to 22 degrees.

[0018] One embodiment of the above-mentioned utility model has the following advantages or beneficial effects: The present utility model provides a bubble breaking device for a silane fluidized bed reactor, which can be installed in the chamber of the silane fluidized bed reactor and break bubbles that have not yet emerged from the bed surface by inserting a fixed tube into the bed layer at the bottom; furthermore, the present utility model increases the contact area with the bubbles and uses the fixed tube and the preset shape mechanism to break large bubbles that have escaped from the bed surface, thereby reducing the bed fluctuations caused by the breaking of large bubbles that disrupt the particle size distribution.

[0019] The further effects of the aforementioned unconventional alternative methods will be explained below in conjunction with specific implementation methods. Attached Figure Description

[0020] The accompanying drawings are provided to better understand this utility model and do not constitute an undue limitation thereof. Wherein:

[0021] Figure 1This is a schematic diagram of the structure of a bubble breaking device for a silane fluidized bed reactor according to an embodiment of the present invention. Detailed Implementation

[0022] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the present invention, including various details to aid understanding. These embodiments should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0023] This invention addresses the surging problem in silane fluidized bed reactors caused by bubbles coalescing and growing to a diameter comparable to that of the reactor itself. This avoids increased friction between the bed and wall, leading to particle loss and disruption of the particle size distribution. It also prevents bubbles from reducing gas-solid contact efficiency and affecting the long-term stable operation of the silane fluidized bed reactor. Specifically, at least one embodiment of this invention provides a bubble breaking device for silane fluidized bed reactors, such as... Figure 1 As shown, the bubble breaking device for the silane fluidized bed reactor may include at least two fixed pipes 1 and a preset shape mechanism. In an embodiment, each fixed pipe 1 is connected to a horizontally arranged preset shape mechanism. The preset shape mechanism includes a connecting plate 2, a clamping plate 4, and at least two circular holes 3. At least two clamping plates 4 are connected to the outer wall of each circular hole 3, and the opposing clamping plates 4 between every two circular holes 3 are connected by the connecting plate 2.

[0024] In some preferred embodiments, the material of the pre-formed mechanism is a high-performance nickel-based alloy containing 20-23% chromium, 8-10% molybdenum, 5% iron, 3-4% tungsten, and trace amounts of carbon, silicon, manganese, etc., which is suitable for wear-resistant and high-temperature environments.

[0025] In some preferred embodiments, the connecting plate 2 and the clamping plate 4 are connected by bolt holes.

[0026] It is worth noting that the outer surface of the pre-shaped mechanism is coated with a protective coating to isolate the metal from contact with the normal granular silicon product, preventing the introduction of metal impurities into the normal product and ensuring that the normal product is not contaminated by metal impurities. Preferably, the protective coating may include Stellite alloy, nickel-chromium alloy, high-purity silicon, high-purity silicon carbide, silicon nitride, cobalt-based alloy, nickel-based alloy, or tungsten carbide-based cemented carbide.

[0027] In addition, the outer surface of the fixing tube 1 is coated with a protective coating to isolate the metal from contact with the normal granular silicon product, preventing the introduction of metal impurities into the normal product and ensuring that the normal product is not contaminated by metal impurities. Preferably, the protective coating may include Stellite alloy, nickel-chromium alloy, high-purity silicon, high-purity silicon carbide, silicon nitride, cobalt-based alloy, nickel-based alloy, or tungsten carbide-based cemented carbide.

[0028] As some other embodiments of this utility model, the preset shape mechanism described in this utility model can be different shapes such as triangle, rhombus, rectangle, etc., without limitation. Different shapes can be set according to the installation position in the reactor and the different requirements for the effect of breaking bubbles and preventing bubble aggregation (i.e., different requirements for the effect of reducing surging).

[0029] It is worth noting that the shape of the preset shape mechanism can be changed by reducing or increasing the number of fixing tube 1, connecting plate 2, clamping plate 4, and circular hole 3.

[0030] In some embodiments, such as Figure 1 As shown, the bubble breaking device for the silane fluidized bed reactor includes three circular holes 3 and three fixed pipes 1. The three fixed pipes 1 are respectively the pressure tapping pipe, temperature measuring pipe, and feed pipe of the silane fluidized bed reactor. The three circular holes 3 are connected to the pressure tapping pipe, temperature measuring pipe, and feed pipe of the silane fluidized bed reactor, respectively. Each fixed pipe 1 passes through a circular hole 3 for connection. Preferably, the three fixed pipes 1 are connected to the three circular holes 3 by bolts.

[0031] As some preferred embodiments, such as Figure 1 As shown, three fixed tubes 1 are vertically downwards, and a pre-shaped mechanism is horizontally installed, forming a triangle and perpendicular to the three fixed tubes 1. The included angle between two adjacent circular holes is 65-75 degrees, and the angle between the inclined connecting plate in the triangle and the horizontal direction is 20-22 degrees. Preferably, the included angle between two adjacent circular holes is 70 degrees, and the angle between the inclined connecting plate 2 and the horizontal direction is 21.16 degrees. Figure 1 (A-angle in the middle).

[0032] It should be noted that the preset shape mechanism is installed 10cm-30cm above the bed surface.

[0033] In some embodiments of this utility model, the bottom ends of two of the three fixing tubes 1 are inserted below the bed layer to different depths, while the bottom end of the third fixing tube is placed above the bed layer. Preferably, the bottom end of the fixing tube is inserted 80cm-120cm below the bed layer.

[0034] As can be seen, this utility model breaks up bubbles that have not yet emerged from the bed surface by using two fixed tubes 1 with their bottom ends inserted into the bed layer. It can also break up bubbles at different positions by using a fixed tube 1 with its bottom end above the bed layer. Furthermore, it increases the contact area with the bubbles by using a preset shape mechanism, thereby breaking up large bubbles that have escaped from the bed surface. This avoids friction damage to the particle size distribution of the bed layer caused by the breaking up of large bubbles, and achieves the effects of breaking up bubbles and preventing the re-aggregation of bubbles.

[0035] It is worth noting that changing the depth at which the bottom ends of the three fixed tubes 1 are inserted below the bed surface has different effects on breaking up bubbles and preventing bubble aggregation, that is, different effects on reducing surging.

[0036] In some other embodiments of this utility model, the three fixed pipes 1 are respectively provided with top sealing heads, and the upper part of the top sealing head is connected to the body short pipe flange of the top sealing head by flange bolts.

[0037] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A bubble breaking device for a silane fluidized bed reactor, characterized by, Includes at least two fixed tubes and a pre-shaped mechanism; among which, Each fixed tube is connected to a horizontally positioned preset shape mechanism; The pre-shaped mechanism includes a connecting plate, a clamping plate, and at least two circular holes. At least two clamping plates are connected to the outer wall of each circular hole, and the opposing clamping plates between each pair of circular holes are connected by the connecting plate.

2. The bubble breaking device for a silane fluidized bed reactor according to claim 1, characterized in that, include: The connecting plate and the clamping plate are connected by bolt holes.

3. The bubble breaking device for a silane fluidized bed reactor of claim 1, wherein, include: Three circular holes and three fixed pipes; the three fixed pipes are respectively the pressure tapping pipe of the silane fluidized bed reactor, the temperature measuring pipe of the silane fluidized bed reactor, and the feed pipe of the silane fluidized bed reactor; The three circular holes are respectively connected to the pressure tapping pipe of the silane fluidized bed reactor, the temperature measuring pipe of the silane fluidized bed reactor, and the feed pipe of the silane fluidized bed reactor.

4. The bubble breaking device for a silane fluidized bed reactor of claim 3, wherein, include: Two of the three fixed tubes are inserted below the bed layer at different depths, while the bottom of the third fixed tube is placed above the bed layer.

5. The bubble breaking device for a silane fluidized bed reactor of claim 4, wherein, include: The bottom end of the fixed tube is inserted 80cm-120cm below the bed.

6. The bubble breaking device for a silane fluidized bed reactor according to claim 3, characterized in that, include: The three fixing pipes are connected to the three circular holes by bolts.

7. The bubble breaking device for a silane fluidized bed reactor according to claim 3, characterized in that, include: Each of the three fixed pipes is equipped with a top end cap, and the upper part of the top end cap is connected to the flange of the short pipe body of the top end cap by flange bolts.

8. The bubble breaking device for a silane fluidized bed reactor according to claim 1, characterized in that, include: The outer surfaces of the fixed tube and the preset shape mechanism are coated with protective coatings.

9. The bubble breaking device for a silane fluidized bed reactor according to claim 1, characterized in that, include: The pre-shaped mechanism is installed 10cm-30cm above the bed surface.

10. The bubble breaking device for a silane fluidized bed reactor according to any one of claims 1-9, characterized in that, include: The preset shape mechanism is triangular, with the included angle between two adjacent circular holes being 65-75 degrees, and the included angle between the inclined connecting plate in the triangle and the horizontal direction being 20-22 degrees.

Images