Discharging pipe of fluidized bed reactor

Abstract

The utility model provides a blanking pipe of a fluidized bed reactor, aiming at solving the technical problem that the blanking pipe in the reactor is easy to wear in the prior art. The blanking pipe comprises a basic pipe which is of a hollow cylindrical structure; the lining pipe is arranged on the inner wall of the foundation pipe and completely covers the inner wall of the foundation pipe; the connecting flange is arranged at one end of the base pipe; the outer protective layer is arranged on the outer wall of the foundation pipe in a sleeving manner and is located at the other end of the foundation pipe; wherein the end, provided with the outer protective layer, of the base pipe is located in the reactor, and the outer portion of the section, located in the reactor, of the base pipe is covered with the outer protective layer. The inner wall of the foundation pipe is protected through the lining pipe, the inner wall of the foundation pipe is prevented from being abraded when silicon powder particles are fed into a reactor, then the outer protection layer arranged outside the foundation pipe can prevent the silicon powder particles from scouring the foundation pipe under high-speed movement in the reactor, and therefore the outer wall of the foundation pipe is prevented from being abraded.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidized bed reactors, in particular to a feed pipe of a fluidized bed reactor. Background Art

[0002] As a key element in hydrogenation, the fluidized bed reactor operates by introducing a gas (process gas) or liquid as a fluidizing medium into the reactor, keeping a large number of silicon powder particles in a state of continuous suspension and motion. This interaction between the fluidizing medium and the silicon powder particles causes the particles to exhibit fluid-like behavior, allowing them to freely move, mix, and collide with each other within the fluidizing medium, creating what is known as "solid fluidization."

[0003] Under the high-speed erosion of silicon powder particles and the high-temperature (over 550°C) working environment, the insertion tube (feeding tube) in the reactor becomes a part that is easily worn. The problem of easy wear and falling off of the feeder tube has become a difficult problem that plagues the stable production of major chemical plants. Utility Model Content

[0004] Aiming at the technical problem in the prior art that a feed pipe is easily worn in a reactor, the utility model provides a feed pipe for a fluidized bed reactor, which has the advantages of enhancing the strength of the feed pipe and reducing the wear rate of the feed pipe.

[0005] The technical solution of the utility model is:

[0006] A discharge pipe of a fluidized bed reactor, comprising:

[0007] Base tube, a hollow cylindrical structure;

[0008] An inner lining pipe is provided on the inner wall of the base pipe and completely covers the inner wall of the base pipe;

[0009] A connecting flange is provided on one end of the base pipe;

[0010] An outer protective layer is sleeved on the outer wall of the base pipe and is located on the other end of the base pipe;

[0011] The end of the base pipe having the outer protective layer is located in the reactor, and the outside of a section of the base pipe located in the reactor is covered by the outer protective layer.

[0012] Optionally, a transition layer is provided between the base pipe and the liner pipe.

[0013] Optionally, glue is applied to both the inner and outer sides of the transition layer, and the transition layer is bonded to the liner pipe and the base pipe respectively.

[0014] Optionally, a positioning block is provided on the inner wall of the end of the base pipe, the end of the transition layer abuts against the positioning block, and the outer wall of the inner lining pipe has a stepped portion matching the positioning block.

[0015] Optionally, the inner lining pipe comprises a plurality of tubular monomers, and all the tubular monomers are connected end to end and arranged coaxially.

[0016] Optionally, the outer protective layer is connected to the base pipe by pins, and the pins are located at one end of the outer protective layer close to the middle of the base pipe.

[0017] Optionally, the outer protective layer is detachably arranged on the base pipe, there are two such pins on the outer protective layer, and the included angle between the length directions of the two pins is 80° - 100°.

[0018] Optionally, the base pipe passes through the connecting flange, and the connecting flange is welded to the end of the base pipe.

[0019] Optionally, the end of the inner lining pipe protrudes from the end of the base pipe and is turned outwards to wrap the end of the base pipe.

[0020] Optionally, the thickness dimension of the outer protective layer is greater than that of the inner lining pipe.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] An inner lining pipe is arranged inside the base pipe, and an outer protective layer is arranged outside the base pipe. The inner wall of the base pipe is protected by the inner lining pipe to avoid abrasion of the inner wall of the base pipe when silicon powder particles are fed into the reactor. Then, the outer protective layer arranged outside the base pipe can prevent the silicon powder particles from scouring the base pipe under the high-speed movement in the reaction, thereby avoiding abrasion of the outer wall of the base pipe.

[0023] In this technical solution, the base layer is protected by arranging the inner lining pipe and the outer protective layer, so as to achieve the purpose of reducing the wear speed of the feeding pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0026] Figure 2Schematic cross-sectional structure diagram of the present utility model;

[0027] Figure 3 is Figure 2 an enlarged schematic view of part A in Specific embodiments

[0028] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present utility model. Therefore, the drawings and descriptions are considered to be exemplary in nature rather than restrictive.

[0029] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present utility model is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0030] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0031] The embodiments of the present utility model will be described in detail below with reference to the drawings.

[0032] Embodiment:

[0033] Such as Figure 1 , Figure 2 and Figure 3As shown in the figure, in this embodiment, a feeding pipe of a fluidized bed reactor is disclosed, which includes a base pipe 10, a lining pipe 20, a connecting flange 30, and an outer protective layer 40. Specifically, the base pipe 10 is a hollow cylindrical structure and is made of an alloy, usually an alloy with the grade of 800H.

[0034] The lining pipe 20 is arranged inside the base pipe 10 and is fixedly connected to the inner wall of the base pipe 10. The length of the lining pipe 20 is greater than or equal to the length of the base pipe 10. At the same time, the lining pipe 20 completely covers the inner wall of the base pipe 10. Among them, the lining pipe 20 is made of silicon nitride.

[0035] The connecting flange 30 is arranged at one end of the base pipe 10, and the material of the connecting flange 30 is the same as that of the base pipe 10. The base pipe 10 passes through the connecting flange 30, and the connecting flange 30 is welded to the end of the base pipe 10. An outer protective layer 40 is sleeved outside the other end of the base pipe 10, and the outer protective layer 40 is made of silicon carbide.

[0036] Among them, when the feeding pipe is installed on a reactor (not shown in the figure), the length direction of the entire feeding pipe forms an angle of about 50° with the horizontal direction. At the same time, the outer wall of the section of the feeding pipe located inside the reactor is completely covered by the outer protective layer 40.

[0037] In this embodiment, the lining pipe 20 arranged inside the base pipe 10 is made of silicon nitride, and silicon nitride has good wear resistance. Therefore, the inner wall of the base pipe 10 can be protected by the lining pipe 20 to avoid wear of the inner wall of the base pipe 10 when silicon powder particles are fed into the reactor. The outer protective layer 40 arranged outside the base pipe 10 is made of silicon carbide, which can prevent the silicon powder particles from scouring the base pipe 10 under the high-speed movement in the reaction, thereby avoiding wear of the outer wall of the base pipe 10.

[0038] In this technical solution, by arranging the lining pipe 20 and the outer protective layer 40 to protect the base layer, the purpose of reducing the wear speed of the feeding pipe can be achieved.

[0039] In one specific embodiment:

[0040] A transition layer 50 is arranged between the base pipe 10 and the lining pipe 20, and the transition layer 50 is mainly used to meet the need of regulating the thermal expansion amount.

[0041] Preferably, glue is coated on both the inner wall and the outer wall of the transition layer 50, and the lining pipe 20 on its inner wall and the base pipe 10 on its outer wall are bonded through the glue.

[0042] In another specific embodiment:

[0043] The blanking pipe further includes a positioning block 60. The positioning block 60 is annular and is arranged on the inner wall of the base pipe 10, and is located at one end of the base pipe 10 with the outer protective layer 40.

[0044] The end of the above-mentioned transition layer 50 abuts against the positioning block 60. At the same time, a stepped portion 21 is provided on the outer wall of one end of the inner lining pipe 20. The stepped portion 21 is provided to make the outer diameter of this end of the inner lining pipe 20 smaller than the outer diameter of the middle part thereof. During installation, the positioning block 60 is stuck on the stepped portion 21.

[0045] In this embodiment, by arranging the positioning block 60 inside the end of the base pipe 10, the purpose of restricting the positions of the inner lining pipe 20 and the transition layer 50 is achieved.

[0046] In another specific embodiment:

[0047] Since the inner lining pipe 20 is made of silicon nitride, and silicon nitride has good wear resistance, but silicon nitride is relatively brittle. In order to reduce the damage rate of the inner lining pipe 20, the inner lining pipe 20 is provided as a plurality of tubular monomers 22.

[0048] All the tubular monomers 22 are coaxially arranged and are connected end to end. Among them, a stepped portion 21 is arranged on the outer wall of one tubular monomer 22 located at the end of the blanking pipe.

[0049] In another specific embodiment:

[0050] The outer protective layer 40 is detachably arranged on the base pipe 10. Specifically, the outer protective layer 40 is connected to the base pipe 10 through a pin 70. The pin 70 is located at one end of the outer protective layer 40 close to the middle part of the base pipe 10.

[0051] Generally, two pins 70 are arranged between the outer protective layer 40 and the base pipe 10. The length directions of the two pins 70 are both perpendicular to the axis of the base pipe 10. At the same time, there is an included angle of 80° - 100° between the length directions of the two pins 70.

[0052] Since the outer protective layer 40 is detachably arranged on the base pipe 10, when the blanking pipe works for a long time and the outer protective layer 40 is worn, the outer protective layer 40 can be replaced separately, thereby reducing the maintenance cost. In addition, there is an included angle of 80° - 100° between the length directions of the two pins 70, so that the two pins 70 are approximately located on the same side of the blanking pipe. When replacing the outer protective layer 40, the blanking pipe can be avoided from rotating.

[0053] In another specific embodiment:

[0054] The end of the inner lining pipe 20 far from the connecting flange 30 protrudes from the end of the base pipe 10 and turns outward to wrap the end of the base pipe 10, thereby avoiding the end of the base pipe 10 from being worn.

[0055] In another specific embodiment:

[0056] Since the movement speed of the silicon powder particles inside the blanking pipe is slower than that of the silicon powder particles in the reactor, the thickness dimension of the outer protective layer 40 is designed to be greater than that of the inner lining pipe 20, thereby reducing the thickness of the inner lining pipe 20 and the weight of the entire blanking pipe, and preventing the problem of deformation at the inclined end of the blanking pipe on the reactor.

[0057] The above-described embodiments only represent the specific implementation manners of the present utility model, and the description thereof is relatively specific and detailed. However, it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. A feed pipe for a fluidized bed reactor, characterized in that: Comprising: A base pipe, a hollow cylindrical structure; A lining pipe, disposed on the inner wall of the base pipe and completely covering the inner wall of the base pipe; A connecting flange, disposed on one end of the base pipe; An outer protective layer, sleeved on the outer wall of the base pipe and located on the other end of the base pipe; Wherein, one end of the base pipe with the outer protective layer is located inside the reactor, and the outer protective layer covers the outside of a section of the base pipe located inside the reactor.

2. The blanking pipe of the fluidized bed reactor according to claim 1, wherein A transition layer is provided between the base pipe and the lining pipe.

3. The blanking pipe of the fluidized bed reactor according to claim 2, wherein Glue is applied to both the inner side and the outer side of the transition layer, and the transition layer is bonded to the lining pipe and the base pipe respectively.

4. The blanking pipe of the fluidized bed reactor according to claim 2, wherein Positioning blocks are provided on the inner wall of the end of the base pipe, the end of the transition layer abuts against the positioning blocks, and the outer wall of the lining pipe has a stepped portion matching the positioning blocks.

5. The blanking pipe of the fluidized bed reactor according to claim 1, wherein The lining pipe comprises a plurality of tubular monomers, and all the tubular monomers are connected end to end and arranged coaxially.

6. The blanking pipe of the fluidized bed reactor according to claim 1, wherein The outer protective layer is connected to the base pipe by pins, and the pins are located at one end of the outer protective layer close to the middle of the base pipe.

7. The blanking pipe of the fluidized bed reactor according to claim 6, wherein The outer protective layer is detachably disposed on the base pipe, and there are two pins on the outer protective layer, and the included angle between the length directions of the two pins is 80° - 100°.

8. The blanking pipe of the fluidized bed reactor according to claim 1, wherein The base pipe passes through the connecting flange, and the connecting flange is welded to the end of the base pipe.

9. The blanking pipe of the fluidized bed reactor according to claim 1, wherein The end of the lining pipe protrudes from the end of the base pipe and is turned outwards to wrap the end of the base pipe.

10. The blanking pipe of the fluidized bed reactor according to claim 1, wherein The thickness dimension of the outer protective layer is greater than the thickness dimension of the lining pipe.

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