Novel polycrystalline silicon tail gas recovery adsorption column

Abstract

The utility model provides a novel polycrystalline silicon tail gas recovery adsorption column, which relates to the technical field of polycrystalline silicon, and comprises a shell connected with a tail gas inlet, a tail gas outlet, a heat exchange medium inlet and a heat exchange medium outlet; the filler area is positioned between the tail gas inlet and the tail gas outlet and is used for filling an adsorbent; the heat exchange clamping pipes are uniformly distributed in the shell and comprise inner pipes and outer pipes which are connected in a sleeving manner; the lower end of the outer pipe is connected with the heat exchange medium outlet, and the top of the outer pipe is closed. The lower end of the inner pipe is connected with the heat exchange medium inlet, and an inclined notch is formed in the top of the inner pipe and forms an inclined end face of the top of the inner pipe. When the inner pipe is heated to expand, only the tip part of the notch moves to the inner side of the top of the outer pipe, the circulation effect of a heat exchange medium is not affected, and therefore the heat exchange effect is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of polysilicon, in particular to a novel polysilicon tail gas recovery adsorption column. Background Art

[0002] The polysilicon tail gas recovery adsorption column mainly uses the loaded adsorbent to adsorb the pollutants in the polysilicon tail gas, and separates the pollutants and valuable gases in the tail gas, thereby achieving the purpose of tail gas purification and resource recovery.

[0003] The heat exchange clamp tube of the existing adsorption column includes an inner tube and an outer tube, the inner tube is connected to the water inlet, and the outer tube is connected to the water outlet. Figure 1 As shown, the top end surface of the inner tube is horizontal and close to the top of the outer tube. When hot water enters the inner tube, the inner tube expands due to the heat, and the distance between the top end surface of the inner tube and the inner side of the top of the outer tube decreases, and the two even contact each other, resulting in a smaller water flow rate, thereby causing the problem of poor heat exchange effect.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or any form of implication that the information constitutes the prior art known to those skilled in the art. Utility Model Content

[0005] In view of the above situation, the utility model provides a new type of polysilicon tail gas recovery adsorption column, which aims to solve the technical problem that the existing inner tube expands due to heat, the distance between the top end face of the inner tube and the top inner side of the outer tube is reduced, and even the two contact each other, resulting in a smaller water flow rate and thus a worse heat exchange effect.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] In a first aspect, the utility model provides a novel polysilicon tail gas recovery adsorption column, comprising:

[0008] The shell is connected with an exhaust gas inlet, an exhaust gas outlet, a heat exchange medium inlet and a heat exchange medium outlet;

[0009] A packing area, located between the tail gas inlet and the tail gas outlet, for packing the adsorbent;

[0010] A plurality of heat exchange clamps evenly distributed in the shell, including a sleeved inner tube and an outer tube;

[0011] The lower end of the outer tube is connected to the heat exchange medium outlet, and the top of the outer tube is closed;

[0012] The lower end of the inner tube is connected to the heat exchange medium inlet, and the top of the inner tube is provided with an inclined cutout, which forms an inclined end surface of the top of the inner tube.

[0013] In some embodiments of the present invention, an elastic pad is provided between the inner tube and the outer tube.

[0014] In some embodiments of the present invention, a plurality of fins are evenly distributed on the outer wall of the outer tube.

[0015] In some embodiments of the present invention, the adsorbent includes activated carbon.

[0016] In some embodiments of the present invention, a plurality of coaxially arranged tube clamping ring layers are provided in the shell, and each tube clamping ring layer includes at least one heat exchange tube clamp.

[0017] In some embodiments of the present invention, there are 61 heat exchange clamps in total.

[0018] In some embodiments of the present invention, there are 5 tube clamping ring layers in total, and the number of heat exchange clamping tubes included in each tube clamping ring layer from the inside to the outside is 1, 6, 12, 18, and 24 respectively.

[0019] In some embodiments of the present invention, an air intake distribution structure connected to the exhaust gas inlet is also included.

[0020] In some embodiments of the present invention, the air intake distribution structure includes an air intake ring pipe arranged along the circumference of the shell, and the air intake ring pipe is connected to a plurality of air intake heads evenly distributed in the shell.

[0021] In some embodiments of the present invention, a filter structure is provided on the air intake head.

[0022] The embodiments of the present invention have at least the following advantages or beneficial effects:

[0023] The top of the inner tube has an inclined cutout, which forms an inclined end surface of the top of the inner tube. In this way, when the inner tube expands due to heat, only the tip of the cutout will move toward the inside of the top of the outer tube, which will not affect the circulation effect of the heat exchange medium, thereby ensuring the heat exchange effect.

[0024] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1It is a schematic diagram of the structure of the inner tube and the outer tube in the prior art;

[0027] Figure 2 A schematic diagram of the structure of a novel polysilicon tail gas recovery adsorption column provided in an embodiment of the utility model;

[0028] Figure 3 A schematic diagram of the structure of the inner tube and the outer tube provided in an embodiment of the utility model;

[0029] Figure 4 It is a schematic diagram of a structure in which a plurality of heat exchange clamps are evenly distributed in a shell;

[0030] Figure 5 is a structural schematic diagram of the air intake distribution structure;

[0031] Figure 6 Schematic diagram of the fin structure.

[0032] Figure 1 Icons in: 61 - inner tube, 62 - outer tube.

[0033] Figure 2~Figure 6 Icons in: 1-shell, 11-exhaust gas inlet, 12-exhaust gas outlet, 13-heat exchange medium inlet, 14-heat exchange medium outlet, 2-filling area, 3-heat exchange clamp tube, 31-inner tube, 311-cutout, 32-outer tube, 321-fin, 33-gasket, 41-intake ring tube, 42-intake head, 43-filter structure. DETAILED DESCRIPTION

[0034] In the following, only some exemplary embodiments are briefly described. As those skilled in the art can appreciate, the described embodiments can be modified in various different ways without departing from the spirit or scope of the embodiments of the present invention.

[0035] In the description of the embodiments of the present invention, it should be understood that the terms "longitudinal", "upper", "lower", "top", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0036] In addition, the term "plurality" means two or more than two, unless clearly and specifically defined otherwise.

[0037] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0038] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0039] See also Figure 1 to Figure 6 This embodiment provides a novel polysilicon tail gas recovery adsorption column, including a shell 1, a filler area 2 and a heat exchange clamp 3.

[0040] The shell 1 is connected with an exhaust gas inlet 11 , an exhaust gas outlet 12 , a heat exchange medium inlet 13 and a heat exchange medium outlet 14 .

[0041] The packing area 2 is located between the tail gas inlet 11 and the tail gas outlet 12 and is used to pack an adsorbent. In a specific implementation scenario, the adsorbent includes activated carbon.

[0042] A plurality of heat exchange clamps 3 are evenly distributed in the shell 1, and the heat exchange clamps 3 longitudinally penetrate the packing area 2. Specifically, the shell 1 has a plurality of coaxially arranged clamp ring layers, each of which includes at least one heat exchange clamp 3; more specifically, there are 61 heat exchange clamps 3 in total, and 5 clamp ring layers in total, and the number of heat exchange clamps 3 included in each clamp ring layer from the inside to the outside is 1, 6, 12, 18, and 24, respectively.

[0043] The heat exchange clamp 3 includes a sleeved inner tube 31 and an outer tube 32; the lower end of the outer tube 32 is connected to the heat exchange medium outlet 14, and the top of the outer tube 32 is a closed hemispherical shape. The lower end of the inner tube 31 is connected to the heat exchange medium inlet 13, and the top of the inner tube 31 has an inclined cutout 311, and the angle between the cutout 311 and the horizontal plane is 40°~60°. The cutout 311 forms an inclined end surface of the top of the inner tube 31. In this way, when the inner tube 31 expands due to heat, only the tip of the cutout 311 will move to the inner side of the top of the outer tube 32, which does not affect the circulation effect of the heat exchange medium, thereby ensuring the heat exchange effect.

[0044] An elastic pad 33 is provided between the inner tube 31 and the outer tube 32 to separate and position the inner tube 31 and the outer tube 32 .

[0045] A plurality of (8) fins 321 are evenly distributed on the outer wall of the outer tube 32 to increase the heat exchange area.

[0046] The novel polysilicon tail gas recovery adsorption column also includes an air intake distribution structure connected to the tail gas inlet 11, so that the tail gas is evenly distributed in the shell 1, so as to be evenly contacted with the adsorbent to ensure the adsorption effect. In a specific implementation scenario, the air intake distribution structure includes an air intake ring pipe 41 arranged along the circumference of the shell 1, and the air intake ring pipe 41 is connected to a plurality of air intake heads 42 evenly distributed in the shell 1, and the air intake head 42 has a filtering structure 43, for example, including a filter screen.

[0047] The novel polysilicon tail gas recovery adsorption column also includes an exhaust gas distribution structure connected to the tail gas outlet 12, and the exhaust gas distribution structure is set with reference to the intake gas distribution structure.

[0048] In combination with the above content, this embodiment has at least the following beneficial effects:

[0049] 1. The top of the inner tube 31 has an inclined cutout 311, which forms an inclined end surface of the top of the inner tube 31. In this way, when the inner tube 31 expands due to heat, only the tip of the cutout 311 will move toward the inner side of the top of the outer tube 32, which will not affect the circulation effect of the heat exchange medium, thereby ensuring the heat exchange effect.

[0050] Second, multiple heat exchange clamps 3 are evenly distributed in the shell 1, especially arranged in the following manner, which is conducive to ensuring the heat exchange effect: there are 61 heat exchange clamps 3 in total, 5 clamp ring layers in total, and the number of heat exchange clamps 3 included in each clamp ring layer from the inside to the outside is 1, 6, 12, 18, and 24 respectively.

[0051] 3. The air intake distribution structure makes the exhaust gas evenly distributed in the shell 1, so that it is in uniform contact with the adsorbent to ensure the adsorption effect.

[0052] Fourth, a plurality of fins 321 are evenly distributed on the outer wall of the outer tube 32 to increase the heat exchange area.

[0053] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. In the absence of conflicts, the embodiments of the present application and the features in the embodiments may be combined with each other at will. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel polysilicon tail gas recovery adsorption column, characterized in that: include: The shell is connected with an exhaust gas inlet, an exhaust gas outlet, a heat exchange medium inlet and a heat exchange medium outlet; A packing area, located between the tail gas inlet and the tail gas outlet, for packing an adsorbent; A plurality of heat exchange clamps evenly distributed in the shell, including a sleeved inner tube and an outer tube; The lower end of the outer tube is connected to the heat exchange medium outlet, and the top of the outer tube is closed; The lower end of the inner tube is connected to the heat exchange medium inlet, and the top of the inner tube has an inclined cutout, which forms the inclined end surface of the top of the inner tube.

2. The novel polysilicon tail gas recovery adsorption column according to claim 1 is characterized in that: An elastic cushion block is arranged between the inner tube and the outer tube.

3. The novel polysilicon tail gas recovery adsorption column according to claim 1 is characterized in that: A plurality of fins are evenly distributed on the outer wall of the outer tube.

4. The novel polysilicon tail gas recovery adsorption column according to claim 1 is characterized in that: The adsorbent includes activated carbon.

5. The novel polysilicon tail gas recovery adsorption column according to claim 1 is characterized in that: The shell body is provided with a plurality of coaxially arranged tube clamping ring layers, and each of the tube clamping ring layers includes at least one heat exchange tube clamp.

6. The novel polysilicon tail gas recovery adsorption column according to claim 5 is characterized in that: There are 61 heat exchange clamps in total.

7. The novel polysilicon tail gas recovery adsorption column according to claim 6 is characterized in that: There are five tube clamping ring layers in total, and the numbers of the heat exchange clamping tubes included in each tube clamping ring layer from the inside to the outside are 1, 6, 12, 18, and 24 respectively.

8. The novel polysilicon tail gas recovery adsorption column according to any one of claims 1 to 7, characterized in that: It also includes an air intake distribution structure connected to the exhaust gas inlet.

9. The novel polysilicon tail gas recovery adsorption column according to claim 8, characterized in that: The air intake distribution structure comprises an air intake ring pipe arranged along the circumference of the shell, and the air intake ring pipe is connected to a plurality of air intake heads evenly distributed in the shell.

10. The novel polysilicon tail gas recovery adsorption column according to claim 9, characterized in that: The air intake head is provided with a filtering structure.

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