Emergency movable conveying tank for waste silicon powder

By using an inclined mobile conveying tank and nitrogen pressure charging system during the silicon powder conveying process in the polysilicon industry, the problems of pipe wear and pipe blocking during the silicon powder conveying process are solved, and the timely transportation of waste silicon powder and the normal operation of trichlorosilicon synthesis device are achieved.

CN222683249UActive Publication Date: 2025-03-28INNER MONGOLIA TONGWEI SILICON ENERGY CO LTD
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Patent Information

Application Number
CN202421150143.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-24
Publication Date
2025-03-28
Estimated Expiration
2034-05-24

AI Technical Summary

Technical Problem

During the silicon powder transportation process in the polysilicon industry, due to the turning and climbing of the pipeline, abnormalities such as wear through and pipe blocking are prone to occur, resulting in slow delivery of silicon powder, affecting the normal operation of the trichlorosilicon synthesis device.

Method used

It provides a mobile conveying tank for emergency use of waste silicon powder, including a tilted tank body and a valve-loaded feed, discharge, venting and replacement pressure charging pipe, and uses the principles of nitrogen replacement and pressure charging to improve the powder feeding efficiency.

Benefits of technology

Through the inclined tank and nitrogen pressure charging system, waste silicon powder can be temporarily connected when the pipeline is abnormal, ensuring its timely transportation and improving the production efficiency of the trichlorosilicon synthesis device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of powder conveying, and provides an emergency movable conveying tank for waste silicon powder. The tank body is fixedly supported above the movable tray through a bracket; wherein the tank body is obliquely arranged, the upper side of the higher end of the tank body is provided with a valve blow-down pipe communicated with the interior of the tank body, and the upper side and the lower side of the lower end of the tank body are respectively provided with a valve feeding pipe and a valve discharging pipe which are communicated with the interior of the tank body and used for feeding and discharging waste silicon powder; and a valve replacement pressurizing pipe communicated with the interior of the tank body is arranged on the tank body between the valve blow-down pipe and the valve feed pipe, and is used for introducing nitrogen to replace and pressurize the interior of the tank body. Through the tank body which is obliquely arranged, waste silicon powder can be temporarily led out of the waste contact body tank and transferred to the trichlorosilane synthesis device to the maximum extent when a connecting pipeline between the waste contact body tank and the silicon powder storage tank of the trichlorosilane synthesis device is abraded through, blocked and the like; therefore, the timely conveying of the silicon powder and the normal operation of the trichlorosilane synthesis device are ensured.
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Description

Technical Field

[0001] The utility model relates to the technical field of powder material transportation, in particular to an emergency mobile transportation tank for waste silicon powder. Background Art

[0002] At present, the silicon powder captured by the cyclone and precision filter of the cold hydrogenation device in the polysilicon industry is pneumatically transported to the trichlorosilane synthesis device through pipelines to achieve the recycling of waste silicon powder.

[0003] During the silicon powder transportation process, since the waste contact tank of the cold hydrogenation unit is installed at a relatively low position, the pipeline connecting the waste contact tank and the silicon powder storage tank of the trichlorosilane synthesis unit will pass through the pipe gallery, with several turns and climbs in the middle. Pipeline wear is prone to occur at the turns, and pipe blockage is prone to occur at the climbs. Dealing with these anomalies will consume a lot of time, and overall the silicon powder transportation will be slow, reducing production efficiency, affecting the normal operation of the trichlorosilane synthesis unit. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an emergency mobile transport tank for waste silicon powder, which can be used as a temporary transport device for waste silicon powder when the connecting pipe between the waste contact tank and the silicon powder storage tank of the trichlorosilane synthesis device is worn out, blocked or the like, thereby ensuring the timely transport of silicon powder and the normal operation of the trichlorosilane synthesis device.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A mobile transport tank for emergency use of waste silicon powder, comprising:

[0007] Moving pallets; and

[0008] The tank body is fixedly supported on the movable pallet by a bracket;

[0009] Wherein, the tank body is arranged at an angle, and a valved vent pipe connected to the interior is provided on the upper side of its higher end, and a valved feed pipe and a valved discharge pipe connected to the interior and used for the entry and exit of waste silicon powder are respectively provided on the upper and lower sides of its lower end; a valved replacement and pressurization pipe connected to the interior is provided on the tank body between the valved vent pipe and the valved feed pipe, which is used to introduce nitrogen to replace and pressurize the interior of the tank body.

[0010] In one embodiment disclosed in the present application, the inclination angle of the tank body ranges from 7 to 10°.

[0011] In one embodiment disclosed in the present application, the inclination angle of the tank body is 8°.

[0012] In one embodiment disclosed in the present application, the valved discharge pipe comprises a venturi tube;

[0013] The first inlet of the venturi tube is connected to the interior of the tank, and the second inlet is connected to a nitrogen source with a predetermined pressure;

[0014] The outlet of the venturi tube is connected to the silicon powder storage tank of the trichlorosilane synthesis device.

[0015] In one embodiment disclosed in the present application, the predetermined pressure of the nitrogen source is 0.3 MPa.

[0016] In one embodiment disclosed in the present application, a pipe with a valve and a pressure gauge connected to the interior of the tank body is provided on the tank body between the valved feed pipe and the valved replacement and pressure charging pipe.

[0017] In one embodiment disclosed in the present application, a manhole is provided at the lower portion of the lower end of the tank body for personnel to enter and exit the tank body for maintenance and safety inspection.

[0018] In one embodiment disclosed in the present application, a hand hole is provided in the middle of the higher end of the tank body, for inserting a hand or a tool into the tank body for maintenance and safety inspection.

[0019] In one embodiment disclosed in the present application, the nominal diameter of the vent pipe with valve is 50 mm;

[0020] The nominal diameter of the valved feed pipe is 100 mm;

[0021] The nominal diameter of the valved discharge pipe is 80 mm;

[0022] The nominal diameter of the valved replacement charging tube is 25 mm;

[0023] The nominal diameter of the pipe with valve and pressure gauge is 50mm;

[0024] The nominal diameter of the manhole is 500 mm;

[0025] The nominal diameter of the hand hole is 250 mm.

[0026] In an embodiment disclosed in the present application, a universal caster is provided at each of the four lower corners of the mobile tray, and each of the universal casters has a braking function.

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] 1. The inclined tank body can make full use of the effective space inside the tank body when the waste silicon powder is discharged into the tank body, and prevent the waste silicon powder from blocking the pipe mouth of the valved vent pipe. When the connecting pipe between the waste contact tank and the silicon powder storage tank of the trichlorosilane synthesis unit is worn out, blocked, etc., the waste silicon powder can be temporarily taken out of the waste contact tank and transported to the trichlorosilane synthesis unit to ensure the timely transportation of silicon powder and the normal operation of the trichlorosilane synthesis unit.

[0029] 2. The inclination angle of the tank body ranges from 7 to 10 degrees, which can ensure that the waste silicon powder enters the tank with good fluidity and slowly climbs up, while avoiding excessive dust when the waste silicon powder is discharged into the tank body.

[0030] 3. By using nitrogen at a predetermined pressure from a nitrogen source in conjunction with the principle of a Venturi tube to transport waste silicon powder, the powder delivery efficiency can be effectively improved, thereby saving time and further improving the production efficiency of the trichlorosilane synthesis device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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 embodiments or the description of the prior art 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.

[0032] Figure 1 It is a schematic diagram of the structure of the utility model;

[0033] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of local A in the middle. DETAILED DESCRIPTION

[0034] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In 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 connection; 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 present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0040] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0041] See also Figure 1 As shown, the utility model provides a mobile transport tank for emergency use of waste silicon powder, comprising:

[0042] Moving tray 10; and

[0043] The tank body 20 is fixedly supported on the movable tray 10 by a bracket 21;

[0044] Among them, the tank body 20 is arranged at an angle, and a valved vent pipe 22 connected to the interior is provided on the upper side of its higher end, and a valved feed pipe 23 and a valved discharge pipe 24 connected to the interior and used for the entry and exit of waste silicon powder are respectively provided on the upper and lower sides of its lower end; a valved replacement and pressurization pipe 25 connected to the interior is provided on the tank body 20 between the valved vent pipe 22 and the valved feed pipe 23, which is used to introduce nitrogen to replace and pressurize the interior of the tank body 20.

[0045] When in use, the valved vent pipe 22 is connected to the vent main pipe through a metal hose, and the waste contact tank of the cold hydrogenation device (not shown in the figure) is connected to the valved feed pipe 23 of the tank body 20 with a metal hose; the tank body 20 is first replaced with nitrogen through the valved replacement pressure pipe 25, and then the waste silicon powder is discharged into the tank body 20 through the valved feed pipe 23; because the tank body 20 is tilted, the waste silicon powder will slowly climb up after entering the tank, making the maximum possible use of the effective space inside the tank body 20, and at the same time preventing the waste silicon powder from being loaded into the tank body 20. When the waste silicon powder is present, the outlet of the valved vent pipe 22 is blocked; after the tank body 20 is filled with waste silicon powder, the mobile conveying tank is delivered to the trichlorosilane synthesis device by a tractor (not shown in the figure) connected to the mobile pallet 10, and the valved discharge pipe 24 is connected to the silicon powder storage tank (not shown in the figure) of the trichlorosilane synthesis device, and nitrogen is then introduced into the tank body 20 through the valved replacement pressure charging pipe 25 to pressurize it, and the waste silicon powder in the tank body 20 is delivered to the silicon powder storage tank of the trichlorosilane device through the valved discharge pipe 24. That is to say, by tilting the tank body 20, the effective space inside the tank body 20 can be fully utilized when the waste silicon powder is discharged into the tank body 20, and at the same time, the waste silicon powder can be prevented from clogging the pipe opening of the valved vent pipe 22, so that the waste silicon powder can be temporarily taken out of the waste contact tank and transported to the trichlorosilane synthesis unit when the connecting pipe between the waste contact tank and the silicon powder storage tank of the trichlorosilane synthesis unit is worn out, blocked, etc., to the maximum extent possible, thereby ensuring the timely transportation of silicon powder and the normal operation of the trichlorosilane synthesis unit.

[0046] See also Figure 1 As shown, the inclination angle (indicated by α in the figure) of the tank body 20 ranges from 7 to 10 degrees. In this way, the waste silicon powder can enter the tank with good fluidity and slowly climb up, while avoiding excessive dust when the waste silicon powder is discharged into the tank body 20.

[0047] In this embodiment, the optimal inclination angle of the tank body 20 is 8°.

[0048] See also Figure 2 As shown, the valved discharge pipe 24 includes a venturi tube, the first inlet of the venturi tube is connected to the inside of the tank body 20, the second inlet is connected to a nitrogen source of predetermined pressure, and the outlet of the venturi tube is connected to the silicon powder storage tank of the trichlorosilane synthesis device. By transporting waste silicon powder with nitrogen of predetermined pressure from the nitrogen source in conjunction with the principle of the venturi tube, the powder delivery efficiency can be effectively improved, thereby saving time and further improving the production efficiency of the trichlorosilane synthesis device.

[0049] In this embodiment, the predetermined pressure of the nitrogen source is 0.3 MPa.

[0050] In order to monitor the pressure inside the tank body 20 in real time, a valved pressure gauge pipe 26 communicating with the interior of the tank body 20 is provided on the tank body 20 between the valved feed pipe 23 and the valved replacement charging pipe 25 .

[0051] A manhole 27 is provided at the lower part of the lower end of the tank body 20 for personnel to enter and exit the tank body 20 for maintenance and safety inspection.

[0052] A hand hole 28 is provided in the middle of the higher end of the tank body 20 for inserting a hand or a tool into the tank body 20 for maintenance and safety inspection.

[0053] In this embodiment, the nominal diameter (DN, omitted below) of the valved vent pipe 22 is 50 mm, the nominal diameter of the valved feed pipe 23 is 100 mm, the nominal diameter of the valved discharge pipe 24 is 80 mm, the nominal diameter of the valved replacement charging pipe 25 is 25 mm, the nominal diameter of the valved and pressure gauge pipe 26 is 50 mm, the nominal diameter of the manhole 27 is 500 mm, and the nominal diameter of the hand hole 28 is 250 mm.

[0054] A universal caster 11 is provided at each of the four corners below the mobile tray 10, and each universal caster 11 has a brake function. Through the traction of the tractor and the rolling of the four universal casters 11, the mobile transport tank can be conveniently transported to the trichlorosilane synthesis device, and then the brakes of each universal caster 11 are stepped on in turn to keep the mobile transport tank stationary.

[0055] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.

Claims

1. A mobile transport tank for emergency use of waste silicon powder, characterized in that: include: Moving pallets; and The tank body is fixedly supported on the movable pallet by a bracket; Wherein, the tank body is arranged at an angle, and a valved vent pipe connected to the interior is provided on the upper side of its higher end, and a valved feed pipe and a valved discharge pipe connected to the interior and used for the entry and exit of waste silicon powder are respectively provided on the upper and lower sides of its lower end; a valved replacement and pressurization pipe connected to the interior is provided on the tank body between the valved vent pipe and the valved feed pipe, which is used to introduce nitrogen to replace and pressurize the interior of the tank body.

2. The mobile emergency transport tank for waste silicon powder according to claim 1 is characterized in that: The inclination angle of the tank body ranges from 7 to 10 degrees.

3. The mobile emergency transport tank for waste silicon powder according to claim 2 is characterized in that: The inclination angle of the tank body is 8°.

4. The mobile emergency transport tank for waste silicon powder according to any one of claims 1 to 3, characterized in that: The valved discharge pipe comprises a venturi tube; The first inlet of the venturi tube is connected to the interior of the tank, and the second inlet is connected to a nitrogen source with a predetermined pressure; The outlet of the venturi tube is connected to the silicon powder storage tank of the trichlorosilane synthesis device.

5. The mobile emergency transport tank for waste silicon powder according to claim 4 is characterized in that: The predetermined pressure of the nitrogen source is 0.3 MPa.

6. The mobile emergency transport tank for waste silicon powder according to claim 1 is characterized in that: A pipe with a valve and a pressure gauge connected to the interior of the tank body is provided on the tank body between the valved feeding pipe and the valved replacement pressure charging pipe.

7. The mobile emergency transport tank for waste silicon powder according to claim 6 is characterized in that: A manhole is provided at the lower part of the lower end of the tank body for personnel to enter and exit the tank body for maintenance and safety inspection.

8. The mobile emergency transport tank for waste silicon powder according to claim 7 is characterized in that: A hand hole is provided in the middle of the higher end of the tank body, for inserting a hand or a tool into the tank body for maintenance and safety inspection.

9. The mobile emergency transport tank for waste silicon powder according to claim 8 is characterized in that: The nominal diameter of the valved vent pipe is 50 mm; The nominal diameter of the valved feed pipe is 100 mm; The nominal diameter of the valved discharge pipe is 80 mm; The nominal diameter of the valved replacement charging tube is 25 mm; The nominal diameter of the pipe with valve and pressure gauge is 50mm; The nominal diameter of the manhole is 500 mm; The nominal diameter of the hand hole is 250 mm.

10. The mobile transport tank for emergency use of waste silicon powder according to any one of claims 1 to 3 and 5 to 9, characterized in that: A universal caster is respectively arranged at the four corners below the mobile tray, and each of the universal casters has a braking function.