CN213995154U - Silicon powder filter for polycrystalline silicon production - Google Patents
Silicon powder filter for polycrystalline silicon production Download PDFInfo
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- CN213995154U CN213995154U CN202022591020.4U CN202022591020U CN213995154U CN 213995154 U CN213995154 U CN 213995154U CN 202022591020 U CN202022591020 U CN 202022591020U CN 213995154 U CN213995154 U CN 213995154U
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Abstract
The utility model discloses a silica flour filter for in polycrystalline silicon production belongs to polycrystalline silicon production technical field, including card and filter core, a plurality of connecting holes have been seted up on the card, the filter core is equipped with the filter core of filtration pore for open-top and lateral wall, be equipped with the internal thread on the inner wall of connecting hole, the upper portion outside of filter core is equipped with the external screw thread, the filter core passes through the screw thread and is connected with the connecting hole, and the last plane of connecting hole is stretched out at the filter core top after the installation, solves silica flour filter connection structure in the polycrystalline silicon production among the prior art, leads to the easy damage of filter core connecting portion because receive the washing away of the gaseous of filter core coming out easily to lead to leaking the problem of silica flour.
Description
Technical Field
The utility model belongs to the technical field of polycrystalline silicon production, concretely relates to silica flour filter for in polycrystalline silicon production.
Background
During the process of preparing polysilicon by the improved Siemens method, the by-product SiCl is reduced4At present, the cold hydrogenation technology is basically adopted, and the reaction principle is Si +2H2+3SiCl4=4SiHCl3The working temperature is about 550 ℃, and the pressure is within the range of 20-30 barG. In fact give birth toIn the production process, the cold hydrogenation fluidized bed can carry a part of silicon powder to enter a subsequent system, so that the problems of blocking and abrasion of process equipment and pipelines are caused.
Generally, after a fluidized bed reactor, solids with the diameter of more than 5um are intercepted by arranging a cyclone separator, so that the problems of blockage and abrasion can be relieved. However, the problem that solid particles below 5um cannot be completely intercepted still exists, and the problem of blocking and abrasion of a process system is solved by effectively intercepting solid particles with micro sizes through installing a metal sintered filter on a polycrystalline silicon production line.
The filter element of the present metal sintered filter is installed on a flower plate (the flower plate is on, the filter element is under) through a threaded connection, the flower plate is used for assembling the filter element, the installation structure is shown as the attached figure 1, a common connection structure is adopted, and the following problems are found to exist in the installation structure in use:
1. the top of the filter element does not extend out of the flower plate, and after the gas comes out of the filter element, the connecting part of the flower plate is easy to wash;
2. the filter element can be only installed under the pattern plate and can be only installed from inside to outside, the installation space is limited, and the convenience is not high;
3. when the filter element arranged in the center is damaged, the fixed-point leakage stoppage cannot be realized;
4. difficult to change, when the damaged filter core of installing at central authorities need be changed, need dismantle the damaged filter core of central authorities with peripheral filter core, just can change.
Therefore, it is necessary to design a more ingenious structure, so as to improve the working efficiency and reduce the labor intensity of the working personnel.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving the silica flour filter connection structure in the polycrystalline silicon production among the prior art, easily because receive the gaseous washing away that the filter core came out, lead to the filter core connecting portion easy damaged to lead to leaking the problem of silica flour.
In order to achieve the above purpose, the technical solution of the present invention is as follows:
the utility model provides a silica flour filter for in polycrystalline silicon production, includes card and filter core, a plurality of connecting holes have been seted up on the card, the filter core is the filter core that open-top and lateral wall were equipped with the filtration pore, be equipped with the internal thread on the inner wall of connecting hole, the upper portion outside of filter core is equipped with the external screw thread, the filter core passes through the screw thread and is connected with the connecting hole, and the last plane of connecting hole is stretched out at the filter core top after the installation.
Further, the upper portion of filter core is the pipe cone connector, the screw thread on the filter core is the pipe cone screw thread.
Further, an inner nut and an outer nut are arranged on the outer side of the upper part of the filter element, and the inner sides of the inner nut and the outer nut are connected with the upper part of the filter element through threads; the outer sides of the inner nut and the outer nut are connected with the connecting hole through threads.
Further, after the inner nut and the outer nut are assembled, the upper ends of the inner nut and the outer nut are higher than the upper plane of the connecting hole.
Further, the internal threads of the inner nut and the external nut are opposite to the rotation direction of the external threads.
Further, the aperture of the filter element filter hole is not more than 100 um.
The utility model has the advantages that:
firstly, in the utility model, the silicon powder filter is an improved structure on the original structure, the filter core at the position generally adopts a metal sintered filter core, and part of the structure at the top of the filter core for connecting the flower plate extends out of the upper surface of the flower plate, so that the direct scouring of gas on the flower plate can be reduced, and the service life of the filter core is prolonged; meanwhile, the structure that the flower plate extends out of the top of the filter element can extend out of the flower plate part of the top of the filter element when the filter element is damaged and leaked, and the filter element is plugged through the plug with the internal thread without replacing the filter element.
Two, in the utility model discloses, the upper portion of filter core is the pipe cone connector, screw thread on the filter core is pipe cone screw thread, and pipe cone screw thread is more stable than the connected mode in conventional pipe thread.
Thirdly, in the utility model, the outer side of the upper part of the filter element is provided with an inner nut and an outer nut, and the inner sides of the inner nut and the outer nut are connected with the upper part of the filter element through threads; the outer sides of the inner nut and the outer nut are connected with the connecting holes through threads, the inner nut and the outer nut can be screwed out from the upper portion of the pattern plate through the ingenious design, and therefore the purpose of replacing the filter element is achieved, and the filter element is particularly suitable for the filter element arranged at the center.
Fourthly, the utility model discloses in, inside and outside nut assembly back, the upper end of inside and outside nut is higher than the last plane of connecting hole, and the staff of being convenient for dismantles inside and outside nut from upper portion, and then is convenient for renew cartridge.
Fifthly, the utility model discloses in, the ingenious internal thread with inside and outside nut designs into opposite direction with the direction of rotation of external screw thread, can guarantee in the installation of filter core, is unlikely to let inside and outside nut and card pine take off.
Sixth, the utility model discloses in, the aperture of filter core filtration pore is not more than 100um, in polycrystalline silicon production technology, is the silica flour particle of interception 100um and below through the filter generally, can choose the filter core in different filtration pore apertures for use according to, the condition of the preorder step of technology in the actual production.
Drawings
Fig. 1 is a schematic view of a connection structure of a filter element and a pattern plate of a silicon powder filter in the prior art.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic structural diagram of another embodiment of the present invention.
Fig. 4 is a schematic view of the structure of fig. 3 prior to installation.
FIG. 5 is a block diagram of yet another preferred embodiment.
Wherein, 1, a pattern plate; 2. a filter element; 3. connecting holes; 4. an internal thread; 5. an external thread; 6. inner and outer nuts; 7. a pipe cone connector; 8. pipe taper threads; 101. the upper plane of the pattern plate; 201. the filter element connecting head upper plane.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
Example 1
Referring to fig. 2, a silica flour filter for in polycrystalline silicon production belongs to polycrystalline silicon production technical field, including card 1 and filter core 2, a plurality of connecting holes 3 have been seted up on card 1, filter core 2 is open-top and lateral wall and is equipped with filter core 2 of filtration pore, be equipped with internal thread 4 on the inner wall of connecting hole 3, the upper portion outside of filter core 2 is equipped with external screw thread 5, filter core 2 is connected with connecting hole 3 through the screw thread, and the last plane of connecting hole 3 is stretched out at 2 tops of filter core after the installation.
The embodiment is the most basic embodiment, the filter element 2 generally adopts a metal sintered filter element 2, the top of the filter element 2 is used for connecting a part of the structure of the faceplate 1, and after installation, the filter element 2 extends out of the upper surface of the faceplate 1, that is, the upper plane 201 of the filter element connector of the filter element 2 is higher than the upper plane 101 of the faceplate 1, such a structure can solve the problem that in the prior art, the gas coming out of the filter element 2 is easy to wash the connection part of the faceplate 1, and the probability of breakage and leakage of the connection part of the filter element 2 is increased.
Example 2
Referring to the drawings 3 and 4, the silicon powder filter for polycrystalline silicon production comprises a flower plate 1 and a filter element 2, wherein the flower plate 1 is provided with a plurality of connecting holes 3, the filter element 2 is the filter element 2 with an opening at the top and filter holes in the side wall, inner threads 4 are arranged on the inner wall of the connecting holes 3, outer threads 5 are arranged on the outer side of the upper part of the filter element 2, the filter element 2 is connected with the connecting holes 3 through threads, and the top of the installed filter element 2 extends out of the upper plane of the connecting holes 3.
Furthermore, the upper part of the filter element 2 is a pipe cone connector 7, and the thread on the filter element 2 is a pipe cone thread 8.
The present embodiment is a better implementation manner, and the common connector on the upper portion of the existing filter element 2 is designed to be the pipe cone connector 7, wherein after the filter element 2 is installed on the flower plate 1, the upper plane 101 of the flower plate must be lower than the upper plane 201 of the filter element connector, and the pipe cone thread 8 is adopted to connect and lock, so that the fastening effect can be better.
Example 3
Referring to fig. 5, the embodiment is another preferred embodiment, and a silicon powder filter for use in polysilicon production includes a flower plate 1 and a filter element 2, a plurality of connection holes 3 are formed in the flower plate 1, the filter element 2 is a filter element 2 with an opening at the top and a filter hole on the side wall, an internal thread 4 is formed on the inner wall of the connection hole 3, an external thread 5 is formed on the outer side of the upper portion of the filter element 2, the filter element 2 is connected with the connection hole 3 through a thread, and the top of the installed filter element 2 extends out of the upper plane of the connection hole 3.
Further, the upper portion of filter core 2 is pipe cone connector 7, the screw thread on the filter core 2 is pipe cone screw thread 8.
Further, an inner nut and an outer nut 6 are arranged on the outer side of the upper portion of the filter element 2, and the inner sides of the inner nut and the outer nut 6 are connected with the upper portion of the filter element 2 through threads; the outer sides of the inner and outer nuts 6 are connected with the connecting holes 3 through threads.
The embodiment is a continuous improvement on the embodiment 2, the inner nut and the outer nut 6 are designed between the flower plate 1 and the filter element 2 of the silicon powder filter, and the problem that the structures in the embodiments 1 and 2 are only suitable for taking down the filter element 2 from the lower part of the flower plate 1 is solved.
Example 4
The utility model provides a silica flour filter for in polycrystalline silicon production, includes card 1 and filter core 2, a plurality of connecting holes 3 have been seted up on the card 1, filter core 2 is filter core 2 that open-top and lateral wall were equipped with the filtration pore, be equipped with internal thread 4 on the inner wall of connecting hole 3, the upper portion outside of filter core 2 is equipped with external screw thread 5, filter core 2 is connected with connecting hole 3 through the screw thread, and the last plane of connecting hole 3 is stretched out at 2 tops of filter core after the installation.
The outer side of the upper part of the filter element 2 is provided with an inner nut and an outer nut 6, and the inner sides of the inner nut and the outer nut 6 are connected with the upper part of the filter element 2 through threads; the outer sides of the inner and outer nuts 6 are connected with the connecting holes 3 through threads.
This embodiment is another preferred embodiment, and may also have similar effects to the technical solution in embodiment 3.
Example 5
On the basis of embodiment 4, furthermore, the aperture of the filter hole of the filter element 2 is 5um, and the cyclone separator is arranged in front, so that after large-particle silicon powder is initially intercepted, small-particle silicon powder with the aperture of about 5um is intercepted, the obtained silicon powder is convenient for subsequent treatment, and meanwhile, a good intercepting effect is achieved. Of course, the silicon powder filter can be selected for interception in production, the aperture of the filtering hole is not more than 100um generally, and the structure in the technical scheme is suitable for the silicon powder filter.
Claims (6)
1. A silica powder filter for use in the production of polycrystalline silicon, which is characterized in that: including card (1) and filter core (2), a plurality of connecting holes (3) have been seted up on card (1), filter core (2) are equipped with filter core (2) of filtration pore for open-top and lateral wall, be equipped with internal thread (4) on the inner wall of connecting hole (3), the upper portion outside of filter core (2) is equipped with external screw thread (5), filter core (2) are connected with connecting hole (3) through the screw thread, and the last plane of connecting hole (3) is stretched out at filter core (2) top after the installation.
2. The silicon powder filter for use in the production of polycrystalline silicon according to claim 1, wherein: the upper portion of filter core (2) is pipe cone connector (7), the screw thread on filter core (2) is pipe cone screw thread (8).
3. A silicon powder filter for use in the production of polycrystalline silicon according to claim 1 or 2, wherein: the outer side of the upper part of the filter element (2) is provided with an inner nut and an outer nut (6), and the inner sides of the inner nut and the outer nut (6) are connected with the upper part of the filter element (2) through threads; the outer sides of the inner nut (6) and the outer nut (6) are connected with the connecting hole (3) through threads.
4. The silicon powder filter for use in the production of polycrystalline silicon according to claim 3, wherein: after the inner nut and the outer nut (6) are assembled, the upper ends of the inner nut and the outer nut (6) are higher than the upper plane of the connecting hole (3).
5. The silicon powder filter for use in the production of polycrystalline silicon according to claim 4, wherein: the inner threads (4) of the inner nut and the outer nut (6) are opposite to the outer threads (5) in rotation direction.
6. The silicon powder filter for use in the production of polycrystalline silicon according to claim 5, wherein: the aperture of the filter hole of the filter element (2) is not more than 100 um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022591020.4U CN213995154U (en) | 2020-11-11 | 2020-11-11 | Silicon powder filter for polycrystalline silicon production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022591020.4U CN213995154U (en) | 2020-11-11 | 2020-11-11 | Silicon powder filter for polycrystalline silicon production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213995154U true CN213995154U (en) | 2021-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022591020.4U Active CN213995154U (en) | 2020-11-11 | 2020-11-11 | Silicon powder filter for polycrystalline silicon production |
Country Status (1)
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|---|---|
| CN (1) | CN213995154U (en) |
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2020
- 2020-11-11 CN CN202022591020.4U patent/CN213995154U/en active Active
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