CN213943063U

CN213943063U - Energy-efficient cold hydrogenation device

Info

Publication number: CN213943063U
Application number: CN202022660136.9U
Authority: CN
Inventors: 张小辉; 吴厚金; 张海峰; 顾德杰; 王峰
Original assignee: Nanjing Chengyi Industrial Technology Co ltd
Current assignee: Nanjing Chengyi Industrial Technology Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-08-13
Anticipated expiration: 2030-11-17

Abstract

The utility model relates to a cold hydrogenation reaction unit of energy-efficient, including barrel and cyclone, cyclone passes through discharging pipe and barrel intercommunication, the low head is installed to the lower extreme of barrel, low head bottom intercommunication has the intake pipe, the distributing plate is installed to barrel and low head junction, the distributing plate mainly comprises gas distribution head and gas distribution board, the overhead evenly distributed of gas distribution has the gas pocket, be equipped with a plurality of baffling posts that crisscross parallel arrangement each other in the catalytic reaction district, be equipped with the feed inlet that communicates catalytic reaction district and be located baffling post bottom on the barrel, the upper cover is installed to the barrel upper end, the metal film filter is installed with the upper cover junction to the barrel, the discharging pipe sets up at upper cover top central point and puts, be equipped with the recoil pipe that four intermittence blown on the upper cover. The utility model discloses an optimize the structure of gaseous phase even circulation, make the interior reaction of fluidized bed high-efficient complete, effective energy saving.

Description

Energy-efficient cold hydrogenation device

Technical Field

The utility model relates to a cold hydrogenation technical field, concretely relates to energy-efficient cold hydrogenation reaction unit.

Background

Polysilicon is an important basic material for electronic information industry and solar photovoltaic power generation, and the Siemens method is the most widely applied process method for producing polysilicon at present, but a large amount of silicon tetrachloride is generated in the production process. The cold hydrogenation technology is used for solving the problem, closed-loop production and comprehensive utilization are realized by converting silicon tetrachloride into raw material trichlorosilane or preparing white carbon black by taking the silicon tetrachloride as the raw material, the economic benefit of enterprises is improved and the environmental protection problem is solved, generally, a fluidized bed process is adopted in a cold hydrogenation method, the production efficiency is effectively improved by utilizing the advantage of high flow rate and high heat transfer speed of a fluidized bed, but the gas phase in the existing fluidized bed is not uniformly distributed and circulated, so that the silicon powder is not fully reacted, the continuous reaction capacity of the fluidized bed is lower, and more fine and light silicon powder raw materials can be taken away by gas phase flow, so that the energy consumption of the silicon powder raw materials is caused, and more working loads are borne by a cyclone separator.

SUMMERY OF THE UTILITY MODEL

For solving the problem that proposes among the above-mentioned background art, the utility model provides a cold hydrogenation reaction unit of energy-efficient, through the structure of optimizing gaseous phase even circulation, make the interior reaction of fluidized bed high-efficient complete, effective energy saving.

The utility model provides a following technical scheme:

an efficient energy-saving cold hydrogenation reaction device comprises a cylinder body and a cyclone separator, wherein the cyclone separator is communicated with the cylinder body through a discharge pipe, a lower end enclosure is arranged at the lower end of the cylinder body, the bottom of the lower end enclosure is communicated with an air inlet pipe, a distribution plate is arranged at the joint of the cylinder body and the lower end enclosure, the distribution plate mainly comprises a gas distribution head and a gas distribution plate, the gas distribution head is uniformly distributed with gas holes, a catalytic reaction zone is arranged in the middle section in the cylinder body, a plurality of baffling columns which are staggered and arranged in parallel are arranged in the catalytic reaction zone, the cylinder body is provided with a feed inlet which is communicated with the catalytic reaction zone and is positioned at the bottom end of the baffling column, an upper end enclosure is arranged at the upper end of the cylinder body, a metal film filter is arranged at the joint of the cylinder body and the upper end enclosure, the discharging pipe is arranged at the center of the top of the upper end enclosure, and four back flushing pipes for intermittent blowing are arranged on the upper end enclosure.

Preferably, the gas distribution plate comprises an installation ring arranged on the outer part, a vertical column arranged at the center of the installation ring, connecting plates for fixedly connecting the installation ring and the vertical column in an annular distribution manner, and ventilating meshes filled between the connecting plates.

Preferably, the axial length of the connecting plate along the mounting ring is 0.5-0.75 times the axial length of the mounting ring.

Preferably, the gas distribution head is hemispherical.

Preferably, the cyclone is connected with a gas phase pipe and a solid phase pipe, respectively.

Preferably, the back-flushing pipe is circumferentially distributed and communicated with the inner cavity of the upper sealing head.

(1) The utility model has the advantages that: the gas phase uniformly enters the cylinder body through the arranged distribution plate, the ventilation meshes filled between the connection plates carry out effective flow equalization, then secondary flow equalization is carried out through the air holes uniformly distributed on the hemispherical gas distribution head, and a plurality of baffling columns which are staggered and arranged in parallel in the catalytic reaction area carry out dispersion and diversion on the gas phase after the reaction, so that the structure for uniform circulation of the gas phase is optimized, and the reaction in the fluidized bed is more efficient and complete; the metal film filter intercepts and filters fine light silicon powder which does not fully react along with gas phase flow, the metal film filter is blown by four back-flushing pipes which are intermittently blown, the intercepted silicon powder is blown away from the metal film filter and falls off to return to a catalytic reaction zone for reaction, consumption of silicon powder raw material energy is avoided, and good and stable working load of the cyclone separator is kept.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a catalytic reaction zone in the cylinder of the present invention;

fig. 3 is a schematic structural diagram of the distribution plate of the present invention.

The labels in the figure are: 1-a cylinder body; 2-lower end enclosure; 3, an air inlet pipe; 4, sealing the head; 5-a distribution plate; 510-gas distribution head; 511-air holes; 520-gas distribution plate; 521-a mounting ring; 522-column; 523-connecting plate; 524-ventilating mesh; 6-a catalytic reaction zone; 7-a feed inlet; 8-a baffled column; 9-metal membrane filters; 10-a discharge pipe; 11-a cyclone separator; 12-gas phase tube; 13-a solid phase tube; 14-back flushing the tube.

Detailed Description

Referring to fig. 1-3, the embodiment provides a high-efficiency energy-saving cold hydrogenation reaction apparatus, which includes a cylinder 1 and a cyclone separator 11, the cyclone separator 11 is communicated with the cylinder 1 through a discharge pipe 10, a lower end enclosure 2 is installed at the lower end of the cylinder 1, the bottom of the lower end enclosure 2 is communicated with an air inlet pipe 3, a distribution plate 5 is installed at the connection position of the cylinder 1 and the lower end enclosure 2, the distribution plate 5 mainly includes an air distribution head 510 and an air distribution plate 520, the air distribution head 510 is hemispherical, air holes 511 are uniformly distributed on the air distribution head 510, the air distribution plate 520 includes an external installation ring 521, a column 522 arranged at the center of the installation ring 521, a connecting plate 523 for fixedly connecting the installation ring 521 and the column 522 in an annular manner, and ventilation mesh holes 524 filled between the connecting plates 523, in order to enhance the connection stability between the connecting plate 523 and the installation ring 521 and the column 522, the axial length of the connecting plate 523 along the mounting ring 521 is 0.5-0.75 times of the axial length of the mounting ring 521, a catalytic reaction area 6 is arranged in the middle section of the interior of the cylinder 1, a plurality of baffling columns 8 which are staggered and arranged in parallel are arranged in the catalytic reaction area 6, a feed inlet 7 which is communicated with the catalytic reaction area 6 and is positioned at the bottom ends of the baffling columns 8 is arranged on the cylinder 1, an upper end enclosure 4 is arranged at the upper end of the cylinder 1, a metal membrane filter 9 is arranged at the joint of the cylinder 1 and the upper end enclosure 4, a discharge pipe 10 is arranged at the central position of the top of the upper end enclosure 4, four backwashing pipes 14 which blow intermittently are arranged on the upper end enclosure 4, the backwashing pipes 14 are circumferentially distributed and communicated with the inner cavity of the upper end enclosure 4, and the cyclone separator 11 is respectively connected with a gas phase pipe 12 and a solid phase pipe 13.

The working principle of the utility model is as follows, silica powder raw material is continuously added to silica powder bed layer in the catalytic reaction zone 6 through the feed inlet 7, the prepared catalyst in the catalytic reaction zone 6 is reacted, gas phase reaction material is introduced through the air inlet pipe 3, the gas phase uniformly enters the barrel body 1 through the distribution plate 5, the ventilation mesh 524 filled between the connection plates 523 is effectively equalized, secondary equalization is performed through the air holes 511 uniformly distributed on the hemispherical gas distribution head 510, the silica powder bed layer in the catalytic reaction zone 6 reacts with the flowing gas phase material to generate violent movement and rapid mixing, the gas phase material rapidly transfers heat with the silica powder, a plurality of baffling columns 8 which are staggered and arranged in parallel mutually in the catalytic reaction zone 6 disperse and guide the gas phase after participating in the reaction, thereby the reaction in the fluidized bed is more efficient and complete, the metal film filter 9 intercepts and filters the tiny light silica powder which does not fully react along with the gas phase flow, the metal membrane filter 9 is blown by four back flushing pipes 14 which are intermittently blown, the intercepted silicon powder is blown away from the metal membrane filter 9 and falls back to the catalytic reaction zone 6 for reaction, so that the consumption of silicon powder raw material energy is avoided, and the gas-solid separation is carried out on the gas-phase substances and the reaction products which are filtered by the metal membrane filter 9 by the cyclone separator 11 and are respectively communicated with the gas-phase pipe 12 and the solid-phase pipe 13.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. The utility model provides an energy-efficient cold hydrogenation device, includes barrel (1) and cyclone (11), cyclone (11) through discharging pipe (10) with barrel (1) intercommunication, its characterized in that: the lower end socket (2) is installed at the lower end of the barrel body (1), an air inlet pipe (3) is communicated with the bottom of the lower end socket (2), a distribution plate (5) is installed at the joint of the barrel body (1) and the lower end socket (2), the distribution plate (5) mainly comprises an air distribution head (510) and an air distribution plate (520), air holes (511) are uniformly distributed on the air distribution head (510), a catalytic reaction area (6) is arranged in the middle section of the interior of the barrel body (1), a plurality of baffling columns (8) which are staggered and arranged in parallel are arranged in the catalytic reaction area (6), a feed inlet (7) which is communicated with the catalytic reaction area (6) and is positioned at the bottom end of the baffling columns (8) is arranged on the barrel body (1), an upper end socket (4) is installed at the upper end of the barrel body (1), and a metal film filter (9) is installed at the joint of the barrel body (1) and the upper end socket (4), the discharge pipe (10) is arranged at the center of the top of the upper sealing head (4), and four recoil pipes (14) for intermittent blowing are arranged on the upper sealing head (4).

2. The high-efficiency energy-saving cold hydrogenation reaction device according to claim 1, characterized in that: the air distribution plate (520) comprises an installation ring (521) arranged on the outside, a vertical column (522) arranged at the center of the installation ring (521), connecting plates (523) used for fixedly connecting the installation ring (521) and the vertical column (522) in annular distribution, and ventilation meshes (524) filled between the connecting plates (523).

3. The high-efficiency energy-saving cold hydrogenation reaction device according to claim 2, characterized in that: the axial length of the connecting plate (523) along the mounting ring (521) is 0.5-0.75 times of the axial length of the mounting ring (521).

4. The high-efficiency energy-saving cold hydrogenation reaction device according to claim 1, characterized in that: the gas distribution head (510) is hemispherical.

5. The high-efficiency energy-saving cold hydrogenation reaction device according to claim 1, characterized in that: the cyclone separator (11) is respectively connected with a gas phase pipe (12) and a solid phase pipe (13).

6. The high-efficiency energy-saving cold hydrogenation reaction device according to claim 1, characterized in that: the backflushing pipe (14) is circumferentially distributed and communicated with the inner cavity of the upper seal head (4).