Gas-solid reaction device
By designing the reaction chamber, diversion part and cyclone separator of the gas-solid reaction device, the problem of solid raw materials blocked in the reactor in the form of a deflector is solved, and higher stability and conversion rate are achieved, reducing the risk of maintenance and operation.
Patent Information
- Application Number
- CN202420609585.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-26
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-26
AI Technical Summary
The reactor in the form of a deflector is prone to blockage during the feeding of solid raw materials, resulting in poor stability, reduced conversion rate, difficult maintenance and high operating risks.
A gas-solid reaction device is designed, including a reaction chamber, a flow guide and a cyclone separator. Through the combination of a multi-layer grid flow guide plate and a flow guide bundle, the solid raw material is uniformly diffused and gas-solid separation is avoided, and local accumulation and blockage are avoided.
It effectively alleviates the problem of clogging of solid raw materials in the reactor, improves the stability and conversion rate of the reactor, reduces the difficulty of maintenance and operation risks, and extends the residence time of solid materials in the reaction room.
Smart Images
Figure CN222574855U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of polysilicon production, in particular to a gas-solid reaction device. Background Art
[0002] In the field of polysilicon production, the emergence of new guide plate structure reactors with high conversion rates in recent years has led to the development of similar guide plate type reactors in the industry.
[0003] With regard to the internal structure of the guide plate type reactor, due to the horizontal grid plate structure, the solid raw materials are located on the upper part of the grid plate when entering the reactor, and are in contact with the gas for a longer time, which greatly improves the conversion efficiency; but due to the small distribution gap of the guide plate, the solid raw materials are easily piled up and bridged after entering, resulting in uneven distribution of the solid raw materials on the guide plate. The solid raw materials stay on the upper layers of the guide plates and accumulate for a long time, accumulating to the solid raw material feed port and causing blockage. Therefore, it is difficult to feed the solid raw materials, resulting in a decrease in the conversion rate.
[0004] Therefore, the guide plate reactor has the following disadvantages after the feed is blocked:
[0005] Poor stability. Due to the small spacing between the internal guide plate grids, solid raw materials are prone to form accumulation and agglomeration on the upper layer of the guide plate. Long-term accumulation blocks the solid raw material inlet, making it impossible for solid raw materials to enter.
[0006] The conversion rate decreases, and the spacing between the guide plate grilles is enlarged to a certain extent, resulting in a significant decrease in the conversion rate. A smaller spacing can easily lead to blockage.
[0007] The maintenance is difficult, and the guide plate needs to be cleaned layer by layer to remove the agglomerated and accumulated solid raw materials each time it is overhauled. The maintenance time is long, the process is cumbersome, and the maintenance workload is large.
[0008] The operation risk is high because when the solid raw material inlet is blocked, there is a high risk of high-temperature and high-pressure leakage in the reactor when the blocked pipeline is cleared. The high-frequency clearing work will also bring great operational risks. Utility Model Content
[0009] In view of this, the utility model provides a gas-solid reaction device, the main purpose of which is to alleviate the problem of solid raw material blockage in the gas-solid reactor.
[0010] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:
[0011] The utility model provides a gas-solid reaction device, which comprises: a reaction chamber, a flow guide part and a cyclone separator;
[0012] The lower end of the reaction chamber is connected to the gas feed pipe, and the side wall of the reaction chamber is connected to the solid feed pipe;
[0013] The guide part includes a plurality of guide beams and a multi-layer grid guide plate, the multi-layer grid guide plates are arranged in the reaction chamber along the vertical direction, and the plurality of guide beams are vertically arranged between the grid guide plates and the solid feed pipe;
[0014] The cyclone separator is arranged above the guide beam, and the upper outlet pipe of the cyclone separator penetrates the top wall of the reaction chamber.
[0015] The purpose of the utility model and the solution to its technical problems can also be further achieved by adopting the following technical measures.
[0016] Optionally, the guide part also includes a plurality of upper ribs and a plurality of lower ribs, the upper ribs and the lower ribs are respectively fixedly connected to the inner wall of the reaction chamber, a plurality of insert tubes are arranged in sequence on the side surfaces of the lower ribs, the upper end of the guide beam is connected to the upper ribs by bolts, the lower end of the guide beam is fixedly connected to the insert rod, and the insert rod is inserted into the insert tube.
[0017] Optionally, two adjacent upper ribs are arranged alternately up and down.
[0018] Optionally, a first manhole mechanism is installed on the side wall of the reaction chamber between the guide beam and the grid guide plate.
[0019] Optionally, a second manhole mechanism is installed on the side wall of the reaction chamber below the grid guide plate.
[0020] Optionally, a third manhole mechanism is installed on the side wall of the reaction chamber above the guide beam.
[0021] Optionally, it also includes a sedimentation pipe, the upper end of which is connected to the lower outlet of the cyclone separator, and the lower end of which extends to the location of the guide beam.
[0022] Optionally, a temperature sensor is further included, wherein the temperature sensor is installed on the top wall of the reaction chamber, and the detection end of the temperature sensor extends to the location of the guide beam.
[0023] Optionally, the guide beam adopts a channel steel structure.
[0024] By means of the above technical solution, the utility model has at least the following advantages:
[0025] Taking a polysilicon fluidized bed reactor as an example (silicon tetrachloride, hydrogen and silicon powder react to form trichlorosilane), the gas materials (silicon tetrachloride and hydrogen) enter the reaction chamber from the gas feed pipe and rise upward; at the same time, the solid material (silicon powder) enters the reaction chamber from the solid feed pipe, and the silicon powder flows downward along the gap between two adjacent guide beams, and then passes through the pores of each layer of grid guide plates.
[0026] In the above process, the gas material and the solid material flow towards each other.
[0027] In the area where the guide beam is located, the gas material blows the solid material to make the solid material evenly diffuse to the area where the guide beam is located. The evenly diffused solid material settles on the grid guide plate, and local bridging accumulation of solid material is not easy to form on the upper surface of the grid guide plate.
[0028] At the same time, even if the light solid material in the area where the guide beam is located rises directly to the top of the reaction chamber with the airflow, after entering the cyclone separator along the tangential feed pipe, it will undergo gas-solid separation in the cyclone separator, and the solid material will settle again to the area where the guide beam is located, thereby avoiding the loss of light solid materials, increasing the residence time of light solid materials in the reaction chamber, and making the reaction more complete.
[0029] Moreover, the distance between the grid guide plate and the solid feed pipe is at least greater than the height of the guide beam. Even if local solid material bridging and accumulation occurs on the grid guide plate, it will not affect the solid material entering the reaction chamber in a short period of time, thereby reducing the frequency of clearing blockages in the reaction chamber. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 A schematic diagram of the axial cross-sectional structure of a gas-solid reaction device provided in an embodiment of the utility model;
[0031] Figure 2 The figure is a schematic side view of the installation of the guide beam;
[0032] Figure 3 The figure is a top view of the installation of the guide beam;
[0033] Figure 4 It is a side view of the guide beam;
[0034] Figure 5 This is the front view of the guide beam.
[0035] The figure marks in the drawings of the specification include: reaction chamber 1, gas feed pipe 2, solid feed pipe 3, guide beam 4, grid guide plate 5, cyclone separator 6, upper outlet pipe 7, tangential feed pipe 8, hydrogen purge pipe 9, upper rib plate 10, lower rib plate 11, insert pipe 12, insert rod 13, first manhole mechanism 14, second manhole mechanism 15, third manhole mechanism 16, sedimentation pipe 17, temperature sensor 18. DETAILED DESCRIPTION
[0036] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the specific implementation methods, structures, features and effects of the utility model application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.
[0037] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.
[0038] like Figure 1 As shown, an embodiment of the utility model provides a gas-solid reaction device, which includes: a reaction chamber 1, a flow guide part and a cyclone separator 6;
[0039] The lower end of the reaction chamber 1 is connected to the gas feed pipe 2, and the side wall of the reaction chamber 1 is connected to the solid feed pipe 3;
[0040] The guide part includes a plurality of guide beams 4 and a multi-layer grid guide plate 5, wherein the multi-layer grid guide plates 5 are arranged in the reaction chamber 1 along the vertical direction, and the plurality of guide beams 4 are vertically arranged between the grid guide plates 5 and the solid feed pipe 3;
[0041] The cyclone separator 6 is disposed above the guide beam 4 , and an upper outlet pipe 7 of the cyclone separator 6 penetrates the top wall of the reaction chamber 1 .
[0042] A gas-solid reaction device works as follows:
[0043] Taking a polysilicon fluidized bed reactor as an example (silicon tetrachloride, hydrogen and silicon powder react to form trichlorosilane), gas materials (silicon tetrachloride and hydrogen) enter the reaction chamber 1 from the gas feed pipe 2 and rise upward; at the same time, solid materials (silicon powder) enter the reaction chamber 1 from the solid feed pipe 3, and the silicon powder flows downward along the gap between two adjacent guide beams 4, and then passes through the pores of each layer of grid guide plates 5.
[0044] In the above process, the gas material and the solid material flow towards each other.
[0045] In the area where the guide beam 4 is located, the gas material blows the solid material to make the solid material evenly diffuse to the area where the guide beam 4 is located. The evenly diffused solid material settles to the grid guide plate 5, and it is not easy to form local bridging accumulation of solid material on the upper surface of the grid guide plate 5.
[0046] At the same time, even if the light solid material in the area where the guide beam 4 is located rises directly to the top of the reaction chamber 1 with the airflow, after entering the cyclone separator 6 along the tangential feed pipe 8 of the cyclone separator 6, it will undergo gas-solid separation in the cyclone separator 6, and the solid material will settle again to the area where the guide beam 4 is located, thereby avoiding the loss of light solid materials, increasing the residence time of light solid materials in the reaction chamber 1, and making the reaction more complete.
[0047] Moreover, the distance between the grid guide plate 5 and the solid feed pipe 3 is at least greater than the height of the guide beam 4. Even if local solid material bridging occurs on the grid guide plate 5, it will not affect the solid material entering the reaction chamber 1 in a short time, thereby reducing the frequency of clearing blockages in the reaction chamber 1.
[0048] In the technical solution of the utility model, the gas-solid reaction device is used to fully utilize the advantages of the guide beam 4 and the grid guide plate 5, thereby alleviating the problem of solid raw material blockage in the reactor, so that the gas-solid reaction device can operate stably for a long time, efficiently, and at the same time, the residence time of the solid material in the reaction chamber 1 is extended by the cyclone separator 6.
[0049] Specifically, the tube wall of the solid feed pipe 3 is connected to the hydrogen purge pipe 9. When the solid material (silicon powder) enters the reaction chamber 1 along the solid feed pipe 3, the hydrogen purge pipe 9 fills hydrogen into the solid feed pipe 3, and the mixture of hydrogen and solid material enters the reaction chamber 1, thereby improving the dispersion of the solid material (silicon powder) when it just enters the reaction chamber 1.
[0050] like Figure 1 , Figure 2 and Figure 3 As shown, in a specific embodiment, the guide portion also includes a plurality of upper ribs 10 and a plurality of lower ribs 11, the upper ribs 10 and the lower ribs 11 are respectively fixedly connected to the inner wall of the reaction chamber 1, and a plurality of inserts 12 are arranged in sequence on the side of the lower rib 11, the upper end of the guide beam 4 is connected to the upper rib 10 by bolts, and the lower end of the guide beam 4 is fixedly connected to the insert rod 13, and the insert rod 13 is inserted into the insert tube 12.
[0051] In this embodiment, specifically, both ends of the upper rib plate 10 are connected to the inner wall of the reaction chamber 1 by bolts, and both ends of the lower rib plate 11 are connected to the inner wall of the reaction chamber 1 by bolts; the upper end side of the guide beam 4 and the upper rib plate 10 are respectively provided with bolt holes, and the insert rod 13 is welded to the lower end of the guide beam 4.
[0052] Specifically, when installing the guide beam 4, after the insertion rod 13 at the lower end of the guide beam 4 is inserted into the insertion tube 12, the bolt hole on the upper end side of the guide beam 4 corresponds to the bolt hole of the upper rib plate 10. At this time, the bolts are used to pass through the two bolt holes in sequence, and the nuts are connected. The guide beam 4 is fixed between the upper rib plate 10 and the lower rib plate 11.
[0053] like Figure 2 As shown, in a specific embodiment, two adjacent upper ribs 10 are arranged alternately up and down.
[0054] In this embodiment, specifically, two adjacent upper ribs 10 are arranged alternately up and down, and when bolts are inserted into the bolt holes of the two adjacent upper ribs 10, the installation spaces of the upper and lower rows of bolts are staggered to avoid mutual interference.
[0055] like Figure 1 As shown, in a specific embodiment, a first manhole mechanism 14 is installed on the side wall of the reaction chamber 1 between the guide beam 4 and the grid guide plate 5.
[0056] In this embodiment, specifically, when inspecting the gas-solid reaction device, the operator does not need to remove the guide beam 4 , and can clean the residual materials on the upper grid guide plate 5 by opening the manhole cover of the first manhole mechanism 14 .
[0057] like Figure 1 As shown, in a specific embodiment, a second manhole mechanism 15 is installed on the side wall of the reaction chamber 1 below the grille guide plate 5 .
[0058] In this embodiment, specifically, the operator can open the manhole cover of the second manhole mechanism 15 to check whether the gas feed pipe 2 is blocked.
[0059] like Figure 1 As shown, in a specific embodiment, a third manhole mechanism 16 is installed on the side wall of the reaction chamber 1 above the guide beam 4.
[0060] In this embodiment, specifically, the operator can open the manhole cover of the third manhole mechanism 16, check the installation of the upper rib plate 10 and the guide beam 4, and check whether the bolt connection is loose.
[0061] like Figure 1 As shown, in a specific embodiment, it also includes a settling pipe 17, the upper end of the settling pipe 17 is connected to the lower end outlet of the cyclone separator 6, and the lower end of the settling pipe 17 extends to the position of the guide beam 4.
[0062] In this embodiment, specifically, the solid material (silicon powder) settled in the cyclone separator 6 can directly reach the location of the guide beam 4 again along the settling pipe 17, and experience the process of rising with the air flow again, thereby extending the time length for the solid material (silicon powder) to participate in the reaction.
[0063] like Figure 1As shown, in a specific embodiment, a temperature sensor 18 is further included. The temperature sensor 18 is installed on the top wall of the reaction chamber 1, and the detection end of the temperature sensor 18 extends to the location of the guide beam 4.
[0064] In this embodiment, specifically, the temperature sensor 18 is a thermocouple temperature sensor 18 , and the detection end of the temperature sensor 18 extends to the location of the guide beam 4 , so as to monitor the temperature of the reaction material in the reaction chamber 1 in real time.
[0065] like Figure 3 , Figure 4 and Figure 5 As shown, in a specific implementation, the guide bundle 4 adopts a channel steel structure.
[0066] In this embodiment, specifically, the guide beam 4 adopts a channel steel structure, and the inner concave surface of the channel steel structure constrains the descending path of the solid material (silicon powder), and at the same time, also constrains the rising path of the gas material, so that the solid material (silicon powder) is evenly distributed, and the solid material and the gas material are more fully contacted and reacted in the channel steel structure.
[0067] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A gas-solid reaction device, characterized in that: include: A reaction chamber, wherein the lower end of the reaction chamber is connected to a gas feed pipe, and the side wall of the reaction chamber is connected to a solid feed pipe; A guide portion, the guide portion comprising a plurality of guide beams and a multi-layer grid guide plate, the multi-layer grid guide plates are arranged in the reaction chamber along a vertical direction, and the plurality of guide beams are vertically arranged between the grid guide plates and the solid feed pipe; A cyclone separator is arranged above the guide beam, and an upper outlet pipe of the cyclone separator penetrates the top wall of the reaction chamber.
2. The gas-solid reaction device according to claim 1, characterized in that: The guide part also includes a plurality of upper ribs and a plurality of lower ribs, which are respectively fixedly connected to the inner wall of the reaction chamber, and a plurality of insert tubes are arranged in sequence on the side surfaces of the lower ribs. The upper end of the guide bundle is connected to the upper ribs by bolts, and the lower end of the guide bundle is fixedly connected to an insert rod, which is inserted into the insert tube.
3. The gas-solid reaction device according to claim 2, characterized in that: Two adjacent upper rib plates are arranged alternately up and down.
4. The gas-solid reaction device according to any one of claims 1 to 3, characterized in that: A first manhole mechanism is installed on the side wall of the reaction chamber between the guide beam and the grid guide plate.
5. The gas-solid reaction device according to any one of claims 1 to 3, characterized in that: A second manhole mechanism is installed on the side wall of the reaction chamber below the grid guide plate.
6. The gas-solid reaction device according to any one of claims 1 to 3, characterized in that: A third manhole mechanism is installed on the side wall of the reaction chamber above the guide beam.
7. The gas-solid reaction device according to any one of claims 1 to 3, characterized in that: It also includes a settling pipe, the upper end of which is connected to the lower outlet of the cyclone separator, and the lower end of which extends to the location of the guide beam.
8. The gas-solid reaction device according to any one of claims 1 to 3, characterized in that: It also includes a temperature sensor, which is installed on the top wall of the reaction chamber, and the detection end of the temperature sensor extends to the location of the guide beam.
9. The gas-solid reaction device according to any one of claims 1 to 3, characterized in that: The guide beam adopts a channel steel structure.