Device applied to chlorosilane disproportionation
By adopting the Johnson mesh structure and backwash system in the chlorosilane disproportionation unit, the problem of chlorosilane impurities entering the fixed bed is solved, the impurities are intercepted and evenly distributed, the consumption of raw and auxiliary materials is reduced, and the disproportionation efficiency and production stability are improved.
Patent Information
- Application Number
- CN202421643827.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-07-11
AI Technical Summary
In existing chlorosilane disproportionation systems, impurities in chlorosilane enter the fixed bed, causing damage to the disproportionation resin and increasing the cost of raw and auxiliary materials.
The first and second structural members of the Johnson mesh structure are designed and arranged at the upper and lower parts of the fixed bed reactor respectively. They are used for the chlorosilane feed and discharge pipelines to achieve impurity interception and uniform distribution. Combined with backwash and bypass pipelines, they ensure that the chlorosilane is in full contact with the resin and prevent the resin from escaping.
It effectively intercepts impurities in chlorosilane, reduces the cost of raw and auxiliary materials, ensures full contact between chlorosilane and resin, improves disproportionation efficiency, and restores the reactor pressure difference without stopping production, ensuring production continuity and stability.
Smart Images
Figure CN223304173U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of machinery, in particular to a device used for disproportionation of chlorosilane. Background Art
[0002] During the implementation of the present invention, it was discovered that although the existing technical solutions have systems for disproportionation of chlorosilanes, impurities in the chlorosilanes can enter the interior of the fixed bed, causing damage to the disproportionated resin. Chlorosilanes include silicon tetrachloride (STC), trichlorosilane (TCS), dichlorodihydrosilane (DTC), and monochlorotrihydrosilane (MCS). Disproportionation refers to the process in which TCS undergoes a disproportionation reaction to produce STC and DCS, which in turn produces TCS and MCS, which in turn produces silane and DC. Resin refers to an ion exchange resin, which is an insoluble polymer compound with a network structure and functional groups (active groups that exchange ions). Utility Model Content
[0003] In view of this, an embodiment of the present invention provides a device for disproportionation of chlorosilane, which can effectively intercept impurities in chlorosilane and reduce the cost of raw and auxiliary materials.
[0004] To achieve the above-mentioned objectives, according to an embodiment of the present invention, there is provided a device for disproportionation of chlorosilanes, comprising a fixed bed reactor, a first structural member, a second structural member, a chlorosilane feed pipeline, and a chlorosilane discharge pipeline; wherein the second structural member is arranged at the lower portion of the fixed bed reactor and is connected to the chlorosilane feed pipeline; the first structural member is arranged at the upper portion of the fixed bed reactor and is connected to the chlorosilane discharge pipeline; the first structural member and the second structural member are respectively designed to be formed by a Johnson net; and the chlorosilane feed pipeline is installed on the lower outer side surface of the fixed bed reactor, and the chlorosilane discharge pipeline is installed on the outer top of the fixed bed reactor.
[0005] Optionally, the first structural member includes a main pipe and a plurality of branch pipes;
[0006] The main pipe is connected to the chlorosilane discharge pipeline, and multiple branch pipes are arranged and connected to the main pipe.
[0007] Optionally, the second structural member includes a main pipe and a plurality of branch pipes;
[0008] The main pipe is connected to the chlorosilane feed pipeline, and a plurality of branch pipes are arranged and connected to the main pipe respectively.
[0009] Optionally, it includes: a reactor feed pressure gauge, a reactor discharge pressure gauge and a reactor differential pressure gauge; wherein the reactor feed pressure gauge is installed on the chlorosilane feed pipeline, the reactor discharge pressure gauge is installed on the chlorosilane discharge pipeline, and the reactor differential pressure gauge is installed between the reactor feed pressure gauge and the reactor discharge pressure gauge.
[0010] Optionally, it includes: a backwash pipeline and a bypass pipeline; wherein, both ends of the backwash pipeline are respectively connected to the chlorosilane feed pipeline and the chlorosilane discharge pipeline, and both ends of the bypass pipeline are respectively connected to the chlorosilane feed pipeline and the chlorosilane discharge pipeline; and the backwash pipeline port connected to the chlorosilane feed pipeline is closer to the fixed bed reactor than the bypass pipeline port, and the bypass pipeline port connected to the chlorosilane discharge pipeline is closer to the fixed bed reactor than the backwash pipeline port.
[0011] Optionally, it includes: a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve and an eighth valve;
[0012] Among them, the first valve is arranged on the chlorosilane feed pipeline and between the backwash pipeline port and the bypass pipeline port, the second valve is arranged on the chlorosilane feed pipeline and between the backwash pipeline port and the fixed bed reactor; the third valve is arranged on the chlorosilane discharge pipeline and between the bypass pipeline port and the fixed bed reactor, the fourth valve is arranged on the chlorosilane discharge pipeline and between the backwash pipeline port and the bypass pipeline port; the fifth valve is arranged on the bypass pipeline and close to the chlorosilane feed pipeline, the sixth valve is arranged on the backwash pipeline and close to the chlorosilane feed pipeline; the seventh valve is arranged on the bypass pipeline and close to the chlorosilane discharge pipeline, and the eighth valve is arranged on the backwash pipeline and close to the chlorosilane discharge pipeline.
[0013] Optionally, it includes: a third structural member formed by a Johnson net; wherein the third structural member is arranged at the lower end of the fixed bed reactor and is connected to a drain port installed on the outer side of the bottom of the fixed bed reactor.
[0014] Optionally, the third structural member is designed as a pipe with a gap, and the pipe is connected to the drain port.
[0015] Optionally, it includes: a feeding port provided at the top of the fixed bed reactor and connected to the upper layer of the first structural member.
[0016] Optionally, it includes: a discharge port arranged at the bottom of the fixed bed reactor and connected to the lower layer of the second structural member.
[0017] One embodiment of the aforementioned utility model has the following advantages or beneficial effects: This utility model provides a device for disproportionation of chlorosilanes. This device, through an internal Johnson mesh structure, intercepts impurities in the chlorosilanes, preventing them from entering the fixed bed and damaging the resin, thereby reducing the cost of raw and auxiliary materials. The Johnson mesh also evenly distributes the feed, ensuring full contact between the chlorosilanes and the resin, and preventing the disproportionated resin from escaping, thereby maximizing disproportionation efficiency. Furthermore, without stopping production, a reactor that has reached a high differential pressure can be backflushed to restore it to normal, ensuring proper fluid flow.
[0018] The further effects of the above-mentioned non-conventional optional manner will be described below in conjunction with specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings are provided to facilitate a better understanding of the present invention and do not constitute an undue limitation of the present invention.
[0020] Figure 1 1 is a schematic structural diagram of a device for disproportionation of chlorosilane according to an embodiment of the present invention;
[0021] Figure 2 This is a schematic structural diagram of a first structural member in a device for disproportionation of chlorosilane according to an embodiment of the present utility model;
[0022] Figure 3 1 is a schematic structural diagram of a second structural member in a device for disproportionation of chlorosilane according to an embodiment of the present utility model;
[0023] Figure 4 It is a top view of the third structural component structure used in the device for disproportionation of chlorosilane according to an embodiment of the present utility model. DETAILED DESCRIPTION
[0024] The following description of exemplary embodiments of the present invention is made in conjunction with the accompanying drawings, which include various details of the embodiments of the present invention to facilitate understanding. These details should be considered as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.
[0025] At least one embodiment of the present invention provides a device for disproportionation of chlorosilanes, such as Figure 1As shown, the apparatus for chlorosilane disproportionation may include a fixed-bed reactor 1, a first structural element 2, a second structural element 3, a chlorosilane feed line 4, and a chlorosilane discharge line 5. The fixed-bed reactor 1 is a reactor filled with granular solid catalyst or solid reactants, forming a stacked bed of a certain height. Gas or liquid flows through the interstices between the particles and through the stationary fixed bed, achieving a heterogeneous reaction process. This type of reactor is characterized by the stationary solid particles within the device, unlike moving beds and fluidized beds, where the solid material moves within the device. It is also called a packed bed reactor.
[0026] In this embodiment, the second structural member 3 is disposed at the lower portion of the fixed-bed reactor 1 and connected to the chlorosilane feed line 4. The first structural member 2 is disposed at the upper portion of the fixed-bed reactor 1 and connected to the chlorosilane discharge line 5. The first structural member 2 and the second structural member 3 are each designed to be formed by a Johnson mesh, which is used in petrochemical filtration equipment. Furthermore, the chlorosilane feed line 4 is mounted on the lower outer side of the fixed-bed reactor 1, and the chlorosilane discharge line 5 is mounted on the outer top of the fixed-bed reactor 1.
[0027] For example: In the initial state, chlorosilane is normally fed into the second structural component 3 through the chlorosilane feed pipeline 4 to isolate impurities, and then evenly distributed to fully contact with the resin in the fixed bed reactor 1. After sufficient contact, the chlorosilane is collected through the first structural component 2 and then enters the chlorosilane discharge pipeline 5 for normal discharge.
[0028] Therefore, the present invention evenly distributes the chlorosilane through the first structural member 2, ensuring that impurities do not directly contact the resin and that the chlorosilane and resin are in sufficient contact. The fully contacted chlorosilane is then collected by the second structural member 3 and enters the chlorosilane discharge line 5, preventing the resin from escaping. Specifically, the fixed-bed reactor 1 with the first structural member 2 and the second structural member 3 effectively intercepts impurities in the chlorosilane, preventing them from directly contacting the resin and damaging it, while also preventing the resin from escaping.
[0029] Preferred embodiments, such as Figure 1 As shown, the device for disproportionation of chlorosilane further includes a feed port 11 disposed at the top of the fixed bed reactor 1 and communicating with the upper layer of the first structural member 2. In other preferred embodiments, the device for disproportionation of chlorosilane further includes a discharge port 12 disposed at the bottom of the fixed bed reactor 1 and communicating with the lower layer of the second structural member 3.
[0030] As other embodiments of the present invention, Figure 2As shown, the first structural member 2 of the device for disproportionation of chlorosilane comprises a main pipe and a plurality of branch pipes. The main pipe is connected to the chlorosilane discharge pipe 5, and the plurality of branch pipes are arranged and connected to the main pipe, and the branch pipes are designed as a Johnson network. In a preferred embodiment, the plurality of branch pipes are evenly distributed and respectively connected to the main pipe. In a preferred embodiment, the chlorosilane discharge pipe 5 extends into the fixed bed reactor 1 and is vertically connected to the middle position of the main pipe (see Figure 2 In addition, the gap size of the branch pipe designed as the Johnson net is smaller than the resin size.
[0031] For example, the fully reacted material enters the first structural element 2 through a branch pipe designed as a Johnson net, achieving uniform distribution and separating the material from the resin. The material is then collected and discharged from the top of the fixed-bed reactor 1 via the chlorosilane discharge line 5. The specific number and connection locations of the branch pipes can be calculated based on actual flow rate, contact area, and other parameters. During backwashing, the material can be collected and discharged from the top of the fixed-bed reactor 1 to prevent the resin from escaping with the material.
[0032] In some other embodiments of the present invention, Figure 3 As shown, the second structural component 3 of the chlorosilane disproportionation device comprises a main pipe and multiple branch pipes. The main pipe is connected to the chlorosilane feed line 4, and the multiple branch pipes are arranged and connected to the main pipe, respectively. The branch pipes are designed as a Johnson net. In a preferred embodiment, the multiple branch pipes are evenly distributed and respectively connected to the main pipe. In a preferred embodiment, the chlorosilane feed line 4 is connected to the main pipe horizontally. In addition, the gap size of the branch pipes designed as a Johnson net is smaller than the resin size.
[0033] For example, the feed enters the main pipe from chlorosilane feed line 4. Branch pipes connected to the main pipe can evenly distribute the feed, ensuring sufficient contact between the feed and the resin. The specific number and connection positions of the branch pipes can be calculated based on actual flow rate, contact area, and other parameters.
[0034] In some further embodiments of the present invention, Figure 1 As shown, the device for disproportionation of chlorosilane includes a reactor feed pressure gauge 6, a reactor discharge pressure gauge 7, and a reactor differential pressure gauge 8. The reactor feed pressure gauge 6 is installed on the chlorosilane feed pipeline 4, the reactor discharge pressure gauge 7 is installed on the chlorosilane discharge pipeline 5, and the reactor differential pressure gauge 8 is installed between the reactor feed pressure gauge 6 and the reactor discharge pressure gauge 7.
[0035] In other embodiments, the device for chlorosilane disproportionation further includes a backwash line 13 and a bypass line 14, wherein both ends of the backwash line 13 are respectively connected to the chlorosilane feed line 4 and the chlorosilane discharge line 5, and both ends of the bypass line 14 are respectively connected to the chlorosilane feed line 4 and the chlorosilane discharge line 5, and the port of the backwash line 13 connected to the chlorosilane feed line 4 is closer to the fixed bed reactor 1 than the port of the bypass line 14, and the port of the bypass line 14 connected to the chlorosilane discharge line 5 is closer to the fixed bed reactor 1 than the port of the backwash line 13.
[0036] For example: when a large amount of chlorosilane impurities accumulate in the second structural member 3, the pressure of the reactor discharge pressure gauge 7 will decrease and the pressure difference of the reactor differential pressure gauge 8 will increase. Online backwashing can be performed through the bypass line 14 and the backwash line 13 to carry out the impurities in the second structural member 3 to the downstream, so that the reactor pressure difference returns to normal, ensuring production continuity and stability.
[0037] In a further embodiment, the device for disproportionation of chlorosilane includes a first valve 15, a second valve 16, a third valve 17, a fourth valve 18, a fifth valve 19, a sixth valve 20, a seventh valve 21, and an eighth valve 22. The first valve 15 is disposed on the chlorosilane feed line 4 between the port of the backwash line 13 and the port of the bypass line 14; the second valve 16 is disposed on the chlorosilane feed line 4 between the port of the backwash line 13 and the fixed bed reactor 1; the third valve 17 is disposed on the chlorosilane discharge line 4 between the port of the bypass line 14 and the fixed bed reactor 1; the fourth valve 18 is disposed on the chlorosilane discharge line 4 between the port of the backwash line 13 and the port of the bypass line 14; the fifth valve 19 is disposed on the bypass line 14 near the chlorosilane feed line 4; and the sixth valve 20 is disposed on the backwash line 13 near the chlorosilane feed line 4. The seventh valve 21 is disposed on the bypass line 14 and close to the chlorosilane discharge line 5 , and the eighth valve 21 is disposed on the backwash line 13 and close to the chlorosilane discharge line 5 .
[0038] For example: In the initial state, chlorosilane is normally fed into the second structural component 3 through the chlorosilane feed pipeline 4 to isolate impurities, and then evenly distributed to fully contact with the resin in the fixed bed reactor 1. The chlorosilane after sufficient contact is then collected by the first structural component 2 and enters the chlorosilane discharge pipeline 5 for normal discharge. At this time, the first valve 15, the second valve 16, the third valve 17, the fourth valve 18, the seventh valve 21 and the eighth valve 22 remain open, and the fifth valve 19 and the sixth valve 20 are closed, without passing through the bypass pipeline 14 and the backwash pipeline 13.
[0039] When a large amount of chlorosilane impurities accumulate in the second structural component 3, the pressure of the reactor discharge pressure gauge 7 will be reduced, and the pressure difference of the reactor differential pressure gauge 8 will be increased. Online backwashing can be performed through the bypass pipeline 14 and the backwash pipeline 13. Specifically: open the fifth valve 19 and the sixth valve 20, close the first valve 15 and the fourth valve 18, and allow chlorosilane to be fed through the chlorosilane feed pipeline 4 via the bypass pipeline 14. After passing through the first structural component 2 to isolate impurities, the chlorosilane is evenly distributed and fully contacted with the resin in the reactor. After sufficient contact, the chlorosilane is collected by the second structural component 3 and then enters the backwash pipeline 13 to be merged into the chlorosilane discharge pipeline 5 for normal discharge. After the impurities are taken out, the normal state can be restored.
[0040] When the pressure difference of the reactor differential pressure gauge 8 increases again, the first valve 15 and the fourth valve 18 can be opened, and the fifth valve 19 and the sixth valve 20 can be closed to discharge the impurities accumulated in the first structural member 2 and return the fixed bed reactor 1 to normal operation.
[0041] It should be noted that when chlorosilane disproportionation is not required through fixed-bed reactor 1, fifth valve 19 can be opened and first valve 15 closed, allowing chlorosilane discharge line 4 and bypass line 14 to flow directly into chlorosilane discharge line 5. When fixed-bed reactor 1 is to be put into use again, first valve 15 can be opened and fifth valve 19 closed to restore normal operation.
[0042] As some examples, Figure 1 As shown, it includes a third structural member 9 formed by a Johnson net, wherein the third structural member 9 is arranged at the lower end of the fixed bed reactor 1 and is connected to the drain port 10 installed on the outer side of the bottom of the fixed bed reactor 1.
[0043] Preferred embodiments, such as Figure 4 As shown, the third structural member 9 includes a pipe designed with a gap, and the pipe is connected to the drain port 10. In a preferred embodiment, the gap size of the third structural member 9 designed as a Johnson net is smaller than the size of the resin.
[0044] For example, when chlorosilane needs to be completely drained from the fixed-bed reactor 1, the resin can be isolated through the third structural member 9 and the chlorosilane can be drained to a safe location. When the resin needs to be replaced, the liquid chlorosilane is first drained to a safe location through the third structural member 9 and the drain port 10. Pure STC is then fully replaced through the third structural member 9 and the drain port 10. After fully drying and replacing the resin with hot nitrogen, the resin is discharged to a safe location through the discharge port after safety is confirmed.
[0045] It should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" may refer to fixed connections, detachable connections, or integral connections. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0046] The above specific embodiments do not limit the scope of protection of this utility model. Those skilled in the art will understand that various modifications, combinations, sub-combinations, and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model shall be included in the scope of protection of this utility model.
Claims
1. A device for disproportionation of chlorosilanes, characterized in that: It includes a fixed bed reactor, a first structural member, a second structural member, a chlorosilane feed pipeline and a chlorosilane discharge pipeline; Among them, the second structural member is arranged at the lower part of the fixed bed reactor and is connected to the chlorosilane feed pipeline; the first structural member is arranged at the upper part of the fixed bed reactor and is connected to the chlorosilane discharge pipeline; the first structural member and the second structural member are respectively designed to be formed by Johnson nets; and the chlorosilane feed pipeline is installed on the lower outer side of the fixed bed reactor, and the chlorosilane discharge pipeline is installed on the outer top of the fixed bed reactor.
2. The device for disproportionation of chlorosilane according to claim 1, characterized in that: The first structural member includes a main pipe and a plurality of branch pipes; Among them, the main pipe is connected to the chlorosilane discharge pipeline, and multiple branch pipes are arranged and connected to the main pipe, and the branch pipes are designed as Johnson network.
3. The device for disproportionation of chlorosilane according to claim 1, characterized in that: The second structural member includes a main pipe and a plurality of branch pipes; The main pipe is connected to the chlorosilane feed pipeline, and multiple branch pipes are arranged and connected to the main pipe, and the branch pipes are designed as Johnson networks.
4. The device for disproportionation of chlorosilane according to claim 1, characterized in that: include: Reactor feed pressure gauge, reactor discharge pressure gauge and reactor differential pressure gauge; Among them, the reactor feed pressure gauge is installed on the chlorosilane feed pipeline, the reactor discharge pressure gauge is installed on the chlorosilane discharge pipeline, and the reactor differential pressure gauge is installed between the reactor feed pressure gauge and the reactor discharge pressure gauge.
5. The device for disproportionation of chlorosilane according to claim 1, characterized in that: include: Backwash lines and bypass lines; Among them, the two ends of the backwash pipeline are respectively connected to the chlorosilane feed pipeline and the chlorosilane discharge pipeline, and the two ends of the bypass pipeline are respectively connected to the chlorosilane feed pipeline and the chlorosilane discharge pipeline; and the backwash pipeline port connected to the chlorosilane feed pipeline is closer to the fixed bed reactor than the bypass pipeline port, and the bypass pipeline port connected to the chlorosilane discharge pipeline is closer to the fixed bed reactor than the backwash pipeline port.
6. The device for disproportionation of chlorosilane according to claim 5, characterized in that: include: a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a seventh valve, and an eighth valve; Wherein, the first valve is arranged on the chlorosilane feed pipeline and between the backwash pipeline port and the bypass pipeline port, and the second valve is arranged on the chlorosilane feed pipeline and between the backwash pipeline port and the fixed bed reactor; The third valve is provided on the chlorosilane discharge pipeline and between the bypass pipeline port and the fixed bed reactor, and the fourth valve is provided on the chlorosilane discharge pipeline and between the backwash pipeline port and the bypass pipeline port; The fifth valve is arranged on the bypass line and is close to the chlorosilane feed line, and the sixth valve is arranged on the backwash line and is close to the chlorosilane feed line; The seventh valve is arranged on the bypass pipeline and is close to the chlorosilane discharge pipeline. The eighth valve is arranged on the backwash pipeline and is close to the chlorosilane discharge pipeline.
7. The device for disproportionation of chlorosilane according to claim 1, characterized in that: include: A third structural element formed by the Johnson network; The third structural member is arranged at the lower end of the fixed bed reactor and is communicated with the drain port installed on the outer side of the bottom of the fixed bed reactor.
8. The device for disproportionation of chlorosilane according to claim 7, characterized in that: include: The third structural member is designed as a pipe with a gap, and the pipe is connected to the drain port.
9. The device for disproportionation of chlorosilane according to claim 1, characterized in that: include: A feeding port is provided at the top of the fixed bed reactor and is communicated with the upper layer of the first structural member.
10. The device for disproportionation of chlorosilane according to any one of claims 1 to 9, characterized in that: include: A discharge port is provided at the bottom of the fixed bed reactor and is communicated with the lower layer of the second structural member.