Ash collector for synthesizing boron trichloride
By designing the ash collector during the synthesis of boron trichloride, and using the secondary filtration and filtration sintering net structure of the filter net and solid filler, the problems of ash blockage and pollution during the synthesis process are solved, and efficient dust removal effect and convenience are achieved equipment operation.
Patent Information
- Application Number
- CN202421075693.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-17
AI Technical Summary
During the synthesis of boron trichloride, the trace oxygen and moisture in the reaction system cause the ash produced easily blocks the pipelines and valves in the subsequent processes, causing contamination.
A collector including a filter tank and ash collection tank is designed, and the filter grid and solid filler are used for secondary filtration, combined with the filter sintered net and flare port structure to achieve effective collection and dust removal of ash and prevent blockage and contamination.
It realizes effective dust removal of boron trichloride gas, prevents ash from clogging the subsequent process, simplifies the equipment structure and use process, and facilitates disassembly and quickly loading of fillers and ash discharge.
Smart Images
Figure CN222286773U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of filtering equipment, in particular to an ash collector used for boron trichloride synthesis. Background Art
[0002] Boron trichloride is an inorganic compound with the chemical formula BCl3. It is a colorless fuming liquid or gas (toxic and non-flammable) with a strong irritating and acidic odor. It is easily deliquescent and can produce dense white smoke in humid air. It decomposes into hydrochloric acid and boric acid in water and decomposes into hydrochloric acid and boric acid ester in alcohol. Boron trichloride is mainly used as a doping source for semiconductor silicon or a catalyst for organic synthesis, and is also used for the preparation of high-purity boron. At present, boron carbide and chlorine are mainly used in China to prepare boron trichloride. The reaction formula is as follows:
[0003] (Exothermic)
[0004] Due to the presence of trace amounts of oxygen and moisture in the reaction system, the reaction will produce solid dust such as boric acid, boron oxide, carbon powder, and metal chloride in addition to boron trichloride. Therefore, if the boron trichloride gas produced during the synthesis process is not dusted, the ash produced during the reaction process will easily clog the pipelines and valves of subsequent processes and contaminate the product. Utility Model Content
[0005] In view of this, the purpose of the utility model is to provide an ash collector for boron trichloride synthesis with simple structure, easy use and good filtering effect, so as to prevent the ash generated in the reaction process from clogging the pipelines and valves of subsequent processes and contaminating the product.
[0006] The utility model is implemented by the following scheme: an ash collector for boron trichloride synthesis, comprising a silo, wherein the silo is divided into a filter pool located at the top and an ash collecting pool located at the bottom by a filter screen, the filter pool is filled with solid fillers supported by the filter screen, an air outlet pipe is connected to the upper side wall of the silo, a filter sintered net is provided on the upper part of the ash collecting pool, a spacing is left between the filter sintered net and the filter screen, and an air inlet pipe is connected to the lower side wall of the silo at a position lower than the filter sintered net.
[0007] Furthermore, the air inlet pipe extends into the ash collecting tank and is provided with a bent portion bent 90 degrees downward, and a bell mouth opening downward is provided at the lower end of the bent portion.
[0008] Furthermore, the silo is formed by connecting an upper cylinder shell and a lower cylinder shell, and KF flanges are provided at both ends of the upper cylinder shell and both ends of the lower cylinder shell. The filter screen is clamped between the KF flange at the lower end of the upper cylinder shell and the KF flange at the upper end of the lower cylinder shell, and the KF flange at the lower end of the upper cylinder shell and the KF flange at the upper end of the lower cylinder shell are connected together by a KF clamp.
[0009] Furthermore, the KF flange at the upper end of the upper cylinder shell and the KF flange at the lower end of the lower cylinder shell are respectively connected with KF blind plates through KF clamps.
[0010] Furthermore, the height of the air outlet pipe is higher than the height of the upper surface of the solid filler.
[0011] Compared with the prior art, the utility model has the following beneficial effects: the ash collector used for boron trichloride synthesis of the utility model has a simple structure, is easy to use, has a good filtering effect, can effectively remove dust from the boron trichloride gas generated in the synthesis process, and prevents the ash generated in the reaction process from clogging the pipelines and valves of subsequent processes and contaminating the product; and is easy to disassemble, and can realize rapid filling of fillers and rapid ash discharge.
[0012] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through specific embodiments and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;
[0014] Explanation of the numbers in the figure: 1-filter tank, 2-ash collecting tank, 3-inlet pipe, 4-outlet pipe, 5-filter sintered mesh, 6-filter mesh, 7-solid filler, 8-KF blind plate. DETAILED DESCRIPTION
[0015] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.
[0016] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0017] like Figure 1As shown, an ash collector for boron trichloride synthesis includes a silo, which is divided into a filter pool 1 located above and an ash collection pool 2 located below by a filter screen 6. The filter pool 1 is filled with a solid filler 7 supported by the filter screen, and the solid filler 7 is used to filter solid particles in the boron trichloride gas, playing a secondary filtering role. The ash collection pool is used to collect the filtered ash. The upper side wall of the silo is connected to an outlet pipe 4, and a filter sintered mesh 5 is provided on the upper part of the ash collection pool. There is a gap between the filter sintered mesh and the filter screen, and the lower side wall of the silo is connected to an inlet pipe 3 at a position lower than the filter sintered mesh. The filter sintered mesh is located near the upper outlet of the ash collection pool, playing a primary filtering and ash blocking role. There is a certain space between the filter sintered mesh and the filter screen, which plays a buffering role.
[0018] The solid filler includes quartz sand, activated carbon, ceramic particles, stainless steel filler rings, etc., and can also be a mixture of one or more of these fillers.
[0019] In this embodiment, the air inlet pipe 3 extends into the ash collecting tank and is provided with a bent portion bent 90 degrees downward, and a bell mouth opening downward is provided at the lower end of the bent portion. The outlet end of the air inlet pipe adopts an inverted bell mouth, which can effectively reduce dust.
[0020] In this embodiment, the silo is formed by connecting an upper cylinder shell and a lower cylinder shell, and KF flanges are provided at both ends of the upper cylinder shell and the lower cylinder shell. The filter screen adopts a KF vacuum filter screen, and the filter screen is clamped between the KF flange at the lower end of the upper cylinder shell and the KF flange at the upper end of the lower cylinder shell. The KF flange at the lower end of the upper cylinder shell and the KF flange at the upper end of the lower cylinder shell are connected together by a KF clamp, and the filter tank and the ash collecting tank are connected in the form of a KF quick connection for easy disassembly.
[0021] In this embodiment, the KF flange at the upper end of the upper cylinder shell and the KF flange at the lower end of the lower cylinder shell are respectively connected with a KF blind plate 8 through a KF clamp; the upper end of the silo is sealed in the form of a KF quick connection, which can realize rapid filling of fillers; the lower end of the silo is sealed in the form of a KF quick connection, which can realize rapid ash discharge.
[0022] In this embodiment, the height of the air outlet pipe is higher than the height of the upper surface of the solid filler, and the operating pressure of the ash collector does not exceed 0.1 MPa.
[0023] The method of using the ash collector is as follows: the filter sintered mesh 5 is placed in the ash collecting pool 2; the filter mesh 6 is placed at the upper end of the ash collecting pool 2, and the filter pool 1 is connected to the ash collecting pool 2 with a KF clamp; solid filler is poured from the top of the filter pool 1; the KF clamp seals the KF blind plate with the filter pool 1 and the ash collecting pool 2; the air inlet pipe 3 and the air outlet pipe 4 are connected to the system pipeline, and nitrogen is first used to purge and remove the moisture and oxygen inside the ash collector; the boron trichloride gas enters the ash collector through the air inlet pipe 3, and the inverted bell mouth of the air inlet pipe 3 sprays the gas onto the pipe wall of the ash collecting pool 2, which can effectively reduce dust; when the upward air flow passes through the filter sintered mesh 5, most of the ash is filtered and blocked, and then falls into the bottom of the ash collecting pool 2 and is collected; the filter mesh 6 and the solid filler 7 filter a small amount of ash, and the boron trichloride gas without ash will be discharged from the air outlet pipe 4 and enter the next process. When the ash collecting pool 2 is full of ash, the KF blind plate at the bottom can be removed for rapid ash discharge.
[0024] Unless otherwise stated, any technical solution disclosed in the above utility model, if it discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any technician in the field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many feasible numerical values. Since there are too many numerical values to be exhaustive, the utility model discloses only some numerical values to illustrate the technical solution of the utility model, and the numerical values listed above should not constitute a limitation on the scope of protection of the utility model.
[0025] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).
[0026] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.
[0027] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated molding process.
[0028] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.
Claims
1. An ash collector for boron trichloride synthesis, characterized in that: It includes a silo, which is divided into a filter pool located above and an ash collecting pool located below by a filter screen, the filter pool is filled with solid filler supported by the filter screen, the upper side wall of the silo is connected with an air outlet pipe, a filter sintered mesh is provided on the upper part of the ash collecting pool, a distance is left between the filter sintered mesh and the filter screen, and the lower side wall of the silo is connected with an air inlet pipe at a position lower than the filter sintered mesh.
2. The ash collector for boron trichloride synthesis according to claim 1, characterized in that: The air inlet pipe extends into the ash collecting tank and is provided with a bent portion bent 90 degrees downward, and a bell mouth opening downward is provided at the lower end of the bent portion.
3. The ash collector for boron trichloride synthesis according to claim 1, characterized in that: The silo is formed by connecting an upper shell and a lower shell, and both ends of the upper shell and the lower shell are provided with KF flanges. The filter screen is clamped between the KF flange at the lower end of the upper shell and the KF flange at the upper end of the lower shell, and the KF flange at the lower end of the upper shell and the KF flange at the upper end of the lower shell are connected together by a KF clamp.
4. The ash collector for boron trichloride synthesis according to claim 3, characterized in that: The KF flange at the upper end of the upper cylinder shell and the KF flange at the lower end of the lower cylinder shell are respectively connected with KF blind plates through KF clamps.
5. The ash collector for boron trichloride synthesis according to claim 1, characterized in that: The height of the air outlet pipe is higher than the height of the upper surface of the solid filler.