A large particle pre-separation dust removal device
By integrating a cyclone separator and a conical ash hopper into the dust collector, the problems of large footprint and high energy consumption of baghouse dust collectors in trichlorosilane production are solved, achieving a highly efficient and compact dust separation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGXIA FUTAI SILICON IND CO LTD NEW MATERIALS BRANCH
- Filing Date
- 2025-06-11
- Publication Date
- 2026-07-03
AI Technical Summary
In the current trichlorosilane production process, bag filters have the problems of large footprint and high energy consumption. Although cyclone separators can partially solve these problems, their independent layout requires a large footprint and their energy consumption remains high.
The cyclone separator is placed on the side wall of the air inlet of the dust collector, and the discharge port of the cyclone separator is oriented towards the adjacent filter bag assembly to achieve tiered separation of dust. The cyclone separator is partially or completely embedded in the dust collector, and the dust separation path is optimized by combining the conical ash hopper and baffle design.
This reduces the risk of physical damage and clogging to the filter bags, decreases the frequency of dust removal and energy consumption, and achieves a compact and efficient dust removal system.
Smart Images
Figure CN224442527U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of trichlorosilane production technology, specifically to a dust removal device for pre-separation of large particles. Background Technology
[0002] In the industrial process of producing trichlorosilane, a large amount of associated dust is inevitably generated. This dust mainly consists of unreacted silicon powder, silicon oxide, and other impurity particles. The particle size distribution of this dust is usually wide, including both large particles that are easy to settle and a large number of fine particles that are well suspended.
[0003] Currently, baghouse dust collectors are widely used in the industry as the final dust removal equipment for trichlorosilane synthesis furnaces, relying on the interception effect of fiber filter bags to achieve gas-solid separation. However, when larger particles enter the baghouse dust collector, they can cause increased resistance to gas flow through the filter bags due to adsorption or impact on the filter bag surface, leading to a significant increase in energy consumption. Furthermore, the repeated friction between large particles and the filter bag fibers, as well as the mechanical impact during backflushing cleaning, accelerates the wear and damage of the filter bag surface fibers. To address these issues, existing technologies propose connecting a cyclone separator in series before the baghouse dust collector to pre-separate large dust particles, thereby reducing the load on the downstream filter bags.
[0004] However, the application of cyclone separators also has significant limitations. Cyclone separators are typically large in size, requiring considerable floor space and height, posing installation and layout challenges for production lines with limited factory space or requiring a compact layout. Furthermore, for dust with a low content of large particles, cyclone separators still need to maintain a high airflow velocity to generate sufficient centrifugal force for separation, consuming significant fan power and resulting in high energy consumption for the entire dust removal system. Utility Model Content
[0005] The purpose of this invention is to provide a dust removal device for pre-separation of large particles, which can solve the problems of high space requirements and high energy consumption of existing dust removal devices.
[0006] This application is achieved through the following technical solution, specifically:
[0007] A dust removal device for pre-separation of large particles, characterized in that it comprises: a dust removal box, an air inlet opened on the side wall of the dust removal box, an exhaust port opened on the upper part of the dust removal box, a cyclone separator disposed at the air inlet of the dust removal box, a filter bag assembly installed inside the dust removal box, a discharge port opened at the bottom of the dust removal box, and a rotary valve disposed at the discharge port.
[0008] The cyclone separator has a feed inlet on one side, and a first discharge outlet and a second discharge outlet on the other side and at the bottom, respectively. The first discharge outlet faces the filter bag assembly, and the second discharge outlet is connected to the bottom of the dust collector.
[0009] In this design, a cyclone separator is positioned on the side wall of the dust collector housing's inlet, with the inlet directly connected to the separator's feed inlet. The first discharge port at the top of the cyclone separator is oriented towards the adjacent filter bag assembly, enabling efficient, tiered dust separation within a single dust collector housing. This solution overcomes the space constraints of independently arranged cyclone separators and mitigates the risk of physical damage and clogging to the filter bags through a pre-separation mechanism, reducing cleaning frequency and energy consumption, thus achieving a compact and efficient dust collection system.
[0010] As an improvement of the cyclone separator in this application, the cyclone separator is fixed to the outside of the side wall of the dust collector and is tightly fitted to the outer wall of the dust collector.
[0011] As another improvement to the cyclone separator in this application, the cyclone separator is partially embedded in the side wall of the dust collection box.
[0012] Furthermore, the bottom of the dust collector is provided with a conical ash hopper, and a material collection port is opened on the side of the ash hopper. The material collection port is sealed and connected to the second discharge port of the cyclone separator through a flexible connector, and the discharge port is located at the lower conical corner of the ash hopper.
[0013] As another improvement to the cyclone separator in this application, the cyclone separator is installed inside the dust collection box and fixed to the inner wall of the dust collection box.
[0014] Furthermore, the bottom of the dust collector is provided with a conical ash hopper, the cone angle of which is offset towards the lower part of the filter bag assembly, and the discharge port is located at the lower cone angle of the ash hopper.
[0015] Furthermore, a baffle plate is connected to the lower part of the outer wall of the cyclone separator, and the baffle plate extends obliquely from the cyclone separator toward the filter bag assembly.
[0016] As another improvement of the cyclone separator in this application, the cyclone separator includes a cylinder and a cone, the inlet and the first outlet are both tangentially opened on the side wall of the cylinder, and the second outlet is disposed at the lower end of the cone.
[0017] The beneficial effects of this application are as follows:
[0018] The proposed solution involves placing a cyclone separator on the side wall of the dust collector housing's air inlet. The air inlet on the side wall of the dust collector housing is directly connected to the cyclone separator's feed inlet. The first discharge port at the top of the cyclone separator is oriented towards the adjacent filter bag assembly, enabling efficient, stepped separation of dust within a single dust collector housing. This solution overcomes the space constraints of independently arranged cyclone separators and mitigates the risk of physical damage and clogging to the filter bags through a pre-separation mechanism, reducing cleaning frequency and energy consumption, thus achieving a compact and efficient dust collection system.
[0019] In addition to the technical problems solved by this utility model, the technical features constituting the technical solution, and the advantages brought about by the technical features of these technical solutions as described above, other technical problems that this utility model can solve, other technical features contained in the technical solution, and the advantages brought about by these technical features will be further explained in detail with reference to the accompanying drawings. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of a dust removal device for pre-separation of large particles in an embodiment of this application;
[0021] Figure 2 yes Figure 1 A cross-sectional structural diagram of the dust removal device in the embodiment;
[0022] Figure 3 This is a schematic diagram of a dust removal device for pre-separation of large particles according to another embodiment of this application;
[0023] Figure 4 This is a cross-sectional structural schematic diagram of a dust removal device for pre-separation of large particles according to another embodiment of this application.
[0024] Explanation of reference numerals in the attached figures:
[0025] 1. Dust collector housing; 2. Cyclone separator; 3. Filter bag assembly; 4. Rotary valve; 11. Air inlet; 12. Exhaust outlet; 13. Discharge outlet; 14. Dust hopper; 21. Feed inlet; 22. First discharge outlet; 23. Second discharge outlet; 24. Cylinder; 25. Cone; 26. Baffle plate; 141. Collection port; 142. Flexible connector. Detailed Implementation
[0026] The following will be combined with the appendix Figures 1-4 The embodiments of the technical solution of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.
[0027] In view of the problems existing in the background technology or products, Figure 1 This paper shows a schematic diagram of a dust removal device for large particle pre-separation according to an embodiment of the present application. Figure 2 It shows Figure 1 A cross-sectional structural diagram of a dust removal device. (See attached diagram.) Figure 1 and 2 As shown, this application embodiment provides a dust removal device for pre-separation of large particles, including: a dust removal box 1, an air inlet 11 opened on the side wall of the dust removal box 1, an exhaust port 12 opened on the upper part of the dust removal box 1, a cyclone separator 2 disposed at the air inlet 11 of the dust removal box 1, a filter bag assembly 3 installed inside the dust removal box 1, a discharge port 13 opened at the bottom of the dust removal box 1, and a rotary valve 4 disposed at the discharge port 13;
[0028] The cyclone separator 2 has a feed inlet 21 on one side, and a first discharge port 22 and a second discharge port 23 on the other side and at the bottom, respectively. The first discharge port 22 is opened towards the filter bag assembly 3, and the second discharge port 23 is connected to the bottom of the dust collector 1.
[0029] Specifically, the dust collector housing 1 has a rectangular structure. A cyclone separator 2 is installed at the air inlet 11 on the side wall of the dust collector housing 1, allowing the dust-laden airflow to enter the cyclone separator 2 through the air inlet 11. Inside the cyclone separator 2, the airflow rotates at high speed, using centrifugal force to separate large dust particles. Large dust particles are discharged to the bottom of the dust collector housing 1 through the second discharge port 23 and periodically discharged to the outside of the dust collector housing 1 through a rotary valve 4. Finer dust particles rise with the airflow and are discharged from the first discharge port 22 at the top of the cyclone separator 2 back into the dust collector housing 1. The filter bag assembly 3 consists of multiple filter bags made of suitable filter materials, such as wear-resistant and high-temperature-resistant fiber materials. When the dust-laden airflow passes through the filter bag assembly 3, fine dust is adsorbed by the filter bags, and clean gas is discharged from the exhaust port 12 at the top of the dust collector housing 1. Optionally, the filter bag assembly 3 also includes a pulse backflushing structure located above the filter bags to periodically remove dust adhering to the surface of the filter bags, maintaining good filtration efficiency.
[0030] Figure 3 A schematic diagram of a dust removal device for large particle pre-separation according to another embodiment of this application is shown. Figure 3 As shown, in one implementation, the cyclone separator 2 is fixed to the outside of the side wall of the dust collector 1 and is tightly fitted to the outer wall of the dust collector 1.
[0031] Specifically, this installation method is designed to achieve pre-separation of the dust-laden airflow without occupying too much space inside the dust collector housing 1. The first discharge port 22 of the cyclone separator 2 is sealed to the air inlet 11 of the dust collector housing 1, thereby discharging the pre-separated dust-laden airflow from the first discharge port 22 to the filter bag assembly 3. The outer wall of the dust collector housing 1 can be fixed to the cyclone separator 2 using fasteners (such as triangular brackets) to ensure a tight fit between the cyclone separator 2 and the outer wall of the dust collector housing 1.
[0032] Continue reading Figure 1 and 2 In one implementation, the cyclone separator 2 is partially embedded in the side wall of the dust collection box 1.
[0033] Specifically, the partial embedding method allows for a more compact integration of the cyclone separator 2 and the dust collector housing 1, further saving space. Simultaneously, this method reduces the connection length between the air inlet 11 and the first outlet 22 of the dust collector housing 1, lowering resistance during airflow transmission and improving the efficiency of airflow entering the cyclone separator 2. The gap between the embedded portion of the cyclone separator 2 and the embedding groove on the side wall of the dust collector housing 1 needs to be matched and sealed to prevent airflow leakage. The outer wall surface of the dust collector housing 1 is also equipped with annular clamps that cooperate with the non-embedded portion of the cyclone separator 2, providing additional structural protection for the cyclone separator 2.
[0034] Preferably, the dust collector 1 has a conical ash hopper 14 at the bottom, and a material collection port 141 is provided on the side of the ash hopper 14. The material collection port 141 is sealed and connected to the second discharge port 23 of the cyclone separator 2 through a flexible connector 142. The discharge port 13 is located at the lower cone angle of the ash hopper 14.
[0035] Specifically, when part of the cyclone separator 2 is tightly fitted to or embedded in the side wall of the dust collector 1, the second discharge port 23 is connected to the collection port 141 opened on the side wall of the conical ash hopper 14 via a flexible connector 142 (such as a corrugated pipe), forming an independent discharge channel for large particles of dust captured by the cyclone separator 2, reducing disturbance to the dust at the bottom of the dust collector 1, and optimizing the recycling of materials.
[0036] Figure 4 A cross-sectional structural schematic diagram of a dust removal device for large particle pre-separation according to another embodiment of this application is shown. Figure 4 As shown, in one implementation, the cyclone separator 2 is installed inside the dust collector 1 and fixed to the inner wall of the dust collector 1.
[0037] Specifically, the cyclone separator 2 is installed inside the dust collector 1 and fixed to the inner wall of the dust collector 1 by fasteners (such as welding brackets). The feed inlet 21 of the cyclone separator 2 is directly connected to the air inlet 11 on the side wall of the dust collector 1.
[0038] Preferably, the bottom of the dust collector 1 is provided with a conical ash hopper 14, the cone angle of the ash hopper 14 is offset towards the lower part of the filter bag assembly 3, and the discharge port 13 is provided at the lower cone angle of the ash hopper 14.
[0039] Specifically, by shifting the cone angle of the ash hopper 14 and the discharge port 13 towards the lower part of the filter bag assembly 3, the fine dust falling from the filter bag assembly 3, which is typically larger in quantity and prone to accumulation, can be collected more effectively. Simultaneously, the larger particles separated by the cyclone separator 2 slide slowly along the longer inclined surface of the ash hopper 14 to the discharge port 13 due to gravity, reducing secondary dust re-entrainment at the bottom of the dust collector 1 and further reducing the dust load on the filter bag assembly 3. Preferably, the inner wall of the ash hopper 14 is also provided with a wear-resistant liner to extend its service life.
[0040] Preferably, a baffle plate 26 is connected to the lower part of the outer wall of the cyclone separator 2, and the baffle plate 26 extends obliquely from the cyclone separator 2 toward the filter bag assembly 3. The baffle plate 26 is used to block large dust particles rebounding from the side wall of the dust collector 1, and guides the intercepted particles downward along the slope to the bottom of the collector 1, so as to prevent dust from short-circuiting and impacting the filter bag assembly 3.
[0041] In one implementation, the cyclone separator 2 includes a cylinder 24 and a cone 25. The inlet 21 and the first outlet 22 are both tangentially opened on the side wall of the cylinder 24, and the second outlet 23 is disposed at the lower end of the cone 25.
[0042] Specifically, the first outlet 22 is configured as a tangential outlet facing the filter bag assembly 3, which allows the pre-separated airflow to maintain a certain tangential momentum when leaving the cyclone separator 2, thus flowing more smoothly and steadily towards the adjacent filter bag assembly 3. This design reduces abrupt changes in airflow direction, thereby reducing local resistance loss and airflow turbulence, and helps the airflow to be evenly distributed within the filter bag assembly 3, improving the filtration efficiency and service life of the filter bag.
[0043] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set", "equipped with", "connected", and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.
[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A large particle pre-separation dust extraction device, characterised in that, include: The dust collector housing (1), the air inlet (11) opened on the side wall of the dust collector housing (1), the exhaust port (12) opened on the upper part of the dust collector housing (1), the cyclone separator (2) set at the air inlet (11) of the dust collector housing (1), the filter bag assembly (3) installed inside the dust collector housing (1), the discharge port (13) opened at the bottom of the dust collector housing (1), and the rotary valve (4) set at the discharge port (13); The cyclone separator (2) has an inlet (21) on one side, and a first outlet (22) and a second outlet (23) on the other side and at the bottom, respectively. The first outlet (22) is opened towards the filter bag assembly (3), and the second outlet (23) is connected to the bottom of the dust collector (1).
2. The dust extraction device of claim 1, wherein The cyclone separator (2) is fixed to the outside of the side wall of the dust collector (1) and is tightly fitted to the outer wall of the dust collector (1).
3. The dust extraction device of claim 1, wherein The cyclone separator (2) is partially embedded in the side wall of the dust collection box (1).
4. The dust extraction device of claim 1, wherein The cyclone separator (2) is installed inside the dust collector (1) and fixed to the inner wall of the dust collector (1).
5. The dust extraction device of claim 2 or 3, wherein The dust collector (1) has a conical ash hopper (14) at the bottom. The ash hopper (14) has a material collection port (141) on its side. The material collection port (141) is sealed and connected to the second discharge port (23) of the cyclone separator (2) through a flexible connector (142). The discharge port (13) is located at the lower cone angle of the ash hopper (14).
6. The dust extraction device of claim 4, wherein The dust collector (1) has a conical ash hopper (14) at the bottom. The cone angle of the ash hopper (14) is offset towards the lower part of the filter bag assembly (3). The discharge port (13) is located at the lower cone angle of the ash hopper (14).
7. The dust extraction device of claim 4, wherein A baffle plate (26) is connected to the lower part of the outer wall of the cyclone separator (2), and the baffle plate (26) extends obliquely from the cyclone separator (2) toward the filter bag assembly (3).
8. The dust extraction device of claim 1, wherein, The cyclone separator (2) includes a cylinder (24) and a cone (25). The feed inlet (21) and the first discharge outlet (22) are both tangentially opened on the side wall of the cylinder (24), and the second discharge outlet (23) is located at the lower end of the cone (25).