Fluidized bed air inlet structure with vibration device

Abstract

The application relates to the field of fluidized beds, in particular to a fluidized bed air inlet structure with a vibrating device, which comprises a fluidized bed cylinder, the cylinder comprises, from top to bottom, an upper expansion section, a middle cylinder section and a lower cone section, the bottom of the lower cone section is provided with a bottom total air inlet, a communication pipe is arranged above the bottom total air inlet, the upper part of the communication pipe is closed, at least one oblique air outlet pipe is arranged on the pipe wall in an oblique manner, and the oblique air outlet pipes are consistent in direction; a guide sleeve is sleeved outside the communication pipe, the inner diameter of the guide sleeve is larger than the outer diameter of the communication pipe, and an annular space is formed between the guide sleeve and the communication pipe; a plurality of bypass holes are arranged on the communication pipe close to the bottom, and the positions of the bypass holes are lower than the lower end of the guide sleeve. The application can effectively reduce the problem of material accumulation.

Description

Technical Field

[0001] This invention relates to the field of fluidized beds, specifically a fluidized bed air inlet structure with a vibration device. Background Technology

[0002] Organosilicon fluidized bed reactors are devices that generate methyl monomers through the reaction of silicon powder, copper powder, and chloromethane gas within the reactor. The reaction requires a high temperature of approximately 300°C and releases a significant amount of heat. In existing technologies, fluidized beds typically employ gas distribution plates to achieve uniform gas distribution, but this suffers from problems such as flow deviation, channeling, material leakage, and blockage, reducing gas-solid mass transfer efficiency. Furthermore, waste material tends to accumulate at the bottom during unloading, impacting efficiency. While side-swirling gas inlet methods can improve distribution, it is difficult to form a swirling flow in time in the more vigorous middle and lower sections of the reaction, leading to uneven distribution.

[0003] Therefore, there is an urgent need for a device that can simultaneously optimize air intake and unloading. Summary of the Invention

[0004] The purpose of this invention is to provide a fluidized bed air intake structure with a vibration device. When in use, the device utilizes the annular gap space between the guide sleeve and the connecting pipe to create a low-pressure environment through the upward flow velocity of the outlet, thereby generating suction to draw up the solid material below. The material then spirals upward with the gas and is distributed. This solves the problems of flow deviation and channeling caused by the current gas distribution plate. By blowing air through the bypass hole, the accumulated material at the bottom is flushed up, and the air intake vibration device further reduces the accumulation of material in the lower conical section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A fluidized bed air intake structure with a vibration device includes a fluidized bed cylinder, which comprises, from top to bottom, an upper enlarged section, a middle cylinder section, and a lower conical section. The lower conical section has a bottom main air inlet at its bottom, and a connecting pipe is disposed above the bottom main air inlet. The upper part of the connecting pipe is closed, and at least one obliquely oriented air outlet is disposed on the pipe wall, with all oblique air outlets facing the same direction. A guide sleeve is fitted around the connecting pipe, the inner diameter of which is larger than the outer diameter of the connecting pipe, forming an annular gap between them. Multiple bypass holes are provided near the bottom of the connecting pipe, and the bypass holes are positioned below the lower end of the guide sleeve. The lower conical section also has an air intake vibration device that generates vibration by changing the air intake frequency. The middle cylinder section has at least one set of side-rotating air intake devices.

[0006] As a further embodiment of the present invention: the inclination angle of the oblique exhaust pipe is 30~60°, and it is evenly distributed around the connecting pipe.

[0007] As a further embodiment of the present invention: the bypass holes are uniformly arranged along the circumference of the connecting pipe, the axis of the bypass holes is perpendicular to the axis of the connecting pipe, and the diameter of the holes is 0.1-0.2 times the inner diameter of the connecting pipe.

[0008] As a further embodiment of the present invention: the air intake vibration device includes an air guide pipe, which is inserted and fixed to the outer wall. A limiting ring A is fixed to the outer wall of the air outlet of the air guide pipe, and a limiting ring B is fixed to the outer wall of the bottom of the pipe located inside the lower conical section. A vibration ring is sleeved on the air guide pipe and can slide along the air guide pipe. A sealing plate is connected to the top of the vibration ring through a connecting rod A. The diameter of the sealing plate is larger than the diameter of the air guide pipe. A spring is connected between the vibration ring and the limiting ring B.

[0009] As a further aspect of the present invention: under normal conditions, the sealing plate covers the air outlet of the air duct, and the spring is in its original state or in a slightly stretched state.

[0010] As a further embodiment of the present invention: the cross-section of the sealing plate is arc-shaped, and the radius of curvature of the arc-shaped protrusion at the top of the sealing plate is 1.2-1.5 times the diameter of the sealing plate.

[0011] As a further embodiment of the present invention: the side-rotating air intake device includes multiple side-rotating air intake pipes, which are obliquely inserted and uniformly fixed to the middle cylindrical section, and the included angle between the vertical planes of the side-rotating air intake pipes is 30~55°.

[0012] As a further embodiment of the present invention, the ratio of the inner diameter of the guide sleeve to the outer diameter of the connecting pipe is 1.2:1 to 1.5:1.

[0013] As a further embodiment of the present invention: the guide sleeve is fixedly connected to the connecting pipe via a connecting rod B.

[0014] As a further embodiment of the present invention: the connecting pipe is detachably and fixedly connected to the main air inlet of the lower conical section.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This device eliminates the need for a gas distribution plate, improving the space utilization of the organosilicon fluidized bed. By adding a connecting pipe to the main inlet pipe at the bottom of the fluidized bed, and then installing an angled outlet pipe on the connecting pipe, along with a guide sleeve on the outside, the incoming gas becomes a swirling flow. Simultaneously, utilizing the annular space between the two, a low-pressure environment is created at the top outlet velocity, generating suction that lifts up the solid material below, causing it to spiral upwards with the gas. Meanwhile, in the middle cylindrical section... When the spiral upward force decreases, the side-swirling air intake device further provides the upward spiral force, enabling uniform distribution of materials in the middle and lower sections where the reaction is most intense, thus improving mass transfer efficiency. At the same time, the bypass hole on the connecting pipe can blow air to the bottom accumulated material. The air intake vibration device can agitate the solid materials in the lower cone section during the reaction, accelerating the material's entry into the fluidized state in the fluidized bed and improving reaction efficiency. After the reaction is completed, the vibration loosens the waste material left by the reaction, accelerating the unloading efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly of the organosilicon fluidized bed of the present invention; Figure 2 This is a schematic diagram of the upper enlarged section structure of the present invention; Figure 3 This is a schematic diagram of the middle cylindrical section of the present invention; Figure 4 This is a schematic diagram of the installation of the lower cone of the present invention; Figure 5 This is a schematic diagram of the connecting pipe structure of the present invention; Figure 6 This is a schematic diagram of the air intake vibration device of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0019] Please see Figures 1-6In this embodiment of the invention, a fluidized bed air inlet structure with a vibration device includes a fluidized bed cylinder. The cylinder comprises, from top to bottom, an upper enlarged section 10, a middle cylinder section 20, and a lower conical section 30. The lower conical section 30 has a bottom main air inlet 301 at its bottom. A connecting pipe 302 is disposed above the bottom main air inlet 301. The upper part of the connecting pipe 302 is closed, and at least one obliquely oriented air outlet pipe 303 is disposed on the pipe wall. The oblique air outlet pipes 303 all face the same direction. A guide is sleeved on the outside of the connecting pipe 302. The guide sleeve 304 has an inner diameter larger than the outer diameter of the connecting pipe 302, forming an annular gap between them. The connecting pipe 302 is provided with multiple bypass holes 3021 near the bottom, and the position of the bypass holes 3021 is lower than the lower end of the guide sleeve 304. The lower conical section 30 is also provided with an air intake vibration device 40, which generates vibration by changing the air intake frequency. The middle cylindrical section 20 is provided with at least one set of side-rotating air intake devices 201, and the inclined air outlet pipe 303 has an inclination angle of 30~60° and is evenly distributed around the connecting pipe 302. The bypass hole 3021 is evenly arranged along the circumference of the connecting pipe 302. The axis of the bypass hole 3021 is perpendicular to the axis of the connecting pipe 302, and the diameter of the hole is 0.1-0.2 times the inner diameter of the connecting pipe 302. The side-rotating air intake device 201 includes multiple side-rotating air intake pipes. The side-rotating air intake pipes are obliquely inserted and evenly fixed to the middle cylindrical section 20. The included angle between the vertical planes of the side-rotating air intake pipes is 30-55°. The ratio of the inner diameter of the guide sleeve 304 to the outer diameter of the connecting pipe 302 is 1.2:1-1.5:1. The guide sleeve 304 is fixedly connected to the connecting pipe 302 by a connecting rod B3041. The connecting pipe 302 is detachably fixedly connected to the main air inlet of the lower conical section 30 by bolts. The connecting pipe 302 is connected by bolts for easy disassembly and unloading.

[0020] like Figure 2 As shown, the upper enlarged section 10 includes a solid material inlet, a product outlet 101, and a liquid return port 102. After the reaction, the gas is discharged from the outlet 101, and the entrained silicon powder particles can be recycled through the liquid return port 102.

[0021] Specifically, solid materials enter through inlet 101 and accumulate in the bed body; gas enters through the main inlet 301 and enters the cylinder through the connecting pipe 302, and is then ejected by six evenly arranged oblique outlet pipes 303, impacting the inner wall of the guide sleeve 304 to generate a spiral airflow. The high-speed gas flow creates low pressure, sucking up the material and causing it to spiral upward. The gas is ejected through six horizontally arranged bypass holes 3021 to agitate the deposited material. The gas then enters through the side-swirling inlet device 201, forming a spiral upward airflow to improve the uniformity of distribution. During use, the gas enters the gas vibration device 5 by changing the inlet frequency. The inlet frequency can be controlled by controlling the opening and closing frequency of the electromagnetic switch connected to it. The specific technical means are not detailed here. This generates vibration, which loosens the material covering the cylinder wall, thereby improving the reaction efficiency.

[0022] To improve the vibration effect, as a further embodiment of the present invention: the air intake vibration device 40 includes an air guide pipe 401, which is inserted and fixed to the outer wall. A limit ring A402 is fixed to the outer wall of the air outlet of the air guide pipe 401, and a limit ring B403 is fixed to the outer wall of the bottom of the pipe located inside the lower conical section 30. A vibration ring 404 is sleeved on the air guide pipe 401 and can slide along the air guide pipe 401. A sealing plate 405 is connected to the top of the vibration ring 404 through a connecting rod A. The diameter of the sealing plate 405 is larger than the diameter of the air guide pipe 401. A spring 406 is connected between the vibration ring 404 and the limit ring B403. Below, the sealing plate 405 covers the air outlet of the air guide pipe 401, and the spring 406 is in its original state or slightly stretched state. In this way, when the gas enters from the air guide pipe 401, it impacts the sealing plate 405, causing the vibrating ring 404 to repeatedly hit the limiting ring A under the action of the gas and the spring 406, thereby shaking off the material. Furthermore, by making the cross-section of the sealing plate 405 into an arc shape, the radius of curvature of the arc-shaped protrusion at the top of the sealing plate 405 is 1.2-1.5 times the diameter of the sealing plate 405. The arc-shaped sealing plate allows the incoming gas to impact the sealing plate 405 before being blown down to the inner wall of the lower conical section 3, making the material easier to loosen and less prone to accumulation.

[0023] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fluidized bed air inlet structure with a vibration device, comprising a fluidized bed cylinder, characterized in that: The cylinder comprises, from top to bottom, an upper enlarged section (10), a middle cylinder section (20), and a lower conical section (30). The lower conical section (30) has a bottom main air inlet (301) at its bottom. A connecting pipe (302) is positioned above the bottom main air inlet (301). The upper part of the connecting pipe (302) is closed, and at least one obliquely oriented air outlet (303) is provided on its wall. The oblique air outlets (303) are aligned in the same direction. A guide sleeve (304) is fitted around the outside of the connecting pipe (302). The inner diameter of the guide sleeve (304) is larger than the outer diameter of the connecting pipe (302), forming an annular space between them. Multiple bypass holes (3021) are provided near the bottom of the connecting pipe (302), and the bypass holes (3021) are positioned below the lower end of the guide sleeve (304). The lower conical section (30) also has... An air intake vibration device (40) is provided, which generates vibration by changing the air intake frequency. The air intake vibration device (40) includes an air guide pipe (401), which is inserted and fixed to the outer wall. A limiting ring A (402) is fixed to the outer wall of the air outlet of the air guide pipe (401), and a limiting ring B (403) is fixed to the outer wall of the bottom of the pipe located inside the lower cone section (30). A vibration ring (404) is sleeved on the air guide pipe (401) and can slide along the air guide pipe (401). A sealing plate (405) is connected to the top of the vibration ring (404) through a connecting rod A. The diameter of the sealing plate (405) is larger than the diameter of the air guide pipe (401). A spring (406) is connected between the vibration ring (404) and the limiting ring B (403). The middle cylindrical section (20) is provided with at least one set of side-rotating air intake devices (201).

2. The fluidized bed air inlet structure with a vibration device as described in claim 1, characterized in that: The inclined air outlet pipe (303) has an inclination angle of 30~60° and is evenly distributed around the connecting pipe (302).

3. The fluidized bed air inlet structure with a vibration device as described in claim 1, characterized in that: The bypass hole (3021) is uniformly arranged along the circumference of the connecting pipe (302). The axis of the bypass hole (3021) is perpendicular to the axis of the connecting pipe (302), and the hole diameter is 0.1-0.2 times the inner diameter of the connecting pipe (302).

4. The fluidized bed air inlet structure with a vibration device according to claim 1, characterized in that, Under normal conditions, the sealing plate (405) covers the air outlet of the air duct (401), and the spring (406) is in its original state or slightly stretched state.

5. A fluidized bed air inlet structure with a vibration device according to claim 1, characterized in that, The cross-section of the sealing plate (405) is arc-shaped, and the radius of curvature of the arc-shaped protrusion at the top of the sealing plate (405) is 1.2-1.5 times the diameter of the sealing plate (405).

6. The fluidized bed air inlet structure with a vibration device as described in claim 1, characterized in that: The side-rotating air intake device (201) includes multiple side-rotating air intake pipes, which are obliquely inserted and uniformly fixed to the middle cylindrical section (20), and the included angle between the vertical surfaces of the side-rotating air intake pipes is 30~55°.

7. A fluidized bed air inlet structure with a vibration device as described in claim 1, characterized in that: The ratio of the inner diameter of the guide sleeve (304) to the outer diameter of the connecting pipe (302) is 1.2:1 to 1.5:

1.

8. A fluidized bed air inlet structure with a vibration device as described in claim 1, characterized in that: The guide sleeve (304) is fixedly connected to the connecting pipe (302) via the connecting rod B (3041).

Images