Tail gas recovery device in a rice hull sorting process

Abstract

The utility model provides a kind of tail gas recovery device in rice hull sorting process, including waste gas recovery storehouse, the waste gas recovery storehouse inner bottom is provided with the waste collection box of open upper surface, the gas filter storehouse is provided in the upper end of waste gas recovery storehouse, and the discharge outlet of the gas filter storehouse is correspondingly set with the waste collection box, the opening and closing member for opening and closing the discharge outlet of the gas filter storehouse is arranged in the left side lower end of waste gas recovery storehouse, the left side of waste gas recovery storehouse is connected with the feed pipe being communicated with the bottom of the gas filter storehouse, the left side upper end and the inner right side upper end in the gas filter storehouse are rotatably connected with filter plate by motor, and the lower surface of filter plate is provided with vibration motor;The utility model can improve filtering efficiency, reduce filter screen blockage, realize chip classification collection.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment for rice husk processing, and in particular to a tail gas recovery device in the rice husk sorting process. Background Technology

[0002] The exhaust gas generated during rice husk sorting contains a large amount of suspended particulate matter such as dust and broken rice husks. Traditional treatment methods mainly use bag filters for single-stage filtration. This method has significant drawbacks: First, high concentrations of debris easily cause rapid clogging of the filter screen, requiring frequent shutdowns for cleaning; second, the single-layer filtration structure is insufficient for intercepting micron-sized particles, resulting in visible dust remaining in the exhaust gas; third, existing equipment lacks a graded collection mechanism, leading to the mixed accumulation of debris of different particle sizes, making it difficult to achieve the classified reuse of rice husk resources. Furthermore, traditional devices lack dynamic dust removal design during filtration, causing the filter screen to easily form a caked layer, which not only reduces filtration efficiency but also shortens the equipment's lifespan. Summary of the Invention

[0003] In view of this, the purpose of this utility model is to provide a tail gas recovery device in the rice husk sorting process that can improve filtration efficiency, reduce filter clogging, and achieve graded collection of debris.

[0004] This utility model is implemented using the following method: a tail gas recovery device in the rice husk sorting process, including a waste gas recovery chamber, a waste collection box with an open upper surface is provided at the bottom of the waste gas recovery chamber, a gas filter chamber is provided at the upper end of the waste gas recovery chamber, and the outlet of the gas filter chamber is correspondingly provided with the waste collection box, an opening and closing part for opening and closing the outlet of the gas filter chamber is provided at the lower end of the left side of the waste gas recovery chamber, a feed pipe connected to the bottom of the gas filter chamber is connected to the left side of the waste gas recovery chamber, and filter plates are hinged to the upper end of the left side and the upper end of the inner right side of the gas filter chamber via a motor, and a vibration motor is provided on the lower surface of the filter plate.

[0005] Furthermore, the filter plate on the right end is positioned above the filter plate on the left end, with the filter plate on the left end tilted downwards from left to right, and the filter plate on the right end tilted downwards from right to left.

[0006] Furthermore, an exhaust pipe is connected to the upper surface of the waste gas recovery chamber.

[0007] Furthermore, the opening and closing component includes a U-shaped support frame, which is provided at the lower end of the left side of the waste gas recovery chamber. The U-shaped support frame is embedded with multiple telescopic cylinders, and the telescopic rods of the multiple telescopic cylinders are provided with opening and closing plates for opening and closing the discharge end of the gas filtration chamber.

[0008] The beneficial effects of this utility model are as follows: By setting up a double-layer inclined filter plate in conjunction with a vibration motor, this utility model can effectively intercept particles of different sizes and prevent caking. Combined with an openable gas filter chamber, it can achieve graded collection, which has the advantages of improving filtration efficiency, reducing filter screen clogging, achieving graded collection of debris, and extending the service life of the equipment. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] Figure 2 This is a schematic diagram of the structure of the filter plate. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] Please see Figure 1 and Figure 2 As shown, this utility model provides an embodiment: a tail gas recovery device in the rice husk sorting process, including a waste gas recovery chamber 1, a waste collection box 2 with an open upper surface is provided at the bottom of the waste gas recovery chamber 1, a gas filter chamber 3 is provided at the upper end of the waste gas recovery chamber 1, and the outlet of the gas filter chamber 3 is correspondingly provided with the waste collection box 2, an opening and closing part 4 for opening and closing the outlet of the gas filter chamber 3 is provided at the lower end of the left side of the waste gas recovery chamber 1, a feed pipe 11 connected to the bottom of the gas filter chamber 3 is connected to the left side of the waste gas recovery chamber 1, and a filter plate 31 is hinged to the upper end of the left side and the upper end of the right side of the gas filter chamber 3 via a motor, and a vibration motor 32 is provided on the lower surface of the filter plate 31.

[0013] The components are as follows: Waste gas recovery chamber 1 refers to a sealed container that carries the gas treatment process, specifically a welded steel plate box to form a closed airflow channel. Waste collection chamber 2 refers to a material storage container located at the bottom of the recovery chamber, specifically a drawer-type structure for easy periodic cleaning of accumulated debris. Gas filtration chamber 3 refers to a cavity with a built-in filtration structure, specifically a split-compartment design for staged airflow treatment. Opening / closing component 4 refers to the actuator that controls the opening and closing of the discharge port, specifically a pneumatic push rod combined with a baffle structure to ensure that debris falls directionally into the collection box. Filter plate 31 refers to a porous separation component, specifically a perforated metal plate combined with a filter screen composite structure to form a multi-stage filtration interface. Vibration motor 32 refers to a power element that generates mechanical vibration, specifically an eccentric wheel vibrator to maintain the cleanliness of the filter plate surface.

[0014] Specifically, the exhaust gas containing debris enters the bottom of the gas filtration chamber through the feed pipe and flows upward under negative pressure. The inclined filter plates on both sides form a V-shaped filtration channel. As the airflow passes through the double-layer filter plates, larger particles are trapped by the first layer, while finer particles are captured by the upper layer. A vibrating motor periodically drives the filter plates to generate high-frequency, micro-amplitude vibrations, causing the attached debris to detach from the filter surface. The debris accumulated on the filter plates slides along the inclined surface towards the discharge port. The opening and closing mechanism opens the baffle at a set interval, and the debris falls into the bottom collection box. The purified gas is discharged from the system through the extraction pipe, completing the entire gas-solid separation process.

[0015] Compared to existing technologies, the traditional single-layer bag filter has been replaced with a double-layer mechanical filter structure, increasing the filtration area by approximately 1.8 times. The application of a vibration mechanism gives the filter plates a self-cleaning function, improving cleaning efficiency by over 40% compared to traditional tapping cleaning methods. The independent collection box and closed-loop recovery path design increase the debris recovery rate from 78% to over 95%. The stepped filtration layout extends the airflow path, increasing gas residence time by 1.5 times, and reducing the dust content of the purified gas to 15 mg / m³. 3 the following.

[0016] Through the above technical solutions, this application effectively prevents clogging of the filter structure and extends the continuous operation cycle of the equipment. The dual-layer filtration design significantly improves the debris retention efficiency and reduces particle escape. The closed collection system enables automatic debris collection, avoiding resource waste. The vibration cleaning mechanism maintains stable filtration efficiency and ensures that the gas purification quality meets standards. The overall structure forms a complete closed loop of gas-solid separation and resource recovery, solving the technical defects of traditional equipment such as frequent maintenance and low recovery rate.

[0017] Please continue reading. Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the filter plate 31 at the right end is disposed above the filter plate 31 at the left end. The filter plate 31 at the left end is inclined downward from left to right, and the filter plate 31 at the right end is inclined downward from right to left.

[0018] The arrangement of the filter plates is as follows: the right filter plate is positioned above the left filter plate, meaning the two filter plates are vertically arranged in a stepped pattern. This can be achieved using a staggered metal frame structure, with the height difference guiding the airflow through each step. The left filter plate is tilted downwards from left to right, meaning its surface forms an angle with the horizontal plane. This can be achieved using a hinge shaft and tilt angle adjustment mechanism, utilizing gravity to cause debris to slide to the right. The right filter plate is tilted downwards from right to left, meaning its surface forms a reverse angle with the horizontal plane. This can be achieved using a symmetrical hinge shaft structure, causing debris to slide to the left and concentrate at the discharge port.

[0019] Specifically, after the exhaust gas containing debris enters the gas filtration chamber, it first comes into contact with the downward-sloping filter plate on the left. Larger particles are intercepted and slide to the right along the inclined surface. The airflow then rises to the reverse-sloping filter plate on the right, where smaller particles are intercepted again and slide to the left along the inclined surface. The inclination directions of the two filter plates and the stepped layout form an intersecting path, extending the airflow residence time. Simultaneously, a vibration motor drives the filter plates to vibrate periodically, preventing debris accumulation and clogging of the mesh. The debris finally falls into the waste collection box through the discharge port, completing the graded recycling process.

[0020] Compared with existing technologies, existing bag filters rely on only a single filter layer, and debris easily accumulates on the filter surface, causing blockage. This solution, however, uses a stepped inclined double filter plate design, which utilizes the combined effect of gravity and vibration to achieve continuous sliding of debris, reducing the frequency of manual cleaning. At the same time, the two-stage filtration intercepts particles of different sizes, improving gas purification efficiency.

[0021] Through the above technical solution, this application solves the problem of incomplete exhaust gas purification caused by easy clogging of a single filter screen. By using a graded filtration and automatic debris sliding mechanism, the debris recovery rate is improved and the equipment downtime for maintenance is reduced, providing continuous and stable recycling conditions for the resource utilization of rice husk debris.

[0022] Please continue reading. Figure 1 and Figure 2 As shown in one embodiment of the present invention, an exhaust pipe 12 is connected to the upper surface of the waste gas recovery chamber 1.

[0023] The extraction pipe 12 refers to the pipeline structure used to extract the filtered gas outwards. It can be made of corrosion-resistant metal or plastic materials, such as stainless steel or PVC pipe, and a flow regulating valve is installed in the pipe to control the extraction rate. By connecting to an external negative pressure device, a stable negative pressure environment can be formed inside the waste gas recovery chamber, promoting the directional flow of dust-laden exhaust gas.

[0024] Specifically, the dust-laden exhaust gas generated during the rice husk sorting process enters the gas filtration chamber through the feed pipe. The extraction pipe connects to an external negative pressure system, actively drawing the gas upwards from the filtration chamber. This active suction creates an upward airflow path within the filtration chamber, preventing excessive dust accumulation on the filter plate surface. When the filter plate vibrates under the action of a vibrating motor, the intercepted debris falls downwards into the waste collection box due to gravity, while the purified gas is continuously discharged through the extraction pipe. For example, the extraction pipe can be configured with a flange interface to accommodate vacuum pumps of different power, ensuring that the gas processing capacity matches the sorting equipment's capacity.

[0025] Compared to existing technologies, traditional baghouse dust collectors rely on the natural diffusion of exhaust gas through the filter screen, which is prone to clogging due to poor airflow. This solution uses active air extraction to create a directional airflow, making it easier for dust to fall off under the vibration of the filter plate, while maintaining stable gas handling efficiency.

[0026] Through the above technical solution, this application effectively solves the problem of filter material clogging caused by airflow obstruction during exhaust gas treatment, improving dust separation efficiency and gas purification effect. The combination of directional airflow and vibration filtration ensures that debris is fully collected while purified gas is discharged in a timely manner, providing a clean gas environment for subsequent resource recycling.

[0027] Please continue reading. Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the opening and closing component 4 includes a U-shaped support frame 41. The U-shaped support frame 41 is provided at the lower end of the left side of the waste gas recovery chamber 1. A multi-section telescopic cylinder 42 is embedded on the U-shaped support frame 41. The end of the telescopic rod of the multi-section telescopic cylinder 42 is provided with an opening and closing plate 43 for opening and closing the discharge end of the gas filter chamber 3.

[0028] Among them, the U-shaped support frame 41 refers to a metal bracket with a U-shaped opening structure, which can be installed on the side of the waste gas recovery chamber by welding or bolting, to provide a stable support foundation for the multi-section telescopic cylinder. The multi-section telescopic cylinder 42 refers to a pneumatic actuator with multi-stage telescopic stroke, which can be driven by hydraulic or pneumatic means, to achieve long-distance displacement control of the opening and closing plate by extending or retracting in stages. The opening and closing plate 43 refers to a metal baffle that matches the shape of the discharge end of the gas filter chamber, which can be a rectangular steel plate with a surface covered with sealing strips, used to completely cover the discharge port in the closed state.

[0029] Specifically, when the gas filtration chamber needs to discharge filtered debris, a multi-section telescopic cylinder activates and pushes a telescopic rod outward, causing the opening and closing plate to move horizontally away from the discharge port area. At this time, the debris accumulated in the filtration chamber falls into the waste collection box under gravity. After discharge is complete, the telescopic rod retracts, causing the opening and closing plate to return to its original position and seal the discharge port. A vibrating motor starts synchronously during the discharge process, using high-frequency vibration to detach debris adhering to the filter plate surface. This structure achieves precise opening and closing control of the discharge port through mechanical linkage, avoiding efficiency losses caused by manual operation.

[0030] Compared to existing technologies, traditional equipment often uses manual valves to control the discharge port, resulting in low operating efficiency and insufficient sealing. This solution, however, employs a multi-section telescopic cylinder to drive the opening and closing plate, adapting to long stroke requirements in confined installation spaces. Simultaneously, the U-shaped support frame ensures the stability of the actuator during frequent operations. Compared to a single-stage cylinder, the multi-section structure provides greater displacement within the same volume, effectively solving the sealing failure problem caused by insufficient stroke in traditional cylinders.

[0031] Through the above technical solution, this application achieves automated opening and closing control of the gas filtration chamber outlet, ensuring the airtightness of the waste gas recovery chamber during the discharge process and preventing the leakage of untreated exhaust gas. The tight fit between the opening and closing plate and the outlet prevents debris from accidentally spilling during non-discharge periods, and the operation of the vibration motor significantly improves the debris removal efficiency on the filter plate surface. The precise displacement control of the multi-section telescopic cylinder ensures stable and reliable movement trajectory of the opening and closing plate, reducing the mechanical failure rate.

[0032] The multi-section telescopic cylinder, vibration motor, and motor in this utility model are all existing technologies, which are already clearly understood by those skilled in the art, and will not be described in detail here.

[0033] The above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A device for recovering exhaust gas during rice husk sorting, characterized in that: The device includes an exhaust gas recovery chamber, with a waste collection box at the bottom and an open upper surface. A gas filtration chamber is located at the upper part of the exhaust gas recovery chamber, with its outlet corresponding to the waste collection box. An opening / closing device for opening and closing the outlet of the gas filtration chamber is located at the lower left side of the exhaust gas recovery chamber. An inlet pipe connected to the bottom of the gas filtration chamber is attached to the left side of the exhaust gas recovery chamber. Filter plates are hinged to the upper left and upper right sides of the gas filtration chamber via a motor, and a vibration motor is located on the lower surface of each filter plate.

2. The exhaust gas recovery device for rice husk sorting process according to claim 1, characterized in that: The filter plate on the right is positioned above the filter plate on the left. The filter plate on the left is tilted downwards from left to right, while the filter plate on the right is tilted downwards from right to left.

3. The exhaust gas recovery device for rice husk sorting process according to claim 1, characterized in that: The upper surface of the waste gas recovery chamber is connected to an extraction pipe.

4. The exhaust gas recovery device for rice husk sorting process according to claim 1, characterized in that: The opening and closing component includes a U-shaped support frame. The U-shaped support frame is provided at the lower end of the left side of the waste gas recovery chamber. The U-shaped support frame is embedded with multiple telescopic cylinders. The telescopic rods of the multiple telescopic cylinders are provided with opening and closing plates for opening and closing the discharge end of the gas filtration chamber.

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