Bidirectional dust removal and ash collection machine

Abstract

A bidirectional blowback dust removal and dust collection machine successfully integrates efficient dynamic filtration and convenient disassembly-free online self-cleaning function through innovative bidirectional fan blade machine design, optimized double-layer filter structure, specific air duct connection and key one-way valve control, eliminates the cleaning blind area of traditional equipment, realizes all-around purification of the working space, simplifies filter maintenance, eliminates downtime disassembly and manual contact with pollution sources, greatly improves the continuous operation capacity of the equipment, effectively prevents secondary pollution through airtight dust collection system, significantly reduces operating wind resistance and energy consumption through efficient dust removal, and has broad application prospects and significant social and economic benefits after being put into the market.

Description

Technical Field

[0001] This article belongs to the technical field of gas or air filtration equipment, specifically relating to a bidirectional backflushing dust collector. Background Technology

[0002] In plastic granulation and dust-intensive production workshops, high-speed crushing, mixing, and granulation equipment continuously generates a large amount of micron-sized dust pollutants. These suspended particles, typically smaller than 10 microns in diameter, have strong adsorption properties and remain in the working environment for extended periods. This not only accelerates mechanical wear and reduces production visibility but also poses a serious threat to the respiratory system of operators, potentially leading to occupational diseases such as pneumoconiosis. While traditional ventilation systems can achieve air circulation, they cannot effectively capture and remove ultrafine particles. Therefore, developing air purification equipment that combines high-efficiency dust removal, automatic dust collection, and self-cleaning functions is of great significance for ensuring the safety of the production environment and the recycling of dust resources.

[0003] Current industrial air purification equipment has some significant technical shortcomings, such as:

[0004] Because mainstream unidirectional airflow purification devices have a single airflow path, they are prone to creating cleaning blind spots on the back of the equipment and in the corners of the workshop. The actual dust removal efficiency is generally less than 65%, and the residual dust needs to be cleaned manually for a second time.

[0005] While high-volume purification equipment designed for large spaces improves processing capacity, its filter maintenance process is extremely cumbersome. Taking baghouse dust collectors as an example, cleaning the dust accumulated on the filter bags requires stopping the machine and disassembling the entire casing, which takes an average of more than 2 hours, severely restricting the continuous operation of the production line.

[0006] In addition, the dust that accumulates on the inner wall of the filter bag is difficult to remove completely, which will cause the system's air resistance to increase by more than 30%, significantly increasing energy consumption.

[0007] More importantly, traditional vibration dust removal methods are prone to dust escape, while fixed dust collection structures directly expose operators to a high-concentration dust environment during manual dust removal.

[0008] Existing equipment generally cannot achieve continuous purification and in-situ regeneration of filter media in tandem, forcing the maintenance cycle to be shortened to less than 72 hours, which greatly increases the operation and maintenance costs.

[0009] Based on the shortcomings described above, the industry urgently needs to address the following key technical challenges:

[0010] Develop multi-directional dynamic airflow organization schemes to eliminate cleaning dead zones;

[0011] Establish an online regeneration mechanism for filter media that does not require disassembly, avoiding maintenance downtime and human contact with pollution sources;

[0012] Design a closed dust collection and transfer system to eliminate the risk of secondary pollution;

[0013] Optimize energy utilization efficiency and maintain system operational stability. Utility Model Content

[0014] To address the common technical shortcomings of existing industrial air purification equipment, such as blind spots in cleaning, cumbersome maintenance requiring shutdown and disassembly, incomplete filter cleaning leading to increased energy consumption, and the risk of secondary pollution during manual cleaning, this paper presents an innovative bidirectional reverse-blowing dust collector. This equipment breaks through the limitations of the traditional unidirectional airflow mode, integrating a highly efficient filtration and self-cleaning mechanism through a unique bidirectional fan and duct system design. It aims to achieve continuous purification of the workspace without dead angles, efficient in-situ regeneration of filter media, and safe and sealed dust collection, significantly improving dust removal efficiency, reducing maintenance costs, and ensuring operational safety.

[0015] A bidirectional reverse-blowing dust collector mainly includes a bidirectional fan, a filter, a bidirectional air duct, a unidirectional air duct, a unidirectional valve, and an external dust collection box.

[0016] As the core power source, the key feature of the bidirectional fan is that it has two switchable working states: blowing mode and suction mode. This bidirectional operation capability is the basis for the equipment to achieve the two core functions of filtration and self-cleaning.

[0017] As the core filtration unit, the filter contains a dust collection bag and a filter element. The dust collection bag covers the inner wall of the filter, thus forming a double-layer filtration structure. This design significantly enhances the dust collection efficiency and holding capacity. The filter has a first air duct interface and a second air duct interface at both ends, which are used to connect different airflow channels.

[0018] The first end of the bidirectional air duct is firmly connected to the first air duct interface of the filter, and the second end is designed as a detachable connection structure for connecting an external dust collection box. This air duct undertakes the key bidirectional airflow delivery task during equipment operation.

[0019] The unidirectional air duct connects to the second air duct interface of the filter, which is the output channel for clean air or a specific airflow.

[0020] The one-way valve is installed on the one-way air duct. Its function is to strictly limit the airflow direction to flow from the filter to the one-way air duct, prevent the airflow from flowing in reverse, and ensure the correctness of the airflow path of the system in a specific mode.

[0021] The bidirectional fan is located on the section of the bidirectional air duct between the first and second ends. This central arrangement enables it to efficiently pressurize or draw in the airflow passing through the bidirectional air duct.

[0022] This two-way reverse-blowing dust collector has two modes that can perform the following two operations:

[0023] Blower Filter Mode:

[0024] First, remove the external dust collection box to connect the second end of the bidirectional air duct to the atmosphere. Then, switch the bidirectional fan to blowing mode and start it. At this time, the external airflow enters from the open second end of the bidirectional air duct, is pressurized after passing through the bidirectional fan, and is blown into the filter at high speed. The dust-laden air first impacts the inner wall of the dust collection bag, and larger particles are initially intercepted. The airflow then penetrates the dust collection bag and filter element, and fine dust is efficiently intercepted. The clean air then enters the unidirectional air duct through the second air interface of the filter and is smoothly output through the unidirectional valve.

[0025] The advantages of this mode are that it uses pressurized airflow to directly impact the filter medium, forming dynamic filtration, which effectively improves filtration efficiency and speed; the double-layer structure design of the dust collection bag covering the inner wall increases the effective filtration area and improves dust holding capacity; and the one-way valve ensures that clean air can only be output in one direction to prevent contamination.

[0026] Suction and dust removal mode:

[0027] First, reinstall the external dust collection box back into the second end of the bidirectional air duct. Then, switch the bidirectional fan to suction mode and start it. In suction mode, the bidirectional fan generates negative pressure in the bidirectional air duct. This negative pressure acts on the inside of the filter, effectively peeling off the dust adhering to the inner wall of the dust collection bag and the surface of the filter element. The peeled dust is drawn into the bidirectional air duct with the airflow and finally collected in the sealed external dust collection box. During this process, the one-way valve on the one-way air duct automatically closes due to the negative pressure, preventing the airflow from entering the one-way air duct in reverse and ensuring that all suction is applied to the dust removal process inside the filter.

[0028] The advantages of this mode are that it enables in-situ regeneration of filter media without disassembly, efficiently removing clumps of dust without shutting down the machine, and completely solving the problems of cumbersome maintenance and long downtime. The dust removal process is completed in a closed system, and the stripped dust is directly introduced into an external dust collection box, completely avoiding the risks of dust exposure and secondary pollution caused by manual dust removal. It effectively removes dust accumulation on the filter media, significantly reduces system air resistance, restores equipment performance, and saves operating energy. The automatic closing of the one-way valve is the key to ensuring the effective operation of this mode, preventing airflow short-circuiting and ensuring that the negative pressure of dust removal is concentrated on the filter media.

[0029] Beneficial effects:

[0030] In summary, the bidirectional reverse-jet dust collector presented in this paper successfully integrates efficient dynamic filtration with convenient, non-disassembly online self-cleaning functionality through innovative bidirectional fan design, optimized double-layer filter structure, specific duct connection, and key one-way valve control. It eliminates the cleaning blind spots of traditional equipment, achieving comprehensive purification of the workspace. Furthermore, it simplifies filter media maintenance, eliminates downtime for disassembly and manual contact with pollution sources, significantly improving the equipment's continuous operation capability. The sealed dust collection system effectively prevents secondary pollution, and efficient dust removal significantly reduces operating resistance and energy consumption. Once on the market, this equipment will greatly improve air quality in dust-intensive production environments, protect worker health, reduce equipment wear, lower overall operation and maintenance costs, and provide reliable technical support for the safe recycling of dust resources. It has broad application prospects and significant socio-economic benefits. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a two-way reverse-flushing dust collector;

[0032] Figure 2 It is a positive attempt at a two-way reverse-blowing dust collector;

[0033] Figure 3 This is a schematic diagram of the forward airflow direction of a two-way reverse-blowing dust collector;

[0034] Figure 4 This is a schematic diagram of the reverse suction direction of a two-way reverse-blowing dust collector;

[0035] In the diagram, 1 is a bidirectional fan, 2 is a filter, 3 is a one-way valve, 4 is a bidirectional air duct, 5 is a one-way air duct, and 6 is an external dust collection box. Detailed Implementation

[0036] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0037] 1. Two-way fan blades; 2. Filter; 3. One-way valve; 4. Two-way air duct; 5. One-way air duct; 6. External dust collection box.

[0038] like Figure 1 , 2 As shown in Figures 3 and 4, the core structure of this bidirectional reverse-blowing dust collector consists of a bidirectional fan 1, a filter 2, a bidirectional air duct 4, a unidirectional air duct 5, a unidirectional valve 3, and an external dust collection box 6.

[0039] The bidirectional fan 1, as the power core, has the function of switching between blowing and suction modes. It is installed on the air duct section between the first and second ends of the bidirectional air duct 4. The filter 2 integrates a dust collection bag and a filter element. The dust collection bag covers the inner wall of the filter 2 to form a double-layer filtration structure, which significantly improves the dust interception efficiency. The filter 2 has a first air duct interface and a second air duct interface at both ends. The first end of the bidirectional air duct 4 is fixedly connected to the first air duct interface of the filter 2, and the second end is connected to the external dust collection box 6 through a detachable structure. The unidirectional air duct 5 is connected to the second air duct interface of the filter 2 and is equipped with a one-way valve 3 to force the airflow direction to be unidirectional flow from the filter 2 to the unidirectional air duct 5.

[0040] The device operates by switching between two modes:

[0041] In the blowing filtration mode, the external dust collection box 6 needs to be removed so that the second end of the bidirectional air duct 4 is connected to the atmosphere. After the bidirectional fan 1 is switched to the blowing mode, it is started. The external airflow enters through the open end of the bidirectional air duct 4, and after being pressurized by the fan, it rushes into the filter 2 at high speed. The dust-laden airflow is purified step by step in the double-layer filtration structure. After the clean air passes through the filter medium, it is output through the unidirectional air duct 5, while the dust is trapped in the dust collection bag. During this process, the one-way valve 3 maintains the unidirectional output of the airflow to avoid backflow pollution.

[0042] In the suction dust removal mode, the external dust collection box 6 needs to be installed at the second end of the bidirectional air duct 4. After the bidirectional fan 1 is switched to suction mode and started, the negative pressure generated by the fan acts on the inside of the filter 2, and reverses the dust on the surface of the dust collection bag and filter element. The dust that is removed is sucked into the sealed external dust collection box 6 through the bidirectional air duct 4 with the airflow. At this time, the one-way valve 3 is automatically closed under the action of negative pressure, blocking the airflow from entering the one-way air duct 5 in the opposite direction, and ensuring that the dust removal negative pressure is concentrated inside the filter 2.

[0043] Implementation Example

[0044] Example 1: Application of air-blowing filtration mode in plastic pelleting workshop

[0045] On the plastic granule production line, the equipment is switched to the blowing and filtering mode. The operator disassembles the external dust collection box 6 at the second end of the bidirectional air duct 4, so that the air duct is directly connected to the atmosphere. Then, the bidirectional fan 1 is switched to the blowing mode and started. Dust-laden air is drawn in from the opening of the bidirectional air duct 4, and after being pressurized by the fan, it rushes into the filter 2 at a flow rate of 15m / s. The airflow first hits the inner wall of the dust collection bag, and particles with a diameter >5μm are intercepted. Fine dust penetrates the dust collection bag and is then intercepted again by the filter element. The purified air is discharged back to the workshop through the unidirectional air duct 5. When the dust accumulation in the dust collection bag reaches 300g, the mode is switched.

[0046] Example 2: Suction dust removal mode enables in-situ regeneration of filter media.

[0047] When the differential pressure of filter 2 rises to 800Pa, the system switches to suction dust removal mode. The operator connects the 20L external dust collection box 6 to the second end of the bidirectional air duct 4 via a flange. After the bidirectional fan 1 switches to suction mode and starts, a negative pressure of -5kPa is formed in the air duct, which reverses the dust accumulation on the inner wall of the dust collection bag. The detached dust clumps are then sucked into the dust collection box with the airflow. The cleaning process lasts for 120 seconds. When the system differential pressure drops below 200Pa, the one-way valve 3 automatically closes under negative pressure to prevent backflow. Filter 2 does not need to be disassembled throughout the process, reducing maintenance time to 1 / 10 of traditional equipment.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bidirectional reverse-flushing dust collector, characterized in that, include: Two-way fan blades, filter, two-way air duct, one-way air duct, one-way valve and external dust collection box; The bidirectional fan has both blowing and suction modes. The filter is equipped with a dust collection bag and a filter element inside, and has a first air duct interface and a second air duct interface at its two ends respectively. The first end of the bidirectional air duct is connected to the first air duct interface of the filter, and the second end is detachably connected to an external dust collection box. The unidirectional air duct is connected to the second air duct interface of the filter; The one-way valve is located on the one-way air duct, and the airflow direction is limited to flow from the filter to the one-way air duct; The bidirectional fan is installed on the section of the bidirectional air duct between the first and second ends.

2. The bidirectional reverse-flushing dust collector and ash collector according to claim 1, characterized in that: The dust collection bag of the filter is wrapped around the inner wall of the filter to form a double-layer filtration structure.

3. The bidirectional reverse-flushing dust collector and ash collector according to claim 1, characterized in that: The detachable structure can be a snap-fit, threaded, or flanged connection structure.

4. A bidirectional reverse-flushing dust collector according to any one of claims 1, 2, and 3, characterized in that: The second end of the bidirectional air duct is configured to form an open port communicating with the external atmosphere when it is not connected to the external dust collection box. The bidirectional fan is configured to drive external airflow sequentially through the open port, the bidirectional fan, and the first end of the bidirectional duct in blowing mode, and then into the filter, impacting the dust collection bag. After the airflow carrying dust is filtered by the filter element, the clean air is discharged through the unidirectional duct.

5. A bidirectional reverse-flushing dust collector according to any one of claims 1, 2, and 3, characterized in that: The second end of the bidirectional air duct is configured to form a sealed connection when it is connected to the external dust collection box. The bidirectional fan is configured to generate negative pressure inside the filter and the bidirectional air duct in suction mode, so that the dust on the dust collection bag is stripped off and sucked in through the first end of the bidirectional air duct with the airflow, and finally collected in the external dust storage box. Meanwhile, the one-way valve automatically closes under negative pressure, preventing airflow from flowing back into the filter through the one-way duct.

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