A method of face sealing

Abstract

This invention relates to the field of environmentally friendly dust removal technology for baghouse dust collectors, specifically disclosing a movable surface sealing method, comprising the following steps: a sliding sealing component is provided on the upper part of the compartment box, and the sliding sealing component moves and seals within a small unit; the sliding sealing component is provided with an upper frame and a lower frame, and the elastic material between the upper frame and the lower frame allows the sealed surface to expand and contract vertically within the small unit; the tail ends of the upper frame and the lower frame are provided with an airtight tough material that is "foldable" or "stretchable"; a sealed space is formed between the upper frame, the lower frame and the airtight tough material, and the elongation and shortening of the sealed space are controlled to adapt to small units with sealed surfaces of different sizes; in the direction of the sealed surface, a sealing material of suitable size and thickness to the sealed surface is installed at the bottom of the lower frame; this invention provides a movable surface sealing method with simple structure, convenient operation, and reliable sealing; the key component of the sliding seal can realize ultra-low pressure dust removal of circular dust collector filter bags.

Description

Technical Field

[0001] This invention relates to the field of environmentally friendly dust removal technology for baghouse dust collectors, specifically to a movable surface sealing method. Background Technology

[0002] With increasingly stringent environmental protection requirements, more and more dust removal equipment is being used in production and daily life across various industries, with bag filters being the mainstay among dust collectors.

[0003] The reverse-air cleaning system of baghouse dust collectors has always used pulse cleaning. An air compressor produces compressed air, which is injected into the air tank through pipelines. During the bag cleaning operation, the compressed air passes through pipelines, air manifold, electromagnetic pulse valve, blowpipe, and venturi tube to complete the reverse-air cleaning operation.

[0004] The pulse jet cleaning system for baghouse dust collectors has several drawbacks. First, the system is complex and requires a large initial investment, involving an air compressor station, electrical control room, air compressor, air tank, gas pipeline, steam drum, control panel, and control instruments. Second, the high-value consumables such as electromagnetic pulse valves and diaphragms, along with the high energy consumption of the air compressor, result in high maintenance and operating costs. Third, the high-pressure gas used in pulse jet cleaning continuously damages the filter bags, increasing the material requirements for the bags and shortening their lifespan. Fourth, the pulse jet cleaning gas is sourced from natural gas, which is colder than the temperature inside the dust collector. This causes heat loss and repeated temperature changes within the dust collector, reducing the baghouse's dust collection efficiency. In winter, the large temperature difference between the inside and outside causes condensation on the filter bags. In dust collection environments with high moisture content, condensation is severe, leading to a sharp increase in pressure resistance and eventually loss of dust collection capacity.

[0005] The pulse-jet cleaning system for baghouse dust collectors has many drawbacks and problems, leaving considerable room for improvement. This direction has broad application and research value, and also offers potential for continuous improvement. Therefore, designing a movable surface sealing method that completely replaces the pulse-jet cleaning system eliminates its various drawbacks. This method is valuable for both widespread adoption of new equipment and retrofitting of existing equipment, offering significant cost, efficiency, and technological advantages. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of this invention is to provide a movable surface sealing method, wherein repeated and rapid sealing of the bag outlet surface is a key technology for achieving low-pressure dust removal.

[0007] The technical solution adopted by this invention to solve its technical problem is: a movable surface sealing method, comprising the following steps:

[0008] 1) A compartment box is installed in the upper housing of the bag filter, which divides the outlet of the filter bag into several small units;

[0009] 2) A sliding sealing component is installed on the upper part of the compartment box, and the sliding sealing component moves to seal within a certain small unit;

[0010] 3) The sliding sealing component is equipped with an upper skeleton and a lower skeleton. The elastic material between the upper skeleton and the lower skeleton allows the sealed surface to expand and contract vertically within the small unit.

[0011] 4) The upper and lower skeletons are fitted with “foldable” or “stretchable” air-impermeable tough material at their tails. After pressurized gas or fluid is filled between the upper and lower skeletons, the upper and lower skeletons overcome the elastic material and move toward the sealed surface. After the pressurized gas or fluid is released, the “foldable” or “stretchable” air-impermeable tough material returns to its original shape.

[0012] 5) A sealed space is formed between the upper frame, the lower frame and the airtight tough material. The gas or fluid enters and exits this sealed space through the air supply system, and the lengthening and shortening of the sealed space are controlled to adapt to small units with different sizes of sealed surfaces.

[0013] 6) On the direction of the sealed surface, install a sealing material of suitable size and thickness to the sealed surface at the bottom of the lower frame. After the lower frame is subjected to force and stretches downward, the sealed surface is well sealed and meets the requirements of repeated sealing.

[0014] Specifically, the bag filter in step 1) includes an upper box and a lower box. The upper box is provided with a clean air chamber and an air outlet, and the lower box is provided with an air inlet, a dust collector bag and a dust hopper. A compartment box is installed at the upper part of the connection between the upper box and the lower box, and the compartment box is divided into several small units by a partition plate.

[0015] Specifically, the sliding sealing component in step 2) includes an upper frame, a lower frame, an elastic material, a sealing material, an airtight tough material, and a rotating shaft. The rotating shaft is installed in the middle of the compartment box, and the upper and lower frames are mounted on the rotating shaft. The elastic material is connected between the upper and lower frames, and the airtight tough material is connected to the rear of the upper and lower frames. The sealing material is installed at the bottom of the lower frame. The upper and lower frames drive the elastic material, sealing material, and airtight tough material to rotate through the rotating shaft to seal them in different small units.

[0016] Specifically, the upper part of the upper frame is equipped with pulleys via brackets, and the pulleys slide in the sliding grooves, which are installed on the inner wall of the upper housing.

[0017] Specifically, the air supply system in step 5) includes an air intake, a fan, an air inlet pipe, an expansion pipe, a backflush pipe, and an exhaust port. The air intake is located on one side of the clean air chamber. The air intake is connected to the fan via a flexible hose. The fan is connected to the air inlet pipe via a flexible hose. The air inlet pipe extends into the middle of the rotating shaft. An air inlet is located in the middle of the air inlet pipe. The air inlet is connected to the expansion pipe and the backflush pipe. The expansion pipe enters the upper frame and is used to fill the sealed space between the upper and lower frames with air, blowing up the airtight and tough material. The backflush pipe passes through the upper and lower frames and enters the sealing material. It is used by the fan to draw air from the clean air chamber and blow it into the sealed small unit, filling the sealed small unit and the dust collection bag below with air.

[0018] Specifically, the upper frame is also provided with an exhaust port, which is equipped with a sealing cover. After the dust is cleaned in the sealing unit, the exhaust port releases the gas in the sealed space between the upper and lower frames. Then, the upper and lower frames are moved by the rotating shaft to enter the next sealing unit.

[0019] The present invention has the following beneficial effects:

[0020] The movable surface sealing method designed in this invention is simple in structure, convenient to operate, reliable in sealing, and widely applicable. As a key component of the sliding seal, this invention can realize ultra-low pressure dust removal of circular dust collector filter bags, replace the pulse dust removal system, and improve the filter bag dust removal operation. This invention can achieve sliding sealing very well, is easy to move, and has reliable sealing, meeting the requirements of first blocking the dust removal airflow and then backflushing for dust removal. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention using a circular bag filter as an example.

[0022] Figure 2 This is a top view of the compartment box and the sliding sealing component.

[0023] Figure 3 This is a cross-sectional view of the sliding seal component.

[0024] In the diagram: 1-Upper box; 2-Lower box; 3-Dust collector bag; 4-Compartment box; 4.1-Divider plate; 4.2-Small unit;

[0025] 5-Sliding sealing component, 5.1-Upper skeleton, 5.2-Lower skeleton, 5.3-Elastic material, 5.4-Sealing material, 5.5-Air-impermeable tough material, 5.6-Pulley, 5.7-Slide groove, 5.8-Rotating shaft;

[0026] 6-Air supply system, 6.1-Air intake, 6.2-Fan, 6.3-Air inlet pipe, 6.4-Air inlet, 6.5-Expansion pipe, 6.6-Backflush pipe, 6.7-Exhaust port;

[0027] 7-Clean air chamber; 8-Ash hopper; 9-Air inlet; 10-Air outlet. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0029] like Figure 1-3 As shown, a movable surface sealing method uses a circular bag filter as an example structure, including an upper box 1, a lower box 2, a dust collector bag 3, a compartment box 4, a sliding sealing component 5, and an air supply system 6. The upper box 1 is provided with a clean air chamber 7 and an air outlet 10. The lower box 2 is provided with an air inlet 9, a dust collector bag 3, and a dust hopper 8. The dust collector bag 3 is installed in the lower box 2 to form a turbid air chamber. The bottom of the dust collector bag 3 is provided with a dust hopper 8.

[0030] The compartment box 4 is installed on the partition between the upper box 1 and the lower box 2 at the air outlet 10. The compartment box 4 is designed as a fan-shaped sealed surface with openings at the top and bottom. The compartment box 4 is provided with several partition plates 4.1. The partition plates 4.1 divide the upper box 1 and the lower box 2 at the outlet of the dust collector bag 3 into several small units 4.2.

[0031] The sliding sealing component 5 includes an upper frame 5.1, a lower frame 5.2, an elastic material 5.3, a sealing material 5.4, an airtight tough material 5.5, a pulley 5.6, a groove 5.7, and a rotating shaft 5.8. The rotating shaft 5.8 is installed in the middle of the compartment box 4. The upper frame 5.1 and the lower frame 5.2 are mounted on the rotating shaft 5.8. The elastic material 5.3, which is a spring, is connected between the upper frame 5.1 and the lower frame 5.2. The airtight tough material 5.5, which is made of rubber, is connected to the rear of the upper frame 5.1 and the lower frame 5.2. The sealing material 5.4, which is a rubber sealing sector plug, a graphite sealing sector plug, or a polytetrafluoroethylene sealing sector plug, is installed at the bottom of the lower frame 5.2. The upper frame 5.1 and the lower frame 5.2 drive the elastic material 5.3, the sealing material 5.4, and the airtight tough material 5.5 to rotate through the rotating shaft 5.8 to seal them within different small units 4.2. The upper part of the upper frame 5.1 is equipped with a pulley 5.6 via a bracket. The pulley 5.6 slides in the slide groove 5.7, which is installed on the inner wall of the upper box 1.

[0032] The air supply system 6 includes an air intake 6.1, a fan 6.2, an air inlet pipe 6.3, an expansion pipe 6.5, a backflush pipe 6.6, and an exhaust port 6.7. The air intake 6.1 is located on one side of the clean air chamber 7. The air intake 6.1 is connected to the fan 6.2 through a flexible hose. The fan 6.2 is connected to the air inlet pipe 6.3 through a flexible hose. The air inlet pipe 6.3 extends into the middle of the rotating shaft 5.8. An air inlet 6.4 is provided in the middle of the air inlet pipe 6.4, which is connected to the expansion pipe 6. 5 and backflush air pipe 6.6, expansion air pipe 6.5 enter the upper frame 5.1, used to fill air into the sealed space between the upper frame 5.1 and the lower frame 5.2, blowing up the air-impermeable tough material 5.5. Backflush air pipe 6.6 passes through the upper frame 5.1 and the lower frame 5.2 and enters the sealing material 5.4, used by the fan 6.2 to draw air from the clean air chamber 7 and blow it into the sealed small unit 4.2, and to blow filling air into the sealed small unit 4.1 and the dust collector bag 3 below.

[0033] The upper frame 5.1 is also provided with an exhaust port 6.7, which is equipped with a sealing cover. After the dust is cleaned in the sealing unit 4.2, the exhaust port 6.7 releases the gas in the sealed space between the upper frame 5.1 and the lower frame 5.2. Then, the upper frame 5.1 and the lower frame 5.2 are moved into the next sealing unit 4.2 by the rotating shaft 5.8.

[0034] A removable surface sealing method includes the following steps:

[0035] 1. The present invention is used as a sliding sealing component 5 in a circular bag dust collector. The sliding sealing component 5 serves to first block the dust collection airflow, creating conditions for subsequent backflushing and dust removal.

[0036] 2. The air supply system 6 draws air from the clean air chamber 7 and sends it into the small unit 4.2 of the sealed compartment box 4.

[0037] 3. The sliding sealing component 5 is slightly larger than the fan-shaped surface of the small unit 4.2. It rotates around the rotating shaft 5.8 and stops above the small unit 4.2. After the operation is completed, it rotates to the next small unit 4.2 and repeats the cycle.

[0038] 4. The pressurized gas transported in the expansion pipe 6.5 of the sliding sealing component 5 enters the sealed space of the sliding seal, while the pressurized gas transported in the backflush pipe 6.6 passes through the sliding sealing component 5 and enters the compartment box 4.

[0039] 5. One end of the sliding seal component 5 is fixed to the rotating shaft 5.8, and the other end slides along the groove 5.7 on the inner wall of the dust collector. The main body of the sliding seal is a skeleton, with rigid material forming the upper skeleton 5.1 and the lower skeleton 5.2. The upper skeleton 5.1 and the lower skeleton 5.2 conform to the sealing surface, allowing the upper skeleton 5.1 and the lower skeleton 5.2 to expand and contract in the vertical direction of the sealing surface. "Springs" (elastic materials) are provided on the upper skeleton 5.1 and the lower skeleton 5.2, allowing the upper skeleton 5.1 and the lower skeleton 5.2 to undergo the required elongation deformation after being subjected to force. When no external force is provided, the upper skeleton 5.1 and the lower skeleton 5.2 can return to their original shape under the action of the "springs" (elastic materials). An impermeable and tough material 5.5 is provided on the upper skeleton 5.1 and the lower skeleton 5.2. This allows the upper skeleton 5.1 and the lower skeleton 5.2 to overcome the "spring" (elastic material) effect and move towards the sealed surface after pressurized gas or fluid is filled in. After the pressurized gas is released, the impermeable and tough material 5.3 returns to its original shape. A sealing material 5.4 of suitable size and thickness to the sealed surface is provided below the upper skeleton 5.1 and the lower skeleton 5.2. This ensures that the sealed surface is well sealed after the upper skeleton 5.1 and the lower skeleton 5.2 are stretched under force, and meets the requirements for repeated sealing.

[0040] 6. There are three types of air ports on the sliding seal component 5. One type is the backflush air pipe 6.6, which passes through the seal and is used to transport backflush air. Another type is the expansion air pipe 6.5, which only passes through the upper layer of the seal and is used to transport expansion air to achieve the seal. The third type is the exhaust port 6.7, which only passes through the upper layer of the seal and is used to discharge the expansion air after the operation is completed.

[0041] 7. The sliding sealing component 5 rotates to the top of the small unit 4.2 and stops rotating; pressurized gas enters the sealed space of the sliding sealing component 5 through the expansion pipe 6.5; the sealed space of the sliding sealing component 5 expands, pushing the sealing material 5.4 to press against the partition plate 4.1 on the compartment box 4, achieving a sealing effect; pressurized gas enters the compartment box 4 through the back-blowing pipe 6.6, completing the bag filter back-blowing cleaning operation; the exhaust port 6.7 opens, and pressurized gas is discharged from the exhaust port 6.7, and the upper frame 5.1 and lower frame 5.2 return to their original shape under the action of the "spring" (elastic material); the sliding sealing component 5 rotates to the top of the next small unit 4.2, and the above process is repeated.

[0042] This invention is not limited to the above-described embodiments. Anyone should know that any structural changes made under the guidance of this invention, and any technical solutions that are the same as or similar to this invention, fall within the protection scope of this invention.

[0043] The technologies, shapes, and structures not described in detail in this invention are all known technologies.

Claims

1. A movable surface sealing method, characterized in that, Includes the following steps: 1) A compartment box is installed in the upper housing of the bag filter, which divides the outlet of the dust collector bag into several small units; 2) A sliding sealing component is provided on the upper part of the compartment box. The sliding sealing component moves and seals within a small unit. The sliding sealing component includes an upper frame, a lower frame, elastic material, sealing material, airtight tough material, and a rotating shaft. The rotating shaft is installed in the middle of the compartment box. The upper frame and the lower frame are installed on the rotating shaft. The elastic material is connected between the upper frame and the lower frame. The airtight tough material is connected to the rear of the upper frame and the lower frame. The sealing material is installed at the bottom of the lower frame. The upper frame and the lower frame drive the elastic material, sealing material, and airtight tough material to rotate through the rotating shaft to seal within different small units. 3) The sliding sealing component is equipped with an upper skeleton and a lower skeleton. The elastic material between the upper skeleton and the lower skeleton allows the sealed surface to expand and contract vertically within the small unit. 4) The upper and lower skeletons are equipped with "foldable" or "stretchable" air-impermeable tough material at their tails. After pressurized gas or fluid is filled between the upper and lower skeletons, the upper and lower skeletons overcome the elastic material and move toward the sealed surface. After the pressurized gas or fluid is released, the "foldable" or "stretchable" air-impermeable tough material returns to its original shape. 5) A sealed space is formed between the upper frame, the lower frame and the airtight tough material. The gas or fluid enters and exits this sealed space through the air supply system, and the lengthening and shortening of the sealed space are controlled to adapt to small units with different sizes of sealed surfaces. 6) On the direction of the sealed surface, install a sealing material of suitable size and thickness to the sealed surface at the bottom of the lower frame. After the lower frame is subjected to force and extends downward, the sealed surface is well sealed and meets the requirements of repeated sealing.

2. The movable surface sealing method according to claim 1, characterized in that, The bag filter in step 1) includes an upper box and a lower box. The upper box is provided with a clean air chamber and an air outlet, and the lower box is provided with an air inlet, a dust collector bag and a dust hopper. A compartment box is installed at the upper part of the connection between the upper box and the lower box. The compartment box is divided into several small units by a partition plate.

3. The movable surface sealing method according to claim 1, characterized in that, The upper part of the upper frame is equipped with pulleys via brackets. The pulleys slide in the sliding grooves, which are installed on the inner wall of the upper box.

4. The movable surface sealing method according to claim 1, characterized in that, The air supply system in step 5) includes an air intake, a fan, an air inlet pipe, an expansion pipe, a backflush pipe, and an exhaust port. The air intake is located on one side of the clean air chamber. The air intake is connected to the fan via a flexible hose. The fan is connected to the air inlet pipe via a flexible hose. The air inlet pipe extends into the middle of the rotating shaft. An air inlet is located in the middle of the air inlet pipe. The air inlet is connected to the expansion pipe and the backflush pipe. The expansion pipe enters the upper frame and is used to fill the sealed space between the upper and lower frames with air, blowing up the airtight and tough material. The backflush pipe passes through the upper and lower frames and enters the sealing material. It is used by the fan to draw air from the clean air chamber and blow it into the sealed small unit, filling the sealed small unit and the dust collection bag below with air.

5. The movable surface sealing method according to claim 4, characterized in that, The upper frame is also provided with an exhaust port, which is equipped with a sealing cover. After the dust is cleaned in the sealing unit, the exhaust port releases the gas in the sealed space between the upper and lower frames. Then, the upper and lower frames are moved by the rotating shaft to enter the next sealing unit.

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