Recirculating filter exhaust gas purification system for protection against air pollution

Abstract

A recirculating filter exhaust gas cleaning system for protection against air pollution, comprising: an exhaust pipe (10) with several outlet openings (11); several extraction devices (20) arranged at the respective outlet openings (11) of the exhaust pipe (10); a conveying device (30) comprising a first conveying circuit (31) and a second conveying circuit (32), the first conveying circuit (31) circulating through the outlet openings (11) and connected to the second conveying circuit (32) to form a two-stage recirculating filter circuit; a filter fabric (40) circulating through the two-stage recirculating filter circuit within the conveying device (30); a basin device (50) with a liquid reservoir (51); and a cleaning device (60) for brushing and cleaning the filter fabric (40). The filter fabric is moistened and absorbs water.Due to the surface tension of the water, it adheres to the filter surface structure, reducing the filter density to filter even finer molecules. Simultaneously, a layer of water forms on the surface of the filter fabric (40), which then condenses on the fabric. This barrier layer effectively traps harmful substances and absorbs odors. Activating the conveying device (30) causes the filter fabric (40) to circulate around the filter circuit, after which the purified air is discharged through the exhaust system. This achieves circular filtration and exhaust gas purification, preventing the emission of air pollution.

Description

[0001] The present invention relates to an exhaust gas purification system, in particular a recirculating filter exhaust gas purification system for protection against air pollution.

[0002] The exhaust gases and flue gases emitted from the chimney during waste incineration not only release harmful substances into the air, but also large amounts of carbon dioxide, leading to climate change and severe air pollution. It is a global problem that affects almost all aspects of human life. To solve the problem of exhaust emissions, a spraying device is usually installed on the chimney. This device absorbs dirt by spraying spray liquid to reduce the damage caused by flue gas. Although spraying water can reduce the degree of pollution, the high temperature in the chimney causes the spraying system to be easily damaged by the heat. Therefore, there is an urgent need for continuous improvement in air purification against air pollution and the improvement of incineration systems for waste disposal facilities.

[0003] The invention is based on the object of creating a circulating filter exhaust gas purification system for protection against air pollution, which avoids the above-mentioned problems by simple measures.

[0004] This object is achieved according to the invention by a recirculating filter exhaust gas purification system for protection against air pollution, which has the features specified in claim 1. Further advantageous developments of the invention emerge from the features of the subclaims.

[0005] According to the invention, a circulating filter exhaust gas purification system for protection against air pollution is provided, comprising a conveying device with a first and second conveying circuit connected to form a two-stage circulating filter circuit, wherein the filter fabric is circulated in the conveying device. The first conveying circuit, in which the filter fabric is circulated around the outlet openings of the exhaust line, ensures the implementation of a filtration phase in which pollutants such as dust, suspended particles, and other contaminants generated by combustion are filtered out. This is followed by a cleaning phase in which the filter fabric is conveyed through the second conveying circuit to a basin device and a cleaning device in order to remove the pollutants adhering to the filter fabric by brushing and cleaning. The filter fabric is moistened and absorbs water.The surface tension of the water allows it to cling to the filter surface structure and reduce the filter density, filtering out even finer molecules. At the same time, a layer of water forms on the surface of the filter mesh, which is deposited on the filter mesh. The formation of a barrier layer on the water layer effectively traps harmful substances and absorbs odors. Activating the conveyor device circulates the filter mesh around the recirculating filter circuit, after which the purified air is discharged through the exhaust devices. This achieves circular filtration and exhaust gas purification to prevent the emission of air pollution.After cleaning, the filter fabric is passed through the first conveying circuit again to complete the filtering phase, and transported to the cleaning device through the second conveying circuit to complete the cleaning phase, thereby achieving a two-stage cycle cleaning of the exhaust gas, which can contribute to reducing air pollution and avoid the existing problem of air pollution caused by exhaust emissions.

[0006] The invention and its embodiments are explained in more detail below with reference to the drawing. The drawing shows: Fig. 1 is a block diagram of a recirculating filter exhaust gas purification system according to the invention for protection against air pollution; Fig. 2 is a plan view of the circulating filter exhaust gas purification system according to the invention for protection against air pollution; Fig. 3 is a side view of the circulating filter exhaust gas purification system according to the invention for protection against air pollution; and Fig. Figure 4 is a schematic representation of the operation of the cycle flow process according to the present invention; Fig. 5 is a schematic diagram of the recirculating filter exhaust gas purification system according to the invention applied to an incinerator with exhaust emissions; Fig. 6 is a schematic partial view of the circulating filter exhaust gas purification system according to the invention, wherein the filter fabric is driven by the conveying device; Fig. 7 a side view of an alignment device according to the invention; Fig. 8 an enlarged section of Fig. 6; Fig. 9 an enlarged section of Fig. 6 in a sectional view; Fig. 10 an enlarged section of Fig. 6 in a plan view; Fig. 11 an enlarged section of Fig. 6 in a perspective view;

[0007] In Fig. 1 to Fig. Figure 4 shows a circulation filter exhaust gas purification system according to the invention for protection against air pollution, which comprises an exhaust line 10 provided with a plurality of outlet openings 11, a plurality of extraction devices 20, a conveying device 30, a filter fabric 40, a basin device 50, and a cleaning device 60. The extraction devices 20 are each arranged on the outside of the outlet openings 11 of an exhaust line 10. The conveying device 30 has a horizontally extending, first conveying circuit 31 and a vertically extending, second conveying circuit 32, which are interconnected. The first conveying circuit 31 leads through the various outlet openings 11, while the second conveying circuit 32 leads through a liquid container of the basin device 50 and the cleaning device 60. This results in a two-stage circulation filter circuit.The filter fabric 40 is a material filter fabric that is guided through the first and second conveying circuits 31, 32 of the conveying device 30. The basin device 50 is arranged below the outlet openings 11 and has a liquid container. The cleaning device 60 has several roller brushes that are arranged at a distance in the basin device 50. By using the conveying device 30, which is operated by an external power source 80, the filter fabric 40 is circulated. The first conveying circuit 31 is used to remove suspended particles and contaminants from the discharged exhaust gas through adsorption and filtration. The second conveying circuit 32 is used to clean and wash the filter fabric. By using the two-stage recirculating filter circuit, the exhaust gas from the flue is filtered and cleaned.Finally, the exhaust devices 20 are used to discharge the purified gas and thus ensure protection against air pollution.

[0008] In order to further understand the above-mentioned effect, the components and their assembly in the present invention are described in detail below: In this embodiment, a plurality of outlet openings 11 are formed along the outer peripheral wall of the exhaust duct 10 at the top. The exhaust duct includes a hollow inner tube of appropriate length, which is connected at the bottom to an inlet of a combustion furnace (not shown). This structure serves to transport the gas discharged from the combustion furnace.

[0009] The extraction devices 20 are designed as centrifugal fans. They are each arranged outside the outlet openings 11 on the exhaust line 10 and positioned opposite the outlet openings 11. The fans generate an air flow through their rotation to transport the filtered gas from the exhaust line 10 into the outside air.

[0010] The conveying device 30 consists of a first conveying circuit 31 and a second conveying circuit 32. The first conveying circuit 31 is designed as a horizontal transport channel that runs axially like the outlet openings 11 of the exhaust line 10 and is guided through the outlet openings 11. The second conveying circuit 32 is designed as a vertical transport channel that runs along the outer wall of the exhaust line 10. The first conveying circuit 31 and the second conveying circuit 32 are connected to each other and form a two-stage recirculation filter circuit.

[0011] The first and second conveyor circuits 31, 32 of the conveyor device 30 are each provided with a plurality of synchronized conveyor rollers 301 which are arranged at a certain distance and can carry out an automatic transport movement along the circular transport path consisting of the first conveyor circuit (31) and the second conveyor circuit (32).

[0012] The surface of each conveyor roller 301 of the conveyor device 30 may be provided with claws A to provide additional pulling force as the filter fabric 40 passes around the conveyor rollers 301.

[0013] The filter fabric 40 is a long strip filter fabric arranged around the first and second conveying circuits 31, 32 of the conveying device 30 and operated in a circulating motion. As the filter fabric 40 passes through the first conveying circuit 31, it extends horizontally and surrounds the outlet openings 11 of the exhaust line 10. In this way, the exhaust gas exiting the outlet openings 11 of the exhaust line 10 is filtered by the filter fabric 40 to absorb harmful substances such as microparticles and suspended particles. The purified air is then exhausted through the exhaust devices 20. As the filter fabric 40 passes through the second conveying circuit 32, it is cleaned by the basin device 50 and the cleaning device 60 to remove impurities. At this time, the filter fabric is wet and moist and absorbs water.The surface tension of the water allows it to adhere to the filter surface, reducing the filter density and enabling more effective filtration. Furthermore, the water forms a film layer on the surface of the filter mesh, which can help block harmful substances and filter unpleasant odors. The cleaned filter mesh 40 is fed back into the first conveying circuit 31 to filter the exhaust gases flowing from the exhaust line 10 to the outlet ports 11. The filter mesh 40 is then conveyed to the second conveying circuit 32 for cleaning. The filtering and cleaning processes are repeated through the first conveying circuit 31 and the second conveying circuit 32 to achieve the two-stage recirculating filter circuit.

[0014] The aforementioned filter mesh 40 can be designed as a single- or multi-layer carbon filter or as a HEPA high-efficiency filter. The filter mesh 40 can efficiently filter particles, dust, and suspended particles in the exhaust gases.

[0015] In this embodiment, the filter fabric 40 can be designed as a wet filter fabric, which allows the fabric surface to absorb water molecules. The surface tension of the water molecules can form a barrier layer on the fabric surface to capture finer, airborne particles such as PM2.5 and block odors.

[0016] The basin device 50 has a liquid container 51 that provides space for filling with an alkaline cleaning liquid. Below the bottom of the liquid container 51 are several removable dust collectors 52, each provided with a movable slide 53 at the junction between the dust collector 52 and the bottom of the liquid container 51. The dirty water generated during regular cleaning of the cleaning container of the basin device 50 can be directed into the dust collector 52 through the movable slide 53 located at the bottom of the liquid container 51.

[0017] The dust collector 52 arranged at the bottom of the cleaning container 50 can be removed, cleaned and reassembled for regular maintenance and cleaning.

[0018] The cleaning device 60 is located within the liquid container 51 of the basin device 50 and has a plurality of rollers 61, on whose outer surface brush bodies 62 are attached. These serve to automatically perform cleaning by being in contact with the filter fabric 40 as it is guided through the basin device 50.

[0019] The following refers to Fig. 6 to Fig. 11. The circulating filter exhaust gas purification system for air pollution control according to the invention further comprises an alignment device 70 consisting of a plurality of positioning seats 71 and a plurality of positioning clamps 72. The positioning seat 71 has a C-shaped opening 711, while the positioning clamp 72 is designed as a bracket and adapted to the positioning seats 71. The C-shaped opening can positively accommodate the positioning clamp 72. The positioning seat 71 is attached to both sides of each conveyor roller 301 of the first and second conveyor circuits 31, 32 of the conveyor device 30, while the positioning clamps 72 are arranged at intervals on both sides of the filter cloth 40. The positioning clamps 72 are driven by the filter cloth 40 and guided by the positioning seats 71 to correct the transport position of the filter cloth 40 and prevent displacement during operation.

[0020] The conveying device 30 consists of a horizontal first conveying circuit 31 and a vertical second conveying circuit 32, which are connected to form a two-stage circulating filter circuit. The filter fabric 40 is arranged along the two-stage circulating filter circuit. The positioning clamps 72 of the alignment device 70 are positioned parallel to each other on both sides of the first and second conveying circuits 31, 32 of the conveying device 30. The positioning clamps 72 are arranged at a distance from each other on both sides of the filter fabric 40, with the width between the positioning clamps 72 on both sides being equal to the width between the C-shaped openings 711 of the positioning seats 71 arranged parallel on both sides. By positioning the positioning clamps 72 during the circulating operation of the filter fabric 40 through the positioning seats 71, the transport path of the filter fabric 40 can be corrected.The conveyor device 30 is electrically connected to an external power source 80. During operation of the conveyor device 30, the filter fabric 40 is circulated through the two-stage recirculating filter circuit within the conveyor device 30 [see . Fig.5], wherein the filter fabric 40 is held in the predetermined transport path without allowing displacement to occur. As the filter fabric 40 is guided through the outlet openings 11 via the first conveying circuit 31, the exhaust gas is automatically cleaned by the suction of the extraction devices 20, filtering out the fine suspended particles and dust particles contained therein. The filter fabric 40 is guided through the second conveying circuit 32 through the basin device 50 and the cleaning device 60 to perform washing, rinsing, and cleaning of the filter fabric. The cleaned filter fabric 40 is returned to the first conveying circuit 31 for filtering and to the second conveying circuit 32 for cleaning, thereby forming a two-stage filtration process in which the filtration and cleaning phases alternate.At the same time, the purified gas is discharged through the exhaust devices 20 to achieve air purification and solve the problem of air pollution caused by insufficient deep purification of exhaust emissions. In this way, the recirculating filter exhaust gas purification system according to the invention effectively improves air purification and odor removal. List of reference symbols 100 Circulating filter exhaust gas purification system 10 exhaust pipe 11 Outlet opening 20 Extraction device 30 Conveyor device 301 conveyor roller 31 first conveyor circuit 32 second conveyor circuit 40 filter fabrics 50 pelvic device 51 liquid containers 52 dust collectors 53 movable slider 60 cleaning device 61 roll 62 brush bodies 70 Alignment device 71 Positioning seat A claw X1 filter phase X2 Cleaning phase

Claims

[1] Circulating filter exhaust gas purification system for protection against air pollution, comprising: an exhaust pipe (10) provided with a plurality of outlet openings (11); a plurality of extraction devices (20) arranged at the respective outlet openings (11) of the exhaust gas line (10) and located in a position opposite the outlet openings (11); a conveying device (30) having a horizontally extending first conveying circuit (31) and a vertically extending second conveying circuit (32), wherein the first conveying circuit (31) circulates through the outlet openings (11) and is connected to the second conveying circuit (32) to form a two-stage circulating filter circuit; a filter fabric (40) which can be circulated through the first conveying circuit (31) and the second conveying circuit (32) of the two-stage circulating filter circuit within the conveying device (30); a basin device (50) arranged in the second conveying circuit (32) and having a liquid container (51); a cleaning device (60) having a plurality of roller brushes arranged at a distance in the basin device (50), wherein the filter fabric (40) can be conveyed in a circulating manner by means of the conveying device (30) operated by an external power source (80), wherein a filtering phase is carried out by the filter fabric (40), which is guided through the outlet openings (11) via the first conveying circuit (31), in which air particles and dust particles are removed from the exhaust gas, and wherein a cleaning phase is carried out by the filter fabric (40), which is guided through the basin device (50) and the cleaning device (60) via the second conveying circuit (32), in which the filter fabric (40) is cleaned and brushed, whereby the cleaned filter fabric (40) is circulated into the two-stage circulating filter circuit,consisting of the first conveying circuit (31) for the filtering phase and the second conveying circuit (32) for the cleaning phase, and wherein finally the cleaned gas can be extracted through the extraction devices (20). [2] Circulating filter exhaust gas purification system for protection against air pollution according to claim 1, characterized by that the first conveying circuit (31) and the second conveying circuit (32) of the conveying device (30) are perpendicular to each other. [3] Circulating filter exhaust gas purification system for protection against air pollution according to claim 1 or 2, characterized by that the conveying device (30) is designed as a roller drive. [4] Circulating filter exhaust gas purification system for protection against air pollution according to one of the preceding claims, characterized by that the filter fabric (40) is designed as a single-layer or multi-layer composite filter fabric. [5] Circulating filter exhaust gas purification system for protection against air pollution according to claim 3, characterized by that the filter fabric (40) is designed as an activated carbon and water-resistant HEPA high-performance filter. [6] Circulating filter exhaust gas purification system for protection against air pollution according to claim 3, characterized by that the filter fabric (40) is designed as a wet filter fabric. [7] Circulating filter exhaust gas purification system for protection against air pollution according to one of the preceding claims, characterized by that the number of extraction devices (20) corresponds to the number of outlet openings (11) of the exhaust pipe (10). [8] Circulating filter exhaust gas purification system for protection against air pollution according to one of the preceding claims, characterized by that the basin device (50) is provided on the bottom side with detachably arranged dust collectors (52) which are spaced apart and detachably arranged. [9] A circulating filter exhaust gas purification system for protecting against air pollution according to any one of the preceding claims, further comprising a plurality of positioning seats (71) and positioning clamps (72), wherein the positioning seat (71) has a C-shaped opening into which the positioning clamp (72) positively engages, wherein the positioning seat (71) is mounted on both sides of each conveyor roller (301) of the first and second conveyor circuits (31, 32) of the conveyor device (30), while the positioning clamps (72) are arranged at intervals on both sides of the filter fabric (40), and wherein the positioning clamps (72) are drivable by the filter fabric (40) and are guided by the positioning seats (71).

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