Waste incineration gas purification device and method

Abstract

The invention discloses a waste incineration gas purification device and method, and relates to the technical field of gas purification. The whole supporting assembly is arranged on the dust removal box, and the supporting assembly enables the dust removal box to stand on the ground; one end of the air inlet pipe is fixed on the dust removal box and is communicated with the dust removal box; one end of the exhaust pipe is fixed at the top of the dust removal box and is communicated with the dust removal box; the whole metal filter plate is fixed in the dust removal box; the whole strip-shaped air knife is arranged on the metal filter plate. The strip-shaped air knife and the dust collecting box do reciprocating linear movement through the reciprocating assembly, meanwhile, the air supply assembly feeds air flow into the strip-shaped air knife, back flushing is conducted on the metal filter plate, dust falls into the dust collecting box and is discharged out of the dust discharging pipe, and therefore cleaning of the metal filter plate is achieved, scraping cleaning is avoided, and the cleaning efficiency is improved. And the friction damage of the metal filter plate is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of gas purification, and in particular to a garbage incineration gas purification device and method. Background Art

[0002] A garbage incinerator is a device specially used for incinerating garbage. It converts garbage into waste gas, ash, etc. through high-temperature combustion to achieve the purpose of harmless treatment and resource recovery. The working principle of a garbage incinerator is mainly to use fuels such as coal, oil, and gas to burn and carbonize the garbage at high temperatures. During the incineration process, the garbage burns in the furnace, and the waste gas generated enters the secondary combustion chamber, where it is further burned completely under the forced combustion of the burner, and then is dedusted by a spray dust collector, and finally discharged into the atmosphere through the chimney.

[0003] At present, during the use of garbage incinerators, burning garbage will produce more smoke and dust, so dust removal equipment is needed to remove dust from the smoke. For example, the Chinese invention with publication number CN219630880U discloses a gas purification device for a garbage incinerator, which relates to the technical field of gas purification devices, including a purification shell, the right side of the bottom end of the purification shell is fixedly connected with an air guide pipe, the top side of the purification shell is fixedly connected with an outlet pipe, the bottom of the purification shell is fixedly connected with a discharge mechanism, the purification shell is fixedly connected with a detachable filter mechanism, and the bottom side of the detachable filter mechanism is provided with a cleaning mechanism; the detachable filter mechanism includes a sealing plate, a filter frame, a fixing bolt, a limit block, a primary filter, a high-efficiency filter and an activated carbon filter, the sealing plate is snap-connected to the right side surface of the purification shell, the sealing plate is fixed to the side surface of the purification shell by fixing bolts, the left side of the sealing plate is fixedly connected with a filter frame, the left side of the filter frame is fixedly connected with a limit block, and the inner wall of the bottom end of the filter frame is fixedly connected with a primary filter. The gas purification device of this type of garbage incinerator is novel in design and simple in structure.

[0004] The above device also has the following disadvantages: the above device uses a scraper to remove dust from the filter screen to ensure that the filter plate can work normally, but the scraper is prone to permanent friction damage to itself and the filter plate after long-term operation, and needs to be replaced regularly, thereby increasing the dust removal cost. Summary of the invention

[0005] The object of the present invention is to provide a waste incineration gas purification device and method to solve the technical problem that in the prior art, a scraper is used to remove dust from the filter screen to ensure that the filter plate can work normally, but the scraper is prone to permanent friction damage to itself and the filter plate after long-term operation, and needs to be replaced regularly, thereby increasing the dust removal cost.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: The present invention provides a garbage incineration gas purification device, comprising: Dust removal box; A support assembly, the entirety of which is disposed on the dust removal box, and the support assembly stands the dust removal box on the ground; An air inlet pipe, one end of which is fixed on the dust removal box and communicated with the dust removal box; An exhaust pipe, one end of which is fixed to the top of the dust removal box and is connected to the dust removal box; Metal filter plate, the whole of the metal filter plate is fixed in the dust removal box; A strip air knife, the entire strip air knife is arranged on the metal filter plate, and the nozzle of the strip air knife faces the metal filter plate; An air supply assembly, the entirety of which is arranged on the dust removal box, the air supply assembly is connected to the strip air knife, and the air supply assembly delivers airflow into the strip air knife; A dust collecting box, the entire dust collecting box is arranged on the metal filter plate, and the box opening of the dust collecting box faces the metal filter plate; The reciprocating component is arranged as a whole on the dust removal box, the strip air knife and the dust collection box are connected to the reciprocating component, and the strip air knife and the dust collection box are moved back and forth in a straight line through the reciprocating component.

[0007] A further improvement of the present invention is that it also includes: A dust exhaust pipe, one end of which is connected to the bottom of the dust collecting box, and the other end of which is led out of the dust collecting box.

[0008] A further improvement of the present invention is that the support assembly comprises a welding bracket, and the top of the welding bracket is fixed to the bottom of the dust removal box.

[0009] A further improvement of the present invention is that the support assembly further comprises a plurality of universal wheels with brakes, and the plurality of universal wheels with brakes are fixed to the bottom of the welding bracket.

[0010] A further improvement of the present invention is that the air supply assembly comprises an air pump, and a hose is provided between the output end of the air pump and the input end of the strip-shaped air knife to connect the two.

[0011] A further improvement of the present invention is that the air pump is entirely fixed on the dust removal box.

[0012] A further improvement of the present invention is that the reciprocating assembly includes two guide rods, two reciprocating screw rods, a servo motor and a transmission mechanism, the two ends of the guide rods are respectively fixed on the inner walls of the dust collection box on both sides, the sliding sleeve of the outer wall of the guide rod is provided with a slider, the two sliders are respectively fixed on the strip air knife and the dust collection box as a whole, the two ends of the reciprocating screw rod are respectively rotatably installed on the inner walls of the two sides of the dust collection box, the outer wall of the reciprocating screw rod is provided with a nut sleeve matching it, the two nut sleeves are respectively fixed on the strip air knife and the dust collection box as a whole, the same end of the two reciprocating screw rods rotate synchronously through the transmission mechanism, and the output shaft of the servo motor is coaxially fixed to one of the reciprocating screw rods.

[0013] A further improvement of the present invention is that the servo motor is entirely fixed on the dust removal box.

[0014] A further improvement of the present invention is that the transmission mechanism comprises two transmission wheels and a transmission belt sleeved on the two transmission wheels, and the two transmission wheels are coaxially fixed to the two reciprocating screw rods respectively.

[0015] The present invention also provides a method for purifying waste incineration gas, comprising: The flue gas enters the dust removal box from the air inlet pipe, the metal filter plate filters out the flue gas particles, and then the filtered flue gas is discharged. The strip air knife and the dust collecting box both move back and forth in a straight line through the reciprocating assembly; at the same time, the air supply assembly sends the air flow into the strip air knife; the metal filter plate is recoiled, the dust falls into the dust collecting box and is discharged, thereby cleaning the metal filter plate.

[0016] Compared with the prior art, the present invention has at least the following beneficial technical effects: The present invention provides a waste incineration gas purification device and method, the smoke enters the dust removal box from the air inlet pipe, the metal filter plate filters out the smoke particles, and then the filtered smoke is discharged from the exhaust pipe, the strip air knife and the dust collecting box are reciprocated linearly through the reciprocating component, and at the same time the air supply component sends the air flow into the strip air knife to recoil the metal filter plate, the dust falls into the dust collecting box and is discharged from the dust exhaust pipe, thereby cleaning the metal filter plate, avoiding scraping and cleaning, and avoiding friction damage to the metal filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a three-dimensional structure from a first viewing angle of the present invention; Figure 2 is a schematic diagram of a second viewing angle stereoscopic structure of the present invention; Figure 3 It is a schematic diagram of the internal three-dimensional structure of the present invention; Figure 4 yes Figure 3 A side view structural schematic diagram of; Figure 5 yes Figure 3 A is an enlarged structural diagram of FIG.

[0018] Description of reference numerals: 1. Dust removal box; 2. Air inlet pipe; 3. Exhaust pipe; 4. Support assembly; 5. Welding bracket; 6. Universal wheel with brake; 7. Servo motor; 8. Metal filter plate; 9. Guide rod; 10. Strip air knife; 11. Reciprocating screw rod; 12. Transmission belt; 13. Transmission wheel; 14. Dust exhaust pipe; 15. Dust collection box; 16. Air pump. DETAILED DESCRIPTION

[0019] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0025] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0026] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0027] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0028] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] Example 1 like Figures 1 to 5 As shown, this embodiment provides a garbage incineration gas purification device, comprising: Dust removal box 1; A support assembly 4, wherein the entire support assembly 4 is disposed on the dust removal box 1, and the support assembly 4 makes the dust removal box 1 stand on the ground; An air inlet pipe 2, one end of which is fixed on the dust removal box 1 and communicated with the dust removal box 1; An exhaust pipe 3, one end of which is fixed to the top of the dust removal box 1 and communicated with the dust removal box 1; A metal filter plate 8, the entire metal filter plate 8 is fixed in the dust removal box 1; A strip-shaped air knife 10, wherein the entire strip-shaped air knife 10 is disposed on the metal filter plate 8, and the nozzle of the strip-shaped air knife 10 faces the metal filter plate 8; An air supply assembly, the entirety of which is disposed on the dust removal box 1, the air supply assembly is connected to the strip air knife 10, and the air supply assembly delivers airflow into the strip air knife 10; A dust collecting box 15, the entire dust collecting box 15 is disposed on the metal filter plate 8, and the box opening of the dust collecting box 15 faces the metal filter plate 8; A dust exhaust pipe 14, one end of which is connected to the bottom of the dust collecting box 15, and the other end of which is led out of the dust collecting box 1; The reciprocating assembly is disposed as a whole on the dust removal box 1, the strip air knife 10 and the dust collection box 15 are both connected to the reciprocating assembly, and the strip air knife 10 and the dust collection box 15 are both reciprocated linearly moved through the reciprocating assembly.

[0030] From the above connection relationship, it can be known that: the flue gas enters the dust removal box 1 from the air inlet pipe 2, the metal filter plate 8 filters out the flue gas particles, and then the filtered flue gas is discharged from the exhaust pipe 3, the strip air knife 10 and the dust box 15 are both reciprocated linearly through the reciprocating component, and at the same time the air supply component sends the air flow into the strip air knife 10 to recoil the metal filter plate 8, and the dust falls into the dust box 15 and is discharged from the dust exhaust pipe 14, thereby cleaning the metal filter plate 8, avoiding scraping and cleaning, and avoiding friction damage to the metal filter plate 8.

[0031] The flue gas enters the dust removal box 1 from the air inlet pipe 2, which is the starting point of the entire dust removal process. The flue gas is filtered through the metal filter plate 8 in the dust removal box 1. The metal filter plate can effectively intercept particulate matter in the flue gas with its efficient filtering performance, ensuring that the discharged flue gas meets environmental protection standards. The clean flue gas filtered by the metal filter plate 8 is discharged from the exhaust pipe 3 and enters subsequent treatment or is directly discharged into the atmosphere. In order to maintain the filtering efficiency of the metal filter plate 8 and prevent clogging, the system is equipped with a cleaning mechanism. This mechanism includes a strip air knife 10, a dust collecting box 15, a reciprocating assembly and an air supply assembly. The strip air knife 10 and the dust collecting box 15 are both reciprocated linearly through the reciprocating assembly. This movement mode ensures that the cleaning process can fully cover the surface of the metal filter plate 8 and avoid cleaning dead corners. The air supply assembly sends the airflow into the strip air knife 10 to form a strong airflow. This airflow directly acts on the surface of the metal filter plate 8, and blows off the dust particles attached to the filter plate through the recoil action. The blown-off dust particles fall into the dust collecting box 15 below. As dust accumulates in the dust collecting box, the dust can be discharged regularly through the dust exhaust pipe 14 to keep the system clean and running efficiently.

[0032] In this embodiment, the support assembly 4 includes a welding bracket 5, the top of the welding bracket 5 is fixed to the bottom of the dust removal box 1; from the above connection relationship, it can be seen that the welding bracket 5 stands the entire dust removal box 1 on the ground.

[0033] In this embodiment, the support assembly 4 also includes a plurality of universal wheels with brakes 6, which are fixed to the bottom of the welding bracket 5; from the above connection relationship, it can be known that the entire device is moved by the universal wheels with brakes 6.

[0034] In this embodiment, the air supply component includes an air pump 16, and the entire air pump 16 is fixed on the dust removal box 1. A hose is provided between the output end of the air pump 16 and the input end of the strip air knife 10 to connect the two. From the above connection relationship, it can be seen that the air pump 16 generates a high-pressure airflow and delivers it into the strip air knife 10 through the hose.

[0035] In this embodiment, the reciprocating assembly includes two guide rods 9, two reciprocating screw rods 11, a servo motor 7 and a transmission mechanism. The two ends of the guide rod 9 are respectively fixed on the inner walls of the dust removal box 1 on both sides, and the outer wall of the guide rod 9 is slidingly sleeved with a slider. The two sliders are respectively fixed on the strip air knife 10 and the dust collection box 15 as a whole. The two ends of the reciprocating screw rod 11 are rotatably installed on the inner walls of the dust removal box 1 on both sides, and the outer wall of the reciprocating screw rod 11 is provided with a nut sleeve matching it. The two nut sleeves are respectively fixed on the strip air knife 10 and the dust collection box 15 as a whole. The same end of the two reciprocating screw rods 11 rotates synchronously through the transmission mechanism. The servo motor 7 is fixed on the dust removal box 1 as a whole, and the output shaft of the servo motor 7 is coaxially fixed with one of the reciprocating screw rods 11. The transmission mechanism includes two transmission wheels 13 and a transmission belt 12 sleeved on the two transmission wheels 13. The two transmission wheels 13 are respectively coaxially fixed with the two reciprocating screw rods 11.

[0036] From the above connection relationship, it can be known that the servo motor 7 drives the reciprocating screw 11 fixed thereto to perform axial rotation through the output shaft, the two reciprocating screws 11 rotate synchronously through the transmission mechanism, and the two reciprocating screws 11 respectively drive the strip air knife 10 and the dust box 15 to perform reciprocating linear movement through the nut sleeve.

[0037] When the servo motor 7 is started, its output shaft drives the reciprocating screw 11 to rotate axially. Through the transmission mechanism, the two reciprocating screws 11 rotate synchronously. Driven by the reciprocating screw, the nut sleeve moves back and forth in a straight line along the axial direction. The strip air knife 10 and the dust collecting box 15 move back and forth in a straight line along their respective nut sleeves, thereby achieving comprehensive coverage and cleaning of the entire dust removal area.

[0038] Example 2 like Figures 1 to 5 As shown, this embodiment provides a method for purifying waste incineration gas, comprising: The flue gas enters the dust removal box 1 from the air inlet pipe 2, the metal filter plate 8 filters out the flue gas particles, and then the filtered flue gas is discharged, the strip air knife 10 and the dust box 15 both move back and forth in a straight line through the reciprocating assembly; at the same time, the air supply assembly sends the airflow into the strip air knife 10; the metal filter plate 8 is recoiled, the dust falls into the dust box 15 and is discharged, thereby cleaning the metal filter plate 8.

[0039] The flue gas containing particulate matter enters the dust removal box 1 through the air inlet pipe 2. In the dust removal box 1, the metal filter plate 8 acts as a filter medium to effectively intercept and filter out the particulate matter in the flue gas. The metal filter plate can maintain a high filtering efficiency after long-term operation due to its high filtering performance and durability. The clean flue gas filtered by the metal filter plate 8 is discharged through the exhaust pipe of the dust removal box 1 and enters the subsequent treatment or is directly discharged into the atmosphere.

[0040] Example 3 like Figures 1 to 5 As shown, this embodiment provides a method for purifying waste incineration gas, comprising: The flue gas enters the dust removal box 1 from the air inlet pipe 2, and the metal filter plate 8 filters out the flue gas particles, and then the filtered flue gas is discharged from the exhaust pipe 3. The strip air knife 10 and the dust box 15 are both reciprocated linearly through the reciprocating assembly, that is, the servo motor 7 drives the reciprocating screw 11 fixed thereto to rotate axially through the output shaft, and the two reciprocating screws 11 rotate synchronously through the transmission mechanism. The two reciprocating screws 11 respectively drive the strip air knife 10 and the dust box 15 to reciprocate linearly through the nut sleeve; at the same time, the air supply assembly sends the airflow into the strip air knife 10, that is, the air pump 16 generates a high-pressure airflow and sends it into the strip air knife 10 through a hose; the metal filter plate 8 is recoiled, and the dust falls into the dust box 15 and is discharged from the dust exhaust pipe 14, thereby realizing the cleaning of the metal filter plate 8, avoiding scraping and cleaning, and avoiding friction damage to the metal filter plate 8.

[0041] Among them, in dust removal, backwash cleaning of the metal filter plate 8 is an efficient and protective maintenance method. The dust particles attached to the filter plate are blown off by the backwash airflow and collected in the dust collecting box 15, and finally discharged through the dust exhaust pipe 14. This process not only effectively cleans the filter plate, but also avoids the friction damage that may be caused by traditional scraping cleaning.

[0042] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0043] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A garbage incineration gas purification device, characterized in that: include: Dust removal box (1); A support assembly (4), wherein the entire support assembly (4) is disposed on the dust removal box (1), and the support assembly (4) places the dust removal box (1) on the ground; An air intake pipe (2), one end of the air intake pipe (2) being fixed on the dust removal box (1) and being in communication with the dust removal box (1); An exhaust pipe (3), one end of the exhaust pipe (3) being fixed to the top of the dust removal box (1) and being in communication with the dust removal box (1); A metal filter plate (8), wherein the entire metal filter plate (8) is fixed in the dust removal box (1); A strip-shaped air knife (10), wherein the entirety of the strip-shaped air knife (10) is disposed on the metal filter plate (8), and a nozzle of the strip-shaped air knife (10) is directed toward the metal filter plate (8); An air supply assembly, the air supply assembly being disposed as a whole on the dust removal box (1), the air supply assembly being connected to the strip-shaped air knife (10), and the air supply assembly supplies airflow into the strip-shaped air knife (10); A dust collecting box (15), wherein the dust collecting box (15) is entirely arranged on the metal filter plate (8), and the box opening of the dust collecting box (15) faces the metal filter plate (8); A reciprocating component, wherein the entire reciprocating component is arranged on the dust removal box (1), the strip-shaped air knife (10) and the dust collection box (15) are both connected to the reciprocating component, and the strip-shaped air knife (10) and the dust collection box (15) are both reciprocated linearly through the reciprocating component.

2. A garbage incineration gas purification device according to claim 1, characterized in that: Also includes: A dust exhaust pipe (14), one end of which is connected to the bottom of the dust collecting box (15), and the other end of which is led out of the dust removal box (1).

3. The garbage incineration gas purification device according to claim 1, characterized in that: The support assembly (4) comprises a welding bracket (5), and the top of the welding bracket (5) is fixed to the bottom of the dust removal box (1).

4. A garbage incineration gas purification device according to claim 3, characterized in that: The support assembly (4) further comprises a plurality of universal wheels with brakes (6), and the plurality of universal wheels with brakes (6) are fixed to the bottom of the welding bracket (5).

5. The garbage incineration gas purification device according to claim 1, characterized in that: The air supply assembly comprises an air pump (16), and a hose is provided between the output end of the air pump (16) and the input end of the strip-shaped air knife (10) to connect the two.

6. A garbage incineration gas purification device according to claim 5, characterized in that: The air pump (16) is entirely fixed on the dust removal box (1).

7. The garbage incineration gas purification device according to claim 1, characterized in that: The reciprocating assembly comprises two guide rods (9), two reciprocating screw rods (11), a servo motor (7) and a transmission mechanism, wherein the two ends of the guide rod (9) are respectively fixed to the inner walls of the dust removal box (1) on both sides, the outer wall of the guide rod (9) is provided with a sliding block, and the two sliding blocks are respectively fixed to the strip air knife (10) and the dust collection box (15) as a whole, and the two ends of the reciprocating screw rod (11) are respectively rotatably mounted on the inner walls of the dust removal box (1) on both sides, and the outer wall of the reciprocating screw rod (11) is provided with a matching nut sleeve, and the two nut sleeves are respectively fixed to the strip air knife (10) and the dust collection box (15) as a whole, and the same end of the two reciprocating screw rods (11) is synchronously rotated through the transmission mechanism, and the output shaft of the servo motor (7) is coaxially fixed to one of the reciprocating screw rods (11).

8. The garbage incineration gas purification device according to claim 7, characterized in that: The entirety of the servo motor (7) is fixed on the dust removal box (1).

9. The garbage incineration gas purification device according to claim 7, characterized in that: The transmission mechanism comprises two transmission wheels (13) and a transmission belt (12) sleeved on the two transmission wheels (13); the two transmission wheels (13) are coaxially fixed to the two reciprocating screw rods (11), respectively.

10. A method for purifying waste incineration gas, characterized in that: The method is based on a waste incineration gas purification device according to any one of claims 1 to 9, comprising: The flue gas enters the dust removal box (1) from the air inlet pipe (2), the metal filter plate (8) filters out the flue gas particles, and then the filtered flue gas is discharged. The strip air knife (10) and the dust collecting box (15) are both reciprocated linearly through the reciprocating assembly; at the same time, the air supply assembly sends the air flow into the strip air knife (10); the metal filter plate (8) is backwashed, and the dust falls into the dust collecting box (15) and is discharged, thereby achieving the cleaning of the metal filter plate (8).

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