Oxidation filtering assembly and dust removal and denitration decomposition device applying same

Abstract

The utility model discloses an oxidation filtration assembly and a dedusting denitration decomposition device using the same, and relates to the technical field of flue gas treatment, the oxidation filtration assembly comprises a box body, an oxidation chamber and a filtration chamber which are communicated with each other are arranged in the box body, and a waste gas pipe and an ozone pipe are arranged in the oxidation chamber; a filter cartridge is arranged in the filter chamber, the filter cartridge comprises a filter area and a pollution discharge area, a filter screen is arranged in the filter area, and a filtered gas outlet pipe is arranged in the pollution discharge area; an outer dirt scraping component arranged on the outer end side of the filter screen and an inner dirt scraping component arranged on the inner end side of the filter screen are connected to the filter screen, and the outer dirt scraping component and the inner dirt scraping component reciprocate in the filter area in the axial direction of the filter cartridge and scrape the surface of the filter screen. According to the oxidation filtering assembly and the dust removal and denitration decomposition device, through the outer dirt scraping component and the inner dirt scraping component which move in the filtering area in a reciprocating mode, cleaning work of the filtering net can be completed in the flue gas oxidation filtering process, and the flue gas treatment efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, in particular to an oxidation filtering component and a dust removal and denitration decomposition device using the same. Background Art

[0002] With the rapid development of the nonferrous metal industry and the increasingly severe situation of environmental protection, the flue gas generated by boiler equipment such as coal-fired boilers and gas-fired boilers has become the focus of environmental supervision, and the nitrogen oxides contained in the flue gas are one of the key control indicators in environmental supervision. However, the flue gas generated by boiler equipment such as coal-fired boilers and gas-fired boilers has the characteristics of large excess air volume, high nitrate emission concentration and large ash volume, which makes its denitrification work face arduous challenges.

[0003] At present, the decomposition furnace used for flue gas denitrification in the industry generally performs the final filtration of the gas through the cooperation between the caustic soda box and the strong alkali inside to ensure that the discharged gas is free of pollutants, solving the problem of incomplete removal of nitrates in the flue gas. The dust removal and denitrification reactor in the decomposition furnace generally needs to filter the large particles in the flue gas before entering the denitrification device for denitrification operations to ensure that the gas entering the caustic soda box will not carry large particles, so as to avoid incomplete denitrification reaction due to impurities carried by the gas. Therefore, filtering large particles in the flue gas is an important part of the flue gas denitrification work.

[0004] However, the existing dust removal and denitrification decomposition furnace generally adopts the method of directly dismantling the filter device to clean the large particles on the surface of the filter. The denitrification operation cannot be performed during the cleaning process. Moreover, the disassembly and assembly of the filter requires manual operation, and the disassembly and assembly steps are cumbersome, which results in low efficiency and labor-intensive cleaning of the existing filter device. Utility Model Content

[0005] The utility model aims to provide an oxidation filter component and a dust removal and denitration decomposition device using the oxidation filter component, wherein the oxidation filter device can conveniently remove dirt on the filter net to solve the problem of inconvenient cleaning of the filter device in the existing dust removal and denitration decomposition furnace.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An oxidation filtration component comprises a housing, wherein an oxidation chamber and a filtration chamber connected to each other are arranged in the housing, wherein:

[0008] The oxidation chamber is provided with an exhaust pipe for introducing the flue gas to be treated and an ozone tube for introducing ozone;

[0009] A filter cartridge is arranged in the filter chamber, and the filter cartridge includes a filter area connected to the filter chamber and a sewage discharge area isolated from the filter chamber. A filter screen for filtering smoke is arranged in the filter area, and a filter gas outlet pipe connecting the inside of the filter cartridge and the outside of the box is arranged in the sewage discharge area.

[0010] The filter net is connected to an outer scraping component arranged on the outer end side of the filter net and an inner scraping component arranged on the inner end side of the filter net. The outer scraping component and the inner scraping component surround the circumference of the filter cylinder, and the outer scraping component and the inner scraping component reciprocate along the axial direction of the filter cylinder in the filter area, scraping the outer surface and inner surface of the filter net respectively.

[0011] In some embodiments, a baffle for guiding the flow path of smoke is disposed between the oxidation chamber and the filtration chamber, and a passage for smoke to pass is formed between the baffle and the top of the box.

[0012] In some embodiments, the outlet of the exhaust pipe is adjacent to the outlet of the ozone pipe, and the outlet of the exhaust pipe is below the outlet of the ozone pipe.

[0013] In some embodiments, the sewage discharge area is located below the filtration area, and an internal sewage discharge hopper is provided in the sewage discharge area. One end of the internal sewage discharge hopper is connected to the filtration area, and the other end is provided with an internal sewage discharge port. Along the direction from the filtration area to the sewage discharge area, the inner wall of the internal sewage discharge hopper gradually converges to the internal sewage discharge port; the filtered air outlet pipe is connected to the internal sewage discharge hopper.

[0014] In some embodiments, the box body is provided with an external sewage hopper, which is arranged around the filter cartridge, and one end of the external sewage hopper is connected to the filter chamber, and the other end is provided with an external sewage outlet; along the direction from the filter area to the sewage discharge area, the inner wall of the external sewage hopper gradually converges to the external sewage outlet.

[0015] In some embodiments, the external scraping component includes a plurality of external scraping members, which are arranged at intervals along the axial direction of the filter cylinder on the outer end side of the filter net, an external passage area for smoke to pass through is formed between two adjacent external scraping members, and an external connecting member located in the external passage area is connected between the two adjacent external scraping members, so that the two adjacent external scraping members move synchronously.

[0016] In some embodiments, the internal scraping assembly includes a plurality of internal scraping parts, which are arranged at intervals along the axial direction of the filter cylinder on the inner end side of the filter net, an inner passage area for smoke to pass through is formed between two adjacent internal scraping parts, and an inner connecting part located in the inner passage area is connected between the two adjacent internal scraping parts, so that the two adjacent internal scraping parts move synchronously.

[0017] In some embodiments, a transmission member for driving the outer scraping member and the inner scraping member to move synchronously is provided on the housing, and the transmission member includes a transmission shaft rotatable relative to the housing, and an inner clamping member and an outer clamping member capable of reciprocating along the axial direction of the filter cartridge, wherein:

[0018] The transmission shaft penetrates the filter cartridge along the radial direction of the filter cartridge, and the transmission shaft is formed with crankshaft parts at the inner end side and the outer end side of the filter cartridge respectively;

[0019] The inner clamping member is arranged inside the filter cartridge and is clamped and connected with the crankshaft portion located at the inner end side of the filter cartridge, and the inner clamping member is connected with the inner scraping member;

[0020] The outer clamping piece is arranged outside the filter cartridge and is clamped and connected with the crankshaft portion located at the outer end side of the filter cartridge, and the outer clamping piece is connected with the outer dirt scraping component.

[0021] In some embodiments, both the outer clamping member and the inner clamping member are provided with a clearance space for avoiding the transmission shaft.

[0022] The utility model also provides a dust removal and denitration decomposition device using the above-mentioned oxidation filter component, which includes the above-mentioned oxidation filter component, denitration component, and oil removal component, wherein:

[0023] The denitrification component includes a denitrification box filled with an alkaline solution, the denitrification box is connected to the filtered gas outlet pipe, and is connected to the deoiling component through the denitrification outlet pipe;

[0024] The oil removal component comprises an oil removal tank filled with caustic soda solution, the oil removal tank is connected to a denitrification outlet pipe, and an exhaust pipe is arranged on the oil removal tank.

[0025] Compared with the prior art, the oxidation filter assembly and the dust removal and denitration decomposition device using the oxidation filter assembly implemented by the utility model have the following beneficial effects:

[0026] (1) The oxidation filter assembly can clean the filter screen during the process of smoke oxidation filtration by means of an outer scraping member and an inner scraping member that reciprocate in the filtration area. The filter screen does not need to be stopped for smoke treatment, which can effectively improve the efficiency of smoke treatment. The filter screen does not need to be disassembled, thereby improving the efficiency of cleaning the filter device.

[0027] (2) The outer scraping member and the inner scraping member of the oxidation filter assembly clean the outer end side and the inner end side of the filter respectively, which can ensure the cleanliness of both sides of the filter and prevent the filter holes on the filter from being blocked by large particles of smoke, thereby affecting the filtering effect of the smoke;

[0028] (3) The oxidation and filtration components utilize interconnected oxidation chambers and filtration chambers, so that the oxidation treatment and large particle impurity treatment in the flue gas treatment step can be carried out in the same box, and no additional box is required for the oxidation step;

[0029] (4) The dust removal and denitrification device is based on the application of oxidation filtration components, which can simplify the device structure of the dust removal and denitrification device and avoid the problem of flue gas treatment being unable to be carried out due to the need to clean the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of an oxidation filter assembly in an embodiment of the utility model;

[0031] Figure 2 is a cross-sectional view of an oxidation filter assembly in an embodiment of the utility model;

[0032] Figure 3 yes Figure 2 A partial enlarged view of middle A;

[0033] Figure 4 yes Figure 2 A partial enlarged view of B in the middle;

[0034] Figure 5 It is a schematic diagram of a filter cartridge in an embodiment of the utility model;

[0035] Figure 6 is an internal schematic diagram of an oxidation filter assembly in an embodiment of the utility model;

[0036] Figure 7 yes Figure 6 A partial enlarged view of middle C;

[0037] Figure 8 yes Figure 6 A partial enlarged view of D in the middle;

[0038] Fig. 9 It is a schematic diagram of a dust removal and denitrification device in an embodiment of the utility model.

[0039] In the figure,

[0040] 1A, oxidation filter assembly; 1a, housing; 10a, oxidation chamber; 11a, filter chamber; 12a, external sewage hopper; 120a, external sewage outlet; 121a, external end cover; 2a, baffle; 3a, channel; 4a, exhaust pipe; 5a, ozone tube; 6a, filter cartridge; 60a, filter area; 61a, sewage area; 62a, filter screen; 63a, internal sewage hopper; 630a, internal sewage outlet; 631a, internal end cover; 64a, filter outlet pipe; 7a, external scraper; 70a, external scraper; 71a, external passage area; 72a, external connection member; 73a, avoidance space; 8a, internal scraping member; 80a, internal scraping member; 81a, internal passage area; 82a, internal connection member; 9a, transmission member; 90a, motor; 91a, transmission shaft; 910a, crankshaft; 92a, internal clamping member; 920a, internal clamping rod; 921a, internal clamping space; 93a, external clamping member; 930a, external clamping rod; 931a, external clamping space; 932a, connecting rod; 94a, internal sliding rod; 95a, internal sleeve rod; 96a, external guide groove;

[0041] 2B, denitrification assembly; 1b, denitrification box; 2b, denitrification outlet pipe;

[0042] 3c, degreasing assembly; 1c, degreasing tank; 2c, exhaust pipe. DETAILED DESCRIPTION

[0043] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0044] In the description of the present utility model, it should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0045] In the description of the present invention, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] In the description of the present invention, it should be understood that the terms "first" and "second" are used in the present invention for descriptive purposes only and cannot 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.

[0047] like Figure 1-8 As shown, an oxidation filtration component 1A preferably implemented in the utility model includes a box body 1a, in which an oxidation chamber 10a and a filtration chamber 11a which are interconnected are arranged, a baffle 2a for guiding the flow path of smoke is arranged between the oxidation chamber 10a and the filtration chamber 11a, the bottom of the baffle 2a is fixed and sealed to the bottom of the box body 1a, and a channel 3a for smoke to pass is formed between the top of the baffle 2a and the top of the box body 1a.

[0048] The oxidation chamber 10a is provided with a waste gas pipe 4a for introducing the flue gas to be treated and an ozone tube 5a for introducing ozone, and the outlet of the waste gas pipe 4a is adjacent to the outlet of the ozone tube 5a, and the outlet of the waste gas pipe 4a is below the outlet of the ozone tube 5a.

[0049] Since the main component of flue gas is nitric oxide, the density of ozone is generally higher than that of flue gas in the atmospheric environment. When ozone is introduced from the ozone tube 5a and flue gas is introduced from the exhaust pipe 4a, the rising and diffusion speed of flue gas is higher than that of ozone. By placing the outlet of the exhaust pipe 4a below the outlet of the ozone tube 5a and combining the flow-guiding design of the baffle 2a, flue gas and ozone can only rise along the guiding direction of the baffle 2a, so that flue gas can contact odor more fully, nitrogen oxides in flue gas can react more fully with ozone, and ozone oxidizes nitrogen oxides in flue gas into nitrogen dioxide.

[0050] In this embodiment, Figure 2-5As shown, a filter cartridge 6a is arranged in the filter chamber 11a, and the top of the filter cartridge 6a is fixed and sealed to the top of the housing 1a. The filter cartridge 6a includes a filter area 60a connected to the filter chamber 11a, and a sewage discharge area 61a isolated from the filter chamber 11a. A filter screen 62a for filtering smoke is arranged in the filter area 60a, and the filter screen 62a is arranged along the circumference of the filter cartridge 6a. Along the axial direction of the filter cartridge 6a, the sewage discharge area 61a is located below the filter area 60a.

[0051] like Figure 2-8 As shown, the filter screen 62a is connected to an outer scraping member 7a arranged at the outer end side of the filter screen 62a, and an inner scraping member 8a arranged at the inner end side of the filter screen 62a. The outer scraping member 7a and the inner scraping member 8a reciprocate along the axial direction of the filter cylinder 6a in the filter area 60a, and scrape the outer surface and the inner surface of the filter screen 62a respectively; wherein,

[0052] The outer scraping member 7a is arranged around the circumference of the filter cartridge 6a, and includes a plurality of outer scraping pieces 70a, which are arranged at intervals along the axial direction of the filter cartridge 6a on the outer end side of the filter screen 62a, and an outer passage area 71a for smoke to pass through is formed between two adjacent outer scraping pieces 70a, and an outer connecting piece 72a located in the outer passage area 71a is connected between the two adjacent outer scraping pieces 70a, so that the two adjacent outer scraping pieces 70a move synchronously;

[0053] The internal scraping member 8a is arranged around the circumference of the filter cartridge 6a, and includes a plurality of internal scraping parts 80a, which are arranged at intervals along the axial direction of the filter cartridge 6a on the inner end side of the filter screen 62a, and an internal passage area 81a for smoke to pass through is formed between two adjacent internal scraping parts 80a, and an internal connecting member 82a located in the internal passage area 81a is connected between the two adjacent internal scraping parts 80a, so that the two adjacent internal scraping parts 80a move synchronously.

[0054] When the flue gas after oxidation treatment enters the filter chamber 11a from the oxidation chamber 10a, since the sewage discharge area 61a is isolated from the filter chamber 11a, and the top of the filter cartridge 6a is sealed and connected to the top of the box body 1a, the flue gas will pass through the filter mesh 62a arranged in the filter area 60a and enter the interior of the filter cartridge 6a, so that the large particles in the flue gas are filtered by the filter mesh 62a, and the filtered flue gas is discharged from the oxidation filter assembly 1A through the filter outlet pipe 64a.

[0055] When a large amount of large particles accumulate on the filter 62a, the outer scraping member 7a and the inner scraping member 8a move back and forth in the filter area 60a to scrape the surface of the filter 62a. The large particles attached to the outer end side and the inner end side of the filter 62a will be scraped off by the outer scraping member 7a and the inner scraping member 8a, so that the filter 62a remains clean.

[0056] It should be noted that, in the present embodiment, the inner scraper 80a and the outer scraper 70a are arranged flush in the horizontal direction, so that when the inner scraper 80a and the outer scraper 70a are cleaning the inner and outer ends of the filter 62a, the outer passage area 71a and the inner passage area 81a in the same horizontal area are connected, and the smoke can directly pass from the outer end side of the filter 62a to the inner end side of the filter 62a. In some embodiments, the inner scraper 80a and the outer scraper 70a can also be staggered in the horizontal direction, so that the outer passage area 71a, the inner passage area 81a and the filter 62a form a maze-like filtering path, thereby improving the filtering effect of the smoke.

[0057] like Figure 2-8 As shown, in this embodiment, a transmission member 9a for driving the outer scraping member 7a and the inner scraping member 8a to move synchronously is provided on the housing 1a, and the transmission member 9a includes a motor 90a, a transmission shaft 91a rotatable relative to the housing 1a, an inner clamping member 92a located inside the filter cartridge 6a, and an outer clamping member 93a located outside the filter cartridge 6a, wherein:

[0058] The transmission shaft 91a penetrates the filter cartridge 6a in the radial direction of the filter cartridge 6a and is connected to the output end of the motor 90a. When the motor 90a is in operation, the transmission shaft 91a rotates under the drive of the motor 90a. The transmission shaft 91a is formed with a crankshaft portion 910a extending along the axial direction of the filter cartridge 6a at the inner end side and the outer end side of the filter cartridge 6a respectively.

[0059] The inner clamping member 92a includes two inner clamping rods 920a, which are arranged in parallel with each other inside the filter cartridge 6a, and the two inner clamping rods 920a are connected to the same inner scraper 80a, and an inner clamping space 921a is formed between the two inner clamping rods 920a; the crankshaft portion 910a located at the inner end side of the filter cartridge 6a is arranged in the inner clamping space 921a and clamped by the two inner clamping rods 920a;

[0060] The outer clamping member 93a includes four outer clamping rods 930a, each two outer clamping rods 930a form a group, and the two groups of outer clamping rods 930a are respectively arranged on both sides of the radial direction of the filter cartridge 6a; the outer clamping rods 930a of the same group are arranged parallel to each other on the outside of the filter cartridge 6a, and the outer clamping rods 930a of the same group are connected to the outer scraper 70a through a connecting rod 932a, and an outer clamping space 931a is formed between the two outer clamping rods 930a of the same group; the crankshaft portion 910a located on the outer end side of the filter cartridge 6a is respectively arranged in the two outer clamping spaces 931a and clamped by the two groups of outer clamping rods 930a.

[0061] In this embodiment, an inner slide bar 94a and an inner sleeve bar 95a arranged along the axial direction of the filter cartridge 6a are provided inside the filter cartridge 6a, and the inner clamping member 92a is connected to the inner slide bar 94a, and the inner slide bar 94a is inserted into the inner sleeve bar 95a, so that the inner clamping member 92a can reciprocate along the axial direction of the filter cartridge 6a. An outer guide groove 96a arranged along the axial direction of the filter cartridge 6a is provided outside the filter cartridge 6a, and the outer clamping member 93a is slidably connected to the outer guide groove 96a, so that the outer clamping member 93a can reciprocate along the axial direction of the filter cartridge 6a.

[0062] Based on the aforementioned outer scraping member 7a, inner scraping member 8a, and transmission member 9a, when the motor 90a is in motion, the transmission shaft 91a will rotate under the drive of the motor 90a, driving each crankshaft portion 910a to rotate around the central axis of the transmission shaft 91a. When the crankshaft portion 910a rotates, the crankshaft portion 910a will drive the correspondingly connected inner clamping member 92a and outer clamping member 93a to move synchronously, and under the guidance and restriction of the inner slide bar 94a and the outer guide groove 96a, the circumferential rotation of the crankshaft will be converted into the linear movement of the inner clamping member 92a and the outer clamping member 93a, so that the inner clamping member 92a and the outer clamping member 93a move back and forth along the axial direction of the filter cartridge 6a, thereby driving the inner scraping member 8a and the outer scraping member 7a to move back and forth along the axial direction of the filter cartridge 6a. By adjusting and setting the distance between the inner scraping member 8a and the outer scraping member 7a and the surface of the filter screen 62a, when the inner scraping member 8a and the outer scraping member 7a move back and forth along the axial direction of the filter cylinder 6a, the inner scraping member 8a and the outer scraping member 7a can scrape on the surface of the filter screen 62a, thereby scraping away the large particles attached to the inner end side surface and the outer end side surface of the filter screen 62a, thereby completing the cleaning of the inner end side surface and the outer end side surface of the filter screen 62a.

[0063] Since the inner scraping member 8a and the outer scraping member 7a will reciprocate along the axial direction of the filter cartridge 6a when cleaning the filter screen 62a, in order to avoid the inner scraping member 8a and the outer scraping member 7a from interfering with the transmission shaft 91a during the movement process, thereby affecting the cleaning action of the inner scraping member 8a and the outer scraping member 7a, in this embodiment, both the outer clamping member 93a and the inner clamping member 92a are provided with a clearance space 73a that avoids the transmission shaft 91a. When the inner scraping member 8a and the outer scraping member 7a reciprocate along the axial direction of the filter cartridge 6a, the clearance space 73a can ensure that the transmission shaft 91a passes smoothly through the inner scraping member 80a and the outer scraping member 70a, thereby avoiding the inner scraping member 8a and the outer scraping member 7a from interfering with the transmission shaft 91a during the movement process.

[0064] In this embodiment, an inner sewage hopper 63a is provided in the sewage discharge area 61a, one end of which is connected to the filter area 60a, and the other end is provided with an inner sewage outlet 630a. Along the direction from the filter area 60a to the sewage discharge area 61a, the inner wall of the inner sewage hopper 63a gradually converges to the inner sewage outlet 630a, and a detachable inner end cover 631a is provided in the inner sewage outlet 630a. The inner sewage hopper 63a is also connected to a filtered air outlet pipe 64a, which connects the inside of the filter cartridge 6a with the outside of the box body 1a.

[0065] The housing 1a is also provided with an external sewage hopper 12a, which is arranged around the sewage discharge area 61a of the filter cartridge 6a. One end of the external sewage hopper 12a is connected to the filter chamber 11a, and the other end is provided with an external sewage outlet 120a. Along the direction from the filter area 60a to the sewage discharge area 61a, the inner wall of the external sewage hopper 12a gradually converges to the external sewage outlet 120a, and a detachable external end cover 121a is provided in the external sewage outlet 120a.

[0066] Through the design of the inner sewage hopper 63a and the outer sewage hopper 12a, when the inner sewage scraping component 8a and the outer sewage scraping component 7a clean the filter screen 62a, the scraped large particles will fall into the inner sewage hopper 63a and the outer sewage hopper 12a for storage. Since the inner sewage hopper 63a and the outer sewage hopper 12a are both arranged below the filter area 60a, the temporarily stored dirt will not affect the filtration of the flue gas, so that the oxidation filter assembly 1A can complete the cleaning of the filter screen 62a during the operation of flue gas oxidation filtration. The dirt temporarily stored in the inner sewage hopper 63a and the outer sewage hopper 12a can be collected and cleaned by removing the outer end cover 121a and the inner end cover 631a when the oxidation filter assembly 1A is shut down.

[0067] Based on the aforementioned oxidation filter assembly 1A, this embodiment also provides a dust removal and denitrification decomposition device, such as Fig. 9 As shown, it includes the aforementioned oxidation filtration component 1A, denitrification component 2B, and oil removal component 3C, wherein:

[0068] The denitrification component 2B includes a denitrification box 1b filled with an alkaline solution, which is connected to the filtered gas outlet pipe 64a and is connected to the oil removal component 3C through the denitrification outlet pipe 2b.

[0069] The oil removal assembly 3C includes an oil removal tank 1c filled with caustic soda solution, the oil removal tank 1c is connected to the denitrification outlet pipe 2b, and an exhaust pipe 2c is provided on the oil removal tank 1c.

[0070] By using the aforementioned dust removal and denitrification device, this embodiment can realize the following flue gas treatment process:

[0071] Ozone is introduced from the ozone tube 5a and flue gas is introduced from the exhaust pipe 4a. The flue gas and the odor contact and react in the oxidation chamber 10a. The ozone oxidizes the nitrogen oxides in the flue gas into nitrogen dioxide.

[0072] The smoke after oxidation treatment enters the filter chamber 11a from the channel 3a at the top of the baffle 2a. Since the sewage discharge area 61a is isolated from the filter chamber 11a, and the top of the filter cartridge 6a is sealed and connected to the top of the box 1a, the smoke will pass through the filter screen 62a arranged in the filter area 60a and enter the interior of the filter cartridge 6a, so that the large particles in the smoke are filtered by the filter screen 62a, and the filtered smoke is discharged from the oxidation filter assembly 1A through the filter outlet pipe 64a.

[0073] When a large amount of large particles accumulate on the filter 62a, the outer scraping member 7a and the inner scraping member 8a move back and forth in the filter area 60a and scrape the surface of the filter 62a. The large particles attached to the outer end side and the inner end side of the filter 62a will be scraped off by the outer scraping member 7a and the inner scraping member 8a and fall into the inner sewage hopper 63a and the outer sewage hopper 12a, so that the filter 62a is kept clean.

[0074] The filtered flue gas enters the denitrification box 1b through the filter gas outlet pipe 64a, and the flue gas contacts with the alkaline solution (such as urea) inside the denitrification box 1b, so that the alkaline solution fully absorbs the nitrogen dioxide in the flue gas, thereby achieving the purpose of denitrification.

[0075] The flue gas after denitration enters the de-oiling tank 1c through the denitration outlet pipe 2b, and the flue gas contacts the caustic soda solution inside the de-oiling tank 1c, so that the caustic soda solution fully absorbs the impurities in the flue gas, so that the flue gas finally meets the emission requirements. The de-oiled flue gas is discharged through the exhaust pipe 2c.

[0076] In summary, the embodiment of the utility model provides an oxidation filter component 1A and a dust removal and denitrification decomposition device using the oxidation filter component 1A. The oxidation filter component 1A can complete the cleaning of the filter screen 62a during the oxidation filtration of the flue gas through the outer scraping component 7a and the inner scraping component 8a that move back and forth in the filtration area 60a. There is no need to stop the treatment of the flue gas to clean the filter screen 62a, which can effectively improve the efficiency of the flue gas treatment. Moreover, the outer scraping component 7a and the inner scraping component 8a of the oxidation filter component 1A respectively clean the outer end side and the inner end side of the filter screen 62a, which can ensure the cleanliness of both sides of the filter screen 62a and avoid the filter holes on the filter screen 62a being blocked by large particles of the flue gas, which affects the filtering effect of the flue gas. In addition, the oxidation filter component 1A uses the oxidation chamber 10a and the filter chamber 11a that are interconnected, so that the oxidation treatment and large particle impurity treatment in the flue gas treatment step can be carried out in the same box 1a, and there is no need to set up an additional box 1a for the oxidation step. The dust removal and denitrification device is based on the application of the oxidation filter assembly 1A, which can simplify the device structure of the dust removal and denitrification device and avoid the problem that the flue gas treatment cannot be carried out due to the cleaning requirement of the filter 62a.

[0077] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An oxidation filter assembly, characterized in that: The invention comprises a housing (1a), wherein an oxidation chamber (10a) and a filtering chamber (11a) which are connected to each other are arranged in the housing (1a), wherein: The oxidation chamber (10a) is provided with a waste gas pipe (4a) for introducing the flue gas to be treated, and an ozone pipe (5a) for introducing ozone; A filter cartridge (6a) is arranged in the filter chamber (11a), the filter cartridge (6a) comprises a filter area (60a) connected to the filter chamber (11a), and a sewage discharge area (61a) isolated from the filter chamber (11a), a filter screen (62a) for filtering smoke is arranged in the filter area (60a), and a filtered gas outlet pipe (64a) connecting the interior of the filter cartridge (6a) and the exterior of the housing (1a) is arranged in the sewage discharge area (61a); The filter screen (62a) is connected to an outer scraping component (7a) arranged on the outer end side of the filter screen (62a), and an inner scraping component (8a) arranged on the inner end side of the filter screen (62a); the outer scraping component (7a) and the inner scraping component (8a) surround the circumference of the filter cylinder (6a), and the outer scraping component (7a) and the inner scraping component (8a) reciprocate along the axial direction of the filter cylinder (6a) in the filter area (60a), and scrape the outer surface and the inner surface of the filter screen (62a) respectively.

2. The oxidation filtration assembly according to claim 1, characterized in that: A baffle (2a) for guiding the flow path of smoke is arranged between the oxidation chamber (10a) and the filtering chamber (11a), and a passage (3a) for smoke to pass is formed between the baffle (2a) and the top of the box (1a).

3. The oxidation filtration assembly according to claim 1, characterized in that: The outlet of the exhaust pipe (4a) is adjacent to the outlet of the ozone pipe (5a), and the outlet of the exhaust pipe (4a) is located below the outlet of the ozone pipe (5a).

4. The oxidation filtration assembly according to claim 1, characterized in that: The sewage discharge area (61a) is located below the filtering area (60a), and an internal sewage discharge hopper (63a) is arranged in the sewage discharge area (61a); one end of the internal sewage discharge hopper (63a) is connected to the filtering area (60a), and the other end is provided with an internal sewage discharge port (630a), and along the direction from the filtering area (60a) to the sewage discharge area (61a), the inner wall of the internal sewage discharge hopper (63a) gradually converges to the internal sewage discharge port (630a); the filtered air outlet pipe (64a) is connected to the internal sewage discharge hopper (63a).

5. The oxidation filtration assembly according to claim 1, characterized in that: The housing (1a) is provided with an external sewage hopper (12a), which is arranged around the filter cartridge (6a), and one end of the external sewage hopper (12a) is connected to the filter chamber (11a), and the other end is provided with an external sewage outlet (120a); along the direction from the filter area (60a) to the sewage discharge area (61a), the inner wall of the external sewage hopper (12a) gradually converges to the external sewage outlet (120a).

6. The oxidation filtration assembly according to claim 1, characterized in that: The external scraping member (7a) comprises a plurality of external scraping parts (70a), which are arranged at intervals along the axial direction of the filter cartridge (6a) on the outer end side of the filter screen (62a), an external passage area (71a) for smoke to pass through is formed between two adjacent external scraping parts (70a), and an external connecting part (72a) located in the external passage area (71a) is connected between two adjacent external scraping parts (70a), so that the two adjacent external scraping parts (70a) move synchronously.

7. The oxidation filtration assembly according to claim 1, characterized in that: The internal scraping member (8a) comprises a plurality of internal scraping parts (80a), which are arranged at intervals along the axial direction of the filter cartridge (6a) on the inner end side of the filter screen (62a), an inner passage area (81a) for smoke to pass through is formed between two adjacent internal scraping parts (80a), and an inner connecting part (82a) located in the inner passage area (81a) is connected between two adjacent internal scraping parts (80a), so that the two adjacent internal scraping parts (80a) move synchronously.

8. The oxidation filtration assembly according to claim 1, characterized in that: The housing (1a) is provided with a transmission member (9a) for driving the outer scraping member (7a) and the inner scraping member (8a) to move synchronously, the transmission member (9a) comprising a transmission shaft (91a) rotatable relative to the housing (1a), and an inner clamping member (92a) and an outer clamping member (93a) capable of reciprocating along the axial direction of the filter cartridge (6a), wherein: The transmission shaft (91a) penetrates the filter cartridge (6a) in the radial direction of the filter cartridge (6a), and the transmission shaft (91a) is respectively formed with a crankshaft portion (910a) on the inner end side of the filter cartridge (6a) and the outer end side of the filter cartridge (6a); The inner clamping member (92a) is arranged inside the filter cartridge (6a) and is clamped and connected to the crankshaft portion (910a) located at the inner end side of the filter cartridge (6a), and the inner clamping member (92a) is connected to the inner scraping member (8a); The outer clamping member (93a) is arranged outside the filter cartridge (6a) and is clamped and connected to the crankshaft portion (910a) located at the outer end side of the filter cartridge (6a), and the outer clamping member (93a) is connected to the outer scraping member (7a).

9. The oxidation filtration assembly according to claim 8, characterized in that: The outer clamping member (93a) and the inner clamping member (92a) are both provided with an escape space (73a) for escaping from the transmission shaft (91a).

10. A dust removal and denitrification decomposition device, characterized in that: It comprises the oxidation filtration component according to any one of claims 1 to 9, as well as a denitrification component and an oil removal component, wherein: The denitrification component comprises a denitrification box (1b) filled with an alkaline solution, the denitrification box (1b) is connected to the filtered gas outlet pipe (64a), and is connected to the deoiling component via a denitrification outlet pipe (2b); The oil removal component comprises an oil removal tank (1c) filled with caustic soda solution, the oil removal tank (1c) is connected to the denitrification outlet pipe (2b), and an exhaust pipe (2c) is arranged on the oil removal tank (1c).

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