High-dust sulfur-resistant medium-temperature nitrate dust integrated device
The integrated high-dust, sulfur-resistant, medium-temperature denitrification device solves the problems of low-temperature denitrification catalysts being intolerant to sulfur and clogging due to high dust, achieving efficient flue gas purification and flexible desulfurization treatment, and reducing operation and maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU ZHUOYUESIFANG ENVIRONMENTAL TECH
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-19
AI Technical Summary
In existing denitrification and dust removal devices, low-temperature denitrification catalysts are not resistant to sulfur and SO2 must be removed before denitrification can be carried out. Furthermore, traditional catalysts are prone to wear and blockage under high dust conditions, resulting in high equipment maintenance costs and limited desulfurization efficiency.
The design incorporates a high-dust, sulfur-resistant, medium-temperature denitrification and dust removal device. It utilizes a high-dust, sulfur-resistant, medium-temperature catalyst and metal membrane filter bags, combined with an anti-winding mechanism and pulse jet cleaner, to achieve stable denitrification and dust removal of flue gas in high-dust and high-sulfur environments. This allows for direct treatment of the flue gas, with subsequent selective desulfurization processes.
Maintaining catalyst stability and activity in high-dust and high-sulfur flue gas avoids clogging and wear, reduces operation and maintenance costs, provides flexible desulfurization options, and achieves efficient flue gas purification.
Smart Images
Figure CN224252537U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of denitrification and dust removal technology for sulfur-containing flue gas with dust, specifically involving an integrated device for high-dust, sulfur-resistant, medium-temperature denitrification and dust removal. Background Technology
[0002] In the industrial silicon and ferroalloy smelting industry, the production process generates a large amount of dust-laden sulfur-containing flue gas, which not only contains high concentrations of particulate matter and sulfur dioxide (SO2), but also nitrogen oxides (NOx) and other pollutants. If these pollutants are discharged directly without effective treatment, they will not only cause serious pollution to the atmospheric environment and cause environmental problems such as acid rain and smog, but also pose a great threat to the surrounding ecosystem and human health. At present, denitrification and dust removal devices are needed for the denitrification and dust removal treatment of such flue gas.
[0003] Currently, denitrification and dust removal equipment has the following problems during use: First, the catalyst for low-temperature denitrification (160-240℃) is not resistant to sulfur (current technology is not mature). The SO2 concentration in the flue gas must be reduced to <50mg / m³ before the denitrification process can be carried out. Otherwise, it will cause ammonium bisulfate poisoning of the catalyst and block the equipment. Moreover, due to the temperature window required for denitrification, wet desulfurization cannot be connected after desulfurization. Dry desulfurization is less efficient than wet desulfurization and is not suitable for high sulfur dioxide conditions. The selection of smelting raw materials and desulfurization efficiency are limited, and the operation and maintenance costs are relatively high. Second, the selection of traditional dust-free catalysts cannot solve the problems of wear, dust blockage, and thorough dust removal under high dust conditions. Utility Model Content
[0004] (1) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an integrated high-dust, sulfur-resistant, medium-temperature denitrification device. This aims to solve two main problems in existing technologies: First, low-temperature denitrification (160-240℃) catalysts are not sulfur-resistant (current technology is immature), requiring the SO2 concentration in the flue gas to be reduced to <50mg / m³ before the denitrification process can proceed; otherwise, ammonium bisulfate poisoning of the catalyst will occur, clogging the equipment. Furthermore, due to the required denitrification temperature window, wet desulfurization cannot be integrated after the desulfurization pre-process, and dry desulfurization is less efficient than wet desulfurization, making it unsuitable for high sulfur dioxide conditions. This limits the selection of smelting raw materials and desulfurization efficiency, resulting in higher operation and maintenance costs. Second, traditional dust-free catalyst selection cannot solve problems such as wear, dust clogging, and thorough dust removal under high-dust conditions.
[0006] (2) Technical solution
[0007] To solve the above-mentioned technical problems, this utility model provides a high-dust, sulfur-resistant, medium-temperature integrated dust collection device, including a primary flue gas chamber. Lower frames are fixed to both sides of the bottom of the primary flue gas chamber, and ash hoppers are installed below the two lower frames. Middle chambers are installed on both sides of the primary flue gas chamber, and a clean flue gas chamber is connected to the top of the two middle chambers. A de-pinning dust removal mechanism is jointly installed inside the two middle chambers, the clean flue gas chamber, and the primary flue gas chamber. An anti-winding mechanism is jointly installed inside and on one side of the two lower frames. The de-pinning dust removal mechanism includes a de-pinning component, which is installed inside the primary flue gas chamber. Metal membrane filter bags are installed in the middle sections of the two middle chambers. Pulse jet cleaners are installed on both sides of the top of the clean flue gas chamber.
[0008] Furthermore, the denitrification assembly includes dust channels, which are located on both sides of a section of the original flue gas chamber. Dust distributors are installed at the bottom of the two dust channels, and high-dust, sulfur-resistant, medium-temperature catalysts are installed in the middle of the two dust channels. A combined soot blower is installed in the middle of a section of the original flue gas chamber.
[0009] Furthermore, the dust channels are symmetrically distributed along the vertical central axis of the original flue gas chamber, and the two dust channels are connected to the upper dust input area of the original flue gas chamber by a dust distributor.
[0010] Furthermore, the output end of the pulse jet nozzle is opposite to the slot opened on the inner housing.
[0011] Furthermore, the anti-winding mechanism includes a linkage opening and closing assembly, which is installed inside the two lower frames and on one side of the outside. The two lower frames have fixed blocks on both sides inside, and the fixed blocks have a movable groove in the middle. The linkage opening and closing assembly includes two pairs of movable rods, and each pair of movable rods has a dustproof plate fixed inside. The two lower frames have a limiting edge fixed on the upper side of the middle sides.
[0012] Furthermore, the linkage opening and closing assembly includes a fixed block, which is disposed on one side of the two lower frames. A drive motor is installed at one end of the leftmost fixed block, and the output end of the drive motor is connected to a main rotating rod. A drive gear is fixed around the two sections of the main rotating rod, and driven gears are meshed on the sides of the two drive gears. A driven rod is fixed in the middle of the two driven gears. A first bevel gear is fixed around one side of each of the two driven rods and the drive gears, and second bevel gears are meshed on the sides of multiple first bevel gears. A movable rod is fixed in the middle of multiple second bevel gears.
[0013] Furthermore, a rotatable connection is formed between the movable rod and the movable groove in the middle of the fixed block, at which time the dustproof plate connected to the movable rod can form an angle-adjustable connection.
[0014] (3) Beneficial effects
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] In the industrial silicon and ferroalloy smelting industry, this invention addresses the issue of large quantities of dust-laden, sulfur-containing flue gas generated during production entering through the upper inlet of the original flue gas chamber. The gas is then evenly guided into two corresponding flue gas channels by two dust distributors. Within these channels, the dust-laden gas undergoes a chemical reaction with injected ammonia-based reducing agents under medium-temperature conditions using high-dust, sulfur-resistant, medium-temperature catalysts. This reaction converts the gas into harmless nitrogen and water, achieving denitrification and purification. The "high dust" characteristic allows the catalyst to operate stably in flue gas with high dust content, preventing clogging, wear, or poisoning by dust, thus ensuring its long-term effectiveness in high-dust environments. Furthermore, the "sulfur resistance" characteristic... Its characteristics enable it to tolerate sulfides in flue gas, avoiding a decrease in catalytic activity due to sulfur poisoning. It maintains good denitrification performance in high-sulfur flue gas environments and is suitable for treating flue gas with high sulfur content. The denitrified dust then enters two intermediate chambers through a channel and is filtered by metal membrane filter bags until the gas can enter the clean flue gas chamber through the opening at the top of the intermediate chamber for mixing and subsequent desulfurization. It is worth mentioning that the desulfurization process can be comprehensively considered based on various factors such as the customer's project location, desulfurizing agent, water source, environmental impact assessment, raw materials, operation and maintenance, and investment. Desulfurization is highly selective, offering two options: one is a wet process, using a single tower. Multiple furnaces; secondly, dry method + two-stage desulfurization ash dust removal, one-to-one; high overall selectivity. When subsequent ash cleaning is required, multiple sets of combined soot blowers can be selected using compressed air soot blowers. By introducing compressed air into the shock wave generator, shock waves are generated to remove the ash and dirt from the catalyst surface and carry it away by the flue gas. At the same time, the pulse jet cleaner is also turned on. Its jet pipe will use low-pressure pulse back-blowing of the metal membrane filter bag. Thus, the ash and dirt can fall into the two ash hoppers. Since most components in this device are relatively set in two sets, such as ash hopper, middle box, flue dust channel and flue dust distributor, etc., personnel can divide the dust removal filter chambers into compartments to achieve the purpose of offline ash cleaning and online maintenance by compartment during operation.
[0017] In this invention, during normal flue gas conveying operations within the device, a pair of dust-blocking plates within the lower frame above the two ash hoppers will be closed, forming a "horizontal sealing barrier." This prevents flue gas from entering the ash hoppers as it passes through, thus cutting off the airflow entrainment force and preventing the dust already collected in the ash hoppers from being stirred up by airflow disturbances and re-entering the filter bags and catalyst zone, causing filter bag blockage and increased catalyst wear. Before the dust removal operation, personnel can start the drive motor to rotate the main rotating rod and its two fixed drive gears. The corresponding driven gears meshing with the two gears will cause their respective fixed driven rods to rotate in opposite directions. At this time, the first bevel gears set at the two ends of one main rod and one end of each of the two driven rods will move in opposite directions. In this state, the second bevel gears meshing with the first bevel gears in different directions will cause their respective fixed movable rods and corresponding dust blocking plates to move relative to each other along the movable groove opened in the middle of the fixed block. As a result, the two ash hoppers can be fully exposed, forming a vertical ash falling channel. The ash cleaned by the device can pass through this channel to achieve the purpose of collection. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0020] Figure 2 This is a schematic diagram of the internal structure;
[0021] Figure 3 This is a schematic diagram of the linkage opening and closing component structure;
[0022] Figure 4 for Figure 2 Schematic diagram of the structure at point A in the middle.
[0023] The labels in the attached diagram are as follows: 1. Original flue gas chamber; 2. Lower frame; 3. Ash hopper; 4. Middle chamber; 5. Clean flue gas chamber; 6. Denitrification and dust removal mechanism; 61. Denitrification assembly; 611. Flue gas passage; 612. Flue gas distributor; 613. High dust and sulfur-resistant medium-temperature catalyst; 614. Combined soot blower; 62. Metal membrane filter bag; 63. Pulse jet cleaner; 7. Anti-winding mechanism; 71. Linkage opening and closing assembly; 711. Fixed block; 712. Drive motor; 713. Main rotating rod; 714. Driving gear; 715. Driven gear; 716. Driven rotating rod; 717. First bevel gear; 718. Second bevel gear; 719. Movable rod; 72. Fixed block; 73. Movable groove; 74. Dust-blocking plate; 75. Limiting edge. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] This specific embodiment is a high-dust, sulfur-resistant, medium-temperature dust-reducing integrated device, the structural diagram of which is shown below. Figures 1 to 4As shown, the system includes a primary flue gas chamber 1, with lower mounting frames 2 fixed to both sides of the bottom of the primary flue gas chamber 1. Ash hoppers 3 are installed below the two lower mounting frames 2. Middle chambers 4 are installed on both sides of the primary flue gas chamber 1, and clean flue gas chambers 5 are connected above the two middle chambers 4. A de-pinning dust removal mechanism 6 is jointly installed inside the two middle chambers 4, the clean flue gas chamber 5, and the primary flue gas chamber 1. An anti-winding mechanism 7 is jointly installed inside and on one side of the two lower mounting frames 2. The dust removal mechanism 6 includes a de-pinning assembly 61, which is installed inside the original flue gas chamber 1. The de-pinning assembly 61 includes dust channels 611, which are located on both sides of a section of the original flue gas chamber 1. Dust distributors 612 are installed at the bottom of the two dust channels 611, and a high-dust, sulfur-resistant, medium-temperature catalyst 613 is installed in the middle of the two dust channels 611. A combined soot blower 614 is installed in the middle of a section of the original flue gas chamber 1. Channels 611 are symmetrically distributed along the vertical central axis of the original flue gas chamber 1. The two dust channels 611 are connected to the upper dust input area of the original flue gas chamber 1 via dust distributors 612. Metal membrane filter bags 62 are installed in the middle sections of the two intermediate chambers 4. Pulse jet cleaners 63 are installed on both sides of the upper part of the clean flue gas chamber 5. The output end of the jet pipe of the pulse jet cleaner 63 is opposite to the slot opened on the intermediate chamber 4. In the industrial silicon and ferroalloy smelting industry, a large amount of dust-laden sulfur-containing flue gas generated during the production process enters from the upper input port of the original flue gas chamber 1. It is then evenly guided into the two corresponding dust channels 611 by the two dust distributors 612. Subsequently, the dust-laden flue gas reacts chemically with the injected ammonia reducing agent under medium-temperature conditions in the high-dust, sulfur-resistant, medium-temperature catalysts 613 installed inside the two dust channels 611, converting it into harmless nitrogen and water, thereby achieving denitrification and purification. The term "high dust" refers to the high-dust, sulfur-resistant, medium-temperature catalysts. The catalyst's characteristics enable it to operate stably in flue gas with high dust content, preventing clogging, wear, or poisoning by dust and ensuring its long-term effectiveness in high-dust environments. Its "sulfur resistance" allows it to tolerate sulfides in the flue gas, avoiding sulfur poisoning that could reduce catalytic activity. It maintains good denitrification performance in high-sulfur flue gas environments and is suitable for treating flue gas with high sulfur content. The denitrified dust then enters two intermediate chambers 4 through a channel and is filtered by metal membrane filter bags 62 until the gas can enter the clean flue gas chamber 5 through the opening at the top of the intermediate chamber 4 for mixing and subsequent desulfurization. It is worth noting that the desulfurization process can be comprehensively considered based on factors such as the customer's project location, desulfurizing agent, water source, environmental impact assessment, raw materials, operation and maintenance, and investment. Desulfurization is highly selective, offering two options: first, a wet method with multiple furnaces in one tower; second, a dry method with secondary desulfurization ash dust removal, one-to-one.The device offers high overall flexibility. When subsequent dust removal is required, the multiple sets of combined soot blowers 614 can utilize compressed air soot blowers. By introducing compressed air into the shock wave generator, shock waves are generated, causing the ash and scale on the catalyst surface to fall off and be carried away by the flue gas. Simultaneously, the pulse jet cleaner 63 is activated, and its jet pipe uses low-pressure pulse backflushing of the metal membrane filter bag 62. Thus, the ash and scale can fall into the two ash hoppers 3. Since most components in this device are arranged in two sets, such as the ash hopper 3, the middle chamber 4, the dust passage 611, and the dust distributor 612, personnel can divide the dust collection filter into compartments, achieving offline dust removal and online maintenance by compartment during operation.
[0026] The anti-winding mechanism 7 includes a linkage opening and closing assembly 71, which is installed inside the two lower frames 2 and on one side of the exterior. Fixed blocks 72 are fixed on both sides of the interior of the two lower frames 2, and a movable groove 73 is provided in the middle of each fixed block 72. The linkage opening and closing assembly 71 includes a fixing block 711, which is located on one side of the two lower frames 2. A drive motor 712 is installed at one end of the leftmost fixing block 711, and the output end of the drive motor 712 is connected to a main rotating rod 713. Drive gears 714 are fixed around the two sections of the main rotating rod 713, and driven teeth mesh on the sides of the two drive gears 714. The wheel 715 has two driven gears 715 with driven rods 716 fixed in the middle. First bevel gears 717 are fixed around one side of each of the two driven rods 716 and the driving gear 714. Multiple first bevel gears 717 have second bevel gears 718 meshing with their sides. Movable rods 719 are fixed in the middle of the multiple second bevel gears 718. Dust-blocking plates 74 are fixed to the inner sides of each pair of movable rods 719. Limiting edges 75 are fixed slightly above the middle sides of the two lower mounting frames 2. A rotatable connection is formed between the movable rods 719 and the movable grooves 73 in the middle of the fixed block 72. At this time, the dust-blocking plates 719 connected to the movable rods 719... 4. An adjustable connection can be formed. During normal flue gas conveying operations within this device, a pair of dust-blocking plates 74 inside the lower frame 2 above the two ash hoppers 3 will be in a closed state, forming a "horizontal sealing barrier." This prevents flue gas from entering the ash hoppers 3 when it passes through, thereby cutting off the airflow suction power from the path. This prevents the dust already captured in the ash hoppers 3 from being disturbed by the airflow and being re-raised into the filter bags and catalyst area, causing load blockage of the filter bags and increasing catalyst wear. Before the dust removal operation, the operator can start the drive motor 712 to rotate the main rotating rod 713 and its two fixed drive gears 714, thereby engaging the two gears. The corresponding driven gear 715 of the meshing gear will drive its fixed driven rod 716 to rotate in the opposite direction. At this time, the first bevel gear 717 set at the two ends of the main rod 713 and the two driven rods 716 will move in opposite directions. In this state, the second bevel gear 718 meshing with the first bevel gear 717 in different directions will drive its fixed movable rod 719 and corresponding dust blocking plate 74 to move relative to each other along the movable groove 73 opened in the middle of the fixed block 72. As a result, the two ash hoppers 3 can be fully exposed to form a vertical ash falling channel. The ash cleaned by the device can pass through the channel to achieve the purpose of collection.
[0027] Working Principle: In the industrial silicon and ferroalloy smelting industry, a large amount of dust-laden, sulfur-containing flue gas generated during the production process enters from the upper inlet of the original flue gas chamber 1. It is then evenly guided into two corresponding flue gas channels 611 by two dust distributors 612. The dust-laden flue gas then reacts chemically with injected ammonia-based reducing agents under medium-temperature conditions with high-dust, sulfur-resistant, medium-temperature catalysts 613 installed within the two channels 611, converting them into harmless nitrogen and water, thereby achieving denitrification and purification. The "high dust" characteristic allows the catalyst to operate stably in flue gas with high dust content, preventing clogging, wear, or poisoning by dust, ensuring the long-term effectiveness of the catalyst in high-dust environments. The "sulfur resistance" characteristic further enhances its effectiveness. Its characteristics enable it to tolerate sulfides in flue gas, avoiding a decrease in catalytic activity due to sulfur poisoning. It can maintain good denitrification performance in high-sulfur flue gas environments and is suitable for treating flue gas with high sulfur content. After denitrification, the flue dust enters the two middle chambers 4 through the channel and is filtered and dusted by the metal membrane filter bags 62 installed therein until the gas can enter the clean flue gas chamber 5 through the opening at the top of the middle chamber 4 for mixing and subsequent desulfurization treatment. It is worth mentioning that the desulfurization process can be comprehensively considered based on various factors such as the location of the customer's project, desulfurizing agent, water source, environmental impact assessment, raw materials, operation and maintenance, and investment. The desulfurization is highly selective and has the following two options: First, wet method, one tower with multiple furnaces; Second, dry method + secondary desulfurization ash dust removal, one-to-one.The device offers high overall flexibility. When subsequent cleaning is required, the multi-unit combined sootblower 614 can utilize compressed air sootblowers. By introducing compressed air into the shock wave generator, shock waves are generated, causing the ash and dirt on the catalyst surface to fall off and be carried away by the flue gas. Simultaneously, the pulse jet cleaner 63 is activated, and its jet pipe uses low-pressure pulse backflushing of the metal membrane filter bag 62. Thus, the ash and dirt can fall into the two ash hoppers 3. Since most components in this device are arranged in two sets, such as the ash hopper 3, the middle chamber 4, the dust passage 611, and the dust distributor 612, personnel can divide the dust collection filter into compartments, achieving offline cleaning and online maintenance by compartment during operation. Furthermore, during normal flue gas transport within the device, a pair of dust-blocking plates 74 in the lower frame 2 above the two ash hoppers 3 will be closed, forming a "horizontal sealing barrier." This prevents flue gas from entering the ash hoppers 3, thereby cutting off the airflow entrainment force and preventing the ash hoppers 3 from becoming contaminated. The collected dust, disturbed by airflow, is re-entrained and enters the filter bags and catalyst zone, causing filter bag blockage and increased catalyst wear. Before the dust removal operation, the operator can start the drive motor 712 to rotate the main rotating rod 713 and its two fixed drive gears 714. This causes the corresponding driven gears 715, meshing with these gears, to rotate their respective fixed driven rods 716 in the opposite direction. At this moment, the first bevel gears 717 at one end of each of the two sections of the main rotating rod 713 and the two driven rods 716 move in opposite directions. In this state, the second bevel gears 718, meshing with the first bevel gears 717 in different directions, move relative to each other along the movable rods 719 and corresponding dust-blocking plates 74 through the movable grooves 73 in the middle of the fixed block 72. This exposes the two ash hoppers 3, forming a vertical ash collection channel. The ash removed by the device can then pass through this channel for collection.
[0028] All technical features in this embodiment can be freely combined according to actual needs.
[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A high-dust, sulfur-resistant, medium-temperature dust-reducing integrated device, comprising a raw flue gas chamber (1), characterized in that, The bottom sides of the original flue gas box (1) are fixed with lower racks (2), and ash hoppers (3) are installed below the two lower racks (2). The sides of the original flue gas box (1) are equipped with middle boxes (4), and the top of the two middle boxes (4) is connected to the clean flue gas box (5). The two middle boxes (4), the clean flue gas box (5) and the original flue gas box (1) are jointly equipped with a de-pinning dust removal mechanism (6). The inside and outside of the two lower racks (2) are jointly equipped with an anti-winding mechanism (7). The de-pinning dust removal mechanism (6) includes a de-pinning component (61), and the de-pinning component (61) is installed inside the original flue gas box (1). The middle section of the two middle boxes (4) is equipped with a metal membrane filter bag (62). The top sides of the clean flue gas box (5) are equipped with pulse jets (63).
2. The high-dust, sulfur-resistant, medium-temperature dust-reducing integrated device according to claim 1, characterized in that, The denitrification assembly (61) includes a dust channel (611), which is located on both sides of a section of the original flue gas box (1). The bottom of the two dust channels (611) is equipped with a dust distributor (612), and the middle part of the two dust channels (611) is equipped with a high dust and sulfur resistant medium temperature catalyst (613). The middle part of a section of the original flue gas box (1) is equipped with a combined soot blower (614).
3. The high-dust, sulfur-resistant, medium-temperature dust-reducing integrated device according to claim 2, characterized in that, The dust channels (611) are symmetrically distributed along the vertical central axis of the original flue gas box (1), and the two dust channels (611) are connected to the upper dust input area of the original flue gas box (1) by dust distributor (612).
4. The integrated high-dust, sulfur-resistant, medium-temperature dust-reducing device according to claim 1, characterized in that, The output end of the pulse jet (63) is opposite to the slot opened on the middle box (4).
5. The integrated high-dust, sulfur-resistant, medium-temperature dust-reducing device according to claim 1, characterized in that, The anti-winding mechanism (7) includes a linkage opening and closing assembly (71), which is installed inside the two lower frames (2) and on one side outside. The two lower frames (2) are fixedly provided with fixed blocks (72) on both sides inside, and the fixed blocks (72) are provided with a movable groove (73) in the middle. The linkage opening and closing assembly (71) includes two pairs of movable rods (719), and the inner side of each pair of movable rods (719) is fixedly provided with a dustproof plate (74). The upper side of the two lower frames (2) is fixedly provided with a limiting edge (75).
6. The integrated high-dust, sulfur-resistant, medium-temperature dust nitrification device according to claim 5, characterized in that, The linkage opening and closing assembly (71) includes a fixed block (711), and the fixed block (711) is disposed on one side of the two lower brackets (2). A drive motor (712) is installed at one end of the leftmost fixed block (711), and the output end of the drive motor (712) is connected to a main rotating rod (713). The two sections of the main rotating rod (713) are fixed with drive gears (714), and the two drive gears (714) are meshed with driven gears (715) on their sides. The two driven gears (715) are fixed with a driven rod (716) in the middle. The two driven rods (716) and the drive gears (714) are each fixed with a first bevel gear (717) on one side, and the sides of the multiple first bevel gears (717) are meshed with second bevel gears (718). The middle of the multiple second bevel gears (718) is fixed with a movable rod (719).
7. The integrated high-dust, sulfur-resistant, medium-temperature dust nitrification device according to claim 6, characterized in that, The movable rod (719) and the movable groove (73) in the middle of the fixed block (72) form a rotatable connection. At this time, the dustproof plate (74) connected to the movable rod (719) can form an angle-adjustable connection.