Device for dry desulfurization coupled with efficient dust removal and denitration of biomass boiler flue gas
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU BAOJING ENVIRONMENTAL TECH CO LTD
- Filing Date
- 2025-09-23
- Publication Date
- 2026-06-26
Smart Images
Figure CN121338435B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of flue gas treatment technology, specifically to a device for dry desulfurization coupled with high-efficiency dust removal and denitrification of flue gas from biomass boilers. Background Technology
[0002] Biomass boiler flue gas refers to the exhaust gas produced after the combustion of agricultural and forestry waste such as wood chips, straw, rice husks, and bark. Since biomass fuel itself contains a certain amount of sulfur and nitrogen in the air undergoes an oxidation reaction under high temperature conditions during combustion, while nitrogen-containing organic matter in biomass decomposes during combustion, the flue gas contains sulfur oxides such as sulfur dioxide and sulfur trioxide, and nitrogen oxides such as nitric oxide and nitrogen dioxide.
[0003] Chinese patent document (publication number: CN114931850B) discloses an integrated dry desulfurization, denitrification, and dust removal system, including an inlet flue and a main structure. The inlet flue is equipped with a desulfurizing agent spraying device. The main structure includes a desulfurization zone and a dust removal and denitrification zone. The desulfurization zone is equipped with a turbulence device and a denitrification agent spraying device. The dust removal and denitrification zone is equipped with a dust removal pipe and a catalytic pipe. The dust removal pipe and the catalytic pipe are detachably connected. The dust removal pipe is made of ceramic fiber material. The catalytic pipe includes a flange, a cylindrical tube body, and a central partition. The cylindrical tube body is provided with a first vent, and the central partition is provided with several second vents. This invention can complete desulfurization, denitrification, and dust removal on a single device, and has the advantages of compact structure, small footprint, and low cost.
[0004] Existing biomass boiler flue gas dust removal devices face multiple technical challenges during operation:
[0005] Dust collector bags are prone to denting and collapsing under flue gas pressure, affecting filtration efficiency; dust continuously adheres and accumulates on the outside of the dust collector bags, leading to a decrease in dust removal efficiency and requiring frequent shutdowns for cleaning; transmission components such as bidirectional threaded screws are easily contaminated by dust in dusty environments, resulting in decreased transmission accuracy and shortened service life, making it difficult to achieve effective dynamic sealing protection. Summary of the Invention
[0006] To address the shortcomings of existing technologies, this invention provides a device for dry desulfurization coupled with high-efficiency dust removal and denitrification of flue gas from biomass boilers. By setting a first and second shaking ring, the dust collector bags are radially supported to prevent denting and collapse. The flue gas to be treated drives the impeller to rotate, which in turn drives a bidirectional threaded screw to achieve automatic dust removal without additional power configuration or shutdown. An impact unit converts the reciprocating linear movement of the screw nut block into a periodic, rapid left-right switching motion. A guide plate pushes the fork body to switch rapidly, generating a powerful impact. A return spring stores and releases energy, converting the small driving force into strong shaking energy. The impact rod strikes the impact block, driving the shaking unit to generate strong vibrations that clean the dust adhering to the outside of the dust collector bags. A dustproof unit is installed on the dust cover of the bidirectional threaded screw. An isosceles trapezoidal column and an arc plate, under the action of the return spring, achieve a dynamic sealing protection that is fully enclosed when stationary and intelligently opens and automatically closes after movement. This effectively isolates the dusty environment from contaminating the precision transmission components, ensuring continuous and stable operation and high-efficiency dust removal under operating conditions.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A device for dry desulfurization coupled with high-efficiency dust removal and denitrification of flue gas from biomass boilers includes an SDS desulfurization reactor, a feeder, a dust collector, an SCR denitrification reactor, and an ammonia tank connected by pipelines. Dust collector bags are vertically installed inside the dust collector. Shelves are sealed and fixed at intervals between the dust collector and the top plate inside the dust collector. The top plate of the dust collector has a flue gas discharge port, and the shelves have openings. The dust collector bags pass through the openings in the shelves, and the top rings of the dust collector bags are sealed to the openings in the shelves. The bottom ends of the dust collector bags are sealed to a bottom plate. Below the bottom plate are a fixedly connected base and a cover. The bottom plate is fixedly installed on the top of the base, and the base is fixedly connected to the inner wall of the dust collector via a support frame. An impeller is rotatably installed inside the cover. Flue gas inlet and outlet pipes are installed on both sides of the cover with staggered axes. The other end of the flue gas inlet pipe is connected to the upstream flue gas outlet, and the other end of the flue gas outlet pipe is connected to the inner cavity of the dust collector. A transmission component is installed on the impeller, and the transmission component extends into the dust collector bag in a sealed manner. A shaking component is installed on the side of the power component. When the flue gas to be dusted enters the hood and drives the impeller, the transmission component drives the shaking component to shake off the dust adhering to the dust collector bag.
[0009] Preferably, the transmission assembly includes a bidirectional threaded screw and a guide rod. A support rod is fixedly mounted radially at the top of the shelf. One end of the bidirectional threaded screw is fixedly mounted on the impeller and rotatably connected to the base through a sealed bearing. The other end of the bidirectional threaded screw extends to the top of the dust collector bag and is rotatably mounted in the support rod through a bearing. A matching screw nut block is provided on the bidirectional threaded screw. The guide rod slides through the screw nut block and its two ends are fixedly connected to the support rod and the base plate, respectively.
[0010] Preferably, the shaking assembly includes an impact unit and a shaking unit. The shaking unit includes a fixed ring, a first shaking ring, and a second shaking ring arranged sequentially from the inside to the outside. The three rings are elastically connected by several resonant springs arranged in an array. Two sets of uprights are symmetrically arranged on both sides of the bidirectional threaded screw. Each set of uprights includes a first upright and a second upright arranged sequentially from the inside to the outside. The two ends of the uprights are fixedly connected to a support rod and a base plate, respectively. The fixed ring is fixedly connected to the first upright, and the second shaking ring is fixed to the inner wall of the dust collector bag by stitching. The impact unit is installed between the first upright and the second upright, and the impact unit is connected to the screw nut block by a guide plate. Several impact blocks are integrally formed on the first upright. When the shaking unit is driven to impact the impact blocks and generate shaking, it drives the second upright to shake off the dust adhering to the dust collector bag.
[0011] Preferably, the impact unit includes a shift fork, a shift lever, and a jump lever. A rotating shaft is fixedly threaded through the shift lever, and the rotating shaft is rotatably mounted between the first and second uprights via a bearing. The jump lever is rotatably mounted between the first and second uprights via a pin. The end of the shift lever away from the rotating shaft has a fork body, and the end of the jump lever away from the pin has a groove. The groove is spaced from the adjacent end of the jump lever. A guide rod is fixedly arranged between the fork bodies, and the guide rod slides through the groove. A retaining ring is fixedly arranged at the end of the jump lever near the pin, and a pressure ring is slidably sleeved on the jump lever. A return spring is arranged between the pressure ring and the retaining ring, and the return spring is sleeved on the outer circumferential surface of the jump lever. The rotating shaft extends towards the direction of the bidirectional threaded screw and has a shift lever fixed at its end. The shift lever is parallel to the shift fork. Two frames are set on the horizontal plane where the static fork is located. The top plates of the frames are set vertically. The two frames are symmetrically fixed on the first and second uprights. Impact rods slide through the top plates and partitions of the frames. Limiting plates and return springs are respectively fitted on the impact rods located between the top plates and partitions of the frames. The limiting plates are fixedly connected to the impact rods, and the return springs are located between the limiting plates and the top plates of the frames. An end plate is fixed to one end of the impact rod near the fork, and the end plate bears the impact of the fork. An impact head is set at the other end of the impact rod. The impact head is used to impact the impact block. After impacting, the impact head automatically resets under the action of the return spring. When the lever is driven to rotate, it drives the fork to swing and switch the left and right positions through the rotating shaft. The fork forms a violent impact under the action of the return spring.
[0012] Preferably, a guide plate is fixedly connected to one side of the lead screw nut block, and an inclined guide rod and a guide wheel are fixedly installed on the other side of the guide plate. The inclined guide rod and the guide wheel are located at opposite corners of the guide plate, and the inclined guide rod, the guide wheel, and the lever are in the same vertical plane. The end of the lever away from the pivot extends outward to form an enlarged end. The inclined surface of the inclined guide rod faces the lever, and the top of the inclined guide rod faces the same direction as the enlarged end. The inclined guide rod is wider at the top and narrower at the bottom. When the guide plate moves upward with the lead screw nut block, the guide wheel pushes the adjacent lever to the other side. When the guide plate moves downward, the inclined guide rod pushes the adjacent lever to the initial side.
[0013] Preferably, a dust cover is provided on the outer periphery of the lead screw nut block, and a support rod and a base plate are fixed to the two ends of the dust cover respectively. A collar is slidably fitted on the outer peripheral surface of the dust cover. A through groove is opened on the dust cover along the axis, and the lead screw nut block extends to the outside of the dust cover through the through groove. The lead screw nut block is fixedly connected to the collar, and the collar is fixedly connected to the guide plate. A dustproof unit is provided in the through groove. When the extended part of the lead screw nut block moves through, the dustproof unit opens to avoid it. After it moves through, the dustproof unit automatically closes.
[0014] Preferably, the dustproof unit includes a fixedly connected isosceles trapezoidal column and an arc-shaped guide rod. Avoidance grooves are respectively opened on the inner walls of the dustproof cover's through groove. An arc-shaped guide groove is further deepened along the circumferential direction within the avoidance groove, and the arc-shaped guide rod is slidably installed within the arc-shaped guide groove. The small end faces of two isosceles trapezoidal columns arranged in the same radial direction abut against each other, and an arc-shaped plate is provided at the bottom of each isosceles trapezoidal column. The two arc-shaped plates in the same radial direction abut against each other, filling the dustproof cover's through groove to form a complete outer circumference, effectively preventing dust from entering the bidirectional threaded screw. An extension drive mechanism is provided on the connecting rod. When the screw nut block is driven, the extension drive mechanism pushes the adjacent arc-shaped plate into the avoidance grooves on both sides, forming an avoidance channel.
[0015] Preferably, the extension drive mechanism includes a lifting plate and a side pusher block, which are fixed to the connecting rod from top to bottom and maintain an appropriate vertical spacing. The lifting plate and the side pusher block extend along the dust cover axis to both sides on the connecting rod, with the lifting plate being longer than the side pusher block. A wedge structure is provided on the side of the lifting plate near the arc-shaped plate, and an isosceles triangular prism is fixed on the side of the side pusher block near the isosceles trapezoidal prism. The arc-shaped guide groove is further deepened along the radial center direction to form a lifting clearance groove, providing sufficient clearance space for the arc-shaped guide rod to move along the center direction. When the extension drive mechanism is driven to move along the length of the through groove, the lifting plate first lifts the arc-shaped plate to the clearance groove height, and then the isosceles triangular prism of the side pusher block abuts against the isosceles trapezoidal prisms on both sides, pushing the arc-shaped plate and the isosceles trapezoidal prisms together into the clearance grooves on both sides to form a clearance channel.
[0016] Preferably, a first reset spring is fixed at the bottom of the arc-shaped guide groove, and a sliding plate is fixed at the free end of the first reset spring, with the sliding plate slidingly abutting against the end of the arc-shaped guide rod; a second reset spring is fixed at the top of the lifting clearance groove, and an arc-shaped sliding plate is fixed at the free end of the second reset spring, with the arc-shaped sliding plate slidingly abutting against the top of the arc-shaped guide rod.
[0017] Preferably, the lower part of the SDS desulfurization reactor is connected to an air inlet pipe, the upper part of the SDS desulfurization reactor is connected to the lower part of the inner cavity of the dust collector through a first pipe, the upper part of the outer surface of the dust collector is provided with a second pipe for connecting the exhaust chamber to the upper part of the inner cavity of the SCR denitrification reactor, one side of the outer surface of the SDS desulfurization reactor is connected to a feeder for conveying sodium bicarbonate powder, and the ammonia tank is connected to the upper part of the inner cavity of the second pipe through a third pipe.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] 1. The device of the present invention performs dust removal treatment on the flue gas entering the dust collector, converting the kinetic energy of the flue gas to be treated into the power to start the device. According to the flow rate of the flue gas, the shaking unit can be driven intermittently. The shaking ring of the shaking unit not only supports the dust collector bag to prevent it from collapsing, but also provides continuous shaking to clean the dust adhering to the outside of the dust collector bag, greatly reducing the frequency of shutdown for cleaning. It significantly enhances the dust removal capacity of the device without affecting the working conditions, and can also effectively control the displacement of the components in the initial state of being subjected to impact, avoiding damage to the device structure.
[0020] Specifically, after the flue gas to be treated enters the device through the flue gas inlet pipe, it drives the impeller to rotate, which in turn drives the bidirectional threaded screw to achieve reciprocating linear movement of the screw nut block and the guide plate. The guide plate periodically pushes the impact unit, causing the fork to switch rapidly left and right, generating a violent impact. The fork hits the end plate, and the driving impact rod overcomes the resistance of the return spring and then impacts the impact block, generating strong vibration. Under the elastic transmission of the resonant spring, the first and second vibration rings will exhibit obvious coordinated vibration. Since the second vibration ring and the dust collector bag are connected by a fabric belt through a stitched connection, the second vibration ring not only provides radial support to the dust collector bag to prevent denting and deformation, but also generates strong vibration or vibration action on the dust adsorbed on the dust collector bag, achieving efficient separation and cleaning.
[0021] 2. The impact unit of the device of the present invention transforms the reciprocating linear movement of the lead screw nut block into a periodic left-right rapid switching action, creating the inherent conditions for violent impact to form strong vibration and providing continuous power conversion, realizing intelligent operation of automatically cleaning dust without the need for additional power configuration under working conditions. Moreover, it is designed using the lever principle, and cleverly triggers the elastic release of the return spring with the small force of the lead screw nut block movement, without the need for additional or even large power source, simply making full use of the energy stored in the return spring to completely transform it into strong vibration energy.
[0022] Specifically, as the guide plate moves upward with the lead screw nut block, the guide wheel powerfully pushes the lever or inclined guide rod on its side, smoothly transferring it to the other side. Due to its coaxial fixed setting with the rotating shaft, the shift fork is precisely driven to rotate. During the rotation, the fork body squeezes the pressure ring downward and gradually compresses the return spring to store elastic potential energy, while simultaneously driving the shift fork to rotate. When the fork body, which is integrated with the shift fork, rotates beyond the critical center position of the rotating shaft and the pin, the lever instantly enters a free state. Under the strong elastic action of the return spring, it quickly pushes the pressure ring to rapidly approach the other side of the fork body, thereby causing the shift fork to rotate rapidly around the rotating shaft axis, and the jump rod to rotate synchronously around the pin, instantly completing the rapid switching action of the left and right positions of the fork body. The switching action causes the fork body to violently impact the end plate, powerfully driving the impact rod to overcome the resistance of the return spring and quickly impact the impact block, completing the efficient energy transfer to the vibration unit to form continuous vibration. Under the reset action of the return spring, the impact rod automatically returns to its position, effectively avoiding continuous contact with the impact block and affecting its free vibration effect, ensuring the efficiency of impact transmission and the continuity of vibration.
[0023] 3. The dustproof unit on the dustproof cover of the present invention ensures that the lead screw nut block effectively isolates dust and maintains clean working conditions when it moves along the bidirectional threaded lead screw. The dustproof unit not only ensures that the dustproof cover is in a completely closed state when it is stationary, but also ensures that it is in a temporarily open state when the extension part of the bidirectional threaded lead screw passes through the through groove of the dustproof cover. After passing through, the dustproof unit automatically closes in time, forming a dynamic sealing protection system.
[0024] Specifically, when stationary, the small end faces of the two isosceles trapezoidal prisms abut to form a sealing point. The arc-shaped plate, under the thrust of the second return spring, is flush with the outer wall of the dust cover. The abutment of the two arc-shaped plates fills the through-groove, forming a complete circumference to prevent dust from entering the bidirectional threaded screw. When the screw nut block moves, the extension drive mechanism on the connecting rod is activated, the lifting plate wedge structure lifts the arc-shaped plate, and the arc-shaped guide rod moves radially to compress the second return spring. The isosceles triangular prism on the side push block pushes the two isosceles trapezoidal prisms into the clearance groove to separate them. The arc-shaped plate is then pushed into the clearance groove to provide passage for the connecting rod. The arc-shaped guide rod compresses two return springs to store potential energy; when the connecting rod passes, the dustproof unit remains open to ensure smooth passage; after the connecting rod leaves, the reset mechanism is activated. The first return spring pushes the arc-shaped guide rod back to its original position through the sliding plate, driving the arc-shaped plate and the isosceles trapezoidal column back to the center. The second return spring pushes the arc-shaped plate to be flush with the outer wall of the dustproof cover, and the isosceles trapezoidal column re-abuts to restore the complete circumferential seal, realizing intelligent dustproof protection that is closed when stationary, open when moving, and closed afterward, ensuring the normal movement of the screw nut block and preventing dusty environments from contaminating the bidirectional threaded screw. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the overall installation structure of the device of the present invention;
[0026] Figure 2 This is a three-dimensional schematic diagram of the internal structure of the dust collection tank of the device of the present invention;
[0027] Figure 3 This is a three-dimensional schematic diagram of the internal structure of the cover of the device of the present invention;
[0028] Figure 4 This is a three-dimensional schematic diagram of the internal structure of the dust collector bag in the device of the present invention;
[0029] Figure 5 This is a three-dimensional schematic diagram of the jitter unit structure of the device of the present invention;
[0030] Figure 6 This is a three-dimensional schematic diagram of the disassembled impact unit structure of the device of the present invention;
[0031] Figure 7 This is a three-dimensional schematic diagram of the guide plate and lever engagement state of the device of the present invention;
[0032] Figure 8 This is a three-dimensional schematic diagram of the overall structure of the dust cover of the device of the present invention;
[0033] Figure 9 This is a three-dimensional schematic diagram of the lead screw nut block and collar connection structure of the device of the present invention;
[0034] Figure 10 This is a three-dimensional schematic diagram of the mating structure of the extension drive device of the present invention;
[0035] Figure 11 This is a three-dimensional schematic diagram of the disassembled structure of the extension drive device of the present invention;
[0036] In the diagram: SDS desulfurization reactor-11; feeder-12; dust collector-13; SCR denitrification reactor-14; ammonia tank-15; dust collector bag-16; shelf-17; support frame-18; support rod-19; flue gas discharge port-20; base-21; hood-22; flue gas inlet pipe-23; flue gas outlet pipe-24; impeller-25; double-threaded screw-26; bottom plate-27; dust cover-28; guide rod-29; first upright-30; second upright-31; top ring-32; fixing ring-33; first shaking ring-34; second shaking ring-35; resonant spring-36; collar-37; partition plate-38; impact block-39; frame-40; impact rod-41; limit plate-42; return spring-43; End plate-44; shift fork-45; shift lever-46; pivot shaft-47; fork body-48; jump bar-49; return spring-50; pressure ring-51; guide plate-52; inclined guide rod-53; guide wheel-54; pin shaft-55; lead screw nut block-56; lifting plate-57; arc plate-58; connecting rod-59; side push block-60; isosceles trapezoidal column-61; arc guide rod-62; lead screw mating hole-63; guide hole-64; clearance groove-65; arc guide groove-66; first return spring-67; lifting clearance groove-68; second return spring-69. Detailed Implementation
[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
[0038] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0039] Figures 1-11As shown, the device for dry desulfurization coupled with high-efficiency dust removal and denitrification of flue gas from biomass boilers includes an SDS desulfurization reactor 11, a feeder 12, a dust collector 13, an SCR denitrification reactor 14, and an ammonia tank 15 connected by pipelines. Dust collector bags 16 are vertically installed inside the dust collector 13. Shelves 17 are sealed and fixedly installed at intervals from the top plate inside the dust collector 13. A flue gas discharge port 20 is opened on the top plate of the dust collector 13. Openings are provided on the shelves 17, and the dust collector bags 16 pass through the openings in the shelves 17. The top ring 32 of the dust collector bags 16 is sealed and connected to the openings in the shelves 17. A base 27 is sealed and connected to the bottom end of the dust collector bags 16. A base 21 and a cover 22 are fixedly connected below the base 27. The base 27 is fixedly installed on the top of the base 21. The base 21 is fixedly connected to the inner wall of the dust collector 13 via the support frame 18; an impeller 25 is rotatably installed inside the cover 22; a flue gas inlet pipe 23 and a flue gas outlet pipe 24 are provided on both sides of the side wall of the cover 22 by means of axial misalignment; the other end of the flue gas inlet pipe 23 is connected to the upstream flue gas port, and the other end of the flue gas outlet pipe 24 is connected to the inner cavity of the dust collector 13; a transmission component is provided on the impeller 25, and the transmission component extends in a sealed manner into the dust collector bag 16; a shaking component is provided on the side of the power component; when the flue gas to be dusted enters the cover 22 and drives the impeller 25, the transmission component drives the shaking component to shake off the dust adhering to the dust collector bag 16;
[0040] The top ring 32 of the dust collector bag 16 is sealed to the opening of the shelf plate 17. The top ring 32 extends outward to form a concave ring structure (not shown in the figure). The concave ring structure is provided with elastic steel wires. The elastic steel wires facilitate the deformation of the concave ring structure to extend into the opening of the shelf plate 17. At the same time, the elastic steel wires have a reset function to make the concave ring structure form a sealed connection with the inner wall of the opening.
[0041] Under normal operating conditions, the flue gas flow rate of a biomass boiler has a relatively stable basic characteristic. When the boiler combustion system is running at the design load, the flue gas volume fluctuates within the range of ±15-20% of the design value, which is within the normal range of operating conditions. Modern biomass boilers are equipped with automatic feeding systems and combustion control systems, which can maintain a relatively stable combustion state, and the fluctuation of flue gas parameters has predictable and periodic characteristics.
[0042] More importantly, in this invention, the dust removal equipment's cleaning operation is intermittent, requiring no continuous, constant cleaning action. In a biomass boiler dust removal system, as flue gas passes through the dust removal equipment, dust particles gradually deposit on the surface of the filter bags 16. The frequency and intensity of the cleaning action are matched to the dust load, and can be performed without following a fixed pattern. When the boiler is operating at high load, the dust content in the flue gas is high, and the dust accumulation rate on the filter bags 16 is fast. At this time, more frequent and stronger cleaning actions are needed to maintain dust removal efficiency. This high-frequency cleaning is a normal operating characteristic of the equipment and is beneficial for maintaining the efficient operation of the dust removal system. When the boiler is operating at low load, the dust content in the flue gas is relatively low, and the dust accumulation rate is slow, so the cleaning frequency can be reduced accordingly, and the cleaning intensity can also be appropriately weakened. This intermittent, variable-frequency cleaning mode fully conforms to the working rules and actual needs of the dust removal equipment.
[0043] This intermittent characteristic perfectly matches the technical solution of this invention.
[0044] The device of the present invention performs dust removal treatment on the flue gas entering the dust collector 13. It converts the kinetic energy of the flue gas to be treated into the power to start the device, which can intermittently drive the shaking unit. The shaking ring of the shaking unit not only supports the dust collector bag 16 to prevent it from being dented and flattened, but also provides continuous shaking to clean the dust adhering to the outside of the dust collector bag 16, greatly reducing the frequency of shutdown for cleaning. It significantly enhances the dust removal capacity of the device without affecting the working conditions. It can also effectively control the displacement of the components in the initial state of being impacted, avoiding damage to the device structure. The following will describe this in detail.
[0045] Furthermore, the transmission assembly includes a bidirectional threaded screw 26 and a guide rod 29. A support rod 19 is radially fixed at the top of the shelf 17. One end of the bidirectional threaded screw 26 is fixedly mounted on the impeller 25 and rotatably connected to the base 21 through a sealed bearing. The other end of the bidirectional threaded screw 26 extends to the top of the dust collector bag 16 and is rotatably mounted in the support rod 19 through a bearing. A matching screw nut block 56 is provided on the bidirectional threaded screw 26. The guide rod 29 slides through the screw nut block 56 and its two ends are fixedly connected to the support rod 19 and the base plate 27, respectively.
[0046] It should be noted that the lead screw nut block 56 is provided with a lead screw mating hole 63 through which the bidirectional threaded lead screw 26 passes, and the lead screw nut block 56 is also provided with a guide hole 64, in which the guide rod 29 slides through the guide hole 64.
[0047] Furthermore, the shaking assembly includes an impact unit and a shaking unit. The shaking unit includes a fixed ring 33, a first shaking ring 34, and a second shaking ring 35 arranged sequentially from the inside to the outside. The three rings are elastically connected by several resonant springs 36 arranged in an array. Two sets of uprights are symmetrically arranged on both sides of the bidirectional threaded screw 26. Each set of uprights includes a first upright 30 and a second upright 31 arranged sequentially from the inside to the outside. The two ends of the uprights are fixedly connected to a support rod 19 and a base plate 27, respectively. The fixed ring 33 is fixedly connected to the first upright 30, and the second shaking ring 35 is fixed to the inner wall of the dust collector bag 16 by stitching. The impact unit is installed between the first upright 30 and the second upright 31. The impact unit is connected to the screw nut block 56 by a guide plate 52. Several impact blocks 39 are integrally formed on the first upright 30. When the shaking unit is driven to impact the impact blocks 39 and generate shaking, it drives the second upright 31 to shake off the dust adhering to the dust collector bag 16.
[0048] Specifically, after the flue gas to be treated enters the device through the flue gas inlet pipe 23, it drives the impeller 25 to rotate, which drives the bidirectional threaded screw 26 to realize the reciprocating linear movement of the screw nut block 56 and the guide plate 52. The guide plate 52 periodically pushes the impact unit to make the fork body 48 switch left and right quickly, generating a violent impact. The fork body 48 hits the end plate 44, and drives the impact rod 41 to overcome the resistance of the return spring 43 and then hit the impact block 39 to generate strong vibration. Under the elastic transmission of the resonant spring 36, the first vibration ring 34 and the second vibration ring 35 will show obvious coordinated vibration. Since the second vibration ring 35 and the dust collector bag 16 are connected by a cloth belt in a stitched manner, the second vibration ring 35 not only provides radial support for the dust collector bag 16 to avoid denting and deformation, but also generates strong vibration or vibration to act on the dust adsorbed on the dust collector bag 16, so as to achieve efficient separation and cleaning.
[0049] It should be noted that the second shaking ring 35 is fixed to the inner wall of the dust collector bag 16 by sewing. Due to the position occupied by the resonant spring 36, it is arranged at intervals during sewing.
[0050] The sewing method tightens the second shaking ring 35 and the dust collector bag 16, so that the second shaking ring 35 supports the dust collector bag 16 and prevents it from collapsing when the external pressure is too great. At the same time, the tightened dust collector bag 16 will shake violently when the shaking ring is impacted, so that the dust adhering to the dust collector bag 16 will fall off quickly. Moreover, the sewing method provides a certain amount of elastic space at the connection between the second shaking ring 35 and the dust collector bag 16, reducing the risk of shaking and tearing and extending the service life of the device.
[0051] The first jitter ring 34 and the second jitter ring 35 are made of highly elastic metal material, which is suitable for maintaining high-frequency vibration, and can be magnesium-lithium alloy.
[0052] Its vibration transmission and dust separation working principle is as follows: When the impact block 39 is subjected to impact excitation, the first shaking ring 34, which is fixedly connected to the impact block 39, first receives the initial impact force, and then the impact energy is effectively transferred to the second shaking ring 35 through the arrayed resonant springs 36. After receiving the impact force, the first shaking ring 34 undergoes elastic deformation and stores the impact energy, and continues to efficiently transfer the amplified vibration energy to the second shaking ring 35 through the resonant springs 36, forming a multi-stage resonant amplification effect. Among them, the resonant springs 36 elastically store energy at the moment of impact, and release the stored energy to form a reverse thrust when the impact force disappears, generating a resonance phenomenon at a specific frequency, which multiplies the vibration amplitude and extends the vibration duration to form a continuous shaking waveform; the second shaking ring 35 and the dust collector bag The inner wall of the filter bag 16 is fixed by a precision stitching connection. This connection method keeps the filter bag 16 taut and forms a uniform tension field. The second shaking ring 35 plays a radial support role to prevent the filter bag from collapsing due to external pressure. When the shaking ring is subjected to a resonant amplified impact force, the taut filter bag 16 forms a large-amplitude shaking under tension constraint. The stitching connection is designed with a certain elastic space to reduce the risk of tearing of the filter bag by high-frequency shaking. The fixing ring 33, the first shaking ring 34 and the second shaking ring 35 are connected by a highly elastic material. This not only effectively controls the displacement of the components in the initial state of impact to avoid damage to the device structure, but also converts the instantaneous impact energy into continuous and stable shaking for deep dust cleaning, ensuring the continuity and reliability of the dust removal effect.
[0053] Furthermore, the impact unit includes a fork 45, a lever 46, and a jump rod 49. A rotating shaft 47 is fixedly threaded through the lever 46, and the rotating shaft 47 is rotatably mounted between the first upright 30 and the second upright 31 via a bearing. The jump rod 49 is rotatably mounted between the first upright 30 and the second upright 31 via a pin 55. The end of the lever 46 away from the rotating shaft 47 has a fork 48, and the end of the jump rod 49 away from the pin 55 has a sliding groove. The sliding groove is adjacent to the end of the jump rod 49. The fork bodies 48 are spaced apart, and guide rods are fixedly installed between them, slidingly passing through the grooves. A retaining ring is fixed at one end of the jump rod 49 near the pin 55, and a pressure ring 51 is slidably sleeved on the jump rod 49. A return spring 50 is installed between the pressure ring 51 and the retaining ring, and the return spring 50 is sleeved on the outer circumferential surface of the jump rod 49. The rotating shaft 47 extends towards the bidirectional threaded screw 26 and a lever 46 is fixed at its end, parallel to the fork 45. In the static position of the fork body 48... Two frames 40 are installed on a horizontal plane, with the top plates of the frames 40 vertically positioned. The two frames 40 are symmetrically fixed to the first upright 30 and the second upright 31. A partition 38 is fixed inside each frame 40, dividing the interior into two areas. An impact rod 41 slides through the top plate of the frame and the partition 38. A limiting plate 42 and a return spring 43 are respectively fitted onto the impact rod 41 located between the top plate of the frame and the partition 38. The limiting plate 42 is fixedly connected to the impact rod 41, and the return spring 43... Located between the limiting plate 42 and the top plate of the frame 40; an end plate 44 is fixed on one end of the impact rod 41 near the fork 48, the end plate 44 bears the impact of the fork 48, and an impact head is provided on the other end of the impact rod 41. The impact head is used to impact the impact block 39, and the impact head is automatically reset under the action of the return spring 43; when the lever 46 is driven to rotate, it drives the fork 45 to swing and switch the left and right positions through the rotating shaft 47, and the fork 48 forms a violent impact under the action of the return spring 50.
[0054] The impact unit of the device of the present invention transforms the reciprocating linear movement of the lead screw nut block 56 into a periodic left-right rapid switching action, creating the inherent conditions for a violent impact to generate strong vibration and providing continuous power conversion. It realizes intelligent operation of automatically cleaning dust without the need for additional power configuration under working conditions. Moreover, it is designed using the lever principle, and cleverly triggers the elastic release of the return spring 50 with the small force of the movement of the lead screw nut block 56. There is no need to equip an additional or even large power source. It simply makes full use of the energy stored in the return spring 50 to completely convert it into strong vibration energy. The following will be described in detail.
[0055] Furthermore, a guide plate 52 is fixedly connected to one side of the lead screw nut block 56, and an inclined guide rod 53 and a guide wheel 54 are fixedly installed on the other side of the guide plate 52. The inclined guide rod 53 and the guide wheel 54 are located at opposite corners of the guide plate 52, and the inclined guide rod 53, the guide wheel 54 and the lever 46 are in the same vertical plane. The end of the lever 46 away from the rotating shaft 47 extends outward to form an enlarged end. The inclined surface of the inclined guide rod 53 faces the lever 46, and the top of the inclined guide rod 53 faces the same direction as the enlarged end. The inclined guide rod 53 is wider at the top and narrower at the bottom. When the guide plate 52 moves upward with the lead screw nut block 56, the guide wheel 54 pushes the adjacent lever 46 to the other side. When the guide plate 52 moves downward, the inclined guide rod 53 pushes the adjacent lever 46 to move to the initial side.
[0056] More importantly, the guide plate 52 is a solid plate. To facilitate observation of the interconnections, in Figure 7 In the middle, the inside of the guide plate 52 is hollowed out, exposing the shape of the lever 46, the inclined guide rod 53 and the guide wheel 54.
[0057] It should be noted that the lead screw nut block 56 is provided with a lead screw mating hole 63 through which the bidirectional threaded lead screw 26 passes, and the lead screw nut block 56 is also provided with a guide hole 64, in which the guide rod 29 slides through the guide hole 64.
[0058] Furthermore, a dust cover 28 is provided on the outer periphery of the lead screw nut block 56. The two ends of the dust cover 28 are respectively fixed with a support rod 19 and a base plate 27. A collar 37 is slidably sleeved on the outer peripheral surface of the dust cover 28. A through groove is opened on the dust cover 28 along the axis. The lead screw nut block 56 extends to the outside of the dust cover 28 through the through groove. The lead screw nut block 56 is fixedly connected to the collar 37. The collar 37 is fixedly connected to the guide plate 52. A dustproof unit is provided in the through groove. When the extended part of the lead screw nut block 56 moves through, the dustproof unit opens to avoid it. After it moves through, the dustproof unit automatically closes.
[0059] It should be noted that after opening the through groove on the dust cover 28, the dust cover unit can be set up. Alternatively, the through groove can be opened symmetrically on the dust cover 28, and then the dust cover unit can be set up symmetrically to enhance the stability of the screw nut block 56. Two sets of impact units can also be set up in a circular array to enhance the stability of the structure. Multiple sets of impact units and shaking units can be set up along the axis of the dust collector bag 16 according to the usage, which is beneficial for dust removal.
[0060] Specifically, as the guide plate 52 moves upward with the lead screw nut block 56, the guide wheel 54 powerfully pushes the lever 46 on its side, smoothly transferring it to the other side. Because it is coaxially fixed with the rotating shaft 47, the shift fork 45 is precisely driven to rotate. During rotation, the fork body 48 presses the pressure ring 51 downward, gradually compressing the return spring 50 to store elastic potential energy, simultaneously driving the shift fork 45 to rotate. When the fork body 48, integrated with the shift fork 45, rotates beyond the critical center position of the rotating shaft 47 and the pin 55, the lever 46 momentarily enters a free state and, under the strong elastic action of the return spring 50, rapidly pushes the pressure ring 51 to the other side. Ring 51 quickly approaches the other side of fork 48, causing shift fork 45 to rotate rapidly around axis 47, and jump bar 49 to rotate synchronously around pin 55, instantly completing the rapid switching action of fork 48 from left to right; the switching action causes fork 48 to violently strike end plate 44, powerfully driving impact rod 41 to overcome the resistance of return spring 43 and quickly strike impact block 39, completing the efficient energy transfer to the vibration unit to form continuous vibration. Under the reset action of return spring 43, impact rod 41 automatically returns to its position, effectively avoiding continuous contact with impact block 39 and affecting its free vibration effect, ensuring the efficiency of impact transmission and the continuity of vibration;
[0061] As the guide plate 52 moves downward with the lead screw nut block 56, the inclined surface of the inclined guide rod 53 precisely presses against the lever 46 located on this side, causing it to move smoothly to the other side. The inclined guide rod 53 and the guide wheel 54 maintain a precise fit at a fixed interval, ensuring that no mechanical interference occurs during the switching of the lever 46's position. This achieves smoothness and reliability in the bidirectional switching process, forming a continuous and stable impact cycle and ensuring the continuity of the shaking and dust removal effect.
[0062] Furthermore, the dustproof unit includes a fixedly connected isosceles trapezoidal column 61 and an arc-shaped guide rod 62. Relief grooves 65 are respectively opened on the inner walls of the through groove of the dustproof cover 28. An arc-shaped guide groove 66 is further deepened along the circumferential direction within the relief groove 65. The arc-shaped guide rod 62 is slidably installed within the arc-shaped guide groove 66. The small end faces of two isosceles trapezoidal columns 61 arranged in the same radial direction abut against each other. An arc-shaped plate 58 is provided at the bottom of each isosceles trapezoidal column 61. The two arc-shaped plates 58 abut against each other, filling the through groove of the dustproof cover 28 to form a complete outer circumference, effectively preventing dust from entering the bidirectional threaded screw 26. An extension drive mechanism is provided on the connecting rod 59. When the screw nut block 56 is driven, the extension drive mechanism pushes the adjacent arc-shaped plate 58 into the relief grooves 65 on both sides, forming a relief channel.
[0063] The dust cover 28 of the present invention is provided with a dustproof unit to ensure that the lead screw nut block 56 effectively isolates dust when moving along the bidirectional threaded lead screw 26, maintaining a clean working condition. The dustproof unit not only ensures that the dust cover 28 is in a completely closed state when stationary, but also ensures that it is in a temporarily open state when the extension part of the bidirectional threaded lead screw 26 passes through the through slot of the dust cover 28. After passing through, the dustproof unit automatically closes in time, forming a dynamic sealing protection system, which will be described in detail below.
[0064] Furthermore, the extension drive mechanism includes a lifting plate 57 and a side pusher block 60. The side pusher block 60 and the lifting plate 57 are fixed to the connecting rod 59 from top to bottom and maintain an appropriate vertical spacing. The lifting plate 57 and the side pusher block 60 extend axially to both sides along the dust cover 28 on the connecting rod 59, respectively, wherein the length of the lifting plate 57 is greater than that of the side pusher block 60. A wedge structure is provided on the side of the lifting plate 57 near the arc-shaped plate 58, and an isosceles triangular prism is fixed on the side of the side pusher block 60 near the isosceles trapezoidal column 61. Angle post; the arc-shaped guide groove 66 is further deepened along the radial center direction to form a lifting clearance groove 68, providing sufficient clearance space for the arc-shaped guide rod 62 to move along the center direction; when the extension drive mechanism is driven to move along the length direction of the through groove, the lifting plate 57 first lifts the arc-shaped plate 58 to the height of the clearance groove 65, and then the isosceles triangular prism of the side push block 60 abuts against the isosceles trapezoidal prisms 61 on both sides, and pushes the arc-shaped plate 58 and the isosceles trapezoidal prisms 61 together into the clearance grooves 65 on both sides to form a clearance channel;
[0065] It should be noted that when the extension drive mechanism slides inside the through groove of the dust cover 28 along with the lead screw nut block 56, the lifting plate 57 first lifts the bottom of the arc plate 58 through the inclined surface of the wedge structure, so that the arc plate 58 and the arc guide rod 62 move together in the radial center direction; the arc guide rod 62 slides radially in the arc guide groove 66 and compresses the second return spring 69, moving the arc plate 58, which was originally flush with the outer wall of the dust cover 28, to above the bottom height of the clearance groove 65;
[0066] Immediately thereafter, the isosceles triangular prism of the side push block 60 contacts the two adjacent isosceles trapezoidal prisms 61 and pushes them into the clearance grooves 65 on both sides, providing a smooth passage for the connecting rod 59; at this time, the arc-shaped guide rod 62 simultaneously compresses the first return spring 67 and the second return spring 69.
[0067] After the connecting rod 59 and the extension drive mechanism are separated, under the reset force of the first reset spring 67, the arc plates 58 and the isosceles trapezoidal column 61 on both sides are pushed back into the through groove. The reset action of the second reset spring 69 pushes the arc plate 58 to be flush with the outer wall of the dust cover 28, so that the dust cover 28 with the through groove can re-form a complete circumferential tube wall, effectively reducing the entry of dust.
[0068] By setting a dustproof unit in the through slot, the dustproof unit will intelligently open to avoid the movement of the extended part of the lead screw nut block 56; after the movement has passed, the dustproof unit will automatically close, thus achieving a good dustproof effect.
[0069] Furthermore, a first return spring 67 is fixed at the bottom of the arc-shaped guide groove 66, and a sliding plate is fixed at the free end of the first return spring 67, which slides against the end of the arc-shaped guide rod 62; a second return spring 69 is fixed at the top of the lifting clearance groove 68, and an arc-shaped sliding plate is fixed at the free end of the second return spring 69, which slides against the top of the arc-shaped guide rod 62.
[0070] When the system is stationary, the small end faces of two radially opposed isosceles trapezoidal columns 61 abut tightly to form a central sealing point. The arc-shaped plate 58 fixed at the bottom of the isosceles trapezoidal column 61, under the thrust of the first return spring 67 and the second return spring 69, is flush with the outer wall of the dust cover 28. The two radially opposed arc-shaped plates 58 tightly abut completely fill the through groove of the dust cover 28, forming a continuous outer circumferential structure. The arc-shaped guide rod 62 is stably installed in the arc-shaped guide groove 66 under the combined action of the first return spring 67 and the second return spring 69. The entire dustproof unit is sealed, preventing dust from entering the transmission area of the bidirectional threaded screw 26. When the screw nut block 56 begins to move, the extension drive mechanism fixed on the connecting rod 59 starts synchronously, lifting... The lifting plate 57, using its wedge structure, contacts the bottom of the arc-shaped plate 58 and applies an upward wedge force. The wedge structure lifts the arc-shaped plate 58, causing it and the arc-shaped guide rod 62 to move radially. The arc-shaped guide rod 62 slides within the arc-shaped guide groove 66 and compresses the second return spring 69, moving the arc-shaped plate 58 above the bottom height of the clearance groove 65. Subsequently, the isosceles triangular prism fixed on the side push block 60 contacts two isosceles trapezoidal prisms 61, pushing them simultaneously into the clearance grooves 65 through a wedge action, achieving separation. The arc-shaped plate 58 is then pushed into the clearance groove 65, providing a passage for the connecting rod 59. At this time, the arc-shaped guide rod 62 experiences dual displacement, compressing both the first return spring 67 and the second return spring 69. The second return spring 69 stores elastic potential energy; during the process of the connecting rod 59 passing through the through groove, the dustproof unit remains open, the arc plate 58 and the isosceles trapezoidal column 61 remain stably in the clearance groove 65 to ensure the smooth passage of the lead screw nut block 56, and the arc guide rod 62 remains compressed in the lifting clearance groove 68 to provide clearance space; when the connecting rod 59 completely leaves the through groove, the reset mechanism is activated, the first return spring 67 pushes the arc guide rod 62 back to its original position through the sliding plate, and drives the arc plate 58 and the isosceles trapezoidal column 61 back to the center position of the through groove, the second return spring 69 applies a vertical reset force through the arc sliding plate to push the arc plate 58 to the sealing position flush with the outer wall of the dust cover 28, and the small end faces of the two isosceles trapezoidal columns 61 are reset. Upon contact, the arc-shaped plate 58 returns to a tight fit, allowing the dust cover 28 to re-form a complete circumferential tube wall and restore the dustproof seal. The first return spring 67 is mainly responsible for the radial return force to ensure that the isosceles trapezoidal column 61 and the arc-shaped plate 58 are horizontally returned to their original positions. The second return spring 69 provides the axial return force to ensure that the arc-shaped plate 58 is tightly fitted to the outer wall of the dust cover 28. The two springs slide against the arc-shaped guide rod 62 through the sliding plate and the arc-shaped sliding plate to ensure that the reset process is smooth and reliable. Through this dynamic sealing mechanism, the dustproof unit achieves full enclosure when stationary and intelligent opening and automatic closing when in motion, which not only ensures the normal reciprocating motion of the screw nut block 56 but also prevents the dusty environment from contaminating the bidirectional threaded screw 26 transmission system, thereby improving the reliability and service life of the device.
[0071] Furthermore, the lower part of the SDS desulfurization reactor 11 is connected to an air inlet pipe, and the upper part of the SDS desulfurization reactor is connected to the lower part of the inner cavity of the dust collector 13 through a first pipe. The upper part of the outer surface of the dust collector 13 is provided with a second pipe for connecting the exhaust chamber to the upper part of the inner cavity of the SCR denitrification reactor 14. One side of the outer surface of the SDS desulfurization reactor 11 is connected to a feeder 12 for conveying sodium bicarbonate powder, and the ammonia tank 15 is connected to the upper part of the inner cavity of the second pipe through a third pipe.
[0072] In operation, the flue gas to be treated enters the SDS desulfurization reactor 11 through the inlet pipe. The feeder 12 delivers baking soda powder to the SDS desulfurization reactor 11 to react with sulfur dioxide in the flue gas, achieving desulfurization. Subsequently, the flue gas enters the dust collector 13 and passes through the dust collector bag 16 to filter the dust in the flue gas. The flue gas then enters the second through pipe. At the same time, ammonia water in the ammonia water tank 15 is sprayed into the second through pipe to react with the flue gas. The flue gas in the second through pipe enters the SCR denitrification reactor 14 to react with the catalyst to reduce the concentration of nitrogen oxides, achieving denitrification. Finally, the exhaust fan discharges the flue gas after desulfurization and denitrification treatment into the atmosphere through the chimney.
[0073] The present invention has been illustrated through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that all related improvements to the present invention fall within the protection and disclosure scope of the present invention.
Claims
1. A device for dry desulfurization coupled with high-efficiency dust removal and denitrification of flue gas from biomass boilers, comprising an SDS desulfurization reactor (11), a feeder (12), a dust collector (13), an SCR denitrification reactor (14), and an ammonia tank (15) connected by pipelines, wherein dust collector bags (16) are vertically installed inside the dust collector (13), characterized in that, The dust collector (13) is sealed with a shelf (17) at intervals from the top plate. The top plate of the dust collector (13) has a flue gas discharge port (20). The shelf (17) has an opening. The dust collector bag (16) is inserted into the opening of the shelf (17). The top ring (32) of the dust collector bag (16) is sealed to the opening of the shelf (17). The bottom end of the dust collector bag (16) is sealed to the bottom plate (27). The bottom plate (27) has a fixedly connected base (21) and cover (22) below it. The bottom plate (27) is fixedly installed on the top of the base (21). The base (21) is fixedly connected to the inner wall of the dust collector (13) by a support frame (18). An impeller (25) is rotatably installed inside the cover (22). The two sides of the side wall of the cover (22) are provided with a flue gas inlet pipe (23) and a flue gas outlet pipe (24) by means of axial misalignment. The other end of the flue gas inlet pipe (23) is connected to the upstream flue gas outlet, and the other end of the flue gas outlet pipe (24) is connected to the inner cavity of the dust collector (13); a transmission component is provided on the impeller (25), and the transmission component extends into the dust collector bag (16) in a sealed manner; a shaking component is provided on the side of the power component; when the flue gas to be dusted enters the hood (22) and drives the impeller (25), the transmission component drives the shaking component to shake off the dust adhering to the dust collector bag (16); The transmission assembly includes a bidirectional threaded screw (26) and a guide rod (29). A support rod (19) is fixed radially at the top of the shelf (17). One end of the bidirectional threaded screw (26) is fixedly mounted on the impeller (25) and rotatably connected to the base (21) through a sealed bearing. The other end of the bidirectional threaded screw (26) extends to the top of the dust collector bag (16) and is rotatably mounted in the support rod (19) through a bearing. A matching screw nut block (56) is provided on the bidirectional threaded screw (26). The guide rod (29) slides through the screw nut block (56) and its two ends are fixedly connected to the support rod (19) and the base plate (27) respectively. The vibration assembly includes an impact unit and a vibration unit. The vibration unit includes a fixed ring (33), a first vibration ring (34), and a second vibration ring (35) arranged sequentially from the inside to the outside. The three rings are elastically connected by several resonant springs (36) arranged in an array. Two sets of uprights are symmetrically arranged on both sides of the bidirectional threaded screw (26). Each set of uprights includes a first upright (30) and a second upright (31) arranged sequentially from the inside to the outside. The two ends of the uprights are fixedly connected to a support rod (19) and a base plate (27), respectively. The fixed ring (33) 3) The second shaking ring (35) is fixedly connected to the first upright (30), and the inner wall of the dust collector bag (16) is fixed by stitching. The impact unit is installed between the first upright (30) and the second upright (31). The impact unit is connected to the lead screw nut block (56) through the transmission of the guide plate (52). Several impact blocks (39) are integrally formed on the first upright (30). When the shaking unit is driven to impact the impact block (39) and shake, it drives the second upright (31) to shake off the dust adhering to the dust collector bag (16).
2. The device for dry desulfurization coupled with high-efficiency dust removal and denitrification of flue gas from biomass boilers according to claim 1, characterized in that, The impact unit includes a fork (45), a lever (46), and a jump rod (49). A rotating shaft (47) is fixedly threaded through the lever (46), and the rotating shaft (47) is rotatably mounted between the first upright (30) and the second upright (31) via a bearing. The jump rod (49) is rotatably mounted between the first upright (30) and the second upright (31) via a pin (55). The end of the lever (46) away from the rotating shaft (47) has a fork (48), and the end of the jump rod (49) away from the pin (55) has a groove. The groove and the jump rod (49) are connected. 9) The upper and lower ends are kept at a distance, and a guide rod is fixedly installed between the forks (48), and the guide rod slides through the groove; a retaining ring is fixedly installed on the end of the jump rod (49) near the pin (55), and a pressure ring (51) is slidably sleeved on the jump rod (49). A return spring (50) is installed between the pressure ring (51) and the retaining ring, and the return spring (50) is sleeved on the outer peripheral surface of the jump rod (49); the rotating shaft (47) extends in the direction of the bidirectional threaded screw (26) and a lever (46) is fixed at the end, and the lever (46) is parallel to the fork (45). ; Two frames (40) are set on the horizontal plane where the static fork (48) is located. The top plate of the frame (40) is set vertically. The two frames (40) are symmetrically fixed on the first upright (30) and the second upright (31). An impact rod (41) is slidably inserted on the top plate of the frame and the partition (38). A limiting plate (42) and a return spring (43) are respectively fitted on the impact rod (41) located between the top plate of the frame and the partition (38). The limiting plate (42) is fixedly connected to the impact rod (41). The return spring (43) is located on the limiting plate (42). 42) Between the top plate of the frame (40); an end plate (44) is fixed on one end of the impact rod (41) near the fork (48), the end plate (44) bears the impact of the fork (48), and an impact head is provided on the other end of the impact rod (41). The impact head is used to impact the impact block (39). After the impact head is impacted, it automatically resets under the action of the return spring (43); when the lever (46) is driven to rotate, the fork (45) is driven to swing and switch the left and right positions through the rotating shaft (47). The fork (48) forms a violent impact under the action of the return spring (50).
3. The device for dry desulfurization coupled with high-efficiency dust removal and denitrification of flue gas from biomass boilers according to claim 2, characterized in that, One side of the lead screw nut block (56) is fixedly connected to a guide plate (52), and the other side of the guide plate (52) is fixedly installed with an inclined guide rod (53) and a guide wheel (54). The inclined guide rod (53) and the guide wheel (54) are located at opposite corners of the guide plate (52). The inclined guide rod (53), the guide wheel (54), and the lever (46) are in the same vertical plane. The end of the lever (46) away from the rotating shaft (47) extends outward in a circular shape. The inclined guide rod (53) is swollen at the top, with its inclined surface facing the lever (46). The top of the inclined guide rod (53) faces the same direction as the swollen end. The inclined guide rod (53) is wide at the top and narrow at the bottom. When the guide plate (52) moves upward with the screw nut block (56), the guide wheel (54) pushes the adjacent lever (46) to the other side. When the guide plate (52) moves downward, the inclined guide rod (53) pushes the adjacent lever (46) to move to the initial side.
4. The device for dry desulfurization coupled with high-efficiency dust removal and denitrification of flue gas from biomass boilers according to claim 1, characterized in that, A dust cover (28) is provided on the outer periphery of the lead screw nut block (56). A support rod (19) and a base plate (27) are fixed at both ends of the dust cover (28). A collar (37) is slidably fitted on the outer periphery of the dust cover (28). A through groove is opened on the dust cover (28) along the axis. The lead screw nut block (56) extends to the outside of the dust cover (28) through the through groove. The lead screw nut block (56) is fixedly connected to the collar (37). The collar (37) is fixedly connected to the guide plate (52). A dustproof unit is provided in the through groove. When the extension part of the lead screw nut block (56) moves through, the dustproof unit opens to avoid it. After it moves through, the dustproof unit automatically closes.
5. The device for dry desulfurization coupled with high-efficiency dust removal and denitrification of flue gas from biomass boilers according to claim 4, characterized in that, The dustproof unit includes a fixedly connected isosceles trapezoidal column (61) and an arc-shaped guide rod (62). The inner walls of the through groove of the dustproof cover (28) are respectively provided with clearance grooves (65). The clearance grooves (65) are further deepened along the circumferential direction to provide arc-shaped guide grooves (66). The arc-shaped guide rod (62) is slidably installed in the arc-shaped guide groove (66). The small end faces of the two isosceles trapezoidal columns (61) arranged opposite to each other in the same radial direction abut against each other. The bottom of the isosceles trapezoidal column (61) is provided with arc-shaped plates (58). The two arc-shaped plates (58) in the same radial direction abut against each other, filling the through groove of the dustproof cover (28) to form a complete outer circumference, effectively preventing dust from entering the bidirectional threaded screw (26). The connecting rod (59) is provided with an extension drive mechanism. When the screw nut block (56) is driven, it drives the extension drive mechanism to push the adjacent arc-shaped plate (58) into the clearance grooves (65) on both sides to form a clearance channel.
6. The device for dry desulfurization coupled with high-efficiency dust removal and denitrification of flue gas from biomass boilers according to claim 5, characterized in that, The extension drive mechanism includes a lifting plate (57) and a side pusher block (60). The side pusher block (60) and the lifting plate (57) are fixed from top to bottom on the connecting rod (59) and maintain an appropriate vertical spacing. The lifting plate (57) and the side pusher block (60) are respectively formed on the connecting rod (59) extending axially towards both sides along the dust cover (28), wherein the length of the lifting plate (57) is greater than that of the side pusher block (60). A wedge structure is provided on the side of the lifting plate (57) near the arc plate (58), and an isosceles trapezoidal column (61) is fixed on the side of the side pusher block (60). The isosceles triangular prism; the arc-shaped guide groove (66) is further deepened along the radial center direction to open the lifting clearance groove (68), providing sufficient clearance space for the arc-shaped guide rod (62) to move along the center direction; when the extension drive mechanism is driven to move along the length direction of the through groove, the lifting plate (57) first lifts the arc plate (58) to the height of the clearance groove (65), and then the isosceles triangular prism of the side push block (60) abuts against the isosceles trapezoidal prisms (61) on both sides, and pushes the arc plate (58) and the isosceles trapezoidal prisms (61) together into the clearance grooves (65) on both sides to form a clearance channel.
7. The device for dry desulfurization coupled with high-efficiency dust removal and denitrification of flue gas from biomass boilers according to claim 6, characterized in that, A first reset spring (67) is fixed at the bottom of the arc-shaped guide groove (66), and a sliding plate is fixed at the free end of the first reset spring (67). The sliding plate slides against the end of the arc-shaped guide rod (62). A second reset spring (69) is fixed at the top of the lifting clearance groove (68), and an arc-shaped sliding plate is fixed at the free end of the second reset spring (69). The arc-shaped sliding plate slides against the top of the arc-shaped guide rod (62).
8. The device for dry desulfurization coupled with high-efficiency dust removal and denitrification of flue gas from biomass boilers according to claim 1, characterized in that, The lower part of the SDS desulfurization reactor (11) is connected to an air inlet pipe, and the upper part of the SDS desulfurization reactor is connected to the lower part of the inner cavity of the dust collector (13) through a first pipe. The upper part of the outer surface of the dust collector (13) is provided with a second pipe for connecting the exhaust chamber to the upper part of the inner cavity of the SCR denitrification reactor (14). One side of the outer surface of the SDS desulfurization reactor (11) is connected to a feeder (12) for conveying sodium bicarbonate powder. The ammonia tank (15) is connected to the upper part of the inner cavity of the second pipe through a third pipe.