Flue gas desulfurization and dust removal device and method

Abstract

The invention belongs to the technical field of flue gas desulfurization and dust removal, and discloses a flue gas desulfurization and dust removal device and method.The flue gas desulfurization and dust removal device comprises a desulfurization tower body and a flue gas cooling device, the flue gas cooling device is provided with a flue gas inlet pipe and a flue gas outlet pipe, the flue gas outlet pipe is connected with a flue gas inlet of the desulfurization tower body, and the flue gas dust removal device is arranged on the flue gas outlet pipe; and a desulfurization assembly is detachably arranged in the desulfurization tower main body. Deformation of the filter plate due to too high temperature of flue gas can be avoided, dust in flue gas can be effectively removed, and gypsum is prevented from blocking a pipeline.

Description

Technical Field

[0001] This invention belongs to the field of flue gas desulfurization and dust removal technology, specifically relating to a flue gas desulfurization and dust removal device and method. Background Technology

[0002] Flue gas desulfurization and dust removal are core measures for air pollution control. They effectively reduce particulate matter and sulfur dioxide concentrations, lower the risk of photochemical smog, and improve urban and regional air quality. Sulfur dioxide (SO2) is a major precursor to acid rain; desulfurization can significantly reduce the content of acidic substances in the atmosphere, protecting water bodies, soil, and vegetation. Furthermore, particulate matter pollution in flue gas can damage plant growth; desulfurization and dust removal help maintain ecological balance.

[0003] However, existing dust removal devices in the flue gas desulfurization section of thermal power plants have the following drawbacks: 1. If the temperature of the flue gas is too high after it is generated, the filter plate will easily deform, which will also affect the service life of the filter plate and the device.

[0004] 2. When flue gas enters through the inlet pipe, it carries a large amount of dust particles, including some larger particles. If not cleaned in time, these particles can easily clog the filter plate, thus affecting the subsequent flue gas desulfurization.

[0005] 3. Flue gas desulfurization generally involves setting up limestone in the desulfurization tower for desulfurization. However, limestone desulfurization will produce a large amount of gypsum. The gypsum particles produced by desulfurization are small and highly viscous, which easily adhere to the surface of pipes and other components, forming hard or soft scale, thus causing blockage. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention aims to provide a flue gas desulfurization and dust removal device and method. The present invention can prevent the filter plate from deforming due to excessively high flue gas temperature, and at the same time can effectively remove dust from the flue gas and prevent gypsum from clogging the pipes.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A flue gas desulfurization and dust removal device includes a desulfurization tower body and a flue gas cooling device. The flue gas cooling device has a flue gas inlet pipe and a flue gas outlet pipe. The flue gas outlet pipe is connected to the flue gas inlet of the desulfurization tower body. A flue gas dust removal device is installed on the flue gas outlet pipe. A desulfurization component is detachably installed in the desulfurization tower body.

[0008] Preferably, the flue gas cooling device includes a cooling box 301, which contains a cooling chamber, a pressure sensing module, and a flue gas release chamber. A flue gas inlet pipe is connected to the cooling chamber, and a flue gas outlet pipe is connected to the flue gas release chamber. The flue gas release chamber is connected to the cooling chamber, and a first mounting plate and a movable plate are provided at the connection between them. The movable plate is fitted to the first mounting plate. The first mounting plate has a through hole one, and the movable plate has a through hole two. The pressure sensing module is connected to the movable plate via a driving mechanism. The pressure sensing module is connected to the cooling chamber and can drive the driving mechanism to operate according to changes in the air pressure in the cooling chamber. When the air pressure in the cooling chamber increases, the driving mechanism can drive the movable plate to move, bringing the through hole two closer to the through hole until they intersect, thus connecting the cooling chamber and the flue gas release chamber. When the air pressure in the cooling chamber decreases, the driving mechanism can drive the movable plate to move, moving the through hole two away from the through hole until they are separated, thus cutting off the passage between the cooling chamber and the flue gas release chamber.

[0009] Preferably, the pressure sensing module includes a piston chamber disposed in the cooling box 301. One end of the inner cavity of the piston chamber is connected to the cooling chamber and a sealing plate is slidably disposed thereon. The driving mechanism is coupled to the sealing plate. When the sealing plate slides along the piston chamber, it can drive the driving mechanism to move, thereby moving the movable plate. A recovery device is connected to the sealing plate. The recovery device has the tendency to drive the sealing plate to move, thereby causing the cooling chamber and the flue gas release chamber to change from a connected state to a closed state.

[0010] Preferably, both the movable plate and the first mounting plate are vertically arranged. The movable plate can move up and down. The driving mechanism includes a fixed rod fixed to the bottom of the movable plate and a first pressing block connected to the sealing plate. The fixed rod is vertically arranged, and the first pressing block has an inclined surface. The lower end of the fixed rod is in contact with the inclined surface. When the sealing plate moves, the lower end of the fixed rod slides along the inclined surface.

[0011] Preferably, the lower end of the fixing rod is provided with an arc-shaped block, the arc surface of which convexes outward and contacts the inclined surface.

[0012] Preferably, the recovery device uses a helical spring, with one end of the helical spring fixed and the other end connected to the sealing plate.

[0013] Preferably, the first mounting plate is provided with a guide groove for guiding the movable plate, and the movable plate is connected to the guide groove.

[0014] Preferably, the cooling chamber is equipped with a water-cooling pipe that penetrates the cooling chamber in the cooling box.

[0015] Preferably, the flue gas dust removal device includes a dust collection box with a cylindrical cavity inside. A rotating component is coaxially rotatably connected to the cylindrical cavity. Several scrapers are evenly arranged along the axial direction of the rotating component. The inner end of the scraper is connected to the rotating component, and the outer end of the scraper extends to the side wall of the cylindrical cavity. The dimension of the scraper along the axial direction of the rotating component is not greater than the height of the cylindrical cavity. A flue gas outlet pipe is connected to the dust collection box and communicates with the cylindrical cavity. The end of the flue gas outlet pipe connected to the dust collection box is inclined upward. The dust collection box has a dust removal device outlet at the top of the cylindrical cavity. An arc-shaped filter screen is provided at the dust removal device outlet at the top of the cylindrical cavity. When the rotating component rotates, the outer end of the scraper can contact the arc-shaped filter screen. The dust collection box has a particulate matter collection chamber at the bottom of the cylindrical cavity.

[0016] Preferably, the particulate matter collection chamber is equipped with a pull-out box for collecting particulate matter, and the wall of the dust collection box has a side opening for inserting and pulling out the pull-out box from the particulate matter collection chamber.

[0017] Preferably, the desulfurization component includes a frame, at least two layers of filter plates are spaced apart in the middle of the frame, and limestone is filled between adjacent filter plates; The desulfurization tower body includes a desulfurization tower, the bottom of the desulfurization tower is provided with support legs for supporting it, the desulfurization tower is provided with a groove for inserting the desulfurization component, the desulfurization component is inserted into the groove, the side wall of the desulfurization tower is provided with a side opening for inserting the desulfurization component into the groove, and a baffle for sealing the side opening is detachably connected to the desulfurization tower at the side opening.

[0018] The present invention also provides a flue gas desulfurization and dust removal method, which, through the flue gas desulfurization and dust removal device of the present invention as described above, includes the following processes: Flue gas enters the flue gas cooling device through the flue gas inlet pipe, where it is cooled. The cooled flue gas then flows out of the cooling device through the flue gas outlet pipe. As the flue gas flows through the outlet pipe, the flue gas dust removal device filters out particulate matter. The flue gas filtered by the dust removal device then enters the desulfurization tower body and rises. During its ascent within the desulfurization tower body, the flue gas flows through the desulfurization components, which remove sulfur from the flue gas. When the desulfurization components need to be replaced, they can be disassembled and replaced.

[0019] Compared with the prior art, the present invention has the following beneficial effects: In the flue gas desulfurization and dust removal device of the present invention, the flue gas to be treated is supplied to the flue gas cooling device via the flue gas inlet pipe. By setting up the flue gas cooling device, the flue gas entering the device can be cooled, thus preventing the filter screen in the downstream flue gas dust removal device from deforming and failing due to excessive temperature when the flue gas flows downstream. Therefore, the present invention ensures effective dust removal of the flue gas. Furthermore, the flue gas cooling device can recover heat from the flue gas, exhibiting energy-saving and environmentally friendly characteristics. By setting up a desulfurization tower body, the flue gas after dust removal by the flue gas dust removal device can be desulfurized. The desulfurization tower body is equipped with detachable desulfurization components, allowing for convenient replacement of the components and preventing gypsum blockage caused by limestone desulfurization. In summary, the present invention can prevent excessively high flue gas temperature from causing filter plate deformation, while effectively removing dust from the flue gas and preventing gypsum blockage of the pipes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the flue gas desulfurization and dust removal device in an embodiment of the present invention.

[0021] Figure 2 This is a longitudinal sectional view of the flue gas desulfurization and dust removal device in an embodiment of the present invention.

[0022] Figure 3 for Figure 2 Enlarged view of point A in the image.

[0023] Figure 4 This is a schematic diagram of the structure of the first mounting plate and the movable plate in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the internal structure of the dust removal device in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the connection between the desulfurization component and the desulfurization tower in an embodiment of the invention.

[0026] In the diagram, 1-Desulfurization tower body, 2-Flue gas dust removal device, 3-Flue gas cooling device, 5-Desulfurization components, 101-Desulfurization tower, 102-Observation window, 103-Support leg, 201-Dust collection box, 202-Arc-shaped filter screen, 203-Scraper, 204-Rotating shaft, 205-Rotating component, 206-Pull-out box, 207-Dust removal device outlet, 208-Cylindrical cavity, 209-Particulate matter collection bin, 301-Cooling box, 302-Flue gas outlet pipe, 3 03-Second mounting plate, 304-Helical spring, 305-First compression block, 3051-Inclined surface, 306-Sealing plate, 307-Fluorite inlet pipe, 308-Cooling chamber, 309-Pressure sensing module, 310-Fluorite release chamber, 404-Water cooling pipe, 507-Filter plate, 601-First mounting plate, 602-Through hole one, 603-Modible plate, 604-Through hole two, 605-Fixing rod, 606-Arc block, 607-Slide groove. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] See Figure 1 and Figure 2 This embodiment of the flue gas desulfurization and dust removal device includes a desulfurization tower body 1 and a flue gas cooling device 3. The flue gas cooling device 3 has a flue gas inlet pipe 307 and a flue gas outlet pipe 302. The flue gas outlet pipe 302 is connected to the flue gas inlet of the desulfurization tower body 1. A flue gas dust removal device 2 is installed on the flue gas outlet pipe 302. A desulfurization component 5 is detachably installed in the desulfurization tower body 1. The working process and principle of this embodiment of the flue gas desulfurization and dust removal device are as follows: Flue gas enters the flue gas cooling device 3 through the flue gas inlet pipe 307, where it is cooled. The cooled flue gas then flows out of the flue gas cooling device 3 through the flue gas outlet pipe 302. As the flue gas flows through the flue gas outlet pipe 302, the flue gas dust removal device 2 filters the particulate matter in the flue gas. The flue gas filtered by the flue gas dust removal device 2 enters the desulfurization tower body 1 and rises. During the rise of the flue gas in the desulfurization tower body 1, the flue gas flows through the desulfurization component 5, where it is desulfurized. When the desulfurization component 5 needs to be replaced (for example, when the desulfurization time reaches the preset duration or the desulfurization efficiency drops to the preset level), the desulfurization component 5 can be detached and replaced.

[0029] As a preferred embodiment of the above-mentioned solution of the present invention, in this embodiment, multiple sets of desulfurization components 5 can be arranged at intervals in the vertical direction in the desulfurization tower body 1, which can further improve the desulfurization efficiency.

[0030] In addition, observation windows 102 can be set on the opposite side of each desulfurization component 5 on the main body 1 of the desulfurization tower to observe the desulfurization process of the desulfurization component 5, so as to observe the gypsum production on the desulfurization component 5 at any time and provide a basis for whether to replace the desulfurization component 5.

[0031] As a preferred embodiment of the above-described solution of the present invention, see [reference needed]. Figures 1-3In this embodiment, the flue gas cooling device 3 can adopt the following structure, specifically including a cooling box 301. The cooling box 301 is provided with a cooling chamber 308, a pressure sensing module 309, and a flue gas release chamber 310. The flue gas inlet pipe 307 is connected to the cooling chamber, and the flue gas outlet pipe 302 is connected to the flue gas release chamber. The flue gas release chamber is connected to the cooling chamber. A first mounting plate 601 and a movable plate 603 are provided at the connection between the flue gas release chamber and the cooling chamber. The movable plate 603 is attached to the first mounting plate 601. The first mounting plate 601 is provided with a through hole 602, and the movable plate 603 is provided with a through hole 603. 4. The pressure sensing module is connected to the movable plate 603 via a drive mechanism. The pressure sensing module is connected to the cooling chamber and can drive the drive mechanism to operate according to the changes in air pressure in the cooling chamber. When the air pressure in the cooling chamber increases, the drive mechanism can drive the movable plate 603 to move, so that the second through hole 604 approaches the first through hole 602 until they intersect, thereby connecting the cooling chamber and the flue gas release chamber. When the air pressure in the cooling chamber decreases, the drive mechanism can drive the movable plate 603 to move, so that the second through hole 604 moves away from the first through hole 602 until they are separated, thereby cutting off the passage between the cooling chamber and the flue gas release chamber. The working principle of the flue gas cooling device 3 in this embodiment is as follows: Flue gas first enters the cooling chamber 308 through the flue gas inlet pipe 307, where it is cooled. Initially, when flue gas is introduced, through-hole 604 is far from through-hole 602, and the cooling chamber and the flue gas release chamber are not connected (i.e., the passage between the cooling chamber and the flue gas release chamber is cut off). As flue gas continuously enters the cooling chamber 308, the pressure in the cooling chamber 308 gradually increases. Since the pressure sensing module is connected to the cooling chamber and can drive the drive mechanism according to the pressure change in the cooling chamber, the drive mechanism gradually actuates as the pressure in the cooling chamber 308 increases. The movable plate 603 moves, bringing the second through hole 604 closer to the first through hole 602 until they intersect. This connects the cooling chamber and the flue gas release chamber via the intersection of the second through hole 604 and the first through hole 602. The flue gas in the cooling chamber 308 flows through the second through hole 604 and the first through hole 602 into the flue gas release chamber 310, and then flows into the desulfurization tower body 1 through the flue gas outlet pipe 302 for desulfurization. As the flue gas in the cooling chamber 308 continuously flows into the flue gas release chamber 310, the gas pressure in the cooling chamber 308 decreases. At this point, the pressure sensing module drives the movable plate 603 to move back, moving the second through hole 604 away from the first through hole 602 until they are separated. This cuts off the passage between the cooling chamber and the flue gas release chamber. By repeating the above process, the air cooling device 3 in this embodiment can achieve automatic continuous cooling of the flue gas. Furthermore, during the cooling process, the residence time of the flue gas in the cooling chamber 308 is increased, ensuring the cooling effect of the flue gas.In this embodiment, the movable plate 603 and the first mounting plate 601 can move horizontally relative to each other, vertically relative to each other, or in any other direction relative to each other. As long as it is ensured that "when the air pressure in the cooling chamber increases, the driving mechanism can drive the movable plate 603 to move, so that the second through hole 604 approaches the first through hole 602 until they intersect, thereby connecting the cooling chamber and the flue gas release chamber; when the air pressure in the cooling chamber decreases, the driving mechanism can drive the movable plate 603 to move, so that the second through hole 604 moves away from the first through hole 602 until they are separated, thereby cutting off the passage between the cooling chamber and the flue gas release chamber", the present invention does not make specific limitations.

[0032] As a preferred embodiment of the above-described embodiments of the present invention, see [link to previous document]. Figures 2-4 In this embodiment, the pressure sensing module can adopt the following structure, specifically including a piston chamber disposed in the cooling box 301. One end of the inner cavity of the piston chamber is connected to the cooling chamber and a sealing plate 306 is provided for sealing and sliding. This end of the inner cavity of the piston chamber is sealed by the sealing plate 306, and the other end of the inner cavity of the piston chamber is blocked or connected to the atmosphere. The driving mechanism is coupled to the sealing plate 306. In this embodiment, when the sealing plate 306 slides along the piston chamber, the sealing plate 306 can drive the driving mechanism to move, thereby causing the movable plate 603 to move. A restoration device is connected to the sealing plate 306. The restoration device has the tendency to drive the sealing plate 306 to move, thereby causing the cooling chamber and the flue gas release chamber to change from a connected state to a closed state. In other words, when the cooling chamber and the flue gas release chamber change from a cut-off state to a connected state, the driving force of the sealing plate 306 comes from the air pressure in the cooling chamber 308; and when the cooling chamber and the flue gas release chamber change from a connected state to a cut-off state, the driving force of the sealing plate 306 comes from the restoration device.

[0033] As an optional implementation of the above embodiments of the present invention, see Figure 3 and Figure 4 In this embodiment, both the movable plate 603 and the first mounting plate 601 are vertically arranged. The movable plate 603 can move up and down. The driving mechanism includes a fixed rod 605 fixed to the bottom of the movable plate 603 and a first pressing block 305 connected to the sealing plate 306. The fixed rod 605 is vertically arranged and passes through the piston chamber wall vertically and is slidably connected to the piston chamber wall. The first pressing block 305 is provided with an inclined surface 3051. The lower end of the fixed rod 605 contacts the inclined surface 3051. When the sealing plate 306 moves, the lower end of the fixed rod 605 slides along the inclined surface 3051. The working principle of this embodiment is as follows (using...). Figure 3Taking the orientation shown in u4 as an example (the right side of the sealing plate 306 is the cooling chamber 308, and the left side of the sealing plate 306 is the piston chamber): When the gas pressure in the cooling chamber 308 increases, the gas in the cooling chamber 308 will push the sealing plate 306 to move to the left along the piston chamber. During the leftward movement of the sealing plate 306, the first pressing block 305 moves together with the sealing plate 306. The first pressing block 305 drives the fixed rod 605 to rise upward through the inclined surface 3051. When the fixed rod 605 rises, it drives the movable plate 603 to move upward. See [reference needed] Figure 4 When the movable plate 603 moves upward, the second through hole 604 on the movable plate 603 moves upward and gradually moves in the horizontal direction ( Figure 4 The through hole 602 on the first mounting plate 601 intersects with the through hole 602 on the left-right direction (as shown), at which time the passage between the cooling chamber and the flue gas release chamber is opened; when the gas pressure in the cooling chamber 308 decreases, the restoration device drives the sealing plate 306 to move to the right along the piston chamber, at which time the fixed rod 605 moves down along the inclined surface 3051, and the through hole 604 on the movable plate 603 moves down and gradually moves in the horizontal direction (as shown in the left-right direction). Figure 4 The through hole 602 on the first mounting plate 601 is aligned with the through hole 602 on the left and right sides (as shown in the diagram) until they are separated (i.e., do not intersect), at which point the passage between the cooling chamber and the flue gas release chamber is cut off.

[0034] As a preferred embodiment of the above-described embodiments of the present invention, see [link to previous document]. Figure 3 In this embodiment, the lower end of the fixing rod 605 is provided with an arc-shaped block 606, the arc surface of which convexes outward and contacts the inclined surface 3051. The arc-shaped block 606 can reduce the friction between the fixing rod 605 and the inclined surface 3051, thereby improving the flexibility of the fixing rod 605 when sliding on the inclined surface 3051.

[0035] As a preferred embodiment of the above-described embodiments of the present invention, see [link to previous document]. Figure 2 and Figure 3 In this embodiment, the recovery device can be a helical spring 304, with one end of the helical spring 304 fixed and the other end connected to the sealing plate 306. Furthermore, the helical spring 304 is placed in the piston chamber to prevent corrosion by flue gas.

[0036] As a preferred embodiment of the above-described embodiments of the present invention, see [link to previous document]. Figure 3 and Figure 4The first mounting plate 601 is provided with a guide groove 607 for guiding the movable plate 603. The movable plate 603 is connected to the guide groove 607. The guide groove 607 provides guidance for the movable plate 603 (such as allowing the movable plate 603 to move only up and down), and also limits the distance between the movable plate 603 and the first mounting plate 601 (i.e. the movable plate 603 and the first mounting plate 601 are in contact). At this time, the movable plate 603 and the first mounting plate 601 can slide relative to each other, but as little gap as possible, so as to ensure the sealing of the flue gas between the cooling chamber 308 and the flue gas release chamber.

[0037] As a preferred embodiment of the above-described embodiments of the present invention, see [link to previous document]. Figure 1 and Figure 2 In this embodiment, the cooling chamber is provided with a water-cooled pipe 404, which penetrates the cooling chamber in the cooling box 301. The cooling medium in the water-cooled pipe 404 can absorb heat and cool down the flue gas in the cooling chamber.

[0038] As a preferred embodiment of the above-described embodiments of the present invention, see [link to previous document]. Figure 1 , Figure 2 and Figure 5 In this embodiment, the flue gas dust removal device 2 can adopt the following structure, specifically including a dust removal box 201, a cylindrical cavity 208 provided in the dust removal box 201, a rotating component 205 coaxially rotatably connected in the cylindrical cavity 208, a plurality of scrapers 203 evenly provided axially on the rotating component 205, the inner end of the scraper 203 connected to the rotating component 205, and the outer end of the scraper 203 extending to the side wall of the cylindrical cavity 208; the dimension of the scraper 203 along the axial direction of the rotating component 205 is not greater than the height of the cylindrical cavity 208; a flue gas outlet pipe 302 is connected to the dust removal box 201 and communicates with the cylindrical cavity 208, the end of the flue gas outlet pipe 302 connected to the dust removal box 201 is inclined upwards, see [reference]. Figure 5 The purpose of this arrangement is that after the flue gas outlet pipe 302 blows into the cylindrical cavity 208, the airflow direction is always towards the dust removal device outlet 207. In this way, the flue gas will drive the rotating part 205 and the scraper 203 to form a rotor structure that rotates counterclockwise (e.g., Figure 5 (As shown in the orientation) rotates, so that the flue gas is directly filtered by the arc-shaped filter 202 and then discharged through the flue gas outlet pipe 302, avoiding the flue gas driving the rotating part 205 and scraper 203 to form a rotor structure clockwise (as shown in the orientation). Figure 5When the rotor rotates clockwise (as shown in the diagram), it first reaches the particulate collection chamber 209, causing the collected particles to be blown up by the flue gas and then reach the arc-shaped filter 202, thus preventing the arc-shaped filter 202 from being blocked by these larger particles (because these particles are filtered out by the arc-shaped filter 202). The dust collector 201 has a dust removal device outlet 207 at the top of the cylindrical cavity 208, and an arc-shaped filter 202 is provided at the dust removal device outlet 207 at the top of the cylindrical cavity 208. When the rotating part 205 rotates, the outer end of the scraper 203 can contact the arc-shaped filter 202. In this way, during the rotation of the rotor, the scraper will continuously scrape the arc-shaped filter 202, preventing the arc-shaped filter 202 from being blocked by smoke and dust. The dust collector 201 has a particulate collection chamber 209 at the bottom of the cylindrical cavity 208. The working principle of the flue gas dust removal device 2 in this embodiment is as follows (using...). Figure 5 (Taking the orientation shown as an example): After being cooled by the cooling chamber 308, the flue gas enters the cylindrical cavity 208 through the flue gas outlet pipe 302. When the flue gas enters the cylindrical cavity 208, the flue gas blows the scraper, causing the rotating part 205 to rotate counterclockwise. The flue gas also flows counterclockwise from the flue gas outlet pipe 302 to the dust removal device outlet 207 in the cylindrical cavity 208. When the flue gas flows through the dust removal device outlet 207, the dust in the flue gas is blocked by the arc-shaped filter screen 202. During the rotation of the scraper, the outer edge of the scraper scrapes off the dust blocked on the arc-shaped filter screen 202. As the scraper rotates counterclockwise, when it reaches the bottom of the cylindrical cavity 208, it falls into the particulate matter collection chamber 209 and is collected.

[0039] As a preferred embodiment of the above-described embodiments of the present invention, see [link to previous document]. Figure 5 In this embodiment, a pull-out box 206 for collecting particulate matter can be provided in the particulate matter collection chamber 209, and a side opening 210 is provided on the wall of the dust collection box 201 for inserting and pulling out the pull-out box 206 from the particulate matter collection chamber 209. The pull-out box 206 can be pulled out periodically to clean the collected dust.

[0040] As a preferred embodiment of the above-described embodiments of the present invention, see [link to previous document]. Figure 6In this embodiment, the desulfurization component 5 can adopt the following structure, specifically including a frame (not shown), with at least two layers of filter plates 507 spaced apart in the middle of the frame, and limestone filling the spaces between adjacent filter plates 507; the desulfurization tower body 1 includes a desulfurization tower 101, with support legs 103 at the bottom of the desulfurization tower 101 for support, and a groove for inserting the desulfurization component 5 into the desulfurization tower 101. The desulfurization component 5 is inserted into the groove, and a side opening is provided on the side wall of the desulfurization tower 101 for inserting the desulfurization component 5 into the groove. A baffle (not shown) for sealing the side opening is detachably connected to the desulfurization tower 101 at the side opening. When replacing the desulfurization component 5, the baffle is removed, the entire desulfurization component 5 is pulled out of the groove, a new desulfurization component 5 is inserted into the groove, and then the baffle is reinstalled. Therefore, this embodiment allows for quick replacement of the desulfurization component 5.

[0041] In the above embodiments of the present invention, a second mounting plate 303 is horizontally provided on the left side of the inner cavity of the cooling box 301. The lower surface of the second mounting plate 303, the left side of the cooling box 301, the front side of the cooling box 301, and the rear side of the cooling box 301 form the piston chamber. A sealing plate 306 is disposed at the right end of the piston chamber, ensuring that the sealing plate 306 is always within the piston chamber. A coil spring 304 is disposed within the piston chamber. See also Figure 2 The inner cavity of the cooling box 301 is connected to the upper part of the right end of the second mounting plate 303 by the first mounting plate 601. The lower end face of the first mounting plate 601 is sealed to the upper surface of the second mounting plate 303, the upper end face of the first mounting plate 601 is sealed to the top wall of the cooling box 301, the front side of the first mounting plate 601 is sealed to the front side of the cooling box 301, and the rear side of the first mounting plate 601 is sealed to the rear side of the cooling box 301. At this time, the first mounting plate 601, the upper surface of the second mounting plate 303, the first mounting plate 601, the left side of the cooling box 301, the front side of the cooling box 301, and the rear side of the cooling box 301 form the flue gas release chamber 310. The chamber located to the right of the first mounting plate 601 and the sealing plate 306 in the cooling box 301 serves as the cooling chamber 308.

[0042] Example Please see Figures 1-6 The flue gas desulfurization and dust removal device of this invention includes a desulfurization tower body 1 and a flue gas cooling device 3. A dust removal device 2 is provided at the lower end of the desulfurization tower body 1. The desulfurization tower body 1 is connected to the flue gas cooling device 3 through the dust removal device 2. The dust removal device 2 is used to remove dust and filter the flue gas. A water cooling device is provided on one side of the flue gas cooling device 3. The water cooling device adopts a water cooling pipe 404 and is used to cool the flue gas. Specifically, the relative position between the first mounting plate and the movable plate 603 can control the disconnection and connection between the flue gas cooling device 3 and the dust removal device 2, thereby extending the cooling time of the flue gas by the flue gas cooling device 3. The desulfurization component 5 is inserted into the desulfurization tower body 1 and is used to desulfurize the flue gas.

[0043] Please see Figure 1 The desulfurization tower body 1 includes a desulfurization tower 101, and a support leg 103 is fixedly connected to the lower part of the desulfurization tower 101. The right side of the desulfurization tower 101 (see...) Figure 2 The desulfurization tower 101 is equipped with an observation window 102 for observing the desulfurization process. A dust removal device 2 is fixedly connected to the bottom of the desulfurization tower 101, and the desulfurization tower 101 is connected to the dust removal device 2. Several desulfurization components 5 are arranged at intervals along the height direction of the desulfurization tower 101.

[0044] Please see Figure 5 The dust removal device 2 includes a dust removal box 201, which is fixedly connected to the desulfurization tower 101 and connected to the flue gas cooling device 3. An arc-shaped filter screen 202 is installed at the top of the cylindrical cavity 208 inside the dust removal box 201 at the outlet of the dust removal device. The arc-shaped filter screen 202 is used for dust removal and filtration of the flue gas. A rotating shaft 204 is rotatably connected to the dust removal box 201. The rotating shaft 204 is horizontally arranged and coaxial with the cylindrical cavity 208. A rotating component 205 is fixedly connected to the cylindrical surface of the rotating shaft 204. Several scrapers 203 are axially fixedly connected to 205. The scrapers 203 are used to scrape off the impurities adhering to the arc-shaped filter screen 202. The bottom of the dust collector 201 is provided with a particulate matter collection chamber 209. The particulate matter collection chamber 209 is provided with a pull-out box 206. When the flue gas enters the dust collector 201 from the cooling box 301 through the flue gas outlet pipe 302, the flue gas drives the rotating part 205 and the scrapers 203 to rotate. The scrapers 203 scrape off the particulate matter adhering to the arc-shaped filter screen 202 to avoid clogging the arc-shaped filter screen 202.

[0045] Please see Figure 6 The desulfurization component 5 includes a frame and at least two layers of filter plates 507 disposed in the frame. An interlayer is formed between two adjacent filter plates 507. At the same time, the desulfurization tower 101 is provided with multiple desulfurization components 5. Limestone is placed between two adjacent filter plates 507 to form an interlayer. When the flue gas passes through the filter plates 507 and the limestone, the flue gas can be desulfurized.

[0046] Please see Figures 1-3The flue gas cooling device 3 includes a cooling box 301. A flue gas outlet pipe 302 is fixedly connected to the top left side of the cooling box 301. The cooling box 301 is connected to the dust collector box 201 through the flue gas outlet pipe 302. An air inlet pipe 307 is provided at the right end of the cooling box 301. A second mounting plate 303 is fixedly connected to the inner cavity of the cooling box 301. A sealing plate 306 is slidably connected to the lower cavity (i.e., piston chamber) of the second mounting plate 303 inside the cooling box 301. The sealing plate 306, the mounting plate 303, and the cooling box 301 form a sealed cavity. A spring 304 is fixedly connected to the left side of the sealing plate 306. One end of the spring 304 can be fixedly connected to the cooling box 301. A first pressing block 305 is fixedly connected to the left side of the sealing plate 306. The first pressing block 305 cooperates with the automatic control device.

[0047] Please see Figure 2 and Figure 4 The automatic control device includes a first mounting plate 601, which is fixedly connected to a second mounting plate 303. The first mounting plate 601 has several through holes 602. A movable plate 603 is located on the left side of the first mounting plate 601, and the movable plate 603 slides parallel to the first mounting plate 601. The movable plate 603 has several through holes 604, which cooperate with the through holes 602. A fixing rod 605 is fixedly connected to the bottom of the first mounting plate 601 for fixation. Rod 605 penetrates mounting plate 303 and slides and is sealed to mounting plate 303. An arc-shaped block 606 is fixedly connected to the lower end of rod 605. The arc-shaped block 606 contacts the inclined surface on the first pressing block 305. Movable plate 603, under the action of gravity, disconnects through hole two 604 and connects with through hole one 602, which can extend the time for water cooling of flue gas and prevent excessively high flue gas temperature from causing deformation of the arc-shaped filter screen 202, affecting the service life of the dust removal device 2. As the flue gas enters the cooling box 301... As the internal air pressure of the cooling chamber 301 gradually increases, the air pressure pushes the sealing plate 306 to move. The sealing plate 306 then moves the first pressing block 305 to the left. The first pressing block 305 pushes the arc-shaped block 606 to rise. That is, the arc-shaped block 606 drives the movable plate 603 to rise through the fixed rod 605, thereby controlling the connection (intersection) between the second through hole 604 and the first through hole 602. As the second through hole 604 connects with the first through hole 602, the internal air pressure of the cooling chamber 301 decreases, and the sealing plate 306 is subjected to the elastic force of the helical spring 304. As the sealing plate 306 moves to the right, the first pressing block 305 moves to the right, the arc-shaped block 606 moves down along the inclined surface, and the movable plate 603 moves down under the action of gravity, which will disconnect the connection between the second through hole 604 and the first through hole 602 (that is, the second through hole 604 and the first through hole 602 are separated). That is, when the internal air pressure of the cooling box 301 is high and a certain value, the cooling box 301 is connected to the dust collector 201 through the flue gas outlet pipe 302. When the internal air pressure of the cooling box 301 is low and a certain value, the cooling box 301 is disconnected from the dust collector 201.

[0048] The working principle of this invention is as follows: Flue gas enters the cooling box 301 through the inlet pipe 307, where refrigerant is introduced into the water-cooling pipe 404 for water cooling. Simultaneously, the movable plate 603 moves downwards under gravity, disconnecting the second through-hole 604 from the first through-hole 602. This extends the water cooling time of the flue gas, preventing excessively high flue gas temperatures from causing deformation of the arc-shaped filter screen 202 and affecting the service life of the dust removal device 2. As the flue gas enters the cooling box 301, the interior of the cooling box 301... As the air pressure increases, it pushes the sealing plate 306 to the left, which in turn moves the first pressing block 305 to the left. When the first pressing block 305 moves, it pushes the arc-shaped block 606 upward. This arc-shaped block 606, through the fixed rod 605, causes the movable plate 603 to rise, thereby controlling the connection between the second through hole 604 and the first through hole 602. As the second through hole 604 connects with the first through hole 602, the air pressure inside the cooling box 301 decreases, and the sealing plate 306 is subjected to the elastic force of the spring 304. The sealing plate 306 drives the first pressing block 305 to move to the right. The movable plate 603, under the influence of gravity, disconnects the second through hole 604 from the first through hole 602. That is, when the internal air pressure of the cooling box 301 is high and reaches a certain value, the cooling box 301 is connected to the dust collector 201 through the connecting pipe 302. When the internal air pressure of the cooling box 301 is low and reaches a certain value, the cooling box 301 disconnects from the dust collector 201. This ensures that when the flue gas enters the dust collector 201 from the cooling box 301, the flue gas drives the rotating part 20. 5 and the scraper 203 rotate, scraping off the particles adhering to the arc-shaped filter screen 202 to avoid clogging the arc-shaped filter screen 202 and affecting the subsequent desulfurization of flue gas into the desulfurization tower 101. At the same time, the desulfurization tower 101 is equipped with multiple desulfurization components 5, and limestone is placed between two filter plates 507 to form a partition. When the flue gas passes through the filter plates 507 and limestone, the flue gas can be desulfurized. An observation window 102 is provided on one side of the desulfurization tower 101 for easy observation of the desulfurization situation.

[0049] Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0050] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A flue gas desulfurization and dust removal device, characterized in that, It includes a desulfurization tower body (1) and a flue gas cooling device (3). The flue gas cooling device (3) has a flue gas inlet pipe (307) and a flue gas outlet pipe (302). The flue gas outlet pipe (302) is connected to the flue gas inlet of the desulfurization tower body (1). A flue gas dust removal device (2) is provided on the flue gas outlet pipe (302). A desulfurization component (5) is detachably provided in the desulfurization tower body (1).

2. The flue gas desulfurization and dust removal device according to claim 1, characterized in that, The flue gas cooling device (3) includes a cooling box (301), which contains a cooling chamber, a pressure sensing module, and a flue gas release chamber. A flue gas inlet pipe (307) is connected to the cooling chamber, and a flue gas outlet pipe (302) is connected to the flue gas release chamber. The flue gas release chamber is connected to the cooling chamber. A first mounting plate (601) and a movable plate (603) are provided at the connection between the flue gas release chamber and the cooling chamber. The movable plate (603) is fitted to the first mounting plate (601). The first mounting plate (601) has a through hole one (602), and the movable plate (603) has a through hole two (604). The pressure sensing module... The movable plate (603) is connected to the driving mechanism. The pressure sensing module is connected to the cooling chamber and can drive the driving mechanism to operate according to the change of air pressure in the cooling chamber. When the air pressure in the cooling chamber increases, the driving mechanism can drive the movable plate (603) to move, so that the second through hole (604) approaches the first through hole (602) until they intersect, thereby connecting the cooling chamber and the flue gas release chamber. When the air pressure in the cooling chamber decreases, the driving mechanism can drive the movable plate (603) to move, so that the second through hole (604) moves away from the first through hole (602) until they are separated, thereby cutting off the passage between the cooling chamber and the flue gas release chamber.

3. The flue gas desulfurization and dust removal device according to claim 2, characterized in that, The pressure sensing module includes a piston chamber disposed in the cooling box (301). One end of the inner cavity of the piston chamber is connected to the cooling chamber and a sealing plate (306) is provided for sealing and sliding. The driving mechanism is coupled to the sealing plate (306). When the sealing plate (306) slides along the piston chamber, it can drive the driving mechanism to move, thereby moving the movable plate (603). A recovery device is connected to the sealing plate (306). The recovery device has the tendency to drive the sealing plate (306) to move, thereby causing the cooling chamber and the flue gas release chamber to change from a connected state to a closed state.

4. The flue gas desulfurization and dust removal device according to claim 3, characterized in that, Both the movable plate (603) and the first mounting plate (601) are vertically arranged. The movable plate (603) can move up and down. The driving mechanism includes a fixed rod (605) fixed to the bottom of the movable plate (603) and a first pressing block (305) connected to the sealing plate (306). The fixed rod (605) is vertically arranged. The first pressing block (305) is provided with an inclined surface (3051). The lower end of the fixed rod (605) is in contact with the inclined surface (3051). When the sealing plate (306) moves, the lower end of the fixed rod (605) slides along the inclined surface (3051).

5. The flue gas desulfurization and dust removal device according to claim 3, characterized in that, The recovery device uses a helical spring (304), one end of which is fixed and the other end of which is connected to the sealing plate (306).

6. The flue gas desulfurization and dust removal device according to claim 2, characterized in that, The cooling chamber is equipped with a water-cooling pipe (404), which penetrates the cooling chamber in the cooling box (301).

7. The flue gas desulfurization and dust removal device according to claim 1, characterized in that, The flue gas dust removal device (2) includes a dust collection box (201), a cylindrical cavity (208) is provided in the dust collection box (201), a rotating component (205) is coaxially rotatably connected in the cylindrical cavity (208), a plurality of scrapers (203) are evenly provided along the axial direction of the rotating component (205), the inner end of the scraper (203) is connected to the rotating component (205), and the outer end of the scraper (203) extends to the side wall of the cylindrical cavity (208); the dimension of the scraper (203) along the axial direction of the rotating component (205) is not greater than the height of the cylindrical cavity (208); the flue gas outlet pipe (302) is connected to the dust collection box. (201) Connected to and communicating with the cylindrical cavity (208), the end of the flue gas outlet pipe (302) connected to the dust collector (201) is inclined upward; the dust collector (201) is provided with a dust removal device outlet (207) at the top of the cylindrical cavity (208), and an arc-shaped filter screen (202) is provided at the dust removal device outlet (207) at the top of the cylindrical cavity (208). When the rotating part (205) rotates, the outer end of the scraper (203) can contact the arc-shaped filter screen (202); the dust collector (201) is provided with a particulate matter collection chamber (209) at the bottom of the cylindrical cavity (208).

8. The flue gas desulfurization and dust removal device according to claim 7, characterized in that, The particulate matter collection chamber (209) is provided with a pull-out box (206) for collecting particulate matter, and the wall of the dust collector (201) is provided with a side opening (210) for inserting and pulling out the pull-out box (206) into the particulate matter collection chamber (209).

9. The flue gas desulfurization and dust removal device according to claim 1, characterized in that, The desulfurization component (5) includes a frame, at least two layers of filter plates (507) are provided in the middle of the frame, and limestone is filled between adjacent filter plates (507); The main body (1) of the desulfurization tower includes a desulfurization tower (101). The bottom of the desulfurization tower (101) is provided with a support leg (103) for supporting it. The desulfurization tower (101) is provided with a groove for inserting the desulfurization component (5). The desulfurization component (5) is inserted into the groove. The side wall of the desulfurization tower (101) is provided with a side opening for inserting the desulfurization component (5) into the groove. The desulfurization tower (101) is detachably connected with a baffle for sealing the side opening at the side opening.

10. A method for flue gas desulfurization and dust removal, characterized in that, The flue gas desulfurization and dust removal device according to any one of claims 1-9 is characterized by comprising the following processes: Flue gas enters the flue gas cooling device (3) through the flue gas inlet pipe (307). The flue gas is cooled by the flue gas cooling device (3). The cooled flue gas flows out of the flue gas cooling device (3) through the flue gas outlet pipe (302). When the flue gas flows along the flue gas outlet pipe (302), the flue gas dust removal device (2) filters the particulate matter in the flue gas. The flue gas filtered by the flue gas dust removal device (2) enters the desulfurization tower body (1) and rises. During the rise of the flue gas in the desulfurization tower body (1), the flue gas flows through the desulfurization component (5). The desulfurization of the flue gas is carried out by the desulfurization component (5). When the desulfurization component (5) needs to be replaced, the desulfurization component (5) can be disassembled and replaced.

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