Waste acid recycling device for waste gas desulfurization and denitrification

Abstract

The invention discloses a waste acid recycling device for waste gas desulfurization and denitrification, and relates to the field of waste gas treatment, the waste acid recycling device comprises a gas inlet pipe, a gas-liquid separator, a filter box and an internal waste gas treatment mechanism, the gas inlet pipe is connected with a gas inlet of the gas-liquid separator, and a gas outlet of the gas-liquid separator is connected with a gas inlet of the filter box through a pipeline; the treatment mechanism is composed of two filter assemblies, two scraping assemblies and a cleaning assembly, the filter assemblies are used for filtering impurities in waste gas and reducing the temperature, each filter assembly comprises a frame and a filter screen, an n-shaped channel is formed in a frame body of each frame, the scraping assemblies are used for cleaning the channels, and the cleaning assemblies are used for cleaning the channels. The cleaning assembly is used for cleaning impurities on the surfaces of the frame and the filter screen. According to the waste gas treatment device, large-particle impurities and dropping liquid in waste gas can be separated in advance, the follow-up filtering burden is effectively reduced, and the high-temperature waste gas is cooled in the filtering process.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of waste gas treatment, and specifically relates to a waste acid recovery and utilization device for waste gas desulfurization and denitrification. Background Art

[0002] In the fields of thermal power generation, iron and steel metallurgy, and chemical industry, sulfur- and nitrogen-containing waste gases will be generated. To avoid air pollution during waste gas emission, purification treatment needs to be carried out during the emission process. Among them, desulfurization and denitrification are two important tasks in waste gas treatment. During the desulfurization and denitrification process, a waste acid solution containing acid substances such as sulfuric acid and nitric acid will be generated. The waste acid is treated through processes such as filtration, distillation, concentration, and crystallization to remove impurities and moisture in it, improve the concentration and purity of the acid, so that it can be reused as an absorbent for desulfurization and denitrification or used in other industrial production processes.

[0003] A waste acid recovery and utilization device for waste gas desulfurization and denitrification described in the prior art includes an air inlet pipe, a filtration device, a gas-liquid mixing tank, an adsorber, a recovery tank, and a storage tank. The right end of the air inlet pipe is connected to the air inlet of the filtration device, the outlet end of the filtration device is connected to the inlet end of the cooling device through a pipeline, the outlet end of the cooling device is connected to the gas-liquid mixing tank through a microbubble device, the outlet end of the gas-liquid mixing tank is connected to the inlet end of the adsorber through a pipeline, and the outlet end of the adsorber is connected to the inlet end of the recovery tank through a pipeline.

[0004] Although the above technology can pass the acid solution into the recovery tank to react with the packing for purification, its structure is simple and the working efficiency is improved. However, the waste gas may contain large particulate impurities and droplets, which will increase the filtration burden and lead to a decrease in filtration efficiency. Moreover, the particulate matter in the high-temperature waste gas is prone to melting or adhering to the filter screen at high temperatures, resulting in filter screen blockage. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a waste acid recovery and utilization device for waste gas desulfurization and denitrification to solve the technical problems proposed in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A waste acid recovery and utilization device for waste gas desulfurization and denitrification, including an air inlet pipe, a gas-liquid separator, a filtration box, and an internal waste gas treatment mechanism. The air inlet pipe is connected to the air inlet of the gas-liquid separator, the air outlet of the gas-liquid separator is connected to the air inlet of the filtration box through a pipeline, the air outlet of the filtration box is connected to a cooling device through a pipeline, the top of the filtration box is installed with a sealing plate by screws, the inner side walls of the filtration box are symmetrically welded with guiding blocks, and the two guiding blocks are closed by a telescopic plate. The top end of the filtration box is installed with a sealing plate by screws, and the upper surface of the sealing plate is installed with a protective shell by screws; The processing mechanism consists of two groups of filtering components, two groups of scraping components and a cleaning component. The filtering components are used to filter impurities in the waste gas and reduce the temperature. Each filtering component includes a frame and a filter net. An n-shaped channel is formed in the frame body of the frame. The scraping components are used to clean the channel, and the cleaning component is used to sweep impurities on the surfaces of the frame and the filter net.

[0007] Specifically, a circulating water tank is provided at the bottom of the filtering box. A cooler is provided at the bottom of the circulating water tank. The filter net is installed in the middle of the frame. A number of radiating fins are evenly arranged on both sides of the outer wall of the frame. A water supply pipe communicating with the channel is provided at the center of the top of the frame. The other end of the water supply pipe penetrates through the sealing plate and the side wall of the protective shell and is connected to the inside of the circulating water tank. At the bottom of both sides of the outer wall of the frame at the channel, water outlet pipes are connected. The other ends of the two water outlet pipes both penetrate through the filtering box and are connected to the inside of the circulating water tank.

[0008] Specifically, a filter plate is installed inside the circulating water tank. Each water outlet pipe is located above the filter plate. A water pump is installed at the center of the inner bottom of the circulating water tank by screws. The water supply pipe is connected to the output port of the water pump.

[0009] Specifically, each group of scraping components includes vertical rods located on both sides of the channel. The bottom ends of the two vertical rods are rotatably connected to the inner bottom wall of the channel. The top ends of the two vertical rods both penetrate through the top wall of the frame and the sealing plate and are welded with shaft rods. Transmission wheels are fixedly sleeved on the outer walls of the two shaft rods. The two transmission wheels are connected by a transmission chain. A driving motor is provided at the top end of one of the shaft rods. The output end of the driving motor is flange-connected to the shaft rod.

[0010] Specifically, scraping plates are welded on the outer walls of the two vertical rods. The outer walls of the two scraping plates are in contact with and slidably connected to the inner wall of the channel. The diameter of each transmission wheel is larger than the diameter of the water supply pipe provided in the filtering component. The top end of the driving motor is fixedly connected to the inner top wall of the protective shell by screws.

[0011] Specifically, the cleaning component includes a fixed motor, three rope winding rollers, two driven sprockets and a driving sprocket. The three rope winding rollers are evenly arranged inside the protective shell. The output end of the fixed motor is flange-connected to the end of the middle rope winding roller. The ends of the three rope winding rollers are all rotatably connected to the inner wall of the protective shell through connecting shafts. Pulling ropes are wound on the three rope winding rollers. The other ends of the three pulling ropes all penetrate through the sealing plate and are connected to a moving plate. The outer walls of both ends of the three moving plates are in contact with the inner wall of the filtering box.

[0012] Specifically, in this technical solution, the two driven sprockets are symmetrically arranged, the driving sprocket is located between the two driven sprockets, the two driven sprockets and the driving sprocket are respectively fixedly sleeved on the connecting shafts of the three rope winding rollers, the driving sprocket and the two driven sprockets are connected by chain drive, the diameter of the driving sprocket is larger than the diameters of the two driven sprockets, and cleaning brushes are fixedly mounted on one side of the three moving plates close to the frame and the filter screen.

[0013] Specifically, in this technical solution, the base of the fixed motor is fixedly connected to the sealing plate by screws, and telescopic rods are fixedly mounted by screws on the upper surface of the sealing plate below the connecting shaft. The telescopic ends of each telescopic rod penetrate through the sealing plate and are respectively fixedly connected to both ends of the upper surface of the moving plate.

[0014] Specifically, in this technical solution, electric telescopic cylinders are mounted on both inner walls of the filter box by screws. The two electric telescopic cylinders are located below the guiding blocks. The telescopic ends of the two electric telescopic cylinders are both fixedly connected with connecting plates. The two telescopic plates are respectively embedded in the guiding blocks. The tops of the two connecting plates are respectively fixedly connected to the lower surfaces of the telescopic ends of the telescopic plates. The telescopic ends of the two telescopic plates are in close contact through sealing gaskets.

[0015] Specifically, in this technical solution, a dust collection box is provided at the inner bottom of the filter box below the two electric telescopic cylinders. The outer walls on both sides of the dust collection box are slidably connected to the inner wall of the filter box. The end faces of the dust collection box penetrate through the box wall of the filter box and are fixedly connected with baffles.

[0016] In summary, the present invention mainly has the following beneficial effects: Through the gas-liquid separator, this application can separate large particulate impurities and dripping liquid in the waste gas in advance, effectively reducing the burden of subsequent filtration. The separated gas enters the filter box through a pipeline. The particulate matter is filtered out through the filter screen. At the same time, the water pump works to send the water in the circulating water tank into the channel in the frame through the water supply pipe, flow and return to the circulating water tank again through the water outlet pipe. Under the action of the heat dissipation fins, the contact area with the waste gas is increased to increase the heat exchange area and improve the heat transfer efficiency, and a certain temperature reduction treatment is carried out on the passing high-temperature waste gas, thereby reducing the melting or adhesion of particulate matter at high temperature on the filter screen and slowing down the blockage of the filter screen. The filtered waste gas enters the subsequent desulfurization and denitrification equipment through a pipeline for the recycling of waste acid. Therefore, this application can separate large particulate impurities and dripping liquid in the waste gas in advance, effectively reducing the burden of subsequent filtration, and carry out temperature reduction treatment on the high-temperature waste gas during the filtration process; After being used for a period of time, the drive motor of the scraping component, the fixed motor of the cleaning component, and the electric telescopic cylinder work simultaneously. The output end of the drive motor drives the connected shaft rod to rotate. This shaft rod controls another shaft rod to rotate following it through a transmission wheel and a transmission chain, causing the vertical rod to rotate simultaneously. The rotating vertical rod drives the scraper to rotate to scrape the scale attached to the inner wall of the channel. The scraped scale follows the water flow and enters the circulation water tank through the water outlet pipe and is filtered by the filter plate to ensure the cleanliness of the water. The output end of the fixed motor drives the connected rope winding roller to rotate. The rotation of this rope winding roller drives the active sprocket to rotate through the connecting shaft. Under the action of the chain, it controls the rotation of the other two driven sprockets, thereby realizing the simultaneous rotation of the three rope winding rollers to loosen the pulling rope. Under the gravity of the moving plate, it moves downward and uses the cleaning brush to clean the particles attached to the frame, heat dissipation fins, and filter net. At this time, the telescopic end of the electric telescopic cylinder drives the telescopic plate to contract through the connecting plate, and the swept particles fall into the dust collection box for collection. Description of the Drawings

[0017] Figure 1 Schematic diagram of the filtering device of the present invention; Figure 2 Front view of the filtering device of the present invention; Figure 3 Exploded view of the filter box of the present invention; Figure 4 Of the present invention Figure 3 Front view; Figure 5 Structural diagram of the guiding block of the present invention; Figure 6 Structural diagram of the processing mechanism of the present invention; Figure 7 Structural diagram of the cleaning component of the present invention; Figure 8 Structural diagram of the filtering component and the scraping component of the present invention.

[0018] Marking description: 1. Intake pipe; 2. Gas-liquid separator; 3. Filter box; 301. Sealing plate; 302. Protective shell; 303. Dust collection box; 3031. Baffle; 304. Circulating water tank; 3041. Filter plate; 3042. Water pump; 4. Guide block; 401. Telescopic plate; 402. Connecting plate; 403. Electric telescopic cylinder; 5. Treatment mechanism; 6. Filter assembly; 601. Frame; 602. Channel; 603. Heat dissipation fins; 604. Filter net; 605. Water supply pipe; 606. Water outlet pipe; 7. Scraping assembly; 701. Vertical rod; 702. Scraper; 703. Shaft rod; 704. Driving wheel; 7041. Driving chain; 705. Driving motor; 8. Cleaning assembly; 801. Fixed motor; 802. Rope winding roller; 8021. Pulling rope; 803. Telescopic rod; 804. Connecting shaft; 805. Driving sprocket; 806. Driven sprocket; 807. Chain; 808. Moving plate; 8081. Cleaning brush. Detailed implementation manner

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0020] Next, according to the overall structure of the present invention, its embodiments will be described. Embodiment

[0021] All electrical components in this application are controlled by an external controller, and the cooling device is sequentially connected with a microbubble device, a gas-liquid mixing tank, an adsorber, an acid-resistant pump, a recovery tank, and a storage tank through pipelines. The specific connection form adopts the connection form of application number CN201921494092.8.

[0022] Please refer to Figure 1-8 As shown, a waste acid recovery and utilization device for waste gas desulfurization and denitrification includes an intake pipe 1, a gas-liquid separator 2, a filter box 3, and a treatment mechanism 5 for treating waste gas inside. The intake pipe 1 is connected to the intake port of the gas-liquid separator 2, the outlet of the gas-liquid separator 2 is connected to the intake port of the filter box 3 through a pipeline, the outlet of the filter box 3 is connected to a cooling device through a pipeline, the top of the filter box 3 is installed with a sealing plate 301 by screws, and guide blocks 4 are symmetrically welded on the inner side wall of the filter box 3. The two guide blocks 4 are closed by a telescopic plate 401. The top of the filter box 3 is installed with a sealing plate 301 by screws, and a protective shell 302 is installed on the upper surface of the sealing plate 301 by screws; The processing mechanism 5 is composed of two groups of filtering components 6, two groups of scraping components 7, and a cleaning component 8. The filtering component 6 is used to filter impurities in the waste gas and reduce the temperature. Each group of filtering components 6 includes a frame 601 and a filter mesh 604. An n-shaped channel 602 is formed in the frame body of the frame 601. The scraping component 7 is used to clean the channel 602, and the cleaning component 8 is used to sweep impurities on the surfaces of the frame 601 and the filter mesh 604. A circulating water tank 304 is provided at the bottom of the filter box 3. A cooler is provided at the bottom of the circulating water tank 304. The filter mesh 604 is installed in the middle of the frame 601. A number of heat dissipation fins 603 are evenly provided on both sides of the outer wall of the frame 601. A water supply pipe 605 communicating with the channel 602 is provided at the center of the top of the frame 601. The other end of the water supply pipe 605 penetrates through the sealing plate 301 and the side wall of the protective shell 302 and is connected to the inside of the circulating water tank 304. Outlet pipes 606 are connected to both sides of the outer wall of the bottom of the frame 601 at the position of the channel 602. The other ends of the two outlet pipes 606 both penetrate through the filter box 3 and are connected to the inside of the circulating water tank 304. A filter plate 3041 is installed inside the circulating water tank 304. Each outlet pipe 606 is located above the filter plate 3041. A water pump 3042 is installed at the center of the inner bottom of the circulating water tank 304 by screws. The water supply pipe 605 is connected to the outlet of the water pump 3042.

[0023] Electric telescopic cylinders 403 are installed on both inner walls of the filter box 3 by screws. The two electric telescopic cylinders 403 are located below the guiding block 4. Connecting plates 402 are fixed to the telescopic ends of the two electric telescopic cylinders 403. The two telescopic plates 401 are respectively embedded in the guiding block 4. The top ends of the two connecting plates 402 are respectively fixed to the lower surfaces of the telescopic ends of the telescopic plates 401. The telescopic ends of the two telescopic plates 401 are in close contact through a sealing gasket. A dust collection box 303 is provided at the inner bottom of the filter box 3 below the two electric telescopic cylinders 403. The outer walls on both sides of the dust collection box 303 are slidably connected to the inner wall of the filter box 3. The end faces of the dust collection box 303 penetrate through the box wall of the filter box 3 and are fixed with baffle plates 3031.

[0024] When treating sulfur - containing and nitrogen - containing waste gases generated by thermal power generation, iron and steel metallurgy, and chemical industries, the waste gas is sent into the gas - liquid separator 2 through the inlet pipe 1 to separate large particles and droplets in advance. The separated waste gas enters the filter box 3 through a pipeline. The contained particles are filtered through two layers of filter meshes 604. At this time, the water pump 3042 in the circulation water tank 304 works, sending water through the water supply pipe 605 into the channel 602 in the frame 601. The water flows in the channel 602 and returns to the circulation water tank 304 from the water outlet pipe 606. The flowing water conducts heat exchange with the waste gas in contact with the frame 601. Under the action of a number of heat - dissipating fins 603, the contact area with the waste gas can be increased, and then the passing waste gas can be cooled to a certain extent. After the filtered waste gas enters the cooling device through a pipeline for cooling, it then enters the micro - bubble device, gas - liquid mixing box, adsorber, acid - resistant pump, recovery tank, and storage tank in sequence through pipelines, completing the waste acid recovery and utilization of waste gas desulfurization and denitrification; After the filter box 3 has been used for a period of time, when it is necessary to clean the inner wall of the channel 602 and the outer walls of the frame 601, heat - dissipating fins 603, and filter meshes 604, the scraping component 7, cleaning component 8, and electric telescopic cylinder 403 work. The actuator of the scraping component 7 (the scraper 702 in the text) rotates to scrape off the scale adhering to the inner wall of the channel 602. The scale enters the circulation water tank 304 from the water outlet pipe 606 along with the flow of water and is filtered out by the filter plate 3041. The actuator of the cleaning component 8 (the cleaning brush 8081 in the text) moves down to sweep off the particulate matter adhering to the outer walls of the frame 601, heat - dissipating fins 603, and filter meshes 604. At this time, the telescopic end of the electric telescopic cylinder 403 drives the telescopic plate 401 to contract through the connecting plate 402. Then, the swept - off particulate matter will fall into the dust collection box 303 for collection; Therefore, this application can separate large - particle impurities and droplets in the waste gas in advance, effectively reducing the burden of subsequent filtration. And during the filtration process, the high - temperature waste gas is cooled, reducing the melting or adhesion of particulate matter on the filter mesh 604 at high temperatures, slowing down the blockage of the filter mesh 604. At the same time, it can realize the cleaning of scale and particulate matter, ensuring the effects of heat exchange and filtration.

[0025] Please refer to Figure 6 and Figure 8As shown in the figure, each set of scraping components 7 includes vertical rods 701 located on both sides of the channel 602. The bottom ends of the two vertical rods 701 are rotatably connected to the inner bottom wall of the channel 602. The top ends of the two vertical rods 701 penetrate through the top wall of the frame 601 and the sealing plate 301 and are welded with a shaft rod 703. Fixed sleeves of transmission wheels 704 are sleeved on the outer walls of the two shaft rods 703. The two transmission wheels 704 are connected by a transmission chain 7041. A driving motor 705 is provided at the top end of one shaft rod 703. The output end of the driving motor 705 is flange-connected to the shaft rod 703. Scrapers 702 are welded on the outer walls of the two vertical rods 701. The outer walls of the two scrapers 702 are in contact with and slidably connected to the inner wall of the channel 602. The diameter of each transmission wheel 704 is larger than the diameter of the water supply pipe 605 provided in the filtering component 6. The top end of the driving motor 705 is fixedly connected to the inner top wall of the protective shell 302 by screws.

[0026] The output end of the driving motor 705 drives the connected shaft rod 703 to rotate. The shaft rod 703 drives the fixedly sleeved transmission wheel 704 to rotate. The transmission wheel 704 drives the other transmission wheel 704 to rotate through the transmission chain 7041, thereby controlling the other shaft rod 703 to rotate. The two shaft rods 703 rotate to drive the vertical rods 701 connected to the bottom ends to rotate. The rotating vertical rods 701 drive the scrapers 702 fixed to the outer walls to rotate. The rotating scrapers 702 scrape off the scale adhering to the inner wall of the channel 602, thereby preventing the channel 602 from being blocked and reducing the heat exchange treatment between water and high-temperature waste gas.

[0027] Please refer to Figure 6 and Figure 7As shown, the cleaning assembly 8 includes a fixed motor 801, three rope winding rollers 802, two driven sprockets 806 and a driving sprocket 805. The three rope winding rollers 802 are evenly arranged inside the protective shell 302. The output end of the fixed motor 801 is connected to the end of the rope winding roller 802 located in the middle through a flange. The ends of the three rope winding rollers 802 are rotatably connected to the inner wall of the protective shell 302 through a connecting shaft 804. The three rope winding rollers 802 are all wound with a pull rope 8021. The other ends of the three pull ropes 8021 penetrate the sealing plate 301 and are connected to a movable plate 808. The outer walls of both ends of the three movable plates 808 are evenly in contact with the inner wall of the filter box 3. The two driven sprockets 806 are symmetrically arranged. The driving sprocket 805 is located between the two driven sprockets. Between the sprockets 806, the two driven sprockets 806 and the driving sprocket 805 are respectively fixedly mounted on the connecting shafts 804 of the three rope winding rollers 802, the driving sprocket 805 and the two driven sprockets 806 are connected by a chain 807, the diameter of the driving sprocket 805 is larger than the diameter of the two driven sprockets 806, and the three movable plates 808 are fixed with cleaning brushes 8081 on one side close to the frame 601 and the filter screen 604, the base of the fixed motor 801 is fixedly connected to the sealing plate 301 by screws, the upper surface of the sealing plate 301 is located below the connecting shaft 804 and is fixed with telescopic rods 803 by screws, the telescopic ends of each telescopic rod 803 penetrate the sealing plate 301 and are respectively fixedly connected to the two ends of the upper surface of the movable plate 808.

[0028] The output end of the fixed motor 801 drives the connected rope winding roller 802 to rotate, and the rope winding roller 802 drives the connecting shaft 804 at the end to rotate, and the connecting shaft 804 drives the fixed active sprocket 805 to rotate, and the active sprocket 805 drives the driven sprockets 806 on both sides to rotate through the chain 807, and the two driven sprockets 806 respectively drive the penetrating connecting shaft 804 to rotate, thereby controlling the rope winding rollers 802 on both sides to rotate, so that the three rope winding rollers 802 rotate at the same time to unwind the wound pull rope 8021. At this time, under the gravity of the movable plate 808, the three movable plates 808 move downward and stretch the telescopic rod 803 in cooperation with the unwound pull rope 8021, and the moving three movable plates 808 respectively drive the cleaning brushes 8081 to clean the particles attached to the frame 601, the plurality of heat dissipation fins 603 and the filter screen 604, thereby ensuring the cooling and filtering effects.

[0029] The working principle of the present invention is: When treating sulfur- and nitrogen-containing waste gases generated by thermal power generation, iron and steel metallurgy, and chemical industries, the waste gas is sent into the gas-liquid separator 2 through the intake pipe 1 to separate large particles and droplets in advance. The separated waste gas enters the filter box 3 through a pipeline and is filtered by two layers of filter meshes 604 to remove the contained particles. At this time, the water pump 3042 in the circulation water tank 304 works, sending water into the channel 602 in the frame 601 through the water supply pipe 605. The water flows in the channel 602 and returns to the circulation water tank 304 through the water outlet pipe 606. The flowing water conducts heat exchange with the waste gas in contact with the frame 601. With the help of a number of heat dissipation fins 603, the contact area with the waste gas can be increased, thereby cooling the passing waste gas to a certain extent. After the filtered waste gas enters the cooling device through a pipeline for cooling, it then enters the microbubble device, gas-liquid mixing tank, adsorber, acid-resistant pump, recovery tank, and storage tank in sequence through pipelines, completing the waste acid recovery and utilization of waste gas desulfurization and denitrification; After the filter box 3 has been used for a period of time and it is necessary to clean the inner wall of the channel 602 and the outer walls of the frame 601, heat dissipation fins 603, and filter meshes 604, the scraping assembly 7, cleaning assembly 8, and electric telescopic cylinder 403 work. The drive motor 705 of the scraping assembly 7 works, and the output end of the drive motor 705 drives the connected shaft rod 703 to rotate. This shaft rod 703 drives the fixedly sleeved transmission wheel 704 to rotate. This transmission wheel 704 drives another transmission wheel 704 to rotate through the transmission chain 7041, thereby controlling another shaft rod 703 to rotate. The two shaft rods 703 rotate to drive the vertical rod 701 connected to the bottom end to rotate. The rotating vertical rod 701 drives the scraper 702 fixed to the outer wall to rotate. The rotating scraper 702 scrapes off the scale adhering to the inner wall of the channel 602. The scale enters the circulation water tank 304 through the water outlet pipe 606 along with the flow of water and is filtered out by the filter plate 3041; While the fixed motor 801 of the cleaning component 8 operates, the output end of the fixed motor 801 drives the connected rope winding roller 802 to rotate. The rope winding roller 802 then drives the connecting shaft 804 at its end to rotate, and the connecting shaft 804 drives the actively arranged sprocket 805 fixedly sleeved thereon to rotate. The actively arranged sprocket 805 drives the driven sprockets 806 on both sides to rotate through the chain 807. The two driven sprockets 806 respectively drive the penetrated connecting shafts 804 to rotate, thereby controlling the rotation of the rope winding rollers 802 on both sides, so that the three rope winding rollers 802 rotate simultaneously to unwind the wound pulling rope 8021. At this time, under the gravity of the moving plate 808 and in cooperation with the unwound pulling rope 8021, the three moving plates 808 move downward and stretch the telescopic rod 803. The three moving plates 808 in motion respectively drive the cleaning brushes 8081 to sweep off the particulate matters attached to the frame 601, several heat dissipation fins 603 and the filter net 604. Among them, the telescopic end of the electric telescopic cylinder 403 drives the telescopic plate 401 to contract through the connecting plate 402. At this time, the swept-off particulate matters will fall into the dust collection box 303 for collection.

[0030] Although the embodiments of the present invention have been shown and described, the specific embodiments are only explanations of the present invention and are not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations without creative contributions to the embodiments according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A waste acid recovery and utilization device for waste gas desulfurization and denitrification, comprising an air intake pipe (1), a gas-liquid separator (2), a filter box (3) and an internal waste gas treatment mechanism (5), characterized in that The air inlet pipe (1) is connected to the air inlet of the gas-liquid separator (2); the air outlet of the gas-liquid separator (2) is connected to the air inlet of the filter box (3) through a pipeline; the air outlet of the filter box (3) is connected to a cooling device through a pipeline; a sealing plate (301) is installed on the top of the filter box (3) by screws; guide blocks (4) are symmetrically welded to the inner side walls of the filter box (3); the two guide blocks (4) are closed by a telescopic plate (401); a sealing plate (301) is installed on the top of the filter box (3) by screws; and a protective shell (302) is installed on the upper surface of the sealing plate (301) by screws; The processing mechanism (5) is composed of two groups of filter components (6), two groups of scraper components (7) and a cleaning component (8). The filter components (6) are used to filter impurities in the exhaust gas and reduce the temperature. Each group of the filter components (6) comprises a frame (601) and a filter screen (604). An n-shaped channel (602) is provided in the frame body of the frame (601). The scraper components (7) are used to clean the channel (602). The cleaning component (8) is used to clean impurities from the surface of the frame (601) and the filter screen (604).

2. The waste acid recovery and utilization device for waste gas desulfurization and denitrification according to claim 1, characterized in that: A circulating water tank (304) is provided at the bottom of the filter box (3), a cooler is provided at the bottom of the circulating water tank (304), the filter screen (604) is installed in the middle of the frame (601), a plurality of heat dissipation fins (603) are evenly provided on both sides of the outer wall of the frame (601), a water supply pipe (605) connected to the channel (602) is provided at the top center of the frame (601), the other end of the water supply pipe (605) passes through the sealing plate (301) and the side wall of the protective shell (302) and is connected to the inside of the circulating water tank (304), and the bottom of the outer walls of both sides of the frame (601) are connected to water outlet pipes (606) at the channel (602), and the other ends of the two water outlet pipes (606) pass through the filter box (3) and are connected to the inside of the circulating water tank (304).

3. The waste acid recovery and utilization device for waste gas desulfurization and denitrification according to claim 2 is characterized in that: A filter plate (3041) is installed inside the circulating water tank (304), and each of the water outlet pipes (606) is located above the filter plate (3041). A water pump (3042) is installed at the center of the inner bottom of the circulating water tank (304) by means of screws, and the water supply pipe (605) is connected to the output port of the water pump (3042).

4. The waste acid recovery and utilization device for waste gas desulfurization and denitrification according to claim 1, characterized in that: Each group of the scraping components (7) comprises vertical rods (701) located on both sides of the channel (602), the bottom ends of the two vertical rods (701) are rotatably connected to the inner bottom wall of the channel (602), the top ends of the two vertical rods (701) penetrate the top wall of the frame (601) and the sealing plate (301) and are welded with shaft rods (703), the outer walls of the two shaft rods (703) are fixedly sleeved with transmission wheels (704), the two transmission wheels (704) are transmission-connected via a transmission chain (7041), and a driving motor (705) is provided at the top end of one of the shaft rods (703), and the output end of the driving motor (705) is flange-connected to the shaft rod (703).

5. The waste acid recovery and utilization device for waste gas desulfurization and denitrification according to claim 4, characterized in that: The outer walls of the two vertical rods (701) are welded with scrapers (702), the outer walls of the two scrapers (702) are in contact with the inner wall of the channel (602) and are slidably connected, the diameter of each transmission wheel (704) is larger than the diameter of the water supply pipe (605) provided in the filter assembly (6), and the top end of the drive motor (705) is fixedly connected to the inner top wall of the protective shell (302) by means of screws.

6. The waste acid recovery and utilization device for waste gas desulfurization and denitrification according to claim 1, characterized in that: The cleaning assembly (8) comprises a fixed motor (801), three rope winding rollers (802), two driven sprockets (806) and a driving sprocket (805); the three rope winding rollers (802) are evenly arranged inside the protective shell (302); the output end of the fixed motor (801) is connected to the end of the rope winding roller (802) located in the middle via a flange; the ends of the three rope winding rollers (802) are rotatably connected to the inner wall of the protective shell (302) via a connecting shaft (804); a pull rope (8021) is wound around the three rope winding rollers (802); the other ends of the three pull ropes (8021) pass through the sealing plate (301) and are connected to the movable plate (808); the outer walls of both ends of the three movable plates (808) are evenly in contact with the inner wall of the filter box (3).

7. The waste acid recovery and utilization device for waste gas desulfurization and denitrification according to claim 6, characterized in that: The two driven sprockets (806) are symmetrically arranged, the driving sprocket (805) is located between the two driven sprockets (806), the two driven sprockets (806) and the driving sprocket (805) are respectively fixedly sleeved on the connecting shafts (804) of the three rope winding rollers (802), the driving sprocket (805) and the two driven sprockets (806) are connected to each other by a chain (807), the diameter of the driving sprocket (805) is larger than the diameter of the two driven sprockets (806), and a cleaning brush (8081) is fixed on one side of the three movable plates (808) close to the frame (601) and the filter screen (604).

8. The waste acid recovery and utilization device for waste gas desulfurization and denitrification according to claim 7, characterized in that: The base of the fixed motor (801) is fixedly connected to the sealing plate (301) by means of screws, and a telescopic rod (803) is screwedly fixed to the upper surface of the sealing plate (301) below the connecting shaft (804), and the telescopic end of each telescopic rod (803) passes through the sealing plate (301) and is fixedly connected to two ends of the upper surface of the moving plate (808) respectively.

9. The waste acid recovery and utilization device for waste gas desulfurization and denitrification according to claim 1, characterized in that: Electric telescopic cylinders (403) are mounted on the inner walls of both sides of the filter box (3) by means of screws. The two electric telescopic cylinders (403) are located below the guide block (4). The telescopic ends of the two electric telescopic cylinders (403) are fixed with connecting plates (402). The two telescopic plates (401) are respectively embedded in the guide blocks (4). The top ends of the two connecting plates (402) are respectively fixedly connected to the lower surfaces of the telescopic ends of the telescopic plates (401). The telescopic ends of the two telescopic plates (401) are in close contact via sealing gaskets.

10. The waste acid recovery and utilization device for waste gas desulfurization and denitrification according to claim 9, characterized in that: A dust box (303) is provided at the inner bottom of the filter box (3) below the two electric telescopic cylinders (403); outer walls on both sides of the dust box (303) are slidably connected to the inner wall of the filter box (3); end faces of the dust box (303) penetrate the wall of the filter box (3) and are fixed with baffles (3031).

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