Rotary flue gas self-cleaning-based secondary aluminum ash calcination treatment equipment and method

Abstract

The application relates to the field of flue gas self-cleaning, in particular to a secondary aluminum ash calcination treatment equipment based on rotary flue gas self-cleaning, and a rotary flue gas self-cleaning method, which comprises a spraying box, a mounting frame is arranged longitudinally at the center of the inside of the spraying box, a first filter plate for filtering air is arranged in the inside of the mounting frame, a filtering device for filtering slurry is arranged at the bottom of the mounting frame close to the inside of the spraying box, a foreign matter discharging device for collecting deposits is arranged at the bottom of the spraying box close to one side of the mounting frame, a spiral conveying rod for discharging the deposits is rotationally arranged in the inside of the foreign matter discharging device, and a secondary purification device for removing tiny particles of the discharges is arranged at one side of the spraying box. The application solves the problems that water resources are wasted after the water body is mixed with dust and cannot be used again, and dust outside the air filter element is inconvenient to clean.

Description

Technical Field

[0001] This invention relates to the field of flue gas self-cleaning, specifically to a secondary aluminum ash calcination treatment device based on rotary flue gas self-cleaning, and also to a method based on rotary flue gas self-cleaning. Background Technology

[0002] Secondary aluminum ash calcination is an important method for treating aluminum smelting waste. It refers to the secondary combustion of aluminum ash generated during the primary smelting process at high temperatures to extract residual aluminum from the ash. This not only improves the aluminum recovery rate but also reduces the pollution of the environment by emissions. Secondary aluminum ash calcination is usually carried out in a rotary kiln.

[0003] Chinese patent application CN106178812A discloses an efficient and environmentally friendly process for treating dust and flue gas in recycled aluminum smelting. The steps are as follows: 1) A flue gas exhaust device is installed on the upper part of equipment such as the smelting furnace and aluminum ash roasting machine. Under the action of the downstream fan, the flue gas is separated by a cyclone dust collector, and the dust is returned to the smelting furnace for remelting. The flue gas enters a water film dust collector for further treatment of the dust in the flue gas. The completed flue gas enters the tail gas purification device; 2) A purification chamber is set in the tail gas purification device. The bottom of the purification chamber has an air inlet and the top has an air outlet. The air inlet is connected to the exhaust port of the water film dust collector, and the air outlet is directly connected to the chimney. Filter needle felts are arranged horizontally at intervals in the purification chamber. Dust adsorbent is impregnated on the filter needle felts. The fan is started to allow the gas to enter the purification chamber. The flue gas gradually passes through the polyester filter needle felts. The polyester filter needle felts filter and adsorb harmful elements in the tail gas. Finally, the gas is discharged from the outlet. The discharged tail gas is qualified gas.

[0004] While the aforementioned efficient and environmentally friendly dust and flue gas treatment process can remove harmful substances such as dust particles from emissions, and the scheme uses a combination of cyclone dust collectors and water film dust collectors to achieve dust removal, cyclone dust collectors typically only separate larger dust particles. Smaller dust particles need to be separated by water film dust collectors. However, when dust passes through the water film dust collector, the water mixes with the dust over a long period of time, causing a large amount of sludge to accumulate at the bottom of the water film, making cleaning extremely inconvenient. Furthermore, the water film dust collector requires spraying a large amount of water during operation, and the water cannot be reused after mixing with the dust, resulting in a waste of water resources. Summary of the Invention

[0005] To address the aforementioned issues, a secondary aluminum ash calcination treatment device and method based on rotary flue gas self-cleaning is provided. By installing an inclined filter device at the bottom of the spray box, the spray box is divided into a spray chamber and a storage chamber for purified water. The filter device filters the mud-water mixture generated during spraying, while the filtered water enters the storage chamber. Impurities from filtration are deposited in a discharge device. When a certain amount of impurities is accumulated, they are discharged by a rotating screw conveyor. Several air filters are evenly arranged longitudinally inside the secondary purification device, allowing for secondary filtration of fine particulate matter within the emissions. A soot-blowing pipe is installed at the center of the top of each air filter, intermittently spraying high-pressure gas. This solves the problems of water and dust mixing making the mixture unusable, resulting in water waste, and the inconvenience of cleaning dust from the outside of the air filters.

[0006] To address the problems of existing technologies, this invention provides a secondary aluminum ash calcination treatment device based on rotary flue gas self-cleaning, comprising a spray box. A mounting frame is longitudinally arranged at the center of the spray box. A first filter plate for filtering air is arranged inside the mounting frame. A filter device for filtering slurry is arranged at the bottom of the spray box near the mounting frame. A cleaning device capable of longitudinal movement to clean one side of the first filter plate and the filter device is arranged inside the spray chamber of the spray box. An air jet device capable of horizontal movement to clean the other side of the first filter plate and the filter device is movable inside the storage chamber of the spray box. A sediment removal device for collecting sediment is arranged at the bottom of the spray box, and a spiral conveyor rod for discharging sediment is rotatably arranged inside the sediment removal device. A secondary purification device for removing fine particles from the emissions is arranged on one side of the spray box. A plurality of air filter elements for filtering fine particles in the exhaust gas are evenly distributed at the center of the secondary purification device, and a plurality of dust-blowing pipes for removing dust from the surface of the air filter elements are evenly distributed at the top of the secondary purification device.

[0007] As one technical solution of the present invention, the bottom center of the spray box is provided with an installation groove for installing a filter device, and the top of the installation groove is provided with a limiting groove for restricting the filter device.

[0008] As a technical solution of the present invention, the bottom of the filter device is inclinedly provided with a second filter plate for filtering mud, and one end of the filter device is provided with a sealing plate for sealing installation. A handle is provided at the center of one side of the sealing plate to facilitate removing the filter device from the inside of the spray box. The top of the filter device is provided with a limiting block that can be adapted to the limiting groove.

[0009] As a technical solution of the present invention, a first air inlet that can communicate with the interior of the spray box is provided on one side of the spray box, and a box cover is provided on the top of the spray box, and an exhaust pipe for exhausting is provided above the storage chamber at one end of the box cover.

[0010] As a technical solution of the present invention, a water pump that can communicate with the storage chamber is provided at the bottom of the rear side of the spray box, and a water pipe extending into the spray chamber is provided at the output end of the water pump, and a number of spray nozzles for spraying water are provided outside the water pipe.

[0011] As a technical solution of the present invention, the output end of the impurity removal device is provided with a removable seal, and the end of the impurity removal device away from the output end is provided with a first rotary drive for driving the screw conveyor to rotate.

[0012] As a technical solution of the present invention, an installation plate is horizontally arranged on the inner side of the secondary purification device near the top, and multiple sets of air filter elements for purifying gas are evenly distributed on the installation plate.

[0013] As a technical solution of the present invention, a pressurized air storage device is symmetrically arranged at the lower rear side of the secondary purification device. The output end of the air storage device is provided with an air pipe that can extend into the interior of the secondary purification device. Multiple sets of downward-facing soot blowing pipes are symmetrically arranged on both sides of the air pipe, and the output ends of the soot blowing pipes are respectively located at the center of the top of the air filter element. An electromagnetic pulse valve for controlling the air jet is provided on the outside of the soot blowing pipe.

[0014] As a technical solution of the present invention, a second air inlet for air intake is provided at the bottom of one end of the secondary purification device, and an exhaust port for exhaust is provided at the top of the other end of the secondary purification device, and a second flue that can communicate with the first air inlet is installed at one end of the exhaust port.

[0015] As one technical solution of the present invention, a cyclone filter tower for purifying gas is provided on one side of the secondary purification device, and a first flue that can be connected to the output end of the cyclone filter tower is installed at one end of the second air inlet.

[0016] As a technical solution of the present invention, first sliding rods are symmetrically arranged on both sides of the spray chamber inside the spray box, and a second rotary drive is arranged at the center of the top of the spray box. A lead screw is rotatably arranged at the output end of the second rotary drive. A cleaning device is movably installed on the outside of the lead screw, and both ends of the cleaning device are movably installed outside the first sliding rods. A cleaning brush that can move horizontally is arranged on one side of the cleaning device. Several movable rods that are symmetrically installed inside the cleaning device are arranged on one side of the cleaning brush. A return spring is arranged on the outside of the movable rod near the cleaning brush so that the cleaning brush can clean the impurities on the surface of the first filter plate when it moves longitudinally.

[0017] As a technical solution of the present invention, a plurality of second slide rods are horizontally arranged inside the storage box of the spray box near the first filter plate. A movable frame is movably installed on the outside of the second slide rods. An air jet device for cleaning the first filter plate is provided on one side of the movable frame. Telescopic components for driving the movable frame to slide along the second slide rods are symmetrically arranged on one side of the storage chamber inside the spray box. A fan is provided at the bottom of the spray box. The output end of the fan is connected to the movable frame through a conveying pipe so that the air jet device can blow the impurities remaining on the outside of the first filter plate into the spray chamber.

[0018] This invention also provides a rotary flue gas self-cleaning method, comprising the following steps: S1. The fumes generated during the secondary aluminum ash calcination enter through the inlet of the cyclone filter tower. Inside the cyclone filter tower, larger dust particles are separated by centrifugal force and discharged through the discharge port at the bottom of the cyclone filter tower. At the same time, the fumes separated inside the cyclone filter tower enter the secondary purification device through the first flue. The air filter element inside the secondary purification device filters the fine particles in the fumes and then transports them to the spray box through the second flue. Finally, they are discharged through the exhaust pipe at the top of the spray box. S2. When the smoke and dust enter the spray box, it is first placed inside the spray chamber. Then, the water in the storage chamber is pumped out by the water pump and sprayed into the spray chamber through the spray head at one end of the water pipe, thereby filtering the harmful gases in the smoke and dust. At the same time, the spray can also repeatedly filter the small amount of dust remaining in the smoke and dust. The mud-water mixture generated during the repeated filtration of the smoke and dust in the spray chamber falls to the bottom and settles into the impurity discharge device. When it is necessary to clean the inside of the impurity discharge device, the seal at the output end of the impurity discharge device is opened, and then the first rotating drive component drives the screw conveyor to rotate and discharge the settled impurities. S3. By setting a filter device at the bottom of the first filter plate, the filter device filters the mud-water mixture generated during spraying, preventing the mud-water mixture from directly entering the storage chamber. Furthermore, by setting a longitudinally movable cleaning device inside the spray chamber, and the working end of the cleaning device being elastically connected to one side of the first filter plate and the filter device, the cleaning device can clean one side of the first filter plate and the filter device when it moves longitudinally. By setting a horizontally movable jetting device inside the storage chamber near the other side of the first filter plate and the filter device, the jetting device blows air onto the other side of the first filter plate and the filter device, preventing impurities from penetrating into the storage chamber when the cleaning device cleans the first filter plate and the filter device.

[0019] The advantages of this invention compared to the prior art are as follows: This application uses a secondary purification device with several air filter elements arranged longitudinally and evenly inside, allowing the air filter elements to perform secondary filtration of tiny particulate matter inside the exhaust. By setting a soot blowing pipe at the center of the top of the air filter element, the soot blowing pipe intermittently sprays high-pressure gas, achieving the cleaning of dust on the surface of the air filter element by the high-pressure gas sprayed by the soot blowing pipe. Furthermore, the filtration device and the first filter plate filter the mud-water mixture generated during spraying, solving the problems of water and dust mixing making it unusable and thus wasting water resources, as well as the inconvenience of cleaning dust from the outside of the air filter element. The problem is that the spray box simultaneously treats harmful substances in the exhaust gas. This is achieved by longitudinally fixing a mounting frame to the center of the spray box, then installing a first filter plate inside the mounting frame. A filter device for filtering sludge is installed near the bottom of the mounting frame inside the spray box. The mounting frame and filter device work together to divide the interior of the spray box into a spray chamber and a storage chamber for purified water. When the exhaust gas enters the spray chamber, residual dust and harmful substances in the exhaust gas are purified by the spray. Simultaneously, the sludge-water mixture produced during spraying falls to the bottom of the spray chamber and is then... The filtration device filters impurities from the mud-water mixture, and the filtered water passes through the filtration device into the storage chamber. A water pump draws water from the storage chamber inside the spray tank and delivers it to the water pipe. Then, the water is atomized and sprayed into the spray tank through spray nozzles installed outside the water pipe. This achieves filtration of harmful substances in the exhaust gas and water recycling. When it is necessary to change the water inside the spray tank, the output end of the impurity discharge device is opened, allowing the water and sediment inside the spray tank to be discharged through the rotating screw conveyor. The spray tank is equipped with a longitudinally movable device that elastically abuts against the first filter. The cleaning device on the filter plate surface cleans the surface of the first filter plate and the filter device while moving longitudinally. By installing a horizontally movable jet device on the other side of the storage chamber near the first filter plate and the filter device, the jet device sprays air in the opposite direction from the other side of the first filter plate and the filter device while the cleaning device cleans them. This prevents impurities from penetrating the first filter plate and the filter device and entering the storage chamber during cleaning, thus further purifying the exhaust gas and simultaneously achieving water recycling in the spray box, solving the technical problem of water waste. Furthermore, this application includes an air storage device at the rear of the secondary purification device. When the internal pressure of the air storage device reaches a set limit, the electromagnetic pulse valve outside the soot blowing pipe opens, rapidly outputting compressed gas from the air storage device to the air filter element through the air pipe. This blows off the dust adsorbed on the surface of the air filter element, enabling the soot blowing pipe to clean the air filter element and solving the problem of inconvenient dust cleaning of the air filter element surface. Attached Figure Description

[0020] Figure 1This is a three-dimensional structural diagram of a secondary aluminum ash calcination treatment equipment and method based on rotary flue gas self-cleaning. Figure 1 ; Figure 2 This is a schematic diagram of the working state of a secondary aluminum ash calcination treatment equipment and method based on rotary flue gas self-cleaning. Figure 3 This is a three-dimensional diagram of the secondary purification device in the secondary aluminum ash calcination treatment equipment and method based on rotary flue gas self-cleaning. Figure 4 This is a schematic diagram of the internal structure of the secondary purification device in the secondary aluminum ash calcination treatment equipment and method based on rotary flue gas self-cleaning. Figure 5 This is a three-dimensional diagram of the gas storage device in the secondary aluminum ash calcination treatment equipment and method based on rotary flue gas self-cleaning. Figure 6 This is a three-dimensional diagram of the filter element in the secondary aluminum ash calcination treatment equipment and method based on rotary flue gas self-cleaning; Figure 7 This is a cross-sectional view of the spray box in the secondary aluminum ash calcination treatment equipment and method based on rotary flue gas self-cleaning; Figure 8 This is an exploded view of the filtration device in the secondary aluminum ash calcination treatment equipment and method based on rotary flue gas self-cleaning; Figure 9 This is a three-dimensional diagram of the impurity removal device in the secondary aluminum ash calcination treatment equipment and method based on rotary flue gas self-cleaning; Figure 10 This is a schematic diagram of the internal structure of the spray box in a secondary aluminum ash calcination treatment equipment and method based on rotary flue gas self-cleaning. Figure 11 This is a three-dimensional diagram of the cleaning device in the secondary aluminum ash calcination treatment equipment and method based on rotary flue gas self-cleaning; Figure 12 This is a three-dimensional view of the spray box in the secondary aluminum ash calcination treatment equipment and method based on rotary flue gas self-cleaning.

[0021] The diagram is labeled as follows: 1. Spray box; 101. Impurity removal device; 1010. Screw conveyor; 1011. First rotary drive component; 1012. Sealing component; 102. Mounting bracket; 1021. First filter plate; 103. Mounting groove; 1031. Limiting groove; 1032. Filtering device; 1033. Second filter plate; 1034. Sealing plate; 1035. Handle; 1036. Limiting block; 104. Water pump; 1041. Water pipe; 1042. Spray head; 105. Box cover; 1051. Exhaust pipe; 106. First air inlet; 2. Secondary purification. Device; 201, Second air inlet; 202, Exhaust outlet; 203, Air storage device; 2031, Air pipe; 2032, Soot blowing pipe; 2033, Electromagnetic pulse valve; 204, Mounting plate; 205, Air filter element; 3, Cyclone filter tower; 4, First flue; 5, Second flue; 6, Cleaning device; 601, Cleaning brush; 602, Movable rod; 603, Return spring; 604, First slide rod; 605, Second rotary drive component; 606, Lead screw; 7, Second slide rod; 8, Moving frame; 801, Jet jet device; 802, Telescopic assembly; 9, Fan. Detailed Implementation

[0022] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0023] See Figures 1-12 As shown, the secondary aluminum ash calcination treatment equipment based on rotary flue gas self-cleaning includes a spray box 1. A mounting frame 102 is longitudinally arranged at the center of the spray box 1. A first filter plate 1021 for filtering air is installed inside the mounting frame 102. A filter device 1032 for filtering slurry is installed inside the spray box 1 near the bottom of the mounting frame 102. A cleaning device 6, capable of longitudinal movement, is installed inside the spray chamber of the spray box 1 to clean one side of the first filter plate 1021 and the filter device 1032. A horizontally movable cleaning device 6 is also installed inside the storage chamber of the spray box 1 to clean the first filter plate 1021. The spray device 801 cleans the other side of the filter device 1032 and the spray chamber inside the spray box 1. The bottom of the spray chamber is provided with a debris discharge device 101 for collecting sediment. The debris discharge device 101 is provided with a spiral conveyor rod 1010 for discharging sediment. A secondary purification device 2 for removing small particles from the exhaust is provided on one side of the spray box 1. Several air filter elements 205 for filtering small particles in the exhaust gas are evenly distributed in the center of the secondary purification device 2. Several dust blowing pipes 2032 for removing dust from the surface of the air filter elements 205 are evenly distributed at the top of the secondary purification device 2.

[0024] In use, a mounting frame 102 is installed inside the spray box 1, and a first filter plate 1021 is installed inside the mounting frame 102 to filter the air. A filter device 1032 is installed at an angle at the bottom inside the spray box 1, forming a spray chamber and a storage chamber for storing purified water. The filter device 1032 filters the mud-water mixture generated during spray filtration, and the filtered water enters the storage chamber. Impurities generated during filtration are deposited inside the impurity discharge device 101. When the impurities accumulate to a certain amount, they are discharged by rotating the spiral conveyor rod 1010. A cleaning device 6 is installed inside the spray chamber, which can move longitudinally and elastically abut against the surface of the first filter plate 1021. The cleaning device 6 moves longitudinally while cleaning the first filter plate 1021 and the filter device 1032. The surface is cleaned by installing a horizontally movable jet device 801 on the other side of the storage chamber 1 near the first filter plate 1021 and the filter device 1032. When the cleaning device 6 cleans the surface of the first filter plate 1021 and the filter device 1032, the jet device 801 sprays air in the opposite direction from the other side of the first filter plate 1021 and the filter device 1032, so as to prevent impurities from penetrating the first filter plate 1021 and the filter device 1032 and entering the storage chamber during cleaning. Several air filter elements 205 are evenly arranged longitudinally inside the secondary purification device 2, so that the air filter elements 205 filter the small particles inside the emission. By installing a soot blowing pipe 2032 at the center of the top of the air filter element 205, the soot blowing pipe 2032 intermittently sprays high-pressure gas, and then cleans the dust adsorbed on the surface of the air filter element 205 through the soot blowing pipe 2032.

[0025] See Figure 12 As shown, the bottom center of the spray box 1 is provided with a mounting groove 103 for installing the filter device 1032, and the top of the mounting groove 103 is provided with a limiting groove 1031 for limiting the filter device 1032.

[0026] In use, by setting an installation groove 103 near the center of the bottom of the spray box 1 and setting a limiting groove 1031 at the top of the installation groove 103, the filter device 1032 is installed inside the installation groove 103.

[0027] See Figure 8 As shown, the bottom of the filter device 1032 is inclinedly provided with a second filter plate 1033 for filtering mud, and one end of the filter device 1032 is provided with a sealing plate 1034 for sealing installation. A handle 1035 is provided at the center of one side of the sealing plate 1034 to facilitate the removal of the filter device 1032 from the inside of the spray box 1. The top of the filter device 1032 is provided with a limiting block 1036 that can be adapted to the limiting groove 1031.

[0028] In use, a second filter plate 1033 is inclinedly installed at the bottom of the filter device 1032, so that the second filter plate 1033 filters impurities in the water during the filter spray. A sealing plate 1034 is installed at one end of the filter device 1032, so that the sealing plate 1034 seals the mounting groove 103 to prevent water from flowing out. A handle 1035 is installed at the center of one side of the sealing plate 1034, so that the filter device 1032 can be quickly removed from the mounting groove 103 through the handle 1035.

[0029] See Figure 7 As shown, a first air inlet 106 that can communicate with the interior of the spray chamber is provided on one side of the spray box 1, and a box cover 105 is provided on the top of the spray box 1. An exhaust pipe 1051 for exhausting is provided above the storage chamber at one end of the box cover 105.

[0030] In use, a first air inlet 106 is provided on one side of the spray box 1, so that the exhaust gas enters the spray chamber inside the spray box 1 through the first air inlet 106. The box cover 105 is fixed to the top of the spray box 1, so that the box cover 105 seals the top of the spray box 1. An exhaust pipe 1051 is provided at one end of the box cover 105, and the exhaust pipe 1051 is located at the top of the storage chamber, so that the purified gas is discharged through the exhaust pipe 1051.

[0031] See Figure 1 and Figure 7 As shown, a water pump 104 that can communicate with the storage chamber is provided at the bottom of the rear side of the spray box 1. A water pipe 1041 extending into the spray chamber is provided at the output end of the water pump 104, and a number of spray nozzles 1042 for spraying water are provided on the outside of the water pipe 1041.

[0032] In use, the water pump 104 draws out the purified water from the storage chamber inside the spray box 1 and delivers it to the water pipe 1041, so that the spray head 1042 outside the water pipe 1041 sprays the water onto the spray area.

[0033] See Figure 9 As shown, a removable seal 1012 is provided on the outside of the output end of the impurity removal device 101, and a first rotary drive 1011 is provided at the end of the impurity removal device 101 away from the output end to drive the screw conveyor 1010 to rotate.

[0034] In use, a sealing element 1012 is provided at the output end of the impurity removal device 101, so that the sealing element 1012 seals the output end of the impurity removal device 101. When it is necessary to remove impurities from the impurity removal device 101, the sealing element 1012 is opened, and at the same time, the first rotation drive element 1011 drives the screw conveyor 1010 to rotate, thereby causing the screw conveyor 1010 to remove impurities from the impurity removal device 101.

[0035] See Figure 4 and Figure 6 As shown, a mounting plate 204 is horizontally installed on the inner side of the secondary purification device 2 near the top, and multiple sets of air filter elements 205 for purifying gas are evenly distributed on the mounting plate 204.

[0036] In use, the top of the air filter element 205 is mounted on the mounting plate 204 by fixing the mounting plate 204 inside the secondary purification device 2.

[0037] See Figure 5 As shown, a pressurized air storage device 203 is symmetrically arranged at the lower rear side of the secondary purification device 2. The output end of the air storage device 203 is provided with an air pipe 2031 that can extend into the interior of the secondary purification device 2. Multiple sets of downward-facing soot blowing pipes 2032 are symmetrically arranged on both sides of the air pipe 2031. The output ends of the soot blowing pipes 2032 are respectively located at the center of the top of the air filter element 205. An electromagnetic pulse valve 2033 for controlling the air jet is provided on the outside of the soot blowing pipe 2032.

[0038] In use, by setting an air storage device 203 on the rear side of the secondary purification device 2, when the internal pressure of the air storage device 203 reaches the set limit, the electromagnetic pulse valve 2033 outside the soot blowing pipe 2032 opens, thereby quickly outputting the compressed gas inside the air storage device 203 to the air filter element 205 through the air pipe 2031, and then blowing off the dust adsorbed on the surface of the air filter element 205.

[0039] See Figure 3 As shown, a second air inlet 201 for air intake is provided at the bottom of one end of the secondary purification device 2, and an exhaust port 202 for exhaust is provided at the top of the other end of the secondary purification device 2, and a second flue 5 that can communicate with the first air inlet 106 is installed at one end of the exhaust port 202.

[0040] In use, by setting a second flue 5 at one end of the exhaust port 202 and connecting one end of the second flue 5 to the first air inlet 106, the gas inside the secondary purification device 2 is transported to the spray box 1 through the second flue 5.

[0041] See Figure 1 and Figure 2 As shown, a cyclone filter tower 3 for purifying gas is provided on one side of the secondary purification device 2, and a first flue 4 that can be connected to the output end of the cyclone filter tower 3 is installed at one end of the second air inlet 201.

[0042] In use, a first flue 4 is set at one end of the second air inlet 201, and one end of the first flue 4 is installed at the output end of the cyclone filter tower 3, so that the gas inside the cyclone filter tower 3 is transported to the secondary purification device 2 through the first flue 4.

[0043] See Figure 11 As shown, first slide rods 604 are symmetrically arranged on both sides of the spray chamber inside the spray box 1, and a second rotary drive 605 is arranged at the center of the top of the spray box 1. A lead screw 606 is rotatably arranged at the output end of the second rotary drive 605. A cleaning device 6 is movably installed on the outside of the lead screw 606, and both ends of the cleaning device 6 are movably installed outside the first slide rods 604. A cleaning brush 601 that can move horizontally is arranged on one side of the cleaning device 6. Several movable rods 602 that are movably installed inside the cleaning device 6 are symmetrically arranged on one side of the cleaning brush 601. A return spring 603 is arranged on the outside of the movable rod 602 near the cleaning brush 601.

[0044] In use, the cleaning device 6 is movably mounted on the outside of the lead screw 606, so that the second rotary drive 605 drives the cleaning device 6 to move longitudinally back and forth along the first slide bar 604 via the lead screw 606. By setting several movable rods 602 on one side of the cleaning brush 601, the movable rods 602 are installed through the inside of the cleaning device 6, and a return spring 603 is set on the outside of the movable rods 602, so that the return spring 603 drives the cleaning brush 601 to move laterally and abut against the surface of the first filter plate 1021, thereby cleaning the impurities on the surface of the first filter plate 1021 when the cleaning brush 601 moves longitudinally.

[0045] See Figure 10 As shown, several second slide rods 7 are horizontally arranged inside the storage compartment of the spray box 1 near the first filter plate 1021. A movable frame 8 is movably installed on the outside of the second slide rods 7. An air jet device 801 for cleaning the first filter plate 1021 is provided on one side of the movable frame 8. A telescopic component 802 for driving the movable frame 8 to slide along the second slide rods 7 is symmetrically arranged on one side of the storage compartment inside the spray box 1. A fan 9 is provided at the bottom of the spray box 1. The output end of the fan 9 is connected to the movable frame 8 through a conveying pipe.

[0046] In use, by fixing the jet device 801 to one side of the movable frame 8 and sliding the movable frame 8 to the outside of the second slide rod 7, by fixing the telescopic component 802 to one side of the storage box inside the spray box 1 and fixing the output end of the telescopic component 802 to one side of the movable frame 8, the telescopic component 802 drives the movable frame 8 to move horizontally along the second slide rod 7. By setting a fan 9 at the bottom of the spray box 1 that can communicate with the jet device 801, the fan 9 delivers air to the inside of the jet device 801 through the delivery pipe, so that the jet device 801 blows the impurities remaining on the outside of the first filter plate 1021 into the spray chamber.

[0047] The rotary flue gas self-cleaning method, applied to a secondary aluminum ash calcination treatment equipment based on rotary flue gas self-cleaning, includes the following steps: S1. The smoke and dust generated during the secondary aluminum ash calcination enters through the air inlet of the cyclone filter tower 3. Inside the cyclone filter tower 3, larger dust particles are separated by centrifugal force and discharged through the discharge port at the bottom of the cyclone filter tower 3. At the same time, the separated smoke and dust inside the cyclone filter tower 3 enters the secondary purification device 2 through the first flue 4. The air filter element 205 inside the secondary purification device 2 filters the fine particles in the smoke and dust. Then, it is transported to the spray box 1 through the second flue 5 and discharged through the exhaust pipe 1051 at the top of the spray box 1. S2. When the smoke and dust enter the spray box 1, it is first placed inside the spray chamber. Then, the water in the storage chamber is drawn out by the water pump 104 and sprayed into the spray chamber through the spray head 1042 at one end of the water pipe 1041, thereby filtering the harmful gases in the smoke and dust. At the same time, the spray can also repeatedly filter the small amount of dust remaining in the smoke and dust. The mud-water mixture generated when the smoke and dust is repeatedly filtered in the spray chamber falls to the bottom and settles into the impurity discharge device 101. When it is necessary to clean the inside of the impurity discharge device 101, the seal 1012 at the output end of the impurity discharge device 101 is opened, and then the first rotary drive 1011 drives the spiral conveyor 1010 to rotate and discharge the settled impurities. S3. By providing a filter device 1032 at the bottom of the first filter plate 1021, the filter device 1032 filters the mud-water mixture generated during spraying, preventing the mud-water mixture from directly entering the storage chamber. Furthermore, by providing a longitudinally movable cleaning device 6 inside the spray chamber, and by providing a working end of the cleaning device 6 that is elastically connected to one side of the first filter plate 1021 and the filter device 1032, the cleaning device 6 can clean one side of the first filter plate 1021 and the filter device 1032 when it moves longitudinally. By providing a horizontally movable jetting device 801 inside the storage chamber near the other side of the first filter plate 1021 and the filter device 1032, the jetting device 801 blows air onto the other side of the first filter plate 1021 and the filter device 1032, preventing impurities from penetrating into the storage chamber when the cleaning device 6 cleans the first filter plate 1021 and the filter device 1032.

[0048] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A secondary aluminum ash calcination treatment device based on rotary flue gas self-cleaning, comprising a spray box, characterized in that, A mounting frame is longitudinally arranged at the center of the spray box. Inside the mounting frame is a first filter plate for filtering air. A filter device for filtering sludge is located near the bottom of the mounting frame inside the spray box. Inside the spray chamber inside the spray box is a cleaning device that can move longitudinally to clean one side of the first filter plate and the filter device. Inside the storage chamber inside the spray box is a movable air jet device that can move horizontally to clean the other side of the first filter plate and the filter device. Finally, a debris collection and removal device is located at the bottom of the spray box. Furthermore, the internal rotating part of the waste removal device is equipped with a spiral conveyor rod for discharging sediment. A secondary purification device for removing fine particles from the emissions is located on one side of the spray box. Several air filter elements for filtering fine particles in the exhaust gas are evenly distributed at the center of the secondary purification device, and several dust-blowing pipes for removing dust from the surface of the air filter elements are evenly distributed at the top of the secondary purification device. A second filter plate for filtering sludge is inclinedly installed at the bottom of the filtration device, and a sealing plate for sealing installation is provided at one end of the filtration device. A convenient feature for removing the filter is located at the center of one side of the sealing plate. The device has a handle that can be removed from inside the spray box. The top of the filter device is equipped with a limiting block that can fit into the limiting groove. The cleaning device includes a cleaning brush, a movable rod, a return spring, a first sliding rod, a second rotary drive component, and a lead screw. The first sliding rods are symmetrically arranged on both sides of the spray chamber inside the spray box, and the second rotary drive component is located at the center of the top of the spray box. A lead screw is rotatably mounted on the output end of the second rotary drive component. The cleaning device is movably mounted on the outside of the lead screw, and both ends of the cleaning device are movably mounted outside the first sliding rods. A horizontally movable cleaning brush is provided on one side of the cleaning device. A number of movable rods are symmetrically arranged on one side of the sweeping brush and are movably installed inside the cleaning device. A return spring is provided on the outside of the movable rod near the sweeping brush. A number of second sliding rods are horizontally arranged inside the storage box of the spray box near the first filter plate. A movable frame is movably installed on the outside of the second sliding rods. The air jet device is located on one side of the movable frame and is used to clean the first filter plate by air jet. A telescopic component for driving the movable frame to slide along the second sliding rod is symmetrically arranged on one side of the storage chamber inside the spray box. A fan is provided at the bottom of the spray box, and the output end of the fan is connected to the movable frame through a conveying pipe.

2. The secondary aluminum ash calcination treatment equipment based on rotary flue gas self-cleaning as described in claim 1, characterized in that, The spray box has a mounting groove at the center of its bottom for installing a filter device, and a limiting groove at the top of the mounting groove for limiting the filter device. A first air inlet that can communicate with the interior of the spray box is provided on one side of the spray box, and a box cover is provided at the top of the spray box. An exhaust pipe for venting is provided above the storage chamber at one end of the box cover. A water pump that can communicate with the storage chamber is provided at the bottom of the rear side of the spray box. A water pipe extending into the interior of the spray box is provided at the output end of the water pump, and several spray nozzles for spraying water are provided outside the water pipe.

3. The secondary aluminum ash calcination treatment equipment based on rotary flue gas self-cleaning according to claim 2, characterized in that, The output end of the impurity removal device is provided with a removable seal, and the end of the impurity removal device away from the output end is provided with a first rotary drive for driving the screw conveyor to rotate.

4. The secondary aluminum ash calcination treatment equipment based on rotary flue gas self-cleaning according to claim 3, characterized in that, The secondary purification device has a mounting plate horizontally arranged near the top on its inner side, and multiple sets of air filters for purifying the gas are evenly distributed on the mounting plate.

5. The secondary aluminum ash calcination treatment equipment based on rotary flue gas self-cleaning according to claim 4, characterized in that, A pressurized air storage device is symmetrically arranged at the lower rear side of the secondary purification device. The output end of the air storage device is provided with an air pipe that can extend into the interior of the secondary purification device. Multiple sets of downward-facing soot blowing pipes are symmetrically arranged on both sides of the air pipe. The output ends of the soot blowing pipes are respectively located at the center of the top of the air filter element. An electromagnetic pulse valve for controlling the air jet is provided on the outside of the soot blowing pipe.

6. The secondary aluminum ash calcination treatment equipment based on rotary flue gas self-cleaning according to claim 5, characterized in that, The secondary purification device has a second air inlet at the bottom of one end for air intake, and an exhaust port at the top of the other end for exhaust, with a second flue installed at one end of the exhaust port that can communicate with the first air inlet.

7. A rotary flue gas self-cleaning method, applied to the secondary aluminum ash calcination treatment equipment based on rotary flue gas self-cleaning as described in claim 6, characterized in that, Includes the following steps: S1. The fumes generated during the secondary aluminum ash calcination enter through the inlet of the cyclone filter tower. Inside the cyclone filter tower, larger dust particles are separated by centrifugal force and discharged through the discharge port at the bottom of the cyclone filter tower. At the same time, the fumes separated inside the cyclone filter tower enter the secondary purification device through the first flue. The air filter element inside the secondary purification device filters the fine particles in the fumes and then transports them to the spray box through the second flue and discharges them through the exhaust pipe at the top of the spray box. S2. When the smoke and dust enter the spray box, it first enters the spray chamber. Then, the water pump draws water out of the storage chamber and sprays it into the spray chamber through the spray head at one end of the water pipe, thereby filtering the harmful gases in the smoke and dust. At the same time, the spray can also repeatedly filter the small amount of dust remaining in the smoke and dust. The mud-water mixture generated during the repeated filtration of the smoke and dust in the spray chamber falls to the bottom and settles into the impurity discharge device. When it is necessary to clean the inside of the impurity discharge device, the seal at the output end of the impurity discharge device is opened, and then the first rotating drive component drives the screw conveyor to rotate and discharge the settled impurities. S3. By setting a filter device at the bottom of the first filter plate, the filter device filters the mud-water mixture generated during spraying, preventing the mud-water mixture from directly entering the storage chamber. Furthermore, by setting a longitudinally movable cleaning device inside the spray chamber, and the working end of the cleaning device being elastically connected to one side of the first filter plate and the filter device, the cleaning device can clean one side of the first filter plate and the filter device when it moves longitudinally. By setting a horizontally movable air jet device inside the storage chamber near the other side of the first filter plate and the filter device, the air jet device blows air onto the other side of the first filter plate and the filter device, preventing impurities from penetrating into the storage chamber when the cleaning device cleans the first filter plate and the filter device.

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