A feeding device and process for calcium oxide production based on the regeneration of waste stone powder

Abstract

The present invention relates to the field of production feeding equipment, and particularly to a calcium oxide production feeding equipment and process based on the regeneration of waste stone powder, including a roller hearth kiln. The roller hearth kiln includes a kiln furnace. Inside the lower part of the kiln furnace, there is a roller rack. On both sides of the upper part of the roller rack, there are docking ports. On both sides inside the roller rack, uniformly distributed fixed guide rods are installed. The inlet end of the roller hearth kiln is connected to a feeding conveyor rack, and the outlet end of the roller hearth kiln is connected to a discharging conveyor rack. On the upper parts of the roller rack, the feeding conveyor rack and the discharging conveyor rack, there are trays. In the middle of both ends of each tray, there are fixed columns fixedly connected. At the ends of the fixed columns, there are bayonets. The present invention can effectively reduce the cost input by using marble waste as a preparation raw material, and can reduce the equipment cost input and site cost input by leasing the tile baking kiln of an idle tile factory. At the same time, the modification of the original roller hearth kiln is extremely small, which is beneficial to actual use.

Description

Technical Field

[0001] The present invention relates to the field of production feeding equipment, and in particular to a calcium oxide production feeding equipment and process based on the regeneration of waste stone powder. Background Art

[0002] In the field of calcium oxide production, production efficiency and cost control have always been the focus of the industry. There are many drawbacks in traditional calcium oxide preparation processes and equipment. On the one hand, in the raw material processing link, many enterprises rely on high-priced special raw materials, resulting in high production costs. On the other hand, the purchase of equipment and the lease of sites require huge investments. The transformation of large-scale equipment such as kilns not only has a complex process, but also seriously affects the subsequent normal use of the original equipment. In terms of material transportation and processing, there is a lack of an efficient connection mechanism in the loading and unloading process, and the positioning is inaccurate during the recycling process of the trays, resulting in low overall production efficiency. In the prior art, it is impossible to ensure complete dumping of the material when unloading the tray. The residual material not only causes waste, but also affects the subsequent production process. In addition, the tray is prone to deviation during transportation, making it difficult to achieve continuous and stable cyclic operation, which severely restricts the improvement of production efficiency. Therefore, we propose a calcium oxide production feeding equipment and process based on the regeneration of waste stone powder to solve the above-mentioned problems. Summary of the Invention

[0003] The purpose of the present invention is to solve the disadvantages existing in the background art, and to propose a calcium oxide production feeding equipment and process based on the regeneration of waste stone powder.

[0004] To achieve the above object, the technical solution adopted by the present invention is: a calcium oxide production feeding equipment based on the regeneration of waste stone powder, including a roller hearth kiln, the roller hearth kiln includes a kiln furnace, a roller rack is arranged inside the lower part of the kiln furnace, docking ports are opened on both sides of the upper part of the roller rack, uniformly distributed fixed guide rods are installed on both sides inside the roller rack, a feeding conveyor is connected to the inlet end of the roller hearth kiln, a discharging conveyor is connected to the outlet end of the roller hearth kiln, trays are arranged on the upper parts of the roller rack, the feeding conveyor and the discharging conveyor, fixed columns are fixedly connected to the middle parts of both ends of the tray, and bayonets are opened at the ends of the fixed columns;

[0005] The kiln furnace is used for calcining and decomposing waste stone powder;

[0006] The feeding conveyor is used for feeding and transporting the tray and waste stone powder;

[0007] The discharging conveyor is used for discharging and dumping the calcium oxide formed on the tray;

[0008] The main parts of the feeding conveyor rack and the discharging conveyor rack are mirror - set. Both the feeding conveyor rack and the discharging conveyor rack include a top rack. Walking racks are installed at the bottom of the top racks. A plurality of guide rollers are arranged on the inner sides of the upper parts of the top racks. Motors are connected to the ends of the outermost guide rollers. Docking blocks are fixedly connected to both sides of one part of the top rack close to the roller rack. The docking blocks are all clamped inside the docking ports. The roller rack and the docking blocks are connected by fixing bolts. Fixing rings are fixedly connected to both ends of the outer periphery of the outermost guide rollers. Connecting rods are fixedly connected to the tops of the fixing rings. The ends of the connecting rods are slidably connected with clamping columns. The clamping columns correspond to the clamping openings at the ends of the fixing columns.

[0009] Preferably, guide frames are installed at the inner ends of the top racks. Guide rails are fixedly connected to one ends of the guide frames close to the top racks. The guide rails are all slidably connected with the limiting rings. Protruding parts are arranged on one sides of the guide rails.

[0010] Preferably, reserved grooves are opened on both sides inside the top racks. The reserved grooves correspond to the connecting rods.

[0011] Preferably, through - grooves are opened on the sides of the guide frames away from the trays. The clamping columns are all arranged inside the through - grooves.

[0012] Preferably, driving bevel gears are fixedly connected to both sides of the outer periphery of the outermost guide rollers. Driven bevel gears are meshed with the lower parts of the driving bevel gears. Rotating rods are fixedly connected to the middles of the driven bevel gears. One sides of the lower parts of the outer peripheries of the rotating rods are connected with rotating shafts through transmission components. The rotating rods and the rotating shafts are both rotatably connected inside the top racks.

[0013] Preferably, fixed shells are fixedly connected to the lower parts of both sides of the top racks. Telescopic guide rods penetrate through both sides of the top racks and the fixed shells. The telescopic guide rods are all slidably connected with the top racks. Limiting grooves are opened on one sides of the outer peripheries of the telescopic guide rods. The fixed shells are partially slidably connected with the limiting grooves. Return springs are sleeved inside the limiting grooves. The return springs are all arranged inside the fixed shells. Tooth grooves are opened in the middles of the outer peripheries of one side of the telescopic guide rods. Incomplete gears are fixedly connected to the lower parts of the outer peripheries of the rotating shafts. One sides of the incomplete gears are meshed with the tooth grooves.

[0014] Preferably, push plates penetrate through the ends of the telescopic guide rods. Fixed blocks are fixedly connected to the middles of the sides of the push plates close to the top racks. Slide columns are fixedly connected to the bottoms of the fixed blocks. Mounting frames are arranged on the sides of the push plates close to the top racks. The mounting frames are all fixedly connected to one side of the top rack. Servo motors are installed on the tops of the mounting frames. Driving ends of the servo motors are fixedly connected with cams. Guide grooves are opened on the tops of the cams. The ends of the slide columns are slidably connected inside the guide grooves.

[0015] Preferably, a plurality of spring buckles are arranged in the middle of the outer periphery of the fixed column, and a plurality of tapered grooves are formed in the inner sides of the guide frames.

[0016] Preferably, a limiting ring is fixedly connected to one side of the outer periphery of each clamping column, a top spring is arranged on the side of each limiting ring away from the clamping column, and each top spring is sleeved on the outer end of the connecting rod.

[0017] Preferably, a calcium oxide production feeding process based on the regeneration of waste stone powder includes the following operation steps:

[0018] S1. Raw material pretreatment

[0019] S1.1. Crushing and screening: Recycle the stone powder and crushed stone waste remaining from marble processing, and use a crusher to crush the crushed stones into stone powder to improve the calcination efficiency.

[0020] S1.2. Cleaning and impurity removal: Wash with water to remove the surface soil and impurities, and dry or bake for later use.

[0021] S2. Kiln selection and preparation

[0022] S2.1. Renting a kiln: Contact the tile processing to select a suitable idle kiln to ensure that the maximum temperature of the kiln can reach above 1000 °C.

[0023] S2.2. Equipment debugging: Check the tightness of the kiln, the fuel system and the temperature control instrument to ensure normal operation.

[0024] S2.3. Equipment transformation: Connect the feeding conveyor frame and the discharging conveyor frame to the head and tail of the roller frame, align the installation holes on the docking block and the docking port, and then pass the fixing bolts through the installation holes to realize the connection and fixation of the roller frame with the feeding and discharging conveyor frames.

[0025] S3. Loading the kiln and calcining

[0026] S3.1. Loading method: After the feeding conveyor frame and the discharging conveyor frame are both installed, introduce the waste stone powder to be calcined into the tray on the feeding conveyor frame. When loading, spread the waste stone powder evenly in the tray to avoid excessive stacking.

[0027] S3.2. Then, the tray can be conveyed to the roller frame through the feeding conveyor frame, and the tray is introduced into the inner side of the kiln through the roller frame, and the kiln is started to calcine the waste stone powder inside the tray.

[0028] S3.3. Heating stage: Slowly heat up to 900 - 1000 °C at a rate of 50 - 100 °C per hour to prevent cracking caused by thermal stress.

[0029] S3.4. Isothermal calcination: Keep the target temperature for 4 - 8 hours to ensure complete decomposition of calcium carbonate.

[0030] S3.5, Cooling treatment: Turn off the heat source and let the kiln cool naturally to below 200 °C before discharging the material to prevent calcium oxide from absorbing moisture when it comes into contact with water;

[0031] S4, Post-treatment and storage

[0032] S4.1, Discharging and screening: Place an aggregate bin at the end of the feeding and discharging conveyor rack. Then, when the pallet is flipped through the feeding and discharging conveyor rack, pour the produced calcium oxide into the aggregate bin;

[0033] S4.2, Sealed storage: Load calcium oxide into a moisture-proof and sealed container and place it in a dry environment to avoid reacting with air moisture to form calcium hydroxide;

[0034] S5, Environmental protection and safety measures

[0035] S5.1, Exhaust gas treatment: Use a carbon dioxide collection device to collect the decomposed carbon dioxide, reduce direct emissions, and retain the carbon dioxide for reuse;

[0036] S5.2, Dust control: Use bag filters in the crushing and discharging processes, and operators wear N95 dust masks;

[0037] S5.3, Personal protection: Wear heat-insulating gloves, goggles, and fireproof clothing, and set up a ventilation system in the kiln area.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. When the present invention is actually used, people can connect the feeding and discharging conveyor racks with the head and tail of the roller rack. Through the walking rack, it is convenient for people to move the feeding and discharging conveyor racks. When connecting, first move the feeding and discharging conveyor racks so that the docking blocks can be inserted into the docking ports, align the mounting holes on the docking blocks and the docking ports, and then pass the fixing bolts through the mounting holes, thereby realizing the connection and fixation of the roller rack and the feeding and discharging conveyor racks. Using marble waste as the preparation raw material can effectively reduce the cost input. Renting the tile baking kiln in an idle tile factory can reduce the equipment cost input and the site cost input. At the same time, the modification of the original roller hearth kiln is extremely small. Only temporary installation of the feeding and discharging conveyor racks and fixed guide rods is required for production work. The installation is fast, and the normal work of the original roller hearth kiln is not affected after disassembly.

[0040] 2. After the calcination is completed, the tray will be guided to the blanking conveyor rack under the conveyance of the roller rack. When the tray is conveyed to the end of the blanking conveyor rack, the fixed columns on both sides of the tray will enter the inner side of the guide rack. At this time, under the drive of the guide roller at the end, the clamping column at the end of the connecting rod will be stuck into the bayonet inside the end of the fixed column. After that, when the guide roller rotates further, the fixed column and the tray will be driven by the fixed ring, the connecting rod and the clamping column to be flipped, so that the calcium oxide inside the tray can be unloaded, and the calcium oxide can be introduced into the aggregate box, which is beneficial to actual use.

[0041] 3. The guiding and flipping of the tray can be realized through the through groove. During this process, when the fixed column is guided to the conical groove, the spring buckle on the fixed column will directly pop out and be stuck into the conical groove to pause the flipping process of the tray, so that the calcium oxide inside the tray will be more thoroughly poured into the aggregate box under the action of inertia. After that, under the continuous rotation of the guide roller, the spring buckle will be pressed back into the fixed column under the action of the inclined groove on the edge of the conical groove, so that the tray can be continuously flipped. Through multiple groups of conical grooves, multi-point pauses of the tray can be realized, so that the complete dumping of the calcium oxide inside the tray can be realized.

[0042] 4. After the calcium oxide inside the tray is dumped, the connecting rod and the clamping column will further drive the tray to be flipped. When the tray is completely flipped with the opening facing down, the telescopic guide rod will pop out to support the end of the tray. At the same time, the limiting ring on the clamping column will encounter the protrusion on the guide rail, so that the top spring will be compressed, and the clamping column will withdraw from the end of the fixed column. When the tray is completely flipped, the top of the tray will contact the guide roller and the conveying roller on the roller rack. At this time, under the action of friction, the tray will be guided back to the feeding conveyor rack. Through the feeding conveyor rack, the guided tray can be flipped to return it to the top of the feeding conveyor rack, so that the recycling of the tray can be completed, which is beneficial to actual use.

[0043] 5. During the recycling process of the tray, the servo motor can drive the cam to rotate. Through the guide groove on the cam, the fixed block can be guided and constrained, so that the push plate can always be close to the outer circumference of the cam. When the cam rotates, it will drive the push plate to move back and forth on the telescopic guide rod. During this process, the two sides of the tray on the telescopic guide rod can be "clamped and centered" through the push plate, so that the tray can be more accurate both after being exported from the blanking conveyor rack and before being imported into the feeding conveyor rack, which is beneficial to the continuous and stable recycling work of the tray. Description of the Drawings

[0044] Figure 1 It is a schematic structural diagram of a calcium oxide production feeding device and process based on the regeneration of waste stone powder according to the present invention;

[0045] Figure 2Schematic diagram of the structure after installation of a feeding device and process for producing calcium oxide based on the regeneration of waste stone powder according to the present invention;

[0046] Figure 3 Schematic diagram of the partial structure at the blanking and conveying frame of a feeding device and process for producing calcium oxide based on the regeneration of waste stone powder according to the present invention;

[0047] Figure 4 Schematic diagram of the partial structure at the top frame of a feeding device and process for producing calcium oxide based on the regeneration of waste stone powder according to the present invention;

[0048] Figure 5 Schematic diagram of the partial structure at the cam of a feeding device and process for producing calcium oxide based on the regeneration of waste stone powder according to the present invention;

[0049] Figure 6 Schematic diagram of the partial structure at the incomplete gear of a feeding device and process for producing calcium oxide based on the regeneration of waste stone powder according to the present invention;

[0050] Figure 7 Schematic diagram of the partial structure at the conical groove of a feeding device and process for producing calcium oxide based on the regeneration of waste stone powder according to the present invention;

[0051] Figure 8 Schematic diagram of the partial structure at the driving bevel gear and driven bevel gear of a feeding device and process for producing calcium oxide based on the regeneration of waste stone powder according to the present invention.

[0052] 1. Roller hearth kiln; 101. Kiln; 102. Top frame; 103. Roller frame; 104. Tray; 105. Docking port; 106. Walking frame; 107. Fixed shell; 108. Connecting plate; 109. Docking block; 110. Guide roller; 111. Telescopic guide rod; 112. Fixed column; 113. Guide frame; 114. Clamping post; 115. Limiting ring; 116. Top spring; 117. Connecting rod; 118. Reserved groove; 119. Incomplete gear; 120. Tooth groove; 121. Fixed guide rod; 122. Push plate; 123. Slide column; 124. Cam; 125. Guide groove; 126. Fixed block; 127. Servo motor; 128. Mounting frame; 129. Guide rail; 130. Through groove; 131. Fixed ring; 132. Driving bevel gear; 133. Driven bevel gear; 134. Transmission component; 135. Rotating rod; 136. Rotating shaft; 137. Limiting groove; 138. Reset spring; 139. Conical groove; 140. Spring buckle. Detailed implementation mode

[0053] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0054] As Figures 1-8 shown, a calcium oxide production feeding device based on the regeneration of waste stone powder includes a roller hearth kiln 1, and the roller hearth kiln 1 includes a kiln furnace 101. An inner side of a lower part of the kiln furnace 101 is provided with a roller rack 103. Opposite interfaces 105 are formed on both upper sides of the roller rack 103. Uniformly distributed fixed guide rods 121 are installed on both inner sides of the roller rack 103. A feeding conveyor frame is connected to an inlet end of the roller hearth kiln 1, and a discharging conveyor frame is connected to an outlet end of the roller hearth kiln 1. Pallets 104 are arranged on upper parts of the roller rack 103, the feeding conveyor frame and the discharging conveyor frame. Fixing columns 112 are fixedly connected to middle parts of both ends of the pallet 104, and bayonets are formed at ends of the fixing columns 112;

[0055] The kiln furnace 101 is used for calcining and decomposing waste stone powder;

[0056] The feeding conveyor frame is used for feeding and conveying the pallet 104 and waste stone powder;

[0057] The discharging conveyor frame is used for discharging and dumping the calcium oxide made on the pallet 104;

[0058] The main parts of the feeding conveyor frame and the discharging conveyor frame are arranged in a mirror image. Both the feeding conveyor frame and the discharging conveyor frame include top frames 102. Walking frames 106 are installed at bottoms of the top frames 102. A plurality of guide rollers 110 are arranged on inner sides of upper parts of the top frames 102. Motors are connected to ends of outermost guide rollers 110. Opposite blocks 109 are fixedly connected to both sides of a part of the top frame 102 close to the roller rack 103. The opposite blocks 109 are respectively clamped inside the opposite interfaces 105. The roller rack 103 and the opposite blocks 109 are connected by fixing bolts. Fixing rings 131 are fixedly connected to both outer ends of the outermost guide rollers 110. Connecting rods 117 are fixedly connected to tops of the fixing rings 131. Clamping columns 114 are slidably connected to ends of the connecting rods 117. The clamping columns 114 correspond to the bayonets at ends of the fixing columns 112. Limiting rings 115 are fixedly connected to one sides of outer peripheries of the clamping columns 114. Spring caps 116 are arranged on one sides of the limiting rings 115 far from the clamping columns 114. The spring caps 116 are respectively sleeved on outer ends of the connecting rods 117. A plurality of spring buckles 140 are arranged in middle parts of outer peripheries of the fixing columns 112. A plurality of tapered grooves 139 are formed on inner sides of guide frames 113;

[0059] Further, in specific implementation, people can connect the feeding and discharging conveying frames at the head and tail with the roller frame 103. The walking frame 106 enables people to conveniently move the feeding and discharging conveying frames. During connection, first move the feeding and discharging conveying frames so that the docking block 109 can be inserted into the docking port 105, align the mounting holes on the docking block 109 and the docking port 105, and then pass the fixing bolts through the mounting holes, thereby enabling the connection and fixation of the roller frame 103 and the feeding and discharging conveying frames. After the feeding and discharging conveying frames are both installed, people can introduce the waste stone powder to be calcined into the tray 104 on the feeding conveying frame. Then, the feeding conveying frame can convey the tray 104 to the roller frame 103, and the roller frame 103 can introduce the tray 104 into the inner side of the kiln 101. By starting the kiln 101, the waste stone powder inside the tray 104 can be calcined, causing the waste stone powder to decompose from calcium carbonate into calcium oxide and carbon dioxide. The carbon dioxide will be centrally exported by the provided extraction device, while the calcium oxide will remain inside the tray 104. After the calcination is completed, the tray 104 will be conveyed by the roller frame 103 and guided to the discharging conveying frame. When the tray 104 is conveyed to the end of the discharging conveying frame, the fixing columns 112 on both sides of the tray 104 will enter the inner side of the guide frame 113. At this time, driven by the guide roller 110 at the end, the clamping column 114 at the end of the connecting rod 117 will snap into the bayonet inside the end of the fixing column 112. Then, when the guide roller 110 rotates further, the fixing column 112 and the tray 104 will be driven by the fixing ring 131, the connecting rod 117, and the clamping column 114 to flip, thereby enabling the calcium oxide inside the tray 104 to be unloaded, and the calcium oxide can be introduced into the aggregate box, which is beneficial for actual use. The through groove 130 can realize the guiding and flipping of the tray 104. During this process, when the fixing column 112 is guided to the tapered groove 139, the spring buckle 140 on the fixing column 112 will directly pop out and snap into the tapered groove 139, realizing the pause of the flipping process of the tray 104, so that the calcium oxide inside the tray 104 will be more thoroughly poured into the aggregate box under the action of inertia. Then, under the continuous rotation of the guide roller 110, the spring buckle 140 will be pressed back into the fixing column 112 under the action of the inclined groove on the side of the tapered groove 139, enabling the tray 104 to continue to flip. Through multiple groups of tapered grooves 139, multi-point pauses of the tray 104 can be realized, thereby enabling the complete unloading of the calcium oxide inside the tray 104.

[0060] Among them, guide frames 113 are installed at the inner ends of the top frame 102. Guide rails 129 are fixedly connected to the ends of the guide frames 113 close to the top frame 102. The guide rails 129 are all slidably connected to the limit rings 115. Protrusions are provided on one side of each of the guide rails 129. Reserved grooves 118 are provided on both sides inside the top frame 102. The reserved grooves 118 correspond to the connecting rods 117. Through grooves 130 are provided on the sides of the guide frames 113 away from the tray 104. The clamping posts 114 are all arranged inside the through grooves 130. Active bevel gears 132 are fixedly connected to both sides of the outer periphery of the outermost guide roller 110. Driven bevel gears 133 are meshed and connected to the lower parts of the active bevel gears 132. Rotating rods 135 are fixedly connected to the middles of the driven bevel gears 133. A transmission assembly 134 is connected to a rotating shaft 136 on one side of the lower part of the outer periphery of the rotating rod 135. The rotating rod 135 and the rotating shaft 136 are both rotatably connected inside the top frame 102;

[0061] Further, in specific implementation, when the calcium oxide in the tray 104 is completely unloaded, the connecting rod 117 and the clamping post 114 will further drive the tray 104 to flip. The active bevel gear 132 at the end of the guide roller 110 will drive the driven bevel gear 133 meshed with it to rotate. The driven bevel gear 133 will drive the rotating rod 135 fixed to it to rotate. When the rotating rod 135 rotates, it will drive the rotating shaft 136 to rotate synchronously by means of the transmission assembly 134. The incomplete gear 119 can be driven to rotate by the rotating shaft 136. When the incomplete gear 119 rotates, it will drive the telescopic guide rod 111 to move by means of the tooth groove 120 meshed with it, so that the return spring 138 is compressed. At this time, the telescopic guide rod 111 is driven to contract, so that the tray 104 can be completely flipped.

[0062] Among them, fixed shells 107 are fixedly connected to the lower parts of both sides of the top frame 102. Telescopic guide rods 111 penetrate through both sides of the top frame 102 and the fixed shells 107. The telescopic guide rods 111 are all slidably connected to the top frame 102. Limit grooves 137 are provided on one side of the outer periphery of each of the telescopic guide rods 111. The fixed shells 107 are partially slidably connected to the limit grooves 137. Return springs 138 are sleeved inside the limit grooves 137. The return springs 138 are all arranged inside the fixed shells 107. Tooth grooves 120 are provided in the middles of the outer peripheries of one side of the telescopic guide rods 111. Incomplete gears 119 are fixedly connected to the lower parts of the outer peripheries of the rotating shafts 136. One side of each of the incomplete gears 119 is meshed with the tooth groove 120;

[0063] Further, in specific implementation, when the tray 104 is completely flipped with the opening facing downward, at this time, the incomplete gear 119 has rotated to the toothless part, causing the telescopic guide rod 111 to lose its limit. Under the action of the return spring 138, the telescopic guide rod 111 will pop out to support the end of the tray 104. At the same time, the limiting ring 115 on the clamping column 114 will encounter the protruding part on the guide rail 129, causing the top spring 116 to be compressed, and the clamping column 114 will withdraw from the end of the fixed column 112. When the tray 104 is completely flipped, the top of the tray 104 will contact the conveying roller on the guide roller 110 and the roller frame 103. At this time, under the action of friction, the tray 104 will be guided back to the loading conveying rack, and the loading conveying rack can flip the guided tray 104 to return it to the top of the loading conveying rack, thereby completing the recycling of the tray 104, which is beneficial to actual use.

[0064] Wherein, push plates 122 penetrate through the ends of the telescopic guide rods 111. In the middle of one side of the push plates 122 close to the top frame 102, fixing blocks 126 are fixedly connected. At the bottom of the fixing blocks 126, sliding columns 123 are fixedly connected. On one side of the push plates 122 close to the top frame 102, mounting frames 128 are arranged. The mounting frames 128 are fixedly connected to one side of the top frame 102. Servo motors 127 are mounted on the tops of the mounting frames 128. The driving ends of the servo motors 127 are fixedly connected with cams 124. Guide grooves 125 are formed on the tops of the cams 124. The ends of the sliding columns 123 are slidably connected to the inner sides of the guide grooves 125.

[0065] Further, in specific implementation, during the recycling process of the tray 104, the servo motor 127 can drive the cam 124 to rotate. Through the guide groove 125 on the cam 124, the fixing block 126 can be guided and constrained, so that the push plate 122 can always be close to the outer periphery of the cam 124. When the cam 124 rotates, it will drive the push plate 122 to reciprocate on the telescopic guide rod 111. During this process, the push plate 122 can "clamp and center" the two sides of the tray 104 on the telescopic guide rod 111, making the tray 104 more accurate both after being exported from the unloading conveying rack and before being imported into the loading conveying rack, which is beneficial to the continuous and stable recycling work of the tray 104.

[0066] Among them, a calcium oxide production feeding process based on the regeneration of waste stone powder includes the following operation steps:

[0067] S1. Raw material pretreatment

[0068] S1.1. Crushing and screening: Recycle the stone powder and crushed stone waste remaining from marble processing, and use a crusher to crush the crushed stones into stone powder to improve the calcination efficiency;

[0069] S1.2. Cleaning and impurity removal: Wash with water to remove the surface soil and impurities, and dry or bake for later use;

[0070] S2. Kiln Selection and Preparation

[0071] S2.1 Rent Kiln 101: Contact the tile processing to select a suitable idle kiln 101, ensuring that the maximum temperature of the kiln 101 can reach over 1000 °C;

[0072] S2.2 Equipment Debugging: Check the sealing of the kiln 101, the natural gas / electric heating of the fuel system, and the temperature control instrument to ensure normal operation;

[0073] S2.3 Equipment Modification: Connect the feeding conveyor frame and the discharging conveyor frame to the head and tail of the roller frame 103. Align the mounting holes on the docking block 109 and the docking port 105, and then pass the fixing bolts through the mounting holes to fix the connection between the roller frame 103 and the feeding and discharging conveyor frames;

[0074] S3. Loading the Kiln and Calcination

[0075] S3.1 Loading Method: After both the feeding conveyor frame and the discharging conveyor frame are installed, pour the waste stone powder to be calcined into the tray 104 on the feeding conveyor frame. When loading, evenly spread the waste stone powder in the tray 104 to avoid excessive stacking with a thickness ≤ 15 cm;

[0076] S3.2 Then, the tray 104 can be conveyed to the roller frame 103 through the feeding conveyor frame, and the tray 104 is introduced into the inner side of the kiln 101 through the roller frame 103. Start the kiln 101 to calcine the waste stone powder inside the tray 104;

[0077] S3.3 Heating-up Stage: Slowly heat up to 900 - 1000 °C at a rate of 100 °C per hour to prevent cracking caused by thermal stress;

[0078] S3.4 Isothermal Calcination: Maintain the target temperature for 4 hours to ensure complete decomposition of calcium carbonate;

[0079] S3.5 Cooling Treatment: Turn off the heat source and let the kiln 101 cool naturally to below 200 °C before discharging to prevent calcium oxide from absorbing moisture when encountering water;

[0080] S4. Post-treatment and Storage

[0081] S4.1 Discharging and Screening: Place an aggregate box at the end of the discharging conveyor frame. Then, when the tray 104 is flipped through the discharging conveyor frame, pour the produced calcium oxide into the aggregate box;

[0082] S4.2 Sealed Storage: Load the calcium oxide into a moisture-proof and sealed container and place it in a dry environment to avoid reacting with air and moisture to form calcium hydroxide;

[0083] S5. Environmental Protection and Safety Measures

[0084] S5.1, Exhaust gas treatment: Use a carbon dioxide collection device to collect the decomposed carbon dioxide, reduce direct emissions, and retain and reuse the carbon dioxide.

[0085] S5.2, Dust control: Use a bag filter in the crushing and discharging processes, and operators wear N95 dust masks.

[0086] S5.3, Personal protection: Wear heat-insulating gloves, goggles, and fireproof clothing, and set up a ventilation system in the area of furnace 101.

[0087] Working principle:

[0088] In actual use, people can connect the feeding and discharging conveying frames at the head and tail with the roller frame 103. Through the traveling frame 106, it is convenient for people to move the feeding and discharging conveying frames. When connecting, first move the feeding and discharging conveying frames so that the docking block 109 can be inserted into the docking port 105, align the mounting holes on the docking block 109 and the docking port 105, and then pass the fixing bolts through the mounting holes, so as to realize the connection and fixation of the roller frame 103 and the feeding and discharging conveying frames. After the feeding and discharging conveying frames are all installed, people can introduce the waste stone powder to be calcined into the tray 104 on the feeding conveying frame. Then, through the feeding conveying frame, the tray 104 can be conveyed to the roller frame 103. Through the roller frame 103, the tray 104 can be introduced into the inner side of the kiln 101. By starting the kiln 101, the waste stone powder inside the tray 104 can be calcined, so that the waste stone powder will decompose from calcium carbonate into calcium oxide and carbon dioxide. The carbon dioxide will be centrally exported by the set extraction device, while the calcium oxide will remain inside the tray 104. After the calcination is completed, the tray 104 will be guided to the discharging conveying frame under the conveyance of the roller frame 103. When the tray 104 is conveyed to the end of the discharging conveying frame, the fixed columns 112 on both sides of the tray 104 will enter the inner side of the guide frame 113. At this time, under the drive of the guide roller 110 at the end, the clamping column 114 at the end of the connecting rod 117 will snap into the bayonet inside the end of the fixed column 112. Then, when the guide roller 110 rotates further, the fixed column 112 and the tray 104 will be driven by the fixing ring 131, the connecting rod 117 and the clamping column 114 to be flipped, so as to unload the calcium oxide inside the tray 104, and the calcium oxide can be introduced into the aggregate box, which is beneficial to actual use. The tray 104 can be guided and flipped through the through slot 130. During this process, when the fixed column 112 is guided to the conical groove 139, the spring buckle 140 on the fixed column 112 will directly pop out and snap into the conical groove 139 to pause the flipping process of the tray 104, so that the calcium oxide inside the tray 104 will be more thoroughly poured into the aggregate box under the action of inertia. Then, under the continuous rotation of the guide roller 110, the spring buckle 140 will be pressed back into the fixed column 112 under the action of the inclined groove on the side of the conical groove 139, so that the tray 104 can be continuously flipped. Through multiple groups of conical grooves 139, multi-point pauses of the tray 104 can be realized, so as to completely unload the calcium oxide inside the tray 104. When the calcium oxide inside the tray 104 is completely unloaded, the connecting rod 117 and the clamping column 114 will further drive the tray 104 to be flipped. The driving bevel gear 132 at the end of the guide roller 110 will drive the driven bevel gear 133 meshing with it to rotate. Through the driven bevel gear 133, the rotating rod 135 fixed to it will be driven to rotate. When the rotating rod 135 rotates, it will drive the rotating shaft 136 to rotate synchronously by means of the transmission assembly 134. Through the rotating shaft 136, the incomplete gear 119 can be driven to rotate.When the incomplete gear 119 rotates, it drives the telescopic guide rod 111 to move by means of the tooth grooves 120 meshing with it, so that the return spring 138 is compressed. At this time, the telescopic guide rod 111 is driven to contract, enabling the tray 104 to be completely turned over. When the tray 104 is completely turned over with the opening facing downwards, the incomplete gear 119 has rotated to the toothless part at this time, causing the telescopic guide rod 111 to lose its limit. Under the action of the return spring 138, the telescopic guide rod 111 will pop out to support the end of the tray 104. At the same time, the limiting ring 115 on the clamping post 114 will encounter the protrusion on the guide rail 129, causing the top spring 116 to be compressed, and the clamping post 114 will withdraw from the end of the fixed post 112. When the tray 104 is completely turned over, the top of the tray 104 will contact the conveying rollers on the guide roller 110 and the roller frame 103. At this time, under the action of friction, the tray 104 will be guided back to the loading conveying rack, and the loading conveying rack can turn over the guided tray 104 to make it return to the top of the loading conveying rack, thereby completing the recycling of the tray 104, which is beneficial to actual use. During the recycling process of the tray 104, the servo motor 127 can drive the cam 124 to rotate. The guide groove 125 on the cam 124 can guide and restrict the fixed block 126, enabling the push plate 122 to always closely adhere to the outer circumference of the cam 124. When the cam 124 rotates, it drives the push plate 122 to reciprocate on the telescopic guide rod 111. During this process, the push plate 122 can "clamp and center" both sides of the tray 104 on the telescopic guide rod 111, making the tray 104 more accurate both after being exported from the unloading conveying rack and before being imported into the loading conveying rack, which is beneficial to the continuous and stable recycling operation of the tray 104.,

[0089] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A feeding device for calcium oxide production based on the regeneration of waste stone powder, comprising a roller hearth kiln (1), characterized in that: The roller hearth kiln (1) includes a kiln furnace (101). Inside the lower part of the kiln furnace (101), a roller rack (103) is provided. On both sides of the upper part of the roller rack (103), docking ports (105) are formed. On both sides inside the roller rack (103), uniformly distributed fixed guide rods (121) are installed. The inlet end of the roller hearth kiln (1) is connected to a feeding conveyor rack, and the outlet end of the roller hearth kiln (1) is connected to a discharging conveyor rack. Pallets (104) are provided on the upper parts of the roller rack (103), the feeding conveyor rack, and the discharging conveyor rack. In the middle of both ends of the pallet (104), fixed columns (112) are fixedly connected, and bayonets are formed at the ends of the fixed columns (112). The kiln furnace (101) is used for calcining and decomposing waste stone powder; The feeding conveyor rack is used for feeding and conveying the pallet (104) and waste stone powder; The discharging conveyor rack is used for discharging and dumping the calcium oxide formed on the pallet (104). The main parts of the loading conveyor rack and the unloading conveyor rack are mirror - set. Both the loading conveyor rack and the unloading conveyor rack include a top rack (102). A walking rack (106) is installed at the bottom of each top rack (102). A plurality of guide rollers (110) are arranged inside the upper part of each top rack (102). Motors are connected to the ends of the outermost guide rollers (110). Docking blocks (109) are fixedly connected to both sides of a part of the top rack (102) close to the roller rack (103). The docking blocks (109) are engaged inside the docking openings (105). The roller rack (103) and the docking blocks (109) are connected by fixing bolts. Fixing rings (131) are fixedly connected to both ends of the outer periphery of the outermost guide rollers (110). Connecting rods (117) are fixedly connected to the tops of the fixing rings (131). The ends of the connecting rods (117) are slidably connected with clamping columns (114). The clamping columns (114) correspond to the bayonets at the ends of the fixing columns (112). Guide frames (113) are installed at the inner ends of the top racks (102). Guide rails (129) are fixedly connected to one ends of the guide frames (113) close to the top racks (102). The guide rails (129) are slidably connected with the limiting rings (115). A protruding part is arranged on one side of each guide rail (129). Through - slots (130) are formed on the sides of the guide frames (113) far from the trays (104). The clamping columns (114) are arranged inside the through - slots (130). A plurality of spring clips (140) are arranged in the middle of the outer peripheries of the fixing columns (112). A plurality of tapered grooves (139) are formed inside the guide frames (113). Limiting rings (115) are fixedly connected to one sides of the outer peripheries of the clamping columns (114). Top springs (116) are arranged on the sides of the limiting rings (115) far from the clamping columns (114). The top springs (116) are sleeved on the outer ends of the connecting rods (117). After calcination, the tray (104) will be guided onto the unloading conveyor rack under the transportation of the roller rack (103). When the tray (104) is transported to the end of the unloading conveyor rack, the fixing columns (112) on both sides of the tray (104) will enter the inside of the guide frame (113). At this time, driven by the guide roller (110) at the end, the clamping column (114) at the end of the connecting rod (117) will be clamped into the bayonet at the end of the fixing column (112). Then, when the guide roller (110) rotates further, the fixing column (112) and the tray (104) will be driven to flip by the fixing ring (131), the connecting rod (117) and the clamping column (114). When the tray (104) is completely flipped with the opening facing downwards, the limiting ring (115) on the clamping column (114) will encounter the protruding part on the guide rail (129), so that the top spring (116) will be compressed, and the clamping column (114) will withdraw from the end of the fixing column (112).

2. The feeding device for calcium oxide production based on the rebirth of waste stone powder according to claim 1, characterized in that: On both sides inside the top frame (102), reserved slots (118) are provided, and the reserved slots (118) correspond to the connecting rods (117).

3. The feeding device for calcium oxide production based on the regeneration of waste stone powder according to claim 1, characterized in that: On both sides of the outermost guide roller (110), driving bevel gears (132) are fixedly connected. Below the driving bevel gears (132), driven bevel gears (133) are meshed. In the middle of the driven bevel gears (133), rotating rods (135) are fixedly connected. On one side of the lower part of the outer circumference of the rotating rods (135), rotating shafts (136) are connected through transmission components (134). The rotating rods (135) and the rotating shafts (136) are both rotatably connected inside the top frame (102).

4. The feeding device for calcium oxide production based on the regeneration of waste stone powder according to claim 3, wherein: On both lower sides of the top frame (102), fixed shells (107) are fixedly connected. The top frame (102) and both sides of the fixed shells (107) are penetrated by telescopic guide rods (111). The telescopic guide rods (111) are slidably connected to the top frame (102). On one side of the outer circumference of the telescopic guide rods (111), limiting slots (137) are provided. The fixed shells (107) are partially slidably connected to the limiting slots (137). Inside the limiting slots (137), return springs (138) are sleeved. The return springs (138) are both arranged inside the fixed shells (107). On the middle part of the outer circumference of one side of the telescopic guide rods (111), tooth grooves (120) are provided. On the lower part of the outer circumference of the rotating shafts (136), incomplete gears (119) are fixedly connected. One side of the incomplete gears (119) is meshed with the tooth grooves (120).

5. The feeding device for calcium oxide production based on the regeneration of waste stone powder according to claim 4, wherein: The ends of the telescopic guide rods (111) are penetrated by push plates (122). In the middle of the side of the push plates (122) close to the top frame (102), fixing blocks (126) are fixedly connected. At the bottom of the fixing blocks (126), sliding columns (123) are fixedly connected. On the side of the push plates (122) close to the top frame (102), mounting frames (128) are provided. The mounting frames (128) are fixedly connected to one side of the top frame (102). At the top of the mounting frames (128), servo motors (127) are mounted. The driving ends of the servo motors (127) are fixedly connected with cams (124). On the top of the cams (124), guide grooves (125) are provided. The ends of the sliding columns (123) are slidably connected inside the guide grooves (125).

6. A calcium oxide production feeding process based on the rebirth of waste stone powder, applied to a calcium oxide production feeding device based on the rebirth of waste stone powder according to any one of claims 1-5, characterized in that: Including the following operation steps: S1. Raw material pretreatment S1.

1. Crushing and screening: Recycle the stone powder and crushed stone waste remaining from marble processing, and use a crusher to crush the crushed stones into stone powder to improve the calcination efficiency; S1.

2. Cleaning and impurity removal: Wash with water to remove the surface soil and impurities, and dry or bake for standby; S2. Kiln selection and preparation S2.

1. Rent a kiln (101): Contact the tile processing to select a suitable idle kiln (101) to ensure that the maximum temperature of the kiln (101) can reach above 1000 °C; S2.

2. Equipment debugging: Check the sealing performance, fuel system and temperature control instrument of the kiln (101) to ensure normal operation; S2.3, Equipment Modification: Connect the feeding conveyor frame and the discharging conveyor frame to the head and tail of the roller frame (103). Align the mounting holes on the docking block (109) and the docking port (105), and then pass the fixing bolts through the mounting holes to fix the connection between the roller frame (103) and the feeding and discharging conveyor frames; S3, Loading into the Kiln and Calcination S3.1, Loading Method: After both the feeding conveyor frame and the discharging conveyor frame are installed, pour the waste stone powder to be calcined into the tray (104) on the feeding conveyor frame. When loading, evenly spread the waste stone powder in the tray (104) to avoid excessive stacking; S3.2, Then, the tray (104) can be conveyed to the roller frame (103) through the feeding conveyor frame, and the tray (104) is introduced into the inner side of the kiln furnace (101) through the roller frame (103). Start the kiln furnace (101) to calcine the waste stone powder inside the tray (104); S3.3, Heating-up Stage: Slowly heat up to 900 - 1000 °C at a rate of 50 - 100 °C per hour to prevent cracking caused by thermal stress; S3.4, Isothermal Calcination: Maintain the target temperature for 4 - 8 hours to ensure complete decomposition of calcium carbonate; S3.5, Cooling Treatment: Turn off the heat source and let the kiln furnace (101) cool naturally to below 200 °C before discharging to prevent calcium oxide from absorbing moisture when encountering water; S4, Post-treatment and Storage S4.1, Discharging and Screening: Place an aggregate box at the end of the discharging conveyor frame. Then, when the tray (104) is flipped through the discharging conveyor frame, pour the produced calcium oxide into the aggregate box; S4.2, Sealed Storage: Load the calcium oxide into a moisture-proof and sealed container and place it in a dry environment to avoid reacting with air moisture to form calcium hydroxide; S5, Environmental Protection and Safety Measures S5.1, Exhaust Gas Treatment: Use a carbon dioxide collection device to collect the decomposed carbon dioxide, reduce direct emissions, and retain and reuse the carbon dioxide; S5.2, Dust Control: Use a bag filter in the crushing and discharging processes, and operators wear N95 dust masks; S5.3, Personal Protection: Wear heat-insulating gloves, goggles, and fire-proof clothing, and set up a ventilation system in the area of the kiln furnace (101).

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