A gas hot air device for deep processing

Abstract

This application relates to a gas-fired hot air device for deep processing, specifically a gas-fired hot air furnace. The device includes a shell and a waste heat recovery unit. High-temperature flue gas is generated through gas combustion. After heat exchange via a return pipe and heat dissipation fins, clean hot air is delivered by a fan into a heating chamber to preheat the materials. Simultaneously, the waste heat recovery unit performs staged recovery of the flue gas waste heat. A first recovery component uses a portion of the flue gas to preheat combustion air and recirculates it back into the furnace. A second recovery component transfers the heat from the flue gas to the bottom of the material box. A stirring heating component drives a hollow stirring frame to rotate and vibrate, ensuring uniform heating of the materials. This application features high thermal energy utilization, uniform heating, intelligent control, and energy saving and environmental protection.

Description

Technical Field

[0001] This application relates to the technical field of gas-fired hot air furnaces, and in particular to a gas-fired hot air device for deep processing. Background Technology

[0002] Currently, in the deep processing of materials, equipment such as electric heating, coal-fired hot blast stoves, biomass hot blast stoves, or gas-fired hot blast stoves are commonly used to provide hot air. An existing hot blast stove structure with a combustion chamber (application number CN202221645327.0) exchanges heat through a heat exchange device within the furnace. However, the high-temperature flue gas fails to burn completely upon discharge, generating a large amount of harmful gases and wasting energy. Furthermore, the flue gas path within the hot blast stove is relatively short, resulting in insufficient heat exchange between the flue gas and air, causing the discharged flue gas to still contain a significant amount of residual heat, further exacerbating energy loss. In addition, existing hot blast stoves generally suffer from the following shortcomings: 1. Uneven distribution of hot air in the heating chamber leads to uneven heating of the material, which can easily cause local overheating or incomplete heating, affecting the quality of the finished product. Second, the waste heat of the flue gas after heat exchange is directly discharged, resulting in low thermal energy utilization. Third, it is difficult to intelligently adjust the hot air temperature and flow rate according to the different requirements of material heating at different stages.

[0003] Regarding the aforementioned technologies, existing gas-fired hot air devices generally suffer from incomplete flue gas combustion, incomplete waste heat recovery, poor heating uniformity, lack of intelligent control functions, and low thermal energy utilization, making it difficult to meet the high-quality and low-energy consumption requirements of deep material processing heating processes.

[0004] Therefore, there is an urgent need to develop a new type of gas-fired hot air device that can achieve complete combustion of flue gas and multi-stage waste heat recovery, has intelligent diversion and control functions, and can make materials heat evenly through vibration and stirring, so as to improve the heating quality of materials and energy utilization efficiency. Summary of the Invention

[0005] The purpose of this application is to provide a gas-fired hot air device for deep processing to solve the problems in the prior art.

[0006] This application provides a gas-fired hot air device for deep processing, which adopts the following technical solution: It includes a shell, an air inlet at the upper left end of the shell, a bracket fixed at the bottom of the shell, a burner installed on the left side of the shell with a gas inlet pipe connected to the burner's air inlet end, a furnace inside the shell with a refractory layer installed on the inner wall of the furnace, return pipes connected to the upper and lower sides of the furnace, and heat dissipation fins installed on the right side of the furnace. A fan is installed on the right side inside the shell, and the fan is installed inside the air outlet, which is located on the right side inside the shell. A heating box is connected to the right side of the shell, and a controller is installed on the front side of the heating box. It also includes a waste heat utilization device located at the upper end of the shell.

[0007] By adopting the above technical solution, the gas is burned in the furnace, and the hot flue gas is heat-exchanged through the return pipe and heat dissipation fins. The clean hot air is sent into the heating box through the air outlet by the fan. The waste heat utilization device recovers the waste heat of the flue gas in stages. The first recovery component also re-introduces part of the high-temperature flue gas into the furnace for circulation heating through the pipe. The overall structure is compact and the heating efficiency is high.

[0008] Preferably, the waste heat utilization device includes a diversion drive assembly, which is connected to the upper end of the outer shell. The bottom of the diversion drive assembly is connected to an exhaust pipe, and the bottom of the exhaust pipe is connected to the exhaust end of the return pipe. A first recovery assembly and a second recovery assembly are respectively provided on the left and right sides of the diversion drive assembly. The second recovery assembly extends into the heating box, and the upper end of the second recovery assembly is connected to a stirring heating assembly.

[0009] By adopting the above technical solution, the exhaust pipe introduces the flue gas discharged from the return pipe into the diversion drive component. The diversion drive component distributes the flue gas to the first recovery component and the second recovery component as needed. The first recovery component moves up and down along the transmission pipe through the sleeve, blowing the high-temperature flue gas over a wide area to the outer wall of the transmission pipe, thereby achieving uniform preheating of the incoming air. At the same time, some of the flue gas is re-entered into the furnace through the pipe body for circulating heating. The second recovery component sends the waste heat into the heating box. The stirring rack is hollow and allows high-temperature flue gas to pass through, achieving synchronous rotation and heating. It also works with the stirring heating component to improve the heating uniformity, realizing multi-stage utilization of the waste heat of the flue gas.

[0010] Preferably, the diversion drive assembly includes a first housing, which is connected to the upper end of the exhaust pipe. A three-way pipe is installed at the bottom of the first housing, and the bottom of the three-way pipe is connected to the exhaust pipe. A diversion plate is rotatably installed in the middle of the three-way pipe. The upper end of the diversion plate is connected to the connecting frame. A slide is locked at the upper end of the connecting frame. The slide is slidably connected to the upper end of the first housing. A motor is provided at the top of the slide. A first bevel gear is connected to the bottom output end of the motor. A second bevel gear and a third bevel gear are respectively provided on the left and right sides of the first bevel gear. The second bevel gear and the third bevel gear are respectively connected to the first recovery assembly and the stirring and heating assembly.

[0011] By adopting the above technical solution, when the diverter plate rotates to switch channels, it pushes the connecting frame to drive the slide block to slide laterally along the upper end of the first housing, so that the motor installed on the top of the slide block moves accordingly, thereby achieving selective meshing of the first bevel gear with the second bevel gear or the third bevel gear, thereby switching the operation of the first recovery component and the stirring heating component, controlling the distribution of flue gas to both sides, and realizing intelligent adjustment of waste heat recovery.

[0012] Preferably, the first recycling component includes a first transmission rod, one end of which is connected to a second bevel gear, and the other end of which passes through the side of the second housing and is connected to a first bevel gear set. The first bevel gear set is connected to the outside of a transmission pipe, and the transmission pipe is vertically connected to the inside of the second housing. The bottom of the transmission pipe is connected to an air inlet. A rotating rod is connected to the left side of the first bevel gear set. A cam is installed in the middle of the rotating rod, and connecting plates are installed on both sides of the rotating rod. The tops of the connecting plates on both sides are locked to the inside of the second housing. A roller is abutted against the bottom of the cam, and the roller is installed on the upper end of a movable bracket. The left and right sides of the movable bracket are connected to the connecting plates, and tension springs are connected between the movable bracket and the connecting plates on both sides. A docking frame is locked at the bottom of the movable bracket, and a sleeve is provided at the upper right end of the docking frame. The sleeve is fitted onto the outside of the transmission pipe, and a metal hose is docked to the right side of the sleeve. The right side of the metal hose is connected to the first recycling pipe, and the metal hose is connected to the left side of a three-way pipe.

[0013] By adopting the above technical solution, the second bevel gear drives the first transmission rod, which in turn drives the rotating rod to rotate via the first bevel gear set. Simultaneously, the first bevel gear set drives the transmission pipe to rotate, and the cam periodically presses down on the roller, causing the moving bracket to drive the sleeve to move up and down along the transmission pipe. This changes the position of the metal hose and the first recovery pipe, allowing the flue gas to be blown to the outside of the transmission pipe over a large area, improving the preheating effect of the transmission pipe on the incoming air. Furthermore, the lower left side of the second housing is connected to the outer shell via a pipe, allowing some of the high-temperature flue gas to be reintroduced into the furnace for circulating heating, further improving the thermal energy utilization rate.

[0014] Preferably, the second recycling component includes a second recycling pipe, which is connected to the right side of the tee pipe. The lower right end of the second recycling pipe is extended and connected to a third recycling pipe. The bottom of the third recycling pipe is connected to a collection box. The top of the collection box is abutted against a heat-concentrating plate. The heat-concentrating plate is installed at the bottom of the material box, and the material box is installed at the top of the collection box. Flexible frames are provided on both sides of the bottom of the collection box.

[0015] By adopting the above technical solution, the flue gas enters the second recovery pipe through the right side of the three-way pipe, and then enters the collection box through the third recovery pipe. The heat-concentrating plate transfers heat to the bottom of the material box to assist in heating the material in the material box. The stirring frame is hollow inside, and the high-temperature flue gas enters the stirring frame through the air inlet hood to achieve stirring and heating. The elastic frame provides rebound and support for subsequent vibration, realizing the direct utilization of the waste heat of the flue gas.

[0016] Preferably, the stirring heating assembly includes a third housing located at the top of the heating chamber. A second transmission rod is connected inside the third housing. One end of the second transmission rod is connected to a third bevel gear, and a second bevel gear set is provided outside the other end of the second transmission rod. A stirring structure is connected to the bottom of the second bevel gear set. The stirring structure extends into the heating chamber, and the bottom of the stirring structure is connected to the material box.

[0017] By adopting the above technical solution, the third bevel gear drives the second transmission rod, which in turn drives the stirring structure to move through the second bevel gear set. The stirring structure extends into the heating box and connects with the material box. Furthermore, the inclined setting of the connecting shaft and the push block and pull frame drive the material box to generate reciprocating vibration, which turns the material over while heating with residual heat, avoiding local overheating and improving heating uniformity.

[0018] Preferably, the agitation structure includes a first rotating component, which is connected to the bottom of the second bevel gear set. The lower end of the first rotating component is connected to a connecting shaft, which is inserted into the interior of a connecting block. Stabilizing plates are installed on both the front and rear sides of the connecting block. Locking rods are inserted into the interior of the upper and lower sides of the stabilizing plates, and side plates are locked on both sides of the locking rods. The bottom of the connecting shaft is connected to a second rotating component, and a rotating shaft is installed at the bottom of the second rotating component. The rotating shaft is vertically limited and connected to the interior of the connecting pipe. The connecting pipe is vertically connected to the upper end of the agitator. The agitator is rotatably installed in the middle of the material box. An air inlet hood is connected to the bottom of the agitator. A push block is connected to the side plate through a shaft, and a pulling frame is connected to the outside of the push block. The pulling frame is fixed to both sides of the upper end of the material box.

[0019] By adopting the above technical solution, the second bevel gear set drives the first rotating component, which in turn drives the rotating shaft to rotate inside the connecting pipe via the connecting shaft and the second rotating component, thereby driving the stirring frame to rotate. At the same time, the push block and the pull frame drive the material box to generate reciprocating vibration, so that the material is in full contact with the heated stirring frame, significantly improving the heating effect.

[0020] Preferably, the top of the diverter plate is integrally provided with a long strip plate, and the end of the long strip plate at the top of the diverter plate is connected to the middle of the lower end of the connecting frame via a shaft.

[0021] By adopting the above technical solution, the connecting frame can accurately drive the diverter plate to rotate when the slide moves horizontally. The structure is simple, the transmission is reliable, and the precise control of flue gas distribution is guaranteed.

[0022] Preferably, the connecting plate and the tension spring are symmetrically arranged on the left and right sides of the movable bracket, and the upper left and right sides of the movable bracket are telescopically combined with the connecting plate.

[0023] By adopting the above technical solution, the movable support moves smoothly up and down under the action of the cam and tension spring, ensuring the smooth sliding of the sleeve along the transmission pipe and improving the stability of the flue gas preheating process.

[0024] Preferably, the connecting shaft is inserted obliquely into the connecting block, and the stabilizing plates at the front and rear of the connecting block are symmetrically connected with locking rods.

[0025] By adopting the above technical solution, a stable transmission joint is formed, which converts the rotational motion of the first rotating component into the rotational motion of the second rotating component, thereby enhancing the transmission effect of the structure.

[0026] Preferably, limit strips are integrally fixed on both the left and right sides of the rotating shaft, and the rotating shaft is vertically limited and connected to the connecting pipe through the limit strips on both sides.

[0027] By adopting the above technical solution, the rotating shaft can not only drive the connecting pipe to rotate, but also meet the subsequent up and down sliding effect, ensuring that the stirring frame and the rotating shaft rotate synchronously, while allowing small axial displacement caused by vibration to avoid jamming.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. This application, by setting up an outer shell, air inlet, burner, furnace, return pipe, heat dissipation fins, fan, air outlet, heating box and controller, achieves the following: the gas is fully combusted in the furnace, the high-temperature flue gas flows along the return pipe and exchanges heat with the heat dissipation fins, and the external cold air is heated into clean hot air, which is sent into the heating box by the fan to achieve the initial heating of the material. This structure is compact, has high heat exchange efficiency, and provides a stable heat source for subsequent waste heat recovery.

[0029] 2. This application sets up a waste heat utilization device, in which the flue gas after heat exchange enters the diversion drive component through the exhaust pipe and is distributed to the first recovery component and the second recovery component as needed. The first recovery component preheats the combustion air and partially returns it to the furnace for circulation. The second recovery component directly heats the bottom of the material box. The stirring heating component realizes rotation, stirring and vibration. This device realizes multi-stage utilization of flue gas waste heat and significantly reduces energy consumption.

[0030] 3. This application sets up a diversion drive component, that is, when the diversion plate rotates to switch channels, it pushes the connecting frame and the slide to slide laterally along the upper end of the first housing, so that the motor follows, realizing the selective meshing of the first bevel gear with the second bevel gear or the third bevel gear. At the same time, the rotation of the diversion plate precisely controls the distribution of flue gas to the first recovery component or the second recovery component, and intelligently switches the flue gas flow direction according to different stages of material heating, so as to realize the automatic adjustment of waste heat recovery.

[0031] 4. This application sets up a first recovery component, namely, the second bevel gear drives the first transmission rod, which in turn drives the rotating rod and the transmission pipe to rotate via the first bevel gear set. The cam periodically presses down on the roller, causing the sleeve to move up and down along the transmission pipe, blowing high-temperature flue gas over a wide area to the outer wall of the transmission pipe, preheating the cold air entering from the air inlet. At the same time, the lower end of the second box is connected to the outer shell through the pipe, and part of the flue gas is recycled back to the furnace, which greatly improves the combustion efficiency.

[0032] 5. This application sets up a second recovery component, in which flue gas enters the second recovery pipe through the right side of the three-way pipe, and then enters the collection box through the third recovery pipe. The high-temperature flue gas heats the heat-gathering plate, and the heat-gathering plate transfers heat to the bottom of the material box to assist in heating the material. The elastic frame provides reset support for subsequent vibration. It directly utilizes the waste heat of the flue gas for contact heating, reduces heat loss, and improves heating efficiency.

[0033] 6. This application sets up a stirring heating component, namely, a third bevel gear drives a second transmission rod, which in turn drives the stirring structure to move via the second bevel gear set. The stirring structure extends into the heating box and connects with the material box. Through the inclined setting of the connecting shaft and the push block and pull frame, the material box is driven to generate reciprocating vibration. At the same time, the stirring frame rotates and turns the material. This component realizes vibration and rotation stirring while heating with residual heat, avoiding local overheating and ensuring heating uniformity.

[0034] 7. This application sets up a stirring structure, namely, the second bevel gear set drives the first rotating component, and the inclined connecting shaft and the second rotating component drive the rotating shaft to rotate. The rotating shaft drives the connecting pipe and the stirring frame to rotate through the limit strip. The stirring frame is hollow inside, and high-temperature flue gas enters through the air inlet hood to achieve heating. At the same time, the push block swings back and forth to make the pulling frame intermittently lift, and the elastic frame drives the material box to vibrate up and down, so that the material is in full contact with the heated stirring frame and the heat collection plate, which significantly improves the heating quality. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a frontal view of the internal structure diagram of this application; Figure 3 This is a frontal view of the internal structure of the waste heat utilization device of this application; Figure 4This is a front view of the internal structure of the shunt driver component in this application; Figure 5 This is a frontal view of the internal structure of the first recycling component of this application; Figure 6 This is a front view of the internal structure of the second recovery component and the stirring and heating component of this application; Figure 7 This is a front view schematic diagram of the stirring structure of this application; Figure 8 This is a schematic diagram of the three-dimensional part of the stirring structure in this application; Figure 9 This is a right-side view of the stirring and heating assembly of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Outer shell; 2. Air inlet; 3. Support; 4. Burner; 5. Gas inlet pipe; 6. Furnace chamber; 7. Refractory layer; 8. Return pipe; 9. Heat dissipation fins; 10. Fan; 11. Air outlet; 12. Heating box; 13. Controller; 14. Waste heat recovery device; 141. Diverter drive assembly; 1411. First housing; 1412. T-pipe; 1413. Diverter plate; 1414. Connecting frame; 1415. 1416, Slide; 1417, Motor; 1418, First Bevel Gear; 1419, Third Bevel Gear; 142, Exhaust Pipe; 143, First Recycling Component; 1431, First Transmission Rod; 1432, Second Housing; 1433, First Bevel Gear Set; 1434, Transmission Pipe; 1435, Rotating Rod; 1436, Cam; 1437, Connecting Plate; 1438, Roller; 1439, Moving Support; 143 10. Tension spring; 14311. Connecting frame; 14312. Sleeve; 14313. Metal flexible hose; 14314. First recovery pipe; 144. Second recovery assembly; 1441. Second recovery pipe; 1442. Third recovery pipe; 1443. Collection box; 1444. Heat-concentrating plate; 1445. Material box; 1446. Elastic frame; 145. Stirring and heating assembly; 1451. Third housing; 1452. Second transmission rod; 14 53. Second bevel gear set; 1454. Agitator structure; 14541. First rotating component; 14542. Connecting shaft; 14543. Connecting block; 14544. Stabilizing plate; 14545. Locking rod; 14546. Side plate; 14547. Second rotating component; 14548. Rotating shaft; 14549. Connecting pipe; 145410. Agitator frame; 145411. Air intake hood; 145412. Push block; 145413. Pulling frame. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1 -Appendix Figure 9 This application will be described in further detail below.

[0038] A gas-fired hot air device for deep processing, referring to Figures 1-2 The device includes an outer shell 1, an air inlet 2 at the upper left end of the outer shell 1, a bracket 3 fixed at the bottom of the outer shell 1, a burner 4 installed on the left side of the outer shell 1, and a gas inlet pipe 5 connected to the air inlet end of the burner 4. The outer shell 1 contains a furnace 6, and a refractory layer 7 is installed on the inner wall of the furnace 6. The upper and lower sides of the furnace 6 are connected to return pipes 8 in the shape of curved tubes, and the exhaust ends of the two return pipes 8 are connected in series. The right side of the furnace 6 is equipped with heat dissipation fins 9. The right side of the outer shell 1 contains a fan 10, which is installed inside the air outlet 11. The air outlet 11 is located on the right side of the outer shell 1. The right side of the outer shell 1 is connected to a heating box 12. The front of the heating box 12 is an openable door, and the top of the heating box 12 is equipped with an electric window for the rapid discharge of hot air after the material is heated. A controller 13 is installed on the outside of the front door of the heating box 12. The device also includes a waste heat utilization device 14 located at the upper end of the outer shell 1.

[0039] Specifically, the gas is burned in the furnace 6, and the hot flue gas is heat-exchanged through the return pipe 8 and the heat dissipation fins 9. The clean hot air is sent into the heating box 12 by the fan 10 through the air outlet 11. The waste heat utilization device 14 recovers the waste heat of the flue gas in stages. The first recovery component 143 also re-introduces part of the high-temperature flue gas into the furnace 6 through the pipe body for circulating heating. The overall structure is compact and the heating efficiency is high.

[0040] Reference Figure 3 The waste heat recovery device 14 includes a diversion drive assembly 141, which is connected to the upper end of the outer shell 1. The bottom of the diversion drive assembly 141 is connected to an exhaust pipe 142, and the bottom of the exhaust pipe 142 is connected to the exhaust end of the return pipe 8 for recycling the hot flue gas inside the return pipe 8. A first recovery assembly 143 and a second recovery assembly 144 are respectively provided on the left and right sides of the diversion drive assembly 141. The first recovery assembly 143 is connected to the upper end of the outer shell 1, and the second recovery assembly 144 extends into the heating box 12. The upper end of the second recovery assembly 144 is connected to a stirring heating assembly 145.

[0041] Specifically, the exhaust pipe 142 introduces the flue gas discharged from the return pipe 8 into the diversion drive assembly 141. The diversion drive assembly 141 distributes the flue gas to the first recovery assembly 143 and the second recovery assembly 144 as needed. The first recovery assembly 143 moves up and down along the transmission pipe 1434 through the sleeve 14312, blowing the high-temperature flue gas over a wide area towards the outer wall of the transmission pipe 1434 to achieve uniform preheating of the incoming air. At the same time, some of the flue gas is re-entered into the furnace 6 through the pipe body for circulating heating. The second recovery assembly 144 sends the waste heat into the heating box 12. The stirring rack 145410 is hollow inside and allows high-temperature flue gas to pass through, achieving synchronous rotation and heating. It also works with the stirring heating assembly 145 to improve the heating uniformity and achieve multi-stage utilization of the waste heat of the flue gas.

[0042] Reference Figure 4 The diversion drive assembly 141 includes a first housing 1411, which is connected to the upper end of the exhaust pipe 142. A three-way pipe 1412 is installed at the bottom of the first housing 1411, and the bottom of the three-way pipe 1412 is connected to the exhaust pipe 142. A diversion plate 1413 for diverting hot flue gas is rotatably installed in the middle of the three-way pipe 1412. The upper end of the diversion plate 1413 is connected to the connecting frame 1414, and the rear side of the diversion plate 1413 is connected to the drive device. A slide 1415 is locked at the upper end of the connecting frame 1414. The upper end of the first housing 1411 is horizontally slidably connected, and the top of the slide 1415 is equipped with a motor 1416. The bottom output end of the motor 1416 is connected to a first bevel gear 1417. The left and right sides of the first bevel gear 1417 are respectively equipped with a second bevel gear 1418 and a third bevel gear 1419. The first bevel gear 1417, the second bevel gear 1418 and the third bevel gear 1419 are intermittently meshed through switching action. The second bevel gear 1418 and the third bevel gear 1419 are respectively connected to the first recycling component 143 and the stirring and heating component 145.

[0043] Specifically, when the diverter plate 1413 rotates to switch channels, it pushes the connecting frame 1414 to drive the slide block 1415 to slide laterally along the upper end of the first housing 1411, so that the motor 1416 installed on the top of the slide block 1415 moves accordingly, thereby realizing the selective meshing of the first bevel gear 1417 with the second bevel gear 1418 or the third bevel gear 1419, thereby switching the drive of the first recovery component 143 and the stirring heating component 145 to work, controlling the distribution of flue gas to both sides, and realizing intelligent adjustment of waste heat recovery.

[0044] The top of the diverter plate 1413 is integrally provided with a long strip plate, and the end of the long strip plate at the top of the diverter plate 1413 is connected to the middle of the lower end of the connecting frame 1414 via a shaft.

[0045] Specifically, when the slide 1415 moves horizontally, the connecting frame 1414 can precisely drive the diverter plate 1413 to rotate. The structure is simple, the transmission is reliable, and the precise control of flue gas distribution is guaranteed.

[0046] Reference Figure 5The first recycling component 143 includes a first transmission rod 1431. The right end of the first transmission rod 1431 is connected to the second bevel gear 1418, and the left end of the first transmission rod 1431 passes through the side of the second housing 1432 and is connected to the first bevel gear set 1433. The first bevel gear set 1433 is connected to the outer side of the upper end of the transmission pipe 1434 to realize the rotational transmission of the transmission pipe 1434. The transmission pipe 1434 is vertically connected to the inside of the second housing 1432, and the bottom of the transmission pipe 1434 is connected to the air inlet 2. The top of the transmission pipe 1434 is open for the transmission of external air. The lower left side of the second housing 1432 is connected to the outer shell 1 through a pipe to re-introduce the high-temperature flue gas into the furnace 6 for reheating. A rotating rod 1435 is horizontally connected to the left side of the first bevel gear set 1433. A cam 1436 is installed in the middle of the rotating rod 1435, and cams 1436 are installed on both the left and right sides of the rotating rod 1435. There are connecting plates 1437, and the tops of both connecting plates 1437 are locked to the inside of the second housing 1432. The bottom of the cam 1436 abuts against the roller 1438, and the roller 1438 is rotatably mounted on the upper end of the movable bracket 1439. The left and right sides of the movable bracket 1439 are connected to the connecting plates 1437, and tension springs 14310 are connected between the movable bracket 1439 and the connecting plates 1437. Through the cooperation of the tension springs 14310, the movement is satisfied. The bracket 1439 moves up and down to reset. The bottom of the movable bracket 1439 is locked with a docking frame 14311, and the upper right end of the docking frame 14311 is provided with a sleeve 14312. The sleeve 14312 is sleeved on the outside of the transmission pipe 1434, and the right side of the sleeve 14312 is connected to a metal hose 14313. The right side of the metal hose 14313 is connected to the first recycling pipe 14314, and the metal hose 14313 is connected to the left side of the three-way pipe 1412.

[0047] Specifically, the second bevel gear 1418 drives the first transmission rod 1431, which in turn drives the rotating rod 1435 to rotate via the first bevel gear set 1433. Simultaneously, the first bevel gear set 1433 drives the transmission pipe 1434 to rotate. The cam 1436 periodically presses down the roller 1438, causing the moving bracket 1439 to drive the sleeve 14312 to move up and down along the transmission pipe 1434. This changes the position of the metal hose 14313 and the first recovery pipe 14314, allowing the flue gas to be blown to the outside of the transmission pipe 1434 over a large area, improving the preheating effect of the transmission pipe 1434 on the incoming air. Furthermore, the lower left side of the second housing 1432 is connected to the outer shell 1 via a pipe, allowing some of the high-temperature flue gas to be reintroduced into the furnace 6 for circulating heating, further improving the thermal energy utilization rate.

[0048] The connecting plate 1437 and the tension spring 14310 are symmetrically arranged on the left and right sides of the movable bracket 1439, and the upper left and right sides of the movable bracket 1439 are telescopically combined with the connecting plate 1437.

[0049] Specifically, the movable support 1439 moves smoothly up and down under the action of the cam 1436 and the tension spring 14310, ensuring the smooth sliding of the sleeve 14312 along the transmission pipe 1434 and improving the stability of the flue gas preheating process.

[0050] Reference Figure 6 The second recycling component 144 includes a second recycling pipe 1441, which is connected to the right side of the three-way pipe 1412. The lower right end of the second recycling pipe 1441 is extended and connected to a third recycling pipe 1442. The bottom of the third recycling pipe 1442 is connected to a collection box 1443. The top of the collection box 1443 is abutted against a heat-gathering plate 1444 for heat gathering. The heat-gathering plate 1444 is installed at the bottom of the material box 1445, and the material box 1445 is installed at the top of the collection box 1443. Elastic frames 1446 are provided on both sides of the bottom of the collection box 1443.

[0051] Specifically, the flue gas enters the second recovery pipe 1441 through the right side of the three-way pipe 1412, and then enters the collection box 1443 through the third recovery pipe 1442. The heat-concentrating plate 1444 transfers heat to the bottom of the material box 1445 to assist in heating the material in the material box 1445. The stirring frame 145410 is hollow inside, and the high-temperature flue gas enters the stirring frame 145410 through the air inlet hood 145411 to achieve stirring and heating. The elastic frame 1446 provides rebound and support for subsequent vibration, realizing the direct utilization of the waste heat of the flue gas.

[0052] Among them, the elastic frame 1446 is composed of a frame, spring and base as in the prior art, thereby forming an elastic support structure to meet the subsequent elastic vibration effect.

[0053] The stirring heating assembly 145 includes a third housing 1451, which is located on top of the heating box 12. A second transmission rod 1452 is horizontally connected inside the third housing 1451. The left side of the second transmission rod 1452 is connected to a third bevel gear 1419, and a second bevel gear set 1453 is provided on the outside of the right side of the second transmission rod 1452. A stirring structure 1454 is connected to the bottom of the second bevel gear set 1453. The stirring structure 1454 extends into the heating box 12, and the bottom of the stirring structure 1454 is connected to the material box 1445.

[0054] Specifically, the third bevel gear 1419 drives the second transmission rod 1452, which in turn drives the stirring structure 1454 via the second bevel gear set 1453. The stirring structure 1454 extends into the heating box 12 and connects with the material box 1445. Through the inclined setting of the connecting shaft 14542 and the push block 145412 and the pulling frame 145413, the material box 1445 is driven to reciprocate and vibrate. While heating with residual heat, the material is turned over to avoid local overheating and improve the heating uniformity.

[0055] Reference Figures 7-9 The agitation structure 1454 includes a first rotating component 14541, which is connected to the bottom of the second bevel gear set 1453 and rotates synchronously with the second bevel gear set 1453. A connecting shaft 14542 is locked to the lower end of the first rotating component 14541. The connecting shaft 14542 is inserted into the connecting block 14543, and stabilizing plates 14544 are installed on both the front and rear sides of the connecting block 14543. Locking rods 14545 are horizontally inserted into the upper and lower sides of the stabilizing plates 14544, and side plates 14546 are locked to the left and right sides of the locking rods 14545. A second rotating component 14547 is connected to the bottom of the connecting shaft 14542. The unit is equipped with a rotating shaft 14548, which is vertically connected to the connecting pipe 14549. The connecting pipe 14549 is vertically connected to the upper end of the stirring frame 145410. The stirring frame 145410 is rotatably installed in the middle of the material box 1445, and the interior of the stirring frame 145410 is hollow to facilitate the entry and heating of hot flue gas. The bottom of the stirring frame 145410 is connected to an air inlet hood 145411. Push blocks 145412 are connected to the sides of the two side plates 14546 through a transverse shaft. Pulling frames 145413 are connected to the outside of the two push blocks 145412. The pulling frames 145413 are fixed to the upper two sides of the material box 1445.

[0056] Specifically, the second bevel gear set 1453 drives the first rotating component 14541, which in turn drives the rotating shaft 14548 to rotate within the connecting pipe 14549 via the connecting shaft 14542 and the second rotating component 14547. This causes the stirring frame 145410 to rotate, while the push block 145412 and the pull frame 145413 cause the material box 1445 to reciprocate and vibrate, ensuring that the material is in full contact with the heated stirring frame 145410, thus significantly improving the heating effect.

[0057] The connecting shaft 14542 is inclinedly inserted into the connecting block 14543, and the stabilizing plates 14544 provided at the front and rear of the connecting block 14543 are symmetrically connected with locking rods 14545.

[0058] Specifically, a stable transmission joint is formed, which converts the rotational motion of the first rotating component 14541 into the rotational motion of the second rotating component 14547, thereby enhancing the transmission effect of the structure.

[0059] Among them, the rotating shaft 14548 has a limit strip fixed on both the left and right sides, and the rotating shaft 14548 is vertically limited and connected to the connecting pipe 14549 through the limit strips on both sides.

[0060] Specifically, the rotating shaft 14548 can not only drive the connecting pipe 14549 to rotate, but also satisfy the subsequent up and down sliding effect, ensuring that the stirring frame 145410 rotates synchronously with the rotating shaft 14548, while allowing small axial displacement caused by vibration to avoid jamming.

[0061] The working principle of this application is as follows: First, the gas enters the burner 4 through the gas inlet pipe 5 and is fully combusted in the furnace 6 to produce high-temperature flue gas. The flue gas flows in the furnace 6, is insulated by the refractory layer 7, and passes through the return pipe 8 and heat dissipation fins 9, which are curved tubes on the upper and lower sides, for heat exchange. At this time, external air enters the shell 1 through the air inlet 2 and comes into contact with the return pipe 8 for heat exchange. The heat exchange effect is enhanced by the heat dissipation fins 9. The hot air inside the shell 1 after heat exchange is sent into the heating box 12 through the fan 10 installed at the air outlet 11 to raise the internal temperature of the heating box 12 and achieve the initial heating of the material in the material box 1445. The flue gas after heat exchange still contains a high temperature. At this time, the high-temperature flue gas enters the exhaust pipe 142 through the exhaust end of the return pipe 8, and then enters the three-way pipe 1412. When preheating of the incoming air is required, the diverter plate 1413 is rotated by the drive device, closing the right side channel of the three-way pipe 1412. In this way, the high-temperature flue gas will enter the first recovery pipe 14314 of the first recovery assembly 143 through the open left channel, and then enter the first recovery pipe 14314 of the first recovery assembly 143 along with the metal hose 143. The transmission of 13 allows high-temperature flue gas to enter the sleeve 14312. This high-temperature flue gas then heats the transmission pipe 1434, thereby preheating the air entering the outer casing 1 through the transmission pipe 1434, improving the heat exchange efficiency with the return pipe 8. Secondly, during the channel switching process of the flow divider 1413, the flow divider 1413 pushes the connecting frame 1414, causing the connecting frame 1414 to drive the slide 1415 along the first housing 1411. The upper end slides laterally, causing the motor 1416 to move accordingly, enabling selective meshing of the first bevel gear 1417 with either the second bevel gear 1418 or the third bevel gear 1419. When the left channel is in a flowing state, the first bevel gear 1417 meshes with the second bevel gear 1418, cooperating with the motor 1416 to drive the first transmission rod 1431. At this time, the first transmission rod 1431 drives the first bevel gear set 1433, thereby driving the transmission pipe 1434 to rotate, while the rotating rod 14... 35 drives the cam 1436 to rotate, and the cam 1436 periodically presses down the roller 1438, causing the moving bracket 1439 to move downward against the tension of the tension spring 14310. This causes the sleeve 14312 and the metal hose 14313 to move up and down along the transmission pipe 1434, blowing the high-temperature flue gas over a wide area towards the outer wall of the transmission pipe 1434. The cold air flowing into the transmission pipe 1434 through the air inlet 2 undergoes indirect heat exchange through the pipe wall, thereby preheating the combustion air and improving combustion efficiency. When the diversion plate 1413 closes the left channel and opens the right channel, the high-temperature flue gas enters the collection box 1443 through the second recovery pipe 1441 and the third recovery pipe 1442. The high-temperature flue gas entering the collection box 1443 can heat the heat-concentrating plate 1444, so that the heat-concentrating plate 1444 can transfer heat to the bottom of the material box 1445 to assist in heating the material in the box. The waste heat of the flue gas is directly used for contact heating, reducing heat loss. Furthermore, during the opening and closing of the right-side channel, the first bevel gear 1417 meshes with the third bevel gear 1419. The third bevel gear 1419 drives the first rotating component 14541 to rotate via the second transmission rod 1452 and the second bevel gear set 1453. The motion is transmitted to the rotating shaft 14548 via the inclined connecting shaft 14542, the connecting block 14543, and the second rotating component 14547. The rotating shaft 14548 drives the connecting pipe 14549 and the stirring frame 145410 to rotate via the limiting strip. The stirring frame 145410 rotates inside the material box 1445. Next, the high-temperature flue gas entering the collection box 1443 will enter the stirring frame 145410 through the air inlet hood 145411, thereby achieving agitation. The heating of the frame 145410 not only satisfies the material stirring, but also works in conjunction with the heating effect to achieve a combination of stirring and heating, thereby improving the overall heating efficiency of the material. At the same time, due to the inclined setting of the connecting shaft 14542 and the transmission of the stabilizing plate 14544, locking rod 14545, and side plate 14546, the push block 145412 will swing back and forth to achieve the intermittent lifting of the pull frame 145413. In this way, in conjunction with the elastic frame 1446 installed at the bottom of the material box 1445, the material box 1445 will be driven to vibrate up and down. The combination of vibration and rotational stirring ensures that the material is in full contact with the heated stirring frame 145410 and the bottom heat-concentrating plate 1444, so that the material is heated evenly and local overheating or scorching is avoided. The controller 13 controls the movement of the motor 1416 and the angle of the diverter 1413 to switch the direction of flue gas flow. In the constant rate heating stage, the high temperature flue gas is preferentially allocated to the second recovery component 144 and the stirring heating component 145 to enhance the direct heating and turning of the material. In the decreasing rate heating stage, the flue gas is preferentially allocated to the first recovery component 143 to enhance air preheating and reduce energy consumption. The two modes can be operated alternately or proportionally to realize the cascade utilization of thermal energy and intelligent control of the heating process.

[0062] This application provides a gas-fired hot air device for deep processing, comprising a shell 1 and a waste heat recovery device 14. High-temperature flue gas is generated by gas combustion, and after heat exchange through a return pipe 8 and heat dissipation fins 9, clean hot air is sent by a fan 10 into a heating chamber 12 to preheat the materials. Simultaneously, the waste heat recovery device 14 performs graded recovery of the flue gas waste heat. A first recovery component 143 uses part of the flue gas to preheat the combustion air and recirculates it back into the furnace. A second recovery component 144 transfers the heat from the flue gas to the bottom of the material box 1445. The stirring heating component 145 drives the hollow stirring frame 145410 to rotate and vibrate, ensuring uniform heating of the materials. This application features high thermal energy utilization, uniform heating, intelligent control, and energy saving and environmental protection.

[0063] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas-fired hot air device for deep processing includes a shell (1), an air inlet (2) at the upper left end of the shell (1), a bracket (3) fixed at the bottom of the shell (1), a burner (4) installed on the left side of the shell (1), and a gas inlet pipe (5) connected to the air inlet end of the burner (4), a furnace (6) inside the shell (1), and a refractory layer (7) installed on the inner wall of the furnace (6), return pipes (8) connected to the upper and lower sides of the furnace (6), and heat dissipation fins (9) installed on the right side of the furnace (6), a fan (10) installed on the right side inside the shell (1), and the fan (10) installed inside the air outlet (11), the air outlet (11) being opened on the right side inside the shell (1), a heating box (12) connected to the right side of the shell (1), and a controller (13) installed on the front side of the heating box (12). Its features are: It also includes a waste heat utilization device (14) located at the upper end of the outer shell (1). The waste heat utilization device (14) includes a diversion drive assembly (141). The diversion drive assembly (141) is connected to the upper end of the outer shell (1). The bottom of the diversion drive assembly (141) is connected to an exhaust pipe (142), and the bottom of the exhaust pipe (142) is connected to the exhaust end of the return pipe (8). The left and right sides of the diversion drive assembly (141) are respectively provided with a first recovery assembly (143) and a second recovery assembly (144). The second recovery assembly (144) extends into the heating box (12), and the upper end of the second recovery assembly (144) is connected to a stirring heating assembly (145).

2. The gas-fired hot air device for deep processing according to claim 1, characterized in that: The flow splitting drive assembly (141) includes a first housing (1411) which is connected to the upper end of the exhaust pipe (142). A three-way pipe (1412) is installed at the bottom of the first housing (1411). The bottom of the three-way pipe (1412) is connected to the exhaust pipe (142), and a flow splitter plate (1413) is rotatably installed in the middle of the three-way pipe (1412). The upper end of the flow splitter plate (1413) is connected to the connecting frame (1414). A slide (1413) is locked at the upper end of the connecting frame (1414). 15), the slide (1415) is slidably connected to the upper end of the first box (1411), and the top of the slide (1415) is provided with a motor (1416). The bottom output end of the motor (1416) is connected to a first bevel gear (1417). The left and right sides of the first bevel gear (1417) are respectively provided with a second bevel gear (1418) and a third bevel gear (1419). The second bevel gear (1418) and the third bevel gear (1419) are respectively connected to the first recycling component (143) and the stirring and heating component (145).

3. The gas-fired hot air device for deep processing according to claim 2, characterized in that: The first recycling component (143) includes a first transmission rod (1431), one end of which is connected to a second bevel gear (1418), and the other end of which passes through the side of the second housing (1432) and is connected to a first bevel gear set (1433). The first bevel gear set (1433) is connected to the outside of a transmission pipe (1434), which is vertically connected to the inside of the second housing (1432). The bottom of the transmission pipe (1434) is connected to an air inlet (2). A rotating rod (1435) is connected to the left side of the first bevel gear set (1433). A cam (1436) is installed in the middle of the rotating rod (1435), and connecting plates (1437) are installed on both sides of the rotating rod (1435). The tops of the connecting plates (1437) on both sides are connected to the inside of the second housing (1432). The cam (1436) is locked in place, and the bottom of the cam (1436) abuts against a roller (1438). The roller (1438) is mounted on the upper end of the movable bracket (1439). The left and right sides of the movable bracket (1439) are connected to the connecting plate (1437). A tension spring (14310) is connected between the movable bracket (1439) and the connecting plates (1437) on both sides. A docking frame (14311) is locked at the bottom of the movable bracket (1439). A sleeve (14312) is provided at the upper right end of the docking frame (14311). The sleeve (14312) is sleeved on the outside of the transmission pipe (1434). A metal hose (14313) is connected to the right side of the sleeve (14312). The right side of the metal hose (14313) is connected to the first recycling pipe (14314). The metal hose (14313) is connected to the left side of the three-way pipe (1412).

4. The gas-fired hot air device for deep processing according to claim 2, characterized in that: The second recycling component (144) includes a second recycling pipe (1441), which is connected to the right side of a three-way pipe (1412). The lower right end of the second recycling pipe (1441) is connected to a third recycling pipe (1442). The bottom of the third recycling pipe (1442) is connected to a collection box (1443). The top of the collection box (1443) is abutted against a heat-concentrating plate (1444). The heat-concentrating plate (1444) is installed at the bottom of a material box (1445), and the material box (1445) is installed at the top of the collection box (1443). Both sides of the bottom of the collection box (1443) are provided with elastic frames (1446).

5. A gas-fired hot air device for deep processing according to claim 4, characterized in that: The stirring heating assembly (145) includes a third housing (1451), which is located on the top of the heating box (12). A second transmission rod (1452) is connected inside the third housing (1451). One end of the second transmission rod (1452) is connected to a third bevel gear (1419), and the other end of the second transmission rod (1452) is provided with a second bevel gear set (1453). The bottom of the second bevel gear set (1453) is connected to a stirring structure (1454), which extends into the heating box (12), and the bottom of the stirring structure (1454) is connected to a material box (1445).

6. The gas-fired hot air device for deep processing according to claim 5, characterized in that: The agitation structure (1454) includes a first rotating component (14541), which is connected to the bottom of the second bevel gear set (1453). The lower end of the first rotating component (14541) is connected to a connecting shaft (14542). The connecting shaft (14542) is inserted into the connecting block (14543), and the connecting block (14543) is equipped with stabilizing plates (14544) on both the front and rear sides. Locking rods (14545) are inserted into the upper and lower sides of the stabilizing plates (14544), and side plates (14546) are locked on both sides of the locking rods (14545). The bottom of the connecting shaft (14542) is connected to a second rotating component (14547). A rotating shaft (14548) is installed at the bottom of the rotating part (14547). The rotating shaft (14548) is vertically positioned and connected to the inside of the connecting pipe (14549). The connecting pipe (14549) is vertically connected to the upper end of the stirring frame (145410). The stirring frame (145410) is rotatably installed in the middle of the material box (1445). An air inlet hood (145411) is connected to the bottom of the stirring frame (145410). A push block (145412) is connected to the side plate (14546) through a shaft. A pull frame (145413) is connected to the outside of the push block (145412). The pull frame (145413) is fixed to both sides of the upper end of the material box (1445).

7. A gas-fired hot air device for deep processing according to claim 2, characterized in that: The top of the diverter plate (1413) is integrally provided with a long strip plate, and the end of the long strip plate at the top of the diverter plate (1413) is connected to the middle of the lower end of the connecting frame (1414) via a shaft.

8. A gas-fired hot air device for deep processing according to claim 3, characterized in that: The connecting plate (1437) and the tension spring (14310) are symmetrically arranged on the left and right sides of the movable bracket (1439), and the upper left and right sides of the movable bracket (1439) are telescopically combined with the connecting plate (1437).

9. A gas-fired hot air device for deep processing according to claim 6, characterized in that: The connecting shaft (14542) is obliquely inserted into the connecting block (14543), and the stabilizing plates (14544) provided at the front and rear of the connecting block (14543) are symmetrically connected with locking rods (14545).

10. A gas-fired hot air device for deep processing according to claim 6, characterized in that: The rotating shaft (14548) has limit strips fixed on both the left and right sides, and the rotating shaft (14548) is vertically limited and connected to the connecting pipe (14549) through the limit strips on both sides.

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