Lead waste crushing and calcining device

Abstract

The invention discloses a crushing and calcining device for lead waste, and particularly relates to the field of lead waste treatment equipment.The crushing and calcining device comprises a calcining furnace, a crushing device is fixedly installed at the top of the calcining furnace, a gas distribution plate is fixedly installed on the lower side of the inner wall of the calcining furnace, and a hot air chamber is arranged between the gas distribution plate and the bottom wall of the calcining furnace; a discharging opening is formed in the side wall of the calcining furnace, a plurality of heat conducting pieces are evenly and fixedly installed on the inner wall of the calcining furnace, and a plurality of electromagnetic induction heaters are fixedly installed outside the calcining furnace. According to the smashing and calcining device for the lead waste, the air outlet pipe, the hot air circulating pipe, the preheating assembly, the heat exchange pipeline, the circulating fan and the air supply pipe are arranged and matched with one another, hot air generated by calcining the lead waste can be conveyed into the heat exchange pipeline, and then the lead waste is preheated in advance through the preheating assembly; the temperature of the lead waste entering the calcining furnace is high, heat recycling is achieved, heat loss is reduced, and energy consumption for calcining the lead waste is reduced.

Description

Technical Field

[0001] The invention relates to the field of lead waste processing equipment, in particular to a lead waste crushing and calcining device. Background Art

[0002] Since the lead-acid battery was invented by French engineer Plante in 1859, it has occupied an important position in the secondary battery market, especially in the automotive battery and electric bicycle market, with its low price and reliable stability. Due to the rapid development of automobile consumption, it can be foreseen that the problem of continued growth in lead consumption and increasing shortage of lead resources will continue for a long time in the future. The main way of large-scale lead production is pyrometallurgy. According to statistics from Yuguang and other companies, a small amount of lead-containing dust is generally mixed in the flue gas produced during the pyrometallurgical process. After these lead-containing dust particles are removed by electric field or bag adsorption, they usually account for 7-12% of the lead production. Therefore, for a lead smelting company with an annual output of 400,000 tons, it means that nearly 40,000 tons of lead-containing flue ash need to be processed every year. Similarly, in existing lead-acid battery manufacturers, the Shimadzu ball milling process of lead powder, the plate paste coating process, the battery tab brushing process and the plate welding process all generate a large amount of lead oxide-containing waste. Therefore, finding an efficient, economical and environmentally friendly method to recycle the lead oxide-containing waste generated by smelters and lead-acid battery production links has become an urgent problem of efficient resource utilization that needs to be solved.

[0003] When treating lead waste, the lead-containing waste slag needs to be calcined. The existing calcination method is to directly put the lead waste slag into the calcination furnace; however, the calcination time required for different lead waste slag sizes will also be different. Traditional calcination furnaces either have incomplete calcination or consume a considerable amount of fuel to ensure complete calcination, which consumes a lot of resources and time. At the same time, the lead waste generates a lot of heat during calcination, resulting in a lot of energy waste. Summary of the invention

[0004] The main purpose of the present invention is to provide a device for crushing and calcining lead waste, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A device for crushing and calcining lead waste comprises a calcining furnace, wherein a crushing device is fixedly installed on the top of the calcining furnace, a gas distribution plate is fixedly installed on the lower side of the inner wall of the calcining furnace, a hot air chamber is arranged between the gas distribution plate and the bottom wall of the calcining furnace, a discharge port is opened on the side wall of the calcining furnace, a plurality of heat conducting plates are evenly fixedly installed on the inner wall of the calcining furnace, a plurality of electromagnetic induction heaters are fixedly installed outside the calcining furnace, the heat conducting plates are located on the upper part of the gas distribution plate, and a scraping assembly is installed in the calcining furnace.

[0007] Preferably, the crushing device includes a crushing box, which is fixedly installed on the top of the calcining furnace, and the inside of the crushing box is provided with a crushing chamber, an annular screening chamber, an annular preheating chamber and a heat exchange pipe from the inside to the outside. A crushing component is installed in the middle of the crushing chamber, a screening component is installed in the annular screening chamber, and a preheating component is installed in the annular preheating chamber. A return port and a discharge port connected to the annular screening chamber are respectively opened in the middle of the top wall and the bottom wall of the crushing chamber.

[0008] Preferably, a feed pipe is fixedly mounted at the front end of the pulverizing box, and the feed pipe extends into the pulverizing chamber.

[0009] Preferably, a feeding port connected to the bottom of the annular screening chamber is provided on the lower top wall of the annular preheating chamber, an outlet is provided on the right side of the lower bottom wall of the annular preheating chamber, a feeding pipe is vertically fixed on the right side of the bottom of the outer surface of the crushing box, the top of the feeding pipe is connected to the outlet, and the bottom of the feeding pipe extends through to the interior of the calcining furnace.

[0010] Preferably, an air outlet pipe is fixedly installed on the left side of the top of the calcining furnace, and the top of the air outlet pipe is fixedly connected to one end of the heat exchange pipe, a circulating fan is fixedly installed on the right end of the calcining furnace, a hot air circulation pipe is fixedly installed on the right end of the crushing box, one end of the hot air circulation pipe is fixedly connected to the heat exchange pipe, and the other end of the hot air circulation pipe is fixedly connected to the circulating fan, an air supply pipe is fixedly installed on one side of the circulating fan, and the end of the air supply pipe away from the circulating fan extends into the hot air chamber, and a damper is provided on the circulating fan.

[0011] Preferably, the scraper assembly includes a first motor, which is fixedly installed at the bottom of the calcining furnace, and a driving rod is fixedly installed at the output end of the first motor. The driving rod passes through the calcining furnace and the top of the gas distribution plate and is fixedly installed with a connecting block, and a scraper is fixedly installed on one side of the connecting block.

[0012] Preferably, the crushing assembly includes a second motor, a main gear and a slave gear, the main gear and the slave gear are both rotatably mounted at the rear end of the crushing box, the main gear and the slave gear are meshed, the second motor is fixedly mounted at the rear end of the crushing box, the output end of the second motor is fixedly connected to the main gear, the front ends of the main gear and the slave gear are both fixedly mounted with a rotating shaft, the front ends of the rotating shaft extend through and into the crushing chamber and are fixedly mounted with a crushing roller, the crushing roller rotates in the crushing chamber, and crushing teeth are fixedly mounted on the outer surface of the crushing roller.

[0013] Preferably, the screening assembly includes a screening ring, a second pulley and a first rotating rod, the screening ring rotates in an annular screening cavity, a first gear ring is fixedly mounted on the outer surface of the screening ring, a plurality of screening holes are opened on the outer surface of the screening ring, a plurality of fixing plates are evenly fixedly mounted on the inner wall of the screening ring, the second pulley is fixedly mounted on the middle part of the rear end of the gear, the first rotating rod is rotatably mounted on the upper part of the rear end of the crushing box, a first pulley is fixedly mounted on the outer surface of the first rotating rod, a first transmission belt is wound around the outer surfaces of the first pulley and the second pulley, a front end of the first rotating rod extends through and into the annular screening cavity and a first gear is fixedly mounted thereon, the first gear is meshed with the first gear ring, and an inner wall of the fixing plate is in close contact with an inner wall of the annular screening cavity.

[0014] Preferably, the preheating assembly includes two annular plates, a third pulley and a second rotating rod, the front and rear side walls of the annular preheating chamber are provided with limiting grooves, the ends of the annular plates close to each other are jointly fixedly installed with a plurality of evenly distributed partition plates, and the ends of the two annular plates away from each other are both fixedly installed with limiting rings, the limiting rings rotate in the limiting grooves, the outside of the limiting ring on the rear side is fixedly installed with a second gear ring, and the top wall of the limiting groove on the rear side is provided with a mounting groove, the third pulley is fixedly installed on the outside of the first rotating rod, the second rotating rod is rotatably installed at the rear end of the crushing box, the outer surface of the second rotating rod is fixedly installed with a fourth pulley, the front end of the second rotating rod extends through the mounting groove and is fixedly installed with a second gear, the second gear is meshed with the second gear ring, and the outer surfaces of the fourth pulley and the third pulley are jointly wrapped with a second transmission belt.

[0015] Preferably, the heat exchange pipe is in an S shape and surrounds the outside of the annular preheating cavity.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention discloses a lead waste crushing and calcining device, which is provided with a crushing component to crush the lead waste entering the calcining furnace, and at the same time, the crushed lead waste is screened with the cooperation of a screening component, so that the lead waste with appropriate particle size enters the calcining furnace, and the lead waste with inappropriate particle size is crushed again by the crushing component. Through repeated crushing and screening, the lead waste particles falling into the calcining furnace are uniform, so that the lead waste is calcined more uniformly, and the calcination energy consumption can also be reduced;

[0018] 2. The present invention discloses a device for crushing and calcining lead waste, which is provided with an air outlet pipe, a hot air circulation pipe, a preheating component, a heat exchange pipe, a circulation fan and an air supply pipe, which cooperate with each other, and can transport the hot air generated by the calcination of the lead waste to the heat exchange pipe, and then preheat the lead waste in advance through the preheating component, so that the temperature of the lead waste entering the calcining furnace is higher, the energy consumption of calcining the lead waste is reduced, the heat recovery is realized, and the heat loss is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the back structure of the present invention;

[0021] Figure 3 It is a front cutaway structural schematic diagram of the present invention;

[0022] Figure 4 It is a schematic diagram of the side cutaway structure of the present invention;

[0023] Figure 5 It is a partial structural schematic diagram of the preheating assembly of the present invention;

[0024] Figure 6 It is a partial structural schematic diagram of the screening assembly of the present invention;

[0025] Figure 7 For the present invention Figure 2 The enlarged schematic diagram of point A in the middle;

[0026] Figure 8 For the present invention Figure 3 The enlarged schematic diagram of point B in the middle;

[0027] Fig. 9 For the present invention Figure 4 Enlarged schematic diagram of point C in the middle.

[0028] In the figure: 1, calcining furnace; 2, crushing device; 3, discharge port; 4, electromagnetic induction heater; 5, heat conducting plate; 6, gas distribution plate; 7, scraper assembly; 8, air outlet pipe; 9, hot air circulation pipe; 10, circulation fan; 11, air door; 12, air supply pipe; 21, crushing box; 22, heat exchange pipeline; 23, annular preheating cavity; 24, annular screening cavity; 25, crushing cavity; 26, discharge port; 27, crushing assembly; 28, screening assembly; 29, preheating assembly; 210, feed pipe; 211, discharge pipe; 212, return port; 231, limiting slot; 232, installation slot; 213, drop port; 214, outlet; 101, hot air chamber; 271, The second motor; 272, main gear; 273, slave gear; 274, crushing roller; 275, crushing teeth; 281, screening ring; 282, screening hole; 283, fixing plate; 284, first gear ring; 285, first gear; 286, first transmission belt; 287, first rotating rod; 288, first pulley; 289, second pulley; 291, annular plate; 292, partition plate; 293, limiting ring; 294, second gear ring; 295, third pulley; 296, second rotating rod; 297, fourth pulley; 298, second transmission belt; 299, second gear; 71, first motor; 72, driving rod; 73, connecting block; 74, scraper. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] like Figure 1-9 As shown, a device for crushing and calcining lead waste comprises a calcining furnace 1, a crushing device 2 is fixedly installed on the top of the calcining furnace 1, a gas distribution plate 6 is fixedly installed on the lower side of the inner wall of the calcining furnace 1, a hot air chamber 101 is arranged between the gas distribution plate 6 and the bottom wall of the calcining furnace 1, a discharge port 3 is opened on the side wall of the calcining furnace 1, a plurality of heat conductive plates 5 are evenly fixedly installed on the inner wall of the calcining furnace 1, a plurality of electromagnetic induction heaters 4 are fixedly installed outside the calcining furnace 1, the heat conductive plates 5 are located on the upper part of the gas distribution plate 6, a scraper assembly 7 is installed in the calcining furnace 1, and the electromagnetic induction heater 4 can heat the heat conductive plates 5 through a magnetic field without contacting the heat conductive plates 5 to provide heat to the heat conductive plates 5, and the heat conductive plates 5 calcine the lead waste placed on the gas distribution plate 6.

[0031] The pulverizing device 2 comprises a pulverizing box 21, which is fixedly mounted on the top of the calcining furnace 1. A pulverizing chamber 25, an annular screening chamber 24, an annular preheating chamber 23 and a heat exchange pipe 22 are sequentially arranged inside the pulverizing box 21 from the inside to the outside. A pulverizing assembly 27 is installed in the middle of the pulverizing chamber 25, a screening assembly 28 is installed in the annular screening chamber 24, a preheating assembly 29 is installed in the annular preheating chamber 23, and the top wall and bottom wall of the pulverizing chamber 25 are provided with a plurality of pulverizing components. A return port 212 and a discharge port 26 communicating with the annular screening chamber 24 are respectively provided in the middle part; a feed pipe 210 is fixedly installed at the front end of the crushing box 21, and the feed pipe 210 extends into the crushing chamber 25. The lead waste is transported to the crushing chamber 25 through the feed pipe 210; a discharge port 213 communicating with the bottom of the annular screening chamber 24 is provided on the lower top wall of the annular preheating chamber 23; an outlet 214 is provided on the right side of the lower bottom wall of the annular preheating chamber 23.

[0032] During specific use, the lead waste is transported from the feed pipe 210 to the crushing chamber 25, and is crushed by the crushing component 27. The crushed lead waste falls into the annular screening chamber 24 through the discharge port 26, and then is screened by the screening component 28. The lead waste with appropriate particle size falls into the annular preheating chamber 23 through the discharge port 213. Driven by the preheating component 29, the lead waste is preheated through the heat exchange pipe 22. The preheated lead waste enters the calcining furnace 1 through the discharge pipe 211. The lead waste with unqualified particle size returns to the crushing chamber 25 and is crushed again by the crushing component 27. Through repeated crushing and screening, the lead waste falling into the calcining furnace 1 is made more uniform.

[0033] A feed pipe 211 is vertically fixedly installed on the right side of the bottom of the outer surface of the crushing box 21. The top of the feed pipe 211 is connected to the outlet 214, and the bottom of the feed pipe 211 extends through the calcining furnace 1. The lead waste generates a large amount of heat during calcination in the calcining furnace 1 and enters the heat exchange pipe 22 through the outlet pipe 8 to preheat the lead waste in the annular preheating cavity 23, thereby improving the efficiency of calcining the lead waste.

[0034] An air outlet pipe 8 is fixedly installed on the left side of the top of the calcining furnace 1, and the top of the air outlet pipe 8 is fixedly connected to one end of the heat exchange pipe 22. A circulating fan 10 is fixedly installed on the right end of the calcining furnace 1, and a hot air circulation pipe 9 is fixedly installed on the right end of the crushing box 21. One end of the hot air circulation pipe 9 is fixedly connected to the heat exchange pipe 22, and the other end of the hot air circulation pipe 9 is fixedly connected to the circulating fan 10. An air supply pipe 12 is fixedly installed on one side of the circulating fan 10, and the end of the air supply pipe 12 away from the circulating fan 10 extends through the hot air chamber 101. The exhaust gas generated by calcination is transported to the heat exchange pipe 22 through the air outlet pipe 8. The waste lead in the annular preheating cavity 23 is preheated in the heat exchange pipe 22, and the waste gas enters the hot air circulation pipe 9 from the heat exchange pipe 22. Driven by the circulating fan 10, the waste gas is transported to the hot air chamber 101 through the air supply pipe 12, and the heat discharged from the calcining furnace 1 can be recycled into the hot air chamber 101. Since a plurality of air holes are provided on the gas distribution plate 6, the heat collected in the hot air chamber 101 can re-enter the calcining furnace 1 through the air holes distributed on the gas distribution plate 6, thereby realizing heat recovery, reducing heat loss, and reducing the energy consumption of calcining the waste lead. The circulating fan 10 is provided with a damper 11, and the damper 11 is used to introduce ambient air into the hot air circulation pipe. After the damper 11 is opened, the ambient air will enter the circulating fan 10 through the damper 11, and then blow the ambient air into the calcining furnace 1.

[0035] The scraper assembly 7 includes a first motor 71, which is fixedly mounted at the bottom of the calcining furnace 1. A driving rod 72 is fixedly mounted at the output end of the first motor 71. The driving rod 72 passes through the calcining furnace 1 and the top of the gas distribution plate 6 and is fixedly mounted with a connecting block 73. A scraper 74 is fixedly mounted on one side of the connecting block 73. Two scrapers 74 are provided, and comb teeth are fixedly mounted at the bottom of the two scrapers 74. The comb teeth of the two scrapers 74 are not in the same position, but are arranged crosswise with each other. When in use, the first motor 71 drives the driving rod 72 to rotate, the driving rod 72 drives the connecting block 73 to rotate, and the connecting block 73 drives the scraper 74 to rotate. The scraper 74 scrapes the lead waste on the upper part of the gas distribution plate 6, scrapes the lead waste on the gas distribution plate 6 evenly, and turns the lead waste, so that the lead waste is more efficient during calcination.

[0036] The crushing assembly 27 includes a second motor 271, a main gear 272 and a slave gear 273. The main gear 272 and the slave gear 273 are both rotatably mounted at the rear end of the crushing box 21. The main gear 272 and the slave gear 273 are meshed. The second motor 271 is fixedly mounted at the rear end of the crushing box 21. The output end of the second motor 271 is fixedly connected to the main gear 272. The front ends of the main gear 272 and the slave gear 273 are both fixedly mounted with a rotating shaft. The front ends of the rotating shaft extend through the crushing chamber 25 and are fixedly mounted with a crushing roller 274. The crushing roller 274 rotates in the crushing chamber 25, and the outer surface of the crushing roller 274 is fixedly mounted with crushing teeth 275.

[0037] During specific use, the second motor 271 drives the main gear 272 to rotate, and the main gear 272 drives the slave gear 273 to rotate. At the same time, the crushing roller 274 is driven to rotate through the rotating shaft to crush the lead waste in the crushing chamber 25, so that the size of the lead waste is more uniform, and the calcination is more uniform during calcination.

[0038] The screening assembly 28 includes a screening ring 281, a second pulley 289 and a first rotating rod 287. The screening ring 281 rotates in the annular screening cavity 24. A first gear ring 284 is fixedly installed on the outer surface of the screening ring 281. A plurality of screening holes 282 are opened on the outer surface of the screening ring 281. A plurality of fixed plates 283 are evenly fixedly installed on the inner wall of the screening ring 281. The second pulley 289 is fixedly installed in the middle of the rear end of the slave gear 273. The first rotating rod 287 is rotatably installed on the upper rear end of the crushing box 21. A first pulley 288 is fixedly installed on the outer surface of the first rotating rod 287. The outer surfaces of the first pulley 288 and the second pulley 289 are jointly wound with a first transmission belt 286. The front end of the first rotating rod 287 extends through the annular screening cavity 24 and is fixedly installed with a first gear 285. The first gear 285 is meshed with the first gear ring 284. The inner wall of the fixed plate 283 is in close contact with the inner wall of the annular screening cavity 24.

[0039] The crushed lead waste is screened by the screening assembly 28, so that the crushed lead waste is more uniform, the size of the lead waste falling into the calcining furnace 1 is more uniform, the calcination uniformity of the lead waste is improved, and the energy consumption of calcination is reduced. When in use, the second pulley 289 is driven by the gear 273 to rotate, the second pulley 289 drives the first pulley 288 to rotate through the transmission belt, the first pulley 288 drives the first rotating rod 287 to rotate, the first rotating rod 287 drives the first gear 285 to rotate, the first gear 285 drives the first gear ring 284 to rotate, the first gear ring 284 drives the screening ring 281 to rotate, the screening ring 281 rotates, and drives the lead waste falling from the discharge port 26 into the annular screening cavity 24 through the fixed plate 283. The lead waste with appropriate particle size rotates and passes through the screening hole 282, while the lead waste with inappropriate particle size moves along the annular screening chamber 24. When it moves to the top of the annular screening chamber 24, it falls back into the crushing chamber 25 from the return port 212 and is crushed again by the crushing assembly 27. The crushing is repeated many times, and the lead waste entering the crushing box 21 from the feed pipe 210 is crushed evenly, so that the lead waste entering the calcining furnace 1 is uniform in size, the calcination efficiency of the lead waste is improved, and the lead waste is calcined more evenly.

[0040] In order to reduce the energy consumption of calcining lead waste, reuse the heat generated by calcination, and preheat the lead waste in advance before calcining, the specific structure of the preheating component 29 arranged in the annular preheating chamber 23 includes two annular plates 291, a third pulley 295 and a second rotating rod 296. The front and rear side walls of the annular preheating chamber 23 are both provided with limiting grooves 231. The ends of the annular plates 291 close to each other are jointly fixedly installed with a plurality of evenly distributed partition plates 292. The ends of the two annular plates 291 away from each other are both fixedly installed with limiting rings 293. The limiting rings 293 rotate in the limiting grooves 231, and the limiting rings on the rear side are A second gear ring 294 is fixedly installed on the outside of 293, and a mounting groove 232 is opened on the top wall of the limiting groove 231 on the rear side. The third pulley 295 is fixedly installed on the outside of the first rotating rod 287, and the second rotating rod 296 is rotatably installed on the rear end of the crushing box 21. A fourth pulley 297 is fixedly installed on the outer surface of the second rotating rod 296. The front end of the second rotating rod 296 extends through and extends into the mounting groove 232 and is fixedly installed with a second gear 299. The second gear 299 is meshed with the second gear ring 294, and the outer surfaces of the fourth pulley 297 and the third pulley 295 are commonly wound with a second transmission belt 298.

[0041] In specific use, when the first rotating rod 287 rotates, the third pulley 295 is driven to rotate, and the third pulley 295 drives the fourth pulley 297 to rotate through the second transmission belt 298, and the fourth pulley 297 drives the second rotating rod 296 to rotate, and the second rotating rod 296 drives the second gear 299 to rotate, and the second gear 299 drives the second gear ring 294 to rotate, and the second gear ring 294 drives the limiting ring 293 to rotate, and the limiting ring 293 drives the annular plate 291 to rotate, and the annular plate 291 drives the partition plate 292 to rotate, and the partition plate 292 drives the lead waste to rotate in the annular preheating cavity 23 for nearly one circle, and then falls into the calcining furnace 1 through the discharge pipe 211. When the lead waste moves in the annular preheating cavity 23, the heat emitted by the hot gas in the heat exchange pipe 22 heats the annular preheating cavity 23, and then preheats the lead waste, so that the temperature of the lead waste falling into the calcining furnace 1 is relatively high, thereby reducing the energy consumption required for calcining the lead waste.

[0042] The heat exchange pipe 22 is S-shaped and surrounds the outside of the annular preheating cavity 23. The hot gas in the heat exchange pipe 22 heats the annular preheating cavity 23, thereby preheating the lead waste in the annular preheating cavity 23, thereby reducing the energy consumption of calcining the lead waste.

[0043] The working principle of the present invention is as follows: when in use, the lead waste is transported from the feed pipe 210 to the crushing chamber 25, the crushing assembly 27 is started, the second motor 271 drives the main gear 272 to rotate, the main gear 272 drives the slave gear 273 to rotate, and at the same time drives the crushing roller 274 to rotate through the rotating shaft to crush the lead waste in the crushing chamber 25, the crushed lead waste falls into the annular screening chamber 24 through the discharge port 26, and then the crushed lead waste is screened through the screening assembly 28, the slave gear 273 drives the second pulley 289 to rotate, the second pulley 289 drives the first pulley 288 to rotate through the transmission belt, the first pulley 288 drives the first rotating rod 287 to rotate, the first rotating rod 287 drives the first gear 285 to rotate, and the first gear 285 drives the first gear ring 284 to rotate, the first gear ring 284 drives the screening ring 281 to rotate, the screening ring 281 drives the lead waste that falls from the discharge port 26 into the annular screening chamber 24 to rotate through the fixed plate 283, the lead waste with inappropriate particle size moves with the screening ring 281, when the fixed plate 283 moves to the top of the annular screening chamber 24, the lead waste falls back from the return port 212 into the crushing chamber 25, and is crushed again by the crushing assembly 27, and is crushed repeatedly for many times, so that the lead waste that enters the crushing box 21 from the feed pipe 210 is crushed evenly, and the lead waste with appropriate particle size falls into the annular screening chamber through the screening hole 282, and then falls into the annular preheating chamber 23 along the discharge port 213, and when the first rotating rod 287 rotates, it drives The third pulley 295 rotates, and the third pulley 295 drives the fourth pulley 297 to rotate through the second transmission belt 298, and the fourth pulley 297 drives the second rotating rod 296 to rotate, and the second rotating rod 296 drives the second gear 299 to rotate, and the second gear 299 drives the second gear ring 294 to rotate, and the second gear ring 294 drives the limiting ring 293 to rotate, and the limiting ring 293 drives the arc plate to rotate, and the annular plate 291 drives the partition plate 292 to rotate, and the partition plate 292 drives the lead waste to rotate in the annular preheating cavity 23 for nearly one circle, and then falls into the calcining furnace 1 through the discharge pipe 211. When the lead waste moves in the annular preheating cavity 23, the hot gas generated by the calcination of the calcining furnace 1 is transported to the heat exchange pipe 22 through the outlet pipe 7, and the heat exchange pipe 2 2 heats the annular preheating cavity 23, and then preheats the lead waste, so that the temperature of the lead waste falling into the calcining furnace 1 is relatively high, thereby reducing the energy consumption required for calcining the lead waste, and preheating the lead waste through the heat exchange pipe 22, and the preheated lead waste enters the calcining furnace 1 through the discharge pipe 211, and the hot air moves in the heat exchange pipe 22 for a circle and then enters the hot air circulation pipe 9, and then, driven by the circulating fan 10, it is re-transported to the hot air chamber 101 through the air supply pipe 12, so that the heat discharged from the calcining furnace 1 can be recycled into the hot air chamber 101, and the heat collected in the hot air chamber 101 re-enters the calcining furnace 1 through the air holes distributed on the gas distribution plate 6, thereby realizing heat recovery and reducing heat loss.Further reduce the energy consumption of calcining lead waste.

[0044] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for crushing and calcining lead waste, characterized in that: The invention comprises a calcining furnace (1), wherein a crushing device (2) is fixedly installed on the top of the calcining furnace (1), a gas distribution plate (6) is fixedly installed on the lower side of the inner wall of the calcining furnace (1), a hot air chamber (101) is arranged between the gas distribution plate (6) and the bottom wall of the calcining furnace (1), a discharge port (3) is opened on the side wall of the calcining furnace (1), a plurality of heat conducting plates (5) are evenly fixedly installed on the inner wall of the calcining furnace (1), a plurality of electromagnetic induction heaters (4) are fixedly installed on the outside of the calcining furnace (1), and the heat conducting plates (5) are located on the upper part of the gas distribution plate (6), and a scraper assembly (7) is installed in the calcining furnace (1).

2. The lead waste crushing and calcining device according to claim 1, characterized in that: The pulverizing device (2) comprises a pulverizing box (21), the pulverizing box (21) being fixedly mounted on the top of the calcining furnace (1), the pulverizing box (21) being provided with a pulverizing chamber (25), an annular screening chamber (24), an annular preheating chamber (23) and a heat exchange pipe (22) in sequence from the inside to the outside, a pulverizing assembly (27) being installed in the middle of the pulverizing chamber (25), a screening assembly (28) being installed in the annular screening chamber (24), a preheating assembly (29) being installed in the annular preheating chamber (23), and a return port (212) and a discharge port (26) being respectively provided in the middle of the top wall and the bottom wall of the pulverizing chamber (25) and communicating with the annular screening chamber (24).

3. The lead waste crushing and calcining device according to claim 2, characterized in that: A feeding pipe (210) is fixedly mounted on the front end of the pulverizing box (21), and the feeding pipe (210) extends into the pulverizing chamber (25).

4. The lead waste crushing and calcining device according to claim 2, characterized in that: The lower top wall of the annular preheating chamber (23) is provided with a material discharge port (213) which is connected to the bottom of the annular screening chamber (24); the lower bottom wall of the annular preheating chamber (23) is provided with an outlet (214) on the right side; a material discharge pipe (211) is vertically fixedly installed on the right side of the bottom of the outer surface of the crushing box (21); the top of the material discharge pipe (211) is connected to the outlet (214); and the bottom of the material discharge pipe (211) extends through and into the interior of the calcining furnace (1).

5. The lead waste crushing and calcining device according to claim 2, characterized in that: An air outlet pipe (8) is fixedly installed on the left side of the top of the calcining furnace (1), and the top of the air outlet pipe (8) is fixedly connected to one end of the heat exchange pipe (22). A circulating fan (10) is fixedly installed on the right end of the calcining furnace (1). A hot air circulation pipe (9) is fixedly installed on the right end of the crushing box (21), and one end of the hot air circulation pipe (9) is fixedly connected to the heat exchange pipe (22), and the other end of the hot air circulation pipe (9) is fixedly connected to the circulating fan (10). An air supply pipe (12) is fixedly installed on one side of the circulating fan (10), and one end of the air supply pipe (12) away from the circulating fan (10) extends through the hot air chamber (101), and a damper (11) is provided on the circulating fan (10).

6. The lead waste crushing and calcining device according to claim 1, characterized in that: The scraper assembly (7) comprises a first motor (71), the first motor (71) is fixedly mounted on the bottom of the calcining furnace (1), a driving rod (72) is fixedly mounted on the output end of the first motor (71), the driving rod (72) passes through the calcining furnace (1) and the top of the gas distribution plate (6) and is fixedly mounted with a connecting block (73), a scraper (74) is fixedly mounted on one side of the connecting block (73), and the bottom of the scraper (74) is in close contact with the upper end of the gas distribution plate (6).

7. The lead waste crushing and calcining device according to claim 2, characterized in that: The pulverizing assembly (27) comprises a second motor (271), a main gear (272) and a slave gear (273); the main gear (272) and the slave gear (273) are both rotatably mounted at the rear end of the pulverizing box (21); the main gear (272) and the slave gear (273) are meshed; the second motor (271) is fixedly mounted at the rear end of the pulverizing box (21); the output end of the second motor (271) is fixedly connected to the main gear (272); the front ends of the main gear (272) and the slave gear (273) are both fixedly mounted with a rotating shaft; the front ends of the rotating shaft extend through the pulverizing chamber (25) and are fixedly mounted with a pulverizing roller (274); the pulverizing roller (274) rotates in the pulverizing chamber (25); and the outer surface of the pulverizing roller (274) is fixedly mounted with pulverizing teeth (275).

8. The device for crushing and calcining lead waste according to claim 7, characterized in that: The screening assembly (28) comprises a screening ring (281), a second belt pulley (289) and a first rotating rod (287). The screening ring (281) rotates in the annular screening cavity (24). A first gear ring (284) is fixedly mounted on the outer surface of the screening ring (281). A plurality of screening holes (282) are formed on the outer surface of the screening ring (281). A plurality of fixing plates (283) are evenly fixedly mounted on the inner wall of the screening ring (281). The second belt pulley (289) is fixedly mounted on the slave gear (273). ) at the middle of the rear end of the crushing box (21), the first rotating rod (287) is rotatably mounted on the upper part of the rear end of the crushing box (21), a first belt pulley (288) is fixedly mounted on the outer surface of the first rotating rod (287), a first transmission belt (286) is wound around the outer surfaces of the first belt pulley (288) and the second belt pulley (289), a front end of the first rotating rod (287) extends through the annular screening cavity (24) and is fixedly mounted with a first gear (285), the first gear (285) is meshed with the first gear ring (284).

9. The lead waste crushing and calcining device according to claim 8, characterized in that: The preheating assembly (29) comprises two annular plates (291), a third pulley (295) and a second rotating rod (296); the front and rear side walls of the annular preheating channel (23) are both provided with limiting grooves (231); the ends of the annular plates (291) close to each other are fixedly mounted with a plurality of evenly distributed partition plates (292); the ends of the two annular plates (291) away from each other are both fixedly mounted with limiting rings (293); the limiting rings (293) rotate in the limiting grooves (231); the rear limiting ring (293) is externally fixedly mounted with a second gear ring (294); the top wall of the rear limiting groove (231) A mounting groove (232) is provided, the third pulley (295) is fixedly mounted on the outside of the first rotating rod (287), the second rotating rod (296) is rotatably mounted on the rear end of the crushing box (21), a fourth pulley (297) is fixedly mounted on the outer surface of the second rotating rod (296), the front end of the second rotating rod (296) extends through the mounting groove (232) and is fixedly mounted with a second gear (299), the second gear (299) is meshed with the second gear ring (294), and a second transmission belt (298) is wound around the outer surfaces of the fourth pulley (297) and the third pulley (295).

10. The lead waste crushing and calcining device according to claim 2, characterized in that: The heat exchange pipe (22) is in an S shape and surrounds the outside of the annular preheating cavity (23).

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