A heat energy recycling device and high-value utilization method of lithium-containing waste materials

Abstract

The application provides a heat energy recycling device and a high-value utilization method of lithium-containing waste. The heat energy recycling device comprises a tank body. The heat energy recycling device and the high-value utilization method of lithium-containing waste provided by the application gradually increase the vent hole through the gradually expanding design of the gas conveying pipe, realize uniform distribution of high-temperature flue gas, eliminate local overheating, and make the rotating pipe stretch out after the rotation speed of the centrifugal driving mixing plate is increased, so that the low-temperature liquid is forced to flow to the heat exchange pipe area, the temperature stratification is completely broken, the heat exchange efficiency is improved, the motor speed is linked with the flue gas flow, the flue gas flow increases the rotation speed, the heat exchange is increased to avoid waste of heat energy, the blade synchronously drives away the high-temperature liquid to avoid accumulation of the high-temperature liquid in the center area, the one-way valve is automatically opened when the flue gas pressure is increased, the position of the sleeve pipe two is matched with the centrifugal force and the heat exchange efficiency, different working conditions in the tank body are matched, and the filter screen is arranged to avoid that the impurity particles hinder heat exchange in the heat exchange pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat energy recovery, in particular to a heat energy recovery and recycling device and a high-value utilization method of lithium-containing waste. BACKGROUND

[0002] The core of high-value utilization of lithium-containing waste is to convert waste into lithium products through the processes of grinding, mixing, roasting, leaching, impurity removal, concentration and lithium precipitation. The heat energy recovery and recycling device is an energy-saving device for converting waste heat generated in the high-value utilization process of lithium-containing waste into usable energy. The core goal is to improve energy utilization, reduce production costs and reduce environmental pollution by recovering waste heat.

[0003] The existing heat energy recovery and recycling device takes heat exchange pipes as the core of heat conduction, and the internal working medium efficiently transfers heat through vapor-liquid phase change. High-temperature flue gas exchanges heat with cold fluid on the inside and outside of the heat exchange pipe. The cold fluid is heated by the high-temperature flue gas, and the flue gas is discharged after the temperature is reduced.

[0004] However, in the heat exchange process of the existing heat energy recovery and recycling device, the temperature of the liquid after heating is higher, and the liquid after heating is closer to the center, that is, the liquid after heating is closer to the heat exchange pipe. The temperature rises faster, the density is small, so the specific gravity is light, and the centrifugal force is weak, and it is gathered to the center, wasting the heat of the flue gas, and the low-temperature liquid is thrown to the inner wall of the tank, which is difficult to contact the heat exchange pipe, resulting in a decrease in heat exchange efficiency.

[0005] Therefore, it is necessary to provide a heat energy recovery and recycling device and a high-value utilization method of lithium-containing waste to solve the above technical problems. SUMMARY

[0006] The present application provides a heat energy recovery and recycling device and a high-value utilization method of lithium-containing waste, which solves the problem of high-temperature liquid gathering to the center, wasting flue gas heat, and low-temperature liquid being difficult to contact the heat exchange pipe, resulting in a decrease in heat exchange efficiency.

[0007] To solve the above technical problems, the present application provides a heat energy recovery and recycling device, which comprises a tank body, the bottom of the tank body is fixedly installed on the ground through two supports, the top of the tank body is communicated with a water inlet pipe, the bottom of the tank body is communicated with a water outlet pipe, one side of the tank body is provided with a connecting port, the other side of the tank body is provided with an air outlet, and the heat energy recovery and recycling device further comprises: an air inlet pipe for inputting high-temperature flue gas;

[0008] A filtering mechanism is arranged for filtering impurities in the high-temperature flue gas;

[0009] A baffle mechanism is arranged for conveying the filtered high-temperature flue gas to the connecting port;

[0010] The heat exchange mechanism is rotatably installed on the inner wall of the tank body, and comprises a rotating pipe rotatably installed on the inner wall of the tank body, one end of the rotating pipe being in communication with one side of the connecting port, and the surface of the rotating pipe being in communication with five groups of heat exchange pipes;

[0011] The mixing mechanism is fixedly installed on the surface of the rotating pipe and located between every two groups of the heat exchange pipes, and comprises a fixed ring fixedly installed on the surface of the rotating pipe and located between two groups of the heat exchange pipes, four blades fixedly installed on the surface of the fixed ring, four sleeve one fixedly installed on the surface of the fixed ring, a sleeve two slidingly connected in the sleeve one, and a mixing plate fixedly installed on the top of the sleeve two.

[0012] The driving mechanism is used for driving the rotating pipe to rotate.

[0013] The gas conveying pipe is fixedly installed on one end of the rotating pipe in communication with the connecting port, in communication with the connecting port, and provided with a plurality of air holes on the surface.

[0014] Preferably, one side of the filtering mechanism is in communication with one end of the air inlet pipe, the filtering mechanism comprises a filtering box, one side of the filtering box is in communication with one end of the air inlet pipe, a filter screen is fixedly installed in a circular groove formed on the other side of the filtering box, and a recycling box is in communication with the bottom of the filtering box.

[0015] Preferably, the driving mechanism is fixedly installed on one side of the tank body, the driving mechanism comprises a motor fixedly installed on one side of the tank body, an output shaft of the motor penetrates one side of the tank body and extends into the interior, a gear one is fixedly installed on the output shaft of the motor in the interior of the tank body, a gear two is fixedly installed on the surface of the rotating pipe, and the gear one engages the gear two.

[0016] Preferably, four one-way valves are fixedly installed on one side of the rotating pipe, and the hole diameter of the air holes gradually increases near the end of the gas conveying pipe.

[0017] Preferably, the baffle mechanism is fixedly installed between the tank body and the filtering box, the baffle mechanism comprises a baffle box fixedly installed between the tank body and the filtering box, the baffle box is in communication with the connecting port and the filtering box respectively on two sides, an air cylinder is fixedly installed on the bottom of the inner wall of the baffle box, a baffle is fixedly installed on the output end of the air cylinder through a fixed plate, and the baffle is installed in fit with the filter screen.

[0018] Preferably, one side of the air outlet is communicated with a discharge mechanism, the discharge mechanism comprises a connecting pipe, one end of the connecting pipe is communicated with one side of the air outlet, one end of the connecting pipe is communicated with a three-way valve, one side of the three-way valve is communicated with a discharge port, the top of the three-way valve is communicated with a regenerative pipe, one side of the three-way valve is provided with a three-way valve switch, and the water inlet pipe is located outside the tank body.

[0019] Preferably, the surface of the rotating pipe is fixedly installed with a gear three, one side of the inner wall of the tank body is rotatably installed with a gear shaft, one end of the gear shaft penetrates one side of the tank body and extends to the inner wall of the filter box, and one end of the gear shaft located inside the tank body is fixedly installed with a gear four, and the gear three engages the gear four.

[0020] Preferably, the inner wall of the filter box is rotatably installed with a cleaning mechanism, the cleaning mechanism comprises a lead screw, the lead screw is rotatably installed on the inner wall of the filter box, one end of the lead screw is fixedly connected with one end of the gear shaft, the surface of the lead screw is threadedly connected with a sliding block, the bottom of the sliding block is fixedly installed with a push plate, the inner wall of the filter box is rotatably installed with a rotating shaft, one end of the rotating shaft is fixedly installed with a disc, one side of the disc is fixedly installed with a convex shaft, the convex shaft is installed in fit with the push plate, the bottom of the disc is rotatably installed with a pendulum shaft through two connecting frames, the surface of the pendulum shaft is fixedly installed with a pendulum through a pendulum rod, the inner wall of the filter box is fixedly installed with a cylinder switch, and the push plate is installed in fit with the cylinder switch.

[0021] Preferably, one side of the tank body is fixedly installed with a cleaning mechanism, the cleaning mechanism comprises a water pump, the water pump is fixedly installed on one side of the tank body, the water suction end of the water pump is communicated with the inside of the tank body through a water suction pipe, the water outlet end of the water pump is communicated with a water tank through a water delivery pipe, the water delivery pipe penetrates one side of the filter box and extends to the inside, the water tank is fixedly installed on the inner wall of the filter box and installed in fit with the filter screen, and the bottom of the water tank is provided with a plurality of spray heads.

[0022] A high-value utilization method of lithium-containing waste material, comprising the following steps:

[0023] Step S1: grinding: grinding the lithium-containing waste material to a certain particle size to obtain fine material, the particle size is 60-325 mesh, wherein the lithium-containing waste material is various lithium-containing glasses, various lithium-containing molecular sieves and other lithium-containing silicates, aluminosilicates or phosphoaluminates waste materials;

[0024] Step S2: mixing: the fine powder obtained in step S1 is mixed with excipients in a certain proportion to obtain a mixture; the excipients include excipient one and excipient two, the excipient one is one or more of lepidolite, spodumene and lithium clay; the excipient two is one or more of sodium sulfate, potassium sulfate, calcium sulfate, calcium carbonate, calcium hydroxide, calcium oxide, iron sulfate, aluminum sulfate, ammonium sulfate and sulfuric acid;

[0025] Step S3: calcination: the mixture obtained in step S2 is placed in a high-temperature furnace for high-temperature calcination, the calcination temperature is 800-1300℃, and the reaction time is 15-100 minutes, to obtain a clinker, and the high-temperature flue gas generated after high-temperature calcination in the high-temperature furnace is input into a heat energy recovery and recycling device for heat energy recovery treatment;

[0026] Step S4: leaching: the clinker obtained in step S3 is leached with water in a ratio of 0.5-2:1, and the leaching time is 5-30 minutes, to obtain a leaching solution;

[0027] Step S5: impurity removal: the leaching solution obtained in step S4 is subjected to impurity removal, ammonia water, calcium oxide or caustic soda is first added to the leaching solution to adjust the pH to 10-13, then according to the amount of calcium, soda ash is added, and the reaction is carried out for 20-120 minutes, wherein the excess of soda ash is 0-30%, and the purified solution is obtained after filtration;

[0028] Step S6: concentration: the purified solution obtained in step S5 is concentrated to a lithium oxide concentration of 20-60g / L to obtain a purified concentrated solution;

[0029] Step S7: lithium precipitation: the purified concentrated solution obtained in step S6 is subjected to lithium precipitation, soda ash solution is added to the purified concentrated solution, centrifugal separation is carried out, drying and packaging are carried out, and a lithium carbonate product is obtained; sodium hydroxide solution is added to the purified concentrated solution, and then sodium sulfate is removed by freezing, concentration, centrifugal separation of lithium hydroxide, drying and crushing, and packaging to obtain a lithium hydroxide product; calcium chloride is added to the purified concentrated solution, calcium sulfate is removed by filtration, and the obtained lithium chloride solution is concentrated to precipitate lithium chloride, dried and packaged to obtain a lithium chloride product.

[0030] Compared with the related art, the heat energy recovery and recycling device provided by the application has the following beneficial effects:

[0031] The application provides a heat energy recycling device, which gradually increases the vent hole through the gradually expanding design of the gas conveying pipe, realizes uniform distribution of high-temperature flue gas, eliminates local overheating, extends the rotating pipe after the centrifugal driving of the mixing plate is increased in speed, forcibly drives low-temperature liquid to flow to the heat exchange pipe area, completely breaks the temperature stratification, improves the heat exchange efficiency, the motor speed is linked with the flue gas flow, the speed is increased with the increase of the flue gas, the heat exchange is avoided to waste heat energy, the blade synchronously drives away the high-temperature liquid to avoid the accumulation of the high-temperature liquid in the center area, the one-way valve is automatically opened with the increase of the flue gas pressure, the position of the sleeve pipe two is matched with the centrifugal force and the heat exchange efficiency, different working conditions in the tank body are matched, and the filter screen is arranged to avoid that impurity particles hinder heat exchange in the heat exchange pipe. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A structure schematic view of a preferred embodiment of a heat energy recycling device provided by the application is shown in the figure;

[0033] Figure 2 Another structure schematic view of a heat energy recycling device is shown in the figure;

[0034] Figure 3 A structure schematic view of a filter mechanism shown in the figure; Figure 1

[0035] A structure schematic view of a heat exchange mechanism shown in the figure; Figure 4 Figure 1 A structure schematic view of a mixing mechanism shown in the figure;

[0036] Figure 5 Figure 1 An enlarged schematic view of A shown in the figure;

[0037] Figure 6 A structure schematic view of a second embodiment of a heat energy recycling device is shown in the figure; Figure 1

[0038] A mounting schematic view of a cleaning mechanism shown in the figure; Figure 7

[0039] A mounting schematic view of a cleaning mechanism shown in the figure; Figure 8 Figure 7 A structure schematic view of a baffle mechanism shown in the figure;

[0040] Figure 9 Figure 8 A structure schematic view of an exhaust mechanism shown in the figure;

[0041] Figure 10 A structure schematic view of an exhaust mechanism shown in the figure; Figure 8

[0042] A structure schematic view of an exhaust mechanism shown in the figure; Figure 11 Figure 8 A structure schematic view of an exhaust mechanism shown in the figure;

[0043] ​​​​​Figure 12 As shown in the structural schematic view of the cleaning mechanism; Figure 8

[0044] Figure 13 As shown in another structural schematic view of the cleaning mechanism; Figure 12

[0045] Figure 14 As shown in the structural schematic view of the cleaning mechanism. Figure 9

[0046] Figure label: 1, tank body, 2, filter mechanism, 201, filter box, 202, filter screen, 203, recycling box, 3, baffle mechanism, 301, baffle box, 302, air cylinder, 303, baffle, 4, heat exchange mechanism, 401, rotating pipe, 402, heat exchange pipe, 5, mixing mechanism, 501, fixed ring, 502, blade, 503, sleeve one, 504, sleeve two, 505, mixing plate, 6, drive mechanism, 601, motor, 602, gear one, 603, gear two, 7, discharge mechanism, 701, connecting pipe, 702, three-way valve, 703, three-way valve switch, 704, discharge port, 705, regenerative pipe, 8, cleaning mechanism, 801, lead screw, 802, sliding block, 803, push plate, 804, rotating shaft, 805, disc, 806, convex shaft, 807, connecting frame, 808, pendulum shaft, 809, pendulum rod, 810, pendulum, 811, air cylinder switch, 9, cleaning mechanism, 901, water pump, 902, water suction pipe, 903, water delivery pipe, 904, water tank, 905, spray head, 10, gas delivery pipe, 11, water inlet pipe, 12, water outlet pipe, 13, gas outlet, 14, support, 15, air inlet pipe, 16, check valve, 17, gear three, 18, gear four, 19, connecting port, 20, air hole, 21, gear shaft. DETAILED DESCRIPTION

[0047] The application will be further described below in conjunction with the drawings and embodiments.

[0048] First embodiment

[0049] Please refer to Figures 1-6 A heat energy recycling device, comprising a tank body 1, the bottom of the tank body 1 is fixedly installed on the ground through two supports 14, the top of the tank body 1 is communicated with a water inlet pipe 11, the bottom of the tank body 1 is communicated with a water outlet pipe 12, one side of the tank body 1 is provided with a connecting port 19, the other side of the tank body 1 is provided with a gas outlet 13, further comprising: an air inlet pipe 15 for inputting high-temperature flue gas;

[0050] A filter mechanism 2, the filter mechanism 2 is used for filtering impurities in the high-temperature flue gas;

[0051] ​​​A baffle mechanism 3 is arranged to deliver filtered high-temperature flue gas to the connecting port 19.

[0052] A heat exchange mechanism 4 is rotatably arranged on the inner wall of the tank body 1. The heat exchange mechanism 4 comprises a rotating pipe 401 rotatably arranged on the inner wall of the tank body 1. One end of the rotating pipe 401 is in communication with one side of the connecting port 19. The surface of the rotating pipe 401 is in communication with five groups of heat exchange pipes 402.

[0053] Four mixing mechanisms 5 are fixedly arranged on the surface of the rotating pipe 401 and located between every two groups of heat exchange pipes 402. The mixing mechanism 5 comprises a fixed ring 501 fixedly arranged on the surface of the rotating pipe 401 and located between two groups of heat exchange pipes 402. The surface of the fixed ring 501 is fixedly provided with four blades 502. The surface of the fixed ring 501 is fixedly provided with four sleeve one 503. The inside of each of the four sleeve one 503 is slidingly connected with a sleeve two 504. The top of each of the four sleeve two 504 is fixedly provided with a mixing plate 505.

[0054] A driving mechanism 6 is arranged to drive the rotating pipe 401 to rotate.

[0055] A gas conveying pipe 10 is fixedly arranged on the end of the rotating pipe 401 in communication with the connecting port 19. The gas conveying pipe 10 is in communication with the connecting port 19. The surface of the gas conveying pipe 10 is provided with a plurality of air holes 20.

[0056] One side of the filtering mechanism 2 is in communication with one end of the air inlet pipe 15. The filtering mechanism 2 comprises a filtering box 201. One side of the filtering box 201 is in communication with one end of the air inlet pipe 15. A filter screen 202 is fixedly arranged in the circular groove formed on the other side of the filtering box 201. The bottom of the filtering box 201 is in communication with a recycling box 203.

[0057] The driving mechanism 6 is fixedly arranged on one side of the tank body 1. The driving mechanism 6 comprises a motor 601 fixedly arranged on one side of the tank body 1. The output shaft of the motor 601 penetrates one side of the tank body 1 and extends into the inside of the tank body 1. The output shaft of the motor 601 located inside the tank body 1 is fixedly provided with a gear one 602. The surface of the rotating pipe 401 is fixedly provided with a gear two 603. The gear one 602 engages with the gear two 603.

[0058] One side of the rotating pipe 401 is fixedly provided with four one-way valves 16. The hole diameter of the air holes 20 gradually increases as the end of the gas conveying pipe 10 is approached.

[0059] In actual use, the air vent 20 on the gas conveying pipe 10 is gradually increased in diameter from the initial end to the terminal end; the mixing mechanism 5 is provided with four; the limit position of the sleeve 504 driving the mixing plate 505 extending out is close to the inner wall of the tank 1; each group of the heat exchange pipe 402 is provided with eight and is evenly distributed on the surface of the rotating pipe 401; the sleeve 1 503 and the sleeve 2 504 are sealingly arranged, the rotating speed of the rotating pipe 401 is reduced, and the sleeve 2 504 is gradually reset; the heat exchange pipe 402 is a copper pipe.

[0060] The working principle of the heat energy recycling device provided by the application is as follows:

[0061] First, the inlet pipe 15 is communicated with the external high-temperature flue gas recycling pipe, water is injected into the inside of the tank 1 through the water inlet pipe 11, the high-temperature flue gas first enters the inside of the filter box 201, and after passing through the filter screen 202, the filtered flue gas enters the gas conveying pipe 10 through the baffle mechanism 3, the diameter of the air vent 20 is gradually increased from the initial end to the terminal end, so that the high-temperature flue gas uniformly enters the inside of the rotating pipe 401.

[0062] Then, the high-temperature flue gas enters the five groups of heat exchange pipes 402 after entering the rotating pipe 401, the gear 1 602 is driven to rotate by the starting motor 601, the gear 1 602 and the meshing gear 2 603 drive the gear 2 603 to rotate, the gear 2 603 drives the rotating pipe 401 to rotate, thereby realizing heat exchange between the heat exchange pipe 402 and the water in the tank 1, when the flue gas inlet amount of the high-temperature flue gas increases, the liquid temperature rises and speeds up, at this time, the motor 601 speeds up, the heat exchange is accelerated to avoid waste of heat energy, at this time, the blade 502 drives the liquid after temperature rise, the rotating speed of the rotating pipe 401 also increases when the motor 601 speed increases, the heat exchange pipe 402 speeds up the heat exchange, at the same time, the rotating pipe 401 drives the sleeve 2 504 in the sleeve 1 503 to extend out, the extension amount of the sleeve 2 504 matches the rotating speed of the rotating pipe 401, the sleeve 2 504 drives the mixing plate 505 to extend out and drive the low-temperature liquid at the inner wall of the tank 1 to move to the heat exchange pipe 402, thereby improving the heat exchange efficiency.

[0063] Finally, the low-temperature flue gas after the exchange gradually increases the pressure in the rotating pipe 401 to reach the threshold value, and is discharged through the gas outlet 13 by opening the one-way valve 16, the high-temperature liquid after the exchange is discharged through the water outlet pipe 12, and the heat energy recycling is completed.

[0064] Compared with the related art, the heat energy recycling device provided by the application has the following beneficial effects:

[0065] The gradually expanding design of the air supply pipe 10 gradually increases the air hole 20, realizes uniform distribution of high-temperature flue gas, eliminates local overheating, the rotating pipe 401 is driven by centrifugal force to increase the speed of the mixing plate 505, and the low-temperature liquid is forced to flow to the area of the heat exchange pipe 402, which completely breaks the temperature stratification and improves the heat exchange efficiency. The speed of the motor 601 is linked with the flue gas flow, and the flue gas flow increases the speed, which increases the heat exchange and avoids waste of heat energy. The blade 502 synchronously drives away the high-temperature liquid to avoid its accumulation in the center area. The one-way valve 16 is automatically opened when the flue gas pressure increases. The position of the sleeve 504 is matched with the centrifugal force and the heat exchange efficiency, which matches different working conditions in the tank 1. The filter screen 202 is set to avoid impurities and particles from hindering heat exchange in the heat exchange pipe 402.

[0066] Second embodiment

[0067] Please refer to Figures 7-14 Based on the first embodiment of the present application, the second embodiment of the present application provides another heat energy recycling device. The second embodiment is only a preferred way of the first embodiment, and the implementation of the second embodiment does not affect the separate implementation of the first embodiment.

[0068] Specifically, the second embodiment of the present application provides a heat energy recycling device, which is different from the first embodiment. The baffle mechanism 3 is fixedly installed between the tank 1 and the filter box 201. The baffle mechanism 3 includes a baffle box 301, which is fixedly installed between the tank 1 and the filter box 201. The two sides of the baffle box 301 are respectively communicated with the connecting port 19 and the filter box 201. The bottom of the inner wall of the baffle box 301 is fixedly installed with a gas cylinder 302. The output end of the gas cylinder 302 is fixedly installed with a baffle 303 through a fixed plate. The baffle 303 is installed in adaptation with the filter screen 202.

[0069] One side of the gas outlet 13 is communicated with a discharge mechanism 7. The discharge mechanism 7 includes a connecting pipe 701, which is communicated with one side of the gas outlet 13. One end of the connecting pipe 701 is communicated with a three-way valve 702. One side of the three-way valve 702 is communicated with a discharge port 704. The top of the three-way valve 702 is communicated with a regenerative pipe 705. One side of the three-way valve 702 is provided with a three-way valve switch 703. The water inlet pipe 11 is located outside the tank 1, and the pipeline is arranged on the surface of the regenerative pipe 705.

[0070] The surface of the rotating pipe 401 is fixedly provided with a gear three 17, one side of the inner wall of the tank body 1 is rotatably provided with a gear shaft 21, one end of the gear shaft 21 penetrates through one side of the tank body 1 and extends to the inner wall of the filter box 201, and one end of the gear shaft 21 located in the tank body 1 is fixedly provided with a gear four 18, and the gear three 17 engages with the gear four 18.

[0071] The inner wall of the filter box 201 is rotatably provided with a cleaning mechanism 8, the cleaning mechanism 8 comprises a lead screw 801 rotatably provided on the inner wall of the filter box 201, one end of the lead screw 801 is fixedly connected with one end of the gear shaft 21, the surface of the lead screw 801 is threadedly connected with a sliding block 802, the bottom of the sliding block 802 is fixedly provided with a push plate 803, the inner wall of the filter box 201 is rotatably provided with a rotating shaft 804, one end of the rotating shaft 804 is fixedly provided with a disc 805, one side of the disc 805 is fixedly provided with a convex shaft 806, the convex shaft 806 is fittedly provided with the push plate 803, the bottom of the disc 805 is rotatably provided with a pendulum shaft 808 through two connecting frames 807, the surface of the pendulum shaft 808 is fixedly provided with a pendulum 810 through a pendulum rod 809, the inner wall of the filter box 201 is fixedly provided with a cylinder switch 811, and the push plate 803 is fittedly provided with the cylinder switch 811.

[0072] One side of the tank body 1 is fixedly provided with a cleaning mechanism 9, the cleaning mechanism 9 comprises a water pump 901 fixedly provided on one side of the tank body 1, the water suction end of the water pump 901 is communicated with the inside of the tank body 1 through a water suction pipe 902, the water outlet end of the water pump 901 is communicated with a water tank 904 through a water conveying pipe 903, the water conveying pipe 903 penetrates through one side of the filter box 201 and extends to the inside, the water tank 904 is fixedly provided on the inner wall of the filter box 201 and is fittedly provided with the filter screen 202, and the bottom of the water tank 904 is provided with a plurality of spray heads 905.

[0073] In actual use, the inside of the filter box 201 is provided with a partition plate to avoid that the rising of flue gas affects the working of the cleaning mechanism 8; the knocking position of the pendulum 810 is the center of the filter screen 202; and the spray head 905 is provided with five.

[0074] The working principle of the heat energy recycling device provided in the embodiment is as follows:

[0075] The one-way valve 16 normally opens to discharge low-temperature flue gas. As the amount of high-temperature flue gas entering the front end increases, the heat exchange efficiency increases, and when the four one-way valves 16 are fully open, the high-temperature flue gas is discharged, the flue gas pressure pushes the three-way valve switch 703 from the discharge port 704 to the regenerative tube 705, and the inlet water pipe 11 is wrapped around the surface of the regenerative tube 705 for preheating. The remaining heat after high-temperature flue gas heat exchange is used for preheating to avoid waste.

[0076] When cleaning the filter screen 202, as the amount of high-temperature flue gas intake increases, the rotational speed of the rotating tube 401 increases to avoid waste of thermal energy, the rotational speed of the gear three 17 increases, the gear three 17 engages with the gear four 18, the gear four 18 rotates to drive the lead screw 801 to rotate, the lead screw 801 drives the sliding block 802 to move, the sliding block 802 drives the push plate 803 to contact the convex shaft 806, the convex shaft 806 drives the disc 805 to rotate clockwise, the disc 805 drives the pendulum shaft 808 to rise clockwise through the connecting frame 807, and after the push plate 803 is separated from the convex shaft 806, the pendulum rod 809 and the pendulum 810 are released to fall and knock the center of the filter screen 202 to clean the attached dust. The sliding block 802 drives the push plate 803 to continue to move and contact the cylinder switch 811, the cylinder 302 is started to drive the baffle 303 to rise and block the filter screen 202, at this time the water pump 901 is started to pump warm water from the inside of the tank 1 to the filter screen 202 for washing through the nozzle 905 at the bottom of the water tank 904, after the cylinder switch 811 is separated, the cylinder 302 drives the baffle 303 to fall back while the water pump stops cleaning, and the solid impurities in the recovery tank 203 are manually cleaned periodically.

[0077] Thus, the intake amount increases, the motor 601 drives the rotating tube 401 to increase the heat exchange efficiency to avoid waste of thermal energy, the mixed plate 505 extends more to mix cold and hot water more uniformly, and the frequency of cleaning the filter screen 202 is faster.

[0078] Compared with the related art, the heat energy recycling device provided by the embodiment has the following beneficial effects:

[0079] By setting the one-way valve 16 to fully open when the high-temperature flue gas is overloaded, the three-way valve 702 is switched to the regenerative tube 705 to preheat the water in the inlet water pipe 11 using the remaining heat, the waste of direct flue gas discharge is eliminated, the amount of high-temperature flue gas intake increases, the motor 601 drives the rotating tube 401 to increase, the mixed plate 505 extends more to mix cold and hot water more uniformly, the lead screw 801 rotates faster to drive the pendulum 810 to clean the filter screen 202 more frequently, which matches the feature that the filter screen is more likely to be blocked when the intake amount is large, and the cylinder 302 drives the baffle 303 to rise to avoid the water flow from the nozzle 905 cleaning the filter screen 202 from flowing into the inside of the gas conveying pipe 10.

[0080] A high-value utilization method of lithium-containing waste material, comprising the following steps:

[0081] Step S1: grinding: grinding the lithium-containing waste material to a certain particle size to obtain fine material, the particle size is 60-325 mesh, wherein the lithium-containing waste material is various lithium-containing glass, various lithium-containing molecular sieve and other lithium-containing silicate, aluminosilicate or phosphoaluminic acid salt waste material;

[0082] Step S2: mixing: mixing the fine material obtained in step S1 with auxiliary materials in a certain proportion to obtain a mixture; the auxiliary materials include auxiliary material one and auxiliary material two, the auxiliary material one is one or more of lepidolite, spodumene and lithium clay; the auxiliary material two is one or more of sodium sulfate, potassium sulfate, calcium sulfate, calcium carbonate, calcium hydroxide, calcium oxide, iron sulfate, aluminum sulfate, ammonium sulfate and sulfuric acid;

[0083] Step S3: calcination: placing the mixture obtained in step S2 into a high-temperature furnace for high-temperature calcination, the calcination temperature is 800-1300℃, and the reaction time is 15-100 minutes, to obtain a clinker, and the high-temperature flue gas generated after high-temperature calcination of the high-temperature furnace is input into a heat energy recovery and recycling device for heat energy recovery treatment;

[0084] Step S4: leaching: leaching the clinker obtained in step S3 with water in a ratio of 0.5-2:1, the leaching time is 5-30 minutes, to obtain a leaching solution;

[0085] Step S5: impurity removal: removing impurities from the leaching solution obtained in step S4, first adding ammonia water, calcium oxide or caustic soda to the leaching solution to adjust the pH to 10-13, then adding soda ash according to the amount of calcium, and reacting for 20-120 minutes, wherein the excess of soda ash is 0-30%, and then filtering to obtain a purified solution;

[0086] Step S6: concentration: concentrating the purified solution obtained in step S5 to a lithium oxide concentration of 20-60g / L to obtain a purified concentrated solution;

[0087] Step S7: lithium precipitation: precipitating lithium from the purified concentrated solution obtained in step S6, adding soda ash solution to the purified concentrated solution, centrifuging, drying and packaging to obtain lithium carbonate product; adding sodium hydroxide solution to the purified concentrated solution, then removing sodium sulfate by freezing, concentrating, centrifuging to obtain lithium hydroxide, drying, crushing and packaging to obtain lithium hydroxide product; adding calcium chloride to the purified concentrated solution, filtering to remove calcium sulfate, and the obtained lithium chloride solution is concentrated to precipitate lithium chloride, dried and packaged to obtain lithium chloride product.

[0088] Compared with the related art, the lithium-containing waste material high-value utilization method provided by the present application has the following beneficial effects:

[0089] The method can simultaneously perform high-value recycling treatment on different lithium-containing waste, changes waste into treasure, saves resources, and partially relieves the problem of lithium resource shortage; the lithium salt prepared by the method is a battery-grade lithium carbonate, lithium chloride or lithium hydroxide or other basic lithium salt; the recovery rate of lithium in the method is above 95%; the production process of the method is simple, the cost is low, the product quality is stable, and the industrialized production is easy.

[0090] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A heat energy recovery and reuse device, comprising a tank, the bottom of which is fixedly installed on the ground by two supports, a water inlet pipe connected to the top of the tank, a water outlet pipe connected to the bottom of the tank, a connection port on one side of the tank, and a vent on the other side of the tank, characterized in that... It also includes: an air inlet pipe for inputting high-temperature flue gas; A filtration mechanism, wherein the filtration mechanism is used to filter impurities in high-temperature flue gas; A baffle mechanism is used to convey filtered high-temperature flue gas to the connection port; A heat exchange mechanism is rotatably mounted on the inner wall of the tank. The heat exchange mechanism includes a rotating tube, which is rotatably mounted on the inner wall of the tank. One end of the rotating tube is connected to one side of the connection port, and five sets of heat exchange tubes are connected to the surface of the rotating tube. The mixing mechanism comprises four fixedly mounted on the surface of the rotating tube and located between every two sets of heat exchange tubes. Each mixing mechanism includes a fixing ring, which is fixedly mounted on the surface of the rotating tube and located between two sets of heat exchange tubes. Four blades are fixedly mounted on the surface of the fixing ring, and four sleeves are fixedly mounted on the surface of the fixing ring. Each of the four sleeves is slidably connected to a sleeve, and a mixing plate is fixedly mounted on the top of each of the four sleeves. A drive mechanism is used to drive the rotating tube to rotate; A gas supply pipe is fixedly installed at one end of the rotating tube that communicates with the connection port. The gas supply pipe is connected to the connection port, and several ventilation holes are opened on the surface of the gas supply pipe. One side of the filtration mechanism is connected to one end of the air intake pipe. The filtration mechanism includes a filter box. One side of the filter box is connected to one end of the air intake pipe. A filter screen is fixedly installed in a circular groove on the other side of the filter box. A recycling box is connected to the bottom of the filter box. Four one-way valves are fixedly installed on one side of the rotating tube, and the diameter of the vent hole gradually increases near the end of the gas supply pipe. The baffle mechanism is fixedly installed between the tank and the filter box. The baffle mechanism includes a baffle box, which is fixedly installed between the tank and the filter box. The two sides of the baffle box are respectively connected to the connection port and the filter box. A cylinder is fixedly installed at the bottom of the inner wall of the baffle box. A baffle is fixedly installed at the output end of the cylinder through a fixing plate. The baffle is adapted to the filter screen.

2. The heat energy recovery and reuse device according to claim 1, characterized in that, The drive mechanism is fixedly installed on one side of the tank. The drive mechanism includes a motor, which is fixedly installed on one side of the tank. The output shaft of the motor passes through one side of the tank and extends into the interior. A gear one is fixedly installed on the output shaft of the motor located inside the tank. A gear two is fixedly installed on the surface of the rotating tube. The gear one meshes with the gear two.

3. The heat energy recovery and reuse device according to claim 1, characterized in that, One side of the air outlet is connected to a discharge mechanism, which includes a connecting pipe connected to one side of the air outlet. One end of the connecting pipe is connected to a three-way valve, one side of the three-way valve is connected to a discharge port, the top of the three-way valve is connected to a heat recovery pipe, and a three-way valve switch is provided on one side of the three-way valve. The water inlet pipe is located outside the tank and is installed on the surface of the heat recovery pipe.

4. The heat energy recovery and reuse device according to claim 2, characterized in that, Gear 3 is fixedly installed on the surface of the rotating tube, and a gear shaft is rotatably installed on one side of the inner wall of the tank. One end of the gear shaft passes through one side of the tank and extends to the inner wall of the filter box. Gear 4 is fixedly installed at the end of the gear shaft located inside the tank, and gear 3 meshes with gear 4.

5. A heat energy recovery and reuse device according to claim 4, characterized in that, A cleaning mechanism is rotatably mounted on the inner wall of the filter box. The cleaning mechanism includes a lead screw rotatably mounted on the inner wall of the filter box. One end of the lead screw is fixedly connected to one end of the gear shaft. A slider is threaded onto the surface of the lead screw. A push plate is fixedly mounted on the bottom of the slider. A rotating shaft is rotatably mounted on the inner wall of the filter box. A disc is fixedly mounted on one end of the rotating shaft. A convex shaft is fixedly mounted on one side of the disc. The convex shaft is adapted to the push plate. A pendulum shaft is rotatably mounted on the bottom of the disc through two connecting brackets. A pendulum is fixedly mounted on the surface of the pendulum shaft through a pendulum rod. A cylinder switch is fixedly mounted on the inner wall of the filter box. The push plate is adapted to the cylinder switch.

6. A heat energy recovery and reuse device according to claim 4, characterized in that, A cleaning mechanism is fixedly installed on one side of the tank. The cleaning mechanism includes a water pump, which is fixedly installed on one side of the tank. The pump's suction end is connected to the inside of the tank through a suction pipe, and the pump's outlet end is connected to a water tank through a water supply pipe. The water supply pipe passes through one side of the filter box and extends into the interior. The water tank is fixedly installed on the inner wall of the filter box and is adapted to the filter screen. Several nozzles are provided at the bottom of the water tank.

7. A method for high-value utilization of lithium-containing waste, requiring the use of a heat energy recovery and reuse device as described in any one of claims 1-6, characterized in that, Includes the following steps; Step S1: Grinding: Grind lithium-containing waste to a certain particle size to obtain fine material with a particle size of 60-325 mesh. The lithium-containing waste includes various lithium-containing glasses, various lithium-containing molecular sieves, and other lithium-containing silicate, aluminosilicate, or phosphoaluminate waste. Step S2: Mixing: The fine material obtained in step S1 is mixed with the auxiliary materials in a certain proportion to obtain a mixture; the auxiliary materials include auxiliary material one and auxiliary material two. Auxiliary material one is one or more of lepidolite, spodumene, and lithium clay; auxiliary material two is one or more of sodium sulfate, potassium sulfate, calcium sulfate, calcium carbonate, calcium hydroxide, calcium oxide, ferric sulfate, aluminum sulfate, ammonium sulfate, and sulfuric acid. Step S3: Calcination: The mixture obtained in step S2 is placed in a high-temperature furnace for high-temperature calcination at a temperature of 800-1300℃ for a reaction time of 15-100 minutes to obtain clinker. The high-temperature flue gas generated after high-temperature calcination in the high-temperature furnace is fed into a heat energy recovery and reuse device for heat energy recovery treatment. Step S4: Leaching: Leach the clinker obtained in step S3 and water at a ratio of 0.5-2:1 for 5-30 minutes to obtain leachate; Step S5: Impurity Removal: Remove impurities from the leachate obtained in step S4. First, add ammonia, calcium oxide or caustic soda to the leachate to adjust the pH to 10-13. Then, add soda ash according to the amount of calcium. React for 20-120 minutes, with 0-30% excess soda ash. After filtration, obtain the purified solution. Step S6: Concentration: The purified solution obtained in step S5 is concentrated to a lithium oxide concentration of 20-60 g / L to obtain a purified concentrated solution. Step S7: Lithium Deposition: The purified concentrate obtained in Step S6 is subjected to lithium deposition. Soda ash solution is added to the purified concentrate, centrifuged, dried and packaged to obtain lithium carbonate product; sodium hydroxide solution is added to the purified concentrate, and sodium sulfate is removed by freezing, concentrated, and lithium hydroxide is separated by centrifugation, dried, pulverized and packaged to obtain lithium hydroxide product; calcium chloride is added to the purified concentrate, calcium sulfate is removed by filtration, and the resulting lithium chloride solution is concentrated to precipitate lithium chloride, dried and packaged to obtain lithium chloride product.

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