Heat recovery device for multi-stage rotary kiln

Abstract

The invention discloses a heat recovery device for a multi-stage rotary kiln, which belongs to the technical direction of heat recovery, and comprises the multi-stage rotary kiln, one end of the multi-stage rotary kiln is fixedly provided with a ventilation pipe, the ventilation pipe is a three-orifice ventilation pipe, the bottom of the multi-stage rotary kiln is detachably provided with a mounting rack, and the mounting rack is provided with an opening. A first driving assembly and a third driving assembly are detachably mounted on the two sides of one end of the mounting frame, through cooperative use of the two motors and the two fans, the heat dissipation mode can be changed according to different working temperatures, the two fans are driven to conduct circulating air cooling heat dissipation while the multi-stage rotary kiln rotates, no extra heat dissipation assembly is needed, and the heat dissipation efficiency is improved. The energy consumption of a factory is reduced, meanwhile, hot air can be prevented from being accumulated in a production workshop, when the multi-stage rotary kiln operates for a long time, the air circulation speed is increased, the heat dissipation efficiency is improved, water cooling is controlled, cooling water in the high-temperature state is collected in a centralized mode for subsequent secondary utilization, and waste of water resources is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of heat recovery, and specifically relates to a heat recovery device for a multi-stage rotary kiln. Background Art

[0002] A rotary kiln refers to a rotary calcining kiln (commonly known as a rotary kiln). Its appearance is similar to a rotary bed, so it is also called a rotary bed kiln. It belongs to the category of building materials equipment. Rotary kilns can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to the materials they process. Cement kilns are mainly used to calcine cement clinker, and are divided into two categories: dry-process cement kilns and wet-process cement kilns. Metallurgical chemical kilns are mainly used for magnetization roasting of lean iron ore in steel plants in the metallurgical industry.

[0003] The existing patent publication number CN 220472240 U discloses a rotary kiln cooling heat recovery device, comprising a rotary kiln roller ring and an end plate, wherein a rotary kiln cylinder is fixedly installed inside the rotary kiln roller ring, a side end of the rotary kiln cylinder is fixedly connected with a wind collecting hood, an upper end of the wind collecting hood is fixedly connected with a wind collecting hood end plate seal, a lower end of the rotary kiln roller ring is fixedly connected with a support device assembly, a guide plate is fixedly connected to the outside of the end plate, a wind chamber is provided at the lower part of the guide plate, an end of the guide plate and the wind chamber facing away from the end plate is fixedly connected with an air duct, an exhaust pipe is fixedly connected to the lower part of the end plate, the exhaust pipe passes through the end plate to the inside of the wind chamber, an end of the exhaust pipe facing away from the end plate is fixedly connected with a drain valve, and a baffle is fixedly connected to the wind collecting hood, so that only the inhaled natural wind can be evenly distributed, and the heat generated inside and outside the rotary kiln cannot be recovered separately, so the efficiency is not high and some improvements are needed.

[0004] Therefore, it is necessary to design a heat recovery device for a multi-stage rotary kiln with strong practicality. Summary of the invention

[0005] The purpose of the present invention is to provide a heat recovery device for a multi-stage rotary kiln in view of the existing device, so as to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a heat recovery device for a multi-stage rotary kiln, comprising a multi-stage rotary kiln, a ventilation pipe is fixedly installed at one end of the multi-stage rotary kiln, the ventilation pipe is a three-pipe ventilation pipe, one group of pipe openings of the ventilation pipe is connected to the multi-stage rotary kiln, another group of pipe openings of the ventilation pipe is connected to the feed port of the multi-stage rotary kiln, the third group of pipe openings of the ventilation pipe is externally connected to the exhaust gas discharge device in the workshop, an air volume control valve is fixedly installed inside the ventilation pipe, a mounting frame is detachably installed at the bottom of the multi-stage rotary kiln, a first drive assembly and a third drive assembly are detachably installed on both sides of one end of the mounting frame, and a second drive assembly and a fourth drive assembly are detachably installed on both sides of the other end, and a recovery assembly, a ventilation assembly, and a cooling assembly are also arranged at the bottom of the mounting frame; The recovery component includes an operating table, a water outlet pipe, a water inlet pipe, a water pump, a first placement seat, a second placement seat, a third placement seat, a first temperature sensor, a second temperature sensor, and a heat conductive rod. The operating table is fixedly installed at the bottom of the mounting frame, and one side of the interior of the operating table is hollow. The water outlet pipe is fixedly installed at one side of the bottom of the operating table, the water inlet pipe is fixedly installed at one side of the interior of the operating table, the water pump is fixedly installed on the water inlet pipe, the first placement seat is fixedly installed at one end of the operating table, the second placement seat is fixedly installed at the other end of the operating table, the third placement seat is fixedly installed at one side of the operating table, the first temperature sensor is fixedly installed at one end of the interior of the operating table, the second temperature sensor is fixedly installed at the other end of the interior of the operating table, and several groups of heat conductive rod arrays are installed on the inner bottom surface of the operating table.

[0007] The present invention further illustrates that the first driving assembly includes a first motor, a first mounting seat, a first rotating wheel, and a first fan. The first motor is fixedly mounted on the second placement seat. Two groups of the first mounting seats are installed at one end of the mounting frame at intervals. Both ends of the first rotating wheel are rotatably connected to the two groups of first mounting seats. The first fan is detachably mounted on one side of the two groups of first mounting seats. The rotating shaft of the first fan is connected to one end of the first rotating wheel. The rotating shaft of the first motor is connected to the other end of the first rotating wheel. The wheel surface of the first rotating wheel is in contact with the multi-stage rotary kiln.

[0008] The present invention further illustrates that the second driving assembly includes a second motor, a second mounting seat, a second rotating wheel, a first gear, a second gear, and a second fan. The second motor is fixedly mounted on the first placement seat. Two groups of the second mounting seats are installed at an interval on the other end of the mounting frame. Both ends of the second rotating wheel are rotatably connected to the two groups of second mounting seats. The first gear is detachably mounted on one end of the second rotating wheel. The second gear is detachably mounted on one side of the second mounting seat, corresponding to the first gear. The second gear is meshed with the first gear. A rotating seat is provided on the second mounting seat, corresponding to the position of the second gear. The second fan is detachably mounted on the mounting frame, corresponding to the position of the second gear. The rotating shaft of the second fan is connected to the second gear. The rotating shaft of the second motor is connected to the other end of the second rotating wheel. The wheel surface of the second rotating wheel is in contact with the multi-stage rotary kiln.

[0009] The present invention further describes that a third drive assembly and a fourth drive assembly are correspondingly arranged on the other side of the mounting frame, the position of the third drive assembly corresponds to the position of the first drive assembly and the structure is the same, and the position of the fourth drive assembly corresponds to the second drive assembly and the structure is the same.

[0010] The present invention further illustrates that the ventilation assembly includes a first air compressor, a first water bucket, a second water bucket, a first electric valve, a spray rack, a first water pipe, a second water pipe, and a second electric valve. The first air compressor, the first water bucket, and the second water bucket are respectively placed on a third placement seat at intervals. The first water bucket is equipped with a pump. Two groups of spray racks are installed on the mounting rack at intervals. The first water pipe connects the first air compressor, the first water bucket, and the spray rack. One end of the second water pipe is connected to the first water pipe, and the other end is connected to the second water bucket. The second electric valve is fixedly installed inside the second water pipe. The bottom of the second water bucket is connected to the water inlet pipe, and the first electric valve is fixedly installed inside the water inlet pipe.

[0011] The present invention further illustrates that the cooling component includes a second air compressor, a ventilation pipe, and a jet rack. The second air compressor is fixedly mounted on a third placement seat and is located on one side of the first air compressor. The jet rack is detachably mounted on a mounting rack and is located on one side of the spray rack. One end of the ventilation pipe is connected to the second air compressor, and the other end is connected to the jet rack.

[0012] The present invention further describes that a liquid level sensor is fixedly installed on one side of the inner wall of the operating table.

[0013] The present invention further illustrates that the multi-stage rotary kiln is placed on an operating platform in a production workshop.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention can change the heat dissipation mode according to different working temperatures through the coordinated use of two groups of motors, two groups of fans, the first temperature sensor and the equipment program. When the multi-stage rotary kiln is at a normal working temperature, the two groups of fans are driven to perform circulating air cooling and heat dissipation while the multi-stage rotary kiln is rotating, without the need to use additional heat dissipation components, thereby reducing the energy consumption of the factory and preventing heat from accumulating inside the production workshop to affect the working environment. When the multi-stage rotary kiln is running for a long time, the air circulation speed is accelerated, the heat dissipation efficiency is improved, and water cooling is controlled to cool down, and the cooling water in a high temperature state is collected centrally for subsequent secondary utilization, thereby reducing the waste of water resources. Through the coordinated use of several groups of heat-conducting rods, the second temperature sensor and the equipment program, heat recovery operation can be performed while ventilating and dissipating heat, and heat is introduced into several groups of heat-conducting rods to heat the collected cooling water, so that it is heated up again for subsequent cleaning operations. When the water temperature is too low, the air flow rate is reduced to allow the hot air to fully contact several groups of heat-conducting rods, thereby improving the heating efficiency of the cooling water. When the water temperature reaches the standard, the hot water is centrally stored for subsequent secondary use, thereby reducing the waste of water resources while reducing the energy consumption of the factory, achieving the effect of energy conservation and emission reduction, and also reducing the production cost of the factory; Through the coordinated use of the air volume control valve, the first temperature sensor and the equipment program, the hot air discharged during the production of the multi-stage rotary kiln can be recovered and used for the preheating of the material for a second time, which can avoid the low material temperature in cold weather affecting the production temperature of the multi-stage rotary kiln and improve the production efficiency of the multi-stage rotary kiln. After the production of the multi-stage rotary kiln is completed, it can be automatically cleaned and the heated cooling water can be reused for the cleaning of the multi-stage rotary kiln, thereby reducing the consumption of resources and reducing the cost expenditure of factory maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is another perspective overall structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the internal structure of the operating table of the present invention; Figure 4 is a schematic diagram of the ventilation assembly structure of the present invention; Figure 5 is a schematic structural diagram of a ventilation assembly from another perspective of the present invention; Figure 6 It is a schematic diagram of the structure of the cooling component of the present invention; Figure 7 The present invention Figure 1 A magnified schematic diagram of the structure in area A; Figure 8 The present invention Figure 1 A magnified schematic diagram of the structure in area B; Fig. 9 The present invention Figure 2 Schematic diagram of the structure in area C; Fig.10 is a schematic diagram of a third drive assembly of the present invention; Fig.11 is a schematic diagram of a fourth drive assembly of the present invention; Fig.12 It is a schematic diagram of the position of the electric valve of the present invention.

[0016] In the figure: 1. multi-stage rotary kiln; 11. ventilation pipe; 111. air volume control valve; 12. mounting frame; 13. first drive assembly; 131. first motor; 132. first mounting seat; 133. first rotating wheel; 134. first fan; 14. second drive assembly; 141. second motor; 142. second mounting seat; 143. second rotating wheel; 144. first gear; 145. second gear; 146. second fan; 15. third drive assembly; 16. fourth drive assembly; 17. liquid level sensor; 2. Recovery component; 21. Operation table; 211. Water outlet pipe; 212. Water inlet pipe; 213. Water pump; 22. First placement seat; 23. Second placement seat; 24. Third placement seat; 25. First temperature sensor; 251. Second temperature sensor; 26. Heat conducting rod; 3. Ventilation assembly; 31. First air compressor; 32. First water bucket; 33. Second water bucket; 331. First electric valve; 34. Spray rack; 341. First water pipe; 342. Second water pipe; 343. Second electric valve; 4. Cooling assembly; 41. Second air compressor; 42. Ventilation pipe; 43. Jet rack. DETAILED DESCRIPTION

[0017] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-12The present invention provides a technical solution: a heat recovery device for a multi-stage rotary kiln, comprising a multi-stage rotary kiln 1, the multi-stage rotary kiln 1 is placed on an operating platform in a production workshop, a ventilation pipe 11 is fixedly installed at one end of the multi-stage rotary kiln 1, the ventilation pipe 11 is a three-pipe ventilation pipe, one group of pipe openings of the ventilation pipe 11 is connected to the multi-stage rotary kiln 1, another group of pipe openings of the ventilation pipe 11 is connected to the feed port of the multi-stage rotary kiln 1, the third group of pipe openings of the ventilation pipe 11 is externally connected to an exhaust gas discharge device in the workshop, an air volume control valve 111 is fixedly installed inside the ventilation pipe 11 for coordinating and controlling the air outlet direction, a mounting frame 12 is detachably installed at the bottom of the multi-stage rotary kiln 1 for placing the multi-stage rotary kiln 1, a first drive assembly 13 and a third drive assembly 15 are detachably installed on both sides of one end of the mounting frame 12, and a second drive assembly 14 and a fourth drive assembly 16 are detachably installed on both sides of the other end, and a recovery assembly 2, a ventilation assembly 3, and a cooling assembly 4 are also arranged at the bottom of the mounting frame 12; The recovery component 2 includes an operating table 21, a water outlet pipe 211, a water inlet pipe 212, a water pump 213, a first placement seat 22, a second placement seat 23, a third placement seat 24, a first temperature sensor 25, a second temperature sensor 251, and a heat conducting rod 26. The operating table 21 is fixedly mounted on the bottom of the mounting frame 12, and one side of the inner part of the operating table 21 is hollow. The water outlet pipe 211 is fixedly mounted on one side of the bottom of the operating table 21 for discharging waste water. The water inlet pipe 212 is fixedly mounted on one side of the inner part of the operating table 21. The water pump 213 is fixedly mounted on On the water inlet pipe 212, it is used to pump out the water flow. The first placement seat 22 is fixedly installed at one end of the operating table 21, the second placement seat 23 is fixedly installed at the other end of the operating table 21, and the third placement seat 24 is fixedly installed at one side of the operating table 21. The first temperature sensor 25 is fixedly installed at one end inside the operating table 21, and the second temperature sensor 251 is fixedly installed at the other end inside the operating table 21. The two groups of temperature sensors are used to cooperate in detecting the temperature of the water body. A plurality of groups of heat conducting rods 26 are arrayed on the inner bottom surface of the operating table 21 to recover heat; A liquid level sensor 17 is also fixedly mounted on one side of the inner wall of the operating table 21; The first driving assembly 13 includes a first motor 131, a first mounting seat 132, a first rotating wheel 133, and a first fan 134. The first motor 131 is fixedly mounted on the second placement seat 23. Two groups of first mounting seats 132 are installed at one end of the mounting frame 12 at intervals. Both ends of the first rotating wheel 133 are rotatably connected to the two groups of first mounting seats 132. The first fan 134 is detachably mounted on one side of the two groups of first mounting seats 132. The rotating shaft of the first fan 134 is connected to one end of the first rotating wheel 133. The rotating shaft of the first motor 131 is connected to the other end of the first rotating wheel 133. The wheel surface of the first rotating wheel 133 is in contact with the multi-stage rotary kiln 1, and is used to perform air cooling and heat dissipation on the multi-stage rotary kiln 1 during the process of driving the multi-stage rotary kiln 1 to rotate, and to guide the heat to subsequent components. The second driving assembly 14 includes a second motor 141, a second mounting seat 142, a second rotating wheel 143, a first gear 144, a second gear 145, and a second fan 146. The second motor 141 is fixedly mounted on the first placement seat 22. Two groups of second mounting seats 142 are installed at the other end of the mounting frame 12 at intervals. Both ends of the second rotating wheel 143 are rotatably connected to the two groups of second mounting seats 142. The first gear 144 is detachably mounted on one end of the second rotating wheel 143. The second gear 145 is detachably mounted on one side of the second mounting seat 142, corresponding to the first gear 144. The second gear 145 is detachably mounted on the second side of the second mounting seat 142. The first gears 144 mesh with each other, and a rotating seat is provided on the second mounting seat 142 corresponding to the position of the second gear 145 (not shown in the figure) to facilitate the rotation of the second gear 145. The second fan 146 is detachably mounted on the mounting frame 12, corresponding to the position of the second gear 145. The rotating shaft of the second fan 146 is connected to the second gear 145, and the rotating shaft of the second motor 141 is connected to the other end of the second rotating wheel 143. The wheel surface of the second rotating wheel 143 is in contact with the multi-stage rotary kiln 1, and is used to air-cool and dissipate heat to the multi-stage rotary kiln 1 during the process of driving the multi-stage rotary kiln 1 to rotate, and to guide the heat to the subsequent components; A third driving assembly 15 and a fourth driving assembly 16 are also correspondingly disposed on the other side of the mounting frame 12. The position of the third driving assembly 15 corresponds to the position of the first driving assembly 13 and has the same structure. The position of the fourth driving assembly 16 corresponds to the position of the second driving assembly 14 and has the same structure. The ventilation assembly 3 includes a first air compressor 31, a first water bucket 32, a second water bucket 33, a first electric valve 331, a spray rack 34, a first water pipe 341, a second water pipe 342, and a second electric valve 343. The first air compressor 31, the first water bucket 32, and the second water bucket 33 are respectively placed on the third placement seat 24 at intervals. The first water bucket 32 ​​is equipped with a pump (not shown in the figure). Two groups of spray racks 34 are installed on the mounting frame 12 at intervals. The first water pipe 341 connects the first air compressor 31, the first water bucket 32, and the spray rack 34. One end of the second water pipe 342 is connected to the first water pipe 341, and the other end is connected to the second water bucket 33. The second electric valve 343 is fixedly installed inside the second water pipe 342 for controlling the circulation of water. The bottom of the second water bucket 33 is connected to the water inlet pipe 212 for storing hot water. The first electric valve 331 is fixedly installed inside the water inlet pipe 212 for controlling the circulation of water. The cooling assembly 4 includes a second air compressor 41, a vent pipe 42, and an injection rack 43. The second air compressor 41 is fixedly mounted on the third placement seat 24 and is located on one side of the first air compressor 31. The injection rack 43 is detachably mounted on the mounting frame 12 and is located on one side of the spray rack 34. One end of the vent pipe 42 is connected to the second air compressor 41, and the other end is connected to the injection rack 43. The multi-stage rotary kiln 1 is powered by an external workshop power supply to provide power to drive the internal components; The multi-stage rotary kiln 1 is also equipped with an equipment program, which can control the opening and closing of the air volume control valve 111, the start and stop of the two motors, the opening and closing of the water pump 213, the opening and closing of the two air compressors, the opening and closing of the two electric valves, and the start and stop of the built-in pump of the first water bucket 32; The air volume control valve 111, two sets of motors, the water pump 213, two sets of air compressors, two sets of electric valves, two sets of temperature sensors, the built-in pump of the first water bucket 32, and the liquid level sensor 17 are all connected to the equipment program signal.

[0019] Cooling operation: When the multi-stage rotary kiln 1 is needed for daily production, the staff performs heat dissipation operation through the equipment program control. The staff first turns on the power of the workshop. At this time, the multi-stage rotary kiln 1 starts, and the equipment program starts. The equipment program detects the value of the first temperature sensor 25 during the operation of the multi-stage rotary kiln 1 and compares it with the set value. The equipment program sets the value of the first temperature sensor 25 to A1, A2, and A3, A1 is the minimum value, and A3 is the maximum value, which can be adjusted according to specific needs. The speeds of the two groups of motors are V1 and V2, V1 is the minimum value, and V2 is the maximum value, which can be adjusted according to specific needs. The pump air values ​​of the second air compressor 41 are B1 and B2, B1 is the minimum value, and B2 is the maximum value, which can be adjusted according to specific needs. Adjustment is performed. When the equipment program detects that the value of the first temperature sensor 25 is A1, the equipment program determines that the multi-stage rotary kiln 1 is at a normal operating temperature. The equipment program controls the two groups of motors to start, and the speed is adjusted to V1. The first motor 131 drives the first rotating wheel 133 to rotate, and the first rotating wheel 133 drives the first fan 134 to rotate forward, and the multi-stage rotary kiln 1 is cooled and dissipated during its rotation. The second motor 141 drives the second rotating wheel 143 to rotate, and the second rotating wheel 143 drives the first gear 144 to rotate. The first gear 144 and the second gear 145 are meshed with each other, and the second gear 145 drives the second fan 146 to rotate in the opposite direction, so that the air near the multi-stage rotary kiln 1 circulates and performs air cooling and heat dissipation operations on it. When the equipment program detects that the value of the first temperature sensor 25 is A2, the equipment program determines that the multi-stage rotary kiln 1 has been working for a long time and a lot of heat has accumulated. The equipment program controls the speed of the two motors to be adjusted to V2, the first motor 131 drives the first rotating wheel 133 to rotate, the first rotating wheel 133 drives the first fan 134 to rotate forward, and the multi-stage rotary kiln 1 is cooled and dissipated during its rotation. The second motor 141 drives the second rotating wheel 143 to rotate, the second rotating wheel 143 drives the first gear 144 to rotate, the first gear 144 and the second gear 145 are meshed with each other, and the second gear 145 drives the second fan 146 to rotate in the opposite direction, thereby increasing the speed of the two sets of fans, accelerating the circulation of air near the multi-stage rotary kiln 1, and performing air cooling and heat dissipation operations on it. The equipment program controls the second air compressor 41 to start, the pumping value is B1, the second air compressor 41 pumps compressed air into the ventilation pipe 42, and then sprays it from the jet frame 43 to the surface of the multi-stage rotary kiln 1, and blows the hot air downward to the two sets of fans, thereby improving the efficiency of ventilation and heat dissipation; When the equipment program detects that the value of the first temperature sensor 25 is A3, the equipment program determines that the multi-stage rotary kiln 1 is in a high temperature state, and the equipment program controls the pumping value of the second air compressor 41 to be increased to B2, the first air compressor 31 is turned on, the second electric valve 343 is in a closed state, and the built-in pump of the first water bucket 32 ​​is started. At this time, the clean water in the first water bucket 32 ​​will be pumped into the first water pipe 341, and the first air compressor 31 will pump compressed air into the first water pipe 341, so that the clean water is pressurized and sprayed from the two groups of spray racks 34 to the surface of the multi-stage rotary kiln 1, and the temperature is quickly reduced to avoid the accumulation of high-temperature gas inside the production workshop to affect the working environment. The sprayed clean water will flow downward into the operating table 21 for centralized collection; By using two groups of motors, two groups of fans, the first temperature sensor 25 and the equipment program in coordination, the heat dissipation mode can be changed according to different working temperatures. When the multi-stage rotary kiln 1 is at a normal working temperature, the two groups of fans are driven to perform circulating air cooling and heat dissipation while the multi-stage rotary kiln 1 is rotating. No additional heat dissipation components are needed, which reduces the energy consumption of the factory and prevents heat from accumulating inside the production workshop to affect the working environment. When the multi-stage rotary kiln 1 is running for a long time, the air circulation speed is accelerated, the heat dissipation efficiency is improved, and water cooling is controlled to collect cooling water in a high temperature state for subsequent secondary utilization, thereby reducing the waste of water resources.

[0020] Heat recovery operation: During the above operation, the equipment program controls the heat recovery operation. The equipment program sets the temperature value of the second temperature sensor 251 to M1, M2, and M3, where M1 is the minimum value and M3 is the maximum value, which can be adjusted according to specific needs. During the above ventilation and heat dissipation operation, the first fan 134 blows the hot air to the second fan 146. At this time, the hot air will pass through several groups of heat conducting rods 26, and several groups of heat conducting rods 26 will introduce heat into the clean water stored in the operating table 21, and the heat generated by the multi-stage rotary kiln 1 will be recovered for secondary heating of cooling water. When the temperature value detected by the second temperature sensor 251 is M1, the equipment program determines that the heat recovery is slow and the water temperature is low. The equipment program controls the second air compressor 41 to close, slow down the air flow rate, and allow the hot air to fully contact the cooling water. Touch several groups of heat-conducting rods 26 to increase the heating speed and quickly heat up the water. When the temperature value detected by the second temperature sensor 251 is M2, the equipment program determines that the water temperature is normal, the second air compressor 41 is turned on, and the pump air value is adjusted to B1, ensuring the effect of heat recovery while ensuring ventilation and heat dissipation. When the temperature value detected by the second temperature sensor 251 is M3 and the cooling water level reaches the level sensor 17, the equipment program determines that the cooling water temperature rises to the end, and the equipment program controls the first electric valve 331 to open, the water pump 213 to open, and the water pump 213 to pump the hot water in the operating table 21 into the second water bucket 33 for storage, so as to be used for subsequent secondary use and cleaning of the multi-stage rotary kiln 1. After the extraction is completed, the equipment program controls the first electric valve 331 to close, and the water pump 213 to close; Through the coordinated use of several groups of heat-conducting rods 26, the second temperature sensor 251 and the equipment program, heat recovery operation can be performed while ventilation and heat dissipation are carried out. Heat is introduced into several groups of heat-conducting rods 26 to heat the collected cooling water, so that it is heated up again for subsequent cleaning operations. When the water temperature is too low, the air flow rate is reduced to allow the hot air to fully contact several groups of heat-conducting rods 26, thereby improving the heating efficiency of the cooling water. When the water temperature reaches the standard, the hot water is centrally stored for subsequent secondary use, thereby reducing the waste of water resources while reducing the factory's energy consumption, achieving the effect of energy conservation and emission reduction, and at the same time, it can also reduce the factory's production costs.

[0021] Preheat cleaning operation: During the above operation, the equipment program controls the preheating operation. When the equipment program detects that the value of the first temperature sensor 25 is A2, the equipment program controls the preheating operation. The equipment program controls the air volume control valve 111 to open, and the hot air discharged from the multi-stage rotary kiln 1 is recovered to the feed inlet, and the material at the feed inlet is preheated to avoid the low material temperature in cold weather affecting the production temperature of the multi-stage rotary kiln 1, thereby improving the production efficiency of the multi-stage rotary kiln 1. After the production of the multi-stage rotary kiln 1 is finished, the staff performs a cleaning operation through the equipment program control. The equipment program controls the first air compressor 31 and the second electric valve 343 to open, and the clean water in the second water bucket 33 is pumped into the first water pipe 341. The first air compressor 31 pumps compressed air into the first water pipe 341, so that the hot water is pressurized and sprayed from the two groups of spray racks 34 to the surface of the multi-stage rotary kiln 1 to perform a cleaning operation on it; By using the air volume control valve 111, the first temperature sensor 25 and the equipment program in coordination, the hot air discharged during the production of the multi-stage rotary kiln 1 can be recovered and used for the preheating of the material for a second time, which can prevent the low material temperature in cold weather from affecting the production temperature of the multi-stage rotary kiln 1, thereby improving the production efficiency of the multi-stage rotary kiln 1. After the production of the multi-stage rotary kiln 1 is completed, it can be automatically cleaned, and the heated cooling water can be reused for the cleaning of the multi-stage rotary kiln 1, thereby reducing the consumption of resources and reducing the cost expenditure during factory maintenance.

[0022] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat recovery device for a multi-stage rotary kiln, comprising a multi-stage rotary kiln (1), characterized in that: A ventilation pipe (11) is fixedly mounted at one end of the multi-stage rotary kiln (1); the ventilation pipe (11) is a three-pipe ventilation pipe; one group of pipe openings of the ventilation pipe (11) is connected to the multi-stage rotary kiln (1); another group of pipe openings of the ventilation pipe (11) is connected to the feed port of the multi-stage rotary kiln (1); the third group of pipe openings of the ventilation pipe (11) is externally connected to an exhaust gas discharge device in a workshop; an air volume control valve (111) is fixedly mounted inside the ventilation pipe (11); a mounting frame (12) is detachably mounted at the bottom of the multi-stage rotary kiln (1); a first drive assembly (13) and a third drive assembly (15) are detachably mounted on both sides of one end of the mounting frame (12); and a second drive assembly (14) and a fourth drive assembly (16) are detachably mounted on both sides of the other end; a recovery assembly (2), a ventilation assembly (3), and a cooling assembly (4) are also arranged at the bottom of the mounting frame (12); The recovery component (2) comprises an operating table (21), a water outlet pipe (211), a water inlet pipe (212), a water pump (213), a first placement seat (22), a second placement seat (23), a third placement seat (24), a first temperature sensor (25), a second temperature sensor (251), and a heat conducting rod (26); the operating table (21) is fixedly mounted on the bottom of the mounting frame (12); one side of the interior of the operating table (21) is hollow; the water outlet pipe (211) is fixedly mounted on one side of the bottom of the operating table (21); and the water inlet pipe (212) is fixedly mounted on the inner side of the operating table (21). On one side of the interior, the water pump (213) is fixedly mounted on the water inlet pipe (212), the first placement seat (22) is fixedly mounted on one end of the operating table (21), the second placement seat (23) is fixedly mounted on the other end of the operating table (21), the third placement seat (24) is fixedly mounted on one side of the operating table (21), the first temperature sensor (25) is fixedly mounted on one end of the interior of the operating table (21), the second temperature sensor (251) is fixedly mounted on the other end of the interior of the operating table (21), and a plurality of groups of heat conducting rods (26) are arrayed on the inner bottom surface of the operating table (21).

2. A heat recovery device for a multi-stage rotary kiln according to claim 1, characterized in that: The first driving assembly (13) comprises a first motor (131), a first mounting seat (132), a first rotating wheel (133), and a first fan (134); the first motor (131) is fixedly mounted on the second placement seat (23); two groups of the first mounting seats (132) are installed at one end of the mounting frame (12) at intervals; both ends of the first rotating wheel (133) are rotatably connected to the two groups of first mounting seats (132); the first fan (134) is detachably mounted on one side of the two groups of first mounting seats (132); the rotating shaft of the first fan (134) is connected to one end of the first rotating wheel (133); the rotating shaft of the first motor (131) is connected to the other end of the first rotating wheel (133); and the wheel surface of the first rotating wheel (133) is in contact with the multi-stage rotary kiln (1).

3. A heat recovery device for a multi-stage rotary kiln according to claim 2, characterized in that: The second driving assembly (14) comprises a second motor (141), a second mounting seat (142), a second rotating wheel (143), a first gear (144), a second gear (145), and a second fan (146); the second motor (141) is fixedly mounted on the first placement seat (22); two groups of the second mounting seats (142) are installed at intervals on the other end of the mounting frame (12); both ends of the second rotating wheel (143) are rotatably connected to the two groups of the second mounting seats (142); the first gear (144) is detachably mounted on one end of the second rotating wheel (143); and the second gear (145) is detachably mounted on the second mounting seat. One side of the mounting seat (142) corresponds to the first gear (144), the second gear (145) meshes with the first gear (144), a rotating seat is provided on the second mounting seat (142) corresponding to the position of the second gear (145), the second fan (146) is detachably mounted on the mounting frame (12) corresponding to the position of the second gear (145), the rotating shaft of the second fan (146) is connected to the second gear (145), the rotating shaft of the second motor (141) is connected to the other end of the second rotating wheel (143), and the wheel surface of the second rotating wheel (143) is in contact with the multi-stage rotary kiln (1).

4. A heat recovery device for a multi-stage rotary kiln according to claim 3, characterized in that: A third drive assembly (15) and a fourth drive assembly (16) are also correspondingly arranged on the other side of the mounting frame (12); the position of the third drive assembly (15) corresponds to the position of the first drive assembly (13) and has the same structure; the position of the fourth drive assembly (16) corresponds to the position of the second drive assembly (14) and has the same structure.

5. A heat recovery device for a multi-stage rotary kiln according to claim 4, characterized in that: The ventilation assembly (3) comprises a first air compressor (31), a first water bucket (32), a second water bucket (33), a first electric valve (331), a spray rack (34), a first water pipe (341), a second water pipe (342), and a second electric valve (343); the first air compressor (31), the first water bucket (32), and the second water bucket (33) are respectively placed on a third placement seat (24) at intervals; the first water bucket (32) has a built-in pump; two groups of the spray racks (34) are installed on a mounting frame at intervals. (12), the first water pipe (341) connects the first air compressor (31), the first water bucket (32), and the spray rack (34); one end of the second water pipe (342) is connected to the first water pipe (341), and the other end is connected to the second water bucket (33); the second electric valve (343) is fixedly installed inside the second water pipe (342); the bottom of the second water bucket (33) is connected to the water inlet pipe (212); and the first electric valve (331) is fixedly installed inside the water inlet pipe (212).

6. A heat recovery device for a multi-stage rotary kiln according to claim 5, characterized in that: The cooling component (4) comprises a second air compressor (41), a ventilation pipe (42), and an injection rack (43); the second air compressor (41) is fixedly mounted on a third placement seat (24) and is located on one side of the first air compressor (31); the injection rack (43) is detachably mounted on a mounting frame (12) and is located on one side of the spray rack (34); one end of the ventilation pipe (42) is connected to the second air compressor (41), and the other end is connected to the injection rack (43).

7. A heat recovery device for a multi-stage rotary kiln according to claim 6, characterized in that: A liquid level sensor (17) is also fixedly mounted on one side of the inner wall of the operating table (21).

8. The heat recovery device for a multi-stage rotary kiln according to claim 7, characterized in that: The multi-stage rotary kiln (1) is placed on an operating platform in a production workshop.

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