Tail gas linkage drying device for crystallizing copper sulfate

Abstract

The utility model provides a tail gas linkage drying device for crystallizing copper sulfate, which relates to the technical field of drying devices and comprises a barrel rotationally connected to a frame, a feeding hopper is fixedly arranged at the left end of the barrel, a discharging bin is arranged at the right end of the barrel, and a hot air inlet pipe is fixedly arranged at the left end of the barrel. A cold air inlet pipe is fixedly arranged at the right end of the barrel, a heating device is fixedly arranged on the hot air inlet pipe, a partition plate is fixedly arranged in the barrel, and the partition plate divides the inner space of the barrel into a left drying cavity and a right cooling cavity. According to the tail gas linkage drying device for crystallizing copper sulfate, hot air exhausted from the cylinder body firstly enters the heat exchange device and then is exhausted through the arranged heat exchange device, and new air needing to be heated firstly enters the heat exchange device to exchange heat with the hot air before entering the heating device; and the fresh air is preheated before entering the heating device, so that the purpose of reducing the energy consumption of the heating device is achieved.

Description

Technical Field

[0001] The utility model relates to a drying device, in particular to a tail gas linked drying device for crystallized copper sulfate, belonging to the technical field of drying devices. Background Art

[0002] The rotary drum dryer is a dryer that processes large quantities of materials. Due to its reliable operation, flexible operation, strong adaptability and large processing capacity, it is widely used in metallurgy, building materials, light industry and other departments. In the chemical industry, such as copper sulfate, sodium sulfide, calcium carbonate, calcium magnesium phosphate fertilizer, and ordinary superphosphate, rotary drum dryers are mostly used. The working principle is that after the wet material is put into the dryer from one end, it is evenly distributed and dispersed in the dryer under the flipping of the evenly distributed scraper in the inner drum, and fully contacts with the co-flowing hot air, which accelerates the drying heat transfer and mass transfer driving force. During the drying process, the material can be controlled to move to the other end of the dryer to discharge the finished product under the action of the inclined scraper and hot air flow.

[0003] There are two types of hot air used in the existing copper sulfate rotary drying device, hot air and flue gas. When hot air is used to dry copper sulfate crystals, the hot air flows in parallel or countercurrent with the copper sulfate crystals in the rotary drum to dry the copper sulfate crystals and then is discharged. Before the new air enters the rotary drum, it needs to be heated to form hot air. After the hot air dries the copper sulfate crystals, it is directly discharged into the atmosphere. Since it still has a high temperature, it does not meet the emission standards. At the same time, the heat of the discharged hot air escapes and causes losses. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model provides a tail gas linkage drying device for crystallized copper sulfate, so as to solve the problem of resource waste caused by failure to recycle the hot air discharged from the cylinder in the prior art.

[0006] (II) Technical solution

[0007] The utility model is realized by the following technical scheme: a tail gas linkage drying device for crystallized copper sulfate, comprising a cylinder rotatably connected to a frame, a charging hopper fixedly arranged at the left end of the cylinder, a discharge bin fixedly arranged at the right end of the cylinder, a hot air inlet pipe fixedly arranged at the left end of the cylinder, a cold air inlet pipe fixedly arranged at the right end of the cylinder, a heating device fixedly arranged on the hot air inlet pipe, a partition fixedly arranged in the cylinder, the partition divides the internal space of the cylinder into a drying chamber on the left and a cooling chamber on the right, and the partition is uniformly provided with circulation holes along the circumferential direction. The outer surface of the cylinder is evenly provided with air outlet holes corresponding to the flow grooves along the circumferential direction, the middle section of the outer surface of the cylinder is rotatably connected with an exhaust bin, the exhaust bin is fixedly arranged with the frame below, each air outlet hole is communicated with the internal space of the exhaust bin, an air suction port is provided on the upper end surface of the exhaust bin, a fan is fixedly arranged on the upper end surface of the exhaust bin, the input end of the fan is communicated with the air suction port, a heat exchange device is arranged between the exhaust pipe of the fan and the heating device, a bypass pipe is fixedly arranged in the middle section of the exhaust pipe, and an electric three-way valve is installed at the junction of the bypass pipe and the exhaust pipe.

[0008] Preferably, an air intake pipe is fixedly provided at the right end of the heat exchange device, and an electric air valve is installed on the air intake pipe.

[0009] Preferably, a control box is installed on the frame, and a contactor and a frequency converter are installed inside the control box, and a start and stop button are installed on the control box; when the start button is pressed, the coil km of the contactor is energized, the electric air valve opens, the normally open contact of the contactor is closed, the frequency converter is energized, and the fan starts working; when the stop button is pressed, the coil km of the contactor is de-energized, the electric air valve closes, the normally open contact of the contactor is disconnected, the frequency converter loses power, and the fan stops.

[0010] Preferably, the heat exchange device includes a shell, which is fixed to the frame by mounting plates fixedly arranged at both ends of the shell, and end covers are fixedly arranged at both ends of the shell, the end cover on the left side is fixedly arranged to the hot air inlet pipe, and the internal space of the end cover on the left side is connected to the hot air inlet pipe, the end cover on the right side is fixedly arranged to the air intake pipe, and the internal space of the end cover on the right side is connected to the air intake pipe, end plates are fixedly arranged on the left and right sides of the shell, a number of condensing tubes are penetrated between the two end plates, and both ends of each condensing tube are connected to the corresponding internal space of the end cover, the upper part of the outer surface of the shell is fixedly arranged to the exhaust pipe, and the space between the shell and the condensing tube is connected to the exhaust pipe, and the lower part of the outer surface of the shell is fixedly arranged to the exhaust pipe, and the exhaust pipe is connected to the space between the shell and the condensing tube.

[0011] Preferably, a support plate is fixedly provided on the left side of the upper end surface of the frame, and the right side of the upper end surface of the frame is fixedly provided with a discharge bin, the cylinder is rotatably connected to the support plate and the discharge bin, the feeding hopper is fixedly provided with the support plate, and the bottom end of the feeding hopper is connected with the internal space of the cylinder.

[0012] Preferably, a plurality of through holes are evenly opened along the circumference of the outer surface of the cylinder at the position corresponding to the discharge bin, the interior of the cylinder is connected with the internal space of the discharge bin through each through hole, and a discharge port connected with the internal space of the discharge bin is opened on the lower end surface of the discharge bin.

[0013] Preferably, a plurality of lifting plates are fixedly arranged on the inner side wall of the cylinder.

[0014] Preferably, a gear ring is coaxially fixedly provided on the outer surface of the cylinder, a motor is fixedly provided on the upper end surface of the frame, a gear is fixedly provided on the output shaft of the motor, and the gear is meshed with the gear ring.

[0015] The utility model provides a tail gas linkage drying device for crystallized copper sulfate, which has the following beneficial effects:

[0016] 1. The tail gas linkage drying device for crystallized copper sulfate can make the hot air exhausted from the cylinder first enter the heat exchange device and then be exhausted through the arranged heat exchange device, and the new air to be heated first enters the heat exchange device to exchange heat with the hot air before entering the heating device, so that the new air is preheated before entering the heating device, thereby achieving the purpose of reducing the energy consumption of the heating device.

[0017] 2. The tail gas linkage drying device for crystallized copper sulfate is installed with an electric air valve on the air inlet pipe, and a contactor and a frequency converter are installed in the control box. When the start button is pressed, the coil km of the contactor is energized, the electric air valve is opened, the normally open contact of the contactor is closed, the frequency converter is energized, and the fan starts to work; when the stop button is pressed, the coil km of the contactor is de-energized, the electric air valve is closed, the normally open contact of the contactor is disconnected, the frequency converter loses power, and the fan stops; the purpose of linking the opening of the electric air valve with the start and stop of the fan is achieved, so that when the fan stops, the electric air valve can be closed to prevent the flue gas from entering the heat exchange device and then entering the cylinder body, causing corrosion to the inside of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the shell of the utility model;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure inside the cylinder of the utility model;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the copy board of the utility model;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the partition of the utility model;

[0023] Figure 6 This is a three-dimensional structural schematic diagram of the discharge bin of the utility model;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure inside the shell of the utility model.

[0025] Description of Reference Numerals

[0026] 1. Cylinder; 2. Feeding hopper; 3. Discharge bin; 4. Hot air inlet pipe; 5. Cold air inlet pipe; 6. Heating device; 7. Partition; 8. Circulation slot; 9. Exhaust bin; 10. Suction port; 11. Fan; 12. Exhaust pipe; 13. Bypass pipe; 14. Electric three-way valve; 15. Inlet pipe; 16. Electric air valve; 17. Control box; 18. Shell; 19. Mounting plate; 20. Frame; 21. End cover; 22. End plate; 23. Condenser; 24. Exhaust pipe; 25. Support plate; 26. Through hole; 27. Discharge port; 28. Copying plate; 29. ​​Gear ring; 30. Motor; 31. Gear. DETAILED DESCRIPTION

[0027] The embodiment of the utility model provides a tail gas linked drying device for crystallized copper sulfate.

[0028] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , including a cylinder 1 rotatably connected to a frame 20, a charging hopper 2 is fixedly arranged at the left end of the cylinder 1, a discharge bin 3 is arranged at the right end of the cylinder 1, a hot air inlet pipe 4 is fixedly arranged at the left end of the cylinder 1, a cold air inlet pipe 5 is fixedly arranged at the right end of the cylinder 1, a heating device 6 is fixedly arranged on the hot air inlet pipe 4, a partition 7 is fixedly arranged inside the cylinder 1, the partition 7 divides the internal space of the cylinder 1 into a drying chamber on the left and a cooling chamber on the right, the partition 7 is evenly provided with flow grooves 8 along the circumferential direction, and the outer surface of the cylinder 1 is evenly provided with a plurality of The middle section of the outer surface of the cylinder 1 is rotatably connected to an exhaust bin 9, and the exhaust bin 9 is fixedly arranged with the frame 20 below. Each air outlet is communicated with the internal space of the exhaust bin 9. An air suction port 10 is provided on the upper end surface of the exhaust bin 9. A fan 11 is fixedly arranged on the upper end surface of the exhaust bin 9. The input end of the fan 11 is communicated with the air suction port 10. A heat exchange device is arranged between the exhaust pipe 12 of the fan 11 and the heating device 6. A bypass pipe 13 is fixedly arranged in the middle section of the exhaust pipe 12, and an electric three-way valve 14 is installed at the junction of the bypass pipe 13 and the exhaust pipe 12.

[0029] When in use, copper sulfate crystals are continuously added into the rotating cylinder 1 through the feeding hopper 2, and at the same time, the hot air inlet pipe 4 continuously inputs hot air into the cylinder 1, so that the hot air flows from the left end to the right end of the cylinder 1. The copper sulfate crystals are stirred inside the rotating cylinder 1 and are fully and effectively contacted with the hot air passing through the cylinder 1 to be dried. The copper sulfate crystals are stirred in the cylinder 1 and move toward the right end of the cylinder 1. When the copper sulfate crystals move to the partition 7, the copper sulfate crystals enter the circulation slot 8 of the partition 7 through the circulation slot 8 of the partition 7. To the cooling chamber on the right side of the cylinder 1, at this time, the cold air inlet pipe 5 at the right end of the cylinder 1 continuously inputs cold air into the cylinder 1, and the cold air contacts the dried copper sulfate crystals, so that the copper sulfate crystals are cooled, and the cooled copper sulfate crystals continue to move to the right end of the cylinder 1 and are discharged from the discharge bin 3; when the hot air and cold air in the cylinder 1 flow to the partition 7, they will enter the exhaust bin 9 through the circulation groove 8 and the air outlet of the cylinder 1, and be discharged into the exhaust pipe 12 through the running fan 11, and then be discharged from the bypass pipe 13.

[0030] When the device is used, there are two working states. The hot air is generally hot air and flue gas. In the first working state, when the hot air uses flue gas, the position of the electric three-way valve 14 is connected to the exhaust pipe 12 and the bypass pipe 13. The flue gas itself has a very high temperature and does not need heat exchange. At this time, the hot air and cold air in the cylinder 1 enter the exhaust bin 9 and are extracted by the fan 11 and discharged into the bypass pipe 13 through the exhaust pipe 12, and then discharged through the bypass pipe 13; in the second working state, when the hot air is used, the air needs to be heated to form hot air. Since the air needs to be heated, the hot air and cold air in the cylinder 1 can be heat-exchanged with the air in advance, so that the air is preheated to a set temperature before entering the heating device 6, and then the preheated air is heated by the heating device 6, which will reduce the energy consumption of the heating device 6. The heating device 6 can adopt electric heating. The working principle of the second working state is that the position of the electric three-way valve 14 is connected to the exhaust pipe 12 and The heat exchange device is connected, and the mixed gas of hot air and cold air coming out of the cylinder 1 has waste heat. Because the cold air cools the dried copper sulfate crystals, the temperature of the cold air will increase, and the hot air dries the copper sulfate crystals, the heat of the hot air will be lost, and its own temperature will decrease, but the hot air still has a high waste heat. The mixed gas of hot air and cold air has a high waste heat. The mixed gas of hot air and cold air flows directly into the heat exchange device from the exhaust pipe 12 of the fan 11 through the electric three-way valve 14 and then flows out, and the fresh air enters from the heat exchange device to exchange heat with the mixed gas and obtains the set heat, so that the temperature of the fresh air is increased, and the purpose of preheating the fresh air is achieved. The preheated fresh air comes out of the heat exchange device and enters the heating device 6 to be heated to the set temperature. Since the fresh air has been preheated, the energy consumption of the heating device 6 is reduced, and the fresh air becomes hot air when it is discharged from the heating device 6. The hot air enters the interior of the cylinder 1 from the left end of the cylinder 1 to dry the copper sulfate crystals.

[0031] See also Figure 3 and Figure 4 In order to improve the drying effect and moving speed of the copper sulfate crystals in the cylinder 1, in this embodiment, a plurality of shovel plates 28 are fixedly arranged on the inner wall of the cylinder 1; the shovel plates 28 are arranged from left to right along the spiral line in the cylinder 1 from sparse to dense. When in use, the copper sulfate crystals are continuously shoveled and sprinkled by the shovel plates 28 in the rotating cylinder 1, so that the heat contact surface of the copper sulfate crystals is increased, so as to improve the drying rate and promote the copper sulfate crystals to move to the right.

[0032] See also Figure 1 , Figure 2 and Figure 7 In order to prevent the flue gas return from corroding the interior of the equipment when the device stops when the flue gas is used to dry copper sulfate, in this embodiment, an air inlet pipe 15 is fixedly provided at the right end of the heat exchange device, and an electric air valve 16 is installed on the air inlet pipe 15; when the fan 11 is started, the electric air valve 16 automatically opens, allowing the flue gas to enter the heat exchange device through the air inlet pipe 15; when the fan 11 stops, the electric air valve 16 automatically closes to prevent the flue gas from entering the heat exchange device and then entering the cylinder 1, causing corrosion to the interior of the equipment.

[0033] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 In order to realize the purpose of automatically opening the electric air valve 16 when the fan 11 is started and automatically closing the electric air valve 16 when the fan 11 is stopped, in this embodiment, a control box 17 is installed on the frame 20, and a contactor and a frequency converter are installed inside the control box 17, and a start and stop button are installed on the control box 17; when the start button is pressed, the coil km of the contactor is energized, the electric air valve 16 is opened, the normally open contact of the contactor is closed, the frequency converter is energized, and the fan 11 starts to work; when the stop button is pressed, the coil km of the contactor is de-energized, the electric air valve 16 is closed, the normally open contact of the contactor is disconnected, the frequency converter loses power, and the fan 11 stops.

[0034] See also Figure 1 , Figure 2 and Figure 7In order to achieve the purpose of preheating the fresh air in the second working state, in this embodiment, the heat exchange device includes a shell 18, and the shell 18 is fixedly arranged with a frame 20 through a mounting plate 19 fixedly arranged at both ends of the shell 18. Both ends of the shell 18 are fixedly arranged with end covers 21. The left end cover 21 is fixedly arranged with the hot air inlet pipe 4, and the internal space of the left end cover 21 is connected to the hot air inlet pipe 4. The right end cover 21 is fixedly arranged with the air inlet pipe 15, and the internal space of the right end cover 21 is connected to the air inlet pipe 15. The shell 18 is connected, and end plates 22 are fixedly provided on the left and right sides inside the shell 18. A number of condensing tubes 23 are passed through the two end plates 22. Both ends of each condensing tube 23 are connected with the internal space of the corresponding end cover 21. The upper part of the outer surface of the shell 18 is fixedly provided with the exhaust pipe 12, and the space between the shell 18 and the condensing tube 23 is connected with the exhaust pipe 12. The lower part of the outer surface of the shell 18 is fixedly provided with an exhaust pipe 24, and the exhaust pipe 24 is connected with the space between the shell 18 and the condensing tube 23.

[0035] When in use, when the second working state is reached, the electric three-way valve 14 is in the position so that the exhaust pipe 12 is connected to the heat exchange device, and the fresh air enters the internal space of the right end cover 21 from the air inlet pipe 15 and enters from the right end of each condenser 23, and then the fresh air passes through the condenser 23 to enter the internal space of the left end cover 21, and then enters the hot air inlet pipe 4, and is heated by the heating device 6, and then enters the left end of the cylinder 1; at the same time, the fan 11 starts to draw the mixed gas of hot air and cold air inside the cylinder 1 from the exhaust bin 9 and discharge it into the space between the shell 18 and the condenser 23 through the exhaust pipe 24 and the electric three-way valve 14, at this time, the fresh air flowing inside the condenser 23 and the mixed gas outside the condenser 23 undergo heat exchange, the fresh air is preheated, and the mixed gas is discharged from the exhaust pipe 24.

[0036] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 In order to achieve the purpose of rotational connection between the cylinder 1 and the frame 20, in this embodiment, a support plate 25 is fixedly provided on the left side of the upper end surface of the frame 20, and the right side of the upper end surface of the frame 20 is fixedly provided with the discharge bin 3, the cylinder 1 is rotationally connected with the support plate 25 and the discharge bin 3, the feeding hopper 2 is fixedly provided with the support plate 25, and the bottom end of the feeding hopper 2 is connected with the internal space of the cylinder 1; when the cylinder 1 rotates, it rotates inside the support plate 25 and the discharge bin 3.

[0037] See also Figure 4 , Figure 5 and Figure 6In order to achieve the purpose of discharging copper sulfate crystals, in this embodiment, a plurality of through holes 26 are evenly opened along the circumference of the outer surface of the cylinder 1 at the position corresponding to the discharging bin 3, the interior of the cylinder 1 is connected with the internal space of the discharging bin 3 through each through hole 26, and the lower end surface of the discharging bin 3 is provided with a discharging port 27 connected with the internal space of the discharging bin 3; when the copper sulfate crystals move to the through hole 26 in the cylinder 1, they fall into the discharging bin 3 through the through hole 26 and are discharged from the discharging port 27 of the discharging bin 3, thereby achieving the purpose of discharging the copper sulfate crystals after cooling.

[0038] See also Figure 1 , Figure 2 and Figure 3 In order to achieve the purpose of driving the cylinder body 1 to rotate, in this embodiment, a gear ring 29 is coaxially fixedly provided on the outer surface of the cylinder body 1, a motor 30 is fixedly provided on the upper end surface of the frame body 20, and a gear 31 is fixedly provided on the output shaft of the motor 30, and the gear 31 is meshed with the gear ring 29; when in use, the motor 30 rotates to drive the cylinder body 1 to rotate through the gear 31 and the gear ring 29.

[0039] When the utility model is in use, the copper sulfate crystals to be dried are added into the cylinder 1 through the feeding hopper 2, the motor 30 rotates through the gear 31 and the gear ring 29 to electrically drive the cylinder 1 to rotate, so that the copper sulfate crystals inside the cylinder 1 are continuously picked up and sprinkled by the shoveling plate 28 and move to the right, and at the same time, the start button is pressed, the fan 11 is started, the electric air valve 16 is opened, and the hot air enters the cylinder 1 from the air inlet pipe 15, the end cover 21 on the right side, the condensation pipe 23, the end cover 21 on the left side, the hot air inlet pipe 4, and the heating device 6 in sequence. The copper sulfate crystals are dried inside the cylinder 1 and flow from left to right inside the cylinder 1. When the copper sulfate crystals move to the partition 7, they pass through the flow groove 8 of the partition 7 and enter the cooling chamber on the right side of the partition 7. At this time, the cold air enters the cooling chamber from the cold air inlet pipe 5 to cool the copper sulfate crystals. When the cooled copper sulfate crystals move to the discharge bin 3, they enter the discharge bin 3 from the through hole 26 and are discharged from the discharge port 27, thereby achieving the purpose of drying and cooling the copper sulfate crystals.

[0040] When the copper sulfate crystals are dried, in the first working state, the hot air uses flue gas, the heating device 6 is in the closed state, and the heating device 6 only provides a flue gas channel. The flue gas enters from the air inlet pipe 15, passes through the condenser 23, enters the heating device 6, and enters the interior of the cylinder 1 from the heating device 6. The electric three-way valve 14 is in the position that the exhaust pipe 12 and the bypass pipe 13 are connected. The hot air and cold air in the cylinder 1 enter the exhaust bin 9 and are drawn out by the fan 11 and discharged into the bypass pipe 13 through the exhaust pipe 12, and then discharged through the bypass pipe 13; in the second working state, the hot air uses hot air, the heating device 6 is in the open state, and the electric three-way valve 14 is in the position. The exhaust pipe 12 is connected to the heat exchange device, and the mixed gas of hot air and cold air flows directly into the space between the shell 18 and the condenser 23 from the exhaust pipe 12 of the fan 11 through the electric three-way valve 14 and flows out, while the fresh air flows through the condenser 23 to exchange heat with the mixed air and obtain the set heat, so that the temperature of the fresh air is increased, thereby achieving the purpose of preheating the fresh air. The preheated fresh air comes out of the heat exchange device and enters the heating device 6 to be heated to the set temperature. Since the fresh air has been preheated, the energy consumption of the heating device 6 is reduced, and the fresh air becomes hot air when discharged from the heating device 6. The hot air enters the interior of the cylinder 1 from the left end of the cylinder 1 to dry the copper sulfate crystals.

[0041] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A tail gas linked drying device for crystallized copper sulfate, comprising a cylinder (1) rotatably connected to a frame (20), characterized in that: A feeding hopper (2) is fixedly arranged at the left end of the cylinder (1), a discharge bin (3) is fixedly arranged at the right end of the cylinder (1), a hot air inlet pipe (4) is fixedly arranged at the left end of the cylinder (1), a cold air inlet pipe (5) is fixedly arranged at the right end of the cylinder (1), a heating device (6) is fixedly arranged on the hot air inlet pipe (4), a partition (7) is fixedly arranged inside the cylinder (1), the partition (7) divides the internal space of the cylinder (1) into a drying chamber on the left and a cooling chamber on the right, the partition (7) is evenly provided with flow grooves (8) along the circumferential direction, and the outer surface of the cylinder (1) is evenly provided with air outlet holes corresponding to the flow grooves (8) along the circumferential direction; The middle section of the outer surface of the cylinder (1) is rotatably connected to an exhaust bin (9), the exhaust bin (9) is fixedly arranged with the frame (20) below, each of the air outlets is connected to the internal space of the exhaust bin (9), the upper end surface of the exhaust bin (9) is provided with an air suction port (10), the upper end surface of the exhaust bin (9) is fixedly provided with a fan (11), the input end of the fan (11) is connected to the air suction port (10), a heat exchange device is arranged between the exhaust pipe (12) of the fan (11) and the heating device (6), a bypass pipe (13) is fixedly arranged in the middle section of the exhaust pipe (12), and an electric three-way valve (14) is installed at the junction of the bypass pipe (13) and the exhaust pipe (12).

2. The tail gas linkage drying device for crystallization of copper sulfate according to claim 1, characterized in that: An air intake pipe (15) is fixedly arranged at the right end of the heat exchange device, and an electric air valve (16) is installed on the air intake pipe (15).

3. The tail gas linkage drying device for crystallization of copper sulfate according to claim 2, characterized in that: A control box (17) is installed on the frame (20), a contactor and a frequency converter are installed inside the control box (17), and a start and stop button are installed on the control box (17); when the start button is pressed, the coil km of the contactor is energized, the electric air valve (16) is opened, the normally open contact of the contactor is closed, the frequency converter is energized, and the fan (11) starts to work; when the stop button is pressed, the coil km of the contactor is de-energized, the electric air valve (16) is closed, the normally open contact of the contactor is disconnected, the frequency converter is powered off, and the fan (11) stops.

4. The tail gas linkage drying device for crystallization of copper sulfate according to claim 3, characterized in that: The heat exchange device comprises a shell (18), the shell (18) being fixedly arranged with a frame (20) via mounting plates (19) fixedly arranged at both ends of the shell (18), and end covers (21) being fixedly arranged at both ends of the shell (18), the left end cover (21) being fixedly arranged with a hot air inlet pipe (4), and the internal space of the left end cover (21) being communicated with the hot air inlet pipe (4), the right end cover (21) being fixedly arranged with an air inlet pipe (15), and the internal space of the right end cover (21) being communicated with the air inlet pipe (15), and the left and right sides of the shell (18) being fixedly arranged with a hot air inlet pipe (4) and a hot air inlet pipe (15). An end plate (22) is fixedly provided, and a plurality of condensing tubes (23) are provided between the two end plates (22), and both ends of each condensing tube (23) are connected to the internal space of the corresponding end cover (21). The upper part of the outer surface of the shell (18) is fixedly provided with the discharge tube (12), and the space between the shell (18) and the condensing tube (23) is connected to the discharge tube (12). The lower part of the outer surface of the shell (18) is fixedly provided with an exhaust pipe (24), and the space between the exhaust pipe (24) and the shell (18) and the condensing tube (23) is connected to the exhaust pipe (24).

5. The tail gas linked drying device for crystallization of copper sulfate according to claim 4, characterized in that: A support plate (25) is fixedly arranged on the left side of the upper end surface of the frame (20), and a discharge bin (3) is fixedly arranged on the right side of the upper end surface of the frame (20). The cylinder (1) is rotatably connected to the support plate (25) and the discharge bin (3). The feeding hopper (2) is fixedly arranged on the support plate (25), and the bottom end of the feeding hopper (2) is connected to the internal space of the cylinder (1).

6. The tail gas linked drying device for crystallization of copper sulfate according to claim 5, characterized in that: A plurality of through holes (26) are evenly arranged along the circumference of the outer surface of the cylinder (1) at a position corresponding to the discharge bin (3); the interior of the cylinder (1) is connected to the internal space of the discharge bin (3) through each through hole (26); and a discharge port (27) is arranged on the lower end surface of the discharge bin (3) and is connected to the internal space of the discharge bin (3).

7. The tail gas linked drying device for crystallization of copper sulfate according to claim 1, characterized in that: A plurality of lifting plates (28) are fixedly arranged on the inner side wall of the cylinder (1).

8. The tail gas linked drying device for crystallization of copper sulfate according to claim 1, characterized in that: A gear ring (29) is coaxially fixedly disposed on the outer surface of the cylinder (1), a motor (30) is fixedly disposed on the upper end surface of the frame (20), a gear (31) is fixedly disposed on the output shaft of the motor (30), and the gear (31) is meshed with the gear ring (29).

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