A sludge low-temperature drying device and a method for using the same

Abstract

The application discloses a sludge low-temperature drying device and a use method thereof, and belongs to the technical field of sludge drying, and comprises a sludge drying box, a feed box is detachably installed at one end of the top of the sludge drying box, three groups of mounting seats are arrayed and installed on one side of the sludge drying box, and the mounting seats are respectively a first mounting seat, a second mounting seat and a third mounting seat; a first motor is detachably installed on the first mounting seat; through the cooperation of two groups of sludge stirring rods and two groups of sludge pressing rollers, the water content of the batch of sludge can be judged according to the different sludge stirring rotating speeds, the flattening speed and the discharging time are changed according to the different sludge water contents, when the sludge water content is high, the sludge is slowly stirred, splashing of the sludge and water to the production workshop is avoided, the workshop environment is not affected, the sludge is slowly flattened and the operation time is prolonged, the discharging amount of the sludge is increased, the yield is increased, and the sludge is prevented from flowing everywhere due to continuous discharging.

Description

Technical Field

[0001] This invention belongs to the field of sludge drying technology, specifically relating to a low-temperature sludge drying device and its usage method. Background Technology

[0002] The sludge discharged from urban wastewater treatment plants, after gravity thickening and mechanical dewatering, has a moisture content of around 80%, is bulky, and has a low calorific value. It is unsuitable for aerobic composting, incineration, building material utilization, or even landfilling. It must be further dewatered and dried. Sludge drying, also known as sludge dewatering, refers to the process of removing most of the water content from sludge through processes such as filtration or evaporation. It generally refers to the use of self-evaporation facilities such as sludge drying beds. After sludge thickening, physical methods are used to further reduce the moisture content of the sludge, making it easier for the sludge to be transported, stored, utilized, or further treated. There are two types of dewatering (drying): natural evaporation and mechanical dewatering. Both are measures to further reduce the moisture content of sludge. After sludge thickening, physical methods are used to further reduce the moisture content of the sludge, making it easier for the sludge to be transported, stored, utilized, or further treated.

[0003] The existing patent publication number is CN 110228928 A discloses a membrane-covered sludge drying device, including a base plate, a permeation pipe, and walls. The walls are arranged on the upper side of the base plate, the permeation pipe is arranged inside the base plate, a gravel layer is arranged between the walls, a coarse sand layer is arranged on the upper side of the gravel layer, a slope is arranged on the inner side of the walls, a lifting column is arranged on the upper side of the walls, a bracket is arranged on the upper side of the lifting column, a bottom membrane is arranged on the upper side of the bracket, a temperature and humidity sensor is arranged on the bracket, an alarm light is arranged below the temperature and humidity sensor, a ventilation pipe is arranged in the middle of the bracket, a motor is arranged inside the ventilation pipe, a fan blade is arranged on the motor, a top membrane is arranged on the upper side of the fan blade, an operation box is arranged at one end of the bracket, a PLC integrated machine is arranged inside the operation box, a 4G transmitter is arranged on one side of the PLC integrated machine, a speaker is arranged on the outside of the operation box, and an adjustment knob is arranged on the PLC integrated machine. It only automatically measures the dryness and moisture of the sludge and the accumulated heat, and the drying efficiency is low, which requires some improvements.

[0004] Therefore, it is necessary to design a practical low-temperature sludge drying device. Summary of the Invention

[0005] The purpose of this invention is to provide a low-temperature sludge drying device and its usage method, in order to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a sludge low-temperature drying device and its usage method, comprising a sludge drying box, four sets of shock-absorbing bases fixedly installed around the bottom of the sludge drying box, a feed box detachably installed at one end of the top of the sludge drying box, three sets of mounting seats arranged in an array on one side of the sludge drying box, namely a first mounting seat, a second mounting seat, and a third mounting seat, a first motor detachably installed on the first mounting seat, a second motor detachably installed on the second mounting seat, and a third motor detachably installed on the third mounting seat, a mounting plate fixedly installed on one side of the sludge drying box, located on one side of the second mounting seat, a fourth motor detachably installed on the mounting plate, a heat dissipation plate detachably installed on the other side of the sludge drying box, a plurality of mounting holes provided on the box body of the sludge drying box, and a drying chamber provided inside the sludge drying box;

[0007] The sludge drying box is also equipped with a stirring component and a drying component.

[0008] The mixing assembly includes a fourth mounting base, a speed detector, sludge mixing rods, sludge pressing rollers, a heating fan, a first ventilation pipe, and a first electric valve. Two sets of the fourth mounting bases are installed at intervals on one side of the inside of the feed box. One end of each set of sludge mixing rods is connected to the two sets of fourth mounting bases, and the other end passes through the mounting hole on the sludge drying box and is connected to the rotating shaft of the second motor. Two sets of speed detectors are set on the two sets of fourth mounting bases.

[0009] The present invention further illustrates that the two sets of sludge pressing rollers are arranged inside the feed box on one side, located on one side of the two sets of sludge stirring rods. One end of the two sets of sludge pressing rollers passes through the mounting hole on the sludge drying box and is connected to the rotating shaft of the fourth motor. The heating fan is detachably installed inside one end of the sludge drying box. One end of the first ventilation pipe is connected to the heating fan, and the other end extends into the drying chamber. The first electric valve is fixedly installed inside the first ventilation pipe.

[0010] The present invention further describes that the drying assembly includes a first conveyor belt, a second conveyor belt, a discharge pipe, a refrigeration box, a second ventilation pipe, a second electric valve, a third ventilation pipe, a third electric valve, a fan, a heat-conducting rod, a sludge shovel, and a cooler. The first and second conveyor belts are longitudinally spaced apart on one side of the interior of the sludge drying box. The discharge pipe is fixedly installed at the bottom of the interior of the sludge drying box, corresponding to the position of the second conveyor belt. The refrigeration box is located on the other side of the interior of the sludge drying box. One end of the second ventilation pipe is connected to the refrigeration box, and the other end extends into the drying chamber. The second ventilation pipe is located on one side of the first conveyor belt. The second electric valve is fixedly installed in the second ventilation pipe. One end of the third ventilation pipe is connected to the refrigeration box, and the other end extends into the drying chamber. The third ventilation pipe is located on one side of the second conveyor belt, and the third electric valve is fixedly installed in the third ventilation pipe.

[0011] The present invention further illustrates that the blower is located on the other side of the sludge drying box, on one side of the refrigeration box, and the refrigeration unit is detachably installed in the refrigeration box.

[0012] The present invention further illustrates that the two sets of heat-conducting rods are fixedly installed on the inner box of the sludge drying box, located on one side of the first conveyor belt, and the sludge shovel is detachably installed on the bottom frame of the first conveyor belt. One end of the two sets of heat-conducting rods extends into the drying chamber, and the other end is connected to the sludge shovel.

[0013] The present invention further illustrates that the sludge drying box is placed on the floor of the production workshop.

[0014] The present invention further illustrates that the interior of the sludge drying box is hollow.

[0015] Includes the following steps:

[0016] S1. When the equipment program sets the speed of the second motor to V1, the second motor drives the two sets of sludge stirring rods to rotate slowly, stirring and crushing the input sludge. At this time, the equipment program detects whether the speed of the two speed sensors is V1. If it is ≤V1, the equipment program determines that the batch of sludge has a high water content and good fluidity. The equipment program controls the speed of the fourth motor to be adjusted to X1, and the running time is Y3. The fourth motor drives the two sets of sludge pressing rollers to rotate slowly, pressing the sludge flat and letting it fall downwards onto the first conveyor belt for conveying. At this time, the equipment program starts timing. When the running time of the fourth motor reaches Y3, the equipment program controls the fourth motor to stop. The stopping time is Y0. At this time, the two sets of sludge stirring rods continue to rotate slowly to avoid the sludge from accumulating in the feed box due to a long period of stopping, resulting in mud-water separation, avoiding damage to the equipment, and reducing the maintenance cost of the factory. When the stopping time is up, the equipment program controls the above operation to be repeated.

[0017] S2. If V1 ≤ the rotation speed of the two sets of speed sensors ≤ V2, the equipment program determines that the sludge in this batch has normal moisture content and good fluidity. The equipment program controls the rotation speed of the second motor to V2, increases the stirring speed of the two sets of sludge stirring rods, and speeds up the crushing of the sludge. The rotation speed of the fourth motor is adjusted to X2, and the running time is Y2, which increases the stirring speed of the two sets of sludge pressing rollers. After the sludge is pressed flat, it falls downward onto the first conveyor belt for conveying. At this time, the equipment program starts timing. When the running time of the fourth motor reaches Y2, the equipment program controls the fourth motor to stop. The stopping time is Y0. At this time, the two sets of sludge stirring rods continue to rotate to prevent the sludge from accumulating in the feed box and drying and clumping due to a long period of stopping, thus avoiding damage to the equipment and reducing the maintenance cost of the factory. When the stopping time is up, the equipment program controls the above operation to be repeated.

[0018] S3. If V2 ≤ the rotation speed of the two sets of speed sensors ≤ V3, the equipment program determines that the sludge in this batch has low water content and poor fluidity. The equipment program controls the rotation speed of the second motor to V3, increases the stirring speed of the two sets of sludge stirring rods, and speeds up the crushing speed of the sludge. The rotation speed of the fourth motor is adjusted to X3, and the running time is Y1. The fourth motor drives the two sets of sludge pressing rollers to rotate quickly, pressing the sludge flat and then letting it fall downwards onto the first conveyor belt for conveying. At this time, the equipment program starts timing. When the running time of the fourth motor reaches Y1, the equipment program controls the fourth motor to stop. The stopping time is Y0. At this time, the two sets of sludge stirring rods continue to rotate to prevent the sludge from accumulating in the feed box and drying and clumping due to a long period of stopping, thus avoiding damage to the equipment and reducing the maintenance cost of the factory. When the stopping time is up, the equipment program controls the above operation to repeat.

[0019] Includes the following steps:

[0020] S1. When the equipment program detects that the speed of the second motor is V1, the equipment program determines that the sludge has a high water content. The equipment program controls the speed of the third motor to be adjusted to M1. The third motor drives the first conveyor belt to rotate slowly, so that the flattened sludge is conveyed backward. At the same time, the equipment program controls the first electric valve to open. The heating fan diverts hot air to the first ventilation pipe and sprays it downward to perform secondary drying on the sludge conveyed on the first conveyor belt, improves the drying efficiency, and ensures that the sludge can be completely dried. During the drying process, the heat conduction rod conducts heat to the sludge shovel to heat it, so that it can quickly shovel off the sludge blocks and turn them over to improve the sludge drying efficiency. Then the equipment program controls the refrigeration unit to start. The fan blows air into the refrigeration box, and the cold air blows out from the second ventilation pipe and the third ventilation pipe to perform low-temperature drying operation on the sludge conveyed on the first conveyor belt.

[0021] S2. When the equipment program detects that the speed of the second motor is V2, the equipment program determines that the sludge moisture content is normal. The equipment program controls the speed of the third motor to be adjusted to M2. The third motor drives the first conveyor belt to rotate, so that the flattened sludge is conveyed backward. At the same time, the equipment program controls the first electric valve to close, and the heating fan sprays hot air downward to dry the sludge conveyed on the first conveyor belt, improves the drying efficiency, and ensures that the sludge can be completely dried. Then the equipment program controls the refrigeration unit to start. After the fan blows air into the refrigeration box, the cold air blows out from the second ventilation pipe and the third ventilation pipe to perform low-temperature drying operation on the sludge conveyed on the first conveyor belt.

[0022] S3. When the equipment program detects that the speed of the second motor is V3, the equipment program determines that the sludge has low moisture content. The equipment program controls the speed of the third motor to be adjusted to M3. The third motor drives the first conveyor belt to rotate quickly, so that the flattened sludge is conveyed backward. At the same time, the equipment program controls the first electric valve to open, and the heating fan diverts hot air to the first ventilation pipe and sprays it downward to perform secondary drying on the sludge conveyed on the first conveyor belt, improves the drying efficiency, and ensures that the sludge can be completely dried. During the drying process, the heat conduction rod conducts heat to the sludge shovel to heat it, so that it can quickly shovel off the sludge blocks and turn them over, improving the sludge drying efficiency. Then the equipment program controls the refrigeration unit to start. The fan blows air into the refrigeration box, and the cold air blows out from the second and third ventilation pipes to perform low-temperature drying operation on the sludge conveyed on the first conveyor belt.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention, through the coordinated use of two sets of sludge stirring rods, two sets of sludge pressing rollers, two sets of speed sensors and equipment programs, can determine the moisture content of a batch of sludge based on the different sludge stirring speeds, and adjust the pressing speed and feeding time according to the different sludge moisture content. When the sludge moisture content is high, it is stirred slowly to avoid mud and water splashing everywhere in the production workshop and affecting the workshop environment. At the same time, the sludge is pressed slowly and the running time is increased to increase the amount of sludge fed. While increasing the output, it can avoid the sludge flowing everywhere due to continuous feeding. When the sludge moisture content is low, it is stirred quickly to prevent the sludge from accumulating in the feeding box and drying and clumping due to long periods of inactivity. At the same time, the sludge is pressed quickly and the running time is reduced to reduce the amount of sludge fed, ensuring that the sludge can be completely dried and reducing the rework cost of the factory.

[0024] By using the third motor, the first electric valve, the refrigeration unit, and the equipment program in coordination, the feeding speed can be adjusted according to the different moisture contents of the sludge. When the sludge has a high moisture content, the feeding speed is reduced to prevent the mud and water from flowing everywhere due to excessive speed. When the sludge has a low moisture content, the feeding speed is increased to improve production efficiency. When the sludge has a high moisture content, the hot air is diverted and then used for secondary drying to improve the sludge drying efficiency. At the same time, the heat is used again to heat the sludge shovel blades, enabling them to quickly shovel off the sludge and turn it over to prevent the sludge from drying on the surface while remaining moist inside. Low-temperature drying is also performed to make the sludge dry more thoroughly and reduce the factory's rework costs. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is the invention Figure 1 Enlarged schematic diagram of the structure in region A;

[0028] Figure 3 This is the invention Figure 1 Schematic diagram of the internal structure of region B;

[0029] Figure 4 This is a schematic diagram of the internal structure of the sludge drying box of the present invention;

[0030] Figure 5 This is a schematic diagram of the internal structure of the sludge drying box from another perspective of the present invention;

[0031] Figure 6 This is a schematic diagram of the internal structure of the pipeline of the present invention;

[0032] Figure 7 This is the invention Figure 5 Enlarged schematic diagram of the structure in region C.

[0033] In the diagram: 1. Sludge drying box; 11. Feed box; 12. First mounting base; 121. First motor; 13. Second mounting base; 131. Second motor; 14. Third mounting base; 141. Third motor; 15. Mounting plate; 151. Fourth motor; 16. Heat dissipation plate; 17. Drying chamber;

[0034] 2. Agitator assembly; 21. Fourth mounting base; 22. Speed ​​detector; 23. Sludge agitator; 24. Sludge pressing roller; 25. Heating fan; 251. First ventilation pipe; 252. First electric valve;

[0035] 3. Drying components; 31. First conveyor belt; 32. Second conveyor belt; 33. Discharge pipe; 34. Refrigeration box; 341. Second ventilation pipe; 3411. Second electric valve; 342. Third ventilation pipe; 3421. Third electric valve; 343. Fan; 35. Heat transfer rod; 351. Sludge shovel; 36. Refrigerator. Detailed Implementation

[0036] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] Please see Figure 1-7 This invention provides a technical solution: a sludge low-temperature drying device and its usage method, comprising a sludge drying box 1, which is placed on the floor of a production workshop. The interior of the sludge drying box 1 is hollow. Four sets of shock-absorbing bases are fixedly installed around the bottom of the sludge drying box 1. A feed box 11 is detachably installed at one end of the top of the sludge drying box 1 for conveying sludge. Three sets of mounting seats are arrayed on one side of the sludge drying box 1, namely a first mounting seat 12, a second mounting seat 13, and a third mounting seat 14. A first motor 121 is detachably installed on the first mounting seat 12. A second motor 131 is detachably mounted on the second mounting base 13, and a third motor 141 is detachably mounted on the third mounting base 14. A mounting plate 15 is also fixedly mounted on one side of the sludge drying box 1, located on one side of the second mounting base 13. A fourth motor 151 is detachably mounted on the mounting plate 15. The four motors are used to provide power for driving. A heat dissipation plate 16 is detachably mounted on the other side of the sludge drying box 1. Several sets of mounting holes (not shown in the figure) are provided on the body of the sludge drying box 1 for connection. A drying chamber 17 is also provided inside the sludge drying box 1.

[0038] The sludge drying box 1 is also equipped with a stirring assembly 2 and a drying assembly 3.

[0039] The mixing assembly 2 includes a fourth mounting base 21, a speed detector 22, sludge mixing rods 23, sludge pressing rollers 24, a heating fan 25, a first ventilation pipe 251, and a first electric valve 252. Two sets of fourth mounting bases 21 are installed at intervals on one side of the inside of the feed box 11. One end of each set of sludge mixing rods 23 is connected to the two sets of fourth mounting bases 21, and the other end passes through the mounting hole on the sludge drying box 1 and is connected to the rotating shaft of the second motor 131. Two sets of speed detectors 22 are set on the two sets of fourth mounting bases 21 to detect the speed of sludge mixing. Two sets of sludge pressing rollers 24 are set on one side of the inside of the feed box 11, located on one side of the two sets of sludge mixing rods 23. One end of each set of sludge pressing rollers 24 passes through the mounting hole on the sludge drying box 1 and is connected to the rotating shaft of the fourth motor 151.

[0040] The heating fan 25 is detachably installed inside one end of the sludge drying box 1. One end of the first ventilation pipe 251 is connected to the heating fan 25, and the other end extends into the drying chamber 17 to deliver hot air to the sludge for drying. The first electric valve 252 is fixedly installed inside the first ventilation pipe 251 to control the gas flow.

[0041] The drying assembly 3 includes a first conveyor belt 31, a second conveyor belt 32, a discharge pipe 33, a refrigeration box 34, a second ventilation pipe 341, a second electric valve 3411, a third ventilation pipe 342, a third electric valve 3421, a fan 343, a heat-conducting rod 35, a sludge shovel 351, and a cooler 36. The first conveyor belt 31 and the second conveyor belt 32 are longitudinally spaced on one side inside the sludge drying box 1. The two sets of conveyor belts are used to transport sludge for drying. The discharge pipe 33 is fixedly installed at the bottom inside the sludge drying box 1, corresponding to the position of the second conveyor belt 32, and is used to output the dried sludge. The refrigeration box 34 is located on the other side inside the sludge drying box 1 and is used to assist in low-temperature drying. In the drying operation, one end of the second ventilation pipe 341 is connected to the refrigeration box 34, and the other end extends into the drying chamber 17. The second ventilation pipe 341 is located on one side of the first conveyor belt 31 and is used to perform low-temperature drying operation on the sludge conveyed on the first conveyor belt 31. The second electric valve 3411 is fixedly installed in the second ventilation pipe 341 to cooperate in controlling the gas flow. One end of the third ventilation pipe 342 is connected to the refrigeration box 34, and the other end extends into the drying chamber 17. The third ventilation pipe 342 is located on one side of the second conveyor belt 32 and is used to perform low-temperature drying operation on the sludge conveyed on the second conveyor belt 32. The third electric valve 3421 is fixedly installed in the third ventilation pipe 342 to cooperate in controlling the gas flow.

[0042] The blower 343 is located on the other side of the sludge drying box 1, on one side of the refrigeration box 34. The refrigerator 36 is detachably installed in the refrigeration box 34 for low-temperature drying of sludge.

[0043] Two sets of heat-conducting rods 35 are fixedly installed on the inner box of the sludge drying box 1, located on one side of the first conveyor belt 31, for recovering the heat of the hot air blown out by the heating fan 25. The sludge shovel 351 is detachably installed on the bottom frame of the first conveyor belt 31 for shoveling the sludge conveyed on the first conveyor belt 31. One end of the two sets of heat-conducting rods 35 extends into the drying chamber 17, and the other end is connected to the sludge shovel 351.

[0044] The sludge drying box 1 is powered by an external workshop power supply to drive its internal components.

[0045] The sludge drying box 1 is also equipped with an equipment program, which can control the start and stop of four sets of motors, the opening and closing of three sets of electric valves, the start and stop of heating fan 25, the start and stop of fan 343, and the start and stop of cooler 36.

[0046] The four sets of motors, three sets of electric valves, heating fan 25, fan 343, and cooler 36 are all connected to the equipment program signal.

[0047] Sludge conveying operation:

[0048] When workers need to perform low-temperature drying of sludge, they first use tools to move the sludge conveying pipe to the feed box 11, then turn on the workshop power. At this time, the sludge drying box 1 starts, the equipment program starts, and the equipment program controls the start of four sets of motors. The second motor 131 drives the two sets of sludge stirring rods 23 to rotate, the fourth motor 151 drives the two sets of sludge pressing rollers 24 to rotate, the third motor 141 starts rotating forward and drives the first conveyor belt 31 to rotate, and the first motor 121 starts rotating in reverse and drives the second conveyor belt 32 to rotate. After the sludge is fed into the feed box 11, it moves downward to the two sets of sludge stirring rods 23 for stirring and conveying. The clumps of sludge are fully broken up and then conveyed downward to the two sets of sludge pressing rollers 24 for flattening. After being flattened, the sludge falls downward onto the first conveyor belt 31. Then the equipment program controls the fan 343 and the heating... When the blower 25 is turned on, the second electric valve 3411 and the third electric valve 3421 are opened, and the first electric valve 252 is closed. The blower 343 blows air into the refrigeration box 34 and then blows it out from the second ventilation pipe 341 and the third ventilation pipe 342. At this time, the refrigeration unit 36 ​​is closed, and the conveyed sludge is dried at room temperature. The heating blower 25 blows hot air downwards onto the sludge conveyed by the first conveyor belt 31 to dry the sludge. After drying, the sludge is conveyed to the top of the second conveyor belt 32. At this time, the sludge shovel 351 shovels the sludge off the first conveyor belt 31 and makes it fall onto the second conveyor belt 32 for subsequent secondary drying and conveying. At the same time, it can turn the sludge over to improve the drying efficiency. The dried sludge will fall from the discharge pipe 33 into the subsequent collection device for easy collection by the staff.

[0049] During the above operations, the equipment program detects the rotational speeds of the two sets of sludge agitator bars 23 using two sets of speed detectors 22 and compares them with the set values. The equipment program sets the rotational speed of the second motor 131 to V1, V2, and V3, where V1 is the minimum and V3 is the maximum, and can be adjusted according to specific needs. The rotational speed of the fourth motor 151 is set to X1, X2, and X3, where X1 is the minimum and X2 is the maximum, and can be adjusted according to specific needs. The running time of the fourth motor 151 is set to Y1, Y2, and Y3, and the stopping time is set to Y0, where Y1 is the minimum and Y3 is the maximum, and can be adjusted according to specific needs. When the equipment program sets the rotational speed of the second motor 131 to V1, the second motor 131 drives the two sets of sludge agitator bars 23 to rotate slowly, performing agitation and crushing operations on the input sludge. At this time, the equipment... The program detects whether the rotation speed of the two sets of speed sensors 22 is V1. If it is ≤V1, the program determines that the sludge in this batch has a high water content and good fluidity. The program controls the speed of the fourth motor 151 to be adjusted to X1 and the running time is Y3. The fourth motor 151 drives the two sets of sludge pressing rollers 24 to rotate slowly, pressing the sludge flat and then letting it fall downwards onto the first conveyor belt 31 for conveying. At this time, the program starts timing. When the running time of the fourth motor 151 reaches Y3, the program controls the fourth motor 151 to stop. The stopping time is Y0. At this time, the two sets of sludge stirring rods 23 continue to rotate slowly to avoid the sludge from accumulating in the feed box 11 due to a long period of stopping, which would cause mud-water separation, avoid damage to the device, and reduce the maintenance cost of the factory. When the stopping time is up, the program controls the above operation to be repeated.

[0050] If V1 ≤ the rotation speed of the two sets of speed sensors 22 ≤ V2, the equipment program determines that the sludge in this batch has normal moisture content and good fluidity. The equipment program controls the rotation speed of the second motor 131 to V2, increases the stirring speed of the two sets of sludge stirring rods 23, and speeds up the crushing of the sludge. The rotation speed of the fourth motor 151 is adjusted to X2, and the running time is Y2, which increases the stirring speed of the two sets of sludge pressing rollers 24. After the sludge is pressed flat, it falls downward onto the first conveyor belt 31 for conveying. At this time, the equipment program starts timing. When the running time of the fourth motor 151 reaches Y2, the equipment program controls the fourth motor 151 to stop. The stopping time is Y0. At this time, the two sets of sludge stirring rods 23 continue to rotate to prevent the sludge from accumulating in the feed box 11 and drying and clumping due to a long period of stopping, thus avoiding damage to the equipment and reducing the maintenance cost of the factory. When the stopping time is up, the equipment program controls the above operation to be repeated.

[0051] If V2 ≤ the rotation speed of the two sets of speed sensors 22 ≤ V3, the equipment program determines that the sludge in this batch has low water content and poor fluidity. The equipment program controls the rotation speed of the second motor 131 to V3, increases the stirring speed of the two sets of sludge stirring rods 23, and speeds up the crushing speed of the sludge. The rotation speed of the fourth motor 151 is adjusted to X3, and the running time is Y1. The fourth motor 151 drives the two sets of sludge pressing rollers 24 to rotate quickly, pressing the sludge flat and then letting it fall downwards onto the first conveyor belt 31 for conveying. At this time, the equipment program starts timing. When the running time of the fourth motor 151 reaches Y1, the equipment program controls the fourth motor 151 to stop, and the stopping time is Y0. At this time, the two sets of sludge stirring rods 23 continue to rotate to prevent the sludge from accumulating in the feed box 11 and drying and clumping due to a long period of stopping, thus avoiding damage to the device and reducing the maintenance cost of the factory. When the stopping time is up, the equipment program controls the above operation to repeat.

[0052] By using two sets of sludge stirring rods 23, two sets of sludge pressing rollers 24, two sets of speed sensors 22, and the equipment program in conjunction with these components, the moisture content of the batch of sludge can be determined based on the different stirring speeds. The pressing speed and feeding time can be adjusted according to the moisture content. When the sludge has a high moisture content, stirring is slow to prevent mud and water from splashing into the production workshop and affecting the workshop environment. Simultaneously, the sludge is slowly pressed and the running time is increased to increase the sludge feeding amount. This increases output while preventing continuous feeding that could cause sludge to flow everywhere. When the sludge has a low moisture content, stirring is rapid to prevent the sludge from accumulating in the feed box 11 and drying and clumping due to prolonged inactivity. Simultaneously, the sludge is quickly pressed and the running time is reduced to decrease the sludge feeding amount, ensuring the sludge is completely dried and preventing surface drying and internal dampness, thus reducing rework costs for the factory.

[0053] Sludge drying process:

[0054] During the above operations, the equipment program controls the sludge drying process. The program sets the rotation speed of the third motor 141 to M1, M2, and M3, with M1 being the minimum and M3 the maximum. This can be adjusted according to specific needs. When the program detects that the rotation speed of the second motor 131 is V1, it determines that the sludge has a high water content. The program then adjusts the rotation speed of the third motor 141 to M1. The third motor 141 drives the first conveyor belt 31 to rotate slowly, conveying the flattened sludge backward. Simultaneously, the program controls the first electric valve 252 to open, and the heating fan 25 distributes hot air. After flowing into the first ventilation pipe 251, it is sprayed downward to perform secondary drying on the sludge conveyed on the first conveyor belt 31, thereby improving the drying efficiency and ensuring that the sludge can be completely dried. During the drying process, the heat-conducting rod 35 conducts heat to the sludge shovel 351 to heat it, so that it can quickly shovel off the sludge blocks and turn them over, thereby improving the sludge drying efficiency. Then, the equipment program controls the start of the cooler 36, and the fan 343 blows air into the cooler box 34. The cold air is then blown out from the second ventilation pipe 341 and the third ventilation pipe 342 to perform low-temperature drying on the sludge conveyed on the first conveyor belt 31.

[0055] When the equipment program detects that the speed of the second motor 131 is V2, the equipment program determines that the sludge moisture content is normal. The equipment program controls the speed of the third motor 141 to be adjusted to M2. The third motor 141 drives the first conveyor belt 31 to rotate, so that the flattened sludge is conveyed backward. At the same time, the equipment program controls the first electric valve 252 to close, and the heating fan 25 sprays hot air downward to dry the sludge conveyed on the first conveyor belt 31, improves the drying efficiency, and ensures that the sludge can be completely dried. Then, the equipment program controls the refrigerator 36 to start. After the fan 343 blows air into the refrigeration box 34, the cold air blows out from the second ventilation pipe 341 and the third ventilation pipe 342 to perform low-temperature drying operation on the sludge conveyed on the first conveyor belt 31.

[0056] When the equipment program detects that the speed of the second motor 131 is V3, the equipment program determines that the sludge has low water content. The equipment program controls the speed of the third motor 141 to be adjusted to M3. The third motor 141 drives the first conveyor belt 31 to rotate quickly, so that the flattened sludge is conveyed backward. At the same time, the equipment program controls the first electric valve 252 to open. The heating fan 25 diverts hot air to the first ventilation pipe 251 and sprays it downward to perform secondary drying on the sludge conveyed on the first conveyor belt 31, improves the drying efficiency, and ensures that the sludge can be completely dried. During the drying process, the heat-conducting rod 35 conducts heat to the sludge shovel 351 to heat it, so that it can quickly shovel off the sludge blocks and turn them over, improving the sludge drying efficiency. Then the equipment program controls the refrigerator 36 to start. The fan 343 blows air into the refrigeration box 34, and the cold air blows out from the second ventilation pipe 341 and the third ventilation pipe 342 to perform low-temperature drying operation on the sludge conveyed on the first conveyor belt 31.

[0057] By coordinating the use of the third motor 141, the first electric valve 252, the cooler 36, and the equipment program, the feeding speed can be adjusted according to the different moisture contents of the sludge. When the sludge has a high moisture content, the feeding speed is reduced to prevent the mud and water from flowing everywhere due to excessive speed. When the sludge has a low moisture content, the feeding speed is increased to improve production efficiency. When the sludge has a high moisture content, the hot air is diverted and then used for secondary drying to improve the sludge drying efficiency. At the same time, the heat is used again to heat the sludge shovel blade 351, which can quickly shovel off the sludge and turn it over to avoid the phenomenon of the sludge surface drying while the inside is moist. In conjunction with low-temperature drying operation, the sludge is dried more thoroughly, reducing the factory's rework costs.

[0058] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method of using a low-temperature sludge drying device, comprising a sludge drying box (1), characterized in that, Four sets of shock-absorbing bases are fixedly installed around the bottom of the sludge drying box (1). A feed box (11) is detachably installed at one end of the top of the sludge drying box (1). Three sets of mounting seats are arrayed on one side of the sludge drying box (1), namely a first mounting seat (12), a second mounting seat (13), and a third mounting seat (14). A first motor (121) is detachably installed on the first mounting seat (12), and a second motor (131) is detachably installed on the second mounting seat (13). A third motor (141) is detachably installed on the third mounting base (14). A mounting plate (15) is also fixedly installed on one side of the sludge drying box (1), located on one side of the second mounting base (13). A fourth motor (151) is detachably installed on the mounting plate (15). A heat dissipation plate (16) is detachably installed on the other side of the sludge drying box (1). Several sets of mounting holes are provided on the box body of the sludge drying box (1). A drying chamber (17) is also provided inside the sludge drying box (1). The sludge drying box (1) is also equipped with a stirring assembly (2) and a drying assembly (3). The stirring assembly (2) includes a fourth mounting base (21), a speed sensor (22), a sludge stirring rod (23), a sludge pressing roller (24), a heating fan (25), a first ventilation pipe (251), and a first electric valve (252). Two sets of the fourth mounting bases (21) are installed at intervals on one side of the inside of the feed box (11). One end of the two sets of sludge stirring rods (23) is connected to the two sets of fourth mounting bases (21), and the other end passes through the mounting hole on the sludge drying box (1) and is connected to the rotating shaft of the second motor (131). Two sets of speed sensors (22) are set on the two sets of fourth mounting bases (21). The method of using the aforementioned low-temperature sludge drying device includes the following steps: S1. When the equipment program sets the speed of the second motor (131) to V1, the second motor (131) drives the two sets of sludge stirring rods (23) to rotate slowly, and performs stirring and crushing operations on the input sludge. At this time, the equipment program detects whether the speed of the two sets of speed sensors (22) is V1. If it is ≤V1, the equipment program determines that the batch of sludge has a high water content and good fluidity. The equipment program controls the speed of the fourth motor (151) to be adjusted to X1, and the running time is Y3. The fourth motor (151) drives the two sets of sludge pressing rollers (24) to rotate slowly. Slow rotation, pressing the sludge flat and letting it fall downward onto the first conveyor belt (31) for conveying. At this time, the equipment program starts timing. When the running time of the fourth motor (151) reaches Y3, the equipment program controls the fourth motor (151) to stop. The stopping time is Y0. At this time, the two sets of sludge stirring rods (23) continue to rotate slowly to avoid the sludge from accumulating in the feed box (11) due to a long period of stopping, thus preventing mud-water separation, avoiding damage to the equipment, and reducing the maintenance cost of the factory. When the stopping time is up, the equipment program controls the repeat of the above operation. S2. If V1≤ the rotation speed of the two sets of speed sensors (22)≤V2, the equipment program determines that the sludge in this batch has normal water content and good fluidity. The equipment program controls the rotation speed of the second motor (131) to V2, increases the stirring speed of the two sets of sludge stirring rods (23), and speeds up the crushing speed of the sludge. The rotation speed of the fourth motor (151) is adjusted to X2, and the running time is Y2. The stirring speed of the two sets of sludge pressing rollers (24) is increased, and the sludge is pressed flat and then dropped onto the first conveyor belt (31) for conveying. At this time, the equipment program starts timing. When the running time of the fourth motor (151) reaches Y2, the equipment program controls the fourth motor (151) to stop. The stopping time is Y0. At this time, the two sets of sludge stirring rods (23) continue to rotate to prevent the sludge from accumulating in the feed box (11) and drying and caking due to a long period of stopping, thus avoiding damage to the equipment and reducing the maintenance cost of the factory. When the stopping time is up, the equipment program controls the above operation to be repeated. S3. If V2≤ the rotation speed of the two sets of speed sensors (22)≤V3, the equipment program determines that the sludge in this batch has low water content and poor fluidity. The equipment program controls the rotation speed of the second motor (131) to V3, increases the stirring speed of the two sets of sludge stirring rods (23), and speeds up the crushing speed of the sludge. The rotation speed of the fourth motor (151) is adjusted to X3, and the running time is Y1. The fourth motor (151) drives the two sets of sludge pressing rollers (24) to rotate quickly, presses the sludge flat, and then lets it fall down onto the first conveyor belt (31) for conveying. At this time, the equipment program starts timing. When the running time of the fourth motor (151) reaches Y1, the equipment program controls the fourth motor (151) to stop. The stopping time is Y0. At this time, the two sets of sludge stirring rods (23) continue to rotate to prevent the sludge from accumulating in the feed box (11) and drying and caking due to long-term stopping, thus avoiding damage to the device and reducing the maintenance cost of the factory. When the stopping time is up, the equipment program controls the above operation to repeat.

2. The method of using the sludge low-temperature drying device according to claim 1, characterized in that, Two sets of sludge pressing rollers (24) are set inside one side of the feed box (11) and located on one side of the two sets of sludge stirring rods (23). One end of the two sets of sludge pressing rollers (24) passes through the mounting hole on the sludge drying box (1) and is connected to the rotating shaft of the fourth motor (151). The heating fan (25) is detachably installed inside one end of the sludge drying box (1). One end of the first ventilation pipe (251) is connected to the heating fan (25), and the other end extends into the drying chamber (17). The first electric valve (252) is fixedly installed inside the first ventilation pipe (251).

3. The method of using the sludge low-temperature drying device according to claim 2, characterized in that, The drying assembly (3) includes a first conveyor belt (31), a second conveyor belt (32), a discharge pipe (33), a refrigeration box (34), a second ventilation pipe (341), a second electric valve (3411), a third ventilation pipe (342), a third electric valve (3421), a fan (343), a heat-conducting rod (35), a sludge shovel (351), and a cooler (36). The first conveyor belt (31) and the second conveyor belt (32) are longitudinally spaced on one side inside the sludge drying box (1). The discharge pipe (33) is fixedly installed at the bottom inside the sludge drying box (1), corresponding to the position of the second conveyor belt (32). The refrigeration box... (34) Set on the other side inside the sludge drying box (1), one end of the second ventilation pipe (341) is connected to the refrigeration box (34), and the other end extends into the drying chamber (17). The second ventilation pipe (341) is located on one side of the first conveyor belt (31). The second electric valve (3411) is fixedly installed in the second ventilation pipe (341). One end of the third ventilation pipe (342) is connected to the refrigeration box (34), and the other end extends into the drying chamber (17). The third ventilation pipe (342) is located on one side of the second conveyor belt (32). The third electric valve (3421) is fixedly installed in the third ventilation pipe (342).

4. The method of using the sludge low-temperature drying device according to claim 3, characterized in that, The blower (343) is located on the other side of the sludge drying box (1), on one side of the refrigeration box (34), and the refrigerator (36) is detachably installed in the refrigeration box (34).

5. The method of using the sludge low-temperature drying device according to claim 4, characterized in that, The two sets of heat-conducting rods (35) are fixedly installed on the inner box of the sludge drying box (1) and located on one side of the first conveyor belt (31). The sludge shovel (351) is detachably installed on the bottom frame of the first conveyor belt (31). One end of the two sets of heat-conducting rods (35) extends into the drying chamber (17) and the other end is connected to the sludge shovel (351).

6. The method of using the sludge low-temperature drying device according to claim 5, characterized in that, The sludge drying box (1) is placed on the floor of the production workshop.

7. The method of using the sludge low-temperature drying device according to claim 6, characterized in that, The interior of the sludge drying box (1) is hollow.

8. The method of using the sludge low-temperature drying device according to any one of claims 1 to 7, characterized in that: Includes the following steps: S1. When the equipment program detects that the rotation speed of the second motor (131) is V1, the equipment program determines that the sludge has a high water content. The equipment program controls the rotation speed of the third motor (141) to M1. The third motor (141) drives the first conveyor belt (31) to rotate slowly, so that the flattened sludge is conveyed backward. At the same time, the equipment program controls the first electric valve (252) to open, and the heating fan (25) diverts hot air to the first ventilation pipe (251) and sprays it downward to perform secondary drying on the sludge conveyed on the first conveyor belt (31). To improve drying efficiency and ensure that the sludge can be completely dried, during the drying process, the heat-conducting rod (35) conducts heat to the sludge shovel (351) to heat it, so that it can quickly shovel off the sludge blocks and turn them over, thereby improving the sludge drying efficiency. Then, the equipment program controls the start of the cooler (36), and the fan (343) blows the air into the cooler box (34). The cold air is then blown out from the second ventilation pipe (341) and the third ventilation pipe (342) to perform low-temperature drying operation on the sludge conveyed on the first conveyor belt (31). S2. When the equipment program detects that the speed of the second motor (131) is V2, the equipment program determines that the sludge moisture content is normal. The equipment program controls the speed of the third motor (141) to be adjusted to M2. The third motor (141) drives the first conveyor belt (31) to rotate, so that the flattened sludge is conveyed backward. At the same time, the equipment program controls the first electric valve (252) to close, and the heating fan (25) sprays hot air downward to dry the sludge conveyed on the first conveyor belt (31), improves the drying efficiency, and ensures that the sludge can be completely dried. Then the equipment program controls the refrigerator (36) to start. After the fan (343) blows the air into the refrigeration box (34), the cold air blows out from the second ventilation pipe (341) and the third ventilation pipe (342) to perform low-temperature drying operation on the sludge conveyed on the first conveyor belt (31). S3. When the equipment program detects that the rotation speed of the second motor (131) is V3, the equipment program determines that the sludge has low water content. The equipment program controls the rotation speed of the third motor (141) to M3. The third motor (141) drives the first conveyor belt (31) to rotate rapidly, so that the flattened sludge is conveyed backward. At the same time, the equipment program controls the first electric valve (252) to open, and the heating fan (25) diverts hot air to the first ventilation pipe (251) and sprays it downward to perform secondary drying on the sludge conveyed on the first conveyor belt (31). To improve drying efficiency and ensure that the sludge can be completely dried, during the drying process, the heat-conducting rod (35) conducts heat to the sludge shovel (351) to heat it, so that the sludge blocks can be quickly shoveled off and turned over to improve the sludge drying efficiency. Then the equipment program controls the start of the cooler (36), and the fan (343) blows the air into the cooler box (34). The cold air is blown out from the second ventilation pipe (341) and the third ventilation pipe (342) to perform low-temperature drying operation on the sludge conveyed on the first conveyor belt (31).

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