Sludge low-temperature drying device and use method thereof

Abstract

The invention discloses a sludge low-temperature drying device and a use method thereof, and belongs to the technical direction of sludge drying, the sludge low-temperature drying device comprises a sludge drying box, one end of the top of the sludge drying box is detachably provided with a feeding box, one side of the sludge drying box is provided with three groups of mounting seats in an array manner, and the three groups of mounting seats are respectively a first mounting seat, a second mounting seat and a third mounting seat; through cooperative use of the two sludge stirring rods and the two sludge pressing rollers, the water content of the batch of sludge can be judged according to different sludge stirring rotating speeds, the flattening speed and the discharging time can be changed according to different sludge water contents, when the sludge water content is high, stirring is slow, and the sludge pressing efficiency is improved. The mud water is prevented from splashing around into a production workshop to influence the workshop environment, meanwhile, the sludge is slowly flattened, the operation time is prolonged, the discharging amount of the sludge is increased, and the situation that the sludge flows around due to continuous discharging can be avoided while the yield is increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of sludge drying, and specifically relates to a sludge low-temperature drying device and a method for using the same. Background Art

[0002] The sludge discharged from urban sewage treatment plants has a moisture content of about 80% after gravity concentration and mechanical dehydration. It is large in size and has a low calorific value. It is not suitable for aerobic composting, incineration, building material utilization, or even landfill. It must be further dehydrated and dried. Sludge drying, also known as sludge dehydration, refers to the process of removing most of the water content from the sludge through infiltration or evaporation. It generally refers to the use of self-evaporation facilities such as sludge drying fields (beds). After the sludge is concentrated, physical methods are used to further reduce the moisture content of the sludge to facilitate the transportation, accumulation, utilization or further treatment of the sludge. Dehydration (drying) includes natural evaporation and mechanical dehydration. Both are measures to further reduce the moisture content of the sludge. After the sludge is concentrated, physical methods are used to further reduce the moisture content of the sludge to facilitate the transportation, accumulation, utilization or further treatment of the sludge.

[0003] The existing patent publication number is CN 110228928 A discloses a membrane covered sludge drying device, comprising a bottom plate, a seepage pipe and a wall, wherein the wall is arranged on the upper side of the bottom plate, the seepage pipe is arranged inside the bottom 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 inside the wall, a lifting column is arranged on the upper side of the wall, 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 on the lower side of the temperature and humidity sensor, a ventilation pipe is arranged in the middle of the bracket, a motor is arranged in 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 all-in-one is arranged in the operation box, a 4G transmitter is arranged on one side of the PLC all-in-one, a speaker is arranged on the outside of the operation box, and an adjustment button is arranged on the PLC all-in-one. It only automatically measures the sludge dryness and humidity and the accumulated heat, and the drying efficiency is low, which needs some improvements.

[0004] Therefore, it is necessary to design a sludge low-temperature drying device with strong practicality. Summary of the invention

[0005] The purpose of the present invention is to provide a sludge low-temperature drying device and a method of using the same in order to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a sludge low-temperature drying device and a method for using the same, comprising a sludge drying box, wherein four groups of shock-absorbing bases are fixedly installed around the bottom of the 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 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 is detachably installed on the first mounting seat, a second motor is detachably installed on the second mounting seat, and a third motor is detachably installed on the third mounting seat, a mounting plate is also fixedly installed on one side of the sludge drying box, located on one side of the second mounting seat, a fourth motor is detachably installed on the mounting plate, a heat dissipation plate is detachably installed on the other side of the sludge drying box, a plurality of groups of mounting holes are arranged on the box body of the sludge drying box, and a drying chamber is also arranged inside the sludge drying box;

[0007] The sludge drying box is also provided with a stirring component and a drying component;

[0008] The stirring assembly includes a fourth mounting seat, a speed detector, a sludge stirring rod, a sludge pressing roller, a heating fan, a first ventilation duct, and a first electric valve. Two groups of the fourth mounting seats are installed at intervals on one side of the inner side of the feed box. One end of the two groups of sludge stirring rods is connected to the two groups of fourth mounting seats, 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. The two groups of speed detectors are arranged on the two groups of fourth mounting seats.

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

[0010] The present invention further illustrates that the drying component 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 refrigerator. The first conveyor belt and the second conveyor belt are longitudinally spaced apart and arranged on one side of the interior of the sludge drying box. The discharge pipe is fixedly installed at the bottom end of the interior of the sludge drying box, corresponding to the position of the second conveyor belt. The refrigeration box is arranged 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. The third electric valve is fixedly installed in the third ventilation pipe.

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

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

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

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

[0015] The following steps are involved:

[0016] S1. When the equipment program sets the speed of the second motor to V1, the second motor drives two sets of sludge stirring rods to rotate slowly to stir and crush the input sludge. At this time, the equipment program detects whether the speed of the two sets of speed sensors is V1. If it is ≤V1, the equipment program determines that the sludge in this batch has 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 two sets of sludge pressing rollers to rotate slowly, and after pressing the sludge flat, it falls down on the first conveyor belt for transportation. 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, and the stop 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 long-term stop, resulting in mud and water separation, avoiding damage to the device, and reducing the maintenance cost of the factory. When the stop time is up, the equipment program controls to repeat the above operation;

[0017] S2. If V1≤the speed of the two speed sensors≤V2, the equipment program determines that the water content of the batch of sludge is normal and the fluidity is good. The equipment program controls the speed of the second motor to be adjusted to V2, increases the stirring speed of the two sets of sludge stirring rods, and speeds up the sludge crushing speed. The speed of the fourth motor is adjusted to X2, and the running time is Y2. The stirring speed of the two sets of sludge pressing rollers is increased, and the sludge is pressed and flattened so that it falls down onto the first conveyor belt for transportation. 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, and the stop time is Y0. At this time, the two sets of sludge stirring rods continue to rotate to prevent the sludge from being accumulated in the feed box due to long-term stop and drying and agglomeration, thereby avoiding damage to the device and reducing the maintenance cost of the factory. When the stop time is up, the equipment program controls to repeat the above operation;

[0018] S3. If V2≤the speed of the two speed sensors≤V3, the equipment program determines that the water content of the batch of sludge is low and the fluidity is poor. The equipment program controls the speed of the second motor to be adjusted to V3, increases the stirring speed of the two sets of sludge stirring rods, and speeds up the sludge crushing speed. The 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, and after pressing the sludge flat, it falls down onto the first conveyor belt for transportation. 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, and the stop time is Y0. At this time, the two sets of sludge stirring rods continue to rotate to prevent the sludge from being accumulated in the feed box due to long-term stop and drying and agglomeration, thereby avoiding damage to the device and reducing the maintenance cost of the factory. When the stop time is up, the equipment program controls to repeat the above operation;

[0019] The following steps are involved:

[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, and 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 transported backward. At the same time, the equipment program controls the first electric valve to open, and the heating fan diverts the hot air to the first ventilation pipe and then sprays it downward, so as to perform secondary drying on the sludge transported on the first conveyor belt, improve the drying efficiency, and ensure that the sludge can be completely dried. During the drying process, the heat conducting rod conducts heat to the sludge shovel to heat it, so that it can quickly shovel off the sludge blocks and turn them over, so as to improve the sludge drying efficiency. Then the equipment program controls the refrigerator to start, and after the fan blows the air into the refrigeration box, the cold air is blown out from the second ventilation pipe and the third ventilation pipe to perform low-temperature drying operation on the sludge transported 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 water content of the sludge is normal, and 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 transported 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 transported on the first conveyor belt, thereby improving the drying efficiency and ensuring that the sludge can be completely dried. Then the equipment program controls the refrigerator to start. After the fan blows air into the refrigeration box, cold air is blown out from the second ventilation duct and the third ventilation duct to perform low-temperature drying operation on the sludge transported 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 a low water content, and 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 rapidly, so that the flattened sludge is transported backward. At the same time, the equipment program controls the first electric valve to open, and the heating fan diverts the hot air to the first ventilation duct and then sprays it downward, so as to perform secondary drying on the sludge transported on the first conveyor belt, thereby improving the drying efficiency and ensuring that the sludge can be completely dried. During the drying process, the heat conducting rod conducts heat to the sludge shovel 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 refrigerator to start, and after the fan blows air into the refrigeration box, the cold air is blown out from the second ventilation duct and the third ventilation duct to perform low-temperature drying operation on the sludge transported 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 groups of sludge stirring rods, two groups of sludge pressing rollers, two groups of speed sensors and equipment programs, can judge the water content of the batch of sludge according to the different sludge stirring speeds, and change the flattening speed and feeding time according to the different sludge water content. When the sludge has a high water content, it is stirred slowly to avoid mud and water splashing everywhere in the production workshop to affect the workshop environment. At the same time, the sludge is slowly flattened and the operation time is increased, and the sludge feeding amount is increased. While increasing the output, it can avoid continuous feeding causing the sludge to flow everywhere. When the sludge has a low water content, it is stirred quickly to prevent the sludge from accumulating in the feed box due to long-term stoppage and drying and agglomeration. At the same time, the sludge is quickly flattened and the operation time is reduced, and the sludge feeding amount is reduced, ensuring that the sludge can be completely dried, thereby reducing the rework cost of the factory.

[0024] Through the coordinated use of the third motor, the first electric valve, the refrigerator and the equipment program, the feeding speed can be changed according to the different water content of the sludge. When the water content of the sludge is high, the feeding speed is reduced to avoid the mud and water flowing everywhere due to too fast speed. When the water content of the sludge is low, the feeding speed is increased to improve the production efficiency. When the water content of the sludge is high, the hot air is diverted and then dried for a second time to improve the sludge drying efficiency. At the same time, the heat is used for heating the sludge shovel blade so that it can quickly shovel off the sludge and turn it over to avoid the phenomenon that the sludge surface is dry and the inside is wet. In addition, the low-temperature drying operation is carried out to make the sludge dry more thoroughly and reduce the rework cost of the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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:

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

[0027] Figure 2 The present invention Figure 1 A magnified schematic diagram of the structure in area A;

[0028] Figure 3 The present invention Figure 1 Schematic diagram of the internal structure in area B;

[0029] Figure 4 It 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 It is a schematic diagram of the internal structure of the pipeline of the present invention;

[0032] Figure 7 The present invention Figure 5 Schematic diagram of the enlarged structure in area C.

[0033] In the figure: 1, sludge drying box; 11, feed box; 12, first mounting seat; 121, first motor; 13, second mounting seat; 131, second motor; 14, third mounting seat; 141, third motor; 15, mounting plate; 151, fourth motor; 16, heat sink; 17, drying chamber;

[0034] 2. stirring assembly; 21. fourth mounting seat; 22. speed detector; 23. sludge stirring rod; 24. sludge pressing roller; 25. heating fan; 251. first ventilation pipe; 252. first electric valve;

[0035] 3. Drying component; 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 conducting rod; 351. Sludge shovel; 36. Refrigerator. DETAILED DESCRIPTION

[0036] 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.

[0037] See also Figure 1-7 The present invention provides a technical solution: a sludge low-temperature drying device and a method for using the same, comprising a sludge drying box 1, the sludge drying box 1 is placed on the floor of a production workshop, the interior of the sludge drying box 1 is hollow, four groups 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 groups of mounting seats are installed in an array 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, and a first motor 121 is detachably installed on the first mounting seat 12 , a second motor 131 is detachably mounted on the second mounting seat 13, a third motor 141 is detachably mounted on the third mounting seat 14, a mounting plate 15 is fixedly mounted on one side of the sludge drying box 1, and a fourth motor 151 is detachably mounted on the mounting plate 15. The four motors are used to provide power for driving, and a heat sink 16 is detachably mounted on the other side of the sludge drying box 1. A plurality of mounting holes (not shown in the figure) are provided on the box body of the sludge drying box 1 for matching and connecting, and a drying chamber 17 is also provided inside the sludge drying box 1;

[0038] The sludge drying box 1 is also provided with a stirring component 2 and a drying component 3;

[0039] The stirring assembly 2 includes a fourth mounting seat 21, a speed detector 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 groups of fourth mounting seats 21 are installed at intervals on one side of the interior of the feed box 11. One end of the two groups of sludge stirring rods 23 is connected to the two groups of fourth mounting seats 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 groups of speed detectors 22 are arranged on the two groups of fourth mounting seats 21 for detecting the speed during sludge stirring. Two groups of sludge pressing rollers 24 are arranged on one side of the interior of the feed box 11, located on one side of the two groups of sludge stirring rods 23. One end of the two groups 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 mounted at one end of the interior 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, so as to deliver hot air to the sludge to cooperate with the drying operation. The first electric valve 252 is fixedly mounted inside the first ventilation pipe 251, so as to cooperate with controlling the gas circulation.

[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 refrigerator 36. The first conveyor belt 31 and the second conveyor belt 32 are longitudinally spaced apart and arranged on one side of the interior of the sludge drying box 1. The two sets of conveyor belts are used to transport the sludge for drying. The discharge pipe 33 is fixedly installed at the bottom end of the interior of the sludge drying box 1, corresponding to the position of the second conveyor belt 32, and is used to output the sludge that has been dried. The refrigeration box 34 is arranged on the other side of the interior of the sludge drying box 1, and is used to cooperate with the low-temperature drying. One end of the second ventilation pipe 341 is connected to the refrigeration box 34, and the other end extends to the drying chamber 17. The second ventilation pipe 341 is located on one side of the first conveyor belt 31, and is used for low-temperature drying of the sludge transported on the first conveyor belt 31. The second electric valve 3411 is fixedly installed in the second ventilation pipe 341, and is used for coordinating and controlling gas circulation. One end of the third ventilation pipe 342 is connected to the refrigeration box 34, and the other end extends to the drying chamber 17. The third ventilation pipe 342 is located on one side of the second conveyor belt 32, and is used for low-temperature drying of the sludge transported on the second conveyor belt 32. The third electric valve 3421 is fixedly installed in the third ventilation pipe 342, and is used for coordinating and controlling gas circulation.

[0042] The fan 343 is arranged at the other side of the interior of the sludge drying box 1, and is located at one side of the refrigeration box 34. The refrigerator 36 is detachably installed in the refrigeration box 34, and is used for low-temperature drying of the sludge;

[0043] Two sets of heat-conducting rods 35 are fixedly mounted on the inner box of the sludge drying box 1, located on one side of the first conveyor belt 31, and are used to recover the heat of the hot air blown out by the heating fan 25. The sludge shovel blade 351 is detachably mounted on the bottom frame of the first conveyor belt 31, and is used to shovel the sludge transported 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 blade 351.

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

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

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

[0047] Sludge conveying operation:

[0048] When the staff needs to perform low-temperature drying operation on the sludge, the staff first uses tools to move the sludge conveying pipe to the feed box 11, and then turns on the power of the workshop. At this time, the sludge drying box 1 starts, the equipment program starts, and the equipment program controls the four motors to start. The second motor 131 drives the two groups of sludge stirring rods 23 to rotate, the fourth motor 151 drives the two groups of sludge pressing rollers 24 to rotate, the third motor 141 starts forward and drives the first conveyor belt 31 to rotate, and the first motor 121 starts reversely and drives the second conveyor belt 32 to rotate. After the sludge is input from the feed box 11, it moves downward to the two groups of sludge stirring rods 23 for stirring and conveying. After the agglomerated sludge is fully broken, it is transported downward to the two groups of sludge pressing rollers 24 for flattening. The flattened sludge will fall down on the first conveyor belt 31, and then the equipment program controls the fan 343 and the heating The fan 25 is turned on, the second electric valve 3411 and the third electric valve 3421 are turned on, and the first electric valve 252 is in a closed state. The fan 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 refrigerator 36 is in a closed state, and the transported sludge is dried at room temperature. The heating fan 25 blows hot air downward onto the sludge transported by the first conveyor belt 31 to dry the sludge. The dried sludge is then transported to the top of the second conveyor belt 32. At this time, the sludge shovel 351 shovels the sludge on the first conveyor belt 31 and makes it fall on the second conveyor belt 32 for subsequent secondary drying and transportation operations. At the same time, the sludge can be turned over to improve the drying efficiency. The dried sludge will fall from the discharge pipe 33 to the subsequent collection device, which is convenient for the staff to collect it in a centralized manner.

[0049] In the process of performing the above operations, the equipment program detects the rotational speeds of the two groups of sludge stirring rods 23 through two groups of rotational 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 value and V3 is the maximum value, which can be adjusted according to specific needs. The rotational speed of the fourth motor 151 is X1, X2, and X3, where X1 is the minimum value and X2 is the maximum value, which can be adjusted according to specific needs. The running time of the fourth motor 151 is Y1, Y2, and Y3, and the stop time is Y0, where Y1 is the minimum value and Y3 is the maximum value, which 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 groups of sludge stirring rods 23 to rotate slowly to stir and crush the input sludge. At this time, the equipment The program detects whether the rotation speed of the two groups of rotation speed sensors 22 is V1. If ≤ V1, the equipment program determines that the water content of the batch of sludge is high and the fluidity is good. The equipment program controls the rotation speed of the fourth motor 151 to be adjusted to X1, and the running time is Y3. The fourth motor 151 drives the two groups of sludge pressing rollers 24 to rotate slowly, and after pressing the sludge flat, it makes it fall down onto the first conveyor belt 31 for transportation. 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, and the stop time is Y0. At this time, the two groups of sludge stirring rods 23 continue to rotate slowly to avoid the sludge from accumulating in the feed box 11 due to long-term stop, resulting in mud and water separation, avoiding damage to the device, and reducing the maintenance cost of the factory. When the stop time is up, the equipment program controls to repeat the above operation;

[0050] If V1≤the speed of the two groups of speed sensors 22≤V2, the equipment program determines that the water content of the batch of sludge is normal and the fluidity is good. The equipment program controls the speed of the second motor 131 to be adjusted to V2, increases the stirring speed of the two groups of sludge stirring rods 23, and accelerates the crushing speed of the sludge. The speed of the fourth motor 151 is adjusted to X2, and the running time is Y2. The stirring speed of the two groups of sludge pressing rollers 24 is increased, and the sludge is pressed and flattened so that it falls downward onto the first conveyor belt 31 for transportation. 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, and the stop time is Y0. At this time, the two groups of sludge stirring rods 23 continue to rotate to prevent the sludge from being accumulated in the feed box 11 due to long-term stop, drying and agglomeration, avoiding damage to the device, and reducing the maintenance cost of the factory. When the stop time is up, the equipment program controls to repeat the above operation;

[0051] If V2≤the speed of the two groups of speed sensors 22≤V3, the equipment program determines that the water content of the batch of sludge is low and the fluidity is poor. The equipment program controls the speed of the second motor 131 to be adjusted to V3, increases the stirring speed of the two groups of sludge stirring rods 23, and speeds up the sludge crushing speed. The speed of the fourth motor 151 is adjusted to X3, and the running time is Y1. The fourth motor 151 drives the two groups of sludge pressing rollers 24 to rotate rapidly, and after pressing the sludge flat, it falls down onto the first conveyor belt 31 for transportation. 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 stop time is Y0. At this time, the two groups of sludge stirring rods 23 continue to rotate to prevent the sludge from being accumulated in the feed box 11 due to long-term stop, drying and agglomeration, avoiding damage to the device, and reducing the maintenance cost of the factory. When the stop time is up, the equipment program controls to repeat the above operation;

[0052] By using two groups of sludge stirring rods 23, two groups of sludge pressing rollers 24, and two groups of speed sensors 22 in coordination with the equipment program, the water content of the batch of sludge can be judged according to the different sludge stirring speeds, and the flattening speed and feeding time can be changed according to the different sludge water content. When the sludge has a high water content, it is stirred slowly to prevent mud and water from splashing everywhere in the production workshop and affecting the workshop environment. At the same time, the sludge is flattened slowly and the operation time is increased to increase the sludge feeding amount. While increasing the output, it can avoid continuous feeding causing the sludge to flow everywhere. When the sludge has a low water content, it is stirred quickly to prevent the sludge from accumulating and drying in the feed box 11 due to long-term suspension. At the same time, the sludge is flattened quickly and the operation time is reduced to reduce the sludge feeding amount, ensuring that the sludge can be completely dried, avoiding the phenomenon of surface drying and internal moisture, and reducing the rework cost of the factory.

[0053] Sludge drying operation:

[0054] During the above operation, the equipment program controls the sludge drying operation. The equipment program sets the speed of the third motor 141 to M1, M2, and M3, where M1 is the minimum value and M3 is the maximum value. The speed can be adjusted according to specific needs. When the equipment program detects that the speed of the second motor 131 is V1, the equipment program determines that the sludge has a high water content, and the equipment program controls the speed of the third motor 141 to be adjusted to M1. The third motor 141 drives the first conveyor belt 31 to rotate slowly, so that the flattened sludge is transported backward. At the same time, the equipment program controls the first electric valve 252 to open, and the heating fan 25 distributes the hot air. After flowing into the first ventilation pipe 251, it is sprayed downward to perform secondary drying on the sludge transported 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 blade 351 to heat it, so that it can quickly shovel off the sludge blocks and turn it over to improve the sludge drying efficiency. Then, the equipment program controls the refrigerator 36 to start, and after the fan 343 blows air into the refrigeration 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 transported 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 water content of the sludge is normal, and 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 transported backward. At the same time, the equipment program controls the first electric valve 252 to be closed, and the heating fan 25 sprays hot air downward to dry the sludge transported on the first conveyor belt 31, thereby improving the drying efficiency and ensuring that the sludge can be completely dried. Then the equipment program controls the refrigerator 36 to start, and after the fan 343 blows air into the refrigeration box 34, the cold air is blown out from the second ventilation pipe 341 and the third ventilation pipe 342 to perform a low-temperature drying operation on the sludge transported 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 a low water content, and 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 transported backward. At the same time, the equipment program controls the first electric valve 252 to open, and the heating fan 25 diverts the hot air to the first ventilation pipe 251 and then sprays it downward, so as to perform secondary drying on the sludge transported on the first conveyor belt 31, improve the 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 blade 351 to heat it, so that it can quickly shovel off the sludge block and turn it over, so as to improve the sludge drying efficiency. Then the equipment program controls the refrigerator 36 to start, and after the fan 343 blows air into the refrigeration box 34, the cold air is blown out from the second ventilation pipe 341 and the third ventilation pipe 342, so as to perform low-temperature drying operation on the sludge transported on the first conveyor belt 31.

[0057] By using the third motor 141, the first electric valve 252, the refrigerator 36 and the equipment program in coordination, the feeding speed can be changed according to the different water content of the sludge. When the water content of the sludge is high, the feeding speed is reduced to avoid the mud and water flowing everywhere due to excessive speed. When the water content of the sludge is low, the feeding speed is increased to improve the production efficiency. When the water content of the sludge is high, the hot air is diverted and then dried again to improve the sludge drying efficiency. At the same time, the heat is used for heating the sludge shovel blade 351 for a second time, so that it can quickly shovel off the sludge and turn it over to avoid the phenomenon that the sludge surface is dry and the inside is wet. In addition, the low-temperature drying operation is carried out to make the sludge dry more thoroughly and reduce the rework cost of the factory.

[0058] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying 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.

[0059] 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 sludge low temperature drying device, comprising a sludge drying box (1), characterized in that: Four groups 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 groups of mounting seats are installed in an array 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 installed on the second mounting seat (13); A third motor (141) is detachably mounted on the third mounting seat (14); a mounting plate (15) is fixedly mounted on one side of the sludge drying box (1), and is located on one side of the second mounting seat (13); a fourth motor (151) is detachably mounted on the mounting plate (15); a heat sink (16) is detachably mounted on the other side of the sludge drying box (1); a plurality of mounting holes are arranged on the box body of the sludge drying box (1); and a drying chamber (17) is also arranged inside the sludge drying box (1); The sludge drying box (1) is also provided with a stirring component (2) and a drying component (3); The stirring assembly (2) comprises a fourth mounting seat (21), a rotation speed detector (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 groups of the fourth mounting seats (21) are installed at intervals on one side of the interior of the feed box (11). One end of the two groups of sludge stirring rods (23) is connected to the two groups of fourth mounting seats (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). The two groups of rotation speed detectors (22) are arranged on the two groups of fourth mounting seats (21).

2. A sludge low temperature drying device according to claim 1, characterized in that: The two groups of sludge pressing rollers (24) are arranged on one side of the interior of the feed box (11), and are located on one side of the two groups of sludge stirring rods (23); one end of the two groups of sludge pressing rollers (24) penetrates the mounting holes on the sludge drying box (1) and is connected to the rotating shaft of the fourth motor (151); the heating fan (25) is detachably mounted on one end of the interior 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 mounted inside the first ventilation pipe (251).

3. A sludge low temperature drying device according to claim 2, characterized in that: The drying component (3) comprises 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 refrigerator (36). The first conveyor belt (31) and the second conveyor belt (32) are arranged longitudinally at intervals on one side of the interior of the sludge drying box (1). The discharge pipe (33) is fixedly installed at the bottom end of the interior of the sludge drying box (1) corresponding to the position of the second conveyor belt (32). The refrigeration box (34) is arranged on the other side of the interior of 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), and 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), and the third electric valve (3421) is fixedly installed in the third ventilation pipe (342).

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

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

6. A 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 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 for using the sludge low-temperature drying device according to claim 7, characterized in that: The following steps are involved: 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 to stir and crush 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 sludge in this batch has a high water content and good fluidity. The equipment program controls the speed of the fourth motor (151) to be adjusted to X1, the running time is Y3, and the fourth motor (151) drives the two sets of sludge pressing rollers (24) to rotate slowly. The sludge is pressed and leveled and then falls onto the first conveyor belt (31) for transportation. 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 stop time is Y0. At this time, the two sets of sludge stirring rods (23) continue to rotate slowly to prevent the sludge from accumulating in the feed box (11) due to long-term stop, resulting in mud-water separation, avoiding damage to the device and reducing the maintenance cost of the factory. When the stop time is up, the equipment program controls to repeat the above operation; S2. If V1≤the speed of the two speed sensors (22)≤V2, the equipment program determines that the water content of the batch of sludge is normal and the fluidity is good. The equipment program controls the speed of the second motor (131) to be adjusted to V2, increases the stirring speed of the two sets of sludge stirring rods (23), and accelerates the crushing speed of the sludge. The 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 and flattened so that it falls downward onto the first conveyor belt (31) for transportation. 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 stop time is Y0. At this time, the two sets of sludge stirring rods (23) continue to rotate to prevent the sludge from being accumulated in the feed box (11) due to long-term stop, drying and agglomeration, avoiding damage to the device, and reducing the maintenance cost of the factory. When the stop time is up, the equipment program controls to repeat the above operation; S3. If V2≤the speed of the two speed sensors (22)≤V3, the equipment program determines that the water content of the batch of sludge is low and the fluidity is poor. The equipment program controls the speed of the second motor (131) to be adjusted to V3, thereby increasing the stirring speed of the two sets of sludge stirring rods (23) and accelerating the crushing speed of the sludge. The 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 rapidly, pressing the sludge flat and causing it to fall downward onto the first conveyor belt (31) for transportation. 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 stop time is Y0. At this time, the two sets of sludge stirring rods (23) continue to rotate to prevent the sludge from being accumulated in the feed box (11) due to long-term stop and drying and agglomeration, thereby avoiding damage to the device and reducing the maintenance cost of the factory. When the stop time is up, the equipment program controls to repeat the above operation.

9. The method for using the sludge low-temperature drying device according to claim 8, characterized in that: The following steps are involved: S1. When the device program detects that the rotation speed of the second motor (131) is V1, the device program determines that the sludge has a high water content, and the device program controls the rotation speed of the third motor (141) to be adjusted to M1. The third motor (141) drives the first conveyor belt (31) to rotate slowly, so that the flattened sludge is transported backward. At the same time, the device program controls the first electric valve (252) to open, and the heating fan (25) diverts the hot air to the first ventilation pipe (251) and then sprays it downward, so as to perform secondary drying on the sludge transported on the first conveyor belt (31). The drying efficiency is improved to 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 refrigerator (36) to start, and the fan (343) blows air into the refrigeration box (34). The cold air is blown out from the second ventilation pipe (341) and the third ventilation pipe (342), and the sludge transported on the first conveyor belt (31) is subjected to low-temperature drying operation; S2, when the device program detects that the rotation speed of the second motor (131) is V2, the device program determines that the water content of the sludge is normal, and the device program controls the rotation speed of the third motor (141) to be adjusted to M2, and the third motor (141) drives the first conveyor belt (31) to rotate, so that the flattened sludge is transported backwards, and at the same time the device program controls the first electric valve (252) to close, and the heating fan (25) sprays hot air downwards to dry the sludge transported on the first conveyor belt (31), thereby improving the drying efficiency and ensuring that the sludge can be completely dried, and then the device program controls the refrigerator (36) to start, and after the fan (343) blows air into the refrigeration box (34), the cold air is blown out from the second ventilation pipe (341) and the third ventilation pipe (342), so as to perform a low-temperature drying operation on the sludge transported on the first conveyor belt (31); S3. When the device program detects that the rotation speed of the second motor (131) is V3, the device program determines that the sludge has a low water content, and the device program controls the rotation speed of the third motor (141) to be adjusted to M3. The third motor (141) drives the first conveyor belt (31) to rotate rapidly, so that the flattened sludge is transported backward. At the same time, the device program controls the first electric valve (252) to open, and the heating fan (25) diverts the hot air to the first ventilation pipe (251) and then sprays it downward, so as to perform secondary drying on the sludge transported on the first conveyor belt (31). The drying efficiency is improved to 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 refrigerator (36) to start, and the fan (343) blows air into the refrigeration box (34). The cold air is blown out from the second ventilation pipe (341) and the third ventilation pipe (342), thereby performing a low-temperature drying operation on the sludge transported on the first conveyor belt (31).

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