Water-soluble fertilizer drying device

Abstract

The invention belongs to the technical field of water-soluble fertilizer drying, and particularly relates to a water-soluble fertilizer drying device which comprises a drying box and a mounting plate arranged on the inner wall of the drying box, and a control box is fixedly connected to the left side wall of the drying box. When the drying device is used for drying the water-soluble fertilizer, multiple parts of the water-soluble fertilizer can be dried at the same time, and after one part of the water-soluble fertilizer is dried, another part of the water-soluble fertilizer is immediately replaced, so that the situation that part of the water-soluble fertilizer is excessively dried when a large amount of the water-soluble fertilizer is placed in the drying device and dried at the same time, and the water-soluble fertilizer is damaged is avoided. The problems that the humidity of the water-soluble fertilizer cannot reach the set humidity and the other part of the water-soluble fertilizer cannot reach the set humidity are solved, a urease inhibitor with a proper concentration can be automatically sprayed into the water-soluble fertilizer according to the concentration content of ammonium nitrogen in the water-soluble fertilizer in the drying process of the water-soluble fertilizer, and the activity of urease in the decomposition process of the water-soluble fertilizer can be inhibited, so that the generation of ammonia gas is reduced, and the yield of the water-soluble fertilizer is improved. The nutrient volatilization loss is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of water-soluble fertilizer drying, and in particular relates to a water-soluble fertilizer drying device. Background Art

[0002] Water-soluble fertilizers usually contain a large amount of elements (such as nitrogen, phosphorus, and potassium), which are basic nutrients necessary for plant growth and development. Among them, nitrogen can promote the growth of plant stems and leaves; phosphorus helps plant root development, flowering and fruiting, etc.; potassium can enhance the plant's resistance to stress and improve fruit quality.

[0003] Water-soluble fertilizers usually contain a certain amount of water during the production process. If they are not dried, during storage and transportation, as the ambient temperature and humidity change, the water may cause the fertilizer particles to stick together and form lumps. Therefore, after the production of water-soluble fertilizers is completed, they need to be dried using a drying device. For example, a water-soluble fertilizer drying device and a drying method thereof are proposed in patent announcement No. CN118293655B.

[0004] During the drying operation of water-soluble fertilizers by existing drying devices, some nitrogen-containing components contained in the water-soluble fertilizers, such as ammonium nitrogen, will volatilize and escape in the form of ammonia gas in a certain amount during the evaporation of water. This will not only cause the nitrogen element in the fertilizer to be lost, but also reduce the fertilizer efficiency, and it is very likely to cause a certain degree of pollution to the surrounding environment; at the same time, after the production of water-soluble fertilizers, due to the differences in the water content of the raw materials themselves and the influence of factors such as uneven mixing of the raw materials, the overall moisture content of the same batch of water-soluble fertilizers is not completely consistent. When a large amount of water-soluble fertilizers are placed in a device with the same drying function for drying, some of the water-soluble fertilizers will be over-dried, while other parts of the water-soluble fertilizers will fail to reach the set humidity.

[0005] Therefore, a water-soluble fertilizer drying device is proposed to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a water-soluble fertilizer drying device in view of the above problems.

[0007] To achieve the above object, the present invention adopts the following technical scheme: a water-soluble fertilizer drying device, comprising a drying box and a mounting plate arranged on the inner wall of the drying box, the left side wall of the drying box is fixedly connected with a control box, the control box is provided with a PLC controller, and further comprises: Multiple storage components are evenly distributed in the drying box and are used to place water-soluble fertilizers that need to be dried; The air supply component is arranged on the right outer wall of the drying box and supplies hot air to the storage component for drying the water-soluble fertilizer; The detection component is arranged on the right wall of the drying box and is used for discharging moisture of the water-soluble fertilizer and detecting the ammonia concentration in the moisture; The protection component is arranged on the left wall of the drying box, and the detection component is electrically connected to the protection component through the PLC controller to deliver an appropriate amount of urease inhibitor into the water-soluble fertilizer; The loading and unloading assembly is arranged at the rear of the drying box and is used for loading and unloading water-soluble fertilizers.

[0008] Preferably, the storage assembly includes a storage cylinder and a cover cylinder, the upper and lower ends of the storage cylinder are both open-type designs, the lower end of the cover cylinder is open-type design, the cover cylinder is plugged into the mounting plate, the side wall of the mounting plate is fixedly connected with a first electric push rod, the moving end of the first electric push rod passes through the mounting plate and is fixedly connected with a fixing ring, the inner wall of the fixing ring is fixedly connected with an air supply hood, the storage cylinder and the inner wall of the air supply hood are fixedly connected, and the storage cylinder is located directly below the cover cylinder, the side wall of the storage cylinder is provided with a plurality of air outlet holes inclined downward, the left and right sides of the storage cylinder are rotatably connected with connecting shafts, the opposite ends of the two connecting shafts are located in the storage cylinder, and are fixedly connected with the same storage plate, A weighing assembly is provided on the upper side wall of the storage plate, a control motor is fixedly connected to the right side wall of the storage cylinder, and the output end of the control motor is connected to the connecting shaft on the right side, the weighing assembly is electrically connected to the PLC controller, the upper side walls of the plurality of cover cylinders are rotatably connected to stirring rods, the rod walls of the stirring rods are fixedly connected to a plurality of stirring plates, the side walls of the two stirring plates on the lower side are fixedly connected to a plurality of humidity sensors, the humidity sensors are electrically connected to the PLC controller, the upper side wall of the cover cylinder on the right side is fixedly connected to a stirring motor, the stirring motor is transmission-connected to the rightmost stirring rod through a pulley transmission assembly, and two adjacent stirring rods are transmission-connected through a pulley transmission assembly.

[0009] Preferably, the air supply assembly includes a heating box fixedly connected to the right side wall of the drying box, a plurality of heating wires are fixedly connected to the inner wall of the heating box, an air inlet is opened on the right side wall of the heating box, an upper side wall of the heating box is fixedly connected to an air supply pump, the air inlet end of the air supply pump is connected to the heating box, the air outlet end of the air supply pump is fixedly connected to an air supply pipe, the upper end of the air supply pipe passes through the drying box and is placed horizontally in the drying box, the lower side wall of the air supply pipe located in the drying box is fixedly connected to a plurality of vertical pipes, a control valve is provided in the vertical pipe, the lower end of the vertical pipe passes through a mounting plate and is fixedly connected to an insert, and the upper side wall of the air supply hood is fixedly connected to an insert matching the insert.

[0010] Preferably, the detection component includes a filtering mechanism and an air pump, the filtering mechanism is fixedly connected to the right side wall of the drying box, the air inlet end of the air pump is connected to the lower side wall of the filtering mechanism, the left side of the filtering mechanism is connected with a transverse pipe, the lower end of the transverse pipe is connected with an exhaust pipe, the lower end of the exhaust pipe is connected with the upper side wall of the cover tube, the right side wall of the drying box is fixedly connected with a detection box, the air outlet end of the air pump is fixedly connected with an air distribution pipe, the lower end of the air distribution pipe is located in the detection box and is connected with a plurality of air outlet heads, the upper side wall of the detection box is fixedly connected with a mounting tube, the upper inner wall of the mounting tube is fixedly connected with a color recognition sensor, the color recognition sensor is electrically connected to a PLC controller, the side wall of the air outlet end of the air pump is connected with a delivery pipe, a first solenoid valve is provided in the air distribution pipe, a second solenoid valve is provided in the delivery pipe, the detection box and the delivery pipe are fixedly connected with the same return air pipe, and a one-way valve is provided in the return air pipe, and Nessler's reagent is placed in the detection box.

[0011] Preferably, the protection component includes a water tank and a water pump, the water tank is fixedly connected to the left side wall of the drying box, the water pump is fixedly connected to the left side wall of the water tank, and the liquid inlet end of the water pump is connected to the water tank, the liquid outlet end of the water pump is fixedly connected to an infusion pipe, the wall of the infusion pipe is fixedly connected to a plurality of discharge pipes, and a regulating valve is provided in the discharge pipe, a discharge groove is provided at the upper end of the stirring rod, the lower end of the discharge pipe passes through the drying box and is rotatably connected to the discharge groove through a sealed bearing, the left and right sides of the stirring rod are fixedly connected to a spray pipe, and the spray pipe is connected to the discharge groove, and a plurality of spray holes are provided on the lower side wall of the spray pipe.

[0012] Preferably, the loading and unloading assembly includes a plurality of feeding cylinders located at the rear side of the drying box, the number of the feeding cylinders is the same as the number of the storage cylinders, the feeding cylinders are located directly behind the storage cylinders, the rear side wall of the feeding cylinders is connected to the discharge end of the threaded feeder, the front side wall of the feeding cylinder is connected to an inclined feeding pipe, a regulating valve is provided in the feeding pipe, and the front end of the feeding pipe is connected to a loading pipe through a telescopic pipe, the upper side wall of the feeding pipe is fixedly connected to a second electric push rod, the moving end of the second electric push rod is connected to the loading pipe, and the same conveyor belt is placed under the plurality of storage cylinders.

[0013] Preferably, the lower side wall of the storage tube is connected with a guide cover, and the guide cover is made of canvas.

[0014] Preferably, a liquid inlet pipe and a liquid outlet pipe are fixedly connected to the lower side wall of the detection box, a liquid level sensor is fixedly connected to the right inner wall of the detection box, and the liquid level sensor is electrically connected to the PLC controller.

[0015] Compared with the existing technology, the advantages of a water-soluble fertilizer drying device are: 1. By means of the drying box, mounting plate, control box, PLC controller and storage components, when the drying device is used to dry the water-soluble fertilizer, multiple portions of the water-soluble fertilizer can be dried at the same time, and after one portion of the water-soluble fertilizer is dried, it can be immediately replaced with another portion of the water-soluble fertilizer, thereby avoiding the problem that a large amount of water-soluble fertilizer is placed in the drying device for drying at the same time, resulting in some water-soluble fertilizers being over-dried while other portions of the water-soluble fertilizers fail to reach the set humidity.

[0016] 2. Through the detection components and protection components set up, during the drying process of the water-soluble fertilizer, different amounts of urease inhibitors can be automatically delivered to the water-soluble fertilizer according to the concentration of ammonium nitrogen in the water-soluble fertilizer, which can inhibit the activity of urease during the decomposition of the water-soluble fertilizer, thereby reducing the production of ammonia and reducing nutrient volatilization losses.

[0017] 3. Through the setting of loading and unloading components, after part of the water-soluble fertilizer inside the drying device is dried, the dried water-soluble fertilizer can be automatically transported to the storage location for storage. At the same time, an appropriate amount of untreated water-soluble fertilizer can be automatically placed in the drying device for drying. No manual loading is required, which reduces the workload of operators. At the same time, the loading and unloading efficiency of the water-soluble fertilizer is high, which reduces the loss of heat inside the drying device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a water-soluble fertilizer drying device provided by the present invention; Figure 2 It is a three-dimensional structural schematic diagram of a drying box in a water-soluble fertilizer drying device provided by the present invention; Figure 3 It is a left view of a drying box in a water-soluble fertilizer drying device provided by the present invention; Figure 4 It is a schematic diagram of the internal structure of a detection box in a water-soluble fertilizer drying device provided by the present invention; Figure 5 It is a schematic diagram of the partial internal structure of a drying box in a water-soluble fertilizer drying device provided by the present invention; Figure 6 It is a structural schematic diagram of a storage component in a water-soluble fertilizer drying device provided by the present invention; Figure 7 It is a schematic diagram of the connection relationship between a stirring rod and a liquid spraying pipe in a water-soluble fertilizer drying device provided by the present invention; Figure 8 The present invention provides a schematic diagram of the positional relationship between a stirring plate and a humidity sensor in a water-soluble fertilizer drying device.

[0019] In the figure: 1 drying box, 2 mounting plate, 3 control box, 4 PLC controller, 5 storage assembly, 501 storage cylinder, 502 cover cylinder, 6 first electric push rod, 7 fixing ring, 8 air supply cover, 9 air outlet, 10 connecting shaft, 11 storage plate, 12 weighing assembly, 13 stirring rod, 14 stirring plate, 15 humidity sensor, 16 stirring motor, 17 air supply assembly, 171 heating box, 172 heating wire, 18 air supply pump, 19 air supply pipe, 20 liquid level sensor, 21 vertical pipe, 22 control valve, 23 insert cylinder, 24 insert pipe, 25 detection assembly, 251 filtering mechanism, 252 vacuum pump, 26 Horizontal pipe, 27 exhaust pipe, 28 detection box, 29 air distribution pipe, 30 air outlet head, 31 installation tube, 32 color recognition sensor, 33 delivery pipe, 34 first solenoid valve, 35 second solenoid valve, 36 return air pipe, 37 one-way valve, 38 protection component, 381 water tank, 382 water pump, 39 infusion pipe, 40 discharge pipe, 41 regulating valve, 42 liquid outlet pipe, 43 liquid spray pipe, 44 liquid spray hole, 45 loading and unloading components, 451 feeding barrel, 452 feeding pipe, 46 feeding pipe, 47 second electric push rod, 48 conveyor belt, 49 guide cover, 50 liquid inlet pipe, 51 control motor, 52 regulating valve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] like Figure 1-Figure 8 As shown, a water-soluble fertilizer drying device includes a drying box 1 and a mounting plate 2 arranged on the inner wall of the drying box 1. The left wall of the drying box 1 is fixedly connected to a control box 3, and a PLC controller 4 is arranged in the control box 3. The device also includes: A plurality of storage components 5 are evenly distributed in the drying box 1 for placing water-soluble fertilizers to be dried. The storage components 5 include a storage cylinder 501 and a cover cylinder 502. The storage cylinder 501 has an open design at both ends, and the cover cylinder 502 has an open design at the lower end. The cover cylinder 502 is plugged into the mounting plate 2. The side wall of the mounting plate 2 is fixedly connected with a first electric push rod 6. The moving end of the first electric push rod 6 passes through the mounting plate 2 and is fixedly connected with a fixing ring 7. The inner wall of the fixing ring 7 is fixedly connected with an air supply hood 8. The storage cylinder 501 and the air supply hood 8 are fixedly connected. The inner wall of the gas hood 8 is fixedly connected, and the storage cylinder 501 is located directly below the cover cylinder 502. The side wall of the storage cylinder 501 is provided with a plurality of downwardly inclined air outlet holes 9. The left and right sides of the storage cylinder 501 are rotatably connected with connecting shafts 10. The opposite ends of the two connecting shafts 10 are both located in the storage cylinder 501 and are fixedly connected with the same storage plate 11. The upper side wall of the storage plate 11 is provided with a weighing assembly 12 (the weighing assembly 12 is composed of a plate and a weight sensor). The right side wall of the storage cylinder 501 is fixedly connected with a control electric The machine 51 is provided with a control unit 502, and the output end of the control motor 51 is connected to the connecting shaft 10 on the right side, the weighing assembly 12 is electrically connected to the PLC controller 4, the upper side walls of the plurality of cover barrels 502 are rotatably connected with stirring rods 13, the rod wall of the stirring rod 13 is fixedly connected with a plurality of stirring plates 14, the side walls of the two stirring plates 14 on the lower side are fixedly connected with a plurality of humidity sensors 15, the humidity sensor 15 is electrically connected to the PLC controller 4, the upper side wall of the right cover barrel 502 is fixedly connected with a stirring motor 16, the stirring motor 16 is transmission-connected to the rightmost stirring rod 13 through a pulley transmission assembly, and the two adjacent stirring rods 13 are transmission-connected through a pulley transmission assembly. When the water-soluble fertilizer is dried by the drying device, multiple portions of the water-soluble fertilizer can be dried at the same time, and after the drying of one portion of the water-soluble fertilizer is completed, another portion of the water-soluble fertilizer is immediately replaced, thereby avoiding the problem that a large amount of water-soluble fertilizer is placed in the drying device for drying at the same time, and some of the water-soluble fertilizers are over-dried, while other portions of the water-soluble fertilizers fail to reach the set humidity; The air supply component 17 is arranged on the right outer wall of the drying box 1 to deliver hot air to the storage component 5 for drying the water-soluble fertilizer. The air supply component 17 includes a heating box 171 fixedly connected to the right wall of the drying box 1. The inner wall of the heating box 171 is fixedly connected to a plurality of heating wires 172. The right wall of the heating box 171 is provided with an air inlet. The upper side wall of the heating box 171 is fixedly connected to an air supply pump 18. The air inlet end of the air supply pump 18 is connected to the heating box 171. The air supply pump 18 is connected to the heating box 171. The air outlet end of 18 is fixedly connected with an air supply pipe 19, the upper end of the air supply pipe 19 passes through the drying box 1 and is placed horizontally in the drying box 1. The air supply pipe 19 is located at the lower side wall in the drying box 1 and is fixedly connected with a plurality of vertical pipes 21. A control valve 22 is arranged in the vertical pipe 21. The lower end of the vertical pipe 21 passes through the mounting plate 2 and is fixedly connected with an insert 23. The upper side wall of the air supply hood 8 is fixedly connected with an insert 24 that matches the insert 23, which can deliver hot air to the storage assembly 5. The detection component 25 is arranged on the right side wall of the drying box 1, and is used for discharging moisture of the water-soluble fertilizer and detecting the ammonia concentration in the moisture. The detection component 25 includes a filtering mechanism 251 and an air pump 252. The filtering mechanism 251 is fixedly connected to the right side wall of the drying box 1. The air inlet end of the air pump 252 is connected to the lower side wall of the filtering mechanism 251. The left side of the filtering mechanism 251 is connected to a transverse pipe 26. The lower end of the transverse pipe 26 is connected to an exhaust pipe 27. The lower end of the exhaust pipe 27 is connected to the upper side wall of the cover tube 502. The right side wall of the drying box 1 is fixedly connected to a detection box 28. The air outlet end of the air pump 252 is fixedly connected to an air distribution pipe 29. The lower end of the air distribution pipe 29 Located in the detection box 28, and connected with multiple air outlet heads 30, the upper side wall of the detection box 28 is fixedly connected with a mounting tube 31, the upper inner wall of the mounting tube 31 is fixedly connected with a color recognition sensor 32, the color recognition sensor 32 is electrically connected to the PLC controller 4, the side wall of the air outlet end of the vacuum pump 252 is connected with a delivery pipe 33, a first solenoid valve 34 is provided in the air distribution pipe 29, a second solenoid valve 35 is provided in the delivery pipe 33, the detection box 28 and the delivery pipe 33 are fixedly connected with the same return air pipe 36, and a one-way valve 37 is provided in the return air pipe 36, and Nessler's reagent is placed in the detection box 28, which can detect the concentration of ammonium nitrogen in the water-soluble fertilizer; The protection component 38 is arranged on the left side wall of the drying box 1. The detection component 25 is electrically connected to the protection component 38 through the PLC controller 4 to deliver an appropriate amount of urease inhibitor to the water-soluble fertilizer. The protection component 38 includes a water tank 381 and a water pump 382. The water tank 381 is fixedly connected to the left side wall of the drying box 1. The water pump 382 is fixedly connected to the left side wall of the water tank 381. The liquid inlet end of the water pump 382 is connected to the water tank 381. The liquid outlet end of the water pump 382 is fixedly connected to a liquid infusion pipe 39. The wall of the liquid infusion pipe 39 is fixedly connected to multiple discharge pipes 40. The discharge pipe 4 0 is provided with a regulating valve 41, a discharge groove is provided at the upper end of the stirring rod 13, the lower end of the discharge pipe 40 passes through the drying box 1, and is rotatably connected to the discharge groove through a sealed bearing, and the left and right sides of the stirring rod 13 are fixedly connected with a spray pipe 43, and the spray pipe 43 is connected to the discharge groove, and a plurality of spray holes 44 are provided on the lower side wall of the spray pipe 43, which can automatically transport different amounts of urease inhibitors to the water-soluble fertilizer according to the concentration of ammonium nitrogen in the water-soluble fertilizer, and can inhibit the activity of urease in the decomposition process of the water-soluble fertilizer, thereby reducing the generation of ammonia and reducing the loss of nutrients by volatilization; The loading and unloading assembly 45 is arranged at the rear of the drying box 1 and is used for loading and unloading water-soluble fertilizers. The loading and unloading assembly 45 includes a plurality of feeding cylinders 451 located at the rear side of the drying box 1. The number of the feeding cylinders 451 is the same as the number of the storage cylinders 501. The feeding cylinders 451 are located directly behind the storage cylinders 501. The rear side wall of the feeding cylinder 451 is connected to the discharge end of the screw feeder. The front side wall of the feeding cylinder 451 is connected to an inclined feeding pipe 452. A regulating valve 52 is arranged in the feeding pipe 452. The front end of the feeding pipe 452 is connected to the feeding pipe 46 through a telescopic pipe. The feeding pipe 45 2 is fixedly connected to the upper side wall thereof, and the movable end of the second electric push rod 47 is connected to the feeding pipe 46. The same conveyor belt 48 is placed under the plurality of storage cylinders 501. After some of the water-soluble fertilizers in the drying device are dried, the dried water-soluble fertilizers can be automatically transported to the storage location for storage. At the same time, an appropriate amount of untreated water-soluble fertilizers can be automatically placed in the drying device for drying. Manual feeding is not required, which reduces the workload of the operators. At the same time, the feeding and unloading efficiency of the water-soluble fertilizers is high, which reduces the loss of heat inside the drying device.

[0022] The lower side wall of the storage cylinder 501 is connected with a guide cover 49, which is made of canvas and can reduce the generation of water-soluble fertilizer dust during the feeding process.

[0023] The lower side wall of the detection box 28 is fixedly connected with a liquid inlet pipe 50 and a liquid outlet pipe 42, and the right inner wall of the detection box 28 is fixedly connected with a liquid level sensor 20. The liquid level sensor 20 and the PLC controller 4 are electrically connected, so that the Nessler's reagent inside the detection box 28 can be replaced.

[0024] The operating principle of the present invention is now explained as follows: when the water-soluble fertilizer needs to be dried, the operator transmits an electrical signal to the PLC controller 4 through the control box 3. After receiving the electrical signal, the PLC controller 4 first controls the multiple first electric push rods 6 to work, and the multiple first electric push rods 6 will drive the multiple storage cylinders 501 to move downward together, so that the storage cylinders 501 are completely extended out of the drying box 1, and the opening position of the storage cylinders 501 is below the loading tube 46. Then the PLC controller 4 controls the second electric push rod 47 to work, so that the second electric push rod 47 drives the loading tube 46 to move above the storage cylinder 501. Then the PLC controller 4 controls the external multiple screw feeders and multiple regulating valves 52 to work, and the multiple screw The rotary feeder conveys the water-soluble fertilizer to be dried into the feeding barrel 451, and conveys it into the storage barrel 501 through the feeding pipe 452 and the feeding pipe 46, so that the water-soluble fertilizer falls onto the surface of the weighing component 12 on the storage plate 11. When the weighing component 12 detects that the water-soluble fertilizer above has reached the set weight, the weighing component 12 stops working through the PLC controller 4 and the spiral feeder, and controls the regulating valve 52 to close. Then the PLC controller 4 controls the second electric push rod 47 to drive the feeding pipe 46 to move out of the storage barrel 501, and then the PLC controller 4 controls the multiple first electric push rods 6 to drive the multiple storage barrels 501 to move upward to the initial position again. Then the PLC controller 4 controls the heating wire 172, the air pump 18 and the stirring motor 16 to work simultaneously. The air delivery pump 18 delivers the hot air heated by the heating wire 172 to the air delivery hood 8 through the air delivery pipe 19, the vertical pipe 21, the insert tube 23 and the insert tube 24 (at this time, the control valve 22 inside the vertical pipe 21 is in an open state), and blows the hot air to the water-soluble fertilizer in the storage tube 501 through the multiple air outlet holes 9, and uses the hot air to dry the water-soluble fertilizer. At the same time, the stirring motor 16 drives the multiple stirring rods 13 to rotate through the pulley transmission assembly, and the stirring rods 13 drive the stirring plate 14 to rotate, and the stirring plate 14 is used to stir the water-soluble fertilizer in the storage tube 501, so that the water-soluble fertilizer in the storage tube 501 is evenly heated and dried. At the same time, the PLC controller 4 also controls the air extraction pump 252 to work, and the air extraction pump 252 is connected to the waste pipe 26 through the horizontal pipe 26. The air pipe 27 extracts the waste gas generated when the water-soluble fertilizer in the storage tube 501 is heated, and the waste gas will be filtered by the filtering mechanism 251 to prevent the particulate matter in the waste gas from being discharged. The waste gas will be transported to the external cleaning equipment (such as activated carbon adsorption equipment, etc.) through the delivery pipe 33 by the air pump 252 for purification. When the water-soluble fertilizer is heated for ten seconds, the PLC controller 4 will control the second solenoid valve 35 to close and the first solenoid valve 34 to open for five seconds, so that the waste gas is transported to the Nessler's reagent in the detection box 28 through the air distribution pipe 29. During the heating and drying process of the water-soluble fertilizer, the ammonium nitrogen in the water-soluble fertilizer will volatilize in the form of ammonia. The gas containing ammonia will be transported to the Nessler's reagent by the air pump 252, and the ammonia and Nessler's reagent will be mixed. The reagent (alkaline solution of mercuric iodide and potassium iodide) reacts to form a light reddish brown complex, the color depth of which is proportional to the concentration of ammonia. Then the PLC controller 4 uses the color recognition sensor 32 to detect the color of the complex. When the color of the complex is detected to be darker, the water pump 382 will be controlled to work for a longer time. When the color of the complex is detected to be lighter, the water pump 382 will be controlled to work for a shorter time, so as to transport different amounts of urease inhibitor into the water-soluble fertilizer (by controlling the different working times of the water pump 382, ​​different amounts of urease inhibitor can be transported into the storage cylinder 501, so that the concentration of urease inhibitor in the storage cylinder 501 is different. In addition, the color recognition sensor 32 is electrically connected to the PLC controller 4, and the PLC controller 4 is electrically connected to the color recognition sensor 32. The controller 4 is programmed to read the data fed back by the color recognition sensor 32, judge the color depth according to the data, and set the water pump 382 to work for different times through logic settings), and for the same batch of water-soluble fertilizers with the same ammonium nitrogen concentration, only one test is required (the volatilization amount of ammonia in the water-soluble fertilizer is mainly related to the formula and composition of the water-soluble fertilizer. For example, a water-soluble fertilizer with a higher concentration of ammonium carbonate is easier to decompose ammonia than a water-soluble fertilizer with a higher concentration of ammonium chloride. Although the overall moisture content of the same batch of water-soluble fertilizers is not completely consistent, during the drying process, due to the inhibitory effect of the urease inhibitor, even if the amount of ammonium ammonia in the water-soluble fertilizer volatilized in the form of ammonia is different, it can effectively reduce the generation of ammonia and reduce nutrient volatilization losses); When the PLC controller 4 controls the water pump 382 to work, the water pump 382 will transport the liquid urease inhibitor in the water tank 381 to the discharge tank at the upper end of the stirring rod 13 through the liquid infusion pipe 39 and the discharge pipe 40, and spray it to the water-soluble fertilizer being dried below through the liquid spray pipe 43 and the liquid spray hole 44. The urease inhibitor can inhibit the activity of urease in the decomposition process of the water-soluble fertilizer, thereby reducing the generation of ammonia and the loss of nutrients due to volatilization. In addition, since the amount of urease inhibitor sprayed is small, it will not affect the drying of the water-soluble fertilizer. When the water pump 382 works for the set time, the PLC controller 4 will control the water pump 382 to stop working and control all the regulating valves 41 to close; When the stirring rod 13 drives the stirring plate 14 and the humidity sensor 15 to stir the water-soluble fertilizer, when the humidity sensor 15 detects that the internal humidity of the water-soluble fertilizer is dry to the set threshold value (the moisture content is controlled at about 2%-5%, which can greatly reduce the risk of caking caused by moisture and ensure that the physical properties of the water-soluble fertilizer are good during storage and transportation and subsequent use), the humidity sensor 15 at this location will control the corresponding control valve 22 to close through the PLC controller 4, so that the hot air no longer enters the storage cylinder 501, and then the PLC controller 4 controls the corresponding first electric push rod 6 to work, so that the first electric push rod 6 drives the storage cylinder 501 to move downward to a position closer to the conveyor belt 48, and then the PLC controller 4 controls the corresponding control motor 51 to drive the storage plate 11 to rotate ninety degrees, so that the dried water-soluble fertilizer on the storage plate 11 falls onto the conveyor belt 48 through the guide cover 49, and the dried water-soluble fertilizer is transported to the storage area by the conveyor belt 48 for storage, and then the PLC controller 4 controls the corresponding control motor 51 to drive the storage plate 11 to rotate ninety degrees, so that the dried water-soluble fertilizer on the storage plate 11 falls onto the conveyor belt 48 through the guide cover 49, and the dried water-soluble fertilizer is transported to the storage area by the conveyor belt 48 for storage. The C controller 4 drives the storage plate 11 to be placed horizontally by controlling the motor 51, and then the PLC controller 4 controls the second electric push rod 47 at the corresponding position to work. Since the storage cylinder 501 is located below the feeding tube 46 at this time, the second electric push rod 47 can drive the feeding tube 46 to move into the storage cylinder 501, and then the PLC controller 4 controls the corresponding external screw feeder to work, and controls the corresponding regulating valve 52 to open, so as to transport the water-soluble fertilizer to be dried into the storage cylinder 501. The weight of the water-soluble fertilizer can be detected by the weighing component 12. When the weight of the water-soluble fertilizer above the weighing component 12 reaches the set weight, the above steps will be repeated, and the storage cylinder 501 drives the water-soluble fertilizer to move upward to the initial position to continue the drying step. At the same time, the PLC controller 4 will also control the water pump 382 and the corresponding regulating valve 41 to work until the set time (to ensure that the spraying amount of urease inhibitor in a single storage cylinder 501 is the same), and spray an appropriate amount of urease inhibitor in the water tank 381 into the water-soluble fertilizer.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A water-soluble fertilizer drying device, comprising a drying box (1) and a mounting plate (2) arranged on the inner wall of the drying box (1), a control box (3) being fixedly connected to the left side wall of the drying box (1), a PLC controller (4) being arranged in the control box (3), characterized in that: Also includes: A plurality of storage components (5) are evenly distributed in the drying box (1) and are used to store water-soluble fertilizers that need to be dried; An air supply component (17) is arranged on the right outer wall of the drying box (1) and supplies hot air to the storage component (5) for drying the water-soluble fertilizer; A detection component (25) is arranged on the right side wall of the drying box (1) and is used to discharge moisture from the water-soluble fertilizer and detect the ammonia concentration in the moisture; The protection component (38) is arranged on the left side wall of the drying box (1), and the detection component (25) is electrically connected to the protection component (38) via the PLC controller (4) to deliver an appropriate concentration of urease inhibitor into the water-soluble fertilizer; The loading and unloading assembly (45) is arranged at the rear of the drying box (1) and is used for loading and unloading the water-soluble fertilizer.

2. A water-soluble fertilizer drying device according to claim 1, characterized in that: The storage assembly (5) comprises a storage cylinder (501) and a cover cylinder (502). The storage cylinder (501) has an open design at both the upper and lower ends. The cover cylinder (502) has an open design at the lower end. The cover cylinder (502) is plugged into a mounting plate (2). A first electric push rod (6) is fixedly connected to the side wall of the mounting plate (2). The moving end of the first electric push rod (6) passes through the mounting plate (2) and is fixedly connected to a fixing ring (7). The inner portion of the fixing ring (7) is The storage cylinder (501) is fixedly connected to the inner wall of the air supply hood (8), the storage cylinder (501) is fixedly connected to the inner wall of the air supply hood (8), and the storage cylinder (501) is located directly below the hood cylinder (502). The side wall of the storage cylinder (501) is provided with a plurality of air outlet holes (9) inclined downwardly. The left and right sides of the storage cylinder (501) are rotatably connected to connecting shafts (10), and the opposite ends of the two connecting shafts (10) are located in the storage cylinder (501) and are fixedly connected to the same storage plate. (11), a weighing assembly (12) is provided on the upper side wall of the storage plate (11), a control motor (51) is fixedly connected to the right side wall of the storage cylinder (501), and the output end of the control motor (51) is connected to the right connecting shaft (10), the weighing assembly (12) is electrically connected to the PLC controller (4), the upper side walls of the plurality of cover cylinders (502) are rotatably connected to stirring rods (13), the rod walls of the stirring rods (13) are fixedly connected to a plurality of stirring plates (14), the side walls of the two stirring plates (14) located at the lower side are fixedly connected to a plurality of humidity sensors (15), the humidity sensors (15) are electrically connected to the PLC controller (4), the upper side wall of the cover cylinder (502) located at the right side is fixedly connected to a stirring motor (16), the stirring motor (16) is transmission-connected to the rightmost stirring rod (13) through a pulley transmission assembly, and two adjacent stirring rods (13) are transmission-connected through a pulley transmission assembly.

3. A water-soluble fertilizer drying device according to claim 2, characterized in that: The air supply assembly (17) comprises a heating box (171) fixedly connected to the right side wall of the drying box (1), a plurality of heating wires (172) are fixedly connected to the inner wall of the heating box (171), an air inlet is provided on the right side wall of the heating box (171), an upper side wall of the heating box (171) is fixedly connected to an air supply pump (18), an air inlet end of the air supply pump (18) is connected to the heating box (171), and an air outlet end of the air supply pump (18) is fixedly connected to an air supply pipe (1 9), the upper end of the air supply pipe (19) passes through the drying box (1) and is placed horizontally in the drying box (1); the lower side wall of the air supply pipe (19) located in the drying box (1) is fixedly connected to a plurality of vertical pipes (21); a control valve (22) is provided in the vertical pipe (21); the lower end of the vertical pipe (21) passes through the mounting plate (2) and is fixedly connected to an insert tube (23); the upper side wall of the air supply hood (8) is fixedly connected to an insert tube (24) that matches the insert tube (23).

4. A water-soluble fertilizer drying device according to claim 1, characterized in that: The detection assembly (25) comprises a filtering mechanism (251) and an air pump (252); the filtering mechanism (251) is fixedly connected to the right side wall of the drying box (1); the air inlet end of the air pump (252) is in communication with the lower side wall of the filtering mechanism (251); the left side of the filtering mechanism (251) is in communication with a transverse pipe (26); the lower end of the transverse pipe (26) is in communication with an exhaust pipe (27); the lower end of the exhaust pipe (27) is in communication with the upper side wall of the cover tube (502); the right side wall of the drying box (1) is fixedly connected to a detection box (28); the air outlet end of the air pump (252) is fixedly connected to an air distribution pipe (29); the lower end of the air distribution pipe (29) is located in the detection box (28) and is in communication with the upper side wall of the cover tube (502); There are a plurality of air outlet heads (30); the upper side wall of the detection box (28) is fixedly connected to a mounting tube (31); the upper inner wall of the mounting tube (31) is fixedly connected to a color recognition sensor (32); the color recognition sensor (32) is electrically connected to a PLC controller (4); the side wall of the air outlet end of the vacuum pump (252) is connected to a delivery pipe (33); a first electromagnetic valve (34) is provided in the air distribution pipe (29); a second electromagnetic valve (35) is provided in the delivery pipe (33); the detection box (28) and the delivery pipe (33) are fixedly connected to a same return air pipe (36); a one-way valve (37) is provided in the return air pipe (36); and Nessler's reagent is placed in the detection box (28).

5. A water-soluble fertilizer drying device according to claim 2, characterized in that: The protection assembly (38) comprises a water tank (381) and a water pump (382); the water tank (381) is fixedly connected to the left side wall of the drying box (1); the water pump (382) is fixedly connected to the left side wall of the water tank (381); the liquid inlet end of the water pump (382) is connected to the water tank (381); the liquid outlet end of the water pump (382) is fixedly connected to a liquid infusion pipe (39); the wall of the liquid infusion pipe (39) is fixedly connected to a plurality of discharge pipes (40); and a regulating valve (41) is provided in the discharge pipe (40); a discharge groove is provided at the upper end of the stirring rod (13); the lower end of the discharge pipe (40) passes through the drying box (1) and is rotatably connected to the discharge groove via a sealing bearing; a liquid spray pipe (43) is fixedly connected to the left and right sides of the stirring rod (13); the liquid spray pipe (43) is connected to the discharge groove; and a plurality of liquid spray holes (44) are provided in the lower wall of the liquid spray pipe (43).

6. A water-soluble fertilizer drying device according to claim 1, characterized in that: The loading and unloading assembly (45) comprises a plurality of feeding cylinders (451) located at the rear side of the drying box (1). The number of the feeding cylinders (451) is the same as the number of the storage cylinders (501). The feeding cylinders (451) are located directly behind the storage cylinders (501). The rear side wall of the feeding cylinder (451) is connected to the discharge end of the screw feeder. The front side wall of the feeding cylinder (451) is connected to an inclined feeding pipe (452). A regulating valve (52) is provided in the feeding pipe (452). The front end of the feeding pipe (452) is connected to a loading pipe (46) via a telescopic pipe. The upper side wall of the feeding pipe (452) is fixedly connected to a second electric push rod (47). The movable end of the second electric push rod (47) is connected to the loading pipe (46). The same conveyor belt (48) is placed below the plurality of storage cylinders (501).

7. A water-soluble fertilizer drying device according to claim 2, characterized in that: The lower side wall of the storage cylinder (501) is connected to a guide cover (49), and the guide cover (49) is made of canvas.

8. A water-soluble fertilizer drying device according to claim 4, characterized in that: The lower side wall of the detection box (28) is fixedly connected to a liquid inlet pipe (50) and a liquid outlet pipe (42), the right inner wall of the detection box (28) is fixedly connected to a liquid level sensor (20), and the liquid level sensor (20) is electrically connected to a PLC controller (4).

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