Heat comprehensive utilization equipment and method for sulfur-based compound fertilizer production

Abstract

The invention belongs to the technical field of compound fertilizer heat utilization, and discloses a heat comprehensive utilization device for sulfur-based compound fertilizer production, the heat comprehensive utilization device comprises a base, and a drying box and a heat supply box are fixedly mounted at the top of the base. An extrusion bin is arranged at the top of the drying box, an exhaust port is formed in the bottom of the extrusion bin, meanwhile, three sliding plates are hinged to the interior of the drying box, the bottom end of the top sliding plate is connected to the bottom of the extrusion bin through a second tension spring, and a pair of first tension springs is elastically connected between the bottom ends of the adjacent sliding plates; hot air in the drying box is pumped out and conveyed into the extrusion bin through the pressurizing device, the hot air is directly blown to the impeller in the extrusion bin, so that the impeller is pushed to rotate, and then hot air flow is conveyed into the air return pipe through the exhaust port through the impeller; hot air flow is intermittently blown to the bottom end of the top sliding plate through an air return nozzle at the bottom of the air return pipe, so that the sliding plate is continuously shaken, and compound fertilizer particles are prevented from being bonded on the surface of the sliding plate.

Description

Technical Field

[0001] The invention belongs to the technical field of heat utilization of compound fertilizers, and in particular relates to a device and a method for comprehensive utilization of heat in the production of sulfur-based compound fertilizers. Background Art

[0002] Sulfur-based compound fertilizer refers to a compound fertilizer made from potassium sulfate or potassium chloride without chloride ions, and the chloride ion content cannot exceed 3%. Its characteristics generally include high concentration, complete nutrients, low chloride content, pollution-free, high fertilizer efficiency, and wide application. The production of sulfur-based compound fertilizer includes the following steps: first, raw material batching, raw material mixing, raw material granulation, and granule drying. Then, it needs to go through granule cooling, granule grading, finished product coating, and finally finished product packaging. Among them, raw material granulation and granule drying require the use of granulation dryer, which involves the comprehensive utilization of heat in compound fertilizer production and its method.

[0003] The invention with publication number CN114963734A relates to the technical field of fertilizer production, and in particular to a machine for conveying and drying compound fertilizer after granulation, comprising a bracket, a drying unit and a conveying unit; the invention uses an air pump to spray the heated air flow onto the compound fertilizer, thereby heating and drying the compound fertilizer, and the buffer plate can be used to divide the compound fertilizer into multiple layers, thereby enhancing the drying effect of the compound fertilizer; the invention can distinguish complete compound fertilizer from broken compound fertilizer through a first combing plate and a second combing plate, thereby ensuring the use effect of the compound fertilizer.

[0004] The compound fertilizer granulating, conveying and drying machine proposed in the above invention has the following problem: when drying the compound fertilizer, after the compound fertilizer is put into the dryer, the buffer plate inside the dryer will layer the compound fertilizer, but after the compound fertilizer is accumulated on the buffer plate, since the compound fertilizer contains a certain amount of water and is relatively moist, the compound fertilizer is accumulated together on the buffer plate, which can easily cause the compound fertilizers to stick together, resulting in quality problems in the produced compound fertilizers. Summary of the invention

[0005] In order to solve the problems raised in the above-mentioned background technology, the present invention provides a comprehensive heat utilization device for the production of sulfur-based compound fertilizer, in which the hot air flow is intermittently blown to the bottom end of the top slide plate through the return air nozzle at the bottom of the return air pipe, so that the slide plate is constantly shaking, and at the same time, the air holes on the slide plate can facilitate the passage of hot air, so that the compound fertilizer particles can roll on the slide plate, thereby preventing the compound fertilizer particles from sticking together.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a heat comprehensive utilization device for the production of sulfur-based compound fertilizer, comprising a base, a drying box and a heating box are fixedly installed on the top of the base, three slides are movably hinged in the inner cavity of the drying box, and the three slides are tiltedly arranged inside the drying box, the top of the drying box is fixedly connected to an extrusion bin, an impeller is movably installed inside the extrusion bin, an exhaust port is opened at the bottom of the extrusion bin, a return air pipe is fixedly connected to the bottom of the exhaust port, and return air nozzles are fixedly installed equidistantly on the inner side of the return air pipe, The side of the extrusion bin is fixedly connected with an air inlet pipe, and the air inlet pipe faces the impeller of the impeller. Both sides of the bottom end of the top slide are fixedly connected with second tension springs, and the top end of the second tension spring is fixedly connected to the bottom of the extrusion bin. A pair of first tension springs are fixedly connected between the bottom ends of two adjacent slides. A heating pipe is fixedly installed at the bottom of the inner cavity of the drying box, and the heating pipe is fixedly connected to the heating box. A pressurizing device is fixedly installed on the top of the heating box, and the air inlet end and the exhaust end of the pressurizing device are fixedly connected to the drying box and the air inlet pipe through the exhaust pipe and the air supply pipe respectively.

[0007] In the above technical solution, preferably, the top of the extrusion bin is fixedly connected to a stirring tank, an auger is movably installed inside the stirring tank, a chassis is fixedly installed on the top of the stirring tank, and a first gear and a second gear are movably installed inside the chassis.

[0008] In the above technical solution, preferably, the first gear is fixedly connected to the top of the auger, a motor is fixedly installed on the side of the mixing tank, the second gear is fixedly connected to the output shaft of the motor, and a chain is transmission-connected between the first gear and the second gear.

[0009] In the above technical solution, preferably, a push plate is fixedly installed at the bottom of the auger, an extrusion base is fixedly installed at the bottom of the mixing tank, and an extrusion port is opened on the extrusion base.

[0010] In the above technical solution, preferably, a cutting base is fixedly mounted on the top of the impeller, a cutting opening is opened on the cutting base, the cutting base is sleeved on the bottom of the extrusion base, and the cutting opening corresponds to the extrusion opening.

[0011] In the above technical solution, preferably, the bottom of the pushing plate is in a truncated cone shape, the extruding base and the cutting base are both in a truncated cone shape, and the pushing plate is movably sleeved inside the extruding base and fits against the inner wall of the extruding base.

[0012] In the above technical solution, preferably, a feeding port is fixedly installed on the top of the mixing tank, and the feeding port is located on the side of the auger.

[0013] In the above technical solution, preferably, a side of the drying box is fixedly connected to a discharge port, and a control valve is fixedly installed on the side of the discharge port.

[0014] In the above technical solution, preferably, the surfaces of the three slides are provided with air holes, the bottom end of the upper slide faces the top of the adjacent slide, and the return air nozzles fixedly connected at the bottom of the return air pipe face the bottom end of the topmost slide.

[0015] This scheme also proposes a method for comprehensive utilization of heat in the production of sulfur-based compound fertilizers, the method is as follows:

[0016] S1. Putting the raw materials of the sulfur-based compound fertilizer into a stirring device for stirring;

[0017] S2, the liquid compound fertilizer after mixing is squeezed out through the squeezing bin, and cut into balls through the cutting device;

[0018] S3, the cut spherical compound fertilizer enters the drying box and falls onto the surface of the slide. Under the influence of the heat flow of the heating pipe at the bottom, the speed at which the compound fertilizer falls onto the slide is slowed down;

[0019] S4. The heat inside the drying box is extracted through the pressurizing device, and the hot air is sent back again through the reflux pipe to directly impact the bottom end of the slide plate, causing the slide plate to vibrate, thereby preventing the compound fertilizer from sticking to the slide plate and preventing the compound fertilizer particles from sticking to each other.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention provides an extrusion bin at the top of the drying box, an exhaust port at the bottom of the extrusion bin, and hinges three slide plates inside the drying box. The bottom end of the top slide plate is fixedly connected to the bottom of the extrusion bin by a second tension spring, and a pair of first tension springs are elastically connected between the bottom ends of adjacent slide plates. The hot air inside the drying box is extracted by a pressurizing device and then transported to the inside of the extrusion bin, so that the hot air is directly blown to the impeller inside the extrusion bin, thereby driving the impeller to rotate, and then the hot air flow is sent to the return air pipe through the exhaust port by the impeller, and the hot air flow is intermittently blown to the bottom end of the top slide plate through the return air nozzle at the bottom of the return air pipe, so that the slide plate is constantly shaken, and at the same time, the air holes on the slide plate are used to facilitate the hot air flow to pass through, so that the compound fertilizer particles roll on the slide plate, and the compound fertilizer particles are prevented from sticking.

[0022] A cutting base is arranged in the middle of the impeller in the extrusion bin, and a cutting opening is provided on the cutting base. An extrusion base is fixedly installed at the bottom of the mixing tank, and an extrusion opening is provided on the extrusion base, so that the extrusion opening and the cutting opening correspond to each other. When a hot air flow is delivered to the inside of the extrusion bin through a pressurizing device, the impeller is rotated, thereby pulling the cutting base to rotate synchronously, and the compound fertilizer particles extruded from the extrusion base are cut off through the cutting opening on the cutting base, and the hot air flow in the impeller is delivered to the return air pipe through the exhaust port, and then the hot air flow is blown to the slide plate through the return air nozzle on the return air pipe. While the slide plate is shaken, the cutting base can cut the compound fertilizer particles extruded from the extrusion base.

[0023] A dragon is arranged in the middle of the mixing tank, a first gear is arranged on the top of the dragon, and the first gear and the dragon are driven to rotate by the second gear on the motor output shaft. The pushing plate at the bottom of the dragon will extrude the liquid compound fertilizer inside the extrusion base at the bottom of the mixing tank from the extrusion port. When the cutting base rotates, the extruded granular compound fertilizer will be cut off. The bottom of the pushing plate is arranged in an inclined shape, so that the pushing plate rotates along the inclined side, thereby squeezing out the liquid compound fertilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a partial cross-sectional view of the present invention;

[0026] Figure 3 For the present invention Figure 2 A magnified schematic diagram of point A;

[0027] Figure 4 It is a side sectional view of the present invention;

[0028] Figure 5 This is a schematic diagram of the internal structure of the drying box of the present invention;

[0029] Figure 6 This is a schematic diagram of the internal structure of the stirring tank of the present invention;

[0030] Figure 7 This is a schematic diagram of the internal decomposition of the stirring tank of the present invention;

[0031] Figure 8 It is a partial disassembly schematic diagram of the present invention.

[0032] In the figure: 1. base; 2. drying box; 3. heating box; 4. pressurizing device; 5. extrusion chamber; 501. impeller; 502. cutting base; 503. cutting port; 6. mixing tank; 7. feeding port; 8. chassis; 9. motor; 10. discharge port; 11. control valve; 12. air supply pipe; 13. exhaust pipe; 14. slide plate; 15. first tension spring; 16. second tension spring; 17. return air pipe; 18. return air nozzle; 19. exhaust port; 20. dragon; 21. push plate; 22. heating pipe; 23. first gear; 24. second gear; 25. air inlet pipe; 26. extrusion base; 261. extrusion port. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0034] like Figures 1 to 8As shown, the present invention provides a heat comprehensive utilization device for the production of sulfur-based compound fertilizers, comprising a base 1, a drying box 2 and a heating box 3 are fixedly installed on the top of the base 1, three slide plates 14 are movably hinged in the inner cavity of the drying box 2, and the three slide plates 14 are tiltedly arranged inside the drying box 2, an extrusion bin 5 is fixedly connected to the top of the drying box 2, an impeller 501 is movably installed inside the extrusion bin 5, an exhaust port 19 is opened at the bottom of the extrusion bin 5, a return air pipe 17 is fixedly connected to the bottom of the exhaust port 19, and return air nozzles 18 are fixedly installed at equal intervals on the inner side of the return air pipe 17, and the side of the extrusion bin 5 is fixedly connected to the exhaust port 19. An air inlet pipe 25 is provided, and the air inlet pipe 25 faces the impeller 501. Second tension springs 16 are fixedly connected to both sides of the bottom end of the top slide plate 14, and the top end of the second tension spring 16 is fixedly connected to the bottom of the extrusion bin 5. A pair of first tension springs 15 are fixedly connected between the bottom ends of two adjacent slide plates 14. A heating pipe 22 is fixedly installed at the bottom of the inner cavity of the drying box 2, and the heating pipe 22 is fixedly connected to the heating box 3. A pressurizing device 4 is fixedly installed on the top of the heating box 3. The air inlet end and the exhaust end of the pressurizing device 4 are fixedly connected to the drying box 2 and the air inlet pipe 25 through the exhaust pipe 13 and the air supply pipe 12 respectively. When the compound fertilizer particles enter the drying box 2, they will first fall onto the top slide 14. Before falling onto the surface of the slide 14, they will be affected by the hot air flow sent upward by the heating pipe 22 at the bottom, thereby slowing down the falling speed of the compound fertilizer particles. After falling onto the slide 14, the compound fertilizer particles will slide down to each slide 14 one by one and then fall to the bottom of the drying box 2. During the sliding process, the top slide 14 is affected by the hot air flow sent by the pressurizing device 4 and then sent to the inside of the extrusion bin 5 through the air supply pipe 12. The hot air flow is transported to the bottom end of the top slide 14 through the return air pipe 17 and the return air nozzle 18 through the exhaust port 19 at the bottom of the extrusion bin 5, and the bottom end of the slide 14 is intermittently impacted, so that the slide 14 is pulled synchronously by the first tension spring 15 to shake.

[0035] like Figure 1 , Figure 5 and Figure 6 As shown, the top of the extrusion bin 5 is fixedly connected to a stirring tank 6, an auger 20 is movably installed inside the stirring tank 6, a chassis 8 is fixedly installed on the top of the stirring tank 6, a first gear 23 and a second gear 24 are movably installed inside the chassis 8, the first gear 23 is fixedly connected to the top of the auger 20, a motor 9 is fixedly installed on the side of the stirring tank 6, the second gear 24 is fixedly connected to the output shaft of the motor 9, a chain is transmission-connected between the first gear 23 and the second gear 24, the second gear 24 and the first gear 23 are pulled to rotate by the motor 9, and then the auger 20 is rotated, the liquid compound fertilizer inside the stirring tank 6 is stirred, and the first gear 23 and the second gear 24 are protected by the chassis 8.

[0036] like Figure 7 and Figure 8 As shown, a push plate 21 is fixedly installed at the bottom of the auger 20, an extrusion base 26 is fixedly installed at the bottom of the mixing tank 6, and an extrusion port 261 is provided on the extrusion base 26, and a cutting base 502 is fixedly installed on the top of the impeller 501, and a cutting port 503 is provided on the cutting base 502, and the cutting base 502 is sleeved on the bottom of the extrusion base 26, and the cutting port 503 corresponds to the extrusion port 261. The bottom of the push plate 21 is truncated cone-shaped, and the extrusion base 26 and the cutting base 502 are both truncated cone-shaped. The push plate 21 is movably sleeved on the extrusion base 26. The inside of the base 26 is attached to the inner wall of the extrusion base 26, and the liquid compound fertilizer in the extrusion base 26 at the bottom of the mixing tank 6 is stirred and extruded by the pushing plate 21 at the bottom of the auger 20, so that the liquid compound fertilizer in the extrusion base 26 is extruded through the extrusion port 261 at the bottom of the extrusion base 26 and the cutting port 503 on the cutting base 502 in the middle of the impeller 501. At this time, the cutting base 502 cuts the compound fertilizer particles extruded from the cutting port 503 under the traction of the impeller 501, and then enters the inside of the drying box 2.

[0037] like Figure 1 As shown, a feed port 7 is fixedly installed on the top of the mixing tank 6, and the feed port 7 is located on the side of the auger 20. A discharge port 10 is fixedly connected to the side of the drying box 2, and a control valve 11 is fixedly installed on the side of the discharge port 10. The raw materials are fed into the interior of the mixing tank 6 through the feed port 7, and then the fluid compound fertilizer is stirred by the auger 20 inside the mixing tank 6. After the compound fertilizer particles enter the bottom of the inner cavity of the drying box 2, the discharge port 10 is controlled by the control valve 11 to discharge the compound fertilizer particles.

[0038] like Figure 2 As shown, the surfaces of the three slide plates 14 are all provided with air holes, the bottom end of the upper slide plate 14 faces the top of the adjacent slide plate 14, and the return air nozzles 18 fixedly connected at the bottom of the return air pipe 17 face the bottom end of the topmost slide plate 14. The air holes on the surfaces of the slide plates 14 can facilitate the heating pipe 22 at the bottom of the drying box 2 to deliver the gas to the interior of the drying box 2 and rise it upward, and then blow up the falling compound fertilizer particles, slowing down the falling speed of the compound fertilizer particles and preventing the fertilizer particles from falling and deforming, and blowing hot flow to the bottom end of the slide plate 14 through the return air nozzle 18 at the bottom of the return air pipe 17 to make the slide plate 14 shake.

[0039] This scheme also proposes a method for comprehensive utilization of heat in the production of sulfur-based compound fertilizers, the method is as follows:

[0040] S1. Putting the raw materials of the sulfur-based compound fertilizer into a stirring device for stirring;

[0041] S2, the liquid compound fertilizer after mixing is squeezed out through the squeezing bin, and cut into balls through the cutting device;

[0042] S3, the cut spherical compound fertilizer enters the drying box and falls onto the surface of the slide. Under the influence of the heat flow of the heating pipe at the bottom, the speed at which the compound fertilizer falls onto the slide is slowed down;

[0043] S4. The heat inside the drying box is extracted through the pressurizing device, and the hot air is sent back again through the reflux pipe to directly impact the bottom end of the slide plate, causing the slide plate to vibrate, thereby preventing the compound fertilizer from sticking to the slide plate and preventing the compound fertilizer particles from sticking to each other.

[0044] The working principle and use process of the present invention:

[0045] The raw materials are fed into the mixing tank 6 through the feeding port 7, and then the auger 20 inside the mixing tank 6 is used to stir the liquid compound fertilizer. The motor 9 drives the second gear 24 and the first gear 23 to rotate, thereby rotating the auger 20 to stir the liquid compound fertilizer inside the mixing tank 6. The pushing plate 21 at the bottom of the auger 20 stirs and squeezes the liquid compound fertilizer in the extrusion base 26 at the bottom of the mixing tank 6, so that the liquid compound fertilizer in the extrusion base 26 is squeezed out by the extrusion base 26. The material port 261 is extruded through the cutting opening 503 on the cutting base 502 in the middle of the impeller 501. At this time, the cutting base 502 cuts the compound fertilizer particles extruded from the cutting opening 503 under the traction of the impeller 501, and then enters the interior of the drying box 2. The air holes on the surface of the slide plate 14 can facilitate the heating pipe 22 at the bottom of the drying box 2 to send gas to the interior of the drying box 2, and rise upward, and then blow up the fallen compound fertilizer particles, slowing down the falling speed of the compound fertilizer particles and preventing the fertilizer particles from falling and deforming. The return air nozzle 18 at the bottom of the return air pipe 17 blows a hot flow to the bottom of the slide 14, causing the slide 14 to shake. When the compound fertilizer particles enter the drying box 2, they first fall on the top slide 14. Before falling on the surface of the slide 14, they are affected by the hot air flow sent upward by the heating pipe 22 at the bottom, thereby slowing down the falling speed of the compound fertilizer particles. After the compound fertilizer particles fall on the slide 14, they slide down one by one to each slide 14 and then fall to the bottom of the drying box 2. The compound fertilizer particles slide down one by one to each slide 14 and then fall to the bottom of the drying box 2. During the movement, the top slide plate 14 is subjected to the hot air flow sent by the pressurizing device 4 and then sent to the interior of the extrusion bin 5 through the air supply pipe 12. The hot air flow is transported to the bottom end of the top slide plate 14 through the exhaust port 19 at the bottom of the extrusion bin 5 through the return air pipe 17 and the return air nozzle 18, and the bottom end of the slide plate 14 is impacted intermittently, so that the slide plate 14 is pulled synchronously by the first tension spring 15 to shake. After the compound fertilizer particles enter the bottom of the inner cavity of the drying box 2, the discharge port 10 is controlled by the control valve 11 to discharge the compound fertilizer particles.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat comprehensive utilization device for the production of sulfur-based compound fertilizers, comprising a base (1), characterized in that: A drying box (2) and a heating box (3) are fixedly installed on the top of the base (1); three slide plates (14) are movably hinged in the inner cavity of the drying box (2); the three slide plates (14) are tiltedly arranged inside the drying box (2); the top of the drying box (2) is fixedly connected to an extrusion bin (5); an impeller (501) is movably installed inside the extrusion bin (5); an exhaust port (19) is opened at the bottom of the extrusion bin (5); the bottom of the exhaust port (19) is fixedly connected to an air return pipe (17); an air return nozzle (18) is fixedly installed equidistantly on the inner side of the air return pipe (17); an air intake pipe (25) is fixedly connected to the side of the extrusion bin (5); the air intake pipe (25) is fixedly connected to the inner side of the extrusion bin (5); and the air intake pipe (25) is fixedly connected to the inner side of the extrusion bin (5). 5) toward the impeller (501), the bottom ends of the top slide plate (14) are fixedly connected to the two sides with second tension springs (16), the top end of the second tension spring (16) is fixedly connected to the bottom of the extrusion bin (5), a pair of first tension springs (15) are fixedly connected between the bottom ends of two adjacent slide plates (14), a heating pipe (22) is fixedly installed at the bottom of the inner cavity of the drying box (2), the heating pipe (22) is fixedly connected to the heating box (3), a pressurizing device (4) is fixedly installed at the top of the heating box (3), the air inlet end and the air outlet end of the pressurizing device (4) are fixedly connected to the drying box (2) and the air inlet pipe (25) through the exhaust pipe (13) and the air supply pipe (12), respectively.

2. The heat comprehensive utilization equipment for the production of sulfur-based compound fertilizer according to claim 1 is characterized in that: The top of the extrusion bin (5) is fixedly connected to a stirring tank (6), an auger (20) is movably mounted inside the stirring tank (6), a chassis (8) is fixedly mounted on the top of the stirring tank (6), and a first gear (23) and a second gear (24) are movably mounted inside the chassis (8).

3. The heat comprehensive utilization equipment for producing sulfur-based compound fertilizer according to claim 2 is characterized in that: The first gear (23) is fixedly connected to the top of the auger (20), a motor (9) is fixedly mounted on the side of the mixing tank (6), the second gear (24) is fixedly connected to the output shaft of the motor (9), and a chain is transmission-connected between the first gear (23) and the second gear (24).

4. The heat comprehensive utilization equipment for producing sulfur-based compound fertilizer according to claim 2 is characterized in that: A pushing plate (21) is fixedly mounted on the bottom of the auger (20), an extrusion base (26) is fixedly mounted on the bottom of the mixing tank (6), and an extrusion port (261) is provided on the extrusion base (26).

5. The heat comprehensive utilization equipment for the production of sulfur-based compound fertilizer according to claim 1 is characterized in that: A cutting base (502) is fixedly mounted on the top of the impeller (501), a cutting opening (503) is provided on the cutting base (502), the cutting base (502) is sleeved on the bottom of the extrusion base (26), and the cutting opening (503) corresponds to the extrusion opening (261).

6. The heat comprehensive utilization equipment for producing sulfur-based compound fertilizer according to claim 4, characterized in that: The bottom of the push plate (21) is in a truncated cone shape, the extrusion base (26) and the cutting base (502) are both in a truncated cone shape, and the push plate (21) is movably sleeved inside the extrusion base (26) and fits against the inner wall of the extrusion base (26).

7. The heat comprehensive utilization equipment for producing sulfur-based compound fertilizer according to claim 2, characterized in that: A feeding port (7) is fixedly mounted on the top of the mixing tank (6), and the feeding port (7) is located on the side of the auger (20).

8. The heat comprehensive utilization equipment for producing sulfur-based compound fertilizer according to claim 1, characterized in that: A discharge port (10) is fixedly connected to the side of the drying box (2), and a control valve (11) is fixedly installed on the side of the discharge port (10).

9. The heat comprehensive utilization equipment for producing sulfur-based compound fertilizer according to claim 1, characterized in that: The surfaces of the three slide plates (14) are all provided with air holes, the bottom end of the upper slide plate (14) faces the top of the adjacent slide plate (14), and the return air nozzles (18) fixedly connected to the bottom of the return air pipe (17) all face the bottom end of the topmost slide plate (14).

10. A method for comprehensive utilization of heat in the production of sulfur-based compound fertilizers, characterized in that: The method of use is as follows: S1. Putting the raw materials of the sulfur-based compound fertilizer into a stirring device for stirring; S2, the liquid compound fertilizer after mixing is squeezed out through the squeezing bin, and cut into balls through the cutting device; S3, the cut spherical compound fertilizer enters the drying box and falls onto the surface of the slide. Under the influence of the heat flow of the heating pipe at the bottom, the speed at which the compound fertilizer falls onto the slide is slowed down; S4. The heat inside the drying box is extracted through the pressurizing device, and the hot air is sent back again through the reflux pipe to directly impact the bottom end of the slide plate, causing the slide plate to vibrate, thereby preventing the compound fertilizer from sticking to the slide plate and preventing the compound fertilizer particles from sticking to each other.

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