Rotary drying and cooling all-in-one machine

Abstract

The utility model discloses a rotary drying and cooling all-in-one machine which is characterized in that a barrel sequentially comprises a feeding sealing cover, a hot side rotary barrel, a dust outlet sealing cover, a cold side rotary barrel and a dry material outlet sealing cover, and all the sealing covers are fixed on a mounting base; the upper part of the feeding sealing cover is connected with a wet material inlet, the hot-side drum and the cold-side drum are movably connected with each other and two ends are sealed, and the bottom of the dry material outlet sealing cover is connected with a dry material outlet; shoveling plates are uniformly arranged on the inner wall of the rotary drum; the central air pipe sequentially comprises a hot-side steam inlet, a hot-side air delivery pipe, a cold-side air delivery pipe and a cooling air inlet which are connected into a whole, the hot-side air delivery pipe is located in an inner cavity of the hot-side rotary drum, the cold-side air delivery pipe is located in an inner cavity of the dry material outlet sealing cover, and connecting parts of the hot-side air delivery pipe and the cold-side air delivery pipe are separated from each other; and a plurality of groups of conical nozzles pointing to the inner cavity of the barrel are uniformly arranged along the axial direction and the circumferential direction of the hot side gas conveying pipe and the cold side gas conveying pipe. According to the scheme, heating and cooling are completed in the same equipment, and the equipment investment and the conveying and transferring cost are reduced.

Description

Technical Field

[0001] The utility model relates to a dryer, in particular to a rotary drying and cooling integrated machine, belonging to the technical field of comprehensive resource utilization. Background Art

[0002] Rotary drum dryers are suitable for processing large quantities of granular materials with low moisture content. Their main body is a slightly inclined rotating cylinder. Wet material is fed through one end, passes through the cylinder, and is dried by effective contact with the hot air passing through the cylinder or the heated wall surface before being discharged from the bottom of the other end. They offer advantages such as simple structure, reliable operation, strong adaptability, and high processing capacity. They are widely used in industries such as metallurgy, building materials, chemicals, and coal.

[0003] In the chemical industry, rotary drum dryers are commonly used to dry materials such as ammonium sulfate, ammonium nitrate, urea, and calcium carbonate. They primarily consist of a drum, lifting plates, a transmission mechanism, a support system, and a feed and discharge mechanism. During operation, wet material is fed into the dryer through one end. The lifting plates within the drum evenly distribute and disperse the material within the dryer, allowing it to fully come into contact with the co-current hot air. After drying, the material must be cooled in the next process, resulting in high transportation and operating costs. Furthermore, the material is prone to moisture resorption and clumping, making packaging difficult.

[0004] Chinese utility model patent publication number CN 220926540U discloses a sludge double-rotary drum dryer, comprising a mounting base, a fixed sleeve, a rotating sleeve, a rotary drive mechanism, and an oscillating scraper mechanism. Wet sludge is fed into the machine from the upper end of the rotating sleeve. Hot air from a hot air blower enters the lower end of the rotating sleeve, where it is rotated by the rotating mechanism. The hot air heats and dehumidifies the wet sludge, which then flows to the lower side of the drum under the action of gravity, achieving drying and dehumidification.

[0005] However, the above-mentioned dryer scheme and the existing technology have the following defects: 1. The heating air is provided by a hot air blower, which has low drying efficiency, high power consumption and poor economic efficiency; 2. The outlet material is not cooled by cold air, and the high-temperature material after dehumidification will become damp again, affecting the drying effect; 3. The heating air enters from the bottom of the equipment and is unevenly distributed, and does not come into contact with the heated medium in time, which affects the heating effect; 4. There is no weighing device, and the drying effect and material accumulation in the rotary dryer cannot be known in time, which can easily cause blockage and cause system shutdown. Utility Model Content

[0006] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and utility model title of this application, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0007] In view of the above problems and / or the problems existing in the prior art, the present utility model is proposed.

[0008] The purpose of the utility model is to overcome the problems existing in the prior art and provide a rotary drying and cooling integrated machine. During the process of materials moving from the feed end to the discharge end, they are successively heated by steam and cooled by cold air. Heating and cooling are completed in the same device, which reduces equipment investment and material transportation and transfer costs, avoids product moisture recurrence, and has low production energy consumption.

[0009] In order to solve the above technical problems, the utility model provides a rotary drying and cooling integrated machine, comprising a horizontal cylinder, said cylinder comprising a feed sealing cover, a hot side rotary drum, a dust outlet sealing cover, a cold side rotary drum and a dry material outlet sealing cover in sequence, said feed sealing cover, dust outlet sealing cover and dry material outlet sealing cover are all fixed on a mounting base; the upper part of the feed sealing cover is connected with a wet material inlet, the feed end of the hot side rotary drum and the outlet of the feed sealing cover are movably docked and sealed with each other, the discharge end of the hot side rotary drum and the feed end of the dust outlet sealing cover are movably connected and sealed with each other, the top of the dust outlet sealing cover is provided with a dust outlet, the discharge end of the dust outlet sealing cover is movably connected and sealed with the feed end of the cold side rotary drum, the discharge end of the cold side rotary drum and the feed end of the dry material outlet sealing cover are movably connected and sealed with each other, and the bottom of the dry material outlet sealing cover is connected with a dry material outlet; the inner walls of the hot side rotary drum and the cold side rotary drum are evenly provided with a plurality of copying plates;

[0010] A central air pipe is provided along the center line of the cylinder, and the central air pipe includes a hot side steam inlet, a hot side air pipe, a cold side air pipe and a cooling air inlet which are connected as one. The hot side steam inlet extends from the center of the feed end wall panel of the feed sealing cover, the hot side air pipe is located in the inner cavity of the hot side rotary drum, the cold side air pipe is located in the inner cavity of the dry material outlet sealing cover, and the cooling air inlet extends from the center of the discharge end wall panel of the dry material outlet sealing cover. The connection between the hot side air pipe and the cold side air pipe is separated by a hot and cold gas barrier plate. A plurality of groups of conical nozzles pointing to the inner cavity of the cylinder are evenly provided along the axial and circumferential directions of the hot side air pipe and the cold side air pipe.

[0011] As an improvement of the present invention, a hot side drum transmission gear is provided on the middle periphery of the hot side drum, a hot side rotating motor is installed in the middle of the mounting base, and the pinion at the output end of the hot side rotating motor is meshed with the hot side drum transmission gear.

[0012] As a further improvement of the present invention, a cold side drum transmission gear is provided on the middle periphery of the cold side drum, a cold side rotating motor is installed on the mounting base, and the pinion at the output end of the cold side rotating motor is meshed with the cold side drum transmission gear.

[0013] As a further improvement of the present invention, a head end base is installed at the head end of the mounting base, and a central air pipe rotating motor is installed on the head end base to drive the central air pipe.

[0014] As a further improvement of the present invention, the bottom of the mounting base is connected to the weighing base below via twelve spring support rods.

[0015] As a further improvement of the present invention, spiral scrapers are wound around the outer circumferences of the hot-side gas pipe and the cold-side gas pipe.

[0016] Compared with the existing technology, the utility model has achieved the following beneficial effects: 1. It is used for drying, cooling and dust treatment of granular products, and the dust is collected, processed and recycled separately; cooling air is introduced into the end of the air pipe to cool the dried material, eliminating the need for subsequent cooling equipment. The dried material is cooled immediately to avoid moisture or agglomeration, effectively improving production efficiency and meeting increasingly stringent environmental emission requirements.

[0017] 2. The rotary dryer and cooler is connected to the ground foundation via twelve spring support rods, which effectively absorb the severe vibrations during operation and reduce the impact of equipment vibration on the foundation. The spring support rods also enhance the vibration frequency of the dryer itself, accelerating the shedding of sticky materials inside the dryer, reducing scaling, and extending the rotary dryer's continuous operation time.

[0018] 3. A weighing base is designed at the bottom of the dryer to monitor the material handling capacity inside the dryer in real time, preventing the material entering the dryer from exceeding the equipment's maximum handling capacity. The total weight of the entire rotary drying and cooling machine is monitored in real time through a pressure sensor, and an overweight alarm is designed to avoid the risk of overflow and shutdown of the drying system.

[0019] 4. The dryer features a rotating hot and cold coexisting gas pipe. The dryer's heating steam and cooling air are discharged through a tapered nozzle on the outer wall of the central gas pipe, directly contacting the particles. This ensures efficient contact between the hot and cold gases and the treated material, minimizing heat loss. A gas baffle separates the hot and cold media within the pipe. High-pressure secondary steam and cooling air are discharged through the tapered nozzle, dispersing material dust and effectively increasing the heat exchange area between the treated medium and the gas. Furthermore, to prevent material from accumulating on the outer wall of the gas pipe, which could affect gas discharge and system operation, the dryer features a central gas pipe rotation motor and spiral scrapers. The rotating pipe and scrapers shovel any material adhering to the outer wall to the bottom of the dryer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. The drawings are only provided for reference and explanation, and are not intended to limit the present invention. Among them:

[0021] Figure 1 This is a three-dimensional diagram of the rotary drying and cooling integrated machine of the present invention;

[0022] Figure 2 This is a cross-sectional view of the rotary drying and cooling integrated machine of the present invention;

[0023] In the figure: a1. Head end base; a2. Center air pipe rotating motor; a3. Hot side steam inlet; a4. Transmission mechanism shield; a5. Wet material inlet;

[0024] b1. Feed seal cover; b2. Scraper; b3. Hot side drum; b4. Hot side drum transmission gear; b5. Hot side air pipe; b6. Spiral scraper; b7. Conical nozzle;

[0025] c1. Dust outlet sealing cover; c2. Dust outlet; c3. Cold side drum transmission gear; c4. Dry material outlet sealing cover; c5. Cooling air inlet; c6. Dry material outlet; c7. Hot and cold gas barrier; c8. Cold side air pipe; c9. Cold side drum;

[0026] d1. Cold side rotating motor; d2. Mounting base; d3. Hot side rotating motor; d4. Weighing base; d5. Spring support rod; 8e. Lifting adjustment mechanism. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific figures. Obviously, the embodiments described are only a part of the present invention, not all of the embodiments.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] like Figure 1 、 Figure 2As shown, the barrel of the rotary drying and cooling integrated machine of the present invention includes a feed sealing cover b1, a hot side rotary drum b3, a dust outlet sealing cover c1, a cold side rotary drum c9 and a dry material outlet sealing cover c4 in sequence. The feed sealing cover b1, the dust outlet sealing cover c1 and the dry material outlet sealing cover c4 are all fixed on the mounting base d2. The upper part of the feed side wall panel of the feed sealing cover b1 is connected with the wet material inlet a5, the feed end of the hot side drum b3 is movably connected with the outlet of the feed sealing cover b1 and sealed with each other, the discharge end of the hot side drum b3 is movably connected with the feed end of the dust outlet sealing cover c1 and sealed with each other, the top of the dust outlet sealing cover c1 is provided with a dust outlet c2, the discharge end of the dust outlet sealing cover c1 is movably connected with the feed end of the cold side drum c9 and sealed with each other, the discharge end of the cold side drum c9 is movably connected with the feed end of the dry material outlet sealing cover c4 and sealed with each other, and the bottom of the dry material outlet sealing cover c4 is connected with the dry material outlet c6.

[0030] A central air pipe is provided along the center line of the cylinder, which includes a hot side steam inlet a3, a hot side air pipe b5, a cold side air pipe c8 and a cooling air inlet c5 which are connected as one. The hot side steam inlet a3 extends from the center of the feed end wall panel of the feed sealing cover b1, the hot side air pipe b5 is located in the inner cavity of the hot side rotating drum b3, the cold side air pipe c8 is located in the inner cavity of the dry material outlet sealing cover c4, and the cooling air inlet c5 extends from the center of the discharge end wall panel of the dry material outlet sealing cover c4. The connection between the hot side air pipe b5 and the cold side air pipe c8 is separated by a hot and cold gas barrier plate c7.

[0031] The outer circumference of the hot side gas pipe b5 and the cold side gas pipe c8 is wrapped with a spiral scraper b6, and multiple groups of conical nozzles b7 pointing to the inner cavity of the cylinder are evenly arranged along the axial and circumferential directions of the hot side gas pipe b5 and the cold side gas pipe c8.

[0032] Multiple lifting plates b2 are evenly arranged on the inner walls of the hot side rotating drum b3 and the cold side rotating drum c9. A hot side rotating drum transmission gear b4 is provided on the central outer periphery of the hot side rotating drum b3. A hot side rotating motor d3 is installed in the middle of the mounting base d2. The small gear at the output end of the hot side rotating motor d3 is meshed with the hot side rotating drum transmission gear b4.

[0033] A cold side drum transmission gear c3 is provided on the central periphery of the cold side drum c9. A cold side rotating motor d1 is installed on the mounting base d2. The pinion at the output end of the cold side rotating motor d1 meshes with the cold side drum transmission gear c3.

[0034] The head end of the mounting base d2 is installed with a head end base a1, and the head end base a1 is installed with a central air pipe rotating motor a2. The central air pipe rotating motor a2 drives the air pipe and the spiral scraper b6 to rotate at a constant speed through a belt, pushing the material to the end, and at the same time moving in the opposite direction of the scraper b2, which is conducive to breaking large pieces of material; a transmission mechanism shield a4 is installed on the outside of the belt.

[0035] Wet material enters the dryer's sealed feed hood b1 through wet material inlet a5. Due to its tilted angle, the wet material flows into the inner cavity of the hot-side drum b3. As the drum rotates at a constant speed, lifters b2 attached to the drum's inner wall lift the wet material, allowing it to fully contact the hot steam and evaporate the moisture from its surface. When the dry material solids reach the rear section of the drum, cooling air from the air pipe cools the dry solids. The air then enters the sealed dry material outlet hood c4 and is discharged through the dry material outlet c6 at the bottom of the dryer.

[0036] The hot side drum b3 is located between the feed sealing cover b1 and the dust outlet sealing cover c1. The small gear at the rotor shaft end of the hot side rotating motor d3 drives the hot side drum transmission gear b4 to rotate, and the rotation rate of the hot side drum b3 can be controlled by adjusting the motor frequency.

[0037] Similarly, the cold-side drum C9 is located between the dust outlet sealing cover C1 and the dry material outlet sealing cover C4. A pinion on the rotor shaft of the cold-side rotary motor D1 drives the cold-side drum transmission gear C3. The rotation rate of the cold-side drum C9 is controlled by adjusting the frequency of the cold-side rotary motor D1. While the three sealing covers remain stationary, the drum rotates, and its speed can be freely adjusted according to the material throughput.

[0038] Steam enters the hot side gas pipe b5 through the hot side steam inlet a3, and flows out from the conical nozzles b7 evenly distributed on the outer wall of the gas pipe, providing heat for evaporating the moisture on the surface of the material.

[0039] The cooling air enters the cold side air delivery pipe c8 through the cooling air inlet c5, and also flows out from the conical nozzles b7 evenly distributed on the outer wall of the pipe, cooling the dried material and facilitating loading and discharge.

[0040] The rotary dryer and cooler is designed with a monolithic mounting base d2 at its base. The bottom of this base d2 is connected to the lowest weighing base d4 via twelve spring support rods d5. These spring support rods d5 effectively absorb the severe vibrations during operation, reducing their impact on the unit's foundation. They also increase the vibration frequency of the dryer itself, accelerating the shedding of adhering materials, reducing scaling, and extending the dryer's continuous operation. A pressure sensor is mounted on the weighing base d4 to monitor the unit's overall weight in real time. This allows the unit to accurately measure the material handling capacity within the dryer, enhancing operational accuracy.

[0041] A lifting adjustment mechanism 8e is designed between the mounting base d2 and the weighing base d4 to adjust the lifting height of one side of the dryer, thereby adjusting the inclination angle of the dryer drum and controlling the drying residence time of the material.

[0042] The above description is only a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention, but does not limit the scope of patent protection of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. In addition to the above embodiments, the present invention may have other implementation methods without departing from the spirit and scope of the present invention. The present invention may also have various changes and improvements, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the attached claims and their equivalents. Technical features not described in the present invention can be achieved by or using existing technologies, and will not be described here.

Claims

1. A rotary drying and cooling integrated machine, comprising a horizontal cylinder, characterized in that: The cylinder body comprises a feed sealing cover, a hot side rotary drum, a dust outlet sealing cover, a cold side rotary drum and a dry material outlet sealing cover in sequence, and the feed sealing cover, the dust outlet sealing cover and the dry material outlet sealing cover are all fixed on the mounting base; the upper part of the feed sealing cover is connected with a wet material inlet, the feed end of the hot side rotary drum and the outlet of the feed sealing cover are movably connected and sealed to each other, the discharge end of the hot side rotary drum and the feed end of the dust outlet sealing cover are movably connected and sealed to each other, the top of the dust outlet sealing cover is provided with a dust outlet, the discharge end of the dust outlet sealing cover is movably connected and sealed to the feed end of the cold side rotary drum, the discharge end of the cold side rotary drum and the feed end of the dry material outlet sealing cover are movably connected and sealed to each other, and the bottom of the dry material outlet sealing cover is connected with a dry material outlet; the inner walls of the hot side rotary drum and the cold side rotary drum are evenly provided with a plurality of copying plates; A central air pipe is provided along the center line of the cylinder, which includes a hot side steam inlet, a hot side air pipe, a cold side air pipe and a cooling air inlet, which are connected in sequence. The hot side steam inlet extends from the center of the feed end wall plate of the feed sealing cover. The hot side air pipe is located in the inner cavity of the hot side drum. The cold side air pipe is located in the inner cavity of the dry material outlet sealing cover. The cooling air inlet extends from the center of the discharge end wall plate of the dry material outlet sealing cover. The connection between the hot side air pipe and the cold side air pipe is separated by a hot and cold gas barrier plate. A plurality of groups of conical nozzles pointing to the inner cavity of the cylinder are evenly arranged along the axial direction and circumferential direction of the hot side gas transmission pipe and the cold side gas transmission pipe.

2. The rotary drying and cooling integrated machine according to claim 1, characterized in that: A hot side drum transmission gear is provided on the central periphery of the hot side drum, a hot side rotating motor is installed in the middle of the mounting base, and a small gear at the output end of the hot side rotating motor is meshed with the hot side drum transmission gear.

3. The rotary drying and cooling integrated machine according to claim 1, characterized in that: A cold side drum transmission gear is provided on the central periphery of the cold side drum, a cold side rotating motor is installed on the mounting base, and a small gear at the output end of the cold side rotating motor is meshed with the cold side drum transmission gear.

4. The rotary drying and cooling integrated machine according to claim 1, characterized in that: The head end of the mounting base is provided with a head end base, and the head end base is provided with a central air pipe rotating motor to drive the central air pipe.

5. The rotary drying and cooling integrated machine according to claim 1, characterized in that: The bottom of the mounting base is connected to the weighing base below through twelve spring support rods.

6. The rotary drying and cooling integrated machine according to any one of claims 1 to 5, characterized in that: The outer circumferences of the hot-side gas delivery pipe and the cold-side gas delivery pipe are wound with spiral scrapers.

Images