Indirect rotor drying machine and method of using the same

Abstract

An indirect rotor dryer comprises a rotor drying cylinder, a drying chamber is arranged in the rotor drying cylinder, an outer cylinder is sealedly connected to the outer side of the rotor drying cylinder, a drying outer chamber is formed between the outer cylinder and the rotor drying cylinder, the rotor drying cylinder comprises a frame, a rotating drive shaft, an inner cylinder and a stirring push rod; the stirring push rod comprises at least one extension rod arranged on the outer side of the rotating drive shaft, an arc-shaped stratification plate arranged on the extension rod and a material distribution guide part arranged on the outer side of the arc-shaped stratification plate, a guiding surface is arranged on the material distribution guide part, when the extension rod rotates, the guiding surface on the material distribution guide part pushes the material on the inner wall of the rotor drying cylinder to the outside of the rotating plane to form a heat exchange space in contact with the inner wall of the rotor drying cylinder at the center position, the arc-shaped stratification plate is inserted into the material and separates the upper layer material from the lower layer material and falls into the heat exchange space to contact and exchange heat with the inner wall of the rotor drying cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, and in particular to an indirect rotor dryer and a use method thereof. Background Art

[0002] When sludge is treated, it is usually necessary to dehydrate and dry the sludge to facilitate the subsequent treatment steps; the existing indirect rotor dryer usually adopts a conduction type dryer that uses high-temperature hot flue gas as a heat medium, that is, the rotor drying cylinder is heated by high-temperature hot flue gas, so that the sludge material inside the rotor drying cylinder absorbs heat through the inner wall of the rotor drying cylinder and is dried;

[0003] The existing indirect rotor dryer usually has an outer cylinder and an inner cylinder that are fixedly arranged. High-temperature flue gas is passed into the space between the outer cylinder and the inner cylinder to heat the inner cylinder, and the sludge material is stirred and dried by the rotor in the inner cylinder. Since the sludge material is piled up and down after entering the inner cylinder of the rotor dryer, the upper piled material cannot contact and exchange heat with the inner wall of the rotor dryer, and the stirring rod cannot quickly stir the upper material to the position where the lower layer contacts the inner wall as required, thereby affecting the drying speed of the rotor dryer; at the same time, the sludge material is always located at the bottom of the rotor drying cylinder, so that the temperature at the bottom of the rotor drying cylinder drops rapidly, and in the process of continuous drying of the sludge material, the drying effect of subsequent materials is poor, and the sludge material cannot be dried quickly. Summary of the invention

[0004] The present invention aims to solve the problems existing in the above-mentioned prior art and provides an indirect rotor dryer, which can accelerate the water loss of the material at the bottom of the rotor drying cylinder, thereby ensuring the rapid drying of the sludge material and the drying effect of the rotor dryer during continuous operation.

[0005] The present invention solves the technical problem by adopting a technical solution: the indirect rotor dryer comprises a rotor drying cylinder, a drying chamber for placing materials is arranged inside the rotor drying cylinder, an outer cylinder is sealedly connected to the outside of the rotor drying cylinder, and an outer drying chamber for introducing high-temperature gas is formed between the outer cylinder and the rotor drying cylinder, the rotor drying cylinder comprises a frame, a rotating drive shaft connected to the frame and driven to rotate by a driving device, an inner cylinder surrounding the outside of the rotating drive shaft and forming a drying chamber between the rotating drive shaft, and a stirring push rod arranged outside the rotating drive shaft for driving the material to move in a directional manner;

[0006] The stirring push rod includes at least one extension rod arranged on the outside of the rotating drive shaft, an arc-shaped stratification plate arranged on the extension rod along the rotation trajectory of the outside of the extension rod, and a material distribution guide part arranged on the outside of the arc-shaped stratification plate and in contact with the inner wall of the rotor drying cylinder. The material distribution guide part is provided with a guiding surface. When the extension rod drives the arc-shaped stratification plate and the material distribution guide part to rotate, the guiding surface on the material distribution guide part pushes the material on the inner wall of the rotor drying cylinder to the outside of the rotation plane to form a heat exchange space in contact with the inner wall of the rotor drying cylinder at the center position. The arc-shaped stratification plate is inserted into the material to separate the upper layer of material from the lower layer of material and fall into the heat exchange space to contact and exchange heat with the inner wall of the rotor drying cylinder.

[0007] Preferably, the stirring push rod also includes at least one group of connecting parts which are axially spaced apart and rotate with the rotating driving shaft, an auxiliary heat transfer plate is provided on the outside of the connecting part and is fitted with the inner wall of the upper end of the inner cylinder, and an auxiliary heat transfer plate is provided which rotates with the rotating driving shaft. When in use, the rotating auxiliary heat transfer plate absorbs heat from the high-temperature upper end of the rotor drying cylinder, and releases heat when it rotates to the lower end and contacts the rotor drying cylinder with the material, thereby further accelerating the water loss rate of the material at the bottom of the rotor drying cylinder, thereby ensuring the drying effect of the rotor drying cylinder during continuous operation.

[0008] Preferably, a deformation portion is provided at the lower end of the inner cylinder, which is located outside the auxiliary heat transfer plate and expands the drying chamber downward. The deformation portion includes an arc-shaped bottom surface at the lower end and connecting surfaces arranged on the front and rear sides of the arc-shaped bottom surface and respectively connected to the arc-shaped bottom surface and the inner cylinder. The deformation portion is provided with a downwardly expanding deformation, which indirectly increases the contact area between the sludge material and the bottom of the rotor drying cylinder, thereby accelerating the water loss rate of the material. At the same time, it also makes the auxiliary heat transfer plate located in the middle layer of the material and not in contact with the rotor drying cylinder when it rotates to the lower end position, so that the middle layer of the material that is not in contact with the inner wall of the rotor drying cylinder can also absorb heat and evaporate water, thereby further accelerating the drying speed of the material.

[0009] Preferably, an angle adjuster for adjusting the axial inclination angle of the rotor drying cylinder is provided on the frame to adjust the drying time and discharge speed of the material in the rotor drying cylinder and ensure smooth movement of the material in the rotor drying cylinder.

[0010] Preferably, a bottom driving plate is provided on the auxiliary heat transfer plate and can move inward and outward relative to the auxiliary heat transfer plate. The bottom driving plate is inclined relative to the rotation plane of the rotating drive shaft. The material in the deformation part at the lower end of the rotor drying cylinder is directionally driven by the bottom driving plate to avoid the material in the deformation part from staying for a long time.

[0011] Preferably, a movable channel is opened on the auxiliary heat transfer plate, and the bottom driving plate includes a driving plate body that is movably connected inside and outside the movable channel, an external limiting part arranged at the outer end of the driving plate body, and a counterweight stripping part arranged at the inner end of the driving plate body, and a scraping part corresponding to the movable channel is provided on the outer side of the driving plate body.

[0012] Preferably, the connecting surface is arranged to expand outward, and an auxiliary space for the bottom driving plate to slide outward is provided between the connecting surface and the auxiliary heat transfer plate, so that when the bottom driving plate is rotated to the connecting surface position, the bottom driving plate has sufficient space to move outward, and before the auxiliary heat transfer plate rotates to the lowest position, the bottom driving plate on the auxiliary heat transfer plate extends a sufficient length, so that after rotating into the material, it can realize the function of directionally driving the material.

[0013] Preferably, a hidden groove corresponding to the outer limiting portion is opened on the outer side of the auxiliary heat transfer plate, the depth of the hidden groove is the same as the thickness of the outer limiting portion, and a conical discharge channel connected to the movable channel is provided at the bottom of the hidden groove.

[0014] Preferably, a feed port is provided on the upper side of one axial end of the rotor drying cylinder, and a discharge port is provided on the lower side of the other axially opposite end of the rotor drying cylinder. The drying chamber includes a feed chamber arranged in the rotor drying cylinder near the feed port, a dehumidification chamber connected to the feed chamber, a blocking chamber connected to the dehumidification chamber, and a crushing chamber connected to the blocking chamber. The auxiliary heat transfer plate is located in the dehumidification chamber, and the extension rods are arranged in the blocking chamber at intervals. A steam outlet connected to the dehumidification chamber is provided at the upper end of the rotor drying cylinder. The stirring push rod also includes a pushing rod located in the feed chamber, a cutting blocking rod located in the blocking chamber, and a crushing rod located in the crushing chamber. The cutting blocking rods and the crushing rods are provided in a plurality of groups. The plurality of groups of cutting blocking rods are arranged along the axial direction and staggered with each other on the outside of the rotating drive shaft. The crushing rod includes a connecting rod fixedly connected to the outside of the rotating drive shaft and a hammer head arranged at the outer end of the connecting rod.

[0015] Preferably, an air inlet pipe connected to the drying outer chamber is provided on the side of the outer cylinder corresponding to the dehumidification chamber, an air outlet pipe connected to the drying outer chamber is provided on the side of the outer cylinder corresponding to the crushing chamber, an air flow adjustment plate located between the dehumidification chamber and the blocking chamber is provided in the drying outer chamber, the outer side of the air flow adjustment plate is sealed connected to the inner wall of the outer cylinder and the inner side is sealed connected to the outside of the inner cylinder, and an outgoing hole located on the outer side of the lower end of the rotor drying cylinder is provided on the air flow adjustment plate.

[0016] A method for using an indirect rotor dryer comprises the following steps:

[0017] Step 1: start the angle adjuster according to the use requirements to adjust the unloaded rotor drying cylinder to the corresponding working angle; pass the high-temperature gas into the drying outer chamber of the outer cylinder through the air inlet pipe to preheat the rotor drying cylinder;

[0018] Step 2: Start the driving device to drive the rotating drive shaft to rotate, and pour the material to be dried from the feed port of the rotor drying cylinder. The material enters the feed chamber through the feed port and is located at the lower end of the feed chamber and is pushed into the dehumidification chamber under the action of the push rod; when the material enters the dehumidification chamber, the lower end contacts the high-temperature inner wall of the inner cylinder, so that the moisture in the material absorbs heat and evaporates and is discharged from the steam outlet at the upper end; at the same time, the auxiliary heat transfer plate rotates under the action of the rotating drive shaft. When the auxiliary heat transfer plate rotates to the upper end, the auxiliary heat transfer plate gradually approaches the high-temperature inner wall of the inner cylinder until it is in close contact with the inner cylinder, thereby realizing the heat absorption of the auxiliary heat transfer plate. During the heat absorption process, the bottom driving plate moves inward relative to the auxiliary heat transfer plate under the gravity of the counterweight stripping part, thereby ensuring that the auxiliary heat transfer plate is in full contact with the inner wall of the inner cylinder; when the auxiliary heat transfer plate gradually rotates to the lower end, the auxiliary heat transfer plate rotates into the middle layer of the material, thereby further transferring the heat on the auxiliary heat transfer plate to the material to complete the heat release process and accelerate the heat absorption speed of the material. During the above heat release process, the bottom driving plate moves outward relative to the auxiliary heat transfer plate under the gravity of the counterweight stripping part, thereby allowing the material at the lower end of the dehumidification chamber to move toward the side of the discharge port under the action of the rotating bottom driving plate;

[0019] Step 3: After being dehumidified in the dehumidification chamber, the material enters the block chamber. At this time, most of the moisture in the material is heated and evaporated to begin to agglomerate. When the material moves to the position outside the extension rod, the extension rod drives the arc-shaped stratification plate and the material-dividing guide to rotate. When the material-dividing guide rotates downward and contacts the material, the arc-shaped stratification plate is inserted into the upper material to separate the upper material from the lower material and enter the upper end of the arc-shaped stratification plate. At the same time, the lower material after separation contacts the material-dividing guide. Under the action of the guiding surface, the lower material moves to the outside of the rotating plane, thereby forming a heat exchange space with the inner wall of the rotor drying cylinder exposed at the position of the original lower material. During the continuous rotation of the extension rod, the upper material moves backward relative to the arc-shaped stratification plate and then falls into the heat exchange space to contact and exchange heat with the inner wall of the rotor drying cylinder. At the same time, the cutting and dividing rod in the block chamber rotates to cut and divide the agglomerated material after entering the block chamber, thereby cutting and dispersing the large block material into several small blocks.

[0020] Step 4: The small pieces of material cut by the block chamber enter the crushing chamber. The rotating crushing rod in the crushing chamber hits and crushes the small pieces of material, and the dried material after crushing falls out from the discharge port.

[0021] The beneficial effects of the present invention are as follows: an auxiliary heat transfer plate is provided in the present invention which rotates along with the rotating drive shaft, and when in use, the rotating auxiliary heat transfer plate absorbs heat from the upper end of the high-temperature rotor drying cylinder, and releases heat when rotating to the lower end and contacting the rotor drying cylinder and the material, thereby further accelerating the water loss rate of the material at the bottom of the rotor drying cylinder, and ensuring the drying effect of the rotor drying cylinder when it continues to work; at the same time, a deformation portion which expands and deforms downward is also provided, which indirectly increases the contact area between the sludge material and the bottom of the rotor drying cylinder, thereby accelerating the water loss rate of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 A top view of the present invention;

[0024] Figure 3 for Figure 2 Cross-sectional view in EE direction;

[0025] Figure 4 for Figure 3 A schematic diagram of the structure of the rotating drive shaft;

[0026] Figure 5 It is a schematic diagram of the structure of the extension rod, the arc-shaped layering plate and the material distribution guide;

[0027] Figure 6 for Figure 2 A cross-sectional view in the EE direction when a deformation portion is provided on the inner cylinder;

[0028] Figure 7 for Figure 6 A magnified view of part A;

[0029] Figure 8 for Figure 6 A magnified view of part B;

[0030] Fig. 9 It is a schematic diagram of the structure of the rotating drive shaft with a bottom drive plate;

[0031] Fig.10 for Figure 2 A cross-sectional view in the FF direction when a deformation portion is provided on the inner cylinder.

[0032] Description of the accompanying drawings: 1. Rotor drying cylinder, 1-1. Frame, 1-2. Rotating drive shaft, 1-3. Inner cylinder, 2. Drying chamber, 2-1. Dehumidification chamber, 2-2. Blocking chamber, 2-3. Crushing chamber, 2-4. Feeding chamber, 3. Outer cylinder, 4. Drying outer chamber, 5. Connector, 6. Auxiliary heat transfer plate, 7. Deformation part, 7-1. Arc bottom surface, 7-2. Connecting surface, 8. Angle adjuster, 9. Bottom driving plate, 9-1. Driving plate body, 9-2. External limiting part, 9-3. Counterweight stripping part, 10. Movable channel, 11. Scraping part, 12 , auxiliary space, 13, hidden groove, 14, conical discharge channel, 15, feed port, 16, discharge port, 17, cutting and dividing rod, 18, breaking rod, 18-1, connecting rod, 18-2, hammer head, 19, air inlet pipe, 20, air outlet pipe, 21, air flow adjustment plate, 22, outgoing hole, 23, pushing rod, 24, steam outlet, 25, bottom plate, 26, fixed plate, 27, mounting groove, 28, hydraulic push rod, 29, height adjustment rod, 30, accommodating groove, 31, extension rod, 32, arc-shaped layering plate, 33, material dividing guide, 34, guide surface. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings:

[0034] Embodiment 1

[0035] Refer to the attached Figure 1 : The present embodiment discloses an indirect rotor drying machine, comprising a rotor drying cylinder 1 provided with a drying chamber 2 for placing materials, a feed port 15 is provided on the upper side of one axial end of the rotor drying cylinder 1, and a discharge port 16 is provided on the lower side of the other axial end of the rotor drying cylinder 1 opposite thereto. The feed port 15 in the present embodiment is arranged at the right end of the rotor drying cylinder 1, and the discharge port 16 is arranged at the left end of the rotor drying cylinder 1. An outer cylinder 3 is sealedly connected to the outside of the rotor drying cylinder 1, and a drying outer chamber 4 for introducing high-temperature gas is formed between the outer cylinder 3 and the rotor drying cylinder 1. An air inlet pipe 19 and an air outlet pipe 20 connected to the drying outer chamber 4 are respectively provided on the outer cylinder 3. In the present embodiment, In order to prolong the survival time of the high-temperature gas in the drying outer chamber 4, in this embodiment, the air inlet pipe 19 is arranged at the right end of the outer cylinder 3, and the air outlet pipe 20 is arranged at the left end of the outer cylinder 3; wherein, the drying chamber 2 in this embodiment includes a feed chamber 2-4 arranged in the rotor drying cylinder 1 near the feed port 15, a dehumidification chamber 2-1 connected to the feed chamber 2-4, a segmentation chamber 2-2 connected to the dehumidification chamber 2-1, and a crushing chamber 2-3 connected to the segmentation chamber 2-2; specifically, the air inlet pipe 19 in this embodiment is arranged on the side of the outer cylinder 3 corresponding to the dehumidification chamber 2-1, and the air outlet pipe 20 is arranged on the side of the outer cylinder 3 corresponding to the crushing chamber 2-3.

[0036] When in use, high-temperature gas is passed into the drying outer chamber 4 through the air inlet pipe 19 to heat the rotor drying cylinder 1, and the material enters the rotor drying cylinder 1 through the feed port 15 and moves directionally along the feed chamber 2-4, the dehumidification chamber 2-1, the blocking chamber 2-2 and the crushing chamber 2-3 under the action of the rotor drying cylinder 1. During the movement, the material exchanges heat with the cylinder wall of the rotor drying cylinder 1 to achieve drying of the material.

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, the rotor drying cylinder 1 in this embodiment includes a frame 1-1, a rotating drive shaft 1-2 connected to the frame 1-1 and driven to rotate by a driving device, an inner cylinder 1-3 surrounded by the outer side of the rotating drive shaft 1-2 and forming a drying chamber 2 between the rotating drive shaft 1-2, and a stirring push rod arranged on the outer side of the rotating drive shaft 1-2 for driving the material to move in a directional manner from the feed port 15 to the discharge port 16. The driving device can be a driving motor that is connected to the rotating drive shaft 1-2 through a coupling and drives the rotating drive shaft 1-2 to rotate.

[0038] Since the materials entering the rotor drying barrel 1 are usually piled up and down, the upper material cannot contact the inner wall of the rotor drying barrel 1 for sufficient heat exchange, which affects the drying speed of the material. In order to solve the above problem, in this embodiment, the stirring push rod includes at least one extension rod 31 arranged on the outside of the rotating drive shaft 1-2, an arc-shaped stratification plate 32 arranged on the extension rod 31 along the rotation trajectory of the outer side of the extension rod 31, and a material distribution guide 33 arranged on the outer side of the arc-shaped stratification plate 32 and in contact with the inner wall of the rotor drying barrel 1. The material distribution guide 33 moves the material to the outside of the rotating plane as the extension rod 31 rotates; specifically, Figure 5 As shown, in this embodiment, a pair of guide surfaces 34 are symmetrically arranged about the front end center position of the material distribution guide part 33, wherein the guide surfaces 34 are gradually inclined toward the outside of the rotation plane from front to back.

[0039] When the extension rod 31 drives the arc-shaped stratification plate 32 and the material distribution guide 33 to rotate, the arc-shaped stratification plate 32 is inserted into the material, so that the upper material is located at the upper end of the arc-shaped stratification plate 32 and is separated from the lower material. At the same time, the front end of the material distribution guide 33 contacts the lower material, so that the lower material is pushed toward the outside of the rotating plane under the action of the guide surface 34, thereby forming a heat exchange space in contact with the inner wall of the rotor drying cylinder 1 at the center of the lower material. During the continuous rotation, the upper material that enters the upper end of the arc-shaped stratification plate 32 falls into the heat exchange space under the push of subsequent materials and contacts the inner wall of the rotor drying cylinder 1 for heat exchange, thereby further accelerating the water loss rate of the upper material, thereby ensuring the drying efficiency of the rotor dryer.

[0040] Furthermore, the rotor dryer in this embodiment indirectly transfers heat to the material through the drying outer chamber 4 and the inner cylinder 1-3, and the material entering the rotor drying cylinder 1 is initially in a fluid or semi-fluid state, so that the material in the rotor drying cylinder 1 is deposited at the bottom of the rotor drying cylinder 1 under the action of gravity, and then continuously absorbs heat from the bottom of the inner cylinder 1-3, so that the temperature of the bottom of the inner cylinder 1-3 drops rapidly, thereby affecting the dehydration and drying effect of the subsequent material.

[0041] like Figure 2 , Figure 3 and Figure 4 As shown, in order to solve the problem that the temperature at the bottom of the inner cylinder 1-3 drops too fast and affects the material drying effect, some stirring push rods are further improved in design in this embodiment; specifically, the stirring push rods in this embodiment also include at least one group of connecting members 5 axially spaced and arranged on the outside of the rotating drive shaft 1-2 and rotating with the rotating drive shaft 1-2, and an auxiliary heat transfer plate 6 is provided on the outside of the connecting member 5. When the auxiliary heat transfer plate 6 rotates to the upper position with the rotating drive shaft 1-2, the auxiliary heat transfer plate 6 is in contact with the inner wall of the upper end of the inner cylinder 1-3 to absorb heat. When the auxiliary heat transfer plate 6 rotates to the lower position with the rotating drive shaft 1-2, the auxiliary heat transfer plate 6 contacts the material at the bottom of the inner cylinder 1-3 for heat exchange, thereby accelerating the evaporation rate of the water in the material inside the inner cylinder 1-3 within the same time.

[0042] Among them, Figure 3 As shown, since the material moves from the feed chamber 2-4 to the crushing chamber 2-3, the auxiliary heat transfer plate 6 in this embodiment is located in the dehumidification chamber 2-1. Since the material in the dehumidification chamber 2-1 is usually in a fluid state, when the material distribution guide 33 stirs the lower layer of material, the material flows back to the heat exchange space at a faster speed, and then the extension rods are arranged at intervals in the blocking chamber. Since the material is usually in a semi-solid state after heat exchange with the auxiliary heat transfer plate 6 in the dehumidification chamber 2-1, the flow speed of the material is relatively slowed down, which facilitates the stirring effect of the material distribution guide 33 on the material.

[0043] Furthermore, a steam outlet 24 is provided at the upper end of the rotor drying cylinder 1 and is connected to the dehumidification chamber 2-1. The stirring push rod also includes a pushing rod 23 located in the feed chamber 2-4, a cutting and blocking rod 17 located in the blocking chamber 2-2, and a crushing rod 18 located in the crushing chamber 2-3. The cutting and blocking rods 17 and the crushing rods 18 are provided in several groups, and several groups of cutting and blocking rods 17 are arranged along the axial direction and staggered with each other on the outside of the rotating drive shaft 1-2. The crushing rod 18 includes a connecting rod 18-1 fixedly connected to the outside of the rotating drive shaft 1-2 and a hammer head 18-2 arranged at the outer end of the connecting rod 18-1.

[0044] Furthermore, Figure 3As shown, that is, in this embodiment, moving from right to left, the material just entering the right side of the rotor drying cylinder 1 has the highest water content, so that the heat loss at the right side of the inner cylinder 1-3 is the fastest, and during use, the right end of the rotor drying cylinder 1 requires more high-temperature gas to heat the inner cylinder 1-3. In this embodiment, an airflow adjustment plate 21 located between the dehumidification chamber 2-1 and the block chamber 2-2 is provided in the drying outer chamber 4. The outer side of the airflow adjustment plate 21 is sealed to the inner wall of the outer cylinder 3 and the inner side is sealed to the outer side of the inner cylinder 1-3. The airflow adjustment plate 21 is provided with an outgoing hole 22 located on the outer side of the lower end of the rotor drying cylinder 1, and the high-temperature airflow entering the outer cylinder 3 is blocked by the airflow adjustment plate 21, so that the high-temperature airflow first fills the part of the drying outer chamber 4 corresponding to the dehumidification chamber 2-1 and then flows to the left through the outgoing hole 22, thereby ensuring a stable heat source in the dehumidification chamber 2-1, and then ensuring the rapid drying of the material in the dehumidification chamber 2-1.

[0045] Embodiment 2

[0046] like Figure 3 As shown, when the auxiliary heat transfer plate 6 is selected to the lower position, the auxiliary heat transfer plate 6 contacts the inner wall of the lower end of the inner cylinder 1-3, so that the material cannot contact the corresponding part of the inner cylinder 1-3.

[0047] like Figure 6 and Fig.10As shown, different from the above-mentioned embodiment 1, in this embodiment, a deformation portion 7 is provided at the lower end of the inner cylinder 1-3, which is located outside the auxiliary heat transfer plate 6 and expands the drying chamber 2 downward; specifically, the deformation portion 7 includes an arc-shaped bottom surface 7-1 at the lower end and connecting surfaces 7-2 arranged on the front and rear sides of the arc-shaped bottom surface 7-1 and connected to the arc-shaped bottom surface 7-1 and the inner cylinder 1-3 respectively; the arc-shaped bottom surface 7-1 in this embodiment is an arc-shaped surface with a diameter larger than the diameter of the original inner cylinder 1-3, so that when the volume of the material poured into the rotor drying cylinder 1 remains unchanged, the contact area between the bottom of the inner cylinder 1-3 and the material is increased, thereby directly accelerating the drying speed of the material; at the same time, since the deformation portion 7 is expanded downward, the auxiliary heat transfer plate 6 rotates to the lower position That is, it is not in contact with the deformation part 7 at the lower end of the inner cylinder 1-3, so that the inner wall of the lower end of the inner cylinder 1-3 can also continuously contact with the material, and thus compared with the rotor drying cylinder 1 in Example 1, the rotor drying cylinder 1 in this embodiment can also further improve the drying speed of the material; at the same time, due to the downwardly expanding deformation part 7, the material accumulation of the inner cylinder 1-3 is also moved downward, and then in this embodiment, when the auxiliary heat transfer plate 6 rotates to the lower end position of the inner side of the inner cylinder 1-3, the high-temperature auxiliary heat transfer plate 6 after absorbing heat will rotate into the middle layer of the material, so that the position where the middle layer of the material cannot contact the inner cylinder 1-3 can also be dried by absorbing heat through the high-temperature auxiliary heat transfer plate 6, thereby further improving the drying speed inside the middle layer of the material.

[0048] Furthermore, in order to adjust the drying time and discharge speed of the material in the rotor drying cylinder 1 and ensure the smooth movement of the material in the rotor drying cylinder 1, as Figure 6 As shown, in this embodiment, an angle adjuster 8 for adjusting the axial inclination angle of the rotor drying cylinder 1 is provided on the frame 1-1. When in use, the angle adjuster 8 is used to raise one side of the feed port 15 on the rotor drying cylinder 1, thereby facilitating the movement of the material from the feed port 15 of the rotor drying cylinder 1 to the discharge port 16; specifically, in this embodiment, a bottom plate 25 is provided at the lower end of the rotor drying cylinder 1, and a fixing plate 26 rotatably connected to the bottom plate 25 on the discharge end side of the rotor drying cylinder 1 is provided at the lower end of the bottom plate 25, and a mounting groove 27 is provided on the inner side of the upper end of the fixing plate 26, and a fixing plate 26 is provided at the lower end of the bottom plate 25. The accommodating groove 30, wherein the angle adjuster 8 includes a hydraulic push rod 28 installed in the installation groove 27 and a height adjustment rod 29 rotatably connected to the piston end of the hydraulic push rod 28. In this embodiment, one end of the height adjustment rod 29 is connected to the piston end of the hydraulic push rod 28, and the other end is rotatably connected in the accommodating groove 30; when adjusting, the hydraulic push rod 28 works so that the piston end of the hydraulic push rod 28 extends to drive the lower end of the height adjustment rod 29 to move outward, thereby making the rotor drying cylinder 1 and the bottom plate 25 installed under the action of the height adjustment rod 29 so that the feed end is gradually raised to the corresponding position.

[0049] like Figure 6 , Figure 7 and Fig. 9 As shown, since the lower end of the inner cylinder 1-3 in this embodiment is provided with a deformation portion 7 that expands downward, and the corresponding connecting piece 5 and the auxiliary heat transfer plate 6 cannot directionally drive the material at the lower end of the deformation portion 7, the auxiliary heat transfer plate 6 in this embodiment is provided with a bottom driving plate 9 that can move inward and outward relative to the auxiliary heat transfer plate 6, and the bottom driving plate 9 is inclined relative to the rotation plane of the rotating drive shaft 1-2; during use, when the auxiliary heat transfer plate 6 is located at the lower end, the bottom driving plate 9 moves outward to a position close to the deformation portion 7, so that the bottom driving plate 9 protrudes out of the auxiliary heat transfer plate 6, and then the auxiliary heat transfer plate 6 drives the bottom driving plate 9 to rotate, thereby directionally driving the material at the lower end of the deformation portion 7, and when the auxiliary heat transfer plate 6 rotates upward, the bottom driving plate 9 gradually retracts inward, thereby avoiding contact and limiting with the inner wall of the upper end of the inner cylinder 1-3; specifically, as Figure 7 , Figure 8 and Fig. 9 As shown, in this embodiment, a movable channel 10 is opened on the auxiliary heat transfer plate 6, and the movable channel 10 is arranged through the auxiliary heat transfer plate 6. The bottom driving plate 9 includes a driving plate main body 9-1 that is movably connected inside and outside in the movable channel 10, an external limiting part 9-2 arranged at the outer end of the driving plate main body 9-1, and a counterweight stripping part 9-3 arranged at the inner end of the driving plate main body 9-1. A scraping part 11 corresponding to the movable channel 10 is arranged on the outer side of the driving plate main body 9-1; the scraping part 11 in this embodiment can be bristles arranged on the outer side of the driving plate main body 9-1.

[0050] When the auxiliary heat transfer plate 6 rotates downward, the driving plate body 9-1 moves outward under the action of gravity of the counterweight stripping part 9-3, and the connecting surface 7-2 in the present embodiment is expanded outward, and an auxiliary space 12 for the bottom driving plate 9 to slide outward is provided between the connecting surface 7-2 and the auxiliary heat transfer plate 6, and then when the auxiliary heat transfer plate 6 rotates to the position corresponding to the auxiliary space 12, the bottom driving plate 9 on the auxiliary heat transfer plate 6 can slide outward to a certain length, and then the bottom driving plate 9 is in an extended state when the auxiliary heat transfer plate 6 rotates into the material, thereby ensuring the directional driving of the bottom material of the deformation part 7 by the bottom driving plate 9.

[0051] Furthermore, if Figure 8As shown, in this embodiment, in order to facilitate the auxiliary heat transfer plate 6 to completely fit with the upper inner wall of the inner cylinder 1-3 to absorb heat when it rotates to the upper end, a hidden groove 13 corresponding to the outer limit portion 9-2 is opened on the outer side of the auxiliary heat transfer plate 6, and the depth of the hidden groove 13 is the same as the thickness of the outer limit portion 9-2, so that when the auxiliary heat transfer plate 6 rotates to the upper end, the outer limit portion 9-2 can enter the hidden groove 13; at the same time, in this embodiment, a conical discharge channel 14 connected to the active channel 10 is provided at the bottom of the hidden groove 13, so that in the process of the outer limit portion 9-2 entering the hidden groove 13, the material in the hidden groove 13 can be squeezed into the active channel 10 through the conical discharge channel 14, and then scraped from the active channel 10 by the scraping portion 11 to avoid limiting the outer limit portion 9-2.

[0052] Furthermore, this embodiment also provides a method for using an indirect rotor dryer, comprising the following steps:

[0053] Step 1: start the angle adjuster 8 to adjust the unloaded rotor drying cylinder 1 to the corresponding working angle according to the use requirements; pass the high-temperature gas into the drying outer chamber 4 of the outer cylinder 3 through the air inlet pipe 19 to preheat the rotor drying cylinder 1;

[0054] Step 2: Start the driving device to drive the rotating drive shaft 1-2 to rotate, and pour the material to be dried from the feed port 15 of the rotor drying cylinder 1. The material enters the feed chamber 2-4 through the feed port 15 and is located at the lower end of the feed chamber 2-4 and is pushed into the dehumidification chamber 2-1 under the action of the push rod 23; when the material enters the dehumidification chamber 2-1, the lower end contacts the high-temperature inner wall of the inner cylinder 1-3, so that the moisture in the material absorbs heat and evaporates and is discharged from the steam outlet 24 at the upper end; at the same time, the auxiliary heat transfer plate 6 rotates under the action of the rotating drive shaft 1-2. When the auxiliary heat transfer plate 6 rotates to the upper end, the auxiliary heat transfer plate 6 gradually approaches the high-temperature inner wall of the inner cylinder 1-3 until it is in contact with the inner cylinder 1-3, thereby achieving auxiliary The heat transfer plate 6 absorbs heat during the heat absorption process. Under the gravity of the counterweight stripping part 9-3, the bottom driving plate 9 moves inward relative to the auxiliary heat transfer plate 6, thereby ensuring that the auxiliary heat transfer plate 6 is in full contact with the inner wall of the inner cylinder 1-3. When the auxiliary heat transfer plate 6 gradually rotates to the lower end, the auxiliary heat transfer plate 6 rotates into the middle layer of the material, thereby further transferring the heat on the auxiliary heat transfer plate 6 to the material, thereby completing the heat release process and accelerating the heat absorption speed of the material. During the above-mentioned heat release process, the bottom driving plate 9 moves outward relative to the auxiliary heat transfer plate 6 under the gravity of the counterweight stripping part 9-3, thereby allowing the material at the lower end of the dehumidification chamber 2-1 to move toward the side of the discharge port 16 under the action of the rotating bottom driving plate 9.

[0055] Step 3: After the material is dehumidified by the dehumidification chamber 2-1, it enters the block chamber 2-2. At this time, most of the moisture in the material is heated and evaporated to begin to agglomerate. When the material moves to the position outside the extension rod 31, the extension rod 31 drives the arc-shaped layering plate 32 and the material distribution guide 33 to rotate. When the material distribution guide 33 rotates downward and contacts the material, the arc-shaped layering plate 32 is inserted into the upper material so that the upper material is separated from the lower material and enters the inner side of the arc-shaped layering plate 32. At the same time, the lower material after separation contacts the material distribution guide 33. , the lower layer of materials is pushed to the outside of the rotating plane under the action of the guide surface 34, and then a heat exchange space with the inner wall of the rotor drying cylinder 1 exposed is formed at the position of the original lower layer of materials. The upper layer of materials moves backward relative to the arc-shaped layering plate 32 during the continuous rotation of the extension rod 31, and then falls into the heat exchange space to contact and exchange heat with the inner wall of the rotor drying cylinder 1; at the same time, the cutting and blocking rod 17 in the blocking chamber 2-2 rotates to cut and block the agglomerated materials after entering the blocking chamber 2-2, so that the large block materials are cut and dispersed into a plurality of small blocks of materials;

[0056] Step 4: The small pieces of material cut by the block dividing chamber 2 - 2 enter the crushing chamber 2 - 3 , and the rotating crushing rod 18 in the crushing chamber 2 - 3 hits and crushes the small pieces of material, and the crushed dried material falls out from the discharge port 16 .

[0057] Certain words are used in the specification and claims of the present invention to refer to specific products. It should be understood by those skilled in the art that manufacturers may refer to the same component by different names. It is not intended to distinguish between components that have the same function but different names. In the following specification and patent scope, the words "comprise", "have" and "include" are open-ended words and should be interpreted as "including but not limited to...".

[0058] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An indirect rotor dryer, comprising a rotor drying cylinder (1), wherein a drying chamber (2) for placing materials is provided in the rotor drying cylinder (1), wherein the drying chamber (2) is provided for placing materials, and wherein: The outer side of the rotor drying cylinder (1) is sealedly connected to an outer cylinder (3), and a drying outer chamber (4) for introducing high-temperature gas is formed between the outer cylinder (3) and the rotor drying cylinder (1). The rotor drying cylinder (1) comprises a frame (1-1), a rotating drive shaft (1-2) connected to the frame (1-1) and driven to rotate by a driving device, an inner cylinder (1-3) arranged outside the rotating drive shaft (1-2) and forming the drying chamber (2) between the rotating drive shaft (1-2), and a stirring push rod arranged outside the rotating drive shaft (1-2) and used for driving the material to move in a directional manner; The stirring push rod comprises at least one extension rod (31) arranged outside the rotating drive shaft (1-2), an arc-shaped stratification plate (32) arranged on the extension rod (31) along the rotation trajectory outside the extension rod (31), and a material distribution guide portion (33) arranged outside the arc-shaped stratification plate (32) and in contact with the inner wall of the rotor drying cylinder (1), wherein the material distribution guide portion (33) is provided with a guide surface (34), and when the extension rod (31) drives the arc-shaped stratification plate (32) and the material distribution guide portion (33) to rotate, the guide surface (34) on the material distribution guide portion (33) moves the material on the inner wall of the rotor drying cylinder (1) to the outside of the rotation plane to form a heat exchange space in contact with the inner wall of the rotor drying cylinder (1) at the center position, and the arc-shaped stratification plate (32) is inserted into the material so that the upper layer of the material is separated from the lower layer of the material and falls into the heat exchange space to perform contact heat exchange with the inner wall of the rotor drying cylinder (1).

2. The indirect rotor dryer according to claim 1, characterized in that: The stirring push rod further comprises at least one group of connecting members (5) which are axially spaced apart and arranged outside the rotating drive shaft (1-2) and rotate along with the rotating drive shaft (1-2); an auxiliary heat transfer plate (6) which is arranged on the outside of the connecting member (5) and is fitted with the inner wall of the upper end of the inner cylinder (1-3).

3. The indirect rotor dryer according to claim 2, characterized in that: The lower end of the inner cylinder (1-3) is provided with a deformation portion (7) located outside the auxiliary heat transfer plate (6) and arranged to expand the drying chamber (2) downwards, the deformation portion (7) comprising an arc-shaped bottom surface (7-1) arranged at the lower end in an arc shape, and connecting surfaces (7-2) arranged at the front and rear sides of the arc-shaped bottom surface (7-1) and respectively connected to the arc-shaped bottom surface (7-1) and the inner cylinder (1-3), and the frame (1-1) is provided with an angle adjuster (8) for adjusting the axial tilt angle of the rotor drying cylinder (1).

4. The indirect rotor dryer according to claim 3 is characterized in that: The auxiliary heat transfer plate (6) is provided with a bottom drive plate (9) that can move inward and outward relative to the auxiliary heat transfer plate (6), and the bottom drive plate (9) is arranged to be inclined relative to the rotation plane of the rotation drive shaft (1-2).

5. The indirect rotor dryer according to claim 4, characterized in that: The auxiliary heat transfer plate (6) is provided with a movable channel (10), the bottom driving plate (9) comprises a driving plate body (9-1) movably connected inside and outside the movable channel (10), an outer limiting portion (9-2) arranged at the outer end of the driving plate body (9-1), and a counterweight stripping portion (9-3) arranged at the inner end of the driving plate body (9-1), and a scraping portion (11) arranged corresponding to the movable channel (10) is provided on the outer side of the driving plate body (9-1).

6. The indirect rotor dryer according to claim 5, characterized in that: The connection surface (7-2) is arranged to expand outwards, and an auxiliary space (12) for the bottom drive plate (9) to slide outwards is provided between the connection surface (7-2) and the auxiliary heat transfer plate (6).

7. The indirect rotor dryer according to claim 4, characterized in that: The auxiliary heat transfer plate (6) is provided with a hidden groove (13) on the outside thereof and arranged corresponding to the outer limiting portion (9-2); the depth of the hidden groove (13) is the same as the thickness of the outer limiting portion (9-2); and a conical discharge channel (14) is provided at the bottom of the hidden groove (13) and is connected to the movable channel (10).

8. The indirect rotor dryer according to claim 6, characterized in that: A feed port (15) is provided on the upper side of one axial end of the rotor drying cylinder (1), and a discharge port (16) is provided on the lower side of the other axially opposite end of the rotor drying cylinder (1). The drying chamber (2) comprises a feed chamber (2-4) arranged in the rotor drying cylinder (1) on the side close to the feed port (15), a dehumidification chamber (2-1) connected to the feed chamber (2-4), a block chamber (2-2) connected to the dehumidification chamber (2-1), and a crushing chamber (2-3) connected to the block chamber (2-2). The auxiliary heat transfer plate (6) is located in the dehumidification chamber (2-1), and the extension rod (31) is arranged at intervals in the block chamber (2-2). The upper end of the rotor drying cylinder (1) is provided with a The dehumidification chamber (2-1) is connected to a steam outlet (24), and the stirring push rod also includes a push rod (23) located in the feed chamber (2-4), a cutting and segmenting rod (17) located in the segmenting chamber (2-2), and a crushing rod (18) located in the crushing chamber (2-3). The cutting and segmenting rod (17) and the crushing rod (18) are each provided with a plurality of groups, and the plurality of groups of cutting and segmenting rods (17) are arranged along the axial direction and staggered with each other on the outside of the rotating drive shaft (1-2). The crushing rod (18) includes a connecting rod (18-1) fixedly connected to the outside of the rotating drive shaft (1-2), and a hammer head (18-2) arranged at the outer end of the connecting rod (18-1).

9. The indirect rotor dryer according to claim 8, characterized in that: An air inlet pipe (19) communicating with the drying outer chamber (4) is provided on a side of the outer cylinder (3) corresponding to the dehumidification chamber (2-1), and an air outlet pipe (20) communicating with the drying outer chamber (4) is provided on a side of the outer cylinder (3) corresponding to the crushing chamber (2-3). An air flow regulating plate (21) located between the dehumidification chamber (2-1) and the block separation chamber (2-2) is provided in the drying outer chamber (4). The air flow regulating plate (21) is sealedly connected to the inner wall of the outer cylinder (3) on the outside and sealedly connected to the outside of the inner cylinder (1-3) on the inside. The air flow regulating plate (21) is provided with an outlet hole (22) located on the outside of the lower end of the rotor drying cylinder (1).

10. The method for using the indirect rotor dryer according to claim 9, comprising the following steps: Step 1: according to the use requirements, the angle adjuster (8) is activated to adjust the unloaded rotor drying cylinder (1) to a corresponding working angle; high-temperature gas is introduced into the drying outer chamber (4) of the outer cylinder (3) through the air inlet pipe (19) to preheat the rotor drying cylinder (1); Step 2: Start the driving device to drive the rotating drive shaft (1-2) to rotate, and pour the material to be dried from the feed port (15) of the rotor drying cylinder (1). The material enters the feed chamber (2-4) through the feed port (15) and is located at the lower end of the feed chamber (2-4) and is pushed into the dehumidification chamber (2-1) under the action of the push rod (23); when the material enters the dehumidification chamber (2-1), the lower end contacts the high-temperature inner wall of the inner cylinder (1-3), so that the moisture in the material absorbs heat and evaporates and is discharged from the steam outlet (24) at the upper end; at the same time, the auxiliary heat transfer plate (6) rotates under the action of the rotating drive shaft (1-2). When the auxiliary heat transfer plate (6) rotates to the upper end, the auxiliary heat transfer plate (6) gradually approaches the high-temperature inner wall of the inner cylinder (1-3) until it is in close contact with the inner cylinder (1-3), thereby achieving The auxiliary heat transfer plate (6) absorbs heat during the heat absorption process. During the heat absorption process, the bottom driving plate (9) moves inward relative to the auxiliary heat transfer plate (6) under the action of gravity of the counterweight stripping portion (9-3), thereby ensuring that the auxiliary heat transfer plate (6) is in full contact with the inner wall of the inner cylinder (1-3); when the auxiliary heat transfer plate (6) gradually rotates to the lower end, the auxiliary heat transfer plate (6) rotates into the middle layer of the material, thereby further transferring the heat on the auxiliary heat transfer plate (6) to the material, thereby completing the heat release process and accelerating the heat absorption speed of the material. During the above-mentioned heat release process, the bottom driving plate (9) moves outward relative to the auxiliary heat transfer plate (6) under the action of gravity of the counterweight stripping portion (9-3), thereby allowing the material at the lower end of the dehumidification chamber (2-1) to move toward the side of the discharge port (16) under the action of the rotating bottom driving plate (9); Step 3: After the material is dehumidified in the dehumidification chamber (2-1), it enters the block chamber (2-2). At this time, most of the moisture in the material is heated and evaporated to start agglomeration. When the material moves to the position outside the extension rod (31), the extension rod (31) drives the arc-shaped layering plate (32) and the material distribution guide (33) to rotate. When the material distribution guide (33) rotates downward and contacts the material, the arc-shaped layering plate (32) is inserted into the upper layer of the material so that the upper layer of the material is separated from the lower layer of the material and enters the upper end of the arc-shaped layering plate (32). At the same time, the lower layer of the material after separation contacts the material distribution guide (33). The lower layer of material is moved toward the outside of the rotating plane under the action of the guide surface (34), thereby forming a heat exchange space with the inner wall of the rotor drying cylinder (1) exposed at the position of the original lower layer of material. The upper layer of material moves backward relative to the arc-shaped layering plate (32) during the continuous rotation of the extension rod (31) and then falls into the heat exchange space to contact and exchange heat with the inner wall of the rotor drying cylinder (1). At the same time, the cutting and segmenting rod (17) in the segmenting cavity (2-2) rotates to cut and segment the agglomerated material after entering the segmenting cavity (2-2), thereby cutting and dispersing the large block of material into a plurality of small blocks of material. Step 4: The small pieces of material cut by the dividing chamber (2-2) enter the crushing chamber (2-3), and the rotating crushing rod (18) in the crushing chamber (2-3) hits and crushes the small pieces of material, and the crushed dried material falls out from the discharge port (16).

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