Waste heat recovery device for rotary flash dryer

Abstract

The utility model discloses a waste heat recovery device for a rotary flash dryer, and relates to the technical field of waste heat recovery. The device comprises a recovery pipe, the recovery pipe is in threaded connection with a hollow column in an elastic piece in the abutting assembly through the mounting hole, a spring is further placed in the hollow column, the hollow column is further in sliding insertion connection with one shaft end of the solid column, a sliding groove is further formed in the shaft end of the recovery pipe, and the recovery pipe is in sliding insertion connection with a sliding insertion plate in the extension assembly through the sliding groove; the fixing plate is further detachably and fixedly connected with the shaft end of one side of the folding plate, a telescopic rod is further arranged in the folding plate, and the bottom side wall of the recycling pipe is further fixedly connected with a fixing frame in the air supply assembly through bolts. By means of the abutting assembly and the two half-piece recycling pipes, the recycling pipes can be conveniently assembled on the outer side of the drying pipeline of the rotary flash evaporation drying machine, the distance between the two half-piece recycling pipes can be adjusted through the extending assembly, and therefore the recycling pipe is suitable for the drying pipelines of the rotary flash evaporation drying machines with different calibers.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat recovery, in particular to a waste heat recovery device for a rotary flash drying machine. Background Art

[0002] The rotary flash dryer introduces hot air into the mixing and crushing drying chamber from the bottom of the dryer through the inlet pipe at an appropriate jet speed, which produces strong shear, collision and friction on the material, causing it to be micronized, thereby enhancing mass transfer and heat transfer. The rotary flash dryer will generate a large amount of waste heat during the drying process, and this waste heat is mostly recovered by a heat exchanger or directly dissipated into the surrounding environment through the rotary flash dryer casing.

[0003] A Chinese patent application (or patent) with publication number CN213208584U discloses a drying device, specifically a waste heat recovery device for a rotary flash dryer. The waste heat recovery device for a rotary flash dryer includes a combustion chamber connected to a dryer via a pipeline. The top of the dryer is connected to a cyclone separator via a dryer pipeline. The cyclone separator is connected to a bag filter via a cyclone separator pipeline. The outlet of the bag filter is connected to an exhaust pipeline. A heat recovery pipeline I is provided outside the exhaust pipeline, and a heat recovery pipeline II is provided outside the dryer pipeline. Blowers are provided at the inlets of both heat recovery pipelines I and II. The outlets of both heat recovery pipelines I and II are connected to the inlet of the combustion chamber via pipelines. A blower is provided in the combustion chamber. This waste heat recovery device utilizes the heat of the hot air discharged from the rotary flash dryer, complying with industrial policies for energy conservation and environmental protection.

[0004] The above-mentioned waste heat recovery device of a rotary flash dryer is provided with two heat recovery pipes, and a gap is set between the two heat recovery pipes. The room temperature gas in the gap is continuously blown by the action of a blower. However, the diameters of the drying pipes on different conveying sections of the rotary flash dryer are also different, and the diameter of the heat recovery pipe is not adjustable. Therefore, it can only be applied to drying pipes of a specific diameter, which leads to a narrow application range. In addition, the high-speed airflow will also accelerate the loss of heat in this part, resulting in a problem of very little actual heat recovery. In addition, there are two heat recovery pipes, and a gap needs to be set between the two heat recovery pipes. The heat recovery pipe located on the inner side also needs to be sleeved on the outside of the drying pipe, which makes actual assembly difficult. To this end, we provide a waste heat recovery device for a rotary flash dryer to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of the present utility model is to provide a waste heat recovery device for a rotary flash dryer. By utilizing an abutment assembly and two half-piece recovery pipes, the recovery pipe is more easily assembled on the outside of the drying duct of the rotary flash dryer. The spacing between the two half-piece recovery pipes can then be adjusted by an extension assembly, thereby making it suitable for drying ducts of rotary flash dryers with different calibers, thereby solving the problems encountered in the above-mentioned waste heat recovery device for a rotary flash dryer.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model provides a waste heat recovery device for a rotary flash dryer, comprising a recovery pipe; a mounting hole is provided in the side wall of the recovery pipe, the recovery pipe is threadedly connected to the hollow column in the elastic member in the abutment assembly through the mounting hole, a spring is also placed inside the hollow column, and the hollow column is also slidably connected to one axial end of the solid column, the other axial end of the solid column is connected to the abutment plate through a connecting piece, a sliding groove is also provided on the axial end of the recovery pipe, and the recovery pipe is slidably plugged with the sliding plug plate in the extension assembly through the sliding groove, the other side of the sliding plug plate is connected to the fixing plate through a connecting shaft, and the fixing plate is also detachably fixed to one side axial end of the folding plate, a telescopic rod is also provided inside the folding plate, and the bottom side wall of the recovery pipe is also fixedly connected to the fixing bracket in the air supply assembly by bolts, a fan is installed inside the fixing bracket, and a fan blade is installed at the shaft end of the fan.

[0008] The utility model is further configured such that the recovery pipe is configured in a semicircular columnar structure, two recovery pipes are provided in total, the two recovery pipes are arranged opposite to each other, and the axial ends of the two recovery pipes are connected to each other through an extension component.

[0009] The utility model is further configured such that a pipe groove is opened in the side wall of the recovery pipe, and an insulation board is installed in the pipe groove; the bottoms of the two recovery pipes are equipped with air supply components, and the air outlets of the air supply components are both facing one side of the center of the recovery pipe.

[0010] The present invention is further configured such that a plurality of abutment assemblies are provided, and the plurality of abutment assemblies are arranged at equal intervals, the abutment plates in the abutment assemblies are arranged in an arc-shaped plate-like structure, and a heat conducting plate is embedded on the arc-shaped inner wall of the abutment plate, and the abutment plate contacts the outer wall of the drying pipe of the rotary flash dryer through the heat conducting plate.

[0011] The present invention is further configured such that the extension components are provided in two groups, the two groups of extension components are respectively provided at the two axial ends of the recovery pipe, and the folding plates in the extension components are provided in a hollow structure.

[0012] The utility model is further configured such that a fixed plate and a sliding plate are provided on both side shaft ends of the folding plate, and the outer wall of the sliding plate facing the folding plate is detachably fixedly connected to one side shaft end of the telescopic rod, and the other side shaft end of the telescopic rod is detachably fixedly connected to the other sliding plate.

[0013] The present invention is further configured such that a plurality of telescopic rods are provided, and the plurality of telescopic rods are vertically and horizontally arranged in parallel, and are evenly spaced from one another, and the telescopic rods are electrically controlled telescopic rod structures.

[0014] The utility model is further configured such that the inner side wall of the fixing frame in the air supply assembly is detachably fixed to the frame by bolts, and a fan is clamped inside the frame, and a wind cover is welded on the bottom side wall of the fixing frame on the side of the central axis surface of the recovery pipe, and the wind cover is a spherical structure with one quarter hollow.

[0015] The utility model has the following beneficial effects:

[0016] The utility model provides two recovery pipes in total by arranging a recovery pipe and an abutment assembly. The two recovery pipes are arranged opposite to each other to form a complete heat recovery pipe. During assembly, it is only necessary to place the two half-pieces of the recovery pipe on the outside of the drying pipe of the rotary flash dryer, and then push the two recovery pipes gradually close to the drying pipe of the rotary flash dryer. At this time, the recovery pipe is abutted against the outer wall of the drying pipe of the rotary flash dryer through the abutment assembly, and then the extension assembly is inserted to complete the installation of the entire recovery pipe.

[0017] The utility model is provided with a recovery tube and an extension component. The extension component is slidably inserted on the two axial ends of the recovery tube. The folding plate in the extension component can achieve two effects of extension and contraction and folding under the action of the telescopic rod inside it. When it is extended, the recovery tubes on both sides also move away from each other, and vice versa, they move closer to each other, which can drive the two recovery tubes to move closer or farther away from each other, thereby achieving the purpose of adjusting the size of the chamber surrounded by the two recovery tubes.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 Schematic diagram of the structure of the waste heat recovery device for the rotary flash dryer Figure 1 .

[0021] Figure 2 Schematic diagram of the structure of the waste heat recovery device for the rotary flash dryer Figure 2 .

[0022] Figure 3 This is an exploded view of the recovery tube and abutment assembly.

[0023] Figure 4 This is a structural disassembly diagram of the extension component.

[0024] Figure 5 This is a structural disassembly diagram of the air supply component.

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0026] 1-recovery pipe, 101-pipe groove, 102-slide groove, 103-mounting hole, 104-insulation plate, 2-abutment assembly, 201-elastic part, 201a-hollow column, 201b-spring, 201c-solid column, 201d-connecting piece, 202-abutment plate, 203-heat conduction plate, 3-extension assembly, 301-sliding plate, 302-connecting shaft, 303-fixed plate, 304-folding plate, 305-telescopic rod, 4-air supply assembly, 401-fixed frame, 401a-wind hood, 402-frame, 403-fan, 404-fan blades. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0028] Example 1, please refer to Figure 1-3 The utility model is a waste heat recovery device for a rotary flash dryer, comprising a recovery pipe 1. By utilizing the abutment component 2 on the inner wall of the recovery pipe 1, two assembled recovery pipes 1 can be abutted against the outer wall of the drying pipe of the rotary flash dryer, thereby achieving the purpose of positioning the recovery pipe 1 for installation.

[0029] Specifically, a pipe groove 101 is opened in the side wall of the recovery pipe 1, and an insulation plate 104 is embedded in the pipe groove 101. A mounting hole 103 is opened on the inner wall of the recovery pipe 1, and the recovery pipe 1 is connected to the elastic member 201 in the abutment assembly 2 through the mounting hole 103. The elastic member 201 includes a hollow column 201a threadedly connected to the mounting hole 103, and a spring 201b arranged in the hollow column 201a. At the same time, a solid column 201c is slidably inserted on the hollow column 201a, and the axial end of the solid column 201c is also connected to the abutment plate 202 through a connecting piece 201d. A heat conducting plate 203 is embedded on the outer wall of the abutment plate 202.

[0030] Furthermore, there are two recovery pipes 1, which are arranged opposite to each other, and the recovery pipes 1 are arranged in a semicircular columnar structure. At the same time, there are multiple abutment components 2 on the inner wall of the recovery pipe 1, and the multiple abutment components 2 are arranged at equal intervals. The abutment plate 202 in the abutment component 2 contacts the outer wall of the drying pipe of the rotary flash dryer through the heat conduction plate 203.

[0031] The operating process of this embodiment is as follows: when in use, the recovery pipe 1 is close to the drying pipe of the rotary flash dryer and placed beside it, and then the recovery pipe 1 is pushed to gradually approach the drying pipe of the rotary flash dryer. At this time, the abutment plate 202 is subjected to force, forcing the solid column 201c to press against the spring 201b and shrink into the solid column 201a. Then the extension component 3 is assembled, and the extension component 3 pulls the recovery pipes 1 at both ends close to each other, so that the recovery pipe 1 can be fixed to the outside of the drying pipe of the rotary flash dryer. Then, when the rotary flash dryer is working, its excess heat will be dissipated to the outside through its drying pipe. At the same time, the heat conduction plate 203 can also conduct heat more quickly, and conduct the heat in the side wall of the drying pipe into the chamber surrounded by the recovery pipe 1.

[0032] Example 2, please refer to Figure 4 On the basis of Example 1, an extension component 3 is further provided. By utilizing the cooperation of the folding plate 304 and the telescopic rod 305, the distance between the two recovery pipes 1 can be expanded and extended, thereby achieving applicability to drying pipes of various rotary flash dryers with different calibers.

[0033] Specifically, the extension component 3 includes a sliding plate 301 that is slidably inserted on the recovery pipe 1. The sliding plate 301 is also detachably fixed to the fixed plate 303 through a connecting shaft 302. A folding plate 304 with a hollow structure is bonded to the fixed plate 303, and a telescopic rod 305 is also provided in the chamber between the folding plates 304.

[0034] Furthermore, there are two groups of extension components 3, which are respectively installed at the two axial ends of the recovery tube 1, and a slide groove 102 is opened in the axial end of the recovery tube 1, and the recovery tube 1 is plugged into the sliding plate 301 through the slide groove 102. At the same time, a fixed plate 303 and a sliding plate 301 are provided at both ends of the folding plate 304 in the extension component 3, and the two fixed plates 303 are connected by a telescopic rod 305.

[0035] The operating process of this embodiment is: when in use, align the sliding plate 301 on one end of the folding plate 304 with the slide groove 102 on one recovery tube 1 and insert it therein, and then align the other end of the folding plate 304 with the slide groove 102 on the other recovery tube 1 and insert it therein, so that the extension component 3 can be transferred between the two recovery tubes 1. After assembling another set of extension components 3, the two recovery tubes 1 can be assembled. When it is necessary to adjust the size of the chamber enclosed by the recovery tubes 1, the telescopic rod 305 is extended to push the folding plate 304 to unfold, thereby making the two sliding plates 301 in the extension component 3 move away from each other, that is, the chamber enclosed by the recovery tubes 1 is completely expanded, and vice versa.

[0036] Example 3, please refer to Figure 5 On the basis of Examples 1 and 2, an air supply component 4 is further provided. By utilizing the air supply component 4 installed at the bottom of the recovery pipe 1, air can be supplied to the gap between the recovery pipe 1 and the drying pipe of the rotary flash dryer, thereby accelerating the gas flow rate, so that the high-temperature gas can reach the tail section more quickly.

[0037] Specifically, the air supply assembly 4 includes a fixing frame 401 fixedly installed at the bottom of the recovery pipe 1, and a wind cover 401a is welded on the bottom outer wall of the fixing frame 401. At the same time, the interior of the fixing frame 401 is connected to the frame 402 by bolts, and the interior of the frame 402 is clamped with a fan 403, and the shaft end of the fan 403 is installed with a fan blade 404.

[0038] Furthermore, the wind hood 401a is set in a quarter hollow spherical structure, and the wind hood 401a is set on the side close to the central axis of the recovery pipe 1. At the same time, the air outlet position of the wind hood 401a is set upward. There are two air supply components 4, which are respectively installed at the bottom of the two recovery pipes 1.

[0039] The operating process of this embodiment is as follows: when in use, the fan 403 works, and it will rotate the fan blades 404 on the shaft end, thereby accelerating the gas flow rate, and this part of the high-speed airflow is drawn from the outside of the fixed frame 401 to the side where the wind cover 401a is located, and under the blocking and guidance of the wind cover 401a, the direction of the high-speed airflow is changed from horizontal to vertical, and then blown in from the bottom of the recovery pipe 1, thereby accelerating the gas flow rate in the chamber surrounded by the recovery pipe 1.

[0040] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0041] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A waste heat recovery device for a rotary flash dryer, comprising a recovery pipe (1); characterized in that: A mounting hole (103) is provided in the side wall of the recovery tube (1), and the recovery tube (1) is threadedly connected to the hollow column (201a) in the elastic member (201) in the abutment assembly (2) through the mounting hole (103). A spring (201b) is also placed inside the hollow column (201a), and the hollow column (201a) is also slidably connected to one axial end of the solid column (201c). The other axial end of the solid column (201c) is connected to the abutment plate (202) through a connecting piece (201d). A sliding groove (102) is also provided on the axial end of the recovery tube (1), and the recovery tube (1) is connected to the abutment plate (202) through the sliding groove ( 102) is slidably plugged into a sliding plate (301) in the extension assembly (3), the other side of the sliding plate (301) is connected to a fixed plate (303) via a connecting shaft (302), and the fixed plate (303) is also detachably fixedly connected to one side shaft end of the folding plate (304), and a telescopic rod (305) is further provided inside the folding plate (304), and the bottom side wall of the recovery pipe (1) is also fixedly connected to a fixing frame (401) in the air supply assembly (4) via bolts, a fan (403) is installed inside the fixing frame (401), and a fan blade (404) is installed at the shaft end of the fan (403).

2. The waste heat recovery device for a rotary flash dryer according to claim 1, characterized in that: The recovery pipe (1) is provided in a semicircular columnar structure. There are two recovery pipes (1) in total. The two recovery pipes (1) are arranged opposite to each other, and the axial ends of the two recovery pipes (1) are connected to each other via an extension component (3).

3. The waste heat recovery device for a rotary flash dryer according to claim 1, characterized in that: A pipe groove (101) is provided in the side wall of the recovery pipe (1), and a heat-insulating plate (104) is installed in the pipe groove (101). The bottoms of the two recovery pipes (1) are both equipped with air supply components (4), and the air outlets of the air supply components (4) are both oriented toward one side of the center of the recovery pipe (1).

4. The waste heat recovery device for a rotary flash dryer according to claim 1, characterized in that: The abutment components (2) are provided in a plurality of groups, and the abutment components (2) are provided at equal intervals. The abutment plates (202) in the abutment components (2) are provided in an arc-shaped plate-like structure, and a heat conducting plate (203) is embedded on the arc-shaped inner wall of the abutment plate (202). The abutment plate (202) contacts the outer wall of the drying pipe of the rotary flash dryer through the heat conducting plate (203).

5. The waste heat recovery device for a rotary flash dryer according to claim 1, characterized in that: Two groups of the extension components (3) are provided in total. The two groups of the extension components (3) are respectively provided at the two axial ends of the recovery pipe (1). The folding plates (304) in the extension components (3) are provided in a hollow structure.

6. The waste heat recovery device for a rotary flash dryer according to claim 5, characterized in that: A fixed plate (303) and a sliding plate (301) are provided on both side shaft ends of the folding plate (304), and an outer wall of the sliding plate (301) facing the folding plate (304) is detachably fixedly connected to one side shaft end of the telescopic rod (305), and the other side shaft end of the telescopic rod (305) is detachably fixedly connected to another sliding plate (301).

7. The waste heat recovery device for a spin flash dryer according to claim 6, characterized in that: A plurality of telescopic rods (305) are provided, and the plurality of telescopic rods (305) are arranged in parallel up and down, and are also arranged at equal intervals between the plurality of telescopic rods (305). The telescopic rods (305) are electrically controlled telescopic rod structures.

8. The waste heat recovery device for a spin flash dryer according to claim 1, characterized in that: The inner side wall of the fixing frame (401) in the air supply assembly (4) is detachably fixedly connected to the frame (402) by bolts, and a fan (403) is provided inside the frame (402). A wind shield (401a) is welded to the bottom side wall of the fixing frame (401) on the side of the central axis surface facing the recovery pipe (1), and the wind shield (401a) is provided in the form of a quarter-hollow spherical structure.

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