Dryer

Abstract

The utility model relates to the field of drying devices, in particular to a drying machine which comprises a barrel, a stirring mechanism and a heating coil. A drying cavity is formed in the barrel body, the drying cavity is divided into a plurality of relatively independent drying gaps by a stirring mechanism along the axis of the barrel body, any two adjacent drying gaps are configured to be communicated, and the communicated position of any two adjacent drying gaps is located on the radial edge of the stirring mechanism; the drying cavity is provided with a plurality of drying areas, and any drying area is provided with a plurality of drying gaps; the number of the heating coil pipes is at least two, and the heating range of any heating coil pipe covers part of the drying gaps. The heat exchange area of the heating coil is smaller than the heat exchange area formed by steam and the drying cylinder in the prior art; the temperature in the drying cavity is higher than the temperature in the drying cylinder in the prior art, and the dryer is shorter in material drying time and higher in drying efficiency.

Description

Technical Field

[0001] This utility model relates to the field of drying devices, specifically a dryer. Background Technology

[0002] In the prior art, a patent document entitled "A Rake-Type Vacuum Dryer" with application number 202021678664.0 is provided. In the aforementioned prior art, a rake shaft is provided inside the drying cylinder, and a rake rod is provided on the rake shaft. The rake shaft drives the rake rod to rotate inside the drying cylinder, so that the rake rod can agitate the material. At the same time, by providing a gap in the drying cylinder for introducing steam, the heat of the steam is used to heat the material in the receiving cavity of the drying cylinder.

[0003] However, in the aforementioned prior art, the gap used for introducing steam occupies a relatively large area. As the steam flows along the direction of the steam inlet, the gap, and the condensate outlet, the steam temperature in the gap near the steam inlet is relatively high, while the steam temperature in the gap near the condensate outlet is relatively low. This results in uneven temperature distribution within the drying cylinder's containment chamber. The underlying reason is that during the heat exchange between the steam and the material through the drying cylinder, the steam travels a long path within the gap. This means that after flowing for a certain distance (not the entire length) within the gap, the steam undergoes a phase change, i.e., it condenses into condensate.

[0004] When the aforementioned uneven temperature occurs, it leads to uneven temperature changes in the material inside the drying drum. Some materials heat up faster than others, thus prolonging the heating time of the material by steam in the existing technology and reducing the drying efficiency.

[0005] Therefore, improving the drying efficiency of vacuum dryers has become a technical problem to be solved. Utility Model Content

[0006] To address the technical problem of how to improve the drying efficiency of vacuum dryers, this utility model provides a dryer.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] According to one aspect of the present invention, a dryer is provided, comprising a drum, a stirring mechanism, and a heating coil;

[0009] A drying chamber is formed inside the cylinder. Along the axis of the cylinder, the drying chamber is divided into multiple relatively independent drying gaps by the stirring mechanism. Any two adjacent drying gaps are configured to communicate with each other, wherein the communication position of any two adjacent drying gaps is located at the radial edge of the stirring mechanism.

[0010] The drying cavity is provided with a plurality of drying areas, and each of the drying areas is provided with a plurality of drying gaps;

[0011] The number of the heating coils is at least two, and the heating range of each of the heating coils covers a part of the drying gaps, wherein the cylinder is provided with a first port and a second port, the number of the first ports and the number of the second ports are the same as the number of the heating coils, the pipe openings at both ends of each of the heating coils are a first pipe opening and a second pipe opening, the first pipe opening is configured to communicate with only one of the first ports, and the second pipe opening is configured to communicate with only one of the second ports.

[0012] Further, along the axis of the cylinder, the drying cavity is set to N drying areas, wherein N is a natural number of 3 or 4 or 5;

[0013] The number of the heating coils is configured to be the same as the number of the drying areas;

[0014] The heating range of each of the heating coils is limited in one of the drying areas.

[0015] Further, a three-dimensional coordinate system is defined, the X-axis of the three-dimensional coordinate system is configured to be coaxial with the axis of the cylinder, the XY plane of the three-dimensional coordinate system is configured to be a horizontal plane, and the XZ plane of the three-dimensional coordinate system is configured to be a vertical plane;

[0016] The drying cavity is set to four drying areas, wherein along the XZ plane of the three-dimensional coordinate system, the drying cavity is divided into a first part and a second part, two drying areas are respectively arranged in the first part and the second part, and the heating range of each of the heating coils is limited in one of the drying areas;

[0017] Alternatively, the drying cavity is set to six drying areas, wherein along the XZ plane of the three-dimensional coordinate system, the drying cavity is divided into a first part and a second part, three drying areas are respectively arranged in the first part and the second part, and the heating range of each of the heating coils is limited in one of the drying areas;

[0018] Alternatively, the drying cavity is set to eight drying areas, wherein along the XZ plane of the three-dimensional coordinate system, the drying cavity is divided into a first part and a second part, four drying areas are respectively arranged in the first part and the second part, and the heating range of each of the heating coils is limited in one of the drying areas.

[0019] Further, the stirring mechanism comprises a stirring shaft and rake blades; the stirring shaft is internally provided with a first medium channel;

[0020] The number of the rake blades is multiple, and each of the rake blades is welded to the surface of the stirring shaft, wherein the inner part of each of the rake blades is provided with a second medium channel, and the second medium channel is communicated with the first medium channel;

[0021] The drying cavity is divided into multiple relatively independent drying gaps by the multiple rake blades.

[0022] Further, the two ends of the shaft center line of the stirring mechanism are arranged outside the barrel, and the gap between the stirring mechanism and the barrel is provided with a movable sealing component;

[0023] One end of the stirring mechanism is coaxially connected to a driving mechanism, and the other end of the stirring mechanism is provided with a third port and a fourth port, and the third port and the fourth port are respectively communicated with the first medium channel.

[0024] Further, the rake blade comprises a blade part and a paddle part;

[0025] The paddle part is arranged on the stirring shaft through the blade part, wherein the paddle part is welded to the blade part, and the blade part is welded to the stirring shaft;

[0026] The blade part is provided with the second medium channel;

[0027] The extension direction of the paddle surface of the paddle part is parallel to the shaft center line of the stirring shaft.

[0028] Further, the barrel is provided with a feeding port, a discharging port and a vacuum gauge;

[0029] The feeding port and the discharging port are respectively communicated with the drying cavity;

[0030] The lumen of the vacuum gauge is communicated with the drying cavity.

[0031] The above technical scheme has the following advantages or beneficial effects:

[0032] The dryer provided by the utility model, by dividing the drying cavity into multiple drying areas, multiple drying gaps are covered by any drying area, so that the length of any heating coil is approximately limited to the product of the length of any drying area and the circumferential length of the drying cavity, or so that the length of any heating coil is approximately limited to the product of the length of any drying area and the circumferential length of half of the drying cavity, the heat exchange area of the heating coil of the utility model is smaller than the heat exchange area formed by the steam and the drying cylinder in the prior art; the temperature in the drying cavity of the utility model is higher than the temperature in the drying cylinder in the prior art, the drying time of the dryer of the utility model for materials is shorter, and the drying efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A structure schematic diagram of the dryer provided by the utility model embodiment is shown in the figure.

[0034] Figure 2 A structure schematic diagram of the dryer provided by the utility model embodiment is shown in the figure.

[0035] Figure 3 A structure schematic diagram of the dryer provided by the utility model embodiment is shown in the figure.

[0036] Figure 4 A position diagram of the drying area provided by the utility model embodiment is shown in the figure.

[0037] Figure 5 A position diagram of the drying area provided by the utility model embodiment is shown in the figure. DETAILED DESCRIPTION

[0038] Embodiment 1:

[0039] In the embodiment, a dryer is provided to solve the technical problem of how to improve the drying efficiency of the vacuum dryer.

[0040] Specifically, referring to Figures 1 to 5 The dryer in the embodiment comprises a cylinder body 1, a stirring mechanism 2 and a heating coil 3.

[0041] The drying cavity 101 is formed in the cylinder body 1, and the drying cavity 101 is separated into multiple relatively independent drying gaps 102 along the axial line of the cylinder body 1 by the stirring mechanism 2, and any two adjacent drying gaps 102 are configured to be communicated, wherein the communicated position of any two adjacent drying gaps 102 is located at the radial edge of the stirring mechanism 2.

[0042] The drying cavity is provided with multiple drying areas, and any drying area is respectively provided with multiple drying gaps.

[0043] The number of heating coils 3 is at least two, and the heating range of any one of the heating coils 3 covers a part of the drying gap 102, wherein the drum 1 is provided with a first port 103 and a second port 104, the number of the first ports 103 and the number of the second ports 104 are respectively the same as the number of the heating coils 3, and the pipe mouth at both ends of any one of the heating coils 3 is respectively a first pipe mouth and a second pipe mouth, the first pipe mouth is configured to communicate with only one of the first ports 103, and the second pipe mouth is configured to communicate with only one of the second ports 104.

[0044] It should be understood that, referring to Figure 4 or Figure 5 , in the foregoing and the following content, the drying area is the position of a part of the drying cavity 101 designed by the staff during the actual design and manufacture of the dryer.

[0045] It should be understood that, in the foregoing and the following content, the drying gap is a part of the drying cavity, and the drying gap is formed by being limited by the stirring mechanism 2; the relationship between the drying gap and the drying area should be understood as that a plurality of drying gaps are arranged at the position (drying area) of a part of the drying cavity 101.

[0046] In this embodiment, referring to Figures 1 to 3 , the drum 1 is configured in a cylindrical shape, and the drying cavity 101 in the drum 1 is configured in a cylindrical cavity shape; the axis of the drum 1 is horizontally arranged, and the axis of the drum 1 is coaxial with the axis of the stirring mechanism 2.

[0047] Referring to Figure 2 or Figure 3 , the stirring mechanism 2 is configured to rotate in the drying cavity 101, and when the drying cavity 101 is filled with materials, the stirring mechanism 2 is used to stir the materials.

[0048] The heating coil 3 is used to inject steam, and the heating coil 3 for injecting steam becomes a heat source for heating the drying cavity 101, wherein when the drying cavity 101 is filled with materials and the heating coil 3 is injected with steam, the stirring mechanism 2 can stir the materials so that the materials form sufficient heat exchange with the heating coil 3.

[0049] Referring to Figure 1 , the first port 103 on the drum 1 is configured to inject steam into the heating coil 3, and the second port 104 on the drum 1 is configured to discharge condensed water in the heating coil 3 or a mixture of condensed water and steam.

[0050] Referring to Figure 2, the stirring mechanism 2 divides the drying cavity 101 into independent multiple drying gaps 102, and any two adjacent drying gaps 102 are communicated, which allows the material to move between any two adjacent drying gaps 102;

[0051] Referring to Figure 1 The heating range of the heating coil 3 only covers a part of the drying gaps 102, on the one hand, the length of the heating coil 3 is shortened, and on the other hand, the heat of the heating coil 3 is limited by the stirring mechanism 2, so that a large amount of heat of the heating coil 3 directly heats the drying gaps 102 covered by the heating coil 3 or the material in the drying gaps 102.

[0052] It should be understood that if the first heating coil 3 covers a part of the multiple drying gaps 102, the second heating coil 3 covers another part of the multiple drying gaps 102, and the part of the multiple drying gaps 102 and the other part of the multiple drying gaps 102 are adjacent in the axial direction of the cylinder 1, then a small amount of heat of the first heating coil 3 can flow to the multiple heating gaps covered by the second heating coil 3 by heat transfer, and vice versa, a small amount of heat of the second heating coil 3 can flow to the multiple heating gaps covered by the first heating coil 3 by heat transfer, wherein the heat transfer includes heat transfer by the flow of the material and heat radiation, so that heat transfer is formed between the part of the multiple drying gaps 102 and the other part of the multiple drying gaps 102.

[0053] In order to facilitate those skilled in the art to understand that the heating range of any heating coil 3 covers a part of the drying gaps 102, in the embodiment, the following preferred technical solutions are provided:

[0054] Preferred technical solution one:

[0055] Referring to Figure 1 Or Figure 4 Along the axial direction of the cylinder 1, the drying cavity 101 is divided into N drying areas, wherein N is a natural number of 3 or 4 or 5;

[0056] The number of heating coils 3 is configured to be the same as the number of drying areas;

[0057] The heating range of any heating coil 3 is limited in one of the drying areas.

[0058] It should be understood that in the foregoing and the following, without special explanation, when the drying cavity 101 in the same cylinder 1 is provided with multiple drying areas, it should be understood that the drying cavity 101 is evenly divided into multiple drying areas with equal axial length.

[0059] In the preferred technical solution one mentioned above, if the drying cavity 101 is provided with three drying areas along the axial direction of the cylinder body 1 (see Figure 4 , S1 is the first drying area, S2 is the second drying area, and S3 is the third drying area), then in any one of the drying areas, only one heating coil 3 is provided; in other words, any one heating coil 3 only covers one of the drying areas; from the overall perspective of the drying cavity 101, after the three drying areas are covered by one heating coil 3 respectively, the drying cavity 101 is covered by the three heating coils 3 as a whole;

[0060] In the preferred technical solution one mentioned above, in any one of the drying areas, the length of any one heating coil 3 is related to the axial length of the drying area, specifically, referring to Figure 1 , the two ends of the axial line of the drying area are the head end and the tail end respectively, any one heating coil 3 extends from the head end to the tail end of the drying area it covers, then the heating coil 3 forms a bending part at the tail end, then the heating coil 3 extends from the tail end to the head end of the drying area along the direction, and the heating coil 3 forms a bending part at the head end; in this way, until the heating coil 3 is evenly arranged along the circumferential direction of the cylinder body 1.

[0061] In the preferred technical solution one mentioned above, if the drying cavity 101 is provided with four drying areas or five drying areas along the axial direction of the cylinder body 1, then the technical solution of arranging the aforementioned three heating coils 3 in the three drying areas is defined as solution A, the technical solution of arranging four heating coils 3 in the four drying areas is defined as solution B, and the technical solution of arranging five heating coils 3 in the five drying areas is defined as solution C;

[0062] Comparing the solutions A, B and C with each other, under the condition that the length of the drying cavity 101 is the same, the only difference is that the length of the drying area in solution A is greater than that in solution B, and the length of the drying area in solution B is greater than that in solution C; correspondingly, the length of the heating coil 3 in solution A is greater than that in solution B, and the length of the heating coil 3 in solution B is greater than that in solution C.

[0063] In practical application, from the perspective of the temperature of the first port and the temperature of the second port of each heating coil 3, the first port is communicated with the first port portion 103 on the cylinder body 1, and the first port portion 103 is used for injecting steam; the second port is communicated with the second port portion 104 on the cylinder body 1, and the second port portion 104 is used for discharging condensed water or a mixture of condensed water and steam; the temperature of the first port in scheme A, the temperature of the first port in scheme B, and the temperature of the first port in scheme C are the same respectively; however, since the length of the heating coil 3 in scheme A is greater than the length of the heating coil 3 in scheme B, the heat exchange area of the heating coil 3 in scheme A is greater than the heat exchange area of the heating coil 3 in scheme B, so that the temperature of the second port in scheme A is less than the temperature of the second port in scheme B; by analogy, since the length of the heating coil 3 in scheme B is greater than the length of the heating coil 3 in scheme C, the heat exchange area of the heating coil 3 in scheme B is greater than the heat exchange area of the heating coil 3 in scheme C, so that the temperature of the second port in scheme B is less than the temperature of the second port in scheme C.

[0064] From the above all contents of the preferred technical scheme one, it can be known that in the drying cavity 101 of the cylinder body 1, the shorter the length of the heating coil 3 is, the higher the temperature of the second port of the heating coil 3 is; in other words, the higher the temperature of the second port of the heating coil 3 is, the relatively higher the temperature in the heating range where the heating coil 3 is located is; on the contrary, the lower the temperature of the second port of the heating coil 3 is, the relatively lower the temperature in the heating range where the heating coil 3 is located is; the person skilled in the art can select to set the drying cavity 101 in the cylinder body 1 to be three or four or five drying areas according to the actual process requirements (drying time and drying cycle), and correspondingly, the heating coil 3 with a length matching the number of drying cavities 101 can be set.

[0065] Preferred technical scheme two:

[0066] Referring to Figure 5 , a three-dimensional coordinate system is defined, the X-axis of the three-dimensional coordinate system is configured to be coaxial with the axis of the cylinder body 1, the XY plane of the three-dimensional coordinate system is configured to be a horizontal plane, and the XZ plane of the three-dimensional coordinate system is configured to be a vertical plane;

[0067] The drying cavity 101 is set to four drying areas, wherein along the XZ plane of the three-dimensional coordinate system, the drying cavity 101 is divided into a first part A1 and a second part A2, and two drying areas are respectively arranged in the first part A1 and the second part A2, and the heating area of any one heating coil 3 is limited in one of the drying areas;

[0068] Alternatively, the drying chamber 101 is set with 6 drying zones. Along the XZ plane of the three-dimensional coordinate system, the drying chamber 101 is divided into a first part A1 and a second part A2. In the first part A1 and the second part A2, three drying zones are respectively set. The heating zone of any heating coil 3 is restricted to one of the drying zones.

[0069] Alternatively, the drying chamber 101 may be configured with 8 drying zones. Along the XZ plane of the three-dimensional coordinate system, the drying chamber 101 may be divided into a first part A1 and a second part A2. In the first part A1 and the second part A2, four drying zones may be provided respectively, and the heating zone of any heating coil 3 may be restricted to one of the drying zones.

[0070] In the above-mentioned preferred technical solution 2, the technical solution of setting the drying chamber 101 to 4 drying zones is defined as the first technical solution, the technical solution of setting the drying chamber 101 to 6 drying zones is defined as the second technical solution, and the technical solution of setting the drying chamber 101 to 8 drying zones is defined as the third technical solution.

[0071] In the first technical solution, see Figure 1 or Figure 5 Using the XZ plane of the three-dimensional coordinate system as the interface, two of the four drying areas (S01 and S02 are the drying areas of the first part A1) are located in the first part A1, and the other two (S03 and S04 are the drying areas of the second part A2) are located in the second part A2. In the first part A1, the two drying areas are arranged side by side and in sequence along the axis of the cylinder 1. Similarly, in the second part A2, the two drying areas are arranged side by side and in sequence along the axis of the cylinder 1.

[0072] From the perspective of the cylinder 1, the two drying areas located in the first part A1 are actually half of the entire drying chamber 101, and the two drying areas located in the second part A2 are actually the other half of the entire drying chamber 101. Only one heating coil 3 is provided in each drying area. In the two drying areas of the first part A1, the two heating coils 3 cover half of the circumference of the entire drying chamber 101, and in the two drying areas of the second part A2, the two heating coils 3 cover the other half of the circumference of the entire drying chamber 101. From the perspective of the drying chamber 101 as a whole, after each of the four drying areas is covered by a heating coil 3, the entire drying chamber 101 is covered by four heating coils 3.

[0073] In the first scheme, the length of each heating coil 3 is related to the axial length of the drying area, and the length of each heating coil 3 is related to the circumferential length of the drying area. Specifically, the two ends of the axial center line of the drying area are the first end and the last end, respectively. Each heating coil 3 extends from the first end to the last end of the drying area it covers, and then forms a bending part at the last end. Then, the heating coil 3 extends from the last end to the first end of the drying area along the circumferential direction of the drum 1, and forms a bending part at the first end. In this way, the heating coil 3 is evenly arranged along the half circumferential direction of the drum 1.

[0074] In the second scheme, the XZ plane of the three-dimensional coordinate system is used as a dividing surface, and three of the six drying areas are located in the first part A1, and the remaining three are located in the second part A2. In the first part A1, the three drying areas are arranged in parallel and in sequence along the axial center line of the drum 1. Similarly, in the second part A2, the three drying areas are arranged in parallel and in sequence along the axial center line of the drum 1.

[0075] In the third scheme, the XZ plane of the three-dimensional coordinate system is used as a dividing surface, and four of the eight drying areas are located in the first part A1, and the remaining four are located in the second part A2. In the first part A1, the four drying areas are arranged in parallel and in sequence along the axial center line of the drum 1. Similarly, in the second part A2, the four drying areas are arranged in parallel and in sequence along the axial center line of the drum 1.

[0076] Comparing the first scheme, the second scheme and the third scheme, under the condition that the length of the drying cavity 101 is the same, the difference is only that the length of the drying area in the first scheme is greater than that in the second scheme, and the length of the drying area in the second scheme is greater than that in the third scheme. Correspondingly, the length of the heating coil 3 in the first scheme is greater than that in the second scheme, and the length of the heating coil 3 in the second scheme is greater than that in the third scheme.

[0077] In practical application, from the perspective of the temperature of the first pipe opening and the second pipe opening of each heating coil 3, the first pipe opening communicates with the first opening part 103 on the cylinder body 1, and the first opening part 103 is used for injecting steam; the second pipe opening communicates with the second opening part 104 on the cylinder body 1, and the second opening part 104 is used for discharging condensed water or a mixture of condensed water and steam; the temperature of the first pipe opening in the first technical solution, the temperature of the first pipe opening in the second technical solution, and the temperature of the first pipe opening in the third technical solution are the same respectively; however, since the length of the heating coil 3 in the first technical solution is greater than the length of the heating coil 3 in the second technical solution, the heat exchange area of the heating coil 3 in the first technical solution is greater than the heat exchange area of the heating coil 3 in the second technical solution, so that the temperature of the second pipe opening in the first technical solution is less than the temperature of the second pipe opening in the second technical solution; by analogy, since the length of the heating coil 3 in the second technical solution is greater than the length of the heating coil 3 in the third technical solution, the heat exchange area of the heating coil 3 in the second technical solution is greater than the heat exchange area of the heating coil 3 in the third technical solution, so that the temperature of the second pipe opening in the second technical solution is less than the temperature of the second pipe opening in the third technical solution.

[0078] From the above all contents of the preferred technical solution two, it can be known that, in the drying cavity 101 of the cylinder body 1, the shorter the length of the heating coil 3, the higher the temperature of the second pipe opening of the heating coil 3; in other words, the higher the temperature of the second pipe opening of the heating coil 3, the relatively higher the temperature in the heating range where the heating coil 3 is located; on the contrary, the lower the temperature of the second pipe opening of the heating coil 3, the relatively lower the temperature in the heating range where the heating coil 3 is located; the person skilled in the art can select to set the drying cavity 101 in the cylinder body 1 to be four or six or eight drying areas according to the actual process requirements (drying time and drying cycle), and correspondingly, the heating coil 3 with a length matching the number of drying cavities 101 can be set.

[0079] By comparing the foregoing preferred technical solution one and the preferred technical solution two, the person skilled in the art can find that the length of the heating coil 3 in the preferred technical solution two is less than the length of the heating coil 3 in the preferred technical solution one, because in the preferred technical solution two, each heating coil 3 is arranged along half the circumferential length of the cylinder body 1, while in the preferred technical solution one, each heating coil 3 is arranged along the circumferential length of the cylinder body 1; in this case, the temperature of the second pipe opening in the preferred technical solution two is higher than the temperature of the second pipe opening in the preferred technical solution one, and in other words, the temperature in the drying cavity 101 in the preferred technical solution two is higher than the temperature in the drying cavity 101 in the preferred technical solution one, which is obvious.

[0080] It should be understood that, in addition to the aforementioned preferred technical solution one and preferred technical solution two, the dryer of the present embodiment can also be provided with two drying areas in the drying cavity 101 of the drum 1, that is, each drying area is provided with only one heating coil 3; specifically, the X axis of the three-dimensional coordinate system is coaxial with the axis line of the drum 1, the drying cavity 101 can be divided into a first drying area and a second drying area by the XZ plane of the three-dimensional coordinate system, the drying cavity 101 can be divided into a first drying area and a second drying area by the YZ plane of the three-dimensional coordinate system, and the drying cavity 101 can also be divided into a first drying area and a second drying area by the YZ plane of the three-dimensional coordinate system.

[0081] It should be understood that the aforementioned preferred technical solution one and preferred technical solution two can also be mixed to form other technical solutions; specifically, the X axis of the three-dimensional coordinate system is coaxial with the axis line of the drum 1, the drying cavity 101 is first divided into at least two sections by at least one reference surface parallel to the YZ plane, the drying area and the heating coil 3 are arranged in at least one section according to the aforementioned preferred technical solution one, and the drying area and the heating coil 3 are arranged in at least another section according to the aforementioned preferred technical solution two.

[0082] In the prior art (a rake type vacuum dryer, application number 202021678664.0), a gap for injecting steam is arranged in the drying cylinder, so that the length of the steam flow path is limited to the product of the axial length and the circumferential length of the gap, resulting in an excessively large heat exchange area formed by the steam and the drying cylinder; during the process of injecting steam into the gap and discharging the steam from the gap to the outside of the gap, the excessively large heat exchange area formed by the steam and the drying cylinder results in a relatively low discharge temperature of the discharge port for discharging condensed water or a mixture of condensed water and steam, or in other words, the temperature in the drying cylinder is relatively low.

[0083] In the embodiment, the drying cavity 101 is divided into multiple drying areas, the drying cavity 101 is divided into multiple drying gaps 102 by the stirring mechanism 2, any drying area covers multiple drying gaps 102, any heating coil 3 is limited in one of the drying areas, so that the length of any heating coil 3 is approximately limited to the product of the length of any drying area and the circumferential length of the drying cavity 101, or the length of any heating coil 3 is approximately limited to the product of the length of any drying area and the circumferential length of half of the drying cavity 101, so that the heat exchange area of the heating coil 3 in the embodiment is smaller than the heat exchange area formed by the steam and the drying cylinder in the prior art; during the process that any heating coil 3 is injected with steam and the steam flows through the heating coil 3 and is discharged out of the heating coil 3, due to the relatively small heat exchange area of the heating coil 3, the discharge temperature of the second port 104 for discharging the condensed water or the mixture of the condensed water and the steam is relatively high, in other words, the temperature in the drying cavity 101 of the embodiment is higher than the temperature in the drying cylinder of the prior art, so that the drying time of the drying machine of the embodiment for the material is shorter and the drying efficiency is higher.

[0084] Further, referring to Figure 2 Or Figure 3 , the drying machine of the embodiment, the stirring mechanism 2 includes a stirring shaft 201 and a rake blade 202; the stirring shaft 201 is provided with a first medium passage;

[0085] The number of the rake blade 202 is multiple, and any rake blade 202 is respectively welded to the surface of the stirring shaft 201, wherein the inner part of any rake blade 202 is respectively provided with a second medium passage, and the second medium passage is communicated with the first medium passage;

[0086] The drying cavity 101 is divided into multiple relatively independent drying gaps 102 by the multiple rake blades 202.

[0087] Among them, the inner cavity of the rake blade 202 is the second medium passage, and the second medium passage is used for flowing steam; after the rake blade 202 is welded with the stirring shaft 201, the second medium passage is communicated with the first medium passage in the stirring shaft 201, so that the steam flows into the second medium passage through the first medium passage, and then flows into the first medium passage from the second medium passage;

[0088] The second medium passage can be configured in multiple structures, for example, the second medium passage can be configured as an independent chamber, for example, the second medium passage can be configured as a tubular passage, and for example, the second medium passage can be configured as a spiral passage.

[0089] The first function of the rake blade 202 is to stir the material injected into the barrel 1, and the second function of the rake blade 202 is to heat the material in the drying gap 102 more quickly after being injected with steam, and to make the heating of the material more uniform.

[0090] The maximum diameter of the stirring mechanism 2 is smaller than the maximum diameter of the drying cavity 101, and the heating coil 3 is arranged between the stirring mechanism 2 and the inner wall of the barrel 1; in other words, the rake blade 202 is limited between the stirring shaft 201 and the heating coil 3, so as to avoid the negative effect of interference between the rake blade 202 and the heating coil 3 during the rotation of the stirring mechanism 2.

[0091] The specific structure of the stirring shaft 201 can adopt the structure of the stirring shaft 201 in the prior art, for example, the prior art with the application number 202321298903.3 and the name of a new rake type vacuum dryer, the structure of the transmission shaft of which can be used as the stirring shaft 201 in the embodiment.

[0092] Further, referring to Figure 1 , the drying device of the embodiment, the two ends of the axis of the stirring mechanism 2 are arranged outside the barrel 1, and the gap between the stirring mechanism 2 and the barrel 1 is provided with a movable sealing component;

[0093] One end of the stirring mechanism 2 is coaxially connected to the driving mechanism 6, and the other end of the stirring mechanism 2 is provided with a third port 203 and a fourth port 204, which are respectively communicated with the first medium passage.

[0094] The driving mechanism 6 is arranged outside the barrel 1, and the driving mechanism 6 can adopt the motor and speed reducer in the prior art; the power output end of the driving mechanism 6 and the stirring mechanism 2 can be connected through a shaft coupling, which is a common knowledge for those skilled in the art, and will not be described here.

[0095] The two ends of the axis of the stirring mechanism 2 are arranged outside the barrel 1, and from the perspective of the barrel 1, the two ends along the axis of the barrel 1 need to be provided with a first mounting port and a second mounting port for the two ends of the stirring mechanism 2 to penetrate; since the stirring mechanism 2 rotates under the driving of the driving mechanism 6, and the barrel 1 remains stationary as a whole, a movable sealing component is arranged at the positions of the first mounting port and the second mounting port;

[0096] The movable sealing component (not shown in the figure) can adopt the movable sealing component in the prior art, for example, a contact type dynamic sealing in which the moving part directly contacts the stationary part, or a non-contact type dynamic sealing in which the moving part does not directly contact the stationary part.

[0097] The third port 203 is used for injecting steam into the first medium channel in the stirring shaft, and the fourth port 204 is used for discharging condensed water or a mixture of condensed water and steam in the first medium channel.

[0098] Further, referring to Figure 2 The rake blade 202 of the drying machine comprises a blade part 01 and a paddle part 02.

[0099] The paddle part 02 is arranged on the stirring shaft 201 through the blade part 01, wherein the paddle part 02 is welded with the blade part 01, and the blade part 01 is welded with the stirring shaft 201.

[0100] The blade part 01 is provided with a second medium channel.

[0101] The extending direction of the paddle surface of the paddle part 02 is parallel to the axis of the stirring shaft 201.

[0102] The second medium channel is limited in the contour of the blade part 01, and the paddle part 02 is located on the contour of the blade part 01 and welded with the blade part 01.

[0103] The paddle part 02 is specifically welded by multiple blades; for example, four fan-shaped blades are used, each of which is semicircular when viewed along the axial direction of the fan-shaped blade, and a spacing is formed between the circular part and the circumferential part of each fan-shaped blade when viewed along the radial direction of the fan-shaped blade. The arc edges of any two fan-shaped blades are welded together to obtain two intermediate products, and a hollow structure is naturally formed between any two intermediate products. The circular parts of the two intermediate products are welded to the stirring shaft 201 respectively to obtain the welded paddle part 02.

[0104] From the overall perspective of the drying machine, the paddle part 02 is located between the cylinder 1 and the blade part 01, and the blade part 01 is located between the paddle part 02 and the stirring shaft 201. When the stirring mechanism 2 rotates, the second medium channel in the blade part 01 is injected with steam, thereby heating the material in the drying gap 102. In addition, the blade part 01 does a small amount of work on the material during rotation, so that the blade part 01 forms a motion relative to the material located in the drying gap 102. The paddle part 02 is mainly used to stir the material in the circumferential direction. After being stirred by the paddle part 02, the material can be heated more uniformly, and the evaporation of water contained in the material into water vapor is facilitated.

[0105] Further, referring to Figure 1 The drying machine of the embodiment is provided with a feeding port 4, a discharging port 5 and a vacuum gauge on the cylinder 1.

[0106] The feeding port 4 and the discharging port 5 are respectively communicated with the drying cavity 101.

[0107] The lumen of the vacuum gauge is communicated with the drying cavity 101.

[0108] In actual use, the material is injected into the drying cavity 101 of the barrel 1 through the feeding port 4; the drying cavity 101 is vacuumized during the process that the material in the drying cavity 101 is heated by the heating coil 3, and the air pressure in the drying cavity 101 is recorded by a vacuum gauge (not shown in the figure); after the material is dried, the material in the drying cavity 101 is discharged to the outside of the barrel 1 through the discharging port 5.

[0109] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation, direct or indirect application in other related technical fields by using the content of the present application specification and drawings are also included in the patent protection range of the present application.

Claims

1. A dryer characterized by, The dryer comprises a barrel, a stirring mechanism and a heating coil; The barrel is provided with a drying cavity, which is divided into a plurality of drying gaps by the stirring mechanism along the axial line of the barrel, and any two adjacent drying gaps are configured to be communicated, wherein the communication position of any two adjacent drying gaps is located at the radial edge of the stirring mechanism; The drying cavity is provided with a plurality of drying areas, and each drying area is provided with a plurality of drying gaps; The number of the heating coil is at least two, and the heating range of each heating coil covers part of the drying gaps, wherein the barrel is provided with a first port and a second port, the number of the first port and the number of the second port are the same as the number of the heating coil, the two ends of each heating coil are respectively provided with a first port and a second port, the first port is configured to communicate with only one of the first ports, and the second port is configured to communicate with only one of the second ports.

2. The dryer according to claim 1, characterized in that, Along the axial line of the barrel, the drying cavity is divided into N drying areas, wherein N is a natural number of 3, 4 or 5; The number of the heating coil is configured to be the same as the number of the drying areas; The heating area of each heating coil is limited in one of the drying areas.

3. The dryer according to claim 1, characterized in that, A three-dimensional coordinate system is defined, the X-axis of the three-dimensional coordinate system is coaxial with the axial line of the barrel, the XY plane of the three-dimensional coordinate system is a horizontal plane, and the XZ plane of the three-dimensional coordinate system is a vertical plane; The drying cavity is divided into four drying areas, wherein along the XZ plane of the three-dimensional coordinate system, the drying cavity is divided into a first part and a second part, and two drying areas are arranged in each part, and the heating area of each heating coil is limited in one of the drying areas; Alternatively, the drying cavity is divided into six drying areas, wherein along the XZ plane of the three-dimensional coordinate system, the drying cavity is divided into a first part and a second part, and three drying areas are arranged in each part, and the heating area of each heating coil is limited in one of the drying areas; Alternatively, the drying cavity is divided into eight drying areas, wherein along the XZ plane of the three-dimensional coordinate system, the drying cavity is divided into a first part and a second part, and four drying areas are arranged in each part, and the heating area of each heating coil is limited in one of the drying areas.

4. The dryer according to any one of claims 1 to 3, characterized in that, The stirring mechanism comprises a stirring shaft and a rake blade; the stirring shaft is provided with a first medium channel; The number of the rake blades is multiple, and each rake blade is welded to the surface of the stirring shaft, wherein each rake blade is provided with a second medium channel, and the second medium channel communicates with the first medium channel; The drying cavity is divided into a plurality of drying gaps by the plurality of rake blades.

5. The dryer according to claim 4, characterized in that, Two ends of the shaft center line of the stirring mechanism are arranged outside the barrel, and a movable sealing part is arranged between the stirring mechanism and the barrel; One end of the stirring mechanism is coaxially connected to a driving mechanism, and the other end of the stirring mechanism is provided with a third port and a fourth port, and the third port and the fourth port are respectively communicated with the first medium channel.

6. The dryer according to claim 4, characterized in that, The rake blade comprises a blade part and a paddle part; The paddle part is arranged on the stirring shaft through the blade part, wherein the paddle part is welded with the blade part, and the blade part is welded with the stirring shaft; The blade part is provided with the second medium channel; The extending direction of the paddle surface of the paddle part is parallel to the shaft center line of the stirring shaft.

7. The dryer according to claim 1, characterized in that, The barrel is provided with a feeding port, a discharging port and a vacuum gauge; The feeding port and the discharging port are respectively communicated with the drying cavity; The lumen of the vacuum gauge is communicated with the drying cavity.

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