Drying kettle

Abstract

The drying kettle comprises a kettle body and a stirring paddle arranged in the kettle body, the stirring paddle comprises a main shaft, an inner helical ribbon and an outer helical ribbon, and the inner helical ribbon and the outer helical ribbon are both fixed to the main shaft to form an inner-outer double-helical-ribbon structure; the spindle is of a hollow structure, a partition plate is arranged in the spindle, and the interior of the spindle is divided into an upper space and a lower space through the partition plate. An oil inlet pipe is arranged in the upper space, the lower end of the oil inlet pipe is fixed to the partition plate, and the oil inlet pipe is communicated with the lower space to form an oil inlet channel. An oil outlet channel is formed between the outer surface of the oil inlet pipe and the inner wall of the spindle; the outer surface of the inner helical ribbon and the outer surface of the outer helical ribbon are both provided with heat conduction oil transfer structures, heat conduction oil flow channels are formed in the heat conduction oil transfer structures, inlets of the heat conduction oil flow channels are communicated with the lower space, and outlets of the heat conduction oil flow channels are communicated with the oil outlet channel. According to the powder drying device, powder can be heated more uniformly, meanwhile, the drying efficiency is greatly improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of powder drying equipment, and in particular to a drying kettle. BACKGROUND

[0002] In today's many industrial production fields, especially in the process involving powder material drying treatment, the drying kettle plays a crucial role. With the continuous rise of product quality requirements in various industries and the urgent need to improve production efficiency, the optimization of drying process and equipment becomes a key breakthrough point.

[0003] In the traditional drying kettle, the powder is generally introduced into the kettle by being sucked into the kettle through a vacuum. In the heating link, the disc pipe tightly wrapped outside the kettle is mainly relied on to supply heat by passing high-temperature heat-conducting oil into the disc pipe. At the same time, the paddle assembled in the kettle plays a stirring role, constantly turning the powder upward to make the powder contact the inner wall of the kettle, so that the heat conducted to the kettle by the heat-conducting oil promotes the evaporation of water molecules in the powder, and finally the water vapor is removed by the vacuum system to achieve the purpose of drying.

[0004] However, the structure and operation mode of this traditional drying kettle have exposed many drawbacks in practical application. The most prominent one is the uneven heating problem in the drying process. Since the heat is mainly transferred from the disc pipe outside the kettle, only the part of the powder close to the edge of the kettle can receive sufficient heat in the stirring process, while the powder near the center of the kettle is far away from the heat source and is difficult to ensure that it can continuously and uniformly contact enough heat in the paddle stirring process, resulting in a serious lack of heat for this part of the powder. This uneven heating directly leads to low drying efficiency, not only prolonging the overall drying time and increasing energy consumption, but also affecting the quality stability of the powder due to local over-drying or under-drying, such as causing powder particle agglomeration, inconsistent product moisture content, etc., which is difficult to meet the stringent requirements of modern industrial fine and efficient production.

[0005] In addition, with the increasingly fierce market competition, enterprises are pursuing high-quality products while being increasingly strict in controlling production costs. The low-efficiency operation of the traditional drying kettle makes the energy consumption cost per unit product high, and the rising rate of defective products caused by unstable drying effect further increases the operating burden of enterprises. In the context of gradually improving environmental protection requirements, high-energy consumption and low-efficiency drying methods are also contrary to the concept of sustainable development, and a new drying kettle design scheme that can effectively solve the problem of uneven heating and greatly improve the drying efficiency is urgently needed to promote the stable development of related industries. Therefore, the present application provides a drying kettle. CONTENT OF THE PRESENT INVENTION

[0006] The application provides a drying furnace, which can make the powder heated more uniformly, greatly improve the drying efficiency and reduce the production cost.

[0007] Therefore, the application provides a drying furnace, which comprises a furnace body and a stirring paddle arranged in the furnace body.

[0008] The stirring paddle comprises a main shaft, an inner screw belt and an outer screw belt.

[0009] The inner screw belt and the outer screw belt are fixed on the main shaft and form an inner-outer double screw belt structure.

[0010] The main shaft is a hollow structure, and a partition plate is arranged in the main shaft, and the main shaft is divided into an upper space and a lower space by the partition plate.

[0011] An oil inlet pipe is arranged in the upper space.

[0012] The lower end of the oil inlet pipe is fixed on the partition plate, and the oil inlet pipe is communicated with the lower space to form an oil inlet channel.

[0013] An oil outlet channel is formed between the outer surface of the oil inlet pipe and the inner wall of the main shaft.

[0014] The outer surface of the inner screw belt and the outer surface of the outer screw belt are provided with a heat-conducting oil transmission structure.

[0015] The heat-conducting oil transmission structure forms a heat-conducting oil flow channel inside.

[0016] The inlet of the heat-conducting oil flow channel is communicated with the lower space.

[0017] The outlet of the heat-conducting oil flow channel is communicated with the oil outlet channel.

[0018] Optionally, a hot oil type rotary joint is connected to the upper end of the main shaft.

[0019] The oil inlet of the hot oil type rotary joint is communicated with the upper end of the oil inlet pipe.

[0020] The oil outlet of the hot oil type rotary joint is communicated with the oil outlet channel.

[0021] Optionally, the lower end of the oil inlet pipe is threadedly connected to the partition plate, and the lower space is communicated with the lower space through a communication hole formed in the partition plate.

[0022] Optionally, the lower space is connected with the inlet of the heat-conducting oil flow channel through a connecting pipe.

[0023] Optionally, the heat-conducting oil transmission structure is a coil pipe, a jacket or a plate structure welded on the outer surface of the inner screw belt or the outer screw belt.

[0024] Optionally, the kettle body bottom is provided with an annular nitrogen filling port.

[0025] Optionally, the kettle body top is provided with a bearing;

[0026] The main shaft is installed in the bearing.

[0027] Optionally, further comprising: a motor;

[0028] The motor is drivingly connected to the main shaft through a transmission assembly for driving the main shaft to rotate.

[0029] Optionally, the transmission assembly is a chain transmission assembly, a gear transmission assembly or a belt transmission assembly.

[0030] Optionally, the outer screw belt is arranged outside the inner screw belt, and the outer screw belt is concentrically arranged with the inner screw belt.

[0031] From the above technical solutions, the embodiments of the present application have the following advantages: the present drying kettle is fixed on the main shaft through the inner screw belt and the outer screw belt to form an inner-outer double screw belt structure, which can turn the powder from different levels and angles during stirring. The inner screw belt is mainly responsible for stirring the powder close to the central area, and the outer screw belt is responsible for the powder close to the kettle body wall. The two cooperate with each other to ensure that the powder at different positions in the kettle body can be fully stirred, further promoting the uniformity of the powder heating and improving the drying quality. At the same time, the main shaft is provided with a hollow structure, and the main shaft is divided into an upper space and a lower space by a partition plate. An oil inlet pipe is arranged in the upper space, the lower end of the oil inlet pipe is fixed on the partition plate, the oil inlet pipe is in communication with the lower space to form an oil inlet channel, and an oil outlet channel is formed between the outer surface of the oil inlet pipe and the inner wall of the main shaft. The outer surfaces of the inner screw belt and the outer screw belt are provided with heat conducting oil transmission structures, the heat conducting oil transmission structures form heat conducting oil flow channels inside, the inlets of the heat conducting oil flow channels are in communication with the lower space, and the outlets of the heat conducting oil flow channels are in communication with the oil outlet channel. The stirring paddle can be heated by heat conducting oil, the powder is heated and dried when the stirring paddle stirs and turns the powder, the heating area contacted by the powder is increased, and the drying efficiency is greatly improved, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 FIG. 1 is a structural schematic diagram of a drying kettle in an embodiment of the present application;

[0033] Figure 2 FIG. 4 is a structural schematic diagram of a stirring paddle in an embodiment of the present application;

[0034] Figure 3 FIG. 5 is a partial enlarged view of the stirring paddle in an embodiment of the present application;

[0035] Figure 4 It is a partial enlarged view of the upper part of the drying kettle in the embodiment of the application;

[0036] Figure 5 It is a first structure schematic view of the heat conducting oil transmission structure in the embodiment of the application;

[0037] Figure 6 It is a second structure schematic view of the heat conducting oil transmission structure in the embodiment of the application;

[0038] Figure 7 It is a third structure schematic view of the heat conducting oil transmission structure in the embodiment of the application;

[0039] Figure 8 It is a fourth structure schematic view of the heat conducting oil transmission structure in the embodiment of the application.

[0040] In the drawings, the reference signs are as follows:

[0041] 1-kettle body, 2-main shaft, 3-inner screw belt, 4-outer screw belt, 5-motor, 6-bearing, 7-separation plate, 8-heat oil type rotary joint, 9-connection pipe, 10-ring nitrogen filling port, 11-transmission assembly, 12-oil inlet, 13-oil outlet, 14-oil inlet pipe, 15-oil outlet channel, 16-heat conducting oil transmission structure. DETAILED DESCRIPTION

[0042] In order to enable personnel in the technical field to better understand the application scheme, the technical scheme in the embodiment of the application will be described clearly and completely in combination with the drawings in the embodiment of the application. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0043] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0044] Unless specifically stated and defined otherwise, the terms "mounting", "connected", "connecting" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0045] The present application provides an embodiment of a drying kettle, please refer to Figure 1 、 Figure 2 and Figures 5 to 8 .

[0046] The drying kettle in the embodiment comprises a kettle body 1 and a stirring paddle arranged in the kettle body 1, the stirring paddle comprises a main shaft 2, an inner screw belt 3 and an outer screw belt 4, the inner screw belt 3 and the outer screw belt 4 are fixed on the main shaft 2, and constitute an inner and outer double screw belt structure; the main shaft 2 is a hollow structure, a partition plate 7 is arranged in the main shaft 2, and the main shaft 2 is divided into an upper space and a lower space by the partition plate 7; an oil inlet pipe 14 is arranged in the upper space, the lower end of the oil inlet pipe 14 is fixed on the partition plate 7, the oil inlet pipe 14 is communicated with the lower space, and an oil inlet channel is formed; an oil outlet channel 15 is formed between the outer surface of the oil inlet pipe 14 and the inner wall of the main shaft 2; the outer surface of the inner screw belt 3 and the outer surface of the outer screw belt 4 are both provided with a heat conducting oil transmission structure 16, the heat conducting oil transmission structure 16 forms a heat conducting oil flow channel inside, the inlet of the heat conducting oil flow channel is communicated with the lower space, and the outlet of the heat conducting oil flow channel is communicated with the oil outlet channel 15.

[0047] It should be noted that: the drying kettle is fixed on the main shaft 2 through the inner screw belt 3 and the outer screw belt 4 to form an inner and outer double screw belt structure, which can turn the powder from different levels and angles during stirring. The inner screw belt 3 is mainly responsible for stirring the powder near the center area, and the outer screw belt 4 is for the powder near the wall of the kettle body 1. The two cooperate with each other to ensure that the powder at different positions in the kettle body 1 can be fully stirred, further improving the uniformity of the powder heating and improving the drying quality. At the same time, the main shaft 2 is provided as a hollow structure, and a partition plate 7 is arranged in the main shaft 2, and the main shaft 2 is divided into an upper space and a lower space by the partition plate 7; an oil inlet pipe 14 is arranged in the upper space, the lower end of the oil inlet pipe 14 is fixed on the partition plate 7, and the oil inlet pipe 14 is communicated with the lower space to form an oil inlet channel; an oil outlet channel 15 is formed between the outer surface of the oil inlet pipe 14 and the inner wall of the main shaft 2; the outer surfaces of the inner screw belt 3 and the outer screw belt 4 are provided with heat conducting oil transmission structures 16, the heat conducting oil transmission structures 16 form heat conducting oil flow channels inside, the entrances of the heat conducting oil flow channels are communicated with the lower space, and the outlets of the heat conducting oil flow channels are communicated with the oil outlet channel 15, so that the stirring paddle can be heated by the heat conducting oil, the powder is heated and dried when the stirring paddle stirs and turns the powder, the heating area contacted by the powder is increased, and the drying efficiency is greatly improved, and the production cost is reduced.

[0048] The above is an embodiment one of the drying kettle provided by the embodiment of the present application, and the following is an embodiment two of the drying kettle provided by the embodiment of the present application, please refer to Figures 1 to 8 .

[0049] The drying kettle in the embodiment includes: a kettle body 1 and a stirring paddle arranged in the kettle body 1, the stirring paddle includes a main shaft 2, an inner screw belt 3 and an outer screw belt 4, the inner screw belt 3 and the outer screw belt 4 are fixed on the main shaft 2 to form an inner and outer double screw belt structure; the main shaft 2 is a hollow structure, and a partition plate 7 is arranged in the main shaft 2, and the main shaft 2 is divided into an upper space and a lower space by the partition plate 7; an oil inlet pipe 14 is arranged in the upper space, the lower end of the oil inlet pipe 14 is fixed on the partition plate 7, and the oil inlet pipe 14 is communicated with the lower space to form an oil inlet channel; an oil outlet channel 15 is formed between the outer surface of the oil inlet pipe 14 and the inner wall of the main shaft 2; the outer surfaces of the inner screw belt 3 and the outer screw belt 4 are provided with heat conducting oil transmission structures 16, the heat conducting oil transmission structures 16 form heat conducting oil flow channels inside, the entrances of the heat conducting oil flow channels are communicated with the lower space, and the outlets of the heat conducting oil flow channels are communicated with the oil outlet channel 15.

[0050] It can be understood that, in use, the heat conducting oil enters the lower space from the oil inlet pipe 14, then flows into the heat conducting oil transmission structures 16 inside the inner screw belt 3 and the outer screw belt 4, heats the screw belt blades through the heat conducting oil flow channels formed inside the heat conducting oil transmission structures 16, and finally flows out through the oil outlet channel 15, forming a circulating oil path, so as to heat and dry the powder on the surface of the stirring paddle.

[0051] Specifically, the upper end of the main shaft 2 is connected with a hot oil type rotary joint 8, the oil inlet 12 of the hot oil type rotary joint 8 is connected with the upper end of the oil inlet pipe 14, and the oil outlet 13 of the hot oil type rotary joint 8 is connected with the oil outlet channel 15. When the heat conducting oil enters the oil outlet channel 15 through the heat conducting oil flow channel, it can flow out from the oil outlet 13 of the hot oil type rotary joint 8 upward through the oil outlet channel 15.

[0052] The lower end of the oil inlet pipe 14 is threadedly connected with the partition plate 7 and connected with the lower space through the communication hole formed in the partition plate 7.

[0053] The bottom of the lower space is connected with the inlet of the heat conducting oil flow channel through the connecting pipe 9. In use, the heat conducting oil flows to the bottom of the lower space through the oil inlet pipe 14 and flows into the heat conducting oil flow channel on the inner screw belt 3 and the outer screw belt 4 through the connecting pipe 9 at the bottom of the lower space. It can be understood that the outlet of the heat conducting oil flow channel can also be connected with the oil outlet channel 15 through the connecting pipe 9.

[0054] As shown in Figures 5 to 8 The heat conducting oil transmission structure 16 can be a coil, a jacket or a plate structure welded on the outer surface of the inner screw belt 3 or the outer screw belt 4. By welding the heat conducting oil flow channel on the outer surface of the inner screw belt 3 and the outer screw belt 4, the heat conducting oil can heat the stirring paddle, and the powder can be heated and dried while being stirred and turned by the stirring paddle.

[0055] The bottom of the kettle body 1 is provided with an annular nitrogen charging port 10.

[0056] The top of the kettle body 1 is provided with a bearing 6, and the main shaft 2 is installed in the bearing 6.

[0057] It also includes a motor 5, which is drivingly connected with the main shaft 2 through a transmission assembly 11 and used to drive the main shaft 2 to rotate.

[0058] Specifically, the transmission assembly 11 can be a chain transmission assembly, a gear transmission assembly or a belt transmission assembly.

[0059] The outer screw belt 4 is arranged around the outside of the inner screw belt 3, and the outer screw belt 4 is arranged concentrically with the inner screw belt 3.

[0060] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A drying kiln characterized by, The utility model relates to a kind of heat-conducting oil transmission structure and heat-conducting oil type rotary joint for stirring paddle of reactor, and the stirring paddle of reactor is provided with the heat-conducting oil transmission structure and the heat-conducting oil type rotary joint. It comprises: a kettle body and a stirring paddle arranged in the kettle body; the stirring paddle comprises a main shaft, an inner screw belt and an outer screw belt; the inner screw belt and the outer screw belt are both fixed on the main shaft, forming an inner and outer double screw belt structure; the main shaft is a hollow structure, and a partition is arranged in the main shaft, and the main shaft is divided into an upper space and a lower space by the partition; an oil inlet pipe is arranged in the upper space; the lower end of the oil inlet pipe is fixed on the partition, and the oil inlet pipe is communicated with the lower space, forming an oil inlet channel; an oil outlet channel is formed between the outer surface of the oil inlet pipe and the inner wall of the main shaft; the outer surface of the inner screw belt and the outer surface of the outer screw belt are both provided with a heat-conducting oil transmission structure; a heat-conducting oil flow channel is formed inside the heat-conducting oil transmission structure; the inlet of the heat-conducting oil flow channel is communicated with the lower space; 2. The drying kiln according to claim 1, characterized in that the outlet of the heat-conducting oil flow channel is communicated with the oil outlet channel. a heat-conducting oil type rotary joint is connected to the upper end of the main shaft; the oil inlet of the heat-conducting oil type rotary joint is communicated with the upper end of the oil inlet pipe; 3. The drying kiln of claim 1, wherein, the oil outlet of the heat-conducting oil type rotary joint is communicated with the oil outlet channel.

4. The drying kiln of claim 1, wherein, the lower end of the oil inlet pipe is threadedly connected to the partition, and is communicated with the lower space through a communication hole formed in the partition.

5. The drying kiln of claim 1, wherein, the lower space is connected to the inlet of the heat-conducting oil flow channel through a connecting pipe.

6. The drying kiln of claim 1, wherein, the heat-conducting oil transmission structure is a coil, a jacket or a plate structure welded on the outer surface of the inner screw belt or the outer screw belt.

7. The drying kiln of claim 1, wherein, a ring-shaped nitrogen charging port is arranged at the bottom of the kettle body. a bearing is arranged at the top of the kettle body; 8. The drying kiln of claim 1, wherein, the main shaft is installed in the bearing. It further comprises: a motor; 9. The drying kiln according to claim 8, characterized in that the motor is drivingly connected to the main shaft through a transmission assembly, for driving the main shaft to rotate.

10. The drying kiln of claim 1, wherein, the transmission assembly can be a chain transmission assembly, a gear transmission assembly or a belt transmission assembly. the outer screw belt is arranged around the outer side of the inner screw belt, and the outer screw belt is concentrically arranged with the inner screw belt.

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