Integral drying and baking rotary furnace

Abstract

This utility model relates to an integrated drying and baking rotary kiln, comprising an outer cylinder and an inner cylinder. The outer cylinder is fitted outside the inner cylinder and fixedly connected to it, defining a drying chamber between the outer and inner cylinders. The outer cylinder has a head end and a tail end opposite each other along its axial direction. The outer cylinder has a raw material inlet and a gas inlet at the head end and a gas outlet at the tail end. The inner side of the inner cylinder defines a baking chamber, with a feed inlet at one end near the tail end. The baking chamber and the drying chamber are connected through the feed inlet. The inner cylinder has a gaseous product outlet and a solid product outlet. This integrated drying and baking rotary kiln can simultaneously achieve the drying and baking processes of materials. Compared with integrated drying and baking rotary kilns in related technologies that achieve the same residence time for materials, it can reduce the overall length of the equipment, improve the space utilization of the equipment, and improve the heat exchange efficiency, thereby reducing the energy consumption of the integrated drying and baking rotary kiln.

Description

Technical Field

[0001] This utility model relates to the field of carbon-based raw material processing technology, specifically to an integrated drying and baking rotary oven. Background Technology

[0002] An integrated drying and baking rotary kiln is an industrial device that uses the rotation of the cylinder to continuously tumble the material and ensure full contact with the heat source, achieving uniform heat and mass transfer. It is widely used in high-temperature processing, particularly in metal ore roasting, hazardous and solid waste treatment, cement production, and new energy fields. For the treatment of carbon-based raw materials such as biomass and hazardous waste, drying and baking processes need to be performed simultaneously. However, integrated drying and baking rotary kilns in related technologies generally only perform one function, such as drying, incineration, calcination, pyrolysis, or carbonization, which is difficult to achieve when the process requirements are complex. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose an integrated drying and baking rotary oven, which can simultaneously realize the drying and baking processes of materials, reduce the overall length of the equipment, improve the space utilization of the equipment, and improve the heat exchange efficiency, thereby reducing the energy consumption of the integrated drying and baking rotary oven.

[0005] According to an embodiment of the present invention, an integrated drying and baking rotary oven includes an outer cylinder and an inner cylinder. The outer cylinder is fitted outside the inner cylinder and fixedly connected to it. A drying chamber is defined between the outer cylinder and the inner cylinder. The outer cylinder has a head end and a tail end opposite each other in its axial direction. The outer cylinder has a raw material inlet and a gas inlet at the head end and a gas outlet at the tail end. A baking chamber is defined on the inner side of the inner cylinder. The inner cylinder has a feed inlet at one end adjacent to the tail end. The baking chamber and the drying chamber are connected through the feed inlet. A gaseous product outlet and a solid product outlet are provided on the inner cylinder.

[0006] The integrated drying and baking rotary kiln of this utility model embodiment can simultaneously realize the drying and baking process of materials. Compared with the integrated drying and baking rotary kiln in related technologies that achieve the same residence (processing) time of materials, it can reduce the overall length of the equipment, improve the space utilization of the equipment, and improve the heat exchange efficiency, thereby reducing the energy consumption of the integrated drying and baking rotary kiln.

[0007] In some embodiments, the integrated drying and baking rotary oven further includes a guide member disposed inside the outer cylinder, one end of the guide member being connected to the tail end, and the other end of the guide member being adjacent to the feed inlet or extending into the feed inlet.

[0008] In some embodiments, the outer cylinder includes a first cylinder body, a fixing plate, and a first rotary seal. The first cylinder body is fitted onto the outside of the inner cylinder, and one end of the first cylinder body forms the tail end of the outer cylinder. The fixing plate is disposed at one end of the first cylinder body and is connected to one end of the first cylinder body through the first rotary seal. The fixing plate is provided with the gas outlet, and one end of the guide is disposed on the fixing plate.

[0009] In some embodiments, the guide includes a guide plate and a support plate, one end of the guide plate is connected to the fixed plate, the other end of the guide plate is adjacent to the inner cylinder or located inside the inner cylinder, the guide plate is axially opposite to the feed inlet, the guide plate is inclined to guide the material from the tail end to the feed inlet, and the support plate connects the guide plate and the fixed plate.

[0010] In some embodiments, the guide plate includes a flat plate portion and a curved plate portion. The middle portion of the guide plate is the flat plate portion. The angle between the flat plate portion and the axial direction of the first cylinder is 30°-60°. The curved plate portions are provided on both sides of the flat plate portion. The inner side of the curved plate portion is connected to the flat plate portion. The outer side of the curved plate portion is curved and raised. The outer side of the curved plate portion is located on the same plane as one end of the guide plate.

[0011] And / or, one end of the guide plate and the other end of the guide plate are respectively located on both sides of the feed inlet in its radial direction.

[0012] In some embodiments, the outer cylinder further includes a plurality of lifting scrapers, which are evenly distributed around the tail end of the outer cylinder along its circumference and surround the guide member. In the radial direction of the outer cylinder, the lifting scrapers are adjacent to the guide member.

[0013] In some embodiments, the outer cylinder further includes a feed ring, a second rotary seal, and a third rotary seal. The feed ring is disposed at the other end of the first cylinder and forms the first end of the outer cylinder. The feed ring is connected to the other end of the first cylinder through the second rotary seal. The feed ring is connected to the inner cylinder through the third rotary seal. The feed ring is provided with the raw material inlet and the gas inlet.

[0014] And / or, the fixed plate is provided with the gas outlet, and the outer cylinder further includes a filter screen, which is disposed at the gas outlet;

[0015] And / or, the integrated drying and baking rotary oven further includes a backflushing device, which is located at the gas outlet;

[0016] And / or, the outer cylinder further includes a first guide vane, the first guide vane being spiral-shaped and disposed inside the first cylinder body;

[0017] And / or, the outer cylinder further includes a heat-insulating and fire-resistant layer, which is disposed on the inner side of the first cylinder.

[0018] In some embodiments, the inner cylinder includes a second cylinder body and a limiting ring. The second cylinder body is fitted inside the outer cylinder. The limiting ring is provided at one end of the second cylinder body. The limiting ring is adjacent to the tail end. The limiting ring and the inner cylinder define a baking cavity on the side facing the head end. The limiting ring has a through hole and forms the feed port of the baking cavity.

[0019] In some embodiments, the inner cylinder further includes a fourth rotary seal and a discharge ring, the discharge ring being disposed at the other end of the second cylinder, the discharge ring being connected to the second cylinder via the fourth rotary seal, and the discharge ring having a gaseous product outlet and a solid product outlet.

[0020] In some embodiments, the inner cylinder further includes a second guide vane, which is spiral-shaped and disposed inside the second cylinder. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the integrated drying and baking rotary oven according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the integrated drying and baking rotary oven according to an embodiment of the present invention.

[0023] Figure 3 yes Figure 2 A magnified schematic diagram of the local structure;

[0024] Figure 4 This is a structural schematic diagram of the tail end of the outer cylinder and the guide member of an embodiment of this utility model.

[0025] Figure label:

[0026] 100. Integrated drying and baking rotary oven; 1001. Drying chamber; 1002. Baking chamber;

[0027] 1. Outer cylinder; 101. Raw material inlet; 102. Gas inlet; 103. Gas outlet; 11. First cylinder body; 12. Fixed plate; 13. First rotary seal; 14. Lifting scraper; 15. Feed ring; 16. Second rotary seal; 17. Third rotary seal; 18. Filter screen; 19. First guide vane; 110. Support rod; 111. Backflush device;

[0028] 2. Inner cylinder, 201. Feed inlet, 202. Gaseous product outlet, 203. Solid product outlet, 21. Second cylinder, 22. Material limiting ring, 23. Fourth rotary seal, 24. Discharge ring, 25. Second guide vane;

[0029] 3. Guide component, 31. Guide plate, 311. Flat plate part, 312. Curved plate part, 32. Support plate. Detailed Implementation

[0030] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The following is a reference to the appendix. Figures 1 to 4 This invention describes in detail the integrated drying and baking rotary oven 100 of this utility model embodiment.

[0032] The integrated drying and baking rotary oven 100 of this utility model embodiment includes an inner cylinder 2 and an outer cylinder 1. The outer cylinder 1 is fitted outside the inner cylinder 2 and fixedly connected to the inner cylinder 2. A drying chamber 1001 is defined between the outer cylinder 1 and the inner cylinder 2. The outer cylinder 1 has opposing ends in its axial direction (e.g., ...). Figure 1 and Figure 2 (left end) and tail end (e.g.) Figure 1 and Figure 2 The outer cylinder 1 (located at the right end of the inner cylinder) has a raw material inlet 101 and a gas inlet 102 at its first end, and a gas outlet 103 at its last end. The raw material inlet 101, gas inlet 102, and gas outlet 103 are all connected to the drying chamber 1001. The inner cylinder 2 defines the baking chamber 1002 on its inner side. The inner cylinder 2 has a feed inlet 201 near its last end. The baking chamber 1002 is connected to the drying chamber 1001 through the feed inlet 201. The inner cylinder 2 has a gaseous product outlet 202 and a solid product outlet 203, both of which are connected to the baking chamber 1002.

[0033] In use, the integrated drying and baking rotary oven 100 of this utility model allows carbon-based raw materials, including wet biomass and solid hazardous waste, to enter the drying chamber 1001 through the raw material inlet 101. High-temperature gas enters the drying chamber 1001 through the gas inlet 102. The high-temperature gas and carbon-based raw materials mix within the drying chamber 1001. The rotating outer cylinder 1 causes the carbon-based raw materials to continuously accumulate, rise, tumble, and move towards the tail end within the drying chamber 1001. The carbon-based raw materials and high-temperature gas are in full contact for direct heat exchange. The high-temperature gas heats the inner cylinder 2 while simultaneously heating the carbon-based raw materials, thereby heating the baking chamber 1002. When the carbon-based raw materials reach the tail end, drying is complete. Most of the water vapor and low-temperature gas generated during drying are discharged through the gas outlet 103. The dried carbon-based raw materials gradually accumulate at the second end of the outer cylinder 1. As the outer cylinder 1 continues to rotate, the accumulated carbon-based raw materials gradually increase and slide down from the feed inlet 201 into the baking chamber 1002. The rotating outer cylinder 1 drives the inner cylinder 2 to rotate. The rotating inner cylinder 2 causes the dried raw material to be continuously lifted, tumbled and moved towards the other end (the end of the inner cylinder 2 near the first end) in the baking chamber 1002, making full contact with the high temperature inner cylinder 2 for heat exchange. At the same time as heat exchange, baking gaseous products are released. When the carbon-based raw material moves to the solid product outlet 203, the drying of the raw material is completed. The baking gaseous products are discharged from the gaseous product outlet 202, and the baking solid products are discharged from the solid product outlet 203.

[0034] The integrated drying and baking rotary kiln 100 of this utility model, through a sleeve structure of inner cylinder 2 and outer cylinder 1, divides the interior of the integrated drying and baking rotary kiln 100 into a drying chamber 1001 located on the outer side and a baking chamber 1002 located on the inner side. The drying chamber 1001 and the baking chamber 1002 are connected at the tail end of the outer cylinder 1. The outer cylinder 1 is provided with a raw material inlet 101 and the inner cylinder 2 is provided with a solid product outlet 203, thereby forming a double-pass material flow path with the outside in and the inside out. At the same time, the outer cylinder 1 is provided with a gas inlet 102, and carbon-based raw materials and high-temperature gas enter the drying chamber 1001 from the outer cylinder 1. On the one hand, in the drying chamber 1001, the high-temperature gas directly contacts the carbon-based raw materials for drying. Compared with the related technology of indirectly heating and drying materials through a heating cylinder, it has higher heat exchange efficiency and ensures the drying effect of carbon-based raw materials; on the other hand, On the one hand, in the drying chamber 1001, the high-temperature gas also heats the inner cylinder 2, thereby heating the baking chamber 1002 and baking the dried carbon-based raw materials in the baking chamber 1002, thus realizing the drying and baking process of the carbon-based raw materials; on the other hand, the material requires more heat to complete the drying in the drying section and less heat to complete the baking in the baking section. The carbon-based raw materials are first dried in the drying chamber 1001 and then baked in the baking chamber 1002. Taking advantage of the characteristic that the baking stage does not require more heat than the drying stage, the thermal energy of the high-temperature gas is fully utilized. Furthermore, the drying chamber 1001 and the baking chamber 1002 are set in sections, which makes it easier to control the residence time of the carbon-based raw materials in the drying chamber 1001 and the residence time in the baking chamber 1002 separately, thereby helping to control the processing temperature of the carbon-based raw materials and ensuring the drying and baking effect of the carbon-based raw materials.

[0035] Therefore, the integrated drying and baking rotary oven 100 of this utility model embodiment can simultaneously realize the drying and baking process of materials. Compared with the integrated drying and baking rotary oven 100 in related technologies that realizes the same residence (processing) time of materials, it can reduce the overall length of the equipment, improve the space utilization of the equipment, and improve the heat exchange efficiency, thereby reducing the energy consumption of the integrated drying and baking rotary oven 100.

[0036] In some embodiments, the inner cylinder 2 includes a second cylinder body 21 and a limiting ring 22. The second cylinder body 21 is fitted inside the outer cylinder 1. One end of the second cylinder body 21 is provided with a limiting ring 22. The limiting ring 22 is adjacent to the tail end. The limiting ring 22 defines a baking cavity 1002 on the side facing the head end (i.e., the left side of the limiting ring 22) and the inner cylinder 2. The limiting ring 22 has a through hole and forms an inlet 201 for the baking cavity 1002. The through-hole of the limiting ring 22 is smaller than the inner diameter of the second cylinder 21. The inner cylinder 2 is fed through the through-hole of the limiting ring 22, thereby reducing the opening size at that end of the second cylinder 21. This reduces the exchange efficiency of materials (carbon-based raw materials and gases) between the baking chamber 1002 and the drying chamber 1001, which helps increase the residence time of the carbon-based raw materials in the drying chamber 1001, ensuring the drying intensity and effect of the carbon-based raw materials. Furthermore, when the carbon-based raw materials enter the baking chamber 1002 from the tail end of the outer cylinder 1 through the feed inlet 201, they also occupy a certain space in the feed inlet 201. Furthermore, the flow of gas through the feed inlet 201 between the drying chamber 1001 and the baking chamber 1002 is further reduced, thereby reducing the entry of water vapor and low-temperature gas formed after heat exchange into the baking chamber 1002. It also reduces the gaseous products generated in the baking chamber 1002 during the baking of carbon-based raw materials from the feed inlet 201 into the drying chamber 1001. This facilitates the separate discharge of gaseous products generated in the baking chamber 1002 and water vapor and low-temperature gas generated in the drying chamber 1001, thereby ensuring that the calorific value of the gaseous products is not lost and facilitating the reuse of the gaseous products.

[0037] In some embodiments, the integrated drying and baking rotary oven 100 further includes a guide member 3, which is disposed inside the outer cylinder 1. One end of the guide member 3 is connected to the tail end, and the other end of the guide member 3 is adjacent to or extends into the feed inlet 201. The guide member 3 protrudes from the tail end of the outer cylinder 1. As the outer cylinder 1 rotates, the carbon-based raw material at the tail end flips and falls down. The carbon-based raw material falling onto the guide member 3 flows along the guide member 3 to the feed inlet 201 or into the feed inlet 201, thereby ensuring that the carbon-based raw material enters the baking chamber 1002 and ensuring the smooth flow of the carbon-based raw material from the drying chamber 1001 to the baking chamber 1002.

[0038] Furthermore, the outer cylinder 1 includes a first cylinder body 11, a fixing plate 12, and a first rotary seal 13. The first cylinder body 11 is fitted onto the outside of the inner cylinder 2. Specifically, a rotary support component is provided on the outside of the first cylinder body 11 to drive the first cylinder body 11 to rotate. A second cylinder body 21 is fitted onto the inside of the first cylinder body 11, and several support rods 110 are provided on the inside of the first cylinder body 11. The support rods 110 connect the first cylinder body 11 and the second cylinder body 21 to ensure the fixation and synchronous rotation of the second cylinder body 21 and the first cylinder body 11. One end of the first cylinder body 11 forms the tail end of the outer cylinder 1, and the fixing plate 12 is provided at this end of the first cylinder body 11. The fixing plate 12 is connected to one end of the first cylinder body 11 through the first rotary seal 13. The fixing plate 12 is provided with a gas outlet 103, and one end of the guide member 3 is provided on the fixing plate 12.

[0039] The fixed plate 12 is connected to the first cylinder 11 via the first rotary seal 13, so that the fixed plate 12 does not rotate when the first cylinder 11 rotates. This facilitates the connection of the gas outlet 103 on the fixed plate 12 to the external pipeline, which is convenient for the collection and reprocessing of water vapor and low-temperature gas. At the same time, the guide 3 does not rotate and remains stationary. This not only continuously guides the carbon-based raw materials falling from above, ensuring that the carbon-based raw materials enter the baking chamber 1002, but also ensures the sealing performance of the drying chamber 1001.

[0040] The outer cylinder 1 further includes a feed ring 15, a second rotary seal 16, and a third rotary seal 17. The feed ring 15 is located at the other end (left end) of the first cylinder 11 and forms the first end of the outer cylinder 1. The feed ring 15 is connected to the other end of the first cylinder 11 through the second rotary seal 16, and the feed ring 15 is connected to the second cylinder 21 of the inner cylinder 2 through the third rotary seal 17. The feed ring 15 is provided with a raw material inlet 101 and a gas inlet 102. Thus, when the first cylinder 11 rotates, the feed ring 15 does not rotate, thereby facilitating the connection between the raw material inlet 101 and external equipment, and the gas inlet 102 and external pipelines, while ensuring the sealing performance of the drying chamber 1001.

[0041] The outer cylinder 1 further includes a heat-insulating and refractory layer, which is disposed on the inner side of the first cylinder 11. The heat-insulating and refractory layer facilitates the heat preservation of the first cylinder 11, helps reduce the flow and loss of heat to the outside, and reduces the energy consumption of the integrated drying and baking rotary oven 100 of this embodiment. It should be noted that no heat-insulating and refractory material is provided on the outer and inner sides of the second cylinder 21, which helps the heat of the high-temperature gas in the drying chamber 1001 to be transferred to the second cylinder 21 and to heat the baking chamber 1002, thereby baking the carbon-based raw materials in the baking chamber 1002.

[0042] The outer cylinder 1 further includes a first guide vane 19, which is spiral-shaped and located inside the first cylinder body 11. As the first cylinder body 11 rotates, the first guide vane 19 can lift and tumble the carbon-based raw material from the bottom of the first cylinder body 11, which not only pushes the carbon-based raw material from the beginning to the end, but also facilitates full contact and heat exchange between the material and the high-temperature gas.

[0043] Specifically, the axial angle between the first guide vane 19 and the first cylinder 11 is 30°-60°. The axial angle between the first guide vane 19 and the first cylinder 11 is related to the tumbling frequency of the material by the first guide vane 19, affecting the speed at which the material moves from the beginning to the end, and thus affecting the residence time of the material in the drying chamber 1001. Therefore, based on the properties of the material, such as its moisture content, the required drying time is determined, and an appropriate axial angle between the first guide vane 19 and the first cylinder 11 of the integrated drying and baking rotary oven 100 is selected to ensure the drying effect of the integrated drying and baking rotary oven 100 on the material.

[0044] For example, the included angle between the first guide vane 19 and the first cylinder 11 along their axes is 30°, 35°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 45°, 50°, 55° or 60°.

[0045] like Figures 2 to 4 As shown, the outer cylinder 1 further includes multiple lifting scrapers 14. These multiple lifting scrapers 14 are evenly distributed around the tail end of the first cylinder body 11 of the outer cylinder 1 along the circumference of the outer cylinder 1. The multiple lifting scrapers 14 surround the guide member 3, and are adjacent to the guide member 3 in the radial direction of the outer cylinder 1. As the first cylinder body 11 rotates, the lifting scrapers 14 can lift the dried carbon-based raw material at the tail end of the drying chamber 1001 above the deflecting guide member 3, so that the dried carbon-based raw material falls onto the guide member 3 under the action of gravity, ensuring the smooth flow of the carbon-based raw material from the drying chamber 1001 to the baking chamber 1002.

[0046] Specifically, the lifting scraper 14 is connected to the end of the first guide vane 19 (the end near the tail end). The radial dimension of the lifting scraper 14 in the first cylinder 11 is larger than the radial dimension of the first guide vane 19 in the first cylinder 11, and the extension direction of the lifting scraper 14 is parallel to the axial direction of the first cylinder 11. Multiple lifting scrapers 14 surround the guide member 3, thereby increasing the probability that the material flipped by the lifting scraper 14 onto the upper side of the guide member 3 will fall onto the guide member 3.

[0047] Furthermore, the guide member 3 includes a guide plate 31 and a support plate 32. One end (right end) of the guide plate 31 is connected to the fixed plate 12, and the other end (left end) of the guide plate 31 is adjacent to or located inside the inner cylinder 2. The guide plate 31 is axially opposite to the feed inlet 201. The guide plate 31 is inclined to guide the material from the tail end to the feed inlet 201. The support plate 32 connects the guide plate 31 and the fixed plate 12. Specifically, the height of one end of the guide plate 31 is higher than the height of the other end of the guide plate 31. The upper side of the guide plate 31 receives the material, which slides down to the other end of the guide plate 31 under gravity and then enters the baking chamber 1002 through the feed inlet 201. The lower side of the guide plate 31 is supported and fixed by the support plate 32, so that at least a portion of the lower side of the guide plate 31 is spaced apart from the fixed plate 12, ensuring the unobstructed flow of the gas outlet 103 on the fixed plate 12.

[0048] The guide component 3 has a simple structure, is easy to process, manufacture and install, which helps to reduce the manufacturing cost of the integrated drying and baking rotary oven 100 of this utility model embodiment.

[0049] Specifically, the other end of the guide plate 31 is adjacent to the limiting ring 22. The guide plate 31 and the feed inlet 201 are opposite each other in their axial direction (which is also the axial direction of the first cylinder 11 and the second cylinder 21). One end of the guide plate 31 and the other end of the guide plate 31 are respectively located on both sides of the feed inlet 201 in its radial direction, that is, the other end of the guide plate 31 is located on the lower side of the feed inlet 201, and the other end of the guide plate 31 is located on the upper side of the feed inlet 201. The limiting ring 22 and the guide plate 31 form a bucket-shaped space, which also facilitates the accumulation of materials on the guide plate 31. The accumulated materials form a sealed buffer zone for the feed inlet 201, further reducing the exchange of gas between the drying chamber 1001 and the baking chamber 1002 through the feed inlet 201, preventing the gaseous products of the baking chamber 1002 from sneaking to the gas outlet 103, preventing the water vapor and low-temperature gas of the drying chamber 1001 from sneaking to the baking chamber 1002, further ensuring that the calorific value of the gaseous products does not decrease, and further facilitating the reuse of the gaseous products.

[0050] Furthermore, such as Figure 4As shown, the guide plate 31 includes a flat plate portion 311 and a curved plate portion 312. The middle part of the guide plate 31 is the flat plate portion 311, and the included angle between the flat plate portion 311 and the axial direction of the first cylinder 11 is 45°-60°. Curved plate portions 312 are provided on both sides of the flat plate portion 311. The inner side of the curved plate portion 312 is connected to the flat plate portion 311, and the outer side of the curved plate portion 312 is curved and raised. The outer side of the curved plate portion 312 is located on the same plane as one end of the guide plate 31. Thus, the flat plate portion 311 and the curved plate portions 312 on both sides form a groove, which further ensures that the dried carbon-based raw material falling on the guide plate 31 will not fall to the lower part of the first cylinder 11, further facilitates the accumulation of material between the guide plate 31 and the limiting ring, further reduces the exchange of gas between the drying chamber 1001 and the baking chamber 1002 through the feed inlet 201, further ensures that the calorific value of the gaseous product does not decrease, and further facilitates the reuse of the gaseous product.

[0051] Specifically, the included angle between the flat plate portion 311 and the first cylindrical body 11 along its axis is 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, or 60°.

[0052] Specifically, the fixed plate 12 is provided with a gas outlet 103, and the outer cylinder 1 further includes a filter screen 18, which is located at the gas outlet 103. The filter screen 18 can prevent finer dry raw materials from being carried into the gas outlet 103 by the low-temperature gas, thus avoiding material loss.

[0053] Specifically, the mesh diameter of filter 18 is 0.1-10mm.

[0054] The integrated drying and baking rotary oven 100 further includes a backflushing device 111, which is located at the gas outlet 103. Specifically, the backflushing device 111 is installed on the outside of the filter screen 18. Regularly opening the backflushing device can clean the dried raw material in the gaps of the filter screen 18, avoid clogging of the filter screen 18, and ensure that the gas can be smoothly discharged from the gas outlet 103.

[0055] The inner cylinder 2 further includes a second guide vane 25, which is spiral-shaped and disposed inside the second cylinder 21. The direction of rotation of the second guide vane 25 is opposite to that of the first guide vane 19. As the second cylinder 21 rotates, the second guide vane 25 can lift and tumble the carbon-based raw material from the bottom of the second cylinder 21, not only pushing the carbon-based raw material from one end of the second cylinder 21 to the other end, but also facilitating sufficient contact and heat exchange between the material and the second cylinder 21.

[0056] Specifically, the included angle between the second guide vane 25 and the second cylinder 21 is 30°-60°. Based on the properties of the material, such as its moisture content, the required baking time is determined, and an appropriate included angle between the second guide vane 25 and the second cylinder 21 of the integrated drying and baking rotary oven 100 is selected to ensure the baking effect of the integrated drying and baking rotary oven 100 on the material.

[0057] For example, the included angle between the second guide vane 25 and the second cylinder 21 is 30°, 35°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 45°, 50°, 55° or 60°.

[0058] In some embodiments, the inner cylinder 2 further includes a fourth rotary seal 23 and a discharge ring 24. The discharge ring 24 is disposed at the other end of the second cylinder 21 and is connected to the second cylinder 21 via the fourth rotary seal 23. The discharge ring 24 is provided with a gaseous product outlet 202 and a solid product outlet 203. The discharge ring 24 is connected to the second cylinder 21 via the fourth rotary seal 23, so that when the second cylinder 21 rotates, the discharge ring 24 does not rotate, thereby facilitating the connection between the solid product outlet 203 on the discharge ring 24 and external equipment, and the connection between the gaseous product outlet 202 and external pipelines, while ensuring the sealing performance of the baking chamber 1002.

[0059] As one embodiment, the discharge ring 24 is fitted on the outside of the other end of the second cylinder 21. The discharge ring 24 is located on the side of the feed ring 15 away from the tail end, that is, the discharge ring 24 is located on the left side of the feed ring 15. The discharge ring 24 and the feed ring 15 are fixedly connected. The fourth rotary seal 23 and the third rotary seal 17 are the same rotary seal.

[0060] Specifically, the first rotary seal 13, the second rotary seal 16, and the third rotary seal 17 (the fourth rotary seal 23) are all sealed bearings.

[0061] The integrated drying and baking rotary oven 100 of this utility model embodiment further includes a first pressure sensor and a second pressure sensor. The detection contact of the first pressure sensor is located at the gas outlet 103, and the detection contact of the second pressure sensor is located at the feed inlet 201, thereby detecting the pressure of the gas outlet 103 and the pressure of the feed inlet 201, thereby assisting personnel in judging the gas flow in the integrated drying and baking rotary oven 100, and adjusting the rotation speed, high-temperature gas inlet pressure and flow rate of the integrated drying and baking rotary oven 100 to ensure the best drying and baking effect.

[0062] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0065] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An integrated drying and baking rotary furnace (100), characterized in that, The device includes an outer cylinder (1) and an inner cylinder (2). The outer cylinder (1) is fitted on the outside of the inner cylinder (2) and is fixedly connected to the inner cylinder (2). A drying chamber is defined between the outer cylinder (1) and the inner cylinder (2). The outer cylinder (1) has a head end and a tail end opposite to each other in its axial direction. The outer cylinder (1) has a raw material inlet (101) and a gas inlet (102) at the head end. The outer cylinder (1) has a gas outlet (103) at the tail end. A baking chamber is defined on the inner side of the inner cylinder (2). The inner cylinder (2) has a feed inlet (201) at one end near the tail end. The baking chamber and the drying chamber are connected through the feed inlet (201). The inner cylinder (2) has a gaseous product outlet (202) and a solid product outlet (203).

2. The integrated drying and baking rotary furnace (100) according to claim 1, characterized in that, It further includes a guide (3) which is disposed inside the outer cylinder (1). One end of the guide (3) is connected to the tail end, and the other end of the guide (3) is adjacent to the feed inlet (201) or extends into the feed inlet (201).

3. The integrated drying and baking rotary oven (100) according to claim 2, characterized in that, The outer cylinder (1) includes a first cylinder body (11), a fixing plate (12), and a first rotary seal (13). The first cylinder body (11) is fitted on the outside of the inner cylinder (2). One end of the first cylinder body (11) forms the tail end of the outer cylinder (1). The fixing plate (12) is located at one end of the first cylinder body (11). The fixing plate (12) is connected to one end of the first cylinder body (11) through the first rotary seal (13). The fixing plate (12) is provided with the gas outlet (103). One end of the guide (3) is located on the fixing plate (12).

4. The integrated drying and baking rotary oven (100) according to claim 3, characterized in that, The guide (3) includes a guide plate (31) and a support plate (32). One end of the guide plate (31) is connected to the fixed plate (12), and the other end of the guide plate (31) is adjacent to the inner cylinder (2) or located inside the inner cylinder (2). The guide plate (31) and the feed inlet (201) are opposite each other in their axial direction. The guide plate (31) is inclined to guide the material from the tail end to the feed inlet (201). The support plate (32) connects the guide plate (31) and the fixed plate (12).

5. The integrated drying and baking rotary oven (100) according to claim 4, characterized in that, The guide plate (31) includes a flat plate portion (311) and a curved plate portion (312). The middle part of the guide plate (31) is the flat plate portion (311). The angle between the flat plate portion (311) and the axial direction of the first cylinder (11) is 30°-60°. The curved plate portion (312) is provided on both sides of the flat plate portion (311). The inner side of the curved plate portion (312) is connected to the flat plate portion (311). The outer side of the curved plate portion (312) is curved and raised. The outer side of the curved plate portion (312) is on the same plane as one end of the guide plate (31). And / or, one end of the guide plate (31) and the other end of the guide plate (31) are respectively located on both sides of the feed inlet (201) in its radial direction.

6. The integrated drying and baking rotary oven (100) according to claim 3, characterized in that, The outer cylinder (1) further includes a lifting scraper (14), which has a plurality of lifting scrapers (14). The plurality of lifting scrapers (14) are evenly arranged along the circumference of the outer cylinder (1) at the tail end of the outer cylinder (1). The plurality of lifting scrapers (14) surround the guide member (3). In the radial direction of the outer cylinder (1), the lifting scraper (14) is adjacent to the guide member (3).

7. The integrated drying and baking rotary oven (100) according to claim 3, characterized in that, The outer cylinder (1) further includes a feed ring (15), a second rotary seal (16) and a third rotary seal (17). The feed ring (15) is located at the other end of the first cylinder (11) and forms the first end of the outer cylinder (1). The feed ring (15) is connected to the other end of the first cylinder (11) through the second rotary seal (16). The feed ring (15) is connected to the inner cylinder (2) through the third rotary seal (17). The feed ring (15) is provided with the raw material inlet (101) and the gas inlet (102). And / or, the fixed plate (12) is provided with the gas outlet (103), and the outer cylinder (1) further includes a filter screen (18), which is provided at the gas outlet (103); And / or, the integrated drying and baking rotary oven (100) further includes a backflushing device (111) disposed at the gas outlet (103); And / or, the outer cylinder (1) further includes a first guide vane (19), the first guide vane (19) being spiral-shaped and disposed inside the first cylinder body (11); And / or, the outer cylinder (1) further includes a heat-insulating and fire-resistant layer, which is disposed on the inner side of the first cylinder (11).

8. The integrated drying and baking rotary oven (100) according to claim 1, characterized in that, The inner cylinder (2) includes a second cylinder body (21) and a limiting ring (22). The second cylinder body (21) is fitted inside the outer cylinder (1). The limiting ring (22) is provided at one end of the second cylinder body (21). The limiting ring (22) is adjacent to the tail end. The limiting ring (22) and the inner cylinder (2) define a baking cavity on the side facing the head end. The limiting ring (22) has a through hole and forms the inlet (201) of the baking cavity.

9. The integrated drying and baking rotary oven (100) according to claim 8, characterized in that, The inner cylinder (2) further includes a fourth rotary seal (23) and a discharge ring (24). The discharge ring (24) is located at the other end of the second cylinder (21). The discharge ring (24) is connected to the second cylinder (21) through the fourth rotary seal (23). The discharge ring (24) is provided with a gaseous product outlet (202) and a solid product outlet (203).

10. The integrated drying and baking rotary oven (100) according to claim 9, characterized in that, The inner cylinder (2) further includes a second guide vane (25), which is spiral in shape and is disposed inside the second cylinder (21).

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