Integrated waste heat recovery device

Abstract

This utility model discloses an integrated waste heat recovery and utilization device, including an inner cylinder, an outer cylinder, a feed sealing cover, and a discharge sealing cover. Both the inner and outer cylinders are cylindrical structures, with the inner cylinder located inside the outer cylinder. The feed sealing cover and discharge sealing cover are respectively located at both ends of the outer cylinder. The feed sealing cover is equipped with a feed-end inner cylinder sealing device for sealing the feed end of the inner cylinder. The bottom plate of the discharge sealing cover has a through hole, and a cold air conveying axial flow fan is installed at the through hole. The discharge sealing cover has an inner annular air duct in a circular shape, and the side of the inner annular air duct furthest from the discharge sealing cover is aligned with the gap between the outer and inner cylinders. An inner cylinder return air port is opened on the side wall of the inner cylinder near the feed sealing cover. This integrated waste heat recovery and utilization device has a reasonable structural design and air duct design, enabling rapid heat circulation within the device and achieving efficient heat utilization. It also achieves effective separation of materials in the inner and outer cylinders, independent feed and discharge, good applicability, and promising application prospects.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln technology, and to an integrated waste heat recovery and utilization device, particularly to an integrated waste heat recovery and utilization device based on a double-cylinder rotary kiln. Background Technology

[0002] A rotary kiln is a rotating calcining kiln (commonly known as a rotary kiln), resembling a rotating bed in shape. Currently, most rotary kilns are single-cylinder. While single-cylinder rotary kilns have the advantage of simple structure, their processing efficiency still has significant room for improvement. A double-cylinder rotary kiln is a newer type of rotary kiln structure. Its inner cylinder can process high-temperature materials, while the outer cylinder processes low-temperature materials. The high-temperature material in the inner cylinder transfers heat to the low-temperature material in the outer cylinder through radiation, effectively improving the thermal efficiency of the equipment to a certain extent. However, current double-cylinder rotary kiln designs still have some shortcomings: 1) low utilization rate of waste heat from the inner cylinder; 2) easy mixing of materials discharged from the inner and outer cylinders.

[0003] Therefore, developing a double-cylinder rotary kiln structure with high waste heat utilization and the ability to separate the material discharge between the inner and outer cylinders is of great practical significance. Utility Model Content

[0004] Due to the aforementioned defects in the existing technology, this utility model provides a double-cylinder rotary kiln structure with high waste heat utilization rate and the ability to separate the material discharge between the inner and outer cylinders. Specifically, it is an integrated waste heat recovery and utilization device based on a double-cylinder rotary kiln.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An integrated waste heat recovery and utilization device includes an inner cylinder, an outer cylinder, a feed sealing cover, and a discharge sealing cover;

[0007] Both the inner and outer cylinders are cylindrical structures, with the inner cylinder arranged inside the outer cylinder;

[0008] The feed sealing cover and the discharge sealing cover are respectively arranged at both ends of the outer cylinder;

[0009] The feed sealing cover is equipped with a feed end inner cylinder sealing device for sealing the feed end of the inner cylinder;

[0010] The bottom plate of the discharge sealing cover has a through hole and a cold air conveying axial flow fan is installed at the through hole. The discharge sealing cover has an inner ring-shaped air duct, and the side of the inner ring-shaped air duct away from the discharge sealing cover is aligned with the gap between the outer cylinder and the inner cylinder. The top of the inner ring-shaped air duct is connected to the smoke exhaust channel, and the smoke exhaust channel extends out from the discharge sealing cover. The bottom of the inner ring-shaped air duct is connected to the ash discharge pipe, and the ash discharge pipe extends out from the discharge sealing cover. The bottom of the discharge sealing cover has an inner cylinder discharge port and an outer cylinder discharge port located on both sides of the separating device.

[0011] An inner cylinder return air vent is provided on the side wall near the feed sealing end of the inner cylinder.

[0012] The operating logic of the above-mentioned integrated waste heat recovery and utilization device is as follows:

[0013] The integrated waste heat recovery and utilization device adopts an inner and outer double cylinder design. The material in the inner cylinder can be high-temperature material, while the material in the outer cylinder can be tailings, construction waste, contaminated soil, or other materials with a moisture content of about 20%. The high-temperature material inside transfers heat to the outer cylinder through radiation, heating the material in the outer cylinder and evaporating the moisture. The cold air conveying axial flow fan on the discharge cover sends external cold air into the inner cylinder. The cold air is heated by the high temperature in the inner cylinder and flows from the discharge end to the feed end within the inner cylinder. It then flows into the outer cylinder through the inner cylinder return air port opened on the side wall of the inner cylinder. The air in the outer cylinder flows from the feed end to the discharge end, carrying away the water vapor generated by the drying material. The device has a reasonable internal air duct design, which can realize rapid heat circulation within the device and achieve efficient utilization of heat.

[0014] This utility model's integrated waste heat recovery and utilization device has a reasonable structural design and air duct design, which can realize rapid heat circulation within the device and achieve efficient utilization of heat. It can effectively separate the materials in the inner and outer cylinders, and its discharge and feeding are independent, which can distinguish the feeding and discharging of different materials. The design is reasonable, has good applicability, and has great application prospects.

[0015] As a preferred technical solution:

[0016] In the integrated waste heat recovery and utilization device described above, the cold air conveying axial flow fan delivers air from the discharge closed cover to the feed closed cover.

[0017] As described above, in an integrated waste heat recovery and utilization device, the inner cylinder outlet is located near the outer cylinder side of the separating device;

[0018] The outer cylinder outlet is located on the side of the separator away from the outer cylinder.

[0019] As described above, in an integrated waste heat recovery and utilization device, the inner cylinder sealing device at the feed end divides the space enclosed by the feed sealing cover and the outer cylinder into two independent spaces.

[0020] As described above, in an integrated waste heat recovery and utilization device, the feed sealing cover has an outer cylinder feed port, and the inner cylinder feed pipe penetrates the feed sealing cover and the inner cylinder sealing device at the feed end and communicates with the inner cylinder.

[0021] As described above, in an integrated waste heat recovery and utilization device, the inner annular air duct is coaxial with the discharge sealing cover and does not contact the bottom plate of the discharge sealing cover. A partition device is also provided between the inner annular air duct and the discharge sealing cover to divide the space inside the discharge sealing cover into two independent spaces.

[0022] As described above, in an integrated waste heat recovery and utilization device, a ring of inner cylinder lifting plates is installed on the inner wall of the inner cylinder, arranged around its axis of symmetry.

[0023] The inner wall of the outer cylinder is fitted with a ring of lifting plates arranged around its axis of symmetry. The lifting plates at different angles on the inner and outer cylinders allow the material to tumble and exchange heat fully. During the rotation of the rotary kiln, the material moves from the feed inlet to the discharge outlet, completing the heat exchange.

[0024] As described above, in an integrated waste heat recovery and utilization device, the inner cylinder and the outer cylinder are coaxial, and the outer diameter of the inner cylinder is smaller than the inner diameter of the outer cylinder.

[0025] The above technical solution is only one feasible technical solution of this utility model. The protection scope of this utility model is not limited to this. Those skilled in the art can reasonably adjust the specific design according to actual needs.

[0026] Compared with the prior art, the above-mentioned utility model has the following advantages or beneficial effects:

[0027] (1) The integrated waste heat recovery and utilization device of this utility model has a reasonable structural design and a reasonable air duct design, which can realize rapid heat circulation in the device and achieve efficient utilization of heat.

[0028] (2) The integrated waste heat recovery and utilization device of this utility model can effectively separate the materials in the inner and outer cylinders. Its discharge and feeding are independent, and it can distinguish the feeding and discharging of different materials. It is reasonably designed, has good applicability, and has great application prospects. Attached Figure Description

[0029] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn strictly to scale; the focus is on illustrating the main idea of ​​the invention.

[0030] Figure 1 This is a schematic diagram of the integrated waste heat recovery and utilization device of this utility model;

[0031] Figures 2-7 They are respectively Figure 1 Cross-sectional views at positions A, B, C, D, E, and F;

[0032] Among them, 1 is the outer cylinder, 2 is the inner cylinder, 3 is the outer cylinder lifting plate, 4 is the inner cylinder lifting plate, 5 is the feed sealing cover, 6 is the feed end inner cylinder sealing device, 7 is the inner cylinder feed pipe, 8 is the outer cylinder feed port, 9 is the cold air conveying axial flow fan, 10 is the discharge sealing cover, 11 is the smoke exhaust channel, 12 is the inner ring annular air duct, 13 is the inner cylinder discharge port, 14 is the ash discharge pipe, 15 is the outer cylinder discharge port, and 16 is the inner cylinder return air port. Detailed Implementation

[0033] The structure of this utility model will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the utility model.

[0034] Example 1

[0035] An integrated waste heat recovery and utilization device, such as Figures 1-7 As shown, it includes an inner cylinder 2, an outer cylinder 1, a feed sealing cover 5, and a discharge sealing cover 10;

[0036] Both the inner cylinder 2 and the outer cylinder 1 are cylindrical structures. The inner cylinder 2 is arranged inside the outer cylinder 1. The inner cylinder 2 and the outer cylinder 1 are coaxial and the outer diameter of the inner cylinder 2 is smaller than the inner diameter of the outer cylinder 1.

[0037] The feed sealing cover 5 and the discharge sealing cover 10 are respectively arranged at both ends of the outer cylinder 1;

[0038] The feed sealing cover 5 is provided with a feed end inner cylinder sealing device 6 for sealing the feed end of the inner cylinder. The feed end inner cylinder sealing device 6 divides the space enclosed by the feed sealing cover 5 and the outer cylinder 1 into two independent spaces. The feed sealing cover 5 has an outer cylinder feed port 8. The inner cylinder feed pipe 7 penetrates the feed sealing cover 5 and the feed end inner cylinder sealing device 6 and communicates with the inner cylinder 2.

[0039] The bottom plate of the discharge sealing cover 10 has a through hole, and a cold air conveying axial flow fan 9 is installed at the through hole. The cold air conveying axial flow fan 9 delivers air from the discharge sealing cover 10 to the inlet sealing cover 5. The discharge sealing cover 10 has an inner annular air duct 12 in a circular shape. The side of the inner annular air duct 12 away from the discharge sealing cover 5 is aligned with the gap between the outer cylinder 1 and the inner cylinder 2. The inner annular air duct 12 is coaxial with the discharge sealing cover 10 and does not contact the bottom plate of the discharge sealing cover. There is also a space between the inner annular air duct 12 and the discharge sealing cover 10 to guide the discharge sealing cover. The space inside 10 is divided into two independent spaces by a partition device. The top of the inner ring air duct 12 is connected to the smoke exhaust channel 11 and the smoke exhaust channel 11 extends out from the discharge sealing cover 10. The bottom of the inner ring air duct 12 is connected to the ash discharge pipe 14 and the ash discharge pipe 14 extends out from the discharge sealing cover 10. The bottom of the discharge sealing cover 10 has an inner cylinder discharge port 13 and an outer cylinder discharge port 15 located on both sides of the partition device. The inner cylinder discharge port 13 is located on the side of the partition device closer to the outer cylinder 1, and the outer cylinder discharge port 15 is located on the side of the partition device away from the outer cylinder 1.

[0040] The inner cylinder 2 has a ring of inner cylinder lifting plates 4 arranged around its axis of symmetry on its inner wall, and the outer cylinder 1 has a ring of outer cylinder lifting plates 3 arranged around its axis of symmetry on its inner wall. The inner cylinder 2 has an inner cylinder return air port 16 on the side wall near the feed sealing cover 10.

[0041] The operating logic of the integrated waste heat recovery and utilization device of this utility model is as follows:

[0042] The integrated waste heat recovery and utilization device adopts an inner and outer double cylinder design. The material in the inner cylinder can be high-temperature material, while the material in the outer cylinder can be tailings, construction waste, contaminated soil, or other materials with a moisture content of about 20%. The high-temperature material inside transfers heat to the outer cylinder through radiation, heating the material in the outer cylinder and evaporating the moisture. The cold air conveying axial flow fan on the discharge cover sends external cold air into the inner cylinder. The cold air is heated by the high temperature in the inner cylinder and flows from the discharge end to the feed end within the inner cylinder. It then flows into the outer cylinder through the inner cylinder return air port opened on the side wall of the inner cylinder. The air in the outer cylinder flows from the feed end to the discharge end, carrying away the water vapor generated by the drying material. The device has a reasonable internal air duct design, which can realize rapid heat circulation within the device and achieve efficient utilization of heat.

[0043] Verification has shown that the integrated waste heat recovery and utilization device of this utility model has a reasonable structural design and air duct design, which can realize rapid heat circulation within the device and achieve efficient utilization of heat; it can effectively separate the materials in the inner and outer cylinders, and its discharge and feeding are independent, which can distinguish the feeding and discharging of different materials. The design is reasonable, the applicability is good, and it has great application prospects.

[0044] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.

[0045] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. An integrated waste heat recovery and utilization device, characterized in that: Includes inner cylinder, outer cylinder, inlet sealing cover and outlet sealing cover; Both the inner and outer cylinders are cylindrical structures, with the inner cylinder arranged inside the outer cylinder; The feed sealing cover and the discharge sealing cover are respectively arranged at both ends of the outer cylinder; The feed sealing cover is equipped with a feed end inner cylinder sealing device for sealing the feed end of the inner cylinder; The bottom plate of the discharge sealing cover has a through hole and a cold air conveying axial flow fan is installed at the through hole. The discharge sealing cover has an inner ring-shaped air duct, and the side of the inner ring-shaped air duct away from the discharge sealing cover is aligned with the gap between the outer cylinder and the inner cylinder. The top of the inner ring-shaped air duct is connected to the smoke exhaust channel, and the smoke exhaust channel extends out from the discharge sealing cover. The bottom of the inner ring-shaped air duct is connected to the ash discharge pipe, and the ash discharge pipe extends out from the discharge sealing cover. The bottom of the discharge sealing cover has an inner cylinder discharge port and an outer cylinder discharge port located on both sides of the separating device. An inner cylinder return air vent is provided on the side wall near the feed sealing end of the inner cylinder.

2. The integrated waste heat recovery and utilization device according to claim 1, characterized in that, The cold air conveying axial flow fan delivers air from the discharge cover to the feed cover.

3. The integrated waste heat recovery and utilization device according to claim 1, characterized in that, The inner cylinder outlet is located near the outer cylinder side of the separator; The outer cylinder outlet is located on the side of the separator away from the outer cylinder.

4. The integrated waste heat recovery and utilization device according to claim 1, characterized in that, The inner cylinder sealing device at the feed end divides the space enclosed by the feed sealing cover and the outer cylinder into two independent spaces.

5. The integrated waste heat recovery and utilization device according to claim 4, characterized in that, The feed sealing cover has an outer cylinder feed port, and the inner cylinder feed pipe penetrates the feed sealing cover and the inner cylinder sealing device at the feed end to communicate with the inner cylinder.

6. The integrated waste heat recovery and utilization device according to claim 1, characterized in that, The inner annular air duct is coaxial with the discharge sealing cover and does not contact the bottom plate of the discharge sealing cover. A partition device is also provided between the inner annular air duct and the discharge sealing cover to divide the space inside the discharge sealing cover into two independent spaces.

7. The integrated waste heat recovery and utilization device according to claim 1, characterized in that, The inner wall of the inner cylinder is equipped with a ring of inner cylinder lifting plates arranged around its axis of symmetry. The inner wall of the outer cylinder is fitted with a ring of lifting plates arranged around its axis of symmetry.

8. The integrated waste heat recovery and utilization device according to claim 1, characterized in that, The inner and outer cylinders are coaxial, and the outer diameter of the inner cylinder is smaller than the inner diameter of the outer cylinder.

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