Rotary kiln waste heat recovery device
By designing a waste heat recovery device in the rotary kiln, the heat of the rotary kiln body is transferred to water and combustion air through a heat-conducting structure, which solves the problems of heat loss and temperature difference, realizes multiple ways of waste heat recovery, reduces coal consumption and improves utilization rate.
Patent Information
- Application Number
- CN202520100906.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-01-16
AI Technical Summary
In rotary kilns, heat loss is severe and the temperature difference between the combustion air and the inside of the rotary kiln is large, leading to an increase in coal consumption. Existing waste heat recovery methods are simple and inefficient.
A waste heat recovery device for a rotary kiln is designed, comprising a waste heat recovery box, a water chamber, and an air chamber. The heat of the rotary kiln body is transferred to the water and heated to the combustion air through a heat-conducting structure, realizing multiple waste heat recovery methods and reducing the temperature difference between the combustion air and the inside of the rotary kiln body.
Reduce coal consumption, improve waste heat utilization, expand the applicable scope of the equipment, and realize multiple waste heat recovery methods.
Smart Images
Figure CN223663766U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a waste heat recovery technical field, concretely is a rotary kiln waste heat recovery device. BACKGROUND
[0002] In many production industries such as building, metallurgy, chemical industry, environmental protection, rotary kiln is widely used to carry out mechanical, physical and chemical treatment to solid materials. When the rotary kiln processes the materials, the materials need to be heated, because a large amount of heat is needed in the process of treating the materials, and in this process, a large amount of heat will be lost to the outside along the rotary kiln wall, the heat cannot be well utilized, and the energy loss is serious. The existing heat recovery mode is mostly to recover the heat by heating water, the recovery mode is single, and the rotary kiln usually needs to be supplied with combustion-supporting air when in use, the combustion-supporting air supplied has a large temperature difference with the temperature inside the rotary kiln, resulting in an increase in the amount of coal.
[0003] Therefore, the utility model provides a rotary kiln waste heat recovery device. UTILITY MODEL CONTENTS
[0004] In view of the deficiencies in the prior art, the utility model aims to provide a rotary kiln waste heat recovery device to solve the problems in the background art, which can heat the combustion-supporting air before being supplied into the rotary kiln body, so as to reduce the temperature difference between the combustion-supporting air and the temperature inside the rotary kiln body, reduce the amount of coal, and heat water to recover the waste heat, multiple waste heat recovery modes, improve the waste heat utilization rate, and expand the application range of the device.
[0005] In order to achieve the above-mentioned purpose, the utility model is realized by the following technical scheme: a rotary kiln waste heat recovery device, comprising a waste heat recovery tank arranged on the side of the rotary kiln body, a water cavity and an air cavity are formed in the waste heat recovery tank, the air cavity is located between the water cavity and the rotary kiln body, a heat conduction structure is arranged in the water cavity, the heat conduction structure is in contact with the surface of the rotary kiln body, an air inlet structure is arranged on the waste heat recovery tank, the air inlet structure is communicated with the air cavity, an air outlet structure is arranged on one side of the waste heat recovery tank, an air inlet opening for combustion-supporting air is formed on the rotary kiln body, and the air inlet opening for combustion-supporting air corresponds to the air outlet structure.
[0006] Further, the waste heat recovery tank is fixed with a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe are both communicated with the water cavity, and the water inlet pipe and the water outlet pipe are both provided with valves.
[0007] Further, the heat conduction structure comprises a first heat conduction plate and a second heat conduction plate, the first heat conduction plate is in the form of a ring, and the first heat conduction plate is located in the water cavity.
[0008] Further, a plurality of first heat-conducting rods are fixed between the first heat-conducting plate and the second heat-conducting plate, and the second heat-conducting plate is in contact with the surface of the rotary kiln body.
[0009] Further, a plurality of second heat-conducting rods are fixed on the circumferential side of the first heat-conducting plate.
[0010] Further, a plurality of temperature sensors are fixed in the water cavity.
[0011] Further, the air inlet structure comprises an air extractor, and an air inlet pipe is fixed to the air outlet end of the air extractor and communicates with the air cavity.
[0012] Further, the air outlet structure comprises an air outlet pipe, and the two ends of the air outlet pipe respectively communicate with the combustion-supporting air inlet and the air cavity.
[0013] The rotary kiln waste heat recovery device has the advantages that the water cavity and the air cavity are arranged in the waste heat recovery box, the air inlet structure and the air outlet structure are arranged on the waste heat recovery box, the combustion-supporting air can be heated before being introduced into the rotary kiln body, the temperature difference between the combustion-supporting air and the rotary kiln body is reduced, the amount of coal is reduced, the waste heat can be recovered by heating water, the waste heat recovery rate is improved, and the application range of the device is expanded.
[0014] The rotary kiln waste heat recovery device has the advantages that the water cavity and the air cavity are arranged in the waste heat recovery box, the air inlet structure and the air outlet structure are arranged on the waste heat recovery box, the combustion-supporting air can be heated before being introduced into the rotary kiln body, the temperature difference between the combustion-supporting air and the rotary kiln body is reduced, the amount of coal is reduced, the waste heat can be recovered by heating water, the waste heat recovery rate is improved, and the application range of the device is expanded. BRIEF DESCRIPTION OF DRAWINGS
[0015] Fig. 1 It is a whole assembly perspective structure schematic view of the rotary kiln waste heat recovery device.
[0016] Fig. 2 It is a whole assembly cross-sectional structure schematic view of the rotary kiln waste heat recovery device.
[0017] Fig. 3 It is an assembly structure schematic view of the rotary kiln body and the waste heat recovery box in the rotary kiln waste heat recovery device.
[0018] In the drawing: 1, rotary kiln body; 2, waste heat recovery box; 3, water cavity; 4, air extractor; 5, air inlet pipe; 6, air outlet pipe; 7, water inlet pipe; 8, water outlet pipe; 9, first heat-conducting plate; 10, second heat-conducting plate; 11, first heat-conducting rod; 12, second heat-conducting rod; 13, air cavity; 14, temperature sensor. DETAILED DESCRIPTION
[0019] In order to make the technical means, creative features, purposes and effects achieved by the rotary kiln waste heat recovery device easy to understand, the rotary kiln waste heat recovery device will be further described in combination with the specific embodiments.
[0020] Please refer toFigs. 1 to 3 The utility model provides a kind of rotary kiln waste heat recovery device, including the waste heat recovery tank 2 being equipped in the rotary kiln body 1 week side, water cavity 3 and air cavity 13 are opened in the waste heat recovery tank 2, air cavity 13 is located between water cavity 3 and rotary kiln body 1, water cavity 3 is equipped with heat conduction structure, heat conduction structure and the surface of rotary kiln body 1 are contacted, waste heat recovery tank 2 is equipped with air inlet structure, air inlet structure is connected with air cavity 13, waste heat recovery tank 2 one side is equipped with air outlet structure, rotary kiln body 1 is equipped with combustion-supporting air inlet, combustion-supporting air inlet corresponds with air outlet structure.
[0021] In the embodiment, the water inlet pipe 7 and the water outlet pipe 8 are fixed on the waste heat recovery tank 2, the water inlet pipe 7 and the water outlet pipe 8 are connected with the water cavity 3, the water inlet pipe 7 and the water outlet pipe 8 are equipped with valves, the heat conduction structure includes the first heat conduction plate 9 and the second heat conduction plate 10, the first heat conduction plate 9 is annular, the first heat conduction plate 9 is located in the water cavity 3, a plurality of first heat conduction rods 11 are fixed between the first heat conduction plate 9 and the second heat conduction plate 10, the second heat conduction plate 10 is contacted with the surface of the rotary kiln body 1, a plurality of second heat conduction rods 12 are fixed on the periphery of the first heat conduction plate 9, and a plurality of temperature sensors 14 are fixed in the water cavity 3.
[0022] Specifically, the water cavity 3 is filled with water through the water inlet pipe 7, then the heat on the surface of the rotary kiln body 1 is transferred to the water cavity 3 through the second heat conduction plate 10, and then the heat is transferred to the water cavity 3 through the first heat conduction rod 11 and the first heat conduction plate 9, and then the heat is transferred to the water cavity 3 through the second heat conduction rod 12, so as to ensure that the water is heated uniformly, and the temperature of the water cavity 3 can be detected by the temperature sensor 14, when the temperature reaches the required temperature, the water can be discharged through the water outlet pipe 8, and then cold water is introduced after complete discharge, so as to realize the recovery of waste heat.
[0023] The air inlet structure includes the air extractor 4, the air outlet pipe 5 is fixed on the air outlet pipe 6, the air outlet pipe 5 is connected with the air cavity 13, and the air outlet structure includes the air outlet pipe 6.
[0024] Specifically, the air extractor 4 is started, so that the air extractor 4 blows the external air into the air cavity 13 through the air inlet pipe 5, then the air is heated by the waste heat in the air cavity 13, and then the air is blown out from the air outlet pipe 6 into the combustion-supporting air inlet, so as to heat the combustion-supporting air, thereby achieving good combustion-supporting effect.
[0025] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that can be understood by those skilled in the art.
Claims
1. A rotary kiln waste heat recovery device, comprising a waste heat recovery box (2) installed around the periphery of the rotary kiln body (1), characterized in that, The waste heat recovery box (2) is provided with a water cavity (3) and an air cavity (13). The air cavity (13) is located between the water cavity (3) and the rotary kiln body (1). The water cavity (3) is provided with a heat-conducting structure, which is in contact with the surface of the rotary kiln body (1). The waste heat recovery box (2) is provided with an air inlet structure, which is connected to the air cavity (13). The waste heat recovery box (2) is provided with an air outlet structure on one side. The rotary kiln body (1) is provided with a combustion air inlet, which corresponds to the air outlet structure.
2. The rotary kiln waste heat recovery device according to claim 1, characterized in that: The waste heat recovery box (2) is fixed with an inlet pipe (7) and an outlet pipe (8). Both the inlet pipe (7) and the outlet pipe (8) are connected to the water chamber (3). Both the inlet pipe (7) and the outlet pipe (8) are equipped with valves.
3. The rotary kiln waste heat recovery device according to claim 1, characterized in that: The heat-conducting structure includes a first heat-conducting plate (9) and a second heat-conducting plate (10). The first heat-conducting plate (9) is a ring structure and is located inside the water cavity (3).
4. The rotary kiln waste heat recovery device according to claim 3, characterized in that: Multiple first heat-conducting rods (11) are fixed between the first heat-conducting plate (9) and the second heat-conducting plate (10), and the second heat-conducting plate (10) is in contact with the surface of the rotary kiln body (1).
5. A rotary kiln waste heat recovery device according to claim 3, characterized in that: Multiple second heat-conducting rods (12) are fixed around the first heat-conducting plate (9).
6. The rotary kiln waste heat recovery device according to claim 1, characterized in that: Multiple temperature sensors (14) are fixed inside the water cavity (3).
7. The rotary kiln waste heat recovery device according to claim 1, characterized in that: The air intake structure includes a blower (4), and the outlet end of the blower (4) is fixed with an air intake pipe (5), which is connected to the air chamber (13).
8. A rotary kiln waste heat recovery device according to claim 1, characterized in that: The air outlet structure includes an air outlet pipe (6), the two ends of which are connected to the combustion air inlet and the air cavity (13), respectively.