Cement rotary kiln temperature difference power generation hot water circulating system

Abstract

The utility model relates to a waste heat energy recycling technical field, especially a kind of cement rotary kiln temperature difference power generation hot water circulation system.The system includes support, radiation collector, temperature difference power generation module, heat exchange water plate, water tank and battery.Radiation collector is installed in the side of support towards cement rotary kiln body, temperature difference power generation module hot end and radiation collector side far from kiln body closely adhere, cold end and heat exchange water plate fixed connection, heat exchange water plate is connected water tank by pipeline, and temperature difference power generation module is electrically connected battery by wire.The system is with the efficient heat absorption of radiation collector and the reinforced heat exchange capacity of heat exchange water plate, and the stable and sufficient temperature difference is quickly formed at the both ends of temperature difference power generation module;module uses bismuth telluride material TEG power generation unit, and temperature difference energy is efficiently converted into electric energy, and it is matched with battery to realize electric energy storage and stable supply, and cold water in heat exchange water plate is heated and then flows into water tank storage after heating, and waste heat resource utilization is realized.

Description

Technical Field

[0001] This utility model relates to the field of waste heat energy recovery and utilization technology, and in particular to a cement rotary kiln temperature difference power generation hot water circulation system. Background Technology

[0002] The cement industry is a major energy consumer and a significant carbon emitter. During cement production, a large amount of energy is released into the environment as waste heat.

[0003] Currently, waste heat utilization technologies in cement rotary kilns mainly include waste heat power generation, waste heat heating, and waste heat cooling. Although some cement companies have adopted technologies such as waste heat power generation to recover some waste heat, the efficiency of waste heat utilization still needs to be improved, and a large amount of medium- and low-temperature waste heat has not been fully utilized. At the same time, common carbon capture technologies such as post-combustion capture, pre-combustion capture, and oxygen-enriched combustion capture have problems such as high capture costs and high energy consumption, which limit their large-scale promotion and application in the cement industry. Utility Model Content

[0004] To address the technical problem of underutilization of waste heat during cement production, this invention provides a cement rotary kiln temperature difference power generation hot water circulation system.

[0005] Therefore, the present invention provides the following technical solution: A cement rotary kiln thermoelectric power generation hot water circulation system includes a support frame, a radiant collector, a thermoelectric power generation module, a hot water exchange plate, a water tank, and a battery. The radiant collector is installed on the side of the support frame facing the cement rotary kiln body. The hot end of the thermoelectric power generation module is tightly fitted to the side of the radiant collector away from the cement rotary kiln body. The cold end of the thermoelectric power generation module is fixedly connected to the hot water exchange plate. The hot water exchange plate is connected to the water tank through a pipe. The thermoelectric power generation module is electrically connected to the battery through a wire.

[0006] Furthermore, the bracket is fixedly installed on the outside of the cement rotary kiln body via a maintenance platform outside the cement rotary kiln body, and the bracket does not contact the cement rotary kiln body.

[0007] Furthermore, the material of the radiant collector is aluminum alloy; the side of the radiant collector facing the cement rotary kiln body is an arc-shaped surface protruding towards the kiln body, and this arc-shaped surface is a rough surface treated with black oxidation; the side of the radiant collector away from the cement rotary kiln body is a smooth plane, and the smooth plane is tightly fitted and fixed to the hot end of the thermoelectric power generation module.

[0008] Furthermore, the thermoelectric power generation module includes TEG thermoelectric power generation units made of bismuth telluride material, and there is an electrical connection between each TEG thermoelectric power generation unit. The hot end of the TEG thermoelectric power generation unit is in contact with the smooth surface of the radiant collector, and the cold end of the TEG thermoelectric power generation unit is fixedly connected to the outer wall of the heat exchange plate. The power output end of the thermoelectric power generation module is electrically connected to the battery through a wire.

[0009] Furthermore, the hot water exchange plate is made of aluminum alloy, and fine channels are arranged in parallel inside the hot water exchange plate. The water inlet of the hot water exchange plate is connected to cold water through a pipe, and the water outlet of the hot water exchange plate is connected to the water inlet of the water tank through a pipe. The water tank is used to store the hot water heated by the hot water exchange plate.

[0010] Furthermore, the support is a regular polygonal metal frame structure, with each support connected sequentially along the circumferential direction of the cement rotary kiln body, and the included angle between adjacent supports is equal. The distance between each support and the surface of the cement rotary kiln is set to 5-20mm.

[0011] Furthermore, the bracket is a regular quadrilateral frame structure, and adjacent frames are rotatably connected by hinges.

[0012] Advantages and positive effects of this utility model: This system utilizes the efficient heat absorption of radiant collectors and the enhanced heat exchange capacity of the heat exchanger plate to quickly create a stable and sufficient temperature difference across the thermoelectric power generation module. The thermoelectric power generation module employs a bismuth telluride TEG power generation unit, which efficiently converts thermoelectric energy into electrical energy. Combined with a battery, this energy is stored to ensure a stable power supply. Inside the heat exchanger plate, cold water absorbs heat and rapidly heats up before flowing into a water tank for storage.

[0013] The system's efficient power generation and energy storage provide additional power to the cement production site, reducing reliance on the external power grid. The hot water circulation system enables the utilization of waste heat, and the hot water produced can meet the needs of production support or employee living. At the same time, the cooling effect of the hot water exchange plate on the power generation module extends the service life of the equipment. Ultimately, while saving energy and reducing costs, the system achieves a dual improvement in environmental protection and efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of a cement rotary kiln thermoelectric power generation hot water circulation system provided by this utility model.

[0016] Figure 2 A schematic diagram of the support structure for a cement rotary kiln thermoelectric power generation hot water circulation system provided by this utility model.

[0017] Figure 3 A schematic diagram of the hot water exchange plate structure of a cement rotary kiln thermoelectric power generation hot water circulation system provided by this utility model.

[0018] In the diagram: 1. Cement rotary kiln body; 2. Support frame; 3. Radiant collector; 4. Thermoelectric power generation module; 5. Hot water exchange plate; 6. Water tank; 7. Battery. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0020] This utility model provides a cement rotary kiln temperature difference power generation hot water circulation system, such as... Figure 1 As shown, it includes a support frame 2, a radiant collector 3, a thermoelectric power generation module 4, a hot water exchange plate 5, a water tank 6, and a battery 7; Figure 2 As shown, the support 2 is a regular quadrilateral metal frame structure, with adjacent frames connected by hinges. Each support 2 is sequentially connected along the circumference of the cement rotary kiln body 1. The distance between each support 2 and the surface of the cement rotary kiln is set to 5-20mm. Within this range, the hot end can absorb radiant heat of 200℃-250℃ from the kiln surface. Temperatures below this range will affect the operation of the kiln itself, while temperatures above this range will significantly reduce heat utilization efficiency. The support 2 is fixedly installed on the outside of the cement rotary kiln body 1 via an external maintenance platform, and the support 2 does not contact the cement rotary kiln body 1. Since the temperature varies at different locations on the surface of the cement rotary kiln body 1, rotating the corresponding frames in the support 2 ensures that the temperature at each frame's location is uniform. This ensures that the radiant collector 3 is precisely aligned with the surface of the cement rotary kiln body 1.

[0021] like Figure 1As shown, the material of the radiant collector 3 is aluminum alloy. The radiant collector 3 is installed on the side of the bracket 2 facing the cement rotary kiln body 1. The side of the radiant collector 3 facing the cement rotary kiln body 1 is an arc-shaped surface protruding towards the kiln body. This arc-shaped surface is a rough surface treated with black oxide. The black oxide layer enhances the heat radiation absorption capacity, and the rough surface increases the heat absorption area. The arc-shaped structure, combined with the curved surface of the cement rotary kiln body 1, maximizes the capture of the waste heat emitted from the surface of the rotary kiln.

[0022] The side of the radiant collector 3 furthest from the cement rotary kiln body 1 is a smooth plane. The hot end of the thermoelectric power generation module 4 is tightly fitted and fixed to this smooth plane of the radiant collector 3, forming a high-temperature end by heat conduction to obtain the waste heat absorbed by the collector. The cold end of the thermoelectric power generation module 4 is fixedly connected to the hot water exchange plate 5. The cold water flowing inside the hot water exchange plate continuously carries away heat, forming a low-temperature end, ultimately creating a stable temperature difference between the two ends of the module. The hot water exchange plate 5 is connected to the water tank 6 through a pipe, and the thermoelectric power generation module 4 is electrically connected to the battery 7 through a wire.

[0023] Thermoelectric module 4 contains TEG thermoelectric generator units made of bismuth telluride. Each TEG thermoelectric generator unit is electrically connected to the others, forming a complete circuit through the electrical connections of the units. Utilizing the Seebeck effect, thermoelectric energy is converted into electrical energy. The hot end of the TEG thermoelectric generator unit is in contact with the smooth surface of the radiant collector 3, and the cold end of the TEG thermoelectric generator unit is fixedly connected to the outer wall of the hot water exchange plate 5. The power output end of thermoelectric module 4 is electrically connected to battery 7 through wires, transmitting the generated electrical energy to battery 7 via the wires, thus realizing the storage and subsequent use of electrical energy.

[0024] like Figure 3 As shown, the hot water exchange plate 5 is made of aluminum alloy. The hot water exchange plate has micro channels connected in parallel inside, which greatly increases the contact area between cold water and the plate wall and improves the heat exchange efficiency. The water inlet of the hot water exchange plate 5 is connected to cold water through a pipe, and the water outlet of the hot water exchange plate 5 is connected to the water inlet of the water tank 6 through a pipe. The water tank 6 is used to store the hot water heated by the hot water exchange plate 5.

[0025] Working principle: When the cement rotary kiln body 1 is working, its surface continuously emits waste heat. The system first captures this waste heat through the radiant collector 3 fixed by the bracket 2. The radiant collector 3 faces the black oxidized rough arc surface of the kiln body to obtain the heat emitted from the kiln body surface, while the smooth plane away from the kiln body transfers the absorbed heat to the hot end of the thermoelectric power generation module 4. At this time, cold water flows inside the hot water exchange plate 5. The cold water exchanges heat with the cold end of the module 4 through the parallel micro channels inside the plate, continuously removing the heat from the cold end and creating a stable temperature difference between the two ends of the module 4. The bismuth telluride TEG power generation unit in the module 4 uses this temperature difference to convert the thermoelectric energy into electrical energy through the Seebeck effect. The generated electrical energy is transmitted to the battery 7 for storage through the wires. At the same time, the cold water in the hot water exchange plate 5 absorbs the heat from the cold end of the module 4 and its temperature rises, becoming hot water. This hot water is then transported to the water tank 6 for storage through pipes for subsequent use. The whole process simultaneously completes waste heat recovery, power generation and hot water preparation.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cement rotary kiln temperature difference power generation hot water circulation system, characterized in that, The system includes a bracket (2), a radiant collector (3), a thermoelectric generator (4), a hot water exchange plate (5), a water tank (6), and a battery (7). The radiant collector (3) is installed on the side of the bracket (2) facing the cement rotary kiln body (1). The hot end of the thermoelectric generator (4) is tightly attached to the side of the radiant collector (3) away from the cement rotary kiln body (1). The cold end of the thermoelectric generator (4) is fixedly connected to the hot water exchange plate (5). The hot water exchange plate (5) is connected to the water tank (6) through a pipe. The thermoelectric generator (4) is electrically connected to the battery (7) through a wire.

2. The cement rotary kiln temperature difference power generation hot water circulation system according to claim 1, characterized in that, The bracket (2) is fixedly installed on the outside of the cement rotary kiln body (1) via the maintenance platform outside the cement rotary kiln body (1), and the bracket (2) does not contact the cement rotary kiln body (1).

3. The cement rotary kiln temperature difference power generation hot water circulation system according to claim 1, characterized in that, The material of the radiant collector (3) is aluminum alloy; the side of the radiant collector (3) facing the cement rotary kiln body (1) is an arc-shaped surface protruding towards the kiln body, and the arc-shaped surface is a rough surface treated with black oxidation; the side of the radiant collector (3) away from the cement rotary kiln body (1) is a smooth plane, and the smooth plane is tightly attached and fixed to the hot end of the thermoelectric power generation module (4).

4. The cement rotary kiln temperature difference power generation hot water circulation system according to claim 3, characterized in that, The thermoelectric power generation module (4) contains a TEG thermoelectric power generation unit made of bismuth telluride material. There is an electrical connection between each TEG thermoelectric power generation unit. The hot end of the TEG thermoelectric power generation unit is in contact with the smooth surface of the radiant collector (3). The cold end of the TEG thermoelectric power generation unit is fixedly connected to the outer wall of the hot water exchange plate (5). The power output end of the thermoelectric power generation module (4) is electrically connected to the battery (7) through a wire.

5. A cement rotary kiln temperature difference power generation hot water circulation system according to claim 1, characterized in that, The hot water exchange plate (5) is made of aluminum alloy. The hot water exchange plate has micro channels connected in parallel inside. The water inlet of the hot water exchange plate (5) is connected to cold water through a pipe, and the water outlet of the hot water exchange plate (5) is connected to the water inlet of the water tank (6) through a pipe. The water tank (6) is used to store the hot water heated by the hot water exchange plate (5).

6. A cement rotary kiln temperature difference power generation hot water circulation system according to claim 1, characterized in that, The support (2) is a regular polygonal metal frame structure. Each support (2) is connected in sequence along the circumferential direction of the cement rotary kiln body (1). The distance between each support (2) and the surface of the cement rotary kiln is set to 5-20mm.

7. A cement rotary kiln temperature difference power generation hot water circulation system according to claim 6, characterized in that, The bracket (2) is a regular quadrilateral frame structure, and the two adjacent frames are connected by hinges.

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