Waste heat recycling device for rotary kiln body

Abstract

The utility model relates to the field of household daily necessities, in particular to a waste heat recycling device for a rotary kiln body. The rotary kiln body waste heat recycling device comprises a rotary kiln body, a water tank and a filter plate, the rotary kiln body is sleeved with a recycling cover, the top end of the recycling cover is communicated with a frame, a secondary heat exchange pipe is wound around the outer wall of the rotary kiln body, multiple layers of primary heat exchange pipes are installed in the frame, and the water tank is installed on one side of the rotary kiln body. A water outlet of the water tank communicates with the primary heat exchange pipe, one end of the primary heat exchange pipe communicates with one end of the secondary heat exchange pipe, filter plates are installed at the bottom end in the recovery cover at equal intervals, and fan blades are installed at the bottom end in the recovery cover at equal intervals. Through the design of the secondary heat exchange pipe tightly attached to the rotary kiln body and the application of a multi-stage heat exchange structure, the device can catch and recover waste heat generated by the rotary kiln to the maximum extent, and the heat recovery efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the field of rotary kilns, in particular to a rotary kiln body waste heat recovery and utilization device. Background Art

[0002] In industrial production, rotary kiln is an important thermal equipment, widely used in cement, metallurgy, chemical industry and other fields. Rotary kiln generates a lot of waste heat during operation. If this waste heat is not recycled, it will not only cause energy waste, but also may have adverse effects on the environment. Therefore, how to efficiently and environmentally friendly recycle the waste heat of rotary kiln has become an urgent problem to be solved in current industrial production.

[0003] Most traditional methods of recovering waste heat from rotary kilns are inefficient. For example, some systems that use heat exchangers for waste heat recovery have low heat transfer efficiency due to the poor fit between the heat exchanger and the rotary kiln body.

[0004] Therefore, it is necessary to provide a new rotary kiln waste heat recovery device to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a rotary kiln waste heat recovery and utilization device.

[0006] The utility model provides a rotary kiln waste heat recovery and utilization device comprising: a rotary kiln body, a water tank and a filter plate; a recovery cover is sleeved on the outside of the rotary kiln body, a frame is connected to the top of the recovery cover, a secondary heat exchange pipe is wound around the outer wall of the rotary kiln body, a multi-layer primary heat exchange pipe is installed inside the frame, a water tank is installed on one side of the rotary kiln body, a water outlet of the water tank is connected to the primary heat exchange pipe, one end of the primary heat exchange pipe is connected to one end of the secondary heat exchange pipe, filter plates are equidistantly installed at the bottom end of the recovery cover, and fan blades are equidistantly installed at the bottom end of the recovery cover.

[0007] Preferably, the inner wall of the frame is staggered and fixedly connected with guide plates, the two guide plates and the inside of the frame form a curved flow channel, and each flow channel is installed with a primary heat exchange tube. The heat dissipation air is drawn into the recovery cover through the fan blades, and the air takes away the heat from the outer wall of the rotary kiln body and enters the frame, and preheats the water in the primary heat exchange tube.

[0008] Preferably, the bottom of the frame is equidistantly provided with pull-out grooves, the filter plate is slidably connected to the inner wall of the pull-out groove, a threaded hole is provided on one side of the frame located at the pull-out groove, one side of the filter plate is rotatably connected with a bolt, and the bolt is threadedly connected to the threaded hole.

[0009] Preferably, the cross-section of the secondary heat exchange tube is designed to be rectangular, and the rectangle can better fit the outer wall of the rotary kiln body.

[0010] Preferably, an air outlet channel is fixedly connected to the top of the frame, the air outlet channel is U-shaped, and the outlet of the air outlet channel faces downward.

[0011] Preferably, one side of the water tank is fixedly connected to one side of the recovery cover, and the side of the water tank close to the recovery cover is made of iron material to absorb the heat inside the recovery cover.

[0012] Preferably, the recovery cover, the frame and the outer side of the water tank are all wrapped with thermal insulation cotton.

[0013] Compared with the related art, the rotary kiln waste heat recovery device provided by the utility model has the following beneficial effects:

[0014] Efficient heat recovery:

[0015] Through the design of secondary heat exchange tubes that fit closely to the rotary kiln body and the use of multi-stage heat exchange structure, this device can capture and recover the waste heat generated by the rotary kiln to the maximum extent, significantly improving the heat recovery efficiency;

[0016] The synergistic effect of the primary heat exchange tube and the secondary heat exchange tube enables the heat to be fully utilized during the transfer process, reducing heat loss and improving the thermal efficiency of the overall system;

[0017] Direct heat utilization:

[0018] The water (or heat exchange medium) heated by the secondary heat exchange tube is directly supplied to the system or equipment that needs heat, such as the heating system, hot water supply system, etc., which realizes the immediate use of heat, avoids the ineffective circulation of heat in the return water tank, and improves the energy utilization efficiency;

[0019] Energy saving and environmental protection:

[0020] This device reduces dependence on traditional energy sources by efficiently recovering waste heat, reduces energy consumption and carbon emissions, and is in line with the current green and low-carbon environmental protection concept;

[0021] At the same time, the thermal insulation design of the recovery cover, frame and outside of the water tank effectively reduces heat loss and further improves the energy-saving effect of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of the rotary kiln waste heat recovery device provided by the utility model;

[0023] Figure 2 for Figure 1 The structural schematic diagram of the recovery cover shown;

[0024] Figure 3 for Figure 1 A schematic diagram of the structure of the guide plate inside the frame shown;

[0025] Figure 4 for Figure 1 The structural schematic diagram of the partial enlarged view of the threaded hole shown.

[0026] Numbers in the figure: 1. Rotary kiln body; 2. Recovery cover; 3. Frame; 4. Secondary heat exchange tube; 5. Primary heat exchange tube; 6. Water tank; 7. Filter plate; 8. Fan blade; 9. Guide plate; 10. Pull-out groove; 11. Threaded hole; 12. Bolt; 13. Air outlet channel. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0028] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0029] See also Figure 1-4 A rotary kiln waste heat recovery and utilization device, the rotary kiln waste heat recovery and utilization device comprises: a rotary kiln body 1, a water tank 6 and a filter plate 7, a recovery cover 2 is provided on the outside of the rotary kiln body 1, a frame 3 is connected to the top of the recovery cover 2, a secondary heat exchange pipe 4 is wound around the outer wall of the rotary kiln body 1, a multi-layer primary heat exchange pipe 5 is installed inside the frame 3, a water tank 6 is installed on one side of the rotary kiln body 1, a water outlet of the water tank 6 is connected to the primary heat exchange pipe 5, one end of the primary heat exchange pipe 5 is connected to one end of the secondary heat exchange pipe 4, and the inside of the recovery cover 2 is connected to the secondary heat exchange pipe 4. Filter plates 7 are installed equidistantly at the bottom end, fan blades 8 are installed equidistantly at the bottom end of the recovery hood 2, the cross-section of the secondary heat exchange tube 4 is designed to be rectangular, and the rectangle can better fit the outer wall of the rotary kiln body 1, and the top of the frame 3 is fixedly connected to an air outlet channel 13, the air outlet channel 13 is U-shaped, and the outlet of the air outlet channel 13 faces downward, one side of the water tank 6 is fixedly connected to one side of the recovery hood 2, and the side of the water tank 6 close to the recovery hood 2 is made of iron, which is used to absorb the heat inside the recovery hood 2, and the outside of the recovery hood 2, the frame 3 and the water tank 6 are all wrapped with thermal insulation cotton.

[0030] See also Figure 2-3 The inner wall of the frame 3 is staggered and fixedly connected with guide plates 9, and the two guide plates 9 form a curved flow channel with the inside of the frame 3, and a primary heat exchange tube 5 is installed inside each flow channel. The heat dissipation air is drawn into the recovery cover 2 through the fan blades 8, and the air takes away the heat from the outer wall of the rotary kiln body 1 and enters the frame 3, and preheats the water in the primary heat exchange tube 5.

[0031] See also Figure 4The bottom of the frame 3 is equidistantly provided with drawing grooves 10, the filter plate 7 is slidably connected to the inner wall of the drawing groove 10, a threaded hole 11 is provided on one side of the frame 3 located at the drawing groove 10, a bolt 12 is rotatably connected to one side of the filter plate 7, and the bolt 12 is threadedly connected to the threaded hole 11.

[0032] The working principle of the rotary kiln waste heat recovery device provided by the utility model is as follows:

[0033] The working principle of the rotary kiln waste heat recovery device is mainly based on the heat exchange principle. It realizes the efficient recovery and utilization of the waste heat generated by the rotary kiln body through a multi-stage heat exchange structure. The following is the specific operation of the device.

[0034] Working principle:

[0035] Heat collection and initial heat exchange:

[0036] The rotary kiln body 1 generates a large amount of waste heat during operation, and this heat is radiated outward through the outer wall of the rotary kiln body;

[0037] The recovery cover 2 is tightly mounted on the outside of the rotary kiln body 1 to effectively collect and concentrate the radiated heat;

[0038] The fan blade 8 installed at the bottom end of the recovery cover 2 carries the heat to the top of the recovery cover 2 through the air flow, and performs preliminary heat exchange with the primary heat exchange tube 5 inside the frame 3; in this process, the air acts as a heat carrier to transfer the heat to the water in the primary heat exchange tube 5, thereby realizing preliminary heat recovery;

[0039] Multi-stage heat exchange and heat boost:

[0040] After absorbing heat, the water in the primary heat exchange tube 5 increases in temperature and flows to the input end of the secondary heat exchange tube 4 that has a heat exchange relationship with the primary heat exchange tube 5;

[0041] The secondary heat exchange tube 4 is tightly wound around the outer wall of the rotary kiln body 1. Since the cross section of the secondary heat exchange tube 4 is designed to be rectangular, it can better fit the outer wall of the rotary kiln body 1, thereby further improving the heat transfer efficiency;

[0042] In the secondary heat exchange tube 4, the water exchanges heat with the outer wall of the rotary kiln body 1 again, and the temperature is further increased, thus achieving deep heat recovery;

[0043] Importantly, the water heated by the secondary heat exchange tube 4 does not flow back into the water tank 6, but is directly used for subsequent utilization, such as for heating, hot water supply or other industrial purposes;

[0044] Heat utilization:

[0045] The water heated by the secondary heat exchange tube 4 is directly supplied to the system or equipment requiring heat, such as a heating system, a hot water supply system, etc.;

[0046] The water tank 6 is mainly used as a water supply source for the primary heat exchange tube 5, providing a cold source for the initial heat exchange; one side of the water tank 6 is fixedly connected to one side of the recovery cover 2, and is made of iron material, which can absorb the extra heat inside the recovery cover 2, but this part of the heat is mainly used to preheat the water entering the primary heat exchange tube 5, rather than directly used in the heating process of the secondary heat exchange tube 4;

[0047] Heat dissipation and dust filtration:

[0048] The guide plate 9 installed inside the frame 3 forms a curved flow channel, which helps to evenly distribute the heat dissipating air and transfer heat;

[0049] The filter plate 7 installed at the bottom of the recovery cover 2 can filter out dust and impurities in the air to prevent them from entering the heat exchange tube and affecting the heat exchange effect; the filter plate 7 is connected to the threaded hole 11 of the frame 3 by bolts 12, which is easy to disassemble and clean;

[0050] The air outlet channel 13 at the top of the frame 3 is U-shaped, with the outlet facing downward, which helps to discharge the heat-dissipated air out of the device and prevents external factors such as rain from entering the device;

[0051] Insulation and energy saving:

[0052] The outsides of the recovery cover 2, the frame 3 and the water tank 6 are all wrapped with thermal insulation cotton, which effectively reduces heat loss and improves heat recovery efficiency.

[0053] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A rotary kiln waste heat recovery device, characterized in that: include: A rotary kiln body (1), wherein a recovery cover (2) is provided on the outside of the rotary kiln body (1), a frame (3) is connected to the top of the recovery cover (2), a secondary heat exchange tube (4) is wound around the outer wall of the rotary kiln body (1), and a plurality of layers of primary heat exchange tubes (5) are installed inside the frame (3); A water tank (6), a water tank (6) is installed on one side of the rotary kiln body (1), a water outlet of the water tank (6) is connected to the primary heat exchange tube (5), and one end of the primary heat exchange tube (5) is connected to one end of the secondary heat exchange tube (4); The filter plate (7) is equidistantly installed at the bottom of the recovery cover (2), and the fan blades (8) are equidistantly installed at the bottom of the recovery cover (2).

2. The rotary kiln waste heat recovery device according to claim 1, characterized in that: The inner wall of the frame (3) is staggered and fixedly connected with guide plates (9), and the two guide plates (9) and the inside of the frame (3) form a curved flow channel, and each flow channel is installed with a primary heat exchange tube (5). The heat dissipation air is drawn into the inside of the recovery cover (2) through the fan blades (8), and the air takes away the heat of the outer wall of the rotary kiln body (1) and enters the inside of the frame (3), and preheats the water in the primary heat exchange tube (5).

3. The rotary kiln waste heat recovery device according to claim 1, characterized in that: The bottom end of the frame (3) is provided with draw-out grooves (10) at equal intervals, the filter plate (7) is slidably connected to the inner wall of the draw-out groove (10), a threaded hole (11) is provided on one side of the frame (3) located at the draw-out groove (10), a bolt (12) is rotatably connected to one side of the filter plate (7), and the bolt (12) is threadedly connected to the threaded hole (11).

4. The rotary kiln waste heat recovery device according to claim 1, characterized in that: The cross section of the secondary heat exchange tube (4) is designed to be rectangular, and the rectangle can better fit the outer wall of the rotary kiln body (1).

5. The rotary kiln waste heat recovery device according to claim 1, characterized in that: An air outlet channel (13) is fixedly connected to the top of the frame (3); the air outlet channel (13) is U-shaped, and the outlet of the air outlet channel (13) faces downward.

6. The rotary kiln waste heat recovery device according to claim 1, characterized in that: One side of the water tank (6) is fixedly connected to one side of the recovery cover (2), and the side of the water tank (6) close to the recovery cover (2) is made of iron material and is used to absorb heat inside the recovery cover (2).

7. The rotary kiln waste heat recovery and utilization device according to claim 1, characterized in that: The outsides of the recovery cover (2), the frame (3) and the water tank (6) are all wrapped with heat-insulating cotton.

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