Cement kiln waste heat utilization device

Abstract

The utility model relates to the field of waste heat utilization, in particular to a waste heat utilization device for a cement kiln, which comprises a bottom plate and a heat exchange mechanism, and steam power generation equipment is mounted at one end of the bottom plate. After the device works for a long time, if more dust adheres to the surfaces of the heat collecting pieces located in the heat collecting box and affects heat exchange, the rotating rod is rotationally connected with the heat collecting box, a rotating handle at the upper end of the rotating rod is held and rotated by a half circle, and therefore the heat collecting pieces originally located outside the heat collecting box are rotated into the heat collecting box for heat exchange; and then the heat collecting pieces with the surfaces adsorbed with a large amount of dust are cleaned, and therefore continuous operation can be achieved, and loss of high-temperature waste gas can be reduced to the maximum extent.

Description

Technical Field

[0001] The utility model relates to the field of waste heat utilization, in particular to a cement kiln waste heat utilization device. Background Art

[0002] Cement rotary kilns are a type of building materials equipment and a type of lime kiln. Depending on the material they process, they can be categorized as cement rotary kilns, metallurgical and chemical rotary kilns, and lime rotary kilns. Cement rotary kilns are key equipment in both dry and wet cement clinker production lines, and they generate significant amounts of waste heat during operation.

[0003] A search of the patent document with publication number CN220567897U revealed a "cement rotary kiln waste heat power generation device. This device comprises removable heat collecting plates 1 and 2 installed in an exhaust gas waste heat collection box. Heat collecting plates 1 and 2 are brought into contact with a heat collecting tube via a heat collecting plate mounting block. When high-temperature exhaust gas passes through the heat collecting plates 1 and 2, the plates absorb a large amount of heat, which is then transferred to the heat collecting tube, heating the water in the tube to generate steam, which drives a steam turbine generator to generate electricity, meeting power generation requirements. Heat collecting plates 1 and 2 can be removed from the high-temperature exhaust gas collection box via a convenient mounting plate, facilitating cleaning and preventing excessive dust accumulation on the plates, which would affect heat exchange between the plates and the high-temperature exhaust gas, thereby reducing power generation efficiency."

[0004] When too much dust accumulates on the heat collecting plates in the above device and affects heat exchange, the heat collecting plates 1 and 2 can be easily removed so that the heat collecting plates can be removed and cleaned. After the heat collecting plates are removed, the hot air in the high-temperature exhaust gas collection box will easily flow out from the gap in large quantities. In this way, it is necessary to suspend the transportation of the exhaust gas to avoid excessive loss of residual heat in the exhaust gas, which will make it difficult for the device to operate continuously, and the temperature of the water inside the heat collecting tube will also be reduced to a certain extent. Utility Model Content

[0005] The purpose of this utility model is to provide a cement kiln waste heat utilization device in order to solve the above problems.

[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0007] A cement kiln waste heat utilization device comprises a base plate, a steam power generation device is installed at one end of the base plate, and a heat exchange mechanism;

[0008] The heat exchange mechanism includes a raising frame, which is fixed to the upper end of the base plate, a heat collecting box is fixed to the upper end of the raising frame, multiple air inlet pipes are fixed to the lower end of the heat collecting box, an exhaust pipe is fixed to the upper end of the heat collecting box, and multiple square holes are provided at the front and rear ends of the heat collecting box. A water collecting box is fixed inside the heat collecting box, a water inlet pipe is fixed to the bottom of one end of the water collecting box, an air guide pipe is fixed to the other end of the water collecting box, and the air outlet end of the air guide pipe is connected to the steam power generation equipment. A rotating rod is rotatably connected to the middle of each square hole on the heat collecting box, a baffle is fixed to the periphery of the rotating rod, and heat collecting plates are fixed to the front and rear ends of the baffle. A groove is provided on the inner wall at both ends of each square hole on the heat collecting box, and two springs are fixed inside the groove. A top strip is fixed to one end of the spring, and the top strip is slidably connected to the groove. Cleaning structures are installed at the front and rear ends of the heat collecting box.

[0009] Preferably, a turning handle is provided at the upper end of each turning rod.

[0010] Preferably, the baffle and the heat collecting plates at the front and rear ends thereof are combined into a "cross" shape.

[0011] Preferably, the distance between the front and rear ends of the two corresponding heat collecting plates is the same as the distance between the two ends of the baffle.

[0012] Preferably: the cleaning structure includes multiple fixed rods, two fixed rods are fixed at the front and rear ends of the heat collecting box, a sliding frame is slidably connected between the two fixed rods, a sweeping brush is fixed at the lower end of the sliding frame corresponding to the position of each heat collecting plate, and handles are fixed at the two angles of the sliding frame.

[0013] Preferably, the bristles of the sweeping brush are made of polyethylene plastic, and the handle is tilted.

[0014] The beneficial effects compared with the prior art are as follows:

[0015] After a long period of operation, if there is a lot of dust adhering to the surface of the solar collector inside the solar collector box and it affects the heat exchange, the rotating rod is connected to the solar collector box, and the handle at the upper end of the rotating rod is held and rotated half a circle, so that the solar collector originally outside the solar collector box is rotated into the solar collector box for heat exchange, and then the solar collector with a large amount of dust on the surface is cleaned. In this way, not only can the operation be sustained, but the loss of high-temperature exhaust gas can also be minimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 This is a structural diagram of a cement kiln waste heat utilization device described in the utility model;

[0018] Figure 2 This is a structural diagram of a heat exchange mechanism of a cement kiln waste heat utilization device according to the present invention;

[0019] Figure 3 This is a main cross-sectional view of a heat exchange mechanism of a cement kiln waste heat utilization device according to the present invention;

[0020] Figure 4 This is a cement kiln waste heat utilization device described in the utility model Figure 4 A magnified view of point A;

[0021] Figure 5 This is a structural diagram of a water tank of a cement kiln waste heat utilization device according to the present invention;

[0022] Figure 6 This is a structural schematic diagram of a baffle of a cement kiln waste heat utilization device described in the utility model;

[0023] Figure 7 It is a structural schematic diagram of a cleaning structure of a cement kiln waste heat utilization device described in the utility model.

[0024] The following are the descriptions of the reference numerals:

[0025] 1. Bottom plate; 11. Fixing plate; 12. Fixing bolts; 3. Pad height; 31. Collector box; 32. Inlet pipe; 33. Exhaust pipe; 34. Water collecting box; 35. Inlet pipe; 36. Air guide pipe; 37. Rotating rod; 38. Baffle; 39. Collector plate; 310. Spring; 311. Top strip; 312. Groove; 4. Steam power generation equipment; 5. Fixing rod; 51. Sliding frame; 52. Brush; 53. Handle. DETAILED DESCRIPTION

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] like Figure 1-Figure 7 As shown, a cement kiln waste heat utilization device includes a base plate 1, a steam power generation device 4 is installed at one end of the base plate 1, and also includes a heat exchange mechanism.

[0030] The front and rear ends of the base plate 1 are both fixed with fixing plates 11 , and a plurality of fixing bolts 12 are provided in the middle of the fixing plates 11 ; the device can be fixed to a suitable position by the fixing bolts 12 .

[0031] The heat exchange mechanism includes a raised frame 3, which is fixed to the upper end of the base plate 1, and a heat collecting box 31 is fixed to the upper end of the raised frame 3, and a plurality of air inlet pipes 32 are fixed to the lower end of the heat collecting box 31, and an exhaust pipe 33 is fixed to the upper end of the heat collecting box 31. A plurality of square holes are provided at the front and rear ends of the heat collecting box 31, and a water collecting box 34 is fixed inside the heat collecting box 31. A water inlet pipe 35 is fixed to the bottom of one end of the water collecting box 34, and an air guide pipe 36 is fixed to the other end of the water collecting box 34, and the air outlet end of the air guide pipe 36 is connected to the steam power generation equipment 4. A rotating rod 37 is rotatably connected to the middle of each square hole on the heat collecting box 31, and a rotating handle is provided at the upper end of each rotating rod 37. A baffle 38 is fixed to the periphery of the rotating rod 37, and heat collecting sheets 39 are fixed to the front and rear ends of the baffle 38. The baffle 38 and the heat collecting sheets 39 at the front and rear ends are combined to form a "cross" shape, corresponding to the distance between the front and rear ends of the two heat collecting sheets 39 and the baffle The space between the two ends of the plate 38 is the same, and the inner wall of each two ends of the square hole on the heat collecting box 31 is provided with a groove 312, and two springs 310 are fixed inside the groove 312, and a top strip 311 is fixed at one end of the spring 310, and the top strip 311 is slidably connected to the groove 312, and the front and rear ends of the heat collecting box 31 are installed with a cleaning structure; after the device has been operated for a long time, if there is a lot of dust adhering to the surface of the heat collecting sheet 39 inside the heat collecting box 31 and affects the heat exchange, the rotating rod 37 is connected to the rotation of the heat collecting box 31, and the handle at the upper end of the rotating rod 37 is held and rotated half a circle, so that the heat collecting sheet 39 originally outside the heat collecting box 31 is rotated into the heat collecting box 31 for heat exchange, and then the heat collecting sheet 39 with a large amount of dust adsorbed on the surface is cleaned. In this way, not only can continuous operation be achieved, but also the loss of high-temperature exhaust gas can be minimized.

[0032] The cleaning structure includes multiple fixed rods 5, and two fixed rods 5 are fixed at the front and rear ends of the heat collecting box 31. A sliding frame 51 is slidably connected between the two fixed rods 5, and a sweeping brush 52 is fixed at the lower end of the sliding frame 51 corresponding to the position of each heat collecting plate 39. Handles 53 are fixed at the two angles of the sliding frame 51. The bristles of the sweeping brush 52 are made of polyethylene plastic, and the handles 53 are set at an angle. Through the sliding connection between the sliding frame 51 and the fixed rod 5, holding the two handles 53 and pushing them, the sliding frame 51 can drive the multiple sweeping brushes 52 to move, so that the sweeping brushes 52 can sweep the dust on the heat collecting plates 39 that need to be cleaned.

[0033] Working principle: Before the device is operated, first connect the high-temperature exhaust gas input pipe to the air inlet pipe 32, then connect the water injection pipe to the water inlet pipe 35 and inject water into the water collecting box 34. After the preparation is completed, start to transport high-temperature exhaust gas to the inside of the heat collecting box 31. At this time, the heat collecting plate 39 inside the heat collecting box 31 starts to collect heat and heat the water inside the water collecting box 34 to generate steam. The steam can be transported to the steam power generation equipment 4 through the air guide pipe 36 for energy conversion. After a long period of operation, if the surface of the heat collecting plate 39 inside the heat collecting box 31 is adhered to a lot of dust and affects the heat exchange, the heat collector 39 is turned on and turned off by the rotating rod 37. Connected to the rotation of the heat collecting box 31, hold the handle at the upper end of the rotating rod 37 and turn it half a circle, so that the heat collecting sheet 39 originally outside the heat collecting box 31 is rotated into the heat collecting box 31 for heat exchange, and then the heat collecting sheet 39 with a large amount of dust adsorbed on the surface is cleaned. In this way, not only continuous operation can be achieved but also the loss of high-temperature exhaust gas can be minimized. When cleaning the heat collecting sheet 39, hold the two handles 53 and push them. Through the sliding connection between the sliding frame 51 and the fixed rod 5, the sliding frame 51 can drive multiple sweeping brushes 52 to move, so that the sweeping brushes 52 can sweep the dust on the heat collecting sheet 39 that needs to be cleaned.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A cement kiln waste heat utilization device, comprising a base plate (1), one end of which is mounted a steam power generation device (4), characterized in that: Also includes a heat exchange mechanism; The heat exchange mechanism comprises a raised frame (3), the raised frame (3) is fixed to the upper end of the base plate (1), a heat collecting box (31) is fixed to the upper end of the raised frame (3), a plurality of air inlet pipes (32) are fixed to the lower end of the heat collecting box (31), an exhaust pipe (33) is fixed to the upper end of the heat collecting box (31), a plurality of square holes are provided at the front and rear ends of the heat collecting box (31), a water collecting box (34) is fixed inside the heat collecting box (31), a water inlet pipe (35) is fixed to the bottom of one end of the water collecting box (34), an air guide pipe (36) is fixed to the other end of the water collecting box (34), and the air outlet end of the air guide pipe (36) is connected to the The steam power generation equipment (4) is characterized in that a rotating rod (37) is rotatably connected to the middle of each square hole on the heat collecting box (31), a baffle (38) is fixed to the periphery of the rotating rod (37), and heat collecting plates (39) are fixed to the front and rear ends of the baffle (38), and grooves (312) are provided on the inner walls at both ends of each square hole on the heat collecting box (31), two springs (310) are fixed inside the grooves (312), a top strip (311) is fixed to one end of the spring (310), and the top strip (311) is slidably connected to the grooves (312), and cleaning structures are installed at the front and rear ends of the heat collecting box (31).

2. The cement kiln waste heat utilization device according to claim 1, characterized in that: The upper end of each rotating rod (37) is provided with a rotating handle.

3. The cement kiln waste heat utilization device according to claim 1, characterized in that: The baffle (38) and the heat collecting plates (39) at the front and rear ends thereof are combined to form a "cross" shape.

4. The cement kiln waste heat utilization device according to claim 1, characterized in that: The distance between the front and rear ends of the corresponding two heat collecting plates (39) is the same as the distance between the two ends of the baffle (38).

5. The cement kiln waste heat utilization device according to claim 1, characterized in that: The cleaning structure comprises a plurality of fixed rods (5), two of the fixed rods (5) are fixed at the front end and the rear end of the heat collecting box (31), a sliding frame (51) is slidably connected between the two corresponding fixed rods (5), a sweeping brush (52) is fixed at the lower end of the sliding frame (51) corresponding to the position of each heat collecting plate (39), and handles (53) are fixed at the two included angles of the sliding frame (51).

6. The cement kiln waste heat utilization device according to claim 5, characterized in that: The bristles of the sweeping brush (52) are made of polyethylene plastic, and the handle (53) is tilted.

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