Rotary kiln waste heat recovery device

Abstract

A rotary kiln waste heat recovery device effectively solves the problem that waste heat recovery of an existing rotary kiln is inconvenient. Comprising a left-right axial kiln body, a conversion shell is coaxially and rotatably connected to the kiln body, a liquid outlet pipe is arranged at the left end of the conversion shell, a left-right axial piston barrel with a leftward opening is arranged at the lower end of the conversion shell, a liquid inlet pipe is arranged at the left end of the piston barrel, and the free end of the liquid inlet pipe is communicated with the right end of the conversion shell; a piston plate is coaxially and slidably connected in the piston barrel, a moving pipe is coaxially arranged at the left end of the piston plate, a rotatable rotating column is coaxially arranged in the piston barrel, an annular guide groove is formed in the rotating column, and a guide column inserted into the guide groove is arranged in the moving pipe; the device is simple in structure, novel in conception, convenient to use and high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kiln firing, in particular to a waste heat recovery device for a rotary kiln. Background Art

[0002] A cement rotary kiln is a key device for producing cement. A large amount of waste heat is generated during the process of calcining cement. In the existing rotary kiln, the temperature in the cooling section at the tail of the kiln is as high as 1200°C during operation. In the past, a cold air blower group was used to blow cold air onto the surface of the rotary kiln body for forced cooling, and heat exchange with the surface of the rotary kiln body was achieved through forced convection of the air. However, this cooling method has the following defects: the hot air with a relatively high temperature after heat exchange is directly dissipated, resulting in waste of heat of the rotary kiln body, causing thermal pollution to the environment, and increasing the refrigeration cost of the rotary kiln body. Content of the Utility Model

[0003] In view of the above situation, in order to make up for the deficiencies of the prior art, the purpose of the utility model is to provide a waste heat recovery device for a rotary kiln, which effectively solves the problem of inconvenient waste heat recovery of the existing rotary kiln.

[0004] The technical solution it adopts is that the utility model includes a kiln body in the left - right axial direction. A conversion shell is coaxially and rotatably connected to the kiln body. A liquid outlet pipe is provided at the left end of the conversion shell. A piston cylinder in the left - right axial direction with an opening facing left is provided at the lower end of the conversion shell. An inlet pipe is provided at the left end of the piston cylinder. The free end of the inlet pipe is communicated with the right end of the conversion shell. A delivery pipe is provided at the right end of the piston cylinder and is located below the inlet pipe. A piston plate is coaxially and slidably connected in the piston cylinder. A moving pipe is coaxially provided at the left end of the piston plate. A rotatable rotating column is coaxially provided in the piston cylinder. An annular guide groove is formed on the rotating column. A guide post inserted into the guide groove is provided in the moving pipe.

[0005] Compared with the prior art, the beneficial effect of the utility model is that it can realize heat exchange between the cooling water in the conversion shell and the surface of the rotary kiln, heat the originally relatively cold cooling water to a set temperature, and thus realize the recovery and utilization of the heat of the rotary kiln for heating or power generation, etc. Description of the Drawings

[0006] Figure 1 is the main - view axonometric drawing of the utility model.

[0007] Figure 2 is the full - section main - view axonometric drawing of the utility model.

[0008] Figure 3 is the full - section left - view axonometric drawing of the utility model.

[0009] Figure 4 is the perspective axonometric drawing of the rotating column in the utility model.

[0010] Figure 5 is the utility modelFigure 2 Enlarged view of A

[0011] Reference numerals:

[0012] 1. Kiln body; 2. Conversion shell; 3. Liquid outlet pipe; 4. Piston cylinder; 5. Liquid inlet pipe; 6. Delivery pipe; 7. Piston plate; 8. Moving pipe; 9. Rotating column; 10. Guide groove; 11. Guide post; 12. Motor; 13. Valve; 14. Support block; 15. First one-way valve; 16. Second one-way valve; 17. Temperature measurement sensor Detailed implementation manners

[0013] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the matrix implementation disclosed below

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items

[0015] The following will further describe the detailed implementation manners of the present utility model with reference to the accompanying drawings

[0016] As shown by Figures 1 to 5 It includes a kiln body 1 in the left - right axial direction. A conversion shell 2 is coaxially rotatably connected to the kiln body 1. A liquid outlet pipe 3 is provided at the left end of the conversion shell 2. A piston cylinder 4 in the left - right axial direction with an opening facing left is provided at the lower end of the conversion shell 2. A liquid inlet pipe 5 is provided at the left end of the piston cylinder 4. The free end of the liquid inlet pipe 5 is communicated with the right end of the conversion shell 2. A delivery pipe 6 located below the liquid inlet pipe 5 is provided at the right end of the piston cylinder 4. A piston plate 7 is coaxially slidably connected in the piston cylinder 4. A moving pipe 8 is coaxially provided at the left end of the piston plate 7. A rotatable rotating column 9 is coaxially provided in the piston cylinder 4. An annular guide groove 10 is formed on the rotating column 9. A guide post 11 inserted into the guide groove 10 is provided in the moving pipe 8

[0017] In order to rotate the rotating column 9, a motor 12 coaxial with the piston cylinder 4 is provided at the lower end of the conversion shell 2, and the output shaft of the motor 12 is coaxially fixedly connected to the rotating column 9

[0018] In order to control the liquid outlet, a valve 13 is provided at the free end of the liquid outlet pipe 3

[0019] In order to facilitate the support of the conversion shell 2, support blocks 14 are respectively provided on the left and right sides of the conversion shell 2.

[0020] In order to facilitate the flow of liquid, a first one-way valve 15 with an opening facing right is provided in the liquid inlet pipe 5, and a second one-way valve 16 with an opening facing left is provided in the delivery pipe 6.

[0021] In order to facilitate the measurement of temperature, a temperature measurement sensor 17 is provided at the upper end of the conversion shell 2.

[0022] When the present utility model is in use, first connect the delivery pipe 6 to the liquid supply system. When the rotary kiln is operating, the internal heat is dissipated to the surface of the kiln body 1. At this time, start the motor 12. The motor 12 drives the rotating column 9 to rotate. The rotating column 9 drives the guiding groove 10 thereon to rotate and drives the moving pipe 8 to move leftward through the guiding column 11. The moving pipe 8 drives the piston plate 7 to move leftward. The leftward movement of the piston plate 7 reduces the pressure in the piston cylinder 4, and sucks the low-temperature cooling water into the piston cylinder 4 through the delivery pipe 6. After the rotating column 9 rotates a certain angle, at this time, the guiding column 11 is at the leftmost position of the guiding groove 10, and at this time, the piston plate 7 is on the left side in the piston cylinder 4. The motor 12 continues to rotate and starts to drive the moving pipe 8 to move rightward, and then drives the piston plate 7 to move rightward in the piston cylinder 4, and injects the cooling water sucked into the piston cylinder 4 into the conversion shell 2 through the water inlet pipe;

[0023] The motor 12 continues to rotate, driving the piston plate 7 to move left and right repeatedly in the piston cylinder 4, and then continuously injecting the coolant into the conversion shell 2. When sucking the cooling water from the liquid supply system, at this time, the first one-way valve 15 can prevent the cooling water in the conversion shell 2 from being re-sucked into the piston cylinder 4. At the same time, when injecting the cooling water into the conversion shell 2 through the liquid inlet pipe 5, at this time, the second one-way valve 16 can prevent the cooling water in the piston cylinder 4 from being re-squeezed into the delivery pipe 6. When the conversion shell 2 is filled with water, at this time, turn off the motor 12;

[0024] At this time, the heat generated by the kiln body 1 is fully heat-exchanged with the cooling water in the conversion shell 2, absorbing the heat dissipated by the kiln body 1 and increasing the temperature of the cooling water in the conversion shell 2. When the temperature measurement sensor 17 measures that the water temperature has risen to the set temperature, at this time, automatically open the valve 13 and the motor 12. The opening of the valve 13 allows the heated water to flow out and be collected to realize heat supply or power generation, etc., realizing waste heat recovery. At the same time, the motor 12 starts to continue injecting water into the conversion shell 2. When the temperature measurement sensor 17 detects a temperature drop, at this time, automatically turn off the motor 12.

[0025] Compared with the prior art, the beneficial effects of the utility model are as follows: The provided conversion shell, piston cylinder, etc. can realize the heat exchange between the cooling water in the conversion shell and the surface of the rotary kiln, heating the originally lower-temperature cooling water to a set temperature, thereby realizing the recovery and utilization of the heat of the rotary kiln for heating, power generation, etc. This structure is simple, novel in conception, convenient to use, and has strong practicability.

[0026] It should be noted that according to the needs of implementation, each component described in the embodiments of the present utility model can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of the present utility model.

[0027] The above embodiments only represent several implementation modes of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A rotary kiln waste heat recovery device, comprising a left and right axial kiln body (1), characterized in that: A conversion shell (2) is coaxially rotatably connected to the kiln body (1), a liquid outlet pipe (3) is provided at the left end of the conversion shell (2), a piston cylinder (4) with a left-right axial direction and an opening facing left is provided at the lower end of the conversion shell (2), a liquid inlet pipe (5) is provided at the left end of the piston cylinder (4), a free end of the liquid inlet pipe (5) is connected to the right end of the conversion shell (2), a delivery pipe (6) located below the liquid inlet pipe (5) is provided at the right end of the piston cylinder (4), a piston plate (7) is coaxially slidably connected inside the piston cylinder (4), a moving pipe (8) is coaxially provided at the left end of the piston plate (7), a rotatable rotating column (9) is coaxially provided inside the piston cylinder (4), an annular guide groove (10) is provided on the rotating column (9), and a guide column (11) inserted into the guide groove (10) is provided inside the moving pipe (8).

2. The rotary kiln waste heat recovery device according to claim 1, characterized in that: The lower end of the conversion housing (2) is provided with a motor (12) coaxial with the piston cylinder (4), and the output shaft of the motor (12) is coaxially fixedly connected with the rotating column (9).

3. The rotary kiln waste heat recovery device according to claim 1, characterized in that: The free end of the liquid outlet pipe (3) is provided with a valve (13).

4. The rotary kiln waste heat recovery device according to claim 1, characterized in that: Support blocks (14) are respectively provided on the left and right sides of the conversion shell (2).

5. The rotary kiln waste heat recovery device according to claim 1, characterized in that: A first one-way valve (15) with an opening facing right is provided in the liquid inlet pipe (5), and a second one-way valve (16) with an opening facing left is provided in the delivery pipe (6).

6. The rotary kiln waste heat recovery device according to claim 1, characterized in that: A temperature measuring sensor (17) is provided at the upper end of the conversion shell (2).

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