Rotary kiln tail gas cooling device

Abstract

The utility model discloses a rotary kiln tail gas cooling device which comprises a cooling exhaust pipe, a water inlet pipe bent upwards is installed on the outer wall of one side of the bottom of the cooling exhaust pipe through a hole, and a water outlet pipe bent downwards is installed on the outer wall of one side of the top of the cooling exhaust pipe through a hole. Water pipe rotating joints are installed at one end of the top of the water inlet pipe and one end of the bottom of the water outlet pipe, rotating shafts are installed on the inner walls of the two water pipe rotating joints, and water grooves are formed in one ends of the tops and the bottoms of the rotating shafts. The cooling fan is driven by the rotating shaft to rotate, the contact effect between the cooling fan and high-temperature tail gas is improved in the rotating process of the cooling fan, water is input into the water tank at the bottom of the rotating shaft through the water inlet pipe and input into the cooling cavity formed in the cooling fan through the liquid guide pipe, and the water in the cooling cavity passes through the other liquid guide pipe and the water tank and is discharged through the water outlet pipe. And water flows in the cooling cavity formed in the cooling fan, so that the cooling effect of the rotary kiln is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling equipment, in particular to a rotary kiln tail gas cooling device. Background Art

[0002] Rotary kilns can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to the different materials they process. Cement kilns are mainly used to calcine cement clinker and are divided into two categories: dry process cement kilns and wet process cement kilns.

[0003] The rotary kiln will produce a large amount of high-temperature gas during the high-temperature calcination process. The high-temperature gas contains a large amount of impurities and needs to be filtered. The existing rotary kiln tail gas is filtered by filter bags. The filter bags are easy to burn through in a high-temperature environment. Therefore, the tail gas of the rotary kiln needs to be cooled;

[0004] However, the high-temperature exhaust gas of the rotary kiln is generated at a fast speed and with a large flow rate. The existing traditional cooling equipment is fixed in the exhaust gas channel by being stationary, and the cooling surface of the cooling equipment has poor contact with the high-temperature exhaust gas, and the cooling effect on the exhaust gas is insufficient. In order to improve the cooling effect of the rotary kiln exhaust gas, we proposed a rotary kiln exhaust gas cooling device. Utility Model Content

[0005] The utility model aims to provide a rotary kiln tail gas cooling device to solve the above-mentioned technical deficiencies.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a rotary kiln tail gas cooling device comprises a cooling exhaust pipe, an outer wall of one side of the bottom of the cooling exhaust pipe is installed with an upward curved water inlet pipe through an opening, and an outer wall of one side of the top of the cooling exhaust pipe is installed with a downward curved water outlet pipe through an opening, a top end of the water inlet pipe and a bottom end of the water outlet pipe are both installed with a water pipe rotating joint, a rotating shaft is installed on the inner wall of the two water pipe rotating joints, the top and bottom ends of the rotating shaft are both provided with water grooves, the outer wall of the rotating shaft is fixedly provided with cooling fans distributed at equal intervals, a cooling cavity is provided inside the cooling fan, the outer walls of the two water grooves are connected with liquid guide pipes distributed at equal intervals through openings, the other ends of the liquid guide pipes are respectively connected with the top and bottom ends of the cooling cavity, the top and bottom outer walls of the rotating shaft are fixedly provided with fixing rings, and the outer wall of the fixing ring is fixedly provided with paddles distributed at equal intervals.

[0007] Preferably, the bottom end of the cooling exhaust pipe is connected to an air inlet pipe, through which high-temperature exhaust gas can enter the cooling exhaust pipe, and the top end of the cooling exhaust pipe is connected to an air outlet pipe, through which the cooled exhaust gas in the cooling exhaust pipe can be discharged.

[0008] Preferably, the central axis of the rotating shaft and the central axis of the cooling exhaust pipe are located on the same straight line.

[0009] Preferably, the outer walls on both sides of the cooling fan are fixed with equidistantly distributed heat dissipation fins, and the outer walls of the heat dissipation fins are opened with equidistantly distributed heat dissipation holes. The heat dissipation fins are helpful to increase the contact area between the utility model and the high-temperature exhaust gas, which is helpful to increase the cooling effect of the utility model.

[0010] Preferably, the water inlet pipe is provided with a first valve, a first pipe joint is fixedly provided on the outer wall of one end of the water inlet pipe, the water outlet pipe is provided with a second valve, and a second pipe joint is fixedly provided on the outer wall of one end of the second valve.

[0011] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0012] The high-temperature airflow passes through the outer walls of the two blades in the cooling exhaust pipe, and the rotating shaft is fixed between the water inlet pipe and the water outlet pipe through two water pipe rotating joints, driving the rotating shaft to rotate inside the cooling exhaust pipe, and driving the cooling fan to rotate through the rotating shaft. The contact effect with the high-temperature exhaust gas is improved during the rotation of the cooling fan. Water is input into the water tank at the bottom of the rotating shaft through the water inlet pipe, and the water is input into the cooling cavity opened in the cooling fan through the liquid guide pipe. The water in the cooling cavity is discharged through the water outlet pipe through another liquid guide pipe and the water tank. In combination with the water flowing in the cooling cavity opened in the cooling fan, the cooling effect of the rotary kiln is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0014] Figure 1 This is a three-dimensional structural schematic diagram of a rotary kiln tail gas cooling device of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of a cooling exhaust pipe of a rotary kiln tail gas cooling device of the utility model;

[0016] Figure 3 This is a schematic diagram of the rotating shaft structure of a rotary kiln tail gas cooling device of the utility model;

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of a rotary shaft of a rotary kiln tail gas cooling device of the utility model;

[0018] Figure 5This is a schematic diagram of the cooling fan structure of a rotary kiln tail gas cooling device of the utility model;

[0019] Figure 6 The utility model is a schematic diagram of the cross-sectional structure of a cooling fan of a rotary kiln tail gas cooling device.

[0020] Description of reference numerals:

[0021] 1 cooling exhaust pipe, 2 air inlet pipe, 3 air outlet pipe, 4 water inlet pipe, 5 water outlet pipe, 6 water pipe swivel joint, 7 rotating shaft, 8 fixing ring, 9 blade, 10 water tank, 11 cooling fan, 12 cooling cavity, 13 liquid guide pipe, 14 heat dissipation fin, 15 heat dissipation hole, 16 first valve, 17 first pipe joint, 18 second valve, 19 second pipe joint. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] Embodiment 1

[0024] Refer to the instruction manual Figure 1-6 A rotary kiln tail gas cooling device comprises a cooling exhaust pipe 1, a water inlet pipe 4 bent upward is installed on the outer wall of one side of the bottom of the cooling exhaust pipe 1 through an opening, a water outlet pipe 5 bent downward is installed on the outer wall of one side of the top of the cooling exhaust pipe 1 through an opening, a water pipe rotating joint 6 is installed on the top end of the water inlet pipe 4 and the bottom end of the water outlet pipe 5, a rotating shaft 7 is installed on the inner wall of the two water pipe rotating joints 6, a water trough 10 is opened on the top and bottom ends of the rotating shaft 7, and cooling fans 11 distributed at equal intervals are fixedly arranged on the outer wall of the rotating shaft 7, a cooling cavity 12 is opened inside the cooling fan 11, the outer walls of the two water troughs 10 are connected with liquid guide pipes 13 distributed at equal intervals through openings, and the other ends of the liquid guide pipes 13 are respectively connected to the top and bottom ends of the cooling cavity 12, a fixing ring 8 is fixedly arranged on the top and bottom outer walls of the rotating shaft 7, and paddles 9 distributed at equal intervals are fixedly arranged on the outer wall of the fixing ring 8.

[0025] Embodiment 2

[0026] Based on the first embodiment, the central axis of the rotating shaft 7 and the central axis of the cooling exhaust pipe 1 are located on the same straight line. The bottom end of the cooling exhaust pipe 1 is connected to the air intake pipe 2, through which the high-temperature exhaust gas can enter the cooling exhaust pipe 1. The top end of the cooling exhaust pipe 1 is connected to the air outlet pipe 3, through which the exhaust gas that has been cooled in the cooling exhaust pipe 1 can be discharged.

[0027] Embodiment 3

[0028] Based on the first embodiment, the outer walls of both sides of the cooling fan 11 are fixed with equidistantly distributed heat dissipating fins 14, and the outer walls of the heat dissipating fins 14 are opened with equidistantly distributed heat dissipating holes 15. The heat dissipating fins 14 are helpful to increase the contact area between the utility model and the high-temperature exhaust gas, which is beneficial to increase the cooling effect of the utility model. A first valve 16 is provided on the water inlet pipe 4, and a first pipe joint 17 is fixedly provided on the outer wall of one end of the water inlet pipe 4. A second valve 18 is provided on the water outlet pipe 5, and a second pipe joint 19 is fixedly provided on the outer wall of one end of the second valve 18.

[0029] Working principle of this utility model:

[0030] Refer to the instruction manual Figure 1-6 When the utility model is used, water is input into the water tank 10 at the bottom of the rotating shaft 7 through the water inlet pipe 4, and the water is input into the cooling chamber 12 opened in the cooling fan 11 through the liquid guide pipe 13. The water in the cooling chamber 12 is discharged through the water outlet pipe 5 through another liquid guide pipe 13 and the water tank 10, and the high-temperature exhaust gas is input into the cooling exhaust pipe 1 through the air inlet pipe 2. The high-temperature airflow passes through the outer walls of the two blades 9 in the cooling exhaust pipe 1. The rotating shaft 7 is fixed between the water inlet pipe 4 and the water outlet pipe 5 through two water pipe rotating joints 6, driving the rotating shaft 7 to rotate inside the cooling exhaust pipe 1, and driving the cooling fan 11 to rotate through the rotating shaft 7. The contact effect between the cooling fan 11 and the high-temperature exhaust gas is improved during the rotation process. In combination with the water flowing in the cooling chamber 12 opened in the cooling fan 11, the cooling effect of the rotary kiln is greatly improved. After the high-temperature exhaust gas is cooled, it is discharged into the subsequent exhaust gas treatment device through the outlet pipe 3.

[0031] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A rotary kiln tail gas cooling device, comprising a cooling exhaust pipe (1), characterized in that: An upwardly curved water inlet pipe (4) is installed through an opening on the outer wall of the bottom side of the cooling exhaust pipe (1); a downwardly curved water outlet pipe (5) is installed through an opening on the outer wall of the top side of the cooling exhaust pipe (1); a water pipe rotating joint (6) is installed at the top end of the water inlet pipe (4) and the bottom end of the water outlet pipe (5); a rotating shaft (7) is installed on the inner wall of the two water pipe rotating joints (6); a water groove (10) is opened at the top and bottom ends of the rotating shaft (7); The outer wall of the rotating shaft (7) is fixedly provided with cooling fans (11) distributed at equal intervals, and a cooling chamber (12) is opened inside the cooling fan (11). The outer walls of the two water tanks (10) are connected to liquid guide tubes (13) distributed at equal intervals through openings, and the other ends of the liquid guide tubes (13) are respectively connected to the top and bottom ends of the cooling chamber (12). The top and bottom outer walls of the rotating shaft (7) are fixedly provided with fixing rings (8), and the outer wall of the fixing rings (8) is fixedly provided with paddles (9) distributed at equal intervals.

2. A rotary kiln tail gas cooling device according to claim 1, characterized in that: One end of the bottom of the cooling exhaust pipe (1) is connected to an air inlet pipe (2), and one end of the top of the cooling exhaust pipe (1) is connected to an air outlet pipe (3).

3. A rotary kiln tail gas cooling device according to claim 1, characterized in that: The central axis of the rotating shaft (7) and the central axis of the cooling exhaust pipe (1) are located on the same straight line.

4. A rotary kiln tail gas cooling device according to claim 1, characterized in that: The outer walls of both sides of the cooling fan (11) are fixedly provided with heat dissipation fins (14) distributed at equal distances, and the outer walls of the heat dissipation fins (14) are provided with heat dissipation holes (15) distributed at equal distances.

5. The rotary kiln tail gas cooling device according to claim 1, characterized in that: The water inlet pipe (4) is provided with a first valve (16), and a first pipe joint (17) is fixedly provided on the outer wall of one end of the water inlet pipe (4). The water outlet pipe (5) is provided with a second valve (18), and a second pipe joint (19) is fixedly provided on the outer wall of one end of the second valve (18).

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