Rotary kiln tail chute cooling device

Abstract

The utility model belongs to the technical field of rotary kiln chute body devices, and particularly discloses a rotary kiln tail chute cooling device which comprises a chute body, the chute body is composed of nine chute plates, each chute plate is respectively communicated with a water inlet pipe and a water return pipe, and the water inlet pipe on each chute plate is lower than the water return pipe. The end, away from the chute plate, of the water inlet pipe communicates with a water inlet tank, the end, away from the chute plate, of the water return pipe communicates with two water return tanks, and the water inlet tank and the water return tanks are both located above the chute body. Cooling water is input into each chute plate through the water inlet pipe to cool the chute plates, and the used cooling water flows into the water return tanks at the two ends from the water return pipe after the height of the used cooling water is increased to be equal to that of the water return pipe, so that the cooling of the chute body is realized. The utility model has the advantages that the cooling in the chute is uniform, the weight of a single structure of the chute body is dispersed, the working intensity of personnel is reduced, and the high-temperature fracture of the chute body is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of rotary kiln chute body devices, specifically to a rotary kiln tail chute cooling device. Background Technology

[0002] A rotary kiln is a mechanical device used for the mechanical, physical, or chemical processing of solid materials. It is widely used in various production industries such as building materials, metallurgy, chemicals, and environmental protection. In the cement industry, rotary kilns are used to calcine cement clinker, clay, limestone, and to dry slag. In the non-ferrous and ferrous metallurgical industries, rotary kilns can also produce corresponding products. In the chemical industry, rotary kilns are mainly used to produce soda, calcine phosphate fertilizers, barium sulfide, and other chemical products. As can be seen, the application range of rotary kilns is very wide. However, the temperature at the kiln tail of a rotary kiln is very high, especially when processing refractory materials such as spinel. The high-temperature environment is even more prominent. Excessive temperature will cause the product to re-oxidize, reducing product quality. Therefore, cooling treatment of the kiln tail is required.

[0003] Chinese utility model patent CN 203758232 U, application number 201420133490.8, discloses a water-cooled kiln chute device, including a main water inlet pipe, inlet branch pipe valves, inlet branch pipes, chute bodies, connecting and fixing strips, and return water pipes. The inlet of each chute body is connected to one end of the corresponding inlet branch pipe, and the other end is connected to the main water inlet pipe. Each inlet branch pipe is equipped with an inlet valve. The return water inlet of each chute body is connected to one end of the corresponding return branch pipe, and the other end is connected to the main return water pipe. The connecting and fixing strips are bolted to each chute body. Cooling water enters the inlet branch pipes through the main water inlet pipe, then enters the chute body. The water flow in the inlet branch pipes is controlled by the inlet valves to ensure each chute body is filled with cooling water. The water then flows from the chute body into the return branch pipes and finally into the main return water pipe, achieving the purpose of cooling the rotary kiln.

[0004] The aforementioned patent discloses a water-cooled kiln chute device that solves the problem of excessively high kiln tail temperature by cooling the kiln tail with water. However, in practice, there are still some issues: the inlet and outlet water mains are lower than the chute body, and the cooling process is affected by the water flow rate and pressure, resulting in uneven cooling and localized overheating, which can lead to chute body rupture; the chute body is composed of three chute plates, and after a chute plate ruptures, the maintenance volume is too large, and the workload of the staff is heavy; moreover, the energy consumption is high, resulting in high operating costs. Utility Model Content

[0005] The purpose of this utility model is to provide a rotary kiln tail chute cooling device to solve the problems in the above-mentioned patent where the inlet and outlet water mains are lower than the chute body, and the cooling is affected by the water flow rate and pressure during water inlet cooling, resulting in uneven cooling and local overheating, which leads to the chute body cracking; the chute body is composed of three chute plates, and after the chute plate cracks, the maintenance volume is too large, the workload of the staff is large, and the energy consumption is high, resulting in high operating costs.

[0006] To achieve the above objectives, the basic solution provided by this utility model is as follows: a rotary kiln tail chute cooling device, comprising a chute body with an internal cavity, the chute body being composed of nine chute plates, each chute plate being connected to an inlet pipe and a return pipe, the inlet pipe on each chute plate being lower than the return pipe, the end of the inlet pipe away from the chute plate being connected to an inlet tank, and the end of the return pipe away from the chute plate being connected to two return tanks, both the inlet tank and the return tank being located above the chute body.

[0007] The principle and beneficial effects of this utility model are as follows: Cooling water is introduced into each chute section through the inlet pipe to cool the chute section. After use, the cooling water level rises to the same height as the return pipe and flows into the return tanks at both ends, thus cooling the chute body. The chute sections are divided from three to nine, reducing the weight of each section to one-third of the original chute structure weight, reducing the load and labor intensity during manufacturing and installation. Setting the inlet and return tanks above the chute body stabilizes the water flow, and the downward flow due to gravity reduces energy consumption. When the circulating water supply is interrupted, the cooling water in the high-level tank can be replenished to the chute body by gravity, mitigating the rapid temperature rise inside the chute body caused by a sudden water outage. Setting the inlet and return pipes to have a low-end inlet and a high-end outlet balances the inlet and return water within the chute, ensuring even cooling of the entire chute body.

[0008] Option 2, a preferred option of the basic scheme, features a cleaning port on each chute plate located in the high-temperature section. Each cleaning port is equipped with a sealing ring, and each chute plate has a hinged cover for opening and closing the cleaning port. The cleaning port, situated in the high-temperature section of the chute body, allows for cleaning of the interior of the chute plate in the high-temperature area by opening the cover, preventing the accumulation of scale and impurities after calcination.

[0009] Option 3, the preferred option of the basic scheme, is equipped with vent pipes on both return water tanks. The vent pipes release the pressure inside the chute. For example, in the event of a sudden water outage, the vent pipes allow the high-temperature water vapor pressure inside the chute to be quickly released through the return water pipes, preventing excessive internal pressure in the chute from causing cracks and leaks.

[0010] Option 4, an optimal choice from the basic option, features an opening at the tail end of each chute section, with a flange connecting each section to a sealing baffle that covers the opening. The sealing baffle at the tail end can be periodically opened to expose the opening, allowing for observation of the structure at the water inlet and outlet, and periodic cleaning of scale and other impurities.

[0011] Option 5, an optimal choice from the basic option, features a temperature gauge on the return water tank. This temperature gauge monitors the water temperature in the return water tank in real time to determine if the cooling system is operating normally, preventing overheating and damage to the equipment due to excessively high water temperatures.

[0012] Option 6, an optimal choice from the basic option, features a water valve on each inlet pipe. The water valve controls the water flow to each pipe; if a chute plate malfunctions, the corresponding inlet pipe valve closes the inlet channel, preventing further cooling water input. Attached Figure Description

[0013] Figure 1 This is a perspective view of a rotary kiln tail chute cooling device according to the present invention;

[0014] Figure 2 This is a perspective view of the opening feature 4 of the rotary kiln tail chute cooling device of this utility model;

[0015] Figure 3 This is a perspective view of a rotary kiln tail chute cooling device according to this utility model from another angle.

[0016] Figure 4 yes Figure 2 A magnified view of a portion of point A in the middle. Detailed Implementation

[0017] The present invention will be further described in detail below through specific embodiments:

[0018] The reference numerals in the accompanying drawings include: 1. chute body, 2. chute plate, 3. cleaning port, 4. cover plate, 5. water inlet pipe, 6. water return pipe, 7. water inlet tank, 8. water return tank, 9. vent pipe, 10. sealing baffle, 11. temperature regulator, 12. water valve, 13. sealing ring.

[0019] Example

[0020] The basic implementation examples are as follows: Figure 1 To be continued Figure 4As shown: A rotary kiln tail chute cooling device includes a chute body 1, the interior of which is hollow. The chute body 1 is composed of nine chute plates 2. Each chute plate 2 is connected to an inlet pipe 5 and a return pipe 6. The inlet pipe 5 on each chute plate 2 is lower than the return pipe 6. Each inlet pipe 5 is equipped with a water valve 12. The end of the inlet pipe 5 away from the chute plate 2 is connected to an inlet tank 7. The end of the return pipe 6 away from the chute plate 2 is connected to two return tanks 8. Both the inlet tank 7 and the return tanks 8 are located above the chute body 1. Each chute is equipped with an exhaust pipe 9, and each return water tank 8 is equipped with a temperature gearbox 11. The model of the temperature gearbox 11 is SRWZ-47WZPK2516. Each chute plate 2 has a cleaning port 3 located in the high-temperature section of the chute plate 2. Each cleaning port 3 is equipped with a sealing ring 13. Each chute plate 2 is hinged with a cover plate 4 for opening and closing the cleaning port 3. Each chute plate 2 has an opening at its tail end, and each chute plate 2 has a flange connecting a sealing baffle 10 at its tail end, which covers the opening.

[0021] The implementation method of this embodiment is as follows:

[0022] During the cooling process, the cooling water in the inlet tank 5 is first introduced into the corresponding chute plate 2 through nine inlet pipes 5 for thorough cooling. During the cooling process, the gas generated in the chute body 1 is introduced into the return water tank 8 through the return water pipe 6 and discharged through the exhaust pipe 9. Throughout the process, the return water temperature data needs to be transmitted to the monitoring room through the temperature transmission 11, and the staff monitors the return water temperature in real time through the data received in the monitoring room. As the cooling water rises, the cooled water is output from the nine return water pipes 6 to the two return water tanks 8 after cooling, thus completing one round of cooling.

[0023] When it is necessary to inspect and clean the scale inside the chute plate 2, after the staff arrives at the chute body 1, they first open the cover plate 4, and then clean the corresponding area inside the chute plate 2 through each cleaning port 3, which can complete the local cleaning of the high-temperature section of the chute body 1; remove the sealing baffle 10 at the tail of the chute plate 2 that needs to be inspected or cleaned, and observe the scale and impurity accumulation inside through the opening; finally, perform local cleaning of the cavity at the tail of the chute plate 2 to complete the cleaning of the scale at the tail of the chute plate 2.

[0024] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A rotary kiln tailing chute cooling device, characterized in that, The chute body (1) is internally hollow, and is composed of nine chute plate blocks (2). Each chute plate block (2) is respectively communicated with a water inlet pipe (5) and a water return pipe (6). The water inlet pipe (5) on each chute plate block (2) is lower than the water return pipe (6). The water inlet pipe (5) is communicated with a water inlet tank (7) at an end away from the chute plate block (2). The water return pipe (6) is respectively communicated with two water return tanks (8) at an end away from the chute plate block (2). The water inlet tank (7) and the water return tank (8) are located above the chute body (1).

2. A rotary kiln tailing chute cooling device according to claim 1, characterized in that, Each chute plate block (2) is provided with a cleaning port (3) at a high-temperature section of the chute plate block (2). Each cleaning port (3) is provided with a sealing ring (13). Each chute plate block (2) is hingedly connected with a cover plate (4) for opening and closing the cleaning port.

3. A rotary kiln tailing chute cooling device according to claim 1, characterized in that, Each water return tank (8) is provided with an exhaust pipe (9).

4. A rotary kiln tailing chute cooling device according to claim 1, characterized in that, The tail end of each chute plate block (2) is provided with an opening. The tail end of each chute plate block (2) is flange-connected with a sealing baffle (10) covering the opening.

5. A rotary kiln tailing chute cooling device according to claim 1, characterized in that, Each water return tank (8) is provided with a temperature variator (11).

6. A rotary kiln tailing chute cooling device according to claim 1, characterized in that, Each water inlet pipe (5) is provided with a water valve (12).

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