A cold air cooling device for the inlet of a cement kiln head waste heat furnace

Abstract

This utility model relates to the technical field of cement processing equipment, and in particular to a cold air cooling device for the inlet of a cement kiln head waste heat furnace. It includes a cold air duct, a connecting interface, and reinforcing rings. The input end of the cold air duct is connected to the connecting interface, which is connected to the tube cooler pipe of a grate cooler. The connecting interface is funnel-shaped. Multiple sets of reinforcing rings are fixedly installed around the cold air duct, and these rings are evenly arranged along the axis of the cold air duct. This utility model connects the cold air duct to the tube cooler pipe of the grate cooler through the connecting interface, thereby allowing the waste air from the grate cooler to cool the high-temperature gas, achieving cascade utilization of waste heat. The funnel-shaped design of the connecting interface reduces eddy current generation and ensures stable delivery of the cooling gas. The reinforcing rings enhance the structural strength of the cold air duct and increase its surface area, allowing some heat to dissipate as the waste air from the grate cooler is transported within the cold air duct, thus improving the cooling effect on the high-temperature gas.

Description

Technical Field

[0001] This utility model relates to the technical field of cement processing equipment, and in particular to a cold air cooling device for the inlet of a cement kiln head waste heat furnace. Background Technology

[0002] In the cement production process, the high-temperature gas at the front end of the kiln head grate cooler usually enters the waste heat boiler directly for heat recovery. However, due to the excessively high temperature of the kiln head flue gas, direct entry into the waste heat boiler can cause overheating and damage to the boiler tube bundle, affecting the equipment's lifespan and safe operation. Therefore, it is necessary to cool the high-temperature gas.

[0003] Currently, a simple method of introducing cold air is commonly used to cool high-temperature gases. Although the introduced cold air can effectively cool the high-temperature gases, it will increase the workload of the system. Furthermore, directly introducing cold air can easily lead to large fluctuations in the inlet temperature of the waste heat boiler, affecting the efficiency of waste heat recovery.

[0004] Therefore, to address the above issues, a cold air cooling device for the inlet of a cement kiln head waste heat furnace can be designed. By using waste air from a grate cooler, not only can the waste heat be utilized in stages, but it can also prevent large fluctuations in the inlet temperature of the waste heat boiler, which would affect the waste heat recovery efficiency. Utility Model Content

[0005] To overcome the current common practice of using simple cold air mixing to cool high-temperature gases, although the introduced cold air can effectively cool the high-temperature gases, it increases the system's workload. Furthermore, directly introducing cold air can easily lead to large fluctuations in the inlet temperature of the waste heat boiler, affecting the efficiency of waste heat recovery.

[0006] The technical solution of this utility model is as follows: a cold air cooling device for the inlet of a cement kiln head waste heat furnace, comprising a cold air duct, a connecting interface, reinforcing rings, and an installation component. The input end of the cold air duct is connected to the connecting interface, which is connected to the tube cooler pipe of the grate cooler. The connecting interface is flared in shape. Multiple sets of reinforcing rings are fixedly installed on the periphery of the cold air duct. The multiple sets of reinforcing rings are evenly arranged along the axis of the cold air duct. The cold air duct is inclined at 30° relative to the ground. The installation component is located below the cold air duct.

[0007] Preferably, the cold air duct is connected to the tube cooler pipe of the grate cooler by setting an interface, so that the waste air of the grate cooler can be used to cool the high-temperature gas, realizing the cascade utilization of waste heat. The horn-shaped setting of the interface can reduce the generation of eddies and ensure the stable delivery of cooling gas. The addition of a reinforcing ring can enhance the structural strength of the cold air duct and increase its surface area, so that when the waste air of the grate cooler is transported in the cold air duct, some heat can be dissipated, improving the cooling effect on the high-temperature gas. The cold air duct is set at a 30° inclination to prevent debris in the waste air from accumulating in the pipe and causing blockage. The cold air duct is supported and installed by setting an installation component.

[0008] Preferably, the surface of the reinforcing ring has multiple sets of heat dissipation textures, which are evenly arranged in a circle around the axis of the reinforcing ring.

[0009] Preferably, the installation components include a support frame and a maintenance platform, with the support frame fixedly installed at the lower end of the cold air duct and the maintenance platform fixedly installed at the lower end of the support frame.

[0010] Preferably, a compensating expansion joint is fixedly installed in the middle of the cold air duct.

[0011] Preferably, the inner wall of the air duct is coated with a wear-resistant coating, which is made of high-alumina wear-resistant castable.

[0012] Preferably, a distributor is connected to the output end of the cold air duct, and the distributor is connected to the inlet of the waste heat boiler.

[0013] As a preferred option, the cooling duct is equipped with an internal regulating valve, which is an electric butterfly valve.

[0014] The beneficial effects of this utility model are:

[0015] By connecting the cold air duct to the tube cooler pipe of the grate cooler through the interface, the waste air from the grate cooler is used to cool the high-temperature gas, realizing the cascade utilization of waste heat. The horn-shaped design of the interface can reduce the generation of eddies and ensure stable delivery of cooling gas. The reinforcing ring can enhance the structural strength of the cold air duct and increase its surface area. The heat dissipation texture can further increase the surface area of ​​the reinforcing ring, so that when the waste air from the grate cooler is transported in the cold air duct, some heat can be dissipated, improving the cooling effect on the high-temperature gas. The cold air duct is set at a 30° inclination to prevent debris in the waste air from accumulating and causing blockage in the pipe. Utilizing the waste air from the grate cooler can reduce the workload of the system and prevent large fluctuations in the inlet temperature of the waste heat boiler, which would affect the waste heat recovery efficiency. Attached Figure Description

[0016] Figure 1 The diagram shown is a first three-dimensional structural schematic of the inlet cold air cooling device for the waste heat furnace at the cement kiln head according to this utility model.

[0017] Figure 2 The diagram shown is a second three-dimensional structural schematic of the inlet cold air cooling device for the waste heat furnace at the cement kiln head according to this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional cross-sectional view of the cold air duct of the inlet cold air cooling device for the waste heat furnace at the cement kiln head according to this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of the reinforcing ring of the inlet cold air cooling device for the waste heat furnace at the cement kiln head according to this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Cooling duct; 101. Connecting interface; 102. Reinforcing ring; 103. Heat dissipation texture; 201. Support frame; 202. Maintenance platform; 3. Compensating expansion joint; 4. Wear-resistant coating; 5. Diverter; 6. Regulating valve. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figure 1 and Figure 2 This utility model provides an embodiment: a cold air cooling device for the inlet of a cement kiln head waste heat furnace, including a cold air duct 1, a coupling interface 101, reinforcing rings 102, and an installation assembly. The input end of the cold air duct 1 is connected to the coupling interface 101, which is connected to the tube cooler pipe of the grate cooler. The coupling interface 101 is trumpet-shaped. Multiple sets of reinforcing rings 102 are fixedly installed on the periphery of the cold air duct 1, and the multiple sets of reinforcing rings 102 are evenly arranged along the axis of the cold air duct 1. The cold air duct 1 is inclined at 30° relative to the ground. The installation assembly is located below the cold air duct 1. The cold air duct 1 is connected to the grate cooler by the coupling interface 102. The tube cooler pipes of the grate cooler are connected, so that the waste air of the grate cooler can be used to cool the high-temperature gas, realizing the cascade utilization of waste heat. The horn-shaped setting of the interface 101 can reduce the generation of eddies and ensure the stable delivery of cooling gas. The reinforcement ring 102 can enhance the structural strength of the cold air pipe 1 and increase the surface area of ​​the cold air pipe 1, so that when the waste air of the grate cooler is delivered in the cold air pipe 1, some heat can be dissipated, improving the cooling effect on the high-temperature gas. The cold air pipe 1 is set at a 30° inclination to prevent the accumulation of debris in the waste air and blockage in the pipe. The cold air pipe 1 is supported and installed by setting the installation components.

[0023] Please see Figure 1 and Figure 4In this embodiment, multiple sets of heat dissipation textures 103 are formed on the surface of the reinforcing ring 102, and the multiple sets of heat dissipation textures 103 are evenly arranged in a circle around the axis of the reinforcing ring 102. By setting the heat dissipation textures 103, the surface area of ​​the reinforcing ring 102 can be further increased, thereby improving the heat dissipation efficiency. The installation component includes a support frame 201 and a maintenance platform 202. The support frame 201 is fixedly installed at the lower end of the cold air duct 1, and the maintenance platform 202 is fixedly installed at the lower end of the support frame 201. The support frame 201 is set to support and install the cold air duct 1, and the maintenance platform 202 is set to facilitate the daily inspection and maintenance of the cold air duct 1 by the operator. A compensating expansion joint 3 is fixedly installed in the middle of the cold air duct 1. By setting the compensating expansion joint 3, the displacement of the cold air duct 1 during the thermal expansion and contraction process can be absorbed, ensuring the installation stability of the cold air duct 1.

[0024] Please see Figure 2 and Figure 3 In this embodiment, the inner wall of the cold air duct 1 is coated with a wear-resistant coating 4, which is made of high-alumina wear-resistant castable. The wear-resistant coating 4 can improve the wear resistance of the cold air duct 1. A distributor 5 is connected through the output end of the cold air duct 1 and is connected to the inlet of the waste heat boiler. By setting the distributor 5, the waste air transported by the cold air duct 1 can be evenly transported to the interior of the waste heat boiler, guiding the waste air and high-temperature gas to mix evenly. A regulating valve 6 is set inside the cold air duct 1. The regulating valve 6 is an electric butterfly valve. By setting the regulating valve 6, the waste air input can be stably adjusted to prevent large fluctuations in the inlet temperature of the waste heat boiler.

[0025] During operation, the support frame 201 is used to support and install the cold air duct 1, and the maintenance platform 202 is set up to facilitate the daily inspection and maintenance of the cold air duct 1 by the operators.

[0026] The cold air duct 1 is connected to the tube cooler pipe of the grate cooler via interface 101, thereby using the waste air of the grate cooler to cool the high-temperature gas and realize the cascade utilization of waste heat. The horn-shaped setting of interface 101 can reduce the generation of eddies and ensure the stable delivery of cooling gas. The reinforcing ring 102 can enhance the structural strength of the cold air duct 1 and increase the surface area of ​​the cold air duct 1. The heat dissipation texture 103 can further increase the surface area of ​​the reinforcing ring 102, so that when the waste air of the grate cooler is delivered in the cold air duct 1, some heat can be dissipated, improving the cooling effect on the high-temperature gas. The cold air duct 1 is set at a 30° angle to prevent debris in the waste air from accumulating in the pipe and causing blockage. The wear-resistant coating 4 inside the cold air duct 1 can improve the wear resistance of the cold air duct 1.

[0027] During normal operation, the expansion joint 3 can absorb the displacement of the cold air pipe 1 during thermal expansion and contraction, ensuring the stable installation of the cold air pipe 1. The regulating valve 6 can be used to achieve stable adjustment of the residual air input, preventing large fluctuations in the inlet temperature of the waste heat boiler. The distributor 5 can be used to evenly transport the residual air conveyed by the cold air pipe 1 into the interior of the waste heat boiler, guiding the residual air and high-temperature gas to mix evenly.

[0028] Through the above steps, the cold air duct 1 is connected to the tube cooler pipe of the grate cooler via interface 101, thereby enabling the use of the waste air from the grate cooler to cool the high-temperature gas, achieving cascade utilization of waste heat. The horn-shaped design of interface 101 reduces eddy current generation and ensures stable delivery of cooling gas. The reinforcing ring 102 enhances the structural strength of the cold air duct 1 and increases its surface area, allowing some heat to dissipate as the waste air from the grate cooler is transported within the cold air duct 1, thus improving the cooling effect on the high-temperature gas. This addresses the current problem of using simple cold air mixing to cool high-temperature gas, which, while effectively cooling the gas, increases the system's workload. Furthermore, directly introducing cold air can easily lead to large fluctuations in the inlet temperature of the waste heat boiler, affecting waste heat recovery efficiency.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A cement kiln head waste heat boiler import cold air cooling device, comprising a cold air pipe (1), characterized in that: It also includes a connector (101), reinforcing rings (102) and mounting components. The input end of the cold air duct (1) is connected to the connector (101). The connector (101) is connected to the tube cooler pipe of the grate cooler. The connector (101) is horn-shaped. Multiple sets of reinforcing rings (102) are fixedly installed on the periphery of the cold air duct (1). The multiple sets of reinforcing rings (102) are evenly arranged along the axis of the cold air duct (1). The cold air duct (1) is set at an angle of 30° relative to the ground. The mounting components are set below the cold air duct (1).

2. The cement kiln head waste heat boiler inlet cold air cooling device according to claim 1, characterized in that: The surface of the reinforcing ring (102) has multiple sets of heat dissipation textures (103), which are evenly arranged in a circle around the axis of the reinforcing ring (102).

3. The cement kiln head waste heat boiler inlet cold air cooling device according to claim 1, characterized in that: The installation components include a support frame (201) and a maintenance platform (202). The support frame (201) is fixedly installed at the lower end of the cold air duct (1), and the maintenance platform (202) is fixedly installed at the lower end of the support frame (201).

4. The inlet cold air cooling device for a cement kiln head waste heat furnace according to claim 1, characterized in that: A compensating expansion joint (3) is fixedly installed in the middle of the cold air duct (1).

5. The cement kiln head waste heat boiler inlet cold air cooling device according to claim 1, characterized in that: The inner wall of the cold air duct (1) is coated with a wear-resistant coating (4), which is made of high-alumina wear-resistant castable.

6. The cement kiln head waste heat boiler inlet cold air cooling device according to claim 1, characterized in that: The output end of the cold air duct (1) is connected to a distributor (5), which is connected to the inlet of the waste heat boiler.

7. The cement kiln head waste heat boiler inlet cold air cooling device according to claim 1, characterized in that: The cold air duct (1) is equipped with a regulating valve (6), which is an electric butterfly valve.

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