Cement manufacturing waste heat recovery equipment

Abstract

The utility model relates to cement manufacturing waste heat recovery equipment, which relates to the technical field of cement manufacturing, and comprises a water tank, a water inlet pipe, a water outlet pipe, a flue gas pipeline arranged in the water tank, and a first partition plate, a second partition plate and a turbulent flow assembly which are arranged in the water tank, the water inlet pipe and the water outlet pipe are arranged on the two opposite sides of the water tank respectively, the water inlet pipe is connected with a water pump, one end of the first partition plate is connected with the bottom of the water tank, and a gap is formed between the other end of the first partition plate and the top of the water tank. The first partition plate and the second partition plate are distributed in the water tank at intervals, the flue gas pipeline is distributed between the first partition plate and the second partition plate in a snake shape, and the turbulent flow assembly is used for stirring water in the water tank. Heat of high-temperature flue gas is absorbed through water in the water tank, the heat exchange efficiency is high, energy waste is effectively reduced, and the heat recovery efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of cement manufacturing technology, and in particular to a cement manufacturing waste heat recovery device. Background Technology

[0002] Cement is a powdery hydraulic inorganic binder that, when mixed with water, forms a paste that hardens in air or water and can firmly bind materials such as sand and stone together. Early mixtures of lime and volcanic ash are very similar to modern lime-volcanic ash cement. Concrete made by binding crushed stone with cement not only has high strength after hardening but also resists erosion from fresh or salt water. For a long time, cement has been widely used as an important binder in civil engineering, water conservancy, and national defense projects. With social development, the application of cement has become increasingly widespread.

[0003] During cement manufacturing, raw materials are heated at high temperatures in a rotary kiln. This heating process generates a large amount of high-temperature gas, which, when directly released, results in significant energy waste and contradicts the principles of energy conservation and environmental protection. Therefore, a waste heat recovery system for cement manufacturing is needed to recover heat from the production process. However, current waste heat recovery equipment has relatively low heat recovery efficiency. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a waste heat recovery device for cement manufacturing.

[0005] This application provides a waste heat recovery device for cement manufacturing, which adopts the following technical solution:

[0006] A waste heat recovery device for cement manufacturing includes a water tank, an inlet pipe, an outlet pipe, a flue gas duct disposed inside the water tank, a first partition plate, a second partition plate, and a turbulence-disrupting component disposed inside the water tank. The inlet pipe and the outlet pipe are respectively disposed on opposite sides of the water tank. The inlet pipe is connected to a water pump. One end of the first partition plate is connected to the bottom of the water tank, and the other end has a gap with the top of the water tank. One end of the second partition plate is connected to the top of the water tank, and the other end has a gap with the bottom of the water tank. The first partition plate and the second partition plate are distributed at intervals in the water tank. The flue gas duct is distributed in a serpentine pattern between the first partition plate and the second partition plate. The turbulence-disrupting component is used to agitate the water in the water tank.

[0007] By adopting the above technical solution, the flue gas duct inside the water tank is arranged in a serpentine pattern between the first and second partition plates, increasing the contact area between the flue gas and water, thereby improving the efficiency of heat exchange. The first and second partition plates are spaced apart in the water tank, with one end connected to the bottom or top of the tank and the other end left with a gap. This design extends the water flow path, increasing the contact time between the water and the flue gas, further enhancing the heat transfer effect. The turbulence-inducing component agitates the water in the tank, breaking the stillness of the water and promoting the heat exchange process between the water and the flue gas, ensuring uniform temperature distribution and preventing localized overheating.

[0008] Preferably, the turbulence-disrupting component includes a drive motor disposed on the outer wall of the water tank and a stirring blade disposed inside the water tank, wherein the stirring blade is fixedly connected to the drive shaft of the drive motor.

[0009] By adopting the above technical solution, the turbulence component drives the stirring blades of the transmission motor to stir the water in the water tank, which increases the turbulence of the water flow, enhances the heat transfer efficiency, and thus better absorbs the heat in the flue gas and improves the waste heat recovery effect.

[0010] Preferably, the inlet pipe is located at the bottom of the water tank, the outlet pipe is located at the top of the water tank, the first partition plate is located on the side of the water tank near the inlet pipe, and the second partition plate is located on the side of the water tank near the outlet pipe.

[0011] By adopting the above technical solution, the inlet pipe is located at the bottom of the water tank, and the outlet pipe is located at the top, allowing the water to flow from bottom to top, thus enhancing the heat exchange efficiency between the water and the flue gas. Simultaneously, the first and second partition plates are respectively located on the sides of the water tank near the inlet and outlet pipes, further extending the water's residence time within the tank and improving heat transfer. This design not only improves the efficiency of waste heat recovery but also optimizes the overall structural layout of the equipment.

[0012] Preferably, the flow direction of the flue gas in the flue gas duct is opposite to the flow direction of the water in the water tank.

[0013] By adopting the above technical solution, the flow direction of flue gas in the flue gas duct is opposite to the flow direction of water in the water tank, resulting in counter-current flow of flue gas and water. This design can significantly improve heat exchange efficiency, thereby making fuller use of the heat in the flue gas and enhancing the waste heat recovery effect. At the same time, counter-current flow can also reduce thermal stress caused by temperature differences, reduce the risk of equipment damage, and extend service life.

[0014] Preferably, the flue gas duct is provided with multiple heat exchange fins.

[0015] By adopting the above technical solution, setting multiple heat exchange fins on the flue gas duct can significantly increase the contact area between flue gas and water, improve heat transfer efficiency, and thus more effectively recover waste heat.

[0016] Preferably, the outer wall of the water tank is provided with a heat insulation layer.

[0017] By adopting the above technical solution, the insulation layer on the outer wall of the water tank can effectively reduce heat loss, improve the utilization rate of thermal energy, and ensure that the water temperature in the water tank is maintained at a high level, thereby enhancing the waste heat recovery efficiency.

[0018] Preferably, both the inlet and outlet ends of the flue gas duct extend out of the water tank, and a sealing ring is provided at the point where the flue gas duct extends out of the water tank.

[0019] By adopting the above technical solution, both the inlet and outlet ends of the flue gas duct extend out of the water tank, and a sealing ring is installed at the outlet position. This effectively prevents outside air from entering the water tank and affecting the heat exchange efficiency, while also avoiding water leakage from the water tank, thus improving the reliability and safety of the equipment.

[0020] Preferably, the flue gas duct is provided with a filter assembly at the air inlet end. The filter assembly includes a filter box and a filter element. The filter box is connected to the flue gas duct, and the filter element is disposed in the filter box.

[0021] By adopting the above technical solutions, impurities in the flue gas can be effectively prevented from entering the flue gas duct, reducing the risk of duct blockage and improving the stability and reliability of the system. At the same time, the filter components can extend the service life of the flue gas duct and reduce maintenance costs.

[0022] In summary, this application has the following beneficial technical effects:

[0023] 1. By setting a first partition plate and a second partition plate inside the water tank and distributing them at intervals, the water flow path becomes more complex, increasing the heat exchange time and the contact area between the water and the flue gas pipe during the heat exchange process, thereby improving the heat exchange efficiency of the entire system.

[0024] 2. The flue gas duct is distributed in a serpentine pattern between the first and second partition plates, which prolongs the contact time between the flue gas and water, further enhances the heat exchange effect, and reduces energy loss;

[0025] 3. The turbulence component drives the stirring blades of the drive motor to stir the water in the tank, which increases the turbulence of the water, promotes the effective transfer of heat, and improves the overall heat exchange performance. Attached Figure Description

[0026] Figure 1This is a cross-sectional structural schematic diagram of the cement manufacturing waste heat recovery equipment provided in the embodiments of this application;

[0027] Figure 2 This is a cross-sectional structural diagram of the water tank, insulation layer, flue gas duct, sealing ring, and filter assembly provided in the embodiments of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Water tank; 11. Inlet pipe; 12. Outlet pipe; 13. Water pump; 14. Insulation layer; 2. Flue gas duct; 21. Heat exchange fins; 22. Sealing ring; 3. First partition plate; 4. Second partition plate; 5. Turbulence assembly; 51. Drive motor; 52. Stirring blades; 6. Filter assembly; 61. Filter box; 62. Filter element. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0030] This application discloses a waste heat recovery device for cement manufacturing.

[0031] Reference Figure 1 and Figure 2 A waste heat recovery device for cement manufacturing includes a water tank 1, an inlet pipe 11, an outlet pipe 12, a flue gas pipe 2 disposed inside the water tank 1, a first partition plate 3, a second partition plate 4 disposed inside the water tank 1, and a turbulence-inducing component 5. The inlet pipe 11 and the outlet pipe 12 are fixedly disposed on opposite sides of the water tank 1. A water pump 13 is fixedly connected to the inlet pipe 11. One end of the first partition plate 3 is fixedly connected to the bottom of the water tank 1, and the other end has a gap between it and the top of the water tank 1. One end of the second partition plate 4 is fixedly connected to the top of the water tank 1, and the other end has a gap between it and the bottom of the water tank 1. The first partition plate 3 and the second partition plate 4 are spaced apart within the water tank 1. The flue gas pipe 2 is distributed in a serpentine pattern between the first partition plate 3 and the second partition plate 4. The turbulence-inducing component 5 is used to agitate the water in the water tank 1. An insulation layer 14 is fixedly disposed on the outer wall of the water tank 1.

[0032] The turbulence-disrupting assembly 5 includes a drive motor 51 fixedly mounted on the outer wall of the water tank 1 and stirring blades 52 disposed inside the water tank 1. The stirring blades 52 are fixedly connected to the drive shaft of the drive motor 51. There are multiple sets of turbulence-disrupting assemblies 5.

[0033] The inlet pipe 11 is fixedly installed at the bottom of the water tank 1, the outlet pipe 12 is fixedly installed at the top of the water tank 1, the first partition plate 3 is fixedly installed on the side of the water tank 1 near the inlet pipe 11, and the second partition plate 4 is fixedly installed on the side of the water tank 1 near the outlet pipe 12.

[0034] The function of the first partition plate 3 and the second partition plate 4 is to divide the water tank 1 into multiple zones, increasing the water flow path length and thus improving heat exchange efficiency. One end of the first partition plate 3 is connected to the bottom of the water tank 1, and the other end has a gap with the top of the water tank 1, allowing water to flow from the bottom to the top. Similarly, one end of the second partition plate 4 is connected to the top of the water tank 1, and the other end has a gap with the bottom of the water tank 1, allowing water to flow from the top to the bottom. This design ensures that the water flow is evenly distributed throughout the water tank 1, increasing the heat exchange area and efficiency.

[0035] The flow direction of the flue gas in flue gas duct 2 is opposite to the flow direction of the water in water tank 1. Multiple heat exchange fins 21 are fixedly installed on flue gas duct 2.

[0036] Both the inlet and outlet ends of the flue gas duct 2 pass through the water tank 1, and a sealing ring 22 is fixedly installed at the position where the flue gas duct 2 passes through the water tank 1.

[0037] A filter assembly 6 is provided at the air inlet end of the flue gas duct 2. The filter assembly 6 includes a filter box 61 and a filter element 62. The filter box 61 is fixedly connected to the flue gas duct 2, and the filter element 62 is fixedly installed in the filter box 61.

[0038] The implementation principle of a waste heat recovery device for cement manufacturing in this application embodiment is as follows: Through a reasonable structural design of the water tank 1 and an efficient arrangement of the flue gas duct 2, combined with the agitating effect of the turbulence-inducing component 5, the heat exchange efficiency is significantly improved. The presence of the first partition plate 3 and the second partition plate 4 extends the water flow path, increasing the heat exchange time and area. The serpentine design of the flue gas duct 2 and the addition of heat exchange fins 21 further improve the heat transfer efficiency. Simultaneously, the addition of the turbulence-inducing component 5 effectively eliminates local stagnation, making the water temperature distribution within the water tank 1 more uniform and reducing energy loss.

[0039] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A waste heat recovery device for cement manufacturing, characterized in that: The system includes a water tank (1), an inlet pipe (11), an outlet pipe (12), a flue gas pipe (2) disposed inside the water tank (1), a first partition plate (3), a second partition plate (4), and a turbulence-disrupting component (5) disposed inside the water tank (1). The inlet pipe (11) and the outlet pipe (12) are respectively disposed on opposite sides of the water tank (1). The inlet pipe (11) is connected to a water pump (13). One end of the first partition plate (3) is connected to the bottom of the water tank (1), and there is a gap between the other end and the top of the water tank (1). One end of the second partition plate (4) is connected to the top of the water tank (1), and there is a gap between the other end and the bottom of the water tank (1). The first partition plate (3) and the second partition plate (4) are distributed at intervals in the water tank (1). The flue gas pipe (2) is distributed in a serpentine manner between the first partition plate (3) and the second partition plate (4). The turbulence-disrupting component (5) is used to agitate the water in the water tank (1).

2. The waste heat recovery equipment for cement manufacturing according to claim 1, characterized in that: The turbulence assembly (5) includes a drive motor (51) mounted on the outer wall of the water tank (1) and a stirring blade (52) mounted inside the water tank (1). The stirring blade (52) is fixedly connected to the drive shaft of the drive motor (51).

3. The waste heat recovery equipment for cement manufacturing according to claim 2, characterized in that: The inlet pipe (11) is located at the bottom of the water tank (1), the outlet pipe (12) is located at the top of the water tank (1), the first partition plate (3) is located on the side of the water tank (1) near the inlet pipe (11), and the second partition plate (4) is located on the side of the water tank (1) near the outlet pipe (12).

4. The waste heat recovery equipment for cement manufacturing according to claim 3, characterized in that: The flow direction of the flue gas in the flue gas duct (2) is opposite to the flow direction of the water in the water tank (1).

5. The waste heat recovery equipment for cement manufacturing according to claim 4, characterized in that: The flue gas duct (2) is provided with multiple heat exchange fins (21).

6. The waste heat recovery equipment for cement manufacturing according to claim 5, characterized in that: The water tank (1) has an insulation layer (14) on its outer wall.

7. A waste heat recovery device for cement manufacturing according to claim 6, characterized in that: The inlet and outlet of the flue gas duct (2) both extend out of the water tank (1), and a sealing ring (22) is provided at the position where the flue gas duct (2) extends out of the water tank (1).

8. A cement manufacturing waste heat recovery device according to claim 7, characterized in that: The flue gas duct (2) is provided with a filter assembly (6) at the air inlet end. The filter assembly (6) includes a filter box (61) and a filter element (62). The filter box (61) is connected to the flue gas duct (2), and the filter element (62) is disposed in the filter box (61).

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