Waste heat recovery device in cement production process

Abstract

The utility model discloses a waste heat recovery device in a cement production process, which comprises a cooling box, the top of the cooling box is fixedly connected with a filter element, the top of the filter element is communicated with a first communicating pipe, the middle of the first communicating pipe is communicated with a fan, one end, far away from the cooling box, of the first communicating pipe is communicated with a heat exchanger, and the other end of the first communicating pipe is communicated with a second communicating pipe. A hot air flow inlet is fixedly connected to the position, close to one side, of the top of the heat exchanger, an air flow outlet is fixedly connected to the side, away from the hot air flow inlet, of the top of the heat exchanger, and a water inlet and a hot water outlet are fixedly connected to the side, away from the cooling box, of the heat exchanger; the side, away from the heat exchanger, of the hot water outlet communicates with a second communicating pipe. Through the arrangement of the preheating barrel and the spiral through pipe, waste heat in hot air can be fully utilized, energy waste is reduced, energy consumption cost is reduced, the requirement for fuel can be lowered, the fuel utilization rate is increased, and production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery in cement production, in particular to a waste heat recovery device in a cement production process. Background Art

[0002] In the cement production process, the burning of cement clinker is a vital link. Generally, the raw materials are crushed, preheated, and then calcined at high temperature to make a chemical reaction occur to form cement clinker. The calcined cement clinker needs to be cooled by cooling equipment to reduce the temperature, stabilize the chemical reaction, and facilitate subsequent storage and transportation.

[0003] At present, cement clinker needs to be cooled after firing. In this process, the heat released by the cooling of the clinker can also be converted into energy for use. If it is not converted, it will cause waste of heat energy. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that the heat released by the cooling of clinker will cause heat energy waste if it is not reused for a second time, and proposes a waste heat recovery device in the cement production process.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A waste heat recovery device in a cement production process comprises a cooling box, a filter element is fixedly connected to the top of the cooling box, a first connecting pipe is connected to the top of the filter element, a fan is connected to the middle of the first connecting pipe, a heat exchanger is connected to the end of the first connecting pipe away from the cooling box, a hot air flow inlet is fixedly connected to the top of the heat exchanger near one side, an air flow outlet is fixedly connected to the side of the top of the heat exchanger away from the hot air flow inlet, a water inlet and a hot water outlet are fixedly connected to the side of the heat exchanger away from the cooling box, a second connecting pipe is connected to the side of the hot water outlet away from the heat exchanger, and a preheating barrel is fixedly connected to the side of the second connecting pipe away from the heat exchanger.

[0007] Preferably, the bottom of the preheating barrel is fixedly connected to a base, the top of the preheating barrel is provided with a top connecting cover, the bottom of the top connecting cover is fixedly connected to a first stirring rod and a second stirring rod, the top of the first stirring rod fits against the inner side of the storage block close to the outer side, the top of the second stirring rod fits against the inner side of the storage block close to the inner side, the bottom of the first stirring rod fits against the inner side of the storage block close to the inner side, the bottom of the second stirring rod fits against the inner side of the storage block close to the outer side, and a snap-in groove is provided in the middle of the top connecting cover.

[0008] Preferably, a storage block is movably sleeved on the inner side of the preheating barrel, and the storage block is made of copper. A spiral through pipe is provided between each of the storage blocks, and the bottom of the spiral through pipe is connected to an outlet pipe at one end away from the second connecting pipe for secondary utilization of hot water. The spiral through pipe is located on the inner side of the preheating barrel, and the spiral through pipe is connected to the second connecting pipe.

[0009] Preferably, the first connecting pipe is connected to the heat exchanger through a hot air flow inlet, and the first stirring rod and the second stirring rod are both located on the inner side of the storage block.

[0010] Preferably, a control gear is movably engaged with the inner side of the engaging groove, and the bottom of the control gear is connected to the preheating barrel by a bearing near the edge.

[0011] Preferably, a servo motor is transmission-connected to the bottom of the control gear near the center, and the servo motor is fixedly connected to the preheating barrel.

[0012] Preferably, the first stirring rod and the second stirring rod are inverted with each other, and the first stirring rod and the second stirring rod are equidistantly distributed in an array at the bottom of the top connecting cover.

[0013] Compared with the prior art, the utility model provides a waste heat recovery device in the cement production process, which has the following beneficial effects:

[0014] 1. The waste heat recovery device in the cement production process is equipped with a preheating barrel and a spiral pipe. After the conversion by the heat exchanger, hot water heated by thermal energy can enter the spiral pipe to preheat the raw material, which is conducive to making full use of the waste heat in the hot air, reducing energy waste, reducing energy consumption costs, reducing the demand for fuel, improving fuel utilization, and reducing production costs.

[0015] 2. The waste heat recovery device in the cement production process is provided with a second stirring rod and a storage block, which is conducive to increasing the contact area between hot water and raw materials, and can speed up the speed of heat conduction, so that the raw materials absorb heat faster. This helps to improve the preheating efficiency and reduce energy consumption. At the same time, the heat can be transferred to the raw materials in a shorter time, thereby shortening the time required for the entire preheating process, which helps to improve production efficiency and reduce production cycles. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a waste heat recovery device in a cement production process proposed by the utility model;

[0017] Figure 2 The utility model is a schematic diagram of a preheating barrel of a waste heat recovery device in a cement production process.

[0018] Figure 3 This is a schematic diagram of a storage block of a waste heat recovery device in a cement production process proposed by the utility model.

[0019] Figure 4 The utility model is a schematic diagram of a spiral through pipe of a waste heat recovery device in a cement production process.

[0020] Figure 5 This is a schematic diagram of a first stirring rod of a waste heat recovery device in a cement production process proposed by the utility model.

[0021] In the figure: 1. cooling box; 2. filter element; 3. fan; 4. first connecting pipe; 5. hot air flow inlet; 6. heat exchanger; 7. air flow outlet; 8. water inlet; 9. hot water outlet; 10. second connecting pipe; 11. preheating barrel; 12. top connecting cover; 13. snap-in groove; 14. first stirring rod; 15. second stirring rod; 16. base; 17. storage block; 18. spiral through pipe; 19. control gear; 20. servo motor. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] Reference Figure 1-5A waste heat recovery device in a cement production process comprises a cooling box 1, a filter element 2 is fixedly connected to the top of the cooling box 1, a first connecting pipe 4 is connected to the top of the filter element 2, a fan 3 is connected to the middle of the first connecting pipe 4, a heat exchanger 6 is connected to the end of the first connecting pipe 4 away from the cooling box 1, a hot air flow inlet 5 is fixedly connected to the top of the heat exchanger 6 near one side, an air flow outlet 7 is fixedly connected to the side of the top of the heat exchanger 6 away from the hot air flow inlet 5, a water inlet 8 and a hot water outlet 9 are fixedly connected to the side of the heat exchanger 6 away from the cooling box 1, a second connecting pipe 10 is connected to the side of the hot water outlet 9 away from the heat exchanger 6, a preheating barrel 11 is fixedly connected to the side of the second connecting pipe 10 away from the heat exchanger 6, and the preheating barrel 11 is provided with a recessed opening near the bottom of the inner side of the preheating barrel 11 The groove is used to adapt to the spiral through pipe 18. The top of the spiral through pipe 18 is provided with a groove for adapting to the storage block 17. In this way, the raw material can be conveniently preheated. The storage block 17 is movably sleeved on the inner side of the preheating barrel 11. The storage block 17 is provided with a ring-shaped design of the storage block 17 after the raw material is ground, so that the contact area between the raw material and the spiral through pipe 18 is increased, which is beneficial to improving the preheating effect. Spiral through pipes 18 are provided between each storage block 17. The spiral through pipe 18 is provided with a first stirring rod 14 and a second stirring rod 15, so that heat is more evenly transferred to the raw material, avoiding the problem of local temperature being too high or too low, ensuring that the raw material is heated evenly, and helping to improve product quality. The spiral through pipe 18 is located on the inner side of the preheating barrel 11, and the spiral through pipe 18 is connected to the second connecting pipe 10.

[0025] Reference Figure 2-5 The bottom of the preheating barrel 11 is fixedly connected with a base 16, and the top of the preheating barrel 11 is provided with a top connecting cover 12. The bottom of the top connecting cover 12 is fixedly connected with a first stirring rod 14 and a second stirring rod 15. The first stirring rod 14 and the second stirring rod 15 can stir the raw material in the storage block 17 to transfer heat to the raw material more evenly. The first connecting pipe 4 is connected with the heat exchanger 6 through the hot air flow inlet 5. The first stirring rod 14 and the second stirring rod 15 are both located on the inner side of the storage block 17. A clamping groove 13 is provided in the middle of the top connecting cover 12. A control gear 19 is movably clamped on the inner side of the clamping groove 13. A servo motor 20 is transmission-connected to the bottom of the control gear 19 near the center. The servo motor 20 is fixedly connected to the preheating barrel 11. The bottom of the control gear 19 near the edge is connected to the preheating barrel 11 by a bearing. The first stirring rod 14 and the second stirring rod 15 are in an inverted state, and the first stirring rod 14 and the second stirring rod 15 are evenly distributed in an array at the bottom of the top connecting cover 12.

[0026] In the utility model, when in use, the user can place the clinker that needs to be cooled inside the cooling box 1 for cooling, and then use the fan 3 to transport the high-temperature airflow emitted when the clinker is cooled, the filter element 2 can block the solid particles in the airflow, and the high-temperature airflow enters the heat exchanger 6 through the hot air flow inlet 5, and the high-temperature airflow is used to heat the water transported in the water inlet 8. After the heating is completed, it is transported to the spiral through pipe 18 through the hot water outlet 9 and the second connecting pipe 10, and then the raw material inside the storage block 17 is preheated through the spiral through pipe 18. The servo motor 20 drives the control gear 19, and the control gear 19 drives the top connecting cover 12. The top connecting cover 12 drives the first stirring rod 14 and the second stirring rod 15 to rotate, and the raw material in the storage block 17 is stirred by the first stirring rod 14 and the second stirring rod 15 so that it can be evenly heated to complete the preheating of the raw material.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waste heat recovery device in a cement production process, comprising a cooling box (1), characterized in that: The top of the cooling box (1) is fixedly connected to a filter element (2), the top of the filter element (2) is connected to a first connecting pipe (4), the middle of the first connecting pipe (4) is connected to a fan (3), the end of the first connecting pipe (4) away from the cooling box (1) is connected to a heat exchanger (6), the top of the heat exchanger (6) is fixedly connected to a hot air flow inlet (5) at a position close to one side, the top of the heat exchanger (6) is fixedly connected to an air flow outlet (7) on a side away from the hot air flow inlet (5), the side of the heat exchanger (6) away from the cooling box (1) is fixedly connected to a water inlet (8) and a hot water outlet (9), the side of the hot water outlet (9) away from the heat exchanger (6) is connected to a second connecting pipe (10), and the side of the second connecting pipe (10) away from the heat exchanger (6) is fixedly connected to a preheating barrel (11).

2. The waste heat recovery device in a cement production process according to claim 1, characterized in that: The bottom of the preheating barrel (11) is fixedly connected to a base (16), the top of the preheating barrel (11) is provided with a top connecting cover (12), the bottom of the top connecting cover (12) is fixedly connected to a first stirring rod (14) and a second stirring rod (15), and a clamping groove (13) is provided in the middle of the top connecting cover (12).

3. The waste heat recovery device in cement production process according to claim 1, characterized in that: The inner side of the preheating barrel (11) is movably sleeved with a storage block (17), and between each of the storage blocks (17) there are spiral tubes (18), the spiral tubes (18) are located inside the preheating barrel (11), and the spiral tubes (18) are connected to the second connecting tube (10).

4. The waste heat recovery device in a cement production process according to claim 2, characterized in that: The first connecting pipe (4) is connected to the heat exchanger (6) through the hot air flow inlet (5), and the first stirring rod (14) and the second stirring rod (15) are both located on the inner side of the storage block (17).

5. The waste heat recovery device in cement production process according to claim 2, characterized in that: A control gear (19) is movably engaged with the inner side of the engaging groove (13), and a bottom portion of the control gear (19) close to the edge is bearing-connected to the preheating barrel (11).

6. The waste heat recovery device in cement production process according to claim 5, characterized in that: A servo motor (20) is transmission-connected to a position near the center of the bottom of the control gear (19), and the servo motor (20) is fixedly connected to the preheating barrel (11).

7. The waste heat recovery device in cement production process according to claim 2, characterized in that: The first stirring rod (14) and the second stirring rod (15) are in an inverted state, and the first stirring rod (14) and the second stirring rod (15) are evenly distributed in an array at the bottom of the top connecting cover (12).

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