A calcination kiln high-temperature tail gas waste heat recycling device

Abstract

The utility model belongs to tail gas recycling technical field especially for a kind of calcining kiln high-temperature tail gas waste heat recycling device, including base and the water storage tank being fixed at its top, tail gas coil and stirring mechanism are installed in the inside of the water storage tank.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas recovery and utilization technology, specifically a device for recovering and utilizing waste heat from high-temperature exhaust gas in calcining kilns. Background Technology

[0002] Calcination kilns are thermal equipment whose core function is to induce physical or chemical changes in materials through high-temperature heating (such as dehydration, degassing, oxidation, reduction, and crystal transformation). They are widely used in metallurgy, chemical industry, building materials, and environmental protection. During operation, calcination kilns generate a large amount of high-temperature exhaust gas. To avoid wasting this exhaust gas, recovery devices are typically used to recycle it for heating liquid water. However, because the high-temperature exhaust gas flows rapidly during heating, its thermal energy cannot be fully utilized, resulting in a slow heating rate for the liquid water. Furthermore, the high-temperature exhaust gas generated by calcination kilns contains a large amount of dust and particulate matter, and direct emission would pollute the air. Therefore, we propose a high-temperature exhaust gas waste heat recovery and utilization device for calcination kilns to solve the above problems. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a high-temperature exhaust gas waste heat recovery and utilization device for calcining kilns, which solves the problems mentioned in the background technology.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A waste heat recovery and utilization device for high-temperature tail gas of calcining kiln includes a base and a water storage tank fixed on its top. The water storage tank is equipped with a tail gas coil and a stirring mechanism. The inlet and outlet ends of the tail gas coil both penetrate the water storage tank and extend to its outside. A filter assembly for treating the high-temperature tail gas after utilization is installed on the top of the base.

[0008] The stirring mechanism includes a stirring paddle 1 and three stirring paddles 2 rotatably connected inside the water storage tank via bearings. A driving gear is fixed to the surface of the stirring paddle 1, and a driven gear is fixed to the surface of each of the stirring paddles 2. The driven gears are all meshed with the driving gear.

[0009] Furthermore, the filter assembly includes a filter box fixed to the top of the base, the outlet end of the exhaust coil is connected and fixed to the inlet of the filter box, the filter box is detachably equipped with a filter screen and an activated carbon honeycomb plate, the filter box is equipped with a compression mechanism for compressing the collected smoke particles into blocks, and the filter box is detachably equipped with a cover plate and a side plate.

[0010] Furthermore, the extrusion mechanism includes two extrusion plates disposed inside the filter box. An elastic cloth is fixed to one side wall of each extrusion plate, and the other end of each elastic cloth is fixedly connected to the inner wall of the filter box. A drive mechanism for driving the two extrusion plates to move synchronously in opposite directions is provided at the bottom of the filter box.

[0011] Furthermore, the driving mechanism includes a drive shaft rotatably connected to the bottom of the filter box via a bearing. A drive gear is fixed on the surface of the drive shaft. Two toothed frames are slidably limited at the bottom of the filter box. Two movable rods are fixed on one side wall of each toothed frame. The other end of each movable rod slides through the filter box and extends into its interior, and is fixedly connected to a corresponding extrusion plate.

[0012] Furthermore, four guide rails are fixed to the bottom of the filter box, and two guide plates that are compatible with the guide rails are fixed to the toothed frame.

[0013] Furthermore, a vibration motor is fixed to the bottom of each of the extrusion plates.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a device for recovering and utilizing waste heat from high-temperature exhaust gas in calcining kilns, which has the following beneficial effects:

[0016] This invention, by installing a tail gas coil and a stirring mechanism inside the water storage tank, extends the flow time of the high-temperature flue gas within the tail gas coil, thus fully utilizing its thermal energy to heat the water inside the tank. The stirring mechanism further accelerates the heating of the water. A filter assembly purifies the high-temperature tail gas after waste heat utilization, preventing direct emission and air pollution. Furthermore, a compression mechanism inside the filter assembly compresses loose dust particles collected inside the filter box into blocks, reducing dust generation during subsequent dust particle cleaning. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the stirring mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the filter assembly structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the extrusion mechanism of this utility model;

[0021] Figure 5This is a schematic diagram of the side plate structure of this utility model.

[0022] In the diagram: 1. Base; 2. Water tank; 3. Exhaust gas coil; 4. Stirring mechanism; 41. Stirring paddle one; 42. Stirring paddle two; 43. Drive gear; 44. Driven gear; 5. Filter assembly; 51. Filter box; 52. Filter screen; 53. Activated carbon honeycomb panel; 54. Extrusion mechanism; 541. Extrusion plate; 542. Elastic cloth; 543. Drive mechanism; 5431. Drive shaft; 5432. Drive gear; 5433. Gear frame; 5434. Moving rod; 5435. Guide rail; 5436. Guide plate; 544. Vibration motor; 55. Cover plate; 56. Side plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example

[0025] like Figure 1 , Figure 2 and Figure 3 As shown in the figure, an embodiment of the present invention proposes a high-temperature exhaust gas waste heat recovery and utilization device for calcining kilns, including a base 1 and a water storage tank 2 fixed on its top. A water inlet pipe is installed on the top of the water storage tank 2, and a drain pipe is fixedly connected to its side wall, which facilitates the intake of water into the tank and the discharge of heated water. An exhaust gas coil 3 and a stirring mechanism 4 are installed inside the water storage tank 2. The inlet and outlet ends of the exhaust gas coil 3 both penetrate the water storage tank 2 and extend to its outside. The exhaust gas coil 3 and the water storage tank 2 are sealed to prevent leakage. A filter assembly 5 for treating and utilizing the high-temperature exhaust gas is installed on the top of the base 1.

[0026] The stirring mechanism 4 includes a first stirring paddle 41 and three second stirring paddles 42 rotatably connected inside the water storage tank 2 via bearings. A motor is fixed on the top of the water storage tank 2, and the output end of the motor is fixedly connected to the top of the first stirring paddle 41. A driving gear 43 is fixed on the surface of the first stirring paddle 41, and a driven gear 44 is fixed on the surface of each of the second stirring paddles 42. The driven gears 44 are all meshed with the driving gear 43.

[0027] The working principle and usage process of this utility model: When using this high-temperature exhaust gas waste heat recovery and utilization device for calcining kiln, the inlet end of the exhaust gas coil 3 can be connected and fixed to the high-temperature exhaust gas discharge pipe of the calcining kiln. At this time, the high-temperature exhaust gas generated during the operation of the calcining kiln will flow inside the exhaust gas coil 3. During the flow of the high-temperature exhaust gas, heat exchange can be performed on the water inside the water storage tank 2, thereby heating the water. During the heating process, the starting motor can drive the stirring paddle 41 to rotate. After the stirring paddle 41 rotates, it will drive the drive gear 43 to rotate. Since the three driven gears 44 are all meshed with the drive gear 43, when the stirring paddle 41 rotates, it will simultaneously drive the three stirring paddles 42 to rotate, thereby accelerating the heating speed of the water inside the water storage tank 2. During the heating process, the high-temperature exhaust gas after preheating and utilization will be treated by the filter component 5 before being discharged, thereby avoiding pollution to the air after direct discharge.

[0028] like Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, the filter assembly 5 includes a filter box 51 fixed to the top of the base 1. The outlet end of the exhaust coil 3 is connected and fixed to the inlet of the filter box 51. A filter screen 52 and an activated carbon honeycomb plate 53 are detachably installed inside the filter box 51. An extrusion mechanism 54 is provided inside the filter box 51 to compress collected smoke particles into blocks. A cover plate 55 and a side plate 56 are detachably installed on the filter box 51. Sealing rings adapted to their shapes are fixed on both the cover plate 55 and the side plate 56 to prevent smoke leakage. In use, when the high-temperature exhaust gas enters the filter box 51, it passes through the filter screen 52... The filter 51 filters out particulate matter and other impurities. As the exhaust gas rises, it is further purified by the activated carbon honeycomb plate 53. Finally, the purified exhaust gas is discharged through the exhaust pipe at the top of the filter box 51. When the collected dust particles fall into the filter box 51, they are compressed into blocks by the compression mechanism 54 to reduce dust during subsequent cleaning. In addition, the cover plate 55 at the top of the filter box 51 facilitates the disassembly, cleaning, or replacement of the filter screen 52 and the activated carbon honeycomb plate 53, while the side plate 56 facilitates the cleaning of the collected dust particles.

[0029] like Figure 3 and Figure 4As shown, in some embodiments, the extrusion mechanism 54 includes two extrusion plates 541 disposed inside the filter box 51. U-shaped sealing rings can be fixed to the surface of each extrusion plate 541, so that when it moves, it can effectively push the dust particles collected inside the filter box 51 to move. A vibration motor 544 is fixed to the bottom of each extrusion plate 541, which can cause the extrusion plate 541 to vibrate, so that the dust particles falling onto its surface fall between the vertical surfaces of the two extrusion plates 541, thereby facilitating the subsequent extrusion of the dust particles into blocks. A spring is fixed to one side wall of each extrusion plate 541. The other end of the elastic cloth 542 is fixedly connected to the inner wall of the filter box 51. The bottom of the filter box 51 is provided with a drive mechanism 543 for driving the two extrusion plates 541 to move synchronously in opposite directions. In use, the two extrusion plates 541 can be operated to move synchronously in opposite directions by the drive mechanism 543 to extrude the collected dust particles. At this time, the dust particles can be extruded into blocks. The elastic cloth 542 is provided to cover the cavity created after the extrusion plates 541 move, so as to prevent the dust particles from falling into the cavity formed by the extrusion plates 541 and the filter box 51.

[0030] like Figure 3 and Figure 4 As shown, in some embodiments, the drive mechanism 543 includes a drive shaft 5431 rotatably connected to the bottom of the filter box 51 via bearings. A drive gear 5432 is fixed to the surface of the drive shaft 5431. Two toothed frames 5433 are slidably limited at the bottom of the filter box 51. Four guide rails 5435 are fixed to the bottom of the filter box 51. Two guide plates 5436 adapted to the guide rails 5435 are fixed on each toothed frame 5433, which can provide auxiliary guidance and support for the toothed frame 5433, thereby making it more stable during movement. Two moving rods 5434 are fixed to one side wall of each toothed frame 5433. The moving rods 5434 and the filter box 51 are sealed to prevent smoke and dust from leaking out. The other end of the moving rod 5434 slides through the filter box 51 and extends into its interior, and is fixedly connected to the corresponding extrusion plate 541. In use, a motor is fixed on the base 1, and the output end of the motor is fixedly connected to the bottom end of the drive shaft 5431. When it is necessary to extrude particulate matter, the motor can be started to drive the drive shaft 5431 to rotate. After the drive shaft 5431 rotates, it will drive the drive gear 5432 on its surface to rotate. At this time, it can drive the two toothed frames 5433 to move synchronously in opposite directions. After the toothed frames 5433 move, they will drive the moving rod 5434 fixed on one side wall to move. When the moving rod 5434 moves, it can drive the two extrusion plates 541 to move closer to each other and extrude particulate matter.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for recovering and utilizing waste heat from high-temperature exhaust gas in a calcining kiln, characterized in that: Includes a base (1) and a water tank (2) fixed on top of it. The water tank (2) is equipped with an exhaust gas coil (3) and a stirring mechanism (4). The inlet and outlet ends of the exhaust gas coil (3) pass through the water tank (2) and extend to its outside. The top of the base (1) is equipped with a filter assembly (5) for treating the high-temperature exhaust gas after utilization. The stirring mechanism (4) includes a stirring paddle (41) and three stirring paddles (42) rotatably connected inside the water storage tank (2) via bearings. The surface of the stirring paddle (41) is fixed with a driving gear (43), and the surface of each of the stirring paddles (42) is fixed with a driven gear (44). The driven gears (44) are all meshed with the driving gear (43).

2. The high-temperature tail gas waste heat recovery and utilization device of the calcining kiln according to claim 1, characterized in that: The filter assembly (5) includes a filter box (51) fixed on the top of the base (1). The outlet end of the exhaust coil (3) is connected and fixed to the inlet of the filter box (51). The filter box (51) is detachably equipped with a filter screen (52) and an activated carbon honeycomb plate (53). The filter box (51) is equipped with a compression mechanism (54) for compressing the collected smoke particles into blocks. The filter box (51) is detachably equipped with a cover plate (55) and a side plate (56).

3. The high-temperature tail gas waste heat recovery and utilization device of the calcining kiln according to claim 2, characterized in that: The extrusion mechanism (54) includes two extrusion plates (541) disposed inside the filter box (51). An elastic cloth (542) is fixed to one side wall of each extrusion plate (541), and the other end of each elastic cloth (542) is fixedly connected to the inner wall of the filter box (51). A drive mechanism (543) for driving the two extrusion plates (541) to move synchronously in opposite directions is provided at the bottom of the filter box (51).

4. The high-temperature tail gas waste heat recovery and utilization device of the calcining kiln according to claim 3, characterized in that: The drive mechanism (543) includes a drive shaft (5431) rotatably connected to the bottom of the filter box (51) via a bearing. A drive gear (5432) is fixed on the surface of the drive shaft (5431). Two toothed frames (5433) are slidably limited at the bottom of the filter box (51). Two moving rods (5434) are fixed on one side wall of each toothed frame (5433). The other end of each moving rod (5434) slides through the filter box (51) and extends into its interior, and is fixedly connected to the corresponding extrusion plate (541) respectively.

5. The high-temperature tail gas waste heat recovery and utilization device of the calcining kiln according to claim 4, characterized in that: The bottom of the filter box (51) is fixed with four guide rails (5435), and two guide plates (5436) that are compatible with the guide rails (5435) are fixed on the toothed frame (5433).

6. The high-temperature tail gas waste heat recovery and utilization device of the calcining kiln according to claim 3, characterized in that: Vibration motors (544) are fixed to the bottom of each of the extrusion plates (541).

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