Energy-saving and emission-reducing utilization device for cement kiln head exhaust gas

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a cement kiln head exhaust waste gas energy-saving and emission-reducing utilization device which comprises a treatment tank, a snakelike heat exchange coil pipe is arranged in the treatment tank, a liquid outlet pipe and a liquid inlet pipe of the snakelike heat exchange coil pipe are located on the same side of the snakelike heat exchange coil pipe and correspond to each other up and down, and an ash removal assembly is further arranged in the treatment tank. The ash removal assembly comprises a vertical rotating shaft, a first cleaning brush and a second cleaning brush, the upper end of the vertical rotating shaft penetrates through the treatment tank and then is connected with a positive and negative rotation motor, and the first cleaning brush makes contact with the inner wall of the treatment tank; bristles II and bristles III of the cleaning brush II are respectively in contact with the outer walls of the outer side and the inner side of the snake-shaped heat exchange coil pipe. The heat exchanger is reasonable in structure and easy to use, waste gas exhausted by the cement kiln head can be subjected to efficient heat exchange operation, heat waste is avoided, and the heat energy utilization rate is increased; and a cleaning brush is used for cleaning ash on the outer wall of the snake-shaped heat exchange coil and the inner wall of the treatment tank, so that the heat exchange effect is prevented from being influenced.

Description

Technical Field

[0001] This utility model belongs to the field of waste gas treatment technology, specifically relating to an energy-saving and emission-reduction utilization device for waste gas discharged from cement kilns. Background Technology

[0002] In the cement industry, the exhaust gas generated by rotary kilns contains a large amount of heat energy. Direct emission of this heat prevents its recovery and utilization, causing severe thermal pollution to the surrounding environment and resulting in significant energy waste. (Patent No. CN 212720795) U's patent document discloses a device for saving coal and reducing flue gas emissions in a cement rotary kiln, including a rotary kiln mechanism, an insulation component, a preheating component, and a cleaning component. The insulation component includes a first heat collection device covering the outer wall of the rotary kiln body. The preheating component includes a preheating tank and a second heat collection device covering its outer wall. The cleaning component includes a cleaning tank containing cleaning fluid, and a second air pipe is provided between the cleaning tank and the second heat collection device. The first heat collection device covers the rotary kiln body to prevent heat loss and collects excess heat to preheat the raw materials. The exhaust gas discharged from the kiln head is passed into the heat dissipation pipe in the second heat collection device, and the heat carried by the exhaust gas is used to preheat the raw materials. The first and second heat collection devices are used to retain and reuse the heat of the rotary kiln. In this patent, the exhaust gas is cleaned by the cleaning fluid after passing through the heat dissipation pipe and then discharged, reducing the emission of flue gas in the original exhaust gas. However, some impurities inevitably exist in the exhaust gas, which will stick to the inner wall of the heat dissipation pipe after long-term use, making it difficult to clean and affecting the heat dissipation effect. Therefore, a device for energy conservation and emission reduction of waste gas from cement kiln heads is needed to solve the above-mentioned technical problems. Utility Model Content

[0003] To address the aforementioned deficiencies in existing technologies, this utility model provides an energy-saving and emission-reduction utilization device for cement kiln head exhaust gas, comprising a treatment tank. The bottom of the treatment tank is equipped with an air inlet pipe and a slag discharge pipe, and the top of the treatment tank is equipped with an exhaust pipe. Filter screens can be installed on both the air inlet pipe and the exhaust pipe. A serpentine heat exchange coil is installed inside the treatment tank. The upper end of the serpentine heat exchange coil is connected to a liquid outlet pipe, and the lower end of the serpentine heat exchange coil is connected to a liquid inlet pipe. The liquid outlet pipe and the liquid inlet pipe are located on the same side of the serpentine heat exchange coil and are vertically aligned.

[0004] The treatment tank is also equipped with a dust removal assembly, which includes a vertical rotating shaft and two cleaning brushes. The central axis of the vertical rotating shaft coincides with the central axis of the serpentine heat exchange coil. The upper end of the vertical rotating shaft passes through the treatment tank and is connected to a forward and reverse motor. The first cleaning brush is connected to the vertical rotating shaft through a connecting rod, and the first bristle of the first cleaning brush contacts the inner wall of the treatment tank. The second cleaning brush is connected to the vertical rotating shaft through a connecting rod, and the second cleaning brush is U-shaped. The two vertical rods of the second cleaning brush are respectively equipped with a second bristle and a third bristle. The second cleaning brush is mounted on the serpentine heat exchange coil, and the second bristle contacts the outer wall of the serpentine heat exchange coil, while the third bristle contacts the inner outer wall of the serpentine heat exchange coil.

[0005] Preferably, the first connecting rod includes an outer tube and an inner tube. The outer tube is fixedly connected to a vertical rotating shaft, and one end of the inner tube extends into the outer tube and is connected to the bottom of the outer tube through a compression spring. The second connecting rod has the same structure as the first connecting rod.

[0006] Preferably, the second bristle is fixed to the fixing plate, and the fixing plate has a matching groove on the vertical rod of the corresponding cleaning brush. One side of the fixing plate is always located in the groove and is connected to the inner wall of the groove through the second compression spring. This arrangement can apply a force towards the third bristle to the second bristle, preventing the second and third bristles from wearing down and failing to make effective contact with the outer wall of the serpentine heat exchange coil after long-term use.

[0007] Preferably, the lower end of the vertical rotating shaft extends into the slag discharge pipe, and a scraper is provided inside the slag discharge pipe. The scraper contacts the inner wall of the slag discharge pipe, and the scraper is connected to the vertical rotating shaft through a connecting rod three. The connecting rod three can have the same mechanism as the connecting rod one. This arrangement can prevent the slag discharge pipe from being blocked when there is a lot of dust.

[0008] This utility model also includes other components that enable the energy-saving and emission-reduction utilization device for cement kiln head exhaust gas to operate normally, such as the control components for the forward and reverse rotation motor, which are all conventional technical means in the field. In addition, the devices or components not limited in this utility model, such as brush one, brush two, brush three, serpentine heat exchange coil, etc., all adopt conventional technical means and conventional equipment in the field.

[0009] Working Principle: Exhaust gas from the cement kiln head enters the treatment tank through the inlet pipe. Cold water flows through the serpentine heat exchange coils, exchanging heat with the exhaust gas to effectively cool it. The heated water is discharged through the outlet pipe for other uses, avoiding heat waste and improving thermal energy utilization. The cooled exhaust gas is filtered through a filter screen and discharged through the exhaust pipe. The filtered dust falls to the bottom of the treatment tank and is discharged through the slag discharge port. During the above process or after heat exchange, a reversible motor drives the vertical shaft to periodically rotate in both directions. A cleaning brush cleans the outer wall of the serpentine heat exchange coils and the inner wall of the treatment tank, preventing dust from adhering to these surfaces and affecting the heat exchange effect.

[0010] The beneficial effects of this utility model are: reasonable structure, simple to use, and can perform efficient heat exchange operation on the exhaust gas discharged from the cement kiln head, effectively cooling the exhaust gas, while the heated water is discharged through the liquid outlet pipe for other uses, avoiding heat waste and improving heat energy utilization; the cleaning brush performs dust removal operation on the outer wall of the serpentine heat exchange coil and the inner wall of the treatment tank, preventing dust from sticking to the outer wall of the serpentine heat exchange coil and the inner wall of the treatment tank and affecting the heat exchange effect. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the structure of a cement kiln head exhaust gas energy-saving and emission-reduction utilization device according to an embodiment of the present utility model;

[0013] Figure 2 for Figure 1 A schematic diagram of the structure of the connecting pipe 1;

[0014] Figure 3 for Figure 1 Sectional view at point AA;

[0015] Figure 4 for Figure 1 A schematic diagram of the connection structure of the bristles of the medium-sized cleaning brush.

[0016] In the diagram: 1. Processing tank; 2. Air inlet pipe; 3. Exhaust pipe; 4. Serpentine heat exchange coil; 5. Liquid inlet pipe; 6. Liquid outlet pipe; 7. Connecting rod three; 8. Slag discharge pipe; 9. Scraper; 10. Cleaning brush one; 11. Connecting rod one; 12. Cleaning brush two; 13. Connecting rod two; 14. Vertical rotating shaft; 15. Forward and reverse motor; 16. Outer pipe; 17. Inner pipe; 18. Compression spring one; 19. Filter screen; 20. Brush bristles two; 21. Brush bristles three; 22. Groove; 23. Compression spring two; 24. Fixing plate. Detailed Implementation

[0017] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.

[0018] Example

[0019] like Figure 1-4 As shown, this utility model provides an energy-saving and emission-reduction utilization device for cement kiln head exhaust gas, including a treatment tank 1. The bottom of the treatment tank 1 is provided with an air inlet pipe 2 and a slag discharge pipe 8, and the top of the treatment tank 1 is provided with an exhaust pipe 3. The air inlet pipe and the exhaust pipe 3 are provided with a filter screen 19. The treatment tank 1 corresponding to the filter screen is provided with an openable and closable hand hole for easy cleaning and maintenance of the filter screen. The treatment tank 1 is provided with a serpentine heat exchange coil 4. The upper end of the serpentine heat exchange coil 4 is connected to a liquid outlet pipe 6, and the lower end of the serpentine heat exchange coil 4 is connected to a liquid inlet pipe 5. The liquid outlet pipe 6 and the liquid inlet pipe 5 are located on the same side of the serpentine heat exchange coil 4 and are vertically corresponding.

[0020] The treatment tank 1 is also equipped with a dust removal assembly, which includes a vertical rotating shaft 14, a first cleaning brush 10, and a second cleaning brush 12. The central axis of the vertical rotating shaft 14 coincides with the central axis of the serpentine heat exchange coil 4. The upper end of the vertical rotating shaft 14 passes through the treatment tank 1 and is connected to a forward and reverse rotating motor 15. The first cleaning brush 10 is connected to the vertical rotating shaft 14 through a first connecting rod 11, and the first bristle of the first cleaning brush 10 contacts the inner wall of the treatment tank 1. The second cleaning brush 12 is connected to the vertical rotating shaft 14 through a second connecting rod 13. The second cleaning brush 12 is U-shaped, and the two vertical rods of the cleaning brush are respectively equipped with a second brush 20 and a third brush 21. The second cleaning brush 12 is mounted on the serpentine heat exchange coil 4. The second brush 20 contacts the outer wall of the serpentine heat exchange coil 4, and the third brush 21 contacts the inner outer wall of the serpentine heat exchange coil 4.

[0021] The connecting rod 11 includes an outer tube 16 and an inner tube 17. The outer tube 16 is fixedly connected to the vertical rotating shaft 14. One end of the inner tube 17 extends into the outer tube 16 and is connected to the bottom of the outer tube 16 through a compression spring 18. The connecting rod 2 13 has the same structure as the connecting rod 11.

[0022] The second bristle 20 is fixed to the fixing plate 24. The vertical rod of the cleaning brush corresponding to the fixing plate 24 is provided with a matching groove 22. One side of the fixing plate 24 is always located in the groove 22 and is connected to the inner wall of the groove 22 through the second compression spring 23. This setting can apply a force to the second bristle 20 towards the third bristle 21, so as to avoid the second bristle 20 and the third bristle 21 being worn and unable to make effective contact with the outer wall of the serpentine heat exchange coil after long-term use.

[0023] The lower end of the vertical rotating shaft 14 extends into the slag discharge pipe 8. A scraper 9 is installed inside the slag discharge pipe 8, and the scraper 9 contacts the inner wall of the slag discharge pipe 8. The scraper 9 is connected to the vertical rotating shaft 14 via a connecting rod 3 7. The connecting rod 3 7 can have the same mechanism as connecting rod 1 11. This design prevents the slag discharge pipe 8 from clogging when there is excessive dust.

[0024] The exhaust gas from the cement kiln head enters the treatment tank through the inlet pipe. Cold water is circulated through the serpentine heat exchange coils to exchange heat with the exhaust gas, effectively cooling it. The heated water is discharged through the outlet pipe for other uses, avoiding heat waste and improving thermal energy utilization. The cooled exhaust gas is filtered through a filter screen and discharged through the exhaust pipe. The filtered dust falls to the bottom of the treatment tank and is discharged through the slag discharge port. During the above process or after the heat exchange is completed, a reversible motor drives the vertical shaft to periodically rotate in both directions. A cleaning brush cleans the outer wall of the serpentine heat exchange coils and the inner wall of the treatment tank, preventing dust from adhering to the outer wall of the serpentine heat exchange coils and the inner wall of the treatment tank, which would affect the heat exchange effect.

[0025] The embodiments of this utility model have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cement kiln head exhaust gas energy saving and emission reduction utilization device, comprising a treatment tank, the bottom of the treatment tank is provided with an air inlet pipe and a slag discharge pipe, the top of the treatment tank is provided with an exhaust pipe, and a filter screen is arranged on the exhaust pipe. The processing tank is internally provided with a serpentine heat exchange coil pipe, the upper end of the serpentine heat exchange coil pipe is connected with a liquid outlet pipe, the lower end of the serpentine heat exchange coil pipe is connected with a liquid inlet pipe, the liquid outlet pipe and the liquid inlet pipe are located on the same side of the serpentine heat exchange coil pipe and correspond to each other in up and down directions, The processing tank is also internally provided with a dust cleaning assembly, the dust cleaning assembly comprises a vertical rotating shaft and a cleaning brush one and a cleaning brush two, the central axis of the vertical rotating shaft coincides with the central axis of the serpentine heat exchange coil pipe, the upper end of the vertical rotating shaft penetrates through the processing tank and is connected with a forward and reverse motor, the cleaning brush one is connected with the vertical rotating shaft through a connecting rod one, the bristles one of the cleaning brush one is in contact with the inner wall of the processing tank, the cleaning brush two is connected with the vertical rotating shaft through a connecting rod two, the cleaning brush two is U-shaped, two vertical rods of the cleaning brush two are respectively provided with bristles two and bristles three, the cleaning brush two is arranged on the serpentine heat exchange coil pipe, the bristles two are in contact with the outer wall of the serpentine heat exchange coil pipe, and the bristles three are in contact with the inner wall of the serpentine heat exchange coil pipe.

2. The device according to claim 1, characterized in that: The connecting rod one comprises an outer pipe and an inner pipe, the outer pipe is fixedly connected with the vertical rotating shaft, one end of the inner pipe extends into the outer pipe and is connected with the bottom of the outer pipe through a compression spring one, and the connecting rod two is the same in structure as the connecting rod one.

3. The device according to claim 1, characterized in that: The bristles two are fixed on a fixed plate, the fixed plate is provided with a matching groove on the vertical rod of the corresponding cleaning brush, one side of the fixed plate is always located in the groove and is connected with the inner wall of the groove through a compression spring two.

4. The device according to claim 1, characterized in that: The lower end of the vertical rotating shaft extends into a slag discharge pipe, the slag discharge pipe is internally provided with a scraping rod, the scraping rod is in contact with the inner wall of the slag discharge pipe, and the scraping rod is connected with the vertical rotating shaft through a connecting rod three.

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