Pyrolysis desorption fly ash water cooling device

Abstract

The utility model provides a pyrolysis desorption fly ash water cooling device which comprises a first cooling area and a second cooling area, the first cooling area is provided with an outer straight pipe, the outer straight pipe is provided with a groove, and a spiral groove matched with the groove is fixedly installed at the position of the outer straight pipe; the spiral groove is divided into two layers, one layer is a spiral feeding groove, and a dust sweeping assembly is arranged in the spiral feeding groove; the other layer is a spiral water inlet groove which is connected with the inner straight pipe through a water inlet pipe; the inner straight pipe is provided with a nozzle; the second cooling area is provided with a feeding pipe and a cooling screw, the feeding pipe is provided with a water cooling jacket, and the feeding pipe is obliquely arranged; and an ash shoveling assembly on the water-cooling screw is fixed on the blade through a connecting piece. Fly ash is sequentially cooled through the first cooling area and the second cooling area, the temperature of discharged fly ash can be low, and regeneration of dioxin is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste incineration fly ash treatment, and particularly relates to a water-cooling device for hot-decomposition desorption of fly ash. Background Art

[0002] With the popularization of incineration technology, the secondary pollution problem of fly ash has become a bottleneck restricting the development of waste incineration technology. Dioxins in fly ash account for about 70% of the dioxin emissions in the incineration process. Dioxins are carcinogenic and teratogenic, and the current low-temperature thermal desorption technology is used to thermally decompose and desorb dioxins in fly ash.

[0003] The low-temperature thermal desorption technology usually thermally decomposes and desorbs dioxins from fly ash in a rotary kiln. The treated fly ash is cooled and discharged through a water-cooled spiral, and the waste gas in the kiln is treated and discharged through a tail gas mechanism.

[0004] However, according to the properties of dioxins, at low temperatures, dioxins are extremely likely to be regenerated from scratch through the reaction of macromolecular carbon in fly ash with organic or inorganic chlorine in the presence of transition metals in fly ash at low temperatures.

[0005] Because the temperature in the kiln is relatively high, the water-cooled spiral can only transfer the fly ash over a distance, resulting in a low temperature of the fly ash in contact with the cooling water at the bottom, and the fly ash piled up on the upper part cannot be in contact with the cooling water, so it cannot be cooled well. This causes the temperature of the fly ash at the discharge port to be too high, which is prone to safety hazards and may also lead to the re-synthesis of dioxins, affecting the treatment effect of thermal decomposition desorption. Summary of the Invention

[0006] In view of the above problems, the utility model provides a water-cooling device for hot-decomposition desorption of fly ash. The device cools the fly ash successively through a first cooling zone and a second cooling zone, which can reduce the temperature of the discharged fly ash, avoid the re-synthesis of dioxins from scratch, and solve the above technical problems.

[0007] The utility model provides a water-cooling device for hot-decomposition desorption of fly ash, which includes a first cooling zone and a second cooling zone.

[0008] The first cooling zone is composed of an outer straight pipe, a spiral groove, and an inner straight pipe, and the first cooling zone is divided into a first cooling section, a second cooling section, and a third cooling section.

[0009] Preferably, there are grooves on the inner wall of the outer straight pipe, and there are protrusions on the side of the spiral groove close to the outer straight pipe. The size of the protrusions matches that of the grooves to realize the fixed installation of the spiral groove.

[0010] The spiral groove is composed of a spiral feed groove and a spiral water inlet groove. The spiral feed groove is installed above the spiral water inlet groove and is provided with a dust sweeping component inside.

[0011] Preferably, the top of the spiral feed groove is connected to the discharge port of the thermal decomposition desorption device.

[0012] Preferably, the top of the spiral feed chute is open, and there is an inclined baffle on the side to prevent fly ash from escaping.

[0013] The ash-sweeping assembly consists of a roller, a connecting rod, a cross bar, a support rod, a brush plate, and bristles. The roller is in the groove on the side wall of the spiral feed chute, and the brush plate and bristles are located in the spiral feed chute. The connecting rod connects the roller and the cross bar, the cross bar is fixedly connected to the support rod, the bottom of the support rod is connected to the brush plate, and the bottom of the brush plate is equipped with bristles.

[0014] Preferably, the movement of the ash-sweeping assembly is controlled by a PLC.

[0015] Preferably, the connecting rod is connected to the cross bar through a hinge, enabling the brush plate to be removed from the spiral feed chute.

[0016] Preferably, the support rod and the brush plate are detachably installed.

[0017] The spiral water inlet chute is divided into a first water inlet chute, a second water inlet chute, and a third water inlet chute. Among them, the first water inlet chute is connected to the first water inlet pipe, the second water inlet chute is connected to the second water inlet pipe, and the third water inlet chute is connected to the third water inlet pipe. And the first, second, and third water inlet chutes are connected to the first, second, and third cooling water inlets on the inner straight pipe.

[0018] Preferably, the water inlet in the second and third water inlet chutes is fresh cooling water.

[0019] Preferably, the water inlet in the first water inlet chute is the recycled cooling water for the second and third cooling stages.

[0020] The inner straight pipe is divided into a first inner straight pipe, a second inner straight pipe, and a third inner straight pipe.

[0021] Preferably, the three straight pipes are sealed from each other.

[0022] Preferably, nozzles are installed at the bottom of the three straight pipes to spray the cooling water introduced into the corresponding straight pipes onto the straight cylinder wall to further cool the first cooling zone.

[0023] Preferably, the cooling water introduced into the second and third straight cylinders is introduced into the first water inlet chute through a lift pump.

[0024] The second cooling zone consists of a feed pipe and a cooling spiral. The feed end of the feed pipe is connected to the discharge end of the first cooling zone. The spiral is located inside the feed pipe. The bottom end of the feed pipe is also equipped with feet to maintain the stability of the feed pipe. The discharge port of the feed pipe is on one side of the spiral motor.

[0025] Preferably, a jacket is also provided inside the feed pipe, and the jacket is filled with cooling water to further cool the fly ash.

[0026] Preferably, the feeding pipe is inclined to control the discharging speed, further control the residence time of fly ash in the second cooling zone, and ensure that the temperature of the outlet fly ash is below room temperature.

[0027] The cooling screw is composed of a motor, a spiral blade, and a dust shoveling assembly. The motor is connected to the spiral blade and installed outside the feeding pipe, and the dust shoveling assembly is installed on the spiral blade.

[0028] Preferably, the screw is a shaftless screw, which can increase the space inside the feeding pipe and has a long service life.

[0029] Preferably, one end of the dust shoveling assembly is provided with a thread, which is used in cooperation with the internal thread of the spiral blade to realize the detachable fixation of the dust shoveling assembly on the spiral blade.

[0030] Preferably, the shovel blade at the other end of the dust shoveling assembly is set in an S shape, which can fit the U-shaped feeding pipe and is easier to shovel fly ash;

[0031] Preferably, the shovel blade is open at one end along the spiral movement and provided with a baffle at the other end, which can ensure that the shoveled ash falls after moving along the spiral for a period of time, fully contacts the cooling water in the jacket, and is cooled more sufficiently.

[0032] The beneficial effects of the present utility model are as follows:

[0033] 1. By setting two-stage water-cooling cooling in the first cooling zone and the second cooling zone, the fly ash at the discharge port can be cooled below room temperature, which will not cause safety hazards and also avoid the re-formation of dioxins in the fly ash;

[0034] 2. The fly ash falls into the spiral feeding trough and exchanges heat with the cooling water in the lower spiral feeding trough through the partition board. The heat exchange area is large and the water-cooling effect is good;

[0035] 3. The fly ash slowly rotates and slides down through the spiral trough, ensuring the residence time of the fly ash in the first cooling zone and increasing the water-cooling effect;

[0036] 4. The second and third water inlet troughs are both fresh cooling water, which can ensure that the discharge temperature of the fly ash at the discharge end of the first cooling zone is within a lower range. The first water inlet trough is the recycled water for cooling the second and third sections, saving energy and reducing consumption;

[0037] 5. The inner straight pipe is equipped with a spray head, which can further cool the first cooling zone and cool the fly ash to a lower temperature;

[0038] 6. The PLC can control the ash sweeping assembly to clean the fly ash in the spiral feeding trough, making the ash cleaning more convenient;

[0039] 7. The dust shoveling assembly can make the fly ash in the feeding pipe fully contact the pipe wall, the water cooling is more complete, and the fly ash at the discharge port is cooled below room temperature. Description of the Drawings

[0040] Figure 1 This is a structural schematic diagram of the present utility model.

[0041] Figure 2 This is a structural schematic diagram of the first cooling zone of the present utility model.

[0042] Figure 3 This is a structural schematic diagram of the ash-sweeping assembly of the present utility model.

[0043] Figure 4 This is a structural schematic diagram of the ash-shoveling assembly of the present utility model.

[0044] In the figure: 1. Outer straight pipe; 11. Spiral groove; 12. Inner straight pipe; 111. Spiral feed groove; 112. Spiral water inlet groove; 121. First inner straight pipe; 122. Second inner straight pipe; 123. Third inner straight pipe; 124. Nozzle; 2. Ash-sweeping assembly; 21. Baffle; 22. Groove; 23. Roller; 24. Connecting rod; 25. Hinge; 26. Cross bar; 27. Support rod; 28. Brush plate; 29. Brush bristles; 3. First water inlet pipe; 31. First cooling water inlet; 4. Second water inlet pipe; 41. Second cooling water inlet; 5. Third water inlet pipe; 51. Third cooling water inlet; 32. First water inlet groove; 42. Second water inlet groove; 52. Third water inlet groove; 6. Feeding pipe; 7. Water-cooled spiral; 71. Water-cooled jacket; 61. Discharge port; 8. Support leg; 9. Motor; 72. Spiral blade; 73. Ash-shoveling assembly; 721. Inner thread of spiral blade; 722. Threaded rod; 731. Ash-shoveling piece; 732. Flap. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0046] As Figure 1 shown, a thermal desorption fly ash water-cooling device of the present utility model includes a first cooling zone and a second cooling zone.

[0047] The design of the first cooling zone consists of an outer straight pipe 1, a spiral groove 11, and an inner straight pipe 12. These three components work together to form an efficient cooling environment. The first cooling zone is further subdivided into three cooling segments, namely the first cooling segment, the second cooling segment, and the third cooling segment. Each cooling segment is optimized for different cooling requirements. The first cooling zone is provided with an outer straight pipe, which is arranged at the end and is in an L shape as a whole. There is a dust-scraping component on the cooling spiral, which is fixed to the blade through a connecting piece.

[0048] The spiral groove 11 consists of a spiral feeding groove 111 and a spiral water inlet groove 112. The spiral feeding groove 111 is installed above the spiral water inlet groove 112 and is internally equipped with a dust-scraping component 2. The design of the dust-scraping component 2 is very ingenious and consists of multiple parts, including a roller 23, a connecting rod 24, a cross bar 26, a support rod 27, a brush plate 28, and brush bristles 29. The roller 23 is embedded in the groove 22 on the side wall of the spiral feeding groove 111 to ensure that the dust-scraping component 2 can move smoothly. The brush plate 28 and the brush bristles 29 are located in the spiral feeding groove 111 and are responsible for cleaning the flying ash to prevent ash accumulation from affecting the operating efficiency of the device.

[0049] The connecting rod 24 connects the roller 23 to the cross bar 26. The cross bar 26 is fixedly connected to the support rod 27. The bottom of the support rod 27 is connected to the brush plate 28, and the bottom of the brush plate 28 is equipped with brush bristles 29. These brush bristles can effectively clean the flying ash and keep the spiral groove clean.

[0050] The spiral water inlet groove 112 is further subdivided into three parts: the first water inlet groove 32, the second water inlet groove 42, and the third water inlet groove 52. Each water inlet groove is connected to a corresponding water inlet pipe, namely the first water inlet pipe 3, the second water inlet pipe 4, and the third water inlet pipe 5. In addition, each water inlet groove is connected to the cooling water inlet on the inner straight pipe 12 to ensure that the cooling water can accurately flow into the inner straight pipe to further cool the first cooling zone.

[0051] The second cooling zone consists of a feeding pipe 6 and a cooling spiral 7. The feeding end of the feeding pipe 6 is connected to the discharging end of the first cooling zone to ensure that the flying ash can smoothly transfer from the first cooling zone to the second cooling zone. The cooling spiral 7 is located inside the feeding pipe 6 and consists of a motor 9, spiral blades 72, and a dust-scraping component 73. The motor 9 is connected to the spiral blades 72 and is installed outside the feeding pipe 6, while the dust-scraping component 73 is installed on the spiral blades 72 and is responsible for shoveling up the flying ash and making it fully contact with the water-cooled jacket 71 to further improve the cooling effect.

[0052] The bottom end of the feeding pipe 6 is installed with a support leg 8, which not only maintains the stability of the feeding pipe 6 but also ensures the structural stability of the entire device. The discharging port 61 of the feeding pipe 6 is located on one side of the spiral motor 9, facilitating the smooth discharge of the flying ash after passing through the second cooling zone.

[0053] The design of the spiral feed chute 111 takes into account seamless docking with the thermal desorption device. Its top is directly connected to the discharge port of the device, ensuring that fly ash can smoothly transfer from the thermal desorption device to the feed chute. To improve the efficiency of fly ash transportation and prevent fly ash from escaping, inclined baffles 21 are specially provided on both side walls at the opening of the spiral feed chute 111. These baffles can not only effectively block fly ash but also guide fly ash to move along a predetermined path.

[0054] Inside the spiral feed chute 111, a dust sweeping assembly 2 is also ingeniously arranged. This assembly consists of multiple precision components, including roller wheels 23, connecting rods 24, hinge parts 25, cross bars 26, support rods 27, and brush plates 28. The roller wheels 23 are embedded in the grooves 22 on the side of the spiral feed chute 111 close to the inner straight pipe 12, ensuring that the dust sweeping assembly 2 can move smoothly along the spiral chute. One end of the connecting rod 24 is fixed to the roller wheel 23, and the other end is connected to the cross bar 26 through the hinge part 25, forming a flexible connection mechanism.

[0055] The support rods 27 are fixedly installed at the bottom of the cross bar 26, and the support rods 27 are detachably installed with the brush plates 28, facilitating maintenance and replacement. Special bristles 29 are installed inside the brush plates 28, and these bristles can efficiently clean the dust and residues adhering to the spiral chute wall, keeping the spiral chute clean, thereby improving the operating efficiency of the entire system.

[0056] The design of the hinge part 25 allows the dust sweeping assembly 2 to be conveniently removed from the spiral feed chute 111, facilitating cleaning and maintenance. This design not only improves the maintainability of the equipment but also reduces the downtime caused by equipment failures, ensuring the continuity and stability of production. Through these carefully designed components and structures, the entire spiral chute system can operate efficiently and stably, meeting the high standards required in industrial production.

[0057] As Figure 1 and Figure 2 shown, the design of the spiral water inlet chute 112 is ingeniously divided into three independent parts: the first water inlet chute 32, the second water inlet chute 42, and the third water inlet chute 52. This layered design allows the system to precisely distribute cooling water according to different cooling requirements.

[0058] The design of the first water inlet chute 32 particularly takes into account water resource conservation and reuse. One end of it is connected to the first water inlet pipe 3, ensuring a stable supply of cooling water. The other end is connected to the first inner straight pipe 121 through the first cooling water inlet 31, forming an efficient cooling water circulation system. In this system, the first inner straight pipe 121 is equipped with spray nozzles 124, and these spray nozzles can evenly spray cooling water on the wall of the inner straight pipe 12, effectively cooling the first cooling zone.

[0059] The designs of the second water inlet tank 42 and the third water inlet tank 52 pay more attention to the introduction of fresh cooling water to ensure that the fly ash temperature at the discharge end of the first cooling zone can be maintained within a lower range. One end of the second water inlet tank 42 is connected to the second water inlet pipe 4, and the other end is connected to the second inner straight pipe 122 through the second cooling water inlet 41. Similarly, one end of the third water inlet tank 52 is connected to the third water inlet pipe 5, and the other end is connected to the third inner straight pipe 123 through the third cooling water inlet 51. The designs of these two water inlet tanks ensure the continuous supply of fresh cooling water, thus improving the cooling efficiency of the entire system.

[0060] It should be noted that the cooling water used in the first water inlet tank 32 is recycled water after being treated in the second and third cooling stages. This design not only saves water resources but also reduces the dependence on fresh water resources through recycling. At the same time, the fresh cooling water introduced into the second and third water inlet tanks 42 and 52 provides the necessary temperature control for the first cooling zone, ensuring that the fly ash temperature at the discharge end can reach the expected lower level.

[0061] As Figure 1 and Figure 4 shown, the design of the second cooling zone includes a feeding pipe 6 and a water-cooled spiral 7. These two components work together to further cool the fly ash. The design of the feeding pipe 6 is crucial. It is equipped with a water-cooled jacket 71 which contains cooling water. By directly contacting the fly ash, effective water-cooling is carried out. To ensure that the fly ash has sufficient residence time in the second cooling zone to enhance the water-cooling effect, the feeding pipe 6 is designed to be inclined.

[0062] The other end of the feeding pipe 6 is provided with a discharge port 61, which is the passage for the fly ash to leave the cooling zone and enter the next treatment stage. In addition, the feeding pipe 6 is also equipped with support feet 8. These support feet not only provide structural stability but also help to maintain the inclined angle of the feeding pipe to optimize the flow and cooling process of the fly ash.

[0063] The water-cooled screw 7 is another core component in the second cooling zone. Driven by the motor 9, it realizes the transportation and mixing of fly ash through the spiral blade 72. The spiral blade 72 is designed with internal threads 721, which match the threaded rod 722 on the ash shoveling component 73, enabling the ash shoveling component 73 to be fixed on the spiral blade 72 through threaded connection. This design allows the ash shoveling component 73 to move as the spiral blade rotates, effectively shoveling up the fly ash at the bottom of the feeding pipe 6. The end of the ash shoveling component 73 is specially designed with an S-shaped shovel blade, which helps to collect and lift the fly ash more effectively. As the spiral blade moves, the shovel blade shovels up the fly ash and, through its ingenious design, avoids the immediate falling of the fly ash. At the other end of the shovel blade 731, a baffle 732 is specially provided. This design ensures that the fly ash will fall on the pipe wall only after moving with the spiral for a certain period of time. In this way, the fly ash can have more sufficient contact with the cooling water in the water-cooled jacket 71, achieving a more in-depth cooling effect. The cooling screw adopts a shaftless screw, and the spiral blade is equipped with a detachable ash shoveling component. The shovel blade of the ash shoveling component is S-shaped, with an opening at one end and a baffle at the other end.

[0064] Through this carefully designed mechanism, the second cooling zone can not only avoid the accumulation of fly ash at the upper part but also ensure the contact between the fly ash and the pipe wall, thus avoiding the phenomenon of incomplete cooling and improving the efficiency and effect of the entire cooling process.

[0065] The working principle of the utility model is as follows:

[0066] Water-cooled cooling in the first cooling zone

[0067] The fly ash first falls into the feeding spiral groove 11 from the thermal desorption device, which marks the start of the cooling process. The first water inlet groove 32, the second water inlet groove 42, and the third water inlet groove 52 successively introduce the cooling return water in the second and third cooling stages and fresh cooling water, ensuring that the cooling requirements in different stages are met. The fly ash is affected by gravity in the spiral feeding groove 111 and slowly slides along the spiral trajectory. This design prolongs the residence time of the fly ash in the first cooling zone, providing conditions for maximizing the water-cooling effect. At the same time, the cooling water flows from the first water tank 32, the second water tank 42, and the third water tank 52 into the corresponding first inner straight pipe 121, second inner straight pipe 122, and third inner straight pipe 123, and the cooling water is evenly sprayed on the inner straight pipe 12 through the nozzle 124, further enhancing the cooling effect in the first cooling zone.

[0068] The PLC (Programmable Logic Controller) is used to control the sliding of the ash sweeping component 2 in the spiral feeding groove, ensuring that the brush bristles 29 can efficiently sweep the accumulated ash, avoiding the blockage of the spiral feeding groove 111, and guaranteeing the smoothness of the entire cooling process and the continuity of subsequent operations.

[0069] Water-cooled cooling in the second cooling zone

[0070] The fly ash after being processed in the first cooling zone continues to enter the second cooling zone, where the water-cooled spiral 7 plays a key role. The movement of the water-cooled spiral 7 not only drives the fly ash forward, but also the ash-shoveling component 73 on the spiral blade 72 can shovel up the fly ash, increasing the chance of the fly ash coming into contact with the cooling water. The shoveled fly ash falls after moving with the water-cooled spiral 7 for a period of time and comes into full contact with the cooling water in the water-cooled jacket 71. This process significantly increases the water-cooling effect. Finally, through this series of cooling measures, the temperature of the fly ash at the discharge port 61 is effectively reduced to below room temperature, achieving the expected cooling target.

[0071] In summary: The utility model effectively ensures that the temperature of the fly ash at the discharge port is reduced to below room temperature through the two-stage water-cooling processes of the carefully designed first cooling zone and second cooling zone. This design not only eliminates the potential safety hazards that may be caused by high-temperature fly ash, but also prevents the re-generation of harmful substances such as dioxins in the fly ash, ensuring environmental safety and human health.

[0072] After the fly ash falls into the spiral feed trough, heat exchange is carried out with the cooling water in the lower spiral feed trough through a partition plate. Due to the design of the partition plate increasing the heat exchange area, the water-cooling effect is more significant, thus improving the efficiency of the entire cooling process.

[0073] The fly ash moves in the spiral trough by means of slow rotation and sliding. This design prolongs the residence time of the fly ash in the first cooling zone. A longer residence time means that the fly ash has more sufficient contact with the cooling water, thereby enhancing the water-cooling effect.

[0074] Fresh cooling water is introduced into both the second water inlet trough and the third water inlet trough. This strategy ensures that the temperature of the fly ash at the discharge end of the first cooling zone is maintained within a lower range. At the same time, the first water inlet trough uses the recycled water after the second and third stages of cooling. This method of recycling water resources not only saves costs but also reduces energy consumption.

[0075] The spray nozzles installed in the inner straight pipe can evenly spray the cooling water. This design further cools the first cooling zone. The spraying action of the spray nozzles makes the contact between the fly ash and the cooling water more sufficient, effectively promoting the reduction of the fly ash temperature.

[0076] The ash-sweeping component is driven by a PLC. The connection between the connecting rod and the cross bar is hinged, and the brush plate and the support plate are detachable. Through the intelligent control of the PLC, the ash-sweeping component can automatically clean the fly ash in the spiral feed trough. This automated ash-cleaning method not only improves the cleaning efficiency but also reduces the need for manual cleaning, making the ash-cleaning process more convenient and fast.

[0077] The design of the ash shoveling component enables the fly ash in the feeding pipe to come into full contact with the pipe wall, and this contact maximizes the efficiency of water cooling. With the movement of the screw, the contact time between the fly ash and the cooling water increases, ensuring that the temperature of the fly ash at the discharge port can be reduced below room temperature, achieving the goal of efficient cooling.

[0078] The protection scope of the present utility model is not limited to the specific embodiments described in the text, but is determined by the appended claims and equivalents recognized according to the patent law. This means that all technical solutions that are the same as or equivalent to the present utility model in principle and spirit are within the protection scope of the present utility model. Therefore, the innovation and practicality of the present utility model are not limited to the current displayed form, but also include all possible and reasonable derivations and extensions.

Claims

1. A thermal desorption fly ash water cooling device, comprising a first cooling zone and a second cooling zone, characterized in that The first cooling zone is provided with an outer straight pipe, which is arranged at the end and is in an L shape as a whole; The spiral groove is installed at the outer straight pipe and is divided into a spiral feed groove and a spiral water inlet groove; A dust sweeping component is arranged in the spiral feed groove, the spiral water inlet groove is connected to the inner straight pipe, and the inner straight pipe is provided with a nozzle; The second cooling zone is provided with a feeding pipe and a cooling screw; There is a dust shoveling component on the cooling screw, which is fixed to the blade through a connecting piece.

2. The thermal desorption fly ash water cooling device according to claim 1, characterized in that, One side of the spiral groove close to the outer straight pipe has a protrusion, and the size of the protrusion matches the groove. The spiral groove is connected to the outer straight pipe through the groove, and the spiral feed groove is installed above the spiral water inlet groove.

3. The thermal desorption fly ash water cooling device according to claim 2, characterized in that, The spiral water inlet groove is divided into several, and each water inlet groove is connected to the corresponding inner straight pipe through a water inlet pipe, and the inner straight pipes are closed to each other.

4. The thermal desorption fly ash water cooling device according to claim 1, characterized in that, The dust sweeping component includes a roller and a brush plate. The roller is installed in the groove on the side wall of the spiral feed groove. The roller and the cross bar are connected to the cross bar through a connecting rod. The cross bar is fixedly connected to the support rod. The bottom of the support rod is connected to the brush plate, and the bottom of the brush plate is equipped with bristles.

5. The thermal desorption fly ash water cooling device according to claim 4, characterized in that The dust sweeping component is driven by a PLC. The connection between the connecting rod and the cross bar is hinged, and the brush plate and the support plate are detachable.

6. The thermal desorption fly ash water cooling device according to claim 1, characterized in that, The feeding end of the feeding pipe is connected to the discharging end of the first cooling zone. The cooling screw is located in the feeding pipe. The inside of the feeding pipe is provided with a jacket, and the inside of the jacket is filled with cooling water. The bottom end of the feeding pipe is installed with a support leg. The feeding pipe is placed obliquely, and the discharging port of the feeding pipe is located on one side of the spiral motor.

7. The thermal desorption fly ash water cooling device according to claim 1, characterized in that, The motor of the cooling screw is installed outside the feeding pipeline, and the dust shoveling component is installed on the spiral blade.

8. The thermal desorption fly ash water cooling device according to claim 6 or 7, characterized in that, The cooling screw adopts a shaftless screw. There is a detachable dust shoveling component on the spiral blade. The shovel blade of the dust shoveling component is S-shaped, with one end open and the other end provided with a retaining piece.

Images