A recovery device and method for recovering heat from incinerator slag

Abstract

The application discloses a kind of recovery device and method of recovering heat on incinerator slag, and the present application relates to the technical field of recovering heat on slag into tap water, heat insulation tank is welded with right oblique downwardly arranged inclined plate, inclined plate is divided into upper airtight cavity and lower airtight cavity by heat insulation tank, multiple heat exchange plates are welded in the direction of its inclined plane in inclined plate, and each heat exchange plate is downwardly penetrated through the bottom wall of heat insulation tank;Right side wall of heat insulation tank is provided with liquid feeding valve and liquid outlet valve communicated with lower airtight cavity;Heat insulation tank is provided with lifting oil cylinder fixed on ground directly below, lifting plate is fixed on the acting end of lifting oil cylinder piston rod, and multiple floating plates corresponding to heat exchange plate are fixed on the upper of inclined plane, the upper end of each floating plate is inserted into through slot from bottom to top, and is slidably connected with through slot;Stirring mechanism for stirring tap water is arranged between heat insulation tank and lifting plate.The beneficial effects of the present application are: greatly improve the heat recovery efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of recovering heat from slag into tap water, and in particular to a device and method for recovering heat from incinerator slag. Background Technology

[0002] Waste incinerators are used to burn municipal solid waste. The heat generated during the incineration process is used to generate electricity, while ash is continuously discharged from the ash discharge port of the waste incinerator. Since the ash itself contains heat, workers connect a recovery device to the ash discharge port to recover the heat from the ash.

[0003] The structure of the recycling device is as follows: Figure 1 As shown, it includes a heat-conducting cylinder 26 and a spacer 27 welded to the outer wall of the heat-conducting cylinder 26. A sealed cavity is formed between the spacer 27 and the heat-conducting cylinder 26. A pipe 4 and a shut-off valve 5 are sequentially fixed on the top of the heat-conducting cylinder 26. The top port of the shut-off valve 5 is connected to the ash discharge port 6 of the waste incinerator 1. A liquid addition valve 12 and a liquid discharge valve 13 communicating with the sealed cavity are provided on the spacer 27. A ash discharge trough 28 is opened at the bottom of the heat-conducting cylinder 26. A cover plate 29 is fixed to the bottom of the ash discharge trough 28 by screws.

[0004] The method for recovering heat from slag using this recovery device is as follows:

[0005] S1. Open the liquid filling valve 12 and inject a certain amount of tap water into the sealed cavity through the liquid filling valve 12. After injection, close the liquid filling valve 12.

[0006] S2. Open the shut-off valve 5. The slag in the waste incinerator 1 flows sequentially through the slag discharge port 6, shut-off valve 5, and pipe 4, finally entering the heat conduction cylinder 26. After a period of discharge, the worker closes the shut-off valve 5. At this time, a certain amount of slag accumulates in the heat conduction cylinder 26. The slag transfers its heat to the inner wall of the heat conduction cylinder 26, which then transfers the heat to the tap water, heating the tap water. After a period of time, all the heat from the slag can be recovered into the tap water, thus ultimately achieving the recovery of heat from the slag. After the recovery is complete, open the cover plate 29 to discharge the slag in the heat conduction cylinder 26. After discharge, close the cover plate 29 again to prepare for the next heat recovery from the slag.

[0007] S3. Open the outlet valve 13. The heated tap water is discharged from the outlet valve 13 and can be used by workers for daily life.

[0008] However, although this recovery device can recover heat from the slag, it still has the following technical shortcomings:

[0009] I. A large amount of slag accumulates inside the heat-conducting cylinder 26, resulting in a small contact area between the heat on the slag and the tap water. This causes a long waiting time before all the heat on the slag can be recovered into the tap water, thus reducing the efficiency of heat recovery.

[0010] II. The tap water also does not flow within the sealed chamber, further reducing the contact area between the heat from the slag and the tap water, thus decreasing the efficiency of heat recovery. Therefore, there is an urgent need for a recovery device and method that can significantly improve the efficiency of heat recovery. Summary of the Invention

[0011] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device and method for recovering heat from incinerator slag that greatly improves the efficiency of heat recovery.

[0012] The objective of this invention is achieved through the following technical solution: a heat recovery device for recovering heat from incinerator slag, comprising a gantry frame installed on the right side of a waste incinerator and supported on the ground; a heat insulation tank welded inside the crossbeam of the gantry frame; a pipe and a shut-off valve sequentially fixed to the top of the heat insulation tank; the top port of the shut-off valve connected to the slag discharge port of the waste incinerator; an inclined plate welded to the right and downwards inside the heat insulation tank, dividing the heat insulation tank into an upper sealed chamber and a lower sealed chamber; multiple heat exchange plates welded at intervals along the inclined surface inside the inclined plate, each heat exchange plate penetrating downwards through the bottom wall of the heat insulation tank; and a through groove arranged along the length of each heat exchange plate; a liquid addition valve and a liquid outlet valve communicating with the lower sealed chamber are provided on the right side wall of the heat insulation tank.

[0013] A lifting cylinder fixed to the ground is installed directly below the heat insulation tank. A lifting plate is fixed to the working end of the piston rod of the lifting cylinder. A forward-inclined slope is provided on the front end face of the lifting plate. Multiple floating plates corresponding to the heat exchange plate are fixed on the slope. The upper end of each floating plate extends from bottom to top into the through groove and slides with the through groove.

[0014] A stirring mechanism for agitating tap water is provided between the heat insulation tank and the lifting plate. The stirring mechanism includes a driven shaft rotatably mounted on the left side wall of the heat insulation tank, a rack welded to the bottom surface of the lifting plate, and a mounting plate welded to the bottom surface of the heat insulation tank. An impeller located in the lower sealed cavity is fixed on the right end of the driven shaft, and a driven gear located outside the heat insulation tank is fixed on the left end of the driven shaft. The mounting plate is located to the left of the rack, and a drive shaft is rotatably mounted inside the mounting plate. A drive gear is fixed on the right end of the drive shaft and meshes with the rack. A drive gear is fixed on the left end of the drive shaft and meshes with the driven gear.

[0015] A rectangular groove is provided inside the crossbeam of the gantry frame, and the heat insulation tank is welded into the rectangular groove.

[0016] The pipe is located directly above the high point of the inclined plate.

[0017] The horizontal spacing between any two adjacent heat exchange plates is equal, and the upper end of each heat exchange plate is welded to the inside of the inclined plate, while the lower end of each heat exchange plate is welded to the bottom wall of the insulated tank.

[0018] The heat insulation tank has a rectangular cross-section.

[0019] A bearing housing is fixed on the right side wall of the mounting plate, and the drive shaft is rotatably mounted in the bearing housing.

[0020] A dynamic seal is provided between the driven shaft and the side wall of the heat insulation tank.

[0021] The recovery device also includes a controller, which is electrically connected to the liquid filling valve, liquid discharging valve, shut-off valve and lifting cylinder via signal lines.

[0022] A method for recovering heat from incinerator slag, comprising the following steps:

[0023] S1. The worker controls the liquid filling valve to start, and injects a certain amount of tap water into the closed chamber through the liquid filling valve. After a certain amount is injected, the liquid filling valve is closed. At this time, the tap water will submerge the impeller and each heat exchange plate.

[0024] S2. The worker controls the start of the shut-off valve. The slag in the waste incinerator passes through the slag discharge port and the shut-off valve in sequence, and finally falls onto the inclined plate. Under its own gravity, the slag slides down the slope of the inclined plate. The slag enters the through slots in each heat exchange plate from the top port, and then the slag is blocked by the floating plate. After the slag has been discharged for a period of time, the worker controls the shut-off valve to close. At this time, the heat on the slag is transferred to the heat exchange plate, and the heat exchange plate transfers the heat to the tap water to gradually heat the tap water.

[0025] S3. Control the piston rod of the lifting cylinder to reciprocate and extend. When the piston rod extends upward, it drives the lifting plate to move upward. The lifting plate drives each floating plate to move upward. The floating plates lift the slag in the channel upward. At the same time, the lifting plate also drives the rack to move upward. The rack drives the drive gear to rotate. The drive gear drives the drive shaft to rotate. The drive shaft drives the drive gear to rotate. The drive gear drives the driven gear to rotate. The driven gear drives the driven shaft to rotate. The driven shaft drives the impeller to rotate. The impeller agitates the tap water.

[0026] When the piston rod retracts downwards, it drives the lifting plate downwards, which in turn drives the floating plates downwards. The slag in the channel moves downwards under its own weight. At the same time, the lifting plate also drives the rack downwards, which in turn drives the drive gear to reverse, thereby driving the impeller to reverse. As the piston rod of the lifting cylinder reciprocates, the slag in each heat exchange plate moves up and down in the channel, while the impeller rotates in both directions to agitate the tap water.

[0027] S4. After the lifting cylinder has been working for a period of time, the controller controls the lifting cylinder to close. At this time, all the heat on the slag can be recovered into the tap water, thus finally realizing the recovery of heat on the slag.

[0028] S5. After the recycling is completed, the worker controls the piston rod of the lifting cylinder to retract downwards. When the piston rod is fully retracted, each floating plate exits from the through groove in the heat exchange plate. The slag in the through groove falls onto the slope of the lifting plate, and then the slag falls down the slope to the ground, thus discharging the used slag onto the ground. After the slag in each heat exchange plate is discharged, the worker controls the piston rod of the lifting cylinder to extend upwards, so that the floating plate re-enters the through groove of the heat exchange plate to prepare for the second recycling of heat from the slag.

[0029] S6. The worker opens the outlet valve, and the heated tap water is discharged from the outlet valve. The discharged hot tap water can be used for the worker's daily life.

[0030] The present invention has the following advantages: it greatly improves the efficiency of heat recovery. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of an existing recycling device;

[0032] Figure 2 This is a schematic diagram of the structure of the present invention;

[0033] Figure 3 for Figure 2 Main section diagram;

[0034] Figure 4 for Figure 3 A schematic diagram of direction A;

[0035] Figure 5 for Figure 3 Schematic diagram of the BB cross section;

[0036] Figure 6 This is a schematic diagram of the heat exchange plate.

[0037] Figure 7 This is a schematic diagram showing the connection between the lifting plate and the floating plate;

[0038] Figure 8 This is a schematic diagram of the floating plate structure;

[0039] Figure 9 A schematic diagram showing the piston rod of the lifting cylinder fully retracted;

[0040] In the diagram, 1-waste incinerator, 2-gantry frame, 3-insulation tank, 4-pipeline, 5-stop valve, 6-slag discharge port, 7-sloping plate, 8-upper sealed chamber, 9-lower sealed chamber, 10-heat exchange plate, 11-through groove, 12-liquid filling valve, 13-liquid outlet valve, 14-lifting cylinder, 15-lifting plate, 16-sloping surface, 17-floating plate, 18-driven shaft, 19-rack, 20-mounting plate, 21-impeller, 22-driven gear, 23-drive shaft, 24-drive gear, 25-drive gear, 26-heat conduction cylinder, 27-spacer sleeve, 28-slag discharge trough, 29-cover plate. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description:

[0042] like Figures 2-8 As shown, a heat recovery device for recovering heat from incinerator slag includes a gantry frame 2 located on the right side of a waste incinerator 1 and supported on the ground. A heat-insulating tank 3 is welded into the crossbeam of the gantry frame 2. A rectangular groove is formed within the crossbeam of the gantry frame 2. The heat-insulating tank 3 has a rectangular cross-section and is welded into the rectangular groove. A pipe 4 and a shut-off valve 5 are sequentially fixed to the top of the heat-insulating tank 3. The top port of the shut-off valve 5 is connected to the slag discharge port 6 of the waste incinerator 1. An inclined plate 7, tilted downwards to the right, is welded into the heat-insulating tank 3. The pipe 4 is positioned directly above the high position of the inclined plate 7. Plate 7 divides the heat insulation tank 3 into an upper sealed chamber 8 and a lower sealed chamber 9. Multiple heat exchange plates 10 are welded at intervals along the inclined surface of the inclined plate 7. Each heat exchange plate 10 penetrates the bottom wall of the heat insulation tank 3 downwards. Each heat exchange plate 10 has a through groove 11 arranged along its length. A liquid filling valve 12 and a liquid discharging valve 13 communicating with the lower sealed chamber 9 are provided on the right side wall of the heat insulation tank 3. The horizontal distance between any two adjacent heat exchange plates 10 is equal. The upper end of each heat exchange plate 10 is welded to the inclined plate 7, and the lower end of each heat exchange plate 10 is welded to the bottom wall of the heat insulation tank 3.

[0043] A lifting cylinder 14 fixed to the ground is provided directly below the heat insulation tank 3. A lifting plate 15 is fixed on the working end of the piston rod of the lifting cylinder 14. A forward inclined slope 16 is provided on the front end face of the lifting plate 15. Multiple floating plates 17 corresponding to the heat exchange plate 10 are fixed on the slope 16. The upper end of each floating plate 17 extends from bottom to top into the through groove 11 and slides with the through groove 11.

[0044] A stirring mechanism for agitating tap water is provided between the heat insulation tank 3 and the lifting plate 15. The stirring mechanism includes a driven shaft 18 rotatably mounted on the left side wall of the heat insulation tank 3, a rack 19 welded to the bottom surface of the lifting plate 15, and a mounting plate 20 welded to the bottom surface of the heat insulation tank 3. A dynamic seal is provided between the driven shaft 18 and the side wall of the heat insulation tank 3. An impeller 21 located in the lower sealed cavity 9 is fixed on the right end of the driven shaft 18, and a driven gear 22 located outside the heat insulation tank 3 is fixed on the left end of the driven shaft 18. The mounting plate 20 is located to the left of the rack 19. A drive shaft 23 is rotatably mounted inside the mounting plate 20. A bearing seat is fixed on the right side wall of the mounting plate 20. The drive shaft 23 is rotatably mounted inside the bearing seat. A drive gear 24 is fixed on the right end of the drive shaft 23 and meshes with the rack 19. A drive gear 25 is fixed on the left end of the drive shaft 23 and meshes with the driven gear 22.

[0045] The recycling device also includes a controller, which is electrically connected to the liquid filling valve 12, the liquid discharging valve 13, the shut-off valve 5 and the lifting cylinder 14 via signal lines. The controller can control the start or stop of the liquid filling valve 12, the liquid discharging valve 13 and the shut-off valve 5, and can also control the extension or retraction of the piston rod of the lifting cylinder 14, which facilitates the operation of workers and has the characteristics of high automation.

[0046] A method for recovering heat from incinerator slag, comprising the following steps:

[0047] S1. The worker controls the liquid filling valve 12 to start, and injects a certain amount of tap water into the closed chamber 9 through the liquid filling valve 12. After a certain amount is injected, the liquid filling valve 12 is controlled to close. At this time, the tap water will submerge the impeller 21 and each heat exchange plate 10.

[0048] S2. The worker controls the start of the shut-off valve 5. The slag in the waste incinerator 1 passes through the slag discharge port 6 and the shut-off valve 5 in sequence, and finally falls onto the inclined plate 7. Under its own gravity, the slag slides down the slope of the inclined plate 7. The slag enters the through groove 11 in each heat exchange plate 10 from the top port of the through groove 11. Then the slag is blocked by the floating plate 17. After the slag has been discharged for a period of time, the worker controls the shut-off valve 5 to close. At this time, the heat on the slag is transferred to the heat exchange plate 10. The heat exchange plate 10 transfers the heat to the tap water to gradually heat the tap water.

[0049] In step S2, the slag discharged from the waste incinerator 1 is dispersed in the channels 11 of each heat exchange plate 10, and the heat exchange plates 10 are submerged in tap water. This disperses the heat on the slag, thereby increasing the contact area between the heat on the slag and the tap water, and realizing the recovery of heat from the slag into the tap water in a short time. This recovery device is superior to other methods. Figure 1The recovery device shown greatly improves the efficiency of heat recovery.

[0050] S3. Control the piston rod of the lifting cylinder 14 to perform reciprocating extension and retraction motion, the extension and retraction direction is as follows: Figure 3 As shown by the middle arrow, when the piston rod extends upward, it drives the lifting plate 15 to move upward. The lifting plate 15 drives each floating plate 17 to move upward. The floating plates 17 lift the slag in the channel 11 upward. At the same time, the lifting plate 15 also drives the rack 19 to move upward. The rack 19 drives the drive gear 24 to rotate. The drive gear 24 drives the drive shaft 23 to rotate. The drive shaft 23 drives the drive gear 25 to rotate. The drive gear 25 drives the driven gear 22 to rotate. The driven gear 22 drives the driven shaft 18 to rotate. The driven shaft 18 drives the impeller 21 to rotate. The impeller 21 agitates the tap water.

[0051] When the piston rod retracts downward, it drives the lifting plate 15 to move downward, which in turn drives the floating plates 17 to move downward. The slag in the channel 11 moves downward under its own weight. At the same time, the lifting plate 15 also drives the rack 19 to move downward, which in turn drives the drive gear 24 to reverse, thereby driving the impeller 21 to reverse. As the piston rod of the lifting cylinder 14 reciprocates, the slag in each heat exchange plate 10 moves up and down in the channel 11, while the impeller 21 rotates in both directions to agitate the tap water.

[0052] S4. After the lifting cylinder 14 has been working for a period of time, the controller controls the lifting cylinder 14 to close. At this time, all the heat on the slag can be recovered into the tap water, thus finally realizing the recovery of heat on the slag.

[0053] S5. After the recovery is complete, the worker controls the piston rod of the lifting cylinder 14 to retract downwards. Once the piston rod is fully retracted, as... Figure 9 As shown, each floating plate 17 retracts from the through groove 11 in the heat exchange plate 10, and the slag in the through groove falls onto the slope 16 of the lifting plate 15. Then the slag falls down the slope 16 to the ground, thereby discharging the used slag to the ground. After the slag in each heat exchange plate 10 has been discharged, the worker controls the piston rod of the lifting cylinder 14 to extend upward so that the floating plate 17 re-enters the through groove 11 of the heat exchange plate 10 in preparation for the second recovery of heat from the slag.

[0054] S6. The worker opens the outlet valve 13, and the heated tap water is discharged from the outlet valve 13. The discharged hot tap water can be used for the worker's daily life.

[0055] In step S3, the recovery device controls the reciprocating extension and retraction of the piston rod of the lifting cylinder 14, causing the slag in each heat exchange plate 10 to move up and down within the channel 11, while simultaneously causing the impeller 21 to rotate in both directions to agitate the tap water. Thus, the slag is in a state of up-and-down movement, while the tap water is in a state of flow, greatly increasing the contact area between the heat from the slag and the tap water, compared to... Figure 1 The recovery device shown can recover the heat from the slag into the tap water in a short time, thereby greatly improving the efficiency of heat recovery.

[0056] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A device for recovering heat from incinerator slag, characterized in that: It includes a gantry frame (2) located on the right side of the waste incinerator (1) and supported on the ground. A heat insulation tank (3) is welded inside the crossbeam of the gantry frame (2). A pipe (4) and a shut-off valve (5) are sequentially fixed on the top of the heat insulation tank (3). The top port of the shut-off valve (5) is connected to the ash discharge port (6) of the waste incinerator (1). An inclined plate (7) is welded inside the heat insulation tank (3) and is inclined downward to the right. The inclined plate (7) divides the heat insulation tank (3) into an upper sealed chamber (8) and a lower sealed chamber (9). Multiple heat exchange plates (10) are welded at intervals along the inclined surface of the inclined plate (7). Each heat exchange plate (10) penetrates downward through the bottom wall of the heat insulation tank (3). Each heat exchange plate (10) has a through groove (11) arranged along its length. A liquid filling valve (12) and a liquid discharging valve (13) communicating with the lower sealed chamber (9) are provided on the right side wall of the heat insulation tank (3). A lifting cylinder (14) fixed on the ground is provided directly below the heat insulation tank (3). A lifting plate (15) is fixed on the working end of the piston rod of the lifting cylinder (14). A forward-inclined slope (16) is provided on the front end face of the lifting plate (15). Multiple floating plates (17) corresponding to the heat exchange plate (10) are fixed on the slope (16). The upper end of each floating plate (17) extends from bottom to top into the through groove (11) and slides with the through groove (11). A stirring mechanism for stirring tap water is provided between the heat insulation tank (3) and the lifting plate (15). The stirring mechanism includes a driven shaft (18) rotatably mounted on the left side wall of the heat insulation tank (3), a rack (19) welded to the bottom surface of the lifting plate (15), and a mounting plate (20) welded to the bottom surface of the heat insulation tank (3). An impeller (21) located in the lower sealed cavity (9) is fixed on the right end of the driven shaft (18), and a driven gear (22) located outside the heat insulation tank (3) is fixed on the left end of the driven shaft (18). The mounting plate (20) is located to the left of the rack (19), and a drive shaft (23) is rotatably mounted inside the mounting plate (20). A drive gear (24) is fixed on the right end of the drive shaft (23), and the drive gear (24) meshes with the rack (19). A drive gear (25) is fixed on the left end of the drive shaft (23), and the drive gear (25) meshes with the driven gear (22).

2. The heat recovery device for recovering heat from incinerator slag according to claim 1, characterized in that: The gantry frame (2) has a rectangular groove inside its crossbeam, and the heat insulation tank (3) is welded into the rectangular groove.

3. The heat recovery device for recovering heat from incinerator slag according to claim 2, characterized in that: The pipe (4) is located directly above the high position of the inclined plate (7).

4. The heat recovery device for recovering heat from incinerator slag according to claim 3, characterized in that: The horizontal spacing between any two adjacent heat exchange plates (10) is equal, and the upper end of each heat exchange plate (10) is welded to the inclined plate (7), and the lower end of each heat exchange plate (10) is welded to the bottom wall of the heat insulation tank (3).

5. The heat recovery device for recovering heat from incinerator slag according to claim 4, characterized in that: The heat insulation tank (3) has a rectangular cross-section.

6. The heat recovery device for recovering heat from incinerator slag according to claim 5, characterized in that: A bearing seat is fixed on the right side wall of the mounting plate (20), and the drive shaft (23) is rotatably mounted in the bearing seat.

7. The heat recovery device for recovering heat from incinerator slag according to claim 6, characterized in that: A dynamic seal is provided between the driven shaft (18) and the side wall of the heat insulation tank (3).

8. The heat recovery device for recovering heat from incinerator slag according to claim 7, characterized in that: The recovery device also includes a controller, which is electrically connected to the liquid filling valve (12), the liquid discharging valve (13), the shut-off valve (5), and the lifting cylinder (14) via signal lines.

9. A method for recovering heat from incinerator slag, using the heat recovery device for recovering heat from incinerator slag as described in claim 8, characterized in that: It includes the following steps: S1. The worker controls the liquid filling valve (12) to start, and injects a certain amount of tap water into the sealed chamber (9) through the liquid filling valve (12). After injecting a certain amount, the worker controls the liquid filling valve (12) to close. At this time, the tap water will submerge the impeller (21) and each heat exchange plate (10). S2. The worker controls the start of the shut-off valve (5). The slag in the waste incinerator (1) passes through the slag discharge port (6) and the shut-off valve (5) in sequence, and finally falls onto the inclined plate (7). Under its own gravity, the slag slides down the inclined surface of the inclined plate (7). The slag enters the through groove (11) in each heat exchange plate (10) from the top port of the through groove (11). Then the slag is blocked by the floating plate (17). After the slag is discharged for a period of time, the worker controls the shut-off valve (5) to close. At this time, the heat on the slag is transferred to the heat exchange plate (10). The heat exchange plate (10) transfers the heat to the tap water to gradually heat the tap water. S3. Control the piston rod of the lifting cylinder (14) to perform reciprocating extension and retraction. When the piston rod extends upward, the piston rod drives the lifting plate (15) to move upward. The lifting plate (15) drives each floating plate (17) to move upward. The floating plate (17) lifts the slag in the through groove (11) upward. At the same time, the lifting plate (15) also drives the rack (19) to move upward. The rack (19) drives the drive gear (24) to rotate. The drive gear (24) drives the drive shaft (23) to rotate. The drive shaft (23) drives the drive gear (25) to rotate. The drive gear (25) drives the driven gear (22) to rotate. The driven gear (22) drives the driven shaft (18) to rotate. The driven shaft (18) drives the impeller (21) to rotate. The impeller (21) stirs the tap water. When the piston rod retracts downward, it drives the lifting plate (15) to move downward. The lifting plate (15) drives each floating plate (17) to move downward. The slag in the channel (11) moves downward under its own weight. At the same time, the lifting plate (15) also drives the rack (19) to move downward. The rack (19) drives the drive gear (24) to reverse, which in turn drives the impeller (21) to reverse. As the piston rod of the lifting cylinder (14) moves back and forth, the slag in each heat exchange plate (10) can move back and forth up and down in the channel (11), while the impeller (21) rotates back and forth in the forward and reverse directions to agitate the tap water. S4. After the lifting cylinder (14) has been working for a period of time, the controller controls the lifting cylinder (14) to close. At this time, all the heat on the slag can be recovered into the tap water, thus finally realizing the recovery of the heat on the slag. S5. After the recycling is completed, the worker controls the piston rod of the lifting cylinder (14) to retract downwards. When the piston rod is fully retracted, each floating plate (17) exits from the through groove (11) in the heat exchange plate (10). The slag in the through groove falls onto the slope (16) of the lifting plate (15), and then the slag falls down the slope (16) to the ground, thereby discharging the used slag onto the ground. After the slag in each heat exchange plate (10) is discharged, the worker controls the piston rod of the lifting cylinder (14) to extend upwards so that the floating plate (17) re-enters the through groove (11) of the heat exchange plate (10) to prepare for the second recycling of heat from the slag. S6. The worker opens the outlet valve (13), and the heated tap water is discharged from the outlet valve (13). The discharged hot tap water can be used for the worker's daily life.

Images