Integral uniform slagging device of roasting furnace

By designing a uniform ash discharge device for the stoker furnace, and utilizing components such as electric push rods and servo motors to achieve automated ash and slag cleaning, the problem of high temperature affecting cleaning in the stoker furnace was solved, and the cleaning efficiency and effect were improved.

CN224499162UActive Publication Date: 2026-07-14YANTAI PURI TECHNOLOGY DEVELOPMENT CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
YANTAI PURI TECHNOLOGY DEVELOPMENT CO LTD
Filing Date
2025-08-28
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

After the simmering oven has been simmering for a period of time, the oven body temperature is high. Manual cleaning requires a long wait and the cleaning effect is limited. The residue left behind affects the use of the simmering oven.

Method used

The design includes a uniform ash discharge device for the stoking furnace, comprising components such as a shaft, ash discharge plate, L-shaped rod, electric push rod, and servo motor. The electric push rod controls the tilting and rotation of the ash discharge plate, allowing ash to enter the ash discharge trough and be uniformly discharged through the spiral push rod, thus achieving automated cleaning.

Benefits of technology

It improves the efficiency and effectiveness of cleaning ash and slag inside the stoker, reduces manual waiting time, and ensures the continuous use of the stoker.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a whole even deslagging device of roasting furnace relates to roasting furnace deslagging technical field, the utility model discloses a shaft rod, one side of the shaft rod is provided with the furnace body, the outer surface of furnace body is provided with the deslagging subassembly, the deslagging subassembly includes the deslagging board, the deslagging board is fixed on the outer surface of shaft rod, the inner wall one side of rectangular groove is provided with the deslagging groove, the inner wall one side of furnace body is connected with L shape pole slidingly, the outer surface one side of furnace body is provided with first electric push rod, the output link of first electric push rod is connected with the connecting rod of rotation, the utility model discloses a deslagging subassembly is set up, through installing the deslagging board that can follow the rotation of shaft rod on the inner wall bottom end of furnace body, when needing to deslag in the furnace body, control deslagging board rotation, make the surface ash and slag through the deslagging groove one side of furnace body export to the collection residue groove inside and through the spiral push rod and promote ash and slag even move and concentrate export, improve the ash and slag cleaning effect and efficiency of roasting furnace inside.
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Description

Technical Field

[0001] This utility model relates to the field of slag discharge technology for stoker furnaces, and in particular to a device for uniform slag discharge of a stoker furnace. Background Technology

[0002] A low-temperature magnetization furnace is a processing device used for incinerating waste. In a relatively low-temperature environment, a specific magnetic field is applied to the waste material inside the furnace, causing a series of complex physical and chemical changes in the organic matter. The magnetic field enhances the activation energy of oxygen molecules in the air inside the waste, transforming molecular activity from disordered to ordered. Only a small amount of air is needed for complete combustion of the waste. During this process, the organic components in the waste are decomposed into combustible gases, biochar, and a small amount of inorganic ash.

[0003] After the waste is incinerated in a smoldering furnace, the ash residue will remain inside the furnace and needs to be cleaned manually with cleaning tools. Because the furnace body is at a high temperature for a short period of time after smoldering, manual cleaning takes a long time and has limited cleaning effect on the inside of the furnace. The ash residue remaining inside the smoldering furnace will affect the furnace's performance.

[0004] Therefore, a uniform slag discharge device for a stoking furnace is proposed. Utility Model Content

[0005] The purpose of this utility model is to solve the problem that the furnace body temperature is high for a short period of time after the simmering process, manual cleaning requires a long wait and has limited cleaning effect on the inside of the furnace body, and the ash residue left inside the simmering furnace will affect the use effect of the simmering furnace. Therefore, the proposed simmering furnace uniform ash discharge device is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a uniform slag discharge device for a smoldering furnace, comprising a shaft, a furnace body for mounting the shaft on one side, a slag discharge assembly on the outer surface of the furnace body, the slag discharge assembly comprising a slag discharge plate fixed to the outer surface of the shaft, a rectangular groove inside the furnace body, the slag discharge plate located above the rectangular groove, a slag discharge channel on one side of the inner wall of the rectangular groove, an L-shaped rod slidably connected to one side of the inner wall of the furnace body, the bottom side of the L-shaped rod near the slag discharge plate being inclined, two springs at one end of the L-shaped rod, the two ends of the two springs being fixedly connected to one side of the L-shaped rod and one side of the outer surface of the furnace body respectively, a first electric push rod on one side of the outer surface of the furnace body, the output rod of the first electric push rod being rotatably connected to a connecting rod, the end of the connecting rod away from the output rod of the first electric push rod being rotatably connected to one side of the shaft.

[0007] The effect achieved by the above components is as follows: After the ash is burned in the smoldering furnace, it remains on the ash plate inside the furnace. By controlling the extension of the first electric push rod, the connecting rod is pushed so that the two ends of the connecting rod rotate at the top of the output rod of the first electric push rod and one end of the shaft, respectively. This pushes the shaft to drive the ash plate to rotate inside the rectangular groove and tilt towards the ash groove. When the ash plate tilts, the end near the L-shaped rod will move at the bottom inclined surface of the L-shaped rod, pushing the L-shaped rod away from the furnace body and compressing the spring. Then, the ash on the surface of the ash plate will move towards the ash groove through the tilted surface of the ash plate, allowing the ash to enter the interior of the ash groove and be discharged through the ash groove. After the ash is discharged, the first electric push rod is operated to retract, driving the connecting rod to control the shaft and the ash plate to rotate back to the original angle. The spring compressed on one side of the L-shaped rod returns to its original state and pushes the L-shaped rod towards the interior of the furnace body, returning to its original position and fitting with one side of the ash plate to close the top of the rectangular groove.

[0008] Preferably, a second electric push rod is provided on one side of the outer surface of the furnace body, the output rod of the second electric push rod is equipped with a support rod, one end of the support rod is fixedly connected to a push plate, and the support rod slides on one side of the inner wall of the furnace body.

[0009] The effect achieved by the above components is as follows: when the slag discharge assembly operates and the slag discharge plate tilts towards the slag discharge trough, the second electric push rod on the outer surface of the furnace body can extend and push the support rod to slide on the inner wall of the furnace body. Through the push plate, the ash and slag near the top of the outer surface of the slag discharge plate are pushed downward on the outer surface of the slag discharge plate, thereby improving the efficiency of ash and slag output through the surface of the slag discharge plate.

[0010] Preferably, a slag collection trough is fixedly connected to one side of the outer surface of the furnace body, and a servo motor is provided on one side of the outer surface of the slag collection trough. A spiral push rod is installed at the output end of the servo motor through a coupling, and the spiral push rod is located inside the slag collection trough.

[0011] The effect achieved by the above components is as follows: the ash and slag output through the slag discharge trough will enter the interior of the slag collection trough. The servo motor operating on the outside of the slag collection trough can drive the spiral pusher to rotate. The rotation of the spiral pusher will push the ash and slag to move evenly on both sides of the spiral pusher, pushing the ash and slag to the end of the slag collection trough away from the servo motor for output.

[0012] Preferably, a screen is fixedly connected to one side of the bottom of the inner wall of the slag collection trough, and a guide plate is fixedly connected to one end of the outer surface of the slag collection trough near the screen.

[0013] The effect achieved by the above components is as follows: when the spiral pusher rotates and pushes the ash inside the slag collection trough to move to one end of the slag collection trough for output, when the ash passes the top of the screen, the fine ash will pass through the screen and enter the outer surface of the guide plate, and then be output along the outer surface of the guide plate. Larger impurities will be output through one end of the slag discharge trough, which facilitates the screening of ash.

[0014] Preferably, a first rotating shaft is rotatably connected to one side of the outer surface of the slag collection tank, a rotating plate is fixedly connected to the outer surface of the first rotating shaft, a first bevel gear is installed at the output end of the servo motor, a second rotating shaft is rotatably connected to one side of the outer surface of the slag collection tank, a second bevel gear is fixedly connected to the outer surface of the second rotating shaft, the outer surfaces of the first bevel gear and the second bevel gear mesh, and pulleys are fixedly connected to one end of the first rotating shaft and the second rotating shaft respectively, with belts sleeved on the outer side of the pulleys.

[0015] The effect achieved by the above components is as follows: when the servo motor drives the spiral push rod to rotate, the first bevel gear will drive the second bevel gear and the second shaft to rotate. The first shaft and the rotating plate will be driven to rotate through the pulley belt group at one end of the second shaft. The rotating plate can push the ash and slag entering the outer surface of the guide plate downward, so as to avoid the ash and slag accumulating on the outer surface of the guide plate.

[0016] Preferably, an inclined plate is fixedly connected to one side of the inner wall of the furnace body. The inclined plate is located above the slag discharge plate and inside the furnace body on the side away from the L-shaped rod. The bottom end of the inclined plate is on the side of the slag discharge plate that is inclined.

[0017] The effect achieved by the above components is that when the end of the slag discharge plate away from the L-shaped rod rotates downward, it will enter the bottom end of the inclined plate, and the ash and slag can enter the slag discharge trough more easily and quickly through the inclined surface at the bottom end of the inclined plate and between the slag discharge plate.

[0018] Preferably, a pad rod is fixedly connected to one side of the inner wall of the slag discharge trough, and the pad rod protrudes from one end of the inner wall of the slag discharge trough.

[0019] The effect achieved by the above components is that after the slag discharge plate rotates and tilts at an angle, one side of its bottom end will rest on the top of the pad rod. The pad rod can fill the gap between the bottom end of the slag discharge plate and the rectangular groove, preventing ash and slag from entering below the slag discharge plate.

[0020] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0021] In this invention, by setting up a slag discharge assembly, a slag discharge plate that can rotate with the shaft is installed at the bottom of the inner wall of the furnace body. When slag discharge is required inside the furnace body, the slag discharge plate is controlled to rotate, so that the ash and slag on the surface are output through the slag discharge trough on one side of the furnace body to the slag collection trough. The ash and slag are then pushed evenly and centrally by the spiral pusher, thereby improving the cleaning effect and efficiency of ash and slag inside the furnace. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2This is a three-dimensional structural diagram of the slag collection trough of this utility model;

[0024] Figure 3 This is a three-dimensional structural diagram of the first electric push rod of this utility model;

[0025] Figure 4 This is a partial cross-sectional three-dimensional structural diagram of the furnace body of this utility model;

[0026] Figure 5 This is a partial cross-sectional planar structural diagram of the furnace body of this utility model;

[0027] Figure 6 This is a three-dimensional structural diagram of the spiral push rod of this utility model.

[0028] Legend: 1. Shaft; 2. Slag discharge assembly; 21. Rectangular trough; 22. Slag discharge plate; 23. Slag discharge channel; 24. L-shaped rod; 25. Spring; 26. First electric push rod; 27. Connecting rod; 28. Second electric push rod; 29. ​​Support rod; 210. Push plate; 211. Slag collection channel; 212. Servo motor; 213. Spiral push rod; 214. Screen; 215. Guide plate; 216. First rotating shaft; 217. Rotating plate; 218. First bevel gear; 219. Second rotating shaft; 220. Second bevel gear; 221. Inclined plate; 222. Pad rod; 3. Furnace body. Detailed Implementation

[0029] Example 1, such as Figure 1-4As shown, the overall uniform slag discharge device of the stoking furnace includes a shaft 1. A furnace body 3 for mounting the shaft 1 is provided on one side. A slag discharge assembly 2 is provided on the outer surface of the furnace body 3. The slag discharge assembly 2 includes a slag discharge plate 22, which is fixed to the outer surface of the shaft 1. A rectangular groove 21 is opened inside the furnace body 3. The slag discharge plate 22 is located above the rectangular groove 21. A slag discharge groove 23 is opened on one side of the inner wall of the rectangular groove 21. An L-shaped rod 24 is slidably connected to one side of the inner wall of the furnace body 3. The L-shaped rod 24 is close to the slag discharge. One end of the plate 22 has a sloping bottom. Two springs 25 are installed at one end of the L-shaped rod 24. The two ends of the springs 25 are fixedly connected to one side of the L-shaped rod 24 and one side of the outer surface of the furnace body 3, respectively. A first electric push rod 26 is installed on one side of the outer surface of the furnace body 3. The output rod of the first electric push rod 26 is rotatably connected to a connecting rod 27. The end of the connecting rod 27 away from the output rod of the first electric push rod 26 is rotatably connected to one side of the shaft 1. By setting the ash discharge plate 22, after the waste is incinerated in the smoldering furnace, the ash remains in the smoldering furnace. Inside the furnace, on the slag discharge plate 22, the first electric push rod 26 extends and pushes the connecting rod 27, causing the two ends of the connecting rod 27 to rotate at the top of the output rod of the first electric push rod 26 and one end of the shaft 1, respectively. This pushes the shaft 1 to cause the slag discharge plate 22 to rotate inside the rectangular groove 21 and tilt towards the slag discharge groove 23. When the slag discharge plate 22 tilts, the end near the L-shaped rod 24 will move at the bottom inclined surface of the L-shaped rod 24, pushing the L-shaped rod 24 away from the furnace body 3 and compressing the spring 25. Subsequently, the slag discharge plate... The ash and slag on the surface of plate 22 will move towards the slag discharge trough 23 through the inclined slag discharge plate 22, so that the ash and slag enter the interior of the slag discharge trough 23 and are discharged through the slag discharge trough 23. After the slag discharge is completed, the first electric push rod 26 is operated to retract and drive the connecting rod 27 to control the shaft rod 1 and the slag discharge plate 22 to rotate back to the original angle. The spring 25 compressed on one side of the L-shaped rod 24 returns to its original state and pushes the L-shaped rod 24 towards the interior of the furnace body 3 to return to its original position and fit against one side of the slag discharge plate 22 to close the top of the rectangular trough 21.

[0030] Reference Figure 2-6 As shown in this embodiment: a second electric push rod 28 is provided on one side of the outer surface of the furnace body 3. The output rod of the second electric push rod 28 is equipped with a support rod 29. One end of the support rod 29 is fixedly connected to a push plate 210. The support rod 29 slides on one side of the inner wall of the furnace body 3. When the slag discharge assembly 2 operates and causes the slag discharge plate 22 to tilt towards the slag discharge trough 23, the second electric push rod 28 on the outer surface of the furnace body 3 can extend and push the support rod 29 to slide on the inner wall of the furnace body 3. The push plate 210 pushes the ash and slag near the top of the outer surface of the slag discharge plate 22 to move downward on the outer surface of the slag discharge plate 22, thereby improving the efficiency of ash and slag output through the surface of the slag discharge plate 22.

[0031] Reference Figure 2-6As shown in this embodiment: a slag collection trough 211 is fixedly connected to one side of the outer surface of the furnace body 3. A servo motor 212 is installed on one side of the outer surface of the slag collection trough 211. A spiral push rod 213 is installed at the output end of the servo motor 212 through a coupling. The spiral push rod 213 is located inside the slag collection trough 211. The ash and slag output through the slag discharge trough 23 will enter the interior of the slag collection trough 211. The servo motor 212 on the outside of the slag collection trough 211 can drive the spiral push rod 213 to rotate. The rotation of the spiral push rod 213 will push the ash and slag onto the spiral push rod 213. The screw pusher moves evenly on both sides, pushing the ash and slag to the end of the slag collection trough 211 away from the servo motor 212 for output. A screen 214 is fixedly connected to one side of the bottom of the inner wall of the slag collection trough 211. A guide plate 215 is fixedly connected to the end of the outer surface of the slag collection trough 211 near the screen 214. When the screw pusher 213 rotates and pushes the ash and slag inside the slag collection trough 211 to move to one end of the slag collection trough 211 for output, when the ash and slag pass the top of the screen 214, the fine ash and slag will pass through the screen 214 and enter the outer surface of the guide plate 215, and then follow the guide plate 215. Larger impurities are discharged through one end of the slag discharge trough 23, facilitating the screening of ash and slag. A first rotating shaft 216 is rotatably connected to one side of the outer surface of the slag collection trough 211. A rotating plate 217 is fixedly connected to the outer surface of the first rotating shaft 216. A first bevel gear 218 is installed at the output end of the servo motor 212. A second rotating shaft 219 is rotatably connected to one side of the outer surface of the slag collection trough 211. A second bevel gear 220 is fixedly connected to the outer surface of the second rotating shaft 219. The outer surfaces of the first bevel gear 218 and the second bevel gear 220 are connected... The first rotating shaft 216 and the second rotating shaft 219 are respectively fixedly connected to one end of pulleys. The pulleys are fitted with belts. When the servo motor 212 drives the spiral push rod 213 to rotate, the first bevel gear 218 will drive the second bevel gear 220 and the second rotating shaft 219 to rotate. The pulley belt group at one end of the second rotating shaft 219 drives the first rotating shaft 216 and the rotating plate 217 to rotate. The rotating plate 217 can push the ash and slag entering the outer surface of the guide plate 215 downward to prevent the ash and slag from accumulating on the outer surface of the guide plate 215.

[0032] Reference Figure 2-6As shown in this embodiment: an inclined plate 221 is fixedly connected to one side of the inner wall of the furnace body 3. The inclined plate 221 is located above the slag discharge plate 22 and is located inside the furnace body 3 on the side away from the L-shaped rod 24. The bottom end of the inclined plate 221 is inclined on the side near the slag discharge plate 22. When the end of the slag discharge plate 22 away from the L-shaped rod 24 rotates downward, it will enter the bottom end of the inclined plate 221. The ash and slag can enter the slag discharge trough 23 more easily and quickly through the inclined surface at the bottom end of the inclined plate 221 and the slag discharge plate 22. A pad rod 222 is fixedly connected to one side of the inner wall of the slag discharge trough 23. The pad rod 222 protrudes from one end of the inner wall of the slag discharge trough 23. After the slag discharge plate 22 rotates and tilts at an angle, the bottom end will rest on the top of the pad rod 222. The pad rod 222 can fill the gap between the bottom end of the slag discharge plate 22 and the rectangular trough 21, preventing ash and slag from entering below the slag discharge plate 22.

[0033] Working Principle: After the waste is incinerated in the smoldering furnace, the ash remains on the ash discharge plate 22 inside the furnace. By controlling the extension of the first electric push rod 26, the connecting rod 27 is pushed, causing the two ends of the connecting rod 27 to rotate at the top of the output rod of the first electric push rod 26 and one end of the shaft 1, respectively. This pushes the shaft 1 to drive the ash discharge plate 22 to rotate inside the rectangular groove 21 and tilt towards the ash discharge groove 23. When the ash discharge plate 22 tilts, the end near the L-shaped rod 24 moves at the bottom inclined surface of the L-shaped rod 24, pushing the L-shaped rod 24 away from the furnace body 3 and compressing the spring 25. Subsequently, the ash on the surface of the ash discharge plate 22 moves towards the ash discharge groove 23 through the tilted surface of the ash discharge plate 22. At the same time, the second electric push rod 28 on the outer surface of the furnace body 3 extends and pushes the support rod 29 to slide on the inner wall of the furnace body 3. Through the push plate 210, the ash near the top of the outer surface of the ash discharge plate 22 is pushed downward on the outer surface of the ash discharge plate 22, allowing the ash to enter the ash discharge. The ash is discharged from the inside of the trough 23 through the slag discharge trough 23, and then enters the slag collection trough 211. The servo motor 212 on the outside of the slag collection trough 211 drives the spiral push rod 213 to rotate. The rotation of the spiral push rod 213 will push the ash to move evenly on both sides of the spiral push rod 213, pushing the ash to the end of the slag collection trough 211 away from the servo motor 212 for output. When the ash passes the top of the screen 214, the fine ash will pass through the screen 214 and enter the outer surface of the guide plate 215, and then be output along the outer surface of the guide plate 215. Larger impurities will be output through one end of the slag discharge trough 23. After the slag is discharged, the first electric push rod 26 is operated to retract and drive the connecting rod 27 to control the shaft rod 1 and the slag discharge plate 22 to rotate back to the original angle. The spring 25 compressed on one side of the L-shaped rod 24 returns to its original state and pushes the L-shaped rod 24 to move inward toward the furnace body 3 and return to its original position to fit against one side of the slag discharge plate 22 to close the top of the rectangular trough 21.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. A uniform slag discharge device for a stoking furnace, including a shaft (1), characterized in that: A furnace body (3) for mounting the shaft (1) is provided on one side. A slag discharge assembly (2) is provided on the outer surface of the furnace body (3). The slag discharge assembly (2) includes a slag discharge plate (22). The slag discharge plate (22) is fixed on the outer surface of the shaft (1). A rectangular groove (21) is provided inside the furnace body (3). The slag discharge plate (22) is located above the rectangular groove (21). A slag discharge groove (23) is provided on one side of the inner wall of the rectangular groove (21). An L-shaped rod (24) is slidably connected to one side of the inner wall of the furnace body (3). The bottom side of the L-shaped rod (24) near the slag discharge plate (22) is inclined. Two springs (25) are provided at one end of the L-shaped rod (24). The two ends of the two springs (25) are fixedly connected to one side of the L-shaped rod (24) and one side of the outer surface of the furnace body (3), respectively. A first electric push rod (26) is provided on one side of the outer surface of the furnace body (3). The output rod of the first electric push rod (26) is rotatably connected to a connecting rod (27). The end of the connecting rod (27) away from the output rod of the first electric push rod (26) is rotatably connected to one side of the shaft (1).

2. The uniform slag discharge device for the stoking furnace according to claim 1, characterized in that: A second electric push rod (28) is provided on one side of the outer surface of the furnace body (3). The output rod of the second electric push rod (28) is equipped with a support rod (29). One end of the support rod (29) is fixedly connected to a push plate (210). The support rod (29) slides on one side of the inner wall of the furnace body (3).

3. The uniform slag discharge device for the stoking furnace according to claim 2, characterized in that: A slag collection trough (211) is fixedly connected to one side of the outer surface of the furnace body (3). A servo motor (212) is provided on one side of the outer surface of the slag collection trough (211). A spiral push rod (213) is installed at the output end of the servo motor (212) through a coupling. The spiral push rod (213) is located inside the slag collection trough (211).

4. The uniform slag discharge device for the stoking furnace according to claim 3, characterized in that: A screen (214) is fixedly connected to one side of the bottom of the inner wall of the slag collection trough (211), and a guide plate (215) is fixedly connected to one end of the outer surface of the slag collection trough (211) near the screen (214).

5. The uniform slag discharge device for the stoking furnace according to claim 4, characterized in that: A first rotating shaft (216) is rotatably connected to one side of the outer surface of the slag collection tank (211). A rotating plate (217) is fixedly connected to the outer surface of the first rotating shaft (216). A first bevel gear (218) is installed at the output end of the servo motor (212). A second rotating shaft (219) is rotatably connected to one side of the outer surface of the slag collection tank (211). A second bevel gear (220) is fixedly connected to the outer surface of the second rotating shaft (219). The outer surfaces of the first bevel gear (218) and the second bevel gear (220) mesh. A pulley is fixedly connected to one end of the first rotating shaft (216) and the second rotating shaft (219). A belt is sleeved on the outer side of the pulley.

6. The uniform slag discharge device for the stoking furnace according to claim 5, characterized in that: An inclined plate (221) is fixedly connected to one side of the inner wall of the furnace body (3). The inclined plate (221) is located above the slag discharge plate (22). The inclined plate (221) is located inside the furnace body (3) on the side away from the L-shaped rod (24). The bottom end of the inclined plate (221) is inclined on the side surface close to the slag discharge plate (22).

7. The uniform slag discharge device for the stoking furnace according to claim 6, characterized in that: A pad rod (222) is fixedly connected to one side of the inner wall of the slag discharge trough (23), and the pad rod (222) protrudes from one end of the inner wall of the slag discharge trough (23).