Waste incineration power plant slag outlet smoke treatment device
By designing a waste incineration power plant slag outlet smoke vapor treatment device including gas transmission pipes and cooling mechanisms, the problem that existing devices are difficult to withstand high pressure and poor cooling effects is solved, and the safety and efficient cooling of the device are achieved.
Patent Information
- Application Number
- CN202422129065.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-31
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-31
AI Technical Summary
When existing smoke vapor treatment devices deal with smoke vapor generated by waste incineration, they are difficult to withstand high pressure, which can easily lead to pipeline deformation or rupture, and have poor cooling effect. They lack effective pressure regulation mechanisms, which may lead to reverse circulation of smoke vapor and damage to equipment.
A smoke vapor treatment device including slag discharge pipe, exhaust fan, gas pipe, cooling mechanism, water pump and water tank is designed. The gas pipeline can flexibly respond to changes in air pressure through the combination of the first hose, frame and tension spring to prevent rupture; the cooling mechanism improves the cooling effect of smoke vapor through the cooperation of the cooling mechanism with the water pump and the water tank, and prevents the reverse circulation of smoke vapor by the setting of the shield plate and counterweight block.
It effectively prevents damage to the device caused by excessive air pressure, improves the cooling effect of smoke vapor, and prevents reverse circulation of smoke vapor, ensuring the normal operation and safety of the device.
Smart Images
Figure CN222992903U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of flue gas treatment, and particularly relates to a flue gas treatment device for the slag outlet of a waste incineration power plant. Background Art
[0002] A large amount of high-temperature flue gas is generated during the waste incineration process, and this high-temperature flue gas will be discharged along with the incinerated slag. In order to avoid the discharge of high-temperature flue gas, generally, a flue gas treatment device needs to be installed at the position of the slag outlet.
[0003] When the existing flue gas treatment device treats the flue gas generated by waste incineration, it usually adopts the method of extracting, cooling, and then using the cooled flue gas to cool the inside of the slag discharge pipe for the second time. This treatment method achieves the purpose of cooling and purifying the flue gas to a certain extent, but there are still many deficiencies in practical applications:
[0004] Firstly, when the air pressure of the flue gas extracted by the exhaust fan is too high, the existing pipeline system is often difficult to withstand this pressure, and it is easy to deform or even rupture, thus affecting the normal operation of the entire treatment device and even causing safety accidents; secondly, the existing flue gas treatment device has a poor cooling effect on the extracted flue gas; in addition, during the incineration process, if the air pressure inside the slag discharge pipe suddenly increases for some reason, the existing treatment device lacks an effective pressure regulating mechanism, which may cause the flue gas inside the slag discharge pipe to flow reversely into the treatment system, resulting in equipment damage.
[0005] Therefore, it is very necessary to invent a flue gas treatment device for the slag outlet of a waste incineration power plant. Content of the Utility Model
[0006] The purpose of the utility model is to provide a flue gas treatment device for the slag outlet of a waste incineration power plant to solve the problems mentioned in the background art.
[0007] To solve the above technical problems, the utility model is realized through the following technical solutions:
[0008] The utility model is a flue gas treatment device for the slag outlet of a waste incineration power plant, including a slag discharge pipe, an exhaust fan, an air delivery pipe, a cooling mechanism, a water pump, and a water tank. A plurality of the exhaust fans are fixed on the upper side of the output end of the slag discharge pipe through bolts, and the suction end of the exhaust fan faces the output end of the slag discharge pipe; the exhaust end of the exhaust fan is fixed with an air delivery pipe through a joint, and the other end of the air delivery pipe is fixed with the intake end of the cooling mechanism through a joint, and the cooling mechanism is fixed with the slag discharge pipe through bolts; the liquid inlet of the cooling mechanism is fixed with the output end of the water pump through a joint, and the input end of the water pump is fixed with the water tank through a joint, and both the water pump and the water tank are fixed on the outer side of the slag discharge pipe through bolts; the liquid outlet of the cooling mechanism is fixed with the water tank through a joint, and the inside of the water tank is filled with a coolant.
[0009] Furthermore, the air supply pipe includes a first hose, a frame and a tension spring, one end of the first hose is fixed to the air outlet end of the exhaust fan through a joint, and the other end of the first hose is fixed to the air inlet end of the cooling mechanism through a joint; a frame is fixed to the middle outer side surface of the first hose, wherein a tension spring is fixed to the lower side surface of the frame, and the other end of the tension spring is fixed to the outer side surface of the slag discharge pipe. Such an arrangement can flexibly respond to changes in internal air pressure and prevent damage due to excessive air pressure.
[0010] Furthermore, the cooling mechanism includes an outer shell, a cooling mechanism, a limiting column, a reflux pipe, a central axis, a baffle plate and a counterweight, wherein the outer shell is fixed to the slag discharge pipe by bolts, and the upper end of the outer shell is fixed to the gas pipe by a joint; a cooling mechanism is fixed inside the outer shell, wherein the input end of the cooling mechanism is connected to the water pump, and the output end of the cooling mechanism is connected to the water tank; a reflux pipe is fixed to the lower end of the outer shell by a joint; a central axis is fixed inside the reflux pipe, wherein the outer side surface of the central axis is rotatably mounted by a support bearing A baffle plate, the outer edge of which is in contact with the inner wall of the reflux pipe, and the upper and lower ends of the baffle plate are both arranged in an arc shape; a counterweight block is fixed by bolts at the end of the baffle plate away from the outer shell, and a limiting column is arranged on the side of the baffle plate close to the outer shell, wherein the two ends of the limiting column are respectively fixed to the inner wall of the reflux pipe. Such an arrangement can cool the absorbed high-temperature flue gas and cool the flue gas inside the slag discharge pipe by the cooled flue gas. In addition, it can prevent the flue gas inside the slag discharge pipe from reversely entering the cooling mechanism.
[0011] Furthermore, the cooling mechanism includes a mounting plate, fins, a cooling tube, a second hose, a third hose, a side plate, a guide column, a fixing frame and a spring, wherein two mounting plates are provided, wherein a plurality of fins are fixed between the mounting plates, the fins are all arranged obliquely, and a cooling tube is fixed inside the fins; a second hose is fixed to one end of the cooling tube through a joint, wherein the other end of the second hose is connected to a water pump through a joint; a third hose is fixed to the other end of the cooling tube through a joint, wherein the other end of the third hose is connected to a water tank through a joint; a side plate is fixed to the outer side surface of the mounting plate by welding, wherein a guide column is slidably installed inside the side plate; fixing frames are fixed to both ends of the guide column by welding, wherein the fixing frames are fixed to the inner wall of the outer shell by welding; springs are respectively provided on both sides of the side plate, wherein the springs are all sleeved on the outer side surface of the guide column, and such a setting can cooperate with the water pump and the water tank to convert the smoke inside the outer shell into low-temperature smoke.
[0012] Furthermore, a mixing tube is fixed at the outlet end of the reflux pipe for fully mixing the cold and hot gases.
[0013] Furthermore, the mixing pipe includes an intake pipe, a reducing pipe, an extraction pipe, and an exhaust pipe. One end of the intake pipe is fixed to the reflux pipe, and the other end of the intake pipe is fixed with a reducing pipe. The other end of the reducing pipe is fixed with an exhaust pipe, and an extraction pipe is fixed in the middle of the reducing pipe. The diameter of the reducing pipe is smaller than that of the intake pipe and the exhaust pipe, and the outer sides of the intake pipe and the exhaust pipe are both fixed to the inner wall of the slag discharge pipe through clamps. When in use, the airflow discharged through the reflux pipe can be discharged through the exhaust pipe, and under the action of Bernoulli's principle, the smoke in the slag discharge pipe can be extracted, so that it is mixed with the low-temperature gas entering from the reflux pipe inside the exhaust pipe, thereby avoiding the too-fast flow rate of the gas inside the slag discharge pipe, which causes the low-temperature gas to be discharged along with the smoke as soon as it is discharged into the slag discharge pipe.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] 1. With the arrangement of the air delivery pipe of the utility model, when in use, the first flexible pipe can flexibly respond to the change of air pressure inside the air delivery pipe. When the air pressure inside the first flexible pipe suddenly increases due to the smoke extracted by the exhaust fan, the first flexible pipe can shake correspondingly, thereby effectively relieving and dispersing the direct impact of the air pressure on the material of the first flexible pipe, avoiding the rupture or damage of the first flexible pipe caused by too large air pressure. At the same time, by setting a frame in the middle of the first flexible pipe and fixing it to the slag discharge pipe through a tension spring on the lower side of the frame, the effective control of the shaking amplitude of the first flexible pipe is realized, preventing accidents caused by too large shaking amplitude of the first flexible pipe.
[0016] 2. With the arrangement of the cooling mechanism of the utility model, when in use, through the cooperation of the cooling mechanism with the water pump and the water tank, the smoke inside the shell is converted into low-temperature smoke. During the process of cooling the smoke by the cooling mechanism, the gas inside the shell will be disturbed, so as to improve the cooling effect of the smoke. When the cooled smoke is discharged, it will overcome the gravity of the counterweight and drive the baffle to rotate around the central axis, so that the low-temperature smoke is discharged into the slag discharge pipe through the mixing pipe, thereby cooling the smoke inside the slag discharge pipe. During the process of the low-temperature smoke passing through the mixing pipe, Bernoulli's principle is used to cool part of the smoke inside the slag discharge pipe. At the same time, when the air pressure inside the slag discharge pipe is too large, the baffle will automatically close the reflux pipe under the joint action of the counterweight and the limit post, effectively preventing gas backflow. Description of the Drawings
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 It is a schematic structural diagram of the present utility model.
[0019] Figure 2 It is a schematic structural diagram of the gas transmission pipe of the present utility model.
[0020] Figure 3 It is a schematic structural diagram of the cooling mechanism of the present utility model.
[0021] Figure 4 It is a schematic structural diagram of the temperature reduction mechanism of the present utility model.
[0022] Figure 5 It is a schematic structural diagram of the side plate, guide post, fixing frame and spring of the present utility model.
[0023] Figure 6 It is a schematic structural diagram of the mixing pipe of the present utility model.
[0024] In the figure:
[0025] 1 - slag discharge pipeline, 2 - exhaust fan, 3 - gas transmission pipe, 31 - first hose, 32 - frame, 33 - tension spring, 4 - cooling mechanism, 41 - outer shell, 42 - temperature reduction mechanism, 421 - mounting plate, 422 - fin, 423 - temperature reduction pipe, 424 - second hose, 425 - third hose, 426 - side plate, 427 - guide post, 428 - fixing frame, 429 - spring, 43 - limit post, 44 - return pipe, 45 - central axis, 46 - baffle plate, 47 - counterweight, 48 - mixing pipe, 481 - air inlet pipe, 482 - reducing pipe, 483 - air extraction pipe, 484 - exhaust pipe, 5 - water pump, 6 - water tank. Specific embodiments
[0026] 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 making creative efforts belong to the protection scope of the present utility model.
[0027] In the description of the present utility model, it should be understood that the terms "upper", "middle", "outer", "inner", "around", etc. indicating orientation or positional relationships are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0028] Please refer to Figures 1 to 6As shown in the figure, the utility model relates to a device for treating flue gas at the slag outlet of a waste incineration power plant, which comprises a slag discharge pipe 1, a suction fan 2, an air delivery pipe 3, a cooling mechanism 4, a water pump 5 and a water tank 6. A plurality of suction fans 2 are fixedly mounted on the upper side of the output end of the slag discharge pipe 1 through bolts, wherein the suction end of the suction fan 2 faces the output end of the slag discharge pipe 1; the exhaust end of the suction fan 2 is fixedly connected with the air delivery pipe 3 through a joint, and the other end of the air delivery pipe 3 is fixedly connected with the intake end of the cooling mechanism 4 through a joint, and the cooling mechanism 4 is fixedly connected with the slag discharge pipe 1 through bolts; the liquid inlet of the cooling mechanism 4 is fixedly connected with the output end of the water pump 5 through a joint, wherein the input end of the water pump 5 is fixedly connected with the water tank 6 through a joint, and both the water pump 5 and the water tank 6 are fixedly mounted on the outer side of the slag discharge pipe 1 through bolts; the liquid outlet of the cooling mechanism 4 is fixedly connected with the water tank 6 through a joint, and a coolant is filled in the water tank 6.
[0029] Specifically, the air delivery pipe 3 comprises a first flexible pipe 31, a frame 32 and a tension spring 33. One end of the first flexible pipe 31 is fixedly connected with the air outlet end of the suction fan 2 through a joint, and the other end of the first flexible pipe 31 is fixedly connected with the intake end of the cooling mechanism 4 through a joint; a frame 32 is fixedly mounted on the outer side of the middle part of the first flexible pipe 31, and a tension spring 33 is fixedly mounted on the lower side of the frame 32, and the other end of the tension spring 33 is fixedly connected with the outer side of the slag discharge pipe 1. During use, the first flexible pipe 31 can convey the flue gas extracted by the suction fan 2 into the cooling mechanism 4. At the same time, when the air pressure in the first flexible pipe 31 suddenly increases, the first flexible pipe 31 can shake correspondingly, so as to avoid damage to the first flexible pipe 31 caused by excessive air pressure. Moreover, through the cooperation of the frame 32 and the tension spring 33, the shaking amplitude of the first flexible pipe 31 can be limited to prevent the first flexible pipe 31 from shaking too much.
[0030] Specifically, the cooling mechanism 4 includes a housing 41, a temperature reduction mechanism 42, a limiting post 43, a return pipe 44, a central shaft 45, a shielding plate 46, a counterweight 47, and a mixing pipe 48. The housing 41 is fixed to the slag discharge pipe 1 by bolts, and the upper end of the housing 41 is fixed to the air delivery pipe 3 by a joint; the temperature reduction mechanism 42 is fixed inside the housing 41, wherein the input end of the temperature reduction mechanism 42 is connected to the water pump 5, and the output end of the temperature reduction mechanism 42 is connected to the water tank 6; the lower end of the housing 41 is fixed with a return pipe 44 by a joint, and the other end of the return pipe 44 is fixed with a mixing pipe 48 by a joint, wherein both the return pipe 44 and the mixing pipe 48 are fixed inside the slag discharge pipe 1 by clamps; a central shaft 45 is fixed inside the return pipe 44, wherein a shielding plate 46 is rotatably installed on the outer side of the central shaft 45 through a support bearing, the outer edge of the shielding plate 46 is in contact with the inner wall of the return pipe 44, and both the upper and lower ends of the shielding plate 46 are arc-shaped; a counterweight 47 is fixed to one end of the shielding plate 46 away from the housing 41 by bolts, and a limiting post 43 is arranged on one side of the shielding plate 46 close to the housing 41, wherein both ends of the limiting post 43 are fixed to the inner wall of the return pipe 44. During use, the high-temperature flue gas inside the air delivery pipe 3 will pass through the temperature reduction mechanism 42, and the flue gas is converted into low-temperature flue gas by the temperature reduction mechanism 42. The low-temperature flue gas will overcome the gravity of the counterweight 47 and drive the shielding plate 46 to rotate around the central shaft 45, so that the low-temperature flue gas is discharged into the slag discharge pipe 1 through the mixing pipe 48 to cool the flue gas inside the slag discharge pipe 1. When the air pressure inside the slag discharge pipe 1 is too high, the shielding plate 46 will cooperate with the counterweight 47 and the limiting post 43 to block the return pipe 44.
[0031] Specifically, the temperature reduction mechanism 42 includes mounting plates 421, fins 422, cooling pipes 423, second hoses 424, third hoses 425, side plates 426, guide columns 427, fixing brackets 428 and springs 429. There are two mounting plates 421, and a number of fins 422 are fixed between the mounting plates 421. The fins 422 are all inclined, and a cooling pipe 423 is fixed inside the fins 422; one end of the cooling pipe 423 is fixed with a second hose 424 through a joint, and the other end of the second hose 424 is connected to the water pump 5 through a joint; the other end of the cooling pipe 423 is fixed with a third hose 425 through a joint, and the other end of the third hose 425 is connected to the water tank 6 through a joint; the outer side of the mounting plate 421 is fixed with a side plate 426 by welding, and a guide column 427 is slidably installed inside the side plate 426; both ends of the guide column 427 are fixed with fixing brackets 428 by welding, and the fixing brackets 428 are all fixed to the inner wall of the housing 41 by welding; springs 429 are respectively arranged on both sides of the side plate 426, and the springs 429 are all sleeved on the outer side of the guide column 427. When the flue gas enters the inside of the housing 41, the flue gas can pass through between the fins 422. Among them, when the flue gas passes through between the fins 422, it will be converted into low-temperature flue gas under the cooperation of the fins 422, the cooling pipe 423, the water pump 5 and the water tank 6. And because the fins 422 are inclined, when the flue gas passes through between the fins 422, a radial thrust will be applied to the fins 422. This thrust will cooperate with the tension of the spring 429 to make the fins 422 and the mounting plate 421 shake along the guide column 427, so as to disturb the gas inside the housing 41, thereby improving the temperature reduction effect of the flue gas.
[0032] Specifically, the mixing pipe 48 includes an air inlet pipe 481, a reducing pipe 482, an air extraction pipe 483 and an exhaust pipe 484. One end of the air inlet pipe 481 is fixed to the return pipe 44, and the other end of the air inlet pipe 481 is fixed with a reducing pipe 482; the other end of the reducing pipe 482 is fixed with an exhaust pipe 484, and an air extraction pipe 483 is fixed in the middle of the reducing pipe 482; the diameter of the reducing pipe 482 is smaller than the diameters of the air inlet pipe 481 and the exhaust pipe 484, and the outer sides of the air inlet pipe 481 and the exhaust pipe 484 are both fixed to the inner wall of the slag discharge pipe 1 through clamps. When in use, the air flow discharged through the return pipe 44 will sequentially pass through the air inlet pipe 481 and the reducing pipe 482, and then be discharged through the exhaust pipe 484. Among them, due to the change of the pipe diameter, when the gas passes through the reducing pipe 482, it will accelerate, and the high-temperature flue gas inside the slag discharge pipe 1 will be extracted through the air extraction pipe 483 (Bernoulli principle), so that it is mixed with the low-temperature gas entering from the return pipe 44 inside the exhaust pipe 484, thereby preventing the flow rate of the gas inside the slag discharge pipe 1 from being too fast, resulting in the low-temperature gas being discharged along with the flue gas as soon as it is discharged into the slag discharge pipe 1.
[0033] Please refer to Figures 1 - 5 As shown, the utility model is a smoke and steam treatment device for the slag outlet of a waste incineration power plant, and its working principle is as follows: during use, the incinerated waste is discharged through the slag discharge pipe 1. When discharging the incinerated waste, the exhaust fan 2 can extract the smoke and steam at the discharge port of the slag discharge pipe 1, and then transport the smoke and steam to the inside of the cooling mechanism 4 through the air delivery pipe 3. With the cooperation of the cooling mechanism 4, the water pump 5 and the water tank 6, the smoke and steam are cooled, and finally the cooled smoke and steam are discharged into the slag discharge pipe 1 to cool the inside of the slag discharge pipe 1.
[0034] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0035] The preferred embodiments of the utility model disclosed above are only used to help illustrate the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the utility model, so that those skilled in the art in the relevant technical field can well understand and utilize the utility model. The utility model is only limited by the claims and their full scope and equivalents.
Claims
1. A fume treatment device for a slag outlet of a waste incineration power plant, comprising a slag outlet pipeline (1), an exhaust fan (2), an air pipe (3), a cooling mechanism (4), a water pump (5) and a water tank (6), characterized in that: A plurality of exhaust fans (2) are fixed to the upper side of the output end of the slag discharge pipe (1), wherein the air suction end of the exhaust fan (2) faces the output end of the slag discharge pipe (1); an air supply pipe (3) is fixed to the exhaust end of the exhaust fan (2), wherein the other end of the air supply pipe (3) is fixed to the air intake end of a cooling mechanism (4), and the cooling mechanism (4) is fixed to the slag discharge pipe (1); the liquid inlet of the cooling mechanism (4) is fixed to the output end of a water pump (5), wherein the input end of the water pump (5) is fixed to a water tank (6), and the water pump (5) and the water tank (6) are both fixed to the outer side of the slag discharge pipe (1); the liquid outlet of the cooling mechanism (4) is fixed to the water tank (6), and the interior of the water tank (6) is filled with cooling liquid.
2. A fume treatment device for a slag outlet of a waste incineration power plant as claimed in claim 1, characterized in that: The gas delivery pipe (3) comprises a first hose (31), a frame (32) and a tension spring (33); one end of the first hose (31) is fixed to the air outlet end of the exhaust fan (2), and the other end of the first hose (31) is fixed to the air inlet end of the cooling mechanism (4); a frame (32) is fixed to the middle outer side surface of the first hose (31), wherein a tension spring (33) is fixed to the lower side surface of the frame (32), and the other end of the tension spring (33) is fixed to the outer side surface of the slag discharge pipe (1).
3. The device for treating flue gas at the slag outlet of a waste incineration power plant according to claim 1, characterized in that: The cooling mechanism (4) comprises an outer shell (41), a cooling mechanism (42), a limiting column (43), a return pipe (44), a central axis (45), a shielding plate (46) and a counterweight (47); the outer shell (41) is fixed to the slag discharge pipe (1), and the upper end of the outer shell (41) is fixed to the gas transmission pipe (3); the inner part of the outer shell (41) is fixed with the cooling mechanism (42), wherein the input end of the cooling mechanism (42) is connected to the water pump (5), and the output end of the cooling mechanism (42) is connected to the water tank (6); the lower end of the outer shell (41) is fixed with the return pipe (44), and the output end of the cooling mechanism (42) is connected to the water tank (6). A return pipe (44); a central axis (45) is fixed inside the return pipe (44), wherein a shielding plate (46) is rotatably mounted on the outer side surface of the central axis (45), the outer edge of the shielding plate (46) contacts the inner wall of the return pipe (44), and the upper and lower ends of the shielding plate (46) are both arranged in an arc shape; a counterweight (47) is fixed to one end of the shielding plate (46) away from the outer shell (41), and a limiting column (43) is arranged on the side of the shielding plate (46) close to the outer shell (41), wherein the two ends of the limiting column (43) are respectively fixed to the inner wall of the return pipe (44).
4. A fume treatment device for a slag outlet of a waste incineration power plant as claimed in claim 3, characterized in that: The cooling mechanism (42) comprises a mounting plate (421), fins (422), a cooling tube (423), a second hose (424), a third hose (425), a side plate (426), a guide column (427), a fixing frame (428) and a spring (429); two mounting plates (421) are provided, wherein a plurality of fins (422) are fixed between the mounting plates (421); the fins (422) are all arranged obliquely, and a cooling tube (423) is fixed inside the fins (422); a second hose (424) is fixed at one end of the cooling tube (423), wherein the other end of the second hose (424) is fixed to the cooling tube (423); The cooling tube (423) is connected to a water pump (5) at one end; a third hose (425) is fixed to the other end of the cooling tube (423), wherein the other end of the third hose (425) is connected to a water tank (6); a side plate (426) is fixed to the outer side surface of the mounting plate (421), wherein a guide column (427) is slidably mounted inside the side plate (426); fixing frames (428) are fixed to both ends of the guide column (427), wherein the fixing frames (428) are fixed to the inner wall of the housing (41); springs (429) are respectively arranged on both sides of the side plate (426), wherein the springs (429) are sleeved on the outer side surface of the guide column (427).
5. The device for treating flue gas at the slag outlet of a waste incineration power plant as claimed in claim 3, characterized in that: A mixing tube (48) is fixed at the outlet end of the return pipe (44) for fully mixing the cold and hot gases.
6. A fume treatment device for a slag outlet of a waste incineration power plant as claimed in claim 5, characterized in that: The mixing pipe (48) comprises an air intake pipe (481), a reducer (482), an air extraction pipe (483) and an exhaust pipe (484); one end of the air intake pipe (481) is fixed to the return pipe (44), and the other end of the air intake pipe (481) is fixed to the reducer (482); the other end of the reducer (482) is fixed to the exhaust pipe (484), and the middle part of the reducer (482) is fixed to the air extraction pipe (483); the diameter of the reducer (482) is smaller than the diameters of the air intake pipe (481) and the exhaust pipe (484), and the outer side surfaces of the air intake pipe (481) and the exhaust pipe (484) are fixed to the inner wall of the slag discharge pipe (1) via clamps.