CN110454797B

CN110454797B - Magnetizing degradation furnace

Info

Publication number: CN110454797B
Application number: CN201910865852.XA
Authority: CN
Inventors: 张晓琳
Original assignee: Xinhe Tianjin Environmental Technology Development Co ltd
Current assignee: Xinhe Tianjin Environmental Technology Development Co ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2024-03-29
Anticipated expiration: 2039-09-12
Also published as: CN110454797A

Abstract

The utility model belongs to the technical field of garbage treatment equipment, and provides a magnetized degradation furnace which comprises a furnace body, a percolate circulating treatment system and a flue gas treatment system. The leachate circulation treatment system is additionally arranged, so that leachate is circularly put into the cooling work of smoke dust during the treatment period of garbage, and the leachate circulation treatment system has the advantages of simple structure, small occupied area and low cost, thereby being matched with a furnace body for use and improving the market popularization value of the magnetized degradation furnace.

Description

Magnetizing degradation furnace

Technical Field

The utility model belongs to the technical field of garbage treatment equipment, and particularly relates to a magnetizing degradation furnace.

Background

In the prior art, for the treatment of organic waste, one of the devices used is a magnetizing degradation furnace. The treatment process is generally as follows: organic waste (garbage) is put into the treatment chamber from the input port of the furnace body and is ignited by open fire; the lower part around the furnace body is provided with a plurality of magnetizers, air enters the furnace after being magnetized by the magnetizers, so that the decomposition of garbage in the furnace is effectively promoted (the activation energy of oxygen is greatly improved), combustible substances (such as paper scraps, plastics, wood scraps and the like) in the garbage to be treated are partially combusted, the furnace body is heated, and the generated heat causes organic substances in the garbage to continuously carry out pyrolysis reaction; the pyrolysis gasification products and a small amount of fly ash are discharged into the atmosphere after being further processed by a water tank and a flue; the pyrolysis solid products (powder) which can be used as fertilizer and the incombustible substances (glass, metal, ceramic and the like) in the garbage are discharged from a discharge outlet at the lower part of the furnace body together.

The utility model patent with application number 201420748809.8 discloses a magnetizing and degrading furnace for treating organic waste, wherein in the treating process of the magnetizing and degrading furnace, garbage is firstly crushed and then extruded, percolate in the garbage is collected in the extruding process, and then the extruded garbage is sent into a furnace body through an automatic feeding conveyor. For landfill leachate, only the treatment mode at present is to match a set of special leachate treatment equipment for each magnetizing degradation furnace, so that the cost of the whole set of magnetizing degradation furnace is high, and the market popularization value of the magnetizing degradation furnace is reduced.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a magnetizing degradation furnace so as to reduce the cost and improve the market popularization value.

In order to achieve the above object, the present utility model provides a magnetization degradation furnace comprising:

the furnace body comprises a reaction chamber, a cooling chamber and a effusion chamber, wherein the cooling chamber and the effusion chamber are respectively arranged above and below the reaction chamber, the reaction chamber is communicated with the cooling chamber through a smoke outlet arranged at the top of the reaction chamber, an insulating layer is arranged outside the reaction chamber, a percolate collecting cavity is formed between the reaction chamber and the insulating layer, a percolate collecting hole is formed in the inner wall of the reaction chamber, and the percolate collecting hole is communicated with the effusion chamber through the percolate collecting cavity;

the leachate circulation treatment system comprises a collecting tank, a circulating pump, a liquid inlet pipeline, an evaporating plate, a first liquid return pipeline and a second liquid return pipeline, wherein the collecting tank is arranged below the furnace body, the circulating pump is arranged on the collecting tank, one end of the liquid inlet pipeline is connected with the circulating pump, the other end of the liquid inlet pipeline is positioned in the cooling chamber and is provided with a nozzle at a liquid outlet, the evaporating plate is arranged in the cooling chamber and is positioned above the smoke outlet, the nozzle is aligned with the evaporating plate, two ends of the first liquid return pipeline are respectively communicated with the cooling chamber and the collecting tank, and two ends of the second liquid return pipeline are respectively communicated with the effusion chamber and the collecting tank; and

the flue gas treatment system comprises a flue gas discharge branch pipe and a flue gas discharge main pipe, wherein two ends of the flue gas discharge branch pipe are respectively communicated with the cooling chamber and the flue gas discharge main pipe.

Further, the upper end of the smoke exhaust manifold is provided with an electrostatic dust collector, the lower end of the smoke exhaust manifold is provided with a dust collection box, the dust collection box is provided with a water leakage hole, the lower end of the smoke exhaust manifold is communicated with the collecting tank through a return pipe, and the return pipe is used for guiding water leaked from the water leakage hole to the collecting tank.

Further, be provided with filter equipment on the second liquid return pipeline, filter equipment includes:

a housing having a pipe portion provided at one end thereof in a longitudinal direction for allowing the percolate to pass therethrough, and having a slag discharge port provided at the other end thereof with a downward opening;

the recovery box is detachably arranged at the other end of the shell and is positioned right below the slag discharging port;

a driving shaft rotatably provided on the housing in a longitudinal direction;

the fixed bracket is sleeved on the driving shaft;

the movable brackets are arranged around the circumference of the driving shaft, and one ends of the movable brackets are rotationally connected with the fixed brackets;

the filter screen is arranged at the other end of the movable bracket;

a driving device for intermittently driving the driving shaft to rotate so as to enable the filter screen to move back and forth at a position in the pipe part and a position right above the slag discharge port; and

and the turnover mechanism is used for enabling the filter screen to turn over at the slag discharge port so as to pour impurities in the filter screen into the recovery box through the slag discharge port.

Further, the turnover mechanism includes:

the auxiliary bracket is arranged at one end of the fixed bracket, which is close to the slag discharging port;

the rotating shaft is rotatably arranged on the auxiliary bracket;

the cylindrical gear and the first bevel gear are coaxially sleeved on the rotating shaft;

the arc-shaped rack is arranged in the shell and can be meshed with the cylindrical gear; and

the second bevel gear is sleeved at one end of the movable support and meshed with the first bevel gear.

Further, a reducing pipe is arranged at the liquid inlet end in the pipe part and positioned above the filter screen, the outer peripheral surface of the upper end of the reducing pipe is in sealing fit with the inner peripheral surface of the pipe part, and the size of the lower end of the reducing pipe is smaller than that of the filter screen.

Further, the filter screen is made of hard materials.

Further, the evaporation plate comprises a bottom and a flange extending upwards from the bottom, and the first liquid return pipeline is communicated with the bottom.

Further, the bottom is provided with a plurality of liquid storage tanks which are recessed downwards.

The utility model has the beneficial effects that: the leachate circulation treatment system is additionally arranged, so that leachate is circularly put into the cooling work of smoke dust during the treatment period of garbage, and the leachate circulation treatment system has the advantages of simple structure, small occupied area and low cost, thereby being matched with a furnace body for use and improving the market popularization value of the magnetized degradation furnace.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a magnetizing degradation furnace provided in an embodiment of the present application;

FIG. 2 is an enlarged schematic view of portion A in FIG. 1;

fig. 3 is a schematic view of a partial perspective structure of a magnetizing degradation furnace according to an embodiment of the present application;

FIG. 4 is a schematic view of a portion of a flue gas treatment system;

FIG. 5 is a schematic view of a filter arrangement;

fig. 6 is a schematic view of a part of a perspective structure of the filtering device.

Reference numerals:

10-furnace body, 11-reaction chamber, 12-cooling chamber, 13-effusion chamber, 111-smoke outlet, 112-percolate collecting hole, 113-percolate collecting cavity and 20-feeding system;

30-percolate circulation treatment system, 31-collecting tank, 32-circulation pump, 33-liquid inlet pipeline, 34-nozzle, 35-evaporating plate, 351-bottom, 352-flange, 353-liquid storage tank, 36-first liquid return pipeline and 37-second liquid return pipeline;

38-filtering device, 381-shell, 3811-pipe part, 3812-slag outlet, 382-recovery box, 383-driving shaft, 384-fixed bracket, 385-movable bracket, 386-filter screen, 387-driving device, 388-turnover mechanism, 3881-auxiliary bracket, 3882-rotating shaft, 3883-cylindrical gear, 3884-first bevel gear, 3885-arc rack, 3886-second bevel gear and 389-reducer;

40-flue gas treatment system, 41-main flue gas pipe, 42-branch flue gas pipe, 43-dust collector, 44-noble metal catalyst, 45-dust collection box, 451-water leakage hole and 46-return pipe.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

As shown in fig. 1 to 6, the present embodiment provides a magnetization degradation furnace, which includes a furnace body 10, an air intake system, a feeding system 20, a percolate circulation processing system 30, a flue gas processing system 40, and the like.

The furnace body 10 mainly comprises a cooling chamber 12, a reaction chamber 11 and a effusion chamber 13 which are sequentially arranged from top to bottom. The feeding system 20 pours the garbage into the reaction chamber 11, and the air intake system includes an air intake pipe communicating with the bottom 351 of the reaction chamber 11 and an air magnetizer provided on the air intake pipe. The top of the reaction chamber 11 is provided with a smoke outlet 111, and the communication between the smoke outlet 111 and the cooling chamber 12 is realized. An insulating layer is arranged outside the reaction chamber 11, a percolate collecting cavity 113 is formed between the reaction chamber 11 and the insulating layer, a percolate collecting hole 112 is formed in the inner wall of the reaction chamber 11, and the percolate collecting hole 112 is communicated with the effusion chamber 13 through the percolate collecting cavity 113. The percolate from the waste flows through the percolate collection holes 112 into the percolate collection chamber 113 and then merges into the accumulation chamber 13.

The percolate circulation treatment system 30 comprises a collection tank 31, a circulation pump 32, a feed line 33, an evaporation plate 35, a first return line 36 and a second return line 37.

The collection tank 31 is disposed below the furnace body 10, and a groove for placing the collection tank 31 is generally dug out on the ground. The circulating pump 32 is arranged on the collecting tank 31, one end of the liquid inlet pipeline 33 is connected with the circulating pump 32, the other end of the liquid inlet pipeline 33 is positioned in the cooling chamber 12, a nozzle 34 is arranged at the liquid outlet, the evaporation plate 35 is arranged in the cooling chamber 12 and above the smoke outlet 111, the nozzle 34 is aligned with the evaporation plate 35, the number of the nozzles 34 can be one or more, and the recycled percolate sprayed from the nozzle 34 is directly sprayed onto the evaporation plate 35. Since the evaporation plate 35 is heated by the flue gas discharged from the reaction chamber 11, the percolate sprayed onto the evaporation plate 35 is partially evaporated, thereby lowering the temperature of the flue gas. The first liquid return pipeline 36 is respectively communicated with the cooling chamber 12 and the collecting tank 31 at two ends, and the second liquid return pipeline 37 is respectively communicated with the effusion chamber 13 and the collecting tank 31 at two ends. In one embodiment, a water make-up pump is also mounted to the collection tank 31 to reduce the temperature of the flue gas by supplementing water to the collection tank 31 when the amount of recycled percolate is insufficient to reduce the temperature of the flue gas to within a specified temperature range.

The flue gas treatment system 40 comprises a flue gas exhaust branch pipe 42 and a flue gas exhaust main pipe, and two ends of the flue gas exhaust branch pipe 42 are respectively communicated with the cooling chamber 12 and the flue gas exhaust main pipe. The upper end of the fume exhaust manifold is provided with a noble metal catalyst 44, and before the fume reacts with the noble metal catalyst 44, the fume is dedusted by an electrostatic dedusting device 43. In one embodiment, the upper end of the fume exhaust manifold is provided with an electrostatic dust collector 43, and the cleaning efficiency of the electrostatic dust collector 43 is high. The lower end of the smoke exhaust manifold is provided with a dust collection box 45, dust captured by the electrostatic dust collector 43 falls down into the dust collection box 45, a water leakage hole 451 is formed in the dust collection box 45, percolate contained in the dust flows down through the water leakage hole 451 and flows back into the collection tank 31 through a return pipe 46 arranged at the lower end of the smoke exhaust manifold.

The top of the smoke exhaust main pipe is also provided with a temperature sensor for monitoring the temperature of smoke exhausted from the smoke exhaust main pipe, the temperature sensor is electrically connected with an electric control cabinet arranged outside the furnace body 10, the electric control cabinet comprises a PLC, and after receiving a temperature signal sent by the temperature sensor, the PLC controls equipment such as a circulating pump 32, a water supplementing pump and the like to work. Since the control part is of common general knowledge, the present application will not be described in detail herein.

In one embodiment, the second liquid return line 37 is provided with a filter device 38, and the filter device 38 includes a housing 381, a recovery tank 382, a drive shaft 383, a fixed bracket 384, a movable bracket 385, a filter screen 386, a drive device 387, and a flip mechanism 388.

The housing 381 has a longitudinally disposed tube portion 3811 at one end for passing the percolate therethrough, the tube portion 3811 being adapted to be connected to the second return line 37 during operation, and a downwardly open discharge port 3812 at the other end. A recovery tank 382 is mounted right under the slag discharge port 3812, and the recovery tank 382 is detachably connected to the housing 381.

The drive shaft 383 is rotatably provided on the housing 381 in the longitudinal direction, preferably in the middle of the housing 381. One end of the drive shaft 383, which is located on the housing 381, is sleeved with a fixing bracket 384, and one end, which is located outside the housing 381, is connected with the driving device 387. The fixed bracket 384 is provided with a plurality of movable brackets 385, and the plurality of movable brackets 385 are uniformly distributed around the axial direction of the driving shaft 383, and preferably the number of the movable brackets 385 is two. One end of the movable bracket 385 is rotatably connected with the fixed bracket 384, and the other end is provided with a filter screen 386. The filter screen 386 may be a flexible screen, and in one embodiment, the filter screen 386 is made of a hard material, preferably stainless steel.

The driving device 387 is used for intermittently driving the driving shaft 383 to rotate so as to enable the filter screen 386 to move back and forth at a position located in the pipe portion 3811 and at a position right above the slag discharging opening 3812. The driving device 387 may be composed of a motor and an intermittent motion mechanism, or may be directly composed of a motor, in which case the motor is a servo motor or a stepper motor, and the motor is connected with an electric control cabinet and is controlled by the electric control cabinet to work.

And a turnover mechanism 388 for turning the filter screen 386 at the slag discharge port 3812 to pour the impurities located in the filter screen 386 into the recovery tank 382 through the slag discharge port 3812. That is, when a filter screen 386 containing impurities is stopped just above the slag discharge port 3812 or passes above the slag discharge port 3812, the filter screen 386 is turned, typically 180 ° by the turning mechanism 388, so that the impurities fall into the collecting box below. The turnover mechanism 388 can be a gear-rack mechanism with a power source for moving the rack, and the gear is sleeved on the movable bracket 385. In one embodiment, the flipping mechanism 388 includes a sub-mount 3881, a spindle 3882, a cylindrical gear 3883, a first bevel gear 3884, an arcuate rack 3885, and a second bevel gear 3886. The sub-bracket 3881 is disposed at one end of the fixing bracket 384 near the slag discharge port 3812, and preferably the sub-bracket 3881 is integrally formed with the fixing bracket 384. The rotating shaft 3882 is rotatably disposed on the sub-bracket 3881, and the cylindrical gear 3883 and the first bevel gear 3884 are coaxially sleeved on the rotating shaft 3882. The arc-shaped rack 3885 is fixed in the housing 381, and when the cylindrical gear 3883 rotates to a certain position along with the fixing bracket 384, the cylindrical gear 3883 starts to mesh with the arc-shaped rack 3885. A second bevel gear 3886 is fitted over the one end of the movable bracket 385 and is engaged with the first bevel gear 3884. During the engagement of the cylindrical gear 3883 with the curved rack 3885, the movable bracket 385 is finally rotated by the transmission of the first bevel gear 3884 and the second bevel gear 3886, thereby turning the filter screen 386. The overturning mechanism 388 is ingenious and reasonable in design, a power source is not required to be provided independently, and the overturning of the filter screen 386 can be achieved by means of the power of the driving device 387.

In one embodiment, the liquid inlet end of the tube 3811 is provided with a reducer 389 located above the filter screen 386, the outer peripheral surface of the upper end of the reducer 389 is in sealing engagement with the inner peripheral surface of the tube 3811, and preferably the upper end of the reducer 389 is threadedly connected to the tube 3811. The size of the lower end of reducer 389 is smaller than the size of filter screen 386, specifically, when filter screen 386 is located directly below reducer 389, the orthographic projection of the lower end of reducer 389 onto filter screen 386 is located within filter screen 386. Thus, the filter screen 386 is not required to be sized to accommodate the inner diameter of the tube portion 3811, and the percolate in the second return line 37 can pass entirely through the filter screen 386, thereby ensuring the filtering effect on the impurities in the percolate.

In one embodiment, the evaporation plate 35 includes a bottom 351 and a flange 352 extending upwardly from the bottom 351, the evaporation plate 35 being generally basin-shaped, and the first return line 36 being in communication with the bottom 351. After the percolate sprayed from the spray nozzles 34 is sprayed onto the evaporation plate 35, the percolate directly flows back to the collection tank 31 from the bottom 351 of the evaporation plate 35 through the first liquid return pipeline 36, does not splash to other parts of the cooling chamber 12 around, and simultaneously facilitates the collection of the percolate.

In one embodiment, the bottom 351 has a plurality of reservoirs 353 recessed downwardly. Since the temperature of the flue gas discharged from the main flue gas pipe 41 is controlled to be 40-80 c, and since the components in the garbage are different, the heat value is different, when the temperature of the flue gas discharged from the flue gas outlet 111 of the reaction chamber 11 suddenly increases at a certain moment, the evaporation plate 35 is rapidly heated, at this moment, the percolate remained in the liquid storage tank 353 is evaporated, thereby absorbing part of the heat, and then the nozzle 34 can spray a certain amount of percolate under the control of the electric control cabinet. The partial heat absorbed by the percolate remaining in the tank 353 before the nozzle 34 ejects the percolate avoids the problem of the nozzle 34 responding to the excessive temperature of the front part of the fumes.

The working principle of the utility model is as follows:

after the garbage is put into the furnace body 10 through the feeding system, the generated percolate flows into the effusion chamber 13 through the percolate collecting hole 112 and the percolate collecting cavity 113, then returns into the collecting tank 31 through the second liquid return pipeline 37, the percolate is filtered by the filtering device 38 before flowing back into the collecting tank 31, so that the granular impurities in the percolate are removed, the impurities filtered by the filtering device 38 are finally collected into the collecting tank, and then the impurities in the collecting tank are subjected to subsequent treatment. The percolate in the collecting tank 31 is sprayed onto the evaporating plate 35 through the liquid inlet pipeline 33 by the circulating pump 32, so that the evaporating plate 35 is cooled, the heat of the flue gas is absorbed, and the temperature of the flue gas is reduced. Part of the percolate is evaporated and enters the main smoke exhaust pipe 41 together with the smoke, the electrostatic dust collector 43 captures dust in the smoke at the top of the main smoke exhaust pipe 41, the captured dust falls into the dust box 45 under the gravity, and part of the percolate mixed in the dust flows back into the collecting tank 31 through the return pipe 46. The percolate, which is not evaporated to gas by the evaporation plate 35, is still returned in liquid form via the first return line 36 into the collection tank 31.

In the description of the present utility model, numerous specific details are set forth. However, it is understood that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.

Claims

1. A magnetizing degradation furnace, which is characterized in that: comprising the following steps:

the furnace body (10) comprises a reaction chamber (11), a cooling chamber (12) and a effusion chamber (13) which are respectively arranged above the reaction chamber (11), wherein the reaction chamber (11) is communicated with the cooling chamber (12) through a smoke outlet (111) arranged at the top of the reaction chamber, a heat preservation layer is arranged outside the reaction chamber (11), a percolate collecting cavity (113) is formed between the reaction chamber (11) and the heat preservation layer, a percolate collecting hole (112) is formed in the inner wall of the reaction chamber (11), and the percolate collecting hole (112) is communicated with the effusion chamber (13) through the percolate collecting cavity (113);

the percolate circulation treatment system (30) comprises a collection tank (31), a circulation pump (32), a liquid inlet pipeline (33), an evaporation plate (35), a first liquid return pipeline (36) and a second liquid return pipeline (37), wherein the collection tank (31) is arranged below the furnace body (10), the circulation pump (32) is arranged on the collection tank (31), one end of the liquid inlet pipeline (33) is connected with the circulation pump (32), the other end of the liquid inlet pipeline (33) is positioned in the cooling chamber (12) and is provided with a nozzle (34) at a liquid outlet, the evaporation plate (35) is arranged in the cooling chamber (12) and is positioned above the smoke outlet (111), the nozzle (34) is aligned with the evaporation plate (35), two ends of the first liquid return pipeline (36) are respectively communicated with the cooling chamber (12) and the collection tank (31), and two ends of the second liquid return pipeline (37) are respectively communicated with the liquid accumulation chamber (13) and the collection tank (31); and

the flue gas treatment system (40) comprises a flue gas exhaust branch pipe (42) and a flue gas exhaust main pipe, wherein two ends of the flue gas exhaust branch pipe (42) are respectively communicated with the cooling chamber (12) and the flue gas exhaust main pipe;

the second liquid return pipeline (37) is provided with a filter device (38), and the filter device (38) comprises:

a housing (381) having a pipe portion (3811) provided in a longitudinal direction for allowing the percolate to pass therethrough, and having a slag discharge port (3812) provided in a downward opening at the other end thereof;

a recovery box (382) detachably provided at the other end of the housing (381) and located directly below the slag discharge port (3812);

a drive shaft (383) rotatably provided in the longitudinal direction on the housing (381);

a fixed bracket (384) sleeved on the drive shaft (383);

a plurality of movable brackets (385) which are arranged around the circumference of the driving shaft (383) and one ends of which are rotatably connected with the fixed brackets (384);

a filter screen (386) arranged at the other end of the movable bracket (385);

a driving device (387) for intermittently driving the driving shaft (383) to rotate so as to make the filter screen (386) move back and forth at a position located in the pipe portion (3811) and at a position directly above the slag discharge port (3812); and

a turnover mechanism (388) for turning over the filter screen (386) at the slag discharge port (3812) to pour impurities located in the filter screen (386) into the recovery tank (382) through the slag discharge port (3812);

the upper end of the smoke exhaust manifold is provided with an electrostatic dust collection device (43), the lower end of the smoke exhaust manifold is provided with a dust collection box (45), the dust collection box (45) is provided with a water leakage hole (451), the lower end of the smoke exhaust manifold is communicated with the collecting tank (31) through a return pipe (46), and the return pipe (46) is used for guiding water leaked from the water leakage hole (451) to the collecting tank (31).

2. A magnetizing degrading furnace according to claim 1, wherein: the tilting mechanism (388) includes:

a sub-bracket (3881) provided at one end of the fixing bracket (384) near the slag discharge port (3812);

a rotating shaft (3882) rotatably arranged on the auxiliary bracket (3881);

a cylindrical gear (3883) and a first bevel gear (3884) coaxially sleeved on the rotating shaft (3882);

an arc-shaped rack (3885) arranged in the shell (381) and capable of being meshed with the cylindrical gear (3883); and

and the second bevel gear (3886) is sleeved at the one end of the movable bracket (385) and meshed with the first bevel gear (3884).

3. A magnetizing degrading furnace according to claim 2, wherein: the liquid inlet end in the pipe part (3811) is provided with a reducer pipe (389) positioned above the filter screen (386), the outer peripheral surface of the upper end of the reducer pipe (389) is in sealing fit with the inner peripheral surface of the pipe part (3811), and the size of the lower end of the reducer pipe (389) is smaller than that of the filter screen (386).

4. A magnetizing degrading furnace according to any one of claims 1-3, characterized in that: the filter screen (386) is made of a hard material.

5. A magnetizing degrading furnace according to claim 1, wherein: the evaporation plate (35) comprises a bottom (351) and a flange (352) which is formed by extending upwards from the bottom (351), and the first liquid return pipeline (36) is communicated with the bottom (351).

6. A magnetizing degrading furnace as set forth in claim 5, wherein: the bottom (351) is provided with a plurality of liquid storage tanks (353) which are recessed downwards.