CN114278941A - Continuous feeding type coaxial plasma melting furnace system and process thereof - Google Patents

Abstract

The invention discloses a continuous feeding type coaxial plasma melting furnace system and a process thereof, and the system comprises a coaxial plasma melting furnace, a feeding system and a tail gas purification device, wherein the coaxial plasma melting furnace comprises a melting furnace body, a rotary supporting frame and a rotary driving mechanism, a feeding pipe and a tail gas outlet pipe are arranged on two sides of the melting furnace body, the melting furnace body is rotatably arranged on the rotary supporting frame through the feeding pipe and the tail gas outlet pipe and is driven to rotate by the rotary driving mechanism, the feeding system is connected with the feeding pipe, and the tail gas purification device is connected with the tail gas outlet pipe. The system has the advantages of simple structure, less maintenance, good volume reduction effect and high solidification and stability of the glass body.

Description

Continuous feeding type coaxial plasma melting furnace system and process thereof

Technical Field

The invention relates to a melting furnace and a process thereof, in particular to a continuous feeding type coaxial plasma melting furnace system and a process thereof, belonging to the technical field of solid waste treatment.

Background

The plasma melting treatment technology of solid waste utilizes the advantages of high temperature, high energy density and low oxidizing atmosphere of a plasma torch to quickly gasify and crack organic components in the solid waste into combustible synthetic gas, inorganic substances are melted at high temperature to form stable slag of vitreous bodies, and harmful components such as heavy metals are solidified in crystal lattices of the stable slag of the vitreous bodies. The plasma melting treatment technology has the advantages of high volume reduction ratio, stable product, small secondary pollution and the like, and is an advanced technology suitable for hazardous waste and low-medium-level waste disposal.

Plasma fusion furnaces are the heart of plasma fusion processing technology. The existing plasma melting furnace usually adopts a batch feeding mode, namely, a feeding hole is closed after feeding, the melting furnace starts to work, a slag discharging hole is opened again to discharge slag after waste materials in the furnace are treated, and the next treatment work is continuously repeated after the slag discharging is finished. This approach, while safe and reliable, has low processing power. To solve this problem, patent EP1533568B1 proposes a centrifugal melting furnace technology in which the lower half of the melting furnace is designed as a centrifugal rotating crucible and is integrated with a slag discharge system for discharging molten slag by centrifugal force rotating at high speed. The technology can realize continuous feeding treatment, but because a large number of rotatable parts are arranged in the melting furnace, the structure is complex, the maintenance workload is large, and the discharge amount of slag cannot be accurately controlled; another problem is that the slag tap is located at the bottom of the furnace, which brings a great risk to the dredging staff when the tap is blocked.

Disclosure of Invention

The invention aims to solve the technical problem of providing a continuous feeding type coaxial plasma melting furnace system and a process thereof, and realizing continuous feeding treatment of solid waste treatment by using a simple structure.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a continuous feeding type coaxial plasma melting furnace system is characterized in that: contain coaxial plasma melting furnace, charge-in system and tail gas cleanup unit, coaxial plasma melting furnace contains the melting furnace body, swivel bracket and rotary driving mechanism, the both sides of melting furnace body are provided with inlet pipe and tail gas outlet duct, the melting furnace body passes through the inlet pipe and the rotation of tail gas discharging pipe setting on swivel bracket and by the drive of swivel driving mechanism, charge-in system is connected with the inlet pipe, tail gas cleanup unit is connected with the tail gas outlet duct.

Further, the runing rest contains bottom plate, left side support and right side support, and left side support and right side support are vertical to be fixed at the bottom plate upside and the symmetry sets up the both sides at the bottom plate, and open the upper end of left side support has the through-hole that matches with the inlet pipe, and the inlet pipe passes through sealed bearing and rotates the setting in the through-hole of left side support upper end, and open the upper end of right side support has the through-hole that matches with the tail gas outlet duct, and the tail gas outlet duct passes through sealed bearing and rotates the setting in the through-hole of right side support upper end, and charge-in system and tail gas cleanup unit fix respectively on left side support and right side support.

Furthermore, the feeding pipe and the tail gas outlet pipe are symmetrically arranged on the side walls of two sides of the melting furnace body, and the feeding pipe and the tail gas outlet pipe are positioned on the same straight line.

Furthermore, the rotary driving mechanism adopts an air cylinder or a hydraulic cylinder, one end of the rotary driving mechanism is hinged with the bottom plate, and the other end of the rotary driving mechanism is hinged with the melting furnace body.

Furthermore, a slag discharge port is arranged on one side face of the melting furnace body, a movable door capable of being opened and closed is arranged on the slag discharge port, a slag receiving barrel is arranged below the slag discharge port, a movable trolley and a lifting driving mechanism are arranged on the lower side of the slag receiving barrel, the lower end of the slag receiving barrel is connected with the lifting driving mechanism and driven by the lifting driving mechanism to lift along the vertical direction, and the lifting driving mechanism is fixed on the movable trolley.

Further, the upper end of the melting furnace body is provided with a feeding hole and a plasma torch.

Further, feed system contains double-gate airlock feeding storehouse and screw breaker, and the lower extreme export in double-gate airlock feeding storehouse is connected with screw breaker one end upside feed inlet, and screw breaker's other end discharge gate inner wall rotates with the inlet pipe to be connected, and screw breaker's other end discharge gate outer wall is fixed on the runing rest.

Further, the tail gas purification device comprises a flue gas pipeline, a combustion chamber, a waste heat boiler and a bag-type dust remover, the system comprises a bottom ash conveyor, an HEPA high-temperature filter, a wet-type deacidification scrubber, a denitration device and a chimney, wherein one end inner wall of a flue gas pipeline is rotatably connected with a tail gas outlet pipe, one end outer wall of the flue gas pipeline is fixed on a rotary supporting frame, the other end of the flue gas pipeline is connected with a combustion chamber inlet, a combustion chamber outlet is connected with an air inlet of a waste heat boiler, a flue gas outlet of the waste heat boiler is connected with an air inlet of a bag-type dust remover, an air outlet of the bag-type dust remover is connected with an inlet of the HEPA high-temperature filter, an ash discharge port at the lower end of the waste heat boiler and an ash discharge port at the lower end of the bag-type dust remover are connected with the bottom ash conveyor, an outlet of the HEPA high-temperature filter is connected with an inlet of the wet-type deacidification scrubber, an outlet of the wet-type deacidification scrubber is connected with an inlet of a denitration device, and an outlet of the denitration device is connected with the chimney.

Furthermore, the bag-type dust collector is composed of a main compartment and a standby compartment which are connected in series, and a filter bag in the bag-type dust collector is a PTFE (polytetrafluoroethylene) membrane which is laminated on a glass fiber fabric by PTFE.

A fusion process of a continuous feed coaxial plasma fusion furnace system, comprising the steps of:

s1, feeding the low-level and medium-level waste into a plasma melting furnace through a feeding system, and stacking to form a material bed;

s2, starting the plasma torch, working in a non-transferred arc operation mode, spraying the generated high-temperature plasma flame into the plasma melting furnace, and heating and melting the material bed;

s3, when the conductivity of the molten pool is increased enough to pass the arc current, the operation mode is switched to a transfer mode, and the power is increased to rapidly and completely melt the waste;

s4, putting the glass base materials through the feeding hole, and uniformly mixing the glass base materials in the melting pool under the stirring of plasma flame to help quickly form a glass body;

s5, after the waste is fully melted, the rotary driving mechanism pushes the melting furnace body to incline; the slag receiving barrel rises and is hermetically connected with the slag discharging port so as to ensure that the slag does not pollute the environment when being poured; opening a movable door, discharging the slag, and collecting the slag by using a slag receiving barrel; after the collection is finished, the slag receiving barrel descends, the movable door is closed, and the rotary driving mechanism pulls the melting furnace body to return to the horizontal position;

s6, feeding continuously by a feeding system to realize continuity of the melting process;

and S7, and the flue gas generated in the steps S2 and S3 is discharged through a chimney after being treated by the tail gas purification device.

Compared with the prior art, the invention has the following advantages and effects:

1. the feeding system, the melting furnace and the flue gas outlet are designed in a coaxial mode, the operation of feeding and slag dumping can be completed simultaneously, the structure is simple, the operation is safe, and continuous feeding can be realized; the slag discharge port is arranged below the side of the melting furnace, and slag is poured through the inclination of the melting furnace, so that the problems that the slag discharge port is arranged below the melting furnace and is easy to block and dredging personnel face high risk are solved;

2. the plasma melting treatment process can treat unclassified low-medium-level waste, and greatly reduces the pretreatment cost and risk of the low-medium-level waste; the volume reduction ratio is up to more than 95 percent, so that the radionuclide is solidified and stabilized in the vitreous body, and a large amount of low-medium waste storage space is saved; the generated flue gas is purified by the tail gas purification device provided by the invention, and the requirements of the emission standard of atmospheric pollutants are completely met.

Drawings

FIG. 1 is a schematic view of the melting system of the continuous feed coaxial plasma melter system of the present invention.

FIG. 2 is a schematic view of a coaxial plasma melting furnace of the present invention.

Fig. 3 is a side view of the coaxial plasma-melting furnace of the present invention.

Detailed Description

To elaborate on technical solutions adopted by the present invention to achieve predetermined technical objects, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, it is obvious that the described embodiments are only partial embodiments of the present invention, not all embodiments, and technical means or technical features in the embodiments of the present invention may be replaced without creative efforts, and the present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

As shown in fig. 1, the continuous feeding type coaxial plasma melting furnace system of the present invention comprises a coaxial plasma melting furnace 1, a feeding system 2 and a tail gas purification device, as shown in fig. 2 and 3, the coaxial plasma melting furnace 1 comprises a melting furnace body 3, a rotary support frame and a rotary driving mechanism 4, a feeding pipe 5 and a tail gas outlet pipe 6 are arranged at two sides of the melting furnace body 3, the melting furnace body 3 is rotatably arranged on the rotary support frame through the feeding pipe 5 and the tail gas discharging pipe 6 and is driven to rotate by the rotary driving mechanism 4, the feeding system 2 is connected with the feeding pipe 5, and the tail gas purification device is connected with the tail gas outlet pipe 6. The feeding system 2 and the tail gas purification device are both fixed on the rotary supporting frame, so that when the melting furnace body 3 rotates around the rotation center to topple over, the feeding system 2 and the tail gas purification device are fixed on the rotary supporting frame to be kept immovable, and the purpose of continuous feeding is achieved.

Slewing bearing contains bottom plate 7, left side support 8 and right side support 9 are vertical to be fixed at 7 upsides of bottom plate and the symmetry sets up the both sides at bottom plate 7, open the through-hole that has and match with inlet pipe 5 in the upper end of left side support 8, inlet pipe 5 rotates through sealed bearing and sets up in the through-hole of 8 upper ends of left side support, open the upper end of right side support 9 has the through-hole that matches with tail gas outlet duct 6, tail gas outlet duct 6 rotates through sealed bearing and sets up in the through-hole of 9 upper ends of right side support, charge-in system 2 and tail gas cleanup unit fix respectively on left side support 8 and right side support 9. The feeding pipe 5 and the tail gas outlet pipe 6 are symmetrically arranged on the side walls of two sides of the melting furnace body 3, and the feeding pipe 5 and the tail gas outlet pipe 6 are positioned on the same straight line.

The rotary driving mechanism 4 adopts an air cylinder or a hydraulic cylinder, one end of the rotary driving mechanism 4 is hinged with the bottom plate 7, and the other end of the rotary driving mechanism 4 is hinged with the lower side of the melting furnace body 3. When the rotary driving mechanism 4 extends, the melting furnace body 3 rotates along the feeding pipe 5 and the tail gas outlet pipe 6 and the rotation center of the rotary supporting frame, so that slag discharge is completed, and when slag discharge is performed, the feeding system 2 and the tail gas treatment system are fixed and are not affected, so that the feeding and tail gas exhaust can be performed in the slag discharge process, and continuous treatment is realized.

The melting furnace body consists of a top cover and a main body. Wherein the top cover is constructed from a monolithic refractory material by a mold frame. The lower part in the main body is bowl-shaped or spherical, and magnesia-chrome brick (MgO-Cr) is adopted₂O₃) The brick is used as a fireproof material, and a magnesia carbon refractory (MgO-C) is used as a filling material inserted into the bottom of the melting furnace close to the working area of the electrode. The main body is a double-layer water-cooling sealing structure, and the outer surface of the melting furnace body 3 is kept at a proper temperature lower than 60 ℃ while the sealing is ensured. A slag discharging port 10 is arranged on one side surface of the melting furnace body 3, a movable door capable of being opened and closed is arranged on the slag discharging port 10, a slag receiving barrel 11 is arranged below the slag discharging port 10, a movable trolley 13 and a lifting driving mechanism 12 are arranged on the lower side of the slag receiving barrel 11, the lower end of the slag receiving barrel 11 is connected with the lifting driving mechanism 12 and driven by the lifting driving mechanism 12 to lift along the vertical direction, and the lifting driving mechanism 12 is fixed on the movable trolley 13. The movable trolley 13 can transfer and move the slag receiving barrel 11, and the lifting driving mechanism adopts an air cylinder or a hydraulic cylinder to lift the slag receiving barrel 11 so as to be better matched with the slag discharging port 10. The slag discharge port 10 of the melting furnace body 3 is designed as a bell mouth to avoid melting when the melting furnace body 3 operatesThe slag solidification blocks the slag discharge port 10, and a moving door lined with refractory material is installed at the slag discharge port end, and is closed during operation and opened through a control device during slag dumping.

The upper end of the melting furnace body 3 is provided with a feed inlet 14 and a plasma torch 15. The plasma torch 15 is inserted into the melting furnace body 3 from the top thereof and has a certain inclination (20 degrees to 45 degrees). The outer tube of the plasma torch 15 is coated with refractory material, air is used as working gas, the plasma torch 15 can be switched from a non-transfer mode to a transfer mode according to the type of combustible or non-combustible waste, and the plasma torch is controlled by a mechanical arm and can freely move along with the rotation of the melting furnace body 3. The inlet 14 of the melting furnace body 3 has a diameter of about 20 cm and is used for treating other dispersion-type waste or adding a glass substrate.

The feeding system 2 comprises a double-gate airlock feeding bin 16 and a screw type crusher 17, the lower end outlet of the double-gate airlock feeding bin 16 is connected with the upper side feeding port at one end of the screw type crusher 17, the inner wall of the other end discharging port of the screw type crusher 17 is rotatably connected with the feeding pipe 5, and the outer wall of the other end discharging port of the screw type crusher 17 is fixed on a rotating supporting frame. All the parts are hermetically connected, and the screw crusher 17 is hermetically connected with a rotating support frame and used for safely feeding hazardous waste or low-medium-level waste into the melting furnace. The feeding system 2 works in a micro-negative pressure state, the double-gate air-lock type feeding bin 16 can ensure that the whole feeding process is in a sealed state, and the screw type crusher 17 can crush bagged wastes or barreled wastes and push the wastes to be fed into the melting furnace body 3 through the feeding pipe 5.

The tail gas purification device comprises a flue gas pipeline 18, a combustion chamber 19, a waste heat boiler 20, a bag-type dust remover 21, a bottom ash conveyor 22, an HEPA high-temperature filter 23, a wet deacidification scrubber 24, a denitration device 25 and a chimney 26, wherein the inner wall of one end of the flue gas pipeline 18 is rotatably connected with a tail gas outlet pipe 6, the outer wall of one end of the flue gas pipeline 18 is fixed on a rotary support frame, the other end of the flue gas pipeline 18 is connected with an inlet of the combustion chamber 19, an outlet of the combustion chamber 19 is connected with an air inlet of the waste heat boiler 20, a flue gas outlet of the waste heat boiler 20 is connected with an air inlet of the bag-type dust remover 21, an air outlet of the bag-type dust remover 21 is connected with an inlet of the HEPA high-temperature filter 23, an ash discharge port at the lower end of the waste heat boiler 20 and an ash discharge port at the lower end of the bag-type dust remover 21 are connected with the bottom ash conveyor 22, an outlet of the HEPA high-temperature filter 23 is connected with an inlet of the wet deacidification scrubber 24, an outlet of the wet deacidification scrubber 24 is connected with an inlet of the denitration device 25, the outlet of the knock-out device 25 is connected to a chimney 26.

The bag-type dust collector 21 is composed of a main compartment and a standby compartment which are connected in series, and a filter bag in the bag-type dust collector adopts a PTFE film formed by laminating PTFE on a glass fiber fabric, so that the bag-type dust collector can bear the working temperature of 260 ℃.

A fusion process of a continuous feed-type coaxial plasma fusion furnace system, comprising the steps of:

s1, feeding the low-level and medium-level waste into a plasma melting furnace through a feeding system, and stacking to form a material bed;

s2, starting the plasma torch, working in a non-transferred arc operation mode, spraying the generated high-temperature plasma flame into the plasma melting furnace, and heating and melting the material bed;

s3, when the conductivity of the molten pool is increased enough to pass the arc current, the operation mode is switched to a transfer mode, and the power is increased to rapidly and completely melt the waste;

s4, putting the glass base materials through the feeding hole, and uniformly mixing the glass base materials in the melting pool under the stirring of plasma flame to help quickly form a glass body;

s5, after the waste is fully melted, the rotary driving mechanism pushes the melting furnace body to incline; the slag receiving barrel rises and is hermetically connected with the slag discharging port so as to ensure that the slag does not pollute the environment when being poured; opening a movable door, discharging the slag, and collecting the slag by using a slag receiving barrel; after the collection is finished, the slag receiving barrel descends, the movable door is closed, and the rotary driving mechanism pulls the melting furnace body to return to the horizontal position;

s6, feeding continuously by a feeding system to realize continuity of the melting process;

and S7, and the flue gas generated in the steps S2 and S3 is discharged through a chimney after being treated by the tail gas purification device.

When the treatment process works, the pressure in the plasma melting furnace body 3 is slightly negative pressure. An induction heater may be installed near the slag discharge port 10 of the plasma melting furnace body 3 to prevent the molten material from condensing to block the outlet.

The treatment process of the tail gas purification device in the step S7 is as follows:

1) the temperature of combustible flue gas discharged from the plasma melting furnace body is up to 1200 ℃, the combustible flue gas is discharged to a combustion chamber through a flue gas pipeline, the combustible flue gas is completely oxidized and combusted to form flue gas, and then the flue gas is sent to a waste heat boiler to be cooled;

2) the cooled flue gas enters a bag-type dust collector and is filtered through the surface of a membrane filter bag to capture particles; the flue gas then enters a HEPA high-temperature filter to remove fine particles in the flue gas;

3) the flue gas after dust removal further absorbs acid, gaseous pollutants, sulfur dioxide and the like in the flue gas through a wet deacidification scrubber;

4) after the temperature of the flue gas is raised, NOx is removed in a DENOX denitration system in a catalytic mode and then the flue gas is discharged into the atmospheric environment through a chimney.

The continuous feeding type coaxial plasma melting furnace system for treating hazardous waste or low-medium-level waste is simple in structure and maintenance, has no other moving parts except for the rotating shaft, and can realize continuous feeding and continuous slag discharge; the corresponding treatment process can ensure that the radionuclide is solidified and stabilized in the vitreous body, thereby realizing the maximum volume reduction of low-level and medium-level radioactive wastes and greatly reducing the disposal and storage space; the generated flue gas is treated by the tail gas purification device, and completely meets the requirements of the emission standard of atmospheric pollutants.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A continuous feeding type coaxial plasma melting furnace system is characterized in that: contain coaxial plasma melting furnace, charge-in system and tail gas cleanup unit, coaxial plasma melting furnace contains the melting furnace body, swivel bracket and rotary driving mechanism, the both sides of melting furnace body are provided with inlet pipe and tail gas outlet duct, the melting furnace body passes through the inlet pipe and the rotation of tail gas discharging pipe setting on swivel bracket and by the drive of swivel driving mechanism, charge-in system is connected with the inlet pipe, tail gas cleanup unit is connected with the tail gas outlet duct.

2. A continuous feed coaxial plasma melter system as set forth in claim 1 wherein: rotatory supporting rack contains the bottom plate, left side support and right side support are vertical to be fixed at the bottom plate upside and the symmetry sets up the both sides at the bottom plate, open the upper end of left side support has the through-hole that matches with the inlet pipe, the inlet pipe rotates through sealed bearing and sets up in the through-hole of left side support upper end, open the upper end of right side support has the through-hole that matches with the tail gas outlet duct, the tail gas outlet duct rotates through sealed bearing and sets up in the through-hole of right side support upper end, charge-in system and tail gas cleanup unit fix respectively on left side support and right side support.

3. A continuous feed coaxial plasma melter system as set forth in claim 1 wherein: the feeding pipe and the tail gas outlet pipe are symmetrically arranged on the side walls of two sides of the melting furnace body, and the feeding pipe and the tail gas outlet pipe are positioned on the same straight line.

4. A continuous feed coaxial plasma melter system as set forth in claim 2 wherein: the rotary driving mechanism adopts an air cylinder or a hydraulic cylinder, one end of the rotary driving mechanism is hinged with the bottom plate, and the other end of the rotary driving mechanism is hinged with the melting furnace body.

5. A continuous feed coaxial plasma melter system as set forth in claim 1 wherein: the slag tapping device is characterized in that a slag tapping hole is formed in one side face of the melting furnace body, a movable door capable of being opened and closed is arranged on the slag tapping hole, a slag receiving barrel is arranged below the slag tapping hole, a movable trolley and a lifting driving mechanism are arranged on the lower side of the slag receiving barrel, the lower end of the slag receiving barrel is connected with the lifting driving mechanism and driven by the lifting driving mechanism to lift along the vertical direction, and the lifting driving mechanism is fixed on the movable trolley.

6. A continuous feed coaxial plasma melter system as set forth in claim 1 wherein: the upper end of the melting furnace body is provided with a feeding hole and a plasma torch.

7. A continuous feed coaxial plasma melter system as set forth in claim 1 wherein: the feed system contains double-gate airlock feeding storehouse and screw breaker, and the lower extreme export in double-gate airlock feeding storehouse is connected with screw breaker one end upside feed inlet, and screw breaker's other end discharge gate inner wall rotates with the inlet pipe to be connected, and screw breaker's other end discharge gate outer wall is fixed on the rotating support frame.

8. A continuous feed coaxial plasma melter system as set forth in claim 1 wherein: the tail gas purification device comprises a flue gas pipeline, a combustion chamber, a waste heat boiler, a bag-type dust remover, a bottom ash conveyor, an HEPA high-temperature filter, a wet-type deacidification scrubber, a denitration device and a chimney, the one end inner wall and the tail gas outlet duct of flue gas pipeline rotate to be connected, the one end outer wall of flue gas pipeline is fixed on rotatory supporting rack, the flue gas pipeline other end and combustion chamber entry linkage, the combustion chamber export is connected with the exhaust-heat boiler air inlet, exhaust-heat boiler flue gas export is connected with the air inlet of sack cleaner, the gas outlet of sack cleaner and HEPA high temperature filter's access connection, exhaust-heat boiler lower extreme ash discharge mouth and sack cleaner lower extreme ash discharge mouth are connected with end ash conveyer, HEPA high temperature filter's export and the access connection of wet-type deacidification scrubber, the export of wet-type deacidification scrubber and the access connection of taking off the round pin device, the export and the chimney of taking off the round pin device are connected.

9. A continuous feed coaxial plasma melter system as set forth in claim 8 wherein: the bag-type dust collector comprises a main compartment and a standby compartment, the main compartment and the standby compartment are connected in series, and a filter bag in the bag-type dust collector is a PTFE (polytetrafluoroethylene) membrane laminated on a glass fiber fabric by PTFE.

10. A melting process for a continuous feed coaxial plasma melter system as set forth in any of claims 1-9 comprising the steps of:

s1, feeding the low-level and medium-level waste into a plasma melting furnace through a feeding system, and stacking to form a material bed;

s2, starting the plasma torch, working in a non-transferred arc operation mode, spraying the generated high-temperature plasma flame into the plasma melting furnace, and heating and melting the material bed;

s3, when the conductivity of the molten pool is increased enough to pass the arc current, the operation mode is switched to a transfer mode, and the power is increased to rapidly and completely melt the waste;

s4, putting the glass base materials through the feeding hole, and uniformly mixing the glass base materials in the melting pool under the stirring of plasma flame to help quickly form a glass body;

s5, after the waste is fully melted, the rotary driving mechanism pushes the melting furnace body to incline; the slag receiving barrel rises and is hermetically connected with the slag discharging port so as to ensure that the slag does not pollute the environment when being poured; opening a movable door, discharging the slag, and collecting the slag by using a slag receiving barrel; after the collection is finished, the slag receiving barrel descends, the movable door is closed, and the rotary driving mechanism pulls the melting furnace body to return to the horizontal position;

s6, feeding continuously by a feeding system to realize continuity of the melting process;

and S7, and the flue gas generated in the steps S2 and S3 is discharged through a chimney after being treated by the tail gas purification device.

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