CN111059898A

CN111059898A - Triangular plasma melting furnace

Info

Publication number: CN111059898A
Application number: CN201911347859.9A
Authority: CN
Inventors: 张俊杰; 布杨耶夫; 马腾才
Original assignee: Lixuan Technology Shanghai Co Ltd
Current assignee: Lixuan Technology Shanghai Co Ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-04-24

Abstract

The triangular plasma smelting furnace includes one triangular reaction chamber with bottom, side walls and cover, material feeder and melt leading-out equipment, rod-shaped electrodes inside the reaction chamber, closed magnetic yoke electromagnet around the reaction chamber and with three symmetrically distributed magnetic pole joints with serially connected coils to produce transverse magnetic field, and each coil has one end connected to the corresponding electrode and the other end connected to power source, and the rod-shaped electrodes inside the reaction chamber are installed parallelly to the longitudinal axis of the reaction chamber and distributed in the same distance to the longitudinal axis and form 120 deg angle with each other. The invention heats the solution and the slag hole, and can continuously or periodically pour out a certain dosage of solution flow to further process to manufacture rock wool or refractory material.

Description

Triangular plasma melting furnace

Technical Field

The present invention belongs to the field of electrothermal melting technology, and is especially one triangular plasma smelting furnace for smelting ore material and chemical reaction in condensed state, especially for smelting ash, slag, chemical and other organic or inorganic waste in garbage power plant to produce heat insulating material.

Background

The existing plasma melting furnace reactor has the following defects: the solution and tap hole cannot be heated supplementarily because of the lack of heating function. Therefore, the stability and certain fluidity of the solution flowing out can not be ensured, and the quality of the fibrous heat-insulating material can not be improved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a triangular plasma melting furnace which is simple in structure and can continuously perform supplementary heating on a solution and a slag hole so as to obtain a high-quality fibrous material.

In order to realize the purpose, the invention is realized by adopting the following technical scheme: a triangular plasma melter includes a reaction chamber having a bottom, side walls and a lid. The device comprises a batch feeder and a melt-leading-out device, wherein the reaction chamber is triangular, a rod-shaped electrode is arranged in the reaction chamber, and the rod-shaped electrode is communicated and fixed with a cover through a seat frame; the reaction chamber is surrounded by a closed magnetic yoke electromagnet with three symmetrically distributed magnetic pole joints on which series coils are arranged, which can generate a transverse magnetic field after being electrified, one end of each coil is connected with a corresponding electrode, the other end is connected with a power supply, rod-shaped electrodes in the reaction chamber are arranged in parallel to the longitudinal axis of the reaction chamber, are distributed at the same distance from the longitudinal axis and form an angle of 120 degrees with each other, and the power supplies are three adjustable silicon controlled power supplies which work in an electrified state.

The triangular plasma melting furnace is characterized in that: the reaction chamber is provided with a rod-shaped auxiliary electrode which is arranged in the center of the reaction chamber along the longitudinal axis and can move up and down, so that the auxiliary electrode can be lifted up or down, and when the auxiliary electrode is lowered down, the hollow space on the device for leading out the molten liquid is closed, and the molten liquid is heated additionally.

The triangular plasma melting furnace is characterized in that: the device for leading out the melt is arranged on the central position of the bottom of the reaction chamber and is composed of a melt leading-out port arranged on a seat frame; the melt outlet is provided with a water-cooled shell and is fixed by a pressure plate. The current in a circuit consisting of an additional power supply and the flow guide port can be regulated and controlled by changing the current flowing through the melt between the auxiliary electrode and the melt flow guide port, so that the heating temperature of the flow guide port and the melt flow flowing out of the flow guide port can be regulated and controlled; therefore, the stable fluidity of the melt flow from the diversion port can be adjusted by the aid of an additional direct-current power supply.

The triangular plasma melting furnace is characterized in that: the seat frame is made of electrode graphite, and the flow guide port is made of siliconized compact graphite. In addition, the seat frame and the diversion opening are coated with a layer of zirconium dioxide containing wear-resistant and fire-resistant components.

The triangular plasma melting furnace is characterized in that: the bottom of the reaction chamber is provided with a lining built by chrome-magnesium refractory bricks, and the lining inclines from the inner wall of the reactor to the center of the bottom.

The present invention can heat the solution and slag hole for further processing, and may be used in producing rock wool and various refractory materials.

Drawings

FIG. 1 is a top view of the present invention.

Fig. 2 is a side view of the present invention.

1. Reaction chamber, 2, bottom, 3, side wall, 4, cover, 5, feeder, 6, melt extraction equipment, 7, rod-shaped electrode, 8, magnet yoke electromagnet, 9, magnetic pole connector, 10, series coil, 11, power supply, 12, auxiliary electrode, 13, melt extraction outlet, 14, water-cooled shell, 15, pressing plate, 16, seat frame, 17 and lining.

Detailed Description

The invention is explained below with the aid of the figures:

a triangular plasma melter includes a reaction chamber having a bottom, side walls and a lid. The device comprises a batch feeder and a melt-leading-out device, wherein the reaction chamber is triangular, a rod-shaped electrode is arranged in the reaction chamber, and the rod-shaped electrode is communicated and fixed with a cover through a seat frame; the reaction chamber is surrounded by a closed magnetic yoke electromagnet with three symmetrically distributed magnetic pole joints on which series coils are arranged, which can generate a transverse magnetic field after being electrified, one end of each coil is connected with a corresponding electrode, the other end is connected with a power supply, rod-shaped electrodes in the reaction chamber are arranged in parallel to the longitudinal axis of the reaction chamber, are distributed at the same distance from the longitudinal axis and form an angle of 120 degrees with each other, and the power supplies are three adjustable silicon controlled power supplies which work in an electrified state.

The triangular plasma melting furnace is characterized in that: the device for leading out the melt is arranged on the central position of the bottom of the reaction chamber and is composed of a melt leading-out port arranged on a seat frame; the melt leading-out port is provided with a water-cooled shell and is fixed by a pressing plate; by changing the current flowing through the melt between the auxiliary electrode and the melt diversion port, the current in the circuit formed by the additional power supply and the diversion port can be regulated, thereby regulating the heating temperature of the diversion port and the melt flow flowing out of the diversion port. Therefore, the stable fluidity of the melt flow from the diversion port can be adjusted by the aid of an additional direct-current power supply.

The triangular plasma melting furnace is characterized in that: the seat frame is made of electrode graphite, and the flow guide port is made of siliconized compact graphite; in addition, the seat frame and the diversion opening are coated with a layer of zirconium dioxide containing wear-resistant and fire-resistant components.

The triangular plasma melting furnace is characterized in that: the side wall of the reaction chamber is made of a non-magnetic material stainless steel plate, and the outer wall of the reaction chamber is provided with an insulated water cooling shell; regulating and controlling a valve on the main water collecting tank, and respectively injecting cooling water from the lower part by a hose; the bottom and the cover of the reaction chamber are respectively provided with two water inlet pipes and a water outlet pipe.

The triangular plasma melting furnace works according to the following steps:

and (3) feeding crushed materials, namely the grinding materials with the particle size of 5-8 mm, into the reaction chamber through a pipeline of the feeding port. First, a flat layer of small particles of a conductive material in a coagulated state is formed between the surface layers of small solid waste (hazardous waste) particles in the central part of the reaction chamber. For example, graphite powder is used which can turn on three rod-shaped electrodes. Then three controllable silicon power supplies which can be regulated are switched on, and then current is conducted to penetrate through the graphite layer to heat the graphite layer. And transferring the heat generated by the current to the abrasive body connected to the graphite layer, and finally forming a working molten pool in the reaction chamber.

In order to remove the melt from the reaction chamber, the additional fixed rod-shaped electrode is lifted, the hole on the diversion opening is opened, and when the fluidity of the solution is enough to ensure that the solution flowing out of the diversion opening can flow freely, the additional fixed rod-shaped electrode is stopped at a slightly lifted position in the solution in the reaction chamber. If the melt flow can not freely flow out of the flow guide opening, the additional fixed rod-shaped electrode is put down to seal the central hole of the flow guide opening. The molten pool is continuously heated by the main power supply.

If the molten liquid flow from the diversion opening changes diameter or is in an intermittent state in the process of pouring the solution from the reaction chamber, an additional fixed power supply is started, and current passes through a circuit formed by the additional fixed electrode, the solution and the diversion opening to supplement and heat the solution and the diversion opening. Therefore, the temperature, fluidity and viscosity of the melt flow flowing out of the guide holes installed in the solution pouring device of the reaction chamber are increased.

The experimental work shows that: the molten flow can only flow out stably when the normal temperature of the molten flow is 1400-1500 degrees, and a pyrometer and a thermocouple are arranged on a water cooling jacket seat frame provided with a flow guide port to determine the temperature of the molten flow; when the outflow of the molten flow reaches a steady state, the auxiliary power supply should be turned off; the no-load voltage is 140 volts and the current value can be adjusted from zero to 300 amps. The average time for collecting the solution in the reaction chamber is 25 to 35 minutes, the diameter of the diversion opening is 10 to 11 millimeters, and the time for pouring the solution is four to five minutes; 60 to 90 kg of melt can be tapped each time.

Claims

1. Triangular plasma melting furnace, including a reaction chamber, it is equipped with bottom, lateral wall and lid, feeder and draws the melt equipment, its characterized in that: the reaction chamber is triangular, a rod-shaped electrode is arranged in the reaction chamber, and the rod-shaped electrode is communicated and fixed with the cover through a seat frame; the reaction chamber is surrounded by a closed magnetic yoke electromagnet with three symmetrically distributed magnetic pole joints on which series coils are arranged, which can generate a transverse magnetic field after being electrified, one end of each coil is connected with a corresponding electrode, the other end is connected with a power supply, rod-shaped electrodes in the reaction chamber are arranged in parallel to the longitudinal axis of the reaction chamber, are distributed at the same distance from the longitudinal axis and form an angle of 120 degrees with each other, and the power supplies are three adjustable silicon controlled power supplies which work in an electrified state.

2. The triangular plasma melter of claim 1 wherein: the reaction chamber is provided with a rod-shaped auxiliary electrode which is arranged in the center of the reaction chamber along the longitudinal axis and can move up and down, so that the auxiliary electrode can be lifted up or down, and when the auxiliary electrode is lowered down, the hollow space on the device for leading out the molten liquid is closed, and the molten liquid is heated additionally.

3. The triangular plasma melter of claim 1 wherein: the device for leading out the melt is arranged on the central position of the bottom of the reaction chamber and is composed of a melt leading-out port arranged on a seat frame; the melt leading-out port is provided with a water-cooled shell and is fixed by a pressing plate; by changing the current flowing through the melt between the auxiliary electrode and the melt diversion port, the current in the circuit formed by the additional power supply and the diversion port can be regulated, thereby regulating the heating temperature of the diversion port and the melt flow flowing out of the diversion port.

4. The triangular plasma melter of claim 3 wherein: the seat frame is made of electrode graphite, the flow guide port is made of siliconized compact graphite, and in addition, a layer of zirconium dioxide containing wear-resistant and fire-resistant components is coated on the seat frame and the flow guide port.

5. The triangular plasma melter of claim 1 wherein: the bottom of the reaction chamber is provided with a lining built by chrome-magnesium refractory bricks, and the lining inclines from the inner wall of the reactor to the center of the bottom.

6. The triangular plasma melter of claim 1 wherein: the side wall of the reaction chamber is made of a non-magnetic material stainless steel plate, and the outer wall of the reaction chamber is provided with an insulated water cooling shell; regulating and controlling a valve on the main water collecting tank, and respectively injecting cooling water from the lower part by a hose; the bottom and the cover of the reaction chamber are respectively provided with two water inlet pipes and a water outlet pipe.

7. The triangular plasma melter of claims 1 through 6 wherein: the method is suitable for melting the grinding materials with the particle size of 5-8 mm; the melt flow can only flow out stably when the temperature of the melt flow is 1400 to 1500 ℃, the no-load voltage is 140V, and the current value can be adjusted to 300 amperes from zero; the diameter of the diversion opening is 10 to 11 millimeters.