CN212005699U

CN212005699U - Multi-electrode plasma melting furnace

Info

Publication number: CN212005699U
Application number: CN202020446231.6U
Authority: CN
Inventors: 杨以凡
Original assignee: Zhejiang Dafan Intelligent Technology Co ltd
Current assignee: Zhejiang Dafan Intelligent Technology Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-11-24
Anticipated expiration: 2030-03-31

Abstract

The utility model discloses a multi-electrode plasma melting furnace, which comprises a furnace body, a melting pool is arranged in the furnace body, the melting pool comprises at least two isolated heating zones which are arranged in a straight line, the bottoms of the heating zones are communicated with each other, at least one plasma torch is correspondingly arranged on each heating zone, each plasma torch is arranged along the radial direction of the melting pool, a feed inlet and a melting liquid discharge port are arranged on the furnace body, a feed device is connected on the feed inlet, a discharge device is detachably connected on the melting liquid discharge port, the top of the terminal heating zone is provided with a smoke hole, a rectangular melting pool and more than two plasma torches are used, a partition wall is arranged between the plasma torches, the heating process of fly ash melting and vitrification can be more effectively controlled, the heat efficiency is improved, the secondary fly ash amount is reduced, in addition, the detachable electric heating glass liquid discharge device, the manufacturing and maintenance cost of the equipment is reduced.

Description

Multi-electrode plasma melting furnace

Technical Field

The utility model relates to a solid waste innocent treatment technical field specifically is a multi-electrode plasma melting furnace and processing method.

Background

At present, the annual treatment capacity of domestic garbage in China is more than 20000 ten thousand tons, approximately 50 percent of domestic garbage is treated by a treatment method of incineration power generation, the fly ash production amount of an incinerator is about 3 to 5 percent of the amount of garbage entering the incinerator, 4 percent of the fly ash production amount is calculated, and the fly ash amount required to be treated every year reaches more than 400 ten thousand tons.

The incineration fly ash is used as hazardous waste, the content of dioxin and heavy metal is high, and the treatment technology is widely concerned by people. The main treatment mode at present is that the fly ash is chelated and stabilized and enters a dangerous waste safe landfill for disposal, the treatment mode has high cost, large land resources are needed, and the problem cannot be solved fundamentally, so that the search for a technology which can reduce the volume of ash slag, effectively remove toxicity and recycle the treated product becomes an urgent task.

The plasma high-temperature melting technology is that the waste incineration fly ash is melted into liquid at the high temperature of more than 1300 ℃, then the liquid slag is treated by air cooling or water quenching to generate glassy slag, organic pollutants such as dioxin in the fly ash are decomposed and destroyed by heating, and heavy metals in the fly ash are effectively dissolved in the glassy slag in a solid solution mode. After the incineration fly ash is melted, the density is greatly increased, the volume reduction can reach more than 2/3, and the stable slag can be used as a building material such as a roadbed and the like, so that the aim of effective utilization is fulfilled.

However, the problems of complex furnace body structure, poor stability, large power consumption, high operation and maintenance costs and the like of the plasma melting furnace seriously hinder the popularization and application of the technology, and therefore, a plasma melting furnace with stable performance, high energy efficiency and low operation cost is needed to be provided for fly ash treatment to solve the technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multi-electrode plasma melting furnace for solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a multi-electrode plasma melting furnace, includes the furnace body, be provided with the melting pond in the furnace body, the melting pond includes that at least two are the isolation zone of heating of inline, and the bottom in each zone of heating communicates each other, corresponds on each zone of heating to be provided with an at least plasma torch, and each plasma torch is radially arranged along the melting pond, be provided with feed inlet and melt discharge gate on the furnace body, be connected with feed arrangement on the feed inlet, can dismantle on the melt discharge gate and be connected with discharging device, terminal zone of heating top is provided with the flue gas hole.

Preferably, the melting pool is of a rectangular structure, and the plasma torches are positioned at the top of the heating zone and are arranged along the length direction of the melting pool.

Preferably, the melt pool is divided into at least two heating zones by a partition wall, a melt channel is formed between the bottom of the partition wall and the bottom surface of the melt pool, the melt passes through the melt channel, and a gap is formed between the bottom of the partition wall and the melt.

Preferably, the height of the gap is 50 mm to 300 mm.

Preferably, the melt outlet is located below the melt level, and the top surface of the melt outlet is at least 6 mm lower than the melt level.

Preferably, an electric heating rod is arranged on the melt discharge port. The glass liquid is prevented from flowing out of the plasma melting furnace and being solidified.

Preferably, the furnace body comprises refractory bricks, an outer shell is arranged outside the refractory bricks, and a heat insulation material is filled between the outer shell and the outer walls of the refractory bricks.

Preferably, the furnace body comprises a lower cavity and a top cover arranged above the lower cavity.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a multi-electrode plasma melting furnace, with rectangular melting bath and the plasma torch more than two, there is the division wall between the plasma torch, can the heating process of more effective control flying dust melting and vitrification, the increasing heat efficiency reduces the secondary and flies the ash volume, in addition, detachable electrical heating glass liquid discharging device, simple structure, modularization degree are high, have reduced equipment manufacturing and maintenance cost.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic top view of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution:

a multi-electrode plasma melting furnace comprises a furnace body 100, wherein a melting pool is arranged in the furnace body, the melting pool comprises two linearly arranged isolated heating zones, the bottoms of the two heating zones are communicated with each other, a first plasma torch 120 and a second plasma torch 121 are respectively and correspondingly arranged on the two heating zones, a feed port and a molten liquid discharge port 116 are arranged on the furnace body, a feeding device 130 is connected to the feed port, a discharge device 118 is detachably connected to the molten liquid discharge port, and a flue gas hole is formed in the top of a tail heating zone; the furnace body comprises refractory bricks, a heat insulation material and a shell 110 from inside to outside in sequence; specifically, a shell is arranged outside the refractory brick, a heat insulation material 113 is filled between the shell and the outer wall of the refractory brick, the furnace body comprises a lower cavity 112 and a top cover 111 arranged above the lower cavity, the lower cavity forms the melting pool, and the split structure is convenient to install and maintain; the feed inlet is arranged on the left side of the top cover, the right side of the lower cavity is provided with a melt discharge port, the melt discharge port is positioned below the melt level, and the top surface of the melt discharge port is at least 6 millimeters lower than the melt level. Specifically, the melting tank is of a rectangular structure, the plasma torches are located at the top of the heating zones and are arranged along the length direction of the melting tank, the melting tank is divided into at least two heating zones by a partition wall 115, a melting liquid channel is formed between the bottom of the partition wall and the bottom surface of the melting tank, the melting liquid passes through the melting liquid channel, a gap is formed between the bottom of the partition wall and the liquid level 150 of the melting liquid, and the height of the gap is 50-300 mm; the top of the partition wall 115 is tightly fitted with the top cover 111. In order to solve the problems of heat preservation of a molten glass outlet and maintenance of a discharge port, a detachable electric heating discharge device is adopted, an electric heating rod 117 is arranged on the molten glass discharge port, and a silicon-molybdenum rod is preferably used as a heating element, so that the temperature of the discharge port can be accurately controlled, and the molten glass is prevented from being solidified before flowing out of a plasma melting furnace.

The working principle of this application does: the fly ash to be treated is fed into the molten pool by the feeding device 130, rapidly melted by the heating of the plasma torch 120 and flows towards the discharging device 118. The plasma torch 121 further heats the molten glass, so that the molten glass is further vitrified and homogenized, the effective solidification of the heavy metal by the glass body is ensured, the partition walls of the plasma torch 120 and the plasma torch 121 realize the separation of heating spaces, and the heating efficiency is improved. Meanwhile, the temperature of melting and vitrification of the fly ash can be effectively controlled by controlling the feeding amount and the power of the plasma torch, the vitrification process of the fly ash is controlled, and the melting disposal efficiency is improved. Meanwhile, the configuration of different molten pool sizes and plasma torch powers enables the melting furnace of the example to accommodate fly ash treatment capacities from several tons to 100 tons per day; secondly, the plasma torch 120 provides heat for the melting of the fly ash, the generated flue gas enters the right space through the gap between the partition wall 115 and the molten glass 150, the flue gas is mixed with the flue gas generated by the plasma torch 121 and then discharged from the flue gas hole 114 to enter a subsequent treatment system, and the partition wall 115 separates the melting working space, so that the dust removal of the flue gas is realized, and the secondary fly ash generated in the vitrification process is effectively reduced.

The water spraying cooling discharging device 140 capable of cooling and solidifying the molten glass rapidly is additionally arranged, the cold water sprayed by the cooling water nozzle 141 enables the molten glass to be cooled and solidified rapidly, inert glass bodies capable of effectively solidifying heavy metals are obtained and sent into the glass body storage device 142, and steam generated by cooling can be used for waste heat utilization subsequently through the waste heat steam recovery system.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A multi-electrode plasma melting furnace is characterized in that: the induction cooker comprises a cooker bod, be provided with the melting pond in the furnace body, the melting pond includes that at least two are the range of straight line's the isolation zone of heating, and the bottom in each zone of heating communicates each other, corresponds on each zone of heating to be provided with an at least plasma torch, and each plasma torch is radially arranged along the melting pond, be provided with feed inlet and melten liquid discharge gate on the furnace body, be connected with feed arrangement on the feed inlet, can dismantle on the melten liquid discharge gate and be connected with discharging device, terminal zone of heating top is provided.

2. A multiple-electrode plasma melting furnace as claimed in claim 1 wherein: the melting tank is of a rectangular structure, and the plasma torches are positioned at the top of the heating zone and are arranged along the length direction of the melting tank.

3. A multiple-electrode plasma melting furnace as claimed in claim 1 wherein: the melting tank is divided into at least two heating zones by a partition wall, a melting liquid channel is formed between the bottom of the partition wall and the bottom surface of the melting tank, the melting liquid passes through the melting liquid channel, and a gap is formed between the bottom of the partition wall and the melting liquid.

4. A multiple electrode plasma melting furnace as claimed in claim 3 wherein: the height of the gap is 50 mm-300 mm.

5. A multiple-electrode plasma melting furnace as claimed in claim 1 wherein: the molten liquid discharge port is positioned below the molten liquid level, and the top surface of the molten liquid discharge port is at least 6 millimeters lower than the molten liquid level.

6. A multiple-electrode plasma melting furnace as claimed in claim 1 wherein: an electric heating rod is arranged on the molten liquid discharge port.

7. A multiple-electrode plasma melting furnace as claimed in claim 1 wherein: the furnace body comprises refractory bricks, a shell is arranged outside the refractory bricks, and heat insulation materials are filled between the shell and the outer walls of the refractory bricks.

8. A multiple-electrode plasma melting furnace as claimed in claim 1 wherein: the furnace body comprises a lower cavity and a top cover arranged above the lower cavity.