CN112902192A - Plasma melting furnace for recycling flue gas and working method thereof - Google Patents
Plasma melting furnace for recycling flue gas and working method thereof Download PDFInfo
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- CN112902192A CN112902192A CN202110188968.1A CN202110188968A CN112902192A CN 112902192 A CN112902192 A CN 112902192A CN 202110188968 A CN202110188968 A CN 202110188968A CN 112902192 A CN112902192 A CN 112902192A
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- 238000002844 melting Methods 0.000 title claims abstract description 74
- 230000008018 melting Effects 0.000 title claims abstract description 73
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000003546 flue gas Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004064 recycling Methods 0.000 title claims abstract description 7
- 239000000779 smoke Substances 0.000 claims abstract description 84
- 238000007599 discharging Methods 0.000 claims abstract description 51
- 239000000463 material Substances 0.000 claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000002910 solid waste Substances 0.000 claims description 10
- 239000011229 interlayer Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000002699 waste material Substances 0.000 description 7
- 239000002920 hazardous waste Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000002906 medical waste Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000002925 low-level radioactive waste Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a plasma melting furnace for recycling flue gas and a working method thereof, wherein the plasma melting furnace comprises a melting furnace body, a feeding hole arranged on the melting furnace body, a first plasma heat source unit, a discharging material channel and a smoke exhaust channel; the melting furnace body comprises a first furnace section and a second furnace section which are connected, a hearth is arranged in the first furnace section, and the feeding hole and the first plasma heat source unit are both positioned on the first furnace section and communicated with the hearth; discharging material says and exhaust passage are located the second furnace section and are linked together with furnace, and exhaust passage and discharging material say that adjacent isolated and exhaust passage extend along discharging material say and set up about to utilize the heat of flue gas to keep warm for discharging material says heating. According to the plasma melting furnace, the smoke exhaust channel is arranged adjacent to the discharging material channel, and high-temperature smoke is used for heating and insulating the discharging material channel, so that the discharging material channel is prevented from being blocked at a cold section, and the efficient utilization of the smoke is realized; the flow of the flue gas has a pushing effect on the molten liquid at the discharge port, and is beneficial to discharging.
Description
Technical Field
The invention relates to the technical field of solid waste treatment, in particular to a plasma melting furnace for recycling flue gas and a working method thereof.
Background
Currently, the plasma high-temperature melting technology is gradually applied to the fields of medical waste, hazardous waste (such as fly ash, incineration bottom slag, sludge and the like), medium-low level waste treatment and the like. Practical application shows that effective melting and harmless treatment of waste can be realized by means of the high-temperature characteristic and the activation characteristic of the plasma, and the method has wider application prospect. However, two problems of the current plasma equipment are still to be solved, one of the problems is that the high-temperature characteristic of the plasma determines that the flue gas temperature is high, a large amount of heat is taken away, and the thermal efficiency of the melting furnace is low; secondly, the melting point of the treated solid waste is more than 1300-1450 ℃, the degree of superheat in the furnace is low, and the discharge hole is easy to block.
At present, the thermal efficiency of the existing engineering demonstration and engineering applied plasma melting furnace is generally low, the thermal efficiency of a medium-sized melting furnace and a small-sized melting furnace is about 20-35%, and the thermal efficiency of a large-sized melting furnace is only about 50%. Meanwhile, the plasma heat source is pure electric equipment, so that the energy consumption of unit processing materials is high, and the technical popularization is greatly influenced. Although the method for adding the auxiliary fuel can improve the heat efficiency of the whole furnace to a certain extent and reduce partial power consumption, the fuel combustion can generate a large amount of flue gas, the load of tail gas treatment is increased, and the overall cost of the system is increased.
In addition, the plasma fusion technology mainly treats medical waste, inorganic hazardous waste, incineration residue of low-or medium-radioactive waste, or hybrid hazardous waste containing a certain amount of organic hazardous waste. The general melting point of the waste is 1300-1450 ℃, the superheat degree of the melt in the furnace is low, and the cold section blockage is easy to occur in the discharge pipe section, so that an auxiliary heating device needs to be configured at the discharge pipe, the complexity of the system is directly increased due to the addition of the auxiliary heating device, the operation and maintenance of the whole melting furnace are more complicated, the manufacturing cost is higher, and the popularization and the application of the plasma melting technology are not facilitated.
Disclosure of Invention
The invention aims to provide a plasma melting furnace for recycling flue gas and a working method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: the plasma melting furnace for recycling the flue gas comprises a melting furnace body, a feeding hole arranged on the melting furnace body, a first plasma heat source unit, a discharging material channel and a smoke exhaust channel;
the melting furnace body comprises a first furnace section and a second furnace section which are connected, a hearth is arranged in the first furnace section, and the feeding hole and the first plasma heat source unit are both positioned on the first furnace section and communicated with the hearth;
discharging material says and smoke exhaust passage be located in the second furnace section and with furnace is linked together, smoke exhaust passage with discharging material says adjacent isolated from top to bottom just smoke exhaust passage follows discharging material says and extends the setting to the heat that utilizes the flue gas does discharging material says the heating keeps warm.
Preferably, the first plasma heat source unit comprises at least one first heat source interface for plugging a plasma heat source.
Preferably, the first plasma heat source unit further comprises a first plasma heat source plugged on the first heat source interface.
Preferably, the smoke evacuation channel is separated from the discharge channel by a refractory heat-conducting interlayer.
Preferably, the discharging channel comprises a first transverse section and a first vertical section, wherein the first transverse section is connected and communicated with the hearth; the first vertical section extends towards the bottom of the second furnace section and penetrates through the bottom, and a discharge hole is formed in the bottom;
the smoke exhaust channel comprises a second transverse section and a second vertical section, wherein the second transverse section is connected and communicated with the hearth and is positioned above the first transverse section, and the second vertical section is connected with the second transverse section and is positioned on one side of the first vertical section;
the second vertical section extends towards the side wall of the second furnace section and penetrates through the side wall, and a smoke outlet is formed in the side wall.
Preferably, the plasma melting furnace further comprises a safety smoke exhaust port with smoke exhaust pressure larger than that of the smoke exhaust channel, and the safety smoke exhaust port is arranged on the first furnace section and communicated with the hearth.
Preferably, the safety smoke exhaust port comprises a smoke exhaust pipe and a flow limiting assembly arranged at the smoke exhaust port;
the flow limiting assembly comprises a substrate and a flow limiting plate; the base plate is provided with a circulation hole communicated with the smoke outlet; the flow limiting plate is arranged on one side of the substrate, and is provided with a tapered flow limiting hole communicated with the flow hole; the aperture of the flow limiting hole is smaller than that of the flow through hole.
Preferably, the plasma melting furnace further comprises a second plasma heat source unit disposed on the second furnace section and communicating with the flue gas channel.
Preferably, the second plasma heat source unit comprises at least one second heat source interface for plugging a plasma heat source.
Preferably, the first plasma heat source unit further comprises a second plasma heat source plugged on the second heat source interface.
The invention also provides a working method of the plasma melting furnace, which comprises the following steps:
s1, heating a hearth in the first furnace section of the melting furnace body through the first plasma heat source unit;
s2, feeding solid waste into the hearth from a feed inlet, and heating and melting the solid waste into molten liquid at high temperature in the hearth;
and S3, discharging the molten liquid from a discharging material channel of a second furnace section of the melting furnace body under the overflow action, discharging high-temperature flue gas in the hearth from a smoke discharge channel of the second furnace section, and heating and insulating the discharging material channel by utilizing the heat of the high-temperature flue gas in the discharging process.
Preferably, when the pressure in the hearth reaches a safety preset value, a safety smoke outlet on the melting furnace body discharges smoke.
Preferably, step S3 further includes: and starting a second plasma heat source unit on a second furnace section of the melting furnace body, and heating the smoke exhaust channel through the second plasma heat source unit to supplement heat.
According to the plasma melting furnace, the smoke exhaust channel is arranged adjacent to the discharging material channel, the discharging material channel is heated and insulated by using high-temperature smoke, the discharging material channel is prevented from being blocked at a cold section, and efficient utilization of the smoke is realized. Meanwhile, the smoke flowing has a pushing effect on the melt with high viscosity at the discharge port, and the discharge is facilitated.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic cross-sectional view of a plasma melting furnace according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a current-limiting assembly in a plasma melting furnace according to an embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the plasma melting furnace for reusing flue gas according to an embodiment of the present invention includes a melting furnace body 10, a feeding port 20 disposed on the melting furnace body 10, a first plasma heat source unit 30, a discharging material channel 40, and a smoke exhaust channel 50.
The melting furnace body 10 comprises a first furnace section 11 and a second furnace section 12 which are connected, wherein a hearth 13 is arranged in the first furnace section 11 and is used for carrying out high-temperature melting treatment on solid wastes. The feeding hole 20 and the first plasma heat source unit 30 are both positioned on the first furnace section 11 and communicated with the furnace chamber 13, and waste is fed into the furnace chamber 13 through the feeding hole 20; the first plasma heat source unit 30 is used to provide a heat source for high-temperature melting treatment of the waste.
The discharging material channel 40 and the smoke discharging channel 50 are positioned in the second furnace section 12 and are communicated with the hearth 13. Wherein, the exhaust passage 50 is isolated with ejection of compact material way 40 is adjacent from top to bottom to exhaust passage 50 extends along ejection of compact material way 40 and sets up, keeps warm for ejection of compact material way 40 heating with the heat that utilizes the flue gas, ensures melt superheat degree and normal ejection of compact, reduces the energy consumption, improves the holistic heat utilization ratio of melting furnace.
Specifically, on the melting furnace body 10, the feed opening 20 is provided on the side wall of the first furnace section 11 remote from the second furnace section 12. The feed port 20 may be horizontally extended or may be obliquely extended upward or downward.
The first plasma heat source unit 30 is disposed on a side wall or a top wall of the first furnace section 11 and includes at least one first heat source interface 31 for plugging a plasma heat source. A plurality of first heat source interfaces 31 may be provided on different side walls or top walls of the first furnace section 11.
The first plasma heat source 30 unit further includes a first plasma heat source (not shown) inserted into the first heat source connector 31, for supplying plasma to melt the waste at a high temperature. It is to be understood that the first plasma heat source may be disposed on the first heat source port 31, or may be separate from the melting furnace body 10 of the present invention and assembled on site for use. The first plasma heat source may be a plasma generator.
The smoke evacuation channel 50 is disposed adjacent to the discharge channel 40 in the second furnace section 12, and one end of the smoke evacuation channel and one end of the discharge channel are close to and communicated with the furnace 13, and the other end of the smoke evacuation channel and the other end of the discharge channel extend in a direction away from the furnace 13. The extending direction of the smoke exhausting channel 50 is set corresponding to the extending direction of the discharging material channel 40, so that the discharging material channel 40 can be effectively heated and insulated. Through the heating heat preservation of discharge material way 40 of smoke exhaust passage 50, the discharge gate department of discharge material way 40 need not to set up auxiliary heating equipment such as electric heating, simplifies the structure, reduces equipment input and fortune dimension cost. Meanwhile, the temperature of the smoke outlet is also reduced, the subsequent cooling of the smoke is facilitated, the cooling water consumption for cooling the smoke is reduced, and the burden and the cost of subsequent equipment are reduced.
The smoke exhaust channel 50 and the end of the discharging channel 40 far away from the hearth 13 form a smoke outlet 53 and a discharge outlet 43 respectively. Wherein, the discharging channel 40 can comprise a first transverse section 41 connected and communicated with the hearth 13 and a first vertical section 42 connected with the first transverse section 41. The first vertical section 42 extends towards and through the bottom of the second furnace section 12, on which a discharge opening 43 is formed for discharging.
Correspondingly, the smoke evacuation channel 50 comprises a second transverse section 51 connected and communicated with the furnace 13 and positioned above the first transverse section 41, and a second vertical section 52 connected with the second transverse section 51 and positioned at one side of the first vertical section 42. The second vertical section 52 extends towards and through the side wall of the second furnace section 12, forming a smoke outlet 53 in the side wall for facilitating the removal of smoke.
Further, the smoke evacuation channel 50 is separated from the discharging channel 40 by a fireproof heat conducting interlayer 60, and the fireproof heat conducting interlayer 60 can conduct heat of the smoke evacuation channel 50 to the discharging channel 40 while isolating the smoke evacuation channel 50 from the discharging channel 40, so as to ensure the heating and heat preservation effects on the discharging channel 40.
Alternatively, the refractory heat-conducting interlayer 60 can be made of high-density, erosion-resistant, corrosion-resistant and thermal shock-resistant refractory materials such as corundum base, silicon-carbon system and graphite base, and has the advantages of excellent thermal stability, high thermal conductivity and the like.
Further, in order to cope with the situation of insufficient heat supply in the extreme working condition of the smoke exhaust passage 50, the plasma melting furnace of the present invention further comprises a second plasma heat source unit which is arranged on the second furnace section 12 and communicated with the smoke exhaust passage 50. Under the condition that the heat of high-temperature flue gas in the smoke exhaust channel 50 is insufficient, the second plasma heat source unit is started to heat, and the heating and heat preservation effects on the discharging material channel 40 are ensured.
The second plasma heat source unit comprises at least one second heat source interface 71 for plugging a plasma heat source, and a second plasma heat source (not shown) plugged on the second heat source interface 71. The second plasma heat source may be disposed at the second heat source port 71, or may be mounted separately from the melting furnace body 10 of the present invention and used in the field. The second plasma heat source may be a plasma generator.
The plasma melting furnace also comprises a safe smoke exhaust 80, and the safe smoke exhaust 80 is arranged on the first furnace section 11 and communicated with the furnace chamber 13. The smoke pressure (opening pressure) of the safe smoke exhaust port 80 is larger than the smoke pressure of the smoke exhaust channel 50, smoke is discharged from the smoke exhaust channel 50 when the melting furnace normally operates, and smoke is discharged from the safe smoke exhaust port 80 when the pressure in the furnace is abnormally over-limit due to blockage of the smoke outlet of the smoke exhaust channel 50, so that the safety of equipment and personnel is ensured, and the stability is higher.
With reference to fig. 1 and 2, the safety exhaust port 80 includes an exhaust port 81 and a flow restriction assembly disposed at the exhaust port 81. The flow restriction increases the pressure differential between the exhaust port 81 and the exhaust port 53 under normal conditions to ensure that during normal operation, the exhaust fumes exit the exhaust port 53.
The restrictor assembly includes a base plate 82 and a restrictor plate 83. The base plate 82 is detachably disposed in the smoke discharge port 81, and the base plate 82 is provided with a circulation hole 820 communicating with the smoke discharge port 81. The restrictor plate 83 is detachably attached to one side of the base plate 82, and the restrictor plate 83 is provided with a restrictor hole 830 communicating with the flow hole 820. The diameter of the flow restriction hole 830 is smaller than that of the flow hole 820, and the flow restriction hole 830 is tapered to increase the smoke evacuation resistance.
The restrictor assembly may include a plurality of restrictor plates 83 having restrictor holes 830 with different diameters to facilitate replacement as needed.
With reference to fig. 1 and 2, when the plasma melting furnace of the present invention is operated, the operation method thereof may include the following steps:
s1, the hearth 13 in the first stage 11 of the melting furnace body 10 is heated by the first plasma heat source unit 30.
And S2, feeding the solid waste into the hearth 13 from the feed inlet 20, and heating and melting the solid waste into molten liquid at high temperature in the hearth 13.
The solid waste is preferably crushed, compounded and granulated to form a waste source item, and then the waste source item enters the hearth 13.
Wherein, the first plasma heat source unit 30 generates high temperature plasma flame flow (flue gas) to be sprayed into the furnace, forming cyclone flame flow to heat the hearth 13, the solid waste in the hearth 13 and the molten pool at the bottom of the hearth 13.
S3, discharging the molten liquid from the discharging material channel 40 of the second furnace section 12 of the melting furnace body 10 under the overflow action, discharging the high-temperature flue gas in the hearth 13 from the smoke exhaust channel 50 of the second furnace section 12, and heating and preserving the heat of the high-temperature flue gas for the discharging material channel 40 by using the heat of the high-temperature flue gas in the discharging process.
Wherein, when the pressure in the hearth 13 increases to reach a safe preset value, the safe smoke outlet 80 on the melting furnace body 10 discharges smoke. The pressure increase in the furnace 13 is caused by: the smoke outlet 53 is clogged.
In addition, when the tapping channel 40 is insufficiently supplied with heat, it can lead to the melt gradually solidifying and blocking, in which case: and starting the second plasma heat source unit on the second furnace section 12 of the melting furnace body 10, heating the smoke exhaust channel 50 through the second plasma heat source unit, supplementing heat, and ensuring that the molten liquid is smoothly discharged from the discharge port 43 along the discharge material channel 40.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (13)
1. A plasma melting furnace for recycling flue gas is characterized by comprising a melting furnace body, a feeding hole, a first plasma heat source unit, a discharging material channel and a smoke exhaust channel, wherein the feeding hole is formed in the melting furnace body;
the melting furnace body comprises a first furnace section and a second furnace section which are connected, a hearth is arranged in the first furnace section, and the feeding hole and the first plasma heat source unit are both positioned on the first furnace section and communicated with the hearth;
discharging material says and smoke exhaust passage be located in the second furnace section and with furnace is linked together, smoke exhaust passage with discharging material says adjacent isolated from top to bottom just smoke exhaust passage follows discharging material says and extends the setting to the heat that utilizes the flue gas does discharging material says the heating keeps warm.
2. The plasma melting furnace of claim 1 wherein the first plasma heat source unit comprises at least one first heat source interface for plugging a plasma heat source.
3. The plasma melting furnace of claim 2 wherein the first plasma heat source unit further comprises a first plasma heat source plugged into the first heat source interface.
4. A plasma melting furnace as claimed in claim 2, wherein the flue gas removal channel is separated from the outfeed channel by a refractory heat conducting interlayer.
5. The plasma melting furnace of claim 1 wherein the outfeed throat comprises a first lateral section in contiguous communication with the hearth, a first vertical section connecting the first lateral section; the first vertical section extends towards the bottom of the second furnace section and penetrates through the bottom, and a discharge hole is formed in the bottom;
the smoke exhaust channel comprises a second transverse section and a second vertical section, wherein the second transverse section is connected and communicated with the hearth and is positioned above the first transverse section, and the second vertical section is connected with the second transverse section and is positioned on one side of the first vertical section;
the second vertical section extends towards the side wall of the second furnace section and penetrates through the side wall, and a smoke outlet is formed in the side wall.
6. The plasma melting furnace of claim 1 further comprising a safety exhaust port having a smoke exhaust pressure greater than a smoke exhaust pressure of the smoke exhaust channel, the safety exhaust port being disposed on the first furnace section and communicating with the furnace chamber.
7. The plasma melting furnace of claim 6, wherein the safety exhaust port comprises a smoke exhaust port, a flow restriction assembly disposed at the smoke exhaust port;
the flow limiting assembly comprises a substrate and a flow limiting plate; the base plate is provided with a circulation hole communicated with the smoke outlet; the flow limiting plate is arranged on one side of the substrate, and is provided with a tapered flow limiting hole communicated with the flow hole; the aperture of the flow limiting hole is smaller than that of the flow through hole.
8. The plasma-melting furnace of any of claims 1 to 7, further comprising a second plasma heat source unit disposed on the second furnace section and communicating with the flue gas channel.
9. The plasma melting furnace of claim 8 wherein the second plasma heat source unit comprises at least one second heat source interface for plugging a plasma heat source.
10. The plasma melting furnace of claim 9 wherein the first plasma heat source unit further comprises a second plasma heat source plugged into the second heat source interface.
11. A method of operating a plasma melting furnace as claimed in any one of claims 1 to 10, comprising the steps of:
s1, heating a hearth in the first furnace section of the melting furnace body through the first plasma heat source unit;
s2, feeding solid waste into the hearth from a feed inlet, and heating and melting the solid waste into molten liquid at high temperature in the hearth;
and S3, discharging the molten liquid from a discharging material channel of a second furnace section of the melting furnace body under the overflow action, discharging high-temperature flue gas in the hearth from a smoke discharge channel of the second furnace section, and heating and insulating the discharging material channel by utilizing the heat of the high-temperature flue gas in the discharging process.
12. The method of claim 11, wherein a safe smoke vent on the melter body discharges smoke when the pressure in the furnace chamber reaches a safe preset value.
13. The method of operating a plasma melting furnace of claim 11, wherein step S3 further comprises: and starting a second plasma heat source unit on a second furnace section of the melting furnace body, and heating the smoke exhaust channel through the second plasma heat source unit to supplement heat.
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| CN202110188968.1A CN112902192B (en) | 2021-02-19 | 2021-02-19 | Plasma melting furnace for recycling flue gas and working method thereof |
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| CN202110188968.1A CN112902192B (en) | 2021-02-19 | 2021-02-19 | Plasma melting furnace for recycling flue gas and working method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116835876A (en) * | 2023-07-07 | 2023-10-03 | 中国矿业大学(北京) | Solid waste fusion vitrification and fiberization system and method |
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| CN116835876A (en) * | 2023-07-07 | 2023-10-03 | 中国矿业大学(北京) | Solid waste fusion vitrification and fiberization system and method |
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