CN212029520U - Plasma melting dangerous waste treatment system - Google Patents
Plasma melting dangerous waste treatment system Download PDFInfo
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- CN212029520U CN212029520U CN202020446265.5U CN202020446265U CN212029520U CN 212029520 U CN212029520 U CN 212029520U CN 202020446265 U CN202020446265 U CN 202020446265U CN 212029520 U CN212029520 U CN 212029520U
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Abstract
The utility model discloses a plasma melting dangerous waste treatment system, which comprises a plasma melting furnace, wherein the plasma melting furnace is connected with a plasma torch, a high-temperature flue gas outlet and a high-temperature liquid outlet are arranged on the plasma melting furnace, the high-temperature flue gas outlet and the high-temperature liquid outlet are respectively connected with a first waste heat recovery unit and a second waste heat recovery unit, the second waste heat recovery unit is connected with a vitreous body recovery unit and a waste heat power generation unit, the waste heat power generation unit is connected with a plasma power supply, the plasma power supply is connected with the plasma torch to provide power for the plasma torch, the first waste heat recovery unit is connected with the waste heat power generation unit and a flue gas dust removal unit, the flue gas dust removal unit is connected with a flue gas purification unit and a feeding system, the utility model provides a flue gas treatment technology which can be used as carrier gas for recycling and can solve the flue gas emission and secondary fly ash disposal, the utility model provides a technique running cost is low, the feature of environmental protection is good.
Description
Technical Field
The utility model relates to a solid waste innocent treatment technical field specifically is a dangerous waste treatment system of plasma melting.
Background
At present, the annual treatment capacity of domestic garbage in China is more than 2 hundred million tons, approximately 50 percent of domestic garbage is treated by adopting a treatment method of incineration power generation, the generation amount of incineration fly ash is about 4 percent of the amount of garbage entering a furnace, the amount of fly ash needing to be treated every year reaches more than 400 million tons, the incineration fly ash is used as dangerous waste, the contents of dioxin and heavy metal are high, and the treatment technology is widely concerned by people.
The plasma high-temperature melting technology is characterized in that waste incineration fly ash is melted into glassy slag at a high temperature, organic pollutants such as dioxin in the fly ash are decomposed and destroyed by heating, heavy metals in the fly ash are effectively dissolved in the glassy slag in a solid state, the density of the incineration fly ash is greatly increased after the incineration fly ash is melted, the volume reduction can reach more than 2/3, and the stable slag can be used as building materials such as roadbeds and the like, so that the purpose of effective utilization is achieved, and the method is the most effective ultimate treatment method for solid wastes.
However, when fly ash is treated by the plasma melting method at present, high-temperature flue gas generated by melting needs to be discharged after secondary combustion and environment-friendly treatment such as desulfurization and denitrification, the flue gas treatment amount is large, the investment and operation cost is increased, and secondary pollution is easily caused.
Therefore, it is necessary to provide a plasma melting disposal system and method for fly ash disposal, which have good environmental protection performance, low operation cost and easy popularization, to solve the above technical difficulties.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a dangerous waste processing system of plasma melting and processing method 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:
a plasma melting dangerous waste treatment system comprises a plasma melting furnace, the plasma melting furnace is connected with a plasma torch, high-temperature carrier gas generated by the plasma torch heats waste in the plasma melting furnace to form glass melt, a high-temperature flue gas outlet and a high-temperature liquid outlet are arranged on the plasma melting furnace, the high-temperature flue gas outlet and the high-temperature liquid outlet are respectively connected with a first waste heat recovery unit and a second waste heat recovery unit, the second waste heat recovery unit is connected with a vitreous body recovery unit and a waste heat power generation unit, the waste heat power generation unit is connected with a plasma power supply, the plasma power supply is connected with the plasma torch to provide power for the plasma torch, the first waste heat recovery unit is connected with the waste heat power generation unit and the flue gas dust removal unit, the flue gas dust removal unit is connected with the flue gas purification unit and the feeding system, the feeding system is connected with the plasma melting furnace, and the flue gas purification unit is connected with the carrier gas supply control unit.
Preferably, the plasma torch carrier gas is carbon dioxide or oxygen or a mixed gas of inert gas and oxygen.
Preferably, the high-temperature flue gas is rapidly cooled by the first waste heat recovery unit, and the temperature is reduced to 200 ℃ from above 1000 ℃, so that the generation of dioxin is inhibited.
Preferably, the flue gas dust removal unit is one or two of a cyclone dust remover and a bag-type dust remover.
Preferably, the flue gas purification unit includes deacidification device, dehydrating unit and filter equipment that connect gradually.
Wherein, the deacidification device is any one of a dry deacidification device and an alkaline water spray tower.
Preferably, the carrier gas supply control unit is connected with the carrier gas storage tank and used for detecting and adjusting the pressure of the carrier gas storage tank and analyzing the gas components in the tank, and outputting the gas in the carrier gas storage tank to the plasma torch according to a certain pressure and flow; the carrier gas storage tank is connected with an oxygen supply source and a carrier gas supply source, and is used for supplementing carrier gas and oxygen when needed through a carrier gas supply control unit, the carrier gas storage tank is connected with an emergency discharge device, and the emergency discharge device is connected with the carrier gas supply control unit.
Preferably, the feeding system comprises a storage bin and a feeding metering device which are connected with each other.
Wherein, the feeding metering device adopts a spiral metering mode.
A plasma melting hazardous waste treatment method comprises the following steps:
s1: putting a certain amount of fly ash to be treated into a plasma melting furnace through a feeding system;
s2: the plasma torch provides melting heat for the plasma melting furnace, inorganic matters in the fly ash in the plasma melting furnace are melted into a vitreous body, and the solidification of heavy metals is realized; and decomposing dioxin;
s3: the high-temperature flue gas and the molten glass generated in the step S2 are subjected to heat conversion respectively by the first waste heat recovery unit and the second waste heat recovery unit to generate high-temperature steam which is used for generating power by the waste heat power generation unit; the generated power is supplied to a plasma power source to be reused as energy;
s4: the cooled molten glass processed in step S3 is sent to a vitreous body recovery unit; the low-temperature flue gas obtained after the treatment of the step S3 passes through a flue gas dust removal unit to remove dust from the flue gas, and the generated secondary fly ash enters the plasma melting furnace again through a feeding system to be treated;
s5: the flue gas after dust removal is desulfurized and dechlorinated by a flue gas purification unit, and then is dehumidified and filtered to further remove moisture and dust in the flue gas, so that the flue gas is purified;
s6: the purified flue gas is supplied to the plasma torch as the carrier gas through the carrier gas supply control unit, so that the cyclic utilization of the flue gas is realized, and the zero emission of the flue gas is realized.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a dangerous waste treatment system of plasma melting and processing method through handling solid waste high temperature plasma melting, can realize innoxious, minimizing and resourceful treatment of discarded object, the utility model provides a flue gas is handled as carrier gas circulation use, secondary flying dust remelting treatment technique after handling the flue gas and has been solved the flue gas emission and the secondary flying dust environmental protection problem that discarded object plasma melting was handled, has really realized the zero release of handling process, the utility model provides a technique running cost is low, the feature of environmental protection is good.
Drawings
FIG. 1 is a schematic view of the frame structure of the present invention;
fig. 2 is a schematic diagram of a frame structure according to an embodiment 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 plasma melting dangerous waste treatment system comprises a plasma melting furnace 1, wherein the plasma melting furnace 1 is connected with a plasma torch 2, high-temperature carrier gas generated by the plasma torch heats waste in the plasma melting furnace to form glass melt, the plasma torch carrier gas is carbon dioxide or oxygen or mixed gas of inert gas and oxygen, a high-temperature flue gas outlet and a high-temperature liquid outlet are formed in the plasma melting furnace, the high-temperature flue gas outlet and the high-temperature liquid outlet are respectively connected with a first waste heat recovery unit 3 and a second waste heat recovery unit 4, high-temperature flue gas is rapidly cooled by the first waste heat recovery unit 3, the temperature is reduced to 200 ℃ from the temperature higher than 1000 ℃, so that dioxin is inhibited from being generated, the second waste heat recovery unit 4 is connected with a glass body recovery unit 5 and a waste heat power generation unit 6, and the waste heat power generation unit is connected with a plasma power supply 7, plasma torch is connected to plasma power 7 and provides the power for the plasma torch, and waste heat power generation unit 6 and flue gas dust removal unit 8 are connected to first waste heat recovery unit 3, flue gas dust removal unit is arbitrary one or two kinds among cyclone, the sack cleaner, and flue gas dust removal unit connection flue gas purification unit 9 and charge-in system 10, flue gas purification unit is including deacidification device, dehydrating unit and the filter equipment that connects gradually, and wherein, deacidification device is arbitrary one among dry-type deacidification device, the buck spray column, and charge-in system connects the plasma melting furnace, charge-in system includes interconnect's feed bin and pay-off metering device, wherein, pay-off metering device adopts spiral metering mode, flue gas purification unit connection carrier gas supplies control unit 11, carrier gas supplies control unit connection carrier gas storage jar and is used for detecting the analysis of adjusting the pressure of carrier gas storage jar and jar interior gas composition, and outputting the gas in the carrier gas storage tank to the plasma torch according to certain pressure and flow; the carrier gas storage tank is connected with an oxygen supply source and a carrier gas supply source, and is used for supplementing carrier gas and oxygen when needed through a carrier gas supply control unit, the carrier gas storage tank is connected with an emergency discharge device, and the emergency discharge device is connected with the carrier gas supply control unit.
Specifically, as shown in fig. 2, a fly ash mixture to be treated is placed in a storage bin 12, fly ash is fed into a plasma melting furnace by a feeding and metering device 13, a plasma torch provides melting heat for the plasma melting furnace, the temperature of the plasma melting furnace is controlled to be above 1300 ℃, inorganic matters in the fly ash are melted into vitreous bodies, so that the solidification of heavy metals is realized, the vitreous bodies can be recycled as building materials, dioxin is decomposed at high temperature, the harmless treatment is realized, a small amount of organic components are oxidized, and subsequent links are carried out along with high-temperature flue gas; high-temperature steam generated after the high-temperature flue gas and the molten glass in the plasma melting furnace are subjected to heat conversion by the first waste heat recovery unit 3 and the second waste heat recovery unit 4 is used for generating power by the waste heat power generation unit; the plasma power supply of electric power supply that produces recycles as the energy, effectively reduce the system energy consumption, refrigerated glass liquid is sent into vitreous body recovery unit 5, the vitreous body is stacked the district, low temperature flue gas passes through cyclone 14 and sack cleaner 15, remove dust to the flue gas, the secondary fly ash that produces is carried feed bin 12, get into the melting furnace again through pay-off metering device 13 and handle, it does not have secondary fly ash output to have guaranteed the system, downstream side at the sack cleaner is provided with sprays deacidification device 16, carry out the desulfurization, the dechlorination to the flue gas, it can select buck spray column to spray deacidification device, buck realizes the recycling of water through circulating water 18 recycling system after waste water treatment system 17 disposes. And a dehumidifying device 19 and a filtering device 20 are connected at the downstream side of the spraying deacidifying device to further remove moisture and dust in the flue gas, so that the flue gas is purified, and the purified flue gas enters a gas storage tank for recycling. The carrier gas supply control unit analyzes the pressure and the composition of the gas in the gas storage tank 21, supplements the carrier gas and oxygen when necessary, and realizes emergency treatment through the emergency discharge device 22 in an emergency state; meanwhile, the carrier gas supply control unit outputs the gas in the gas storage tank to the plasma torch according to certain pressure and flow, so that the plasma melting furnace is heated.
A plasma melting hazardous waste treatment method comprises the following steps:
s1: putting a certain amount of fly ash to be treated into a plasma melting furnace through a feeding system;
s2: the plasma torch provides melting heat for the plasma melting furnace, inorganic matters in the fly ash in the plasma melting furnace are melted into a vitreous body, and the solidification of heavy metals is realized; and decomposing dioxin;
s3: the high-temperature flue gas and the molten glass generated in the step S2 are subjected to heat conversion respectively by the first waste heat recovery unit and the second waste heat recovery unit to generate high-temperature steam which is used for generating power by the waste heat power generation unit; the generated power is supplied to a plasma power source to be reused as energy;
s4: the cooled molten glass processed in step S3 is sent to a vitreous body recovery unit; the low-temperature flue gas obtained after the treatment of the step S3 passes through a flue gas dust removal unit to remove dust from the flue gas, and the generated secondary fly ash enters the plasma melting furnace again through a feeding system to be treated;
s5: the flue gas after dust removal is desulfurized and dechlorinated by a flue gas purification unit, and then is dehumidified and filtered to further remove moisture and dust in the flue gas, so that the flue gas is purified;
s6: the purified flue gas is supplied to the plasma torch as the carrier gas through the carrier gas supply control unit, so that the cyclic utilization of the flue gas is realized, and the zero emission of the flue gas is realized.
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 (7)
1. A plasma melting hazardous waste processing system which characterized in that: comprises a plasma melting furnace, the plasma melting furnace is connected with a plasma torch, high-temperature carrier gas generated by the plasma torch heats waste in the plasma melting furnace to form glass melt, the plasma melting furnace is provided with a high-temperature flue gas outlet and a high-temperature liquid outlet, the high-temperature flue gas outlet and the high-temperature liquid outlet are respectively connected with a first waste heat recovery unit and a second waste heat recovery unit, the second waste heat recovery unit is connected with a vitreous body recovery unit and a waste heat power generation unit, the waste heat power generation unit is connected with a plasma power supply, the plasma power supply is connected with the plasma torch to provide power for the plasma torch, the first waste heat recovery unit is connected with the waste heat power generation unit and the flue gas dust removal unit, the flue gas dust removal unit is connected with the flue gas purification unit and the feeding system, the feeding system is connected with the plasma melting furnace, and the flue gas purification unit is connected with the carrier gas supply control unit.
2. The plasma molten hazardous waste disposal system of claim 1, wherein: the plasma torch carrier gas is carbon dioxide or oxygen or a mixed gas of inert gas and oxygen.
3. The plasma molten hazardous waste disposal system of claim 1, wherein: the high-temperature flue gas is rapidly cooled by the first waste heat recovery unit, and the temperature is reduced to 200 ℃ from the temperature higher than 1000 ℃.
4. The plasma molten hazardous waste disposal system of claim 1, wherein: the flue gas dust removal unit is one or two of a cyclone dust remover and a bag-type dust remover.
5. The plasma molten hazardous waste disposal system of claim 1, wherein: the flue gas purification unit includes deacidification device, dehydrating unit and the filter equipment who connects gradually.
6. The plasma molten hazardous waste disposal system of claim 1, wherein: the carrier gas supply control unit is connected with the carrier gas storage tank and is used for detecting and adjusting the pressure of the carrier gas storage tank and analyzing the gas components in the tank, and outputting the gas in the carrier gas storage tank to the plasma torch according to certain pressure and flow; the carrier gas storage tank is connected with an oxygen supply source and a carrier gas supply source, and is used for supplementing carrier gas and oxygen when needed through a carrier gas supply control unit, the carrier gas storage tank is connected with an emergency discharge device, and the emergency discharge device is connected with the carrier gas supply control unit.
7. The plasma molten hazardous waste disposal system of claim 1, wherein: the feeding system comprises a storage bin and a feeding metering device which are connected with each other.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020446265.5U CN212029520U (en) | 2020-03-31 | 2020-03-31 | Plasma melting dangerous waste treatment system |
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| CN202020446265.5U CN212029520U (en) | 2020-03-31 | 2020-03-31 | Plasma melting dangerous waste treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336525A (en) * | 2020-03-31 | 2020-06-26 | 浙江大凡智能科技有限公司 | Plasma melting hazardous waste treatment system and treatment method |
| CN112845515A (en) * | 2020-12-30 | 2021-05-28 | 中科院过程工程研究所南京绿色制造产业创新研究院 | Method for treating pyrolysis flue gas of solid waste |
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2020
- 2020-03-31 CN CN202020446265.5U patent/CN212029520U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111336525A (en) * | 2020-03-31 | 2020-06-26 | 浙江大凡智能科技有限公司 | Plasma melting hazardous waste treatment system and treatment method |
| CN112845515A (en) * | 2020-12-30 | 2021-05-28 | 中科院过程工程研究所南京绿色制造产业创新研究院 | Method for treating pyrolysis flue gas of solid waste |
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