CN106140792B - Treatment of!medical waste equipment and its processing method based on flotation combined microwave method - Google Patents
Treatment of!medical waste equipment and its processing method based on flotation combined microwave method Download PDFInfo
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- CN106140792B CN106140792B CN201610644658.5A CN201610644658A CN106140792B CN 106140792 B CN106140792 B CN 106140792B CN 201610644658 A CN201610644658 A CN 201610644658A CN 106140792 B CN106140792 B CN 106140792B
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- activated carbon
- flotation
- ash
- microwave
- dioxin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/0075—Disposal of medical waste
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Abstract
The invention discloses a kind for the treatment of of!medical waste equipment and its processing method based on flotation combined microwave method, burning disposal is carried out to medical waste by equipment such as rotary kiln, dual firing chamber, chilling tower, Spray column, activated carbon eductor, bag filters, dioxin in incineration flue gas is removed by activated carbon eductor+bag filter, the activated carbon of absorption dioxin is made to be transferred in cloth bag flying dust；Flying dust obtains the essence ash essence ash of residual slurry and enrichment high concentration dioxin and activated carbon by flotation, realizes the separation to dioxin in flying dust and activated carbon；After the smart ash of enrichment high concentration dioxin and activated carbon that these flotation obtain is dried and is granulated by the present invention, microwave treatment is carried out under an inert atmosphere；Microwave treatment is carried out under inert atmosphere and does not destroy activated carbon, and keeps the microstructure and its adsorption capacity of activated carbon in essence ash, and the flue gas purification system that these essence ashes for being enriched with high-content activated carbons send back to incinerator as adsorbent is recycled.
Description
Technical field
The invention belongs to technical field of waste treatment, relate in particular to a kind of medical rubbish based on flotation combined microwave method
Rubbish processing equipment and its processing method.
Background technology
Medical waste contain be infectious, radioactivity and toxicant etc. endanger the substance of the mankind and environment, it is considered to be danger
Danger.Burning is the main processing ways of current Chinese medical rubbish, and Cl and burning condition are two in incinerator in medical waste
Dislike two major influence factors that English is formed.Contain the chlorine-bearing compounds such as a large amount of polyvinyl chlorides, NaCl, Cl contents in medical waste
(1.1~2.1%) it is far above house refuse, medical refuse burning factory is considered as the emission source of dioxin.China is common at present
Active powdered carbon injection+Technology of Fabric Filter removes dioxin in incineration flue gas, activated carbons transfer of these absorption dioxin
Into cloth bag flying dust, cause dioxin and activated carbon content in flying dust higher, the activated carbon content of flying dust is usually more than
11%, domestic at present to mostly use the methods of cement solidification and medicament chelating greatly to handle flying dust, flying dust is processed while active
Charcoal also becomes useless, non-renewable resource.The materials such as the active powdered carbon generally use coconut husk of gas cleaning, apricot shell are through complexity
Process is process, its large specific surface area, adsorption capacity are strong and price is about 1.5 ten thousand yuan/ton, activated carbon in incineration plant flue gas
Emitted dose is up to 300-800mg/m3, a big chunk of the consumption Yi Zhan medical refuse burnings factory operating cost of activated carbon.
Patent CN101797575B discloses a kind of processing method of medical refuse burning flyash Floatation of Removal Carbon, by using
Flying dust is separated into tail slurry and the grey two kinds of products of essence by this method, for the FLOTATION SEPARATION of heavy metal in tail slurry, patent
201410034832.5 individually disclosing sulfurization-precipitation method and ion floatation method with patent 201510705257.1, solves a huge sum of money
The recycling problem of category.However, most of dioxin and activated carbon are detached and are enriched in smart ash in flying dust so that two in essence ash
English content is disliked close to 30ng-TEQ/g, therefore needs to decompose dioxin before smart grey final disposal.It is carried in patent CN101797575B
Go out and processing is fired into again in the dual firing chamber that smart ash is sent into waste incinerator, it is same although this method can realize effective decomposition of dioxin
The activating agent of Shi Anggui, which is burned off, to result in waste of resources.
Microwave heating has many advantages, such as that heating speed is fast, energy utilization rate is high, temperature gradient is small, and " hot spot-effect " is microwave
The key property of heating, quick heating effect conduction and convection type caused by the effect are not achieved.Based on winged
Carbon component (activated carbon and unburned carbon residue), Fe3O4 and Fe2O3 etc. are to the absorption characteristic of microwave, patent CN 103601526B in ash
The method for disclosing the method and the melting of flying dust microwave of flying ash microwave baking ceramsite respectively with patent 201410249759.3, two
Although kind of method can realize effective decomposition of dioxin by microwave method, since activated carbon is relatively low in flying dust, lead to
Often it is required for refilling the agent of the microwave couplings such as silicon carbide, activated carbon or ferroso-ferric oxide around particle to strengthen its wave absorbtion
Energy.Since carbon removal rate of the flying dust through froth flotation is more than 92%, after flotation essence ash in activated carbon content be former flying dust 3~
4 times, clinker ignition loss is more than 56%, and the activated carbon of such high-content makes smart ash have strong microwave absorbing property, is not required to add other
It inhales wave medium and achieves that microwave treatment.In addition, microwave method can not only keep activated carbon as a kind of method of reproduction of activated carbon
Good microstructure and absorption property, and can be repeated as many times regenerate.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of medical rubbish based on flotation combined microwave method
Rubbish processing equipment and its processing method, can be low by being efficiently separated to heavy metal, dioxin and activated carbon in flying dust
At it is local solves the problems, such as heavy metal recovery in flying dust, the decomposition of dioxin and activated carbon recycling, realization flying dust without
High value added utilization is carried out while evilization processing.
The present invention is achieved by the following technical solutions：
A kind for the treatment of of!medical waste equipment based on flotation combined microwave method, including rotary kiln, dual firing chamber, chilling tower, spray
Mist absorption tower, activated carbon eductor, bag filter, wet scrubber tower, air-introduced machine, flotation column, microwave agglomerating furnace, comminutor and
Pulverizer,
The feed inlet of rotary kiln outlet connection dual firing chamber, the import at the exhaust outlet connection chilling tower top end on dual firing chamber top,
The import on the outlet connection Spray column top at chilling bottom of tower end, Spray column outlet connects cloth by activated carbon eductor
The air inlet of bag dust collector, the gas outlet of bag filter pass sequentially through wet scrubber tower, air-introduced machine and chimney and connect,
The discharge port of bag filter bottom end connects flotation column, and the essence ash outlet of flotation column is granulated by drying machine connection
Machine, comminutor connect the feed inlet of microwave agglomerating furnace, and the discharge port of microwave agglomerating furnace connects activated carbon make-up tank through pulverizer, living
Property charcoal make-up tank connect activated carbon eductor.
The operation method of the treatment of!medical waste equipment based on flotation combined microwave method is as follows：
Medical waste initially enters rotary kiln, and the medical waste then through rotary kiln primary combustion enters dual firing chamber and carries out two
Secondary abundant burning；Bottom ash after burning is discharged from the discharge gate of dual firing chamber bottom, and the flue gas of generation of burning is from dual firing chamber top
Exhaust outlet is discharged into chilling tower, and flue gas enters Spray column after over-quenching tower humidification is cooling and carries out desulfurization；Flue gas enters later
Activated carbon eductor, the active powdered carbon of activated carbon eductor injection is to adsorb the dioxin in flue gas, these adsorb dioxin later
Active powdered carbon by bag filter filter, from the discharge port of bag filter be discharged, be transferred in cloth bag flying dust；Through cloth
The gas of bag dust collector then passes through wet scrubber tower and air-introduced machine and is discharged from chimney；The cloth bag flying dust enters flotation column, flotation
Column carries out flotation to cloth bag flying dust, and flotation obtains residual slurry and the grey two kinds of products of essence；Wherein, residual slurry is filtered separating treatment, obtains
To tail ash and filtrate, tail ash be sent into household refuse landfill sites landfill stabilization, filtrate carry out heavy metal recovery after after safe handling
Discharge；It is granulated after smart ash is dry, is then fed into microwave agglomerating furnace and carries out microwave treatment under an inert atmosphere；Treated, and essence ash passes through
After crushing, it is sent into activated carbon make-up tank, return to activated carbon eductor as adsorbent is utilized again.
In the above-mentioned technical solutions, the inert atmosphere is N2Or CO2Atmosphere, preferably N2。
In the above-mentioned technical solutions, the power of the microwave treatment is 1200W~2400W.
In the above-mentioned technical solutions, the time of the microwave treatment is 7min~15min.
The advantages of the present invention are：
The present invention is set by rotary kiln, dual firing chamber, chilling tower, Spray column, activated carbon eductor, bag filter etc.
It is standby that burning disposal is carried out to medical waste, dioxin in incineration flue gas is removed by activated carbon eductor+bag filter, is made
The activated carbon of these absorption dioxin is transferred in cloth bag flying dust；Flying dust obtains residual slurry by flotation and enrichment high concentration two is disliked
The essence ash essence ash of English and activated carbon, realizes the separation to dioxin in flying dust and activated carbon；The present invention obtains these flotation
Enrichment high concentration dioxin and activated carbon smart ash be dried and be granulated after, carry out microwave treatment under an inert atmosphere, it is living
Property charcoal as good suction wave medium, can be quickly obtained under microwave irradiation 1000 DEG C high temperature formed " hot spot-effect ", essence ash
In a large amount of " hot spots " activated carbon surfaces externally and internally will be adsorbed in or be decomposed into CO with the dioxin of activated carbon one2, CO, H2O and HCl
Deng, meanwhile, the bulk temperature of essence ash increases, and leads to Fe in smart ash3O4, Fe2O3And TiO2Equal ingredients start to absorb microwave, further
Dioxin in smart ash is thoroughly decomposed, microwave treatment is carried out under inert atmosphere and does not destroy activated carbon, and keeps or improve essence
The microstructure and its adsorption capacity of activated carbon in ash, the essence ash of these enrichment high-content activated carbons sends back to as adsorbent to be burnt
The flue gas purification system for burning stove is recycled.This method effectively realizes essence while the thorough harmless treatment of realization flying dust
The recycling of the activated carbon of high value in ash.
Description of the drawings
Fig. 1 is the structural schematic diagram of the treatment of!medical waste equipment based on flotation combined microwave method in embodiment.
Fig. 2 is the recycling flow chart of flying dust essence ash after flotation, microwave treatment.
Specific implementation mode
The technical solution further illustrated the present invention with reference to specific embodiment.
Referring to attached drawing 1, a kind for the treatment of of!medical waste equipment based on flotation combined microwave method, including rotary kiln, dual firing chamber,
Chilling tower, Spray column, activated carbon eductor, bag filter, wet scrubber tower, air-introduced machine, flotation column, microwave sintering
Stove, comminutor and pulverizer；
Medical waste initially enters rotary kiln, rotary kiln outlet connection dual firing chamber, the medical rubbish through rotary kiln primary combustion
Rubbish enters dual firing chamber and carries out secondary abundant burning；Bottom ash after burning is discharged from the discharge gate of dual firing chamber bottom, dual firing chamber top
Exhaust outlet connection chilling tower top end import, the outlet at chilling bottom of tower end connects Spray column, so that dual firing chamber's discharge
Flue gas enters Spray column after over-quenching tower humidification is cooling and carries out desulfurization；Spray column outlet passes through activated carbon eductor
The air inlet of bag filter is connected, the gas outlet of bag filter passes sequentially through wet scrubber tower, air-introduced machine and chimney and connects,
For the active powdered carbon of activated carbon eductor injection to adsorb the dioxin in flue gas, the active powdered carbon of these absorption dioxin passes through cloth bag
Deduster filters, and is discharged from the discharge port of bag filter, is transferred in cloth bag flying dust, is then passed through through the gas of bag filter
Wet scrubber tower and air-introduced machine is crossed to be discharged from chimney；
The discharge port of bag filter connects flotation column, carries out flotation to cloth bag flying dust using flotation column, flotation obtains residual
Slurry and the grey two kinds of products of essence；Wherein, residual slurry is filtered separating treatment, obtains tail ash and filtrate, and tail ash is sent into house refuse and is filled out
A landfill stabilization is buried, filtrate is discharged after carrying out heavy metal recovery after safe handling；Drying machine is passed through in the essence ash outlet of flotation column
(not marking drying machine in Fig. 1) connects comminutor, and comminutor connects the feed inlet of microwave agglomerating furnace, so as to be made after essence ash is dry
Then grain will be granulated and be sent into microwave agglomerating furnace and be passed through inert gas to microwave agglomerating furnace, make the essence ash after granulation in indifferent gas
Microwave treatment is carried out under atmosphere, and (activated carbon in essence ash can be quickly obtained 1000 as good suction wave medium under microwave irradiation
DEG C high temperature form " hot spot-effect ", in essence ash a large amount of " hot spots " will be adsorbed in activated carbon surfaces externally and internally or with activated carbon one
Dioxin is decomposed into CO2, CO, H2O and HCl etc., meanwhile, the bulk temperature of essence ash increases, and leads to Fe in smart ash3O4, Fe2O3And
TiO2Equal ingredients start to absorb microwave, further thoroughly decompose dioxin in smart ash, microwave treatment is carried out under inert atmosphere and is not had
There is destruction activated carbon, and keep or improve the microstructure and its adsorption capacity of activated carbon in essence ash)；Microwave agglomerating furnace goes out
Material mouth connects activated carbon make-up tank through pulverizer, and activated carbon make-up tank connects activated carbon eductor, so that treated, essence ash passes through
After crushing, it is sent into activated carbon make-up tank, activated carbon eductor is returned as adsorbent.
Illustrate the specific processing method of flotation to flying dust with reference to specific embodiment and residual slurry and essence are obtained to flotation
The specific processing method of ash：
Embodiment 1：
Certain medical refuse burning flyash (i.e. cloth bag flying dust) chemical composition and clinker ignition loss, heavy metal, dioxin and chlorine contain
Amount is shown in Table 1.Medical refuse burning flyash and water are pressed into solid-to-liquid ratio 1：20 are configured to mortar, and agent for capturing kerosene (12kg/t) is added
With foaming agent terpenic oil (3kg/t), 0.06m is used in flotation column3Flotation is carried out under the gas flow rate of/h, flotation obtains residual slurry
With smart grey two kinds of products.Wherein, tail ash and slurries are obtained after residual slurry filtering.The acid extractant being added in slurries makes major part
The heavy metals such as Pb, Zn are present in filtrate, and NaHS or Na is added in filtrate2The heavy metal precipitators such as S, by the huge sum of money such as Pb, Zn
Belong to recycling, waste liquid discharges after sewage disposal is up to standard.Another product-essence ash composition, clinker ignition loss and two after flotation
It dislikes English content etc. and is shown in Table 1.
Table 1：Main chemical compositions, clinker ignition loss and the dioxins concentration (%) of flying ash and essence ash in embodiment 1
After smart ash drying, it is added in a small amount of polyvinyl alcohol water solution to smart ash and mixes and be squeezed into particle, shaped particles
Size be 10 millimeters of diameter, height 15 millimeters, take 8 overlappings to be placed in a silica crucible bottom in sample after extruding, general
Crucible, which is put into industrial microwave sintering furnace, carries out microwave treatment, before processing and in processing procedure, is always maintained in microwave agglomerating furnace
N2 atmosphere, the working frequency of microwave agglomerating furnace are 0.915GHz, and the power of microwave agglomerating furnace is 1800W, 9 minutes heating times,
Dioxin concentration that treated after tested is reduced to 0.21ng-TEQ/g, and the resolution ratio of dioxin is 99.3%, by microwave treatment
Smart ash crushes afterwards, it is found that its specific surface area is 632m2/g, absorption property is good, can be used as adsorbent and sends back to incinerator
Flue gas purification system recycled.
Embodiment 2：
It is added in a small amount of polyvinyl alcohol water solution to smart ash and mixes after smart ash drying using identical essence ash in embodiment 1
Merging is squeezed into particle, and the size of shaped particles is 8 millimeters of diameter, 12 millimeters of height, takes 8 overlappings to put in sample after extruding
A silica crucible bottom, crucible is put into industrial microwave sintering furnace and carries out microwave treatment, before processing and in processing procedure,
CO2 atmosphere is always maintained in microwave agglomerating furnace, the working frequency of microwave agglomerating furnace is 0.915GHz, and the power of microwave agglomerating furnace is
1200W, 15 minutes heating times, dioxin concentration that treated after tested are reduced to 2.5ng-TEQ/g, the resolution ratio of dioxin
It is 91.4%, smart ash after microwave treatment is crushed, it is found that its specific surface area is 466m2/g, absorption property is good, can be used as
The flue gas purification system that adsorbent sends back to incinerator is recycled.
Embodiment 3：
It is added in a small amount of polyvinyl alcohol water solution to smart ash and mixes after smart ash drying using identical essence ash in embodiment 1
Merging is squeezed into particle, and the size of shaped particles is 12 millimeters of diameter, 14 millimeters of height, and sample after extruding is taken 8 overlapping pendulum
It is placed on a silica crucible bottom, crucible is put into industrial microwave sintering furnace and carries out microwave treatment, handles preceding and processing procedure
In, N is always maintained in microwave agglomerating furnace2The working frequency of atmosphere, microwave agglomerating furnace is 0.915GHz, the power of microwave agglomerating furnace
For 2100W, 7 minutes heating times, dioxin concentration that treated after tested is reduced to 0.06ng-TEQ/g, the decomposition of dioxin
Rate is 99.8%, and smart ash after microwave treatment is crushed, it is found that its specific surface area is 671m2/g, absorption property is good, can make
The flue gas purification system that incinerator is sent back to for adsorbent is recycled.
That above-described embodiment illustrates is medical refuse burning flyash harmless treatment and recycling new process, the present invention
It is not limited to medical refuse burning flyash, applies also for the high domestic garbage incineration flyash of activated carbon content.Flotation device is unlimited
In flotation column, the floatation equipment for coal and flyash can also be.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited in upper
The specific implementation mode stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is common
Technical staff under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, may be used also
By make it is many in the form of, within these are all belonged to the scope of protection of the present invention.
Claims (1)
1. a kind for the treatment of of!medical waste equipment based on flotation combined microwave method, it is characterised in that：Including rotary kiln, dual firing chamber,
Chilling tower, Spray column, activated carbon eductor, bag filter, wet scrubber tower, air-introduced machine, flotation column, microwave sintering
Stove, comminutor and pulverizer,
The feed inlet of rotary kiln outlet connection dual firing chamber, the import at the exhaust outlet connection chilling tower top end on dual firing chamber top, chilling
The import on the outlet connection Spray column top at bottom of tower end, Spray column outlet connects cloth bag by activated carbon eductor and removes
The air inlet of dirt device, the gas outlet of bag filter pass sequentially through wet scrubber tower, air-introduced machine and chimney and connect,
The discharge port of bag filter bottom end connects flotation column, and the essence ash outlet of flotation column connects comminutor by drying machine, makes
The feed inlet of grain machine connection microwave agglomerating furnace, the discharge port of microwave agglomerating furnace connect activated carbon make-up tank, activated carbon through pulverizer
Make-up tank connects activated carbon eductor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810718655.0A CN108787713B (en) | 2016-08-05 | 2016-08-05 | Method for treating medical waste based on flotation combined microwave method |
| CN201610644658.5A CN106140792B (en) | 2016-08-05 | 2016-08-05 | Treatment of!medical waste equipment and its processing method based on flotation combined microwave method |
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| CN201610644658.5A CN106140792B (en) | 2016-08-05 | 2016-08-05 | Treatment of!medical waste equipment and its processing method based on flotation combined microwave method |
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| CN108530031B (en) * | 2018-05-03 | 2023-08-01 | 天津城建大学 | Device and method for firing porous ceramic by using waste incineration fly ash |
| CN109751607A (en) * | 2019-01-23 | 2019-05-14 | 民政部一零一研究所 | A kind of sacrificial offerings incinerator with flue gas purification system |
| CN111922025A (en) * | 2019-05-13 | 2020-11-13 | 天津城建大学 | Garbage treatment equipment and method based on triboelectric separation and microwave regeneration |
| CN111922026A (en) * | 2019-05-13 | 2020-11-13 | 天津城建大学 | Incineration fly ash triboelectric separation treatment equipment and method |
| CN113522929B (en) * | 2021-06-30 | 2022-08-09 | 西安交通大学 | Gasification fly ash graded resource utilization system and method |
| CN117139346B (en) * | 2023-10-31 | 2024-02-23 | 杭州灰弘环保科技有限公司 | Harmless system and method for low-temperature pyrolysis desorption in household garbage incineration fly ash |
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| JPS57132582A (en) * | 1981-02-10 | 1982-08-16 | Kobe Steel Ltd | Microwave heating and dissolving treatment for waste matter containing heavy metal |
| US5364453A (en) * | 1992-09-22 | 1994-11-15 | Geobiotics, Inc. | Method for recovering gold and other precious metals from carbonaceous ores |
| JP3621955B2 (en) * | 2001-08-08 | 2005-02-23 | 隆 仁田 | Method and system for decomposing and removing organochlorine compounds and dioxins from incinerated ash or contaminated soil |
| WO2004007365A1 (en) * | 2002-07-10 | 2004-01-22 | Japan Envirochemicals, Ltd. | Method of heating active carbon |
| CN101643205B (en) * | 2008-08-06 | 2011-11-16 | 王庆凯 | Equipment and method for active carbon microwave activation |
| CN201330159Y (en) * | 2008-09-16 | 2009-10-21 | 浙江省林业科学研究院 | Activated carbon rinsing equipment |
| CN101798081B (en) * | 2009-12-11 | 2012-08-22 | 深圳市兖能环保科技有限公司 | Method and device for producing active carbon from solid product in refuse microwave pyrolysis treatment system |
| CN101797575B (en) * | 2010-03-09 | 2012-01-04 | 天津城市建设学院 | Flyash treatment method for waste incineration |
| CN103128097B (en) * | 2013-03-22 | 2015-08-05 | 厦门大学 | A kind of processing method of fly ash from burning city domestic garbage |
| CN103363531B (en) * | 2013-07-08 | 2015-09-16 | 上海灿州环境工程有限公司 | A kind of dangerous waste incinerator complexes |
| CN103601526B (en) * | 2013-12-02 | 2015-12-02 | 天津城建大学 | The method of the firing porous haydite of a kind of medical refuse burning flyash microwave |
| CN104275245B (en) * | 2014-01-22 | 2017-07-04 | 天津城建大学 | The method of medical refuse burning flyash stepped-flotation separation detoxification |
| CN104028087B (en) * | 2014-05-30 | 2016-04-13 | 浙江大学 | A kind of method and device thereof removing dioxin in high-temperature flue gas |
| CN205995912U (en) * | 2016-08-05 | 2017-03-08 | 天津城建大学 | Treatment of!medical waste equipment based on flotation combined microwave method |
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| CN106140792A (en) | 2016-11-23 |
| CN108787713B (en) | 2021-04-20 |
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