CN205995912U - Treatment of!medical waste equipment based on flotation combined microwave method - Google Patents

Abstract

The utility model discloses a kind for the treatment of of!medical waste equipment 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, sack cleaners, remove dioxin in incineration flue gas by activated carbon eductor+sack cleaner, so that the activated carbon of absorption dioxin is transferred in cloth bag flying dust；Flying dust through flotation obtain residual slurry and enrichment high concentration dioxin and activated carbon essence ash essence ash it is achieved that in flying dust dioxin and activated carbon separation；Enrichment high concentration dioxin that these flotation are obtained by this utility model and the smart ash of activated carbon be dried and pelletize after, carry out microwave treatment under an inert atmosphere；Carry out microwave treatment under inert atmosphere and do not destroy activated carbon, and keep the microstructure of activated carbon and its absorbability in essence ash, the flue gas purification system that the essence ash of these enrichment high-load activated carbons sends back to incinerator as adsorbent is recycled.

Description

Treatment of!medical waste equipment based on flotation combined microwave method

Technical field

This utility model belongs to technical field of waste treatment, relates in particular to a kind of doctor based on flotation combined microwave method Treat refuse treatment plant.

Background technology

Medical waste contain be infectious, the material of the harm mankind such as radioactivity and toxicant and environment is it is considered to be danger Danger.Burning is the main processing ways of current Chinese medical rubbish, and in medical waste, Cl and burning condition are two in incinerator Dislike two major influence factors that English is formed.The chlorine-bearing compound such as a large amount of polrvinyl chloride, NaCl, its Cl content is contained 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 conventional at present Activated carbon powder injection+Technology of Fabric Filter removing dioxin in incineration flue gas, the activated carbon transfer of these absorption dioxin To in cloth bag flying dust, lead to dioxin and activated carbon content in flying dust all higher, the activated carbon content of flying dust is usually more than 11%, domestic at present mostly flying dust is processed using the method such as cement solidification and medicament chelating, activity while flying dust is processed Charcoal also becomes useless, non-renewable resource.The activated carbon powder of gas cleaning generally adopts the material such as coconut husk, Fructus Pruni shell through complexity Working procedure processing forms, and its specific surface area is big, high adsorption capacity 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 burning 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 essence two kinds of products of ash by the method, for the FLOTATION SEPARATION of heavy metal in tail slurry, patent 201410034832.5 with patent 201510705257.1 individually discloses sulfurization-precipitation method and ion floatation method, solving a huge sum of money The recovery problem belonging to.However, most of dioxin and activated carbon are separated and are enriched in essence ash so that two during essence is grey in flying dust Dislike English content close to 30ng-TEQ/g, therefore need to decompose dioxin before essence ash final disposal.Carry in patent CN101797575B Go out the dual firing chamber that essence ash is sent into incinerator and fire process again, although the method can achieve effective decomposition of dioxin, with The activating agent of Shi Anggui is burned off causing the wasting of resources.

Microwave heating has the advantages that firing rate is fast, energy utilization rate is high, thermograde is little, and " hot spot-effect " is microwave The key property of heating, produced by this effect, quick heats conduction and convection type are not reached.Based on winged The absorption characteristic to microwave such as carbon component (activated carbon and unburned carbon residue), Fe3O4 and Fe2O3 in ash, patent CN103601526B The method of flying ash microwave baking ceramsite and the method for flying dust microwave melting are disclosed respectively with patent 201410249759.3, Although two methods can realize effective decomposition of dioxin by microwave method, because in flying dust, activated carbon is relatively low, Generally it is required for refilling the microwave coupling agent such as carborundum, activated carbon or ferroso-ferric oxide around granule to strengthen its wave absorbtion Energy.Because the carbon removal rate through froth flotation for the flying dust is more than 92%, after flotation essence ash in activated carbon content be former flying dust 3～ 4 times, more than 56%, the activated carbon of such high-load makes smart ash have strong microwave absorbing property to its clinker ignition loss, is not required to add other Inhale ripple medium and achieve that microwave treatment.In addition, microwave method, as a kind of method of reproduction of activated carbon, not only can keep activated carbon Good microstructure and absorption property, and can repeatedly regenerate.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of doctor based on flotation combined microwave method Treat refuse treatment plant, it can solve at low cost by efficiently separating to heavy metal, dioxin and activated carbon in flying dust Certainly in flying dust heavy metal recovery, the decomposition of dioxin and activated carbon recycling problem, realizing flying dust harmless treatment While carry out high value added utilization.

This utility model is achieved through 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, sack cleaner, wet scrubber tower, air-introduced machine, flotation column, microwave agglomerating furnace, comminutor and Pulverizer,

Rotary kiln outlet connects the charging aperture of dual firing chamber, and the air vent on dual firing chamber top connects the import at chilling tower top end, The outlet at chilling bottom of towe end connects the import on Spray column top, and Spray column outlet connects cloth by activated carbon eductor The air inlet of bag dust collector, the gas outlet of sack cleaner passes sequentially through wet scrubber tower, air-introduced machine is connected with chimney,

The discharging opening of sack cleaner bottom connects flotation column, and the essence ash outlet of flotation column connects pelletize through drying machine Machine, comminutor connects the charging aperture of microwave agglomerating furnace, and the size-reduced machine of discharging opening of microwave agglomerating furnace connects activated carbon make-up tank, lives Property charcoal make-up tank connect activated carbon eductor.

The operation method of the described treatment of!medical waste equipment based on flotation combined microwave method is as follows：

Medical waste initially enters rotary kiln, and then the medical waste entrance dual firing chamber through rotary kiln primary combustion carries out two Secondary abundant burning；The discharge gate from dual firing chamber bottom for the bottom ash after burning is discharged, and the flue gas that burning produces is from dual firing chamber top Air vent enters chilling tower, and flue gas enters Spray column after the humidification cooling of over-quenching tower and carries out desulfurization；Flue gas enters afterwards Activated carbon eductor, to adsorb the dioxin in flue gas, these adsorb dioxin to activated carbon eductor injection activated carbon powder afterwards Activated carbon powder filter through sack cleaner, discharge from the discharging opening of sack cleaner, transfer in cloth bag flying dust；Through cloth The gas of bag dust collector is then discharged from chimney through wet scrubber tower and air-introduced machine；Described cloth bag flying dust enters flotation column, flotation Post carries out flotation to cloth bag flying dust, and flotation obtains residual slurry and essence two kinds of products of ash；Wherein, residual slurry carries out filtration separation process, obtains To tail ash and filtrate, tail ash sends into household refuse landfill sites landfill stabilization, and filtrate carries out after heavy metal recovery after safe handling Discharge；Pelletize after essence ash is dry, is then fed into microwave agglomerating furnace and carries out microwave treatment under an inert atmosphere；Essence ash warp after process After pulverizing, send into activated carbon make-up tank, return activated carbon eductor as adsorbent and reused.

In technique scheme, described inert atmosphere is N₂Or CO₂Atmosphere, preferably N₂.

In technique scheme, the power of described microwave treatment is 1200W～2400W.

In technique scheme, the time of described microwave treatment is 7min～15min.

Advantage of the present utility model and having the beneficial effect that：

This utility model passes through rotary kiln, dual firing chamber, chilling tower, Spray column, activated carbon eductor, sack cleaner Deng equipment, medical waste is carried out with burning disposal, remove two evil in incineration flue gas by activated carbon eductor+sack cleaner English, makes these activated carbons adsorbing dioxin transfer in cloth bag flying dust；Flying dust obtains residual slurry through flotation and enrichment is highly concentrated The essence ash essence ash of degree dioxin and activated carbon is it is achieved that separation to dioxin in flying dust and activated carbon；This utility model by this After enrichment high concentration dioxin that a little flotation obtain and the smart ash of activated carbon are dried simultaneously pelletize, carry out micro- under an inert atmosphere Ripple is processed, and activated carbon forms " focus effect as good suction ripple medium, the high temperature that can quickly obtain 1000 DEG C under microwave exposure Should ", in essence ash, a large amount of " focuses " will be adsorbed in activated carbon surfaces externally and internally or the dioxin with activated carbon one is decomposed into CO₂, CO, H₂O and HCl etc., meanwhile, the bulk temperature of essence ash raises, and leads to Fe in essence ash₃O₄, Fe₂O₃And TiO₂Start to absorb micro- Deng composition Dioxin in essence ash is thoroughly decomposed, carries out microwave treatment and do not destroy activated carbon, and keep under inert atmosphere by ripple further Or improving the microstructure of activated carbon and its absorbability in essence ash, the essence ash of these enrichment high-load activated carbons is as adsorbent The flue gas purification system sending back to incinerator is recycled.The method, while realizing flying dust thorough harmless treatment, has Effect realizes the recycling of the activated carbon of high value in essence ash.

Brief description

Fig. 1 is the structural representation of the treatment of!medical waste equipment in embodiment based on flotation combined microwave method.

Fig. 2 is the recycling flow chart of flying dust essence ash after flotation, microwave treatment.

Specific embodiment

Further illustrate the technical solution of the utility model with reference to specific embodiment.

Referring to accompanying 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, sack cleaner, wet scrubber tower, air-introduced machine, flotation column, microwave sintering Stove, comminutor and pulverizer；

Medical waste initially enters rotary kiln, and rotary kiln outlet connects dual firing chamber, the medical rubbish through rotary kiln primary combustion Rubbish enters dual firing chamber and carries out secondary abundant burning；The discharge gate from dual firing chamber bottom for the bottom ash after burning is discharged, dual firing chamber top Air vent connect the import at chilling tower top end, the outlet at chilling bottom of towe end connects Spray column, so that what dual firing chamber discharged Flue gas enters Spray column after the humidification cooling of over-quenching tower and carries out desulfurization；Activated carbon eductor is passed through in Spray column outlet Connect the air inlet of sack cleaner, the gas outlet of sack cleaner passes sequentially through wet scrubber tower, air-introduced machine is connected with chimney, , to adsorb the dioxin in flue gas, the activated carbon powder of these absorption dioxin is through cloth bag for activated carbon eductor injection activated carbon powder Cleaner unit filters, and discharges from the discharging opening of sack cleaner, transfers in cloth bag flying dust, through the gas then warp of sack cleaner Cross wet scrubber tower and air-introduced machine to discharge from chimney；

The discharging opening of sack cleaner connects flotation column, carries out flotation using flotation column to cloth bag flying dust, flotation obtains residual Slurry and essence two kinds of products of ash；Wherein, residual slurry carries out filtration separation process, obtains tail ash and filtrate, and tail ash is sent into house refuse and filled out Bury a landfill stabilization, filtrate is discharged after carrying out heavy metal recovery after safe handling；The essence ash outlet of flotation column is through drying machine (not marking drying machine in Fig. 1) connects comminutor, and comminutor connects the charging aperture of microwave agglomerating furnace, so that essence ash is made after being dried Grain, is then passed through noble gases by pelletize feeding microwave agglomerating furnace and to microwave agglomerating furnace, makes the essence ash after pelletize in indifferent gas (activated carbon in essence ash, as good suction ripple medium, can quickly obtain 1000 under microwave exposure to carry out microwave treatment under atmosphere DEG C high temperature form " hot spot-effect ", in essence ash a large amount of " focuses " by 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 raises, and leads to Fe in essence ash₃O₄, Fe₂O₃And TiO₂Start to absorb microwave Deng composition, further dioxin in essence ash is thoroughly decomposed, carry out microwave treatment under inert atmosphere and do not have There is destruction activated carbon, and keep or improve the microstructure of activated carbon and its absorbability in essence ash)；The going out of microwave agglomerating furnace The size-reduced machine of material mouth connects activated carbon make-up tank, and activated carbon make-up tank connects activated carbon eductor, so that the essence ash warp after processing After pulverizing, send into activated carbon make-up tank, return activated carbon eductor as adsorbent.

With reference to specific embodiment, the concrete processing method of the flotation to flying dust is described and flotation obtained with residual slurry and essence The concrete 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 is pressed solid-to-liquid ratio 1 with water：20 are configured to mortar, and add agent for capturing kerosene (12kg/t) With foaming agent terpenic oil (3kg/t), adopt 0.06m in flotation column³Carry out flotation, flotation obtains residual slurry under the gas flow rate of/h With essence two kinds of products of ash.Wherein, residual slurry obtains tail ash and serosity after filtering.The acid extractant adding in serosity makes major part The heavy metals such as Pb, Zn are present in filtrate, add NaHS or Na in filtrate₂The heavy metal precipitators such as S, by the huge sum of money such as Pb, Zn Belong to reclaim, waste liquid through sewage disposal up to standard after discharge.Another product essence ash composition, clinker ignition loss and two after flotation Dislike English content etc. and be shown in Table 1.

Table 1：The main chemical compositions of flying ash and essence ash, clinker ignition loss and dioxins concentration (%) in embodiment 1

After essence ash is dried, a small amount of polyvinyl alcohol water solution is added to mix and be squeezed into granule, shaped particles in essence ash Size be 10 millimeters of diameter, highly 15 millimeters, will extruding after sample take 8 overlaps to be placed in a silica crucible bottom, will Crucible is put into and is carried out microwave treatment in industrial microwave sintering furnace, in before processing and processing procedure, is always maintained in microwave agglomerating furnace N2 atmosphere, the operating frequency of microwave agglomerating furnace is 0.915GHz, and the power of microwave agglomerating furnace is 1800W, 9 minutes heat time heating times, Dioxin concentration after processing after tested is reduced to 0.21ng-TEQ/g, and the resolution ratio of dioxin is 99.3%, by microwave treatment Smart ash is pulverized afterwards, finds that its specific surface area is 632m2/g, absorption property is good, can send back to incinerator as adsorbent Flue gas purification system recycled.

Embodiment 2：

Using identical essence ash in embodiment 1, after essence ash is dried, add a small amount of polyvinyl alcohol water solution mixed in essence ash Merge and be squeezed into granule, the size of shaped particles is 8 millimeters of diameter, highly 12 millimeters, 8 overlaps will be taken to put by sample after extruding A silica crucible bottom, crucible is put into and in industrial microwave sintering furnace, carries out microwave treatment, in before processing and processing procedure, It is always maintained at CO2 atmosphere, the operating frequency of microwave agglomerating furnace is 0.915GHz, and the power of microwave agglomerating furnace is in microwave agglomerating furnace 1200W, 15 minutes heat time heating times, the dioxin concentration after processing after tested is reduced to 2.5ng-TEQ/g, the resolution ratio of dioxin For 91.4%, ash smart after microwave treatment is pulverized, found that its specific surface area is 466m2/g, absorption property is good, can conduct The flue gas purification system that adsorbent sends back to incinerator is recycled.

Embodiment 3：

Using identical essence ash in embodiment 1, after essence ash is dried, add a small amount of polyvinyl alcohol water solution mixed in essence ash Merge and be squeezed into granule, the size of shaped particles is 12 millimeters of diameter, highly 14 millimeters, 8 overlapping pendulum will be taken by sample after extruding It is placed on a silica crucible bottom, crucible is put into and in industrial microwave sintering furnace, carries out microwave treatment, before processing and processing procedure In, it is always maintained at N in microwave agglomerating furnace₂Atmosphere, the operating frequency of microwave agglomerating furnace is 0.915GHz, the power of microwave agglomerating furnace For 2100W, 7 minutes heat time heating times, the dioxin concentration after processing after tested is reduced to 0.06ng-TEQ/g, the decomposition of dioxin Rate is 99.8%, and ash smart after microwave treatment is pulverized, and finds that its specific surface area is 671m2/g, absorption property is good, can make The flue gas purification system sending back to incinerator for adsorbent is recycled.

What above-described embodiment illustrated is medical refuse burning flyash harmless treatment and recycling new technology, this practicality New be not limited to medical refuse burning flyash, apply also for the high domestic garbage incineration flyash of activated carbon content.Flotation device It is not limited to flotation column, can also be the floatation equipment for coal and flyash.

Although being described to preferred embodiment of the present utility model above in conjunction with accompanying drawing, this utility model is not It is confined to above-mentioned specific embodiment, above-mentioned specific embodiment is only schematically, is not restricted, ability The those of ordinary skill in domain under enlightenment of the present utility model, without departing from this utility model objective and claimed Under ambit, a lot of forms can also be made, these belong within protection domain of the present utility model.

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, sack cleaner, wet scrubber tower, air-introduced machine, flotation column, microwave sintering Stove, comminutor and pulverizer,

Rotary kiln outlet connects the charging aperture of dual firing chamber, and the air vent on dual firing chamber top connects the import at chilling tower top end, chilling The outlet at bottom of towe end connects the import on Spray column top, and Spray column outlet connects cloth bag by activated carbon eductor and removes The air inlet of dirt device, the gas outlet of sack cleaner passes sequentially through wet scrubber tower, air-introduced machine is connected with chimney,

The discharging opening of sack cleaner bottom connects flotation column, and the essence ash outlet of flotation column connects comminutor through drying machine, makes Grain machine connects the charging aperture of microwave agglomerating furnace, and the size-reduced machine of discharging opening of microwave agglomerating furnace connects activated carbon make-up tank, activated carbon Make-up tank connects activated carbon eductor.