CN205702298U - The generating apparatus again of cast waste sand hot plasma - Google Patents
The generating apparatus again of cast waste sand hot plasma Download PDFInfo
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- CN205702298U CN205702298U CN201520806196.3U CN201520806196U CN205702298U CN 205702298 U CN205702298 U CN 205702298U CN 201520806196 U CN201520806196 U CN 201520806196U CN 205702298 U CN205702298 U CN 205702298U
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Abstract
A kind of cast waste sand hot plasma generating apparatus again, it is characterised in that: include knockout bed, screening machine, pulverizer, magnetic separator, cleaner unit, antiquated sand tank, heat plasma generating means, boiling fluidisation cooler and reclaimed sand finished pot；Antiquated sand tank linked by knockout bed after connecing screening machine, pulverizer and magnetic separator, tiny dust connects cleaner unit, antiquated sand tank connects the charging aperture of heat plasma generating means, and the outlet of heat plasma generating means connects boiling fluidisation cooler, and then connecing screening machine entrance reclaimed sand finished pot provides Foundry Works to reuse；Heat plasma generator entrance is connected to air or noble gas conveying pipe, the regeneration response rate >=85% of this equipment, reclaimed sand performance indications are better than homology fresh sand and other renovation process, it is entirely capable of being cast factory's cycling and reutilization, exhaust emissions index is far below discharge standard Chinese, American-European, produced fine powder quantity is greatly decreased, can be directly as the construction material of recycling.
Description
Technical field
This utility model relates to the regeneration equipment of a kind of cast waste sand.
Background technology
Along with the development of China's foundiy industry, 2012-2014 annual annual China casting output all breaks through 45,000,000 tons,
Account for more than the 40% of whole world casting output, but the most annual cast waste sand quantity that produces also reaches more than 45,000,000 tons, casts at present
Making antiquated sand recycling utilization ratio less than 10%, a large amount of cast waste sands are based on landfill or arbitrarily discard processing, such side
Face serious waste natural resources, on the other hand, it is well known that owing to cast waste sand contains resin molding, inoranic membrane and the gold such as sodium, potassium
Belong to the harmful substance such as oxide, cause very big hidden danger to environment, so casting is useless to comprehend at landfill or the method that arbitrarily abandons
Sand recycling utilization is imperative.
In recent years China's foundry enterprise and R&D institution have carried out the work of substantial amounts of recycling cast waste sand, and recycling cast waste sand takes
Obtaining certain technological achievement, the most representative recycling cast waste sand method mainly has two kinds, is full-boiled process and machinery respectively
Renovation process, typical renovation process has: 1. natural gas (LNG) 600-900 DEG C of roasting combines dry method mechanical regeneration；2. wet method is wiped
Wash and combine full-boiled process drying regeneration.
Natural gas (LNG) is although 600-900 DEG C of roasting combines the renovation process acquisition of dry method mechanical close to roughing sand quality water
Flat reclaimed sand, but owing to sintering temperature is low, it is impossible to destroying two English presomas contained in cast waste sand, China to be reached is new
Under environmental regulation, the tightest exhaust emission standard must increase exhaust treatment system as loaded down with trivial details in RTO, RCO, DBD etc., and this not only increases
Added regeneration put into and operating cost, and the organic gas VOCs of tail gas (phenols, aldehydes, esters, cyanogen class, high-boiling hydrocarbon,
Alcohols, Hydrocarbon etc.) discharge index also is difficult to reach domestic 20mg/m3The tightest standard.Additionally for ensureing reclaimed sand
Quality, follow-up needs increase the dry method mechanical regeneration technologies such as centrifugal, grinding, cause regenerating the response rate and (account for antiquated sand total less than 70%
Amount, simple LNG thermal reclamation can realize 85%), produce a large amount of fine powders of more than 25%, need to carry out filling or ceramic treatment
Recycling, this is disadvantageous to cost and the recycling of recycling cast waste sand.
Guangxi Yulin Yuchai industrial chemical company limited has applied for " recycling cast waste sand reuse method and equipment " in 2013
Patent of invention, application number: 201310281323.8, it is proposed that a kind of recycling cast waste sand reuse method, comprise the following steps:
The pre-treatment of antiquated sand: former antiquated sand removes waste and old rubbish by closed grid unloader, is then passed through suspended magnetic separator and removes
Scrap iron, then remove bulky grain antiquated sand through linear vibrating screen, remove waste iron filing finally by through magnetic separator, enter antiquated sand storage
Tank is deposited；The method is that a kind of wet method scouring combines full-boiled process, and the reclaimed sand product drying regeneration acquisition reaches or is better than roughing sand matter
Amount level, although the regeneration response rate reaches 80%, there is not exhaust emissions problem, but wet reclamation needs to increase relatively complicated
Water circulation processing system and sludge deep process recycling technique, and mud is cast factory and recycles less than 1/3, and residue 2/3 can only
Being utilized or ceramic treatment by low values such as brickmaking factories, this both increases step for regeneration and cost burden.
Summary of the invention
The purpose of this utility model is to provide the regeneration equipment of a kind of cast waste sand, relates to a kind of to cast waste sand money
Source, the regeneration of innoxious, efficient hot plasma, it is adaptable to foundry resin antiquated sand, wet type antiquated sand, waterglass antiquated sand, nothing
The recycling cast waste sand that machine resin antiquated sand and both the above or multiple antiquated sand mix.
Further investigate in order to achieve the above object, found that: cast waste sand enters thermal plasma torch, surface
By transient heating to high temperature, the resin molding on antiquated sand surface is cracked into gas and thoroughly removes, the inoranic membrane on antiquated sand surface and sand
Thermal shock is occurred to come off the metals such as removal, the sodium of antiquated sand surface attachment, potassium when moment rises to high temperature owing to the coefficient of expansion is different
Oxide impurity can because high-temperature fusion volatilization remove, due to this discovery thus complete the purpose of this utility model.
The generating apparatus again of cast waste sand hot plasma of the present utility model: include knockout bed, screening machine, pulverizer, magnetic
Machine, cleaner unit, antiquated sand tank, heat plasma generator, boiling is selected to fluidize cooling bed and reclaimed sand finished pot；Knockout bed connects screening
Linking antiquated sand tank after machine, pulverizer and magnetic separator, tiny dust connects cleaner unit, and antiquated sand tank connects the charging of heat plasma generator
Mouthful, heat plasma generator outlet connects boiling fluidisation cooler, then connects screening machine entrance reclaimed sand finished pot and provides Foundry Works
Reuse；Heat plasma generator entrance is connected to air or noble gas conveying pipe.
Above-described heat plasma adds the back segment of thermal bake-out antiquated sand and is provided with water-cooling jacket cooling.
It is cooling bed that above-described boiling fluidisation cooler is provided with boiling fluidisation, and boiling fluidizes cooling bed bottom air blast
Machine, advertises boiling by antiquated sand, and boiling fluidizes cooling bed top has exhaustor to lead to pulse dust collector.
Described heat plasma generating means includes commutator, manostat, heat plasma generator and heat plasma burning
Room；The import of described heat plasma generator has the outlet of compressed air or inert gas entrance, heat plasma generator to be
Heat plasma combustor, antiquated sand hopper is arranged between the outlet of heat plasma generator and heat plasma combustor；Heat wait from
Sub-combustor upper outlet has air-introduced machine, and by fine ash dirt pump-and-treat system, under heat plasma combustor, outlet connects screening machine；Heat plasma
There is water-cooling jacket in the surrounding of combustor.
The said equipment processes the technique of antiquated sand:
(1) pretreatment
Cast waste sand is screened, broken, magnetic separation and dust-removing process, obtains the pretreatment antiquated sand of particle diameter≤2mm, by pretreatment
Antiquated sand is stored in antiquated sand tank；
(2) hot plasma roasting
Air-flow is passed through in heat plasma generator, under high-tension effect, produce plasma, formed high temperature heat wait from
Daughter torch, pretreatment antiquated sand is entered in thermal plasma torch by dosing, high temperature, thermal shock, melt surface effect under
Removing the resin molding of its surface adhesion, inoranic membrane, metal-oxide and impurity, heat plasma generator voltage is 500-5000V,
Thermal plasma torch mean temperature 2000-4500 DEG C, antiquated sand surface temperature 1000-3000 DEG C, antiquated sand heat time heating time is that 5-60 divides
Clock；Tail gas and the cooled cooling of fine powder that roasting produces are drawn by exhaust blower；
(3) cooling
Through the sand of hot plasma roasting, it is cooled to room temperature；
(4) screening
Sand after cooling enters sizing machine and carries out the screening high performance reclaimed sand of acquisition, and is stored in reclaimed sand
Finished pot；
The air-flow that above step (2) air-flow is passed through in plasma generator is air or noble gas, such as nitrogen, argon
Gas, helium etc..
The power of above step (2) heat plasma generator is 103-106W.The highest power enough produces 2000-
The high temperature of 4500 DEG C.
The renovation process of cast waste sand hot plasma described in the utility model, can process foundry resin antiquated sand,
The application of the regeneration of wet type antiquated sand, waterglass antiquated sand, inorganic resin antiquated sand and both the above or multiple antiquated sand mixing cast waste sand.
Hot plasma described in the utility model, is by particle combinations such as electronics, ion, atom, molecule or free radicals
The electric neutrality aggregation become, is part or all of ionized gas.It is by gas under the effect of high voltage (500-5000 volt)
Volume ionization becomes plasmoid, temperature to be up to more than 2000-5000 DEG C.
Ion, electronics, excited atom, molecule and free radical in plasma is all as lively as a cricket reactive species,
Make the reaction being difficult under usual conditions or speed is the slowest become very rapid, be particularly suitable for the process of pollutant.
Hot plasma high temperature incineration melt process technology is the new technique grown up nearly more than ten years, because of heat etc. from
Daughter arc extreme temperatures, energy concentrate characteristic, pollutant are had the highest treatment effeciency, be especially suitable for intractable dirt and
There are the pollutant of particular/special requirement, such as low and intermediate level radioac, PCBs, asbestos etc..The countries such as the U.S., Russia, Japan, Korea S
Research and Preliminary Applications show plasma high-temperature burn melt process technology because of its equipment volume little, processing speed is fast, energy
Enough processing various refuse, volume reduction ratio is high and molten product is stable, and the advantages such as investment operating cost is relatively low become low
Put one of the most rising technology of refuse process field.
This utility model advantage is:
1, cast waste sand contains the harmful substances such as resin molding, inoranic membrane and the metal-oxide such as sodium, potassium, antiquated sand heat etc. from
Under the common effect of daughter high temperature, thermal shock and melted volatilization, no matter antiquated sand surface organic impurities or inorganic impurity can go
Except more thorough, reclaimed sand surface more rounding, activity is higher, and combination property is the most excellent, and the response rate is up to more than 85%, this
Be current all renovation process and equipment do not caned than；
Extremely toxic material all quilts such as 2, the gas that regenerative process produces is under high temperature and ionization, two English presomas
Cracking destroys, and exhaust emissions index is far below China and the tightest standard of America and Europe, it is not necessary to increase loaded down with trivial details exhaust gas aftertreatment system,
Reduce investment and operating cost；
3, fine powder quantity other renovation process on year-on-year basis that regenerative process produces is greatly decreased, and is turned into through high temperature and ion
With, it is free of contamination and environmentally safe, can recycle directly as the inserts etc. of construction material, reduce casting
Make antiquated sand comprehensive utilization of resources cost；
4, recycling cast waste sand equipment of the present utility model than other again generating apparatus the most brief, regeneration efficiency is higher；
5, the recycling cast waste sand equipment of the present utility model regeneration response rate >=85% (accounting for antiquated sand total amount), reclaimed sand technology
Index is better than homology fresh sand and other renovation process, is entirely capable of being cast factory's cycling and reutilization, during exhaust emissions index is far below
The tightest discharge standards of state such as state and America and Europe, produced fine powder quantity is greatly decreased, and through high temperature and ionization, is nothing
That pollute and environmentally safe, can recycle directly as construction material so that recycling cast waste sand has higher resource
Change utilization rate.
6, recycling cast waste sand equipment of the present utility model be applicable to but be not limited only to foundry resin antiquated sand, wet type antiquated sand,
Waterglass antiquated sand, inorganic resin antiquated sand and both the above or the regeneration of multiple antiquated sand mixing cast waste sand.
Accompanying drawing explanation
Fig. 1 is equipment flowsheet of the present utility model.
Fig. 2 is the plasma generator structure chart that heat plasma adds thermal bake-out antiquated sand process.
The parts that in figure, sequence number is relative: 1, knockout bed, 2, screening machine, 3, magnetic separator, 4, cleaner unit (1), 5, pulverizer, 6,
Antiquated sand tank, 7, heat plasma firing chamber, 8, fine powder collector, 9, cleaner unit (2), 10, boiling fluidisation cooling bed, 11, reclaimed sand
Finished pot, 12, reclaimed sand screening machine；13, commutator；14, manostat, 15, compression gas tank, 16, heat plasma generator,
17, water-cooling jacket, 18, air-introduced machine.
Shown in Fig. 1, the equipment that the renovation process of cast waste sand hot plasma uses includes knockout bed 1, screening machine 2, powder
Broken machine 5, magnetic separator 3, cleaner unit (1), antiquated sand tank 6, heat plasma generating means, boiling fluidisation cooling bed 10 and reclaimed sand become
Product tank 11；Antiquated sand tank 6 linked by knockout bed 1 after connecing screening machine 2, pulverizer 5 and magnetic separator 3, tiny dust connects cleaner unit, antiquated sand
Tank 6 connects the charging aperture of heat plasma generating means, and the outlet of heat plasma generating means connects boiling fluidisation cooling bed 10, then connects
Raw screening machine 12 enters reclaimed sand finished pot 11 provides Foundry Works to reuse；Heat plasma generator entrance is connected to air or lazy
Property air shooter.
Shown in Fig. 2, described heat plasma generating means includes commutator 13, manostat 14, heat plasma generator 16
With heat plasma combustor；The import of described heat plasma generator has compressed air or inert gas entrance, heat plasma
The outlet of generator is heat plasma firing chamber, and antiquated sand hopper is arranged on outlet and the heat plasma roasting of heat plasma generator 16
Burn between room 7；Heat plasma firing chamber 7 upper outlet has air-introduced machine 18, by fine ash dirt pump-and-treat system, 7 times, heat plasma firing chamber
Outlet connects screening machine；There is water-cooling jacket 17 in the surrounding of heat plasma firing chamber 7.
Subordinate list explanation
Table 1 is that mixed type wet type antiquated sand regeneration techniques index of the present utility model contrasts table.
Table 2 is that alkalescent phenol resin antiquated sand regeneration techniques index of the present utility model contrasts table.
Table 3 is that precoated sand antiquated sand regeneration techniques index of the present utility model contrasts table.
Table 4 is recycling cast waste sand exhaust emissions index table of the present utility model.
Detailed description of the invention
Below in conjunction with detailed description of the invention, this utility model is described in further detail, but this should be interpreted as this
The scope of the above-mentioned theme of utility model is only limitted to following example, and all technology realized based on this utility model content belong to
Scope of the present utility model.
Embodiment 1
The regeneration of mixed type wet type antiquated sand hot plasma, comprises the following steps that:
(1) pretreatment
The wet type antiquated sand (be called for short " mixed type wet type antiquated sand ") penetrating into resin sand core is screened, broken, magnetic separation, dedusting etc. are pre-
Treatment process, obtains the pretreatment antiquated sand of particle diameter 1.5mm, and pretreatment antiquated sand is stored in antiquated sand tank.
(2) hot plasma roasting
Pretreatment antiquated sand enters heat plasma generator by dosing and carries out roasting, and heat plasma generator voltage is
800V, thermal plasma torch temperature 2500 DEG C, antiquated sand surface temperature 1500 DEG C, antiquated sand heat time heating time is 15 minutes, and roasting produces
Tail gas and the cooled cooling of fine powder directly by pulse dust collector process get final product qualified discharge, need not do tail gas concentrate secondary combustion
The post processings such as burning, concrete exhaust emissions situation refers to table 4.
(3) cooling
Through the sand of heat plasma generator roasting, entering and fluidizing fluid-bed be cooled to 33 DEG C, fluidizing fluid-bed aerofluxus is led to
Extra pulse cleaner unit processes qualified discharge.
(4) screening
Sand entrance sizing machine after cooling carries out screening and obtains reclaimed sand, and reclaimed sand is stored in reclaimed sand finished product
Tank.
Concrete regeneration techniques index is shown in Table 1.
Comparative example 1
Mixed type wet type antiquated sand wet reclamation, comprises the following steps that:
(1) pretreatment: with embodiment 1.
(2) wet reclamation
Pretreatment antiquated sand is cleaned cylinder group continuously by dosing entrance wet method and is carried out mechanical scrub, and the scouring time is 40 points
Clock, produces sewage and processes Posterior circle use through water treatment system, and the mud of generation is pressed into filter cake and comprehensively utilizes.
(3) dry, cool down
Damp sand enters natural gas three backhaul drying roller, toasts 5 minutes, then carry out by embodiment 1 method at 300 DEG C
Cooling.
(4) screening: with embodiment 1.
Concrete regeneration techniques index is shown in Table 1.
Embodiment 2
The regeneration of alkalescent phenol resin antiquated sand hot plasma, comprises the following steps that:
(1) pretreatment: with embodiment 1.
(2) hot plasma roasting
Pretreatment antiquated sand enters heat plasma generator by dosing and carries out roasting, and heat plasma generator voltage is
2000V, thermal plasma torch temperature 3500 DEG C, antiquated sand surface temperature 1800 DEG C, antiquated sand heat time heating time is 15 minutes, and roasting produces
Tail gas and the cooled cooling of fine powder directly by pulse dust collector process get final product qualified discharge, need not do tail gas concentrate secondary combustion
The post processings such as burning, concrete exhaust emissions situation refers to table 4.
(3) cooling: with embodiment 1.
(4) screening: with embodiment 1.
Concrete regeneration techniques index is shown in Table 2.
Comparative example 2
Alkalescent phenol resin antiquated sand natural gas full-boiled process combines machinery regeneration, comprises the following steps that:
(1) pretreatment: with embodiment 1.
(2) natural gas (LNG) full-boiled process roasting
Pretreatment antiquated sand enters natural gas fluidized-solids roaster by dosing and carries out roasting, furnace temperature 750 DEG C, antiquated sand table
Surface temperature 700 DEG C, antiquated sand heat time heating time is 45 minutes, after the concentrated second-time burning of tail gas that roasting produces processes (RTO/RCO)
Cooled cooling processes qualified discharge by pulse dust collector again together with fine powder.
(3) cooling: with embodiment 1.
(4) dry method mechanical regeneration
Cooled sand enters centrifugal regenerating device and carries out machinery regeneration, and centrifugal linear velocity is 3000r/min.
(5) screening: with embodiment 1.
Concrete regeneration techniques index is shown in Table 2.
Embodiment 3
The regeneration of precoated sand antiquated sand hot plasma, comprises the following steps that:
(1) pretreatment: with embodiment 1.
(2) hot plasma roasting
Pretreatment antiquated sand enters heat plasma generator by dosing and carries out roasting, and heat plasma generator voltage is
5000V, thermal plasma torch temperature 3000 DEG C, antiquated sand surface temperature 1200 DEG C, antiquated sand heat time heating time is 10 minutes, and roasting produces
Tail gas and the cooled cooling of fine powder directly by pulse dust collector process get final product qualified discharge, need not do tail gas concentrate secondary combustion
The post processings such as burning, concrete exhaust emissions situation refers to table 4.
(3) cooling: with embodiment 1.
(4) screening: with embodiment 1.
Concrete regeneration techniques index is shown in Table 3.
Comparative example 3
Precoated sand antiquated sand natural gas thermal reclamation, comprises the following steps that:
(1) pretreatment: with embodiment 1.
(2) natural gas (LNG) full-boiled process roasting: with comparative example 2.
(3) cooling: with embodiment 1.
(4) screening: with embodiment 1.
Concrete regeneration techniques index is shown in Table 3.
Table 1: mixed type wet type antiquated sand regeneration techniques index contrast table
Note: method of analyzing is by standard GB/T/T7143 2010
Table 2: alkalescent phenol resin antiquated sand regeneration techniques index contrast table
Note: method of analyzing is by standard GB/T/T7143 2010
Table 3: precoated sand antiquated sand regeneration techniques index contrast table
Note: method of analyzing is by standard GB/T/T7143 2010
Table 4: recycling cast waste sand exhaust emissions index table
Note: indicate (Holland XX) and represent American-European countries's the tightest discharge standard higher limit, do not mark item and American-European countries's standard one
Cause.
Claims (3)
1. the generating apparatus again of a cast waste sand hot plasma, it is characterised in that: include knockout bed, screening machine, pulverizer, magnetic
Select machine, cleaner unit, antiquated sand tank, heat plasma generating means, boiling fluidisation cooler and reclaimed sand finished pot；Knockout bed connects sieve
Linking antiquated sand tank after extension set, pulverizer and magnetic separator, tiny dust connects cleaner unit, and antiquated sand tank connects heat plasma generating means
Charging aperture, the outlet of heat plasma generating means connects boiling fluidisation cooler, then connects screening machine and enters the offer of reclaimed sand finished pot
Foundry Works reuses；Heat plasma generator entrance is connected to air or noble gas conveying pipe.
The generating apparatus again of cast waste sand hot plasma the most according to claim 1, it is characterised in that: described boiling stream
It is cooling bed that change cooler is provided with boiling fluidisation, and aerator is arranged at the cooling bed bottom of boiling fluidisation, and antiquated sand is advertised boiling, and seethe with excitement stream
Changing cooling bed top has exhaustor to lead to pulse dust collector.
The generating apparatus again of cast waste sand hot plasma the most according to claim 1, it is characterised in that: described heat wait from
Sub-generating means includes commutator, manostat, heat plasma generator and heat plasma combustor；Described heat plasma occurs
The import of device has the outlet of compressed air or inert gas entrance, heat plasma generator to be heat plasma combustor, antiquated sand material
Bucket is arranged between the outlet of heat plasma generator and heat plasma combustor；Heat plasma combustor upper outlet has air inducing
Machine, by fine ash dirt pump-and-treat system, under heat plasma combustor, outlet connects screening machine；The surrounding of heat plasma combustor has water-cooled to press from both sides
Set.
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| CN201520806196.3U CN205702298U (en) | 2015-10-19 | 2015-10-19 | The generating apparatus again of cast waste sand hot plasma |
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| CN201520806196.3U CN205702298U (en) | 2015-10-19 | 2015-10-19 | The generating apparatus again of cast waste sand hot plasma |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022011985A1 (en) * | 2020-07-13 | 2022-01-20 | 太原理工大学 | Foundry waste sand recycling method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022011985A1 (en) * | 2020-07-13 | 2022-01-20 | 太原理工大学 | Foundry waste sand recycling method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180426 Address after: 537005 north side of casting center of Yuchai Potang Industrial Park, Yulin, the Guangxi Zhuang Autonomous Region Patentee after: Guangxi orchid Resource Recycling Co., Ltd. Address before: 537000, north of the foundry center of Yuchai Potang Industrial Park, Yulin, the Guangxi Zhuang Autonomous Region, Guangxi orchid Co., Ltd. Patentee before: Dai Weiping |
|
| TR01 | Transfer of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Regeneration equipment of casting waste sand thermal plasma Effective date of registration: 20220510 Granted publication date: 20161123 Pledgee: Bank of Guilin Co.,Ltd. Yulin Branch Pledgor: GUANGXI LANCO RESOURCES RECYCLING CO.,LTD. Registration number: Y2022450000069 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |