CN102834180A - Method for sorting combustible waste from construction waste - Google Patents
Method for sorting combustible waste from construction waste Download PDFInfo
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- CN102834180A CN102834180A CN2011800057856A CN201180005785A CN102834180A CN 102834180 A CN102834180 A CN 102834180A CN 2011800057856 A CN2011800057856 A CN 2011800057856A CN 201180005785 A CN201180005785 A CN 201180005785A CN 102834180 A CN102834180 A CN 102834180A
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- combustible
- sorting
- sorting step
- construction waste
- waste
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/06—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
- B03B9/061—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial
- B03B9/065—General arrangement of separating plant, e.g. flow sheets specially adapted for refuse the refuse being industrial the refuse being building rubble
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/58—Construction or demolition [C&D] waste
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/78—Recycling of wood or furniture waste
Abstract
The present invention relates to a method for sorting combustible waste from construction waste, comprising: a large combustible removing step 100 of removing large combustibles from construction waste after sorting recycled aggregates; a combustible sorting step 300 of removing nonflammables from construction waste and sorting combustibles after removing large combustibles; and a wood sorting step 400 of sorting wood from the combustibles; whereby efficiently sorting combustibles such as wood and the like from construction waste, solving problems of shortage of landfill, and enabling the sorted combustibles to be re-used as fuel.
Description
Technical field
The present invention relates to building, environmental area, relate to a kind of method that the combustible waste that is included in the construction waste is carried out sorting in more detail.
Background technology
Construction waste by the generations such as dismounting of other building of building can roughly be divided into combustible and incombustible; Present situation is that the aggregate (regeneration aggregate) that wherein circulates carries out sorting through the intermediate treatment merchant; Easily a part of combustible of sorting is by burning disposal, and the most of combustible and the incombustible that are difficult to carry out sorting carry out landfill at landfill yard.
The construction waste of analysis cycle aggregate after by sorting, report have and comprise 25% wood type, other combustible of 30%, 45% incombustible etc. (capital circle landfill yard management company, 2010)
That is, present situation be comprise 55% degree with the construction waste of the combustible state headed by the wood type by direct landfill in landfill yard.
But by having been pointed out following problem: combustibles such as this wood type are big than bulking value, therefore not only take too much landfill space, although and its be enough to fuel feedback as thermal power generation etc., but directly by landfill.
Summary of the invention
The technical problem that solves
The present invention proposes in order to solve aforesaid problem; Its purpose is; A kind of combustible waste method for separating of construction waste is proposed; Said method is combustible such as wood type in the sorting construction waste effectively, thereby has solved the shortage problem of landfill yard and made reusing of acting as a fuel become possibility.
Technical scheme
In order to solve said problem, the present invention proposes a kind of combustible waste method for separating of construction waste, comprising: the large-scale combustible of from the construction waste behind the sorting circulation aggregate, removing large-scale combustible is removed step 100; Behind the said large-scale combustible of sorting, from said construction waste, remove the combustible sorting step 300 of incombustible and sorting combustible; The wood type sorting step 400 of sorting wood type from said combustible.
Preferably, said large-scale combustible is removed step 100 and is comprised: move into the step that said construction waste comes in the open the stockyard and stores up in the open; And the step of from the said construction waste of storing up, removing large-scale combustibles such as large-scale timber, clothing in the open through equipment or manpower.
Preferably, between said large-scale combustible removal step 100 and said combustible sorting step 300, also comprise: through the broken step 200 of the impact type of the broken said construction waste of impact crusher.
Preferably, said combustible sorting step 300 comprises: the magnetic force sorting step 310 of removing the iron material class in the said construction waste through magnetic force.
Preferably, after said magnetic force sorting step 310, said combustible sorting step 300 comprises: the rotary screen sorting step 320 of large-scale discarded object being separated with small-sized discarded object through rotary screen.
Preferably, after said rotary screen sorting step 320, said combustible sorting step 300 comprises: said large-scale discarded object is put into tank, and removal is according to the wet separation step 330 of the incombustible and the combustible that sorting floats up of the difference deposition of proportion.
Preferably, after said rotary screen sorting step 320, said combustible sorting step 300 comprises: said small-sized discarded object is implemented the screening sorting step 340 that screening removes fine sandy soil class.
Preferably; After said screening sorting step 340; Said combustible sorting step 300 comprises: will put into rake formula separator through the said small-sized discarded object that said screening sorting step 340 has been removed said fine sandy soil class, the rake through said rake formula separator drives the rake sorting step 350 of removing incombustible and sorting combustible.
Preferably, said wood type sorting step 400 comprises: said combustible is sprayed sorting step 410 through the air that the air jet system injection air removes the light weight combustible.
Preferably, after said air sprayed sorting step 410, said wood type sorting step 400 comprised: through the wood type in the said combustible of optics separator sorting and remove the optics sorting step 440 of other combustible.
Preferably, spray at said air and comprise between sorting step 410 and the said optics sorting step 440 said combustible is applied the hot blast sorting step 430 that high-temperature hot-air removes the light weight combustible.
Preferably, said air sprays between sorting step 410 and the said hot blast sorting step 430 and comprises: through the cutting type breaking step 420 of the said combustible of cutting type breaking crusher machine.Beneficial effect
The present invention proposes a kind of combustible waste method for separating of construction waste, said method is the combustibles such as wood type in the sorting construction waste effectively, thereby have solved the shortage problem of landfill yard and made the utilization again that acts as a fuel become possibility.
Description of drawings
Show embodiments of the invention below Fig. 1, wherein
Fig. 1 is the structure chart of first embodiment,
Fig. 2 is the structure chart of second embodiment,
Fig. 3 is the sketch map of impact crusher,
Fig. 4 is the sketch map of magnetic force sorting unit,
Fig. 5 is the sketch map of rotary screen,
Fig. 6 is the wet separation schematic representation of apparatus,
Fig. 7 is the sketch map of vibratory sieve,
Fig. 8 is the sketch map of rake formula separator,
Fig. 9 is the stereogram of air knife (Air-knife) type gravity separation device,
Figure 10 is the sketch map of pneumatic separator.
The specific embodiment
Below, with reference to accompanying drawing embodiments of the invention are carried out detailed explanation.
Shown in below Fig. 1, the combustible waste method for separating of construction waste of the present invention comprises basically: the large-scale combustible of from the construction waste behind the sorting circulation aggregate, removing large-scale combustible 1 is removed step 100; Behind the large-scale combustible 1 of sorting, from construction waste, remove the combustible sorting step 300 of incombustible 2 and sorting combustible 3; From combustible 3, remove the wood type sorting step 400 of other combustible 4 and sorting wood type 5.
The method for separating of construction waste has the method for removing incombustible earlier and the method for removing combustible earlier; And the method for removing incombustible earlier is suitable for easily and separating effect is also excellent, thereby after having constituted first sorting incombustible combustible and wood type are carried out separation processes in existing technology.
Large-scale combustible is removed step 100 in order to reduce as the combustible sorting step of operation and the burden of wood type sorting step thereafter, preferably includes: move into the step that there are open storage ground in construction waste and open pile behind the sorting circulation aggregate; And the step of removing large-scale combustibles such as large-scale timber in the said construction waste of storing up, clothing, carpet through equipment such as crane or manpower in the open.
The granularity of construction waste presents the distribution of broad, and this chooses at the separation branch is unaccommodated key element, therefore need seek homogenizing of granularity at technology initial stage configuration disintegrating apparatus.
And; Disintegrating machine has through the impact crusher of impact grinding discarded object and the cutting type pulverizer through cutting machine (blade) shredded waste; And at the technology initial stage; Because discarded object is big or small big many, and comprise the incombustible of a lot of hard rigid material, therefore have the misgivings that the damage of cutting machine takes place use cutting type pulverizer often.
Therefore, preferably, between large-scale combustible removal step 100 and combustible sorting step 300, also comprise: through the broken step 200 of the impact type of the broken construction waste of impact crusher.
Fig. 3 is the sketch map of representative impact crusher 10 in the impact crusher.
Said impact crusher 10 adopts following structure: between impact bar 12 fixing on the rotating shaft 11 and striker plate 13, drop into thing 14, the revolving force through impact bar 12 carries out fragmentation.
The combustible sorting step 300 of removing incombustible and sorting combustible preferably includes magnetic force sorting step 310, and said magnetic force sorting step 310 is removed the iron material class 6 in the construction waste through magnetic force in the early stage.
This is because the iron material class can cause the fault of back segment equipment, therefore is preferably in early stage removal, and because it is the high material of economy, therefore has efficient in damage less state recover.
Fig. 4 is the sketch map of head dummy down
sorting unit in the magnetic force sorting unit.
Preferably, after magnetic force sorting step 310, combustible sorting step 300 preferably includes rotary screen sorting step 320, and said rotary screen sorting step 320 is separated with small-sized discarded object 7b large-scale discarded object 7a through rotary screen.
As shown in Figure 5, rotary screen 30 is meant the device that can classify to discarded object by granule size through the multiple hole 32,33 beaten on the cylindrical drum 31 of rotation.
This not only has the effect that the strand of making discarded object together scatters; And, has the advantage that in subsequent handling, can carry out sorting respectively effectively through partition size big large-scale discarded object (more than the 50mm) and the little small-sized discarded object (below the 50mm) of granularity.
Large-scale discarded object through top rotary screen sorting step 320 sortings; Preferably put it in the tank and and carry out sorting through wet separation step 330; Said wet separation step 330 is: remove the incombustible 9 that the difference according to proportion precipitates, the combustible 3 that sorting floats up.
The removal of the attritive powder that this wet separation method can be used for being difficult to separate through the screening that relies on sieve effectively.
Fig. 6 is the sketch map of wet separation device 40.
The structure of said wet separation device 40 is following: in tank 40a, drop into discarded object through dropping into conveyer 41; Cause flow at high speed through high-pressure pump 44 and high pressure nozzle 45 towards the incidence of discarded object; Discharge conveyer 42 through timber and reclaim the wood type 5 that floats up, discharge conveyer 43 through incombustible and discharge the incombustible that sinks.
Small-sized discarded object by 320 sortings of rotary screen sorting step preferably carries out sorting through screening sorting step 340, and said screening sorting step 340 removes fine sandy soil class 8 through implementing screening.
Granularity is that the discarded object below the 50mm accounts for 57.6% in whole discarded object; Wherein sandy soil reach 32.1%; The brick class reaches 13.9%; With granularity is that fine sandy soil class below the 20mm is separated landfill disposal, also has efficient from the angle of landfill, and has advantage that needing for sorting to avoid the equipment of excessive capacity.
And; In the construction waste; The sandy soil of high humidity are in a large number attached on the big discarded object of timber or granularity; The sandy soil that so adhere to can become the obstructive cause of the efficient of the sorting units of stating after the reduction such as optics separator, are effective with its stabilisation of removing in advance for whole separation system therefore.
For the removal of the fine sandy soil class that more effectively relies on screening, as shown in Figure 7, preferably sieve is vibrated and implement separation operation through vibrating screen device 50 grades.
Vibrating screen device 50 adopts following structure: be obliquely installed the sieve 51,52 of the mesh with multiple size, transfer discarded object and carry out sorting through vibration.
Removed the small-sized discarded object of fine sandy soil through screening sorting step 340 and preferably put into rake formula separator and carry out sorting through rake sorting step 350, said rake sorting step 350 drives removal incombustible and sorting combustible through the rake of rake formula separator.
Rake formula separator (rake) 60 carries out sorting to combustible in the following manner.As shown in Figure 8, transfer discarded objects through conveyer 61, and drive the repetition of (action of sweeping the floor) according to the rake of rakes 62 such as rake 621 or brush 622, sweep and collect the relatively little organic flammable construction waste 3a of weight, and the incombustible 2 that is left of discharge.
Remove incombustible through above-mentioned operation, behind the sorting combustible, sorting wood type once more from combustible.
Such wood type sorting step 400 preferably includes air and sprays sorting step 410, and said air sprays sorting step 410 and for the initial stage combustible removed light weight combustible 3a through the air jet system injection air.
Such air jet system (specific gravity separator) is used for from the combustible specific gravity of separation of sorting and the big relatively wood type of particle, combustible and the big relatively wood types 5 of sorting weight such as the vinyl plastics of feasible removal light weight, fiber.
Air knife type gravity separation device 70 in the air jet system; As shown in Figure 9; Adopt following structure: the construction waste C that is supplied with by air conveyor 71 is fallen through incline conveyer 72, the combustible 3a of the light weight among the construction waste C that relies on 73 landing of air ejection section is risen and removal.
For after effective sorting of passing through hot blast sorting step 430 and optics sorting step 440 of stating; Preferably; To carry out fragmentation through cutting type breaking step 420 by the combustible of elutriation step 410 sorting, said cutting type breaking step 420 is implemented through the cutting type breaking machine.
At the operation initial stage; Owing to comprise the big and hard discarded object of a lot of sizes; Therefore use impact crusher efficient as stated; But removing hard incombustible, is to use in the wood type sorting step of object that to pulverize the cutting type breaking machine of object equably through cutting machine (blade) more efficient with the construction waste that comprises big slight combustible.
After this, preferably, carry out sorting through 430 pairs of combustibles of hot blast sorting step, said hot blast sorting step 430 removes the light weight combustible through applying high-temperature hot-air.
Shown in figure 10; Said process is through pneumatic separator 80 realizations such as grade; Pneumatic separator 80 adopts following structure: drop into the stationery of weight through throw-in part 81; In air chamber 82,, after separating sorting, reclaim stationeries through discharge portion 83 through in air blast and the dry combustible of electric heater generation hot blast.
Light weight materials such as the dust below the 10mm that the specific gravity of separation and particle are relatively little from the combustible of fragmentation, plastic products, vinyl plastics, fiber-like.
Finally, preferably, carry out sorting through optics sorting step 440, said optics sorting step 440 is through optics separator sorting wood type and remove other combustible from combustible.
This is the technology that accurately sub-elects wood type the combustible for size more than the 10mm that is sub-elected by the hot blast sorting step.
The optics separator has near infrared ray sorting unit, X-line sorting unit etc.
Utilize the assorting room of near infrared ray mode to have the advantage that does not receive to be present in the influence of surperficial foreign matter of test portion and moisture and do not need preprocessing process.
Therefore, owing to not too receive external action, the reliability of sorting is high, can carry out nondestructive analysis for the construction waste of multiple proterties, thereby can handle rapidly.
Use the determination method of X-line can roughly be divided into penetrant method, optical spectroscopy and diffraction approach, utilized the absorbing phenomenon to the X-line of object, the emission phenomenon of fluorescence X-line and the scattering phenomenon of X-line respectively.
Wherein, as follows to the explanation of X-line optical spectroscopy.
When giving object illumination X-line, object can be launched the X-line of the natural wavelength that each element had that constitutes object once more.
This phenomenon is that its room is filled up by the electronics of electron orbit outermost (side that energy is high) owing to shine the electronics that the interior atom of the X-line h substance of object has, and energy remaining is released to the X-line and produces.
That is, when the X-line is shone object, the secondary X-line of the peculiar wavelength that each element had that constitutes object can be produced,, the kind of the element of constitute can be known through this X-line is carried out spectrum analysis.
More than just the part of the preferred embodiment that can realize according to the present invention is illustrated; As everyone knows; Scope of the present invention should not be construed as and is limited to above embodiment, and more than the technological thought of the present invention of explanation all should be within the scope of the present invention with the technological thought that is the basis with this technological thought.
Claims (12)
1. the combustible waste method for separating of a construction waste, it comprises:
From the construction waste behind the sorting circulation aggregate, remove the large-scale combustible of large-scale combustible and remove step 100;
Behind the said large-scale combustible of sorting, from said construction waste, remove the combustible sorting step 300 of incombustible and sorting combustible; And
The wood type sorting step 400 of sorting wood type from said combustible.
2. the combustible waste method for separating of construction waste as claimed in claim 1 is characterized in that, said large-scale combustible is removed step 100 and comprised:
Move into the step that said construction waste comes in the open the stockyard and stores up in the open; And
From the said construction waste of storing up, remove the step of large-scale combustibles such as large-scale timber, clothing in the open through equipment or manpower.
3. the combustible waste method for separating of construction waste as claimed in claim 1; It is characterized in that, between said large-scale combustible removal step 100 and said combustible sorting step 300, also comprise: through the broken step 200 of the impact type of the broken said construction waste of impact crusher.
4. the combustible waste method for separating of construction waste as claimed in claim 3 is characterized in that, said combustible sorting step 300 comprises: the magnetic force sorting step 310 of removing the iron material class in the said construction waste through magnetic force.
5. the combustible waste method for separating of construction waste as claimed in claim 4; It is characterized in that; After said magnetic force sorting step 310, said combustible sorting step 300 comprises: the rotary screen sorting step 320 of large-scale discarded object being separated with small-sized discarded object through rotary screen.
6. the combustible waste method for separating of construction waste as claimed in claim 5; It is characterized in that; After said rotary screen sorting step 320; Said combustible sorting step 300 comprises: said large-scale discarded object is put into tank, and removal is according to the wet separation step 330 of the incombustible and the combustible that sorting floats up of the difference deposition of proportion.
7. the combustible waste method for separating of construction waste as claimed in claim 6; It is characterized in that; After said rotary screen sorting step 320, said combustible sorting step 300 comprises: said small-sized discarded object is implemented the screening sorting step 340 that screening removes fine sandy soil class.
8. the combustible waste method for separating of construction waste as claimed in claim 7; It is characterized in that; After said screening sorting step 340; Said combustible sorting step 300 comprises: will put into rake formula separator through the said small-sized discarded object that said screening sorting step 340 has been removed said fine sandy soil class, the rake through said rake formula separator drives the rake sorting step 350 of removing incombustible and sorting combustible.
9. like the combustible waste method for separating of each described construction waste in the claim 1 to 8; It is characterized in that said wood type sorting step 400 comprises: said combustible is sprayed sorting step 410 through the air that the air jet system injection air removes the light weight combustible.
10. the combustible waste method for separating of construction waste as claimed in claim 9; It is characterized in that; After said air sprayed sorting step 410, said wood type sorting step 400 comprised: through the wood type in the said combustible of optics separator sorting and remove the optics sorting step 440 of other combustible.
11. the combustible waste method for separating of construction waste as claimed in claim 10; It is characterized in that, between said air injection sorting step 410 and said optics sorting step 440, comprise said combustible is applied the hot blast sorting step 430 that high-temperature hot-air removes the light weight combustible.
12. the combustible waste method for separating of construction waste as claimed in claim 11; It is characterized in that said air sprays between sorting step 410 and the said hot blast sorting step 430 and comprises: through the cutting type breaking step 420 of the said combustible of cutting type breaking crusher machine.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2010-0013264 | 2010-02-12 | ||
| KR1020100013264A KR101010247B1 (en) | 2010-02-12 | 2010-02-12 | Sortong method for combustible waste in construction waste |
| PCT/KR2011/000926 WO2011099805A2 (en) | 2010-02-12 | 2011-02-11 | Method for sorting combustible waste from construction waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102834180A true CN102834180A (en) | 2012-12-19 |
| CN102834180B CN102834180B (en) | 2015-07-29 |
Family
ID=43616673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180005785.6A Active CN102834180B (en) | 2010-02-12 | 2011-02-11 | The combustible waste method for separating of construction waste |
Country Status (5)
| Country | Link |
|---|---|
| KR (1) | KR101010247B1 (en) |
| CN (1) | CN102834180B (en) |
| CO (1) | CO6561832A2 (en) |
| WO (1) | WO2011099805A2 (en) |
| ZA (1) | ZA201205694B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108188150A (en) * | 2017-12-29 | 2018-06-22 | 连城县丰海竹木业有限公司 | A kind of bamboo and wood processing industry organic solid castoff sorting disposing system |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701647A (en) * | 2012-01-13 | 2012-10-03 | 深圳市伟沦建材有限公司 | Preparation method of recycled aggregate ready-mixed mortar |
| CN102701622A (en) * | 2012-01-13 | 2012-10-03 | 深圳市伟沦建材有限公司 | Preparation method of recycled aggregate from building wastes |
| CN102701663A (en) * | 2012-01-13 | 2012-10-03 | 深圳市伟沦建材有限公司 | Preparation method of recycled aggregate urban pavement bricks |
| CN102701664A (en) * | 2012-01-13 | 2012-10-03 | 深圳市伟沦建材有限公司 | Recycled aggregate concrete preparation method |
| KR101785962B1 (en) * | 2015-11-30 | 2017-11-15 | 주식회사 부양 | Apparatus for Cleaning Spent Fills with Contamination Measuring Device |
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- 2011-02-11 WO PCT/KR2011/000926 patent/WO2011099805A2/en active Application Filing
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- 2012-08-08 CO CO12133095A patent/CO6561832A2/en active IP Right Grant
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Also Published As
| Publication number | Publication date |
|---|---|
| ZA201205694B (en) | 2013-09-25 |
| WO2011099805A3 (en) | 2012-01-12 |
| CN102834180B (en) | 2015-07-29 |
| CO6561832A2 (en) | 2012-11-15 |
| WO2011099805A2 (en) | 2011-08-18 |
| KR101010247B1 (en) | 2011-01-21 |
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Effective date of registration: 20220427 Address after: Gyeonggi Do, South Korea Patentee after: Insun ENT Co.,Ltd. Patentee after: Korea Construction Technology Research Institute Address before: Inchon, Korea Patentee before: SUDOKWON LANDFILL SITE MANAGEMENT Corp. Patentee before: Dohwa Consulting Engineers Co.,Ltd. Patentee before: Daewoo Engineering & Construction Co.,Ltd. Patentee before: Han Guozonghejishu Patentee before: KOREA INSTITUTE OF CONSTRUCTION TECHNOLOGY Patentee before: Insun ENT Co.,Ltd. |