CN107829348B - Asphalt mixture countercurrent type thermal regeneration tail gas treatment device and method - Google Patents
Asphalt mixture countercurrent type thermal regeneration tail gas treatment device and method Download PDFInfo
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- CN107829348B CN107829348B CN201711331547.XA CN201711331547A CN107829348B CN 107829348 B CN107829348 B CN 107829348B CN 201711331547 A CN201711331547 A CN 201711331547A CN 107829348 B CN107829348 B CN 107829348B
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- tail gas
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- stoving
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/02—Heating arrangements using combustion heating
- F26B23/022—Heating arrangements using combustion heating incinerating volatiles in the dryer exhaust gases, the produced hot gases being wholly, partly or not recycled into the drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/005—Treatment of dryer exhaust gases
- F26B25/007—Dust filtering; Exhaust dust filters
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
Abstract
Asphalt mixture counter-flow type heat regeneration tail gas treatment device, including regeneration stoving heating system, primary drying roller, one-level settling chamber, second grade settling chamber, screw conveyer and promotion conveyor, regeneration stoving heating system includes the combustor, the combustion chamber, discharging case and two sections stoving rollers, the combustion chamber sets up the low level at two sections stoving rollers, one-level settling chamber sets up the high level at two sections stoving rollers, the tail gas entrance point and the tail gas exit linkage of one-level settling chamber of second grade settling chamber, this second grade settling chamber upper portion side is equipped with the draught fan, the air outlet of this draught fan is connected to primary stoving roller, screw conveyer respectively with the granule exit linkage of one-level settling chamber and second grade settling chamber, this screw conveyer's discharge end is connected with two sections stoving rollers through promoting conveyor. The invention improves the filtering efficiency of the tail gas fine powder particles, ensures that the amount of the fine powder particles in the tail gas entering the induced draft fan is reduced to the minimum, and effectively prolongs the service life of the induced draft fan.
Description
Technical Field
The invention relates to the technical field of asphalt tail gas treatment, in particular to a device and a method for treating asphalt mixture countercurrent type thermal regeneration tail gas.
Background
The asphalt mixture thermal regeneration technology is a technology for recycling waste asphalt mixture, and is usually used together with a primary mixing station. The general technological process is that the old asphalt mixture is lifted by a lifter according to the designed grading requirement, is sent into a drying roller for drying and heating, and the dried and heated old asphalt mixture is stored and metered and is mixed with the new asphalt mixture produced by the original mixing station. The drying and heating method mainly comprises forward-flow drying and heating and reverse-flow drying and heating, and a large amount of tail gas can be generated no matter what drying and heating method is adopted, and the tail gas contains a large amount of asphalt smoke and fine powder particles.
In the prior art, the most common tail gas treatment method is that tail gas generated by thermal regeneration is pumped into a primary drying roller through a draught fan, so that asphaltic smoke in the tail gas is secondarily combusted and adsorbed in the primary drying roller, the surface of fine powder particles contains a large amount of asphalt, fan blades are easily worn along with the tail gas after the tail gas is conveyed into the draught fan, the service life of the fan is influenced to overcome the problems, a settling chamber is generally arranged at the front end of an air inlet of the draught fan and used for filtering the fine powder particles in the tail gas, but the bottom of the settling chamber needs to be cleaned frequently, otherwise caking is easily accumulated, the dust removal efficiency of the settling chamber is influenced, and finally the protection of an initiator is invalid.
In addition, once a large amount of fine powder particles are sent into the primary drying roller and mixed with high-temperature new aggregate, the asphalt on the surfaces of the fine powder particles is heated and melted, the adhesiveness is enhanced, the new aggregate is easy to adhere to the positions of a primary equipment chute, a bin body and the like in the running process, regional caking is easy to occur after a certain period of use, the problems of difficult discovery, high cleaning difficulty and the like are solved, the primary equipment cannot normally run when serious problems are caused, and continuous production for a long time cannot be realized.
Disclosure of Invention
The invention provides a device and a method for treating asphalt mixture countercurrent thermal regeneration tail gas, which mainly aim to overcome the defects that a settling chamber of the existing tail gas needs to be cleaned frequently, or caking is easy to accumulate, the dust removal efficiency of the settling chamber is reduced, fine powder particles directly enter a primary drying roller, caking is easy to adhere, the finding is difficult, the cleaning difficulty is high and the like.
The invention adopts the following technical scheme:
asphalt mixture counter-flow type heat regeneration tail gas treatment device, including regeneration stoving heating system and primary drying roller, regeneration stoving heating system includes combustor, combustion chamber, discharging case and two sections stoving rollers, two sections stoving rollers slope sets up, the combustion chamber sets up the low level of two sections stoving rollers is equipped with in this combustion chamber the combustor, this tail gas treatment device still includes one-level settling chamber, one-level tail gas pipeline, second grade settling chamber, draught fan, screw conveyor and promotes conveyor, one-level settling chamber sets up the high level at two sections stoving rollers, the tail gas inlet end of second grade settling chamber passes through one-level tail gas pipeline with the tail gas exit linkage of one-level settling chamber, this second grade settling chamber upper portion side is equipped with the draught fan, the air outlet of this draught fan passes through second grade tail gas pipeline is connected to primary stoving roller, screw conveyor respectively with one-level settling chamber granule export and second grade settling chamber granule export connection, the discharge end of this screw conveyor passes through promote conveyor with two sections stoving rollers are connected.
Further, the primary sedimentation chamber comprises an atmospheric chamber, a small air chamber and a feeding chute, wherein the atmospheric chamber is fixed at the high position of the double-section drying roller, the bottom end of the atmospheric chamber is provided with a particle outlet, the small air chamber is arranged above the atmospheric chamber, the top end of the small air chamber is provided with a tail gas outlet, and the feeding chute is arranged inside the atmospheric chamber and is communicated and connected with the high position of the double-section drying roller.
Further, the secondary sedimentation chamber comprises an inverted conical sedimentation tank and a baffle, a tail gas inlet is formed in the top end of the conical sedimentation tank, a particle outlet is formed in the bottom end of the conical sedimentation tank, the induced draft fan is arranged on the side face of the upper portion of the conical sedimentation tank, the baffle is vertically arranged in the conical sedimentation tank, and the baffle separates the tail gas inlet from the induced draft fan.
Further, the discharging box is arranged at the low position of the double-section drying roller, and the discharging box connects the double-section drying roller with the combustion chamber.
Further, the discharge end of the lifting conveying device is connected to the middle section of the double-section drying roller.
The invention also provides a method for treating the asphalt mixture countercurrent thermal regeneration tail gas, which comprises the following steps: (1) The tail gas enters a first-stage settling chamber along the high-position countercurrent in the double-stage drying roller, most dust particles in the tail gas enter a spiral conveying device from the bottom of the first-stage settling chamber under the action of gravity, and the rest tail gas enters a second-stage settling chamber from a tail gas outlet of the first-stage settling chamber; (2) Dust particles in the tail gas in the secondary sedimentation chamber enter the spiral conveying device from the bottom of the secondary sedimentation chamber under the action of gravity, and the rest tail gas enters the primary drying roller for combustion utilization under the action of a draught fan; (3) And dust particles in the spiral conveying device are conveyed into the double-section drying roller through the lifting conveying device for drying, heating and recycling.
Further, a partition plate is arranged in the secondary sedimentation chamber in the step (2), and an air inlet of the induced draft fan is separated from an air inlet of the secondary sedimentation chamber.
From the above description of the invention, it is clear that the invention has the following advantages over the prior art:
1. the thermal regeneration tail gas treatment device comprises the first-stage sedimentation chamber and the second-stage sedimentation chamber, wherein the two-stage sedimentation chamber improves the filtering efficiency of fine powder particles of the tail gas, and ensures that the amount of the fine powder particles in the tail gas entering the induced draft fan is reduced to the minimum, thereby protecting blades of the induced draft fan and effectively prolonging the service life of the induced draft fan.
2. The fine powder particles settled in the first-stage settling chamber and the second-stage settling chamber are sent back to the middle part of the double-section drying roller for recycling, so that the design grading of the original old asphalt mixture is ensured not to be damaged, and the quality of the finished asphalt mixture is ensured.
3. The device reduces a large amount of manual cleaning work, reduces the failure rate of the primary drying roller and the regenerative drying heating system, improves the stability of equipment, and can realize long-time continuous production.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
Specific embodiments of the present invention will be described below with reference to the accompanying drawings. Numerous details are set forth in the following description in order to provide a thorough understanding of the present invention, but it will be apparent to one skilled in the art that the present invention may be practiced without these details. Well-known components, methods and procedures are not described in detail.
The asphalt mixture countercurrent thermal regeneration tail gas treatment device, referring to fig. 1, comprises a regeneration drying heating system 1, a primary sedimentation chamber 2, a primary tail gas conveying pipeline 3, a secondary sedimentation chamber 4, a secondary tail gas conveying pipeline 5, an induced draft fan 6, a spiral conveying device 7, a lifting conveying device 8 and a primary drying roller 9. The regeneration drying heating system 1 comprises a combustor 11, a combustion chamber 12, a discharge box 13 and a double-section drying roller 14, wherein the double-section drying roller 14 is obliquely arranged, the combustion chamber 12 is arranged at the low position of the double-section drying roller 14, and one end, far away from the low position of the double-section drying roller 14, of the combustion chamber 12 is provided with the combustor 11; a discharge box 13 is arranged at the lower position of the double-section drying roller 14, and the discharge box 13 connects the double-section drying roller 14 with the combustion chamber 12.
Referring to fig. 1, the primary settling chamber 2 includes an atmospheric chamber 21, a small chamber 22 and a feeding chute 23, wherein the atmospheric chamber 21 is fixed at a high position of the dual-section drying drum 14, the bottom end of the atmospheric chamber 21 is provided with a particle outlet, the small chamber 22 is disposed above the atmospheric chamber 21, the top end of the small chamber 22 is provided with a tail gas outlet, and the feeding chute 23 is disposed inside the atmospheric chamber 21 and is connected with the high position of the dual-section drying drum 14 in a communicating manner.
Referring to fig. 1, the secondary sedimentation chamber 4 includes an inverted conical sedimentation tank 41 and a partition plate 42, wherein a tail gas inlet is formed at the top end of the conical sedimentation tank, and the tail gas inlet end is connected with a tail gas outlet of the primary sedimentation chamber 2 through the primary tail gas conveying pipeline 3; the bottom of the cone-shaped sedimentation tank 41 is provided with a particle outlet, the induced draft fan 6 is arranged on the side surface of the upper portion of the cone-shaped sedimentation tank 41, the partition plate 42 is vertically arranged in the cone-shaped sedimentation tank 41, the partition plate 42 separates the tail gas inlet from the induced draft fan 6, and the unsettled tail gas is prevented from being directly sucked into the primary drying roller 9 by the induced draft fan. The air outlet of the induced draft fan 6 is connected to the primary drying roller 9 through a secondary tail gas conveying pipeline 5.
Referring to fig. 1, the above-mentioned screw conveyor 7 is connected to the primary settling chamber particle outlet and the secondary settling chamber particle outlet, respectively, and the discharge end of the screw conveyor is connected to the middle section of the dual-section drying drum through the lifting conveyor.
The method for treating the asphalt mixture countercurrent type thermal regeneration tail gas comprises the following steps: (1) The tail gas enters a first-stage settling chamber along the high-position countercurrent in the double-stage drying roller, most dust particles in the tail gas enter a spiral conveying device from the bottom of the first-stage settling chamber under the action of gravity, and the rest tail gas enters a second-stage settling chamber from a tail gas outlet of the first-stage settling chamber; (2) Dust particles in the tail gas in the secondary sedimentation chamber enter the spiral conveying device from the bottom of the secondary sedimentation chamber under the action of gravity, and the rest tail gas enters the primary drying roller for combustion utilization under the action of a draught fan; (3) And dust particles in the spiral conveying device are conveyed into the double-section drying roller through the lifting conveying device for drying, heating and recycling.
The foregoing is merely illustrative of specific embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modification of the present invention by using the design concept shall fall within the scope of the present invention.
Claims (5)
1. Asphalt mixture counter-flow type heat regeneration tail gas treatment device, including regeneration stoving heating system and primary drying cylinder, regeneration stoving heating system includes combustor, combustion chamber, discharging case and two sections stoving cylinders, two sections stoving cylinder slope sets up, the combustion chamber sets up the low level of two sections stoving cylinders is equipped with in this combustion chamber the combustor, its characterized in that: the device comprises a primary sedimentation chamber, a primary tail gas conveying pipeline, a secondary sedimentation chamber, an induced draft fan, a spiral conveying device and a lifting conveying device, wherein the primary sedimentation chamber is arranged at the high position of a double-section drying roller, the tail gas inlet end of the secondary sedimentation chamber is connected with the tail gas outlet of the primary sedimentation chamber through the primary tail gas conveying pipeline, the induced draft fan is arranged on the side surface of the upper part of the secondary sedimentation chamber, the air outlet of the induced draft fan is connected to the primary drying roller through the secondary tail gas conveying pipeline, the spiral conveying device is respectively connected with the particle outlet of the primary sedimentation chamber and the particle outlet of the secondary sedimentation chamber, and the discharge end of the spiral conveying device is connected with the double-section drying roller through the lifting conveying device; the primary sedimentation chamber comprises an atmospheric chamber, a small air chamber and a feeding chute, wherein the atmospheric chamber is fixed at the high position of the double-section drying roller, the bottom end of the atmospheric chamber is provided with a particle outlet, the small air chamber is arranged above the atmospheric chamber, the top end of the small air chamber is provided with a tail gas outlet, and the feeding chute is arranged in the atmospheric chamber and is communicated and connected with the high position of the double-section drying roller; the secondary sedimentation chamber comprises an inverted conical sedimentation tank and a baffle, a tail gas inlet is formed in the top end of the conical sedimentation tank, a particle outlet is formed in the bottom end of the conical sedimentation tank, the induced draft fan is arranged on the side face of the upper portion of the conical sedimentation tank, the baffle is vertically arranged in the conical sedimentation tank, and the baffle separates the tail gas inlet from the induced draft fan.
2. The asphalt mixture countercurrent thermal regeneration tail gas treatment device according to claim 1, wherein: the discharging box is arranged at the low position of the double-section drying roller, and the discharging box connects the double-section drying roller with the combustion chamber.
3. The asphalt mixture countercurrent thermal regeneration tail gas treatment device according to claim 1, wherein: and the discharge end of the lifting conveying device is connected into the middle section of the double-section drying roller.
4. The method for treating the asphalt mixture countercurrent type thermal regeneration tail gas, which adopts the asphalt mixture countercurrent type thermal regeneration tail gas treatment device as claimed in claim 1, is characterized by comprising the following steps:
(1) The tail gas enters a first-stage settling chamber along the high-position countercurrent in the double-stage drying roller, most dust particles in the tail gas enter a spiral conveying device from the bottom of the first-stage settling chamber under the action of gravity, and the rest tail gas enters a second-stage settling chamber from a tail gas outlet of the first-stage settling chamber;
(2) Dust particles in the tail gas in the secondary sedimentation chamber enter the spiral conveying device from the bottom of the secondary sedimentation chamber under the action of gravity, and the rest tail gas enters the primary drying roller for combustion utilization under the action of a draught fan;
(3) And dust particles in the spiral conveying device are conveyed into the double-section drying roller through the lifting conveying device for combustion utilization.
5. The method for treating the asphalt mixture countercurrent thermal regeneration tail gas according to claim 4, wherein the method comprises the following steps: a partition plate is arranged in the secondary sedimentation chamber in the step (2), and an air inlet of the induced draft fan is separated from an air inlet of the secondary sedimentation chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711331547.XA CN107829348B (en) | 2017-12-13 | 2017-12-13 | Asphalt mixture countercurrent type thermal regeneration tail gas treatment device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711331547.XA CN107829348B (en) | 2017-12-13 | 2017-12-13 | Asphalt mixture countercurrent type thermal regeneration tail gas treatment device and method |
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| Publication Number | Publication Date |
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| CN107829348A CN107829348A (en) | 2018-03-23 |
| CN107829348B true CN107829348B (en) | 2023-07-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108411737B (en) * | 2018-05-08 | 2023-11-14 | 福建省铁拓机械股份有限公司 | Combustion chamber of asphalt mixture thermal regeneration equipment |
| CN109506430A (en) * | 2018-12-10 | 2019-03-22 | 攀枝花钢城集团有限公司 | Wet concentrate dryer |
| CN109763406B (en) * | 2019-01-14 | 2020-11-24 | 宿迁学院 | Environment-friendly asphalt reclaimed material feeding structure |
| CN110280075B (en) * | 2019-01-31 | 2023-09-15 | 河南亚龙智能装备有限公司 | Asphalt reclaimed material heating equipment and heat energy utilization method |
| CN109666498B (en) * | 2019-02-14 | 2024-03-15 | 福建省铁拓机械股份有限公司 | Reclaimed material feeding system and method of asphalt mixing plant |
| WO2023044843A1 (en) * | 2021-09-23 | 2023-03-30 | 湖北富邦科技股份有限公司 | Efficient and rapid drying machine for granulated fertilizer and drying method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5836635B2 (en) * | 1980-07-17 | 1983-08-10 | 株式会社新潟鐵工所 | How to reuse asphalt waste |
| US6656242B1 (en) * | 2002-05-21 | 2003-12-02 | Asphalt Innovators, Inc. | Hot mix asphalt facility |
| JP2006193928A (en) * | 2005-01-12 | 2006-07-27 | Nikko Co Ltd | Asphalt paving waste material regenerative apparatus |
| CN203530816U (en) * | 2013-08-28 | 2014-04-09 | 福建铁拓机械有限公司 | Exhaust gas chamber of plant-mix asphalt thermal regeneration equipment |
| CN203944246U (en) * | 2014-06-20 | 2014-11-19 | 湖南三一路面机械有限公司 | A kind of asphalt heat recycling exhaust gas processing device |
| CN204455766U (en) * | 2015-01-15 | 2015-07-08 | 福建铁拓机械有限公司 | A kind of exhaust treatment system of asphalt regenerative equipment |
| CN205775718U (en) * | 2016-07-14 | 2016-12-07 | 福建铁拓机械有限公司 | A kind of novel asphalt-regenerating material drying system |
| CN208533320U (en) * | 2017-12-13 | 2019-02-22 | 福建铁拓机械有限公司 | The reverse-flow hot recycling exhaust gas processing device of asphalt |
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