CN110280075B - Asphalt reclaimed material heating equipment and heat energy utilization method - Google Patents
Asphalt reclaimed material heating equipment and heat energy utilization method Download PDFInfo
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- CN110280075B CN110280075B CN201910099319.7A CN201910099319A CN110280075B CN 110280075 B CN110280075 B CN 110280075B CN 201910099319 A CN201910099319 A CN 201910099319A CN 110280075 B CN110280075 B CN 110280075B
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- heating roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4218—Influencing the heat transfer which act passively, e.g. isolations, heat sinks, cooling ribs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/48—Removing dust other than cleaning filters, e.g. by using collecting trays
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses asphalt recycling material heating equipment which comprises a smoke collecting box, a heating roller and a hot gas generator, wherein the side wall of the smoke collecting box is communicated with the heating roller, a feeding assembly is arranged in the smoke collecting box, one end of the feeding assembly extends out of the top of the smoke collecting box, and the other end of the feeding assembly extends into the feeding end of the heating roller through the side wall of the smoke collecting box; the heating roller is arranged on a frame, and the driving device arranged on the frame enables the heating roller to keep a rotating state when in work; the top of the smoke collecting box is also connected with a dust settling chamber through an induced air pipe, and the side wall of the dust settling chamber is sequentially connected with an induced draft fan and a hot gas generator through the induced air pipe. Compared with the prior art, the hot gas generator and the heating roller are mutually independent, and reclaimed materials are not directly radiated by flame, so that asphalt aging is prevented; meanwhile, the tail gas is recycled, and the heat energy can be utilized to the greatest extent by adopting a method of heating the heat conducting oil through heat radiation, so that the purposes of energy conservation and environmental protection are achieved.
Description
Technical Field
The invention relates to the technical field of recycling of asphalt reclaimed materials, in particular to asphalt reclaimed material heating equipment and a heat energy utilization method.
Background
The existing asphalt thermal regeneration equipment mainly uses a regeneration roller to heat regenerated materials, because of the limitation of factors such as an asphalt recycling material heating method, a regeneration roller structure and the like, the existing regeneration adding proportion is low, asphalt aging and low thermal efficiency in thermal regeneration are low, and blue smoke treatment problems generated in the asphalt recycling material heating process are still more remarkable, and particularly the thermal efficiency is low, which is a problem faced by most other manufacturers.
The current thermal regeneration of most manufacturers is also a concurrent heating structure, which is divided into two types: one is a structure with a combustion chamber, which is used for converting open fire of the burner into hot gas to heat the regenerated material; the other is that the burner is directly connected with the regeneration roller to heat the regeneration material. In other manufacturers' counter-current regenerator drum configurations, a combustion chamber is added to the end of the drum that is identical to the combustion chamber of the counter-current regenerator drum, except that the combustion chamber is moved from one end to the other. In these structures, the structure of the combustion chamber is very simple, but a straight cylindrical structure is low in heat efficiency, and the heating effect is general, so that further improvement is needed.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide asphalt reclaimed material heating equipment which is reasonable in structure and high in system heat efficiency, and can effectively improve heat regeneration capacity and heat regeneration addition proportion.
Another object of the present invention is to provide a method for utilizing heat energy of an asphalt recycling material heating apparatus.
In order to achieve the above purpose, the invention adopts the following technical scheme: the asphalt recycling material heating equipment comprises a smoke collecting box, a heating roller and a hot gas generator, wherein the side wall of the smoke collecting box is communicated with the heating roller, a feeding assembly is arranged in the smoke collecting box, one end of the feeding assembly extends out of the top of the smoke collecting box, and the other end of the feeding assembly extends into the feeding end of the heating roller through the side wall of the smoke collecting box; the heating roller is arranged on a frame, and the driving device arranged on the frame enables the heating roller to keep a rotating state when in work; the top of the smoke collecting box is also connected with a dust settling chamber through an induced air pipe, and the side wall of the dust settling chamber is sequentially connected with an induced draft fan and a hot gas generator through the induced air pipe; the inside internal combustion chamber that is equipped with of steam generator, constitute outer combustion chamber between internal combustion chamber and the steam generator inner wall, the inside reversing mechanism and the conduction oil circulation pipeline of still being equipped with respectively of steam combustor, internal combustion chamber one end outwards is connected with the combustor, and steam generator top export is connected with the ejection of compact subassembly of heating roller.
Further, the hot gas generator is arranged independently of the heating roller, and works through the burner, so that the hot gas generated by the hot gas generator is led into the heating roller through a guiding pipe.
The heating roller is inclined 3 degrees with the horizontal plane to form high-low arrangement, the high part is a feeding end, and the low part is a discharging end.
The top of the smoke collecting box is also provided with a smoke discharge port of the dust settling chamber, and the bottom of the smoke collecting box is provided with an ash discharge port.
The bottom of the dust settling chamber is provided with a solid particle outlet, one end of the dust settling chamber is also provided with a dust outlet, and the dust outlet is communicated with the dust removal system.
The heat conducting oil circulating pipeline is spirally arranged on the outer layer of the inner combustion chamber.
When the device works, the burner is started, the emitted high-temperature flame is converted into high-temperature air flow in the inner combustion chamber, the high-temperature air flow enters the heating roller through the induced air pipe, at the moment, the feeding component is used for feeding materials, the tail end of the feeding component enters the heating roller, the driving device drives the heating roller to rotate so that materials in the roller body move from the feeding end to the discharging end, the high-temperature air flow in the heating roller heats the materials in the heating roller, generated tail gas sequentially enters the smoke collecting box, the dust settling chamber and the hot air generator through the ash discharge port at the bottom of the smoke collecting box, larger particles in the tail gas are discharged, the rest of the tail gas enters the dust settling chamber through the solid particle outlet, the dust is discharged outside through the connecting dust removing system, the rest of the tail gas enters the hot air generator through the induced air pipe, the high-temperature flame in the inner combustion chamber reversely enters the outer combustion chamber through the reversing mechanism after reaching the end of the hot air generator, the harmful components in the tail gas enter the outer combustion chamber to be burnt after contacting with the high-temperature flame, the tail gas is heated again through the heat radiation of the inner combustion chamber in the advancing process, one part of the heat radiation of the outer layer is radiated to the most part of the tail gas, the heat is taken away from the heat conducting layer in the heat conducting layer and the heat conducting layer is taken away to the heat insulating layer, the heat insulating layer is further coated on the heat insulating layer, the heat insulating layer is further heated, the heat insulating layer is formed, and the heat insulating layer is wrapped.
The tail gas exhausted by the heating roller is mixed with hot gas generated by the burner in the hot gas generator in a spiral progressive mode, so that high-temperature air flow of about 650 ℃ is generated, then the high-temperature air flow is guided into the heating roller through the pipeline to heat the reclaimed materials, meanwhile, the spiral heat conduction oil pipeline is attached to the outer wall of the inner barrel of the hot gas generator, heat energy radiated by the hot gas generator can be greatly absorbed by the heat conduction oil circulating in the pipeline, and heat insulation rock wool with a certain thickness is filled between the heat conduction oil pipeline and the outer heat insulation layer to fully reduce heat energy dissipation.
In the invention, the hot air generator is not arranged at the end part of the roller like other factories after the feeding component feeds the materials and is directly connected with the roller, meanwhile, the hot air generator works in a fixed mode, and only one high-temperature-resistant induced air pipe is communicated between the hot air generator and the roller, so that the respective components can fully exert the respective effects by a complete independent structure.
The induced air pipeline is communicated with the hot gas generator to send the tail gas into the hot gas generator, the temperature in the hot gas generator is above 650 ℃, the tail gas needs to stay for a certain time (more than or equal to 1 second) in the high-temperature environment, and the gas stays for more than 1 second in the hot gas generator in a spiral circulation mode, so that the problem of providing a heat source for the reclaimed materials is creatively solved, and the emission is reduced to the minimum.
The heat energy utilization method of the asphalt reclaimed material heating equipment is characterized by comprising the following steps of:
1) Asphalt reclaimed materials enter a heating roller through a feeding component;
2) The driving device drives the heating roller to rotate, asphalt reclaimed materials entering the heating roller are lifted to a certain height by the rotation of the heating roller and then fall down to form a material curtain to move towards the discharge end, and heat exchange is fully carried out with high-temperature air flow of the hot air generator in the process;
3) Hot air generated by the burner enters the heating roller through the hot air generator, fully contacts with the asphalt recycling material, is heated uniformly, and enters the roller to move relatively to contact with the asphalt recycling material flow after passing through the pipeline;
4) And flue gas generated in the heating roller is introduced into the dust settling chamber through the smoke collecting box, after solid particles are primarily settled and filtered, the flue gas is introduced into the hot gas generator through the induced draft fan, and the flue gas is fully mixed with high-temperature air flow generated by the burner in the hot gas generator in a spiral progressive mode, and then enters the regeneration roller again to heat materials, so that the effective utilization of heat energy is satisfied.
Compared with the prior art, the burner has a complex internal structure, the two layers of heat exchange chambers are arranged in the burner, the first layer mainly provides a space for full combustion for the burner, high-temperature hot gas after full combustion advances in the generator in a spiral circulation mode, when the high-temperature hot gas reaches the end part, the high-temperature hot gas reversely enters the outer combustion chamber through the reversing mechanism, meanwhile, roller tail gas introduced by the induced draft fan is contacted and mixed with the high-temperature hot gas at the position, and especially the heat exchange in the outer combustion chamber not only reduces the working temperature for the inner combustion chamber, but also provides a stable and reliable heat source for circulating oil in the heat conducting oil pipeline in the heat preservation layer.
The hot gas generator is not directly connected with the roller at the end part of the heating roller as in the prior art, and works in a fixed mode, and only one high-temperature-resistant induced air pipeline is communicated with the hot gas generator, so that no special connection exists between the hot gas generator and the drum, the subsequent maintenance and overhaul are greatly facilitated, and in addition, the full independent structure can enable the respective components to fully exert the respective effects.
The invention adopts the hot gas generator and the heating roller to be mutually independent, and reclaimed materials are not directly radiated by flame, so that asphalt aging is prevented; meanwhile, the tail gas is recycled, and the heat energy can be utilized to the greatest extent by adopting a method of heating the heat conducting oil through heat radiation, so that the purposes of energy conservation and environmental protection are achieved.
Compared with the prior art, the invention is different from the prior arrangement mode of integrating the high-temperature flue gas mixing chamber and the roller, the high-temperature flue gas mixing chamber is independent from the roller, the reclaimed materials have no flame radiation, and the asphalt aging condition on the aggregate surface can be completely avoided; the tail gas circulation is adopted, the high-temperature tail gas is recycled to indirectly heat the reclaimed materials, meanwhile, heat radiation is utilized to heat conduction oil in the circulation pipeline, and then the heat energy is utilized to continuously and stably preserve heat at other parts in the regeneration link, so that the heat efficiency is greatly improved, blue smoke generated by drying can be burnt by a burner, the asphalt heat regeneration capacity is further improved, the addition proportion of the reclaimed materials is increased, the emission and the environmental pollution are reduced, and the aim of protecting the environment is achieved.
Drawings
The structure and features of the present invention are further described below with reference to the drawings and examples.
Fig. 1 is a schematic structural view of the present invention.
In FIG. 1, smoke collection box, 2, air induction pipe, 3, hot gas generator, 4, burner, 5, high temperature resistant air induction pipe, 6, frame, 7, gas flow, 8, heat transfer oil flow, 9, asphalt regeneration flow, 10, dust flow, 11, feed assembly, 12, outer combustion chamber, 21, dust settling chamber, 23, induced draft fan, 31, reversing mechanism, 32, heat transfer oil circulation pipe, 33, heat preservation, 34, inner combustion chamber, 35, sealing layer, 61, discharge assembly, 62, heating roller, 63.
Detailed Description
Referring to fig. 1, an embodiment of the invention discloses an asphalt recycling material heating device and a heat energy utilization method thereof, comprising an asphalt recycling material heating roller, wherein the asphalt recycling material heating roller comprises a frame 6, a heating roller 62, a feeding component 11, a discharging component 61, a driving device 63, a burner 4, a hot gas generator 3, an induced draft pipe 2, a dust settling chamber 21, an induced draft fan 23, a heat conducting oil circulating pipeline 32, a heat insulation layer 33, a wind direction redirecting device 31 and an outer layer seal 35, wherein the heating roller 62, the feeding component 11, the discharging component 61, the driving device 63, the burner 4, the hot gas generator 3, the induced draft pipe 2, the dust settling chamber 21, the induced draft fan 23, the heat conducting oil circulating pipeline 32 and the outer layer seal 35 are arranged on the frame;
the heating roller 62 is arranged on the frame 64 in a high-low manner inclined by 3 degrees relative to the horizontal plane, the high end of the heating roller is the smoke collecting box 1, the feeding component 11 is arranged in the heating roller, and the low end of the heating roller is the discharging component 61;
the feeding component 11 is fixed in the smoke collecting box 1, a feeding port is arranged outside the smoke collecting box 1, a smoke discharge port arranged at the top of the smoke collecting box 1 is connected with the dust settling chamber through the air guiding pipe 2, and an ash discharge port is arranged at the bottom of the smoke collecting box;
the driving device 63 drives the heating roller 62 to rotate so that the materials in the roller 12 move from the feeding end to the discharging end;
one air outlet of the hot air generator 3 is connected with a high temperature resistant air guiding pipe 5, the other air outlet is connected with an induced draft fan through the air guiding pipe, the end part of the hot air generator 3 is connected with the burner 4, the heating roller 62 is connected with the hot air generator through the high temperature resistant air guiding pipe 5, and the hot air generator 3 and the roller 62 are not arranged on the same central axis but are arranged at other positions and are fixed;
the heat exchange part in the hot gas generator 3 comprises an inner combustion chamber 34, a reversing mechanism 31, a heat conducting oil circulation pipeline 32, a heat preservation layer 33, a sealing layer 35 and a combustor 4, high-temperature flame of the combustor is converted into high-temperature air flow in the inner combustion chamber 34 during normal operation, after the end part of the high-temperature air flow is mixed with tail gas of a heating roller introduced by an induced draft fan 23, harmful components in the tail gas are burnt and enter an outer combustion chamber 12, the tail gas is heated again by heat radiation of the inner combustion chamber 34 during the advancing process, a part of heat is radiated to the outermost layer, heat radiation energy of the part of heat radiation energy is absorbed by heat conducting oil and the like in the heat conducting oil circulation pipeline wrapped in the outer layer, the absorbed heat radiation energy is guided to other key parts and is subjected to stable heat preservation, and most of heat energy is introduced into the heating roller 62 through the high-temperature resistant induced draft pipe 5 to heat asphalt reworked material;
the tail gas in the roller is firstly collected by the smoke collecting box 1 and is discharged from the lower part of the smoke collecting box, the rest tail gas enters the dust settling chamber 21 through the induced air pipe and then settles the dust with larger particles, and relatively purified hot gas is sent into the hot gas generator 3 for backfire.
The embodiment comprises a method for utilizing heat energy, wherein firstly asphalt reclaimed materials enter a heating roller through a feeding component; secondly, the driving device drives the heating roller to rotate, asphalt reclaimed materials entering the heating roller are lifted to a certain height by the rotation of the heating roller and then fall down to form a material curtain to move towards the discharge end, and heat exchange is fully carried out with high-temperature air flow of the hot air generator in the process; the hot air generated by the burner enters the heating roller through the hot air generator and is fully contacted with the asphalt recycling material and uniformly heated, and the hot air of the hot air generator enters the roller through the pipeline and is in relative motion and contact with the asphalt recycling material flow; finally, flue gas generated in the fourth heating roller is introduced into a dust settling chamber through a smoke collecting box, after solid particles are primarily settled and filtered, the flue gas is introduced into a hot gas generator through a draught fan, and the flue gas is fully mixed with high-temperature air flow generated by a burner in the hot gas generator in a spiral progressive mode, and then enters the regeneration roller again to heat materials, so that the effective utilization of heat energy is met.
The foregoing is merely a few 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 concept should be construed as infringement of the protection scope of the present invention.
Claims (8)
1. The utility model provides a pitch reclaimed materials firing equipment, includes collection smoke box, heating cylinder and steam generator, its characterized in that: the side wall of the smoke collecting box is communicated with the heating roller, a feeding component is arranged in the smoke collecting box, one end of the feeding component extends out of the top of the smoke collecting box, and the other end of the feeding component extends into the feeding end of the heating roller through the side wall of the smoke collecting box; the heating roller is arranged on a frame, and the driving device arranged on the frame enables the heating roller to keep a rotating state when in work; the top of the smoke collecting box is also connected with a dust settling chamber through an induced air pipe, the top of the smoke collecting box is also provided with a smoke discharge port connected with the dust settling chamber, the bottom of the smoke collecting box is provided with an ash discharge port, and the side wall of the dust settling chamber is sequentially connected with an induced draft fan and a hot gas generator through the induced air pipe; an inner combustion chamber is arranged in the hot gas generator, an outer combustion chamber is formed between the inner combustion chamber and the inner wall of the hot gas generator, a reversing mechanism and a heat conduction oil circulation pipeline are also respectively arranged in the hot gas generator, one end of the inner combustion chamber is connected with a burner outwards, and an outlet at the top of the hot gas generator is connected with a discharging component of the heating roller; the hot gas generator is arranged independently of the heating roller and works through the burner, so that the hot gas generated by the hot gas generator is led into the heating roller through a guiding pipe.
2. The asphalt recycling heating apparatus according to claim 1, wherein: the heating roller is inclined 3 degrees with the horizontal plane to form high-low arrangement, the high part is a feeding end, and the low part is a discharging end.
3. The asphalt recycling heating apparatus according to claim 1, wherein: the bottom of the feeding component is also provided with an outlet which leads to a fume discharge port.
4. The asphalt recycling heating apparatus according to claim 1, wherein: the bottom of the dust settling chamber is provided with a solid particle outlet, one end of the dust settling chamber is also provided with a dust outlet, and the dust outlet is communicated with the dust removal system.
5. The asphalt recycling heating apparatus according to claim 1, wherein: the heat conducting oil circulating pipeline is spirally arranged on the outer layer of the inner combustion chamber.
6. The asphalt recycling heating apparatus according to claim 1, wherein: the outer wall of the hot gas generator is provided with a sealing layer, and the outside of the sealing layer is also provided with a heat preservation layer.
7. The asphalt recycling heating apparatus according to claim 1, wherein: the hot gas generator is connected with the heating roller through a high-temperature-resistant air guiding pipe.
8. The method for utilizing heat energy of an asphalt recycling heating apparatus according to claim 1, comprising the steps of:
1) Asphalt reclaimed materials enter a heating roller through a feeding component;
2) The driving device drives the heating roller to rotate, asphalt reclaimed materials entering the heating roller are lifted to a certain height by the rotation of the heating roller and then fall down to form a material curtain to move towards the discharge end, and heat exchange is fully carried out with high-temperature air flow of the hot air generator in the process;
3) Hot air generated by the burner enters the heating roller through the hot air generator, fully contacts with the asphalt recycling material, is heated uniformly, and enters the roller through the pipeline after passing through the pipeline to relatively move and contact with the asphalt recycling material flow;
4) And flue gas generated in the heating roller is introduced into the dust settling chamber through the smoke collecting box, after solid particles are primarily settled and filtered, the flue gas is introduced into the hot gas generator through the induced draft fan, and the flue gas is fully mixed with high-temperature air flow generated by the burner in the hot gas generator in a spiral progressive mode, and then enters the regeneration roller again to heat materials, so that the effective utilization of heat energy is satisfied.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910099319.7A CN110280075B (en) | 2019-01-31 | 2019-01-31 | Asphalt reclaimed material heating equipment and heat energy utilization method |
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| CN201910099319.7A CN110280075B (en) | 2019-01-31 | 2019-01-31 | Asphalt reclaimed material heating equipment and heat energy utilization method |
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| CN110280075A CN110280075A (en) | 2019-09-27 |
| CN110280075B true CN110280075B (en) | 2023-09-15 |
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| CN113663419A (en) * | 2021-09-08 | 2021-11-19 | 四川金汇能新材料股份有限公司 | Tail gas treatment equipment |
| 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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