WO2020098589A1 - 沥青站烘干滚筒烟气余热利用系统及沥青混合搅拌设备 - Google Patents

沥青站烘干滚筒烟气余热利用系统及沥青混合搅拌设备 Download PDF

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Publication number
WO2020098589A1
WO2020098589A1 PCT/CN2019/117050 CN2019117050W WO2020098589A1 WO 2020098589 A1 WO2020098589 A1 WO 2020098589A1 CN 2019117050 W CN2019117050 W CN 2019117050W WO 2020098589 A1 WO2020098589 A1 WO 2020098589A1
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WIPO (PCT)
Prior art keywords
pipe
drum
bag
gas
dust collector
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PCT/CN2019/117050
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English (en)
French (fr)
Inventor
程战锋
姜能
赵海建
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三一汽车制造有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN201811368359.9A external-priority patent/CN109224669A/zh
Priority claimed from CN201821895485.5U external-priority patent/CN209123533U/zh
Application filed by 三一汽车制造有限公司 filed Critical 三一汽车制造有限公司
Publication of WO2020098589A1 publication Critical patent/WO2020098589A1/zh

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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
    • 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
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration

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  • the present application relates to the technical field of asphalt mixing equipment, and more particularly, to a system for utilizing residual heat of flue gas in a drying drum of an asphalt station, and an asphalt mixing and stirring device having the system for utilizing residual heat of a flue gas in a drying drum of an asphalt station.
  • Asphalt mixing equipment is the key equipment for asphalt pavement construction. It is mainly used to measure and mix sandstone, asphalt, mineral powder and other materials into asphalt. It is widely used in high-grade highways, cities, airports, docks and other engineering constructions. Asphalt mixing The performance of the mixing equipment directly affects the quality of the asphalt pavement.
  • the cold material system of the asphalt mixing and mixing equipment usually uses a loader to load the various silos, and dust is prone to occur during unloading, causing environmental pollution.
  • Existing asphalt mixing and mixing equipment usually removes the cold material dust through the bag filter, but due to the cold The material dust contains moisture and has a high viscosity, which is very easy to adhere to the surface of the dust removal bag, causing condensation on the bag, clogging the bag, and affecting the use effect of the entire cold material dust removal system.
  • This application aims to solve at least one of the technical problems existing in the prior art.
  • an object of the present application is to provide a waste heat utilization system for the drying drum flue gas of an asphalt station.
  • Another object of the present application is to provide an asphalt mixing and agitating device having the above-mentioned asphalt station drying drum flue gas waste heat utilization system.
  • an embodiment of the first aspect of the present application provides a system for utilizing residual heat of flue gas in a drying drum of an asphalt station, including a bag dust collector, a drying drum and a drum dust collector, the drying drum passes through the drum smoke pipe Communicating with the air inlet of the drum dust collector, and further comprising an air pipe, the first end of the gas pipe is in communication with the bag dust collector, and the second end of the gas pipe is in communication with the drum smoke pipe, or The second end of the air delivery pipe communicates with the drum dust collector; or the gas delivery pipe passes through the drum smoke pipe.
  • the temperature of the flue gas discharged from the drying drum is high.
  • the waste heat of the drum flue gas is recovered to heat the bag of the bag dust collector to prevent the bag from dew condensation, so as to ensure that the bag dust collector can achieve a good dust removal effect, and the heating gas is heated
  • the cloth bag has the advantages of large heat transfer area, high thermal efficiency, energy saving and environmental protection, large processing capacity, simple structure, continuous operation, convenient use, low processing cost, simple disassembly and low maintenance cost.
  • the second end of the gas pipe is in communication with the drum smoke pipe, and a first valve is provided on the gas pipe.
  • the first valve When there is no need to heat the cloth bag, the first valve is closed, so that the air pipe is blocked, and in this state, all the smoke discharged from the drying drum enters the drum dust collector.
  • the first valve When the cloth bag needs to be heated, the first valve is opened to make the air pipe open. In this state, part of the flue gas discharged from the drying drum enters the cloth bag dust collector along the air pipe, and the cloth bag is heated by the roller flue gas.
  • the drum smoke tube is provided with an opening valve, and the second end of the gas pipe is located between the smoke exhaust port of the drying drum and the opening valve.
  • the opening valve When the bag is not heated, the opening valve is fully opened, so that the drum smoke pipe is unobstructed. When the bag is heated, the opening of the opening valve is reduced, which plays a throttling role, thereby promoting part of the flue gas to flow along the gas pipe Bag filter.
  • the second end of the gas delivery pipe communicates with the air outlet of the drum dust collector, and a first valve is provided on the gas delivery pipe.
  • the first valve When there is no need to heat the cloth bag, the first valve is closed, so that the gas pipe is blocked. In this state, all the flue gas purified by the roller dust collector is discharged from the outlet pipe of the roller dust collector. When it is necessary to heat the bag, the first valve is opened to make the gas pipe open. In this state, part of the flue gas purified by the roller dust collector enters the bag dust collector along the gas pipe, and the bag is heated by the purified hot flue gas .
  • the gas pipe passes through the drum smoke pipe, and a first valve is provided on the gas pipe.
  • the gas pipe is passed through the drum smoke pipe, and when there is no need to heat the cloth bag, the first valve is closed, so that the gas pipe is blocked. When the bag needs to be heated, the first valve is opened to enable the gas pipe to pass through. Because the gas pipe passes through the drum smoke pipe, the gas in the gas pipe will exchange heat with the hot flue gas in the drum smoke pipe and be heated by the drum smoke The gas in the gas pipe and the last heated gas enter the bag dust collector along the gas pipe to heat the bag.
  • the position of the gas pipe in the drum smoke pipe is a metal pipe, and the metal pipe has good thermal conductivity, which can improve the heat exchange efficiency of the drum smoke gas and the gas in the gas pipe.
  • the gas pipe is provided with a first valve at a position close to the first end and the second end thereof.
  • the two first valves are closed at the same time, and when it is necessary to heat the cloth bag, the two first valves are opened at the same time.
  • it further includes a dust collecting hood and a dust collecting hood smoke pipe, the air outlet of the dust collecting hood is communicated with the cloth bag dust collector through the dust collecting hood smoke pipe, and the first One end is connected to the dust collecting hood smoke pipe, and communicates with the cloth bag dust collector through the dust collecting hood smoke pipe, the dust collecting hood smoke pipe is provided with a second valve, and the first of the gas pipe The end is located between the second valve and the air inlet of the bag filter.
  • the dust cover is used to collect the dust caused by the loading and unloading of the silo.
  • the second valve is opened to make the smoke pipe of the dust cover conductive, and the dust cover will be brought through the smoke pipe of the dust cover
  • the dusty gas is transported to the bag dust collector.
  • the bag dust collector removes the dust to prevent the cold material dust from polluting the environment.
  • the second valve is closed to ensure that the hot gas in the gas pipe enters the dust hood smoke pipe Afterwards, it will flow into the bag dust collector without flowing back to the dust hood along the smoke pipe of the dust hood.
  • the gas pipe passes through the drum smoke pipe, the second end of the gas pipe is connected to the dust hood smoke pipe, and the second end of the gas pipe is located away from the second valve One side of the cloth bag dust collector; or the gas delivery pipe passes through the drum smoke pipe, and the second end of the gas delivery pipe communicates with the atmosphere.
  • the second end of the air delivery pipe may be connected to the dust collecting hood smoke pipe or directly communicated with the atmosphere.
  • the second valve is opened to make the dust collecting hood smoke tube conduct, and the first valve is closed to block the air conveying pipe.
  • the gas discharged from the dust hood directly enters the bag dust collector through the smoke pipe of the dust hood.
  • the second valve is closed, so that the smoke pipe of the dust collecting hood is blocked, and the first valve is opened, so that the gas transmission pipe is conducted.
  • the gas in the gas pipe will exchange heat with the hot flue gas in the drum smoke pipe, and the gas in the gas pipe is heated by the drum smoke.
  • the heated gas enters the bag dust collector along the air pipe to heat the bag.
  • the second valve is opened to enable the smoke pipe of the dust hood to be turned on, and the first valve is closed to block the gas pipe.
  • the gas discharged from the dust hood enters the bag dust collector through the smoke pipe of the dust hood.
  • the second valve When the cloth bag needs to be heated, the second valve is closed, so that the smoke pipe of the dust hood is blocked, and the first valve is opened to conduct the air pipe.
  • the bag dust collector sucks outside air through the air pipe, because the air pipe is from the drum The smoke pipe passes through, so that the air in the air pipe will exchange heat with the hot flue gas in the drum smoke pipe, and the air in the gas pipe is heated by the drum smoke, and finally the heated air enters the bag dust collector along the gas pipe to heat the bag .
  • the system for utilizing waste heat of the flue gas of the drying drum of the asphalt station further includes a temperature sensor and a controller, and the temperature sensor is installed on the cloth bag dust collector for detecting the cloth bag
  • the temperature of the bag of the dust collector is electrically connected to the temperature sensor and the valves.
  • the temperature sensor is used to detect the bag temperature of the bag dust collector and send the temperature detection signal to the controller.
  • the controller judges that the bag temperature is low and needs heating, the controller controls each valve to open and close accordingly, so that the dust hood smoke tube is
  • the controller judges that the temperature of the bag is high and does not need heating, the controller correspondingly controls the opening and closing of each valve to make the smoke pipe of the dust hood turn on, and the air pipe is blocked. Block, do not send hot air to the bag dust collector, this design makes the function of heating the bag automatically start and stop according to the temperature of the bag.
  • the drying drum flue gas waste heat utilization system of the asphalt station further includes a dust collecting hood, and the second end of the gas pipe passes through the drum flue pipe and is connected to the dust collecting hood The air outlet is connected.
  • the flue gas collected in the dust hood will be heated when passing through the drum smoke pipe, and the heated flue gas will be dusted through the cloth bag It can avoid condensation on the bag and block the bag.
  • the required flue gas temperature can be obtained by adjusting the length of the gas pipe in the drum flue pipe.
  • An embodiment of the second aspect of the present application provides an asphalt mixing and agitating device, including a system for utilizing residual heat of flue gas from the drying drum of an asphalt station as provided in any embodiment of the first aspect of the present application, and the bag filter is connected to the asphalt Cold material system of mixing equipment.
  • the asphalt mixing and stirring equipment provided by the embodiment of the second aspect of the present application has the waste heat utilization system of the flue gas of the drying drum of the asphalt station provided by any embodiment of the first aspect of the present application. Therefore, the asphalt mixing and stirring equipment has the The full beneficial effects of the waste heat utilization system of the flue gas of the drying drum of the asphalt station of the station will not be repeated here.
  • FIG. 1 is a schematic structural diagram of a system for utilizing residual heat of flue gas of a drying drum of an asphalt station according to an embodiment of the present application;
  • FIG. 2 is a schematic diagram of the position of the waste heat utilization system of the drying drum flue gas of the asphalt station in FIG. 1 in the asphalt mixing and agitating equipment;
  • FIG. 3 is a schematic structural diagram of a system for utilizing residual heat of flue gas of a drying drum of an asphalt station according to another embodiment of the present application;
  • FIG. 4 is a schematic structural diagram of a system for utilizing residual heat of flue gas of a drying drum of an asphalt station according to another embodiment of the present application.
  • An embodiment of the first aspect of the present application provides a drying drum flue gas waste heat utilization system of an asphalt station, including a bag dust collector, a drying drum and a drum dust collector, the drying drum is fed through the drum smoke pipe and the drum dust collector
  • the mouth is connected, and also includes a gas pipe, the first end of the gas pipe is connected to the bag dust collector, the second end of the gas pipe is connected to the drum smoke pipe; or the second end of the gas pipe is connected to the drum dust collector, or the gas pipe is made by Pass through the smoke pipe.
  • the temperature of the flue gas discharged from the drying drum is high.
  • the waste heat of the drum flue gas is recovered to heat the bag of the bag dust collector to prevent the bag from dew condensation, so as to ensure that the bag dust collector can achieve a good dust removal effect and heat the gas
  • the cloth bag has the advantages of large heat transfer area, high thermal efficiency, energy saving and environmental protection, large processing capacity, simple structure, continuous operation, convenient use, low processing cost, simple disassembly and low maintenance cost.
  • the waste heat utilization system of the flue gas of the drying drum of the asphalt station includes: bag dust collector 1, drying drum 2, drum dust collector 3, drum smoke pipe 4, dust collecting hood 5, dust collecting hood smoke
  • the smoke exhaust port of the drying drum 2 communicates with the air inlet of the drum dust collector 3 through the drum smoke tube 4
  • the air outlet of the dust collection hood 5 communicates with the bag dust collector 1 through the dust collection hood smoke tube 6
  • the first end of the air pipe 7 communicates with the dust hood smoke pipe 6
  • the second end of the gas pipe 7 communicates with the drum smoke pipe 4
  • the gas pipe 7 is provided with a first valve 8 on the dust hood smoke pipe 6
  • There is a second valve 9, and the first end of the gas pipe 7 is located between the second valve 9 and the air inlet of the bag dust collector 1.
  • the second valve 9 When there is no need to heat the cloth bag, the second valve 9 is opened, so that the dust pipe 6 of the dust hood is turned on, and the first valve 8 is closed, so that the gas pipe 7 is blocked. In this state, all the smoke discharged from the drying drum 2 enters Roller dust collector 3.
  • the second valve 9 When the bag needs to be heated, the second valve 9 is closed, the dust pipe 6 of the dust hood is blocked, the first valve 8 is opened, and the air pipe 7 is turned on. In this state, part of the flue gas discharged from the drying drum 2 Enter the bag dust collector 1 along the air pipe 7 and heat the bag through the drum smoke.
  • the drum smoke pipe 4 is provided with an opening valve 10, and the second end of the air pipe 7 is located between the smoke exhaust port of the drying drum 2 and the opening valve 10.
  • the opening valve 10 is fully opened when there is no need to heat the bag, so that the drum smoke tube 4 is unobstructed.
  • the opening of the opening valve 10 is reduced, which acts as a throttling effect, thereby promoting part of the flue gas
  • the air pipe 7 flows to the bag filter.
  • the waste heat utilization system of the drying drum smoke in the asphalt station includes: bag dust collector 1, drying drum 2, drum dust collector 3, drum smoke pipe 4, dust collecting hood 5, dust collecting hood smoke pipe 6 and Air pipe 7, the smoke outlet of the drying drum 2 communicates with the air inlet of the drum dust collector 3 through the drum smoke pipe 4, and the air outlet of the dust collection hood 5 communicates with the bag dust collector 1 through the dust pipe 6
  • the first end of the air pipe 7 communicates with the dust pipe 6 of the dust hood, and the second end of the gas pipe 7 communicates with the air outlet of the drum dust collector 3.
  • the gas pipe 7 is provided with a first valve 8 There is a second valve 9, and the first end of the gas pipe 7 is located between the second valve 9 and the air inlet of the bag dust collector 1.
  • the second valve 9 When there is no need to heat the bag, the second valve 9 is opened, so that the smoke pipe 6 of the dust hood is turned on, and the first valve 8 is closed, so that the gas pipe 7 is blocked.
  • the flue gas purified by the drum dust collector 3 All flow away from the outlet pipe of the drum dust collector 3.
  • the second valve 9 When the bag needs to be heated, the second valve 9 is closed, the dust pipe 6 of the dust hood is blocked, the first valve 8 is opened, and the gas pipe 7 is turned on.
  • the flue gas purified by the drum dust collector 3 A part enters the bag dust collector 1 along the air delivery pipe 7 and heats the bag by the purified hot flue gas.
  • the waste heat utilization system of the drying drum flue gas in the asphalt station includes: bag dust collector 1, drying drum 2, drum dust collector 3, drum smoke pipe 4, dust collecting hood 5, dust collecting hood smoke pipe 6 and Air pipe 7, the smoke outlet of the drying drum 2 communicates with the air inlet of the drum dust collector 3 through the drum smoke pipe 4, and the air outlet of the dust collection hood 5 communicates with the bag dust collector 1 through the dust pipe 6
  • the air pipe 7 passes through the drum smoke pipe 4, the gas pipe 7 is provided with a first valve 8, the dust pipe 6 is provided with a second valve 9, the two ends of the gas pipe 7 are connected to the dust pipe 6 Moreover, the second end of the gas pipe 7 is located on the side of the second valve 9 away from the bag dust collector 1, that is, the connection positions of the two ends of the gas pipe 7 and the dust collecting hood smoke pipe 6 are located on both sides of the second valve 9, respectively.
  • the gas delivery pipe 7 is passed through the drum smoke pipe 4.
  • the second valve 9 is opened, so that the dust collection hood smoke pipe 6 is turned on, and the first valve 8 is closed, so that the gas delivery pipe 7 is In this state, the gas discharged from the dust collecting hood 5 directly enters the bag dust collector 1 through the smoke pipe 6 of the dust collecting hood.
  • the second valve 9 is closed, so that the smoke pipe 6 of the dust collecting hood is blocked, the first valve 8 is opened, and the gas pipe 7 is turned on. In this state, the gas discharged from the dust collecting hood 5 first enters the dust collection Cover the smoke pipe 6, and then enter the gas pipe 7 along the dust pipe 6 of the dust hood.
  • the gas in the gas pipe 7 will exchange heat with the hot flue gas in the drum smoke pipe 4 ,
  • the gas in the gas pipe 7 is heated by the drum smoke, and finally the heated gas enters the bag dust collector 1 along the gas pipe 7 to heat the bag.
  • the position of the gas pipe 7 in the drum smoke pipe 4 is a metal pipe.
  • the metal pipe has good thermal conductivity, which can improve the heat exchange efficiency of the drum smoke gas and the gas in the gas pipe 7.
  • the gas pipe 7 is provided with a first valve 8 at a position close to the first end and the second end thereof.
  • the two first valves 8 are closed at the same time, and when it is necessary to heat the cloth bag, the two first valves 8 are opened at the same time.
  • the second end of the air pipe may not be connected to the dust hood smoke pipe, but directly communicates with the atmosphere.
  • the second valve is opened to enable the smoke pipe of the dust hood to be turned on, and the first valve is closed to block the gas pipe.
  • the gas discharged from the dust hood enters the bag dust collector through the smoke pipe of the dust hood.
  • the second valve is closed, so that the smoke pipe of the dust hood is blocked, and the first valve is opened to conduct the air pipe.
  • the bag dust collector sucks outside air through the air pipe, because the air pipe is from the drum The smoke pipe passes through, so that the air in the air pipe will exchange heat with the hot flue gas in the drum smoke pipe, and the air in the gas pipe is heated by the drum smoke, and finally the heated air enters the bag dust collector along the gas pipe to heat the bag
  • the system for utilizing waste heat of the flue gas of the drying drum of the asphalt station further includes a temperature sensor and a controller.
  • the temperature sensor is installed on the bag dust collector to detect the bag temperature of the bag dust collector.
  • the controller It is electrically connected to temperature sensors and valves.
  • the temperature sensor is used to detect the bag temperature of the bag dust collector and send the temperature detection signal to the controller.
  • the controller judges that the bag temperature is low and needs heating, the controller controls each valve to open and close accordingly, so that the dust hood smoke tube is
  • the controller judges that the temperature of the bag is high and does not need heating, the controller correspondingly controls the opening and closing of each valve, so that the smoke pipe of the dust hood is turned on, and the air pipe is blocked. Block, do not send hot air to the bag dust collector, this design makes the function of heating the bag automatically start and stop according to the temperature of the bag.
  • the difference between this embodiment and Embodiment 3 is that there is no need to provide a separate dust collecting hood smoke pipe 6.
  • the asphalt station drying drum flue gas waste heat utilization system further includes a dust collecting hood 5 through which the second end of the gas pipe 7 passes The drum smoke tube 4 communicates with the air outlet of the dust collecting hood 5 afterwards.
  • the flue gas collected in the dust hood will be heated when passing through the drum smoke pipe, and the heated flue gas will be dusted through the cloth bag It can avoid condensation on the bag and block the bag.
  • the required flue gas temperature can be obtained by adjusting the length of the gas pipe in the drum flue pipe.
  • An embodiment of the second aspect of the present application provides an asphalt mixing and agitating equipment, which includes a system for utilizing residual heat of flue gas from the drying drum of an asphalt station as provided in any embodiment of the first aspect of the present application, and a bag filter 1 is connected to the asphalt mixing and agitating equipment Cold material system.
  • the asphalt mixing and stirring equipment provided by the embodiment of the second aspect of the present application has the waste heat utilization system of the flue gas of the drying drum of the asphalt station provided by any embodiment of the first aspect of the present application. Therefore, the asphalt mixing and stirring equipment is provided by any of the above embodiments The full beneficial effects of the waste heat utilization system of the flue gas of the drying drum of the asphalt station of the station will not be repeated here.
  • connection may be a fixed connection, a detachable connection, or an integral connection; it may be Directly connected, or indirectly through intermediate media.

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Abstract

一种沥青站烘干滚筒烟气余热利用系统及沥青混合搅拌设备，该余热利用系统包括布袋除尘器（1）、烘干滚筒（2）和滚筒除尘器（3），烘干滚筒（2）通过滚筒烟管（4）与滚筒除尘器（3）的进气口连通，还包括输气管（7），输气管（7）的第一端与布袋除尘器（1）连通，输气管（7）的第二端与滚筒烟管（4）连通，或输气管（7）的第二端与滚筒除尘器（3）连通；或输气管（7）由滚筒烟管（4）内穿过。烘干滚筒（2）排出的烟气温度高，通过回收利用滚筒烟气的余热，为布袋除尘器（1）的布袋加热，防止布袋结露，从而保证布袋除尘器（1）达到良好的除尘效果，通过热气体加热布袋具有传热面积大、热效率高、节能环保、处理能力大、结构简单、连续操作、使用方便、加工成本低、拆卸简单、维护成本低的优点。

Description

沥青站烘干滚筒烟气余热利用系统及沥青混合搅拌设备
本申请要求于2018年11月16日提交中国专利局、申请号为“2018113683599”、发明名称为“沥青站烘干滚筒烟气余热利用系统及沥青混合搅拌设备”的中国专利申请以及申请号为“2018218954855”、发明名称为“沥青站烘干滚筒烟气余热利用系统及沥青混合搅拌设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及沥青搅拌设备技术领域，更具体而言，涉及一种沥青站烘干滚筒烟气余热利用系统，以及一种具有上述沥青站烘干滚筒烟气余热利用系统的沥青混合搅拌设备。
背景技术
沥青混合搅拌设备是沥青路面施工的关键设备，主要用于将砂石料、沥青、矿粉等材料计量并搅拌成沥青，被广泛应用于高等级公路、城市、机场、码头等工程施工，沥青混合搅拌设备的设备性能好坏直接影响沥青路面的质量。
沥青混合搅拌设备的冷料系统通常采用装载机向各料仓上料，卸料时易出现扬尘现象，造成环境污染，现有沥青混合搅拌设备通常通过布袋除尘器除去冷料粉尘，但因冷料粉尘含有水分，粘性较大，极易粘附在除尘布袋表面，致使布袋结露，堵塞布袋，影响整个冷料除尘系统的使用效果。
发明内容
本申请旨在解决现有技术中存在的技术问题至少之一。
为此，本申请的一个目的在于，提供一种沥青站烘干滚筒烟气余热利用系统。
本申请的另一个目的在于，提供一种具有上述沥青站烘干滚筒烟气余热利用系统的沥青混合搅拌设备。
为实现上述目的，本申请第一方面的实施例提供了一种沥青站烘干滚筒烟气余热利用系统，包括布袋除尘器、烘干滚筒和滚筒除尘器，所述烘干滚筒通过滚筒烟管与所述滚筒除尘器的进气口连通，还包括输气管，所述输气管的第一端与所述布袋除尘器连通，所述输气管的第二端与所述滚筒烟管连通，或所述输气管的第二端与所述滚筒除尘器连通；或所述输气管由所述滚筒烟管内穿过。
烘干滚筒排出的烟气温度高，本方案通过回收利用滚筒烟气的余热，为布袋除尘器的布袋加热，防止布袋结露，从而保证布袋除尘器可达到良好的除尘效果，通热气体加热布袋具有传热面积大、热效率高、节能环保、处理能力大、结构简单、连续操作、使用方便、加工成本低、拆卸简单、维护成本低等优点。
在本申请的一个实施例中，所述输气管的第二端与所述滚筒烟管连通，所述输气管上设有第一阀门。
在不需要加热布袋时，第一阀门关闭，使输气管被阻断，此状态下烘干滚筒排出的烟气全部进入滚筒除尘器。在需要加热布袋时，第一阀门打开，使输气管导通，此状态下烘干滚筒排出的烟气中的一部分沿输气管进入布袋除尘器，通过滚筒烟气为布袋加热。
在上述实施例中，优选地，所述滚筒烟管上设有开度阀，且所述输气管的第二端位于所述烘干滚筒的排烟口和所述开度阀之间。
在不需要加热布袋时，开度阀完全打开，使滚筒烟管畅通无阻，在需要加热布袋时，开度阀的开度减小，起到节流作用，从而促使部分烟气沿输气管流向布袋除尘器。
在本申请的另一个实施例中，所述输气管的第二端与所述滚筒除尘器的出气口连通，所述输气管上设有第一阀门。
在不需要加热布袋时，第一阀门关闭，使输气管被阻断，此状态下由滚筒除尘器净化后的烟气全部由滚筒除尘器出口管道流走。在需要加热布袋时，第一阀门打开，使输气管导通，此状态下由滚筒除尘器净化后的烟气中的一部分沿输气管进入布袋除尘器，通过净化后的热烟气为布袋加热。
在本申请的另一个实施例中，所述输气管由所述滚筒烟管内穿过，所 述输气管上设有第一阀门。
本方案中，输气管由滚筒烟管内穿过，在不需要加热布袋时，第一阀门关闭，使输气管被阻断。在需要加热布袋时，第一阀门打开，使输气管导通，由于输气管从滚筒烟管内穿过，使得输气管内的气体会与滚筒烟管内热烟气进行热交换，通过滚筒烟气加热输气管内的气体，最后被加热的气体沿输气管进入布袋除尘器，为布袋加热。
其中优选地，输气管位于滚筒烟管内的部位为金属管，金属管导热性好，可提升滚筒烟气与输气管内气体的换热效率。
在上述实施例中，可选地，所述输气管在靠近其第一端和第二端的位置各设一个第一阀门。
在不需要加热布袋时，两个第一阀门同时关闭，在需要加热布袋时，两个第一阀门同时打开。
在上述任一实施例中，还包括集尘罩和集尘罩烟管，所述集尘罩的出气口通过所述集尘罩烟管与所述布袋除尘器连通，所述输气管的第一端连接所述集尘罩烟管，并通过所述集尘罩烟管与所述布袋除尘器连通，所述集尘罩烟管上设有第二阀门，且所述输气管的第一端位于所述第二阀门和所述布袋除尘器的进气口之间。
集尘罩用于收集料仓上料、卸料时造成的扬尘，在不需要加热布袋时，第二阀门打开，使集尘罩烟管导通，集尘罩通过集尘罩烟管将带有粉尘的气体输送到布袋除尘器内，布袋除尘器将粉尘去除，以防止冷料粉尘污染环境，在需要加热布袋时，第二阀门关闭，以保证输气管内的热气进入集尘罩烟管后会流入布袋除尘器，而不会沿集尘罩烟管向集尘罩倒流。
可选地，所述输气管由所述滚筒烟管内穿过，所述输气管的第二端连接所述集尘罩烟管，且所述输气管的第二端位于所述第二阀门远离所述布袋除尘器的一侧；或者所述输气管由所述滚筒烟管内穿过，所述输气管的第二端与大气连通。
在输气管由滚筒烟管内穿过的技术方案中，输气管的第二端可以连接集尘罩烟管也可以直接与大气连通。输气管的第二端连接集尘罩烟管的情况下，在不需要加热布袋时，第二阀门打开，使集尘罩烟管导通，第一阀 门关闭，使输气管被阻断，此状态下集尘罩排出的气体直接由集尘罩烟管进入布袋除尘器。在需要加热布袋时，第二阀门关闭，使集尘罩烟管被阻断，第一阀门打开，使输气管导通，此状态下集尘罩排出的气体先进入集尘罩烟管，然后沿集尘罩烟管进入输气管，由于输气管从滚筒烟管内穿过，使得输气管内的气体会与滚筒烟管内热烟气进行热交换，通过滚筒烟气加热输气管内的气体，最后被加热的气体沿输气管进入布袋除尘器，为布袋加热。输气管的第二端与大气连通的情况下，在不需要加热布袋时，第二阀门打开，使集尘罩烟管导通，第一阀门关闭，使输气管被阻断，此状态下集尘罩排出的气体由集尘罩烟管进入布袋除尘器。在需要加热布袋时，第二阀门关闭，使集尘罩烟管被阻断，第一阀门打开，使输气管导通，此状态下布袋除尘器通过输气管吸入外界空气，由于输气管从滚筒烟管内穿过，使得输气管内的空气会与滚筒烟管内热烟气进行热交换，通过滚筒烟气加热输气管内的空气，最后被加热的空气沿输气管进入布袋除尘器，为布袋加热。
在上述任一实施例中，优选地，所述沥青站烘干滚筒烟气余热利用系统还包括温度传感器和控制器，所述温度传感器安装在所述布袋除尘器上，用于检测所述布袋除尘器的布袋温度，所述控制器与所述温度传感器以及各阀门电连接。
温度传感器用于检测布袋除尘器的布袋温度，并将温度检测信号发送给控制器，当控制器判断布袋温度较低需要加热时，控制器相应控制各阀门开闭，使集尘罩烟管被阻断，输气管导通，从而向布袋除尘器输送热气，当控制器判断布袋温度较高不需要加热时，控制器相应控制各阀门开闭，使集尘罩烟管导通，输气管被阻断，不向布袋除尘器输送热气，这样设计使得加热布袋的功能可根据布袋温度自动启动和停止。
在本申请的另一个实施例中，该沥青站烘干滚筒烟气余热利用系统还包括集尘罩，所述输气管的第二端穿过所述滚筒烟管后与所述集尘罩的出气口连通。
由于输气管的第二端穿过滚筒烟管后与集尘罩的出气口连通，因此，集尘罩中收集的烟气在经过滚筒烟管时会被加热，加热后的烟气经过布袋 除尘器，可以避免布袋结露，堵塞布袋。当然，可以通过调整输气管在滚筒烟管内的长度，获得所需的烟气温度。
本申请第二方面的实施例提供了一种沥青混合搅拌设备，包括如本申请第一方面任一实施例提供的沥青站烘干滚筒烟气余热利用系统，所述布袋除尘器连接所述沥青混合搅拌设备的冷料系统。
本申请第二方面实施例提供的沥青混合搅拌设备，具有本申请第一方面任一实施例提供的沥青站烘干滚筒烟气余热利用系统，因此该沥青混合搅拌设备具有上述任一实施例提供的沥青站烘干滚筒烟气余热利用系统的全部有益效果，在此不再赘述。
本申请的附加方面和优点将在下面的描述部分中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是本申请的一个实施例提供的沥青站烘干滚筒烟气余热利用系统的结构示意图；
图2是图1中所述沥青站烘干滚筒烟气余热利用系统位于沥青混合搅拌设备中的位置示意图；
图3是本申请的另一个实施例提供的沥青站烘干滚筒烟气余热利用系统的结构示意图；
图4是本申请的另一个实施例提供的沥青站烘干滚筒烟气余热利用系统的结构示意图。
其中，图1至图4中的附图标记与部件名称之间的对应关系为：
1布袋除尘器，2烘干滚筒，3滚筒除尘器，4滚筒烟管，5集尘罩，6集尘罩烟管，7输气管，8第一阀门，9第二阀门，10开度阀。
具体实施方式
为了能够更清楚地理解本申请的上述目的、特征和优点，下面结合附 图和具体实施方式对本申请进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本申请，但是，本申请还可以采用其他不同于在此描述的方式来实施，因此，本申请的保护范围并不受下面公开的具体实施例的限制。
本申请第一方面的实施例提供了一种沥青站烘干滚筒烟气余热利用系统，包括布袋除尘器、烘干滚筒和滚筒除尘器，烘干滚筒通过滚筒烟管与滚筒除尘器的进气口连通，还包括输气管，输气管的第一端与布袋除尘器连通，输气管的第二端与滚筒烟管连通；或输气管的第二端与滚筒除尘器连通，或输气管由滚筒烟管内穿过。
烘干滚筒排出的烟气温度高，本方案通过回收利用滚筒烟气的余热，为布袋除尘器的布袋加热，防止布袋结露，从而保证布袋除尘器可达到良好的除尘效果，通热气体加热布袋具有传热面积大、热效率高、节能环保、处理能力大、结构简单、连续操作、使用方便、加工成本低、拆卸简单、维护成本低等优点。
实施例1：
如图1和图2所示，沥青站烘干滚筒烟气余热利用系统包括：布袋除尘器1、烘干滚筒2、滚筒除尘器3、滚筒烟管4、集尘罩5、集尘罩烟管6和输气管7，烘干滚筒2的排烟口通过滚筒烟管4与滚筒除尘器3的进气口连通，集尘罩5的出气口通过集尘罩烟管6与布袋除尘器1连通，输气管7的第一端与集尘罩烟管6连通，输气管7的第二端与滚筒烟管4连通，输气管7上设有第一阀门8集尘罩烟管6上设有第二阀门9，且输气管7的第一端位于第二阀门9和布袋除尘器1的进气口之间。
在不需要加热布袋时，第二阀门9打开，使集尘罩烟管6导通，第一阀门8关闭，使输气管7被阻断，此状态下烘干滚筒2排出的烟气全部进入滚筒除尘器3。在需要加热布袋时，第二阀门9关闭，使集尘罩烟管6被阻断，第一阀门8打开，使输气管7导通，此状态下烘干滚筒2排出的烟气中的一部分沿输气管7进入布袋除尘器1，通过滚筒烟气为布袋加热。
在上述实施例中，优选地，滚筒烟管4上设有开度阀10，且输气管7 的第二端位于烘干滚筒2的排烟口和开度阀10之间。
在不需要加热布袋时，开度阀10完全打开，使滚筒烟管4畅通无阻，在需要加热布袋时，开度阀10的开度减小，起到节流作用，从而促使部分烟气沿输气管7流向布袋除尘器。
实施例2：
如图3所示，沥青站烘干滚筒烟气余热利用系统包括：布袋除尘器1、烘干滚筒2、滚筒除尘器3、滚筒烟管4、集尘罩5、集尘罩烟管6和输气管7，烘干滚筒2的排烟口通过滚筒烟管4与滚筒除尘器3的进气口连通，集尘罩5的出气口通过集尘罩烟管6与布袋除尘器1连通，输气管7的第一端与集尘罩烟管6连通，输气管7的第二端与滚筒除尘器3的出气口连通，输气管7上设有第一阀门8集尘罩烟管6上设有第二阀门9，且输气管7的第一端位于第二阀门9和布袋除尘器1的进气口之间。
在不需要加热布袋时，第二阀门9打开，使集尘罩烟管6导通，第一阀门8关闭，使输气管7被阻断，此状态下由滚筒除尘器3净化后的烟气全部由滚筒除尘器3出口管道流走。在需要加热布袋时，第二阀门9关闭，使集尘罩烟管6被阻断，第一阀门8打开，使输气管7导通，此状态下由滚筒除尘器3净化后的烟气中的一部分沿输气管7进入布袋除尘器1，通过净化后的热烟气为布袋加热。
实施例3：
如图4所示，沥青站烘干滚筒烟气余热利用系统包括：布袋除尘器1、烘干滚筒2、滚筒除尘器3、滚筒烟管4、集尘罩5、集尘罩烟管6和输气管7，烘干滚筒2的排烟口通过滚筒烟管4与滚筒除尘器3的进气口连通，集尘罩5的出气口通过集尘罩烟管6与布袋除尘器1连通，输气管7由滚筒烟管4内穿过，输气管7上设有第一阀门8，集尘罩烟管6上设有第二阀门9，输气管7的两端与集尘罩烟管6连接且输气管7的第二端位于第二阀门9远离布袋除尘器1的一侧，即输气管7的两端与集尘罩烟管6连接位置分别位于第二阀门9的两侧。
本方案中，输气管7由滚筒烟管4内穿过，在不需要加热布袋时，第二阀门9打开，使集尘罩烟管6导通，第一阀门8关闭，使输气管7被阻 断，此状态下集尘罩5排出的气体直接由集尘罩烟管6进入布袋除尘器1。在需要加热布袋时，第二阀门9关闭，使集尘罩烟管6被阻断，第一阀门8打开，使输气管7导通，此状态下集尘罩5排出的气体先进入集尘罩烟管6，然后沿集尘罩烟管6进入输气管7，由于输气管7从滚筒烟管4内穿过，使得输气管7内的气体会与滚筒烟管4内热烟气进行热交换，通过滚筒烟气加热输气管7内的气体，最后被加热的气体沿输气管7进入布袋除尘器1，为布袋加热。
其中优选地，输气管7位于滚筒烟管4内的部位为金属管，金属管导热性好，可提升滚筒烟气与输气管7内气体的换热效率。
在上述实施例中，可选地，输气管7在靠近其第一端和第二端的位置各设置一个第一阀门8。
在不需要加热布袋时，两个第一阀门8同时关闭，在需要加热布袋时，两个第一阀门8同时打开。
本实施例中，输气管的第二端可以不连接集尘罩烟管，而是直接与大气连通。输气管的第二端与大气连通的情况下，在不需要加热布袋时，第二阀门打开，使集尘罩烟管导通，第一阀门关闭，使输气管被阻断，此状态下集尘罩排出的气体由集尘罩烟管进入布袋除尘器。在需要加热布袋时，第二阀门关闭，使集尘罩烟管被阻断，第一阀门打开，使输气管导通，此状态下布袋除尘器通过输气管吸入外界空气，由于输气管从滚筒烟管内穿过，使得输气管内的空气会与滚筒烟管内热烟气进行热交换，通过滚筒烟气加热输气管内的空气，最后被加热的空气沿输气管进入布袋除尘器，为布袋加热
在上述任一实施例中，优选地，沥青站烘干滚筒烟气余热利用系统还包括温度传感器和控制器，温度传感器安装在布袋除尘器上，用于检测布袋除尘器的布袋温度，控制器与温度传感器以及各阀门电连接。
温度传感器用于检测布袋除尘器的布袋温度，并将温度检测信号发送给控制器，当控制器判断布袋温度较低需要加热时，控制器相应控制各阀门开闭，使集尘罩烟管被阻断，输气管导通，从而向布袋除尘器输送热气，当控制器判断布袋温度较高不需要加热时，控制器相应控制各阀门开闭， 使集尘罩烟管导通，输气管被阻断，不向布袋除尘器输送热气，这样设计使得加热布袋的功能可根据布袋温度自动启动和停止。
实施例4：
该实施例与实施例3不同的是，不需要设置独立的集尘罩烟管6，该沥青站烘干滚筒烟气余热利用系统还包括集尘罩5，输气管7的第二端穿过所述滚筒烟管4后与所述集尘罩5的出气口连通。
由于输气管的第二端穿过滚筒烟管后与集尘罩的出气口连通，因此，集尘罩中收集的烟气在经过滚筒烟管时会被加热，加热后的烟气经过布袋除尘器，可以避免布袋结露，堵塞布袋。当然，可以通过调整输气管在滚筒烟管内的长度，获得所需的烟气温度。
本申请第二方面的实施例提供了一种沥青混合搅拌设备，包括如本申请第一方面任一实施例提供的沥青站烘干滚筒烟气余热利用系统，布袋除尘器1连接沥青混合搅拌设备的冷料系统。
本申请第二方面实施例提供的沥青混合搅拌设备，具有本申请第一方面任一实施例提供的沥青站烘干滚筒烟气余热利用系统，因此该沥青混合搅拌设备具有上述任一实施例提供的沥青站烘干滚筒烟气余热利用系统的全部有益效果，在此不再赘述。
在本申请的描述中，术语“连接”、“安装”、“固定”等均应做广义理解，例如，“连接”可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本说明书的描述中，术语“一个实施例”、“一些实施例”、“具体实施例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或实例。而且，描述的具体特征、结构、材料或特点可以在任何的一个或多个实施例或示例中以合适的方式结合。术语“第一”、“第二”、“第三”等仅用于描述的目的，而不能理解为指示或暗示相对重要性，除非另有明确的规定和限定。对于本领域 的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种沥青站烘干滚筒烟气余热利用系统，包括布袋除尘器(1)、烘干滚筒(2)和滚筒除尘器(3)，所述烘干滚筒(2)通过滚筒烟管(4)与所述滚筒除尘器(3)的进气口连通，其中，
    还包括输气管(7)，所述输气管(7)的第一端与所述布袋除尘器(1)连通，所述输气管(7)的第二端与所述滚筒烟管(4)连通，或所述输气管(7)的第二端与所述滚筒除尘器(3)连通；或所述输气管(7)由所述滚筒烟管(4)内穿过。
  2. 根据权利要求1所述的沥青站烘干滚筒烟气余热利用系统，其中，
    所述输气管(7)的第二端与所述滚筒烟管(4)连通，所述输气管(7)上设有第一阀门(8)。
  3. 根据权利要求2所述的沥青站烘干滚筒烟气余热利用系统，其中，
    所述滚筒烟管(4)上设有开度阀(10)，且所述输气管(7)的第二端位于所述烘干滚筒(2)的排烟口和所述开度阀(10)之间。
  4. 根据权利要求1所述的沥青站烘干滚筒烟气余热利用系统，其中，
    所述输气管(7)的第二端与所述滚筒除尘器(3)的出气口连通，所述输气管(7)上设有第一阀门(8)。
  5. 根据权利要求1所述的沥青站烘干滚筒烟气余热利用系统，其中，
    所述输气管(7)由所述滚筒烟管(4)内穿过，所述输气管(7)上设有第一阀门(8)。
  6. 根据权利要求2至5中任一项所述的沥青站烘干滚筒烟气余热利用系统，其中，
    还包括集尘罩(5)和集尘罩烟管(6)，所述集尘罩(5)的出气口通过所述集尘罩烟管(6)与所述布袋除尘器(1)连通，所述输气管(7)的第一端连接所述集尘罩烟管，并通过所述集尘罩烟管与所述布袋除尘器(1)连通，所述集尘罩烟管(6)上设有第二阀门(9)，且所述输气管(7)的第一端位于所述第二阀门(9)和所述布袋除尘器(1)的进气口之间。
  7. 根据权利要求6所述的沥青站烘干滚筒烟气余热利用系统，其中，
    所述输气管(7)由所述滚筒烟管(4)内穿过，所述输气管(7)的第二端连接所述集尘罩烟管(6)，且所述输气管(7)的第二端位于所述第二阀门(9)远离所述布袋除尘器(1)的一侧；
    或者所述输气管(7)由所述滚筒烟管(4)内穿过，所述输气管(7)的第二端与大气连通。
  8. 根据权利要求6所述的沥青站烘干滚筒烟气余热利用系统，其中，
    还包括温度传感器和控制器，所述温度传感器安装在所述布袋除尘器(1)上，用于检测所述布袋除尘器(1)的布袋温度，所述控制器与所述温度传感器以及各阀门电连接。
  9. 根据权利要求1所述的沥青站烘干滚筒烟气余热利用系统，其中，
    还包括集尘罩(5)，所述输气管(7)的第二端穿过所述滚筒烟管(4)后与所述集尘罩(5)的出气口连通。
  10. 一种沥青混合搅拌设备，其中，包括如权利要求1至9中任一项所述的沥青站烘干滚筒烟气余热利用系统，所述布袋除尘器(1)连接所述沥青混合搅拌设备的冷料系统。
PCT/CN2019/117050 2018-11-16 2019-11-11 沥青站烘干滚筒烟气余热利用系统及沥青混合搅拌设备 WO2020098589A1 (zh)

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CN1605401A (zh) * 2003-10-10 2005-04-13 中国科学院过程工程研究所 沥青混凝土装车时的烟气净化处理和余热回收方法及装置
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