An asphalt mixture countercurrent heat regeneration tail gas treatment device and treatment method

Abstract

The present application provides a kind of asphalt mixture countercurrent heat regeneration tail gas processing device and processing method, including gravity settling chamber connected with regeneration drying roller;Dust collector, dust collector is connected with gravity settling chamber;Air draught fan, air draught fan is connected with dust collector;Heat exchanger, heat exchanger has first input, second input, first output connected with first input and second output connected with second input, first input is connected with air draught fan;Incinerator, incinerator is connected with first output by first air door, incinerator is connected with second input by second air door;Heat conducting oil supply equipment, heat conducting oil supply equipment is connected with incinerator by third air door, heat conducting oil supply equipment is also connected with second output by fourth air door;First chimney, first chimney is connected with second output by fifth air door.The present application has the advantages that: it can realize effective purification to countercurrent heat regeneration tail gas, meet environmental protection requirement, reduce operating cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of asphalt mixture hot recycling equipment, and particularly relates to an asphalt mixture countercurrent hot recycling tail gas treatment device and a treatment method. BACKGROUND

[0002] The asphalt mixture hot recycling equipment is a device for producing excellent asphalt mixture by using recycling technology to mill the old asphalt mixture on the asphalt pavement, screening, heating, storing and metering the old asphalt mixture, and adding the old asphalt mixture into a mixing cylinder of an asphalt mixing device according to different proportions to uniformly mix the old asphalt mixture with raw materials in the mixing cylinder. The hot recycling plant in the plant can be divided into two types, i.e., a countercurrent heating type and a countercurrent heating type, according to the heating mode. The treatment methods of the recycling tail gas generated by the two types are also different. The recycling tail gas generated by the countercurrent heating type has a high temperature, and a common method is to introduce the recycling tail gas into the inside of a raw drying cylinder for secondary incineration treatment, and the tail gas generated by the raw drying cylinder is filtered by a raw bag dust collector.

[0003] The recycling tail gas generated by the countercurrent heating type has a low temperature and contains a large amount of dust. If the recycling tail gas is introduced into the inside of the raw drying cylinder for secondary incineration, the temperature of the raw material will be affected, and the dust will cause great wear of the induced draft fan. A large amount of dust is easy to block the pipeline. Therefore, a common method is to separately introduce the countercurrent recycling tail gas into a bag dust collector for filtering treatment. The recycling tail gas needs to be treated by a powder wrapping smoke treatment before entering the bag dust collector, that is, the recycled powder or mineral powder is sprayed into the smoke pipe by a powder spraying device to mix the powder with the recycling tail gas, adsorb the asphalt smoke in the recycling tail gas, and then pass through the bag dust collector for filtering treatment, so as to prevent the asphalt smoke in the recycling tail gas from directly contacting the bag and polluting the bag. However, in the actual production process, the temperature of the countercurrent recycling tail gas is low (usually <100℃), the water content is high, and the viscosity of the asphalt smoke in the tail gas is large. The dust adsorbing the asphalt smoke and water vapor will cause the bag to appear a "bag sticking" phenomenon when passing through the bag of the bag dust collector, which reduces the service life of the bag. On the other hand, due to the limited dust adsorption capacity, the method of using powder wrapping smoke and bag dust collector has a low purification efficiency for harmful gases in the recycling tail gas.

[0004] At present, the most thorough purification method for harmful gases in the recycling tail gas is incineration. The flue gas is heated to more than 800℃ by the incinerator, so that most of the pollutants in the flue gas are cracked into carbon dioxide and water, thereby achieving the purpose of flue gas purification. However, the incineration method needs to heat the flue gas to more than 800℃, which needs to consume a large amount of fuel and has a high cost of independent operation of the system. Meanwhile, the flue gas emission temperature is too high, which does not meet the green environmental protection requirements. In view of the above problems, the present application is produced after the present inventor has made a deep research on the problem. SUMMARY

[0005] In view of the above-mentioned problems, the purpose of the present application is to provide an asphalt mixture countercurrent heat regeneration tail gas treatment device and method, which can effectively purify the countercurrent heat regeneration tail gas, meet the environmental protection requirements, and reduce the operation cost.

[0006] The present application is implemented as follows:

[0007] In a first aspect, an asphalt mixture countercurrent heat regeneration tail gas treatment device comprises:

[0008] A gravity settling chamber, an input end of the gravity settling chamber being connected with a feeding end of a regeneration drying roller;

[0009] A dust collector, an input end of the dust collector being connected with an output end of the gravity settling chamber;

[0010] An induced draft fan, an input end of the induced draft fan being connected with an output end of the dust collector;

[0011] A heat exchanger, the heat exchanger having a first input port, a second input port, a first output port connected with the first input port, and a second output port connected with the second input port, the first input port being connected with an output end of the induced draft fan;

[0012] An incinerator, an input end of the incinerator being connected with the first output port through a first damper, an output end of the incinerator being connected with the second input port through a second damper, the incinerator being provided with a burner;

[0013] A heat conducting oil supply device, an input end of the heat conducting oil supply device being connected with the incinerator through a third damper, the input end of the heat conducting oil supply device also being connected with the second output port through a fourth damper;

[0014] A first chimney, the first chimney being connected with the second output port through a fifth damper.

[0015] Further, the first input port is provided with a first temperature detector, the first output port is provided with a second temperature detector, the output end of the incinerator is provided with a third temperature detector, and the second output port is provided with a fourth temperature detector.

[0016] Further, the heat conducting oil supply device comprises:

[0017] A heat conducting oil furnace, a hot air input end of the heat conducting oil furnace being connected with the output end of the incinerator through the third damper and being connected with the second output port through the fourth damper, the heat conducting oil furnace being provided with a heat conducting oil delivery pipeline;

[0018] A second chimney, the second chimney being connected with a hot air output end of the heat conducting oil furnace.

[0019] a circulating pump arranged on the heat conducting oil conveying pipeline;

[0020] a heat conducting oil storage tank arranged on the heat conducting oil conveying pipeline, and provided with a fifth temperature detector.

[0021] Further, the second output port is connected with a chimney transition joint, the chimney transition joint has a first shunt outlet and a second shunt outlet, the first shunt outlet is connected with a first chimney through a fifth damper, the second shunt outlet is connected with an input end of the heat conducting oil supply device through a first air duct, and the fourth damper is arranged on the first air duct.

[0022] Further, a top of the gravity settling chamber is connected with an input end of a dust collector through a second air duct, a bottom of the gravity settling chamber is provided with a weight switch, and the weight switch is connected with a regenerated material elevator through a chute.

[0023] Further, the dust collector is a cyclone dust collector, a top of the dust collector is connected with an input end of an induced draft fan through a third air duct, and a bottom of the dust collector is connected with a powder elevator through a screw conveyor; and an output end of the induced draft fan is connected with the first input port through a fourth air duct.

[0024] Further, the first damper, the second damper, the third damper and the fourth damper are all pneumatic dampers, the fifth damper is an electrically adjusted damper; and the first damper, the second damper, the third damper, the fourth damper, the heat exchanger, the incinerator and the heat conducting oil supply device are all wrapped with heat insulation cotton.

[0025] In a second aspect, a processing method of the asphalt mixture countercurrent heat regeneration tail gas treatment device is provided, and the processing method comprises the following steps:

[0026] When the asphalt mixture is produced by using the regeneration drying roller, the first damper, the second damper and the fourth damper are controlled to be in an open state, and the third damper is controlled to be in a closed state;

[0027] The induced draft fan is controlled to work, the countercurrent heat regeneration tail gas output by the regeneration drying roller is sent into the gravity settling chamber to be subjected to gravity settling and filtration, the coarse dust particles generated in the filtration are transported to the regenerated material elevator, the countercurrent heat regeneration tail gas subjected to the gravity settling and filtration is continuously transported to the dust collector to be subjected to dust removal and filtration, and the fine dust particles generated in the filtration are transported to the powder elevator.

[0028] The burner of the incinerator is controlled to work, the filtered countercurrent heat regeneration tail gas is input into the heat exchanger through the first input port, and then is transported into the incinerator through the first output port to be incinerated and purified; the incinerated and purified countercurrent heat regeneration tail gas is sent into the heat exchanger through the second input port to exchange heat, so as to preheat the countercurrent heat regeneration tail gas input through the first input port;

[0029] Part of the output countercurrent heat regeneration tail gas after heat exchange is discharged through the first chimney, and the other part of the countercurrent heat regeneration tail gas is transported to the heat conducting oil supply device to heat the heat conducting oil of the heat conducting oil supply device by the countercurrent heat regeneration tail gas.

[0030] Further, the processing method further comprises the following steps:

[0031] When the countercurrent heat regeneration tail gas does not need to be processed, the first air door, the second air door and the fourth air door are controlled to be in a closed state, and the third air door is controlled to be in an open state;

[0032] The burner of the incinerator is controlled to work, the hot gas generated by the working burner is transported to the heat conducting oil supply device to heat the heat conducting oil of the heat conducting oil supply device by the hot gas; at the same time, the temperature of the heat conducting oil in the heat conducting oil supply device is detected, and the fire power of the burner is adjusted according to the temperature of the heat conducting oil to control the temperature of the heat conducting oil to be between 180℃ and 200℃.

[0033] Further, when the burner of the incinerator is controlled to work, the temperature in the furnace of the incinerator is detected, and the fire power of the burner is adjusted according to the temperature in the furnace to control the temperature in the furnace of the incinerator to be between 800℃ and 850℃;

[0034] When the other part of the countercurrent heat regeneration tail gas is transported to the heat conducting oil supply device, the temperature of the heat conducting oil in the heat conducting oil supply device is detected, when the temperature of the heat conducting oil is less than a set temperature range, the fifth air door is controlled to be small to increase the countercurrent heat regeneration tail gas entering the heat conducting oil supply device; when the temperature of the heat conducting oil is greater than the set temperature range, the fifth air door is controlled to be large to reduce the countercurrent heat regeneration tail gas entering the heat conducting oil supply device.

[0035] By adopting the technical scheme of the present application, at least the following beneficial effects are achieved:

[0036] 1. The counter-current thermal regeneration exhaust gas generated by the regeneration drying drum is incinerated in an incinerator, which can thoroughly purify the harmful substances in the exhaust gas, thus ensuring that the discharged exhaust gas meets environmental protection requirements. Furthermore, the purified exhaust gas enters a heat exchanger to exchange heat with the unburned exhaust gas, preheating it and effectively reducing burner fuel consumption, achieving energy savings. The exhaust gas temperature also meets environmental protection requirements. Simultaneously, a portion of the heat-exchanged exhaust gas is introduced into the heat transfer oil supply equipment, directly heating the heat transfer oil without requiring an additional heat source, further enhancing energy efficiency and significantly reducing production costs.

[0037] 2. A gravity settling chamber and a dust collector are installed at the output end of the regeneration drying drum. The combination of the gravity settling chamber and the dust collector can reliably filter out most of the dust in the counter-current thermal regeneration exhaust gas, thereby reducing the adverse effects of dust on subsequent induced draft fans, heat exchangers, etc., and improving the service life of induced draft fans, heat exchangers, etc.

[0038] 3. When using the recycling drying drum for asphalt mixture production, it can effectively purify the generated counter-current hot recycling exhaust gas and heat the heat transfer oil in the heat transfer oil supply equipment. When the heat transfer oil needs to be preheated before the equipment starts up or when only virgin material is produced, the heat transfer oil in the heat transfer oil supply equipment can be heated independently, thus well meeting the production needs of various working conditions. [Attached Image Description]

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0040] Figure 1 This is an overall structural diagram of an asphalt mixture counter-current thermal recycling tail gas treatment device according to the present invention.

[0041] Figure 2 This is a connection structure diagram of the heat exchanger, incinerator, and heat transfer oil supply equipment in this invention;

[0042] Figure 3 This is a structural diagram of the present invention when only an incinerator and a burner are used to heat the heat transfer oil in the heat transfer oil supply equipment;

[0043] Figure 4 This is a block diagram illustrating the principle of the thermal regeneration exhaust gas treatment device of the present invention when treating counter-current thermal regeneration exhaust gas.

[0044] Figure 5 This is a block diagram illustrating the principle of the thermal regeneration exhaust gas treatment device of the present invention when only the heat transfer oil of the heat transfer oil supply device is heated.

[0045] BRIEF DESCRIPTION OF DRAWINGS

[0046] thermal regeneration tail gas treatment device 100

[0047] regeneration drying drum 200

[0048] regeneration material elevator 300

[0049] gravity settling chamber 1, second air duct 11, weight switch 12, chute 13

[0050] dust collector 2, third air duct 21, screw conveyor 22

[0051] inducer 3, fourth air duct 31

[0052] heat exchanger 4, first input port 41, second input port 42, first output port 43, second output port 44

[0053] incinerator 5, first air door 51, second air door 52, burner 53, fourth air duct 54

[0054] heat conducting oil supply device 6, third air door 61, fourth air door 62, heat conducting oil furnace 63, heat conducting oil delivery pipeline 631, second chimney 64, circulating pump 65, heat conducting oil storage tank 66, fifth temperature detector 67

[0055] first chimney 7, fifth air door 71

[0056] first temperature detector 81, second temperature detector 82, third temperature detector 83, fourth temperature detector 84

[0057] chimney transition joint 9, first shunt outlet 91, second shunt outlet 92, first air duct 921

DETAILED DESCRIPTION

[0058] In order to better understand the technical solutions of the present application, the technical solutions of the present application will be described in detail below in combination with the drawings of the specification and specific embodiments.

[0059] It should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing these embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. In addition, the terms "first", "second" and the like are only for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" and the like can explicitly or implicitly include one or more of the features.

[0060] Embodiment one

[0061] Please refer to Figures 1 to 5 The asphalt mixture countercurrent heat regeneration tail gas treatment device 100 shown in the figure, the heat regeneration tail gas treatment device 100 comprises:

[0062] The gravity settling chamber 1, the input end of the gravity settling chamber 1 is connected with the feeding end of the regeneration drying drum 200; wherein the regeneration drying drum 200 adopts countercurrent heating mode, the regeneration drying drum 200 will output countercurrent heat regeneration tail gas in the process of working, by connecting the feeding end of the regeneration drying drum 200 with the gravity settling chamber 1, the countercurrent heat regeneration tail gas can be sent into the gravity settling chamber 1 for gravity settling filtration;

[0063] The dust collector 2, the input end of the dust collector 2 is connected with the output end of the gravity settling chamber 1, so as to further filter the countercurrent heat regeneration tail gas output by the gravity settling chamber 1 by using the dust collector 2;

[0064] The induced draft fan 3, the input end of the induced draft fan 3 is connected with the output end of the dust collector 1; when working, the countercurrent heat regeneration tail gas output by the regeneration drying drum 200 will first enter the gravity settling chamber 1 for gravity settling under the negative pressure traction of the induced draft fan 3, and the coarse dust particles with particle size ≥0.075mm can be filtered out after gravity settling; the countercurrent heat regeneration tail gas treated by the gravity settling chamber 1 will re-enter the dust collector 2 under the negative pressure traction of the induced draft fan 3, and the fine dust particles with particle size <0.075mm can be filtered out by the dust collector 2;

[0065] The heat exchanger 4 has a first input port 41, a second input port 42, a first output port 43 connected with the first input port 41, and a second output port 44 connected with the second input port 42, the first input port 41 is connected with the output end of the induced draft fan 3, and the countercurrent heat regeneration tail gas sent out by the dust remover 1 enters into the heat exchanger 4 under the action of the induced draft fan 3 through the first input port 41; when the first input port 41 and the first output port 43 form the shell side of the heat exchanger 4, the second input port 42 and the second output port 44 form the tube side of the heat exchanger 4, and vice versa, which can be set according to actual needs;

[0066] The incinerator 5 is connected with the first output port 43 through a first air door 51, and the output end of the incinerator 5 is connected with the second input port 42 through a second air door 52, and the output end of the incinerator 5 is connected with the second input port 42 through a fourth induced draft pipe 54, and the second air door 52 is arranged on the fourth induced draft pipe 54, the incinerator 5 is provided with a burner 53, the burner 53 is a device for mixing and burning fuel and air in a certain way, which belongs to the prior art, so the burner 53 will not be described in detail here; when the countercurrent heat regeneration tail gas enters into the heat exchanger 4 through the first input port 41, it can enter into the incinerator 5 through the first output port 43 and the first air door 51 for incineration and purification, after incineration and purification, the harmful substances in the countercurrent heat regeneration tail gas will be basically cracked into carbon dioxide and water, so that the discharged countercurrent heat regeneration tail gas can meet the environmental protection requirements; the temperature of the countercurrent heat regeneration tail gas after incineration and purification will be increased, and the specific temperature can reach more than 800℃, and under the positive pressure of the induced draft fan 3 and the blower (not shown) of the burner 53, the heated countercurrent heat regeneration tail gas can be sent into the heat exchanger 4 through the second air door 52 and the second input port 42 for heat exchange, that is, the heated countercurrent heat regeneration tail gas is used to preheat the countercurrent heat regeneration tail gas which has not been incinerated and input through the first input port 41, after heat exchange, the temperature of the countercurrent heat regeneration tail gas which has not been incinerated can be increased to 450℃-500℃, and the temperature of the incinerated and heated countercurrent heat regeneration tail gas can be decreased to 400℃-500℃, in this way, the heat energy of the incinerated and heated countercurrent heat regeneration tail gas can be recycled, so that the fuel consumption can be reduced, the energy saving purpose can be achieved, and the environmental protection requirements can be met;

[0067] The heat conducting oil supply device 6 is connected with the incinerator 5 through a third air door 61, and is also connected with the second output port 44 through a fourth air door 62; when the asphalt mixture is produced by using the regenerative drying drum 200, the third air door 61 is in a closed state, and the first air door 51, the second air door 52 and the fourth air door 62 are all in an open state; when the heat conducting oil needs to be preheated before the equipment is started or only the raw materials are produced, the third air door 61 is in an open state, and the first air door 51, the second air door 52 and the fourth air door 62 are all in a closed state.

[0068] The first chimney 7 is connected with the second output port 44 through a fifth air door 71; when working, after the countercurrent heat regeneration tail gas after heat exchange is output through the second output port 44, part of the countercurrent heat regeneration tail gas can be delivered to the heat conducting oil supply device 6 through the fourth air door 62, that is, the countercurrent heat regeneration tail gas is directly used to heat the heat conducting oil of the heat conducting oil supply device 6, and an additional heat source is not needed, so that the energy saving effect can be better realized, and the other part of the countercurrent heat regeneration tail gas can be discharged through the first chimney 7 through the fifth air door 71.

[0069] By adopting the technical scheme of the present application, at least the following beneficial effects are achieved:

[0070] 1. The incinerator 5 is used to incinerate the countercurrent heat regeneration tail gas generated by the regenerative drying drum 200, so that the harmful substances in the countercurrent heat regeneration tail gas can be completely purified, thereby ensuring that the discharged countercurrent heat regeneration tail gas can meet the environmental protection requirements; the countercurrent heat regeneration tail gas after incineration and purification enters the heat exchanger 4 and exchanges heat with the countercurrent heat regeneration tail gas which has not been incinerated, so that the countercurrent heat regeneration tail gas which has not been incinerated can be preheated, the fuel consumption of the burner 53 can be effectively reduced, the energy saving purpose can be achieved, the temperature of the discharged tail gas can also meet the environmental protection requirements; at the same time, part of the countercurrent heat regeneration tail gas after heat exchange is introduced into the heat conducting oil supply device 6, and the countercurrent heat regeneration tail gas is directly used to heat the heat conducting oil of the heat conducting oil supply device 6, without the need of providing an additional heat source, so that the energy saving effect can be further realized, and the production cost can be greatly reduced.

[0071] 2. The gravity settling chamber 1 and the dust collector 2 are arranged at the output end of the regenerative drying drum 200, and most of the dust in the countercurrent heat regeneration tail gas can be reliably filtered out through the cooperation of the gravity settling chamber 1 and the dust collector 2, so that the adverse effects of the dust on the subsequent induced draft fan 3, the heat exchanger 4 and the like can be reduced, and the service life of the induced draft fan 3, the heat exchanger 4 and the like can be prolonged.

[0072] 3. When the asphalt mixture is produced by using the regenerative drying roller 200, the generated reverse flow heat regeneration tail gas can be effectively purified and treated, and the heat conducting oil in the heat conducting oil supply device 6 can be heated; when the heat conducting oil needs to be preheated before the device is started or only virgin material is produced, the heat conducting oil in the heat conducting oil supply device 6 can be independently heated, so that the production requirements of various different working conditions can be well met.

[0073] In some embodiments of the present application, the first input port 41 is provided with a first temperature detector 81, the first output port 43 is provided with a second temperature detector 82, the output end of the incinerator 5 is provided with a third temperature detector 83, and the second output port 44 is provided with a fourth temperature detector 84; wherein the first temperature detector 81 is used to detect the initial temperature of the reverse flow heat regeneration tail gas; the second temperature detector 82 is used to detect the temperature of the reverse flow heat regeneration tail gas after preheating by the heat exchanger 4; the third temperature detector 83 is used to detect the temperature in the incinerator 5, so as to adjust the firepower of the burner 53 according to the temperature in the incinerator 5, so as to control the temperature in the incinerator 5 between 800-850℃; and the fourth temperature detector 84 is used to detect the temperature of the reverse flow heat regeneration tail gas after heat exchange and ready to be discharged.

[0074] In some embodiments of the present application, the heat conducting oil supply device 6 comprises:

[0075] The heat conducting oil furnace 63 is connected with the output end of the incinerator 5 through the third air door 61 and connected with the second output port 44 through the fourth air door 62, and the heat conducting oil furnace 63 is provided with a heat conducting oil conveying pipeline 631, so as to convey the heated heat conducting oil to the equipment in need of use or convey the heat conducting oil in the related equipment back to the heat conducting oil furnace 63 for heating by using the heat conducting oil conveying pipeline 631;

[0076] The second chimney 64 is connected with the hot air output end of the heat conducting oil furnace 63, so as to discharge the heat exchanged tail gas through the second chimney 64;

[0077] The circulating pump 65 is arranged on the heat conducting oil conveying pipeline 631, so as to drive the heat conducting oil in the heat conducting oil conveying pipeline 631 to circulate by using the circulating pump 65;

[0078] A heat conducting oil storage tank 66 is arranged on the heat conducting oil conveying pipeline 631, and the heat conducting oil storage tank 66 is provided with a fifth temperature detector 67; wherein the heat conducting oil storage tank 66 is used for storing heated heat conducting oil; the fifth temperature detector 67 is used for detecting the temperature of the heat conducting oil in the heat conducting oil storage tank 66, and in specific work, when the temperature of the heat conducting oil is less than the set temperature range, the fifth damper 71 is controlled to be small to increase the countercurrent heat regeneration tail gas entering the heat conducting oil supply device 6, and when the temperature of the heat conducting oil is greater than the set temperature range, the fifth damper 71 is controlled to be large to reduce the countercurrent heat regeneration tail gas entering the heat conducting oil supply device 6; at the same time, because the heat conducting oil temperature of the supply device and the pipeline heating and heat preservation in the asphalt mixing device is generally set to be between 180 DEG C and 200 DEG C, therefore the set temperature range can be set to be between 180 DEG C and 200 DEG C.

[0079] In some embodiments of the present application, in order to better realize the shunting of the countercurrent heat regeneration tail gas output by the heat exchanger 4, the second output port 44 is connected with a chimney transition joint 9, the chimney transition joint 9 has a first shunt outlet 91 and a second shunt outlet 92, the first shunt outlet 91 is connected with the first chimney 7 through the fifth damper 71, so that a part of the countercurrent heat regeneration tail gas is transported to the first chimney 7 through the first shunt outlet 91 and discharged, the second shunt outlet 92 is connected with the input end of the heat conducting oil supply device 6 through a first air duct 921, and the fourth damper 62 is arranged on the first air duct 921, so that another part of the countercurrent heat regeneration tail gas is transported to the heat conducting oil supply device 6 through the second shunt outlet 92.

[0080] In some embodiments of the present application, the top of the gravity settling chamber 1 is connected with the input end of the dust remover 2 through a second air duct 11, the bottom of the gravity settling chamber 1 is provided with a weight switch 12, and the weight switch 12 is connected with the regenerated material elevator 300 through a chute 13.

[0081] In some embodiments of the present application, the top of the gravity settling chamber 1 is connected with the input end of the dust remover 2 through a second air duct 11, the bottom of the gravity settling chamber 1 is provided with a weight switch 12, and the weight switch 12 is connected with the regenerated material elevator 300 through a chute 13.

[0082] In some embodiments of the present application, in order to better play the dust filtering role of the countercurrent heat regeneration tail gas, the dust collector 2 is a cyclone dust collector, the top of the dust collector 2 is connected with the input end of the induced draft fan 3 through a third induced draft pipe 21, and the bottom of the dust collector 2 is connected with a powder elevator (not shown) through a spiral conveyor 22, so as to realize the conveying of the fine dust particles filtered out by the dust collector 2 to the powder elevator for use as powder raw material, avoiding waste; the output end of the induced draft fan 3 is connected with the first input port 41 through a fourth induced draft pipe 31.

[0083] In some embodiments of the present application, the first air door 51, the second air door 52, the third air door 61 and the fourth air door 62 are all pneumatic air doors, the fifth air door 71 is an electrically adjusted air door, and the first air door 51, the second air door 52, the third air door 61, the fourth air door 62 and the fifth air door 71 all adopt high-temperature-resistant air doors to avoid damage of the air doors due to high temperature; at the same time, in the specific implementation of the present application, the heat regeneration tail gas treatment device 100 further comprises a PLC control device, and the first air door 51, the second air door 52, the third air door 61, the fourth air door 62, the fifth air door 71, the first temperature detector 81, the second temperature detector 82, the third temperature detector 83, the fourth temperature detector 84, the burner 53 and the like are all electrically connected with the PLC control device, so that the PLC control device can control each air door and the like according to the detected temperature.

[0084] The outside of the first air door 51, the second air door 52, the third air door 61, the fourth air door 62, the heat exchanger 4, the incinerator 5 and the heat conducting oil supply device 6 is all covered with thermal insulation cotton (not shown) to realize the thermal insulation function and reduce heat loss.

[0085] Embodiment two

[0086] Please refer to Figures 1 to 5 The processing method of the asphalt mixture countercurrent heat regeneration tail gas treatment device 100 shown in the figure, wherein the specific structure of the heat regeneration tail gas treatment device 100 and the technical effects that can be obtained are exactly the same as those of embodiment one, and specific details are referred to the detailed introduction of embodiment one, which will not be repeated here.

[0087] Please refer to Figure 4 The processing method comprises the following steps:

[0088] When the asphalt mixture is produced by using the regeneration drying drum 200, the first air door 51, the second air door 52 and the fourth air door 62 are controlled to be in the open state, so that the countercurrent heat regeneration tail gas can enter into the incinerator 5 for incineration and enter into the heat exchanger 4 for heat exchange, and the third air door 61 is controlled to be in the closed state.

[0089] The control air blower 3 works, and the countercurrent hot regeneration tail gas output by the regeneration drying roller 200 is sent into the gravity settling chamber 1 to be filtered by gravity settling, so as to filter out coarse dust particles with a particle size of greater than or equal to 0.075 mm, and the filtered coarse dust particles are transported to the regeneration material elevator 300, so as to continue to use the coarse dust particles as regeneration materials, thereby avoiding waste; the countercurrent hot regeneration tail gas filtered by gravity settling is continuously transported to the dust collector 2 to be filtered, so as to filter out fine dust particles with a particle size of less than 0.075 mm, and the filtered fine dust particles are transported to the powder elevator, so as to continue to use the fine dust particles as powder raw materials, thereby avoiding waste.

[0090] The burner 53 of the incinerator 5 works, the filtered countercurrent hot regeneration tail gas is input into the heat exchanger 4 through the first input port 41, and then is transported into the incinerator 5 through the first output port 43 to be incinerated and purified, so that harmful substances in the countercurrent hot regeneration tail gas are cracked into carbon dioxide and water; the countercurrent hot regeneration tail gas after incineration and purification is sent into the heat exchanger 4 through the second input port 42 to be heat-exchanged, so as to preheat the countercurrent hot regeneration tail gas input through the first input port 41, thereby increasing the temperature of the countercurrent hot regeneration tail gas which has not been incinerated to 450-500 DEG C, and the temperature of the countercurrent hot regeneration tail gas after incineration and temperature rising is decreased to 400-500 DEG C after heat exchange.

[0091] Part of the countercurrent hot regeneration tail gas output after heat exchange is discharged through the first chimney 7, and the other part of the countercurrent hot regeneration tail gas is transported to the heat conducting oil supply device 6, so as to heat the heat conducting oil of the heat conducting oil supply device 6 by using the countercurrent hot regeneration tail gas, without providing an additional heat source, thereby further achieving the effect of energy saving and greatly reducing the production cost.

[0092] In some embodiments of the present application, please refer to Figure 5 The processing method further includes the following steps:

[0093] When the countercurrent hot regeneration tail gas does not need to be processed, that is, when the heat conducting oil needs to be preheated before the equipment is started or only raw materials are produced, the first air door 51, the second air door 52 and the fourth air door 62 are controlled to be in a closed state, the third air door 61 is controlled to be in an open state, and the burner 53 works to generate hot gas which can be transported to the heat conducting oil supply device 6;

[0094] The burner 53 of the incinerator 5 works, the filtered countercurrent hot regeneration tail gas is input into the heat exchanger 4 through the first input port 41, and then is transported into the incinerator 5 through the first output port 43 to be incinerated and purified, so that harmful substances in the countercurrent hot regeneration tail gas are cracked into carbon dioxide and water; the countercurrent hot regeneration tail gas after incineration and purification is sent into the heat exchanger 4 through the second input port 42 to be heat-exchanged, so as to preheat the countercurrent hot regeneration tail gas input through the first input port 41, thereby increasing the temperature of the countercurrent hot regeneration tail gas which has not been incinerated to 450-500 DEG C, and the temperature of the countercurrent hot regeneration tail gas after incineration and temperature rising is decreased to 400-500 DEG C after heat exchange.

[0095] In some embodiments of the present application, when the burner 53 of the incinerator 5 is working, the temperature in the incinerator 5 is detected, and the fire power of the burner 53 is adjusted according to the temperature in the incinerator 5, so as to control the temperature in the incinerator 5 between 800℃ and 850℃, so as to effectively incinerate the countercurrent hot regeneration tail gas, and ensure that the harmful substances in the countercurrent hot regeneration tail gas can be cracked into carbon dioxide and water;

[0096] When the other part of the countercurrent hot regeneration tail gas is delivered to the heat conducting oil supply device 6, the temperature of the heat conducting oil in the heat conducting oil supply device 6 is detected, when the temperature of the heat conducting oil is less than the set temperature range, the fifth damper 71 is controlled to be closed to increase the countercurrent hot regeneration tail gas entering the heat conducting oil supply device 6, when the temperature of the heat conducting oil is greater than the set temperature range, the fifth damper 71 is controlled to be opened to reduce the countercurrent hot regeneration tail gas entering the heat conducting oil supply device 6, so as to control the temperature of the heat conducting oil in the set temperature range (i.e. between 180℃ and 200℃), so as to meet the equipment use requirements.

[0097] Although the specific embodiments of the present application are described above, those skilled in the art should understand that the specific embodiments described are only illustrative, and are not intended to limit the scope of the present application, and equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present application should be covered within the scope of the claims of the present application.

Claims

1. An asphalt mixture counterflow heat recycling tail gas treatment device, characterized in that, The application relates to a processing method and a processing device for asphalt mixture. The processing device comprises: a gravity settling chamber, an input end of which is connected with a feeding end of a regenerative drying drum; a dust remover, an input end of which is connected with an output end of the gravity settling chamber; an air induction fan, an input end of which is connected with an output end of the dust remover; a heat exchanger, which has a first input port, a second input port, a first output port connected with the first input port and a second output port connected with the second input port, the first input port being connected with an output end of the air induction fan; an incinerator, an input end of which is connected with the first output port through a first air door, an output end of which is connected with the second input port through a second air door, the incinerator being provided with a burner; a heat conducting oil supply device, an input end of which is connected with the incinerator through a third air door and is also connected with the second output port through a fourth air door; 2. The asphalt mixture counter-flow heat recycling exhaust gas treatment device according to claim 1, characterized in that, a first chimney, which is connected with the second output port through a fifth air door.

3. The asphalt mixture counter-flow thermal regeneration exhaust gas treatment device of claim 1, wherein, The first input port is provided with a first temperature detector, the first output port is provided with a second temperature detector, the output end of the incinerator is provided with a third temperature detector, and the second output port is provided with a fourth temperature detector. The heat conducting oil supply device comprises: a heat conducting oil furnace, a hot air input end of which is connected with the output end of the incinerator through the third air door and is also connected with the second output port through the fourth air door, the heat conducting oil furnace being provided with a heat conducting oil conveying pipeline; a second chimney, which is connected with a hot air output end of the heat conducting oil furnace; a circulating pump, which is arranged on the heat conducting oil conveying pipeline; 4. The asphalt mixture counter-flow thermal regeneration exhaust gas treatment device of claim 1, wherein, a heat conducting oil storage tank, which is arranged on the heat conducting oil conveying pipeline and is provided with a fifth temperature detector.

5. The asphalt mixture counter-flow thermal regeneration exhaust gas treatment device of claim 1, wherein, The second output port is connected with a chimney transition joint, the chimney transition joint has a first shunt outlet and a second shunt outlet, the first shunt outlet is connected with the first chimney through the fifth air door, the second shunt outlet is connected with the input end of the heat conducting oil supply device through a first air induction pipe, and the fourth air door is arranged on the first air induction pipe.

6. The asphalt mixture counter-flow thermal reclaiming exhaust gas treatment device according to claim 1, characterized in that, A top of the gravity settling chamber is connected with an input end of the dust remover through a second air induction pipe, a bottom of the gravity settling chamber is provided with a weight switch, and the weight switch is connected with a regenerative material elevator through a chute.

7. The asphalt mixture countercurrent thermal regeneration exhaust gas treatment device of claim 1, wherein, The dust remover is a cyclone dust remover, a top of the dust remover is connected with an input end of the air induction fan through a third air induction pipe, a bottom of the dust remover is connected with a powder material elevator through a screw conveyor, and an output end of the air induction fan is connected with the first input port through a fourth air induction pipe.

8. A method of processing based on the asphalt mixture countercurrent heat regeneration tail gas treatment device according to any one of claims 1-7, characterized in that, The first air door, the second air door, the third air door and the fourth air door are all pneumatic air doors, the fifth air door is an electrically-controlled air door, and the first air door, the second air door, the third air door, the fourth air door, the heat exchanger, the incinerator and the heat conducting oil supply device are all wrapped with heat insulation cotton. The processing method comprises the following steps: when the regenerative drying drum is used for asphalt mixture production, the first air door, the second air door and the fourth air door are controlled to be in an open state, and the third air door is controlled to be in a closed state. The control of the air induction fan works, and the reverse flow hot regeneration tail gas output by the regeneration drying roller is sent into the gravity settling chamber for gravity settling filtration, and the coarse dust particles generated by the filtration are transported to the regeneration material elevator; the reverse flow hot regeneration tail gas after the gravity settling filtration is continuously transported to the dust collector for dust removal filtration, and the fine dust particles generated by the filtration are transported to the powder elevator; The control of the burner of the incinerator works, and the filtered reverse flow hot regeneration tail gas is input into the heat exchanger through the first input port, and then is transported into the incinerator through the first output port for incineration and purification; the reverse flow hot regeneration tail gas after the incineration and purification is sent into the heat exchanger through the second input port for heat exchange, so as to preheat the reverse flow hot regeneration tail gas input through the first input port; Part of the reverse flow hot regeneration tail gas output after the heat exchange is discharged through the first chimney, and the other part of the reverse flow hot regeneration tail gas is transported to the heat conducting oil supply device to heat the heat conducting oil of the heat conducting oil supply device by using the reverse flow hot regeneration tail gas.

9. The method of claim 8, wherein the asphalt mixture counterflow heat- regenerated exhaust gas treatment device is characterized by, The processing method further comprises the following steps: When the reverse flow hot regeneration tail gas does not need to be processed, the first air door, the second air door and the fourth air door are controlled to be in the closed state, and the third air door is controlled to be in the open state; The control of the burner of the incinerator works, and the hot gas generated by the work of the burner is transported to the heat conducting oil supply device to heat the heat conducting oil of the heat conducting oil supply device by the hot gas; at the same time, the temperature of the heat conducting oil in the heat conducting oil supply device is detected, and the firepower of the burner is adjusted according to the temperature of the heat conducting oil, so that the temperature of the heat conducting oil is controlled to be between 180℃ and 200℃.

10. The method of claim 8, wherein the asphalt mixture counter-flow thermal regeneration exhaust gas treatment apparatus is characterized by, When the burner of the incinerator is controlled to work, the temperature in the furnace of the incinerator is detected, and the firepower of the burner is adjusted according to the temperature in the furnace, so that the temperature in the furnace of the incinerator is controlled to be between 800℃ and 850℃; When the other part of the reverse flow hot regeneration tail gas is transported to the heat conducting oil supply device, the temperature of the heat conducting oil in the heat conducting oil supply device is detected, when the temperature of the heat conducting oil is less than the set temperature range, the fifth air door is controlled to be small to increase the reverse flow hot regeneration tail gas entering the heat conducting oil supply device; when the temperature of the heat conducting oil is greater than the set temperature range, the fifth air door is controlled to be large to reduce the reverse flow hot regeneration tail gas entering the heat conducting oil supply device.

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