Energy-saving plant-mixed hot regeneration combined device and production method

Abstract

The application provides an energy-saving plant-mixing heat regeneration combined device and a production method, which comprises a regenerated material conveying and lifting mechanism, a countercurrent heating type regeneration drying roller connected with the regenerated material conveying and lifting mechanism, a first waste gas chamber connected with the countercurrent heating type regeneration drying roller, the bottom of the first waste gas chamber being connected with the regenerated material conveying and lifting mechanism, and the top of the first waste gas chamber being connected with a regeneration cloth bag dust collector, a cocurrent heating type regeneration drying roller connected with the countercurrent heating type regeneration drying roller, a combustion mechanism connected with the cocurrent heating type regeneration drying roller, a second waste gas chamber connected with the cocurrent heating type regeneration drying roller, the bottom of the second waste gas chamber being connected with a regenerated material storage bin, a burning and heat exchanging mechanism connected with the countercurrent heating type regeneration drying roller, the second waste gas chamber being connected with the combustion mechanism and the burning and heat exchanging mechanism respectively, and a raw material feeding mechanism and a mixing and stirring cylinder. The application has the advantages that the service life of the cloth bag dust collector is prolonged, the overall energy consumption of the device is reduced, and the aging of fine materials is avoided.

Description

[0001] The present application relates to the technical field of hot recycling equipment of asphalt mixture, and particularly relates to an energy-saving plant-mixed hot recycling combined equipment and a production method.

[0002] The hot recycling technology of asphalt mixture is a technology for recycling waste asphalt mixture. In the existing plant-mixed hot recycling technology, cold waste asphalt mixtures of various gradations are simultaneously sent into a drying and heating system for drying and heating treatment, and then are mixed with new aggregates, asphalt, mineral powder and the like in a certain proportion to finally produce qualified asphalt mixture finished products. However, the current plant-mixed hot recycling mode has the following problems.

[0003] (1) The recycling drying and heating forms are divided into two types of forward-flow heating and reverse-flow heating. The forward-flow heating mainly refers to the same direction running of the material and the heating gas. The tail gas temperature of this production mode is relatively high, and the treatment method is to introduce the recycling tail gas into the primary drying drum for secondary combustion, and then discharge the tail gas after filtering treatment by the primary drying drum and the primary bag-type dust collector. This form has certain limitations. The tail gas amount of the recycling treatment is limited by the primary drying drum and the primary bag-type dust collector, thereby restricting the recycling yield. Therefore, when it is necessary to further improve the recycling yield, the current conventional method is to use the reverse-flow heating. The reverse-flow heating mainly refers to the reverse running of the material and the heating gas. The thermal efficiency of this production mode is relatively high, and the tail gas temperature is lower than that of the forward-flow heating. Therefore, the recycling tail gas is directly introduced into the primary bag-type dust collector to be mixed and filtered with the tail gas generated during the production of the primary material, and then is discharged, or the recycling and primary equipment are respectively provided with a bag-type dust collector for separate treatment. The existing problems of this mode are as follows: the recycling tail gas is not subjected to secondary combustion treatment. Although a certain amount of powder in the bag-type dust collector adsorbs part of the asphalt fume in the recycling tail gas, residual asphalt fume is still not adsorbed, and thus the residual asphalt fume is discharged from the equipment through the bag-type dust collector to cause environmental pollution. In view of this, the existing technology further proposes to burn the recycling tail gas by a burning furnace after the recycling bag-type dust collector, so as to ensure that the discharged gas meets the qualified discharge standard. However, there are still problems such as that the recycling bag-type dust collector is easily polluted by the asphalt fume, the service life is short, the tail gas temperature after the secondary combustion of the asphalt fume by the burning furnace is relatively high, and the overall energy consumption of the equipment is high.

[0004] ​​(2) In the existing technology, coarse and fine aggregates in waste asphalt mixtures are heated in the drying drum at the same time, which makes it difficult to ensure the uniformity of heating of the coarse and fine aggregates. Under the same environment, fine aggregates are heated more easily than coarse aggregates, which can easily lead to excessively high temperatures of fine aggregates during the heating process, resulting in severe asphalt aging on the surface of the fine aggregates. Since the asphalt content in the fine aggregates accounts for a large proportion of the waste asphalt mixture, once the asphalt in the fine aggregates ages, it will greatly reduce the quality of the waste asphalt mixture and ultimately affect the quality of the finished product. In addition, the fine aggregates are heated quickly and are very easy to stick to the wall of the recycling drying drum, which reduces the performance of the recycling drying drum.

[0005] In view of the aforementioned problems, the inventors of this case conducted in-depth research on these problems, which led to the creation of this case. [Summary of the Invention]

[0006] The technical problem to be solved by the present invention is to provide an energy-saving plant-mixed hot recycling combined equipment and production method, which solves the problems of existing technology, such as the recycling bag dust collector being easily polluted by asphalt fume, short service life, high temperature of exhaust gas emitted after secondary combustion of asphalt fume in the incinerator leading to high overall energy consumption of the equipment, and the asphalt aging caused by excessively high temperature of fine materials during heating process, which easily adheres to the wall of the recycling drying drum and reduces the performance of the recycling drying drum.

[0007] This invention is implemented as follows:

[0008] Firstly, an energy-saving plant-mixed hot regeneration combined equipment includes:

[0009] Recycled material conveying and lifting mechanism;

[0010] A counter-current heating type regenerated drying drum, wherein the recycled material conveying and lifting mechanism is connected to the feed end of the counter-current heating type regenerated drying drum;

[0011] The first exhaust chamber is connected in the middle to the feed end of the counter-current heating regenerated drying drum, the lower end of the first exhaust chamber is connected to the recycled material conveying and lifting mechanism, and the upper end of the first exhaust chamber is connected to a regenerated bag dust collector.

[0012] A co-current heating type regeneration drying drum, wherein the discharge end of the counter-current heating type regeneration drying drum is connected to the feed end of the co-current heating type regeneration drying drum;

[0013] A combustion mechanism, which is connected to the feed end of a co-current heating regeneration drying drum;

[0014] The discharge end of the co-current heating type regenerated drying drum is connected to the second exhaust chamber, and a recycled material storage bin is connected to the lower end of the second exhaust chamber.

[0015] The output end of the incineration heat exchange mechanism is connected with the discharge end of the countercurrent heating type regeneration drying drum, and the upper end of the second waste gas chamber is connected with the input end of the incineration heat exchange mechanism and the combustion mechanism respectively.

[0016] The raw material supply mechanism is connected with a raw cloth bag dust collector.

[0017] The mixed stirring cylinder is connected with the raw material supply mechanism and the regeneration material storage bin to convey the mixed material.

[0018] Further, the discharge end of the countercurrent heating type regeneration drying drum is provided with a discharge box body, a screen structure is arranged at one end close to the countercurrent heating type regeneration drying drum in the discharge box body, and a regeneration material conveying device is connected with the regeneration material storage bin at the bottom position corresponding to the screen structure.

[0019] The bottom of the discharge box body away from the countercurrent heating type regeneration drying drum is connected with the feeding end of the cocurrent heating type regeneration drying drum through a feeding box body, and the output end of the incineration heat exchange mechanism is connected with the end of the discharge box body away from the countercurrent heating type regeneration drying drum.

[0020] Further, the incineration heat exchange mechanism comprises:

[0021] An incinerator;

[0022] A first burner, the output end of which is connected with the input end of the incinerator;

[0023] 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, and the first output port is connected with the input end of the incinerator;

[0024] A vertical furnace body, the lower end of which is connected with the output end of the incinerator, the upper end of which is connected with the second input port of the heat exchanger, and the second output port of the heat exchanger is connected with the discharge end of the countercurrent heating type regeneration drying drum;

[0025] A secondary combustion fan, the output end of which is connected with the first input port of the heat exchanger, and the upper end of the second waste gas chamber is connected with the input end of the secondary combustion fan.

[0026] Further, the combustion mechanism comprises:

[0027] A hot blast stove, the output end of which is connected with the feeding end of the cocurrent heating type regeneration drying drum;

[0028] A second burner, which is connected with the input end of the hot blast stove.

[0029] Further, the cyclone dust collector is further included; the upper end of the second waste gas chamber is connected with the cyclone dust collector, the lower end of the cyclone dust collector is connected with the regenerated material storage bin, the regenerated material storage bin is provided with a regenerated material metering scale below; the upper end of the cyclone dust collector is connected with the incineration heat exchange mechanism through a first flue, the combustion mechanism is connected with the first flue through a second flue, and the second flue is provided with a return air fan.

[0030] Further, the raw material supply mechanism includes:

[0031] The countercurrent heating type raw material drying roller is connected with the raw bag dust collector through a third flue at the feeding end of the countercurrent heating type raw material drying roller;

[0032] The third burner is connected with the discharging end of the countercurrent heating type raw material drying roller;

[0033] The raw material belt conveyor is connected with the feeding end of the countercurrent heating type raw material drying roller at one end, and the raw material belt conveyor is provided with a raw material bin above;

[0034] The raw material elevator is connected with the discharging end of the countercurrent heating type raw material drying roller;

[0035] The raw hot material bin is connected with the discharging end of the raw material elevator, and the raw hot material bin is provided with a raw material metering scale at the bottom;

[0036] The powder bin is connected with the mixing and stirring cylinder through a powder metering scale;

[0037] The asphalt tank is connected with the mixing and stirring cylinder through an asphalt metering scale.

[0038] Further, the regenerated material conveying and lifting mechanism includes:

[0039] The regenerated material belt conveyor is connected with the feeding end of the countercurrent heating type raw material drying roller at one end, and the raw material belt conveyor is provided with a raw material bin above;

[0040] The regenerated material belt conveyor is connected with the feeding end of the countercurrent heating type raw material drying roller at one end, and the raw material belt conveyor is provided with a raw material bin above;

[0041] In a second aspect, a production method of an energy-saving plant-mixed hot regeneration combined device is provided, and the production method includes the following steps:

[0042] The recycled coarse aggregate is transported into the countercurrent heating type recycled drying drum through a recycled material conveying mechanism, and the incineration and heat exchange mechanism is used to incinerate and exchange heat of the recycled tail gas generated by the countercurrent heating type recycled drying drum, the recycled tail gas after heat exchange is sent into the countercurrent heating type recycled drying drum to preliminarily heat and dry the recycled coarse aggregate, and the recycled tail gas output by the countercurrent heating type recycled drying drum is first conveyed into the first waste gas chamber to be gravity sedimentation filtered, and then the filtered recycled tail gas is conveyed into the recycled bag dust collector to be bag dusted.

[0043] The preliminarily heated and dried recycled coarse aggregate is sent into the countercurrent heating type recycled drying drum, the combustion mechanism is used to generate high-temperature hot gas and convey the high-temperature hot gas into the countercurrent heating type recycled drying drum to further heat and warm the recycled coarse aggregate, so that the temperature of the recycled coarse aggregate is raised to a required temperature, and the further heated and warmed recycled coarse aggregate is stored in the recycled material storage bin, the recycled tail gas generated by the countercurrent heating type recycled drying drum is conveyed into the second waste gas chamber to be gravity sedimentation filtered, and part of the filtered recycled tail gas is conveyed to the incineration and heat exchange mechanism, and the other part of the filtered recycled tail gas is conveyed to the combustion mechanism.

[0044] According to the required proportion of the recycled material, the raw material, the powder and the asphalt, the weighed recycled material, raw material, powder and asphalt are conveyed into the mixing and stirring cylinder to be mixed and stirred.

[0045] Further, the step of sending the preliminarily heated and dried recycled coarse aggregate into the countercurrent heating type recycled drying drum specifically comprises: screening the preliminarily heated and dried recycled coarse aggregate by using a screen structure, conveying the screened recycled fine aggregate directly to the recycled material storage bin through a recycled material conveying device, and sending the remaining recycled coarse aggregate after screening into the countercurrent heating type recycled drying drum.

[0046] Further, the production method comprises the following steps:

[0047] The raw material is conveyed into the countercurrent heating type raw drying drum, and the third burner is used to generate hot gas and convey the hot gas into the countercurrent heating type raw drying drum to dry and heat the raw material, so that the temperature of the raw material is raised to a required temperature, the dried and heated raw material is conveyed into the raw hot material bin through a raw material elevator to be stored, and the raw tail gas generated by the countercurrent heating type raw drying drum is conveyed into the raw bag dust collector to be bag dusted.

[0048] By adopting the technical scheme of the present application, at least the following beneficial effects are achieved:

[0049] 1. The energy-saving plant-mixed hot regeneration combined device comprises a countercurrent heating type regeneration drying drum and a cocurrent heating type regeneration drying drum, most of the regeneration tail gas output by the cocurrent heating type regeneration drying drum is sent to a incineration heat exchange mechanism for incineration and heat exchange treatment, and the regeneration tail gas after incineration treatment is delivered to the countercurrent heating type regeneration drying drum for preliminary heating and drying of the cold material of the regenerated coarse aggregate, and a small part of the regeneration tail gas is delivered to a combustion mechanism for recycling, which not only can effectively remove the asphalt smoke in the regeneration tail gas, ensure that the discharged gas meets the discharge standard, and the regeneration bag dust collector is not polluted by the asphalt smoke, can prolong the service life of the regeneration bag dust collector, but also can utilize the high-temperature regeneration tail gas after incineration treatment, can reduce the overall energy consumption of the device, and achieve the purpose of energy saving.

[0050] 2. The regeneration and virgin are independently matched with bag dust collectors, namely the upper end of the first waste gas chamber is connected with the regeneration bag dust collector, and the virgin material supply mechanism is connected with the virgin bag dust collector, so that the regeneration and virgin can independently treat tail gas, and they do not interfere with each other, which is not only beneficial to realize large proportion of regenerated material addition, but also can solve the problem that in the prior art, the virgin device must be started at the same time when the regeneration device is started.

[0051] 3. A discharge box body is arranged at the discharge end of the countercurrent heating type regeneration drying drum, a screen structure is arranged at one end of the discharge box body close to the countercurrent heating type regeneration drying drum, and the bottom position of the discharge box body corresponding to the screen structure is connected with a regenerated material storage bin through a regenerated material conveying device, so that the regenerated fine aggregate screened out can be directly conveyed to the regenerated material storage bin during work, thereby effectively avoiding that the surface asphalt of the regenerated fine aggregate is aged due to too high temperature, and effectively solving the problem that the asphalt adheres to the cylinder wall of the regeneration drying drum to reduce the use performance. BRIEF DESCRIPTION OF DRAWINGS

[0052] The application will be further described below with reference to the drawings and embodiments.

[0053] Figure 1 is the overall structure diagram of the energy-saving plant-mixed hot regeneration combined device of the application;

[0054] Figure 2 is the connection structure diagram of the countercurrent heating type regeneration drying drum, the cocurrent heating type regeneration drying drum, the combustion mechanism and the incineration heat exchange mechanism in the application;

[0055] Figure 3 is the structure diagram of the regenerated material conveying and lifting mechanism in the application;

[0056] Figure 4 is the structure diagram of the virgin material supply mechanism in the application.

[0057] Explanation of reference signs:

[0058] Energy-saving plant-mixing heat regeneration combined equipment 100;

[0059] Regeneration material conveying and lifting mechanism 1, regeneration elevator 11, regeneration material belt conveyor 12, regeneration material bin 13, small-sized regeneration material conveyor 131;

[0060] Countercurrent heating type regeneration drying drum 2, discharge box 21, screen structure 22, regeneration material conveying device 23, feeding box 24;

[0061] First waste gas chamber 3, regeneration cloth bag dust collector 31;

[0062] Parallel flow heating type regeneration drying drum 4;

[0063] Combustion mechanism 5, hot blast stove 51, second burner 52;

[0064] Second waste gas chamber 6, regeneration material storage bin 61, regeneration material weighing scale 62;

[0065] Incineration heat exchange mechanism 7, incinerator 71, first burner 72, heat exchanger 73, first input port 731, second input port 732, first output port 733, second output port 734, vertical furnace body 74, secondary combustion air blower 75;

[0066] Virgin material supply mechanism 8, virgin cloth bag dust collector 81, countercurrent heating type virgin drying drum 82, third flue 821, third burner 83, virgin material belt conveyor 84, virgin material bin 85, small-sized virgin material conveyor 851, virgin material elevator 86, virgin hot material bin 87, virgin material weighing scale 871, powder bin 88, powder material weighing scale 881, asphalt tank 89, asphalt weighing scale 891;

[0067] Mixing and stirring cylinder 9;

[0068] Cyclone dust collector 10, first flue 101, second flue 102, return air blower 103.

DETAILED DESCRIPTION

[0069] 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.

[0070] 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 device or element 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 the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features.

[0071] Embodiment one

[0072] Please refer to Figures 1 to 4 The energy-saving plant-mixed hot regeneration combined device 100 shown in the figure, the energy-saving plant-mixed hot regeneration combined device 100 comprises:

[0073] The regenerated material conveying and lifting mechanism 1 is used for conveying and lifting the regenerated coarse aggregate to be stirred and mixed;

[0074] The countercurrent heating type regeneration drying drum 2, the regenerated material conveying and lifting mechanism 1 is connected with the feeding end of the countercurrent heating type regeneration drying drum 2, so as to send the regenerated coarse aggregate into the countercurrent heating type regeneration drying drum 2 by the regenerated material conveying and lifting mechanism 1; the countercurrent heating type regeneration drying drum 2 adopts a countercurrent heating mode, which mainly functions to preliminarily heat and dry the cold regenerated coarse aggregate by using the high-temperature regenerated tail gas generated by incineration, that is, to realize the pre-treatment of drying the moisture on the surface of the regenerated coarse aggregate, the temperature of the pre-treated regenerated coarse aggregate is lower than 100℃, and the moisture on the surface of the regenerated coarse aggregate can be basically dried;

[0075] The first waste gas chamber 3 is connected with the feeding end of the countercurrent heating type regenerative drying drum 2 in the middle part, so that the regenerated tail gas output by the countercurrent heating type regenerative drying drum 2 enters the first waste gas chamber 3 to perform gravity settling filtration, the lower end of the first waste gas chamber 3 is connected with the regenerative material conveying and lifting mechanism 1, and the upper end of the first waste gas chamber 3 is connected with a regenerative cloth bag dust collector 31; in working, the regenerated tail gas output by the countercurrent heating type regenerative drying drum 2 is first conveyed into the first waste gas chamber 3 to perform gravity settling filtration, the regenerated tail gas after the gravity settling filtration is input into the regenerative cloth bag dust collector 31 to perform dust removal filtration treatment, and the coarse particles generated in the gravity settling filtration are sent back to the regenerative material conveying and lifting mechanism 1 to continue to be used; because the temperature of the regenerated tail gas output by the countercurrent heating type regenerative drying drum 2 is relatively low, generally between 90-110℃, and because the countercurrent heating type regenerative drying drum 2 only preliminarily dries the moisture on the surface of the regenerative coarse aggregate, the temperature of the output material is not high, and the asphalt on the surface of the regenerative coarse aggregate has not been melted, therefore, the regenerated tail gas output from the countercurrent heating type regenerative drying drum 2 does not generate asphalt smoke, so that the regenerated tail gas output by the countercurrent heating type regenerative drying drum 2 only needs to be treated and filtered by the regenerative cloth bag dust collector 31 to remove the dust in the regenerated tail gas;

[0076] The countercurrent heating type regenerative drying drum 2 is connected with the feeding end of the countercurrent heating type regenerative drying drum 2, so that the regenerated coarse aggregate output by the countercurrent heating type regenerative drying drum 2 can be sent into the countercurrent heating type regenerative drying drum 4 to be further heated and warmed up; the countercurrent heating type regenerative drying drum 4 adopts a countercurrent heating mode, which can raise the preprocessed regenerated coarse aggregate from below 100℃ to about 160℃, so as to meet the use temperature requirement of the regenerated coarse aggregate;

[0077] The combustion mechanism 5 is connected with the feeding end of the countercurrent heating type regenerative drying drum 4, so as to generate high-temperature hot gas by using the combustion mechanism 5, and send the high-temperature hot gas into the countercurrent heating type regenerative drying drum 4 to further heat and warm up the regenerated coarse aggregate;

[0078] The second waste gas chamber 6 is connected with the output end of the countercurrent heating type regenerative drying drum 4, and the lower end of the second waste gas chamber 6 is connected with a regenerative material storage bin 61, which is used for temporarily storing the regenerated coarse aggregate falling down;

[0079] The output end of the incineration heat exchange mechanism 7 is connected with the discharge end of the countercurrent heating type regenerative drying drum 2, and the upper end of the second waste gas chamber 6 is connected with the input end of the combustion mechanism 5 and the incineration heat exchange mechanism 7 respectively; during operation, the regenerative coarse aggregate output by the concurrent heating type regenerative drying drum 4 falls into the regenerative material storage bin 61 for temporary storage under the action of gravity after entering the second waste gas chamber 6, and most of the regenerative tail gas output by the concurrent heating type regenerative drying drum 4 is transported into the incineration heat exchange mechanism 7 for incineration and heat exchange treatment, and the treated regenerative tail gas is sent into the countercurrent heating type regenerative drying drum 2 as a heat source for preliminary heating and drying of the regenerative coarse aggregate cold material, and a small part is transported to the combustion mechanism 5 for recycling; because the temperature in the concurrent heating type regenerative drying drum 4 is high, the asphalt on the surface of the regenerative coarse aggregate is melted, so that the regenerative tail gas output by the concurrent heating type regenerative drying drum 4 contains asphalt fume, and the most of the regenerative tail gas output by the concurrent heating type regenerative drying drum 4 is sent into the incineration heat exchange mechanism 7 for incineration and heat exchange treatment, and the treated regenerative tail gas is transported to the countercurrent heating type regenerative drying drum 2 for continuous use, and a small part of the regenerative tail gas is transported to the combustion mechanism 5 for recycling, which not only can effectively remove the asphalt fume in the regenerative tail gas, ensure that the discharged gas meets the emission standard, and the regenerative bag dust collector 31 is not polluted by the asphalt fume, so that the service life of the regenerative bag dust collector 31 can be improved, but also the high-temperature regenerative tail gas after incineration treatment is utilized, so that the overall energy consumption of the equipment can be reduced.

[0080] The raw material supply mechanism 8 is connected with a raw material bag dust collector 81 to filter the raw tail gas generated by the raw material supply mechanism 8, so that the discharged gas meets the emission standard.

[0081] The mixing and stirring cylinder 9 is connected with the raw material supply mechanism 8 and the regenerative material storage bin 61 to mix and stir the mixed material in the mixing and stirring cylinder 9.

[0082] In some embodiments of the present application, the discharge end of the countercurrent heating type regenerative drying drum 2 is provided with a discharge box 21, a screen structure 22 is arranged at one end of the discharge box 21 close to the countercurrent heating type regenerative drying drum 2, and a regenerative material conveying device 23 is arranged at the bottom of the discharge box 21 corresponding to the screen structure 22 and connected with the regenerative material storage bin 61, so that the regenerative fine aggregate screened out by the screen structure 22 is directly transported to the regenerative material storage bin 61 for temporary storage by the regenerative material conveying device 23.

[0083] The bottom of the discharge box 21 away from the end of the countercurrent heating type regeneration drying drum 2 is connected with the feeding end of the cocurrent heating type regeneration drying drum 4 through a feeding box 24, so as to realize the feeding of the screened regenerated coarse aggregate into the cocurrent heating type regeneration drying drum 4; and the output end of the incineration heat exchange mechanism 7 is connected with the end of the discharge box 21 away from the countercurrent heating type regeneration drying drum 2.

[0084] By adopting the above technical scheme of the present application, at least the following beneficial effects are achieved:

[0085] 1. The energy-saving plant-mixing heat regeneration combined device 100 comprises the countercurrent heating type regeneration drying drum 2 and the cocurrent heating type regeneration drying drum 4, most of the regenerated tail gas output by the cocurrent heating type regeneration drying drum 4 is sent into the incineration heat exchange mechanism 7 for incineration and heat exchange treatment, the regenerated tail gas after the incineration treatment is delivered to the countercurrent heating type regeneration drying drum 2 for the preliminary heating and drying of the regenerated coarse aggregate cold material, and a small part of the regenerated tail gas is delivered to the combustion mechanism 5 for recycling, which not only can effectively remove the asphalt smoke in the regenerated tail gas, ensure that the discharged gas meets the discharge qualified standard, and the regenerated bag-type dust collector 31 is not polluted by the asphalt smoke, so that the service life of the regenerated bag-type dust collector 31 can be prolonged, but also can utilize the high-temperature regenerated tail gas after the incineration treatment, so that the overall energy consumption of the device can be reduced, and the energy-saving purpose can be achieved.

[0086] 2. The regenerated and the virgin are independently matched with the bag-type dust collectors, that is, the upper end of the first waste gas chamber 3 is connected with the regenerated bag-type dust collector 31, and the virgin material supply mechanism 8 is connected with the virgin bag-type dust collector 81, so that the regenerated and the virgin can be independently treated with the tail gas, and the two do not interfere with each other, which is not only beneficial to realize the large proportion of the regenerated material addition, but also can solve the problem that the virgin device must be started at the same time when the regeneration device is started in the prior art.

[0087] 3. The discharge box 21 is arranged at the discharge end of the countercurrent heating type regeneration drying drum 2, the discharge box 21 is provided with a screen structure 22 at the end close to the countercurrent heating type regeneration drying drum 2, and the bottom position of the discharge box 21 corresponding to the screen structure 22 is connected with the regenerated material storage bin 61 through the regenerated material conveying device 23, so that the screened regenerated fine aggregate can be directly conveyed to the regenerated material storage bin 61 during work, thereby effectively avoiding the surface aging of the regenerated fine aggregate due to the excessively high temperature, and effectively solving the problem of the reduction of the use performance caused by the adhesion of the asphalt to the cylinder wall of the regeneration drying drum.

[0088] In some embodiments of the present application, please refer to Figure 2 As shown in the figure, the incineration heat exchange mechanism 7 comprises:

[0089] A burning furnace 71 for burning the regeneration tail gas carrying asphalt fume output by the concurrent heating type regeneration drying drum 4 to remove the asphalt fume;

[0090] A first burner 72, the output end of which is connected with the input end of the burning furnace 71, the first burner 72 is a device for mixing and burning fuel and air in a certain way, which belongs to the prior art, and thus will not be described in detail here;

[0091] A heat exchanger 73, which has a first input port 731, a second input port 732, a first output port 733 connected with the first input port 731, and a second output port 734 connected with the second input port 732, the first output port 733 is connected with the input end of the burning furnace 71 to realize the burning of the regeneration tail gas output by the concurrent heating type regeneration drying drum 4 into the burning furnace 71; wherein, when the first input port 731 and the first output port 733 form the shell side of the heat exchanger 73, the second input port 732 and the second input port 732 form the tube side of the heat exchanger 73, and vice versa, which can be set according to actual needs;

[0092] A vertical furnace body 74, the lower end of which is connected with the output end of the burning furnace 71, and the upper end of which is connected with the second input port 732 of the heat exchanger 73 to realize the heat exchange of the high-temperature regeneration tail gas after burning into the heat exchanger 73, and the second output port 734 of the heat exchanger 73 is connected with the discharge end of the countercurrent heating type regeneration drying drum 2 to realize the delivery of the heat-exchanged regeneration tail gas to the countercurrent heating type regeneration drying drum 2;

[0093] A secondary combustion fan 75, the output end of which is connected with the first input port 731 of the heat exchanger 73, and the upper end of the second waste gas chamber 6 is connected with the input end of the secondary combustion fan 75.

[0094] The incineration heat exchange mechanism 7 in specific work, can utilize the secondary combustion fan 75 will enter the second exhaust chamber 6 most of the regeneration tail gas through the first input port 731 into the heat exchanger 73, and then through the first output port 733 will be sent into the incinerator 71 regeneration tail gas incineration, after incineration high temperature regeneration tail gas will pass through the vertical furnace body 74, and through the second input port 732 of heat exchanger 73 into the heat exchanger 73 heat exchange, that is, the incineration of high temperature regeneration tail gas and through the first input port 731 into the regeneration tail gas heat exchange, to improve the temperature of the regeneration tail gas into the incinerator 71, while reducing the temperature of the regeneration tail gas into the countercurrent heating type regeneration drying drum 2, so as to achieve a certain energy saving effect, but also can guarantee the asphalt on the surface of the regenerated coarse aggregate in the countercurrent heating type regeneration drying drum 2 will not melt.

[0095] In some embodiments of the application, the combustion mechanism 5 comprises:

[0096] Hot blast stove 51, the output end of the hot blast stove 51 is connected with the feeding end of the countercurrent heating type regeneration drying drum 4;

[0097] Second burner 52, the second burner 52 is connected with the input end of the hot blast stove 51, the second burner 52 is a device that mixes and burns fuel and air in a certain way, which belongs to the prior art, so here will not be described in detail. The second burner 52. The present application sets up a hot blast stove 51 at the feeding end of the countercurrent heating type regeneration drying drum 4, so that the fuel and air sprayed by the second burner 52 can be better burned in the hot blast stove 51, so that the high temperature hot gas output by the hot blast stove 51 can heat the regeneration coarse aggregate in the countercurrent heating type regeneration drying drum 4 to the required temperature (i.e. about 160 DEG C).

[0098] In some embodiments of the present invention, the energy-saving plant-mixed hot regeneration combined equipment 100 further includes a cyclone dust collector 10; the upper end of the second exhaust gas chamber 6 is connected to the cyclone dust collector 10, so that the regeneration tail gas output from the co-current heating regeneration drying drum 4, after passing through the second exhaust gas chamber 6 for gravity settling filtration, will continue to enter the cyclone dust collector 10 for cyclone dust removal; the lower end of the cyclone dust collector 10 is connected to the recycled material storage bin 61, so as to realize the conveying of the fine material obtained by the cyclone dust collector 10 to the recycled material storage bin 61. A recycled material weighing scale 62 is installed below the storage bin 61 to weigh the recycled material before sending it into the mixing tank 9. The upper end of the cyclone dust collector 10 is connected to the incineration heat exchange mechanism 7 through a first flue pipe 101. The combustion mechanism 5 is connected to the first flue pipe 101 through a second flue pipe 102. A return air fan 103 is installed on the second flue pipe 102 to transport a small portion of the recycled exhaust gas output from the co-current heating recycled drying drum 4 to the combustion mechanism 5 for continued recycling.

[0099] In some embodiments of the present invention, please refer to the following: Figure 4 As shown, the raw material supply mechanism 8 includes:

[0100] The counter-current heating type primary drying drum 82 is connected to the primary bag dust collector 81 through a third smoke pipe 821 at its feed end, so that the primary exhaust gas generated by the counter-current heating type primary drying drum 82 can be transported to the primary bag dust collector 81 through the third smoke pipe 821 for bag dust removal.

[0101] The third burner 83 is connected to the discharge end of the counter-current heating primary drying drum 82. The third burner 83 is a general term for a device that sprays fuel and air out in a certain way for mixed combustion. It belongs to the prior art, so the third burner 83 will not be described in detail here.

[0102] A raw material belt conveyor 84 is provided, one end of which is connected to the feed end of a counter-current heating raw material drying drum 82 to transport raw materials into the counter-current heating raw material drying drum 82. A raw material silo 85 is provided above the raw material belt conveyor 84. In a specific implementation of the present invention, multiple raw material silos 85 are provided above the raw material belt conveyor 84, and a small raw material conveyor 851 is provided at the bottom of each raw material silo 85 to transport the raw materials discharged from the raw material silo 85 to the raw material belt conveyor 84.

[0103] A raw material lifting machine 86 is connected with the discharging end of the countercurrent heating raw material drying drum 82, so that the raw material output by the countercurrent heating raw material drying drum 82 can enter the raw material lifting machine 86;

[0104] A raw hot material bin 87 is connected with the discharging end of the raw material lifting machine 86, so that the heated raw material is lifted and conveyed by the raw material lifting machine 86 to the raw hot material bin 87 for temporary storage, and a raw material metering scale 871 is arranged at the bottom of the raw hot material bin 87, so that the raw material is metered by the raw material metering scale 871 and then sent into the mixing and stirring cylinder 9.

[0105] A powder bin 88 is connected with the mixing and stirring cylinder 9 through a powder metering scale 881, so that the required powder is metered by the powder metering scale 881 and then sent into the mixing and stirring cylinder 9.

[0106] An asphalt tank 89 is connected with the mixing and stirring cylinder 9 through an asphalt metering scale 891, so that the asphalt is metered by the asphalt metering scale 891 and then sent into the mixing and stirring cylinder 9.

[0107] In some embodiments of the present application, please refer to Figure 3 As shown in the figure, the regenerated material conveying and lifting mechanism 1 comprises:

[0108] A regenerated lifting machine 11 is connected with the feeding end of the countercurrent heating regenerated material drying drum 2 at the output end, so that the regenerated coarse aggregate is lifted and conveyed by the regenerated lifting machine 11 into the countercurrent heating regenerated material drying drum 2.

[0109] A regenerated material belt conveyor 12 is connected with the feeding end of the regenerated lifting machine 11 at one end, so that the regenerated coarse aggregate is conveyed by the regenerated material belt conveyor 12 to the regenerated lifting machine 11, and a regenerated material bin 13 is arranged above the regenerated material belt conveyor 12; in the specific implementation of the present application, a plurality of regenerated material bins 13 are arranged above the regenerated material belt conveyor 12, and a small regenerated material conveyor 131 is arranged at the bottom of each regenerated material bin 13, so that the regenerated material discharged from the regenerated material bin 13 is conveyed to the regenerated material belt conveyor 12 by the small regenerated material conveyor 131.

[0110] Embodiment two

[0111] Please refer to Figures 1 to 4 As shown in the figure, the present application is an energy-saving plant-mixed hot regeneration combined equipment 100 production method, wherein the specific structure of the energy-saving plant-mixed hot regeneration combined equipment 100 and the technical effects that can be obtained are exactly the same as those of embodiment one, and specific reference can be made to the detailed introduction of embodiment one, which will not be repeated here.

[0112] The production method comprises the following steps:

[0113] The recycled coarse aggregate is transported into the countercurrent heating type recycled drying drum 2 by the recycled material conveying lifting mechanism 1, and the recycled tail gas generated by the concurrent heating type recycled drying drum 4 is incinerated and heat-exchanged by the incineration heat exchange mechanism 7, and the heat-exchanged recycled tail gas is sent into the countercurrent heating type recycled drying drum 2 to preliminarily heat and dry the recycled coarse aggregate, that is, to preliminarily dry the moisture on the surface of the recycled coarse aggregate, and the temperature of the preliminarily dried recycled coarse aggregate is lower than 100 DEG C, but the moisture on the surface of the recycled coarse aggregate can be basically dried; the recycled tail gas output by the countercurrent heating type recycled drying drum 2 is first transported into the first waste gas chamber 3 to be gravity sedimentation filtered, the coarse particles generated by the gravity sedimentation filtration are directly transported back to the recycled material conveying lifting mechanism 1 for continuous use, and the filtered recycled tail gas is further transported into the recycled bag dust collector 31 for bag dust collection, so as to ensure that the discharged gas meets the discharge qualified standard;

[0114] The preliminarily heated and dried recycled coarse aggregate is sent into the concurrent heating type recycled drying drum 4, high-temperature hot gas generated by the combustion mechanism 5 is transported into the concurrent heating type recycled drying drum 4 to further heat and raise the temperature of the recycled coarse aggregate, so as to raise the temperature of the recycled coarse aggregate to the required temperature, that is, to raise the temperature of the preliminarily dried recycled coarse aggregate from lower than 100 DEG C to about 160 DEG C, the further heated and raised recycled coarse aggregate is stored in the recycled material storage bin 61, so as to temporarily store the heated and treated recycled material by the recycled material storage bin 61; the recycled tail gas generated by the concurrent heating type recycled drying drum 4 is transported into the second waste gas chamber 6 to be gravity sedimentation filtered, a part of the filtered recycled tail gas is transported to the incineration heat exchange mechanism 7 to be incinerated and heat-exchanged by the incineration heat exchange mechanism 7, and another part of the recycled tail gas is transported to the combustion mechanism 5; in the specific implementation of the present application, the recycled tail gas after the gravity sedimentation filtration can also be transported to the cyclone dust collector 10 to be cyclone dust collected, most of the treated recycled tail gas is transported to the incineration heat exchange mechanism 7 to be incinerated and heat-exchanged, and a small part of the recycled tail gas is transported to the combustion mechanism 5 for recycling, and at the same time, the fine material generated after the cyclone dust collection can be directly transported into the recycled material storage bin 61;

[0115] According to the required proportion of the recycled material, the raw material, the powder and the asphalt, the weighed recycled material, raw material, powder and asphalt are transported into the mixing and stirring cylinder 9 to be mixed and stirred.

[0116] In some embodiments of the present application, the step of feeding the preliminarily heated and dried recycled coarse aggregate into the downstream heating type recycled drying drum 4 specifically comprises: screening the preliminarily heated and dried recycled coarse aggregate by using the screen structure 22, directly feeding the screened recycled fine aggregate into the recycled material storage bin 61 by using the recycled material conveying device 23, and feeding the remaining recycled coarse aggregate into the downstream heating type recycled drying drum 4, so as to avoid the surface aging of the recycled fine aggregate due to the excessively high temperature, and effectively solve the problem of the reduced performance caused by the adhesion of the asphalt to the recycled drying drum wall.

[0117] In some embodiments of the present application, the production method comprises the following steps:

[0118] The raw material is conveyed into the countercurrent heating type raw drying drum 82, and the third burner 83 is used to generate hot gas and convey the hot gas into the countercurrent heating type raw drying drum 82 to dry and heat the raw material, so as to increase the temperature of the raw material to the required temperature; the dried and heated raw material is conveyed into the raw material storage bin 87 by using the raw material elevator 86 for temporary storage, and the raw tail gas generated by the countercurrent heating type raw drying drum 82 is conveyed into the raw bag-type dust collector 81 for bag-type dust collection, so as to ensure that the discharged gas meets the discharge qualified standard.

[0119] Although the specific embodiments of the present application are described above, it should be understood by those skilled in the art 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 energy-efficient plant-mixed hot recycling combination apparatus, characterized by, The application relates to a recycling system for recycling waste materials, which comprises the following components: a recycled material conveying and lifting mechanism; a countercurrent heating type recycled drying roller connected with the feeding end of the countercurrent heating type recycled drying roller; a first waste gas chamber, the middle part of which is connected with the feeding end of the countercurrent heating type recycled drying roller, the lower end of the first waste gas chamber is connected with the recycled material conveying and lifting mechanism, and the upper end of the first waste gas chamber is connected with a recycled cloth bag dust collector; a cocurrent heating type recycled drying roller connected with the discharging end of the countercurrent heating type recycled drying roller; a combustion mechanism connected with the feeding end of the cocurrent heating type recycled drying roller; a second waste gas chamber connected with the discharging end of the cocurrent heating type recycled drying roller, and the lower end of the second waste gas chamber is connected with a recycled material storage bin; an incineration heat exchange mechanism, the output end of which is connected with the discharging end of the countercurrent heating type recycled drying roller, and the upper end of the second waste gas chamber is respectively connected with the input end of the combustion mechanism and the incineration heat exchange mechanism; a raw material supply mechanism connected with a raw cloth bag dust collector; a mixing and stirring cylinder, which is connected with the raw material supply mechanism and the recycled material storage bin to convey the mixed material.

2. An energy efficient plant-mixed hot recycling combination apparatus according to claim 1, characterized in that: The discharging end of the countercurrent heating type recycled drying roller is provided with a discharging box, a screen structure is arranged in the discharging box close to one end of the countercurrent heating type recycled drying roller, and a recycled material conveying device is arranged at the bottom of the discharging box corresponding to the screen structure and connected with the recycled material storage bin; the bottom of the other end of the discharging box is connected with the feeding end of the cocurrent heating type recycled drying roller through a feeding box, and the output end of the incineration heat exchange mechanism is connected with the other end of the discharging box.

3. An energy efficient plant-mixed hot recycling combination apparatus according to claim 1, characterized in that: The incineration heat exchange mechanism comprises: an incinerator; a first burner, the output end of which is connected with the input end of the incinerator; 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, and the first output port is connected with the input end of the incinerator; a vertical furnace body, the lower end of which is connected with the output end of the incinerator, the upper end of the vertical furnace body is connected with the second input port of the heat exchanger, and the second output port of the heat exchanger is connected with the discharging end of the countercurrent heating type recycled drying roller; a secondary combustion fan, the output end of which is connected with the first input port of the heat exchanger, and the upper end of the second waste gas chamber is connected with the input end of the secondary combustion fan.

4. The energy efficient plant-mixed hot recycling combination apparatus according to claim 1, characterized in that: The combustion mechanism comprises: a hot blast furnace, the output end of which is connected with the feeding end of the cocurrent heating type recycled drying roller; a second burner, which is connected with the input end of the hot blast furnace.

5. An energy efficient plant-mixed hot recycling combination apparatus as claimed in claim 1, wherein: It also includes a cyclone dust collector; the upper end of the second exhaust chamber is connected to the cyclone dust collector, the lower end of the cyclone dust collector is connected to the recycled material storage bin, and a recycled material weighing scale is installed below the recycled material storage bin; the upper end of the cyclone dust collector is connected to the combustion heat exchange mechanism through a first flue, the combustion mechanism is connected to the first flue through a second flue, and a return air fan is installed on the second flue.

6. An energy efficient plant-mixed hot recycling combination apparatus as claimed in claim 1, wherein: The raw material supply mechanism includes: The counter-current heating type primary drying drum is connected to the primary bag filter dust collector through a third smoke pipe at its feed end. The third burner is connected to the discharge end of the counter-current heating primary drying drum; A raw material belt conveyor, one end of which is connected to the feed end of a counter-current heating raw material drying drum, and a raw material silo is provided above the raw material belt conveyor; A raw material elevator, which is connected to the discharge end of a counter-current heating raw material drying drum; A raw material hot silo is connected to the discharge end of a raw material elevator, and a raw material weighing scale is installed at the bottom of the raw material hot silo. The powder silo is connected to the mixing tank via a powder weighing scale. An asphalt tank is connected to a mixing tank via an asphalt weighing scale.

7. An energy efficient plant-mixed thermal regeneration combination apparatus as claimed in claim 1, wherein: The recycled material conveying and lifting mechanism includes: A regeneration elevator, the output end of which is connected to the feed end of a counter-current heating regeneration drying drum; A recycled material belt conveyor, one end of which is connected to the feed end of a recycling elevator, and a recycled material hopper is provided above the recycled material belt conveyor.

8. A production method based on the energy-saving plant-mixed hot recycling combined equipment according to any one of claims 1-7, characterized in that: The production method includes the following steps: The recycled coarse aggregate is conveyed to the counter-current heating recycling dry drum by the recycled material conveying and lifting mechanism. At the same time, the recycling exhaust gas generated by the co-current heating recycling dry drum is incinerated and heat exchanged by the incineration heat exchange mechanism. The heat-exchanged recycling exhaust gas is sent into the counter-current heating recycling dry drum to preliminarily heat and dry the recycled coarse aggregate. The recycling exhaust gas output from the counter-current heating recycling dry drum is first sent to the first exhaust gas chamber for gravity settling and filtration. Then, the filtered recycling exhaust gas is sent to the recycling bag dust collector for bag dust removal. The pre-heated and dried recycled coarse aggregate is fed into a co-current heating recycled drying drum. At the same time, a combustion mechanism generates high-temperature hot air, which is then transported into the co-current heating recycled drying drum to further heat the recycled coarse aggregate to the required temperature. The further heated recycled coarse aggregate is then stored in a recycled material storage bin. The recycled exhaust gas generated by the co-current heating recycled drying drum is transported to a second exhaust gas chamber for gravity settling and filtration. A portion of the filtered recycled exhaust gas is then transported to an incineration heat exchange mechanism, while the other portion is transported to a combustion mechanism. Based on the required proportions of recycled material, virgin material, powder, and asphalt, the weighed recycled material, virgin material, powder, and asphalt are transported to a mixing tank for mixing.

9. The production method of an energy-saving plant-mixed hot recycling combined device according to claim 8, characterized in that: The recycled coarse aggregate after the preliminary drying and heating is sent into the downstream heating type recycled drying roller, which specifically includes: screening the recycled coarse aggregate after the preliminary drying and heating by using a screen structure, directly conveying the screened recycled fine aggregate to a recycled material storage bin through a recycled material conveying device, and sending the recycled coarse aggregate remaining after the screening into the downstream heating type recycled drying roller.

10. The production method of an energy-saving plant-mixed hot recycling combined device according to claim 8, characterized in that: The production method comprises the following steps: The raw material is conveyed into the countercurrent heating type raw drying roller, and the third burner is used to generate hot gas and convey the hot gas into the countercurrent heating type raw drying roller to dry and heat the raw material, so that the temperature of the raw material is increased to a required temperature; the raw material after the drying and heating is conveyed into a raw hot material bin through a raw material elevator for storage, and raw tail gas generated by the countercurrent heating type raw drying roller is conveyed into a raw bag-type dust collector for bag-type dust removal.

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