Intelligent exhaust device and method for thermal regeneration combined equipment

Abstract

The invention relates to the technical field of asphalt mixture thermal regeneration, and provides an intelligent exhaust device and method for thermal regeneration combined equipment, and the intelligent exhaust device comprises a regeneration bag-type dust collector, a primary bag-type dust collector, a primary induced draft fan, a regeneration induced draft fan, a heat exchange water filter and a mixing box body; the output end of the regeneration bag-type dust collector is communicated with a shell pass inlet of the heat exchange water filter through a regeneration induced draft fan, and a shell pass outlet of the heat exchange water filter is communicated with the mixing box body; the output end of the native bag-type dust collector is communicated with the mixing box body through a native induced draft fan, a tube pass outlet of the heat exchange water filter is communicated with the input end of the native induced draft fan, and a tube pass inlet of the heat exchange water filter is communicated with external air. The device has the advantages that the concentration value of the discharged asphalt smoke can be ensured to be lower than a standard value, and the cost and the energy waste can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt mixture thermal regeneration, and in particular to an intelligent exhaust device and method for thermal regeneration combined equipment. Background Art

[0002] Asphalt mixture hot regeneration technology is a technology that recycles and reuses asphalt mixture. It is one of the most widely used technologies in the current regeneration technology. The heating methods in the hot regeneration technology are divided into countercurrent heating and downstream heating. The treatment methods of the regeneration exhaust gas generated by the two heating methods are also different. The exhaust gas temperature generated by downstream heating is relatively high. The usual treatment method of this exhaust gas is that the exhaust gas is sent to the original drying drum through the induced draft fan for secondary combustion of the asphalt smoke in the regeneration exhaust gas, and then mixed with the exhaust gas generated by the original equipment and filtered out the dust particles in the exhaust gas through the original bag filter before being discharged into the atmosphere; However, this method has the problem that the total amount of regeneration gas allowed to be sent to the secondary combustion is limited by factors such as the original drum and pipelines, and can often only treat a small part of the regeneration exhaust gas or only a small amount of regeneration exhaust gas, which affects the output of the regeneration equipment and limits the addition ratio of recycled materials.

[0003] The exhaust gas temperature generated by countercurrent heating is relatively low. The usual method of treating the exhaust gas is to first spray a certain amount of powder particles into the regeneration smoke pipe to wrap the asphalt flue gas in the regeneration exhaust gas, and then directly send it to the bag filter to filter out the dust particles in the exhaust gas and then discharge it from the equipment. This method does not have the problem of limited production capacity introduced by the original drum secondary combustion, but the asphalt flue gas in the regeneration exhaust gas cannot be completely treated by the powder-wrapped smoke method. Once the powder amount of the powder-wrapped smoke is improperly controlled, it is easy to cause the asphalt flue gas concentration value in the exhaust gas discharged from the equipment to exceed the standard; therefore, it is usually necessary to pass the exhaust gas discharged from the equipment through the regeneration exhaust gas incinerator to burn the asphalt flue gas in the regeneration exhaust gas before discharging it into the atmosphere. The problem with this method is that the equipment investment is large, the use cost is high, and the exhaust gas emission temperature generated after being treated by the incinerator is high, resulting in a certain amount of energy waste. Therefore, it is urgent to provide an intelligent exhaust device and method that can control the emission concentration of the regeneration exhaust gas to be lower than the standard value, and can reduce costs and reduce energy waste. Summary of the invention

[0004] In view of the above-mentioned technical problems, the object of the present invention is to provide an intelligent exhaust device and method for a thermal regeneration combination equipment, which can not only control the regeneration exhaust emission concentration to be lower than the standard value, but also reduce costs and energy waste.

[0005] The present invention is achieved in that: In a first aspect, an intelligent exhaust device for a heat regeneration combined device includes a regeneration bag filter, a primary bag filter, a primary induced draft fan, a regeneration induced draft fan, a heat exchange water filter, and a mixing box; The output end of the regenerated bag dust collector is connected to the shell side inlet of the heat exchange water filter through the regenerated induced draft fan, and the shell side outlet of the heat exchange water filter is connected to the mixing box; the output end of the native bag dust collector is connected to the mixing box through the native induced draft fan, the tube side outlet of the heat exchange water filter is connected to the input end of the native induced draft fan, and the tube side inlet of the heat exchange water filter is connected to the external air.

[0006] Furthermore, it also includes a bitumen smoke detector; the top of the mixing box is provided with an exhaust gas outlet, and the bitumen smoke detector is arranged on the exhaust gas outlet.

[0007] Furthermore, it also includes an electric regulating damper; the pipe outlet of the heat exchange water filter is connected to the input end of the primary induced draft fan through a first connecting pipe, and the electric regulating damper is arranged on the first connecting pipe.

[0008] Furthermore, it also includes a countercurrent regenerative drying drum, a return air fan, a hot air furnace and a second connecting pipe; the feed end of the countercurrent regenerative drying drum is provided with a first exhaust gas chamber, and the discharge end of the countercurrent regenerative drying drum is provided with a first discharge box; The output end of the regenerative bag filter is also connected to the hot air furnace through a return air fan, the hot air furnace is connected to the first discharge box, and the first exhaust chamber is connected to the input end of the regenerative bag filter through a second connecting pipe.

[0009] Furthermore, it also includes a powder spraying device and a powder bin; the input end of the powder spraying device is connected to the bottom of the powder bin, and the output end of the powder spraying device is connected to the second connecting pipe.

[0010] Furthermore, the mixing box is divided into a first space and a second space by a guide blade group, the primary induced draft fan and the regeneration induced draft fan are both connected to the first space, and the exhaust gas outlet is connected to the second space.

[0011] Furthermore, the lower end of the heat exchange water filter is provided with a first drain outlet connected to the shell side of the heat exchange water filter; the lower end of the mixing box is a funnel-shaped structure, and a second drain outlet is provided in the middle of the bottom of the mixing box.

[0012] Furthermore, it also includes a countercurrent primary drying drum and a third connecting pipe; the feed end of the countercurrent primary drying drum is provided with a second exhaust chamber, and the discharge end of the countercurrent primary drying drum is provided with a second discharge box; the second exhaust chamber is connected to the primary induced draft fan through the third connecting pipe.

[0013] In a second aspect, an exhaust method of an intelligent exhaust device of a heat regeneration combined equipment is provided, the method comprising the following steps: The regeneration exhaust gas filtered by the regeneration bag dust collector is transported to the shell side of the heat exchange water filter by the regeneration induced draft fan, and the original exhaust gas filtered by the original bag dust collector is transported to the mixing box by the original induced draft fan; at the same time, the external air is drawn into the tube side of the heat exchange water filter by the original induced draft fan and heat is exchanged with the regeneration exhaust gas in the shell side of the heat exchange water filter, so that condensed water and asphalt liquid are precipitated from the regeneration exhaust gas; the external air after heat exchange is transported to the mixing box together with the original exhaust gas, and the regeneration exhaust gas after heat exchange is transported to the mixing box, so that the external air, original exhaust gas and regeneration exhaust gas are mixed and diluted in the mixing box and then discharged.

[0014] Furthermore, the method further comprises the following steps: A return air fan is used to transport a portion of the regenerated tail gas output by the regeneration bag filter back to the hot air furnace of the countercurrent regeneration drying drum for secondary combustion; The asphalt smoke measuring instrument is used to detect the asphalt smoke concentration value of the mixed exhaust gas discharged from the mixing box in real time, and the speed of the primary induced draft fan and the size of the electric regulating damper are automatically adjusted according to the detected asphalt smoke concentration value.

[0015] By adopting the above technical solution of the present invention, it is possible to effectively ensure that the concentration of asphalt smoke discharged is lower than the standard value, and to reduce costs and energy waste: 1. A part of the regenerated exhaust gas after dust removal and filtration by the regeneration bag filter is drawn into the shell side of the heat exchange water filter through the regeneration induced draft fan for heat exchange. The condensed water and asphalt liquid in the regenerated exhaust gas can be precipitated by heat exchange in the shell side of the heat exchange water filter, so that only a small amount of asphalt flue gas remains in the regenerated exhaust gas entering the mixing box, which helps to reduce the concentration of the discharged asphalt flue gas. At the same time, the heat energy of the regenerated exhaust gas is directly used for heat exchange, which can reduce energy waste.

[0016] 2. The regenerated exhaust gas after heat exchange, external fresh air and the original exhaust gas after dust removal and filtration are transported together into the mixing box for mixing, which can fully dilute the asphalt fume in the regenerated exhaust gas, thereby effectively reducing the asphalt fume concentration in the mixed exhaust gas.

[0017] 3. An asphalt smoke meter is set at the exhaust gas outlet of the mixing box, and an electric regulating damper is set at the first connecting pipe between the pipe outlet of the heat exchange water filter and the input end of the primary induced draft fan; so that in the specific working process, the rotation speed of the primary induced draft fan and the size of the electric regulating damper can be intelligently controlled and adjusted according to the asphalt smoke concentration value detected by the asphalt smoke meter. When the asphalt smoke concentration value detected by the asphalt smoke meter is greater than the set value, the rotation speed of the primary induced draft fan can be automatically controlled to increase and the electric regulating damper can be adjusted to increase the air supply. This can not only further reduce the temperature of the regenerated exhaust gas, increase the condensation effect of the heat exchange water filter on the regenerated exhaust gas, and reduce the residual asphalt smoke entering the mixing box; it can also increase the amount of external fresh air entering the mixing box and reduce the proportion of residual asphalt smoke per unit volume, so as to achieve the purpose of effectively reducing the asphalt smoke concentration value in the mixed exhaust gas and ensure that the discharged asphalt smoke concentration value is lower than the standard value. In addition, the primary induced draft fan can provide power for drawing in external fresh air, as well as for drawing in primary exhaust gas, which can effectively improve the utilization rate of the primary induced draft fan and reduce its use cost.

[0018] 4. The other part of the regenerated exhaust gas filtered by the regenerated bag dust collector is sucked into the hot air furnace through the return air fan for secondary combustion to burn the asphalt fume in this part of the regenerated exhaust gas. This can reduce the amount of regenerated exhaust gas entering the heat exchange water filter, and further effectively reduce the amount of asphalt fume remaining in the regenerated exhaust gas in the mixing box; at the same time, the regenerated exhaust gas entering the hot air furnace can also cool the hot air furnace to avoid excessive temperature in the hot air furnace.

[0019] 5. The mixing box is divided into a first space and a second space by utilizing a guide blade group, and both the original induced draft fan and the regeneration induced draft fan are connected to the first space, and the exhaust gas outlet is connected to the second space. In this way, the guide blade group can be utilized to disturb the regenerated exhaust gas, external fresh air and original exhaust gas entering the mixing box, while increasing the residence time of the regenerated exhaust gas, external fresh air and original exhaust gas in the mixing box, thereby improving the mixing rate and mixing effect of the regenerated exhaust gas, external fresh air and original exhaust gas; in addition, the guide blade group can also block the condensed water and asphalt liquid remaining in the regenerated exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0021] Figure 1 This is a structural diagram of the whole machine of an intelligent exhaust device of a heat regeneration combined equipment of the present invention; Figure 2It is an assembly structure diagram of the regenerated bag dust collector, the original bag dust collector, the original induced draft fan, the regenerated induced draft fan, the heat exchange water filter, the mixing box and the countercurrent regenerated drying drum in the present invention; Figure 3 It is a connection structure diagram of the heat exchange water filter and the mixing box in the present invention; Figure 4 It is a device structure diagram of the original part in the present invention.

[0022] Description of reference numerals: Intelligent exhaust device 100; Regeneration bag filter 1; Original bag filter 2; Primary induced draft fan 3; Regeneration induced draft fan 4; Heat exchange water filter 5, first communication pipe 51, first drain port 52; Mixing box 6, exhaust outlet 61, guide blade set 62, buffer plate 621, first space 63, second space 64, second drain outlet 65; Asphalt smoke measuring instrument 71, electric regulating damper 72; Countercurrent regeneration drying drum 81, first exhaust chamber 811, first discharge box 812, return air fan 82, hot air furnace 83, second connecting pipe 84, regenerated material temporary storage bin 85, regenerated material collection bin 86, regenerated material belt conveyor 87, regenerated material elevator 88, regenerated material chute 881; Powder spraying device 91, powder bin 92, counter-current raw drying drum 93, second exhaust chamber 931, second discharge box 932, third connecting pipe 94; Raw material bin 101, raw material belt conveyor 102, raw material elevator 103, raw hot material bin 104, raw aggregate scale 105, recycled aggregate scale 106, mixing tank 107, asphalt tank 108, asphalt scale 1081, mineral powder bin 109, mineral powder scale 1091. DETAILED DESCRIPTION

[0023] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] It should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing these embodiments and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. In addition, the terms "first", "second", etc., etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. Embodiment 1

[0025] See also Figures 1 to 4 As shown, the present invention is an intelligent exhaust device 100 of a heat regeneration combination device, and the intelligent exhaust device 100 includes a regeneration bag dust collector 1, a native bag dust collector 2, a native induced draft fan 3, a regeneration induced draft fan 4, a heat exchange water filter 5 and a mixing box 6; wherein the regeneration bag dust collector 1 is used for dust removal and filtering of the regeneration exhaust gas, the native bag dust collector 2 is used for dust removal and filtering of the native exhaust gas, the native induced draft fan 3 is used for sucking the native exhaust gas filtered by the native bag dust collector 2 into the mixing box 6, the regeneration induced draft fan 4 is used for sucking the regeneration exhaust gas filtered by the regeneration bag dust collector 1 into the heat exchange water filter 5 for heat exchange, the heat exchange water filter 5 is used for heat exchange between the regeneration exhaust gas and the outside air, and the mixing box 6 is used for mixing the regeneration exhaust gas, the native exhaust gas and the outside air and then discharging them.

[0026] The output end of the regenerated bag dust collector 1 is connected with the shell side inlet of the heat exchange water filter 5 through the regeneration induced draft fan 4, so that the regenerated exhaust gas filtered by the regeneration bag dust collector 1 is drawn into the shell side of the heat exchange water filter 5 by means of the regeneration induced draft fan 4, and the shell side outlet of the heat exchange water filter 5 is connected with the mixing box 6, so that the regenerated exhaust gas after heat exchange is input into the mixing box 6; the output end of the native bag dust collector 2 is connected with the mixing box 6 through the native induced draft fan 3, the tube side outlet of the heat exchange water filter 5 is connected with the input end of the native induced draft fan 3, and the tube side inlet of the heat exchange water filter 5 is connected with the external air, so that the native induced draft fan 3 can not only draw the native exhaust gas filtered by the native bag dust collector 2 into the mixing box 6, but also draw the external fresh air into the tube side of the heat exchange water filter 5 for heat exchange, and at the same time, the external fresh air after heat exchange can enter the mixing box 6 together with the native exhaust gas.

[0027] In some embodiments of the present invention, the intelligent exhaust device 100 further includes an asphalt smoke detector 71; the top of the mixing box 6 is provided with an exhaust outlet 61, and the asphalt smoke detector 71 is arranged on the exhaust outlet 61. When the intelligent exhaust device is working, the asphalt smoke detector 71 can be used to perform real-time detection of the asphalt smoke concentration value in the mixed exhaust gas discharged from the mixing box 6, so that corresponding measures can be taken when the asphalt smoke concentration value exceeds the standard, thereby ensuring that the discharged asphalt smoke concentration value is lower than the specified standard value.

[0028] In some embodiments of the present invention, the intelligent exhaust device 100 also includes an electric adjustable damper 72; the pipe outlet of the heat exchange water filter 5 is connected to the input end of the primary induced draft fan 3 through a first connecting pipe 51, and the electric adjustable damper 72 is arranged on the first connecting pipe 51. During operation, the electric adjustable damper 72 can be used to adjust the amount of air input into the mixing box 6.

[0029] In some embodiments of the present invention, the intelligent exhaust device 100 further includes a countercurrent regenerative drying drum 81, a return air fan 82, a hot air furnace 83, and a second connecting pipe 84; a first exhaust chamber 811 is provided at the feeding end of the countercurrent regenerative drying drum 81, and a first discharge box 812 is provided at the discharge end of the countercurrent regenerative drying drum 81; The output end of the regenerative bag-type dust collector 1 is also connected to the hot air furnace 83 through the return air fan 82, so that a part of the regenerated exhaust gas filtered by the regenerative bag-type dust collector 1 can be sucked into the hot air furnace 83 for secondary combustion by the return air fan 82. The hot air furnace 83 is connected to the first discharge box 812, and the first exhaust chamber 811 is connected to the input end of the regenerative bag-type dust collector 1 through the second connecting pipe 84, so that the regenerated exhaust gas generated by the countercurrent regenerative drying drum 81 during operation can be transported to the regenerative bag-type dust collector 1 through the second connecting pipe 84 for dust removal and filtration.

[0030] In the specific implementation of the present invention, the intelligent exhaust device 100 also includes a recycled material collection bin 86, a recycled material belt conveyor 87, a recycled material elevator 88 and a recycled material temporary storage bin 85; a plurality of recycled material collection bins 86 are arranged above the recycled material belt conveyor 87, the output end of the recycled material belt conveyor 87 is connected to the input end of the recycled material elevator 88, and the output end of the recycled material elevator 88 is connected to the feed end of the countercurrent regeneration drying drum 81 through a recycled material chute 881; the recycled material temporary storage bin 85 is connected to the first discharge box 812. In the specific operation of the present invention, the stored recycled material is conveyed to the recycled material belt conveyor 87 through the recycled material collection bin 86, and the recycled material belt conveyor 87 conveys the recycled material to the recycled material elevator 88, and the recycled material elevator 88 lifts the recycled material and conveys it to the countercurrent regeneration drying drum 81 for heating and drying, and the heated and dried recycled material is conveyed to the recycled material temporary storage bin 85 for temporary storage.

[0031] By adopting the above technical solution of the present invention, it is possible to effectively ensure that the concentration of the discharged asphalt smoke is lower than the standard value, and to reduce costs and energy waste, which specifically includes: 1. A part of the regenerated exhaust gas after dust removal and filtration in the regeneration bag filter 1 is drawn into the shell side of the heat exchange water filter 5 through the regeneration induced draft fan 4 for heat exchange. The condensed water and asphalt liquid in the regenerated exhaust gas can be precipitated by heat exchange in the shell side of the heat exchange water filter 5, so that only a small amount of asphalt fume remains in the regenerated exhaust gas entering the mixing box 6, which helps to reduce the concentration of the discharged asphalt fume. At the same time, the heat energy of the regenerated exhaust gas is directly used for heat exchange, which can reduce energy waste.

[0032] 2. The regenerated tail gas after heat exchange, external fresh air and the original tail gas after dust removal and filtration are transported together into the mixing box 6 for mixing, which can fully dilute the asphalt fume in the regenerated tail gas, thereby effectively reducing the asphalt fume concentration value in the mixed tail gas.

[0033] 3. An asphalt smoke meter 71 is set at the exhaust gas outlet 61 of the mixing box 6, and an electric regulating damper 72 is set at the first connecting pipe 51 between the pipe outlet of the heat exchange water filter 5 and the input end of the primary induced draft fan 3; so that in the specific working process, the rotation speed of the primary induced draft fan 3 and the size of the electric regulating damper 72 can be intelligently controlled and adjusted according to the asphalt smoke concentration value detected by the asphalt smoke meter 71. When the asphalt smoke concentration value detected by the asphalt smoke meter 71 is greater than the set value, the rotation speed of the primary induced draft fan 3 can be automatically controlled to increase and the electric regulating damper 72 can be increased to increase the air supply. This can not only further reduce the temperature of the regenerated exhaust gas, increase the condensation effect of the heat exchange water filter 5 on the regenerated exhaust gas, and reduce the residual asphalt smoke entering the mixing box 6; it can also increase the amount of external fresh air entering the mixing box 6 and reduce the proportion of residual asphalt smoke in unit volume, so as to achieve the purpose of effectively reducing the asphalt smoke concentration value in the mixed exhaust gas and ensure that the discharged asphalt smoke concentration value is lower than the standard value. In addition, the primary induced draft fan 3 can provide power for sucking external fresh air, and can also provide power for sucking primary exhaust gas, which can effectively improve the utilization rate of the primary induced draft fan 3 and reduce the cost of use.

[0034] 4. The other part of the regenerated exhaust gas filtered by the regenerated bag filter 1 is sucked into the hot air furnace 83 through the return air fan 82 for secondary combustion to burn the asphalt fume in this part of the regenerated exhaust gas. This can reduce the amount of regenerated exhaust gas entering the heat exchange water filter 5, and further effectively reduce the amount of asphalt fume remaining in the regenerated exhaust gas in the mixing box 6; at the same time, the regenerated exhaust gas entering the hot air furnace 83 can also cool the hot air furnace 83 to avoid excessive temperature in the hot air furnace 83.

[0035] In some embodiments of the present invention, the intelligent exhaust device 100 also includes a powder spraying device 91 and a powder bin 92; the input end of the powder spraying device 91 is connected to the bottom of the powder bin 92, and the output end of the powder spraying device 91 is connected to the second connecting pipe 84, so that during specific operation, the powder spraying device 91 can be used to spray powder into the second connecting pipe 84, so that the asphalt flue gas in the regenerated exhaust gas is wrapped with powder particles, and then the regenerated bag dust collector 1 is used to filter out the dust particles wrapped with the asphalt flue gas.

[0036] In order to effectively reduce the final asphalt fume concentration value, the present invention specifically adopts the following measures: the first aspect is to use a powder spraying device 91 to spray powder on the regenerated tail gas output by the countercurrent regeneration drying drum 81; the second aspect is to use a regeneration bag filter 1 to filter the dust particles wrapped with asphalt fume; the third aspect is to transport a part of the regeneration tail gas filtered and output by the regeneration bag filter 1 back to the hot air furnace 83 of the countercurrent regeneration drying drum 81 for secondary combustion; the fourth aspect is to transport another part of the regeneration tail gas filtered and output by the regeneration bag filter 1 to the heat exchange filter 5 for heat exchange, and precipitate the condensed water and asphalt liquid in the regeneration tail gas through heat exchange; the fifth aspect is to transport the regeneration tail gas after heat exchange to the mixing box 6 for mixing and diluting with the external fresh air and original tail gas involved in heat exchange. Through the combined effect of the above five aspects, it can be effectively ensured that the final asphalt fume concentration value discharged is lower than the specified standard value.

[0037] In some embodiments of the present invention, the mixing box 6 is divided into a first space 63 and a second space 64 by a guide blade group 62, the primary induced draft fan 3 and the regeneration induced draft fan 4 are both connected to the first space 63, and the exhaust gas outlet 61 is connected to the second space 64. As a specific embodiment of the present invention, the guide blade group 62 includes a plurality of buffer plates 621 arranged in a vertical direction from top to bottom in the middle of the mixing box 6, and the end of each buffer plate 621 facing the first space 63 is higher than the end facing the second space 64.

[0038] The present invention divides the mixing box 6 into a first space 63 and a second space 64 by utilizing a guide blade group 62, and connects the original induced draft fan 3 and the regeneration induced draft fan 4 to the first space 63, and connects the exhaust gas outlet 61 to the second space 64. In this way, the guide blade group 62 can be utilized to disturb the regenerated exhaust gas, external fresh air and original exhaust gas entering the mixing box 6, while increasing the residence time of the regenerated exhaust gas, external fresh air and original exhaust gas in the mixing box 6, thereby improving the mixing rate and mixing effect of the regenerated exhaust gas, external fresh air and original exhaust gas; in addition, the guide blade group 62 can also block the condensed water and asphalt liquid remaining in the regenerated exhaust gas.

[0039] In some embodiments of the present invention, the lower end of the heat exchange water filter 5 is provided with a first drain port 52 connected to the shell side of the heat exchange water filter 5, so as to use the first drain port 52 to discharge the condensed water and asphalt liquid precipitated in the shell side of the heat exchange water filter 5. The lower end of the mixing box 6 is in a funnel-shaped structure, and a second drain port 65 is provided in the middle of the bottom of the mixing box 6. In specific operation, when the regenerated exhaust gas, the external fresh air and the original exhaust gas pass through the guide blade group 62, the condensed water and asphalt liquid remaining in the regenerated exhaust gas will adhere to the guide blade group 62, and as the liquid particles continue to grow, they will eventually fall to the bottom of the mixing box 6 under the action of gravity. Therefore, the present invention designs the lower end of the mixing box 6 to be a funnel-shaped structure, and provides a second drain port 65 in the middle of the bottom of the mixing box 6, so that the condensed water and asphalt liquid falling to the bottom of the mixing box 6 can be discharged by the second drain port 65.

[0040] In some embodiments of the present invention, the intelligent exhaust device 100 also includes a countercurrent native drying drum 93 and a third connecting pipe 94; the feed end of the countercurrent native drying drum 93 is provided with a second exhaust chamber 931, and the discharge end of the countercurrent native drying drum 93 is provided with a second discharge box 932; the second exhaust chamber 931 is connected to the native induced draft fan 3 through the third connecting pipe 94, so that the native induced draft fan 3 can suck the native exhaust gas generated by the countercurrent native drying drum 93 into the mixing box 6.

[0041] In the specific implementation of the present invention, the intelligent exhaust device 100 also includes a raw material bin 101, a raw material belt conveyor 102, a raw material elevator 103, a raw hot material bin 104, a raw aggregate scale 105, a recycled aggregate scale 106, a mixing tank 107, an asphalt tank 108 and a mineral powder bin 109; wherein: A plurality of raw material bins 101 are arranged above the raw material belt conveyor 102, the output end of the raw material belt conveyor 102 is connected to the feed end of the countercurrent raw material drying drum 93, the discharge end of the countercurrent raw material drying drum 93 is connected to the input end of the raw material elevator 103, and the output end of the raw material elevator 103 is connected to the raw hot material bin 104; the raw aggregate scale 105 is arranged at the output end of the raw hot material bin 104, and the recycled aggregate scale 106 is arranged at the output end of the recycled material temporary storage bin 85; the output end of the asphalt tank 108 is equipped with an asphalt scale 1081, and the output end of the mineral powder bin 109 is equipped with a mineral powder scale 1091; the output ends of the raw aggregate scale 105, the recycled aggregate scale 106, the asphalt scale 1081 and the mineral powder scale 1091 are all connected to the mixing cylinder 107. When the present invention is in operation, the raw material is conveyed to the raw material belt conveyor 102 through the raw material bin 101, and the raw material belt conveyor 102 conveys the raw material to the countercurrent raw drying drum 93 for heating and drying. The raw material after heating and drying is lifted by the raw material elevator 103 and output to the raw hot material bin 104 for storage; when it is necessary to mix asphalt mixture, the required raw aggregate is weighed by the raw aggregate scale 105 and sent to the mixing cylinder 107, the required recycled aggregate is weighed by the recycled aggregate scale 106 and sent to the mixing cylinder 107, the required asphalt is weighed by the asphalt scale 1081 and sent to the mixing cylinder 107, the required mineral powder is weighed by the mineral powder scale 1091 and sent to the mixing cylinder 107, and the recycled aggregate, raw aggregate, asphalt and mineral powder are stirred and mixed in the mixing cylinder 107. Embodiment 2

[0042] See also Figures 1 to 4 As shown, the present invention provides an exhaust method of an intelligent exhaust device 100 of a heat regeneration combined device, wherein the specific structure and the technical effect that can be obtained by the intelligent exhaust device 100 are exactly the same as those of the first embodiment. For details, please refer to the detailed introduction of the first embodiment, which will not be repeated here; the method comprises the following steps: The regeneration exhaust gas filtered by the regeneration bag filter 1 is transported to the shell side of the heat exchange water filter 5 by the regeneration induced draft fan 4, so as to exchange heat with the regeneration exhaust gas in the heat exchange water filter 5, and the original exhaust gas filtered by the original bag filter 2 is transported to the mixing box 6 by the original induced draft fan 3; at the same time, the original induced draft fan 3 is used to draw the external air into the tube side of the heat exchange water filter 5 and exchange heat with the regeneration exhaust gas in the shell side of the heat exchange water filter 5, so that condensed water and asphalt liquid are precipitated from the regeneration exhaust gas. Since the temperature of the external air is relatively low and the temperature of the regeneration exhaust gas is relatively high, the temperature of the external air will be increased during the heat exchange process, while the temperature of the regeneration exhaust gas will be reduced, so that condensed water and asphalt liquid can be precipitated; The external air after heat exchange is transported to the mixing box 6 together with the original exhaust gas, and the regenerated exhaust gas after heat exchange is transported to the mixing box 6, so that the external air, original exhaust gas and regenerated exhaust gas are mixed and diluted in the mixing box 6 and then discharged, so as to effectively reduce the asphalt fume concentration value in the mixed exhaust gas.

[0043] In some embodiments of the present invention, the method further comprises the following steps: A part of the regenerated tail gas outputted by the regenerated bag filter 1 is transported back to the hot air furnace 83 of the countercurrent regenerated drying drum 81 by the return air fan 82 for secondary combustion, so as to remove the asphalt fume in this part of the regenerated tail gas, and at the same time reduce the amount of the regenerated tail gas entering the heat exchange water filter 5, thereby helping to further reduce the asphalt fume concentration value in the mixed tail gas; The asphalt smoke measuring instrument 71 is used to detect the asphalt smoke concentration value of the mixed exhaust gas discharged from the mixing box 6 in real time, and the rotation speed of the primary induced draft fan 3 and the size of the electric regulating damper 72 are automatically adjusted according to the detected asphalt smoke concentration value. Specifically, when the asphalt smoke concentration value detected by the asphalt smoke measuring instrument 71 is greater than the set value, the rotation speed of the primary induced draft fan 3 is automatically controlled to increase and the electric regulating damper 72 is adjusted to increase the air supply. This can not only further reduce the temperature of the regenerated exhaust gas, increase the condensation effect of the heat exchange filter 5 on the regenerated exhaust gas, and reduce the residual asphalt smoke entering the mixing box 6; it can also increase the amount of external fresh air entering the mixing box 6 and reduce the proportion of residual asphalt smoke per unit volume, thereby achieving the purpose of effectively reducing the asphalt smoke concentration value in the mixed exhaust gas and ensuring that the discharged asphalt smoke concentration value is lower than the standard value; at the same time, when the asphalt smoke concentration value detected by the asphalt smoke measuring instrument 71 is less than the set value, the rotation speed of the primary induced draft fan 3 can also be automatically controlled to appropriately reduce and the electric regulating damper 72 can be adjusted to a smaller size.

[0044] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. An intelligent exhaust device for a thermal regeneration combined device, characterized in that: Including regenerative bag dust collector, original bag dust collector, original induced draft fan, regenerative induced draft fan, heat exchange water filter and mixing box; The output end of the regenerated bag dust collector is connected to the shell side inlet of the heat exchange water filter through the regenerated induced draft fan, and the shell side outlet of the heat exchange water filter is connected to the mixing box; the output end of the native bag dust collector is connected to the mixing box through the native induced draft fan, the tube side outlet of the heat exchange water filter is connected to the input end of the native induced draft fan, and the tube side inlet of the heat exchange water filter is connected to the external air.

2. The intelligent exhaust device of the heat regeneration combined equipment according to claim 1, characterized in that: It also includes a bitumen smoke detector; a tail gas outlet is provided on the top of the mixing box, and the bitumen smoke detector is arranged on the tail gas outlet.

3. The intelligent exhaust device of the heat regeneration combined equipment according to claim 2, characterized in that: It also includes an electric regulating damper; the pipe outlet of the heat exchange water filter is connected to the input end of the primary induced draft fan through a first connecting pipe, and the electric regulating damper is arranged on the first connecting pipe.

4. An intelligent exhaust device for a thermal regeneration combined device according to any one of claims 1 to 3, characterized in that: It also includes a countercurrent regenerative drying drum, a return air fan, a hot air furnace and a second connecting pipe; the feed end of the countercurrent regenerative drying drum is provided with a first exhaust gas chamber, and the discharge end of the countercurrent regenerative drying drum is provided with a first discharge box; The output end of the regenerative bag filter is also connected to the hot air furnace through a return air fan, the hot air furnace is connected to the first discharge box, and the first exhaust chamber is connected to the input end of the regenerative bag filter through a second connecting pipe.

5. The intelligent exhaust device of the heat regeneration combined equipment according to claim 4, characterized in that: It also includes a powder spraying device and a powder bin; the input end of the powder spraying device is connected to the bottom of the powder bin, and the output end of the powder spraying device is connected to the second connecting pipe.

6. The intelligent exhaust device of the heat regeneration combined equipment according to claim 2, characterized in that: The mixing box is divided into a first space and a second space by a guide blade group, the primary induced draft fan and the regeneration induced draft fan are both connected to the first space, and the exhaust outlet is connected to the second space.

7. The intelligent exhaust device of the heat regeneration combined equipment according to claim 1, characterized in that: The lower end of the heat exchange water filter is provided with a first drain port connected to the shell side of the heat exchange water filter; the lower end of the mixing box is a funnel-shaped structure, and a second drain port is provided in the middle of the bottom of the mixing box.

8. The intelligent exhaust device of the heat regeneration combined equipment according to claim 1, characterized in that: It also includes a countercurrent primary drying drum and a third connecting pipe; the feed end of the countercurrent primary drying drum is provided with a second exhaust chamber, and the discharge end of the countercurrent primary drying drum is provided with a second discharge box; the second exhaust chamber is connected to the primary induced draft fan through the third connecting pipe.

9. An exhaust method for an intelligent exhaust device of a thermal regeneration combined equipment, characterized in that: The method comprises the following steps: The regeneration exhaust gas filtered by the regeneration bag dust collector is transported to the shell side of the heat exchange water filter by the regeneration induced draft fan, and the original exhaust gas filtered by the original bag dust collector is transported to the mixing box by the original induced draft fan; at the same time, the external air is drawn into the tube side of the heat exchange water filter by the original induced draft fan and heat is exchanged with the regeneration exhaust gas in the shell side of the heat exchange water filter, so that condensed water and asphalt liquid are precipitated from the regeneration exhaust gas; the external air after heat exchange is transported to the mixing box together with the original exhaust gas, and the regeneration exhaust gas after heat exchange is transported to the mixing box, so that the external air, original exhaust gas and regeneration exhaust gas are mixed and diluted in the mixing box and then discharged.

10. An exhaust method for an intelligent exhaust device of a heat regeneration combined equipment according to claim 9, characterized in that: The method further comprises the steps of: A return air fan is used to transport a portion of the regenerated tail gas output by the regeneration bag filter back to the hot air furnace of the countercurrent regeneration drying drum for secondary combustion; The asphalt smoke measuring instrument is used to detect the asphalt smoke concentration value of the mixed exhaust gas discharged from the mixing box in real time, and the speed of the primary induced draft fan and the size of the electric regulating damper are automatically adjusted according to the detected asphalt smoke concentration value.

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