A smoke and odor removal double-drum drying system and method

Abstract

The present invention relates to the field of drying drums, and provides a double-drum drying system and method for smoke removal and deodorization, including a primary drying drum, the discharge end of which is provided with a discharge port and a regenerated asphalt smoke inlet; a first burner, the first burner is arranged at the discharge end of the primary drying drum; a secondary combustion settling drum, the discharge end of the secondary combustion settling drum is connected to the feed end of the primary drying drum through a chute, and the feed end of the primary drying drum is connected to the discharge end of the secondary combustion settling drum through a first flue; the feed end of the secondary combustion settling drum is provided with a sand and gravel feed port; a second burner, the second burner is arranged at the discharge end of the secondary combustion settling drum; a bag dust collector, the feed end of the secondary combustion settling drum is connected to the bag dust collector through a second flue. The advantages of the present invention are: it can well realize smoke removal and deodorization of regenerated tail gas, ensure that the discharged tail gas meets environmental protection requirements, and can increase the service life of the bag dust collector.

Description

Technical Field

[0001] The invention relates to the field of drying drums for asphalt mixtures, and in particular to a smoke and odor removal double-drum drying system and method. Background Art

[0002] As the proportion of recycled materials added in the existing hot regeneration equipment in asphalt mixture plants increases, the treatment of recycled asphalt fume becomes more and more urgent; among them, the regeneration drying drum of the hot regeneration equipment in asphalt mixture plants will produce regeneration exhaust gas during operation, and the regeneration exhaust gas contains recycled asphalt fume.

[0003] One way to deal with harmful gases and odors in recycled asphalt fume is to burn the recycled asphalt fume through a special incinerator, but the high temperature of the exhaust gas after incineration causes energy loss. In order to reduce energy loss, another treatment method is currently used, that is, to pass the recycled asphalt fume into the original drying drum for secondary combustion, but this treatment method still has the following defects:

[0004] 1. Due to the large amount of regenerated asphalt fume generated by regeneration, the temperature of the exhaust gas generated by the original drying drum is relatively high, resulting in a high temperature of the exhaust gas entering the bag filter;

[0005] 2. The gas velocity in the original drying drum is accelerated, which will blow the coarse particles in the sand and gravel into the bag dust collector, which is easy to break the bag dust collector and reduce the service life of the bag dust collector;

[0006] 3. The amount of recycled asphalt fume is relatively large, and it cannot be guaranteed to be completely burned in the original drying drum at one time. There will still be asphalt fume in the bag dust collector. Summary of the invention

[0007] In view of the above-mentioned problems, the object of the present invention is to provide a double-drum drying system and method for smoke removal and deodorization, which can effectively remove smoke and deodorize the regenerated exhaust gas, ensure that the discharged exhaust gas meets environmental protection requirements, and improve the service life of the bag dust collector.

[0008] The present invention is achieved in that:

[0009] In a first aspect, a smoke and odor removal double-drum drying system comprises:

[0010] A virgin drying drum, wherein the discharge end of the virgin drying drum is provided with a discharge port and a regenerated asphalt fume input port;

[0011] A first burner, wherein the first burner is arranged at the discharge end of the raw drying drum;

[0012] A secondary combustion settling drum, wherein the discharge end of the secondary combustion settling drum is connected to the feed end of the primary drying drum through a chute, and the feed end of the primary drying drum is connected to the discharge end of the secondary combustion settling drum through a first flue; the feed end of the secondary combustion settling drum is provided with a sand and gravel feed port;

[0013] A second burner, the second burner is arranged at the discharge end of the secondary combustion settling drum;

[0014] Bag dust collector, the feed end of the secondary combustion settling drum is connected to the bag dust collector through a second flue.

[0015] Furthermore, the secondary combustion settling drum includes a front cylinder section forming a feed end, a rear cylinder section forming a discharge end, and a middle cylinder section located between the front cylinder section and the rear cylinder section, and the front cylinder section and the rear cylinder section are both smooth cylinder sections, and a plurality of groups of lifting blade groups are arranged at intervals on the inner wall of the middle cylinder section.

[0016] Furthermore, a plurality of baffles are arranged at intervals in the middle of the middle cylinder section, the baffles and the material lifting blade group are staggered, and the baffles are annular baffles, and the outer side walls of the baffles are connected to the inner wall of the middle cylinder section through a plurality of connecting plates.

[0017] Furthermore, each group of the lifting blade groups includes a plurality of lifting blades distributed at equal intervals around the circumferential direction.

[0018] Furthermore, the feed end of the secondary combustion settling drum is located at a position higher than the discharge end of the secondary combustion settling drum.

[0019] Furthermore, the feed end of the primary drying drum is located at a position higher than the discharge end of the primary drying drum.

[0020] Furthermore, a fan is provided at the output end of the bag filter.

[0021] Furthermore, it also includes a feeding belt conveyor, and the output end of the feeding belt conveyor extends into the sand and gravel feeding port.

[0022] Furthermore, it also includes a thermometer; the thermometer is arranged at the feed end of the secondary combustion settling drum, and the rotation speed of the secondary combustion settling drum is controlled according to the temperature detected by the thermometer.

[0023] In a second aspect, a double-drum drying method for smoke removal and deodorization is provided, wherein the double-drum drying system for smoke removal and deodorization is used, and the method comprises the following steps:

[0024] The secondary combustion settling drum and the primary drying drum are controlled to rotate, and the rotation speed of the secondary combustion settling drum is controlled according to the temperature of the feeding end of the secondary combustion settling drum; the regenerated tail gas containing the regenerated asphalt fume generated by the regenerated drying drum is transported to the discharging end of the primary drying drum, and the regenerated tail gas containing the regenerated asphalt fume is burned once by the first burner at the discharging end of the primary drying drum, and the sand and gravel are fed from the feeding end of the secondary combustion settling drum into the secondary combustion settling drum;

[0025] After the high-temperature exhaust gas after the primary combustion passes through the primary drying drum, the high-temperature exhaust gas is transported from the feed end of the primary drying drum to the discharge end of the secondary combustion settling drum, and the second burner is used to perform secondary combustion on the high-temperature exhaust gas at the discharge end of the secondary combustion settling drum. After passing through the secondary combustion settling drum, the high-temperature exhaust gas after the secondary combustion is transported to the bag dust collector from the feed end of the secondary combustion settling drum. At the same time, the sand and gravel pass through the secondary combustion settling drum and undergo a heat exchange with the high-temperature exhaust gas after the secondary combustion. The sand and gravel after the primary heat exchange is transported from the discharge end of the secondary combustion settling drum to the feed end of the primary drying drum. The sand and gravel continue to pass through the primary drying drum and undergo a secondary heat exchange with the high-temperature exhaust gas after the primary combustion. The sand and gravel after the secondary heat exchange is output from the discharge end of the primary drying drum.

[0026] By adopting the technical solution of the present invention, at least the following beneficial effects are achieved:

[0027] 1. When the regenerated tail gas is input into the original drying drum, the first burner can be used to burn the regenerated tail gas once. When the high-temperature tail gas generated after the primary combustion enters the secondary combustion settling drum, the second burner can be used to burn the high-temperature tail gas generated after the primary combustion for the secondary combustion. Through the two combustions, the regenerated asphalt fume in the regenerated tail gas can be fully burned, thereby ensuring that the regenerated asphalt fume will not affect the bag dust collector, which helps to increase the service life of the bag dust collector; at the same time, the sand and gravel are input from the feeding end of the secondary combustion settling drum, and the conveying direction of the sand and gravel is opposite to the high-temperature tail gas generated after the primary and secondary combustion. During the transportation process, the sand and gravel can exchange heat with the high-temperature exhaust gas. On the one hand, it can avoid the exhaust gas temperature entering the bag-type dust collector being too high, thereby preventing the high temperature from damaging the bag-type dust collector. On the other hand, it realizes the utilization of the thermal energy of the high-temperature exhaust gas, which has an energy-saving effect. In addition, the coarse particles in the high-temperature exhaust gas will decrease in speed and settle in the process of passing through the secondary combustion sedimentation drum, thereby preventing the coarse particles from entering the bag-type dust collector and affecting the service life of the bag-type dust collector. Therefore, through the technical solution of the present invention, the smoke and odor removal of the regenerated exhaust gas can be well achieved, ensuring that the discharged exhaust gas meets environmental protection requirements.

[0028] 2. The secondary combustion settling drum is designed to include a front drum section, a rear drum section and a middle drum section, and a lifting blade group is arranged on the inner wall of the middle drum section. In actual operation, the lifting blade group can be used to lift the sand and gravel entering the secondary combustion settling drum upward to form a material curtain, so that the sand and gravel can better exchange heat with the high-temperature exhaust gas after secondary combustion, thereby better reducing the exhaust gas temperature; at the same time, the front drum section and the rear drum section are both smooth drum sections, which can make it more convenient to feed and discharge sand and gravel.

[0029] 3. By arranging a plurality of annular baffles at intervals in the middle of the middle cylinder section, and connecting the baffles to the inner wall of the middle cylinder section through connecting plates, and staggering the baffles and the lifting blade group, on the one hand, the baffles and connecting plates can be used to guide the hot air flow to the cylinder wall of the secondary combustion settling drum, thereby effectively improving the heat exchange efficiency of the sand and gravel; on the other hand, the baffles and connecting plates can also reduce the speed of the hot air flow and dust in the secondary combustion settling drum, thereby further effectively preventing coarse particles in the dust from entering the bag collector, avoiding damage to the bag collector.

[0030] 4. By setting a thermometer at the feed end of the secondary combustion settling drum to detect the output exhaust gas temperature and controlling the rotation speed of the secondary combustion settling drum according to the temperature detected by the thermometer, the exhaust gas temperature entering the bag filter can be well adjusted, so that the exhaust gas temperature entering the bag filter can be reliably maintained at an appropriate temperature value, thereby effectively avoiding excessive exhaust gas temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0032] Figure 1 It is a structural diagram of a smoke and odor removal double-drum drying system of the present invention;

[0033] Figure 2 It is a structural diagram of the secondary combustion settling drum in the present invention;

[0034] Figure 3 yes Figure 2 The cross-sectional view along the AA direction;

[0035] Figure 4 yes Figure 2 Cross-sectional view along direction BB.

[0036] Description of reference numerals:

[0037] Smoke and odor removal double drum drying system 100;

[0038] Original drying drum 1, discharge port 11, regenerated asphalt fume inlet 12, first flue 13;

[0039] The first burner 2;

[0040] Secondary combustion settling drum 3, chute 31, gravel material feed port 32, second flue 33, front barrel section 34, rear barrel section 35, middle barrel section 36;

[0041] A second burner 4;

[0042] Bag dust collector 5, fan 51;

[0043] Lifting blade group 6, lifting blade 61;

[0044] Baffle 7, connecting plate 71;

[0045] Feed belt conveyor 8;

[0046] Thermometer 9. DETAILED DESCRIPTION

[0047] 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.

[0048] 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

[0049] See also Figures 1 to 4 As shown, the present invention provides a smoke removal and deodorization double drum drying system 100, and the smoke removal and deodorization double drum drying system 100 comprises:

[0050] A raw drying drum 1, wherein a discharge port 11 and a regenerated asphalt fume inlet 12 are provided at the discharge end of the raw drying drum 1; wherein the raw drying drum 1 is used to heat and dry the raw material, the discharge port 11 is used to deliver the heated and dried regenerated material, and the regenerated asphalt fume inlet 12 is used to receive the regenerated tail gas containing regenerated asphalt fume generated by the regenerated drying drum (not shown) during operation, so as to realize a primary combustion of the regenerated tail gas in the raw drying drum 1;

[0051] The first burner 2 is arranged at the discharge end of the primary drying drum 1, that is, the primary drying drum 1 adopts a countercurrent heating method, that is, the sand and gravel are conveyed in opposite directions to the high-temperature exhaust gas generated after the primary combustion in the primary drying drum 1; because the regenerated exhaust gas is input from the discharge end of the primary drying drum 1, the first burner 2 can perform a primary combustion on the regenerated exhaust gas;

[0052] A secondary combustion settling drum 3, the discharge end of the secondary combustion settling drum 3 is connected to the feed end of the primary drying drum 1 through a chute 31, so that the sand and gravel output by the secondary combustion settling drum 3 is fed into the primary drying drum 1 through the chute 31; the feed end of the primary drying drum 1 is connected to the discharge end of the secondary combustion settling drum 3 through a first flue 13, so that the high-temperature exhaust gas generated after the primary combustion can enter the secondary combustion settling drum 3 through the first flue 13; the feed end of the secondary combustion settling drum 3 is provided with a sand and gravel feed port 32, and the sand and gravel feed port 32 is used to transport sand and gravel into the secondary combustion settling drum 3, and the conveying direction of the sand and gravel and the high-temperature exhaust gas generated after the secondary combustion in the secondary combustion settling drum 3 is opposite; in specific operation, the secondary combustion settling drum 3 can not only play the role of drying and heating, but also play the role of settling the coarse particles in the high-temperature exhaust gas;

[0053] The second burner 4 is arranged at the discharge end of the secondary combustion settling drum 3. Since the high-temperature tail gas generated after the primary combustion is input from the discharge end of the secondary combustion settling drum 3, the second burner 4 can perform secondary combustion on the high-temperature tail gas generated after the primary combustion;

[0054] The bag filter 5, the feed end of the secondary combustion settling drum 3 is connected to the bag filter 5 through a second flue 33, and the bag filter 5 is used to filter the exhaust gas output by the secondary combustion settling drum 3 to ensure that the exhaust gas can meet environmental protection requirements.

[0055] By adopting the above technical solution of the present invention, at least the following beneficial effects are achieved:

[0056] When the regenerated tail gas is input into the original drying drum 1, the first burner 2 can be used to burn the regenerated tail gas once. When the high-temperature tail gas generated after the primary combustion enters the secondary combustion settling drum 3, the second burner 4 can be used to burn the high-temperature tail gas generated after the primary combustion for the secondary combustion. Through the two combustions, the regenerated asphalt fume in the regenerated tail gas can be fully burned, thereby ensuring that the regenerated asphalt fume will not affect the bag dust collector 5, which helps to improve the service life of the bag dust collector 5; at the same time, sand and gravel are input from the feeding end of the secondary combustion settling drum 3, and the conveying direction of the sand and gravel is opposite to that of the high-temperature tail gas generated after the primary and secondary combustion. During the transportation process, the sand and gravel can exchange heat with the high-temperature exhaust gas. On the one hand, it can avoid the exhaust gas entering the bag-type dust collector 5 from being too high, thereby preventing the high temperature from damaging the bag-type dust collector 5. On the other hand, it realizes the utilization of the thermal energy of the high-temperature exhaust gas, which has an energy-saving effect. In addition, the coarse particles in the high-temperature exhaust gas will decrease in speed and settle in the process of passing through the secondary combustion sedimentation drum 3, thereby preventing the coarse particles from entering the bag-type dust collector 5 and affecting the service life of the bag-type dust collector 5. Therefore, through the technical solution of the present invention, the smoke and odor removal of the regenerated exhaust gas can be well achieved, ensuring that the discharged exhaust gas meets environmental protection requirements.

[0057] In some embodiments of the present invention, the secondary combustion settling drum 3 includes a front barrel section 34 forming a feed end, a rear barrel section 35 forming a discharge end, and a middle barrel section 36 located between the front barrel section 34 and the rear barrel section 35, and the front barrel section 34 and the rear barrel section 35 are both smooth barrel sections, and a plurality of groups of lifting blade groups 6 are arranged at intervals on the inner wall of the middle barrel section 36. The specific number of the lifting blade groups 6 can be arranged according to actual needs. Of course, when the present invention is implemented in a specific manner, only a few groups of lifting blade groups 6 need to be arranged on the inner wall of the middle barrel section 36.

[0058] The present invention designs the secondary combustion settling drum 3 to include a front drum section 34, a rear drum section 35 and a middle drum section 36, and arranges a lifting blade group 6 on the inner wall of the middle drum section 36, so that during specific operation, the lifting blade group 6 can be used to lift the sand and gravel entering the secondary combustion settling drum 3 to form a material curtain, so that the sand and gravel can better exchange heat with the high-temperature exhaust gas after secondary combustion, thereby better reducing the exhaust gas temperature; at the same time, the front drum section 34 and the rear drum section 35 are both smooth drum sections, which can make it more convenient to feed and discharge sand and gravel.

[0059] In some embodiments of the present invention, a plurality of baffles 7 are arranged at intervals in the middle of the middle cylinder section 36 , the baffles 7 and the lifting blade group 6 are staggered with each other, and the baffles 7 are annular baffles, and the outer wall of the baffle 7 is connected to the inner wall of the middle cylinder section 36 through a plurality of connecting plates 71 .

[0060] The present invention sets a plurality of annular baffles 7 at intervals in the middle of the middle cylinder section 36, connects the baffles 7 to the inner wall of the middle cylinder section 36 through connecting plates 71, and staggers the baffles 7 and the lifting blade group 6. On the one hand, the baffles 7 and the connecting plates 71 can be used to guide the hot air flow to the cylinder wall of the secondary combustion settling drum 3, thereby effectively improving the heat exchange efficiency of the sand and gravel materials; on the other hand, the baffles 7 and the connecting plates 71 can also reduce the speed of the hot air flow and dust in the secondary combustion settling drum 3, thereby further effectively preventing coarse particles in the dust from entering the bag-type dust collector 5, thereby avoiding damage to the bag-type dust collector 5.

[0061] In some embodiments of the present invention, in order to achieve a better material lifting effect, each group of the material lifting blade group 6 includes a plurality of material lifting blades 61 distributed at equal intervals around the circumferential direction.

[0062] In some embodiments of the present invention, the feed end of the secondary combustion settling drum 3 is located at a position higher than the discharge end of the secondary combustion settling drum 3, that is, the entire secondary combustion settling drum 3 is in an inclined state, so that the secondary combustion settling drum 3 can deliver sand and gravel to the discharge end of the secondary combustion settling drum 3 during rotation.

[0063] In some embodiments of the present invention, the feed end of the native drying drum 1 is located at a position higher than the discharge end of the native drying drum 1, that is, the entire native drying drum 1 is in an inclined state, so that the native drying drum 1 can deliver sand and gravel to the discharge end of the native drying drum 1 during rotation.

[0064] In some embodiments of the present invention, the output end of the bag filter 5 is provided with a fan 51, so as to utilize the negative pressure generated by the fan 51 to send the high-temperature exhaust gas after secondary combustion into the bag filter 5 for filtration.

[0065] In some embodiments of the present invention, the smoke removal and deodorization dual-drum drying system 100 also includes a feeding belt conveyor 8, the output end of which extends into the sand and gravel feed port 32, so that the feeding belt conveyor 8 can be used to feed the sand and gravel into the secondary combustion sedimentation drum 3 through the sand and gravel feed port 32.

[0066] In some embodiments of the present invention, the smoke and deodorization double drum drying system 100 further includes a thermometer 9; the thermometer 9 is arranged at the feed end of the secondary combustion settling drum 3, and the speed of the secondary combustion settling drum 3 is controlled according to the temperature detected by the thermometer 9, that is, the secondary combustion settling drum 3 in the present invention adopts frequency conversion control. In the specific implementation of the present invention, a preset temperature value (the preset temperature value can be a range value) can be set first, and when the thermometer 9 detects that the temperature at the feed end of the secondary combustion settling drum 3 is greater than the preset temperature value, the secondary combustion settling drum 3 is controlled to increase the speed, thereby accelerating the thermal efficiency; when the thermometer 9 detects that the temperature at the feed end of the secondary combustion settling drum 3 is equal to the preset temperature value, the secondary combustion settling drum 3 is controlled to maintain the current speed; when the thermometer 9 detects that the temperature at the feed end of the secondary combustion settling drum 3 is less than the preset temperature value, the secondary combustion settling drum 3 is controlled to reduce the speed to increase the output exhaust temperature.

[0067] The present invention adopts a thermometer 9 to detect the output exhaust temperature by arranging a thermometer 9 at the feed end of the secondary combustion settling drum 3, and controls the rotation speed of the secondary combustion settling drum 3 according to the temperature detected by the thermometer 9, so as to well adjust the exhaust temperature entering the bag filter 5, so that the exhaust temperature entering the bag filter 5 can be reliably maintained at an appropriate temperature value, thereby effectively avoiding the exhaust temperature being too high.

[0068] The overall working principle of the smoke removal and deodorization double-drum drying system 100 of the present invention is as follows: control the secondary combustion settling drum 3 and the primary drying drum 1 to rotate, and control the first burner 2, the second burner 4 and the fan 51 to work at the same time; feed the sand and gravel from the sand and gravel feed port 32 of the secondary combustion settling drum 3 through the feeding belt conveyor 8, and feed the regenerated exhaust gas containing regenerated asphalt smoke generated by the regeneration drying drum from the regenerated asphalt smoke input port 12 of the primary drying drum 1; the first burner 2 performs a primary combustion on the regenerated exhaust gas containing regenerated asphalt smoke, and the high-temperature exhaust gas after the primary combustion enters the second burner through the first flue 13 after passing through the primary drying drum 1. The secondary combustion settling drum 3 is used, and the second burner 4 performs secondary combustion on the high-temperature exhaust gas after the primary combustion. The high-temperature exhaust gas after the secondary combustion enters the bag dust collector 5 through the second flue 33 for filtration after passing through the secondary combustion settling drum 3; the lifting blade group 6 will lift the sand and gravel outwards to form a material curtain when the sand and gravel passes through the secondary combustion settling drum 3, so that the sand and gravel can exchange heat with the high-temperature exhaust gas after the secondary combustion. The sand and gravel output from the secondary combustion settling drum 3 is sent to the primary drying drum 1 through the chute 31. The sand and gravel can exchange heat with the high-temperature exhaust gas after the primary combustion when passing through the primary drying drum 1, and finally the sand and gravel can be discharged through the discharge port 11. Embodiment 2

[0069] See also Figures 1 to 4 As shown, a double-drum drying method for smoke removal and deodorization of the present invention requires the use of a double-drum drying system 100 for smoke removal and deodorization. The specific structure and technical effects that can be obtained by the double-drum drying system 100 for smoke removal and deodorization are exactly the same as those in Example 1. Please refer to the detailed introduction of Example 1 for details, and will not be repeated here.

[0070] The method comprises the following steps:

[0071] The secondary combustion settling drum 3 and the primary drying drum 1 are controlled to rotate, and the rotation speed of the secondary combustion settling drum 3 is controlled according to the temperature of the feed end of the secondary combustion settling drum 3. That is, in the specific production process of the present invention, the temperature of the feed end of the secondary combustion settling drum 3 can be detected in real time by using the thermometer 9, and when it is detected that the temperature of the feed end of the secondary combustion settling drum 3 is greater than the preset temperature value, the secondary combustion settling drum 3 is controlled to increase the rotation speed, thereby accelerating the thermal efficiency; when it is detected that the temperature of the feed end of the secondary combustion settling drum 3 is equal to the preset temperature value, the secondary combustion settling drum 3 is controlled to maintain the current rotation speed; when it is detected that the temperature of the feed end of the secondary combustion settling drum 3 is less than the preset temperature value, the secondary combustion settling drum 3 is controlled to reduce the rotation speed to increase the output exhaust temperature;

[0072] The regenerated tail gas containing the regenerated asphalt fume generated by the regenerated drying drum is transported to the discharge end of the primary drying drum 1, and the regenerated tail gas containing the regenerated asphalt fume is burned once by the first burner 2 at the discharge end of the primary drying drum 1, and at the same time, the sand and gravel are fed from the feed end of the secondary combustion settling drum 3 into the secondary combustion settling drum 3, so that the conveying directions of the sand and gravel and the regenerated tail gas are exactly opposite;

[0073] After the high-temperature exhaust gas after the primary combustion passes through the primary drying drum 1, the high-temperature exhaust gas is transported from the feed end of the primary drying drum 1 to the discharge end of the secondary combustion settling drum 3, and the second burner 4 is used to perform secondary combustion on the high-temperature exhaust gas at the discharge end of the secondary combustion settling drum 3, so that the regenerated asphalt flue gas in the regenerated exhaust gas can be fully burned. After passing through the secondary combustion settling drum 3, the high-temperature exhaust gas after the secondary combustion is transported to the bag dust collector 5 from the feed end of the secondary combustion settling drum 3. At the same time, the sand and gravel pass through the secondary combustion settling drum 3 and undergo a heat exchange with the high-temperature exhaust gas after the secondary combustion. The sand and gravel after the primary heat exchange are transported from the discharge end of the secondary combustion settling drum 3 to the feed end of the primary drying drum 1. The sand and gravel continue to pass through the primary drying drum 1 and undergo a secondary heat exchange with the high-temperature exhaust gas after the primary combustion. The sand and gravel after the secondary heat exchange are output from the discharge end of the primary drying drum 1.

[0074] 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. A double-drum drying system for smoke removal and deodorization, characterized in that: include: A virgin drying drum, wherein the discharge end of the virgin drying drum is provided with a discharge port and a regenerated asphalt fume input port; A first burner, wherein the first burner is arranged at the discharge end of the raw drying drum; A secondary combustion settling drum, wherein the discharge end of the secondary combustion settling drum is connected to the feed end of the primary drying drum through a chute, and the feed end of the primary drying drum is connected to the discharge end of the secondary combustion settling drum through a first flue; the feed end of the secondary combustion settling drum is provided with a sand and gravel feed port; the secondary combustion settling drum comprises a front cylinder section forming the feed end, a rear cylinder section forming the discharge end, and a middle cylinder section located between the front cylinder section and the rear cylinder section, and the front cylinder section and the rear cylinder section are both smooth cylinder sections, and a plurality of groups of lifting blade groups are arranged at intervals on the inner wall of the middle cylinder section; a plurality of baffles are arranged at intervals in the middle of the middle cylinder section, and the baffles and the lifting blade groups are arranged staggered with each other; A second burner, the second burner is arranged at the discharge end of the secondary combustion settling drum; Bag dust collector, the feed end of the secondary combustion settling drum is connected to the bag dust collector through a second flue.

2. A smoke and odor removal double drum drying system as claimed in claim 1, characterized in that: The baffle is a circular ring-shaped baffle, and the outer side wall of the baffle is connected to the inner wall of the middle cylinder section through a plurality of connecting plates.

3. A smoke and odor removal double drum drying system as claimed in claim 1, characterized in that: Each group of the lifting blades comprises a plurality of lifting blades which are evenly spaced around the circumference.

4. A smoke and odor removal double drum drying system as claimed in claim 1, characterized in that: The feed end of the secondary combustion settling drum is located at a position higher than the discharge end of the secondary combustion settling drum.

5. The smoke and odor removal double-drum drying system according to claim 1, characterized in that: The feed end of the raw drying drum is located at a position higher than the discharge end of the raw drying drum.

6. A smoke and odor removal double drum drying system as claimed in claim 1, characterized in that: The output end of the bag filter is equipped with a fan.

7. A smoke and odor removal double drum drying system as claimed in claim 1, characterized in that: It also includes a feeding belt conveyor, the output end of which extends into the sand and gravel feeding port.

8. A smoke and odor removal double-drum drying system according to any one of claims 1 to 7, characterized in that: It also includes a temperature measuring instrument; the temperature measuring instrument is arranged at the feeding end of the secondary combustion settling drum, and the rotation speed of the secondary combustion settling drum is controlled according to the temperature detected by the temperature measuring instrument.

9. A double-drum drying method for smoke and odor removal, characterized in that: The method uses the smoke and odor removal double-drum drying system according to any one of claims 1 to 8, and the method comprises the following steps: The secondary combustion settling drum and the primary drying drum are controlled to rotate, and the rotation speed of the secondary combustion settling drum is controlled according to the temperature of the feeding end of the secondary combustion settling drum; the regenerated tail gas containing the regenerated asphalt fume generated by the regenerated drying drum is transported to the discharging end of the primary drying drum, and the regenerated tail gas containing the regenerated asphalt fume is burned once by the first burner at the discharging end of the primary drying drum, and the sand and gravel are fed from the feeding end of the secondary combustion settling drum into the secondary combustion settling drum; After the high-temperature exhaust gas after the primary combustion passes through the primary drying drum, the high-temperature exhaust gas is transported from the feed end of the primary drying drum to the discharge end of the secondary combustion settling drum, and the second burner is used to perform secondary combustion on the high-temperature exhaust gas at the discharge end of the secondary combustion settling drum. After passing through the secondary combustion settling drum, the high-temperature exhaust gas after the secondary combustion is transported to the bag dust collector from the feed end of the secondary combustion settling drum. At the same time, the sand and gravel pass through the secondary combustion settling drum and undergo a heat exchange with the high-temperature exhaust gas after the secondary combustion. The sand and gravel after the primary heat exchange is transported from the discharge end of the secondary combustion settling drum to the feed end of the primary drying drum. The sand and gravel continue to pass through the primary drying drum and undergo a secondary heat exchange with the high-temperature exhaust gas after the primary combustion. The sand and gravel after the secondary heat exchange is output from the discharge end of the primary drying drum.

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