Environment-friendly dust recovery tank for asphalt mixing station

Abstract

The utility model relates to the technical field of dust treatment, in particular to an environment-friendly dust recovery tank for an asphalt mixing station, which comprises a filter assembly, a purification assembly and a detection assembly, dust can be filtered in a multi-stage mode through the filter assembly, the filtered dust can be purified through the purification assembly, whether the dust treated through the filter assembly and the purification assembly reaches the standard or not can be detected in real time through the detection assembly, and if the air quality reaches the standard, air can be automatically discharged; if it is detected that the control quality does not reach the standard, substandard air is guided into the filtering assembly and the purifying assembly again to be purified again, if it is detected that the control quality does not reach the standard for many times, an alarm is automatically given to remind workers to come to process, and therefore the situation that the unpurified air is exhausted to the outside to pollute the environment or harm the human body can be avoided; the recycling and purifying effects are better.

Description

Technical Field

[0001] This utility model relates to the field of dust treatment technology, and in particular to an environmentally friendly dust recycling tank for asphalt mixing plants. Background Technology

[0002] Asphalt mixing plants, also known as asphalt concrete mixing plants or asphalt mixing stations, are mainly used to produce asphalt mixtures, modified asphalt mixtures, colored asphalt mixtures, etc. They are essential equipment for constructing highways, grade roads, municipal roads, airports, ports, etc. Asphalt mixing plants usually generate a large amount of dust during the asphalt production process. Therefore, relevant containers are usually used to collect the dust to avoid dust pollution of the surrounding environment or harm to the health of workers. Dust collection tanks of asphalt mixing plants are an important part of the environmental protection transformation of asphalt mixing plants, mainly used to collect and treat the dust generated during the production process.

[0003] Existing dust recovery tanks at asphalt mixing plants typically filter dust and then directly release the filtered air to the outside. Sometimes, due to incomplete filtration, harmful substances or substandard dust particles may still be present in the discharged air, resulting in poor recovery efficiency.

[0004] Therefore, in response to the problem that existing dust recovery tanks at asphalt mixing plants typically cannot detect whether the filtered air meets the standards before directly discharging it, resulting in residual harmful substances in the discharged air, an environmentally friendly dust recovery tank for asphalt mixing plants can be designed that can detect the composition of filtered and purified air in real time. It can determine whether the purification meets the standards based on the detection data, thus preventing incompletely purified air from being discharged into the outside world, polluting the environment or causing harm to the human body, and achieving better recovery results. Utility Model Content

[0005] In order to overcome the problem that existing asphalt mixing plant dust recovery tanks usually cannot detect whether the filtered air meets the standards before directly discharging it, resulting in harmful substances remaining in the discharged air.

[0006] The technical solution of this utility model is as follows: an environmentally friendly dust recovery tank for asphalt mixing plants, comprising a filter assembly, a purification assembly, and a detection assembly. The filter assembly is used for graded filtration of dust. A purification assembly for purifying the filtered dust is fixedly connected to the right end of the filter assembly. A detection assembly for detecting and discharging the purified air is fixedly connected to the right end of the filter assembly. The filter assembly, purification assembly, and detection assembly are interconnected. The detection assembly includes a detection box, a gas analyzer, a dust meter, a data analysis module, an alarm, an exhaust pipe, a circulation pipe, and a solenoid valve. An exhaust pipe is fixedly connected to the end of the detection box away from the purification assembly. A circulation pipe, which communicates with the filter assembly, is fixedly connected to the rear end of the detection box. The exhaust pipe and the circulation pipe are connected to the detection box. Solenoid valves are installed on the outer side of the connection and on the outer side of the connection between the circulation pipe and the filter assembly. A gas analyzer is fixedly installed at the upper front left of the detection box. A dust meter is fixedly installed along the upper edge of the detection box to the right of the gas analyzer. A data analysis module is fixedly installed at the upper rear of the detection box. The gas analyzer and the dust meter are electrically connected to the data analysis module through connecting cables. Three sets of alarms are evenly distributed and fixedly installed from left to right in the upper middle of the data analysis module. The data analysis module analyzes and summarizes the detection data of the gas analyzer and the dust meter and controls the opening and closing of the solenoid valves. The data analysis module contains a data acquisition module, a data analysis and processing module, a control decision module, an electromagnetic control module, and a user interface and report generation module.

[0007] Preferably, the filter assembly includes a first filter box, a second filter box, a third filter box, a first filter plate, a second filter plate, a first filter block, a feed pipe, a discharge pipe, and a pressure controller. The first filter box, the second filter box, and the third filter box are fixedly connected from top to bottom. The bottom of the first filter box and the second filter box, and the right end of the third filter box are respectively fixedly installed with the first filter plate, the second filter plate, and the first filter block, whose pore sizes decrease sequentially.

[0008] Preferably, the first filter box, the second filter box, and the third filter box are all fixedly connected to the bottom left end of the discharge pipe for discharging the filtered dust. The discharge pipe is provided with a control valve for controlling the dust in and out, and a pressure controller for controlling the air pressure is fixedly installed at the control valve on the outside of the discharge pipe.

[0009] Preferably, a feed pipe for introducing dust is fixedly installed at the upper middle part of the first filter box, and a control valve for controlling the inflow and outflow is provided on the outside of the connection between the feed pipe and the first filter box.

[0010] Preferably, the purification assembly includes a purification box, a mounting frame, a guide pipe, a second filter block, a third filter plate, and a box cover. The left end of the purification box is fixedly connected to the mounting frame, and the left end of the mounting frame is fixedly connected to the guide pipe for communicating with the filter assembly.

[0011] Preferably, a fan is fixedly installed in the middle of the inner side of the mounting frame, and a second filter block is fixedly installed at one end of the mounting frame near the purification box. Activated carbon is placed inside the purification box.

[0012] Preferably, the upper part of the purification box is provided with a lid for opening and closing, and a third filter plate is fixedly installed on the right end of the purification box.

[0013] The beneficial effects of this utility model are:

[0014] 1. By setting up filtration components, dust can be filtered in multiple stages. By setting up purification components, the filtered dust can be purified. By setting up detection components, it can detect in real time whether the air quality after being treated by the filtration and purification components meets the standards. If the air quality meets the standards, the air will be automatically discharged. If the air quality does not meet the standards, the substandard air will be reintroduced into the filtration and purification components for purification again. If the standards are not met after multiple detections, an alarm will be automatically triggered to remind staff to handle the situation. This can prevent incompletely purified air from being discharged into the outside world and polluting the environment or causing harm to the human body. The recycling and purification effect is better. Attached Figure Description

[0015] Figure 1 The diagram shown is a three-dimensional structural schematic of the dust environmental protection recycling tank for asphalt mixing plants according to this utility model.

[0016] Figure 2 The diagram shown is a three-dimensional structural schematic of the dust environmental protection recycling tank for asphalt mixing plants according to this utility model.

[0017] Figure 3 The diagram shown is a three-dimensional structural schematic of the dust environmental protection recycling tank filter assembly of the asphalt mixing plant according to this utility model.

[0018] Figure 4 The diagram shown is a three-dimensional structural schematic of the dust environmental protection recycling tank purification component of the asphalt mixing plant according to this utility model.

[0019] Figure 5 The diagram shown is a three-dimensional structural schematic of the dust environmental protection recycling tank detection component for asphalt mixing plants according to this utility model.

[0020] Explanation of reference numerals in the attached drawings: 101, First filter box; 102, Second filter box; 103, Third filter box; 104, First filter plate; 105, Second filter plate; 106, First filter block; 107, Feed pipe; 108, Discharge pipe; 109, Pressure controller; 201, Purification box; 202, Mounting frame; 203, Guide pipe; 204, Second filter block; 205, Third filter plate; 206, Box cover; 301, Detection box; 302, Gas analyzer; 303, Dust meter; 304, Data analysis module; 305, Alarm; 306, Exhaust pipe; 307, Circulation pipe; 308, Solenoid valve. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] An asphalt mixing plant is a large-scale equipment combination used to produce asphalt mixtures. It mixes asphalt, aggregates (such as gravel and sand), mineral powder, etc. in a certain proportion to produce asphalt mixtures that meet the requirements of road construction and other engineering projects.

[0023] Asphalt mixing plants generate a large amount of dust during the production process. This dust not only pollutes the environment but may also harm the health of workers. Therefore, during the asphalt production process, relevant containers are usually used to collect the generated dust to prevent a large amount of dust from leaking out.

[0024] Dust collection tanks at asphalt mixing plants are important equipment used to collect, process, and store dust. They are usually connected to various dust-generating points in the asphalt mixing plant, and dust is transported to the collection tank through pipelines. Inside the collection tank, the dust undergoes a series of filtration and processing processes before being collected.

[0025] The development history of dust recovery tanks in asphalt mixing plants is closely related to the development of asphalt mixture mixing equipment. With the increasing awareness of environmental protection and the progress of technology, dust recovery technology has gradually gained attention and development.

[0026] Asphalt mixing equipment originated in the United States. In the early 20th century, the US began producing asphalt mixtures using traditional methods. With technological advancements, the first asphalt mixing plant in the US was introduced in 1912. Over the following decades, asphalt mixing equipment continued to evolve, incorporating features such as cold silos and vibrating screens, improving production efficiency and mixture quality. However, the dust generated during asphalt mixing gradually became a significant problem, impacting the environment and worker health.

[0027] To address this issue, dust removal and dust recovery technologies have been introduced into asphalt mixing plants. Initially, these may have been simple dust removal devices, such as inertial dust removal systems, used to reduce dust emissions. However, with technological advancements and stricter environmental requirements, dust recovery technology has gradually gained importance and has become an indispensable part of asphalt mixing plants.

[0028] In modern asphalt mixing plants, dust collection tanks, as a key component of the dust collection system, employ advanced dust removal and recycling technologies, such as bag filters and electrostatic precipitators, to efficiently capture and process the dust generated during production. This recovered dust not only reduces environmental pollution but also serves as a supplement to production raw materials, achieving resource recycling.

[0029] Currently, various types of dust recovery tanks for asphalt mixing plants exist on the market, designed to effectively capture, process, and recover dust generated during asphalt mixing to reduce environmental pollution, improve resource utilization, and meet stringent environmental emission standards. Examples include: 1. Recovered Powder Humidifying Mixer: This device uniformly mixes the recovered dust from the asphalt mixture with other components. It mainly consists of a mixing host, unloading device, and electrical control system. Humidification and mixing allow the recovered powder to better combine with other components, thereby improving the quality and performance of the asphalt pavement. Problems: Specific problems may vary depending on the equipment model, usage, and maintenance. Generally, mixer maintenance, mixing efficiency, and the uniformity of the mixed material are key concerns. Improper mixer design or operation can lead to uneven mixing, affecting the effectiveness of the recovered powder. 2. Pulse Jet Bag Filter: A pulse jet bag filter mainly consists of a housing, filter bags, a frame, a cleaning device, a dust hopper, and a dust discharge device. Dust-laden gas enters the filter through the inlet and is filtered by the filter bags. The dust is trapped on the outer surface of the filter bags, and the purified gas exits through the outlet. When the dust accumulates on the surface of the filter bags to a certain level, the cleaning device automatically activates, blowing compressed air into the filter bags to cause them to vibrate and shake off the surface dust into the dust hopper, which is then discharged through the dust discharge device. Problems: Filter bag clogging and damage are common problems with pulse jet bag filters. Clogging affects dust collection efficiency; damage leads to dust leakage. The operating efficiency and stability of the cleaning device are also crucial. Incomplete cleaning or excessive cleaning frequency will affect the performance and lifespan of the dust collector. Furthermore, the installation, commissioning, and maintenance of the dust collector require professional knowledge and skills; otherwise, its normal operation and dust collection efficiency may be affected.

[0030] In summary, different types of dust recovery tanks for asphalt mixing plants each have their own working principles and potential problems. When selecting and using them, a comprehensive consideration should be made based on specific needs and actual conditions to ensure the performance and stability of the equipment.

[0031] Please see Figures 1-2 This utility model provides an embodiment: an environmentally friendly dust recovery tank for asphalt mixing plants, including a filter component, a purification component, and a detection component. The filter component is used to perform graded filtration of dust. The right end of the filter component is fixedly connected to a purification component for purifying the filtered dust. The right end of the filter component is fixedly connected to a detection component for detecting and discharging the purified air. The filter component, purification component, and detection component are interconnected.

[0032] Please see Figure 3In this embodiment, the filtration assembly includes a first filter box 101, a second filter box 102, a third filter box 103, a first filter plate 104, a second filter plate 105, a first filter block 106, a feed pipe 107, a discharge pipe 108, and a pressure controller 109. The first filter box 101, the second filter box 102, and the third filter box 103 are fixedly connected from top to bottom. The bottom of the first filter box 101 and the second filter box 102, and the right end of the third filter box 103 are respectively fixedly installed with the first filter plate 104, the second filter plate 105, and the first filter block 106, with the pore sizes decreasing sequentially. Block 106, the left end of the first filter box 101, the second filter box 102 and the third filter box 103 are all fixedly connected to the bottom position of the discharge pipe 108 for discharging the filtered dust. The outer side of the discharge pipe 108 is provided with a control valve for controlling the dust to enter and exit. A pressure controller 109 for controlling the air pressure is fixedly installed at the control valve on the outer side of the discharge pipe 108. The upper middle part of the first filter box 101 is fixedly installed with a feed pipe 107 for introducing dust. The outer side of the connection between the feed pipe 107 and the first filter box 101 is provided with a control valve for controlling the entry and exit.

[0033] Please see Figure 4 In this embodiment, the purification assembly includes a purification box 201, a mounting frame 202, a guide pipe 203, a second filter block 204, a third filter plate 205, and a box cover 206. The mounting frame 202 is fixedly connected to the left end of the purification box 201. The guide pipe 203 for communicating with the filter assembly is fixedly connected to the left end of the mounting frame 202. A fan is fixedly installed in the middle of the inner side of the mounting frame 202. The second filter block 204 is fixedly installed at the end of the mounting frame 202 near the purification box 201. Activated carbon is placed inside the purification box 201. The upper end of the purification box 201 is provided with a box cover 206 for opening and closing. The third filter plate 205 is fixedly installed at the right end of the purification box 201.

[0034] Please see Figure 5In this embodiment, the detection assembly includes a detection box 301, a gas analyzer 302, a dust meter 303, a data analysis module 304, an alarm 305, an exhaust pipe 306, a circulation pipe 307, and a solenoid valve 308. The exhaust pipe 306 is fixedly connected to the end of the detection box 301 furthest from the purification assembly. A circulation pipe 307, communicating with the filter assembly, is fixedly connected to the rear end of the detection box 301. Solenoid valves 308 are provided on the outer sides of the connections between the exhaust pipe 306 and the circulation pipe 307 and the detection box 301, as well as on the outer side of the connection between the circulation pipe 307 and the filter assembly. The gas analyzer 302 is fixedly installed at the upper front left position of the detection box 301. The upper end of the detection box 301 extends along the gas... A gas analyzer 302 is fixedly mounted to the right along the edge of a dust meter 303. A data analysis module 304 is fixedly mounted at the upper rear of the detection box 301. Both the gas analyzer 302 and the dust meter 303 are electrically connected to the data analysis module 304 via connecting cables. Three sets of alarms 305 are evenly distributed and fixedly mounted from left to right at the upper middle of the data analysis module 304. The data analysis module 304 analyzes and summarizes the detection data of the gas analyzer 302 and the dust meter 303 and controls the opening and closing of the solenoid valve 308. The data analysis module 304 contains a data acquisition module, a data analysis and processing module, a control decision module, an electromagnetic control module, and a user interface and report generation module.

[0035] When working, first move the device to the corresponding position and place it, open the box cover 206 at the top of the purification box 201, put the activated carbon into the purification box 201 and then close the box cover 206. Next, connect the device to the dust outlet of the asphalt mixing plant through the feed pipe 107 and open the control valve on the outside of the feed pipe 107.

[0036] Then, the dust is introduced into the filter assembly through the feed pipe 107, and the dust is filtered sequentially through the first filter plate 104 and the second filter plate 105 at the bottom of the first filter box and the second filter box, and the first filter block 106 at the right end of the third filter box.

[0037] Afterwards, the filtered air enters the mounting frame 202 from the guide pipe 203 under the action of the fan in the mounting frame 202, and continues to pass through the second filter block 204 into the purification box 201. The filtered air is further processed and purified by the activated carbon in the purification box 201, so that the purified air enters the detection box 301 from the third filter plate 205.

[0038] The purified air is then tested by the gas analyzer 302 and the dust meter 303, and the test data is transmitted to the data analysis module 304 for summary analysis. If the control quality meets the standard, the data analysis module 304 will control the solenoid valve 308 on the outside of the exhaust pipe 306 to open and discharge qualified air from the exhaust pipe 306. If the air does not meet the standard, the data analysis module 304 will control the solenoid valve 308 on the outside of the exhaust pipe 306 to close and open the solenoid valves 308 at both ends of the circulation pipe 307 to introduce the substandard air into the filter assembly. The air will be processed again by the filter assembly and the purification assembly. If the air fails to meet the standard after multiple tests, the alarm 305 on the top of the data analysis module 304 will be automatically triggered to sound an alarm, and staff will come to handle the situation in time.

[0039] After final processing, open the control valve outside the discharge pipe 108 and adjust the air pressure through the pressure controller 109 to sequentially guide the dust particles of different sizes from the graded filter to the corresponding positions for recycling.

[0040] Through the above steps, by setting up detection components, it is possible to detect in real time whether the air quality after being treated by the filtration and purification components meets the standards. If the air quality meets the standards, the air will be automatically discharged. If the control quality is not met, the substandard air will be reintroduced into the filtration and purification components for further purification. If the standards are not met multiple times, an alarm will be automatically triggered to remind staff to handle the situation. This can prevent incompletely purified air from being discharged into the outside environment and polluting the environment or causing harm to the human body. The recycling and purification effect is better, which solves the problem that the existing dust recovery tanks of asphalt mixing plants usually filter the dust and then directly discharge the filtered air into the outside environment. Sometimes, due to incomplete filtration, the discharged air may still contain harmful substances or substandard dust particles, resulting in poor recycling effect.

Claims

1. An asphalt plant dust environmentally friendly recovery tank comprising a filter assembly; characterized by: The utility model also includes purifying assembly and detection assembly, filter assembly is used for grading filter to dust, the right end fixedly connected with purifying assembly for purifying treatment to dust after filtering of filter assembly, the right end fixedly connected with detection assembly for detecting and discharging the air after purifying of speaking assembly, filter assembly, purifying assembly and detection assembly communicate with each other, detection assembly includes detection box (301), gas analyzer (302), smoke measuring instrument (303), data analysis module (304), alarm (305), exhaust pipe (306), circulating pipe (307) and solenoid valve (308), the one end fixedly connected with exhaust pipe (306) of detection box (301) away from purifying assembly, the rear end fixedly connected with circulating pipe (307) of detection box (301) and filter assembly intercommunication, the outside of exhaust pipe (306) and circulating pipe (307) and detection box (301) junction and the outside of circulating pipe (307) and filter assembly junction all are equipped with solenoid valve (308), the left position fixed mounting of upper end front of detection box (301) has gas analyzer (302), the upper end along gas analyzer (302) right along fixed mounting of detection box (301) has smoke measuring instrument (303), the rear part fixed mounting of upper end of detection box (301) has data analysis module (304), and gas analyzer (302) and smoke measuring instrument (303) all are electrically connected with data analysis module (304) through connecting line, the upper end middle part of data analysis module (304) is uniformly fixedly installed with three sets of alarm (305) from left to right, and the detection data of gas analyzer (302) and smoke measuring instrument (303) is analyzed and is controlled solenoid valve (308) opening and closing through data analysis module (304) retrograde collection, and data analysis module (304) is equipped with data acquisition module, data analysis and processing module, control decision module, electromagnetic control module and user interface and report generation module inside.

2. An asphalt mixing plant dust environmentally friendly recovery tank according to claim 1, characterized in that: The filter assembly includes a first filter box (101), a second filter box (102), a third filter box (103), a first filter plate (104), a second filter plate (105), a first filter block (106), an inlet pipe (107), a discharge pipe (108), and a pressure controller (109). The first filter box (101), the second filter box (102), and the third filter box (103) are fixedly connected in order from top to bottom. The bottom of the first filter box (101) and the second filter box (102) and the right end of the third filter box (103) are fixedly installed with the first filter plate (104), the second filter plate (105), and the first filter block (106) in order from large to small in aperture size.

3. An asphalt mixing plant dust environmentally friendly recovery tank according to claim 2, characterized in that: The left end of the first filter box (101), the second filter box (102), and the third filter box (103) is fixedly connected with the discharge pipe (108) near the bottom position for discharging the dust after filtering. The outside of the discharge pipe (108) is provided with a control valve for controlling the dust in and out. The control valve outside the discharge pipe (108) is fixedly installed with a pressure controller (109) for controlling the air pressure size.

4. An asphalt mixing plant dust environmentally friendly recovery tank according to claim 2, characterized in that: The upper middle part of the first filter box (101) is fixedly provided with a feeding pipe (107) for guiding dust, and the outer side of the connection part of the feeding pipe (107) and the first filter box (101) is provided with a control valve for controlling the in-out.

5. An asphalt mixing plant dust environment-friendly recovery tank according to claim 1, characterized in that: The purification assembly comprises a purification box (201), a mounting frame (202), a flow guide pipe (203), a second filter block (204), a third filter plate (205) and a box cover (206), the left end of the purification box (201) is fixedly connected with the mounting frame (202), and the left end of the mounting frame (202) is fixedly connected with the flow guide pipe (203) for being communicated with the filter assembly.

6. An asphalt mixing plant dust environmentally friendly recovery tank according to claim 5, characterized in that: The inner side middle part of the mounting frame (202) is fixedly provided with a fan, one end of the mounting frame (202) close to the purification box (201) is fixedly provided with the second filter block (204), and the purification box (201) is used for placing activated carbon.

7. An asphalt mixing plant dust environmentally friendly recovery tank according to claim 5, characterized in that: The upper end of the purification box (201) is provided with the box cover (206) for being opened and closed, and the right end of the purification box (201) is fixedly provided with the third filter plate (205).

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