Asphalt integrated machine double-loop asphalt fume treatment system

Abstract

The utility model belongs to pitch integrated machine equipment technical field relates to a pitch integrated machine double loop pitch flue gas treatment system, including blue smoke processing system, induced draft fan, overflow mouth air suction cover, finished product material air suction cover, connecting flue, air suction valve one, air suction valve two, air suction valve three, air suction valve four, overflow mouth air suction cover installs in the lower part of overflow bin, and finished product material air suction cover installs in the lower part of finished product bin. The utility model can put the dust that overflow bin discharging, brush pot material discharging produces, and the pitch flue gas that pitch finished product material discharging produces is handled through different pipeline path, and is realized through the different opening combination of air suction valve one to air suction valve four.

Description

Technical Field

[0001] This utility model belongs to the technical field of integrated asphalt machine equipment, specifically relating to a dual-circuit asphalt fume treatment system for an integrated asphalt machine. Background Technology

[0002] During the production of asphalt mixtures, especially when mobile asphalt mixing plants are operating, a large amount of blue smoke and high-temperature overflow dust containing carcinogenic substances such as tar particles and benzo[a]pyrene are generated. Traditional integrated asphalt mixing plant flue gas treatment systems use a single-loop system, meaning that asphalt fumes from finished material discharge and dust from overflow and washing processes are treated through the same pipeline. This can easily lead to reduced lifespan of the blue smoke treatment system and incomplete dust treatment.

[0003] When high-temperature overflow flue gas mixes with low-temperature asphalt fumes, the spray cooling efficiency decreases, and condensed tar agglomerates easily form in the pipeline. Mineral dust and tar particles adsorb each other, causing the electrostatic precipitator plates to accumulate scale faster and the activated carbon adsorption capacity to decrease. In order to balance the treatment of high-temperature and low-temperature flue gas, the induced draft fan needs to operate at full load for a long time.

[0004] Therefore, a dual-circuit asphalt fume treatment system for an integrated asphalt machine is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a dual-circuit asphalt fume treatment system for an integrated asphalt processing machine. Addressing the shortcomings of existing technologies, this system treats asphalt fumes and dust generated during overflow and washing processes in two separate circuits. The asphalt fumes are recycled into a blue smoke treatment system for further processing, while the waste dust is recycled into the primary drum and processed by the main dust collector. This achieves thorough treatment of both dust and fumes.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a dual-circuit asphalt fume treatment system for an integrated asphalt machine, including a blue smoke treatment system. One end of the blue smoke treatment system is connected to an induced draft fan, and the other end of the blue smoke treatment system is connected to a finished material suction hood through a connecting flue. An overflow port suction hood is led out from the connecting flue. A suction valve one is provided at the front end of the finished material suction hood, a suction valve two is provided at the front end of the overflow port suction hood, a suction valve three is provided on the connecting flue, and a suction valve four is provided at the front end of the induced draft fan.

[0007] Preferably, the overflow port suction hood is a square perforated pipe installed at the bottom of the overflow hopper, and the finished product suction hood is a square perforated pipe installed at the bottom of the finished product hopper.

[0008] Preferably, the first, second, third and fourth suction valves are flues with cylinder-controlled flaps for opening and closing.

[0009] Preferably, the blue smoke treatment system includes a multi-stage treatment device, which includes, in sequence: a spray zone, an oil mist separation zone, a smoke removal zone, an odor removal zone, and a purification zone. The treatment devices are connected by high-temperature resistant corrugated pipes.

[0010] Preferably, the opening ratio of the overflow port suction hood and the finished product suction hood is 35%-40%, the hole spacing is 50-80mm, and the inner wall of the overflow port suction hood and the finished product suction hood is coated with a polytetrafluoroethylene anti-stick coating.

[0011] Preferably, a PLC is also included. The cylinders of suction valve one, suction valve two, suction valve three and suction valve four are connected to the PLC through solenoid valves. A material level sensor is provided inside the finished material suction hood, and a pressure sensor is provided inside the overflow port suction hood.

[0012] Preferably, the spray zone is equipped with a water spraying device, the oil mist separation zone is equipped with a demisting device, the smoke removal zone is equipped with an electrostatic precipitator, the deodorization zone is equipped with a secondary electrostatic precipitator, and the purification zone is equipped with an activated carbon device.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. This utility model can treat the dust generated by the discharge of overflow hopper and the discharge of slag from the washing pot, and the asphalt fumes generated by the discharge of finished asphalt material through different pipeline paths, and achieve this through different opening combinations of suction valve one to suction valve four.

[0015] 2. This utility model treats asphalt fumes and dust from spilled materials and washing pot materials in two separate processes. The asphalt fumes are recycled into a blue smoke treatment system for further processing, while the waste dust is recycled into a primary drum and processed by the main dust collector. This achieves thorough treatment of dust and fumes. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of a dual-circuit asphalt fume treatment system for an integrated asphalt machine according to one embodiment;

[0018] Figure 2 This is a rear view of a dual-circuit asphalt fume treatment system for an integrated asphalt machine, according to one embodiment.

[0019] Figure 3This is a side view of a dual-circuit asphalt fume treatment system for an integrated asphalt machine, according to one embodiment.

[0020] Figure 4 This is a top view of a dual-circuit asphalt fume treatment system for an integrated asphalt machine, according to one embodiment.

[0021] In the above figures, 1. Overflow port suction hood, 2. Finished material suction hood, 3. Connecting flue, 4. Suction valve one, 5. Suction valve two, 6. Suction valve three, 7. Suction valve four, 8. Blue smoke treatment system, 9. Exhaust fan. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0024] Example 1, such as Figure 1-4 As shown, a dual-loop asphalt fume treatment system for an integrated asphalt processing machine includes a blue smoke treatment system 8. The blue smoke treatment system 8 serves as a purification unit, purifying the asphalt fume in stages to ensure emissions meet standards. One end of the blue smoke treatment system 8 is connected to an induced draft fan 9, which provides negative pressure suction to drive the fume and dust into the blue smoke treatment system 8, ensuring efficient gas flow and preventing the escape of smoke and dust.

[0025] The other end of the blue smoke treatment system 8 is connected to the finished product suction hood 2 via the connecting flue 3. The connecting flue 3 leads to the overflow port suction hood 1. The finished product suction hood 2 collects the asphalt fumes generated when the finished product bin is discharged, and the overflow port suction hood 1 collects the dust from the overflow bin and the brush pot. The front end of the finished product suction hood 2 is equipped with suction valve 1 4, the front end of the overflow port suction hood 1 is equipped with suction valve 2 5, the connecting flue 3 is equipped with suction valve 3 6, and the front end of the induced draft fan 9 is equipped with suction valve 4 7.

[0026] The specific design of the aforementioned key components will be discussed in detail below:

[0027] The overflow port suction hood 1 is a square perforated pipe installed at the bottom of the overflow hopper, and the finished product suction hood 2 is a square perforated pipe installed at the bottom of the finished product hopper. The opening ratio of the overflow port suction hood 1 and the finished product suction hood 2 is 35%-40%, the hole spacing is 50-80mm, and the inner wall of the overflow port suction hood 1 and the finished product suction hood 2 is coated with a polytetrafluoroethylene anti-stick coating.

[0028] The square pipe conforms to the shape of the silo, covering a large area. Its 35%-40% opening ratio ensures uniform negative pressure distribution, preventing localized flue gas escape. Coated with polytetrafluoroethylene (PTFE), it reduces asphalt particle adhesion and clogging. Inclined downwards at 15°-20°, it utilizes gravity for self-cleaning, facilitating the removal of accumulated dust.

[0029] The suction valves 4, 5, 6, and 7 are flues with cylinder-controlled flaps for opening and closing. The cylinders control the flaps to switch between dual-loop operation modes: when handling asphalt fumes, suction valves 4 and 6 are open, while suction valves 5 and 7 are closed; when handling overflow dust, suction valves 5 and 7 are open, while suction valves 4 and 6 are closed. This physical isolation of the dual loops prevents cross-contamination between dust and asphalt fumes, extends the lifespan of the blue smoke system, ensures rapid response, and reduces human error.

[0030] The blue smoke treatment system 8 includes a multi-stage treatment device, which includes, in sequence: a spray zone, an oil mist separation zone, a smoke removal zone, an odor removal zone, and a purification zone. Each treatment device is connected by a high-temperature resistant corrugated pipe. The high-temperature resistant corrugated pipe connection is adapted to high-temperature flue gas and avoids damage caused by thermal expansion and contraction.

[0031] It also includes a PLC. The cylinders of suction valve 4, suction valve 5, suction valve 6, and suction valve 7 are connected to the PLC via solenoid valves. The finished material suction hood 2 is equipped with a material level sensor, and the overflow port suction hood 1 is equipped with a pressure sensor. The PLC receives real-time data from the material level sensor and the pressure sensor. When the overflow hopper pressure is >500Pa, it automatically switches to dust mode and linearly adjusts the valve opening according to the hopper filling degree (30%-100%).

[0032] The spray zone is equipped with water spraying equipment, the oil mist separation zone with demister equipment, the smoke removal zone with electrostatic precipitator equipment, the odor removal zone with secondary electrostatic precipitator equipment, and the purification zone with activated carbon equipment. The water spraying equipment uses high-pressure atomization spraying (0.8-1.2 MPa) to rapidly reduce the flue gas temperature from 150-200℃ to below 80℃, condensing and removing large tar particles. The demister equipment is a composite structure of baffles and wire mesh, capturing oil mist particles larger than 5μm. The stainless steel wire mesh is removable and washable, reusable more than 50 times, and the separated tar can be recycled, reducing treatment costs. The electrostatic precipitator uses high-voltage electrostatic (40-60kV) to adsorb 0.1-5μm asphalt fume particles. The secondary electrostatic precipitator specifically treats harmful organic compounds such as benzo[a]pyrene, and activated carbon adsorbs residual odor molecules, ensuring emissions meet standards.

[0033] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A dual-circuit asphalt fume treatment system for an integrated asphalt processing machine, comprising a blue smoke treatment system, characterized in that, One end of the blue smoke treatment system is connected to the induced draft fan, and the other end of the blue smoke treatment system is connected to the finished material suction hood through the connecting flue. The connecting flue leads out to the overflow port suction hood. The front end of the finished material suction hood is equipped with suction valve one, the front end of the overflow port suction hood is equipped with suction valve two, suction valve three is equipped on the connecting flue, and suction valve four is equipped on the front end of the induced draft fan.

2. The dual-circuit asphalt fume treatment system for an integrated asphalt processing machine according to claim 1, characterized in that, The overflow port suction hood is a square perforated pipe installed at the bottom of the overflow hopper, and the finished product suction hood is a square perforated pipe installed at the bottom of the finished product hopper.

3. The dual-circuit asphalt fume treatment system for an integrated asphalt processing machine according to claim 1, characterized in that, The suction valve one, suction valve two, suction valve three and suction valve four are flues with cylinder-controlled flaps for opening and closing.

4. The dual-circuit asphalt fume treatment system for an integrated asphalt processing machine according to claim 1, characterized in that, The blue smoke treatment system comprises a multi-stage treatment device, which includes, in sequence: a spray zone, an oil mist separation zone, a smoke removal zone, an odor removal zone, and a purification zone. The treatment devices are connected by high-temperature resistant corrugated pipes.

5. The dual-circuit asphalt fume treatment system for an integrated asphalt processing machine according to claim 2, characterized in that, The opening ratio of the overflow port suction hood and the finished product suction hood is 35%-40%, the hole spacing is 50-80mm, and the inner wall of the overflow port suction hood and the finished product suction hood is coated with a polytetrafluoroethylene anti-stick coating.

6. The dual-circuit asphalt fume treatment system for an integrated asphalt processing machine according to claim 3, characterized in that, It also includes a PLC. The cylinders of suction valve one, suction valve two, suction valve three and suction valve four are connected to the PLC through solenoid valves. The finished material suction hood is equipped with a material level sensor, and the overflow port suction hood is equipped with a pressure sensor.

7. The dual-circuit asphalt fume treatment system for an integrated asphalt processing machine according to claim 4, characterized in that, The spray zone is equipped with water spraying equipment, the oil mist separation zone is equipped with demisting equipment, the smoke removal zone is equipped with electrostatic precipitator equipment, the odor removal zone is equipped with secondary electrostatic precipitator equipment, and the purification zone is equipped with activated carbon equipment.

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