Eco-friendly Asphalt Mixing Plant

Eco friendly asphalt mixing plant is a modernized equipment designed with advanced environmental protection technology and specially used for the production of asphalt mixtures, whose core feature is to realize low dust emission, low smoke toxicity, low noise pollution and high energy-saving efficiency in the whole production process.

This kind of equipment through the sealing isolation, high efficiency dust removal, smoke purification and material regeneration and other core technologies, the production of all aspects of environmental protection transformation, to ensure that the production process of exhaust gas, dust, noise and other pollutants are in line with the strict national and industry standards for environmental protection. Compared with the traditional asphalt mixing plant, environmentally friendly equipment from the source to reduce pollution, while optimizing the production process, is the key equipment to achieve green production in the field of highway construction, but also the current trend of environmental upgrading of road projects.

The answer is yes, Eco friendly asphalt mixing plant production of asphalt is not only in full compliance with industry quality standards, and even in a number of indicators are often better than the output of traditional equipment products. This type of asphalt mixing plant through technological upgrading to achieve the double guarantee of environmental protection and quality, specifically from three aspects:

1. Quality Compliance

Eco friendly asphalt mixing plant through the optimization of the production process, the introduction of accurate measurement and temperature control technology, the aggregate, bitumen, filler and other raw materials, the proportion of heating temperature, mixing process for accurate control. This design ensures that the quality of the finished asphalt concrete produced is stable, the dryness is up to standard, and all the engineering technical indexes meet the requirements of the technical specifications for highway asphalt pavement construction, so as to guarantee the core performance of asphalt mixture such as strength and spalling resistance from the source.

2. Technical Advantage Support

Modern Eco friendly asphalt mixing plant is equipped with advanced dust removal and exhaust gas treatment system, which can effectively control the emission of pollutants such as PM particles and VOCs, and at the same time, reasonably add recycled asphalt mixture (RAP), to achieve the recycling of waste materials. This technology not only meets the requirements of environmental protection, but also through the optimization of material ratios to enhance the overall performance of the asphalt mixture, so that environmental protection and quality enhancement of the formation of a virtuous cycle of production.

3. Strict Compliance with Standards

Eco friendly asphalt mixing plant production process needs to strictly follow the green production of asphalt mixing plant technical requirements and environmental assessment standards at all levels, the output of asphalt products also need to comply with the current national quality standards for highway engineering. Only equipment through the compliance acceptance, the production process meets the environmental protection and quality of the dual norms, in order to ensure the quality of the final asphalt products and compliance.

The core advantages of Eco friendly asphalt mixing plant is reflected in the asphalt quality, structural design, production efficiency, environmental performance and safety in five major dimensions, each feature is an accurate solution to the pain points of traditional equipment, as follows:

High-Quality Finished Asphalt

Equipped with 4 or 5 layers of vibrating screen, the hot aggregate can be stored separately according to the particle size specification, which provides the basis for accurate proportioning.

Adopting METTLER TOLEDO load cell to ensure the weighing accuracy of hot aggregate, bitumen and filler, and to guarantee the quality of asphalt from the raw material proportioning link;

Adopting batch mixing process, so that the raw materials are fully mixed to further enhance the uniformity and stability of the asphalt mixture.

New Structure Design; Enclosed Mixing Tower

Closed mixing tower is the core structural design of Eco friendly asphalt mixing plant equipment, equipped with safety doors to minimize dust and noise leakage, while preventing unrelated personnel from entering the mixing tower area, to ensure the safety of equipment operation and personal safety. In addition, the aggregate feeder and belt conveyor can be selected closed design (optional configuration), this feature allows Eco friendly asphalt mixing plant can be directly laid out in urban areas, expanding the application of the equipment scene.

Optimized Drying Drum

As the core heating component, the drying drum adopts the optimized internal structure design, which can realize rapid and uniform heating of the aggregate and greatly improve the heating efficiency. The outer layer of the drum is covered with heat insulation layer, which effectively reduces heat loss and energy consumption; at the same time, it is equipped with high-quality diesel or gas burner, which has high combustion efficiency and low pollutant emission, and the service life of the drum is longer, which reduces the long-term operation and maintenance cost of the Eco friendly asphalt mixing plant equipment.

Two Dust Filtration Systems, Less Dust Emission

The Eco friendly asphalt mixing plant is equipped with a two-stage dust removal and filtration system to control dust pollution from the source: the first stage is a cyclone dust collector to complete the preliminary dust interception; the second stage is a bag dust collector to realize deep dust removal. After double-stage dust removal treatment, the dust emission can be controlled at a very low level, which is far better than the traditional equipment and meets the stringent environmental emission requirements.

All-dimensional Safety Protection

The Eco friendly asphalt mixing plant equipment is installed with guardrails in many high-altitude work areas, and the mixing tower entrances and exits are equipped with safety gates to prohibit the entry of unrelated personnel, and all the aisles and ladders are designed with anti-skid, which can guarantee the safety of the equipment operation and personnel work in an all-round way, and reduce the safety risks in the production process.

Site selection directly affects the operating efficiency of Eco friendly asphalt mixing plant, environmental compliance and production costs, site selection should focus on three core elements:

Terrain and Location: away from residential areas, high terrain

Site selection should be prioritized to choose a higher terrain, away from residential areas and densely populated areas. On the one hand, some of the equipment to be installed underground, the terrain is high enough to avoid continuous rainfall leading to water damage to the Eco friendly asphalt mixing plant equipment, while preventing changes in the moisture content of the aggregate affect the quality of asphalt production; on the other hand, with the increasingly stringent requirements of the city's environmental protection, away from the urban areas of the site can be to circumvent the city road restrictions, environmental control and other restrictions, in line with the long-term production needs. At the same time the need for supporting the construction of drainage pipes and gravel yard to protect the site drainage and storage of raw materials.

Traffic Conditions: convenience first, control the transportation radius

Convenience of transportation is a key indicator of site selection. Eco friendly asphalt mixing plant needs a lot of transportation of raw materials and finished asphalt concrete, convenient traffic conditions can reduce transportation costs. At the same time, the economic operation of asphalt concrete radius needs to be controlled at 15-20 kilometers, site selection needs to be combined with this transportation characteristics, to ensure that the finished material transportation time within the norms, to reduce the asphalt mixture segregation and loss in the transportation process.

Terrain Suitability: fit the terrain layout

Eco friendly asphalt mixing plant should be located in a slightly undulating terrain area, can be used “on the upper level for the sand and gravel aggregates, the lower level for the mixing plant host and underground reservoir” layout model. This layout not only facilitates the direct unloading of aggregates into the mixing plant through the loader, but also efficiently collect rainwater, while a reasonable layout of the terrain can optimize the operation of the equipment process, laying the foundation for long-term stable production.

Modern Eco friendly asphalt mixing plant in the design of the installation and operation of the full consideration of the convenience, compared with the traditional non-environmentally friendly asphalt mixing plant equipment has more advantages, as follows:

Installation: modularized rapid deployment

The Eco friendly asphalt mixing plant equipment adopts modular design, the core components are completed in the factory pre-wiring, pre-assembly, significantly reducing the site construction workload. Mobile environmentally friendly asphalt mixing plant on the site foundation requirements are very low, only need to level the ground to complete the installation, the overall deployment cycle is short, usually 1-3 days to complete the installation and commissioning, and quickly put into production use.

Operation: automated intelligent control

The Eco friendly asphalt mixing plant equipment is equipped with an intuitive, automated control system, which can manage the whole production process of feeding, heating and mixing without frequent manual intervention. The automation system can precisely adjust the parameters according to the real-time production data to ensure stable asphalt quality and high production efficiency, while reducing the intensity of manual operation. Although the operation of the equipment requires certain professional skills, but compared with traditional equipment, its operation threshold is lower, easier to adapt to modern production needs.

Operation and maintenance management is to ensure long-term stable operation of Eco friendly asphalt mixing plant to maintain environmental performance of the core links, scientific operation and maintenance can not only extend the service life of the equipment, but also reduce the failure rate, improve production efficiency.

Regular Inspection of Core Components

Regular inspection of core production components such as mixing cylinder, drying drum, belt conveyor, etc. is required to focus on checking the operating status and wear and tear of the components, and to detect and deal with abnormal wear and tear and hidden faults in a timely manner, so as to ensure the normal operation of all aspects of the Eco friendly asphalt mixing plant equipment.

Lubrication System Maintenance

Regular inspection and refueling of the Eco friendly asphalt mixing plant equipment lubrication system to maintain good lubrication of the moving parts, reduce friction and wear and tear, prolong the service life of the parts and reduce the equipment failure rate.

Key Operation and Maintenance of Environmental Protection Facilities

The bag filter, flue gas denitrification and desulfurization device and other environmental protection core facilities need to be focused on maintenance, regular inspection of dust bag, purification device operation status, timely cleaning of clogging, replacement of aging parts, to ensure that dust, exhaust emissions continue to meet the standards, to maintain the environmental performance of the Eco friendly asphalt mixing plant equipment.

Standardize Operation and Maintenance and Record Keeping

Operation and maintenance process should strictly follow the maintenance manual and operating procedures provided by the Eco friendly asphalt mixing plant equipment manufacturer, and use the appropriate tools and spare parts to avoid damage to the equipment due to improper operation. At the same time, you need to establish a complete operation and maintenance records, detailed records of each maintenance time, content, participants and other information, to facilitate follow-up analysis, optimize the operation and maintenance program.

Eco friendly asphalt mixing plant through multi-dimensional technology design, from the source to the end to achieve pollution reduction, the core measures are as follows:

Bag filter system for efficient dust removal

Bag filter is the core dust removal equipment, dust removal efficiency of more than 99%. Dust is intercepted on the surface of the filter bag, through the pulse airflow to clean the filter bag regularly, to ensure that the dust removal effect continues to be stable. Designed to use high temperature, corrosion-resistant filter bags (such as needle felt, coated fabrics), reasonable set of chamber switching valve and cleaning frequency, to avoid clogging of the filter bag; can be front cyclone dust collector, in advance of the removal of large particles of dust, to extend the service life of the filter bag.

Closed transportation and screening system

In the cold material warehouse, elevator, vibrating screen and other easy to produce dust parts of the installation of closed cover and negative pressure dust collection pipeline, in the dust to complete the collection of escaping before the pipeline will be introduced into the dust bag dust collector, from the source to reduce the dust leakage.

Ground dust reduction and dust suppression measures

Regularly sprinkle or spray the dust on the aggregate yard and roads of the production site, cover the transportation vehicles to avoid secondary dust, and further reduce the overall dust concentration of the site.

Specialized environmental protection design (ZOOMLINE case)

For the smoke and dust problems in the finished product loading process, ZOOMLINE environmentally friendly asphalt mixing plant is equipped with a blue smoke collection system and a closed loading receiving area, effectively preventing the leakage of smoke; the unloading area is equipped with additional dust adsorption device, which can efficiently purify the mixing of clear material, waste and asphalt fumes generated by the dust, to achieve the full link of pollution control.

Eco friendly asphalt mixing plant is not at the expense of efficiency to achieve environmental protection, but through technical optimization to achieve the double enhancement of environmental protection and efficiency, the specific logic is as follows:

Equipment and process optimization to improve efficiency

Through the configuration of high-quality drying drum and mixing machine, it realizes rapid and uniform heating of aggregate and efficient mixing of mixture, shortens the production cycle, and reduces energy consumption and production time; the automation control system can adjust the parameters according to the real-time production data to ensure that the equipment operates continuously and efficiently, which greatly improves the production efficiency.

Energy saving and cost reduction

Adopting direct-fired environmental protection burner and high-efficiency dust removal system to reduce fuel consumption and pollutant emissions, which not only reduces energy costs, but also reduces environmental protection and treatment inputs, and realizes cost optimization of the whole production process.

External factors to ensure stable efficiency

Production efficiency is also affected by the supply of raw materials, operator skills, equipment maintenance and other factors. Guarantee the quality of raw materials and supply stability, for operators and maintenance personnel to provide professional training, while regularly carrying out equipment inspection and maintenance, is to ensure the efficient operation of environmentally friendly asphalt mixing plant is a key addition.

In order to more intuitively reflect the core advantages of environmentally friendly asphalt mixing plant, the following seven core links to start the comparison, clearly showing the differences between the two types of equipment:

Cold aggregate feeding system

Traditional asphalt mixing plant equipment adopts open feeding design without dust removal device, and a large amount of dust leaks out when the aggregate is dumped, which is difficult to dissipate quickly;

Eco friendly asphalt mixing plant equipment adopts side window feeding design, and “dust curtain” is installed at the hopper, and at the same time, each hopper is equipped with a negative-pressure dust collection pipeline, which leads the dust into the dust collector, realizing that there is no leakage of dust.

Belt conveyor

Traditional asphalt mixing plant equipment conveyor is not closed, the aggregate is conveyed to the drying drum after vibrating screen, and the transportation process continues to generate dust;

Eco friendly asphalt mixing plant equipment adopts closed conveyor, the whole conveying path is wrapped, the screen is encapsulated as a whole, and a negative pressure dust collection pipe is set on the top to prevent dust from leaking out.

Bitumen supply system

Traditional asphalt mixing plant equipment bitumen tank for the horizontal design, no filtration device, heating asphalt produced by toxic fumes discharged directly, polluting the air and endangering human health;

Eco friendly asphalt mixing plant equipment, bitumen tank exhaust port installation of highly efficient activated carbon filtering bitumen fumes, tanks and pipelines covered with a thermal insulation layer to reduce heat loss and fumes escaping.

Mixing tower

Traditional asphalt mixing plant equipment mixing tower is completely bare, hot material lifting, weighing, mixing and other links are exposed, dust and noise continue to leak during the production process;

Eco friendly asphalt mixing plant equipment mixing tower fully enclosed design, isolated from dust and noise, equipped with wear-resistant noise reduction devices at the entrance and exit, vibrating screen sealed throughout the whole process, not only to reduce pollution, but also to reduce the noise of the equipment operation.

Charging workshop

Traditional asphalt mixing plant equipment charging workshop without shelter, hot asphalt mixture odor spread quickly, polluting the surrounding environment and affecting the health of personnel;

Eco friendly asphalt mixing plant equipment adopts fully enclosed charging workshop, the top set of negative pressure pipeline will be transported to the drying drum fumes decomposition, workshop equipped with dust removal pipeline, and at the same time the exit installation of automatic lifting door, to achieve environmental protection and clean production.

Powder recycling system

The old powder of the traditional asphalt mixing plant equipment is dumped from the dust collector outlet, and the dust is scattered around in windy weather, polluting the environment;

Eco friendly asphalt mixing plant equipment adopts the centralized storage design, humidifying and mixing the old powder and transforming it into mud or semi-mud, reducing the dust pollution; meanwhile, a negative pressure pipe is set at the top of the dust collection room, and the powder which is not fully humidified is introduced into the dust collector, and the old powder can be fully recycled and reused after humidification.

Dust removal

Traditional asphalt mixing plant equipment is only equipped with cyclone dust collector and bag dust collector to meet the basic environmental protection requirements;

Eco friendly asphalt mixing plant equipment dust removal system upgraded to increase the rotary recoil dust collector, dual-stage dust collector, offline dust removal and other designs, dust removal efficiency is higher.

Central control system

As for the central control system, the traditional asphalt mixing plant equipment is prone to overflow of hot aggregate, resulting in waste of resources;

Eco friendly asphalt mixing plant equipment adopts intelligent automation control, real-time monitoring of the amount of hot bin material through the weight sensor, automatically matching the cold aggregate, and the storage capacity of the hot filler bin tends to be close to zero at the end of the production process, which avoids a large amount of dust generated by the discharge of the remaining hot aggregates.

Production operation process

Traditional asphalt mixing plant can not eliminate excess hot aggregate, the production of material utilization is not high, resulting in a waste of resources, and obviously damage to the environment.

Eco friendly asphalt mixing plant adopt patented technology, environmentally friendly asphalt mixing plant has many highlights such as high metering precision, high degree of intelligence, low production and operation costs, high efficiency, high output, etc., with remarkable energy-saving and environmental protection effects. Aggregate measurement adopts small gate, small flow, decreasing measurement technology. The asphalt supply real-time tracking “oil-rock ratio”, the use of decreasing measurement method; these measures have greatly improved the dynamic measurement accuracy. Patented technology is adopted to solve the shortcomings of the traditional hot aggregate stack weighing time, shorten the mixing cycle, and greatly improve the output.In the noise-generating area of the equipment, noise reduction, sound insulation, vibration damping and other measures are taken to significantly reduce noise emissions.