Stationary Asphalt Plant

Asphalt Mixing Plant

Description

The stationary asphalt plant is a kind of intermittent mixing plant. It adopts modular design and consists of feeding system, drying system, screening system, mixing system, powder recycling system, finished product storage system, etc., which makes it convenient to install and disassemble. New materials can be feed in the plant only after one batch of asphalt was already mixed up. With a large output, the plant is an ideal mixing system for road maintenance projects, building construction projects, water conservancy construction projects and so on.

Compared with the continuous mixing plant, the stationary asphalt plant has more processes including hot aggregate lifting, screening, secondary measuring and so on. At the same time, the quality and asphalt formulation can be controlled and adjusted at any time by the mixing plant.

Flow chart
Working process
Different sizes of aggregates are conveyed by belt to the screening equipment, then the bulk materials are removed, and the fine materials are transported to the drying cylinder through the belt conveyor.
The fine materials are heated and then lifted to the vibrating screen by the hoist. After screening, the materials of different sizes enter the corresponding hot material bin for use. Fine materials are measured in proportion according to the formula and then enter the mixing cylinder; meanwhile, the powder is measured from the powder bin and then spirally conveyed to the mixing cylinder.
The asphalt is measured and sprayed to the mixing cylinder to mix well with the aggregates and powder, and the finished product is produced.

Components

1. Cold aggregate feeding system
★ The belt is controlled by variable frequency speed governor and can be operated in the operating room, which is convenient and intuitive, providing a better adjusting precision of the operator.
★ Alarm devices are installed at each outlet of the system to inform the material shortage or material blockage in time.
★ Each inlet is equipped with screen mesh to avoid the entry of large size materials into the system, which not only saves fuel, but also effectively prolongs the service life of drying cylinder, hoist and vibrating screen.

2. Aggregate drying system
★ A negative pressure gauge is arranged at the smoke treating part of the drying cylinder, so the combustion system is always in the best condition.
★ Light oil or heavy oil is used as fuel. The dual ignition design makes the combustion stable and full.
★ The friction drive mode is driven by four motors simultaneously, which makes the driving stable and the noise small.
★ The cylinder shell is stainless steel with cotton rock material insulation layer added, which makes it has good oxidation resistance and corrosion resistance.

3. Aggregate screening and metering system
★ Aggregate adopts four-point structure sensor to measure the force, asphalt and powder use three-point structure sensor to measure the force. after the sensor signal processed by the electronic scale and computer, the weighing value will be digitally displayed.
★ The screen is made of high strength manganese steel, with an arch-like cross-section, high in the middle, slightly lower on both sides, which is beneficial to enlarge the contact area of material.
★ The drawer type design makes the screen convenient to replace.
★ The system adopts special structure to make the bearing always immersed in the oil and get sufficient lubrication, which greatly improved the service life of the bearing and reduced the failure rate.

4. Mixing cylinder
★ The liner and blade of the mixing cylinder are chromium alloy castings with high wear resistance, which guarantees the long service life of the mixing cylinder.
★ Asphalt is sprayed by the asphalt pump on the aggregate surface evenly for easy mixing.
★ External oil heater is added to the mixing cylinder to ensure the temperature of special materials, such as modified asphalt, rubber asphalt, hot recycled materials and so on.

5. Control system
★ Monitoring system: real-time monitoring of the main parts of the mixing plant.
★ The production data and formula can be preserved for a long time. daily production data and production graphs can be displayed, viewed and printed to facilitate understanding of the daily production situation.
★ The remote service system greatly shortens the maintenance time, improves efficiency and reduces costs.

6. Dust recovery system

★ Two-stage dust removal mode
The first stage adopts a volute dust collector or a cyclone dust collector, which collects large dust grains and sends them to the hot aggregate hoist by a spiral conveyer for reuse.
The second stage adopts a high-pressure pulse bag filter with compartmented chambers, whose high-temperature resistant filter bag is made in the United States. It has good air permeability and a dust removal rate up to 99.5%.

★ Other optional dust removal devices
Dust collecting devices under the mixing cylinder and product bin, dust shield over the conveyor belt. They can further reduce the environmental pollution caused by equipment.

7. Finished product storage system

Heat preservation:
The upper parts are covered with colored steel plate and the outer rock wool plate. The lower part is insulated by heat conducting oil, covered by the rock wool plate and colored steel plate. The door is insulated by electric heating.

Optional Asphalt Plants

Xuetao has had a presence in the asphalt plant industry for more than 40 years, we are confident to provide you unique asphalt plant solutions based on your applications. Till now, we have constructed many asphalt mixing plants used in different industries. There are some asphalt plant examples available for your choice, which can be equipped with pulse bag filter or Venturi scrubber upon request.

This mixing system needs to be customized according to the site conditions, mixing material types, and production requirements, so please contact us when customizing. We will send professional technicians to you and make customization plans according to your detailed needs.

With pulse bag filter adopted, this asphalt plant is a low noise mixing system whose highest noise is no more than 70 dB(A). Below we show some different cases that have been customized. you can either refer to these cases to provide ideas for your customization, or directly choose one from these solutions.

Maximum output	80t/h	Mixing capacity	1000kg/batch
Total installed capacity (excluding finished product bin)	280kw	Total floor area	35×30=1050m2
Maximum dust emission concentration	75 mg/Nm3	Fuels	Diesel, heavy oil and gas

Maximum output	120t/h	Mixing capacity	1500kg/batch
Total installed capacity (excluding finished product bin)	330kw	Total floor area	40×34=1360m2
Maximum dust emission concentration	75 mg/Nm3	Fuels	Diesel, heavy oil and gas

Maximum output	160t/h	Mixing capacity	2300kg/batch
Total installed capacity (excluding finished product bin)	430kw	Total floor area	45×36=1620m2
Maximum dust emission concentration	75 mg/Nm3	Fuels	Diesel, heavy oil and gas

Maximum output	180t/h	Mixing capacity	2500kg/batch
Total installed capacity (excluding finished product bin)	494kw	Total floor area	40×40=1600m2
Maximum dust emission concentration	75 mg/Nm3	Fuels	Diesel, heavy oil and gas

Maximum output	220t/h	Mixing capacity	3000kg/batch
Total installed capacity (excluding finished product bin)	628kw	Total floor area	60×40=2400m2
Maximum dust emission concentration	75 mg/Nm3	Fuels	Diesel, heavy oil and gas

AMP3500-C
Maximum output	260t/h	Mixing capacity	3800kg/batch
Total installed capacity (excluding finished product bin)	708kw	Total floor area	60×40=2400m2
Maximum dust emission concentration	75 mg/Nm3	Fuels	Diesel, heavy oil and gas

Maximum output	320t/h	Mixing capacity	4300kg/batch
Total installed capacity (excluding finished product bin)	820kw	Total floor area	60×40=2400m2
Maximum dust emission concentration	75 mg/Nm3	Fuels	Diesel, heavy oil and gas

Maximum output	400t/h	Mixing capacity	5300kg/batch
Total installed capacity (excluding finished product bin)	991kw	Total floor area	68×40=2720m2
Maximum dust emission concentration	75 mg/Nm3	Fuels	Diesel, heavy oil and gas

This asphalt plant uses Venturi scrubbers for dust removal. The maximum allowable dust emission concentration is 200 mg/Nm3, so coal can be used as fuel. If you have customization plan, please contact us. We will provide detailed customization design according to your requirements.

Here are some of the customized equipment. You can either refer to them to provide ideas for your customization, or simply choose one of these solutions.

Maximum output	40t/h	Maximum dust emission concentration	200mg/Nm3
Mixing capacity	500kg/batch	Finished product temperature	130-160℃
Total installed capacity (excluding finished product bin)	120kg/batch	Maximum ambient noise	85dB(A)
Total floor area	28×25=700m2	Ear noise	80dB(A)
Maximum oil consumption	6.2kg/t	Fuels	Coal, diesel, heavy oil and gas

Maximum output	50t/h	Maximum dust emission concentration	200mg/Nm3
Mixing capacity	700kg/batch	Finished product temperature	130-160℃
Total installed capacity (excluding finished product bin)	161kg/batch	Maximum ambient noise	85dB(A)
Total floor area	30×25=750m2	Ear noise	80dB(A)
Maximum oil consumption	6.2kg/t	Maximum dust emission concentration	Coal, diesel, heavy oil and gas

Maximum output	80t/h	Maximum dust emission concentration	200mg/Nm3
Mixing capacity	1000kg/batch	Finished product temperature	130-160℃
Total installed capacity (excluding finished product bin)	175kg/batch	Maximum ambient noise	85dB(A)
Total floor area	35×30=1050m2	Ear noise	80dB(A)
Maximum oil consumption	6.2kg/t	Maximum dust emission concentration	Coal, diesel, heavy oil and gas