Many years ago, when passing by a cement factory, we often saw the characteristic gray dust rising and spreading around its operating area… This article provides a basic perspective on cement dust pollution and related dust filtration solutions.
Hazards from cement dust pollution
- For the natural environment inside and outside the factory, dust that hangs on trees and natural plants will prevent their pre-photosynthesizing.
- Both humans and animals breathing cement dust and fine form dust (PM2.5 – particle size less than 3μm) suspended in the exhaust gas, are susceptible to respiratory diseases and lung diseases which are dangerous in the cement industry.
- Dust spreads very far by the wind, covers the sediment, pollutes the ground and water sources, and even damages the soil, degrading the flora.
Efforts to reduce cement dust
Over the past 10 years, with efforts to reduce environmental pollution, and change to dry rotary kiln cement production technology, dust at cement factories has decreased a lot, even close to zero. They fully owe to investment in efficient dust treatment systems, and safe, hygienic, and risk prevention production measures.
Cement production process
The typical cement production process can be summarized in 3 main stages:
- Raw materials (inputs).
- Clinker (the main component of cement).
- Some kinds of finished cement.
Observing each process, there are more detailed stages, from the mining area to the process of threshing, sieving, coarse grinding, extraction of raw materials and additives (limestone, clay, shale, fly ash, steel flakes, bauxite ore, gypsum,…), then creates calcium, silicon, iron and aluminum, the process of importing storage, Clinker crushing, clinker smelting, clinker cooling and grinding, dry wholesale grinding, clinker loading, cement storage and additive mixing, bagging of cement finished products, bag loading, transport vehicles,… All such stages are capable of spreading soil dust, cement dust, gypsum dust, additives and harmful substances, emissions, and energy consumption.
Cement dust treatment methods
In each cement production process and stage should have a system of dust and gas collection, as well as energy-circulating heat, … The coordinated methods of material dust handling can be customized, including:
- Dry dust filtration: a preliminary treatment method, through gravity deposition, inertia, and centrifugal rotation.
- Cyclone: large dust collection (particle size >5μm), in cyclone under the action of centrifugal force pushing the vortex gas flow.
- Fabric bags filtration: using a dust filter system through fabric bags with a pneumatic vibration device and mechanism, filter small dust and fine dust (>2.5μm) with high dust filtration efficiency (98 – 99%).
- Electrostatic filtration: collecting dust by electric field force, dust settles on the electrode surface, finally with vibration treatment. Dust particle size is as small as 0.1μm with very high collection efficiency, subject to exhaust gas temperatures as high as 500°C.
- Cartridge filter: using specialized filters to filter cement dust, antistatic and fireproof, shake dust with compressed air pulses, and collect nearly 99% of the dust.
Tan Thanh provides cement dust filtration solutions
With a team of engineers and workers with many years of experience and well-trained, supported by the world’s leading supplier of equipment and materials, such as GUTSCHE ALKEGEN, Tan Thanh Filtration Company specializes in providing a comprehensive solution for dust filtration, helping to collect dust generated as well as avoid a large amount of dust released environment, especially in the cement manufacturing and package industry.
Contact Tan Thanh Filtration
- Consulting, and designing all kinds of dust treatment and dust collection systems.
- Providing types of dust filter media: Filter bags and cartridge filters, which from different types such as heat-resistant and antistatic fabric, together with cage frames.
- Dust control valve equipment system, valve controller, air accumulator, differential pressure gauge, …
- Design and construct suction systems, pipes, exhaust fans, and exhaust gas pipes.
- Design and construct the entire system of bags, containers, ladders and operating floors, installed in modules, ensuring the ability to operate closed-in cement production and bagging plants.
- Survey of cement dust generation points and solutions to treat dust dispersion.
- Processing filter bag cage frames, sewing fabric bag dust filter bags, providing replacement of imported goods, and ensuring storage and maintenance requirements at cement factories.
With the motto: “Right Technique, Competitive, On Schedule, Professional Service”, we strive to achieve the long-term satisfaction and trust of our customers.
Please contact us for proper advice.
Nguyen Phuoc Thuan (Kelvin Nguyen)
Hotline: 0917531007 – Email: kelvin@tatafilter.com
Note: Please contact the hotline for appropriate consulting information. Any copy of the above content or images must have the permission of Tan Thanh Filtration Company by written document.
Reference
TECHNICAL SUPPORT:
- How to check the dust filter bag yourself to prepare for replacement
- Use the service to check and detect punctured filter bags (dust escape). Contact
- Can the dust filter system be improved or upgraded? Contact
- Coat the seam of the dust filter bag with glue – enhances the ability to filter fine dust. Contact
- Plan and steps to perform maintenance, cleaning, and replacement of dust filter bags
- Maintenance and cleaning of cement dust filter bags with elastic steel ring mouth
- Application of dust filtration in cement industry
- Cement factory dust filtration system
- Anti-static dust filter bag
- Polyester dust filter bag
- Cartridge filter tube
- Detonation devices, differential pressure gauges, joints, sensors, etc.
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