Gas Treatment Solutions

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Gas treatment solutions

Cement plants are now facing an increasing number of environmental regulations with tougher pollutant emission limits. Various polluting emissions such as particulates, SO2, SO3, NOx, HCl, HF, Hg and Dioxins/Furans can be released to the atmosphere during grinding and pyroprocessing operations.

To help its customers face these emission reductions, Fives designs and supplies high efficiency gas treatment systems to clean the exhaust gases throughout the plant.  Fives' equipment use the latest technology in filtering and scrubbing to achieve removal efficiency in order to meet the most stringent environmental regulations.

From supply only to full turnkey solutions, Fives can help cement plant meet their environmental permits without affecting production.


Dedusting solutions

Fives' Dust Control solutions consist in proprietary baghouse filters, designed to remove particulates out of air or gas released from industrial or combustion processes. With more than 60 years experience in designing and manufacturing bag filters for the biggest players of the industry, Fives can provide the most reliable and efficient systems on the market.

With more and more stringent local regulations and a global awarness about dust emissions, Fives's filtration technologies improved constantly to combine high efficiency, low footprint and optimized air consumption.

TGT® and Sonair™ Filters advantages include:

  • the lowest Can Velocity of the market for the best gas/dust distribution
  • the soft landing technology to prevent the snap-back effect and preserve the bags
  • bags from 2,5m to 10m to fit every situation with the most compact solution
  • leak detection and localization for maintenance efficicency and the best environmental results
  • no-tool maintenance design inside the clean air plenum for fast maintenance operations
  • Smart Data monitoring for baglife optimization and iar consumption control
  • modular design for an extremely low mounting time

SOx Control solutions

SO2 and SO3 can have major impact on human health, even at low concentration. Condensation of acids in the atmosphere leads to acid rains. That's why now most countries apply SOx regulations and bring industries on the way of emission reductions.

In cement burning lines, SOx come either from raw materials (pyritic sulfur) or from combustion fuels. Although most of the emitted sulphur is absorbed by limestone and quickline within the burning process, some emissions can still occur at the stack and must be taken down. SOx final removal can be achieved by using hydrated lime.

Fives address every step of the SOx path in order to design the best removal solution, considering the following key factors:

  • mill on / mill off conditions
  • fuel mix conditions
  • SOx cycles within the process
  • gaz temperature and composition through the process (from kiln to stack)
  • bypass system

As a process expert, and depending on process conditions and plant configuration, Fives proposes the best solution for dosing and injecting the right quantity of hydrated lime at the right point.

NOx Control solutions

NOx emissions in cement plant are mainly made of NO emissions and very few NO2 emissions. Two kind of NOx are produced during pyroprocess operations : "thermal NOx" resulting from high temperature and air excess at the burner and "fuel NOx" coming from the nitrogen present in the fuel at the precalciner's level.

As a process expert, Fives designs the rigth solution for NOx control and reduction, combining primary and secondary technologies.

Mercury Control solutions

Mercury emissions are highly versatile and require a close control. In cement plants, Mercury has multiple cycles and faces, whether condensate, particulate or gaseous, whether elementary or ionic. Different solutions are then used to trap it but finding the right solution to remove it from the process requires a great expertise. Thanks to their expertise, Fives engineers design the most suitable combination for Mercury control at cement plant.

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