Lime Dosing Rig to contain contaminants

Date Published : 2 Aug 21

Do you suffer with pollutants from waste incineration?

ISSUE

Waste incineration, along with many other industrial processes, generate flue gases. These often contain pollutants such as sulphur oxides (SO₂ + SO₃), nitrogen oxides (NOx), hydrochloric acid (HCl), hydrofluoric acid (HF) together with heavy metals, dioxins and furans. Lime, hydrated lime and limestone-based products are highly efficient reagents for capturing these contaminants and when mixed with other components, will also remove so-called micro-pollutants.

SOLUTION

The dosing rig is designed to pneumatically convey hydrated lime into existing flue gas ducts:

• Big bags of hydrated lime are loaded onto the discharge hopper using a fork lift truck or electric chain hoist versions.
• A ‘Flo-Choke’ mechanism, prevents premature release of lime until the operator has closed the door and released the choke.
• Below the discharge hopper is an inverter controlled, micro screw feeder that regulates the lime being dosed.
• The dosing rig is supplied with load cells, providing complete speed control of the micro screw feeder.
• The rate of discharge for the hydrated lime is determined by the existing gas monitor. This signal will determine the dosing rate of hydrated lime, which is regulated by the rotational speed of the micro screw feeder. Guaranteeing the correct quantity of lime is conveyed to the flue gas duct in order to manage the emissions and avoid overdosing .
• If gas monitors do not exist, the rig can be supplied without load cells and the speed of the micro screw feeder can be set at a constant volumetric rate.
• The dosing rig is designed to operate between 5-500Kgs/hour depending on system requirements.

BENEFITS

The Ingredient Batching Systems lime, hydrated lime and limestone-based products are highly efficient reagents for capturing contaminants and when mixed with other components, will also remove so-called micro-pollutants.

• Bug bag handling
• Continuous loss in weight
• Smart system performance
• Pre-assembled and wired
• Quick installation