Gas Cleaning Plant – Wet scrubber technology
The Tenova furnace gas cleaning plant utilizes venturi scrubbers to clean furnace off-gas of particulate matter down to environmentally acceptable levels. Venturi scrubbers separate solids or liquids from a gas by scrubbing the gas stream to remove particulate. The scrubbing process uses water to trap the dust particles and thus clean the gas. The scrubber water containing the dust particles is normally cleaned and re-introduced into the scrubbing cycle.
Overview
Tenova Pyromet is a leading designer and supplier of high-capacity electric submerged-arc smelting furnaces and complete smelting plants for the production of ferroalloys, base metals, slag cleaning and alloy refining.
Technical data
- Ergonomic design.
- Large-diameter nozzles to prevent blockages.Low water pressure design.
- Maintenance friendly.
- Single or two-stage venturi design, depending on dust load and particle size.
- Guaranteed emission levels of less than 25 mg/Nm3.
Innovation
In addition to the regular wet scrubbing technology, Tenova developed the Dry Scrubber offgas cleaning technology. The Tenova Pyromet patented dry scrubbing process & method is an alternative solution to wet scrubbing systems for cleaning the furnace off gases from furnace processes, where low or high volatile reductants are used. It uses a separation technology, whereby solids are collected and separated from the process gas, by passing it through high temperature filtration elements that are periodically cleaned by using an inert gas.
The resultant cleaned CO gas average solid gas content is below 5 mg/Nm3and is suitable for direct use used in any power generation or heating system.
If high volatile reductants are used, the hot gas with tar in vapor form passes through the separation section for cleaning, before entering a suitable tar removal system, prior to being used in any power generation or heating systems. The collected tars from the tar removal systems can be used as a fuel or can safely be disposed of.
Automation
Control of the gas cleaning process is achieved using advanced automation, as developed by Tenova with input and collaboration from the customer.
Environment
Tenova uses cutting edge technology to ensure that environmental protection and compliance with legislation are integrated into the design of each gas cleaning plant. Tenova furnace off-gas scrubbers used with closed furnaces ensure that gases from smelting processes are cleaned of particulate matter before the cleaned gases are vented to the atmosphere.
Digital
Tenova’s Gas Cleaning Plant auntomation system is designed for real-time precise process/operation and monitoring.
South Africa & RoW
Andre Esterhuizen
General Manager - Sales and Marketing, Tenova Pyromet
