OKTOP® vent gas scrubber

Fulfill environmental permits and achieve your emission targets. The OKTOP® vent gas scrubber minimizes the atmospheric environmental impact and reduces process losses, while ensuring worker safety - all at the same time.

Minimized environmental impact

Through cleaning harmful substances from exhaust gases, fulfulling government regulations, and preventing corrosion

Reduced product losses

By capturing valuable components from exhaust gases

Increased safety

Ensuring worker safety through proper cleaning solutions for residual chemicals and other debris

Sustainable gas scrubbing solution

The general purpose of Metso’s OKTOP^® scrubbers is to minimize the amount of emission that is released into the atmosphere. OKTOP^® scrubbers provides maximum efficiency in removing emissions from the processes. In some processes there is a large amount of vapor released. It is important to note that this is not emission as vapor consists mostly of water.

Additionally, the residual chemicals and other debris from the processes are cleaned promptly, preventing other subsequent equipment in the plant from scaling, corroding, and malfunctioning. Valuable components / chemicals are also recycled back to the process.

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Efficient gas scrubbing for lower emissions

The OKTOP® vent gas scrubbers are designed to scrub/wash exhaust gases containing chemical residues and contaminants from the hydrometallurgical processes before releasing to the environment. The scrubbers remove common contaminants from the gases including fine acidic liquid droplets, emission chemicals such as H₂S and SO₂, and fine dust particles, ensuring compliance with environmental regulations.

Reliable operation and optimized performance

The fundamental operating principle in OKTOP® vent gas scrubbers is straightforward. The scrubber operates with high-pressure nozzles that inject a cleaning solution—typically water or an alkaline solution with high pH—into the gas stream. As the gas to be scrubbed/cleaned penetrates through the cleaning solution, this creates droplets in which the contaminants become neutralized by the cleaning solution. After this, a lamella pattern droplet separator ensures any remaining residues are trapped before the cleaned gas is released.

Key operating parameters, such as nozzle pressure, nozzle angle and droplet size, are adjusted and optimized based on the characteristics of the inlet gas to be cleaned. Nozzle pressure is particularly critical in controlling droplet size, ensuring an efficient and effective cleaning with a minimal environmental impact.

Proven design and expertise

With its efficient contaminant removal, OKTOP® vent gas scrubbers unify scrubber selection with Metso's enhanced process design. Provided by experts with an established history of supplying reliable gas cleaning equipment, the OKTOP® vent gas scrubber provides a safe, reliable and energy efficient solution for optimizing gas cleaning in hydrometallurgical processing plants.

Our scrubber offerings

Metso offers a range of OKTOP® vent gas scrubbers designed for efficient gas cleaning in various industrial applications. Our scrubber solutions include four main types: Cascade, Venturi, Packed Bed, and Spray Chamber.

For enhanced flexibility, we also provide OKTOP® hybrid scrubbers, a unique combination of scrubber set-up. By combining the OKTOP® Venturi scrubber with either the OKTOP^®packed bed scrubber or OKTOP^® spray chamber scrubber, this leads to optimized performance.

Additionally, our OKTOP® Cascade scrubbers are available in both rectangular and cylindrical designs, making them ideal and flexible in Acid Mist Capturing System (AMCS) environments.

OKTOP® vent gas scrubber features

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We select the correct type of scrubber based on your process requirements, ensuring efficient gas cleaning. Hydrometallurgical process vent gas compositions vary, and the gases are formed in different kinds of equipment. Gases are formed in different hydrometallurgical equipment, such as:

Reactors
Thickeners
Filters
Autoclave
Flotation cells
Cell hoods
Other sources

Process scrubbers are selected for specific purposes, such as:

Solid particle separation
Droplet separation
Harmful component absorption (H₂S…)

Metso can supply the gas scrubber solution as a complete package for easy implementation on-site. The package may also be delivered as a containerized unit for swift installation with a high level of pre-assembly.

The main components of the vent gas scrubber package include: