Afterburners / Thermal Oxidizers

Reliable and sustainable solutions for VOC removal

NUTEC Bickley Thermal Oxidizers

NUTEC Bickley designs and manufactures a range of Thermal Oxidizers, also which called Afterburners, are used to remove Volatile Organic Compounds (VOCs) from a kiln exhaust stream to ensure emissions meet environmental regulations. As they destroy the VOC there is no further treatment required.

Design is specific to the compounds released but Time, Temperature and Turbulence must be present to ensure that oxidation is complete. Correct control of these variables as well as excess air levels (≥ 3% O) can ensure that VOC levels can be reduced by 99.99%.

Shuttle Kiln Afterburners

When an afterburner is used on a shuttle kiln in needs to be designed and sized carefully to be sure to remove the organic volatiles during the specific times that they are released from the product.

The afterburner normally operates at 700°-1000°C and it is important that the retention time in the afterburner is enough to remove the organics to the required level.

The process often starts slowly as soon as the kiln temperature starts to increase; it reaches a peak between 300°C and 500°C and then reduces until all the organics are removed by 700°- 800°C. In a shuttle kiln it is now possible to turn off the afterburner to save fuel.

As the energy needed heat the exhaust to the required temperature is high, NUTEC Bickley often include a heat exchanger to pre heat the exhaust flow and also to capture as much waste heat as possible for pre heated combustion air for both the kiln and the afterburner. This heat recuperation improves the overall efficiency of the system.

Tunnel Kiln Afterburners

When an afterburner is used on a tunnel kiln the product in the kiln reaches the off-gas temperatures more gradually instead of all at once, but the total product volumes are usually larger.

The system can be designed to exhaust at higher temperatures but often this is less effective than to use a heat exchanger to preheat the exhaust gases as they leave the kiln but before they reach the afterburner as the hot side of the heat exchanger is fed from the afterburner exhaust.

Special burners with reduced external air supplies can be used in tunnel kiln afterburners as there is usually enough Oxygen in the exhaust gases to complete the combustion. The focus with all afterburners is to reduce fuel usage whilst maintaining acceptable emission levels.

Key Features

Designed with the kiln to ensure maximum efficiency and destruction efficiency
Used in conjunction with Heat Exchangers to increase efficiency and reduce energy costs
Control systems to ensure afterburner only operates when it is required

Vertical or Horizontal afterburners are available to fit all areas
50 years’ experience supplying afterburners to many applications
Supplied with test points to ensure Environmental Compliance

Technology

ECOmbustion™

NUTEC Bickley’s proprietary ECOmbustion™ system is an innovative control methodology designed to achieve fuel savings in gas-fired kilns, bringing operating costs down and reducing carbon footprint.

Learn more about ECOmbustion™

Related Industries

Continuous Casting Refractories
Refractarios Monolíticos

Related Processes

Firing
Sintering
Tempering
Burn Out
Oxidizing

This is Nutec  Bickley

Providing Thermal Equipment Solutions that go beyond expectations

We serve multiple industries through the design, building and installation of combustion systems, thermal insulation and highly specialized industrial furnaces, kilns and ovens. We are focused on understanding our customers’ needs and supplying the best equipment at the most competitive price. 

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