RTO (Regenerative Thermal Oxidizer)
06 Aug, 2018 / 1420 Views
RTO is energy-saving system that oxidizes and decomposes VOCs (Volatile Organic Compounds) at 850°C or higher.
It is suitable for the treatment of high concentration gases and for use as a post-treatment unit to Admat.
RTO: Regenerative Thermal Oxidizer
key features
Durable & thermal-efficient deodorization system with ceramic heat storage material
A ceramic medium is packed as a heat storage material in the heat exchanger.
Our ceramic provides the benefits of high durability, thermal efficiency and low pressure loss.
The thermal efficiency is adjustable from 85% to 95%, allowing minimized energy consumption and requiring little supplemental fuel to deliver the greatest impact in energy savings.
With the target exhaust gas highly concentrated, by installing a waste heat boiler, heat can be recovered as stream and hot air, a heat medium.
Sustained 98% or higher treatment efficiency for exhaust gas
RTO's standard heat exchanger consists of two towers, with a heat storage material packed in each.
A target gas goes through the heat storage material in one tower and is heated to about 750°C, it then enters the reaction chamber in the upper part of the tower, where the gas is heated to 800°C or higher by a burner so that organic solvents contained in the gas are oxidized and decomposed. The cleaned hot air then flows into the other tower, moving down while releasing heat into the heat storage material. The damper at the intake repeatedly switches the operation between heat storage and release within the two towers.
With its consistent operation and with a treatment efficiency of 98% or higher, the RTO system is extremely useful for environmental measures.
Applicable to environmental measures for exhaust gases in safety assessment testing
RTO has been applied to total systems including exhaust gas and water treatment.
How Does An RTO Work?
An RTO consists of two or three towers which contain specialized thermal ceramic material, connected at the top by a high-temperature combustion chamber and direct-fired burner.
RTO Operation
The basic operation of a Regenerative Thermal Oxidizer consists of four basic steps:
- 1.Heating:Industrial process exhausts carrying VOCs & HAPs are passed through a heated ceramic material in one tower, heating the gas up to ~1300°F.
- 2.Incineration:A natural-gas fired burner raises the air stream temperature from 1300°F to ~1450°F, thereby oxidizing all complex carbon solvents into CO2 and water vapor.
- 3.Recovery:The super heated gas is passed down through the second tower, which contains the same heat sink ceramic material, and recovers a majority of the heat from the burner.
- 4.Purge:Only in the 3-tower design, the third tower purges a small amount of air into the combustion chamber to prevent any exhausts from escaping.
As the first tower cools and the second tower heats up, the direction of the air through the towers reverses periodically to recover the heat from the RTO burner.
Regenerative Thermal Oxidizers (RTOs) (see "TKS Industrial Company")
