About Gas Emissions
What kind of technology can my company use for gas emission treatment?
Depending on the type of emissions you need to treat, your company may use Regenerative Thermal Oxidation technology, Regenerative Catalytic Oxidation, Scrubbers, Catalysers, Active Carbon Filters, etc.
What kind of gases can be treated with RTO technology?
Regenerative Thermal Oxidation (RTO) units are designed to treat Volatile Organic Compounds (VOC) emissions and solvents derived from the industry production processes. RTO technology best suits air volumes from 1,000 to 100,000 m3/h, with medium to high solvent concentrations, to treat a wide range of solvents.
What kind of gases can be treated with RCO technology?
Regenerative Catalytic Oxidation (RCO) units are designed to treat Volatile Organic Compounds (VOC) emissions and solvents derived from the industry production processes. RCO technology best suits air volumes from 1,000 to 30,000 m3/h and low to medium Solvent concentrations
Can I treat all gases with RTO technology?
RTO technology is designed to treat specifically Volatile Organic Compounds (VOC) and solvents derived from the Industry production processes.
How does RTO technology work?
Usually, Regenerative Thermal Oxidiser (RTO) equipment consists of a 3-tower unit, which allows sequencing in 3 stages for proper functioning.
In phase 1, the gas stream to be treated enters into the first tower, gets oxidized in the combustion chamber and passes on to the second tower. The third tower is a brief purge to avoid that not-yet-treated gas may go out of the chimney.
In Phase 2, the gas flow to be treated enters into the second tower (in the previous phase the second tower produced the treated gas outlet), then the oxidized gases in the combustion chamber exit through the third tower (where in phase 1 purge was performed) and the first tower is a brief drain (in the previous phase, it was the tower where the gas entered to be treated).
In the tower where there is the inlet gas during any stage, is where the purge should be at the next stage, to avoid untreated gases out the chimney. Without the purge process, there might be the possibility that gases that have entered the RTO but that have not passed either by the bed ceramic or, more importantly, through the combustion chamber, may be released into the atmosphere through the chimney with levels of VOC’s above the maximum permitted.
The purge is done for a short time and does not last throughout the phase of the process. To avoid problems of VOC emission into the atmosphere, please wait to allow gases that occupy the tower area that are below the combustion chamber to go out.
In phase 3, the gas flow to be treated enters the third tower (in the previous phase that tower produced the treated gas outlet), then the oxidized gases in the combustion chamber exit the first tower (where in phase 2 the purge was performed) and the second tower is a brief drain (in the previous phase the gas entered here to be treated).
The reason to make the entrance through the tower where the operation was carried out is the use of latent heat of the ceramic bed, which results in significant thermal efficiency. On the way out, treated gas transmits the heat to the bed ceramic, reducing its temperature at its turn. In the next phase, the gases pass through the ceramic bed, which in the previous phase was heated with exhaust gases.
Ideally, there should be those 3 steps to create a loop (phase 3 would give way to phase 1) along the entire process. However, for optimum performance, the RTO can handle phase changes through the programming and control system, and based on sensors with embedded.
In addition to those phases, the RTO has a bypass connecting the computer directly to the chimney (called “hot bypass”). When the temperature of the combustion chamber reaches values above 800º C, the valve opens and allows treated gases to go out through the chimney into the atmosphere, without having to go through the floor tile in one of the towers to avoid problems by excessive temperature, which could damage the ceramic bed.
How does RCO technology work?
Usually, Regenerative Catalytic Oxidiser (RCO) equipment consists of a 2-tower unit, which allows sequencing in 2 stages for proper functioning.
In phase 1, the gas stream to be treated enters through one of the two towers (for example, the tower on the left). That gas gets oxidized in the combustion chamber and finally passes on to the other tower (the one to the right) and is it issued into the atmosphere through the chimney.
In phase 2, the treated gas stream enters the tower on the right (previously this tower was the out-tower for the treated gas), gas gets then oxidized in the combustion chamber and goes out through the tower on the left into the atmosphere (in Phase 1 it was the in-tower).
The reason for using that work cycle alternation is taking advantage of the ceramic bed heating properties, which allows a significant thermal efficiency. The air flow, while going out along the ceramic bed, heats up the ceramic, reducing its own temperature. In the next phase, cold gases coming from the production process pass through the ceramic bed, which had been heated in the previous phase with exhaust gases. Thus gases are preheated and gas consumption in the combustion chamber burner decreases significantly.
In addition to these phases, the RCO has a bypass that allows fresh air into the combustion chamber (called “Hot Bypass”). When the temperature of the combustion chamber reaches values above 500ºC, the valve opens and allows fresh air to reduce the chamber temperature and avoids any problems due to excessive temperatures that may damage the catalyst.
About Waste Incineration
What kind of technology can my company use for gas emission treatment?
During Incineration process, waste is oxidised at high temperature thanks to the oxygen action, which allows combustion. For complete security, incineration equipment have several filtration phases: the first one, in the secondary incinerator chamber, called “gas washing” or “post-combustion”, works at 1,100 ºC and is a vital part of the incinerator. Then an injection of sodic bicarbonate and another one of active carbon is made. Gas, which has become already cooler, goes to a fabric filter, where solid particles are retained, and after that, an ammonia solution is injected. All that process guarantees the proper emission control of odour, VOC’s, combustion gases and heavy metal, for a proper functioning and a final result safe for people and the environment.
Is Incineration accepted as a Waste Valorisation method?
Waste valorisation is a common and necessary practice to treat, recycle and give a new value to waste coming from human and industrial activity. Incineration is a type of valorisation that offers safe results and advantages, which makes it ideal for municipal and industrial waste. Still, there are some concerns about Incineration, due to it being a partly unknown valorisation method and due to some suspicious practices carried out in the past.
However, since European EU 2000/76/CE Directive from year 2000, waste incineration undergoes the strictest and more demanding controls. As it is such a controlled valorisation method, it is an efficient solution for waste treatment, safe for people and the environment, and is very widely used in many countries.
What advantages does Waste Incineration have?
Incineration is a safe valorisation method that treats solid and liquid waste in an efficient, controlled way, eliminating waste and generating only up to 3% of ashes. Apart from that, it does not generate any other waste. That, together with the fact that it undergoes the strictest and more demanding controls, makes Incineration ideal for municipal and industrial waste treatmen
EU Environment Legislation
- EU Commission – EU Air Policy: http://ec.europa.eu/environment/air/review_air_policy.htm
- EEA European Environment Agency: http://www.eea.europa.eu/themes/air
- IES – JRC (Institute for Environment and Sustainability – Joint Research Center): http://ies.jrc.ec.europa.eu
- Diréction General for Climate Action: http://ec.europa.eu/clima/news/index_en.htm
- Directive 2008/50/EC on ambient air quality and cleaner air for Europe including the following elements
- Council Directive 96/62/EC on ambient air quality assessment and management (Air Quality Framework Directive)
- Council Directive 1999/30/EC relating to limit values for sulphur dioxide, nitrogen dioxide and oxides of nitrogen, particulate matter and lead in ambient air (First Daughter Directive).
- EU legislation on Waste Incineration (Directive 2000/76/EC) http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CELEX:32000L0076:en:HTML
Where/How Can I buy Tecam Group environment technology equipment?
You can contact us by one of the following means, and a member of our Sales team will get in contact with you as soon as possible:
Phone: +34 93 428 11 54
(Languages spoken: English & Spanish)
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