PRZEDSIĘBIORSTWO TECHNIKI CIEPLNEJ

PL. 44-100 Gliwice, ul. Wrocławska 24, skr. Poczt. 125A

www.piecoserwis.com.pl e-mail: piecos@piecoserwis.com.pl el. (032) 238-26-59, 230-28-18, 230-21-37, fax (032) 231-48-06

PN-EN ISO 9001: 2009

PN-EN 18001:2004

PN-EN ISO 14001:2005

Certyfikat Nr PL-JBS-188/1/2011

Spółka z o.o.

PI-4 REGENERATIVE THERMAL

AFTERBURNER

Thermal afterburner

Thermal burning i a widely known method of the disposal of gasous pollutants. This device belongs to the set of burning system based on exhaust gas energy recovery by using the regenerator. It allows to obtain the thermal efficiency not available in case of using the recuperator . Also it enables to have a very economical use of the afterburner even in case of large gas streams containing low concentrations of pollutants. After heating the combustion chamber and regenerators, the afterburner consumes very low amount of additional fuel or it becomes self-sufficient.

Ventilation air

In coal mines two different types of methan emmisions to the atmosphere occur. The major one is ventilation air. Both methan and ventilation air create mixtures containing from 0,0 to 0,75 of methan. Methan ventilation in Polish coal mines is estimated at about 600 mln m3/a year, when the calorific value CH4 is -355mj/m3 we are gaining the huge amount of wasted energy – 21 mln gj/a year. Unfotunately the energy is not easy to gain. Despite the fact that the output and the number of coal mines are being reduced, methane emissions value is constantly growing year by year. It is also worth mentioning that methane is a greenhouse gas.

Technical parameters

- Efficiency: 5 000 ÷ 100 000 Nm3/h - Efficiency of regeneration (TER): ~95% - Efficiency of afterburning (DRE):

>= 99% - Types of pollutants: methan CH4 - Inlet temperature: 30°C - Estimated outlet temperature: 70°C - Devices are designed so that energy

self-sufficiency is followed at a nominal concentration of pollutants in combusti-ble gases

- Afterburning temperature: 800 ÷ 1000˚C - Measurements: 8m x 5m x 8m

(d x s x w) - controlling: automatic – PLC controller

Przedsiębiorstwo Techniki Cieplnej

Sp. z o.o. 44-100 Gliwice ul.Wrocławska 24

www.piecoserwis.com.pl, e-mail:piecos@piecoserwis.com.pl

- 2 -

The afterburner construction

Principle of operation

1. The inlet gas stream heats up on contact with the first regenerator which was heated in the previous cycle. 2. Warming the gases to the temperatures close to the one in the afterburner. Next, the gases are warmed with the additional burner (if necessary). 3. Practically, complete combustion pollutants is achieved through the adequate residence time of these compounds in high temperatures and turbulence. 4. Referring the afterburned gases to the second bed regeneration, where the heat generated from the first regenerator, the gas burner and the energy combustion pollutants, is given away. 5. The reversal of gas flow. Each phase of working is presented at the diagram next to the text.

ZO OZ

R R

1000 C1)

OZ ZO

R R

1000 C2)