Low emission combustion

More than 3,200 POLYTECHNIK plants have already been built worldwide. Below, we would like to present some of these plants to you.

Low emission combustion

More than 3,200 POLYTECHNIK plants have already been built worldwide. Below, we would like to present some of these plants to you.

POLY H.E.L.D.® is the combustion technology of the future. This combustion system with extreme air staging allows for low-emission and efficient combustion of various fuels. Dust emissions for wood-based biomass remain lower than 20 mg/Nm3  at 11% O2. A value of 10 mg/Nm3 can be reached with quality wood chips. Additionally, POLY H.E.L.D. is able to combust or gasify high-ash fuels with relatively low ash melting points. The system accomplishes these low emission values without additional flue gas purification, which makes it a highly economical solution. As a unique design, this system achieves a 20-30% lower NOx emissions compared to grate firing without the need for secondary measures (SNCR or SCR).

Fuel is supplied via an inclined screw stoker. The fuel height is controlled by a redundant radar system. The produced gas is initially ignited by a propane gas burner with a nominal output of 35 kW. The gasifier is ignited automatically by a hot-air blower. 

The grate is a gasification grate, specifically developed by POLYTECHNIK for this gasification technology. The new grate is aligned symmetrically below the gasifier and is cleaned of ashes simultaneously to the left and right. In this process, the ash is discarded onto two horizontal screws at both ends of the grate and from there it is transported to another horizontal ash screw which transfers all of the ashes to an air-tight container.

The grateThe grate is a gasification grate, specifically developed by POLYTECHNIK for this gasification technology. The new grate is aligned symmetrically below the gasifier and is cleaned of ashes simultaneously to the left and right. In this process, the ash is discarded onto two horizontal screws at both ends of the grate and from there it is transported to another horizontal ash screw which transfers all of the ashes to an air-tight container.

OPERATING PRINCIPLES LOW EMISSION BURNER

  1. INLET
  2. FUEL BED
  3. GASIFIER GRATE
  4. ASH REMOVAL
  5. HEAT EXCHANGER
  6. SPECIAL LOW-NOx BURNER

Brochure

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You want to know more about our plants and your possibilities?

Call us at +43 2672 890-0, write an email tooffice@polytechnik.at or use the following contact form


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