New dust burner: Unique system solution for special customer requirements

The Düsseldorf mill specialist Loesche was on the look-out for a dual-fuel burner system to fire lignite dust and heavy oil for a dryer plant. The problem thereby was, however, the characteristics of the coal dust which deviated in its chemical composition from the usual characteristics. First of all, a firing test was carried out at the Körting dust burner test facility to ensure the technical feasibility of the project.

The flame of the dust burner.
The flame of the dust burner.
The specifications of the lignite dust are taken into account in this firing system.
The specifications of the lignite dust are taken into account in this firing system.

“By means of the results we were able to adjust the firing system specifically to the fuel requirements“, as Dr. Benedikt Roberg stated. So therefore nothing stood in the way of realising this project. “No other manufacturer of dust burners has comparable possibilities“, reported Dr. Benedikt Roberg. Indeed, here problematical fuels can be tested in the test facility with regard to the suitability for generating heat. “Only so can we offer our customers the security of our adherence to the required firing system characteristics.“

Successful Mutual Project

The project was processed and developed by Hans Hennig GmbH in collaboration with Körting Hannover AG. The Körting experts supplied the necessary know-how and the required equipment to construct and test the dust burners. In this combination, Hans Hennig GmbH offers the possibility of contributing a sophisticated special manufacturing in the sectors of automation technology and fuel supply systems. So the burner and the dust dosing unit were manufactured by Körting Hannover AG, the switching unit and the heavy oil pump station with heavy oil pre-heater by Hans Hennig GmbH in Ratingen.

Supply train for heavy oil: Automatic fuel switch-over
Supply train for heavy oil: Automatic fuel switch-over
This is where the brown coal dust dosing takes place.
This is where the brown coal dust dosing takes place.

Bundled competencies

The project was started in cooperation with Körting Hannover AG. Körting supplied the necessary know-how and equipment to build and test the dust burner. Hans Hennig GmbH contributed the sophisticated special production in the field of automation technology and fuel supply systems. The burner and dust dosing system were manufactured by Körting Hannover AG, while the switchgear and heavy oil pump station with heavy oil preheater were built by Hans Hennig GmbH in Ratingen.

This once again demonstrates the strength of Hans-Hennig/Körting-Technik in the niche of developing tailor-made products according to customer requirements and with bundled competencies. The mill specialist Loesche from Düsseldorf was very satisfied with the professional handling of the order.

At a glance

Application firing system for hot gas generation

System components: Dual fuel burner, combustion air supply, dust dosing, heavy oil pump station with oil preheater, switchgear with on-site control and power control cabinets

Combustion heat performance

dust/heavy oil:

17,000 kW

control ratio:

1:5 for dust

Dust consumption:

2,800 kg/h

Heavy oil consumption:

1,600 l/h

Excess air:

1.5 - 2.0

Air supply:

34,000 Nm³/h

Firing manager:

FMS 5 with electronic compound

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