Eurotherm KTK (hand loading) solid-fuel boilers

KTK steel heating solid-fuel boiler, (further in the text – boilers) are intended for heating buildings and of residential, household and manufacture purpose constructions with up to 90 °C heat carrier temperature, with usage of anthracite, coal or wood in the capacity of fuel; as well as hot water supply, while using intermediate heat exchanger. Coppers can work both in open, and closed heating systems, with both forced and natural heat carrier circulation. The copper’s design allows you to use warm, which allocates in case of solid fuel combustion, to maximum effect. The copper’s exploitation is possible in solid fuel hand loading mode only.

TECHNICAL SPECIFICATIONS OF FUEL

– Antracite: combustion heat – 6700÷8000 kcal/kg, moisture percentage – 4÷5 %, ash content – ≤ 25%, ignitable volatile compounds’ egress – ≤ 9%. Benefits: high content of carbon (up to 95%), burns in case of strong draft without flame, flavorless and smokeless; high combustion heat that increases the new fuel portion laying interval; does not bake. Shortcomings – ignites badly.

– Black coal: combustion heat – 5000÷6700 kcal/kg, moisture percentage – 6÷12%, ash content – 15÷33 of %, ignitable volatile compounds’ egress – 4÷10 of %. Benefits: ignites well. Shortcomings: is able to bake depending on brand of coal; high exit of ashes.

Coal fuel briquettes – 5500÷7500 kcal/kg, moisture percentage – 10÷12%, ash content – ≤ 17%, ignitable volatile compounds’ egress – ≤ 9%. Benefits: ignites well, burns without smoke and releases no carbon monoxide; low exit of ashes.

Allowable fuel types and their specifications:

– Brown coal: combustion heat – 3000÷4100 kcal/kg, moisture percentage – 30÷45%, ash content – ≤ 45%, ignitable volatile compounds’ egress – ≥ 45%. Benefits: ignites well; does not bake. Shortcomings: exit gases’ high emission of gaseous and firm particles; low combustion heat; spontaneous ignition.

– Brown-coal briquette: combustion heat – 3900÷4500 kcal/kg, moisture percentage – ≤ 23,5%, ash content – ≤ 28%, ignitable volatile compounds’ egress – ≥ 50%. Benefits: ignites well; does not bake; resistance to spontaneous ignition in case of long-term storage. Shortcomings: exit gases’ high emission of gaseous and firm particles; low combustion heat.

– Peat briquette: combustion heat – 5500÷5700 kcal/kg, moisture percentage – ≤ 16%, ash content – ≤ 16%, ignitable volatile compounds’ egress – ≥ 50%. Benefits: ignites well; does not bake; resistance to spontaneous ignition in case of long-term storage; low exit of ashes. Shortcomings: low combustion heat.

– Fuel briquette (biofuel): combustion heat – 3850÷5000 kcal/kg, moisture percentage – ≤ 12%, ash content – ≤ 16%, ignitable volatile compounds’ egress – ≥ 10%. Benefits: ignites well; does not bake; resistance to spontaneous ignition in case of long-term storage; low exit of ashes; contains no harmful volatiles. Shortcomings: low combustion heat.

COPPER’S DESIGN

The copper’s case is welded from carbonaceous sheet steel and isolated by a layer of 50 mm thick mineral wool. The case consists of a furnace 2 and the convection pass. The flame products flow swirling turbulizer-screen 3 is located over a furnace 2. The fire-grate 5, and the opening grate 12 are located in the lower part of a furnace. The pallet ashes and slag collection 6 are established under fire-grate. The optimum air intake mode which provides complete combustion of fuel is selected by air gate 14 and chimney slide valve7 established in the chimney.

The loading 11, ignition and cleaning 13 doors where the axis draft air gate 14 is installed are located on the copper case ‘s forward wall. The indicating thermometer 10 is installed in the top part of the case connected with temperature sensor. The temperature sensor is located in the top part of a copper to the left.

The copper’s case is revetted with steel decorative panels. The sleeve pipe 9 with a gap closure for draft regulator connection is installed on the panel’s right side.

The chimney 4 and chimney slide valve 7 are located on the boiler case’s back wall. The heating system heat carrier submission branch pipe 8 is in the boiler’s upper part. The reverse submission branch pipes 15 are to the right and left side of a boiler. The given position creates convenience for boiler heating system’s mounting.