KWM-SP central heating furnaces make up new generation of heating furnaces fired with solid fuel. These are low-temperature, water, steel heating furnaces, designed for burning fine coal or eco pea coal type II of particles size from 5 to 25 mm. It is recommended to use dry fuel. The highest calorific value the better heating effect. It is recommended to use fine coal of decreased expanding properties, decreased sinterability and high ash melting point.
KWM-SP heating furnaces are characterized by low emission of deleterious substances proved by suitable approvals. They were granted an ecology attestation and conformity certificate with standard PN-EN 303-5 issued by the Institute of Chemical Processing of Coal in Zabrze. Main feature of this kind of heating furnaces is modern solution for automatic drawer feeder unit with fuel feed hopper which gives the possibility of burning several kinds of fuel. Feeder unit and the process of burning is controlled by microprocessor-based regulator. Automated way of feeding fuel directly to the grate with appropriate amount of air blown into the furnace make that this heating furnace is distinguished by high heating efficiency. Additional advantage of drawer feeder unit is quiet operation.
For covering actual demand for heat, only appropriate amount of fuel is being burned on the grate made of cast-iron. Solid combustion products, such as ash and ash slurry, are being forced down to ash pan automatically when feeding following batch of fuel. Heating furnace is equipped to grate for traditional burning which must be taken out during automated operation. Heating furnace has a cuboidal design and was made of high quality approved steel. Elements are being fused together using technique of hot gas welding and joint one to another with bracing staybolts creating water space between walls.
Body of the heating furnace consists of furnace part and convection part. In the bottom part of the body there is a furnace with grate, underneath there is a blown-in air chamber and in the rear bottom part there is a tray for storing ash. Air for the furnace is being supplied by fan through grate made of cast-iron. Convection part consists of channels that enable combustion gases flow from combustion chamber to flue and smoke conduit. Combustion gases are being brought up to the chimney through smoke outlet which is located in the upper rear part of the heating furnace.
Fuel is being dumped into fuel container and then fed by feeder unit (propelled by motoreducer) to the furnace. Ash is being pushed out by fresh fuel outside of the furnace into ash pan.
KWM-SP central heating furnaces are to be mounted according to standard PN-91/B-02413 and BN-71/8864-27 regarding protection heating water devices in open system and collecting vessels in open system.