Key Features

The hybrid design (water-tube front furnace, rear fire-tube) allows operation at low flue gas temperatures and high efficiency.

The water tubes that form the front furnace are produced as a membrane tube wall on an automatic tube – flat bar – tube welding machine, and are bent with high precision on an automatic membrane tube wall bending machine.

Thanks to the front-furnace design, combustion is completed fully and efficiently, which saves fuel.

According to the fuel type to be used in the boiler and the customer’s request, it is suitable for use with the following combustion system options: “Automatic Fuel-Feed Stoker“, “Water-Cooled Vibrating Grate” and “Manual Grate”.

With suitable combustion systems, wood, sawdust, coal, olive pomace, pellet, briquette, almond shell, walnut shell, hazelnut shell, fruit pomace, seed husk, poultry manure and pellet, bamboo, corn cob, forest residues and many similar fuel types can be burned efficiently and with low emission values. The fuel flexibility provided by the design of the combustion systems keeps operating costs consistently low.

Thanks to optional systems that allow unattended operation, such as “Automatic Ash Removal System“, “Automatic Ignition System“ and  “Automatic Tube Cleaning System“, efficient, stable and fully automatically controlled operation is achieved.

The flue gas filter selected to suit the fuel characteristics  (“Multicyclone“, “Cyclone“, “Wet Flue Gas Filter“,  “Bag Filter“) keeps emission values below the permitted limits.

A sufficient number of service doors, of suitable specification and insulated with concrete resistant to high temperature, are provided for maintenance and service.

 Combustion and emissions are controlled precisely and safely by means of the frequency-controlled, high-temperature-resistant, belt-and-pulley-driven flue gas fan.

Heating surfaces are net, actual values. The total of the areas inside the boiler where heat transfer takes place is stated net and correctly.

High-quality safety equipment provides safe and stable operation.

Thanks to the PLC-controlled touchscreen control panel, operation is straightforward, and remote access from mobile devices makes fast technical support available anywhere in the world.

It is supplied with long-life insulation that reduces heat losses to a minimum.

Manufactured in accordance with EN12952, EN12953 and the PED2014/68 CE directive.

Weld inspection on our boilers is carried out within the scope specified in EN 12953.

Boiler tubes are secured to the tube sheet with a tube expander and are then welded. This removes the risk of cracks in the welds caused by thermal stresses in the boiler tubes.

Our welded fabrication is carried out by our certified welders in accordance with approved WPS and WPQR. In manufacture, automatic submerged arc welding, MIG-MAG and SMAW are applied in accordance with the standards.

It is manufactured from high-quality certified boiler plate and seamless drawn steel boiler tube, in accordance with the requirements of the standards.

System Components

Akkaya hybrid-type hot water / high-temperature hot water boiler (water-tube front furnace, rear fire-tube)

Combustion system (automatic fuel-feed stoker, water-cooled vibrating grate, manual grate)

Boiler hot water flow / return valves

Boiler filling and drain valves

Boiler air vent valve

Boiler thermometer

PLC-based control panel with touch screen and remote access

Safety valve

Pressure gauge and three-way connection valve

Pressure switch

Pressure transmitter

Boiler temperature sensor (operation)

Boiler temperature switch (safety)

Flue gas temperature sensor 

Flue gas filter (multicyclone, cyclone, wet flue gas filter, bag filter)

 Frequency-controlled, high-temperature-resistant, belt-and-pulley-driven flue gas fan

Stack

Automatic ash removal system, automatic ignition system, automatic tube cleaning system, circulation pump group, expansion tank, rapid water heating tank, accumulation tank, plate heat exchanger (optional)