Boiler Retra-4M Trio 200 kW

Boiler Retra-4M Trio 200 kW

Purpose

Heating boilers with a maximum water temperature of 95 °C and an operating pressure of up to 0.2 MPa, with microprocessor regulation of the coolant temperature, forced adjustable air supply and automated fuel supply to the combustion chamber (if necessary, can be switched to manual fuel loading mode) - are designed for heat supply to individual residential buildings and public utility buildings equipped with heating systems with forced (closed heating system under pressure) or natural (open heating system) circulation of the coolant.

Operating principle

The Retra-4M boilers can operate in two modes: manual and automatic fuel loading.

In the boiler's first operating mode, fuel (wood, coal, briquettes, etc.) is loaded through the loading hatch. Efficient combustion in the firebox is achieved through an intensive air supply around the perimeter of the chamber, creating an "air cocoon" around the fuel. Any gas that doesn't burn in the firebox due to insufficient air is further combusted by the supply of secondary air. This ensures a high efficiency of up to 93%.

In the second mode, fuel is loaded automatically from the hopper via a screw conveyor (driven by a gearmotor) to the pellet burner. Maximum efficient fuel combustion in the pellet burner is ensured by air flow provided by a fan. Operation of the screw conveyor and fan is controlled by a microprocessor-based thermostat.

Advantages:

• Two fireboxes: the upper one for burning large-sized raw materials, the lower one for burning small fuel using a pellet burner;
• Work in manual and automatic mode;
• The possibility of using different types of fuel that are more accessible to the consumer;
• The increased volume of the bunker ensures continuous operation of the boiler for up to 3-5 days;
• Double prevention of fire in the auger;
• Environmental friendliness – compliance with all sanitary and environmental emission standards;
• Convenience, ease of maintenance and long service life of the equipment (15 years or more);
• The uniqueness of the equipment is also due to its modern automation with a convenient multifunctional menu;
• The boilers are made of 5 mm thick boiler steel;
• Operating temperature of flue gases 90-110 °C; operating pressure in the heating system - up to 0.6 MPa (on request);
• Availability of a smokeless combustion system when using all types of solid fuel and combustible waste.

The structure of the boiler "Retra-4M" with a capacity of 25-600 kW

Types of boilers:

• F – with lined hatches;
• B – with water-cooled hatches;
• P – the front side of the boiler is vertical (straight);
  
• K – the front side of the boiler is inclined (at an angle).
  

Upon special request, the boiler heat exchanger can be made reinforced - operating pressure up to 0.6 MPa.

Control system for solid fuel boiler "Retra-4M"

The boiler design provides for its operation together with an electronic control panel , a blower fan and an auger drive.

The control system is based on an electronic controller, which is designed to ensure a set temperature of the coolant at the outlet of the solid fuel boiler, which is measured using a digital temperature sensor.

The operating principle of the device is to supply fuel, control the combustion process of the fuel and the circulation of the coolant by adjusting the speed of the fans that pump air, and supplying power to the auger drive and the circulation pump.

The principle of operation of automation

During and after the automatic loading of the required amount of fuel into the burner, the fan intensively forces air for a set period of time to achieve a stable combustion temperature. This cycle is repeated until the water temperature in the boiler rises to the base values set on the thermostat. After this, the automatic system switches to combustion maintenance mode. When the temperature drops to the set minimum level (recommended: 45-55°C), fuel is automatically loaded from the hopper again, the fan is turned on, and the boiler cycle repeats. If the temperature reaches the set maximum level (recommended: 85-90°C), the automatic system shuts off the fuel supply and the fan and switches to combustion maintenance mode.

Delivery set of the boiler "Retra-4M"

1. boiler;
   
2. Pancerpol PPSM pellet burner complete with auger and gear motor;
3. Fire extinguishing system with BVTS valve;
4. feed bin;
5. boost fan;
6. control panel;
7. safety valve;
8. pressure gauge with a tap for the pressure gauge;
9. cast iron grates;
10. plug for pellet burner (for manual operation);
11. fastening.

The TRIO boiler is equipped with a retort burner from a Polish manufacturer, whose operation is controlled automatically by a controller. The boiler's efficiency is 93%. Its operation is highly efficient and reliable.