Pellet boiler 700 kW FOCUS (300-750 kW), ash removal

Pellet boiler 700 kW FOCUS (300-750 kW) with screw ash removal into ash receivers

The automated pellet boiler 700 kW FOCUS has a single block architecture designed for operation in an autonomous mode. The main emphasis in the development and production of the boiler is on the efficiency of heat removal when working with a flare pellet burner on high-ash (agro) pellets - as the basis for the economic feasibility of purchasing and paying off the equipment. The engineering solution involves reducing manual labor for cleaning the boiler, increasing the periods between cleanings, convenient removal of ash into roll-off containers.

Main advantages :

• Maximum ash pan size for operation with high ash fuel.
• Built-in screw ash removal system from the boiler ash pan.
• Built-in roll-away containers for collecting and removing ash.
• Built-in screw ash removal system from the burner grate space to the boiler ash pan.
• Cleaning of the pellet burner is carried out in the boiler ash pan and through the screw ash removal system into external containers.
• Hybrid structure of the heat exchange part of the boiler, taking into account the infrared radiation of the burner torch.
• The section for removing the primary thermal stress of the torch (there is no section of point impact of the torch on the heat exchanger structure) – simultaneously performs the role of settling heavy particles of the volatile component of the torch, working as an ash filter.
• The convective part of the heat exchanger is maximally developed in combination with a highly efficient horizontal heat exchanger.
• Well-thought-out convenient maintenance of the heat exchanger (wide hatch, horizontal cleaning, ash chamber in front of the chimney).
• The high-capacity boiler ash pan is designed for operation in industrial conditions. With the correct selection of equipment, even on high-ash pellets.
• The location of the boiler door on the pellet pre-firebox in the sliding version.

The 700 kW pellet boiler is additionally (at the customer's request) equipped with a ready-made piping with a three-way or four-way valve with IMP Pumps pumps. Which, in combination with the control automation, provides protection against overcooled coolant in the return circuit leaving the heating system and the absence of condensation in the boiler.

This in turn increases the efficiency of 30% in comparison with a similar installation, but without regulation of the coolant temperature, operating on a cold system (when the "return" is below 40*C). There is no need to select mixing equipment and coordinate with the boiler automation.

Quick assembly units

For ease and speed of installation - the 700 kW pellet boiler is equipped with a Victaulic quick-connection system (Victaulic connections, also known as Groovlock). For prompt operation, guaranteed high-quality connection (does not require symmetrical tightening like a flange connection, does not require welding at the installation site), allows for small distortions during installation (up to 2-3 degrees).

This gives the fitter freedom of action in case of deviations of the room from the design dimensions. The boiler comes complete with couplings and bends for welding or threaded connection (specified when ordering).

Features of boiler installation

The 700 kW pellet boiler and connection system are designed for assembling a boiler house in a cascade type, when initially the entire capacity is not required (for example, during the construction of a large facility), and when there is a need to increase the design capacity - several boilers with a total capacity of up to 2.2-2.5 MW are additionally installed.

The presence of three-way valves in the boiler circuit of each boiler and a hydraulic arrow in the heating system disconnects the non-working boiler from the flow, without restricting the flow of the system and without cooling the coolant through the heat exchanger of the non-working boiler.

Design features

• Boiler material: structural steel 09G2S.
• Thermal insulation - 50mm thick basalt mineral wool.
• Boiler casing – stainless polished steel AISI201
• Adjustable hinges and locks for fine-tuning the tight fit of the ash pit door and heat exchanger to the opening.
• Possibility of changing the side of the door opening.
• Removable, sliding containers for ash removal from the boiler.
• A hybrid heat exchanger consisting of a plate and a fire-tube. Where the plate stroke relieves the torch stress and deposits the bulk of heavy particles. This is especially relevant when working with high-ash or agricultural ash pellets.
• The most developed convective fire-tube part of the heat exchanger actually corresponds to heat transfer.
• Large door for easy access and complete cleaning of the heat exchanger surfaces.

 Pellet burner TM "FOCUS" , which is included in this equipment set, will work both on clean wood pellets and on agropellets with an ash content of up to 10% (pellets from seeds, corn, buckwheat, rice, furniture, straw).

Pellet boiler 700 kW: useful automation options

• Automatic ignition (2 ceramic FKK candles are installed for contactless air ignition of pellets).
• Auger for feeding fuel into the burner combustion chamber.
• Built-in burner auger temperature sensor (safety, automatic shut-off of fuel supply with an emergency signal).
• Built-in infrared flame sensor for recording and monitoring flame radiation levels (safety, automation records the presence and absence of flame using appropriate behavior algorithms).
• Selected proportions of primary and secondary air for proper organization of fuel combustion.
• Highly reliable crank drive – moves the grate, which makes the 700 kW pellet boiler a more advanced model compared to models from other manufacturers.
• A prefabricated grate for automatic cleaning of the burner. Prefabricated elements made of heat-resistant chromium cast iron ЧХ32.
• The combustion chamber of the burner is lined with firebrick, acts as a catalyst for burning ballast gases, and increases the efficiency of heat production by the burner (increasing the flame temperature).
• All models of flare burners have a “break” in the fuel supply line, ensuring the safety of equipment operation.
• Controller, allowing you to easily configure the equipment.
• The Internet access module provides the 700 kW pellet boiler with remote control and is available as an additional option: convenient for setting up and controlling the burner, creating a database of fuel consumption statistics, errors, power graphs, temperatures, etc.

Functions and equipment

Pellet boiler 700 kW FOCUS (300-750 kW) has the following functions and features, such as:

• power adjustment within 300 kW – 750 kW;
• 5 basic security levels;
• automatic operation: ignition, extinguishing, auto-cleaning in the operating mode, cleaning from the main ash when extinguishing;
• automatic screw ash removal into external ash containers;
• automatic cleaning of the burner into the general ash removal system of the boiler;
• ceramic spark plug, duplication of spark plugs;
• low power consumption (800 W);
• PID-regulation (the possibility of precise control of the burner using an analog control signal, including within the framework of "smart home" technology);
• movable cast-iron grate for mechanical cleaning of the burner;
• pump control (hot water treatment and heating);
• work with room thermostat and internet module;
• work with weather regulation;
• built-in ash filter.

The 700 kW pellet boiler complies with GOST32452-2013 (EN 15270:2007). An 18-month warranty is provided.

Contents of delivery:

• 700 kW pellet boiler complete with burner and screw ash removal system;
• rolling ash removal container - kit;
• EcoNet internet module;
• weather sensor;
• smoke gas temperature sensor;
• boiler return temperature sensor;
• feeding screw conveyor - 2 m;
• corrugated PVC pipe - 1 m;
• pellet burner controller;
• documentation.

Equipment for pellet boiler rooms

Devices and modules that increase the level of autonomy of the heating system:

• harness kits with a three-way or four-way valve integrated into the boiler control system;
• bins for storage and feeding of pellets;
• room touch EcoSter regulator;
• additional temperature sensors.

Consult our specialists on the specifics of deploying heating circuits and connecting. The 700 kW pellet boiler is a software-controlled equipment that allows you to manage the climate control in the room.

Dimensions (edit)

Listed in each position separately.

Chimney diameter

 

Requirements for the boiler room

When designing a boiler room where a 700 kW FOCUS pellet boiler will be installed, it is necessary to adhere to the following requirements:

• MDNAOP 0.001.26-96;
• DBN B.2.5-XX: 20XX;
• SNiP 2.04.05-91 "Heating, ventilation and air conditioning";
• SNiP II-35-76 "Boiler plants".

 

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