Bunker automatic coal boilers

During the cold months, finding effective heating solutions is essential to keeping your home warm. A growing number of homeowners are using alternative heating techniques due to growing energy costs and worries about the effects on the environment. Bunker automatic coal boilers are a method that is becoming more and more popular.

An example of a heating system that uses coal as its main fuel source is a bunker automatic coal boiler. Automatic coal boilers are designed with a bunker or storage container that automatically feeds coal into the combustion chamber, in contrast to traditional boilers that require manual coal feeding. This automation guarantees a steady heat output while also saving the trouble of frequent refueling.

The great efficiency of bunker automatic coal boilers is one of their main benefits. These boilers are made to extract as much heat as possible from the burning of coal, giving your house effective heating. Furthermore, compared to alternative fuels, coal is comparatively cheap, which makes bunker automatic coal boilers an affordable option for a lot of homeowners.

The dependability of bunker automatic coal boilers is an additional advantage. These boilers can ensure your home is comfortable and warm for many years to come with regular maintenance. In areas with harsh winters, this dependability is especially crucial, as a reliable heating system is necessary.

Bunker automatic coal boilers also have the benefit of being versatile. Homeowners can use them as standalone units or integrate them with their current heating systems, giving them flexibility to suit their unique needs and preferences. Bunker automatic coal boilers can be customized to fit a variety of applications, whether you’re looking to heat a larger commercial space or a smaller residential property.

How the automated coal-fired boilers are organized

• After the boiler is switched on, the auger automatic coal feeding into the boiler is started. The first portion of fuel is ignited by means of electric plasma. As it burns, a new portion of coal is fed into the furnace. If it is necessary to increase the heating intensity, the screw conveyor speed is increased. After reaching a certain temperature, the fuel supply stops.
• Simultaneously with the screw transmission, the air supply to the furnace is switched on. The controller monitors the speed of the air masses, which affects the intensity of combustion.

• Automatic grates are installed in the furnace. As the coal burns, the ash and unburnable residue is dumped into the ash box. The grates are turned over, the ash falls downwards, directly onto another auger, by means of which the combustion products are removed. The self-cleaning system also passes under the broken flue ducts.
  Soot left on the walls is cleaned by special springs located inside the channels and crumbled on the screw gear of the self-cleaning system. All combustion products from the furnace chamber and the flue duct are directed to the ash box.

The coal boiler’s microprocessor controller is its "heart and brain." However, the system’s ability to function smoothly depends on a few more components. A hopper-coal doser and a coal burner both have significant roles to play.

The smoke temperature should not rise above 150°C and there shouldn’t be any soot residue at the chimney outlet if the automatic coal boiler’s technical parameters are chosen correctly.

Principle of operation of the coal burner

The operation of an automatic coal boiler would be impossible without a specialized burner. Combustion of fuel occurs batch by batch. A forced air supply and electric ignition system are included in the design.

The following are the burner operation’s primary tasks:

1. Provide optimum conditions for complete combustion of the fuel with a minimum amount of underburning.
2. Guarantee the maintenance of the flame torch, to maximize heat output.
3. Prevent excessive coal consumption, by optimizing the portioning of the fuel supply.

This effectively means that the blower fans, controller, smoke pump, coal feeder, and burner device are all closely related to one another. The devices function as a single unit to guarantee that the objectives are completed.

The type of coal used in boilers with auto-feeding determines the type of burner that manufacturers use:

Retort burner – designed for burning coal of Eco-pea type, without the presence of shtuba, small particles of rock (coal fines). Optimal fuel fraction 5-25 mm.

AKM burner device – it is possible to burn coal with a high, up to 60%, content of stubbins. Fraction size 5-25 mm.

When selecting a coal-fired domestic automatic boiler, consider the specifics of how the boiler will operate in the future, especially the kind and volume of the fuel component. This parameter determines the type of burner.

A microprocessor controller—basically, a miniature computer—is used to automate the coal boiler’s fuel supply. The burner has an optical sensor installed to keep an eye out for flames. An indication for reinvention is provided in the event of fading out.

The boiler can be automatically controlled by connecting the controller to multiple room thermoregulators. The readings from the sensors determine how hot the heating medium is. Contemporary models employ weather-dependent automation, which enables you to adjust the boiler’s settings while accounting for the surrounding temperature.

A precisely measured portion of the coal is fed into the burner and burned. The fuel conveyor begins to move when the burner device sends a signal to the controller. The burner receives a fresh supply of coal, and the fans are turned on. The coherence of actions determines the boiler’s high efficiency of 87%.

The ability to automatically regulate the combustion process and precise coal portion feeding are the two most basic technical requirements for the burner control system. The device’s modulation should range from 30% to 100%.

Coal feeder hopper device

An additional crucial component that guarantees the automated plant’s functionality is the coal auto-feeding system. The fuel storage and burner device are connected by a screw or piston fuel transmission. Automatic coal boilers with a feed hopper that are linked to a built-in or freestanding storage unit with varying capacities.

The purpose of the feeding hopper is to store metal, and a screw conveyor is mounted underneath. The design incorporates a number of crucial elements to avoid coal jamming in the auger and fuel slush.

The subsequent crucial components are utilized in order to automate the boiler’s coal supply:

• Automatic coal crusher – burner device and screw conveyor are designed to use fuel of a certain fraction (up to 25 mm). The rock is poured into a special successor, with a coal crusher installed. After pulverization, the fuel enters the moving conveyor belt.
• Coal loosener – a special device is installed in the hopper, which prevents the stored coal from clumping into clumps, thus ensuring uniform feeding of the fraction to the auger and preventing its jamming.
• Feed motor-reducer – in motion, the conveyor is driven by an electric screw drive. Depending on the model, the power consumption required for operation is 130-180 W. The actuator is connected to the automation, switched on and off by a signal from the controller.
• Fuel storage – solid fuel automatic boilers on coal with a hopper, are of several types. The first ones are connected to a mechanized, free-standing storage facility. The advantage of such a solution is almost complete absence of time limitations in autonomous operation of heating equipment.
  The storage capacity is sufficient for the boiler to operate without stopping during the whole heating season. Automatic heating boilers on coal with a built-in hopper, do not require modification of a separate room for mechanized storage. The capacity of the fuel tank in the hopper coal boiler, enough for 3-7 days.
• Batch drum – a screw conveyor does not feed coal directly to the burner, as in the case of pellet equipment. First, the fuel portion is loaded into a special batch drum. After a signal from the controller, the drum starts to rotate. The fuel portion is poured onto the burner in an even, thin layer. After the coal burns out, the automatics gives a second signal and the process is repeated.

Solid fuel automatic boilers with an integrated coal tank that can be installed in a few hours. It might require a few days to install automated storage. With the aid of unique connectors included in the design, the hopper is installed. It is possible to mount the fuel storage above or below the boiler.

In today"s push for more efficient and sustainable heating solutions, bunker automatic coal boilers emerge as a promising option for homeowners looking to cut costs and reduce their carbon footprint. These innovative systems automate the process of burning coal for heat, providing consistent warmth throughout the home while minimizing manual labor and maintenance requirements. By harnessing the energy potential of coal in a controlled and efficient manner, these boilers offer a reliable and cost-effective heating solution for households, particularly in areas where coal is readily available. With advanced features such as automated fuel feeding and ash removal, bunker automatic coal boilers streamline the heating process, ensuring comfort and convenience for homeowners while also contributing to environmental sustainability through efficient combustion and reduced emissions.

Which coal is suitable for automatic boilers

Boiler loading mechanism intended to use a particular fuel percentage. Coal can be moved by most conveyors with a fraction as small as 50 mm. Because there is a lot of ash and unburnable residue produced during combustion, manufacturers do not advise using coarse coal.

All hot water solid fuel heating boilers with fully automated coal feeding systems must meet the following primary fuel quality requirements:

• Fuel grade "eco-pea".
• Recommended fraction size from 5 to 25 mm.
• The amount of fine particles is not more than 60%.

Prepackaged coal in bags best satisfies the above-described requirements. However, the use of specialized crushers is permitted if purchasing ready-made fractional fuel is not financially feasible.

By feeding coal through the crushing apparatus, a precisely regulated fraction of coal can be obtained in large quantities. The solution’s drawbacks include a lot of dust and tiny, stubby particles. The obtained composition is only burned using an AKM type burner.

Bunker automatic coal boilers are a viable option for effectively heating and insulating homes, particularly in regions with cheap and plentiful coal. These boilers produce a consistent and regulated amount of heat by automating the coal feeding process into the combustion chamber. They can minimize manual intervention and heat a house efficiently with proper maintenance and operation.

The high energy efficiency of bunker automatic coal boilers is one of their main advantages. Compared to conventional heating techniques, these boilers can produce a substantial amount of heat while using less fuel because they burn coal at a constant rate and optimize combustion parameters. By increasing efficiency, this not only lowers the environmental impact of burning coal but also helps homeowners save money on their heating bills.

Additionally, homeowners can benefit from the convenience and dependability of bunker automatic coal boilers. These systems require little supervision once they are installed and configured correctly. By doing this, homeowners can enjoy a comfortably heated home throughout the winter months without having to deal with the inconvenience of constantly maintaining their heating system. Instead, they can concentrate on other tasks.

In addition, compared to older coal heating systems, bunker automatic coal boilers can help improve the quality of indoor air. By reducing the amount of pollutants released into the air, advanced combustion technologies and integrated emission controls contribute to a healthier living environment for residents. The efficiency and safety of these boilers are further improved by adequate ventilation and routine maintenance.

In summary, automatic coal bunker boilers are a practical choice for home insulation and heating that provide enhanced environmental performance, convenience, and efficiency. Although they might not be appropriate for every household or area, their advantages make them worthwhile for individuals looking for dependable and affordable heating options, especially in places with an abundance of coal resources.

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