Combined burners- burners for operation on two or three types of fuel. These burner devices combine the developments that are used in the production of gas and liquid fuel burners. Can be used as fuel various combinations fuels: gas-diesel, gas-fuel oil, gas-oil, etc. Also, there are solutions for the possibility of using two types of gas and liquid fuels. Wherein combination burners can be either with one ramp or with two.

The main areas where they are applied combination burners are boiler houses of housing and communal services, as well as boiler houses of various industries. In boiler rooms of private houses, combined burners are installed much less frequently. The combined burner is the guarantor of the continuous operation of the boiler room, even when the main fuel is turned off. Combination burner includes: burner body, mixing device with swirler, automatic fuel ignition system, automatic burner control, air fan, built-in liquid fuel pump, gas train, fuel hoses and other equipment. According to the type of regulation, combined burners are divided into single-stage, two-stage, three-stage, sliding two-stage and modulating. When operating on liquid fuel, the burners can only be operated inone-stage, two-stage and three-stage mode.

Combined burners for boilers are selected in the same way as other burners. However, it is necessary to take into account what fuel the boiler for which the burner is selected can operate. Not all boilers can operate with heavy liquid fuels. For example, fuel oil or oil. Therefore, gas-oil and gas-oil burners may not be used on all boilers.

Gas-diesel burners

Gas-oil and gas-oil burners

It would seem obvious - gas is the most profitable energy source, and if your boiler room has a connection to the main gas pipeline, then an alternative this species no need to look for fuel.

But, unfortunately, there are situations that can make adjustments to the work of your heating point. The main purpose of the combined burner is the ability to switch from the main type of fuel to the reserve one. For example: the use of a reserve type of fuel is mandatory at facilities of the first category, according to SNiP RF 41-01-2003 - social institutions (kindergartens, schools, medical institutions), art galleries, mines, chemical and special industries and so on. This also includes objects of strategic importance, which are under the jurisdiction of the Ministry of Defense, the Ministry of Emergency Situations and other government departments.

In a normal situation, to change the energy carrier, it is necessary with heating boiler dismantle one burner and, accordingly, mount another, with all the ensuing consequences - installation, adjustment, and so on. The principle of operation of a combined burner is that in the absence of the main type of energy (usually it is gas), for some reason, the supply of a backup energy carrier, diesel fuel, fuel oil or oil to the burner is switched on. And without replacing the burner itself.

According to the type of fuel, combined burners are divided into gas / diesel fuel and gas / fuel oil (oil) burners. Structurally, the burner in one housing contains all the necessary components for operation on the main or backup energy source: burner housing, fan with motor, flame head, control elements and automation (automatic ignition, transformer, etc.), gas train, fuel pump, heater fuels (fuel oil, oil), related components.

When choosing a burner, it is necessary to start from the same inputs as when choosing a single-fuel burner - the power of the boiler plant, the aerodynamic resistance of the heat exchanger, gas pressure, fuel viscosity. Accordingly, according to the type of regulation, everything is the same - one-stage, two-stage, smoothly-two-stage (as a rule, this mode is available only for gas, when a PID controller and a sensor are connected, the burner will operate in modulation mode).