Selection burners Oilon

Background

First of all, for the selection of the burner, we need some information about the object:

- boiler parameters: power + efficiency, back pressure in the furnace, the furnace size and thickness of the front wall;
- fuel used, to determine the type of burners: KP, RP, GP, GKP, GRP;
- fuel pressure before the burner (at the point of connection).

Calculation burner

Determines the power of the burner according to the formula: Qg = Qk/η
where: Qg - burner power, kW; Qk - the power of the boiler, kW; η - efficiency of the boiler.

calculate the normal fuel consumption: Vn = Qg/Hi
where: Vn - normal fuel consumption; Hi - calorific value of fuel, kVtch/m3
- for natural gas Hi ≈ 10 kVtch/m3,
- for diesel fuel Hi ≈ 11,86 kWh/kg,
- for fuel oil Hi ≈ 11,22 kWh/kg,

Defining working point

Choose from technical data to the burner, we need a diagram of power/back pressure and using our data find the working point of the burner.
The diagram seen working range of the burner. Choosing the burner is necessary that the working point was located inside the chart, as close to the right. Otherwise, trying on the adjacent diagram. For example: we have a capacity of 2,780 kW burner and the back pressure of the boiler 12 mbar get the point shown on the figure.
Note that for the burners on a different type of fuel and with a different method of regulation has its own chart.

selection valve for gas and combined burners

We find in the technical data to the burner, table selection valves. Choosing a gas valve of appropriate size based on the type of burner, the pressure before the burner and the necessary power to us. Please note that these values in the table, are valid for 0-pressure combustion chamber mbar. That is necessary to reduce pressure on the value of the inlet gas backpressure and choose the valve according to the received pressure. Power parameters in the table below for natural gas.

example , inlet gas pressure - 70 mbar backpressure boiler - 12 mbar, and the required power burner 2780 kW. Effective pressure: 70 mbar - 12 mbar = 58 mbar.
According to an example, we need to pick up the valve to the burner GKP-280 M, to power the burner was not less than 2,780 kW at a gas pressure at the inlet 58 mbar.
The result: the size of the valve for the burner - DN 65.

Checking the burner size boiler furnace

The schedule determines the length and diameter of the torch burner.
necessary that the size of a torch burner do not exceed the dimensions of the boiler furnace.

Pay particular attention to the length of the burner head.
length of the burner head must match the thickness of the front wall of the boiler or exceed it by 10 .. 20 mm, if there are no other requirements of the manufacturer boiler.
Do not forget accessories such as: fuel pump station, gas pressure regulator (stabilizer), expansion bellows, filter, ball valve.

in aid to the calculation of

1 t/h steam ≈ 700 kW boiler,
1 Nm3/h gas ≈ 10 kW burner,
1 kg/h diesel ≈ 11,86 kW burner,
1 kg/h oil ≈ 11,22 kW burner.
The combustion gas needs 12 .. 13 m3/h air at 10 kW power burners,
Burning g/t want to 13,5 m3/h air at 1 kg/h of fuel.