Writer： admin Time：2021-04-14 00:00 Browse：℃
The main points of the fuel gas burner natural gas, liquefied petroleum gas, city gas and other combustible gases, industrial gas burners are widely used, with the view of the burner so as to standard test conditions on a burner
Burner so as to standard test conditions on a burner
Automatic burner monomer like a flame thrower, flame sprayed into the furnace, and the heat output to achieve complete combustion in the furnace; home measuring burner combustion products of the combustion chamber is full of the specific criteria of. It is generally the standard experimental conditions as the selection condition on the burner and boiler. Comprising: a power; air flow pressure in the cavity; furnace space and geometry (diameter and length). Aerodynamic characteristics match, but also refers to the degree to satisfy these three conditions. Power burner means when the full combustion, combustion quality to which the number per hour (kg) or volume (the m3 / h, the standard state) of the fuel, and also give the corresponding thermal energy output (kw / h or kcal / h ). Is calibrated and the boiler steam production, fuel consumption is also marked, the selection of both must match. Within an oil boiler, hot gas from the combustion engine starts, through the furnace, heat exchanger, flue gas collector and the exhaust chimney to the atmosphere, the composition of a fluid thermodynamic process. After the flow of hot gases of combustion, the furnace pressure head upstream of the flow passage, as like river water, drop, head to the downstream flow. Since the furnace wall of the furnace, channel, bends, baffles, Gap chimney and the flow of gas there is resistance, the pressure loss will result. If the head can not overcome the pressure loss in the process, the flow can not be achieved. Therefore hearth smoke must maintain a certain pressure, in terms of the burner, said counter-pressure of the boiler without Blower means, considered along the furnace pressure in the pressure head loss must be higher than the atmospheric pressure. The size of the back pressure directly affects the output of the burner, the back pressure with the size of the furnace, the flue length and geometry-related. Large flow resistance for the boiler to the burner to high pressures, for a particular burner, which head has a value corresponding to throttle air flow condition. When the intake throttle damper changes, air flow and pressure change followed, the burner output changes also followed. Small head wind amount is small, when a high ram air volume. For a particular pot Shanghai, the incoming wind volume, flow resistance followed by larger, so that backpressure furnace, increase back pressure of the furnace and suppressing wind the natural burn, so the selection burner must learn their power curve, the influence of the size and geometry of the furnace for the boiler, the furnace space, in the design of the heat load is first determined by selecting the strength of the furnace, which can be preliminarily determined according to the volume of the furnace. After determining the furnace volume, but also to determine its shape and size, the design principle is to fully utilize the volume of the furnace; avoid dead ends, have a certain depth, a reasonable flow, ensure sufficient reaction time for complete combustion of the fuel in the furnace, for words, let burner flame spray have sufficient residence time in the furnace, because even though oil mist particle is small (0.01mm), before the spray has been mixed gas burner ignition and began to burn, but not sufficient. If the furnace is too shallow, the residence time enough incomplete combustion occurs, the light exhaust CO exceeded, while black smoke, mainly the power. Therefore, in determining the depth of the furnace, should be in line with the length of the flame, to increase the diameter of the outlet at the center back ignition should also ensure that the volume occupied by the gas reflux. The geometry of the furnace main effect of the flow resistance and uniform airflow radiation. A boiler in order to go through repeated debugging and burner have a good match.
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