Gas Fired Boiler Selection Methods
Gas fired boiler and its burner are the main equipment of boiler room and the decisive factor to determine the process flow of thermal system, gas supply system, flue gas system and so on. Whether the boiler is selected properly or not has a key influence on the technical and economic index of the whole boiler room design and the safety and economy of operation and management.
Types and parameters of thermal medium
Types and parameters of heating medium are important parameters for selecting boilers. Boiler selection should be determined according to user's production process, heating ventilation, domestic heating and other heating equipment needs. In small and medium-sized industrial boilers, heating medium has three kinds of saturated steam, superheated steam and hot water.
Combustion equipment
The combustion equipment of the boiler should be suitable for the nature of the gas used and the pressure of gas supply. The following problems should be paid attention to when selecting the boiler from the burning point of view:
1. Each type of gas-fired boiler is designed according to a certain nature of gas, it can only be guaranteed normal use within the range of little change in the nature of gas. When the change of gas properties exceeds a certain range, the combustion will deteriorate and the output of the boiler will not be enough. The factors that have a decisive influence on boiler combustion in the composition and properties of gas are the calorific value, specific gravity and flame propagation speed of gas. When choosing a boiler, the first thing to see is whether the combustion equipment is suitable is the comparison of these indexes of gas and the gas used in the design of the boiler. The adaptability of various types of boiler to the gas properties can be considered according to the design and operation instructions of the boiler manufacturer.
2.The stability of gas supply pressure is an important factor to be considered when choosing a boiler. When the supply pressure is low, the boiler should be equipped with a low-pressure burner. When the pressure is high, the pressure can be reduced by a pressure regulator to achieve the required supply pressure for boiler combustion. At this time, boiler selection can not be constrained by the gas supply pressure.
3.When there are many boilers with different models or capacity in the boiler room, the combustion mode of each boiler and the required gas supply pressure should be as close as possible, so as to simplify the pressure regulating system and the gas supply pipeline and facilitate operation and management.