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一、引言目前,燃气做为一种清洁可靠的能源在国民经济各部门得到了日益广泛的应用。一般的民用燃气系统及工业用燃气系统,对燃气的热值、压力并无太苛刻的要求,比如,城市煤气对热值、器前压力的要求是 H_L〉14630千焦/米~3,压力0.75～1.2P_n。(P_n 为燃烧器额定压力);一般工业炉则对热值要求更低,有时H_L≥4180千焦/米~3即可使用;器前压力也只要求能保证炉内压力波动在393.4～490.5帕以内即可。
I. Introduction At present, as a kind of clean and reliable energy, gas has been widely used in various sectors of the national economy. General civil gas system and industrial gas system, the heating value of gas, the pressure is not too harsh requirements, for example, the city gas heating value, the pressure before the request is H_L> 14,630 kJ / m ~ 3, the pressure 0.75 ~ 1.2P_n. (P_n burner rated pressure); general industrial furnace is less demanding calorific value, and sometimes H_L ≧ 4180 kJ / m ~ 3 can be used; before the pressure is only required to ensure that the furnace pressure fluctuations in the 393.4 ~ 490.5 Pa can be within.