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我厂生产的城市煤气是油煤气、直立炉煤气和水煤气的混合煤气,出厂的煤气热值是用RLB-1型气体热值仪连续自动测定的,煤气热值一般控制在16.748±0.419MJ/m~3。测定煤气热值时,取压后的煤气首先经过素瓷过滤器滤去煤气中的焦油、水分和尘埃等杂质,再依次在减压阀中将煤气压力从0.06MPa降至2～5kPa;在粗调压器中降至300～400Pa;在精调压器中将压力稳定在10～11Pa。然后通过φ1.1mm的孔板将煤气定量地供入燃烧筒中燃烧,用两支热电偶测出温差毫伏信号。在空气流稳定的条件下,电偶的温差
The city gas produced by our factory is oil gas, mixed gas of upright furnace gas and water gas. The calorific value of the factory gas is continuously and automatically measured by RLB-1 gas calorimeter, and the calorific value of gas is generally controlled at 16.748 ± 0.419MJ / m ~ 3. Determination of gas calorific value, the pressure of the gas after the first filtered porcelain filter gas to the tar, water and dust and other impurities, and then in the valve will be the gas pressure from 0.06MPa down to 2 ~ 5kPa; in Rough regulator down to 300 ~ 400Pa; fine regulator will be stable at 10 ~ 11Pa pressure. Then through the φ1.1mm orifice plate gas will be fed into the combustion tube quantitative combustion, with two thermocouple temperature differential millivolt signal. Under the condition of stable air flow, the temperature difference of galvanic couple