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比值放大器是仪表出风的放大装置,用它放大調节器的出风,从而解決了我厂裂化爐烧燃料气时烧火器的自动控制問题。以前,我厂裂化爐是用渣油作燃料,1957年大部分改烧裂化气。控制器是选用的浮动式压力調节器,調节閥后压力不变。浮动式压力調节器是一种沒有弹簧的气体調节閥,鼓膜上下面积相等,两面鼓膜上方受控制器出风压力,下部则受被控制介質的压力。当进入鼓膜上部的仪表出风压力低于介質压力时,閥心上昇,閥則关閉,仪表出风压力高于介質压力时,閥心作用相反。浮动式压力調节閥的控制特点是:当鼓膜上的压力不变时,能保証閥后介質的压力等于鼓膜上的空气压力,只要介質压力稍有变化(不等于空气压力),就将引起鼓膜向平衡位置移动。裂化爐所烧的燃料气的压力,亦即閥的鼓膜下部
Ratio amplifier is the instrument of the wind amplification device, use it to enlarge the regulator of the air, thus solving the factory burning furnace fuel gas burning when the burner automatic control problems. In the past, I plant cracking furnace is used as a fuel residue, most of 1957 cracked gas. Controller is the choice of floating pressure regulator, the pressure regulator valve unchanged. Floating pressure regulator is a spring-free gas regulating valve, the tympanic membrane area equal to the upper and lower sides of the tympanic membrane by the controller of the wind pressure, the lower part of the pressure by the controlled medium. When the tympanum into the upper part of the instrument when the air pressure is lower than the media pressure, the valve heart rose, the valve is closed, the meter air pressure is higher than the medium pressure, the role of the valve opposite. Floating pressure control valve control features are: when the pressure on the tympanic membrane unchanged, to ensure that the media pressure after the valve is equal to the tympanic membrane air pressure, as long as the medium pressure changes slightly (not equal to the air pressure), it will cause The tympanic membrane moves toward the equilibrium position. The pressure of the fuel gas burned in the cracking furnace, ie, the lower part of the tympanic membrane of the valve