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一、问题的提出 目前,各厂矿企业都把提高经济效益放在管理工作的首位。因此,进一步提高计量的准确性显得越来越重要了。特别是对于用节流原理测量过热蒸汽流量的情况。由于蒸汽重度随操作条件(温度、压力)变化,使差压计测得的差压值所反映的流量值与实际值差别很大,造成能量消耗方面信息不准。为了解决这一问题,过去人们曾采取人工修正方法。这种方法不仅信息落后、断续,且不能实现带温度、压力补偿的流量定值控制。随着自动化仪表的发
First, the issue put forward At present, the factories and mines and enterprises have to improve economic efficiency in the management of the first place. Therefore, to further improve the accuracy of measurement is more and more important. This is especially the case with the throttle principle for measuring the flow of superheated steam. Due to the severity of steam changes with operating conditions (temperature, pressure), so that differential pressure differential pressure gauge to reflect the value of the flow rate and the actual value of a great difference, resulting in information on energy consumption is not allowed. In order to solve this problem, people used to manually modify the method. This method not only lags behind the information, intermittent, and can not be achieved with temperature, pressure compensation flow setting control. With the automation of the instrument’s hair