Abstract
This paper presents the concept and importance of acid number. Improvement method is based on the GB / T 7304-2014 “Standard test method for acid number of petroleum products by Potential Titration”. The detection and study of the acid number are obtained by halving sample volume in two categories—used and unused heat transfer fluids. This article studies and establishes a green and environmentally friendly method for automatic potentiometric titration of organic heat carrier acid value, which uses a smaller sample volume and titration solution volume to achieve fast, environmentally friendly, intelligent, and efficient results. The experimental results show that after halving the sample volume, the data reproducibility is relatively high, but still within the standard reproducibility range, and data of the heat transfer fluids is far less than the standard reproducibility range. Through this paper, the acid number of heat transfer fluids is able to be strictly controlled and timely monitored to ensure the safety, green environment development and operation of boilers and systems.
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