The Refinery Of Low-temperature Heat Instead Of High-Quality Steam Heating Technical-economical Analysis

The use of energy related to the national interest and people’s livelihood and the sustainable development of national economy, and the rational use of low-temperature heat can effectively improve energy utilization efficiency. Many companies are widespread abundant low-temperature heat, but because of the not enough attention, much go to fail. First through to the current low temperature heat utilization synthetically, this paper sums up the low-temperature heat utilization of all kinds of effective methods and ways. From different point of view, this paper focus on selecting the low- temperature oil and the low-temperature hot water, these two kinds of common low temperature heat in the petroleum refiners. Through the concrete case of these two kinds of low-temperature heat how to replace steam heating, the technical economy analysis is made too. Among them, due to the terminal temperature of the oil temperature-keeping is not high, the low-temperature hot water can be used to instead of high quality steam to heat in the tank farm. In this paper, through the typical tank farm reform, by artificial heat transfer calculation, it points out that keeping the existing tank heater, hot water can meet the needs of the oil temperature-keeping. When the oil need to be quick heated, the original steam heating system can be enabled, as a hybrid heating system. So it would cost minimum investment to reasonable recovery of waste heat, with the benefit more than 1.2 million yuan a year. The effect is remarkable. Because the low-temperature oil temperature is higher, and boiler feed water requiring heat is more and temperature requirement is a bit high, it can be used as a substitute for high quality steam heating boiler feed water. From the perspective of cross device heat combined using, the article calculates the heat exchange and heat exchanger model by the software to meet the needs of the heating boiler feed water. And through the economic analysis methods, the with-and-without comparsion method and the before-and-after comparison method, it is concluded that lowtemperature oil instead of high quality steam heating project effect is very significant. In this paper, the effect of low temperature heat recovery on the comprehensive energy consumption of oil refining is analyzed,in order to cause for low temperature heat utilization attention。The article points out that the low-temperature heat resource is very rich in most enterprise, we should give enough consideration in the construction of new plant recycling, should pay attention to in the process of old equipment running hot joint application, to make full use of low-temperature heat, so as to realize the purpose of improving economic benefit.