Preheating system for improving low-temperature fluidity of biodiesel

Abstract

The invention discloses a preheating system for improving low-temperature fluidity of biodiesel. The system is characterized in that two ends of an output pipeline are respectively connected with a boiler and a heat exchanger, the output pipeline is provided with an electromagnetic valve for controlling flow, the heat exchanger is arranged in a daily oil tank, an outlet of the heat exchanger is connected with a water return pipeline, and the water return pipeline is connected with a water tank; the water tank is connected with the boiler through a water supply pipeline and supplies water to the boiler; and a thermocouple is inserted into the daily oil tank and used for detecting the temperature of biodiesel in the daily oil tank, the control system is connected with the electromagnetic valve and the thermocouple, and the control system monitors the temperature of the biodiesel in the daily oil tank through the thermocouple so as to adjust the opening degree of the electromagnetic valve. According to the preheating system, the temperature of the biodiesel can be increased to be higher than a cold filter plugging point, the low-temperature fluidity of the biodiesel is guaranteed, and meanwhile the atomization performance of the biodiesel can be improved.

Description

technical field [0001] The invention relates to the technical field of green fuel combustion, in particular to a preheating system for improving low-temperature fluidity of biodiesel. Background technique [0002] Biodiesel is the conversion of bio-oils such as oil crops, animal fats and catering waste oil into combustible regenerative liquid fuels, and is an effective form of biomass energy utilization. Because the properties of biodiesel are close to those of conventional diesel, and it has the advantages of low carbon residue, low concentration of particulate matter in flue gas and low sulfide emission during combustion, the combustion and pollutant emission characteristics of biodiesel have gradually attracted the attention of researchers. [0003] Most of the existing biodiesel is a blend of biodiesel and pure diesel, which is calculated as B10, B20, etc. according to the volume ratio of biodiesel. Because biodiesel is a mixture of various fatty acid monoesters obtaine...

AI Technical Summary

Problems solved by technology

Because biodiesel is a mixture of various fatty acid monoesters obtained through transesterification of oil crops, wild oil plants, microalgae and other aquatic vegetable oils, animal oils, and catering waste oils, etc., which makes biodiesel cold The filtration point is relatively high. Take biodiesel made from food waste oil as an example. The cold filter point of biodiesel (B30) with a fraction of 30% is -7°C, which means that the low-temperature fluidity of biodiesel is poor. When the temperature is low, there will be crystals in biodiesel, so that the burner Nozzle clogging, prone to accidents, which also makes the use of biodiesel subject to geographical restrictions

[0004] The existing technology mainly reduces the cold filter point of biodiesel by changing the molecular structure of organisms or adding additives. These methods are complicated to operate and costly

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