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Available and future equipment for production and use of biodiesel does not fully ensure the process efficiency in agricultural production. Therefore, it is necessary to increase the energy efficiency of biodiesel by improving technical means for its production and consumption. The mathematical model of energy-efficient emulsion stirring in circulation mixers-separators is improved. The model allows determining the geometric parameters (length and diameter in cross-sections) of the emulsion jet with the turbulent regime of stirring. The use of injectors for creating the turbulent motion regime of the emulsion jets in a biodiesel production unit is proposed. The emulsion passage through injectors also provides uniform layer-by-layer emulsion stirring. The emulsion is pumped out from the mixer bottom, the mixed emulsion layer is lowered. Turbulence decreases, higher reaction completeness is achieved. The high quality of biodiesel and reduced energy consumption are achieved. The geometric dimensions of mixers of various capacities are determined, energy consumption for biodiesel production are substantiated. The agro-industrial technology for biodiesel production using mixers for all production stages is proposed. It is found that the biodiesel temperature rise increases the fuel spray angle at the exit of injectors, which improves emulsification and combustion efficiency of biodiesel. The flowchart of biodiesel use in tractor engines with the two-stage heating system is proposed. In the proposed system, biodiesel is heated in the fuel tank and immediately before injection into the engine cylinders. Experimental verification of the machine-tractor unit, equipped with a diesel heating system is performed. The use of circulation mixers-separators allows biodiesel production by the simplified technology in agricultural production. Application of the developed two-stage biodiesel heating system extends the temperature range of using pure biodiesel and reduces its consumption.

Rationale for the parameters of equipment for production and use of biodiesel in agricultural production