PLANT FOR BIOFUEL PRODUCTION Russian patent published in 2023 - IPC C10G1/06 

FIELD: biofuels production.

SUBSTANCE: invention relates to a technology for producing biofuels from natural sources of raw materials of biological origin, in particular, to a plant for the production of biofuels in the process of hydrothermal liquefaction of microalgae. The plant contains a feedstock preparation chamber, a hydrothermal liquefaction unit, feedstock heating means, a biofuel cooling and separation unit, and switching elements. Between the feedstock preparation chamber and the hydrothermal liquefaction unit, there are at least one high-pressure buffer tank for accumulating and heating the prepared biomass and a recuperative heat exchanger. The outlet of the feedstock preparation chamber is connected through a low pressure pump and the first controlled valve to the first inlet of the buffer tank, the second inlet of which is connected through the second controlled valve to the outlet of a gas cylinder containing neutral gas at a pressure corresponding to the biomass liquefaction pressure. The outlet of the buffer tank is connected through the third controlled valve to the inlet to the installation path, which includes the heated cavity of the recuperative heat exchanger, the working volume of the hydrothermal liquefaction unit and the heating cavity of the recuperative heat exchanger. The outlet of the heat exchanger is connected through the fourth controlled valve with the inlet of the tank for receiving products of hydrothermal liquefaction, equipped with a mechanical stirrer and a tubular cooler. In this case, the first outlet of the container for receiving hydrothermal liquefaction products in the gas phase is connected through the fifth controlled valve to the first input of the multi-fuel heater of the hydrothermal liquefaction unit. The second outlet of the vessel for receiving products of hydrothermal liquefaction in the liquid phase is connected through the sixth controlled valve to the inlet of the suction filter. The first outlet of the suction filter is connected by means of a screw for transporting the solid phase through the pelletizing unit to the second inlet of the multi-fuel heater of the hydrothermal liquefaction unit. The second outlet of the suction filter in the liquid phase is connected through the seventh controlled valve to the first inlet of the decanter, the second inlet of which is connected to the outlet of the compressor for separating biofuel and water. The output of the decanter is connected through the eighth control valve to the input of the storage tank of the obtained biofuel and through the ninth control valve - to the third input of the multi-fuel heater of the hydrothermal liquefaction unit.

EFFECT: increasing the yield of the target product and reducing heat losses in the hydrothermal liquefaction unit while increasing the productivity, manufacturability and energy efficiency of the plant.

2 cl, 1 dwg