Method for producing clean fuels by catalyzing and cracking animal and vegetable oil

Abstract

The invention discloses a method for producing clean fuels by catalyzing and cracking animal and vegetable oil. The method comprises the following steps: (1), removing impurities from waste animal and vegetable oil serving as raw material, heating up the animal and vegetable oil with impurities removed to 90 DEG C to 95 DEG C by a heater, and dehydrating the heated animal and vegetable oil by a flash evaporation system until the moisture content of the heated animal and vegetable oil is 0.2%; (2), pumping the dehydrated and impurities-removed waste animal and vegetable oil to a catalytic reaction kettle, adding composite catalyst to the catalytic reaction kettle, stirring and heating up to 290 DEG C and keeping the reaction temperature at 290 DEG C to 320 DEG C; and (3), guiding the generated gas to a distillation tower, separating through the distillation tower to obtain bio-gas, bio-gasoline, biodiesel and boiler fuel. Compared with the conventional method for producing biodiesel by an esterification method or an ester exchange method, the method disclosed by the invention has the advantages that the composite catalyst is used to replace concentrated sulfuric acid as a catalyst, carbinol is not needed, almost no environment pollution is caused, the corrosion to the device is avoided and sewage disposal is avoided. Besides, resources are saved, the risk that a dining table due to reflowing of the waste animal and vegetable oil is illegally used in cooking at present can be avoided, and the waste materials are recycled.

Description

technical field [0001] The invention relates to a fuel production method, in particular to a method for catalytically cracking animal and vegetable oils to produce clean fuel. [0002] Background technique [0003] my country is one of the countries with the fastest economic development in the world. The demand for energy has continued to grow at a high speed for a long time. In the current energy consumption structure, in addition to coal to meet self-sufficiency, the supply of oil and natural gas is far from meeting the needs of economic development. , especially oil, my country consumed 250 million tons of oil in 2003, imported as much as 91 million tons from the international market, and the international dependence rate was as high as 36.4%. Data obtained from various channels show that in 2004, my country's oil imports exceeded 100 million tons Off, reaching 120 million tons, the international dependence on oil also exceeded 40%. The rise of international oil prices no...

AI Technical Summary

Problems solved by technology

This technology requires a large amount of concentrated sulfuric acid and methanol in the production process, and has a series of disadvantages such as high requirements for raw materials, heavy pollution in the production process, high energy consumption, low yield, unstable product quality, complicated production process, and serious corrosion of equipment. Difficult to realize industrial production

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