Method and system for cultivating algae to produce biodiesel by using power plant exhaust smoke and ash

Abstract

The invention discloses a method and a system for cultivating algae to produce biodiesel by utilizing smoke exhaust and ash content of a power plant. The algae culture solution is transferred to the algae culture container, and the flue gas discharged from the power plant boiler is diverted, and the diverted CO 2 Send it into the algae culture container and provide the culture conditions required for algae culture; crush and cut the large algae in the cultivated mature algae group, and stir and mix with the microalgae in the cultivated mature algae group to form algae slurry; convey The algae slurry is put into the high-pressure reactor, and the fourth-stage steam extraction of the steam turbine of the power plant is passed into the high-pressure reactor until the high-pressure reactor is in a supercritical state, so that the algae undergoes hydrothermal liquefaction to generate biodiesel. The invention makes full use of various resources of the power plant, efficiently converts them into usable resources, reduces the cost of algae cultivation and biodiesel production, and improves energy utilization efficiency.

Description

technical field [0001] The invention belongs to the technology of energy utilization, and relates to algae cultivation and biodiesel preparation technology, in particular to a method for cultivating algae to prepare biodiesel by utilizing smoke exhaust and ash from a power plant, and also relates to a system using the method. Background technique [0002] my country's coal production and consumption account for a large proportion in the world. Among the various forms of power generation in China, coal-fired power generation still occupies a dominant position. However, coal-fired power generation has the following problems: [0003] (1) During the combustion of coal, CO will be produced, including 2 The flue gas with other components has exacerbated the negative impact on the environment such as the greenhouse effect. Therefore, the treatment of flue gas and CO 2 The collection and utilization of has received extensive attention from the industry. [0004] (2) The coal co...

AI Technical Summary

Problems solved by technology

[0004] (2) The coal consumption of the power plant is huge, if the ash produced by combustion cannot be fully utilized as a resource, it will not only waste resources, but also cause pollution to the environment

[0006] The existing methods for utilizing the flue gas and ash discharged from power plants are either only utilizing the flue gas or only utilizing the ash. Not only is the energy utilization efficiency not high, but the equipment involved is complex in structure and high in cost. Not suitable for widespread promotion and application

Images