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

A biodiesel, algae technology, applied in microorganism-based methods, biochemical equipment and methods, bioreactors/fermenters for specific purposes, etc., can solve the problem of low energy utilization efficiency, unsuitable promotion and application, and complex equipment structure and other problems, to achieve the effect of improving energy utilization efficiency, facilitating widespread promotion and application, and reducing the degree of environmental pollution

Active Publication Date: 2021-12-07
SOUTH CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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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

Method used

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

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Embodiment Construction

[0034] The present invention is a method for producing biodiesel by cultivating algae with smoke exhaust and ashes from a power plant, comprising the following steps:

[0035] ⑴ Modulation of algae culture solution: the ash produced by the combustion of power plant boilers and boiler circulating water are used as the main components of the algae culture solution to prepare the algae culture solution;

[0036] ⑵Cultivate algae: transport the algae culture solution to the algae culture container, divert the flue gas exhausted from the power plant boiler, and divert the CO 2 Send it into the algae culture container, and provide the culture conditions required for algae culture to carry out algae culture. The culture conditions include light intensity, light cycle, temperature, CO2 concentration and the pH value of the algae culture solution.

[0037] (3) Making algae pulp: crushing and cutting the macroalgae in the cultivated mature algae group, and stirring and mixing with the m...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/64C12M1/00C12M1/04C12M1/02C12R1/89
CPCC12M21/02C12M23/58C12M27/02C12M29/06C12M45/02C12P7/649Y02E50/10Y02P20/10Y02P20/54
Inventor 徐姗楠王爽孙超群张喆
Owner SOUTH CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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