Heat supply and light supplement microalgae culture system and culture method based on thermal power plant

Abstract

The invention discloses a heat supply and light supplement microalgae culture system and method based on a thermal power plant. The system comprises a waste heat heat-supply heat exchanger arranged in the thermal power plant; heat of a low-temperature heat supply network heat exchanger is supplied by the thermal power plant; the output end of the low-temperature heat supply network heat exchanger is connected with the input end of a radiator arranged in a microalgae culture plant through a low-temperature heat supply pipeline; the radiator communicates with a radiating pipe arranged in the microalgae culture plant; a plurality of layers of microalgae cultivation water tanks and light-supplementing illumination units are arranged in the microalgae culture plant, and the electric light-supplementing illumination units are powered by the thermal power plant. The waste heat of the thermal power plant is utilized to realize low-temperature heat supply of the microalgae culture plant system, so that the heat supply cost of the microalgae culture plant is reduced; thermal power plant flue gas waste heat is utilized, so that the temperature influence of thermal power plant flue gas on the surrounding environment is reduced; and meanwhile, the cheap electric power of the thermal power plant is utilized to realize all-weather and any-time light supplementation of the microalgae culture plant, namely artificial sunlight is realized, and the yield of microalgae is increased.

Description

technical field [0001] The invention belongs to the technical field of microalgae cultivation, and in particular relates to a microalgae cultivation system and method for heating and supplementing light in thermal power plants. Background technique [0002] Industrial activities contribute to atmospheric CO 2 At the same time, the greenhouse effect has become a crisis faced by all mankind and difficult to effectively solve. The unique physiological characteristics of microalgae are the effective absorption of CO 2 , to solve the problem of greenhouse gases provides an opportunity. As a class of single-celled microorganisms with extremely high photosynthetic efficiency, microalgae can not only absorb CO efficiently through photosynthesis 2 , and it can be converted into various bioactive components such as protein, oil, polysaccharide, etc., thus it is expected to build a new emission reduction technology with good social and economic benefits. [0003] Since the early 19...

AI Technical Summary

Problems solved by technology

However, since the industrial production of Spirulina still adopts the simple and low-cost open pond culture mode, the supplemented CO 2 Gas will escape and be wasted in large quantities

[0004] Although compared with freshwater cultured spirulina, seawater cultured spirulina can significantly improve its quality and save a lot of freshwater resources, but the current culture of spirulina is still dominated by freshwater culture, the main reason is that the production cost of seawater cultured spirulina is high

[0005] At present, in the cultivation of microalgae and spirulina, natural sunlight is used to supplement light, so it is limited by light conditions and regions

The growth of microalgae in the culture medium has high temperature requirements. Generally, the temperature of the culture medium is required to be above 25 degrees, and the temperature of the culture medium of some high-priced microalgae products can reach about 35 degrees. During the breeding process, it is necessary to continuously heat the microalgae breeding plant or greenhouse, and the current common heating methods are small coal stoves or gas boilers with high pollution and high emissions. Not only the energy cost is high, but also the pollutant emissions and carbon The emissions are relatively high, and generally do not meet the local environmental protection and carbon emission reduction requirements

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