Self-cleaning spiral airlift inner loop flow photobioreactor

Abstract

The invention provides a self-cleaned spiral airlift inner-loop photobioreactor, which comprises a reactor main body and a multi-dimensional stereoscopic gas distributor. The multi-dimensional stereoscopic gas distributor includes multi-row and multi-angle bottom annular pipes and tubular distributing pipes, wherein the annular pipes and the tubular distributing pipes mutually communicate. A spiral jet flow in an algae liquid area is coupled by bottom airlift, and spiral upward flowing is achieved, a uniform flow field, without a dead area, is achieved in the reactor, so that a gas-liquid hybrid heat and mass transfer process is enhanced; with the structural design, under the irradiation of internal and external controllable light sources, alternate flowing of microalgae in a radial direction is promoted, so that an alternate bright-dark radiation effect is achieved, a light-shading effect is greatly relieved, a flash effect is enhanced and the efficiency of cultivating the microalgae and immobilizing carbon dioxide is improved; and by virtue of the multi-angle spiral jet flow, a good effect on scouring the inner wall of the reactor can be achieved, so that the phenomenon that the algae is attached to the wall is effectively solved, light transmittance is enhanced, the cost of such post-treatment as collecting the algae and the like is reduced and the economical efficiency of cultivating the algae in a large scale is greatly improved.

Description

technical field [0001] The invention relates to the field of biochemical industry, is particularly suitable for high-density cultivation of microalgae, and particularly relates to a spiral air-lift internal circulation reactor with high-efficiency mass and heat transfer characteristics and self-cleaning wall surface function. Background technique [0002] Microalgae can convert CO through photosynthesis 2 And water is converted into various organic compounds (such as pigments, proteins, amino acids, vitamins and fatty acids, polysaccharides, etc.) that we need in life. Due to the high efficiency of light utilization by algae and the rapid and efficient absorption of nutrients from the surrounding environment (such as CO 2 , nitrogen, phosphorus, etc.) and the ability to transform into organic compounds, making algae a huge economic potential to solve food agriculture and energy crises in the future. At the same time, algae farming has a significant effect on CO 2 It is of...

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Problems solved by technology

[0006] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a self-cleaning spiral air-lift inner loop flow photobioreactor, which is used to overcome the relatively small surface area for receiving light in the prior art; In the state of photoinhibition, photosynthesis cannot be carried out; the simple air lift makes the algal liquid receive uneven light time, the shading effect between the microalgae is serious, and the light energy utilization rate is low; the algae hanging on the wall reduces the light transmittance and forms dead algae areas, etc. question

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