Method for reducing exhausted carbon dioxide by using microalgae

A technology of carbon dioxide and microalgae, applied in chemical instruments and methods, separation methods, and separation of dispersed particles, can solve the problems of reducing the rate of microalgae to fix CO2, complex structure of photobioreactor, and low efficiency of gas-liquid mixing. Achieve the effect of improving gas-liquid mixing efficiency and circulation degree, increasing fixed speed, and occupying a small area

Inactive Publication Date: 2009-10-21
武钢集团有限公司 +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used photobioreactors for photosynthesis of microalgae are either complex in structure, difficult to operate, or low in gas-liquid mixing efficiency, which also reduces the rate of CO2 fixation by microalgae

Method used

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  • Method for reducing exhausted carbon dioxide by using microalgae
  • Method for reducing exhausted carbon dioxide by using microalgae
  • Method for reducing exhausted carbon dioxide by using microalgae

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0035] Embodiment 1: refer to figure 1 , figure 2 , in this embodiment, the industrial exhaust gas adopts CO 2 For the flue gas with a concentration of about 25%, the flue gas is first passed through the scrubber 1 and added with gas scrubbers to remove fine particles, other solid substances, and some acid gases, other organic and inorganic substances in the flue gas, so that Dust content reduced to 2mg / Nm 3 Afterwards, pressurize to 0.1-2.3MPa through compressor 2, then cool the gas temperature to 20-30°C through cooler 3, the cooled gas passes through flow meter 5 and then is sent to gas filter regulator 4, and the supplementary gas passes through Part of the recycled converted gas discharged from the ascending photobioreactor 7 makes the CO 2 The concentration is reduced to 15% to 20%, and the gas to be treated that meets the needs of microalgae is obtained, and then the gas to be treated is sent into the airlift photobioreactor 7, and after entering the glass tank 14 o...

Embodiment 2

[0040] Example 2: In the gas adjustment step, the air is directly used to adjust the CO in the gas 2 Concentration, described microalga selects Scenedesmus obliquus (Scenedesmus obliquus) for use, all the other are the same as embodiment 1.

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Abstract

The invention relates to a method for reducing exhausted carbon dioxide by using microalgae, and solves the problems of high treatment cost, large energy consumption, poor environmental protection and the like in the prior process for reducing exhausted carbon dioxide. The invention adopts a technical proposal that the method comprises the following steps: removing dust, washing, pressurizing and adjusting industrial exhausted gas containing CO2 to obtain gas to be treated meeting microalgae requirement; and carrying out microalgae conversion for the gas to be treated to fix the CO2 and reduce the concentration of the CO2 in the exhausted gas. The method has the advantages of simple process, simple and convenient operation, low treatment cost, less energy consumption and environmental protection; and the rate of reducing the exhausted CO2 in the industrial exhausted gas can reach over 50 percent.

Description

technical field [0001] The invention relates to a method for reducing carbon dioxide emissions, specifically using microalgae to reduce CO in industrial exhaust gas 2 method of concentration. Background technique [0002] Carbon dioxide (CO2) in industrial emissions 2 ) Emission reduction has become the focus of environmental issues that the governments of various countries are concerned about. How to fix CO in industrial exhaust gas 2 , so that the CO 2 Conversion to other substances to reduce CO 2 Direct discharge into the atmosphere is an urgent problem to be solved. In particular, the use of environmentally friendly technologies to convert CO 2 Achieving carbon emission reduction has become one of the goals pursued by the current industry. [0003] According to the classification of the characteristics of the current technology, carbon dioxide emission reduction methods can be roughly divided into three categories: physical sequestration, chemical immobilization a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/84B01D53/62
CPCY02A50/20
Inventor 吴高明杨忠华陈明明李轩科
Owner 武钢集团有限公司
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