Treatment method capable of reducing emission of carbon dioxide
A carbon dioxide and treatment method technology, applied in chemical instruments and methods, gaseous effluent wastewater treatment, gas treatment, etc., can solve problems such as environmental pollution, poor effect, and poor effect of absorbing carbon dioxide, so as to improve solubility, reduce emissions, Improve poor performance
Inactive Publication Date: 2018-02-16
林正仁
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Problems solved by technology
[0004] In view of the technical defects existing in the prior art, the purpose of the present invention is to improve the poor effect of general fresh water or sea water on absorbing carbon dioxide and the problems of environmental pollution caused by direct discharge of waste water, thereby efficiently reducing the emission of carbon dioxide
[0006] According to the present invention, by using the technical means of an alkaline aqueous solution with a concentration lower than 20% by weight, the problem of poor carbon dioxide absorption in the prior art using fresh water or seawater can be greatly improved, and the water consumption of the alkaline aqueous solution can be saved to achieve The effect of saving water
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[0019] see figure 1 As shown, firstly, the waste gas containing carbon dioxide is collected, and after dust collection, denitrification, denitrification, and cooling treatment, it is discharged into the carbon dioxide absorption equipment. The carbon dioxide in the exhaust gas is absorbed by the circulating spraying method, and the sodium bicarbonate aqueous solution (that is, the weakly acidic aqueous solution) containing carbonate ions, bicarbonate ions and sodium ions and the treated exhaust gas are obtained. Wherein, the pH value of the sodium bicarbonate aqueous solution is about 5 to 6.
[0020] Here, 38.5 kg of carbon dioxide can be absorbed by using 1000 kg of sodium hydroxide aqueous solution with a concentration of 3.5 weight percent. In the same amount of waste gas, the content of carbon dioxide in the treated waste gas is reduced from 45 ppm to 0.03 ppm before being discharged. It can be seen that absorbing carbon dioxide with an aqueous solution of sodium hydroxi...
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The invention relates to a treatment method capable of reducing the emission of carbon dioxide. The treatment method comprises the following steps: allowing an alkali aqueous solution with a concentration lower than 20 wt% to absorb carbon dioxide containing waste gas so as to obtain a weak acid aqueous solution rich in carbonate ions and bicarbonate ions; and by utilizing the characteristic of carbon sequestration of microalgae through photosynthesis, adding the weak acid aqueous solution into a microalgae culturing tank, and providing a carbon source needed by the microalgae for photosynthesis. The treatment method provided by the invention has the following advantages: through the alkali aqueous solution, carbon dioxide is effectively absorbed; through microalgae culturing for photosynthesis, the problems of poor carbon dioxide absorbing effect of general freshwater or seawater and environmental pollution due to direct discharge of wastewater are improved; thus, the emission of thecarbon dioxide is reduced with high efficiency.
Description
technical field [0001] The invention relates to a method for purifying waste gas, in particular to a method for reducing the emission of carbon dioxide in the waste gas. Background technique [0002] Due to the large-scale development of human industry and the emission of greenhouse gases, the problem of global warming is becoming more and more serious. The rising global temperature is enough to affect the survival of species in the world. Therefore, how to reduce greenhouse gas emissions has become a common goal of the world. At present, various solutions to reduce carbon dioxide emissions have been developed, such as improving fuel efficiency or carbon dioxide capture and adsorption, and related patents include TW201100532 and TW201317045 in Taiwan, China. [0003] In the prior art, the way to reduce the carbon dioxide content is to use fresh water or sea water as a flushing agent, and use water washing technology to flush the waste gas containing carbon dioxide, so as to ...
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IPC IPC(8): B01D53/77B01D53/62C02F3/32C02F103/18
CPCB01D53/62B01D53/77B01D2257/504C02F3/32C02F2103/18
Inventor 林正仁
Owner 林正仁