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A device and method for cleaning carbon dioxide in industrial waste gas by using microalgae

A carbon dioxide and clean industry technology, applied in chemical instruments and methods, separation methods, air quality improvement, etc., can solve the problems of high corrosiveness, low selectivity, potential impact and hazards of the earth's crust, etc., so as to improve efficiency and avoid churn effect

Active Publication Date: 2017-01-25
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The potential impact of physical landfill on the earth’s crust has not been ruled out; the commonly used chemical adsorption reagent monoethanolamine (MEA) and its derivative chemical substances have defects such as low selectivity, high corrosion, complicated application equipment, and reduced combustion efficiency (about 30 % of fuel)
These potential disadvantages of physical and chemical methods are limiting their widespread application

Method used

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  • A device and method for cleaning carbon dioxide in industrial waste gas by using microalgae

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Embodiment 1

[0030] A device that uses microalgae to clean carbon dioxide in industrial waste gas. The photobioreactor uses a tubular microalgae culture system with suitable temperature and light. The culture liquid circulation system is coupled with a wastewater treatment device. Industrial wastewater was used as the culture solution, and the heat-resistant chlorella Chorella sp. was selected as the cultured microalgae.

[0031] The collection and production capacity system uses an air flotation device to settle and collect microalgae. The collection and production capacity system is also coupled with a microalgae utilization device, and the microalgae utilization device is composed of a microalgae hydrothermal reaction system and an anaerobic fermentation system. The microalgae hydrothermal reaction system includes a preheating system, a plug flow hydrothermal reactor, and a three-phase separation system.

[0032] The microalgae enrichment liquid is further utilized through a microalgae...

Embodiment 2

[0036]The photobioreactor of this embodiment uses a column type microalgae culture system with suitable temperature and light, and the microalgae is heat-resistant chlorella Chorella sp. The culture solution circulation system oxidizes the relevant inhibitory components in the treated steel mill wastewater, and adds trace elements and vitamins, injects them into the microalgae culture system with suitable temperature and light to mature, and then enters the collection and production capacity system for precipitation by the air flotation device. The precipitated microalgae are directly fed into the microalgae anaerobic fermentation system, and the anaerobic fermentation produces biogas. The water separated by the energy collection system enters the culture fluid circulation system, which can be recycled for the cultivation of microalgae, or recycled as industrial water.

Embodiment 3

[0038] The photobioreactor of this embodiment uses a column type microalgae culture system with suitable temperature and light, and the microalgae is heat-resistant chlorella Chorella sp. Inject the BG11 culture solution into a column microalgae culture system with suitable temperature and light. After the microalgae are matured in the culture system, they are passed into the collection and production capacity system and settled by the air flotation device. The collected microalgae are directly fed into the microalgae anaerobic fermentation system for anaerobic fermentation to produce biogas. The culture solution circulation system processes the culture solution separated by the collection and production system, eliminates the relevant inhibitory components, adds nutrients such as trace elements and vitamins, and circulates the culture solution back to the column microalgae cultivation system.

[0039] The microalgae in this example can effectively clean and utilize the carbo...

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Abstract

The invention discloses a device and a method for cleaning carbon dioxide in industrial waste gas via microalgae. The device mainly comprises a microalga cleaning carbon dioxide system used for culturing microalgae to absorb carbon dioxide in the industrial waste gas, a collection and energy production system communicated with the microalga cleaning carbon dioxide system and used for harvesting ripe microalgae, and a culture solution circulating system communicated with the collection and energy production system; the culture solution circulating system is further communicated with the microalga cleaning carbon dioxide system to form a loop. According to the invention, carbon dioxide in the industrial waste gas is cleaned and utilized by the microalgae, and wastewater needing to be discharged in an industrial production process is effectively utilized by the culture solution circulating system to effectively avoid the loss of water and nutrients during industrial production; economic utilization of the microalgae is achieved by the collection and energy production system to improve the carbon dioxide treatment efficiency of the microalgae within a limited space to the maximum.

Description

[0001] Technical field: [0002] The invention relates to the field of microalgae cultivation engineering and the field of environmental protection, in particular to a device and method for using microalgae to clean carbon dioxide in industrial waste gas. [0003] Background technique: [0004] Excessive consumption of fossil fuels leads to excessive accumulation of industrial waste gas. According to statistics, the global emission of carbon-containing waste gas has exceeded 97 billion tons per year; among them, emissions from energy-intensive industries such as synthetic ammonia industry, petroleum refining industry, steel mills, and wood pulp and paper industry Carbon oxides are particularly problematic. Carbon oxides emitted by these industries place a heavy burden on the environment. The "greenhouse effect" and "smog" have seriously affected the environment on which we live, and it is imperative to develop effective industrial waste gas reduction technologies. [0005] Mi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/84B01D53/62B01D53/96
CPCY02A50/20
Inventor 袁振宏郭颖许敬亮周卫征梁翠谊徐惠娟张宇庄新姝王忠铭
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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