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Method and apparatus for preparing food level liquid carbon dioxide with flue gas

A technology of liquid carbon dioxide and carbon dioxide, which is applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of not meeting the quality standards of food-grade carbon dioxide, and achieve the effect of simple and reliable equipment, high product purity and good stability

Active Publication Date: 2009-01-14
杭州快凯高效节能新技术有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the carbon dioxide gas recovered from flue gas capture contains impurities such as water, sulfur, nitrate or hydrocarbons, which do not meet the quality standards of food-grade carbon dioxide

Method used

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  • Method and apparatus for preparing food level liquid carbon dioxide with flue gas
  • Method and apparatus for preparing food level liquid carbon dioxide with flue gas

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Embodiment Construction

[0020] A method and device for preparing food-grade liquid carbon dioxide from flue gas, comprising a buffer, a cooling dehumidifier, a compressor, a denitrification tower, a desulfurization tower, a drying tower, a condenser, a purification tower, a subcooler, storage tank, etc. The outlet of the drying tower is connected with the top inlet of the condenser, the bottom outlet of the condenser is connected with the upper inlet of the purification tower, the liquid carbon dioxide outlet of the purification tower is connected with the inlet of the subcooler, and the top air outlet of the purification tower is connected with the outlet of the drying tower The top nozzle is connected. The gas ammonia outlet of the condenser, the purification tower and the subcooler are connected with the gas ammonia inlet of the cooling dehumidifier. The liquid ammonia pipelines of the condenser, the purification tower and the subcooler are connected in parallel.

[0021] The captured and recove...

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Abstract

The invention discloses a method of using flue gas to prepare food-grade liquid carbon dioxide, comprising steps that the carbon dioxide is collected and recovered as raw material to be treated by cooling, drying, compression, denitration, desulfurization and de-hydrocarbon, and is further treated by drying, purification and cooling to obtain the food-grade liquid carbon dioxide; a device to be adopted comprises a cooling dehumidifier, a compressor, a denitration tower, a desulfurization tower, a de-hydrocarbon tower, a drying tower, a condenser, a purification tower, a subcooler and a storage tank, etc., which are all connected by pipelines; the food-grade liquid carbon dioxide prepared by using the method and the device has advantages of high purity, small power consumption and low cost, etc.; the method can be widely used in the occasions of making use of the flue gas which is emitted from coal-fired power plants, cement factories, lime plants and coal-fired boilers and then collected and recovered to prepare food-grade liquid carbon dioxide.

Description

technical field [0001] The invention relates to a method and device for preparing food-grade liquid carbon dioxide, in particular to a method for preparing food-grade liquid carbon dioxide by collecting and recovering flue gas discharged from coal-fired power plants, cement plants, lime kilns and coal-fired boilers. The device is suitable for the enrichment of carbon dioxide in the waste gas discharged from coal-fired power plants, cement plants, lime kilns and coal-fired boilers. Background technique [0002] The greenhouse effect is one of the most important factors affecting the living environment of human beings. Industrial waste gas carbon dioxide and methane emitted by animals and plants are the most important sources of greenhouse gases. The governments of many countries have taken measures to reduce carbon dioxide emissions according to the requirements of the "Kyoto Protocol". Among them, the emission of carbon dioxide from coal-fired power plants, cement plants, a...

Claims

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Application Information

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IPC IPC(8): C01B31/20C01B32/50
Inventor 沈建冲徐美南杨同何东
Owner 杭州快凯高效节能新技术有限公司
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