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Process for producing food-grade carbon dioxide by virtue of resolving gas of decarburization procedure of synthesis ammonia MDEA method

A technology for carbon dioxide and ammonia synthesis, applied in the chemical industry, can solve the problems of aggravating the greenhouse effect, poor product quality, waste of precious carbon dioxide resources, etc., and achieve the effects of simple and reliable process, low energy consumption and low cost

Active Publication Date: 2017-01-25
CHONGQING TONGHUI GAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The massive emission of carbon dioxide not only has a bad impact on the living environment of human beings, but also aggravates the "greenhouse effect"; it also causes a serious waste of carbon dioxide, a precious resource.
[0004] However, due to preparation technology and market constraints, my country's food-grade carbon dioxide development and utilization technology is still relatively backward, and the product quality is also poor

Method used

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  • Process for producing food-grade carbon dioxide by virtue of resolving gas of decarburization procedure of synthesis ammonia MDEA method
  • Process for producing food-grade carbon dioxide by virtue of resolving gas of decarburization procedure of synthesis ammonia MDEA method

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Effect test

Embodiment 1

[0026] The process for producing food-grade carbon dioxide from the analytical gas in the MDEA decarburization process of synthetic ammonia comprises the following steps:

[0027] A. Compression process: The analytical gas from the MDEA decarburization process of synthetic ammonia is washed by a water washing tower and then enters a compressor for three-stage compression until the pressure of the gas is 2.2MPa and the temperature is 2 content of ≤30mg / L;

[0028] B. Purification process: the gas cooled by the pre-cooler enters the adsorption tower, and the content of methanol in the gas is adsorbed by activated carbon with a particle size of 3.0 mm and a strength ≥ 90% < 70 ppm;

[0029] C. Drying process: The gas after adsorption treatment then enters the dryer, and the content of methanol is adsorbed to <8ppm under the action of molecular sieves with a particle size of 3mm, compressive strength ≥ 60N / particle, and bulk density ≥ 0.64g / mL. The moisture content is adsorbed to ...

Embodiment 2

[0033] The process for producing food-grade carbon dioxide from the analytical gas in the MDEA decarburization process of synthetic ammonia comprises the following steps:

[0034] A. Compression process: The analytical gas from the MDEA decarburization process of synthetic ammonia is washed by a water washing tower and enters the compressor for three-stage compression until the pressure of the gas is 2.2MPa and the temperature is 2 content of ≤30mg / L;

[0035] B. Purification process: the gas cooled by the pre-cooler enters the adsorption tower, and the methanol content in the gas is adsorbed by activated carbon with a particle size of 3.5mm and a strength ≥ 90% < 70ppm;

[0036] C. Drying process: The gas after adsorption treatment then enters the dryer, and the content of methanol is adsorbed to <8ppm under the action of molecular sieves with a particle size of 5mm, compressive strength ≥ 60N / particle, and bulk density ≥ 0.64g / mL. The moisture content is adsorbed to <15ppm, ...

Embodiment 3

[0040] The process for producing food-grade carbon dioxide from the analytical gas in the MDEA decarburization process of synthetic ammonia comprises the following steps:

[0041] A. Compression process: The analytical gas from the MDEA decarburization process of synthetic ammonia is washed by a water washing tower and then enters a compressor for three-stage compression until the pressure of the gas is 2.2MPa and the temperature is 2 content of ≤30mg / L;

[0042] B. Purification process: the gas cooled by the pre-cooler enters the adsorption tower, and the methanol content in the gas is adsorbed by activated carbon with a particle size of 3.2 mm and a strength ≥ 90% < 70 ppm;

[0043] C. Drying process: The gas after adsorption treatment then enters the dryer, and the content of methanol is adsorbed to <8ppm under the action of molecular sieves with a particle size of 3.5mm, a compressive strength ≥ 60N / particle, and a bulk density ≥ 0.64g / mL , the moisture content is adsorbed...

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Abstract

The invention discloses a process for producing food-grade carbon dioxide by virtue of resolving gas of a decarburization procedure of a synthesis ammonia MDEA method. The process comprises the following steps: (A) a compression procedure; (B) a purification procedure; (C) a drying procedure; and (D) a purification process. According to the process, the recycling of carbon dioxide is realized. The process is simple and reliable, the energy consumption required by the production is low, the cost is low, and the quality of produced food-grade carbon dioxide is good and is completely in conformity with relevant quality standards.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a process for producing food-grade carbon dioxide by utilizing the analytical gas in the MDEA decarburization process of synthetic ammonia. Background technique [0002] Carbon dioxide is an important raw material for industrial production, widely used in metallurgy, steel, petroleum, chemical industry, electronics, food, medical, food and other fields, especially in the modified atmosphere preservation of food, the application of beverage industry, the application of food refrigeration and freezing, Supercritical extraction and other fields. There are two types of carbon dioxide-rich gas sources available for industrial recovery, namely natural carbon dioxide gas sources such as carbon dioxide gas fields, petroleum dissolved gas, and natural gas, and industrial by-product gas sources such as flue gas, chemical plant tail gas, and biological fermentation gas. [0003] ...

Claims

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Application Information

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IPC IPC(8): C01B32/50
CPCC01P2006/80
Inventor 黄加斗
Owner CHONGQING TONGHUI GAS
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