Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and system for recycling alcohol and high-purity carbon dioxide by using alcohol tail gas as raw material

A carbon dioxide, high-purity technology, applied in chemical instruments and methods, preparation of organic compounds, separation/purification of hydroxyl compounds, etc., to achieve high recovery rate, improve economic benefits, save water and steam

Pending Publication Date: 2021-07-23
JIANGXI JIANGAN TECH CO LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, adapt to the actual needs, and provide a method and system for recovering alcohol and high-purity carbon dioxide using alcohol tail gas as a raw material. The present invention can effectively recycle alcohol and carbon dioxide in the alcohol tail gas, avoiding the traditional recycling The carbon dioxide emission in the alcohol method puts pressure on the environment and improves the economic benefits of the enterprise

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system for recycling alcohol and high-purity carbon dioxide by using alcohol tail gas as raw material
  • Method and system for recycling alcohol and high-purity carbon dioxide by using alcohol tail gas as raw material
  • Method and system for recycling alcohol and high-purity carbon dioxide by using alcohol tail gas as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: A kind of system that utilizes alcohol tail gas as raw material recovery alcohol and high-purity carbon dioxide, see Figure 1 to Figure 3 .

[0032] Including a washing tower T102, the washing tower T102 is provided with a feed gas inlet 101, a scrubbing gas outlet 1201 at the top, a condensate outlet at the bottom, and a water replenishment port 103 at the top, and the condensate outlet is connected to the condensate pump P401 , the outlet of the condensate pump P401 is divided into two paths, wherein the first path is connected to the water inlet to form a cycle, and the second path is the condensate discharge outlet 102, which also includes a washing liquid cooler E401, and the materials in the washing liquid cooler E401 The heat exchange tubes are connected in series on the first pipeline. The raw gas enters the washing tower through the raw gas inlet 101 and is absorbed by the water at the top of the tower.

[0033] It also includes a carbon dioxid...

Embodiment 2

[0041]Embodiment 2, a kind of method utilizing alcohol tail gas as raw material recovery alcohol and high-purity carbon dioxide, this method implements on the system described in embodiment 1, comprises the steps:

[0042] The gas source used in this project comes from the fermentation tail gas of corn alcohol production, and the CO in the raw gas 2 The purity is generally 92%~95%, and the rest are alcohols (methanol, ethanol), aldehydes (formaldehyde, acetaldehyde), N 2 , and O 2 Impurities, saturated with moisture content.

[0043] Table 1, Alcoholic fermentation gas impurity components

[0044] name unit content Remark carbon dioxide %v / v 92.9 ethanol ppmv / v 5098 total sulfur ppmv / v 15 Aldehydes ppmv / v 20 hydrogen sulfide ppmv / v 6.3 Others (calculated by ethanol) ppmv / v 82.16 oxygen %v / v 0.81 nitrogen %v / v 3.36 Moisture saturation

[0045] (1) Condensation and s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method and a system for recovering alcohol and high-purity carbon dioxide by using alcohol tail gas as a raw material. The method can effectively recover alcohol and carbon dioxide in the alcohol tail gas, and the method comprises the following steps: (1) condensing and washing raw material gas to separate water-soluble alcohol and water-insoluble carbon dioxide; (2) compressing and condensing carbon dioxide; (3) conducting low-temperature rectification for discharging alcohol and H2O which are higher than the boiling point of carbon dioxide as alcohol, and discharging carbon dioxide; (4) performing condensation on the carbon dioxide, performing low-temperature rectification , discharging a heavy component as alcohol, and discharging a light component carbon dioxide; and (5) performing condensation on the carbon dioxide, performing low-temperature rectification, discharging light components, and discharging heavy components high-purity carbon dioxide. The system comprises a washing tower used for implementing the step (1), comprises a carbon dioxide compressor, a condenser and a desulfurization tower used for implementing the step (2), comprises a heavy component removal tower used for implementing the step (3), and further comprises a light component removal tower used for implementing the step (4).

Description

technical field [0001] The invention relates to the technical field of alcohol tail gas recovery, in particular to a method and system for recovering alcohol and high-purity carbon dioxide by using alcohol tail gas as raw materials. Background technique [0002] At present, water absorption is generally used for the recovery of ethanol tail gas. This method requires the use of steam. This method generally only recovers alcohols, and in the implementation, ethanol and other gases will still be entrained in the steam, resulting in low recovery efficiency. Studies have confirmed that , the carbon dioxide content in the alcohol tail gas reaches more than 90%, but the existing technology cannot effectively recover the carbon dioxide, resulting in a waste of resources, and the direct emptying method will have an impact on the atmospheric environment. [0003] Based on this, the present invention proposes a method and system for recovering alcohol and high-purity carbon dioxide by ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/50C07C29/74C07C29/76C07C29/80
CPCC01B32/50C07C29/74C07C29/76C07C29/80
Inventor 万里鹏杨柳
Owner JIANGXI JIANGAN TECH CO LTD