CO2 Capture System Multi-Washer Amine Entrapment

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Solution Overview

Problem

Carbon dioxide capture systems face inefficiencies in reducing the amount of amine entrained by combustion exhaust gas, leading to amine release into the air, particularly due to the entrainment of mist amine which is not effectively captured by traditional methods.

Innovation Solution

The system incorporates multiple washers with different cleaning liquids and pressures to capture amine entrained by combustion exhaust gas, utilizing spray nozzles to increase the particle size of cleaning liquid droplets and enhance gas-liquid contact, thereby improving the efficiency of amine capture.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional single-washer configuration is used, then device complexity is low, but amine capture efficiency is insufficient

Engineering Contradiction:

Improveamine capture efficiencyVSAvoidwasher configuration complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The single washer is divided into multiple washers (first washer, second washer, and optionally third washer) arranged in series. Each washer is equipped with spray nozzles that spray cleaning liquid onto the combustion exhaust gas flow path. This segmentation allows progressive capture of amine from the gas stream, with each washer handling a portion of the capture task, thereby improving overall capture efficiency while maintaining manageable system complexity through modular design.

Inventive Principle:

Principle #1Segmentation

2Productivity

If spray nozzles are used to increase cleaning liquid droplet particle size, then gas-liquid contact efficiency is improved, but energy consumption increases

Engineering Contradiction:

Improvegas-liquid contact efficiencyVSAvoidenergy consumption of spray nozzles

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

Different spray nozzles are positioned at different locations within the washers to create localized zones of enhanced gas-liquid contact. The spray nozzles are arranged to target specific regions where amine concentration is highest in the combustion exhaust gas. This localized approach concentrates energy input where it is most needed for amine capture, rather than uniformly distributing energy throughout the entire washer, thereby improving productivity while controlling overall energy consumption.

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This configuration significantly reduces the amount of amine released into the air by effectively capturing mist amine and gas amine, improving the overall efficiency of the carbon dioxide capture process.

Implementation Method 1

spray nozzles to increase the particle size of cleaning liquid droplets

Methodology Applied

Scientific EffectAtomization:

Implementation Method 2

clean the combustion exhaust gas by using first cleaning liquid to capture the amine entrained by the combustion exhaust gas

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Data Source

PatentUS11235277B2Carbon dioxide capture system and method of operating carbon dioxide capture system

Publication Date: 2022.02.01 KK TOSHIBA

AI summary

A carbon dioxide capture system according to an embodiment includes a carbon dioxide capturer, a first washer, and a second washer. The first washer includes a spray configured to spray first cleaning liquid supplied under first pressure. The second washer includes a cleaning liquid diffuser configured to diffuse and drop second cleaning liquid supplied under second pressure lower than the first pressure.