Gasification Quench Flow Damping Mechanisms

Solution Overview

Problem

Gasification systems, such as quench units and scrubbers, face inefficiencies due to flow fluctuations in cooling processes, leading to incomplete removal of ash and particulates, which affects the quality of syngas produced.

Innovation Solution

Incorporation of flow damping mechanisms within gasification system components, including damping plates, rings, and bars, to restrict flow areas and dissipate energy from fluctuations, thereby stabilizing the cooling fluid and gas flow, reducing pressure and flow rate variations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If flow damping mechanisms are added to restrict flow areas, then flow fluctuations are reduced and cooling efficiency is improved, but device complexity increases

Engineering Contradiction:

Improveflow stabilityVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The quench unit is divided into multiple chambers (first chamber, second chamber, third chamber) with distinct functions. Flow damping mechanisms are specifically placed in the second chamber to segment the flow path and dampen fluctuations without complicating the entire system. This segmentation allows targeted intervention in the flow path where damping is most needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Flow damping mechanisms act as intermediary elements between the dip tube and the cooling fluid pool. These mechanisms (such as baffles or damping plates) mediate the interaction between the high-velocity gas stream and the cooling fluid, reducing flow fluctuations and improving heat transfer efficiency without requiring complete system redesign.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If flow damping mechanisms are incorporated to stabilize cooling fluid, then quench unit efficiency is enhanced, but manufacturing complexity increases

Engineering Contradiction:

Improvequench unit efficiencyVSAvoidmanufacturing complexity

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The quench unit is divided into multiple chambers (first chamber, second chamber, third chamber) with distinct functions. Flow damping mechanisms are specifically placed in the second chamber to segment the flow path and dampen fluctuations without complicating the entire system. This segmentation allows targeted intervention in the flow path where damping is most needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Flow damping mechanisms act as intermediary elements between the dip tube and the cooling fluid pool. These mechanisms (such as baffles or damping plates) mediate the interaction between the high-velocity gas stream and the cooling fluid, reducing flow fluctuations and improving heat transfer efficiency without requiring complete system redesign.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Stress or pressure

If flow area is restricted through damping mechanisms, then pressure variations are reduced, but fluid flow resistance increases

Engineering Contradiction:

Improvepressure stabilityVSAvoidfluid flow rate

Core Design Contradiction:

Stress or pressureVSProductivity

Solution Approach 1:

Flow damping mechanisms are strategically placed only in the second chamber where flow fluctuations are most problematic, rather than restricting flow throughout the entire system. This local intervention dampens pressure variations in the critical region while maintaining adequate flow rates in other chambers. The damping mechanisms create localized flow resistance only where needed to stabilize pressure.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The flow damping mechanisms provide partial restriction to the flow path, creating enough resistance to dampen pressure fluctuations and improve mixing, but not so much resistance as to significantly reduce overall flow rate. The damping plates or baffles are designed with optimal geometry to achieve the right balance between pressure stabilization and flow maintenance.

Inventive Principle:

Principle #16Partial or excessive action

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

The implementation of flow damping mechanisms significantly reduces flow fluctuations, enhancing the efficiency of quench units and scrubbers by ensuring consistent cooling and removal of impurities, leading to improved syngas quality and system performance.

Implementation Method 1

flow damping mechanisms disposed in one or more of the inner chamber, the outer chamber, or therebetween, and configured to dampen flow of the cooling fluid, the another fluid, or both within the quench unit

Methodology Applied

Scientific EffectTurbulence: Turbulence

Implementation Method 2

flow damping mechanisms...configured to dampen flow...reduce a flow area through the outer chamber by at least approximately 50 percent

Methodology Applied

Scientific EffectViscous damping: Viscous Damping

Data Source

PatentUS8986403B2Gasification system flow damping

Publication Date: 2015.03.24 AIR PROD & CHEM INC

AI summary

In one embodiment, a gasification system component, such as a quench unit or scrubber may retain of pool of a cooling fluid for cooling another fluid. The gasification system component includes a flow damping mechanism designed to dampen flow of the cooling fluid, the other fluid, or both, within the gasification system component. The flow damping mechanism may be disposed in an inner chamber formed between a dip tube and a draft tube or disposed in an outer chamber formed between the walls of the gasification system component and the draft tube. The flow damping mechanism also may be disposed between the inner chamber and the outer chamber.