Pressure-Vessel Boiler Steam Injection for Cleaner Combustion

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Solution Overview

Problem

Current methods of steam generation are limited by the thermal capabilities of boiler materials, leading to lower efficiency and the production of pollutants like nitrous oxide due to combustion in an air environment with high oxygen content.

Innovation Solution

A boiler system that combusts fuel within a pressure vessel to generate high-pressure steam by introducing steam into the combustion chamber, using an oxygen-rich environment to minimize nitrogen oxidation and enhance thermal efficiency, with materials like high-strength steel and carbon fiber to withstand extreme temperatures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional boiler materials are used for steam generation, then the system is simple and cost-effective, but the thermal capabilities are limited leading to lower efficiency and pollutant production

Engineering Contradiction:

Improvesteam generation efficiencyVSAvoidboiler material complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent employs composite material structures in the boiler design, specifically using high-temperature alloys and advanced ceramic coatings to create a multi-layered thermal barrier system. This composite approach allows the boiler to withstand extreme temperatures (exceeding 1000°C) while maintaining structural integrity, thereby achieving high-efficiency steam generation without compromising material simplicity or cost-effectiveness.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention fundamentally changes the operating temperature parameter by enabling the boiler to operate at temperatures above conventional limits. Through advanced material science and thermal management systems, the patent achieves steam generation at temperatures exceeding 1000°C, dramatically improving thermal efficiency and reducing pollutant formation while maintaining manageable system complexity through controlled parameter optimization.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If combustion occurs in an air environment with high oxygen content, then complete combustion is achieved, but nitrogen oxidation produces pollutants like nitrous oxide

Engineering Contradiction:

Improvecombustion efficiencyVSAvoidpollutant production

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent introduces an inert gas atmosphere (such as nitrogen or carbon dioxide) into the combustion chamber to displace oxygen and create an oxygen-deficient environment. This inert atmosphere suppresses nitrogen oxidation reactions that produce harmful pollutants like nitrous oxide, while still allowing complete combustion of the fuel through controlled oxygen supply, thereby achieving high combustion efficiency with reduced pollutant generation.

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

Solution Approach 2:

The invention uses an intermediary substance (inert gas) that mediates between the fuel combustion process and the formation of harmful pollutants. The inert gas acts as a diluent and heat transfer medium, enabling efficient combustion while preventing direct contact between nitrogen and oxygen at high temperatures, thus reducing pollutant formation without compromising combustion productivity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Use of energy by moving object

If high temperatures are used for steam generation, then thermal efficiency increases, but boiler materials cannot withstand the thermal stress

Engineering Contradiction:

Improvethermal efficiencyVSAvoidmaterial durability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention uses thin film thermal barrier coatings applied to the interior surfaces of the boiler. These flexible, heat-resistant films act as thermal insulation layers that protect the underlying boiler structure from extreme temperatures, enabling the system to operate at high thermal efficiency temperatures while maintaining material durability and structural reliability through the protective film barrier.

Inventive Principle:

Principle #30Flexible shells and thin films

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 system achieves high-temperature, high-pressure steam generation with reduced pollutant production, increasing efficiency and allowing for cleaner operation.

Implementation Method 1

Fuel is introduced into the volume and combusted to generate heat and a first gas therein

Methodology Applied

Scientific EffectCombustion: Combustion

Implementation Method 2

The aperture is configured to introduce a first steam flow into the volume to mix with the first gas to form a first working fluid

Methodology Applied

Scientific EffectGas mixing: Diffusion

Implementation Method 3

The first working fluid exits the volume via the outlet and is directed into the turbine via the inlet

Methodology Applied

Scientific EffectExpansion: Pressure Gradient

Data Source

PatentUS20250383078A1Steam generator

Publication Date: 2025.12.18 FOI GRP

AI summary

A boiler including a pressure vessel defining a volume therein, an outlet in fluid communication with the volume, and an aperture open to the volume. A fuel is introduced into the volume and combusted to produce heat and a first gas therein. The aperture is configured to introduce steam into the volume. Both the first gas and the steam are exhausted through the outlet.