Ammonia Oxidation Burner Basket Retaining Device

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Solution Overview

Problem

In ammonia oxidation burners, the separation of the bottom plate and side wall by a gap leads to mechanical stresses and a risk of the retaining gauze detaching, causing particles to fall out of the burner basket due to movements between these components.

Innovation Solution

A burner basket design with a gas-permeable bottom plate and side wall spaced by a gap, featuring fastening elements on the bottom plate to secure a retaining device, such as a gas-permeable gauze, which prevents detachment and maintains coverage over the gap and openings, even during plate movements, using pins or barbs for fixation and optionally a sealing device to minimize gap exposure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stress or pressure

If the bottom plate and side wall are separated by a gap to reduce mechanical stresses, then the mechanical stress in the burner basket material is reduced, but the retaining gauze may detach due to movements between components causing particles to fall out

Engineering Contradiction:

Improvemechanical stressVSAvoidretaining gauze attachment

Core Design Contradiction:

Stress or pressureVSReliability

Solution Approach 1:

The burner basket is divided into separate components (bottom plate and side wall) that can move independently, reducing mechanical stress. The retaining gauze is segmented with fastening elements distributed at multiple locations to maintain attachment despite relative movements between segments.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Fastening elements act as intermediary components between the retaining gauze and bottom plate, providing a mechanical connection that accommodates movements while preventing gauze detachment. These fastening elements serve as mediators that resolve the conflict between component mobility and gauze security.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If the bottom plate is made gas-permeable with openings to allow ammonia flow, then gas permeability is improved, but particles can fall through the openings

Engineering Contradiction:

Improvegas flow through bottom plateVSAvoidparticle loss

Core Design Contradiction:

ProductivityVSLoss of substance

Solution Approach 1:

A retaining device in the form of a gauze (flexible mesh structure) is introduced to cover the openings in the bottom plate. This thin film structure allows gas to pass through while physically blocking particles, resolving the contradiction between gas permeability and particle retention.

Inventive Principle:

Principle #30Flexible shells and thin films

3Productivity

If the retaining device is made gas-permeable to allow ammonia flow, then gas flow is maintained, but the device provides less structural support to prevent detachment

Engineering Contradiction:

Improveammonia flow through retaining deviceVSAvoidretaining device attachment strength

Core Design Contradiction:

ProductivityVSStrength

Solution Approach 1:

The retaining device is constructed as a gas-permeable gauze with porous structure that allows ammonia flow. Despite the porous nature reducing overall strength, localized fastening elements are introduced to provide concentrated structural support at critical attachment points, maintaining both gas permeability and attachment strength.

Inventive Principle:

Principle #31Porous materials

Data Source

PatentUS10308510B2Burner basket for an ammonia oxidation burner

Publication Date: 2019.06.04 THYSSENKRUPP UHDE GMBH

AI summary

A burner basket for an ammonia oxidation burner includes a gas-permeable bottom plate, with a side wall that is spaced apart from the bottom plate by a gap, and a retaining device covering the bottom plate and the gap for retaining particles of a bulk material that can be arranged in the burner basket. A fastening element is arranged on the bottom plate, by which the retaining device is fixed in place. An ammonia oxidation burner comprises a burner for oxidizing ammonia and a burner basket.