Solid Fuel Burner Dispersion Apparatus for Uniform Feed Distribution
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Solution Overview
Problem
Conventional feed systems for flash smelting burners suffer from inefficiencies such as poor oxygen utilization, variable furnace metallurgy, and increased dust elutriation due to non-uniform distribution of particulate feed materials, leading to suboptimal combustion and reduced efficiency.
Innovation Solution
A dispersion apparatus with upstream and downstream guide means that introduce and condition particulate material flow to achieve a substantially uniform spatial distribution, utilizing spirals and elongate ribs to impart and reduce angular motion, ensuring particles travel aligned with the longitudinal axis for improved distribution and combustion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional feed systems with chutes and splitters are used to distribute particulate feed material, then feed delivery is achieved, but non-uniform distribution occurs causing poor combustion and reduced oxygen efficiency
Solution Approach 1:
The feed system is segmented into multiple feed chutes (typically 4) positioned at different locations around the burner circumference. Each chute delivers feed material through separate dispersion apparatus, dividing the single feed stream into multiple distributed streams that combine to form a more uniform overall distribution pattern at the burner outlet.
Solution Approach 2:
The dispersion apparatus introduces a rotational component to the particulate flow, transitioning from simple linear gravity flow to a two-dimensional rotational flow pattern. The guide means (spirals and elongate ribs) create circumferential motion that distributes particles radially outward, adding a rotational dimension to the feed distribution and eliminating corner accumulation.
2Ease of operation
If feed material flows through chutes and splitters, then feed is delivered to the burner, but feed gathers at corners and edges forming dense ropes that reduce combustion quality
Solution Approach 1:
Spiral guide elements are incorporated into the dispersion apparatus to impart rotational motion to the falling feed material. The curved spiral path replaces straight-line flow, creating a rotating feed pattern that naturally distributes material away from corner and edge concentrations toward a more uniform radial distribution at the outlet.
Solution Approach 2:
The dispersion apparatus with its guide means replicates the feed distribution pattern across multiple identical dispersion units positioned around the burner. Each unit creates a standardized flow pattern that, when combined with others, produces a uniformly distributed feed cloud without the irregular corner accumulation characteristic of single-chute systems.
3Productivity
If pneumatic conveying systems are used to eliminate pulsation, then capital investment and building modifications are required, but combustion efficiency is not sufficiently improved due to disruption by intermediate equipment
Solution Approach 1:
The invention extracts and eliminates the problematic intermediate equipment (feed chutes, splitters, diverter chutes) from the feed delivery system. By using a direct gravity-fed dispersion apparatus with guide means, the system removes the intermediate components that disrupt particle distribution, achieving both simplified system complexity and improved combustion efficiency simultaneously.
Solution Approach 2:
The dispersion apparatus uses the natural gravitational flow of feed material combined with passive guide means (spirals and ribs) to self-distribute the feed uniformly. No active pneumatic conveying equipment or complex control systems are required - the system serves itself through clever geometric design of the flow path, eliminating the need for capital-intensive pneumatic systems.
4Productivity
If feed is distributed through discrete inlet points around the burner circumference, then feed delivery is achieved, but particle distribution remains disrupted and combustion efficiency is insufficient
Solution Approach 1:
Multiple feed streams from separate chutes are merged within the dispersion apparatus where the guide means create a unified rotational flow pattern. The individual streams combine and intermix during their rotational descent, producing a homogeneous distributed feed cloud at the outlet that maximizes oxygen utilization and combustion efficiency.
Solution Approach 2:
The guide means (spirals and elongate ribs) utilize the kinetic energy and flow dynamics of the falling particulate material itself to create rotational motion, similar to how hydraulic or pneumatic systems use fluid flow dynamics. The gravitational potential energy of the falling feed is converted to rotational kinetic energy, distributing particles uniformly without requiring external pneumatic conveying equipment.
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 solution enhances the uniformity of particulate distribution at the burner outlet, leading to improved combustion efficiency and reduced oxygen remnants in off-gas, as demonstrated by increased spatial uniformity and reduced oxygen levels in industrial flash smelting facilities.
Implementation Method 1
the flow being at least in part, rotational about a longitudinal axis of the passage
Implementation Method 2
the downstream guide means configured to at least reduce the rotational motion so that the flow progresses toward the outlet region in a substantially uniform manner
Implementation Method 3
particulate material may flow from an inlet region toward an outlet region for dispersal therefrom
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3A~3C
AI summary
There is provided a dispersion apparatus for use with a solid fuel burner. The dispersion apparatus comprises a passage through which particulate material may flow toward an outlet region for dispersal therefrom, the flow being at least in part rotational about the longitudinal axis of the passage. The dispersion apparatus also comprises a downstream guide means arranged within the passage at or near the outlet region, the downstream guide means configured to at least reduce the rotational motion so that the flow progresses toward the outlet region in a substantially uniform manner in a direction aligned with a longitudinal axis of the passage.