Solids Distributor Common Wall Collection Chamber
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Solution Overview
Problem
Existing solids distributors for blast furnaces face challenges in achieving uniform distribution of ground fuel to lance lines, leading to uneven combustion and heating due to demixing of solids from conveying gas, which cannot be adequately compensated by individual line controls or distributors with separate chambers.
Innovation Solution
A solids distributor with a collection chamber surrounded by a common wall, where lance lines are connected directly, and a pressure vessel above the chamber with a bunker and gas space, featuring an annular gap for tangential flow and a control device to regulate pressure and flow, reducing segregation and pulsations, and optionally including individual line controls for further refinement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If individual volume controls are installed on each lance line to equalize supply, then distribution uniformity is improved, but device complexity increases significantly
Solution Approach 1:
The patent merges all individual line controls into a single centralized control unit that regulates the common supply line before the fuel distributor. This single control mechanism replaces what would otherwise require multiple individual controls on each lance line, achieving distribution uniformity while maintaining simple device architecture.
Solution Approach 2:
The patent introduces a common supply line as an intermediary between the fuel source and the individual lance lines. This common supply line acts as a mediator that can be controlled centrally to ensure uniform distribution to all lances, eliminating the need for complex individual controls on each line.
2Adaptability or versatility
If ground fuel is conveyed over a long feed line to the distributor, then operational flexibility is improved, but distribution uniformity deteriorates due to demixing of solids from conveying gas
Solution Approach 1:
The patent performs preliminary mixing of the ground fuel with carrier gas in a common supply line before distribution to individual lances. This preliminary action ensures that the fuel-gas mixture is homogeneous before reaching the distributor, preventing demixing even after long conveyance distances and maintaining distribution uniformity.
Solution Approach 2:
The patent uses pneumatic conveying through a common supply line to transport the ground fuel mixed with carrier gas. This pneumatic system maintains the fuel-gas mixture in a homogeneous state during transport, preventing demixing and ensuring uniform distribution to all lance lines regardless of feed line length.
3Manufacturing precision
If separate sub-chambers are used for each lance line in the distributor, then distribution control is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the distribution function for all lance lines into a single common chamber instead of using separate sub-chambers for each line. The common chamber distributes the fuel-gas mixture to multiple lances simultaneously, achieving distribution control while maintaining simple device structure and lower cost.
Solution Approach 2:
The common chamber serves multiple functions: it acts as a mixing chamber for the fuel-gas mixture, a distribution chamber for dividing the mixture to multiple lances, and a pressure equalization chamber. This multi-functionality eliminates the need for separate sub-chambers while maintaining effective distribution control.
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 solution ensures even distribution of solids to lance lines, reducing the need for complex individual controls and allowing for flexible operation over longer feed distances, achieving uniform heating and efficient fuel use with minimal effort.
Implementation Method 1
The lower part of which is designed as a bunker and has an outlet connected to the supply connection
Implementation Method 2
the outside of which is spaced apart from the peripheral common wall and thus forms an annular gap. Preferably, the displacement body tapers upwards, ie in the direction of the pressure vessel. Its outer casing thus forms an inclined surface in relation to the solids entering the collection chamber
Data Source
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AI summary
Solids distributor for injection plants, in particular for blast furnaces, comprising a chamber and a plurality of lance lines (90) which lead off, wherein the chamber has a supply connection (77) for a ground solid which is to be distributed. According to the invention, the chamber is a collecting chamber (72) enclosed by a common wall (73), with the result that the lance lines (90) connected to it are interconnected within the collecting chamber (72), wherein a pressure container (4) is arranged geodetically above the collecting chamber (72), the lower part of which container is designed as a bunker (42) and has an outlet (47) connected to the supply connection (77), and the upper part (41) of which container is designed as a gas space. The design of the chamber as a common collecting chamber (72) and the direct connection of the lance lines (90) to the common wall (73) provide a significantly better raw distribution, which means that the individual lance controls conventionally used are largely superfluous. The invention extends to a corresponding distributor head which is particularly suitable for retrofitting existing plants.