Rotating Hopper Limestone Distribution in Vertical Kilns
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Solution Overview
Problem
Existing limestone loading systems for vertical lime kilns fail to ensure uniform distribution and prevent segregation of limestone pieces, especially in large furnaces, leading to suboptimal product quality and increased stress on materials, which complicates installation and maintenance.
Innovation Solution
A limestone loading system that rotates on a vertical axis with parametric control, using a double-plate discharge valve and a rack-and-pinion translation system, allowing precise positioning and uniform distribution of limestone pieces across the furnace volume, with the ability to move between multiple vats and control segregation through adjustable discharge angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static loading systems with vertical elevators and slides are used, then the system is simple from the point of view of plant engineering, but segregation of limestone pieces according to dimension occurs
Solution Approach 1:
The patent transforms the static loading system into a dynamic one by introducing a movable hopper that can rotate around a vertical axis and translate along rails. This dynamic configuration allows the hopper to change its discharge angle and position during operation, creating varied material flow paths that prevent segregation of limestone pieces by size while maintaining system simplicity.
2Stability of the object's composition
If movable and dynamic systems with rotating hoppers are used, then segregation of pieces is avoided, but the system becomes more complex from the construction point of view
Solution Approach 1:
The patent segments the loading system into modular components: a hopper divided into independent discharge zones, a separate rotation mechanism for angular positioning, and independent translation rails. This segmentation allows each component to perform its function simply while the combination achieves homogeneous material distribution, reducing overall construction complexity.
3Device complexity
If limestone is conveyed through vertical elevators and slides, then the conveying process is simple, but stress on stones increases causing crumbling and fine material production
Solution Approach 1:
The patent applies preliminary action by coating the hopper's discharge surfaces with impact-resistant materials before the limestone is discharged. This pre-prepared protective surface reduces impact stress on the stones during discharge, minimizing crumbling and fine material production while keeping the conveying process simple.
4Ease of manufacture
If a single loading point is used, then the installation is simpler, but uniform distribution of limestone across the furnace volume is difficult to achieve
Solution Approach 1:
The patent introduces dynamic capabilities to a single loading point by enabling the hopper to rotate around a vertical axis and translate along rails. This allows the single discharge point to cover multiple areas of the furnace volume by changing its angular and positional parameters, achieving uniform distribution without requiring multiple loading points or complex installation.
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 uniform limestone distribution, reduces material stress, simplifies installation and maintenance, and enhances product quality by controlling the load and size of limestone pieces, while minimizing the formation of fines and noise.
Implementation Method 1
through a rack-and-pinion translation system
Implementation Method 2
valve (11) with double plate (11 ', 11 '')
Implementation Method 3
the inside of the hopper and the valve is coated with high-strength rubber panels, which reduce the impact force of the incoming material
Data Source
Figure 1
Figure 2
Figure 3
AI summary
System (100) for conveying and distributing limestone in pieces for use in vertical lime kilns having at least one vat (20, 20'), comprising a hopper (1) for receiving limestone in pieces, a support structure (3) provided with wheels for linear displacement on a rail (4), to which the hopper (1) is fixed by means of a thrust bearing (5), two geared motors (6, 7) allowing the movement of the hopper (1), a valve (11) provided with a pair of plates (11', 11'') connected to a lower portion of the hopper (1), a pair of sealing bellows (13), positioned both at an inlet and at an outlet of the hopper (1). The first geared motor (6) is configured to allow rotation of the hopper (1) around one of its vertical axis through a toothed coupling (8) and each plate (11', 11'') of the pair of plates assumes an opening angle (α) between 0° and 120°, in order to guarantee a homogeneous distribution of limestone in pieces, within the volume of at least one vat (20, 20') of the vertical lime kiln.