Refractory Deflecting Bricks for Hot-Blast Stove Support
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Solution Overview
Problem
The existing support structures for checker bricks in hot-blast stoves, made of steel, are limited by temperature and oxygen concentration conditions, leading to reduced heat storage capacity, inefficient use of through-holes, and increased operational costs due to the need for supplementary oxygen and costly fuels.
Innovation Solution
A support structure using refractory material deflecting blocks that connect through-holes in checker bricks to a deflecting passage, allowing for improved airflow and heat transfer, and are designed to withstand higher temperatures and oxygen concentrations, eliminating the limitations of traditional steel receiving metals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If steel support structures are used, then the structure can support checker bricks, but the structure is limited by temperature and oxygen concentration conditions
Solution Approach 1:
The patent changes the material parameter from steel to refractory material, which fundamentally alters the temperature and oxygen resistance properties. Refractory materials can withstand temperatures above 1000°C and high oxygen concentrations without oxidizing or deforming, thereby resolving the contradiction between temperature resistance and structural reliability.
Solution Approach 2:
The support structure uses composite refractory material construction, combining multiple refractory components (deflecting blocks, support blocks, foundation bricks) to create a unified structure that maintains integrity under extreme temperature and oxygen conditions while supporting the checker bricks.
2Device complexity
If traditional steel receiving metals are used, then the structure is simple, but the heat storage capacity is reduced
Solution Approach 1:
The support structure is segmented into distinct functional components: foundation bricks at the bottom, support blocks for elevation, and deflecting blocks with passages for airflow. This segmentation allows each component to optimize its function while collectively providing high heat storage capacity through increased checker brick contact area and improved gas flow distribution.
Solution Approach 2:
The deflecting blocks introduce a horizontal dimension to gas flow by creating passages that redirect hot blast laterally before it enters the checker bricks. This dimensional change increases the effective heat storage volume and improves thermal efficiency without significantly increasing structural complexity.
3Ease of manufacture
If steel support structures are used, then the structure can be manufactured easily, but the operational costs increase due to need for supplementary oxygen and costly fuels
Solution Approach 1:
The refractory support structure itself serves the dual function of supporting the checker bricks and managing the hot blast airflow. The deflecting passages in the support blocks automatically redirect gas flow without requiring external mechanical devices, reducing operational costs by eliminating the need for supplementary oxygen injection systems and expensive fuel additives.
4Device complexity
If through-holes in checker bricks are not efficiently utilized, then the structure is simple, but airflow efficiency is reduced
Solution Approach 1:
The deflecting blocks act as intermediary elements between the hot blast source and the checker bricks. Their internal passages serve as intermediate channels that redirect and distribute the hot blast to multiple through-holes in the checker bricks, ensuring efficient utilization of all available flow paths and maximizing airflow efficiency.
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 refractory material support structure enhances heat storage capacity, improves airflow efficiency through all through-holes, and reduces operational costs by maintaining strength under high temperatures and allowing higher oxygen concentrations, thus increasing the temperature and efficiency of the hot blast supplied to the blast furnace.
Implementation Method 1
a deflecting passage connected to through-holes of the checker bricks and being opened at an opening section on a side surface of the brick body
Implementation Method 2
air from outside is introduced into the ventilation space via the duct. From the ventilation space, the air is distributed to the through-holes in the checker bricks. The air is heated during passing through the checker bricks and transmitted to the blast furnace as the hot blast.
Data Source
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AI summary
A support structure (32) for supporting checker bricks (5) in a hot-blast stove includes deflecting bricks (7) supporting the checker bricks (5) and support bricks (6) supporting the deflecting bricks (7). The deflecting brick (7) includes a brick body (70) and a deflecting passage (75) connected to through-holes (54) in the checker bricks (5) and opened at an opening section on a side surface of the brick body (70). The deflecting bricks (7) are arranged along an imaginary deflecting plane that partitions the inside of the hot-blast stove into an upper side and a lower side. A horizontal passages (35) connected to the deflecting passages (75) are defined between the deflecting bricks (7) and the support bricks (6).