Spring-Based Expansion Pressure Detection for Coking Coal
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Solution Overview
Problem
Existing methods for measuring expansion pressure and displacement of coking coal during the coking process are inefficient, leading to high coal consumption, measurement errors due to uneven heating, and inadequate simulation of the influence of gravity on coke quality and oven integrity.
Innovation Solution
A device utilizing a spring-based detection mechanism with a pyrolysis reactor, porous pressing plates, metal filter plates, and a carbonization furnace to accurately measure expansion pressure and displacement, minimizing coal consumption and simulating the effect of gravity on coal samples at different heights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a movable wall coke oven is used to measure expansion pressure, then measurement capability is achieved, but coal consumption increases to several hundred kilograms
Solution Approach 1:
The invention divides the coal bed into multiple layers (first coal bed, second coal bed, third coal bed) with different heights, allowing measurement of expansion pressure at different depths. This segmentation enables accurate measurement of expansion pressure characteristics without requiring large quantities of coal, as each layer can be measured independently.
Solution Approach 2:
The invention creates a simplified experimental model that copies the essential characteristics of the actual coking process. By using a scaled-down setup with multiple coal beds of different heights, the system reproduces the gravity effect and expansion pressure generation without requiring the full-scale coal consumption of traditional movable wall ovens.
2Ease of manufacture
If bottom heating mode is used, then heating is simplified, but uneven heating occurs due to poor thermal conductivity of coal
Solution Approach 1:
The heating system is segmented into multiple independent heating devices positioned at different locations (bottom, side walls, top) of the pyrolysis reactor. This allows each heating zone to be controlled separately, ensuring uniform temperature distribution throughout the coal beds while maintaining experimental simplicity.
Solution Approach 2:
The invention combines multiple heating methods (bottom heating, side heating, top heating) into a single integrated system. By merging these different heating approaches, the system achieves comprehensive and uniform heating of the coal samples, overcoming the limitation of poor coal thermal conductivity while keeping the design straightforward.
3Adaptability or versatility
If dual-furnace structure with close proximity is used, then horizontal unilateral heating is achieved, but temperature field interaction between furnaces occurs
Solution Approach 1:
The heating system is divided into spatially separated heating zones positioned at different locations (bottom, sides, top) around a single pyrolysis reactor. This segmentation eliminates temperature field interaction between furnaces while maintaining the flexibility of horizontal unilateral heating modes, as each heating zone can be independently controlled.
4Measurement precision
If spring detection mechanism is used, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The spring serves as both the detection element and the measurement indicator. As the coal bed expands and compresses the spring during pyrolysis, the spring's deformation automatically provides the measurement data for expansion pressure and displacement. This self-service approach improves measurement accuracy without requiring complex external measurement systems.
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 device achieves high accuracy and stability in measuring expansion pressure and displacement with reduced coal consumption, enabling optimized coal blending and extended coke oven life by accurately simulating the influence of gravity on coal samples.
Implementation Method 1
a spring; wherein one end of the spring is connected to the mounting baffle, and the other end of the spring is connected to the lightweight connecting rod
Implementation Method 2
Device for determining expansion pressure and expansion displacement generated by coking coal based on self-regulation of spring
Implementation Method 3
When coal is subjected to thermal decomposition in a carbonization chamber with a certain volume, the coal will produces a certain pressure on the oven wall
Implementation Method 4
two porous pressing plates; the two porous pressing plates consist of a first porous pressing plate and a second porous pressing plate; the first porous pressing plate is provided on an upper side of the coal sample; the second porous pressing plate is provided on a lower side of the coal sample
Implementation Method 5
two metal filter plates; the two metal filter plates consist of a first metal filter plate and a second metal filter plate; the first metal filter plate is provided between the coal sample and the first porous pressing plate
Data Source
AI summary
A device for determining an expansion pressure and an expansion displacement generated by coking coal based on self-regulation of a spring includes a pyrolysis reactor, which is provided in a high temperature carbonization furnace. Two porous pressing plates are provided at both sides of a coal sample, and two metal filter plates are provided at both sides of the sample. Upper and lower openings of the reactor are sealed respectively with a connecting flange. The pressing plate above the sample is connected to a mounting baffle of a detection mechanism through a lightweight connecting rod and a spring. The detection mechanism is provided with a displacement sensor and a pressure sensor. This application further provides a detection method using the above device.