Coke Oven Secondary Air Proportioning System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing coke oven chamber systems face challenges in controlling the quantity of secondary combustion air, leading to uneven heating of the coke cake, increased pollutant formation, and reduced efficiency due to unregulated air supply and temperature differences between primary and secondary heating spaces.
Innovation Solution
A device with parallelepiped attachments linked to a thrust bar, driven by a positioning motor, controls the secondary air apertures to regulate air flow based on temperature ratios between the vault and sole, ensuring complete combustion and optimal oxygen stoichiometry, thereby improving temperature distribution and reducing pollutant formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If secondary air is supplied in large quantities to ensure complete combustion, then combustion completeness is improved, but temperature distribution uniformity deteriorates due to excessive cooling of the secondary heating space
Solution Approach 1:
The patent applies dynamics by making the air supply system adjustable through positioning motors that control the opening degree of air supply apertures. This allows the system to adapt air quantity dynamically based on combustion stage requirements, rather than maintaining a fixed large opening that would cause excessive cooling.
Solution Approach 2:
The patent changes the parameter of air supply quantity by controlling the opening degree of secondary air supply apertures. The positioning motors adjust the aperture openings to optimize the balance between combustion completeness and temperature distribution, preventing excessive cooling while ensuring sufficient oxygen for combustion.
2Productivity
If secondary air supply apertures remain open to allow air flow, then combustion efficiency is improved, but temperature control precision deteriorates due to unregulated cooling effects
Solution Approach 1:
The patent implements feedback control by using temperature sensors to detect the temperature of the secondary heating space and adjusting the aperture opening degree accordingly. The control unit receives temperature signals and regulates air supply to maintain optimal temperature, creating a closed-loop system that balances combustion efficiency with temperature precision.
Solution Approach 2:
The system transitions from static aperture openings to dynamic adjustment mechanisms. Positioning motors continuously modify the opening degree of air supply apertures based on combustion requirements and temperature feedback, enabling precise temperature control while maintaining efficient combustion through optimized air supply.
3Device complexity
If fixed aperture openings are used for secondary air supply, then device complexity is reduced, but adaptability to different combustion stages deteriorates
Solution Approach 1:
The patent applies universality by designing a multi-functional air supply system that can serve different combustion stages (primary combustion, secondary combustion, and cooling phases) through a single adjustable mechanism. The positioning motors and controllable apertures enable the system to adapt its function based on the combustion stage, rather than requiring separate fixed systems for each phase.
4Ease of operation
If unregulated air supply is used, then ease of operation is improved, but pollutant formation increases due to incomplete combustion control
Solution Approach 1:
The patent applies self-service by enabling the system to automatically regulate its own air supply without manual intervention. Temperature sensors continuously monitor the secondary heating space temperature, and the control unit automatically adjusts aperture openings through positioning motors to maintain optimal combustion conditions, preventing pollutant formation while eliminating the need for manual regulation.
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 enables uniform heating of the coke cake, enhances coke quality, and reduces pollutant emissions by precisely controlling the secondary air supply, ensuring complete combustion and optimal oxygen utilization.
Implementation Method 1
a positioning motor (9) is provided which drives the thrust bar (5)
Implementation Method 2
secondary combustion air enters through apertures in the pusher side or coke side frontal coke oven chamber wall beneath the coke oven chamber door into channels which lie beneath the coking chamber and where partly burnt coking gas is mixed with secondary combustion air and burnt completely
Implementation Method 3
the heat of combustion evolving there heats the coke cake from below. Thereby the heat distribution of the coke cake is substantially homogenized from all sides
Data Source
AI summary
A device for proportioning of secondary combustion air into the secondary air soles of coke oven chamber ovens is shown. The device is formed by a slide gate or a parallelepiped device or by plates moved by means of a thrust bar, the thrust bar being moved longitudinally in parallel to the coke oven chamber wall so that the plates move away from the secondary air apertures and open or close these. The thrust bar is moved by means of a positioning motor, with the power transmission being effected hydraulically or pneumatically. Via suitable measuring parameters, it is thus possible to optimize secondary heating so that heating is provided evenly from all sides, thus achieving an improvement in coke quality.