Plasma-Assisted Coal Burner for Stable Decomposing Furnace Ignition
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Solution Overview
Problem
The stability of pulverized coal burning in cement production decomposing furnaces is affected by fluctuations in the temperature of flue gas from the kiln tail and heat from raw materials, leading to issues like poor burning and flameout, especially during starting or low load conditions.
Innovation Solution
A pulverized coal and warm nuclear fusion combined glowing flame burner system that uses a metal electrode and warm nuclear fusion excitation assembly to create a plasma field, ensuring stable burning by synergistically releasing nuclear and chemical energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional flue gas temperature and raw material heat are used to maintain burning, then the decomposing furnace can operate with existing equipment, but the burning stability deteriorates due to temperature fluctuations
Solution Approach 1:
A preheating device is introduced as an intermediary component between the flue gas source and the decomposing furnace. This device preheats the air or gas before it enters the furnace, stabilizing the combustion temperature and reducing the direct impact of flue gas temperature fluctuations on burning stability.
Solution Approach 2:
The invention changes the temperature parameter of the combustion air by introducing a preheating step. By controlling the preheating temperature independently, the system can maintain stable burning conditions even when flue gas temperature varies, thus improving reliability without requiring complete system redesign.
2Temperature
If high flue gas temperature (800-1000°C) is used for spontaneous ignition, then pulverized coal can ignite easily, but the energy consumption increases and coal ratio rises
Solution Approach 1:
The preheating device performs preliminary heating of the combustion air before it enters the decomposing furnace. This preliminary action reduces the temperature gap needed for spontaneous ignition, allowing coal to ignite at lower temperatures and thus reducing the energy required from flue gas and overall energy consumption.
Solution Approach 2:
By changing the temperature parameter of the incoming air through preheating, the system reduces the required ignition temperature. This parameter change allows combustion to occur at lower temperatures, directly reducing energy consumption while maintaining effective ignition.
3Adaptability or versatility
If flue gas temperature fluctuation is used for operation, then the system can adapt to varying loads, but the burning condition deteriorates during starting and low load
Solution Approach 1:
The preheating device acts as a buffer and mediator that decouples the relationship between flue gas temperature and combustion temperature. During starting and low load conditions, it maintains sufficient combustion temperature by preheating air, ensuring reliable burning while allowing the system to adapt to varying loads.
Solution Approach 2:
The preheating device provides beforehand cushioning by storing and delivering thermal energy to the combustion air. During periods of low load or starting conditions, this preheated air cushions against temperature drops, maintaining stable burning conditions and preventing flameout.
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
Enhances energy utilization efficiency and reduces coal consumption by actively maintaining a stable burning condition through plasma field generation, avoiding poor burning and flameout, and optimizing energy distribution.
Implementation Method 1
uses a metal electrode and warm nuclear fusion excitation assembly to create a plasma field
Implementation Method 2
metal electrode and warm nuclear fusion excitation assembly to create a plasma field
Implementation Method 3
A conveying channel is arranged in the metal electrode, and one end of the conveying channel penetrates through an outer side wall of a first end of the metal electrode to form an air outlet
Implementation Method 4
pulverized coal burning system... pulverized coal is burnt in glowing flames
Data Source
AI summary
A pulverized coal and warm nuclear fusion combined glowing flame burner is provided, and relates to the field of cement production. The burner includes: a metal elbow; and a warm nuclear fusion excitation assembly, which includes a metal outer shell, a metal electrode, an insulation connector, and an electrode tip. The metal outer shell located inside the metal elbow is partially provided with an opening. The metal electrode is arranged inside the metal outer shell and is connected to the metal outer shell through the insulation connector. The metal outer shell is provided with a conveying pipe communicated to an inner cavity of the metal outer shell. A conveying channel is arranged in the metal electrode, and one end of the conveying channel penetrates through an outer side wall of a first end of the metal electrode to form an air outlet.