Fuel Supply Fire Protection via Non-Flammable Liquid Injection
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Solution Overview
Problem
Existing solid fuel combustion or gasification plants face significant risks of fires due to dust and combustible gas leakage, particularly in the fuel supply area, where mechanical fire protection systems often fail due to obstruction, high maintenance needs, and incompatibility with irregular fuels.
Innovation Solution
A method involving the injection of a non-flammable liquid into the fuel supply system to form a fuel plug and create an empty space, using endless screws and sensors for fire detection, with an automaton controlling the injection and plug formation to prevent fire spread, and a redundant fire-fighting system for extinguishing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical fire protection systems (flaps, guillotines, rotary systems) are installed in the fuel supply area, then fire spread is prevented, but the systems are prone to obstruction, require high maintenance, and are incompatible with irregular fuels
Solution Approach 1:
The patent replaces mechanical fire protection systems (flaps, guillotines, rotary valves) with a fluid-based fire suppression system that injects water or inert gas directly into the fuel supply area. This eliminates moving parts that can be obstructed by irregular fuels, while maintaining reliable fire protection through chemical/physical suppression mechanisms that are not affected by fuel irregularity.
Solution Approach 2:
The patent employs hydraulic injection of water through nozzles positioned in the fuel supply area to suppress fires. This fluid-based approach avoids mechanical obstruction issues while providing effective fire suppression through water's cooling and smothering properties, eliminating the maintenance problems associated with mechanical moving parts.
2Object-affected harmful factors
If mechanical fire protection systems are installed to block fire spread, then fire risks are reduced, but the systems are expensive and complex to install and maintain
Solution Approach 1:
The patent replaces complex mechanical fire protection systems with a simpler fluid injection system. Instead of installing and maintaining mechanical barriers like flaps and guillotines, the system uses water injection nozzles connected to a straightforward hydraulic supply, dramatically reducing system complexity while maintaining fire protection effectiveness.
Solution Approach 2:
The patent extracts the essential fire suppression function from complex mechanical systems and implements it through a simplified fluid injection approach. By taking out only the necessary fire suppression capability and implementing it through water injection rather than mechanical barriers, the system achieves the same protective function with minimal complexity.
3Reliability
If the fuel supply system is cleared continuously to prevent damper obstruction, then mechanical systems operate reliably, but biomass is wasted and the system requires constant intervention
Solution Approach 1:
The patent replaces mechanical dampers that require clearing with a fluid-based fire suppression system. This eliminates the need for continuous biomass removal to prevent obstruction, as the water injection system has no moving parts that can be blocked by irregular fuels, thereby preventing biomass waste while maintaining reliability.
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
Effectively prevents and combats fire risks by isolating the fuel from the heat source, reducing the risk of fire outbreaks, and maintaining plant operation with a robust, inexpensive, and low-maintenance solution that is suitable for irregular fuels.
Implementation Method 1
a non-flammable liquid is injected into the fuel contained in the fuel supply system
Implementation Method 2
using endless screws and sensors for fire detection
Data Source
Figure 1~2B
Figure 3
Figure 4
AI summary
The invention relates to a method for fire-resistant protection of a solid fuel combustion or gasification plant (2) (3) comprising a combustion chamber (1) for the solid fuel (3), said chamber (1) being supplied with solid fuel (3) by a fuel supply system (4). The invention is characterized in that it comprises the following steps: injecting a non-flammable liquid into the fuel (3) contained in the fuel supply system (4); forming a plug (7) of fuel (3) in the fuel supply system (4); and creating a fuel-free space (8) in the fuel supply system.