Staggered Opposite Nozzle Arrangement for Ash Removal
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Solution Overview
Problem
Existing nozzle arrangements in coal gasification processes face issues with ash accumulation, which can lead to fouling when disturbed gas flow allows ash and liquid water to contact vessel walls, and existing soot blowers disrupt local gas flow, causing incomplete evaporation and further fouling.
Innovation Solution
A nozzle arrangement featuring pairs of oppositely oriented nozzles positioned in a staggered configuration along parallel conduits, with outflow openings directed towards each other, minimizing gas flow disruption while effectively removing solids from both conduit surfaces and preventing ash and liquid water deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a soot blower is used to remove ash from heat recovery devices, then ash removal is improved, but the local gas flow is disturbed causing ash and liquid water to contact vessel walls resulting in fouling
Solution Approach 1:
The invention divides the single soot blower function into multiple nozzles positioned at different locations along the conduit. Each nozzle removes ash from its local area while the distributed arrangement ensures that gas flow disturbances are localized and do not propagate to cause fouling on vessel walls.
Solution Approach 2:
The nozzles are positioned at specific locations along the conduit where ash accumulation is most likely to occur. Each nozzle provides localized ash removal capability, concentrating the cleaning action where needed while minimizing overall gas flow disturbance.
2Reliability
If nozzles are used to blow gas along heat exchange surfaces to avoid solids accumulation, then solids removal from surfaces is improved, but solids may still accumulate on the nozzles themselves
Solution Approach 1:
The invention combines multiple nozzles in a parallel arrangement where the gas flow from each nozzle interacts with the surfaces of adjacent nozzles. This merging of flow paths ensures that solids removed from one nozzle surface are carried away by the combined gas flow, preventing re-accumulation on other nozzles.
Solution Approach 2:
The gas flow generated by the nozzles acts as an intermediary that carries solids away from the conduit surfaces and prevents their deposition on the nozzles themselves. The coordinated action of multiple nozzles creates a protective gas flow field that prevents direct contact between solids and nozzle surfaces.
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
This configuration maintains a stable gas flow, ensuring efficient removal of solids from both conduit surfaces and reducing fouling, allowing for continuous operation by minimizing the accumulation of ash and liquid water, thus preventing fouling and ensuring prolonged operation.
Implementation Method 1
each nozzle having an outflow opening for gas directed, along the surface of the conduit
Implementation Method 2
pairs of oppositely oriented nozzles suitable to remove solids from its surface
Data Source
AI summary
The invention is directed to an arrangement of two conduits, wherein the conduits are positioned parallel with respect to each other and wherein each conduit is provided with means suitable to remove solids from its surface and positioned along the length of one of the two sides of the conduit, wherein the means are one or more pairs of oppositely oriented nozzles, each nozzle having an outflow opening for gas directed, along the surface of the conduit, towards the outflow opening of the other nozzle of said pair, wherein the pairs of oppositely oriented nozzles of one conduit are arranged in a staggered configuration relative to the pairs of oppositely oriented nozzles of the other conduit.