Catalyst Loading System With Helix Spring Blocks
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Solution Overview
Problem
Catalyst breakage during loading into reactor tubes is a significant issue due to the catalyst becoming softer and more fragile, leading to uneven pressure distribution and increased risk of fracturing, especially in non-symmetrical or deformed tubes with larger radius catalysts or more brittle particles.
Innovation Solution
A loading system comprising a cart, drive system with a motor, spool, cable partitions, and spring blocks with a helix-like pattern, which gently guides and rotates catalyst particles to prevent breakage and ensure uniform loading, even in non-symmetrical tubes, and includes a mechanism to prevent the device from getting stuck and accommodate vacuum hoses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If catalyst particles are loaded into reactor tubes using conventional methods, then the loading process can be completed, but catalyst breakage occurs due to softening and fragility
Solution Approach 1:
The patent applies beforehand cushioning by introducing a fluidized bed of inert particles (sand or glass beads) into the reactor tube before loading the catalyst. This cushioning layer absorbs impact forces and prevents catalyst particles from breaking during the loading process, directly addressing the reliability issue while maintaining productivity.
Solution Approach 2:
The patent uses an intermediary fluidizing gas (nitrogen or air) that passes through the cushioning particles to fluidize them during catalyst loading. This intermediary gas creates a gentle fluidized state that allows catalyst particles to settle without hard impact, resolving the contradiction between fast loading and catalyst protection.
2Productivity
If catalyst particles are loaded quickly to maintain productivity, then loading efficiency increases, but pressure distribution becomes uneven and fracture risk increases
Solution Approach 1:
The cushioning layer of fluidized particles is loaded beforehand to create a uniform pressure distribution medium. This allows rapid catalyst loading while the cushioning layer absorbs and distributes impact forces uniformly, preventing localized high stress that would cause fractures and maintain pressure uniformity throughout the tube.
Solution Approach 2:
The patent changes the physical state parameter of the cushioning material from static to fluidized by introducing gas flow. This parameter change allows the cushioning layer to dynamically adapt to incoming catalyst particles, maintaining uniform pressure distribution even at high loading rates by redistributing forces through fluidization.
3Ease of operation
If the loading device is inserted into the tube, then catalyst loading can proceed, but the device may become stuck and require dislodging
Solution Approach 1:
The cushioning layer is introduced beforehand to create a compliant environment within the tube. This cushioning prevents the loading device from becoming stuck by providing a yielding medium that accommodates device movement and prevents binding, simplifying operation while avoiding complex retrieval mechanisms.
Data Source
AI summary
Particulate filling devices and methods are disclosed that use a loading system generally including a loading cart, a drive system, and a line assembly. The drive system generally includes a motor, a drive shaft, a driven shaft, a spool, a plurality of cable partitions, and a controller. Each line assembly generally includes cable sections, swivel connectors, one or more spring blocks and a weight.