Gas Phase Settling Tray for Reactor Fouling Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing reactor systems face fouling issues due to the accumulation of solid particle deposits, which lead to reduced heat transfer, increased pressure drop, and mechanical damage, ultimately resulting in shorter run lengths and increased maintenance costs.
Innovation Solution
The Gas Phase Settling (GPS) tray, comprising a plurality of filter devices with cylindrical v-wire filter elements, is installed in a downflow catalytic reactor to trap and settle entrained particles from the gas-phase feed stream, thereby reducing fouling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional reactor systems are used without filtration devices, then the reactor can process gas-phase feeds, but solid particle deposits accumulate causing fouling, increased pressure drop, and reduced heat transfer
Solution Approach 1:
The GPS tray is installed at the inlet of the reactor to perform preliminary separation of solid particles from the gas-phase feed before the feed enters the reactor. This preliminary action prevents particles from entering the reactor and accumulating on catalyst beds, thereby avoiding fouling issues before they occur.
Solution Approach 2:
The GPS tray acts as an intermediary device between the feed inlet and the reactor catalyst beds. It mediates the feed stream by removing solid particles through gravitational settling and filtration mechanisms, allowing only cleaned gas-phase feed to proceed to the reactor, thus protecting the catalyst from contamination.
2Object-affected harmful factors
If filtration trays or particle separators are installed to reduce fouling, then particle removal is improved, but pressure drop increases and device complexity increases
Solution Approach 1:
The GPS tray utilizes pneumatic principles by allowing the gas-phase feed to flow through the device and relying on gravitational settling and inertial separation to remove particles. The design incorporates open annulus areas and filtered gas streams that maintain smooth gas flow paths, minimizing pressure drop while effectively separating particles through fluid dynamics rather than restrictive mechanical filters.
Solution Approach 2:
The device changes the flow parameters of the gas stream by creating regions of different velocities and flow patterns within the reactor inlet. By manipulating gas flow velocity and direction through the open annulus areas and filtered passages, particles are separated through gravitational settling and inertial effects without requiring high-resistance filtration media that would increase pressure drop.
3Reliability
If dense layers of catalyst fines accumulate on catalyst beds, then fouling occurs, but this leads to excessive pressure-drop, flow maldistribution, and total plugging
Solution Approach 1:
The GPS tray performs preliminary removal of catalyst fines and solid particles from the gas feed before the feed contacts the catalyst bed. This preliminary action prevents the formation of dense fouling layers on the catalyst, maintaining proper flow distribution and preventing plugging issues before they can develop.
Solution Approach 2:
The GPS tray serves as a protective intermediary between the feed system and the catalyst bed. It intercepts and removes solid particles that would otherwise deposit on the catalyst, ensuring that the catalyst bed receives clean gas-phase feed and maintains optimal flow distribution and productivity throughout its operational life.
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 GPS tray effectively removes small-scale solids from the gas-phase feed, delaying pressure drop increase and extending run lengths by minimizing solid particle accumulation in the reactor, thus enhancing process efficiency and reducing maintenance costs.
Implementation Method 1
Each filter device of the GPS tray comprises a cylindrical v-wire filter element to filter the entrained particles
Implementation Method 2
trap particles entrained within an inlet gas feed stream, by particle filtration and settling
Implementation Method 3
A first portion of gas stream flows radially through the slits to form a filtered gas stream
Implementation Method 4
a second portion of gas feed stream flows upward along a length of the v-wire filter element, into the open annulus area and downward into the hollow internal passage
Data Source
AI summary
A device for filtering and settling entrained particles from a gas feed stream, the device comprising a cylindrical v-wire filter element to filter the entrained particles, a cap located above the v-wire filter element comprising an outer surface, an under surface, and a downward rim attached to a perimeter of the under surface, and an open annulus area located between and in fluid communication with an open top portion of the v-wire filter element and the under surface of the cap.