Catalyst Injection System for FCC Units
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Solution Overview
Problem
Conventional catalyst and additive injection systems in fluidized catalytic cracking (FCC) units are limited by large storage hoppers that occupy valuable space, require multiple loaders for different types of catalysts and additives, and expose materials to pressurized air, leading to potential contamination and measurement inaccuracies.
Innovation Solution
A system utilizing a dust collector and vacuum producer to draw catalysts and additives from storage bins directly into a loading unit, which can be pressurized to inject them into the FCC unit, allowing for selective and efficient transfer without the need for large storage hoppers and enabling simultaneous use of multiple types of catalysts and additives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large storage hopper is used to store catalyst and additive, then the catalyst and additive can be stored in sufficient quantity, but the space occupied by the storage hopper increases significantly
Solution Approach 1:
The invention divides the storage system into multiple small storage bins instead of using one large storage hopper. Each bin can store different types of catalyst or additive, and the loader can selectively draw from any bin. This segmentation maintains total storage capacity while dramatically reducing the footprint and allowing flexible arrangement in limited refinery space.
Solution Approach 2:
The loader is designed with a universal capability to draw catalyst or additive from any of the multiple storage bins and inject it into the FCC unit. This multi-functional design eliminates the need for separate dedicated loaders for different materials, reducing the overall equipment footprint while maintaining the ability to handle various catalyst and additive types.
2Reliability
If a dedicated storage hopper is assigned to each type of catalyst and additive, then the materials can be stored separately, but the number of loaders required increases
Solution Approach 1:
The loader is designed as a universal device that can handle multiple types of catalyst and additive through a single unit. It features a multi-position valve system that can direct material from any storage bin to the injection point, eliminating the need for multiple dedicated loaders while maintaining proper material separation and prevention of cross-contamination.
Solution Approach 2:
The loader acts as an intermediary between the multiple storage bins and the FCC unit. It provides a centralized control point that manages material flow from various sources without requiring separate injection systems for each material type, thereby simplifying the overall system architecture.
3Ease of operation
If pressurized air is used to transfer catalyst and additive to the transfer pot, then the transfer can be facilitated, but the catalyst and additive may be exposed to moisture and contaminants
Solution Approach 1:
The system uses a controlled pneumatic transfer mechanism where pressurized air is introduced into the transfer pot after the catalyst or additive has been drawn into it by vacuum. This approach facilitates the transfer to the FCC unit while minimizing exposure time to potentially contaminated air, as the material is already enclosed in the transfer pot during the pressurization phase.
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 solution reduces space requirements, minimizes exposure to contaminants, improves measurement accuracy, and allows for flexible and efficient injection of different catalysts and additives, thereby saving time, labor, and resources while maintaining the quality of the materials.
Implementation Method 1
a vacuum producer in fluid communication with the dust collector so that the vacuum producer generates a vacuum within the dust collector that draws the one of the catalyst and/or additives into the dust collector
Implementation Method 2
The storage hopper may be pressurized in some applications to facilitate transfer of the catalyst and/or additive to the transfer pot
Data Source
AI summary
A preferred embodiment of a system for loading catalyst and/or additives into a fluidized catalytic cracking unit includes a bin for storing at least one of the catalyst and/or additives, and a loading unit in fluid communication with the storage bin and the fluidized catalytic cracking unit on a selective basis. The loading unit is capable of being evacuated so that a resulting vacuum within the loading unit draws the catalyst and/or additive from the bin. The loading unit is also capable of being pressurized so that the catalyst and/or additive is transferred from the loading unit to the fluidized catalytic cracking unit.