Real-Time Additive Injection for Precise H2S Scavenging
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Solution Overview
Problem
Current methods for treating large volumes of oil or fuel with chemical additives, such as monoethanoloamine (MEA) and monomethylamine (MMA) triazine, to scavenge hydrogen sulfide (H2S), result in inefficient use due to excessive additive amounts required to ensure complete scavenging, leading to high costs and potential hazards.
Innovation Solution
A real-time fuel additive processing system that includes a fuel additive storage tank, injection nozzle, liquid conduit, pump, flow rate transmitter, chemical analyzer, and flow rate controller, which continuously monitors and adjusts the flow rate of additives in the fuel transport line to precisely target and treat H2S, optimizing additive usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If batch type treatment with excessive chemical additive is used to ensure complete H2S scavenging, then reliability of H2S removal is improved, but loss of substance (chemical additive waste) increases
Solution Approach 1:
The system employs a closed-loop feedback mechanism where the chemical analyzer continuously monitors H2S levels in the crude oil and provides real-time data to the flow rate controller. The controller adjusts the chemical additive injection rate based on actual H2S concentrations, ensuring complete scavenging while minimizing waste by matching additive dosage precisely to contamination levels.
Solution Approach 2:
The system dynamically changes the flow rate parameter of chemical additive based on real-time H2S concentration measurements. Instead of using a fixed excessive dosage, the flow rate controller modulates the additive injection rate to match the actual H2S load, optimizing both effectiveness and efficiency.
2Reliability
If batch type treatment with excessive chemical additive is used, then reliability of H2S removal is improved, but productivity decreases
Solution Approach 1:
The system transitions from batch-type intermittent treatment to continuous real-time treatment. The chemical analyzer and flow rate controller operate continuously during crude oil transfer, maintaining constant monitoring and adjustment of chemical additive injection. This ensures uninterrupted H2S scavenging throughout the transfer process, improving overall processing efficiency.
Solution Approach 2:
Real-time feedback from the chemical analyzer enables immediate adjustment of chemical additive dosage, eliminating the need for excessive overage and allowing precise treatment throughout the continuous transfer process, thereby improving productivity.
3Loss of substance
If real-time continuous monitoring and adjustment system is implemented, then loss of substance (chemical additive waste) is reduced, but device complexity increases
Solution Approach 1:
The flow rate controller serves multiple functions: it receives signals from both the chemical analyzer and flow rate transmitter, processes this information, and controls the chemical additive injection pump. This multi-functionality reduces the need for separate dedicated components for each control function, thereby limiting the increase in system complexity.
Solution Approach 2:
The flow rate controller acts as an intermediary device that integrates signals from the chemical analyzer and flow rate transmitter and translates them into appropriate pump control signals. This single intermediary component simplifies the overall system architecture compared to having separate control mechanisms for each input.
4Productivity
If real-time continuous monitoring and adjustment system is implemented, then productivity is improved, but device complexity increases
Solution Approach 1:
The continuous operation of the chemical analyzer and flow rate controller during the entire crude oil transfer process eliminates interruptions and ensures constant H2S scavenging, significantly improving productivity despite the added system complexity.
Solution Approach 2:
The real-time feedback mechanism enables immediate response to changing H2S conditions throughout the transfer process, ensuring continuous effective treatment and maximizing processing efficiency.
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 system reduces the overabundance of additive chemicals from 40% to 10-15%, enhancing efficiency and reducing costs by ensuring precise treatment of H2S in real-time during fuel transport, rather than relying on batch processing.
Implementation Method 1
a chemical analyzer coupled to the fuel transport line for sensing the quantity of a target chemical within the fuel flowing through the fuel transport line
Implementation Method 2
a liquid pump coupled to the fuel additive liquid conduit
Implementation Method 3
an additive chemical or chemical additive may be added to the crude oil to scavenge the H2S and render it harmless
Data Source
AI summary
A real time additive processing system for crude oil or refined fuel products is coupled to a fuel transport line that transfers fuel from one storage tank to another storage tank. The fuel additive processing system includes a fuel additive storage tank coupled to a liquid conduit having a liquid pump with a speed/stroke controller that regulates the liquid pump. The liquid conduit is coupled to the fuel transport line at a fuel additive injection nozzle. The fuel additive processing system also includes a flow rate transmitter and a chemical or physical property analyzer coupled to the fuel transport line downstream of the additive injection nozzle. The flow rate transmitter transmits the flow rate of the fuel passing through the fuel transport line. The fuel additive processing system includes a flow controller that communicates with the liquid pump speed/stroke controller, flow rate transmitter and chemical or physical property analyzer.