Process Stream Decontamination Systems and Methods with Recirculation of Decontaminant

Abstract

A decontamination system for decontaminating at least one contaminant in a process stream. Decontaminant liquid is dispersed into the process stream using atomization. A controller detects contaminant levels in the process stream and adjusts the flow of decontaminant fluid into the process stream in response.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The invention relates generally to systems and methods used to decontaminate process streams that contain at least one contaminant. In particular aspects, the invention relates to systems and methods for decontaminating natural gas, liquid petroleum products or water in pipelines or production streams and for monitoring and control of the decontamination process.[0003]2. Background of the Invention[0004]Regulations require companies that produce or supply natural gas, crude oil, liquid petroleum gas or water to monitor product contaminants, mitigate potential hazards and maintain quality specifications. Typical contaminants include hydrogen sulfide (H2S), carbon dioxide (CO2), oxygen (O2), and biological populations. These contaminants can cause pipeline corrosion and subsequent rupture, narrowing of the line due to deposits, plugging, precipitation of solids, etc. Hydrogen sulfide, for example, is a highly corrosive an...

AI Technical Summary

Benefits of technology

The present invention is a decontamination system that introduces decontaminants into a process stream by spraying them in a gaseous state. The system uses an atomizing spray with droplets no larger than 50 microns in diameter, which ensures optimal contact time and exposure. The system also includes a recirculation mechanism for reusing the decontaminant and a controller that automatically adjusts the amount of decontaminant added based on the level of contaminant detected. The system can accurately and continuously monitor, identify, and quantify contaminants in real-time, and will log and manage the data via the controller. The technical effects of this system are improved decontamination efficiency, reduced waste, and better management of contaminant data.

Problems solved by technology

These contaminants can cause pipeline corrosion and subsequent rupture, narrowing of the line due to deposits, plugging, precipitation of solids, etc.

Hydrogen sulfide is not only harmful to humans, but when left untreated, can quickly corrode pipelines, potentially leading to ruptures and explosions.

This is an extremely low concentration and can be difficult to measure accurately.

Conventional methods for treatment of contaminants have drawbacks.

Inaccuracies in measurement of the contaminant frequently lead to overuse of injected curative.

Operators routinely overcompensate when attempting to mitigate a risk by injecting excess chemical into the process stream.

Because chemicals can be expensive, overuse translates into significant financial waste.

Additionally, high levels of excess chemical can accumulate and must be removed or can build up on the pipeline wall, creating a rock-hard scale.

Under certain conditions, rock hard scale builds up and can restrict the flow of gas causing further negative effects.

If too much scale accumulates, the pipeline will require treatment with other potentially hazardous and expensive chemicals resulting in further health and safety risks and monetary loss.

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