Paraffin Control Unit Using Staged Electric Immersion Heaters
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Solution Overview
Problem
Conventional heater treaters in the oil and gas industry face inefficiencies and safety hazards due to fire tube failures, energy wastage by heating the water phase, and low thermal efficiency, which leads to incomplete separation of oil from water and increased risk of fires.
Innovation Solution
The use of electric immersion heating elements directly in the crude oil phase with staged heating and automated solid removal, maintaining paraffin wax in solution and efficiently separating oil and gas phases, while minimizing the risk of fire and optimizing energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If fire tube heater treaters are used to heat crude oil, then heating function is provided, but thermal efficiency is low and energy is wasted by heating water phase
Solution Approach 1:
The invention extracts the heating function from the water phase and applies it directly to the oil phase using electric immersion heaters. The heaters are immersed directly in the crude oil, eliminating the intermediate water phase heating step and the associated energy losses through convection and radiation to the water.
Solution Approach 2:
The invention introduces electric immersion heaters as a direct heating intermediary between the power source and the crude oil. This eliminates the need for fire tubes that heat water which then indirectly heats oil, providing direct and efficient heat transfer to the oil phase only.
2Temperature
If fire tube heater treaters are used, then heating is provided, but safety hazards and fire risks increase
Solution Approach 1:
The invention replaces the mechanical fire tube heating system with an electric heating system. Electric immersion heaters eliminate open flames and high-temperature combustion processes, significantly reducing fire hazards while maintaining effective heating capability through direct electrical resistance heating of the crude oil.
Solution Approach 2:
The electric heating system operates without requiring an oxygen-rich combustion environment. By using electrical resistance heating directly in the oil, the system eliminates the need for fire tubes that require atmospheric oxygen for combustion, thereby creating a safer operating environment with reduced fire risk.
3Quantity of substance
If conventional heater treaters are used, then separation is attempted, but incomplete separation of oil from water occurs
Solution Approach 1:
The invention applies localized heating directly to the oil phase through immersed heaters, creating temperature gradients that enhance the separation process. By heating the oil specifically rather than the entire water-oil mixture, the system improves phase separation efficiency and prevents emulsion formation that would hinder complete separation.
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 approach enhances thermal efficiency, prevents paraffin precipitation, and ensures safe and efficient heating of crude oil, reducing energy consumption and operational risks, thereby improving the separation process and preventing off-spec crude oil production.
Implementation Method 1
heat generated from the plurality of electric immersion heaters is transmitted directly to the oil phase and maintains paraffin wax in solution
Implementation Method 2
heat generated from the plurality of electric immersion heaters is transmitted directly to the oil phase
Implementation Method 3
the vessel is adapted to separate the influent petroleum stream into component phases of gas, oil and solids
Implementation Method 4
maintains paraffin wax in solution in the oil phase and wherein the plurality of electric immersion heaters are staged at intervals throughout the vessel to maintain the temperature of the oil phase at a desired temperature
Data Source
AI summary
A paraffin control unit with staged high voltage temperature controlled electric immersion heaters to maintain the paraffin component of the crude oil in the liquid phase. The paraffin control unit removes large volumes of naturally occurring fine sand from the incoming liquids while also removing the crude oil from the influent fluid stream, the natural gas from the influent fluid stream, salt water from the influent fluid stream, all while maintaining the temperature of the crude oil fraction above the cloud point of its paraffin constituent. The removed sand is collected in sand pans and is automatically removed at timed intervals. The automation assures that the accumulating sand is removed from the sand pans as rapidly as it accumulates, thus preventing an over-accumulation of sand. The process fluids flow through a coalescer and a baffle assembly which purify and separate the component phases suitable for custody transfer.