Ceramic Nanofiltration Membrane for Desalter Water Reuse
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Solution Overview
Problem
Conventional desalination technologies in the oil industry face challenges with high operational and maintenance costs, temperature limitations, sensitivity to oxidizing chemicals, and frequent membrane replacement due to the use of polymer-based membranes, making it costly and inefficient to treat desalter water effluent for reuse.
Innovation Solution
Implementing a ceramic nanofiltration (NF) membrane system that can withstand high temperatures, resist oxidizing chemicals, and tolerate dry conditions, allowing for single-step treatment and recycling of desalter water effluent, reducing the need for pre-treatment processes and extending water cycles in Gas and Oil Separation Plants (GOSPs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If polymer-based NF or RO membranes are used for desalination, then desalination can be achieved, but the membranes cannot withstand temperatures above 40°C and are damaged by organic contaminants, requiring cooling towers and pre-treatment facilities
Solution Approach 1:
The patent changes the material parameter of the membrane from polymer-based to ceramic-based, fundamentally altering the temperature and chemical resistance properties. Ceramic membranes can withstand temperatures up to 200°C and are immune to damage from oxidizing chemicals and organic contaminants, eliminating the need for cooling towers and pre-treatment facilities while maintaining desalination effectiveness
Solution Approach 2:
The patent employs ceramic composite materials with specific pore structures to create membranes that combine high temperature resistance, chemical inertness, and effective filtration capabilities. The ceramic material provides thermal and chemical stability while the controlled porosity enables selective separation of water from dissolved solids and organics
2Manufacturing precision
If conventional treatment systems with multiple processes (UF, air stripper, cooling system, RO) are used, then TDS and organics can be reduced, but the system complexity and footprint increase significantly
Solution Approach 1:
The patent merges multiple separate treatment functions (filtration, desalination, organic removal) into a single ceramic nanofiltration membrane process. The membrane's unique properties allow it to simultaneously reject dissolved solids, organic contaminants, and bacteria in one step, eliminating the need for sequential UF, air stripping, cooling, and RO processes
Solution Approach 2:
The ceramic nanofiltration membrane serves multiple functions simultaneously: it acts as a physical filter for particles, a selective barrier for dissolved solids, and a heat-resistant component that eliminates cooling requirements. This multi-functionality consolidates what would otherwise require multiple specialized equipment into a single integrated system
3Ease of manufacture
If polymer-based membranes are used, then initial installation is straightforward, but frequent replacement is required due to damage from oxidizing chemicals and organic contaminants, increasing maintenance costs
Solution Approach 1:
The patent transitions from disposable polymer membranes with short lifespans to durable ceramic membranes that can operate indefinitely under harsh conditions. The ceramic material's immunity to chemical degradation means the membrane does not require frequent replacement, transforming the economic model from recurring replacement costs to long-term asset investment
Solution Approach 2:
The patent replaces the chemically vulnerable polymer material with chemically inert ceramic material, substituting a mechanically simple but chemically fragile system with a mechanically robust and chemically resistant system. This substitution maintains ease of installation while dramatically extending service life
4Adaptability or versatility
If polymer-based membranes are allowed to dry up during extended operations, then operational flexibility is reduced, but maintaining continuous operation is required to prevent structure collapse
Solution Approach 1:
The patent creates an environment where the membrane is immune to the harmful effects of drying by using ceramic material that does not collapse when dry. This inherent resistance to structural change upon drying allows the system to tolerate extended shutdowns and operational interruptions without compromising membrane integrity, providing operational flexibility that polymer membranes cannot offer
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 ceramic NF membrane system effectively reduces Total Dissolved Solids (TDS) and organics, enabling the reuse of desalter water, conserving fresh water, reducing operational costs, and simplifying maintenance, while maintaining membrane integrity and extending its lifespan.
Implementation Method 1
a filtering system in the GOSP including a NF membrane configured to filter the desalter water effluent to attain filtered desalter water effluent within a pre-determined wash water threshold for wash water reuse, including: partially desalinating the desalter water effluent to attain a Total Dissolved Solids (TDS) of the desalter water effluent within a pre-determined TDS threshold
Implementation Method 2
a pump system configured to pump the desalter water effluent through the NF membrane and pump the filtered desalter water effluent to a supply line of the desalter
Data Source
AI summary
Systems and methods include a Gas and Oil Separation Plant (GOSP)-embedded treatment system for recycling desalter wash water. The system includes: 1) an inlet system providing an inlet stream of desalter water effluent received from at least one desalter of a source; 2) a filtering system in the GOSP including a nanofiltration (NF) membrane configured to filter the desalter water effluent to attain filtered desalter water effluent within a pre-determined wash water threshold for wash water reuse, including: partially desalinating the desalter water effluent to attain a Total Dissolved Solids (TDS) of the desalter water effluent within a pre-determined TDS threshold; and 3) a pump system configured to pump the desalter water effluent through the NF membrane and pump the filtered desalter water effluent to a supply line of the desalter.