Disc Stack Centrifugal Separation With Adjustable Phase Interface
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Solution Overview
Problem
Existing purification systems struggle to efficiently separate and purify both light and heavy phases in contaminated products like slop oil, as the composition varies between batches, leading to inconsistent purification results and the need for additional steps to handle heavy phase separation.
Innovation Solution
A disc stack centrifugal separator system with controlled backpressure at the light and heavy phase outlets, allowing the interface between phases to be adjusted based on the proportion of heavy phase content, utilizing larger distribution holes to maximize separation efficiency across varying compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a disc stack centrifugal separator is used for separation of oil and water in slop oil treatment, then separation of light phase and heavy phase is achieved, but the system cannot efficiently handle varying compositions between different batches and cannot purify both oil and water phases effectively
Solution Approach 1:
The invention applies dynamics by making the interface position between oil and water phases adjustable through backpressure control. The system transitions from a fixed interface position to a dynamic one that can be moved along the disc stack axis by controlling the backpressure at outlets, allowing adaptation to varying batch compositions while maintaining reliable purification of both phases
Solution Approach 2:
The invention changes the backpressure parameter at the light phase and/or heavy phase outlets to control the interface position. By adjusting this parameter, the system adapts to different batch compositions (varying oil-water ratios) while ensuring both phases are effectively purified, resolving the contradiction between adaptability and purification reliability
2Adaptability or versatility
If the interface position between light phase and heavy phase is fixed in the disc stack, then the system structure is simple, but the system cannot optimize separation for different proportions of heavy phase content in contaminated products
Solution Approach 1:
The invention introduces backpressure as a controllable parameter to adjust the interface position between phases. This parameter change allows the system to optimize separation for different heavy phase proportions without fundamentally redesigning the disc stack structure, achieving adaptability with minimal added complexity
Solution Approach 2:
The system incorporates feedback by determining the proportion of heavy phase content in the contaminated product and using this information to control the backpressure. This closed-loop control enables the interface position to be optimized for each batch composition while maintaining a relatively simple overall system structure
3Productivity
If distribution holes are made smaller in the disc stack, then the separation precision is improved, but the distribution part occupies less area and reduces overall separation capacity
Solution Approach 1:
The invention extends the distribution part along the axis of the disc stack, utilizing the third dimension (length along the stack) to increase the total distribution area. This allows larger distribution holes to be used without reducing the overall distribution capacity, thereby maintaining both high separation precision and high productivity
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
Enables efficient purification of both light and heavy phases within the same system, optimizing separation by dynamically adjusting the interface position within the disc stack, thereby improving overall purification efficiency and flexibility for different batches.
Implementation Method 1
a disc stack centrifugal separator, wherein said disc stack centrifugal separator comprises: an inlet for receiving the contaminated product to be purified in said disc stack centrifugal separator; a disc stack comprising a number of stacked discs
Implementation Method 2
at least one pressure control device provided in connection with at least one of the light phase outlet of the disc stack centrifugal separator and the heavy phase outlet of the disc stack centrifugal separator, whereby a level of backpressure provided to the light phase outlet and/or the heavy phase outlet can be controlled
Data Source
AI summary
A purification system (1) includes a disc stack centrifugal separator (3) with a disc stack (31) made of stacked discs (33) having circumferentially spaced-apart distribution holes (39). The distribution holes are configured to distribute a contaminated product over a distribution part (41) of a curved surface area (35) of the disc stack. The distribution part extends around the circumference of the disc stack and over 20%-70% of a total distance (d) between a base periphery (37a) and a top periphery (37b) of the disc stack. At least one pressure control device (11a, 11b) is fluidly connected with at least one of a light phase outlet and a heavy phase outlet and controls a level of backpressure provided to the light phase outlet and/or the heavy phase outlet to adjust a position of an interface between a light phase and a heavy phase in the disc stack during purification.