Slop Oil Treating Device Using Centrifugal Separation
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Solution Overview
Problem
Current slop oil treatment technologies face challenges in effectively separating oil and water due to the high stability of emulsified mixtures and the instability of surfactant-based demulsifiers, leading to inefficient removal of emulsion nuclei and potential secondary pollution from wastewater treatment.
Innovation Solution
A slop oil treating device comprising a pretreatment device, solid-liquid separator, demulsification nucleus-increasing treating device, squeezing filter press, three-phase separator, buffer tank, and pumps, which includes pre-heating, solid-liquid separation, high-speed centrifugal separation, and demulsification treatments to achieve efficient oil-water separation and reduce solid impurities, with adjustable operating parameters for different oil products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical demulsifiers are used to treat slop oil, then oil-water separation is promoted, but the demulsifiers are unstable and ineffective against highly stable emulsions
Solution Approach 1:
The patent changes the fundamental approach from chemical demulsification to physical separation by centrifugal force. The centrifugal separator uses rotational motion to create centrifugal force that separates oil, water, and solid particles based on their different densities, bypassing the limitations of chemical demulsifier effectiveness against stable emulsions.
Solution Approach 2:
The patent replaces the chemical demulsification system with a mechanical centrifugal separation system. The centrifugal separator uses mechanical rotation to achieve separation, substituting the chemical action of demulsifiers with mechanical force that effectively handles highly stable emulsions regardless of chemical reagent sensitivity.
2Reliability
If solid suspensions (emulsion nuclei) are not removed, then oil-water emulsification persists, but conventional treating devices fail to effectively remove these solid suspensions
Solution Approach 1:
The patent segments the treatment process into distinct stages: first removing solid particles through centrifugal separation, then separating oil and water phases. This segmentation allows each stage to target specific components effectively, with the centrifugal separator specifically addressing solid suspension removal that conventional devices fail to achieve.
Solution Approach 2:
The centrifugal separator acts as an intermediary device that first removes solid emulsion nuclei from the slop oil before the oil-water separation occurs. This intermediate step of solid particle removal is crucial for breaking the stable emulsion structure, enabling subsequent effective oil-water separation that conventional single-stage devices cannot achieve.
3Object-affected harmful factors
If wastewater treatment is performed for separated water, then environmental pollution is reduced, but treatment cost and process complexity increase
Solution Approach 1:
The centrifugal separator performs self-service by achieving thorough separation of oil, water, and solids in a single device. The separated water contains minimal oil and solid contaminants due to the high separation efficiency, reducing or eliminating the need for additional wastewater treatment processes and associated complexity.
Solution Approach 2:
The patent recovers clean separated water with minimal contaminants through efficient centrifugal separation. By achieving such thorough separation in the primary treatment device, the system can discard or reuse the water with minimal additional treatment, reducing both cost and process complexity compared to conventional approaches requiring extensive wastewater treatment.
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 device achieves over 96% removal of solid impurities, reduces BS&W to 0.6-1.5% and OIW to 55-150 ppm, and allows for the reuse of treated oil and solid residue as raw materials, minimizing hazardous waste and improving processing efficiency.
Implementation Method 1
The slop oil is subjected to a pre-heating at a temperature ranging from 90°C to 92°C in the pretreatment device
Implementation Method 2
the slop oil is subjected to a pre-heating at a temperature ranging from 90°C to 92°C in the pretreatment device, and then conveyed to the solid-liquid separator for separation
Implementation Method 3
The oil and water after the first-stage separation enter the three-phase separator for a second-stage high-speed centrifugal separation
Implementation Method 4
Solid residue obtained after a first-stage separation enters the squeezing filter press for solid-liquid squeezing
Data Source
Figure 1
AI summary
The present invention discloses a slop oil treating device, including a pretreatment device, a solid-liquid separator, a demulsification nucleus-increasing treating device, a squeezing filter press, a three-phase separator, a buffer tank, a feeding pump, a circulating pump, a conveying pump, and an outputting pump. The slop oil is subjected to a pre-heating at a temperature ranging from 90°C to 92°C in the pretreatment device, and then conveyed to the solid-liquid separator for separation. Solid residue after a first-stage separation enters the squeezing filter press for solid-liquid squeezing. The squeezing filter press discharges the squeezed solid residue and conveys the squeezed waste water to the demulsification nucleus-increasing treating device. Oil and water after the first-stage separation enter the three-phase separator for second-stage highspeed centrifugal separation. Oil separated by the three-phase separator is conveyed to the buffer tank, and conveyed to a storage tank through the outputting pump, water separated by the three-phase separator is conveyed to a waste water treatment workshop for processing, and emulsion separated by the three-phase separator is conveyed to the demulsification nucleus-increasing treating device for a nucleus-increasing pretreatment, and then returned to the pretreatment device and the solid-liquid separator.