JP-7856860-B1 - Liquid separation system and liquid separation method

Abstract

[Problem] To provide a liquid separation system that can more precisely separate a stock solution into a light liquid and a heavy liquid. [Solution] The liquid separation system 1 comprises a centrifugal separator 2 that separates a raw liquid US containing light liquid and heavy liquid into a first liquid LF1 mainly composed of light liquid and a second liquid HF1 mainly composed of heavy liquid, a coalescer filter 3 to which the separated liquid SS1 consisting of the first liquid LF1 or the second liquid HF1 is supplied, and a housing 5 that houses the coalescer filter 3. The coalescer filter 3 causes the minute heavy liquid or minute light liquid remaining in the separated liquid SS1 to grow into coarse droplets, and as the coarse droplets settle or float, a light liquid layer LF2 mainly composed of light liquid and a heavy liquid layer HF2 mainly composed of heavy liquid are formed inside the housing 5. [Selection Diagram] Figure 1

Inventors

• 恩蔵 浩太郎
• 加治 圭介

Assignees

• 三菱化工機株式会社

Dates

Publication Date

20260511

Application Date

20250425

Priority Date

20240619

Claims (6)

1. A centrifuge that separates a stock solution containing a light liquid and a heavy liquid into a first liquid mainly composed of the light liquid and a second liquid mainly composed of the heavy liquid, A coalescer filter to which the separation liquid consisting of the second liquid is supplied, A housing for the aforementioned coalescer filter, Equipped with, The coalescer filter captures and aggregates the minute light liquid remaining in the separated liquid, causing it to grow into coarser droplets. As the coarse-grained droplets float within the housing due to the difference in specific gravity with the heavy liquid, a light liquid layer mainly composed of the light liquid and a heavy liquid layer mainly composed of the heavy liquid are formed within the housing. Liquid separation system.
2. The system further includes a return channel that returns the liquid constituting the light liquid layer separated by the coalescer filter back to the stock liquid supply pipe that supplies the stock liquid to the centrifuge. The liquid separation system according to claim 1 .
3. Inside the aforementioned housing, The system comprises the aforementioned coalescer filter and an oil-repellent filter disposed below the coalescer filter and having oil-repellent properties. The coalescer filter is positioned around the supply pipe that penetrates the lid of the housing and is inserted into the interior of the housing, The oil-repellent filter is inserted into the interior of the housing by penetrating the bottom of the housing, and is positioned around the discharge pipe that discharges the liquid separated by the oil-repellent filter, and The return channel is connected to the top of the housing. The liquid separation system according to claim 2 .
4. Inside the aforementioned housing, The system comprises the aforementioned coalescer filter and an oil-repellent filter disposed to the side of the coalescer filter and having oil-repellent properties. The coalescer filter is positioned around the supply pipe that penetrates the lid of the housing and is inserted into the interior of the housing, The oil-repellent filter is inserted into the interior of the housing by penetrating the lid of the housing, and is positioned around the discharge pipe that discharges the liquid separated by the oil-repellent filter, and The return channel is connected to the housing. The liquid separation system according to claim 2 .
5. Using the liquid separation system described in claim 1, The first step involves supplying a stock solution containing heavy liquid and light liquid to a centrifuge and separating it into a first liquid mainly composed of the light liquid and a second liquid mainly composed of the heavy liquid. A second step involves supplying a separation solution consisting of the first liquid or the second liquid to a coalescer filter. A third step involves growing the minute heavy liquid or minute light liquid remaining in the separated liquid into coarse droplets, A fourth step involves separating the coarsely sized droplets into a heavy liquid layer mainly composed of the heavy liquid and a light liquid layer mainly composed of the light liquid by allowing them to settle or float. including, Liquid separation method.
6. Furthermore, the fifth step includes returning the liquid constituting the heavy liquid layer or the liquid constituting the light liquid layer, separated by the coalescer filter, back to the original liquid. The liquid separation method according to claim 5 .

Description

This invention relates to a liquid separation system and a liquid separation method. Generally, a centrifuge, such as the one described in Patent Document 1, is known as a device for separating a stock solution containing a light liquid such as oil and a heavy liquid such as water into the light liquid and the heavy liquid. As a characteristic of centrifuges like the one described in Patent Document 1, larger particles, coarse particles, particles with high mass, and liquid droplets can be easily separated because the larger they are, the greater the centrifugal force that acts upon them. Japanese Patent Publication No. 2011-255257 This is a schematic diagram showing a liquid separation system and liquid separation method according to the first embodiment.This is a schematic diagram of the filter section, which contains a coalescer filter within the enclosure.This is a schematic diagram showing that the separated liquid is supplied to the filter section and coarse droplets of heavy liquid are formed outside the coalescer filter.This is a schematic diagram showing that the separated liquid is supplied to the filter section and coarse droplets of heavy liquid are formed outside the coalescer filter.This is a schematic diagram illustrating the formation of a heavy liquid layer and a light liquid layer within the enclosure.This is a process diagram of the liquid separation method according to the first embodiment.This is a schematic diagram showing a liquid separation system and liquid separation method according to the second embodiment.This is a schematic diagram illustrating the supply of a separation liquid to a water-repellent filter section according to the second embodiment, and the removal of moisture as water droplets.This is a schematic diagram showing a liquid separation system and liquid separation method according to the third embodiment.This is a schematic diagram showing a liquid separation system and liquid separation method according to the fourth embodiment.This is a schematic diagram showing a liquid separation system and liquid separation method according to the fifth embodiment.This is a schematic diagram showing a liquid separation system and liquid separation method according to the sixth embodiment. [First Embodiment] A liquid separation system 1 and liquid separation method according to the first embodiment of the present invention will be described in detail with reference to Figures 1 and 2A to 2E. Figure 1 is a schematic diagram showing a liquid separation system 1 and liquid separation method according to the first embodiment, illustrating the case in which a raw liquid US containing a heavy liquid in a light liquid is separated by the liquid separation system 1. Figure 2A is a schematic diagram of the filter section 50, which contains a coalescer filter 3 within the housing 5. In the following description, the vertical direction will be described as the vertical direction perpendicular to the upper surface of the housing 5 of the coalescer filter 3 in Figures 1, 2A to 2D. Liquid separation system As shown in Figure 1, the liquid separation system 1 is a device that separates a stock solution US (Undiluted Solution (hereinafter referred to as "US")) containing a light liquid and a heavy liquid into a light liquid and a heavy liquid. The liquid separation system 1 comprises a centrifuge 2, a stock solution supply pipe 22, a separated light liquid supply pipe 23, a separated heavy liquid outlet pipe 24, a coalescer filter 3, a housing 5, a return channel 33, and a discharge pipe 34. <<Concentrate, light liquid, and heavy liquid>> The US concentrate is a liquid containing a light liquid with a lower specific gravity and a heavy liquid with a higher specific gravity than the light liquid. The light liquid is, for example, oils such as kerosene, diesel fuel, aircraft fuel, and gasoline. The heavy liquid is, for example, water, which has a higher specific gravity than oils. <First liquid and second liquid> The first liquid LF1 (Light Fluids 1, hereinafter referred to as "LF1") and the second liquid HF1 (Heavy Fluids 1, hereinafter referred to as "HF1") are liquids separated from the original liquid US by the centrifuge 2. The first liquid LF1 is a liquid mainly composed of light liquid, which is the light liquid that collects near the rotating shaft when the stock liquid US is centrifuged in the centrifuge 2. The proportion of light liquid in the first liquid LF1 is, for example, 90% or more. The second liquid HF1 is a liquid mainly composed of heavy liquid, and is the heavy liquid that collects at a position far from the axis of rotation when the stock liquid US is centrifuged in the centrifuge 2. The proportion of heavy liquid in the second liquid HF1 is, for example, 90% or more. Here, we will illustrate the main liquids that will be described sequentially in this embodiment. "Undiluted US" refers to the liquid being separated in this study, which contains a light liquid with a lower s