CN110668587A - Separation device for immiscible liquids - Google Patents

Abstract

The invention provides a separation device for immiscible liquid, comprising a closed container, the container has a first inlet, a second inlet, a first outlet and a second outlet; a fan is connected to a switching unit; the switching unit has a first port , the second port, the third port and the fourth port; the buoyant member blocks the second inlet when it rises in the container, and opens the second inlet when it falls; The guide rail moves up and down; the valve controls the opening and closing of the first inlet. The present invention has the advantages of high separation efficiency.

Description

Separation device for immiscible liquids

technical field

The present invention relates to liquid separation, in particular to a separation device for immiscible liquids.

Background technique

Cutting fluid is a metal working fluid used to cool and lubricate in the process of cutting, grinding and grinding. There are many kinds and complex components, usually including base oil, emulsifier, rust inhibitor, etc. Cutting fluids (mainly for water-based cutting fluids) often have problems such as miscellaneous oils and particles during use. These miscellaneous oils are mainly caused by the introduction of workpieces or the leakage of hydraulic oil and guide rail oil of machine tools. Traditional machine tools have their own oil-water separation operation. The steel belt degreaser is used to separate the oil in the used cutting fluid, but the processing speed is slow and the effect is limited, resulting in a thick oil layer suspended on the surface of the liquid, which breeds for a long time. Microorganisms affect cutting fluid performance.

Release agent is an indispensable auxiliary material in die-casting production. In the process of die-casting production, in order to improve the service life of the mold cavity, make the die-casting part demold smoothly, and ensure the surface of the die-casting part is smooth and clean, the contour is clear and complete, it must be "released". "Molding agent", in the production of die casting, a large amount of release agent will be sprayed on the mold, some of the release agent will evaporate at high temperature, some will be absorbed on the mold for consumption, and most will flow directly under the mold after one-time use , which becomes oily waste liquid, which is generally collected through the ditch below the die-casting machine for subsequent treatment.

The degreasing process is a basic process in the pre-treatment process of automobile painting. After the body-in-white is welded, there are many dirty oils on the inner and outer surfaces and inner cavities of the body, including cooling oil, anti-stretching oil and anti-rust oil. Problems in the degreasing process will affect the quality of the electrophoretic paint, which in turn affects the adhesion and corrosion resistance of the paint film. With the increasing number of vehicles passing on the production line, the oil content of the degreasing solution also increases. If the dirty oil is not cleanly treated, the electrophoresis tank will be polluted, and even lead to the shutdown of the painting workshop for rectification. Therefore, the degreasing tank solution should be taken out for oil-water separation operation.

The purification and reuse of cutting fluid, mold release agent and degreasing agent can save production and processing costs on the one hand, and reduce the discharge of hazardous wastes on the other hand to achieve green and clean production. The main purpose of purification and reuse treatment is to separate the miscellaneous oil mixed into it. Common oil-water separation methods include physical separation method and chemical separation method. The main methods for removing the mixed oil are heating separation method, filtration separation method, air flotation separation method, ultrafiltration membrane separation method, reverse osmosis separation method, coalescence separation method and centrifugal separation method; the main method of chemical separation is through demulsifier To achieve demulsification, it is generally not used because the addition of chemicals will affect the composition of the liquid to be treated and increase the difficulty of separation.

The following are the most common separation methods:

The shortcomings of the above-mentioned separation methods are:

1. The heating separation method adopts steam or heating device for demulsification, the equipment is simple and the investment is low, but the oil removal effect is poor and the energy consumption is large;

2. Gravity or air flotation separation is based on the density or buoyancy of oil and water, the method is simple, and the oil removal effect is stable, but it takes a long time;

3. Coalescing and separation Through the coarse-grained material, the oil content dispersed in the water increases, until the buoyancy is greater than the adhesion force and floats up. The equipment is simple, the investment is low, and the use period of the coalescing material is long, but it needs to be based on different oily wastes. The use of coalescing fillers that are not used in the liquid selection greatly reduces the adaptability of the method;

4. Using the selective permeability principle of hollow fiber membrane, the oil-water separation effect is good, but it will remove some active ingredients at the same time, high cost, large investment, and complicated equipment operation is difficult;

5. Filtration and separation generally use lipophilic materials to absorb the oil in the solution, the effluent water quality is good, the equipment is miniaturized and the operation is simple, but the equipment investment is high, and the regeneration of the filter material and filter bag is difficult;

6. Centrifugal separation method uses centrifugal force generated by rapid rotation to make water with high density flow to the outside along the annular path, while oil with low density is thrown to the inner ring, and aggregates to form large oil droplets and floats up and separates, but daily maintenance is difficult and there are May destroy the active ingredients of the liquid to be treated.

SUMMARY OF THE INVENTION

In order to solve the deficiencies in the above-mentioned prior art solutions, the present invention provides a separation device for immiscible liquid with good separation effect, automation, accurate separation and multi-function.

The purpose of this invention is to realize through the following technical solutions:

Separation device for immiscible liquid, the separation device for immiscible liquid includes a closed container, the container has a first inlet, a second inlet, a first outlet and a second outlet, from top to bottom, the first The second inlet, the first outlet and the second outlet are arranged in sequence;

The device for separating the immiscible liquid also includes:

a fan, the fan is connected to the switching unit;

a switching unit, the switching unit has a first port, a second port, a third port and a fourth port; the first port selectively communicates with the second port and the fourth port, and the third port selectively communicates The second port and the fourth port; the input end of the fan communicates with the fourth port, and the output end communicates with the second port; the first port communicates with the outside world, and the third port communicates with the second inlet;

a buoyancy piece, the buoyancy piece blocks the second inlet when it rises in the container, and opens the second inlet when it falls;

a guide rail, the buoyant member moves up and down along the guide rail as the liquid level in the container changes;

a valve that controls the opening and closing of the first inlet: when the first port is in communication with the fourth port, and the second port is in communication with the third port, the first inlet is closed; when the first port is in communication When communicating with the second port, and when the third port is communicating with the fourth port, the first inlet is opened.

Compared with the prior art, the present invention has the following beneficial effects:

1. The separation is fast and the effect is good;

The combination of the fan and the switching unit is creatively used, so that the pressure in the closed container can be adjusted as needed:

When the first port of the switching unit is connected to the second port, and the third port is connected to the fourth port, the second inlet is in an open state, the valve is automatically opened, and the waste liquid enters the closed container through the first inlet, and the waste liquid is not in phase. The dissolved liquid is quickly separated, the liquid with lower density floats to the upper layer, and the liquid with higher density sinks to the lower layer, the separation of immiscible liquid is fast, and the separation effect is good;

2. Automation;

The combination of the buoyancy member and the second inlet is creatively used, so that when the first port of the switching unit is connected to the second port and the third port is connected to the fourth port, the valve automatically opens the first inlet, the liquid level in the container rises, and the With the rising liquid level in the closed container, the buoyancy element automatically blocks the second inlet, and there is no need to manually close the second inlet, and automatic control is realized;

In addition, when the first port of the switching unit is connected to the fourth port, and the third port is connected to the second port, the buoyant member is separated from the second inlet, the valve automatically closes the first inlet, and the liquid level in the container drops, thereby discharging the lower layer in the container The liquid with higher density can be discharged to a higher position (a position higher than the liquid level), without the need to manually open the second inlet, and realize automatic control;

3. Accurate separation;

Use the observation window to observe the rise of the liquid level in the container and the stratification effect of the liquid in real time. When the liquid level no longer rises and the separation of the incompatible liquid is completed, the first outlet is basically at the boundary between the upper and lower liquids. An outlet discharges the upper layer liquid above the first outlet in the container;

Afterwards, the first port of the switching unit communicates with the fourth port, and the third port communicates with the second port, the buoyant member is separated from the second inlet, and the lower layer liquid is discharged through the second outlet;

4. Multifunctional;

The use of rollers realizes the movement of the container; the use of filter units realizes the filtration of waste liquid, retains particulate matter, and ensures the cleanliness of the liquid after separation.

Description of drawings

The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. Those skilled in the art can easily understand that these drawings are only used to illustrate the technical solutions of the present invention, and are not intended to limit the protection scope of the present invention. In the picture:

FIG. 1 is a schematic structural diagram of a separation device for immiscible liquids according to an embodiment of the present invention.

Detailed ways

Figure 1 and the following description describe alternative embodiments of the invention to teach those skilled in the art how to implement and reproduce the invention. In order to teach the technical solutions of the present invention, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate that variations or substitutions from these embodiments will fall within the scope of the present invention. Those skilled in the art will appreciate that the following features can be combined in various ways to form various variations of the invention. Thus, the present invention is not limited to the alternative embodiments described below, but only by the claims and their equivalents.

Example 1:

Fig. 1 schematically shows the structure diagram of the separation device for immiscible liquid according to the embodiment of the present invention. As shown in Fig. 1 , the separation device for immiscible liquid includes:

The closed container 11, the container has a first inlet 21, a second inlet 22, a first outlet and a second outlet, the second inlet, the first outlet and the second outlet are arranged in order from top to bottom; the first The inlet 21 and the second inlet 22 can be arranged on the top wall of the container;

A fan 31, the fan 31 is connected to the switching unit 32;

a switching unit 32, the switching unit 32 has a first port, a second port, a third port and a fourth port; the first port selectively communicates with the second port and the fourth port, and the third port selectively The second port and the fourth port are connected to the ground; the input end of the fan is connected to the fourth port, and the output end is connected to the second port; the first port is connected to the outside world, and the third port is connected to the second inlet;

The buoyancy member 51, such as a floating ball, blocks the second inlet 22 when the buoyancy member 51 rises in the container, and opens the second inlet 22 when it falls;

a guide rail 52, the buoyancy member 51 moves up and down along the guide rail 52 as the liquid level in the container 11 changes;

Valve 41, the valve 41 controls the opening and closing of the first inlet 21: when the first port and the fourth port are in communication, and the second port and the third port are in communication, the first inlet 21 is closed; when all the When the first port is communicated with the second port, and the third port is communicated with the fourth port, the first inlet 21 is opened.

In order to realize automatic opening and automatic closing of the first inlet, further, the first valve includes:

A sealing plate, which is used to block the first inlet, is arranged in the container, and one end of the sealing plate is connected to the container.

In order to improve the sealing degree between the sealing plate and the first inlet, further, the part of the sealing plate that is in contact with the first inlet is made of flexible material.

In order to control the discharge of the separated upper layer liquid and lower layer liquid in the container, further, the separation device for the immiscible liquid also includes:

Separately provided valves 42-43 communicate with the first outlet and the second outlet respectively.

In order to retain the particulate matter in the waste liquid, further, the separation device for the immiscible liquid also includes:

The filter unit 81 , the inlet of the filter unit 81 is adapted to communicate with waste liquid, and the outlet communicates with the first inlet 21 .

In order to constrain the up-and-down movement and the left-right movement of the buoyant member, further, from top to bottom, the inner diameter R of the area enclosed by the guide rail 51 remains unchanged or gradually increases, and R≥R ₀ , where R ₀ is the buoyant member 51 the outer diameter.

In order to improve the moving convenience of the separation device, further, the separation device for the immiscible liquid further includes:

A roller 71 is provided at the bottom of the container 11 .

In order to observe the separation effect of the immiscible liquid in real time, further, the separation device of the immiscible liquid also includes:

The observation window 61 is made of a material that transmits visible light, and is arranged on the side wall of the container 11 .

Example 2:

The application examples of the separation device for immiscible liquids according to the embodiments of the present invention are the separation of oil and water in the treatment of cutting fluids, mold release agents, and degreasing bath fluids.

In this application example, as shown in FIG. 1 , the filter unit 81 is arranged on the upper part of the container 11 and adopts a stainless steel filter screen, and the filter diameter is not less than 0.1 μm; the waste liquid passes through the filter screen and the first inlet 21 in sequence, and then enters the container 11 . The valve 41 is arranged inside the container 11 and is on the lower side of the first inlet 21; the outer edge of the sealing plate is covered with a flexible sealing material, and one side of the sealing plate is connected to the inner wall of the container. The angle between the sealing plate and the first inlet is an acute angle, such as 30 degrees, 45 degrees, 60 degrees, preferably an acute angle less than 45 degrees; the guide rail 52 adopts a cylindrical structure with a through hole to ensure that the inside and outside of the cylindrical shape are connected, and the inner diameter R is not equal. change or gradually increase, and R≥R ₀ , for example, R=1.1R ₀ , R ₀ is the outer diameter of the buoyant member, R ₀ ≥ R ₁ , and R ₁ is the inner diameter of the second inlet; the first outlet The valve 42-43 is communicated with the second outlet respectively, and the roller 71 is installed at the bottom of the container; the side wall of the container adjacent to the boundary between the upper liquid and the lower liquid in the conventional container is provided with a transparent observation window 61; 51 uses a float.

The working mode of the separation device of the immiscible liquid of the present embodiment is:

Inlet steps:

The first port of the switching unit 32 is connected to the second port, and the third port is connected to the fourth port, the fan 31 works, and the second inlet is in an open state; at the same time, the sealing plate is lowered, and the angle between the first inlet and the valve becomes larger, and the valve 41 automatically opens the first inlet 21, and the pressure inside the container 11 is less than the pressure outside the container;

The waste liquid passes through the filter unit 81, and then enters the closed container 11 through the first inlet 21. The immiscible liquid in the waste liquid is quickly separated, the liquid with lower density floats to the upper layer, and the liquid with higher density sinks to the lower layer. The separation of immiscible liquid is fast and the separation effect is good;

As the liquid level in the container rises, the floating ball rising in the area enclosed by the guide rail 52 blocks the second inlet 22;

Draining steps:

Use the observation window 61 to check the liquid separation and liquid level rise in the container 11 in real time, when the separation is completed; open the valve 42, and the upper liquid above the first outlet in the container is discharged through the first outlet; Consistent, determines the certainty of the position of the liquid level in the container, that is, the certainty of the boundary between the upper liquid and the lower liquid, and the first outlet is arranged at the boundary;

After the upper layer liquid is discharged, the first port of the switching unit 32 is connected to the fourth port, and the third port is connected to the second port, the fan 31 works, the buoyant member 51 is separated from the second inlet 22, the sealing plate is moved, and the first inlet is connected. The angle between them gradually becomes smaller, the valve automatically closes the first inlet, and the pressure inside the container is greater than the pressure outside the container;

The valve 43 is opened, and the second outlet is communicated with the outside world; the liquid level in the container 11 drops, thereby discharging the liquid with a higher density in the lower layer in the container, and can be discharged to a higher position (a position higher than the liquid level);

The movement of the separation device is realized by using the roller 71;

When maintenance is required, open the filter unit 81 to clean the particles accumulated on one side of the filter screen.

The benefits achieved according to the application example of the present invention are: using the combination of the fan, the switching unit, the first inlet and the second inlet, the pressure in the container is lower than the external pressure, which improves the separation speed and separation effect of the immiscible liquid in the container; and The automatic opening and closing of the first inlet and the second inlet are realized; the position of the first inlet is based on the boundary between the upper liquid and the lower liquid in the container, and the upper liquid separated in the container is accurately discharged.

Claims (10)

1. Separation device for immiscible liquid, the separation device for immiscible liquid comprises a closed container, characterized in that: the container has a first inlet, a second inlet, a first outlet and a second outlet, from the top And down, the second inlet, the first outlet and the second outlet are arranged in sequence; The device for separating the immiscible liquid also includes: a fan, the fan is connected to the switching unit; a switching unit, the switching unit has a first port, a second port, a third port and a fourth port; the first port selectively communicates with the second port and the fourth port, and the third port selectively communicates The second port and the fourth port; the input end of the fan communicates with the fourth port, and the output end communicates with the second port; the first port communicates with the outside world, and the third port communicates with the second inlet; a buoyancy piece, the buoyancy piece blocks the second inlet when it rises in the container, and opens the second inlet when it falls; a guide rail, the buoyant member moves up and down along the guide rail as the liquid level in the container changes; a valve that controls the opening and closing of the first inlet: when the first port is in communication with the fourth port, and the second port is in communication with the third port, the first inlet is closed; when the first port is in communication When communicating with the second port, and when the third port is communicating with the fourth port, the first inlet is opened. 2. The device for separating immiscible liquids according to claim 1, wherein the first valve comprises: A sealing plate, which is used to block the first inlet, is arranged in the container, and one end of the sealing plate is connected to the container. 3 . The device for separating immiscible liquids according to claim 2 , wherein the part of the sealing plate in contact with the first inlet is made of flexible material. 4 . 4 . The device for separating immiscible liquids according to claim 1 , wherein the first inlet is arranged on the top wall of the container. 5 . 5. The device for separating immiscible liquids according to claim 1, wherein the device for separating immiscible liquids further comprises: A separate valve, the separate valve communicates with the first outlet and the second outlet respectively. 6. The device for separating immiscible liquids according to claim 1, wherein the device for separating immiscible liquids further comprises: A filter unit, the inlet of the filter unit is adapted to communicate with waste liquid, and the outlet communicates with the first inlet. 7 . The device for separating immiscible liquids according to claim 1 , characterized in that: from top to bottom, the inner diameter R of the area enclosed by the guide rail remains unchanged or gradually increases, and R≧R ₀ , R ₀ . is the outer diameter of the buoyancy member. 8. The device for separating immiscible liquids according to claim 1, wherein the device for separating immiscible liquids further comprises: A roller, the roller is arranged at the bottom of the container. 9. The device for separating immiscible liquids according to claim 1, wherein the device for separating immiscible liquids further comprises: an observation window, the observation window adopts a material that transmits visible light and is arranged on the side wall of the container. 10 . The device for separating immiscible liquids according to claim 1 , wherein the immiscible liquids are cutting fluids, mold release agents or degreasing agents. 11 .

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