阅读说明：本技术 不相溶液体的分离方法 (Method for separating immiscible liquids ) 是由 闻路红 伍恒汉 王明琼 王强 谢仪 何跃智 于 2019-09-24 设计创作，主要内容包括：本发明提供了一种不相溶液体的分离方法,包括进液步骤：通过切换单元的切换和风机；封闭的容器内的气体通过第二进口和切换单元被风机抽出,第一进口打开,废液通过第一进口进入容器内,浮力件封堵第二进口；废液中的不相溶的液体在封闭的容器内分离,液体上下分层；排液步骤：所述容器内的密度较小的液体通过第一出口排出；之后,切换单元切换,风机工作；外界气体通过切换单元、风机及第二进口进入封闭的容器内,浮力件脱离第二进口,所述阀关闭第一进口；利用第二出口排出容器内的密度较大的液体,容器内液面下降。本发明具有分离效率高等优点。(The invention provides a separation method of immiscible liquid, which comprises the following liquid feeding steps: switching by a switching unit and a fan; the air in the closed container is pumped out by the fan through the second inlet and the switching unit, the first inlet is opened, the waste liquid enters the container through the first inlet, and the buoyancy piece blocks the second inlet; separating immiscible liquid in the waste liquid in a closed container, and layering the liquid up and down; liquid drainage step: the less dense liquid in the container is discharged through a first outlet; then, the switching unit switches and the fan works; the external air enters the closed container through the switching unit, the fan and the second inlet, the buoyancy piece is separated from the second inlet, and the valve closes the first inlet; the second outlet is used for discharging the liquid with higher density in the container, and the liquid level in the container is lowered. The invention has the advantages of high separation efficiency and the like.)

1. A method for separating immiscible liquids, the method comprising:

a liquid inlet step:

the first port of the switching unit is communicated with the second port, the third port is communicated with the fourth port, the first port is communicated with the outside, and the third port is communicated with the second inlet of the closed container; the input end of the working fan is communicated with the fourth port, and the output end of the working fan is communicated with the second port; the air in the closed container is pumped out by the fan through the second inlet and the switching unit;

the valve opens a first inlet of the closed container, waste liquid enters the container through the first inlet, and a buoyancy piece rises along with the liquid level in the closed container to block a second inlet;

the immiscible liquid in the waste liquid is separated in a closed container, the liquid with lower density floats to the upper layer, and the liquid with higher density sinks to the lower layer;

liquid drainage step:

the less dense liquid in the container is discharged through a first outlet; after that time, the user can use the device,

the first port of the switching unit is communicated with the fourth port, and the third port is communicated with the second port; the input end of the working fan is communicated with the fourth port, and the output end of the working fan is communicated with the second port; the external air enters the closed container through the switching unit, the fan and the second inlet, the buoyancy piece is separated from the second inlet, and the valve closes the first inlet;

the second outlet is used for discharging the liquid with higher density in the container, and the liquid level in the container is lowered.

2. The method for separating immiscible liquids according to claim 1, characterized in that: the buoyancy member moves up and down with the liquid level in the area formed by the guide rail.

3. The method for separating immiscible liquids according to claim 1, characterized in that: the working mode of the valve is as follows:

the valve has a closure plate disposed within the container, and one end of the closure plate is connected to the container to open and close the first inlet by forward and reverse rotation of the closure plate.

4. The method for separating immiscible liquids according to claim 1, characterized in that: the first inlet is arranged on the top wall of the container, and the first inlet, the first outlet and the second outlet are sequentially arranged from top to bottom.

5. The method for separating immiscible liquids according to claim 1, characterized in that: the first outlet and the second outlet are respectively communicated with another valve.

6. The method for separating immiscible liquids according to claim 1, characterized in that: the waste liquid passes through the filtering unit and the first inlet in sequence and enters the closed container.

7. The method for separating immiscible liquids according to claim 1, characterized in that: from top to bottom, the inner diameter R of the area formed by the guide rail is unchanged or gradually increased, and R is more than or equal to R₀，R₀Is the outer diameter of the buoyancy member.

8. The method for separating immiscible liquids according to claim 1, characterized in that: and rollers are arranged at the bottom of the container.

9. The method for separating immiscible liquids according to claim 1, characterized in that: the side wall of the container is provided with an observation window, and the observation window is made of a material which can transmit visible light.

10. The method for separating immiscible liquids according to claim 1, characterized in that: the waste liquid is cutting fluid, release agent or degreasing agent.

Technical Field

The invention relates to liquid separation, in particular to a separation method of immiscible liquid.

Background

The cutting fluid is a metal working fluid used for cooling and lubricating metal in cutting, grinding and other processes. They are of various kinds and complicated in composition, and usually contain a base oil, an emulsifier, a rust preventive, and the like. Cutting fluids (mainly water-based cutting fluids) often have problems of miscellaneous oil, particles and the like in use. The miscellaneous oil is mainly brought by a workpiece or leaked from hydraulic oil and guide rail oil of a machine tool. The traditional machine tool is operated by self-carrying oil-water separation, a steel belt oil remover is used for separating oil from used cutting fluid, but the treatment speed is low and the effect is limited, so that a thick oil layer is suspended on the surface of the liquid, and the performance of the cutting fluid is influenced by breeding microorganisms for a long time.

The release agent is an essential auxiliary material in the die-casting production, in the die-casting production process, in order to prolong the service life of a die cavity and enable the die-casting piece to be smoothly demoulded, the surface of the die-casting piece is smooth and clean, the outline is clear and complete, the release agent is required to be sprayed on the die, a large amount of release agent is sprayed on the die in the die-casting production, part of the release agent is evaporated at high temperature and is adsorbed on the die for consumption, and most of the release agent directly flows into the lower part of the die after being used once to become oil-containing waste liquid, and the oil-containing waste liquid is generally collected.

The degreasing process is a basic process of an automobile coating pretreatment process, and after a white automobile body is welded, a lot of dirty oil including cooling oil, stretch-proofing oil, antirust oil and the like exists on the inner surface, the outer surface and the inner cavity of the automobile body. Problems occur in the degreasing process, which can affect the quality of the electrophoretic paint and further affect the adhesive force and corrosion resistance of the paint film. Along with the increasing of the vehicle passing amount on a production line, the oil content of degreasing fluid is increased, an electrophoresis tank which is not cleaned by dirty oil treatment is polluted, and even a coating workshop stops production and stops working, so that the degreasing tank fluid needs to be taken out for oil-water separation operation.

The purification and reuse treatment of the cutting fluid, the release agent and the degreasing agent can save the production and processing cost on one hand, and can reduce the discharge amount of dangerous wastes on the other hand, thereby realizing green and clean production. The main purpose of the purification and reuse treatment is to separate the mixed oil mixed in the oil, and common oil-water separation methods include a physical separation method and a chemical separation method, wherein the physical method is to remove the oil mixed in the water by the density difference or adsorption and filtration of the oil and the water, and the main methods include a heating separation method, a filtration separation method, an air flotation separation method, an ultrafiltration membrane separation method, a reverse osmosis separation method, a coalescence separation method, a centrifugal separation method and the like; the chemical separation method is to realize demulsification through a demulsifier, and the chemical separation method is not generally adopted because the chemical can influence the components of the liquid to be treated and increase the separation difficulty.

The following are currently common separation methods:

the disadvantages of the above separation methods are:

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

2. the gravity or air flotation separation is based on different oil-water densities or buoyancy, the method is simple, the oil removal effect is stable, but the required time is long;

3. the coalescence separation increases the oil content dispersed in water through the coarse grained material until the buoyancy is larger than the adhesion force to float, the equipment is simple, the investment is low, the service cycle of the coalescence material is long, but the coalescence filler which is not used is selected according to different oil-containing waste liquid, so the adaptability of the method is greatly reduced;

4. by utilizing the selective permeability principle of the hollow fiber membrane, the oil-water separation effect is good, but part of effective components can be removed simultaneously, the cost is high, the investment is large, and the equipment is complex and difficult to operate;

5. the oil in the solution is absorbed by a lipophilic material for filtration and separation, the effluent has good quality, the equipment is miniaturized and is simple to operate, but the equipment investment is high, and the filter bag of the filter material is difficult to regenerate;

6. the centrifugal separation method utilizes centrifugal force generated by rapid rotation to enable water with high density to flow outwards along a circular path, and oil with low density is thrown to an inner ring and gathers into large oil droplets to float and separate, but the daily maintenance is difficult, and the effective components of the liquid to be treated can be damaged.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the separation method of the immiscible liquid, which has good separation effect, automation and accurate separation.

The purpose of the invention is realized by the following technical scheme:

a method for separating immiscible liquids, the method comprising:

a liquid inlet step:

the first port of the switching unit is communicated with the second port, the third port is communicated with the fourth port, the first port is communicated with the outside, and the third port is communicated with the second inlet of the closed container; the input end of the working fan is communicated with the fourth port, and the output end of the working fan is communicated with the second port; the air in the closed container is pumped out by the fan through the second inlet and the switching unit;

the valve opens a first inlet of the closed container, waste liquid enters the container through the first inlet, and a buoyancy piece rises along with the liquid level in the closed container to block a second inlet;

the immiscible liquid in the waste liquid is separated in a closed container, the liquid with lower density floats to the upper layer, and the liquid with higher density sinks to the lower layer;

liquid drainage step:

the less dense liquid in the container is discharged through a first outlet; after that time, the user can use the device,

the first port of the switching unit is communicated with the fourth port, and the third port is communicated with the second port; the input end of the working fan is communicated with the fourth port, and the output end of the working fan is communicated with the second port; the external air enters the closed container through the switching unit, the fan and the second inlet, the buoyancy piece is separated from the second inlet, and the valve closes the first inlet;

the second outlet is used for discharging the liquid with higher density in the container, and the liquid level in the container is lowered.

Compared with the prior art, the invention has the beneficial effects that:

1. the separation is quick and the effect is good;

the combination of the fan and the switching unit is creatively utilized, so that the pressure in the closed container is adjusted according to the requirement:

when the first port of the switching unit is communicated with the second port and the third port is communicated with the fourth port, the second inlet is in an open state, the valve is automatically opened, the waste liquid enters the closed container through the first inlet, immiscible liquid in the waste liquid is quickly separated, the liquid with lower density floats to the upper layer, the liquid with higher density sinks to the lower layer, the immiscible liquid is quickly separated, and the separation effect is good;

2. automation;

the combination of the buoyancy piece and the second inlet is creatively utilized, so that when the first port of the switching unit is communicated with the second port and the third port is communicated with the fourth port, the valve automatically opens the first inlet, the liquid level in the container rises, the buoyancy piece automatically blocks the second inlet along with the rise of the liquid level in the closed container, the second inlet does not need to be manually closed, and automatic control is realized;

in addition, when the first port of the switching unit is communicated with the fourth port and the third port is communicated with the second port, the buoyancy piece is separated from the second inlet, the valve automatically closes the first inlet, the liquid level in the container descends, so that liquid with higher density at the lower layer in the container is discharged, the liquid can be discharged to a higher position (the position higher than the liquid level), the second inlet does not need to be manually opened, and automatic control is realized;

3. the separation is accurate;

observing the rising of the liquid level in the container and the layering effect of the liquid in real time by using an observation window, wherein when the liquid level does not rise any more and the separation of the immiscible liquid is finished, the first outlet is basically positioned at the boundary of the upper layer liquid and the lower layer liquid, and the upper layer liquid above the first outlet in the container is discharged by using the first outlet;

then, the first port of the switching unit is communicated with the fourth port, the third port is communicated with the second port, the buoyancy piece is separated from the second inlet, and the lower-layer liquid is discharged through the second outlet;

4. the multifunctional function is achieved;

the container can be moved by using the roller; utilize the filter unit, realized the filtration to the waste liquid, held back the particulate matter, guaranteed the cleanliness factor of liquid after the separation.

Drawings

The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. As is readily understood by those skilled in the art: these drawings are only for illustrating the technical solutions of the present invention and are not intended to limit the scope of the present invention. In the figure:

fig. 1 is a flow chart of a method of separating immiscible liquids according to an embodiment of the present invention.

Detailed Description

Fig. 1 and the following description depict alternative embodiments of the invention to teach those skilled in the art how to make and reproduce the invention. Some conventional aspects have been simplified or omitted for the purpose of teaching the present invention. Those skilled in the art will appreciate that variations or substitutions from these embodiments will be within the scope of the invention. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the invention. Thus, the present invention is not limited to the following alternative embodiments, but is only limited by the claims and their equivalents.