阅读说明：本技术 一种连续化环氧大豆油分水装置及工艺 (Continuous epoxy soybean oil water separating device and process ) 是由 聂勇 吕永波 吴振宇 梁晓江 解庆龙 蔡金金 于 2020-12-17 设计创作，主要内容包括：本发明公开了一种连续化环氧大豆油分水装置及工艺,本发明的装置包括分水罐,分水罐上设有油相出口、物料入口和出水口,出水口通过管路连接有平衡管分水装置；分水罐内部的上端和下端分别设有高压电极板和接地极板,高压电极板通过第一电极杆连接高压电源,接地极板通过第二电极杆连接接地线；高压电极板的高度低于油相出口的高度；平衡管分水装置能在不同的液位高度进行排水,排水的液位高度小于油相出口的高度。相对于传统保温静置分水的方式,本发明的分水装置可实现连续化脱水,分水速率更快,同时也避免了因酸性条件下过夜保温分水而导致产品的色泽加深及环氧键破坏的技术问题,主要用于环氧大豆油环氧化反应结束后酸水脱除和后续水洗分水。(The invention discloses a continuous epoxy soybean oil water separation device and a process, wherein the device comprises a water separation tank, an oil phase outlet, a material inlet and a water outlet are arranged on the water separation tank, and the water outlet is connected with a balance pipe water separation device through a pipeline; the upper end and the lower end in the water diversion tank are respectively provided with a high-voltage electrode plate and a grounding electrode plate, the high-voltage electrode plate is connected with a high-voltage power supply through a first electrode rod, and the grounding electrode plate is connected with a grounding wire through a second electrode rod; the height of the high-voltage electrode plate is lower than that of the oil phase outlet; the balance pipe water diversion device can drain water at different liquid level heights, and the liquid level height of the drained water is smaller than the height of the oil phase outlet. Compared with the traditional heat-preservation standing water diversion mode, the water diversion device disclosed by the invention can realize continuous dehydration, has a higher water diversion rate, and simultaneously avoids the technical problems of deepening of the color of a product and damage to an epoxy bond caused by overnight heat-preservation water diversion under an acidic condition.)

1. A continuous epoxy soybean oil water separation device is characterized by comprising a water separation tank (1), wherein the top of the water separation tank (1) is provided with an air release port (7), an air release valve is arranged at the air release port (7), the upper part, the middle part and the bottom of the water separation tank (1) are respectively provided with an oil phase outlet (4), a material inlet (2) and a water outlet (11), and the water outlet (11) is connected with a balance pipe water separation device (9) through a pipeline; the upper end and the lower end in the water distribution tank (1) are respectively provided with a horizontal high-voltage electrode plate (5) and a horizontal grounding electrode plate (12), the high-voltage electrode plate (5) is connected with a high-voltage power supply through a first electrode rod, and the grounding electrode plate (12) is connected with a grounding wire through a second electrode rod; the height of the high-voltage electrode plate (5) is lower than that of the oil phase outlet (4), so that the oil phase after water is distributed in the water distribution tank (1) can completely immerse the high-voltage electrode plate (5) and then overflow from the oil phase outlet (4); the balance pipe water diversion device (9) can drain water at different liquid level heights, and the liquid level height of the balance pipe water diversion device (9) for draining water is smaller than the height of the oil phase outlet (4); a space interval is formed between the lower surface of the grounding polar plate (12) and the bottom wall of the water diversion tank (1).

2. The continuous epoxy soybean oil water separation device according to claim 1, wherein the balance pipe water separation device (9) comprises a pressure balance pipe in an inverted U-shaped structure, one end of the pressure balance pipe is connected with the water tank, and the other end of the pressure balance pipe is connected with the water outlet (11) at the bottom of the water separation tank (1) through a pipeline; the top of the pressure balance pipe is provided with a vent (8), and a vent valve is arranged at the vent (8);

a plurality of bypass pipes are arranged between the two side pipes of the pressure balance pipe at intervals from top to bottom, and each bypass pipe is provided with a water outlet valve, so that the water diversion device (9) of the pressure balance pipe can drain water at different heights; wherein the height of the highest bypass pipe on the pressure balance pipe is lower than that of the oil phase outlet (4).

3. The continuous epoxy soybean oil water separation device according to claim 1, wherein the high voltage power supply connected to the high voltage electrode plate (5) through the first electrode rod is a positive high voltage direct current power supply, a negative high voltage direct current power supply, a power frequency alternating current power supply or a high voltage pulse power supply.

4. The continuous epoxy soybean oil water separating device according to claim 1, wherein the high voltage electrode plate (5) and the ground electrode plate (12) are both flat plate structures, the flat plates are rectangular or circular, and a plurality of small circular holes are uniformly formed on the flat plates; the water diversion tank (1) is in a horizontal cuboid structure or a horizontal cylinder structure; wherein, the oil phase outlet (4), the material inlet (2) and the water outlet (11) of the water distribution tank (1) are all provided with control valves.

5. The continuous soybean oil epoxy water separating device according to claim 1, wherein a horizontal pipe discharging distributor (10) is arranged inside the water separating tank (1), and the inlet end of the pipe discharging distributor (10) is connected with the material inlet (2) of the water separating tank (1); the calandria distributor (10) is arranged between the high-voltage electrode plate (5) and the grounding electrode plate (12) at intervals.

6. The continuous epoxy soybean oil water separation device according to claim 1, wherein the lower end of the first electrode rod is fixedly connected with the upper surface of the high-voltage electrode plate (5), the upper end of the first electrode rod penetrates out of the top of the water separation tank (1) and is connected with a high-voltage power supply, an insulating support ring (6) is sleeved on the outer side of the middle part of the first electrode rod, and the outer side of the middle part of the first electrode rod is fixedly connected with the top of the water separation tank (1) in a sealing manner through the insulating support ring (6); the ground pole plate (12) lower surface is through insulating bracing piece and water distribution tank (1) diapire fixed connection, second electrode pole upper end and ground pole plate (12) lower surface fixed connection, second electrode pole lower extreme are worn out and are connected with the earth connection from water distribution tank (1) bottom, the outside at second electrode pole middle part and water distribution tank (1) bottom sealing fixed connection.

7. The process of claim 1, wherein the process comprises the following steps:

1) a control valve at a water outlet (11) at the bottom of the water distribution tank (1) is closed firstly; preheating the water-containing epoxy soybean oil emulsion, introducing the preheated epoxy soybean oil emulsion into a water distribution tank (1) through a material inlet (2), discharging the epoxy soybean oil emulsion through a calandria distributor (10), uniformly distributing the epoxy soybean oil emulsion in the water distribution tank (1), stopping introducing the epoxy soybean oil emulsion into the water distribution tank (1) after a high-voltage electrode plate (5) is completely immersed by the epoxy soybean oil emulsion, and starting a high-voltage power supply connected with the high-voltage electrode plate (5) to perform electrostatic water distribution so that water in the epoxy soybean oil emulsion is quickly settled to the bottom of the water distribution tank (1) under the action of high-voltage static electricity;

2) after an obvious water layer appears at the bottom of the water distribution tank (1), control valves at an oil phase outlet (4), a material inlet (2) and a water outlet (11) of the water distribution tank (1) are all opened to begin to discharge settled water outwards, preheated epoxy soybean oil emulsion is continuously introduced into the water distribution tank (1) through the material inlet (2) to keep a high-voltage electrode plate (5) completely immersed by the oil phase all the time, the oil phase after water distribution overflows outwards from the oil phase outlet (4), the settled water is discharged from the water outlet (11) and flows to a balance pipe water distribution device (9), and the balance pipe water distribution device (9) controls the liquid level height for water discharge to adjust the oil-water interface position in the water distribution tank (1) during electrostatic water distribution, so that the continuous water distribution and water discharge processes of the epoxy soybean oil emulsion are realized.

8. The process for continuously preparing the epoxy soybean oil water separating device according to claim 7, wherein an emptying valve at an emptying port (8) of the balance pipe water separating device (9) is opened, and a water outlet valve on a bypass pipe at different height positions on the balance pipe water separating device (9) is opened to control the liquid level height of the balance pipe water separating device (9) for water discharging, so that the position of an oil-water interface in the water separating tank (1) for electrostatic water separating is adjusted to be at the lower side of the grounding polar plate (12).

9. The process of claim 7, wherein the water content of the epoxy soybean oil emulsion is 5% to 30%, and the residence time of the epoxy soybean oil emulsion in the water separator is 5 to 10min when the high-voltage electrostatic continuous water separation is performed.

10. The process of claim 7, wherein the electric field strength is controlled to be 25kV/m-150kV/m when performing electrostatic water separation.

Technical Field

The invention relates to a continuous epoxy soybean oil water separating device and a process.

Background

Epoxidized soybean oil is a green and environment-friendly plasticizer with excellent performance, and is widely applied to the plastic processing industry, particularly the production of polyvinyl chloride (PVC). With the enhancement of environmental awareness and the attention of people on safety, the application range and the consumption of the epoxidized soybean oil are further increased. Compared with the domestic products, the epoxidized soybean oil produced at present still has the problems of low epoxy value, dark color, poor thermal stability and the like.

The production process of epoxidized soybean oil mainly comprises the following steps: the method comprises the following steps of reaction, sedimentation water diversion, washing, sedimentation water diversion and flash evaporation, wherein an epoxy soybean oil dehydration device is mainly focused on the flash evaporation step with less water content, for example, Chinese patent 201410800862.2 and Chinese patent 201920704422.5 disclose epoxy soybean oil dehydration devices, while for the water diversion process in the treatment process, the patents are few, the process is usually long-time heat-preservation standing water diversion, for example, CN201510598712.2 epoxy soybean oil production process, the water diversion tank used in the process has large occupied area, intermittent operation is not beneficial to improving the productivity, the water diversion time is long, formic acid and other substances remained in the crude epoxy soybean oil product can cause ring-opening reaction, polymerization and other reactions of the epoxy soybean oil under the high-temperature acidic condition, the epoxy value and the iodine value of the product are reduced, and the viscosity of the product is increased to be not beneficial to subsequent separation. In addition, the color of the product is deepened by long-time heating, which is not beneficial to improving the quality of the product. Therefore, the epoxy soybean oil water diversion device with high water diversion efficiency is designed, and has positive effects of improving the product quality and increasing the economic benefit.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a novel water separation device and a novel water separation process, which can shorten the water separation time of epoxidized soybean oil and can continuously separate water.

The continuous epoxy soybean oil water separation device is characterized by comprising a water separation tank, wherein the top of the water separation tank is provided with an air release port, the air release port is provided with an air release valve, the upper part, the middle part and the bottom of the water separation tank are respectively provided with an oil phase outlet, a material inlet and a water outlet, and the water outlet is connected with a balance pipe water separation device through a pipeline; the upper end and the lower end of the interior of the water diversion tank are respectively provided with a horizontal high-voltage electrode plate and a horizontal grounding electrode plate, the high-voltage electrode plate is connected with a high-voltage power supply through a first electrode rod, and the grounding electrode plate is connected with a grounding wire through a second electrode rod; the height of the high-voltage electrode plate is lower than that of the oil phase outlet, so that the oil phase after water is distributed in the water distribution tank completely submerges the high-voltage electrode plate and then overflows from the oil phase outlet; the balance pipe water diversion device can drain water at different liquid level heights, and the liquid level height of the balance pipe water diversion device for draining water is smaller than the height of the oil phase outlet; a space interval is formed between the lower surface of the grounding polar plate and the bottom wall of the water distribution tank.

The continuous epoxy soybean oil water separation device is characterized in that the balance pipe water separation device comprises a pressure balance pipe in an inverted U-shaped structure, one end of the pressure balance pipe is connected with a water tank, and the other end of the pressure balance pipe is connected with a water outlet at the bottom of the water separation tank through a pipeline; the top of the pressure balance pipe is provided with an emptying port, and an emptying valve is arranged at the emptying port;

a plurality of bypass pipes are arranged between the two side pipes of the pressure balance pipe at intervals from top to bottom, and each bypass pipe is provided with a water outlet valve, so that the water diversion device of the pressure balance pipe can drain water at different heights; wherein the height of the highest bypass pipe on the pressure balance pipe is lower than that of the oil phase outlet.

The continuous epoxy soybean oil water separation device is characterized in that a high-voltage power supply connected with the high-voltage electrode plate through the first electrode rod is a positive high-voltage direct-current power supply, a negative high-voltage direct-current power supply, a power frequency alternating-current power supply or a high-voltage pulse power supply.

The continuous epoxy soybean oil water separating device is characterized in that the high-voltage electrode plate and the grounding electrode plate are both of flat plate structures, the flat plates are rectangular or circular, and a plurality of small round holes are uniformly formed in the flat plates; the water diversion tank is in a horizontal cuboid structure or a horizontal cylinder structure; wherein, the oil phase outlet, the material inlet and the water outlet of the water diversion tank are all provided with control valves.

The continuous epoxy soybean oil water separating device is characterized in that a horizontal calandria distributor is arranged in the water separating tank, and the inlet end of the calandria distributor is connected with the material inlet of the water separating tank; the calandria distributor is arranged between the high-voltage electrode plate and the grounding electrode plate at intervals.

The continuous epoxy soybean oil water separation device is characterized in that the lower end of a first electrode rod is fixedly connected with the upper surface of a high-voltage electrode plate, the upper end of the first electrode rod penetrates out of the top of a water separation tank and is connected with a high-voltage power supply, an insulating support ring is sleeved on the outer side of the middle part of the first electrode rod, and the outer side of the middle part of the first electrode rod is fixedly connected with the top of the water separation tank in a sealing manner through the insulating support ring; the ground pole plate lower surface passes through insulating bracing piece and water distribution tank diapire fixed connection, second electrode pole upper end and ground pole plate lower surface fixed connection, second electrode pole lower extreme are worn out and are connected with the earth connection from water distribution tank bottom, the outside at second electrode pole middle part and the sealed fixed connection in water distribution tank bottom.

The process of the continuous epoxy soybean oil water separating device is characterized by comprising the following steps of:

1) the control valve at the water outlet at the bottom of the water diversion tank is closed firstly; preheating the water-containing epoxy soybean oil emulsion, introducing the preheated epoxy soybean oil emulsion into a water diversion tank through a material inlet, discharging the epoxy soybean oil emulsion through a calandria distributor, uniformly distributing the epoxy soybean oil emulsion in the water diversion tank, stopping introducing the epoxy soybean oil emulsion into the water diversion tank after a high-voltage electrode plate is completely immersed by the epoxy soybean oil emulsion, and starting a high-voltage power supply connected with the high-voltage electrode plate to perform electrostatic water diversion so that water in the epoxy soybean oil emulsion is quickly settled to the bottom of the water diversion tank under the action of high-voltage static electricity;

2) after an obvious water layer appears at the bottom of the water diversion tank, control valves at an oil phase outlet, a material inlet and a water outlet of the water diversion tank are all opened to start discharging settled water outwards, preheated epoxy soybean oil emulsion is continuously introduced into the water diversion tank through the material inlet to keep the high-voltage electrode plate to be completely immersed by the oil phase all the time, the oil phase after water diversion overflows outwards from the oil phase outlet, the settled water is discharged from the water outlet and flows to a balance pipe water diversion device, the balance pipe water diversion device controls the liquid level height for water drainage to adjust the oil-water interface position during electrostatic water diversion in the water diversion tank, and therefore the continuous water diversion and drainage processes of the epoxy soybean oil emulsion are realized.

The process for the continuous epoxy soybean oil water separation device is characterized in that a vent valve at a vent of the balance pipe water separation device is opened, and the water outlet valves on bypass pipes at different height positions on the balance pipe water separation device are opened to control the liquid level height of the balance pipe water separation device for water drainage, so that the oil-water interface position of the water separation tank for electrostatic water separation is adjusted to be at the lower side of the grounding polar plate.

The process of the continuous epoxy soybean oil water separating device is characterized in that the water content of the epoxy soybean oil emulsion is 5-30%, and the retention time of the epoxy soybean oil emulsion in the water separating device is 5-10min when high-voltage electrostatic continuous water separation is carried out.

The process of the continuous epoxy soybean oil water separation device is characterized in that the electric field intensity is controlled to be 25kV/m-150kV/m during electrostatic water separation.

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

1) in the process of water separation of the water-containing epoxy soybean oil emulsion, compared with the traditional heat-preservation standing water separation mode, the water separation device can realize continuous dehydration; compared with the traditional overnight standing, heat preservation and water diversion mode, the method has the advantages that the water diversion speed is high, the water diversion time of the epoxidized soybean oil can be greatly shortened, and the water diversion process can be realized within 5-10 min;

2) compared with a heat-preservation standing water distribution tank, the water distribution device has the advantages of small equipment volume, small occupied area and the like; in the water diversion device, the combination of the horizontal high-voltage electrode plate, the horizontal grounding electrode plate and the horizontal calandria distributor is adopted, so that the uniform distribution of materials in the water diversion tank can be realized, and the uniformity and the stability of an electric field can be kept.

3) When the water diversion device is used for diverting water from the epoxy soybean oil emulsion, the retention time of materials in the water diversion tank is short, the process has the advantage of rapid water diversion, and the problems that the epoxy soybean oil product has ring-opening reaction and the epoxy value of the product is reduced due to long-time heat preservation and stratification can be effectively reduced. Meanwhile, the technical problems of deepening the color of the product and damaging epoxy bonds caused by overnight heat preservation and water diversion under the acidic condition are also avoided, and the method is mainly used for removing acid water and distributing water in subsequent water washing after the epoxy soybean oil epoxidation reaction is finished.

4) In the water distribution device, the water outlet at the bottom of the water distribution tank is connected with the balance pipe water distribution device through a pipeline, and the balance pipe water distribution device can keep the interface of oil and water phases at the lower side of the grounding polar plate according to the difference of the height of the opened water outlet valve, so that the electric field in the dehydration process is kept stable.

Drawings

FIG. 1 is a schematic structural view of a water diversion apparatus of the present invention;

FIG. 2 is a schematic diagram of the results of regulating and controlling the oil-water interface in the water diversion tank by using the water diversion device in examples 8-9;

in the figure: 1-a water separation tank, 2-a material inlet, 3-an oil phase overflow tank, 4-an oil phase outlet, 5-a high-voltage electrode plate, 6-an insulating support ring, 7-an air release port, 8-an air release port, 9-a balance pipe water separation device, 10-a calandria distributor, 11-a water outlet and 12-a grounding electrode plate.

Detailed Description

The present invention is further illustrated by the following examples, which should not be construed as limiting the scope of the invention.

Example (b): compare FIG. 1

A continuous epoxy soybean oil water separation device comprises a water separation tank 1, wherein the top of the water separation tank 1 is provided with an air release port 7, an air release valve is arranged at the air release port 7, the upper part, the middle part and the bottom of the water separation tank 1 are respectively provided with an oil phase outlet 4, a material inlet 2 and a water outlet 11, and the water outlet 11 is connected with a balance pipe water separation device 9 through a pipeline; the upper end and the lower end of the inside of the water distribution tank 1 are respectively provided with a horizontal high-voltage electrode plate 5 and a horizontal grounding electrode plate 12, the high-voltage electrode plate 5 is connected with a high-voltage power supply through a first electrode rod, and the grounding electrode plate 12 is connected with a grounding wire through a second electrode rod; the height of the high-voltage electrode plate 5 is lower than that of the oil phase outlet 4, so that the oil phase after water is distributed in the water distribution tank 1 can completely submerge the high-voltage electrode plate 5 and then overflow from the oil phase outlet 4; the balance pipe water diversion device 9 can drain water at different liquid level heights, and the liquid level height of the balance pipe water diversion device 9 for draining water is smaller than the height of the oil phase outlet 4; a space interval is reserved between the lower surface of the grounding polar plate 12 and the bottom wall of the water diversion tank 1.

In the comparison of fig. 1, the balance pipe water diversion device 9 comprises a pressure balance pipe in an inverted U-shaped structure, one end of the pressure balance pipe is connected with the water tank, and the other end of the pressure balance pipe is connected with the water outlet 11 at the bottom of the water diversion tank 1 through a pipeline; the top of the pressure balance pipe is provided with a vent 8 and a vent valve is arranged at the vent 8. A plurality of bypass pipes are arranged between the two side pipes of the pressure balance pipe at intervals from top to bottom, and each bypass pipe is provided with an outlet valve for discharging water outwards, so that the water distribution device 9 of the pressure balance pipe can discharge water at different heights; wherein the height of the highest bypass pipe on the pressure balance pipe is lower than that of the oil phase outlet 4.

In the present application, the high voltage power supply connected to the high voltage electrode plate 5 through the first electrode rod is a positive high voltage dc power supply, a negative high voltage dc power supply, a power frequency ac power supply or a high voltage pulse power supply.

The high-voltage electrode plate 5 and the grounding electrode plate 12 are both of flat plate structures, the flat plates are rectangular or circular, and a plurality of small circular holes are uniformly formed in the flat plates; the water distribution tank 1 is in a horizontal cuboid structure or a horizontal cylinder structure; wherein, the oil phase outlet 4, the material inlet 2 and the water outlet 11 of the water diversion tank 1 are all provided with control valves.

In order to ensure that the epoxy soybean oil emulsion introduced into the water diversion tank can be uniformly distributed in the water diversion tank, a horizontal calandria distributor 10 is arranged in the water diversion tank 1, and the inlet end of the calandria distributor 10 is connected with the material inlet 2 of the water diversion tank 1; the calandria distributor 10 is arranged between the high-voltage electrode plate 5 and the grounding electrode plate 12 at intervals.

The lower end of the first electrode rod is fixedly connected with the upper surface of a high-voltage electrode plate 5, the upper end of the first electrode rod penetrates out of the top of the water distribution tank 1 and is connected with a high-voltage power supply, an insulating support ring 6 is sleeved on the outer side of the middle part of the first electrode rod, and the outer side of the middle part of the first electrode rod is fixedly connected with the top of the water distribution tank 1 in a sealing mode through the insulating support ring 6; the lower surface of the grounding polar plate 12 is fixedly connected with the bottom wall of the water distribution tank 1 through an insulating support rod, the upper end of the second electrode rod is fixedly connected with the lower surface of the grounding polar plate 12, the lower end of the second electrode rod penetrates out of the bottom of the water distribution tank 1 and is connected with a grounding wire, and the outer side of the middle part of the second electrode rod is fixedly connected with the bottom of the water distribution tank 1 in a sealing manner.

Referring to fig. 1, an oil phase overflow tank 3 is disposed at an upper end of one side of an interior of a water diversion tank 1, the oil phase overflow tank 3 is disposed near a lower portion of an oil phase outlet 4, and the oil phase after water diversion enters the oil phase overflow tank 3 and then overflows from the oil phase outlet 4.

In the present application, the electric field strength between the high voltage electrode plate 5 and the ground electrode plate 12 can be changed by changing the height of the high voltage electrode 5. The electric field strength between the high-voltage electrode plate 5 and the ground electrode plate 12 can also be adjusted by changing the input voltage value of the high-voltage power supply connected to the high-voltage electrode plate 5.

According to the water diversion device, under the action of opening the emptying valve at the emptying port 8 of the balance pipe water diversion device 9, the water outlet valves on bypass pipes at different height positions on the balance pipe water diversion device 9 are opened to control the liquid level height of water drained by the balance pipe water diversion device 9, so that the position of an oil-water interface when electrostatic water diversion is carried out in the water diversion tank 1 is adjusted to be positioned on the lower side of the grounding polar plate 12.

In each of the following examples 1 to 8, the epoxidized soybean oil was subjected to a continuous water-splitting operation using a water-splitting apparatus shown in FIG. 1.

Example 1:

the water diversion process for epoxidized soybean oil by adopting the water diversion device shown in figure 1 comprises the following steps:

the control valve at the water outlet at the bottom of the water diversion tank is closed first. Heating the water separation tank to 50 ℃, preheating the epoxy soybean oil emulsion with the water content of 20% to 50 ℃, introducing the epoxy soybean oil emulsion into the water separation tank through a material inlet at a feeding rate of 1.38 m/h, discharging the epoxy soybean oil emulsion through a discharge pipe type distributor, uniformly distributing the epoxy soybean oil emulsion in the water separation tank, and closing feeding after the high-pressure electrode plate is immersed by the emulsion. And simultaneously starting a high-voltage power supply, wherein the power supply is a positive high-voltage direct-current power supply, regulating the power supply voltage to a certain electric field intensity, performing electrostatic pre-water separation, and after the power supply is started for 5 min, the interface between the water phase and the oil phase in the water separation tank is clear.

And then, control valves at an oil phase outlet, a material inlet and a water outlet of the water separation tank are all opened, and settled water begins to be discharged outwards. The oil phase after water diversion overflows outwards from the oil phase outlet, the settled water flows to the balance pipe water diversion device, the water outlet speed is controlled by the balance pipe water diversion device, the water phase liquid level in the water diversion tank is kept stable, and the water phase liquid level is controlled to be at the lower side of the grounding polar plate. And meanwhile, continuously feeding the materials into the water diversion tank through the material inlet at the feeding speed of 1.38 m/h, and carrying out continuous water diversion. After the operation process is carried out for 20 min and is stable, sampling detection analysis is immediately carried out on the oil phase overflowing outwards through the oil phase outlet, and the experimental result is as follows:

when the voltage operating parameters of the above operation process are: the electric field intensity is 25kV/m, 50kV/m, 75 kV/m, 100 kV/m, 125 kV/m and 150kV/m, and the corresponding stable input power is 100W, 300W, 450W, 800W, 1250W and 1800W respectively.

Under the condition that the stable input power in the water diversion process is respectively 100W, 300W, 450W, 800W, 1250W and 1800W, the water content of the epoxy soybean oil after water diversion is respectively measured, the calculated dehydration rate is respectively 68.7%, 76.2%, 84.5%, 88.5%, 89.3% and 90.3%, and the water content of the oil phase is respectively 6.26%, 4.76%, 3.1%, 2.3%, 2.1% and 1.94%.

Example 2:

the water diversion process for epoxidized soybean oil by adopting the water diversion device shown in figure 1 comprises the following steps:

the control valve at the water outlet at the bottom of the water diversion tank is closed first. Preheating the epoxy soybean oil emulsion with the water content of 20%, introducing the preheated epoxy soybean oil emulsion into a water distribution tank through a material inlet at a feeding rate of 1.38 m/h, discharging the epoxy soybean oil emulsion through a calandria distributor, uniformly distributing the epoxy soybean oil emulsion in the water distribution tank, and closing feeding after the high-pressure electrode plate is immersed in the epoxy soybean oil emulsion. And simultaneously starting a high-voltage power supply, wherein the power supply is a positive high-voltage direct-current power supply, regulating the power supply voltage to the electric field intensity of 100 kV/m, performing electrostatic pre-water separation, and after the power supply is started for 5 min, the interface between the water phase and the oil phase in the water separation tank is clear.

And then, control valves at an oil phase outlet, a material inlet and a water outlet of the water separation tank are all opened, and settled water begins to be discharged outwards. The oil phase after water diversion overflows outwards from the oil phase outlet, the settled water flows to the balance pipe water diversion device, the water outlet speed is controlled by the balance pipe water diversion device, the water phase liquid level in the water diversion tank is kept stable, and the water phase liquid level is controlled to be at the lower side of the grounding polar plate. And meanwhile, continuously feeding the materials into the water diversion tank through the material inlet at the feeding speed of 1.38 m/h, and carrying out continuous water diversion. After the operation process is carried out for 20 min and is stable, sampling detection analysis is immediately carried out on the oil phase overflowing outwards through the oil phase outlet, and the experimental result is as follows:

when the temperatures in the above operation processes are respectively 50 ℃, 60 ℃, 70 ℃ and 80 ℃, the water content of the epoxidized soybean oil after water separation is respectively measured, the calculated dehydration rates are respectively 88.5%, 89.1%, 90.5% and 91%, and the water content of the oil phase is respectively 2.3%, 2.18%, 1.9% and 1.8%.

Example 3:

the water diversion process for epoxidized soybean oil by adopting the water diversion device shown in figure 1 comprises the following steps:

the control valve at the water outlet at the bottom of the water diversion tank is closed first. Heating the water diversion tank to 50 ℃, preheating the epoxy soybean oil emulsion with the water content of 20% to 50 ℃, introducing the epoxy soybean oil emulsion into the water diversion tank through a material inlet, discharging the epoxy soybean oil emulsion through a calandria distributor, uniformly distributing the epoxy soybean oil emulsion in the water diversion tank, and closing feeding after the high-pressure electrode plate is immersed in the epoxy soybean oil emulsion. And simultaneously starting a high-voltage power supply, wherein the power supply is a positive high-voltage direct-current power supply, regulating the power supply voltage to the electric field intensity of 100 kV/m, performing electrostatic pre-water separation, and after the power supply is started for 5 min, the interface between the water phase and the oil phase in the water separation tank is clear.

And then, control valves at an oil phase outlet, a material inlet and a water outlet of the water separation tank are all opened, and settled water begins to be discharged outwards. The oil phase after water diversion overflows outwards from the oil phase outlet, the settled water flows to the balance pipe water diversion device, the water outlet speed is controlled by the balance pipe water diversion device, the water phase liquid level in the water diversion tank is kept stable, and the water phase liquid level is controlled to be at the lower side of the grounding polar plate. Meanwhile, the materials are continuously fed into the water diversion tank through the material inlet, the feeding speed is adjusted, and continuous water diversion is carried out. After the operation process is carried out for 20 min and is stable, sampling detection analysis is immediately carried out on the oil phase overflowing outwards through the oil phase outlet, and the experimental result is as follows:

when the feeding rates of the epoxy soybean oil emulsion in the operation process are respectively 0.276, 0.69, 1.38, 1.71, 2.07 and 3.45 m/h, the water content of the epoxy soybean oil after water separation is respectively measured, the dehydration rates are respectively calculated to be 91.1%, 89.9%, 88.5%, 85.5%, 79.9% and 73%, and the water content of the oil phase is respectively 1.78%, 2.02%, 2.3%, 2.9%, 4.02% and 5.45%.

Example 4:

the water diversion process for epoxidized soybean oil by adopting the water diversion device shown in figure 1 comprises the following steps:

the control valve at the water outlet at the bottom of the water diversion tank is closed first. Heating the water separation tank to 50 ℃, preheating the epoxy soybean oil emulsion with the water content of 20% to 50 ℃, introducing the epoxy soybean oil emulsion into the water separation tank through a material inlet at a feeding rate of 1.38 m/h, discharging the epoxy soybean oil emulsion through a discharge pipe type distributor, uniformly distributing the epoxy soybean oil emulsion in the water separation tank, and closing feeding after the high-pressure electrode plate is immersed by the emulsion. And simultaneously starting a high-voltage power supply, adjusting the power supply voltage to the electric field intensity of 100 kV/m, performing electrostatic pre-water separation, and after the power supply is started for 5 min, defining a clear water phase and oil phase interface in the water separation tank.

And then, control valves at an oil phase outlet, a material inlet and a water outlet of the water separation tank are all opened, and settled water begins to be discharged outwards. The oil phase after water diversion overflows outwards from the oil phase outlet, the settled water flows to the balance pipe water diversion device, the water outlet speed is controlled by the balance pipe water diversion device, the water phase liquid level in the water diversion tank is kept stable, and the water phase liquid level is controlled to be at the lower side of the grounding polar plate. And meanwhile, continuously feeding the materials into the water diversion tank through the material inlet at the feeding speed of 1.38 m/h, and carrying out continuous water diversion. After the operation process is carried out for 20 min and is stable, sampling detection analysis is immediately carried out on the oil phase overflowing outwards through the oil phase outlet, and the experimental result is as follows:

when the power types in the operation process are respectively a positive high-voltage direct-current power supply and a negative high-voltage direct-current power supply, the water content of the epoxidized soybean oil after water diversion is respectively measured, the dehydration rates are respectively 88.5% and 87.3%, and the water content of the oil phase is respectively 2.3% and 2.54%.

Example 5:

and adding formic acid into the epoxy soybean oil emulsion with the water content of 20% to adjust the pH =2, wherein the initial epoxy value of the epoxy soybean oil in the emulsion is 6.4.

Keeping the temperature of the epoxy soybean oil emulsion with the water content of 20% and the pH =2 at 70 ℃, standing for water separation for 15 h, taking the upper oil phase for detection and analysis, wherein the analysis result is as follows: the dehydration rate of the oil phase was 89.5%, the water content was 2.1%, and the epoxy value of epoxidized soybean oil in the oil phase was 6.35.

The epoxy soybean oil emulsion with the water content of 20% and the pH =2 is subjected to a water distribution process by using a water distribution device shown in figure 1 as follows:

the control valve at the water outlet at the bottom of the water diversion tank is closed first. Heating the water separation tank to 70 ℃, preheating the epoxy soybean oil emulsion with the water content of 20% and the pH =2 to 70 ℃, introducing the epoxy soybean oil emulsion into the water separation tank through a material inlet at a feeding rate of 1.38 m/h, discharging the epoxy soybean oil emulsion through a calandria distributor, uniformly distributing the epoxy soybean oil emulsion in the water separation tank, and closing feeding after the high-pressure electrode plate is immersed in the emulsion. And simultaneously starting a high-voltage power supply, wherein the power supply is a positive high-voltage direct-current power supply, regulating the power supply voltage to the electric field intensity of 100 kV/m, performing electrostatic pre-water separation, and after the power supply is started for 5 min, the interface between the water phase and the oil phase in the water separation tank is clear.

And then, control valves at an oil phase outlet, a material inlet and a water outlet of the water separation tank are all opened, and settled water begins to be discharged outwards. The oil phase after water diversion overflows outwards from the oil phase outlet, the settled water flows to the balance pipe water diversion device, the water outlet speed is controlled by the balance pipe water diversion device, the water phase liquid level in the water diversion tank is kept stable, and the water phase liquid level is controlled to be at the lower side of the grounding polar plate. And meanwhile, continuously feeding the materials into the water diversion tank through the material inlet at the feeding speed of 1.38 m/h, and carrying out continuous water diversion. After the operation process is carried out for 20 min and is stable, sampling detection analysis is immediately carried out on the oil phase overflowing outwards through the oil phase outlet, and the experimental result is as follows: the water content of the epoxidized soybean oil after water diversion is measured, and the dehydration rate is calculated to be 90.5 percent, the water content of the oil phase is calculated to be 1.9 percent, and the epoxy value of the epoxidized soybean oil in the oil phase is 6.4.

Example 6:

example 1 was repeated using the water diversion apparatus shown in fig. 1 to perform the water diversion process of epoxidized soybean oil, except for the following two points:

1. example 6 the voltage operating parameters for the operating procedure were: the input electric field intensity is 100 kV/m;

2. the epoxy soybean oil emulsion to be treated is also pretreated in the operation process of example 6, and the pretreatment process of the epoxy soybean oil emulsion in example 6 is to add sodium formate to the epoxy soybean oil emulsion with the water content of 20% so that the concentration of sodium formate in the final emulsion is 0.3 mol/L.

Example 6 the procedure for carrying out the water diversion operation was as follows:

the control valve at the water outlet at the bottom of the water diversion tank is closed first. Heating the water separation tank to 50 ℃, preheating the epoxy soybean oil emulsion with sodium formate concentration of 0.3 mol/L and water content of 20% to 50 ℃, introducing the epoxy soybean oil emulsion into the water separation tank through a material inlet at a feeding rate of 1.38 m/h, discharging the epoxy soybean oil emulsion through a calandria distributor, uniformly distributing the epoxy soybean oil emulsion in the water separation tank, and closing feeding after the high-pressure electrode plate is immersed in the epoxy soybean oil emulsion. And simultaneously starting a high-voltage power supply, wherein the power supply is a positive high-voltage direct-current power supply, regulating the power supply voltage to 100 kV/m, performing electrostatic pre-water separation, and after the power supply is started for 5 min, the interface between the water phase and the oil phase in the water separation tank is clear.

And then, control valves at an oil phase outlet, a material inlet and a water outlet of the water separation tank are all opened, and settled water begins to be discharged outwards. The oil phase after water diversion overflows outwards from the oil phase outlet, the settled water flows to the balance pipe water diversion device, the water outlet speed is controlled by the balance pipe water diversion device, the water phase liquid level in the water diversion tank is kept stable, and the water phase liquid level is controlled to be at the lower side of the grounding polar plate. And meanwhile, continuously feeding the materials into the water diversion tank through the material inlet at the feeding speed of 1.38 m/h, and carrying out continuous water diversion. After the operation process is carried out for 20 min and is stable, sampling detection analysis is immediately carried out on the oil phase overflowing outwards through the oil phase outlet, and the experimental result is as follows: the water content of the epoxidized soybean oil after water diversion is measured, and the calculated dehydration rate is 89.3 percent and the oil phase water content is 2.14 percent.

Example 7:

the procedure of example 1 was repeated using the water diversion apparatus shown in FIG. 1 to conduct the water diversion process of epoxidized soybean oil except that "example 7 was conducted using the epoxidized soybean oil emulsions having different water contents, the electric field strength was fixed at 100 kV/m during the operation of example 7, and the rest of the process was the same as that of example 1.

When the water contents of the epoxidized soybean oil emulsions used in example 7 were treated at 5%, 10%, 15%, 20% and 30%, respectively, the dehydration rates were measured to be 48.2%, 73.2%, 80.3%, 88.5% and 91.6%, respectively, and the oil phase water contents were measured to be 2.59%, 2.68%, 3%, 2.3% and 2.52%, respectively.

Example 8:

referring to fig. 2, the water diversion process of epoxidized soybean oil is carried out as follows:

the control valve at the water outlet at the bottom of the water diversion tank is closed first. Heating the water separation tank to 50 ℃, preheating the epoxy soybean oil emulsion with the water content of 30% to 50 ℃, introducing the epoxy soybean oil emulsion into the water separation tank through a material inlet at a feeding rate of 1.38 m/h, discharging the epoxy soybean oil emulsion through a discharge pipe type distributor, uniformly distributing the epoxy soybean oil emulsion in the water separation tank, and closing feeding after the high-pressure electrode plate is immersed by the emulsion. And simultaneously starting a high-voltage power supply, wherein the power supply is a positive high-voltage direct-current power supply, regulating the power supply voltage to the electric field intensity of 100 kV/m, performing electrostatic pre-water separation, and after the power supply is started for 5 min, the interface between the water phase and the oil phase in the water separation tank is clear.

And then, control valves at an oil phase outlet, a material inlet and a water outlet of the water separation tank are all opened, and settled water begins to be discharged outwards. The oil phase after water diversion overflows outwards from the oil phase outlet, the settled water flows to the balance pipe water diversion device, the water outlet speed is controlled by the balance pipe water diversion device, the water phase liquid level in the water diversion tank is kept stable, and the water phase liquid level is controlled to be at the lower side of the grounding polar plate. And meanwhile, continuously feeding the materials into the water diversion tank through the material inlet at the feeding speed of 1.38 m/h, and carrying out continuous water diversion.

In the operation process, the balance pipe water distribution device controls the water outlet height to be h₃The height between the oil phase interface and the water phase interface in the water diversion tank is h₁The height of the water phase interface in the water diversion tank is h₂Density of epoxidized soybean oil is ρ₁Density of water is rho₂According to the formula rho for the static pressure difference₁h₁g+ρ₂h₂g=ρ₂h₃g, can be controlled by h₃To achieve a water and water phase interface h₂So that the oil-water interface is always kept under the grounding electrode plate. In example 8, h₂Height of 0.3 m, h₁Height of 0.7 m, controlled h₃The height was 0.986 m.

After the operation process is carried out for 20 min and is stable, sampling detection analysis is immediately carried out on the oil phase overflowing outwards through the oil phase outlet, and the experimental result is as follows: after the epoxy soybean oil emulsion with the water content of 30% is subjected to water separation, the dehydration rate is 91.6%, and the water content of the oil phase is 2.52%.

Example 9:

referring to fig. 2, the water diversion process of epoxidized soybean oil is carried out as follows:

the control valve at the water outlet at the bottom of the water diversion tank is closed first. Heating the water separation tank to 50 ℃, preheating the epoxy soybean oil emulsion with the water content of 30% to 50 ℃, introducing the epoxy soybean oil emulsion into the water separation tank through a material inlet at a feeding rate of 1.38 m/h, discharging the epoxy soybean oil emulsion through a discharge pipe type distributor, uniformly distributing the epoxy soybean oil emulsion in the water separation tank, and closing feeding after the high-pressure electrode plate is immersed by the emulsion. And simultaneously starting a high-voltage power supply, wherein the power supply is a positive high-voltage direct-current power supply, regulating the power supply voltage to the electric field intensity of 100 kV/m, performing electrostatic pre-water separation, and after the power supply is started for 5 min, the interface between the water phase and the oil phase in the water separation tank is clear.

Experiment 1: the delivery port of water diversion tank bottom does not pass through the balanced pipe water diversion apparatus of tube coupling, the control flap of the delivery port department of water diversion tank bottom is directly opened to the experimentation, when outwards discharging water, the water phase interface height control in the water diversion tank is shakiness, the aperture of the control flap of delivery port department is opened and is leaded to water phase liquid level height to be located the ground connection polar plate upside too little, the aperture is too big to lead to oil phase to flow along with the water phase from the bottom delivery port, need constantly adjust the valve opening degree in the experimentation, in order to keep liquid level height big fluctuation of disappearance.

Experiment 2: the delivery port of water diversion tank bottom passes through the balanced pipe water diversion apparatus of tube coupling, and balanced pipe water diversion apparatus control play water rate among the experimentation keeps the aqueous phase liquid level in the water diversion tank to remain stable, controls aqueous phase liquid level promptly and at the downside of ground connection polar plate, and the in-process need not the manual work and operates again.

The statements in this specification merely set forth a list of implementations of the inventive concept and the scope of the present invention should not be construed as limited to the particular forms set forth in the examples.