CN116020178A - Oil-water separation system and method utilizing broadband sound waves to demulsify - Google Patents

Abstract

The invention provides an oil-water separation system utilizing broadband sound waves to demulsify, which comprises a tank body, wherein a broadband sound wave generator for increasing emulsion separation effect is arranged inside or outside the tank body, a filler separation section for re-separation is also arranged inside the tank body, and the filler separation section comprises a first filler separation section arranged at the top of the tank body and a second filler separation section arranged at the bottom of the tank body. According to the invention, the broadband sound wave generator is arranged in the tank body, and the broadband sound wave generator vibrates to separate oil from water of emulsion formed by water and organic matters. By arranging the filler separation section, the oil phase and the water phase are further separated, the water phase can be directly discharged, and the running cost is reduced.

Description

Oil-water separation system and method utilizing broadband sound waves to demulsify

Technical Field

The invention belongs to the technical field of oil-water separation, and particularly relates to an oil-water separation system and method utilizing broadband sound waves to demulsify.

Background

Oil-water separation is a technology for separating oil from water, and at present, there are mainly sedimentation method, centrifugal separation method, air-float method, flocculation method and the like. Under this guidance, the following oil-water separation devices are mainly used in industry:

(1) The mechanism is mainly divided into: a water separator and a water separator;

(2) The separation principle is divided into: the membrane filtration oil-water separator, the oil-water separator which selects lipophilic materials, the unpowered oil-water separator which has different specific gravities and is layered, the demulsification oil-water separator with pharmacological action and the like.

In the prior art, the problems of complex structure, high energy consumption, secondary pollution caused by medicaments and the like exist, and meanwhile, the oil removing effect is limited. The improvement method is to develop new filling materials and new medicaments or design new separation construction and the like, so that the structure of the separation equipment is more and more complex, and the maintenance rate is also greatly improved.

Therefore, an oil-water separation device with simple structure and good oil-water separation effect is needed.

In view of this, the present invention has been made.

Disclosure of Invention

The first object of the invention is to provide an oil-water separation system utilizing broadband sound waves to demulsify, which is characterized in that a broadband sound wave generator is arranged in a tank body, and the broadband sound wave generator vibrates to separate oil from water of emulsion formed by water and organic matters. By arranging the filler separation section, the oil phase and the water phase are further separated, the water phase can be directly discharged, and the running cost is reduced.

The second object of the present invention is to provide an oil-water separation method using broadband acoustic demulsification, which saves cost and operation energy.

In order to achieve the technical purpose, the invention provides the following technical scheme:

the invention provides an oil-water separation system utilizing broadband sound waves to demulsify, which comprises a tank body, wherein a broadband sound wave generator for increasing emulsion separation effect is arranged inside or outside the tank body, a filler separation section for re-separation is also arranged inside the tank body, and the filler separation section comprises a first filler separation section arranged at the top of the tank body and a second filler separation section arranged at the bottom of the tank body.

In the prior art, oil-water separation is accompanied by a little shortage. Firstly, in the reaction process, organic matters and water form emulsion, a simple chromatograph can not break emulsion and efficiently separate an oil-water system, and a packing tower and broadband sonic equipment can have a certain effect on breaking emulsion to better separate oil from water, but are difficult to be organically combined. The discharged wastewater still contains a large amount of organic matters, has higher COD, can not be directly discharged, and needs further treatment to meet the discharge requirement, thus increasing the construction cost and the operation consumption. In addition, too much reaction product is discharged together with water, which results in a decrease in the yield of the reaction product.

According to the invention, the broadband sound wave generator is arranged in the tank body, and the broadband sound wave generator vibrates to separate oil from water of emulsion formed by water and organic matters. By arranging the filler separation section, the oil phase and the water phase are further separated, the water phase can be directly discharged, and the running cost is reduced.

Preferably, the tank body is connected with the broadband sound wave generator through a connecting rod, and one end of the connecting rod connected with the tank body is provided with a telescopic device for ensuring stable connection between the broadband sound wave generator and the tank body. The telescopic device is composed of a spring, a connecting piece and the like, so that the broadband sound wave generator can not influence the tank body during vibration, and the tank body can not deform to influence the safety of reaction.

Preferably, the broadband sound wave generator comprises an input unit for outputting frequency and a control unit for adjusting frequency.

Preferably, the broadband sound wave generator is arranged at the center of the tank body to enlarge the working area of the broadband sound wave generator. The broadband sound wave generator is arranged at the center of the tank body, so that enough space can be ensured around the broadband sound wave generator to ensure that the oil phase and the water phase are separated.

Preferably, a weir plate is arranged above the first filler separation section, and an oil phase outlet is arranged at the low liquid level of the weir plate.

Preferably, the height of the weir plate is 2% -10% of the tank body. The height of the weir plate is limited to 2% -10% of the height of the tank, since in this height range the oil phase separation is best and the oil phase separation is reduced below or above this height.

Preferably, the frequency conversion range of the broadband sound wave generator is between 1 and 100kHz. The frequency conversion range of the broadband sound wave generator is 1-100 kHz, because the emulsion formed by the organic matters and water can achieve the best oscillation effect under the frequency, and the oil phase and the water phase are separated out.

Preferably, when the broadband sound wave generator is built-in, the broadband sound wave generator is arranged in the middle of the first filler separation section and the second filler separation section.

Preferably, when the broadband sound wave generator is arranged externally, a discharge port of the broadband sound wave generator is connected with a mixed liquid inlet of the tank body.

The broadband sound wave generator is arranged between the first filler separation section and the second filler separation section no matter the broadband sound wave generator is arranged between the first filler separation section and the second filler separation section, the internal sound wave generator is directly arranged between the first filler separation section and the second filler separation section, and materials from the broadband sound wave generator are required to be conveyed to the middle between the first filler separation section and the second filler separation section by the external sound wave generator. The built-in and the built-out have advantages and disadvantages respectively, and the built-in type has the advantages of more efficient demulsification, energy saving and inconvenient cleaning and maintenance. The external broadband sonic generator is convenient to maintain and replace, but has poor separation and demulsification effects.

The filler separation section material comprises a metal material, a high polymer material, a ceramic material and the like, and the filler can play a role in stabilizing, uniformly distribute liquid and strengthen oil-water surface separation. The first and second packing separation sections may be of the same packing type or may employ different packing according to different separation requirements.

In addition, the invention also provides an oil-water separation method utilizing broadband sound waves to demulsify, which comprises the following steps:

the oil-water mixed liquid is demulsified and separated by broadband sound waves, the oil phase liquid is discharged from an oil phase outlet after being further separated upwards through a filler separation section, and the water phase liquid is discharged from a water phase outlet after being further separated downwards through the filler separation section.

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

(1) According to the invention, the broadband sound wave generator is arranged in the tank body, and the broadband sound wave generator vibrates to separate oil from water in the emulsion formed by water and organic matters in the octenal layer. By arranging the filler separation section, the oil phase and the water phase are further separated, the water phase can be directly discharged, and the running cost is reduced;

(2) The COD range of the discharged water phase is between 20ppm and 40ppm, which is reduced by 20 to 30 percent compared with the traditional separation device, and can be directly discharged or recycled.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 is a schematic structural diagram of an oil-water separation system using broadband acoustic demulsification according to the present embodiment;

fig. 2 is a schematic structural diagram of a wideband acoustic generator according to the present embodiment.

Wherein:

the device comprises a 1-tank body, a 2-weir plate, a 3-oil phase outlet, a 4-first filler separation section, a 5-broadband sound wave generator, a 6-mixed liquid inlet, a 7-connecting rod, an 8-second filler separation section, a 9-water phase outlet and a 10-emptying port.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and detailed description, but it will be understood by those skilled in the art that the examples described below are some, but not all, examples of the present invention, and are intended to be illustrative of the present invention only and should not be construed as limiting the scope of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In order to more clearly illustrate the technical scheme of the invention, the following description is given by way of specific examples.

Example 1

Referring to fig. 1-2, a schematic structure diagram of an oil-water separation system using broadband sonic demulsification is provided in embodiment 1. This example is presented in the case of the carbonylation of propylene to produce butanol and octanol. The system comprises a tank body and a broadband sound wave generator, wherein emulsion generated in the production process enters the broadband sound wave generator through a mixed liquid inlet positioned in the middle of the tank body. The broadband sound wave generator is fixed by a special elastic connecting rod, one end of the connecting rod is connected with the tank body, and the other end is connected with the broadband sound wave generator. One end of the connecting rod connected with the tank body is also provided with a telescopic device for stabilizing the broadband sound wave generator. The mixed liquid after broadband sonic demulsification is subjected to stable and efficient separation through a first filler separation section arranged above the broadband sonic generator and a second filler separation section arranged below the broadband sonic generator, the oil phase is recovered after passing through a weir plate and an oil phase outlet which are positioned above the tank body, and the water phase is directly discharged or recycled through a water phase outlet which is positioned below the tank body.

The broadband sound wave generator in the embodiment is built-in and is arranged at the center of the tank body, and the frequency is controlled at 1kHz. The height of the weir plate is 2% of that of the tank body, and the weir plate can be made of corrosion-resistant materials such as stainless steel.

The invention also provides a method for utilizing the broadband sound wave demulsification oil-water separation system, which comprises the following steps:

step one, starting a broadband sonic generator, breaking and separating oil-water mixed liquid through broadband sonic waves, naturally layering larger oil drops and water phases under the action of gravity, and matching the floating emulsion with breaking and separating to accelerate the oil drops adhered to the liquid inlet and the surface of the broadband sonic generator to polymerize.

And secondly, the oil phase density after primary separation by the broadband sound wave separation device is small and slowly rises, and the oil phase density enters a first filler separation section positioned on the upper layer of the broadband sound wave generation device for further separation.

And thirdly, slowly reducing the density of the water phase after primary separation by the broadband sound wave separation device, and entering a second filler separation section positioned at the lower layer of the broadband sound wave generation device for further separation.

And finally, directly recycling the discharged oil phase for subsequent reaction, and improving the total yield of octenal.

Example 2

The other steps are the same as in example 1, except that: the broadband sound wave generator is arranged outside the tank body and is external.

Example 3

The other steps are the same as in example 1, except that: the height of the weir plate is 10% of the tank body.

Example 4

The other steps are the same as in example 1, except that: the frequency of the broadband sound wave generator is 100kHz.

Example 5

The other steps are the same as in example 1, except that: the broadband sound wave generator is tightly attached to the inner wall of the tank body.

The data of Table 1 below are obtained according to examples 1-5:

as can be seen from a comparison of examples 1-6, the height of the weir plate, the frequency of the wideband acoustic generator and the relative position of the wideband acoustic generator and the tank all affect the chemical oxygen demand in the aqueous phase. When the invention is used, the height of the weir plate, the frequency of the broadband sound wave generator and the relative position of the broadband sound wave generator and the tank body can be adjusted according to actual conditions.

Comparative example 1

A set of device for preparing octenal by condensing n-butyraldehyde of 16 ten thousand tons/year is established beside a butyraldehyde condensation process in a factory for producing 25 ten thousand tons of octanol in a certain year. Cooling the reaction material by a cooler to control the reaction temperature at the upper part of the reactor, and circulating the cooled material into the upper part of the condensation reactor; the other path is taken as condensation product octenal to discharge, cooled and cooled, and then enters an octenal chromatographic system to carry out liquid-liquid two-phase separation. Products separated by the octenal chromatography system go to a downstream hydrogenation section; the water phase enters the alkali liquor circulation system partially, and returns to the condensation reactor after supplementing part of NaOH, and the other part enters the high-efficiency emulsion separation system of the invention, passes through the broadband sonic demulsifier with the frequency set to 20kHz, and then passes through the filler separation device for further oil-water separation. Recovering octenal and other organic matters in the oil phase, and directly discharging COD content in the water phase of 50 ppm.

Comparative example 2

And a set of device for preparing octenal by condensing n-butyraldehyde of 10 ten thousand tons/year is established beside the butyraldehyde condensation process in a factory for producing 20 ten thousand tons of octanol in a certain year. Cooling the reaction material by a cooler to control the reaction temperature at the upper part of the reactor, and circulating the cooled material into the upper part of the condensation reactor; the other path is taken as condensation product octenal to discharge, is cooled and directly enters the high-efficiency emulsion separation system, passes through the broadband sonic demulsifier, has the frequency of 20kHz, and then passes through the filler separation device for further oil-water separation. Recovering octenal and other organic matters in the oil phase, and directly discharging the COD content in the water phase of 100 ppm.

The data of the following Table 2 are obtained according to comparative examples 1-2 and example 1:

as compared with comparative examples 1 and 1-2, it is found that comparative examples 1-2 use a high-efficiency emulsion separation system and are not broadband sonic generators, so that the organic matters in comparative examples 1-2 form emulsion with water, the separation effect is poor, the discharged wastewater still contains a large amount of organic matters such as octenal, and the COD is high, and the discharged wastewater cannot be directly discharged. According to the invention, the broadband sound wave generator is arranged in the tank body, and the broadband sound wave generator vibrates to separate oil from water in the emulsion formed by water and organic matters in the octenal layer. By arranging the filler separation section, the oil phase and the water phase are further separated, the water phase can be directly discharged, and the running cost is reduced.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. The utility model provides an utilize oil water separation system of broadband sound wave demulsification, its characterized in that includes the jar body, the inside or the outside of jar body is provided with the broadband sound wave generator that increases emulsion separation effect, the inside of jar body still is provided with the filler separation section that is used for again separating, the filler separation section is including setting up the first filler separation section at jar body top and setting up the second filler separation section of jar body bottom.

2. The oil-water separation system according to claim 1, wherein the tank body is connected with the broadband sound wave generator through a connecting rod, and a telescopic device is arranged at one end of the connecting rod connected with the tank body so as to ensure stable connection between the broadband sound wave generator and the tank body.

3. The oil-water separation system according to claim 1, wherein the broadband sound wave generator comprises an input unit for outputting a frequency and a control unit for adjusting the frequency.

4. The oil-water separation system according to claim 1, wherein the broadband sound wave generator is disposed at a center of the tank body to enlarge a working area of the broadband sound wave generator.

5. The oil-water separation system according to claim 1, wherein a weir plate is arranged above the first filler separation section, and an oil phase outlet is arranged at a low liquid level of the weir plate.

6. The oil-water separation system of claim 5, wherein the height of the weir plate is 2% -10% of the tank.

7. The oil-water separation system according to claim 1, wherein the frequency conversion range of the broadband sound wave generator is between 1kHz and 100kHz.

8. The oil-water separation system of claim 1, wherein the broadband acoustic generator is disposed intermediate the first and second packing separation sections when the broadband acoustic generator is internal.

9. The oil-water separation system according to claim 1, wherein when the broadband sound wave generator is arranged externally, a discharge port of the broadband sound wave generator is connected with a mixed liquid inlet of the tank body.

10. An oil-water separation method using the oil-water separation system using broadband sonic demulsification as claimed in any one of claims 1 to 9, comprising the steps of:

the oil-water mixed liquid is demulsified and separated by broadband sound waves, the oil phase liquid is discharged from an oil phase outlet after being further separated upwards through a filler separation section, and the water phase liquid is discharged from a water phase outlet after being further separated downwards through the filler separation section.

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