CN119240984A - An air flotation-cyclone enhanced oil-water separation experimental analysis device - Google Patents
An air flotation-cyclone enhanced oil-water separation experimental analysis device Download PDFInfo
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- CN119240984A CN119240984A CN202411527157.XA CN202411527157A CN119240984A CN 119240984 A CN119240984 A CN 119240984A CN 202411527157 A CN202411527157 A CN 202411527157A CN 119240984 A CN119240984 A CN 119240984A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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Abstract
本申请提供一种气浮‑旋流强化油水分离实验分析装置，包括混合模块、注气模块、分离模块；所述混合模块包括：原油储罐、原油流量控制阀门、水罐、水流量控制阀门、油水混合器、出口阀门、泵、循环油进口阀门和循环水进口阀门。本申请可实现对气浮‑旋流分离器内不同位置、不同条件的注气，分析出气浮旋流的最优条件，得到气浮旋流条件下内部流场的流动特性，并可实现流体的循环利用。
The present application provides an experimental analysis device for flotation-cyclone enhanced oil-water separation, including a mixing module, an injection module, and a separation module; the mixing module includes: a crude oil storage tank, a crude oil flow control valve, a water tank, a water flow control valve, an oil-water mixer, an outlet valve, a pump, a circulating oil inlet valve, and a circulating water inlet valve. The present application can realize the injection of gas at different positions and under different conditions in the flotation-cyclone separator, analyze the optimal conditions of the flotation cyclone, obtain the flow characteristics of the internal flow field under the flotation cyclone conditions, and realize the recycling of the fluid.
Description
Technical Field
The application relates to the technical field of petrochemical industry, in particular to an air floatation-rotational flow reinforced oil-water separation experimental analysis device.
Background
At present, the separation method of the oil-water mixture mainly comprises a mechanical method and a chemical method, and common mechanical methods comprise a gravity method, a centrifugal method, a coalescence method and the like.
The gravity method utilizes the difference of the densities of the oil and water, and stands for a period of time in a natural state, and the water and the oil are naturally separated to form an upper layer and a lower layer.
The centrifugal method also uses the difference in density of two phases of oil and water, and generates centrifugal force by high-speed rotation of the separation device, thereby realizing separation of oil and water. The centrifugal method has wide application range and higher separation efficiency, but the method has complex equipment and large occupied area, and is difficult to be suitable for a small laboratory.
The coalescence method is an acceleration gravity separation method combining the coalescence process and the gravity separation process into one unit, and has the advantages of high separation efficiency, short residence time and the like. But the separation device is bulky and is not suitable for laboratory use.
Disclosure of Invention
In view of the above, the application provides an air floatation-rotational flow reinforced oil-water separation experimental analysis device which has a simple structure and strong applicability and can obviously improve the oil-water separation efficiency.
In order to achieve the above purpose, the technical scheme adopted by the application is as follows:
An air floatation-rotational flow reinforced oil-water separation experimental analysis device comprises a mixing module, an air injection module and a separation module;
The mixing module comprises a crude oil storage tank, a crude oil flow control valve, a water tank, a water flow control valve, an oil-water mixer, an outlet valve, a pump, a circulating oil inlet valve and a circulating water inlet valve;
the crude oil storage tank is communicated with the oil-water mixer through a crude oil flow control valve, and the water tank is communicated with the oil-water mixer through a water flow control valve;
The gas injection module includes: compressed gas cylinder, gas flow control valve, compressor, external mixing pipe section gas injection control valve, transparent gas injection pipe section, connecting flange, cylinder section gas injection first area, cylinder section gas injection second area, cylinder section gas injection third area, cylinder section gas injection main valve, cylinder section first area gas injection valve, cylinder section second area gas injection valve, cylinder section third area gas injection valve, large cone section gas injection first area, large cone section gas injection second area, large cone section gas injection third area, large cone section gas injection main valve, large cone section first area gas injection valve, large cone section second area gas injection valve, large cone section third area gas injection valve, small cone section gas injection first area a small cone section gas injection second region, a small cone section gas injection third region, a small cone section gas injection total valve, a small cone section first region gas injection valve, a small cone section second region gas injection valve, a small cone section third region gas injection valve, a tail pipe section gas injection first region, a tail pipe section gas injection second region, a tail pipe section gas injection third region, a tail pipe section gas injection total valve, a tail pipe section first region gas injection valve, a tail pipe section second region gas injection valve, a tail pipe section third region gas injection valve, an inner pipe first region, an inner pipe second region, an inner pipe third region, an inner pipe gas injection total valve, an inner pipe first region gas injection valve, an inner pipe second region gas injection valve and an inner pipe third region gas injection valve;
The compressed gas cylinder is respectively connected with an outer mixed pipe section gas injection control valve, a cylinder section gas injection main valve, a large cone section gas injection main valve, a small cone section gas injection main valve, a tail pipe section gas injection main valve and an inner pipe gas injection main valve through gas flow control valves, the outer mixed pipe section gas injection control valve is communicated with the transparent gas injection pipe section, the cylinder section gas injection main valve is connected with a cylinder section first gas injection valve, a cylinder section second gas injection valve and a cylinder section third gas injection valve, the large cone section gas injection main valve is connected with a large cone section first gas injection valve, a large cone section second gas injection valve and a large cone section third gas injection valve, the small cone section gas injection main valve is connected with a small cone section first gas injection valve, a small cone section second gas injection valve and a small cone section third gas injection valve, the cylinder section gas injection main valve is connected with a cylinder section first gas injection valve, a tail pipe section second gas injection valve and an inner pipe section third gas injection valve, and the inner pipe section gas injection valve are connected with the first gas injection main valve, the second gas injection valve and the transparent gas injection pipe section third gas injection main valve;
The separation module comprises a cyclone separator, a separation gas phase outlet valve, a circulating oil inlet valve, an air flotation-cyclone separator and a separation gas storage tank;
The air flotation-cyclone separator is communicated with the cyclone separator through a separator inlet valve, the cyclone separator is communicated with the separation gas storage tank through a separation gas phase outlet valve, the cyclone separator is communicated with the oil-water mixer through a circulating oil inlet valve, and the air flotation-cyclone separator is communicated with the oil-water mixer through a circulating water inlet valve.
Optionally, the oil-water mixer comprises a heating device, a stirrer, a crude oil feed port, a water feed port, a circulating oil feed port and a circulating water feed port, wherein the heating device is positioned outside the oil-water mixer, the stirrer is positioned at the bottom of the oil-water mixer, and the crude oil feed port is connected with a crude oil storage tank and the water feed port is connected with a water tank.
Optionally, the whole air flotation-cyclone separator is made of transparent glass fiber reinforced plastic.
Optionally, the inner tube is hollow cylindrical.
The beneficial effects of the application are as follows:
1. The application has the advantages of compact test flow layout, simple structure and convenient operation, and lays a foundation for improving the oil-water separation efficiency and further perfecting a bubble/liquid drop dynamics and gas-liquid two-phase flow theory system by observing, recording and analyzing the influence of the gas volume fraction and the split ratio in the air flotation-cyclone separator on the separation efficiency and the relation between the split ratio and the pressure drop ratio and comparing.
2. According to the application, the recycling of the fluid can be realized through the re-separation of the separation unit and the re-mixing of the mixing unit, so that the experiment cost is saved;
3. The gas injection module uses partition walls, and can realize the comparison research of different positions and different gas injection diameters by controlling the opening and closing of different valves;
4. The gas injection module is provided with the transparent pipe section and the glass fiber reinforced plastic equipment, so that the movement state and the internal condition of the fluid, such as collision, adhesion, desorption and the like of micro bubbles and oil drops, can be observed under the condition of no shutdown;
5. The application can achieve the function of selecting different gases to compare oil-water separation efficiency by replacing the gas cylinders with different components.
6. The application can accurately detect the internal flow state by using the monitoring probe, can implement the feedback of data to the computer, and can provide a data basis for the deep study of the collision, adhesion and desorption processes of the micro bubbles and the oil drops.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram showing the structure of an experimental analysis device for air-floating and cyclone reinforced oil-water separation.
In fig. 1: 1, a crude oil storage tank, 2, a crude oil flow control valve, 3, a water tank, 4, a water flow control valve, 5, an oil-water mixer, 6, an outlet valve, 7, a pump, 8a, a flange, 8b, a flange, 8c, a flange, 9, a compressed gas cylinder, 10, a gas flow control valve, 11, a compressor, 12, a cylinder section gas injection total valve, 13, a cylinder section first region gas injection valve, 14, a cylinder section second region gas injection valve, 15, a cylinder section third region gas injection valve, 16, a large cone section gas injection total valve, 17, a large cone section first region gas injection valve, 18, a large cone section second region gas injection valve, 19, a large cone section third region gas injection valve, 20, a small cone section gas injection total valve, 21, a small cone section first region gas injection valve, 22, a small cone section second region gas injection valve, 23, a small cone section third region gas injection valve, 24, a tail pipe section gas injection total valve, 25, a tail pipe section one-area gas injection valve, 26, a tail pipe section two-area gas injection valve, 27, a tail pipe section three-area gas injection valve, 28, an inner pipe gas injection main valve, 29, an inner pipe one-area gas injection valve, 30, an inner pipe two-area gas injection valve, 31, an inner pipe three-area gas injection valve, 32, a cylindrical section gas injection area, 32a, a cylindrical section gas injection one-area, 32b, a cylindrical section gas injection two-area, 32c, a cylindrical section gas injection three-area, 33, a large cone section gas injection area, 34, a small cone section gas injection area, 35, a tail pipe section gas injection area, 36, an inner pipe gas injection area, 37, a transparent gas injection pipe section, 38, a separator inlet valve, 39, a separation gas phase outlet valve, 40, a cyclone separator, 41, an outer mixing pipe section gas injection control valve, 42, a circulating oil inlet valve, 43, a circulating water inlet valve, 44, a gas float-cyclone separator, 45 and a separation gas storage tank.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application.
When gas is injected into the cyclone through the microporous pipe, the gas passes through the pores of the microporous pipe and enters the cyclone cavity, and bubbles which are suitable for the particle size of oil drops meet the oil drops in the flow field, so that an oil-gas complex can be formed. The density of the oil-gas complex is smaller than that of oil drops, the oil-gas complex gathers towards the axle center faster than the oil drops under the action of strong centrifugal force, and meanwhile, bubbles can bring some oil drops with tiny particle diameters which cannot be separated by a conventional cyclone into the core, so that the synergistic effect of air flotation and cyclone separation is realized, and the separation effect of the cyclone is improved.
The application relates to an air flotation and cyclone combined type enhanced oil-water separation technology, which utilizes the principle, on one hand, the centrifugal separation is realized by utilizing the density difference among different mediums of a hydrocyclone, on the other hand, the characteristics that the surface tension of oil-water is larger than that of oil-gas in the air flotation technology, the oil is hydrophobic and the air is relatively hydrophilic are utilized, and the separation is realized by utilizing a method that tiny bubbles are generated by virtue of a micropore pipe and oil drops are carried by the tiny bubbles to move towards an overflow port. The combined reinforced oil-water separating technology of air floating and cyclone is one new type of hydrocyclone combining cyclone separating technology with air floating technology, the method overcomes the defects of the conventional liquid-liquid hydrocyclone, has the dual functions of removing oil and suspended matters, and has the advantages of small effective flotation concentration lower limit, high flotation speed and low flotation cost.
In order to research the flotation rule of the device, perfect the bubble/liquid drop dynamics and gas-liquid two-phase flow theory system, more accurately guide the optimal design of the air flotation cyclone combined type enhanced oil-water separation device, and a reasonable and economic air flotation-cyclone enhanced oil-water separation experimental device is very necessary.
As shown in FIG. 1, the application provides an air floatation-rotational flow reinforced oil-water separation experimental analysis device, which comprises a mixing module, an air injection module and a separation module;
The mixing module comprises a crude oil storage tank 1, a crude oil flow control valve 2, a water tank 3, a water flow control valve 4, an oil-water mixer 5, an outlet valve 6, a pump 7, a circulating oil inlet valve 42 and a circulating water inlet valve 43;
The crude oil storage tank 1 is communicated with the oil-water mixer 5 through a crude oil flow control valve 2, and the water tank 3 is communicated with the oil-water mixer 5 through a water flow control valve 4;
The crude oil storage tank 1 guides crude oil into the oil-water mixer 5 through the crude oil flow control valve 2, raw material water enters the oil-water mixer 5 from the water tank 2 through the water flow control valve 4, meanwhile, the treated circulating raw materials enter the oil-water mixer 5 through the respective valves 42 and 43 for recycling, and oil-in-water particles formed after mixing are conveyed to the separation module through the outlet valve 6 through the pump 7.
The gas injection module includes: compressed gas cylinder 9, gas flow control valve 10, compressor 11, outer mixing pipe section gas injection control valve 41, transparent gas injection pipe section 37, transparent pipe section connecting flange 8a 、 b, 8c, cylindrical section gas injection first region 32a, cylindrical section gas injection second region 32b, cylindrical section gas injection third region 32c, cylindrical section gas injection main valve 12, cylindrical section first region gas injection valve 13, cylindrical section second region gas injection valve 14, cylindrical section third region gas injection valve 15, large cone section gas injection first region 33a, large cone section gas injection second region 33b, large cone section gas injection third region 33c, large cone section gas injection main valve 16, large cone section first region gas injection valve 17, large cone section second region gas injection valve 18, large cone section third region gas injection valve 19 a small cone section gas injection first region 34a, a small cone section gas injection second region 34b, a small cone section gas injection third region 34c, a small cone section gas injection main valve 20, a small cone section first region gas injection valve 21, a small cone section second region gas injection valve 22, a small cone section third region gas injection valve 23, a tail pipe section gas injection first region 35a, a tail pipe section gas injection second region 35b, a tail pipe section gas injection third region 35c, a tail pipe section gas injection main valve 24, a tail pipe section first region gas injection valve 25, a tail pipe section second region gas injection valve 26, a tail pipe section third region gas injection valve 27, an inner pipe first region 36a, an inner pipe second region 36b, an inner pipe third region 36c, an inner pipe gas injection main valve 28, an inner pipe first region gas injection valve 29, an inner pipe second region gas injection valve 30 and an inner pipe third region gas injection valve 31;
The compressed gas cylinder 9 is respectively connected with an outer mixed pipe section gas injection control valve 41, a cylindrical section gas injection main valve 12, a large cone section gas injection main valve 16, a small cone section gas injection main valve 20, a tail pipe section gas injection main valve 24 and an inner pipe gas injection main valve 28 through a gas flow control valve 10, the outer mixed pipe section gas injection control valve 41 is communicated with the transparent gas injection pipe section 37, the cylindrical section gas injection main valve 12 is connected with a cylindrical section first gas injection valve 13, a cylindrical section second gas injection valve 14 and a cylindrical section third gas injection valve 15, the large cone section gas injection main valve 16 is connected with a large cone section first gas injection valve 17, a large cone section second gas injection valve 18 and a large cone section third gas injection valve 19, the small cone section gas injection main valve 20 is connected with a small cone section first gas injection valve 21, a small cone section second gas injection valve 22 and a small cone section third gas injection valve 23, the tail pipe section gas injection main valve 24 is connected with a tail pipe section first gas injection valve 25, a second gas injection main valve 26 and a third gas injection valve 31, and an inner pipe section gas injection main valve 37 are connected with a transparent gas injection valve 30, and the outlet gas injection main valve 31 is connected with the first cone section gas injection main valve 7 and the third gas injection main valve 31.
The gas injection module is connected with the air flotation-cyclone separator 44 through micropores, different micropore diameters are partitioned, the micropore diameter of an area a is the largest, the micropore diameter of an area b is the median, the micropore diameter of an area c is the smallest, and the gas injection module is partitioned into a cylindrical section 32, a large cone section 33, a small cone section 34 and a tail pipe section 35 according to different pipe sections, and simultaneously, the gas injection through an inner pipe 36 and the gas injection through a transparent gas injection pipe section 37 are designed, so that the experiment of combining the air flotation and the cyclone is realized.
The gas required by the gas injection module enters the compressor 11 from the compressed gas cylinder 9 through the gas flow control valve 10 and is regulated to the required pressure, and then the gas can be injected at different positions for comparison, ① enters through the external mixing pipe section gas injection control valve 41 through the transparent gas injection pipe section 37 and is mixed with oil-in-water particles, ② flows to the cylinder section 32 through the cylinder section gas injection main valve 12 for gas injection, and a first region 32a, a second region 32b and a third region 32c can be selected for gas injection, and the diameters of micropores in the three regions are different, so that the gas injection of microbubbles with different diameters can be compared. The big cone section 33, the small cone section 34 and the tail pipe section 35 are the same, ③ is directly injected from the air flotation-cyclone separator 44 by the inner pipe section air injection main valve 28, and air injection can be carried out in a first region 36a, a second region 36b and a third region 36c, wherein the diameters of micropores in the third region are different, so that air injection of micro bubbles with different diameters can be compared, and meanwhile, the air injection from a cylindrical section, the big cone section, the small cone section or the tail pipe section is selected by controlling the extending length of the inner pipe into the air flotation-cyclone separator 44.
The cylinder section gas injection main valve 12, the cylinder section first region gas injection valve 13, the cylinder section second region gas injection valve 14 and the cylinder section third region gas injection valve 15 are matched to complete the comparison of gas injection conditions under different micropore diameters of the cylinder section.
The large cone section gas injection main valve 16, the large cone section first region gas injection valve 17, the large cone section second region gas injection valve 18 and the large cone section third region gas injection valve 19 are matched to complete the comparison of gas injection conditions under different micropore diameters of the large cone section.
The small cone section gas injection main valve 20, the small cone section first region gas injection valve 21, the small cone section second region gas injection valve 22 and the small cone section third region gas injection valve 23 are matched to complete the comparison of gas injection conditions under different micropore diameters of the small cone section.
The tail pipe section gas injection main valve 24, the tail pipe section first region gas injection valve 25, the tail pipe section second region gas injection valve 26 and the tail pipe section third region gas injection valve 27 are matched to complete the comparison of gas injection conditions under different micropore diameters of the tail pipe section.
The inner pipe gas injection main valve 28, the inner pipe first area gas injection valve 29, the inner pipe second area gas injection valve 30 and the inner pipe third area gas injection valve 31 are matched to complete the comparison of gas injection conditions under different micropore diameters of the inner pipe.
The separation module includes a cyclone 40, a separated gas phase outlet valve 39, a circulating oil inlet valve 42, an air flotation-cyclone 44, and a separated gas storage tank 45.
The air-float-cyclone separator 44 is communicated with the cyclone separator 40 through the separator inlet valve 38, the cyclone separator 40 is communicated with the separated gas storage tank 45 through the separated gas phase outlet valve 39, the cyclone separator 40 is communicated with the oil-water mixer 5 through the circulating oil inlet valve 42, and the air-float-cyclone separator 44 is communicated with the oil-water mixer 5 through the circulating water inlet valve 43.
The mixed oil-in-water floc particles enter an air flotation-cyclone separator 44 through a transparent air injection pipe section 37, water after air flotation-cyclone separation flows out from the lower part of the device and enters the oil-water mixer 5 again through a circulating water inlet valve 43, separated oil and gas enter the cyclone separator 40, gas enters a storage tank 45 through a gas phase outlet valve 39, and oil enters the oil-water mixer 5 again through a circulating oil inlet valve 42, so that fluid multiphase separation and recycling are realized.
The device can utilize the air floatation cyclone coupling device and observe the internal condition through the transparent device to explore the influence of factors such as gases with different components, bubbles with different particle diameters, liquid drops, gas content, feeding speed, gas flow, circulating pressure and the like on the oil-water separation efficiency. The collision adhesion effect of bubbles and oil drops is researched, so that the oil-water separation efficiency is improved, and experimental data is provided for the air flotation-cyclone reinforced oil-water separation process.
Optionally, the oil-water mixer 5 comprises a heating device 5a, a stirrer 5b, a crude oil feed port 5c, a water feed port 5d, a circulating oil feed port 5e and a circulating water feed port 5f, wherein the heating device 5a is positioned outside the oil-water mixer 5, the stirrer 5b is positioned at the bottom of the oil-water mixer 5, the crude oil feed port 5c is connected with the crude oil storage tank 1, and the water feed port 5d is connected with the water tank 3.
After a proper amount of crude oil and water are introduced through the circulating oil feed port 5e and the circulating water feed port 5f, oil-in-water type floccule particles are formed under the combined action of the heating device 5a and the stirrer 5b, and then the floccule particles are conveyed to the pump 7 through the outlet valve 6, wherein the pump 7 is used for adjusting the pressure of oil-in-water emulsion fluid.
Alternatively, the air-float-cyclone separator 44 is entirely made of transparent glass fiber reinforced plastic.
The air-float-cyclone separator 44 is made of glass fiber reinforced plastic, and can observe the collision condition of micro bubbles and oil-in-water flocs, so as to analyze related data, and can also be used for analyzing the collision, adhesion and desorption results of bubbles and oil drops in real time.
The transparent gas injection pipe section 37 can observe collision data of micro bubbles and oil-in-water flocs, and can be used for analyzing collision, adhesion and desorption results of bubbles and oil drops in real time and observing and recording flow characteristics of oil-in-water emulsion.
Alternatively, the inner tube 36 may be hollow cylindrical and the position of the inner tube gas injection may be controlled by extending the length of the cyclone.
The compressor 11 can regulate the gas injection pressure.
The compressed gas cylinder 9 can be replaced by a gas cylinder with different gas components, and the air floatation efficiency comparison analysis of different gases is carried out.
The application can realize the gas injection of different positions and different conditions in the air flotation-cyclone separator, analyze the optimal conditions of the air flotation cyclone, obtain the flow characteristics of an internal flow field under the air flotation cyclone condition, and realize the recycling of fluid.
The foregoing is merely illustrative of embodiments of the present application, and the present application is not limited thereto, and any changes or substitutions can be easily made by those skilled in the art within the technical scope of the present application, and the present application is intended to be covered by the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
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