Gas-liquid mixing system and method and application thereof

Abstract

The invention relates to the technical field of gas-liquid mixing, and discloses a gas-liquid mixing system and method and application thereof. The system comprises: a reaction tank, which is provided with at least one gas-phase material inlet; the hollow mixing pipe is arranged in the reaction tank, and the upper end and the lower end of the hollow mixing pipe are open so as to meet the requirements of liquid-phase material introduction and product output; at least one through hole is formed in the pipe wall of the hollow mixing pipe, so that a gas-phase material can enter the hollow mixing pipe from the through hole to be in contact with the liquid-phase material; an electromagnet is arranged on the outer wall of the reaction tank, and under the action of current, an N pole of the electromagnet and an S pole of the magnet can generate an electromagnetic field in the reaction tank. The gas-liquid mixing system provided by the invention can realize high-efficiency gas-liquid mixing, and solves the problems of polymerization and coking reaction among macromolecules in a heavy liquid-phase raw material, especially coking of heavy and inferior oil products in the mixing process.

Description

Technical Field

[0001] The present invention relates to the technical field of gas-liquid mixing, and in particular to a gas-liquid mixing system and method and applications thereof. Background Art

[0002] The chemical industry involves many gas-liquid mixing and reaction processes. In the gas-liquid mixing and reaction process, co-current or counter-current mixing is carried out, in which the gas-phase material mostly exists as large bubbles when the gas-liquid phase is mixed, which causes uneven gas-liquid mixing and poor mass transfer efficiency. In order to achieve full mixing and enhance the gas-liquid mass transfer effect, it is often necessary to introduce excessive gas phase to meet the requirements. Excessive gas not only increases energy consumption, investment and safety risks, but also affects the reaction efficiency of chemical reactions after gas-liquid mixing.

[0003] On the other hand, in the field of petrochemicals, many liquid materials, especially heavy oil substances, contain a large number of complex condensed ring structure colloids, asphaltene, etc., which are very easy to aggregate and coke under the action of molecular polarity, resulting in poor gas-liquid mixing and the formation of coke scale, which causes channel blockage and affects the subsequent chemical reaction effects, and also increases energy consumption, investment and safety risks.

[0004] In view of the shortcomings of the above-mentioned conventional gas-liquid mixing methods, researchers have developed a variety of gas-liquid mixing methods and devices.

[0005] CN116899424A discloses a low-energy gas-liquid mixing system and a low-energy gas-liquid mixing method, the system includes a gas-liquid mixing device, the gas-liquid mixing device includes a shell and a mixing reaction unit arranged in the shell, the lower part and the top part of the shell are respectively provided with an air inlet and an air outlet, the mixing reaction unit includes a plurality of reaction chambers which are sequentially stacked from bottom to top and are connected to each other by fluid, a non-linear fluid channel is formed between the plurality of reaction chambers which are connected to each other by fluid, the reaction chamber at the bottom layer is connected to the air inlet fluid, and the reaction chamber at the top layer is connected to the outlet gas. This scheme improves the gas-liquid reaction efficiency, reduces the volume of the gas-liquid mixing device, and reduces energy consumption; however, the device structure is complicated, and an excess of gas is still required to meet the reaction requirements.

[0006] CN103657463A discloses a gas-liquid mixing method, which includes injecting gas into liquid through a through hole with an average pore size of nanometer size, thereby mixing the gas with the liquid; the method is carried out in a mixing device, the mixing device includes at least one liquid channel for accommodating the liquid and at least one gas channel for accommodating the gas, the liquid channel and the gas channel are adjacent to each other through a component having a through hole with an average pore size of nanometer size, and the gas is injected into the liquid through the through hole. This solution can achieve good results for light oil products in the oil refining field, but cannot solve the gas-liquid mixing and reaction problems of heavy oil products, especially heavy and inferior oil products rich in colloid asphaltene.

[0007] Therefore, there is an urgent need to develop a method that can achieve efficient gas-liquid mixing and solve problems such as coking of heavy and inferior oil products during the mixing process, so as to simplify the process flow, reduce investment, reduce energy consumption and safety risks in the mixing process, and improve the gas-liquid mass transfer rate and the effect of subsequent chemical reactions. Summary of the invention

[0008] The purpose of the present invention is to solve the problems of poor mixing effect of the gas-liquid mixing system in the prior art and inability to be applied to the gas-liquid mixing of heavy and inferior oil products.

[0009] In order to achieve the above object, a first aspect of the present invention provides a gas-liquid mixing system, the system comprising:

[0010] A reaction tank, wherein at least one gas-phase material feed port is provided on the reaction tank;

[0011] A hollow mixing tube is built into the reaction tank, and the upper and lower ends of the hollow mixing tube are both open to meet the requirements of the introduction of liquid materials and the output of products; at least one through hole is opened on the wall of the hollow mixing tube, so that the gaseous material can enter the hollow mixing tube through the through hole to contact with the liquid material;

[0012] An electromagnet is disposed on the outer wall of the reaction tank. Under the action of electric current, the N pole of the electromagnet and the S pole of the magnet can generate an electromagnetic field in the reaction tank.

[0013] A second aspect of the present invention provides a method for gas-liquid mixing, which is performed in the system described in the first aspect and comprises:

[0014] (1) In the presence of an electromagnetic field and under the condition that K is 0.01-1 MPa, a liquid material transported into the hollow mixing tube through one end opening of the hollow mixing tube is contacted and mixed with a gas material transported into the reaction tank through a feed port to obtain a gas-liquid mixture; K=AB is defined, where A is the feed pressure of the gas material and B is the feed pressure of the liquid material;

[0015] (2) The gas-liquid mixture is output from the other end opening of the hollow mixing tube.

[0016] The third aspect of the present invention provides the gas-liquid mixing system described in the first aspect and the gas-liquid mixing method described in the second aspect for use in gas-liquid mixing of heavy and inferior oil products.

[0017] The gas-liquid mixing system provided by the present invention can significantly promote the uniform mixing of the gas phase and the liquid phase, and effectively improve the solubility of the gas phase in the liquid phase and the gas-liquid mass transfer rate, thereby reducing the energy consumption of the gas-liquid mixing and reaction process and improving the reaction efficiency.

[0018] In particular, the gas-liquid mixing system of the present invention can achieve efficient gas-liquid mixing and solve the polymerization and coking reactions between macromolecules in heavy liquid phase raw materials, especially the coking problem of heavy and inferior oil products during the mixing process, which can simplify the process flow, reduce investment, and reduce energy consumption and safety risks in the mixing process.

[0019] In the petrochemical hydrogenation process, investment is reduced by more than 50% and energy consumption is reduced by more than 40%.

[0020] When used in delayed coking units, it can significantly extend the production cycle of coking heating furnaces, reduce the fuel consumption of heating furnaces, reduce the ratio of coke yield to residual carbon in raw oil, reduce coke yield and increase light oil yield;

[0021] When used in catalytic cracking units, it can improve the atomization effect of the atomizing nozzle of the riser reactor, increase the gasoline + liquefied gas yield by more than 1%, and increase the economic benefits of the catalytic unit;

[0022] When used in asphalt oxidation devices, it can significantly reduce oxidation reaction time, reduce tail gas emissions by more than 90%, increase reaction speed, reduce environmental pollution, and increase the economic benefits of the device.

[0023] When used in energy storage negative electrode coke devices, it can reduce the difficulty of transporting raw asphalt, significantly improve the dispersion effect of raw asphalt, prevent coking in the heating system, improve product quality, and increase the economic benefits of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the structure of a gas-liquid mixing system under a preferred specific embodiment provided by the present invention;

[0025] Figure 2 It is a direct view of the gas-liquid mixture prepared in Example 1 provided by the present invention;

[0026] Figure 3 This is a schematic diagram of a gas-liquid phase chemical reaction under a preferred embodiment provided by Test Example B-1 of the present invention;

[0027] Figure 4 This is a schematic diagram of a gas-liquid phase chemical reaction under a preferred embodiment provided by Test Example B-2 of the present invention;

[0028] Figure 5 This is a schematic diagram of a gas-liquid phase chemical reaction under a preferred embodiment provided by Test Example B-3 of the present invention;

[0029] Figure 6 This is a simplified diagram of a gas-liquid phase chemical reaction under a preferred embodiment provided as an example by Test Example B-4 of the present invention.

[0030] Description of Reference Numerals

[0031] 1. Hollow mixing tube

[0032] 2. Through hole

[0033] 3. Reactor

[0034] 4. Gas phase material feed port

[0035] 5. The N pole of the electromagnet

[0036] 6. The S pole of the electromagnet DETAILED DESCRIPTION

[0037] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0038] As mentioned above, the first aspect of the present invention provides a gas-liquid mixing system, such as Figure 1 As shown, the system includes:

[0039] A reaction tank 3, wherein at least one gas phase material feed port 4 is provided on the reaction tank 3;

[0040] A hollow mixing tube 1 is built into the reaction tank 3, and the upper and lower ends of the hollow mixing tube 1 are both open to meet the requirements of the introduction of liquid materials and the output of products; at least one through hole 2 is opened on the wall of the hollow mixing tube 1, so that the gaseous material can enter the hollow mixing tube 1 through the through hole 2 to contact with the liquid material;

[0041] An electromagnet is disposed on the outer wall of the reaction tank 3 . Under the action of electric current, the N pole 5 of the electromagnet and the S pole 6 of the magnet can generate an electromagnetic field in the reaction tank 3 .

[0042] In the present invention, the material of the electromagnet includes but is not limited to soft magnetic materials, hard magnetic materials, ferrite magnetic materials, paramagnetic materials, diamagnetic materials, and ferromagnets composed of transition elements iron, cobalt, nickel and their alloys that can generate a magnetic field under the action of an electric field.

[0043] Preferably, the average thickness of the wall of the hollow mixing tube 1 is 0.5-20 mm, and more preferably 1-3 mm. The inventors have found that under this preferred embodiment, the hollow mixing tube 1 can have sufficient strength and the best mixing effect.

[0044] Preferably, the outer diameter of the tube wall of the hollow mixing tube 1 is 5-100 mm; more preferably 20-50 mm.

[0045] Preferably, the hollow mixing tube 1 is a straight channel or a spiral channel; preferably a spiral channel.

[0046] In the present invention, the term "channel" refers to a space capable of containing materials.

[0047] Preferably, the inner wall of the hollow mixing tube 1 is also provided with an inorganic material film and / or an organic material film, the inorganic material film is selected from at least one of ceramic materials, glass materials, and metal materials; the organic material film is selected from at least one of cellulose ester films, polyamide films, polysulfone films, fluorine-containing material films, polycarbonate films, polyester films, and polyolefin films; more preferably, the inner wall of the hollow mixing tube 1 is provided with an inorganic material film.

[0048] Preferably, the average diameter of each through hole 2 is 1-1000 nm; more preferably 10-45; particularly preferably 20-45 nm.

[0049] Preferably, the arrangement density of the through holes 2 is 10 6 -10 7 Pieces / mm 2 The inventors have found through creative research that the density of the through holes 2 will affect the gas phase flow rate and ultimately affect the mixing effect. Therefore, in the present invention, the density of the through holes 2 is preferably limited to 10 6 -10 7 Pieces / mm 2 .

[0050] Preferably, the reaction tank 3 is cylindrical, with a diameter of 0.5-2.5 m and a height of 2-5 m.

[0051] Preferably, the number of the hollow mixing tubes 1 is greater than one.

[0052] As mentioned above, the second aspect of the present invention provides a method for gas-liquid mixing, which is performed in the system described in the first aspect, comprising:

[0053] (1) In the presence of an electromagnetic field and under the condition that K is 0.01-1 MPa, a liquid material transported into the hollow mixing tube 1 through one end opening of the hollow mixing tube 1 is contacted and mixed with a gas material transported into the reaction tank 3 through a feed port 4 to obtain a gas-liquid mixture; K=AB is defined, where A is the feed pressure of the gas material and B is the feed pressure of the liquid material;

[0054] (2) The gas-liquid mixture is output from the other end opening of the hollow mixing tube 1.

[0055] Preferably, the electromagnetic field strength is 0.01-10 Tesla, preferably 0.1-3 Tesla, and more preferably 0.5-3 Tesla.

[0056] Preferably, K is 0.2-1 MPa. The inventors found that in this preferred embodiment, the gaseous material can enter the hollow mixing tube 1 through the through hole 2 under the pressure difference to contact the liquid material, and the gaseous material can form an emulsified mixture with the liquid material in a more uniform microbubble shape.

[0057] Preferably, in step (2), the contact mixing conditions include: pressure of 0.1-50 MPa, preferably 2-10 MPa, more preferably 5-8 MPa; temperature of -100-1000°C, preferably -100-500°C, more preferably 20-400°C.

[0058] Preferably, the ratio of the conveying volume flow rate of the gas phase material to the conveying volume flow rate of the liquid phase material is 0.01-500:1, preferably 0.1-20:1, and more preferably 0.5-3:1.

[0059] In the present invention, the gaseous materials are all materials that can exist in gaseous phase, including but not limited to hydrogen, oxygen, gas, liquefied gas, water vapor, nitrogen, carbon dioxide, methane, ethane, propane, ethylene, propylene, butene, etc.

[0060] The liquid phase materials are all materials that can exist in liquid phase, including but not limited to water, gasoline, kerosene, diesel, aromatics, coal tar, catalytic oil slurry, wax oil, residual oil, naphtha, crude oil, catalytic raw materials, coking raw materials, asphalt, etc.

[0061] As mentioned above, the third aspect of the present invention provides the gas-liquid mixing system described in the first aspect and the gas-liquid mixing method described in the second aspect for use in gas-liquid mixing of heavy and inferior oil products.

[0062] Preferably, the heavy and low-quality oil products include residual oil, asphalt, and dirty oil.

[0063] The present invention will be described in detail below by way of examples but the present invention is not limited thereby.

[0064] Example 1

[0065] This embodiment uses the gas-liquid mixing system provided by the present invention for gas-liquid mixing, and the specific implementation steps include:

[0066] Gas phase material: water vapor; Liquid phase material: inferior residual oil;

[0067] The gas-liquid mixing system used in this embodiment is as follows: Figure 1 As shown, including:

[0068] A reaction tank 3, wherein a gas phase material feed port 4 is provided on the reaction tank 3;

[0069] A hollow mixing tube 1 is built into the reaction tank 3, and the upper and lower ends of the hollow mixing tube 1 are both open to meet the requirements of the introduction of liquid materials and the output of products; a through hole 2 is opened on the wall of the hollow mixing tube 1, so that the gaseous material can enter the hollow mixing tube 1 through the through hole 2 to contact with the liquid material;

[0070] An electromagnet is disposed on the outer wall of the reaction tank 3 . Under the action of electric current, the N pole 55 of the electromagnet and the S pole 6 of the magnet can generate an electromagnetic field in the reaction tank 3 .

[0071] The average thickness of the wall of the hollow mixing tube 1 is 1 mm; the outer diameter is 30 mm;

[0072] The average diameter of each through hole 2 is 40 nm; the arrangement density of the through holes 2 is 10 7 Pieces / mm 2 ;

[0073] The diameter of the reaction tank 3 is 0.9 m and the height is 3.5 m;

[0074] The number of the hollow mixing tubes 1 is 120.

[0075] The gas-liquid mixing method comprises:

[0076] (1) In the presence of an electromagnetic field and under the condition that K is 0.45 MPa, a liquid material transported into the hollow mixing tube 1 through one end opening of the hollow mixing tube 1 is contacted and mixed with a gas material transported into the reaction tank 3 through a feed port 4 to obtain a gas-liquid mixture; K=AB is defined, where A is the feed pressure of the gas material and B is the feed pressure of the liquid material;

[0077] (2) outputting the gas-liquid mixture from the other end opening of the hollow mixing tube 1 to obtain a gas-liquid mixture S1;

[0078] Wherein, the electromagnetic field strength is 1 Tesla;

[0079] In step (1), the contact mixing conditions include: pressure of 1 MPa and temperature of 210°C;

[0080] The liquid material delivery rate is 145m 3 / hour; the gas phase material delivery rate is 300m 3 / hour.

[0081] The present invention also exemplarily provides an intuitive visual diagram of the gas-liquid mixture S1 provided in Example 1, such as Figure 2 As shown in the figure, it can be seen that the mixing of inferior residual oil and water vapor using the system of the present invention can form a gas-liquid emulsion phase fluid.

[0082] In order to further illustrate the gas-liquid mixing system of the present invention on the gas-liquid reaction effect in different fields, the mixing effect and reaction effect of the gas-liquid mixing system of the present invention on different gas-liquid phase chemical reactions are specifically described below in combination with test examples.

[0083] Test Example B-1

[0084] This test example applies the gas-liquid mixing system of the present invention to the pretreatment of catalytic cracking feedstock, as follows:

[0085] A gas-liquid mixing system provided in Example 1 of the present invention is added before the catalytic cracking riser reactor. The gas-liquid mixing method provided in Example 1 is used to introduce low-quality residual oil (liquid phase material) into the hollow mixing tube 1, and water vapor (gas phase material) is introduced into the gas phase material feed port 4. Under the action of pressure difference, water vapor enters the through hole 2 and mixes with the liquid phase material in the hollow mixing tube 1. The emulsified material after the gas phase and the liquid phase are mixed enters the N pole 5 and the S pole 6 of the electromagnet to form a uniform emulsified product, and then enters the catalytic cracking riser reactor ( Figure 3 ).

[0086] Comparative process: The gas-liquid mixing system provided by the present invention is not used.

[0087] The reaction products of the processes under the above two different mixing modes were measured, and the test results are shown in Table 2.

[0088] Table 2

[0089]

[0090] It can be seen from Table 2 that for the same catalytic cracking raw material under the same reaction conditions, after being treated by the gas-liquid mixing system of the present invention, the yield of light components in the catalytic cracking reaction is significantly increased (the yield of liquefied gas + gasoline is increased by 0.88 percentage points) and the coking rate is significantly reduced (the coking rate is reduced by 0.48 percentage points).

[0091] Test Example B-2

[0092] This test example applies the gas-liquid mixing system of the present invention to the mixing of water vapor and heavy oil in a heating furnace of a delayed coking process, as follows:

[0093] A gas-liquid mixing system provided in Example 1 of the present invention is added before the reactor of the delayed coking heating furnace. The gas-liquid mixing method provided in Example 1 is adopted (the liquid phase material is the coking raw material). The coking raw material is pumped from bottom to top into the hollow mixing tube 1 in the reaction tank 3. Water vapor (gas phase material) enters the reaction tank 3 from the feed port 4 on the side of the reaction tank 3. Under the action of the pressure difference, it passes through the through hole 2 and diffuses from the outside to the inside through the outer wall of the hollow mixing tube 1. Then, it contacts and reacts with the coking raw material in the hollow mixing tube 1. The gas-liquid mixture after contact and mixing in the hollow mixing tube 1 enters the coke tower from bottom to top to undergo a coking reaction. The reaction product goes to the fractionation system to obtain coking dry gas, gasoline, diesel, light wax oil and wax oil and other products ( Figure 4 ).

[0094] Comparative process: The gas-liquid mixing system provided by the present invention is not used.

[0095] Table 3 shows the comparison of the heating furnace conditions after the coking heating furnace achieves the same effect using the above two different mixing methods.

[0096] Table 3

[0097]

[0098]

[0099] It can be seen from Table 3 that under the condition that the raw material requirements of the subsequent coke tower are met, the fuel consumption of the process heating furnace treated by the present invention is significantly reduced (reduced by 1000Nm per hour). 3 ), the hourly processing capacity can reach nearly 7 times that of the traditional process (the liquid hourly space velocity is increased from 3 to 20), the blower inverter frequency is significantly reduced (reduced by 24%), the induced draft fan inverter frequency (reduced by 14%), and the furnace tube temperature and furnace temperature of the heating furnace are significantly reduced (the furnace tube temperature is reduced by an average of about 88.8°C, and the furnace temperature is reduced by an average of about 43.3°C).

[0100] Test Example B-3

[0101] This test example applies the gas-liquid mixing system of the present invention to the mixing of the process of producing hydrogen peroxide by anthraquinone method, as follows:

[0102] A gas-liquid mixing system provided in Example 1 of the present invention is added before the hydrogenation stage reactor, and a similar method as that provided in Example 1 is used for gas-liquid mixing (the inferior residual oil in Example 1 is replaced by the working liquid raw material of alkyl anthraquinone, and the water vapor is replaced by hydrogen, and the other parameters remain unchanged), specifically: the working liquid raw material (liquid phase material) containing alkyl anthraquinone enters the hollow mixing tube 1 in the reaction tank 3 from bottom to top through a pump, and the hydrogen (gas phase material) enters the reaction tank 3 from the feed port 4 on the side of the reaction tank 3, passes through the through hole 2 under the action of the pressure difference, and diffuses from the outside to the inside through the outer wall of the hollow mixing 1, and then contacts and mixes with the alkyl anthraquinone in the hollow mixing tube 1 to generate hydrogenated anthraquinone, and the hydrogenated anthraquinone enters the subsequent oxidation stage from the other end opening of the hollow mixing tube 1 for further processing ( Figure 5 ).

[0103] Comparative process: The gas-liquid mixing system provided by the present invention is not used.

[0104] The comparison of the reaction effects under the same reaction conditions using the above two different mixing methods is shown in Table 4.

[0105] Table 4

[0106]

[0107] It can be seen from Table 4 that under the same reaction conditions, the hydrogenation efficiency of the process treated by the gas-liquid mixing system of the present invention is significantly improved (from 6.0 g / l to 10.0 g / l), and the processing volume per unit time is significantly increased (the liquid hourly space velocity is increased from 10.0 h -1 Increased to 30.0h -1 ), the loss of raw material anthraquinone was significantly reduced (the degradation amount of anthraquinone dropped from 12g / l to 5g / l).

[0108] Test Example B-4

[0109] This test example applies the gas-liquid mixing system of the present invention to the mixing of asphalt and air in the process of producing oxidized asphalt of energy storage negative electrode materials, as follows:

[0110] A gas-liquid mixing system provided in Example 1 of the present invention is added after the asphalt heating storage tank, and the gas-liquid mixing method provided in Example 1 is adopted (the liquid phase material is the asphalt raw material, and the gas phase material is air). The heated asphalt raw material enters the hollow mixing tube 1 in the reaction tank 3 from bottom to top through a pump, and the air enters the reaction tank 3 from the feed port 4 on the side of the reaction tank 3. Under the action of the pressure difference, it passes through the through hole 2 and diffuses from the outside to the inside through the outer wall of the hollow mixing tube 1. Then, it contacts and mixes with the heated asphalt in the hollow mixing tube 1 to generate high-quality oxidized asphalt. The oxidized asphalt enters the subsequent oxidation storage tank ( Figure 6 ).

[0111] Comparative process: The gas-liquid mixing system provided by the present invention is not used.

[0112] The comparison of the reaction effects under the same reaction conditions using the above two different mixing methods is shown in Table 5.

[0113] Table 5

[0114]

[0115]

[0116] It can be seen from Table 5 that under the same reaction conditions, the process air consumption after treatment with the gas-liquid mixing system of the present invention is reduced to 1.6% of the original process, and the reaction time is significantly reduced to only 40% of the original process.

[0117] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A gas-liquid mixing system, characterized in that: The system includes: A reaction tank (3), wherein the reaction tank (3) is provided with at least one gas-phase material feed port (4); A hollow mixing tube (1) is built into the reaction tank (3), and the upper and lower ends of the hollow mixing tube (1) are both open to allow the introduction of liquid-phase materials and the output of products; at least one through hole (2) is provided on the wall of the hollow mixing tube (1), so that gas-phase materials can enter the hollow mixing tube (1) through the through hole (2) to contact the liquid-phase materials; An electromagnet is arranged on the outer wall of the reaction tank (3); under the action of electric current, the N pole (5) of the electromagnet and the S pole (6) of the magnet can generate an electromagnetic field in the reaction tank (3).

2. The system according to claim 1, characterized in that The average thickness of the wall of the hollow mixing tube (1) is 0.5-20 mm, preferably 1-3 mm; the outer diameter is 5-100 mm, preferably 20-50 mm; And / or, the average diameter of each of the through holes (2) is 1-1000 nm, preferably 10-45 nm.

3. The system according to claim 1 or 2, characterized in that: The arrangement density of the through holes (2) is 10 6 -10 7 Pieces / mm 2 .

4. The system according to claim 3, characterized in that The number of the hollow mixing tubes (1) is greater than one.

5. A gas-liquid mixing method, characterized in that: The method is carried out in the system according to any one of claims 1 to 4, comprising: (1) In the presence of an electromagnetic field and under the condition that K is 0.01-1 MPa, a liquid material transported into the hollow mixing tube (1) through one end opening of the hollow mixing tube (1) is contacted and mixed with a gas material transported into the reaction tank (3) through a feed port (4) to obtain a gas-liquid mixture; K=AB is defined, wherein A is the feed pressure of the gas material, and B is the feed pressure of the liquid material; (2) The gas-liquid mixture is output from the other end opening of the hollow mixing tube (1).

6. The method according to claim 5, characterized in that The electromagnetic field strength is 0.01-10 Tesla, preferably 0.1-3 Tesla.

7. The method according to claim 5 or 6, characterized in that: The K is 0.2-1 MPa.

8. The method according to any one of claims 5 to 7, characterized in that: In step (2), the contact mixing conditions include: pressure of 0.1-50 MPa, preferably 0.2-10 MPa; temperature of -100-1000°C, preferably -100-500°C.

9. The method according to any one of claims 5 to 8, characterized in that: The ratio of the conveying volume flow rate of the gas phase material to the conveying volume flow rate of the liquid phase material is 0.01-500:1, preferably 0.1-20:

1.

10. The gas-liquid mixing system according to any one of claims 1 to 4 and the gas-liquid mixing method according to any one of claims 5 to 9 are used in gas-liquid mixing of heavy and inferior oil products; Preferably, the heavy and low-quality oil products include residual oil, asphalt, and dirty oil.

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