Tubular gas-liquid atomization contact absorber suitable for large liquid-gas ratio working condition

Abstract

The invention provides a tubular gas-liquid atomization contact absorber suitable for a working condition with a large liquid-gas ratio. The tubular gas-liquid atomization contact absorber comprises a gas flow stabilizing tube, a liquid atomization element and a gas-liquid mixing contact tube, the liquid atomization element comprises a liquid injection pipe, an atomization pipe and a hollow flow guide body, the atomization pipe is arranged at the downstream end of the gas flow stabilizing pipe, and an auxiliary gas flow slit is formed between the atomization pipe and the gas flow stabilizing pipe; the atomizing pipe comprises a gas contraction accelerating section and a throat pipe; a gas dispersion expansion section is arranged at the inlet end of the gas-liquid mixing contact pipe; the gas contraction acceleration section, the throat pipe and the gas dispersion expansion section are sequentially communicated in the airflow flowing direction, and the hollow flow guide body is located at the joint of the gas contraction acceleration section and the throat pipe; and a spray hole communicated with the liquid injection pipe is formed in the gas contraction acceleration section so as to generate centripetal jet flow. The device is compact in structure, reasonable in design, high in gas-liquid mixing contact uniformity, capable of reducing the liquid drop wall attachment effect and suitable for natural gas and biogas decarburization treatment under the large liquid-gas ratio working condition and the small-diameter tubular space condition.

Description

Technical Field

[0001] The present invention relates to a tubular gas-liquid atomizing contact absorption device for purifying and treating highly acidic gases such as natural gas and biogas, and in particular to the technical field of gas-liquid atomizing mixed contact mass transfer in pipelines, and specifically to a tubular gas-liquid atomizing contact absorber suitable for working conditions with a large liquid-to-gas ratio. Background Art

[0002] The presence of acidic gases such as CO2 is inevitable in the extracted natural gas. The presence of CO2 will reduce the combustion calorific value of natural gas, aggravate pipeline corrosion and freeze low-temperature equipment. Therefore, natural gas needs to be decarbonized to ensure the safety of natural gas storage, transportation and use. At present, the methods for removing CO2 from natural gas mainly include dry decarbonization and wet decarbonization. Wet decarbonization is divided into physical absorption and chemical absorption. Among them, amine absorption is the most commonly used method for natural gas decarbonization. The amount of absorbent used in the natural gas amine solution absorption decarbonization process is often large, and the liquid-gas ratio varies in a wide range; gas-liquid contact absorption equipment generally uses tower equipment such as bubble towers and structured packing towers, which have problems such as large volume and weight. The tubular contact absorption equipment based on micro-droplet gas-liquid co-current enhanced mass transfer has the advantages of large gas-liquid volume mass transfer number, light weight, compact structure, and small footprint. It is more suitable for offshore platforms or remote oil and gas fields with restrictions on equipment volume and weight.

[0003] In US Patent No. 7128276, Statoil ASA of Norway proposed a tubular turbulent contactor structure for selective absorption of acidic gases. The main body adopts a venturi tube structure, and the liquid is injected through the slit on the contraction cone of the venturi tube, forming a liquid film on the contraction cone, and then the liquid film is broken into droplets. This structure uses wall slit injection and liquid film crushing and atomization. However, when the liquid-gas ratio is too large, the crushed atomization particle size will be larger, the gas-liquid mass transfer efficiency will be greatly reduced, and it cannot adapt to the decarbonization of natural gas under a large liquid-gas ratio.

[0004] US Patent US20170043306 optimizes the above patent by setting multiple contraction cone structures in the pipeline to improve the injection volume of liquid in large diameter pipelines, and thus the gas-liquid ratio range. However, liquid fragmentation still involves the liquid film being broken and atomized into droplets in the airflow, and the liquid film is difficult to enter the high-speed airflow and be atomized into uniform small droplets, resulting in larger droplets after fragmentation and atomization, and a decrease in the gas-liquid interface mass transfer coefficient and the uniformity of gas-liquid mixing contact, which cannot adapt to the purification of natural gas with high carbon content in a large liquid-gas ratio range.

[0005] In addition, US Patent US20170145803 proposes a compact tubular contact absorber for natural dehydration. The main structure consists of a flange, an annular space flow channel, a central guide cone and its support pipe, etc. The liquid flows evenly into the support pipe from the annular flow channel inside the flange. The windward side and side of the support pipe are provided with spray holes. The liquid is sprayed from the spray holes into the airflow and atomized into droplets. The surface of the central guide cone is provided with a gas flow channel to blow away and atomize the liquid film attached to the wall. However, it is still not suitable for the removal of high carbon content in natural gas under large liquid-to-gas ratio conditions. At the same time, the large diameter and broken droplets are easy to form a liquid film on the pipe wall, resulting in excessive use of absorbent and high economic cost.

[0006] Domestic independent research in this area started late. Kong Lingzhen, Chen Jiaqing and others from Beijing Institute of Petrochemical Technology proposed a tubular parallel flow gas-liquid contact absorber in patent CN111471499A. Liquid injection is carried out by a central ellipsoidal guide cone and a trapezoidal cone. A guide cone liquid annular flow channel is provided in the central ellipsoidal guide cone. The outer tube liquid annular flow channel is connected to the guide cone liquid annular flow channel through a plurality of liquid annular flow channel connecting pipes. A plurality of liquid inlet holes are distributed circumferentially on the outer wall of the guide cone, and an auxiliary atomizing gas flow channel is arranged axially inside to blow away the liquid film attached to the wall surface of the tail end of the guide cone and atomize it. However, this structure adopts liquid injection through the spray hole on the surface of the guide body. When the amount of liquid injected is too large, the liquid column will be sprayed onto the wall of the pipe to form a large amount of liquid film, and the liquid ejected from the jet cannot be effectively broken and atomized, resulting in a decrease in the gas-liquid interface mass transfer coefficient and the uniformity of gas-liquid mixed contact. Therefore, it cannot be applied to the effective removal of high carbon content in natural gas under large liquid-gas ratio conditions.

[0007] In summary, the existing tubular atomizing contact absorber has a large tube diameter, and the gas-liquid crushing atomization mixing effect is poor under the condition of a large liquid-to-gas ratio, and cannot be used for the efficient removal of carbon dioxide under the condition of high carbon content of natural gas. It is necessary to propose a tubular gas-liquid atomizing contact absorber that is suitable for the condition of a large liquid-to-gas ratio.

[0008] In view of this, the present invention is proposed. Summary of the invention

[0009] The purpose of the present invention is to provide a tubular gas-liquid atomizing contact absorber adapted to a large liquid-gas ratio working condition, so as to solve the technical problem that the existing tubular atomizing contact absorber in the prior art has design defects, the pipe diameter is large, the gas-liquid crushing atomizing mixing effect is poor under the condition of a large liquid-gas ratio, and it cannot be applied to the efficient removal of carbon dioxide under the condition of high carbon content of natural gas. The many technical effects that can be produced by the preferred technical solution among the many technical solutions provided by the present invention are described in detail below.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] The present invention provides a tubular gas-liquid atomizing contact absorber that is adaptable to large liquid-to-gas ratio working conditions, comprising a gas stabilizing flow tube, a liquid atomizing element and a gas-liquid mixing contact tube; the gas stabilizing flow tube is provided with a gas inlet; the liquid atomizing element comprises an injection tube, an atomizing tube and a hollow flow guide, the atomizing tube is arranged at the downstream end of the gas stabilizing flow tube, and an auxiliary airflow slit is formed between the atomizing tube and the gas stabilizing flow tube; the atomizing tube comprises a gas contraction acceleration section and a throat; the inlet end of the gas-liquid mixing contact tube is provided with a gas dispersion expansion section, and the outlet end is provided with a gas-liquid mixing outlet; the gas contraction acceleration section, the throat and the gas dispersion expansion section are connected in sequence along the flow direction of the gas flow, and the hollow flow guide is located at the junction of the gas contraction acceleration section and the throat; a plurality of spray holes are opened on the gas contraction acceleration section, and the injection tube is connected with the spray holes to generate a centripetal jet.

[0012] Preferably, the liquid injection pipe is provided with a liquid injection port for introducing a liquid absorbent; the liquid injection pipe is provided with a liquid flow channel for connecting the liquid injection port with the spray hole.

[0013] Preferably, the inner diameters of the gas steady flow tube and the gas-liquid mixing contact tube are both 20 mm to 150 mm, and the inner diameter of the liquid flow channel is 3 mm to 10 mm.

[0014] Preferably, the contraction angle of the gas contraction acceleration section is 10° to 20°, the spray holes are arranged centripetally along the circumference of the gas contraction acceleration section on its windward surface, and the diameter of the spray holes is 0.2 mm to 1 mm.

[0015] Preferably, the expansion angle of the gas dispersion expansion section is 15° to 35°.

[0016] Preferably, auxiliary airflow slits communicating with each other are provided between the gas contraction acceleration section and the gas steady flow tube, and between the throat tube, the gas steady flow tube and the gas dispersion expansion section.

[0017] Preferably, the width of the slit between the throat and the gas dispersion expansion section is 0.1 mm to 1.5 mm, and the fillet radius of the downstream outer wall of the throat is 5 mm to 15 mm.

[0018] Preferably, the diameter of the hollow flow channel of the hollow flow guide is 1 mm to 5 mm, the radius of the fillet of the upstream outer wall is 1 mm to 5 mm, and the radius of the fillet of the downstream outer wall is 0.5 mm to 4 mm.

[0019] Preferably, the hollow flow guide is connected to the throat through a support column.

[0020] Preferably, the length of the gas-liquid mixing contact tube is 10 to 40 times the diameter of the tube.

[0021] The preferred technical solution of the present invention can at least produce the following technical effects:

[0022] The present invention effectively avoids the technical problems that the existing tubular atomizing contact absorber in the prior art has design defects, such as large tube diameter, poor gas-liquid crushing atomization mixing effect under the condition of large liquid-gas ratio, and cannot be applied to the efficient removal of carbon dioxide under the condition of high carbon content of natural gas. The present invention provides a tubular gas-liquid atomizing contact absorber adapted to the working condition of large liquid-gas ratio, including a gas steady flow tube, a liquid atomizing element and a gas-liquid mixing contact tube; the gas steady flow tube is provided with a gas inlet; the liquid atomizing element includes a liquid injection tube, an atomizing tube and a hollow guide body, the atomizing tube is arranged at the downstream end of the gas steady flow tube, and an auxiliary air flow slit is formed between the atomizing tube and the gas steady flow tube; the atomizing tube includes a gas contraction acceleration section and a throat; the inlet end of the gas-liquid mixing contact tube is provided with a gas dispersion expansion section, and the outlet end is provided with a gas-liquid mixing outlet; the gas contraction acceleration section, the throat and the gas dispersion expansion section are sequentially connected along the flow direction of the gas flow, and the hollow guide body is located at the junction of the gas contraction acceleration section and the throat; a plurality of spray holes are opened on the gas contraction acceleration section, and the liquid injection tube is connected with the spray holes to generate a centripetal jet. The present invention achieves more uniform gas-liquid mixing through the synergistic effect of the gas flow stabilizing tube, the liquid atomizing element and the gas-liquid mixing contact tube. The overall structure is compact and the design is reasonable. It not only reduces the droplet wall adhesion effect, but also improves the uniformity of gas-liquid mixing contact. It is particularly suitable for natural gas and biogas decarbonization treatment under large liquid-to-gas ratio conditions and small diameter tubular space conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a tubular gas-liquid atomizing contact absorber adapted to a large liquid-to-gas ratio working condition provided by the present invention;

[0025] Figure 2 It is a structural schematic diagram of a liquid atomizing element of a tubular gas-liquid atomizing contact absorber adapted to a large liquid-to-gas ratio working condition provided by the present invention;

[0026] Figure 3 A schematic cross-sectional structure diagram of an auxiliary air flow slit of a tubular gas-liquid atomizing contact absorber adapted to a large liquid-to-gas ratio working condition provided by the present invention;

[0027] Figure 4 The present invention provides a left view of a tubular gas-liquid atomizing contact absorber adapted to a large liquid-to-gas ratio working condition.

[0028] In the figure:

[0029] 1. Gas inlet; 2. Gas flow stabilizing tube; 3. Liquid atomizing element; 31. Liquid injection tube; 311. Liquid injection port; 312. Liquid flow channel; 32. Gas contraction acceleration section; 321. Nozzle; 33. Throat; 34. Hollow flow guide; 4. Gas-liquid mixing contact tube; 41. Gas dispersion expansion section; 5. Gas-liquid mixing outlet; 6. Auxiliary air flow slit; 7. Support column. DETAILED DESCRIPTION

[0030] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0031] like Figure 1-Figure 4 As shown, the present invention provides a tubular gas-liquid atomizing contact absorber suitable for large liquid-gas ratio working conditions, comprising a gas steady flow tube 2, a liquid atomizing element 3 and a gas-liquid mixing contact tube 4; the gas steady flow tube 2 is provided with a gas inlet 1; the liquid atomizing element 3 comprises a liquid injection tube 31, an atomizing tube and a hollow flow guide 34, the atomizing tube is arranged at the downstream end of the gas steady flow tube 2, and an auxiliary air flow slit 6 is formed between the atomizing tube and the gas steady flow tube 2; the atomizing tube comprises a gas contraction acceleration section 32 and a throat 33; the inlet end of the gas-liquid mixing contact tube 4 is provided with a gas dispersion expansion section 41, and the outlet end is provided with a gas-liquid mixing outlet 5; the gas contraction acceleration section 32, the throat 33 and the gas dispersion expansion section 41 are connected in sequence along the flow direction of the gas flow, and the hollow flow guide 34 is located at the junction of the gas contraction acceleration section 32 and the throat 33; a plurality of spray holes 321 are opened on the gas contraction acceleration section 32, and the liquid injection tube 31 is connected with the spray holes 321 to generate a centripetal jet.

[0032] Through the synergistic effect of the gas flow stabilizing tube 2, the liquid atomizing element 3 and the gas-liquid mixing contact tube 4, the gas-liquid mixing is made more uniform, the overall structure is compact, and the design is reasonable. It not only reduces the droplet wall adhesion effect, but also improves the uniformity of gas-liquid mixing contact. It is particularly suitable for natural gas and biogas decarbonization treatment under large liquid-to-gas ratio conditions and small diameter tubular space conditions.

[0033] As an optional implementation, the liquid injection pipe 31 is provided with a liquid injection port 311 for introducing a liquid absorbent; the liquid injection pipe 31 is provided with a liquid flow channel 312 for connecting the liquid injection port 311 with the spray hole 321 .

[0034] As an optional implementation, the inner diameters of the gas steady flow tube 2 and the gas-liquid mixing contact tube 4 are both 20 mm to 150 mm, and the inner diameter of the liquid flow channel 312 is 3 mm to 10 mm.

[0035] As an optional implementation, the contraction angle ɑ of the gas contraction acceleration section 32 is 10° to 20°, the nozzle 321 is arranged centripetally along the circumference of the gas contraction acceleration section 32 on its windward surface, and the diameter d of the nozzle 321 is 0.2 mm to 1 mm.

[0036] Such arrangement can ensure that the liquid absorbent forms a centripetal jet liquid column, and guide and accelerate the airflow to efficiently shear and break the centripetal jet liquid column.

[0037] As an optional embodiment, the expansion angle β of the gas dispersion expansion section 41 is 15° to 35°.

[0038] This arrangement can slow down the airflow and promote gas-liquid mixing.

[0039] As an optional implementation, an auxiliary airflow slit 6 communicating with each other is provided between the gas contraction acceleration section 32 and the gas steady flow tube 2 , and between the throat 33 and the gas steady flow tube 2 and the gas dispersion expansion section 41 .

[0040] Such an arrangement can enhance the crushing atomization effect.

[0041] As an optional embodiment, the width of the auxiliary airflow slit 6H1 between the throat 33 and the gas dispersion expansion section 41 is 0.1 mm to 1.5 mm, and the fillet radius R2 of the downstream outer wall of the throat 33 is 5 mm to 15 mm.

[0042] As an optional implementation, the diameter H0 of the hollow flow channel of the hollow flow guide 34 is 1 mm to 5 mm, the radius R0 of the fillet of the upstream outer wall is 1 mm to 5 mm, and the radius R1 of the fillet of the downstream outer wall is 0.5 mm to 4 mm.

[0043] As an optional implementation, the hollow flow guide 34 is connected to the throat 33 via a support column 7 .

[0044] Furthermore, the hollow flow guide 34 , the support column 7 and the throat pipe 33 are connected by welding.

[0045] As an optional embodiment, the length of the gas-liquid mixing contact tube 4 is 10 to 40 times the diameter of the tube.

[0046] It should be noted that the gas flow stabilizing tube 2, liquid injection tube 31 and gas-liquid mixing contact tube 4 of the present invention can be connected to the existing pipeline system by flange or welding, can be flexibly arranged according to the on-site space, have no internal moving parts, and have low manufacturing, transportation and operating costs.

[0047] Working principle of the present invention:

[0048] The high-carbon natural gas or biogas to be treated enters the gas steady flow pipe 2 from the gas inlet 1 and flows stably to the gas contraction acceleration section 32 .

[0049] In the gas contraction acceleration section 32, the airflow is gradually accelerated and contracted. At the same time, the liquid absorbent enters the spray hole 321 from the liquid injection pipe 31, generates a centripetal jet liquid column, and sprays into the contraction and acceleration airflow.

[0050] When the injection amount of the liquid absorbent is small, the ejected liquid column forms a liquid film on the wall of the throat 33 under the action of the contraction-accelerated airflow, and the liquid film is blown up by the high-speed airflow generated by the auxiliary airflow slit 6 and atomized.

[0051] When the injection volume of the liquid absorbent is large, the ejected liquid column is torn, broken or hits the surface of the hollow guide body 34 under the action of the contraction-accelerated airflow, thereby achieving broken atomization. A small part of the splashed droplets form a liquid film on the wall of the throat 33, and are blown up and atomized by the high-speed airflow of the auxiliary airflow slit 6. At the same time, most of the broken atomized droplets are driven by the high-speed airflow generated by the hollow flow channel of the hollow guide body 34 to gather toward the center of the throat 33, reducing the bounding effect of the broken droplets. At the same time, the broken droplets are driven by the high-speed airflow generated by the central hole of the hollow guide body 34, and the atomized droplets around the throat 33 gather toward the center, reducing the bounding effect of the broken droplets. With the flow of the high-speed airflow, the droplets reach the auxiliary airflow slit 6 between the throat 33 and the gas dispersion expansion section 41, and are broken and atomized again into more uniform micro-droplets.

[0052] In the gas dispersion expansion section 41, the gas flow is gradually expanded and decelerated, and is fully mixed with the micro-droplets.

[0053] Finally, in the gas-liquid mixing contact tube 4 , the mixed gas flow and liquid droplets undergo a violent contact absorption reaction to remove carbon dioxide from the natural gas or biogas, and the carbon dioxide is discharged through the gas-liquid mixing outlet 5 .

[0054] The spray hole 321 of the present invention is arranged on the windward side of the gas contraction acceleration section 32. This arrangement can generate a centripetal spray liquid column in the gas contraction acceleration section 32, and the gas-liquid mixed contact mass transfer effect is good, which is particularly suitable for natural gas decarbonization treatment in large liquid-gas ratio conditions and small diameter pipeline environments. In addition, the setting of the hollow flow guide 34 allows the broken and atomized droplets to converge to the center of the throat 33, effectively reducing the droplet wall attachment effect. At the same time, the auxiliary air flow slit 6 at the throat 33 blows up the wall liquid film formed on the wall of the throat 33 and the incoming flow droplets to tear, break and atomize, further improving the gas-liquid enhanced mass transfer performance.

[0055] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0056] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "an example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A tubular gas-liquid atomizing contact absorber adapted to large liquid-gas ratio conditions, characterized in that: It includes a gas flow stabilizing tube, a liquid atomizing element and a gas-liquid mixing contact tube; the gas flow stabilizing tube is provided with a gas inlet; the liquid atomizing element includes a liquid injection tube, an atomizing tube and a hollow guide body, the atomizing tube is arranged at the downstream end of the gas flow stabilizing tube, and an auxiliary airflow slit is formed between the atomizing tube and the gas flow stabilizing tube; the atomizing tube includes a gas contraction acceleration section and a throat; the inlet end of the gas-liquid mixing contact tube is provided with a gas dispersion expansion section, and the outlet end is provided with a gas-liquid mixing outlet; the gas contraction acceleration section, the throat and the gas dispersion expansion section are connected in sequence along the flow direction of the airflow, and the hollow guide body is located at the junction of the gas contraction acceleration section and the throat; a plurality of spray holes are opened on the gas contraction acceleration section, and the liquid injection tube is connected with the spray holes to generate a centripetal jet.

2. The tubular gas-liquid atomizing contact absorber adapted to the working condition of large liquid-gas ratio according to claim 1 is characterized in that: The liquid injection pipe is provided with a liquid injection port for introducing a liquid absorbent; the liquid injection pipe is provided with a liquid flow channel for connecting the liquid injection port with the spray hole.

3. The tubular gas-liquid atomizing contact absorber adapted to the working condition of large liquid-gas ratio according to claim 2 is characterized in that: The inner diameters of the gas steady flow tube and the gas-liquid mixing contact tube are both 20 mm to 150 mm, and the inner diameter of the liquid flow channel is 3 mm to 10 mm.

4. The tubular gas-liquid atomizing contact absorber adapted to a large liquid-gas ratio working condition according to claim 2, characterized in that: The contraction angle of the gas contraction acceleration section is 10° to 20°, the spray holes are arranged centripetally along the circumference of the gas contraction acceleration section on its windward surface, and the diameter of the spray holes is 0.2 mm to 1 mm.

5. The tubular gas-liquid atomizing contact absorber adapted to a large liquid-gas ratio working condition according to claim 1, characterized in that: The expansion angle of the gas dispersion expansion section is 15° to 35°.

6. The tubular gas-liquid atomizing contact absorber adapted to a large liquid-gas ratio working condition according to claim 1, characterized in that: Auxiliary air flow slits communicating with each other are arranged between the gas contraction acceleration section and the gas steady flow tube, and between the throat tube, the gas steady flow tube and the gas dispersion expansion section.

7. The tubular gas-liquid atomizing contact absorber adapted to a large liquid-gas ratio working condition according to claim 6, characterized in that: The width of the slit between the throat and the gas dispersion expansion section is 0.1 mm to 1.5 mm, and the fillet radius of the downstream outer wall of the throat is 5 mm to 15 mm.

8. The tubular gas-liquid atomizing contact absorber adapted to a large liquid-gas ratio working condition according to claim 1, characterized in that: The diameter of the hollow flow channel of the hollow flow guide is 1 mm to 5 mm, the radius of the fillet of the upstream outer wall is 1 mm to 5 mm, and the radius of the fillet of the downstream outer wall is 0.5 mm to 4 mm.

9. The tubular gas-liquid atomizing contact absorber adapted to a large liquid-gas ratio working condition according to claim 1, characterized in that: The hollow flow guide is connected to the throat through a support column.

10. The tubular gas-liquid atomizing contact absorber adapted to a large liquid-gas ratio working condition according to claim 3, characterized in that: The length of the gas-liquid mixing contact tube is 10 to 40 times of its diameter.

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