Efficient natural gas deacidification device

Abstract

The utility model discloses an efficient natural gas deacidification device which comprises a shell, a gas inlet pipe and a liquid discharge pipe are communicated with the bottom of the shell, a cutting steel wire net is arranged at the bottom of the shell, amine liquid is filled in the bottom of the shell, the liquid level of the amine liquid is higher than the cutting steel wire net, a secondary deacidification unit is arranged in the middle of the shell, and a secondary deacidification unit is arranged in the middle of the shell. The top of the shell is communicated with a gas outlet pipe and a lean amine liquid pipe; the lean amine liquid pipe is positioned below the gas outlet pipe; according to the efficient natural gas deacidification device disclosed by the utility model, the gas inlet pipe is improved to extend into the shell and is bent downwards, the pipe wall is provided with the division grooves, a large gas mass is divided into small gas masses with different sizes, and the small gas masses are further cut into fine gas masses in cooperation with the separation steel wire mesh, so that the contact area between gas and amine liquid is increased, and the deacidification effect is improved; in addition, the secondary deacidification unit is adopted, the lean amine solution is introduced, the contact area of the lean amine solution and the natural gas is increased, two deacidification operations are achieved, and the deacidification effect is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas deacidification technology, specifically a kind of high-efficiency natural gas deacidification device. BACKGROUND

[0002] Untreated natural gas often contains CO2, H2S, methane, ethane and the like, wherein CO2 and H2S are collectively referred to as acid gas. H2S is an acid gas with a pungent odor of rotten egg, and hydrogen sulfide acid formed by combining with water is easy to corrode gas pipelines, and SO2 formed by burning with methane has a non-negligible impact on the environment. CO2 combines with water to form carbonic acid, which is more ionized and more corrosive to metals, and high CO2 concentration can affect the combustibility of natural gas. Therefore, before natural gas enters the long-distance pipeline, the content of these acid gases in the natural gas must be reduced as much as possible to meet the relevant requirements.

[0003] The existing improvement scheme for natural gas deacidification generally splits the natural gas and amine liquid, and increases the contact area between the amine liquid and the natural gas during the convection process, thereby improving the removal efficiency of acid gas. However, in such a deacidification gas equipment, the natural gas inlet position is single, the mixing of natural gas and amine liquid is insufficient, and a motor and a stirring device need to be added for stirring, resulting in increased production cost and complex and difficult equipment maintenance. SUMMARY

[0004] To solve the above-mentioned defects of the prior art, the utility model provides a kind of high-efficiency natural gas deacidification device, additional steel wire net, divide gas into small air mass, increase the contact area of gas and amine liquid, improve deacidification effect, and cooperate secondary deacidification unit, improve the contact area of lean amine liquid and natural gas, further improve deacidification effect.

[0005] To achieve the above technical purpose, the utility model adopts the following technical scheme: a kind of high-efficiency natural gas deacidification device, including shell, the bottom of the shell is communicated with gas inlet pipe and liquid discharge pipe, the bottom of the shell is equipped with cutting steel wire net, the bottom of the shell is filled with amine liquid, the liquid level of the amine liquid is over the cutting steel wire net, the middle part of the shell is equipped with secondary deacidification unit, the top of the shell is communicated with gas outlet pipe and lean amine liquid pipe, the lean amine liquid pipe is located below gas outlet pipe;The gas outlet end of the gas inlet pipe extends into the shell and is bent downward, the pipe wall of the gas outlet end of the gas inlet pipe is uniformly distributed with division groove, the division groove is set with downward opening.

[0006] Preferably, the inner wall of the bottom of the shell is uniformly provided with a support, the support is provided with a fastener, the cutting steel wire net is provided with a mounting plate, and the fastener passes through the mounting plate from top to bottom to fix the cutting steel wire net to the support.

[0007] Preferably, the secondary deacidification unit comprises, from bottom to top, a support grid, a secondary deacidification layer, a liquid distributor, a support wire mesh and a corrugated plate filler layer, the support grid is provided with a plurality of support blocks at the bottom, the support blocks are fixed to the inner wall of the shell, the secondary deacidification layer is used to realize the convection of natural gas and lean amine liquid, the support wire mesh is used to separate the liquid distributor and the corrugated plate filler layer, and the liquid distributor and the corrugated plate filler layer are used to uniformly distribute the lean amine liquid to soak the secondary deacidification layer.

[0008] Preferably, the liquid distributor comprises a support plate, an outer contour is arranged at the top of the outer periphery of the support plate, a plurality of bosses are uniformly arranged at the top of the support plate, an opening downward liquid outlet hole is arranged in the middle of the boss, a liquid inlet hole and a gas outlet hole are arranged on the outer wall of the boss, the liquid inlet hole is arranged below the gas outlet hole, and the liquid inlet hole and the gas outlet hole are in communication with the liquid outlet hole.

[0009] Preferably, the liquid outlet end of the lean amine liquid pipe extends into the shell.

[0010] Preferably, a demister is arranged between the gas outlet pipe and the lean amine liquid pipe, and a plurality of support strips are arranged below the demister and fixed to the inner wall of the shell.

[0011] In summary, the high-efficiency natural gas deacidification device has the following technical effects:

[0012] The high-efficiency natural gas deacidification device improves the inlet pipe to extend into the shell and bend downward, and a split groove is arranged on the pipe wall to divide large gas groups into small gas groups of different sizes, cooperates with the separation wire mesh to further cut the small gas groups into fine gas groups, increases the contact area of the gas and the amine liquid, improves the deacidification effect, and further improves the deacidification effect by using the secondary deacidification unit, introducing the lean amine liquid, and increasing the contact area of the lean amine liquid and the natural gas. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic view of the high-efficiency natural gas deacidification device of the utility model;

[0014] Figure 2 is a structural schematic view of the cutting wire mesh of the high-efficiency natural gas deacidification device of the utility model;

[0015] Figure 3 is a structural schematic view of the secondary deacidification unit of the high-efficiency natural gas deacidification device of the utility model;

[0016] Figure 4 is a three-dimensional structural schematic view of the liquid distributor of the high-efficiency natural gas deacidification device of the utility model;

[0017] Figure 5It is the structure schematic view of the liquid distributor of the efficient natural gas deacidification device.

[0018] The description of the drawings reference sign: 1, air inlet pipe;2, support;3, fastener;4, cutting steel wire net;401, mounting plate;5, support block;6, support grid;7, secondary deacidification layer;8, liquid distributor;801, outer contour;802, boss;803, liquid inlet hole;804, gas outlet hole;805, liquid outlet hole;9, support steel wire net;10, corrugated plate filler layer;11, lean amine liquid pipe;12, support strip;13, demister;14, gas outlet pipe;15, shell;16, liquid discharge pipe. DETAILED DESCRIPTION

[0019] The utility model will be made further detailed description in combination with the drawings.

[0020] The embodiment is only the explanation of the utility model, and it is not the limitation of the utility model, and the person skilled in the art can make the modification of no creative contribution according to the need after reading the specification, but as long as in the claim range of the utility model, it is protected by the patent law.

[0021] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms 'center', 'longitudinal', 'lateral', 'length', 'width', 'thickness', 'upper', 'lower', 'front','rear', 'left', 'right','vertical', 'horizontal', 'top', 'bottom', 'inner', 'outer', 'clockwise', 'counterclockwise', 'axial', 'radial', 'circumferential' are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as the limitation of the utility model.

[0022] In addition, the terms 'first','second' are only for the description purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with 'first','second' can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of'multiple' is two or more than two, unless there is a clear specific limitation.

[0023] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication of two elements or the interaction of two elements.For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium.Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature.The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0025] Embodiment one:

[0026] As shown in Figure 1 A high-efficiency natural gas deacidification device, comprising a shell 15, the bottom of the shell 15 is communicated with an air inlet pipe 1 and a liquid discharge pipe 16, the bottom of the shell 15 is provided with a cutting steel wire mesh 4, the bottom of the shell 15 is filled with amine liquid, the liquid level of the amine liquid is above the cutting steel wire mesh, the middle of the shell 15 is provided with a secondary deacidification unit, the top of the shell 15 is communicated with an air outlet pipe 14 and a lean amine liquid pipe 11, the lean amine liquid pipe 11 is located below the air outlet pipe 14;Wherein the shell 15 is a cylinder.

[0027] The high-efficiency natural gas deacidification device of the embodiment, by improving the air inlet pipe 1 into the shell 15 and bending downward, the pipe wall is provided with a split groove, the large gas group is divided into small gas groups of different sizes, and the separation steel wire mesh is further cut into small gas groups, the contact area of the gas and the amine liquid is increased, and the deacidification effect is improved, and the secondary deacidification unit is used, the lean amine liquid is introduced, and the contact area of the lean amine liquid and the natural gas is increased, the deacidification operation is realized twice, and the deacidification effect is further improved.

[0028] The air outlet end of the air inlet pipe 1 extends into the shell 15 and bends downward, the pipe wall of the air outlet end of the air inlet pipe 1 is uniformly distributed with split grooves, and the split grooves are arranged downward;And the air outlet end position is located at the center of the shell 15, so that the gas dispersion is more uniform.

[0029] As shown in Figure 2As shown, the bottom inner wall of the shell 15 is uniformly provided with a support 2, the support 2 is matched with a fastener 3, the cutting steel wire net 4 is provided with a mounting plate 401, the fastener 3 penetrates the mounting plate 401 from top to bottom for fixing the cutting steel wire net to the support 2; wherein the support 2 and the fastener 3 are both u-shaped, the mounting plate 401 is provided with two insertion holes for matching the fastener 3, and the assembly is convenient and fast.

[0030] As shown in the figure, Figure 3 As shown, the secondary deacidification unit includes a support grid 6, a secondary deacidification layer 7, a liquid distributor 8, a support steel wire net 9 and a corrugated plate packing layer 10 arranged in sequence from bottom to top, the bottom of the support grid 6 is provided with a plurality of support blocks 5, the support blocks 5 are fixed to the inner wall of the shell 15, the secondary deacidification layer 7 is used to realize the convection of natural gas and lean amine liquid, the support steel wire net 9 is used to separate the liquid distributor 8 and the corrugated plate packing layer 10, the liquid distributor 8 and the corrugated plate packing layer 10 are used to uniformly distribute the lean amine liquid to soak the secondary deacidification layer 7; wherein the secondary deacidification layer 7 is a corrugated packing layer, the support grid 6 is used to support the secondary deacidification layer 7, the liquid distributor 8, the support steel wire net 9 and the corrugated plate packing layer 10, the support steel wire net 9 is used to place the corrugated plate packing layer 10 to block the liquid distributor 8, the corrugated plate packing layer 10 plays a buffering role, slows down the flow speed of the lean amine liquid, and guides the stable and uniform flow of the amine liquid to the liquid distributor 8.

[0031] As shown in the figure, Figures 4-5 As shown, the liquid distributor 8 includes a support plate, the outer periphery top of the support plate is provided with an outer contour 801, the support plate top is uniformly distributed with a boss 802, the middle of the boss 802 is provided with an opening downward liquid outlet hole 805, the outer wall of the boss 802 is provided with a liquid inlet hole 803 and a gas outlet hole 804, the liquid inlet hole 803 is located below the gas outlet hole 804, and the liquid inlet hole 803 and the gas outlet hole 804 are both communicated with the liquid outlet hole 805.

[0032] The liquid outlet end of the lean amine liquid pipe 11 extends into the shell 15.

[0033] The demister 13 is provided between the gas outlet pipe 14 and the lean amine liquid pipe 11, a plurality of support strips 12 are provided below the demister 13, and the support strips 12 are fixed to the inner wall of the shell 15; the demister 13 mainly removes liquid mist and solid particles.

[0034] The lean amine solution in the lean amine solution pipe 11 is sprayed, falls into the liquid distributor 8 through the corrugated plate packing layer 10, enters the secondary deacidification layer 7 through the liquid inlet hole 803 and the liquid outlet hole 805, and the natural gas can flow upwards from the gas outlet hole 804, the outer contour 801 and the liquid inlet hole 803 ensure that the liquid surface in the liquid distributor 8 is permanently horizontal, the liquid uniformly flows out from the liquid outlet hole 805, the boss 802 supports the steel wire mesh 9, the untreated natural gas enters the shell 15 through the gas inlet pipe 1, flows out from the split groove structure at the end of the liquid inlet pipe to form gas groups of different sizes, collides with the relatively fine split steel wire mesh 4 to be split into smaller bubbles, and is subjected to the first deacidification treatment with the amine solution, the lean amine solution fills the gap area in the secondary deacidification layer 7, and the natural gas can flow upwards after being contacted with the lean amine solution; further removes the acidic gas in the gas, and is discharged from the gas outlet pipe 14 after passing through the liquid distributor 8, the supporting steel wire mesh 9, the corrugated plate packing layer 10 and the demister 13.

[0035] The above merely describes the preferred implementation manner of the present application, and does not limit the present application in any form, and any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments all belong to the scope of the technical scheme of the present application.

Claims

1. A high efficient natural gas deacidification device, characterized in that, The application relates to a natural gas amine absorption device, which comprises a shell, an air inlet pipe and a liquid outlet pipe communicated with the bottom of the shell, a cutting steel wire mesh arranged at the bottom of the shell, amine liquid filled in the shell, the liquid surface of the amine liquid being higher than the cutting steel wire mesh, a secondary deacidification unit arranged at the middle of the shell, an air outlet pipe and a lean amine liquid pipe communicated with the top of the shell, and the lean amine liquid pipe being arranged below the air outlet pipe; the air outlet end of the air inlet pipe is bent downwards and extends into the shell, and the pipe wall of the air outlet end of the air inlet pipe is uniformly provided with a plurality of segmentation grooves with downward openings.

2. The high-efficiency natural gas deacidification device according to claim 1, characterized in that, The inner wall of the bottom of the shell is uniformly provided with supports, the supports are matched with buckles, the cutting steel wire mesh is provided with mounting plates, and the buckles pass through the mounting plates from top to bottom so as to fix the cutting steel wire mesh on the supports.

3. The high-efficiency natural gas deacidification device according to claim 1, characterized in that, The secondary deacidification unit comprises, from bottom to top, a support grid, a secondary deacidification layer, a liquid distributor, a support steel wire mesh and a corrugated plate filler layer, the bottom of the support grid is provided with a plurality of support blocks fixed on the inner wall of the shell, the secondary deacidification layer is used for realizing the convection of natural gas and lean amine liquid, the support steel wire mesh is used for separating the liquid distributor and the corrugated plate filler layer, and the liquid distributor and the corrugated plate filler layer are used for uniformly distributing the lean amine liquid to soak the secondary deacidification layer.

4. The high-efficiency natural gas deacidification device according to claim 3, characterized in that, The liquid distributor comprises a support plate, the outer periphery of the top of the support plate is provided with an outer contour, the top of the support plate is uniformly provided with a plurality of bosses, the middle of each boss is provided with a liquid outlet hole with a downward opening, the outer wall of each boss is provided with an inlet hole and an air outlet hole, the inlet hole is arranged below the air outlet hole, and the inlet hole and the air outlet hole are communicated with the liquid outlet hole.

5. The efficient natural gas deacidification device according to claim 1, characterized in that, The liquid outlet end of the lean amine liquid pipe extends into the shell.

6. The efficient natural gas deacidification device according to claim 1, characterized in that, A demister is arranged between the air outlet pipe and the lean amine liquid pipe, a plurality of support strips are arranged below the demister, and the support strips are fixed on the inner wall of the shell.

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