A wellhead natural gas aerosol impurity removal system

Abstract

The present invention discloses a wellhead natural gas aerosol impurity removal system, relating to the technical field of aerosol impurities. The system comprises a raw gas filter, an activated carbon filter, a dust filter, a first pipe connected to the air inlet of the raw gas filter, a second pipe for connecting the air outlet of the raw gas filter with the air inlet of the activated carbon filter, a third pipe for connecting the air outlet of the activated carbon filter with the air inlet of the dust filter, and a fourth pipe connected to the air outlet of the dust filter. By providing the raw gas filter, the activated carbon filter, and the dust filter, the removal system of the present invention achieves efficient removal of impurities from the raw gas, solves the problem of ineffective aerosol removal, avoids foaming caused by the MDEA solution in the purification process and cold box freezing and clogging, significantly reduces production and operating costs, and improves efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of aerosol impurities, and in particular relates to a wellhead natural gas aerosol impurity removal system. Background Art

[0002] Because some natural gas wells currently produce oil, even after the raw gas filters remove impurities, some oil remains in the form of aerosols, entering subsequent processing steps along with the natural gas. The MDEA solution used in the purification process may foam when exposed to oil, causing it to enter the dehydration process along with the natural gas, resulting in solution loss and contamination of the molecular sieves used in this process. Furthermore, the cold box used in the liquefaction process may freeze and become blocked due to the oil contamination. Therefore, it is necessary to remove the oil contamination in the form of aerosols.

[0003] In the existing technology, the wellhead natural gas impurity removal system is composed of a raw gas filter, a pressure gauge, a pressure monitor, etc. After the raw gas is filtered, the natural gas enters the subsequent processing link to obtain the target product.

[0004] The existing wellhead natural gas impurity removal system, after filtering through the raw gas filter and entering the subsequent processing stages, cannot effectively remove some oil contaminants in the form of aerosols. This causes foaming of the MDEA solution in the purification stage and freezing and blockage of the cold box. The foamed MDEA solution easily enters the next stage with the gas, resulting in solution loss and molecular sieve contamination. This not only impacts daily production but also requires additional MDEA solution replenishment, replacement of contaminated molecular sieves, and cold box deblocking, increasing production and operating costs and unnecessary losses. Summary of the Invention

[0005] In order to avoid the above problems, the present invention discloses a wellhead natural gas aerosol impurity removal system, which comprises:

[0006] a raw gas filter;

[0007] an activated carbon filter;

[0008] a dust filter;

[0009] a first pipe connected to an air inlet of a raw gas filter;

[0010] a second pipe, the two ends of which are respectively connected to the outlet of the raw gas filter and the inlet of the activated carbon filter;

[0011] a third pipe, the two ends of which are respectively connected to the air outlet of the activated carbon filter and the air inlet of the dust filter;

[0012] A fourth pipe is connected to the air outlet of the dust filter.

[0013] Furthermore, a first pressure gauge and a first valve are installed in sequence along the direction of gas flow in the first pipeline; a second valve, a second pressure gauge, a third pressure gauge, and a third valve are installed in sequence along the direction of gas flow in the second pipeline; a fourth valve, a fourth pressure gauge, a fifth pressure gauge, and a fifth valve are installed in sequence along the direction of gas flow in the third pipeline; and a sixth valve and a sixth pressure gauge are installed in sequence along the direction of gas flow in the fourth pipeline.

[0014] Furthermore, the system of the present invention further comprises:

[0015] A pressure differential monitor, wherein two connection points of the pressure differential monitor are respectively located on the first pipeline between the first pressure gauge and the first valve, and on the fourth pipeline between the sixth valve and the sixth pressure gauge.

[0016] Furthermore, the activated carbon filter comprises:

[0017] a cylinder;

[0018] An upper sealing head is provided at the top end of the cylinder, and an air inlet of the activated carbon filter is provided on the upper sealing head;

[0019] A lower end cap is provided at the bottom end of the cylinder, and an air outlet of the activated carbon filter is provided on the lower end cap;

[0020] An activated carbon filler is arranged inside the cylinder and matches the shape of the cylinder cavity;

[0021] a supporting structure, which is arranged inside the lower head and is used to support the bottom of the activated carbon filler;

[0022] A fixing structure is arranged inside the upper head and is used to fix the top of the activated carbon filler.

[0023] Furthermore, the upper head and the lower head are respectively connected to the ends of the cylinder through flange components.

[0024] Furthermore, the support structure comprises:

[0025] a first lower perforated plate, the first lower perforated plate being provided with a plurality of regularly arranged first circular holes, and the first lower perforated plate being horizontally placed directly below the activated carbon filler, with the side edge of the first lower perforated plate being in contact with the inner wall of the lower head;

[0026] a second lower perforated plate, the second lower perforated plate being provided with a second circular hole corresponding to the first circular hole, the second lower perforated plate being horizontally arranged directly below the first lower perforated plate, a partition being provided between the second lower perforated plate and the first lower perforated plate, and two first through-holes being symmetrically provided on an edge of the second lower perforated plate, the side edge of the second lower perforated plate being in contact with the inner wall of the lower head;

[0027] a plurality of first microporous ceramic balls, each of which is sandwiched and fixed between the first circular hole and the second circular hole, with a portion of the first microporous ceramic ball exposed above the first circular hole and below the second circular hole, and the portion of the first microporous ceramic ball located above the first circular hole abutting against the bottom of the activated carbon filler;

[0028] A pair of screw rods, the two screw rods are vertically inserted into the first through holes on both sides respectively, the top ends of the screw rods are vertically fixed to the first lower orifice plate, and a first limiting nut is threadedly connected to the screw rods. The first limiting nut can be rotated to move the screw rods to limit and fix the second lower orifice plate and the first microporous ceramic ball;

[0029] A pair of sockets are respectively arranged in the inner wall of the lower head directly below the first through holes on both sides. A plug hole is opened on the top of the socket, and the bottom end of the screw is inserted into the plug hole.

[0030] Furthermore, the fixing structure includes:

[0031] a first upper perforated plate, the first upper perforated plate having a plurality of regularly arranged third circular holes, the first upper perforated plate being horizontally placed directly above the activated carbon filler, and having two second through-holes symmetrically formed on the edge of the first upper perforated plate, the side of the first upper perforated plate being in contact with the inner wall of the upper head;

[0032] a second upper perforated plate, the second upper perforated plate being provided with a fourth circular hole corresponding to the third circular hole, the second upper perforated plate being horizontally disposed directly above the first upper perforated plate, a partition being provided between the second upper perforated plate and the first upper perforated plate, and two third through-holes being symmetrically provided on the edge of the second upper perforated plate, the third through-holes being located directly above the second through-holes, and the side edge of the second upper perforated plate being in contact with the inner wall of the upper head;

[0033] a plurality of second microporous ceramic balls, each of which is sandwiched and fixed between the third circular hole and the fourth circular hole, with a portion of the second microporous ceramic ball exposed below the third circular hole and above the fourth circular hole, and the portion of the second microporous ceramic ball located below the third circular hole abutting against the top of the activated carbon filler;

[0034] A pair of bolts, the two bolts are vertically inserted into the second through-hole and the third through-hole on both sides respectively;

[0035] A pair of support plates, the two support plates are horizontally placed directly above the fourth circular holes on both sides, one side edge of the support plate is fixedly connected to the inner wall of the upper head, a fourth through-hole is defined on the support plate, a bolt is vertically passed through the fourth through-hole, and a top nut of the bolt overlaps the top of the support plate;

[0036] A spring is sleeved on each bolt, one end of the spring abuts against the bottom of the support plate, and the other end of the spring abuts against the top of the second upper hole plate. A second limiting nut is threadedly connected to the bottom end of each bolt, and the second limiting nut is used to fix the first upper hole plate and the second microporous ceramic ball.

[0037] The beneficial effects of the present invention are:

[0038] The removal system of the present invention achieves efficient removal of impurities in the raw gas by providing a raw gas filter, an activated carbon filter, and a dust filter, thereby solving the problem of ineffective removal of aerosols, avoiding foaming of the MDEA solution in the purification process and freezing and clogging of the cold box, greatly reducing production and operating costs and improving efficiency.

[0039] The present invention significantly improves the usability of the activated carbon filter by providing a new type of activated carbon filter. Its specific advantages are mainly reflected in the fact that the filter can be easily disassembled and maintained. The fixed structure added in the upper head and the supporting structure added in the lower head can better fix the activated carbon filler, while also meeting the needs of gas distribution and diffusion. The design of the microporous ceramic ball improves the adsorption effect of impurities in the gas and extends the service life of the activated carbon filler. The use of microporous ceramic balls also facilitates replacement and maintenance, and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0041] Figure 1 1 is a schematic structural diagram of an impurity removal system according to embodiment 1 of the present invention;

[0042] Figure 2 is a schematic structural diagram of an activated carbon filter according to Example 2 of the present invention;

[0043] Figure 3 yes Figure 2 Schematic diagram of the internal structure of the middle and lower heads;

[0044] Figure 4 yes Figure 2 Schematic diagram of the internal structure of the middle and upper heads;

[0045] Figure 5 yes Figure 3 Schematic diagram of the structure of the second lower orifice plate;

[0046] Figure 6 This is a structural diagram of another implementation of the support structure in Example 2 of the present invention;

[0047] Figure 7This is a structural diagram of another embodiment of the fixing structure in Example 2 of the present invention;

[0048] The following are marked in the figure:

[0049] 1. Raw gas filter;

[0050] 2. Activated carbon filter; 201. Cylinder; 202. Upper head; 203. Lower head; 204. Activated carbon filler; 205. Flange assembly; 206. Manhole; 207. Bracket;

[0051] 3. Dust filter;

[0052] 4. First pipeline; 401. First pressure gauge; 402. First valve; 5. Second pipeline; 501. Second valve; 502. Second pressure gauge; 503. Third pressure gauge; 504. Third valve; 6. Third pipeline; 601. Fourth valve; 602. Fourth pressure gauge; 603. Fifth pressure gauge; 604. Fifth valve; 7. Fourth pipeline; 701. Sixth valve; 702. Sixth pressure gauge;

[0053] 8. Support structure; 801. First lower orifice plate; 802. Second lower orifice plate; 8021. Second circular hole; 8022. First through-hole; 803. First microporous ceramic ball; 804. Screw; 805. First limiting nut; 806. Socket; 807. Third lower orifice plate; 808. Third microporous ceramic ball;

[0054] 9. Fixing structure; 901. First upper orifice plate; 902. Second upper orifice plate; 903. Second microporous ceramic ball; 904. Bolt; 905. Support plate; 906. Spring; 907. Second limiting nut; 908. Third upper orifice plate; 909. Fourth microporous ceramic ball;

[0055] 10. Differential pressure monitor. DETAILED DESCRIPTION

[0056] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Example 1

[0057] This embodiment proposes an impurity removal system to solve the adverse effects caused by the presence of wellhead natural gas aerosol, such as Figure 1 As shown, the system includes:

[0058] A raw gas filter 1, an activated carbon filter 2, a dust filter 3, a first pipe 4 connected to the air inlet of the raw gas filter 1, a second pipe 5 for connecting the air outlet of the raw gas filter 1 and the air inlet of the activated carbon filter 2, a third pipe 6 for connecting the air outlet of the activated carbon filter 2 and the air inlet of the dust filter 3, and a fourth pipe 7 connected to the air outlet of the dust filter 3.

[0059] Among them, a first pressure gauge 401 and a first valve 402 are installed in sequence on the first pipeline 4 along the direction of gas circulation; a second valve 501, a second pressure gauge 502, a third pressure gauge 503, and a third valve 504 are installed in sequence on the second pipeline 5 along the direction of gas circulation; a fourth valve 601, a fourth pressure gauge 602, a fifth pressure gauge 603, and a fifth valve 604 are installed in sequence on the third pipeline 6 along the direction of gas circulation; a sixth valve 701 and a sixth pressure gauge 702 are installed in sequence on the fourth pipeline 7 along the direction of gas circulation; in addition, the system is also provided with a differential pressure monitor 10, the two connection points of which are respectively located on the first pipeline 4 between the first pressure gauge 401 and the first valve 402, and on the fourth pipeline 7 between the sixth valve 701 and the sixth pressure gauge 702.

[0060] The system sets pressure gauges at the inlet and outlet of each filter device to detect the inlet and outlet pressures, and sets a differential pressure monitor between the first pipe 4 and the fourth pipe 7 to ensure the normal operation of the system.

[0061] The working principle of the wellhead natural gas aerosol impurity removal system of this embodiment is:

[0062] The wellhead natural gas enters the raw gas filter 1 through the first pipeline 4 and the first valve 402 for preliminary filtration, then enters the activated carbon filter 2 through the second valve 501, the second pipeline 5, and the third valve 504. After activated carbon adsorption filtration, it enters the mechanical filter through the fourth valve 601, the third pipeline 6, and the fifth valve 604. After filtration, it enters the next stage of processing through the sixth valve 701 and the fourth pipeline 7.

[0063] The function of the raw gas filter 1 is to carry out preliminary separation of impurities such as small stones, water, and oil in the raw gas coming out of the wellhead, so as to avoid affecting the subsequent processing of the raw gas.

[0064] The function of the activated carbon filter 2 is as follows: after the raw gas from the wellhead passes through the raw gas filter 1, some of the unremoved oil and dirt exists in the form of aerosols. If it is not treated, it will enter the subsequent links with the raw gas, causing the MDEA solution in the purification link to foam and the cold box to freeze and block. Moreover, after the MDEA solution foams, it is easy to enter the next link with the gas, resulting in solution loss and molecular sieve contamination.

[0065] The function of the dust filter 3 is: because the activated carbon dust present in the pre-activated carbon filter 2 will pass through the raw gas to the subsequent links and affect the operation of the subsequent equipment and the treatment effect of the raw gas, the dust filter 3 set up can remove the activated carbon dust in the raw gas. Example 2

[0066] Based on the above embodiment 1, this embodiment proposes a new type of activated carbon filter 2 structure, see Figure 2 As shown, the activated carbon filter 2 includes: a cylinder 201 located in the middle part, an upper head 202 and a lower head 203 arranged at the ends of the cylinder 201, an activated carbon filler 204 arranged inside the cylinder 201 and matching the shape of the cylinder cavity, and a supporting structure 8 arranged inside the lower head 203 for supporting the bottom of the activated carbon filler 204 and a fixing structure 9 arranged inside the upper head 202 for fixing the top of the activated carbon filler 204.

[0067] The activated carbon filter 2 has an air inlet located at the top of the upper end cap 202, and an air outlet located at the bottom of the lower end cap 203. Both the upper and lower end caps 202 and 203 are connected to the ends of the cylinder 201 via flange assemblies 205. A manhole 206 is provided on the side of the cylinder 201 as a safety emergency ventilation device. Furthermore, a bracket 207 is provided on the side of the cylinder 201 to support the activated carbon filter 2.

[0068] Based on the above embodiments, in some specific implementations, such as Figure 3 As shown, the support structure 8 located below the activated carbon filler 204 includes the following components:

[0069] A circular first lower perforated plate 801 having a plurality of regularly arranged first circular holes formed thereon. The first lower perforated plate 801 is horizontally placed directly below the activated carbon filler 204 , with the side of the first lower perforated plate 801 being in contact with the inner wall of the lower end cap 203 ;

[0070] A circular second lower hole plate 802, combined with Figure 5 As shown, the second lower perforated plate 802 is provided with a second circular hole 8021 corresponding to the first circular hole. The second lower perforated plate 802 is horizontally placed directly below the first lower perforated plate 801, with a partition layer between it and the first lower perforated plate 801. Two first through-holes 8022 are symmetrically provided on the side of the second lower perforated plate 802. The side of the second lower perforated plate 802 is in contact with the inner wall of the lower head 203.

[0071] Multiple first microporous ceramic balls 803 are clamped and fixed between the first circular hole and the second circular hole 8021. A portion of the first microporous ceramic ball 803 is exposed above the first circular hole and below the second circular hole 8021. The portion of the first microporous ceramic ball 803 located above the first circular hole abuts against the bottom of the activated carbon filler 204 to support the activated carbon filler 204.

[0072] A pair of screw rods 804, the two screw rods 804 are respectively vertically inserted into the first through holes 8022 on both sides, the top end of the screw rod 804 is vertically fixedly connected to the first lower hole plate 801, and a first limiting nut 805 is threadedly connected to the screw rod 804. Rotating the first limiting nut 805 can make it move on the screw rod 804, so as to limit and fix the second lower hole plate 802 and the first microporous ceramic ball 803.

[0073] A pair of sockets 806 are provided, respectively, in the inner wall of the lower head 203 directly below the first through-holes 8022 on both sides. A plug hole is provided on the top of the socket 806 , and the bottom end of the screw 804 is inserted into the plug hole.

[0074] As shown in the figure, the steps of disassembling and assembling the fixing structure 9 of this embodiment are as follows:

[0075] The first lower orifice plate 801, the first microporous ceramic ball 803 and the second lower orifice plate 802 are assembled into one body using the screw 804 and the first limiting nut 805 in the above manner, and then the bottom ends of the screws 804 on both sides are directly plugged into the sockets 806 on the corresponding sides to complete the installation of the fixed structure 9 into the lower head 203.

[0076] like Figure 4 As shown, the fixed structure 9 located above the activated carbon filler 204 includes the following components:

[0077] A circular first upper perforated plate 901 having a plurality of regularly arranged third circular holes formed thereon. The first upper perforated plate 901 is horizontally placed directly above the activated carbon filler 204 and has two second through-holes symmetrically formed on its sides. The side of the first upper perforated plate 901 is in contact with the inner wall of the upper head 202.

[0078] A circular second upper perforated plate 902 is provided with a fourth circular hole corresponding to the third circular hole. The second upper perforated plate 902 is horizontally placed directly above the first upper perforated plate 901, with a partition between the second upper perforated plate 902 and the first upper perforated plate 901. Two third through-holes are symmetrically provided on the side of the second upper perforated plate 902, and the third through-holes are located directly above the second through-holes. The side of the second upper perforated plate 902 is in contact with the inner wall of the upper head 202.

[0079] Multiple second microporous ceramic balls 903 are provided, and each second microporous ceramic ball 903 is clamped and fixed between the third circular hole and the fourth circular hole. A portion of the second microporous ceramic ball 903 is exposed below the third circular hole and above the fourth circular hole. The portion of the second microporous ceramic ball 903 located below the third circular hole abuts against the top of the activated carbon filler 204, and is used to fix the activated carbon filler 204.

[0080] A pair of bolts 904 are vertically inserted into the second through-hole and the third through-hole on both sides respectively.

[0081] A pair of support plates 905, the two support plates 905 are horizontally placed directly above the fourth circular holes on both sides, one side of the support plate 905 is fixedly connected to the inner wall of the upper head 202, and a fourth through-hole is defined on the support plate 905, a bolt 904 is vertically passed through the fourth through-hole, and the top nut of the bolt 904 overlaps the top of the support plate 905;

[0082] A spring 906 is sleeved on each bolt 904, one end of the spring 906 abuts against the bottom of the support plate 905, and the other end of the spring 906 abuts against the top of the second upper orifice plate 902. A second limiting nut 907 is threadedly connected to the bottom end of each bolt 904, and the second limiting nut 907 is used to fix the first upper orifice plate 901 and the second microporous ceramic ball 903.

[0083] As shown in the figure, the steps of disassembling and assembling the fixing structure 9 of this embodiment are as follows:

[0084] Installation of the fixing structure 9: first insert the bolt 904 from above the fourth through-hole on the support plate 905, then put the spring 906 on the bolt 904, assemble the first upper hole plate 901, the second microporous ceramic ball 903 and the second upper hole plate 902 together in the above manner, and then put the assembled parts through the second through-hole and the third through-hole on the bolt 904 at the bottom end of the spring 906, and finally connect the second limiting nut 907 to the bottom end of the bolt 904 to achieve the limiting fixation of the aforementioned assembled parts.

[0085] Among them, the setting of the spring 906 enables the fixed structure 9 to have the function of stretching up and down, and when the second microporous ceramic ball 903 abuts against the top of the activated carbon filler 204, the fixed structure 9 will automatically adapt and adjust; in addition, the setting of the spring 906 not only satisfies the convenient disassembly and assembly of the fixed structure 9, but also provides a reverse force to connect and assemble the first upper orifice plate 901, the second microporous ceramic ball 903 and the second upper orifice plate 902 into one.

[0086] Based on the above embodiments, in some specific implementations, a plurality of air holes may be provided on the first lower perforated plate 801 , the second lower perforated plate 802 , the first upper perforated plate 901 and the second upper perforated plate 902 .

[0087] Based on the above embodiments, in some specific implementations, such as Figure 6 As shown, in the support structure 8, a circular third lower orifice plate 807 can be further provided directly below the second lower orifice plate 802, and a partition is provided between the third lower orifice plate 807 and the second lower orifice plate 802. The third lower orifice plate 807 is provided with a plurality of regularly arranged fifth circular holes, and two fifth through-holes are symmetrically provided on the edge of the third lower orifice plate 807. The side of the third lower orifice plate 807 is just in contact with the inner wall of the lower head 203, and the second lower orifice plate 802 is provided with a sixth circular hole corresponding to the fifth circular hole, and a third microporous ceramic ball 808 is sandwiched and fixed between the fifth circular hole and the sixth circular hole, and a part of the third microporous ceramic ball 808 is exposed above the sixth circular hole and below the fifth circular hole. In this embodiment, the screw 804 is simultaneously penetrated by the fifth through-hole, and the first limiting nut 805 is limited and abutted against the bottom of the third lower orifice plate 807.

[0088] Similarly, if Figure 7 As shown, in the fixed structure 9, a circular third upper orifice plate 908 can be further provided directly below the first upper orifice plate 901, and a partition is provided between the third upper orifice plate 908 and the first upper orifice plate 901. The third upper orifice plate 908 is provided with a plurality of regularly arranged seventh circular holes, and two sixth through-holes are symmetrically provided on the edge of the third upper orifice plate 908. The side of the third upper orifice plate 908 is just in contact with the inner wall of the upper head 202, and the first upper orifice plate 901 is provided with an eighth circular hole corresponding to the seventh circular hole, and a fourth microporous ceramic ball 909 is sandwiched and fixed between the seventh circular hole and the eighth circular hole, and a part of the fourth microporous ceramic ball 909 is exposed below the seventh circular hole and above the eighth circular hole. In this embodiment, the part of the fourth microporous ceramic ball 909 located below the seventh circular hole abuts against the top of the activated carbon filler, the bolt 904 passes through the sixth through-hole, and the second limit nut 907 is limited and abuts against the bottom of the third upper orifice plate 908.

[0089] By adding a third lower orifice plate 807 and a third microporous ceramic ball 808 as well as a third upper orifice plate 908 and a fourth microporous ceramic ball 909, the thickness of the supporting structure 8 and the fixed structure 9 can be increased respectively, and the two designed structures are convenient for assembly and disassembly, and can further realize modular increase and decrease, and adjust and change the thickness of the supporting structure 8 and the fixed structure 9 to meet the gas distribution and diffusion requirements. The design of the microporous ceramic ball improves the adsorption effect of impurities in the gas, extends the service life of the activated carbon filler 204, and the use of microporous ceramic balls facilitates replacement and maintenance.

[0090] It should be noted that the above-mentioned microporous ceramic balls are inert ceramic balls with structural micropores with adsorption function set inside. Therefore, in addition to having the same performance and supporting strength as inert ceramic balls, they also have the functions of dispersing gas and liquid and adsorbing impurities.

[0091] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "top," "bottom," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly, for example, to mean fixedly connected, detachably connected, or integrally connected; mechanically connected, or circuitically connected; directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A wellhead natural gas aerosol impurity removal system, characterized in that: Include: a raw gas filter; an activated carbon filter; a dust filter; a first pipe connected to an air inlet of a raw gas filter; a second pipe, the two ends of which are respectively connected to the outlet of the raw gas filter and the inlet of the activated carbon filter; a third pipe, the two ends of which are respectively connected to the air outlet of the activated carbon filter and the air inlet of the dust filter; a fourth pipe connected to the dust filter outlet; The activated carbon filter comprises: a cylinder; An upper sealing head is provided at the top end of the cylinder, and an air inlet of the activated carbon filter is provided on the upper sealing head; A lower end cap is provided at the bottom end of the cylinder, and an air outlet of the activated carbon filter is provided on the lower end cap; An activated carbon filler is arranged inside the cylinder and matches the shape of the cylinder cavity; a supporting structure, which is arranged inside the lower head and is used to support the bottom of the activated carbon filler; a fixing structure, which is arranged inside the upper head and is used to fix the top of the activated carbon filler; The support structure comprises: a first lower perforated plate, the first lower perforated plate being provided with a plurality of regularly arranged first circular holes, and the first lower perforated plate being horizontally placed directly below the activated carbon filler, with the side edge of the first lower perforated plate being in contact with the inner wall of the lower head; a second lower perforated plate, the second lower perforated plate being provided with a second circular hole corresponding to the first circular hole, the second lower perforated plate being horizontally arranged directly below the first lower perforated plate, a partition being provided between the second lower perforated plate and the first lower perforated plate, and two first through-holes being symmetrically provided on an edge of the second lower perforated plate, the side edge of the second lower perforated plate being in contact with the inner wall of the lower head; a plurality of first microporous ceramic balls, each of which is sandwiched and fixed between the first circular hole and the second circular hole, with a portion of the first microporous ceramic ball exposed above the first circular hole and below the second circular hole, and the portion of the first microporous ceramic ball located above the first circular hole abutting against the bottom of the activated carbon filler; A pair of screw rods, the two screw rods are vertically inserted into the first through holes on both sides respectively, the top ends of the screw rods are vertically fixed to the first lower orifice plate, and a first limiting nut is threadedly connected to the screw rods. The first limiting nut can be rotated to move the screw rods to limit and fix the second lower orifice plate and the first microporous ceramic ball; A pair of sockets are respectively arranged in the inner wall of the lower head directly below the first through holes on both sides. A plug hole is opened on the top of the socket, and the bottom end of the screw is inserted into the plug hole.

2. The removal system according to claim 1, characterized in that A first pressure gauge and a first valve are installed in sequence on the first pipeline along the direction of gas flow; a second valve, a second pressure gauge, a third pressure gauge, and a third valve are installed in sequence on the second pipeline along the direction of gas flow; a fourth valve, a fourth pressure gauge, a fifth pressure gauge, and a fifth valve are installed in sequence on the third pipeline along the direction of gas flow; and a sixth valve and a sixth pressure gauge are installed in sequence on the fourth pipeline along the direction of gas flow.

3. The removal system according to claim 1, characterized in that Also includes: A pressure differential monitor, wherein two connection points of the pressure differential monitor are respectively located on the first pipeline between the first pressure gauge and the first valve, and on the fourth pipeline between the sixth valve and the sixth pressure gauge.

4. The removal system according to claim 1, characterized in that The upper sealing head and the lower sealing head are respectively connected to the cylinder openings at both ends of the cylinder through flange components.

5. The removal system according to claim 1, characterized in that The fixed structure comprises: a first upper perforated plate, the first upper perforated plate having a plurality of regularly arranged third circular holes, the first upper perforated plate being horizontally placed directly above the activated carbon filler, and having two second through-holes symmetrically formed on the edge of the first upper perforated plate, the side of the first upper perforated plate being in contact with the inner wall of the upper head; a second upper perforated plate, the second upper perforated plate being provided with a fourth circular hole corresponding to the third circular hole, the second upper perforated plate being horizontally arranged directly above the first upper perforated plate, a partition being provided between the second upper perforated plate and the first upper perforated plate, and two third through-holes being symmetrically provided on the edge of the second upper perforated plate, the third through-holes being located directly below the second through-holes, and the side edge of the second upper perforated plate being in contact with the inner wall of the upper head; a plurality of second microporous ceramic balls, each of which is sandwiched and fixed between the third circular hole and the fourth circular hole, with a portion of the second microporous ceramic ball exposed below the third circular hole and above the fourth circular hole, and the portion of the second microporous ceramic ball located below the third circular hole abutting against the top of the activated carbon filler; A pair of bolts, the two bolts are vertically inserted into the second through-hole and the third through-hole on both sides respectively; A pair of support plates, the two support plates are horizontally placed directly above the fourth circular holes on both sides, one side edge of the support plate is fixedly connected to the inner wall of the upper head, a fourth through-hole is defined on the support plate, a bolt is vertically passed through the fourth through-hole, and a top nut of the bolt overlaps the top of the support plate; A spring is sleeved on each bolt, one end of the spring abuts against the bottom of the support plate, and the other end of the spring abuts against the top of the second upper hole plate. A second limiting nut is threadedly connected to the bottom end of each bolt, and the second limiting nut is used to fix the first upper hole plate and the second microporous ceramic ball.

6. The removal system according to claim 5, characterized in that A plurality of air holes are formed on the first lower perforated plate, the second lower perforated plate, the first upper perforated plate and the second upper perforated plate.

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