A skid-mounted system for producing biomethane from biogas

Abstract

The present invention relates to the technical field of natural gas synthesis and processing, in particular to a skid-mounted system for producing bio-natural gas from biogas, which comprises a tower skid and a heat exchanger skid that are vertically arranged and connected; an absorption tower, a regeneration tower, an acid gas separator and an acid gas condenser are provided on the tower skid; an amine solution reboiler, an amine solution filter, an activated carbon filter, a condensate transfer pump, a lean amine pump and a rich-lean amine heat exchanger are provided on the lower platform of the heat exchanger skid; a condensate collection tank, an amine solution cooler and a natural gas filter are provided on the upper platform of the heat exchanger skid; the top of the activated carbon filter penetrates through the upper platform of the heat exchanger skid. By combining and installing the tower skid and the heat exchanger skid, the present invention can improve the utilization rate of the internal space of the skid-mounted device and facilitate freight transportation. In addition, after combining the tower skid and the heat exchanger skid, only a simple lifting device needs to be built on the topmost platform to realize the disassembly and maintenance operations of the two towers.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas synthesis and processing, and particularly to a skid-mounted system for producing bio-natural gas from biogas. Background Art

[0002] At present, the equipment for purifying biogas to produce natural gas usually adopts a skid-mounted method to realize the combined assembly of various equipment based on the requirements and trends of equipment integration, easy installation and movement, cost saving, and strong adaptability.

[0003] Among them, the skid-mounted equipment generally consists of two parts, namely a heat exchanger skid and a column skid. The main equipment in the heat exchanger skid is composed of an absorption tower, a regeneration tower, an acid gas condenser, and an acid gas separator. The main equipment in the column skid is composed of a rich and lean amine heat exchanger, an amine liquid cooler, an amine liquid reboiler, a lean amine pump, a condensate transfer pump, an amine liquid filter, an activated carbon filter, a natural gas filter, and a condensate collection tank.

[0004] During use, the heat exchanger skid and the column skid are respectively assembled, so it will occupy a large area. Moreover, due to the separate assembly, it is also necessary to install the respective maintenance and lifting equipment for the two towers during construction, increasing the use cost. Summary of the Invention

[0005] In view of the above problems existing in the above or prior art, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a skid-mounted system for producing bio-natural gas from biogas.

[0007] To solve the above technical problems, the present invention provides the following technical solution: A skid-mounted system for producing bio-natural gas from biogas, comprising a vertically arranged and connected column skid and a heat exchanger skid; an absorption tower, a regeneration tower, an acid gas separator, and an acid gas condenser are provided on the column skid; an amine liquid reboiler, an amine liquid filter, an activated carbon filter, a condensate transfer pump, a lean amine pump, and a rich and lean amine heat exchanger are provided on the lower platform of the heat exchanger skid; a condensate collection tank, an amine liquid cooler, and a natural gas filter are provided on the upper platform of the heat exchanger skid; the top of the activated carbon filter penetrates through the upper platform of the heat exchanger skid.

[0008] As a preferred solution of the skid-mounted system for producing bio-natural gas from biogas of the present invention, wherein: the natural gas filter includes a connection shell, and an inlet pipe and an outlet pipe respectively provided at both ends of the connection shell. A support body is provided on the connection shell, and further includes a filter body rotatably arranged in the connection shell, and a plurality of spiral filter tubes are circumferentially and arrayedly arranged inside the filter body.

[0009] As a preferred embodiment of the skid-mounted system for producing biomethane from biogas according to the present invention, the following is provided: The filter body includes a barrel body, a front panel provided at one end of the barrel body close to the inlet pipe, and a rear panel provided at one end of the barrel body close to the outlet pipe; A plurality of uniformly distributed discharge holes are provided on the spiral filter pipe.

[0010] As a preferred embodiment of the skid-mounted system for producing biomethane from biogas according to the present invention, the following is provided: The diameter of the spiral filter pipe gradually decreases from the end close to the front panel to the end close to the rear panel.

[0011] As a preferred embodiment of the skid-mounted system for producing biomethane from biogas according to the present invention, the following is provided: The diameter of the discharge holes on the spiral filter pipe gradually decreases from the end close to the front panel to the end close to the rear panel.

[0012] As a preferred embodiment of the skid-mounted system for producing biomethane from biogas according to the present invention, the following is provided: A closed area is provided on the outer wall of the end of the spiral filter pipe close to the front panel; A diversion cone is provided on the front panel.

[0013] As a preferred embodiment of the skid-mounted system for producing biomethane from biogas according to the present invention, the following is provided: An expanding channel, a receiving groove, and a reducing channel are sequentially connected inside the connection shell; A reducing blanking area communicating with the receiving groove is provided inside the connection shell; A blanking groove is provided on the surface of the barrel body.

[0014] As a preferred embodiment of the skid-mounted system for producing biomethane from biogas according to the present invention, the following is provided: End filter holes are provided on the rear panel, and side filter holes are provided on the outer wall of the end of the barrel body close to the rear panel.

[0015] As a preferred embodiment of the skid-mounted system for producing biomethane from biogas according to the present invention, the following is provided: A blanking channel, an expanding blanking area, and a collection groove are sequentially connected inside the support body, and the blanking channel is connected to the reducing blanking area; A sealing plate is provided on the support body.

[0016] As a preferred embodiment of the skid-mounted system for producing biomethane from biogas according to the present invention, the following is provided: A discharging mechanism is provided inside the support body; The discharging mechanism includes a screw sleeve rotatably provided inside the support body, and a screw rod threadedly connected to the inner wall of the screw sleeve. One end of the screw rod is provided with a lower piston; One end of the lower piston is provided with a connecting rod, one end of the connecting rod is provided with an upper piston, and a turntable is provided on the outer wall of the screw sleeve; The lower piston and the upper piston slide inside the blanking channel.

[0017] Advantages of the skid-mounted system for producing biomethane from biogas of the present invention: By integrating and installing the tower skid and the heat exchanger skid, the present invention can improve the utilization rate of the internal space of the skid, facilitating freight transportation. Additionally, after integrating the tower skid and the heat exchanger skid, only a simple hoisting device needs to be set up on the top platform to achieve the disassembly and maintenance operations of the two towers. Since the condensate collection tank is located on the upper platform, after being arranged at a raised height, the possibility of cavitation occurring in the condensate transfer pump can be reduced. The manhole of the activated carbon filter is placed on the lower platform and penetrates through the upper platform at the top, which can maximize the operational convenience of discharging and loading the activated carbon. Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is an overall schematic diagram of the skid-mounted system for producing biomethane from biogas.

[0020] Figure 2 It is a schematic diagram of the distribution state of the equipment on the lower platform of the skid-mounted system for producing biomethane from biogas.

[0021] Figure 3 It is a schematic diagram of the distribution state of the equipment on the upper platform of the skid-mounted system for producing biomethane from biogas.

[0022] Figure 4 It is a schematic diagram of the distribution state of the equipment on the bottom layer of the skid-mounted system for producing biomethane from biogas.

[0023] Figure 5 It is a schematic diagram of the distribution state of the equipment on the middle layer of the skid-mounted system for producing biomethane from biogas.

[0024] Figure 6 It is a schematic diagram of the distribution state of the equipment on the upper layer of the skid-mounted system for producing biomethane from biogas.

[0025] Figure 7 It is an overall structural schematic diagram of the natural gas filter.

[0026] Figure 8 It is a sectional structural schematic diagram of the natural gas filter.

[0027] Figure 9 It is a structural schematic diagram of the filter element of the natural gas filter.

[0028] Figure 10 It is a structural schematic diagram of the spiral filter tube of the natural gas filter.

[0029] Figure 11 It is a schematic structural diagram of the front panel of a natural gas filter.

[0030] Figure 12 It is a schematic structural diagram of the rear panel of a natural gas filter.

[0031] In the figure: 1. Tower skid; 2. Heat exchanger skid; 11. Bottom layer; 11a. Absorption tower; 11b. Regeneration tower; 12. Middle layer; 12a. Acid gas separator; 13. Upper layer; 13a. Acid gas condenser; 21. Lower platform; 21a. Amine solution reboiler; 21b. Amine solution filter; 21c. Activated carbon filter; 21d. Condensate transfer pump; 21e. Lean amine pump; 21f. Rich-lean amine heat exchanger; 22. Upper platform; 22a. Condensate collection tank; 22b. Amine solution cooler; 200. Natural gas filter; 201. Connection shell; 201a. Accommodating groove; 201b. Enlarged diameter channel; 201c. Reduced diameter channel; 201d. Reduced diameter blanking area; 202. Inlet pipe; 203. Discharge pipe; 204. Support body; 204a. Blanking channel; 204b. Enlarged diameter blanking area; 204c. Collection tank; 205. Filter body; 205a. Barrel body; 205b. Front panel; 205c. Rear panel; 205d. End filter holes; 205e. Side filter holes; 205f. Blanking groove; 205g. Flow guiding cone; 206. Spiral filter pipe; 206a. Discharge holes; 206b. Closed area; 207. Sealing plate; 208. Discharging mechanism; 208a. Screwed sleeve; 208b. Screw rod; 208c. Lower piston; 208d. Connecting rod; 208e. Upper piston; 208f. Turntable. Specific embodiments

[0032] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings of the specification.

[0033] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0034] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0035] Example 1, refer to Figures 1 to 6, which is the first embodiment of the present invention. This embodiment provides a skid-mounted system for producing biomethane from biogas, including a tower skid 1 and a heat exchanger skid 2 that are vertically arranged and connected. In this embodiment, the tower skid 1 and the heat exchanger skid 2 are combined and installed, which can improve the utilization rate of the internal space of the skid and facilitate freight transportation.

[0036] The tower skid 1 is provided with an absorption tower 11a, a regeneration tower 11b, an acid gas separator 12a, and an acid gas condenser 13a. In this embodiment, the tower skid 1 has at least three layers, which are the bottom layer 11, the middle layer 12, and the upper layer 13 from bottom to top. Among them, the absorption tower 11a and the regeneration tower 11b are arranged on the bottom layer 11, and their position distributions on the bottom layer 11 can be referred to Figure 4 , the absorption tower 11a and the regeneration tower 11b both penetrate through the middle layer 12 and the upper layer 13, the acid gas separator 12a is arranged on the middle layer 12 of the tower skid 1, and its position distribution on the middle layer 12 can be referred to Figure 5 , the acid gas condenser 13a is arranged on the upper layer 13 of the tower skid 1, and its position distribution on the upper layer 13 can be referred to Figure 6 .

[0037] On the lower platform 21 of the heat exchanger skid 2, there are an amine liquid reboiler 21a, an amine liquid filter 21b, an activated carbon filter 21c, a condensate transfer pump 21d, a lean amine pump 21e, and a rich-lean amine heat exchanger 21f. In this embodiment, the position distributions of the amine liquid reboiler 21a, the amine liquid filter 21b, the activated carbon filter 21c, the condensate transfer pump 21d, the lean amine pump 21e, and the rich-lean amine heat exchanger 21f on the lower platform 21 can be referred to Figure 2 .

[0038] On the upper platform 22 of the heat exchanger skid 2, there are a condensate collection tank 22a, an amine liquid cooler 22b, and a natural gas filter 200. In this embodiment, the position distributions of the condensate collection tank 22a, the amine liquid cooler 22b, and the natural gas filter 200 on the upper platform 22 can be referred to Figure 3 .

[0039] It should be noted that the top of the activated carbon filter 21c penetrates through the upper platform 22 of the heat exchanger skid 2.

[0040] It should be noted that the compositions of the tower skid 1 and the heat exchanger skid 2 in this system have not changed compared with the prior art, and no changes have been made to the working principle and process of the entire system. Therefore, the connection relationships and working principles between the devices will not be elaborated here.

[0041] The differences are as follows: Since the tower skid 1 and the heat exchanger skid 2 are combined and installed, the utilization rate of the internal space of the skid can be improved, which is convenient for freight transportation. In addition, after the tower skid 1 and the heat exchanger skid 2 are combined, only a simple lifting device needs to be built on the top platform to realize the disassembly and maintenance operations of the two towers. Since the condensate collection tank 22a is arranged on the upper platform 22, after being arranged at a raised height, the possibility of cavitation of the condensate transfer pump 21d can be reduced. The manhole of the activated carbon filter 21c is placed on the lower platform 21 and penetrates through the upper platform 22 at the top, which can maximize the operational convenience of discharging and filling the activated carbon.

[0042] Example 2, referring to Figures 7 to 12 , which is the second embodiment of the present invention. Different from the previous embodiment, the natural gas filter 200 includes a connection shell 201, an inlet pipe 202 and an outlet pipe 203 respectively arranged at both ends of the connection shell 201. A support body 204 is arranged on the connection shell 201, and further includes a filter body 205 rotatably arranged in the connection shell 201. A plurality of spiral filter pipes 206 are arranged in a circumferential array inside the filter body 205. In this embodiment, the support body 204, the connection shell 201, the inlet pipe 202 and the outlet pipe 203 together form a T-shaped structure. Natural gas enters the connection shell 201 through the inlet pipe 202 and is discharged from the outlet pipe 203 after being filtered by the filter body 205 and the spiral filter pipes 206.

[0043] Specifically, the filter body 205 includes a barrel body 205a, a front panel 205b arranged at one end of the barrel body 205a close to the inlet pipe 202, and a rear panel 205c arranged at one end of the barrel body 205a close to the outlet pipe 203; in this embodiment, an end filter hole 205d is arranged on the rear panel 205c, and a side filter hole 205e is arranged on the outer wall of one end of the barrel body 205a close to the rear panel 205c.

[0044] Preferably, a plurality of discharge holes 206a are evenly distributed on the spiral filter pipe 206.

[0045] Furthermore, the diameter of the spiral filter pipe 206 gradually decreases from the end close to the front panel 205b to the end close to the rear panel 205c.

[0046] The diameter of the discharge holes 206a on the spiral filter pipe 206 gradually decreases from the end close to the front panel 205b to the end close to the rear panel 205c.

[0047] A closed area 206b is arranged on the outer wall of one end of the spiral filter pipe 206 close to the front panel 205b; a diversion cone 205g is arranged on the front panel 205b.

[0048] The remaining structures are the same as those in Embodiment 1.

[0049] Due to the arrangement of the spiral filter tube 206, when natural gas passes through, it can flow along the inside of the spiral filter tube 206. The arrangement of the front panel 205b enables natural gas to only enter the spiral filter tube 206 for circulation. The flow guide cone 205g can guide the air flow to facilitate the air flow to enter the spiral filter tube 206. Moreover, due to the spiral arrangement of the spiral filter tube 206, it can drive the barrel 205a to rotate when the gas flows. The barrel 205a and the connecting shell 201 are connected by a sealed bearing. And, since a closed area 206b is provided at the front end of the spiral filter tube 206, it can ensure that a thrust is generated when the gas flows through the spiral filter tube 206 to rotate the barrel 205a, and it will not cause the barrel 205a to fail to rotate due to the arrangement of the discharge holes 206a.

[0050] In addition, since the starting port diameter of the spiral filter tube 206 is large and the end port diameter is small, it is easier for gas to enter the inside of the spiral filter tube 206. After the diameter is reduced, the channel area decreases, and the flow rate of the gas will increase when it circulates. Due to the spiral arrangement of the spiral filter tube 206, the resistance is small when the gas flows and contacts the inner wall of the spiral filter tube 206. The impurities in the gas will also accelerate due to the increase in flow rate. Moreover, the impurities have a relatively large mass and inertia compared to the gas. And when the impurities move in the spiral filter tube 206, the resistance when contacting the inner wall of the spiral filter tube 206 is large. With the spiral arrangement of the spiral filter tube 206, the impurities are likely to collide with or stick to the surface of the spiral filter tube 206 and move, and the impurities can more easily enter the discharge holes 206a and rush out of the discharge holes 206a into the barrel 205a, realizing the separation of gas and impurities. Since the impurities will be discharged through the discharge holes 206a along with the gas flow, the spiral filter tube 206 will not be blocked. And since the end port diameter of the spiral filter tube 206 is small and the gas flow rate is fast, it is not easy to accumulate impurities at the end either, and the impurities usually cannot move to the end.

[0051] Since the diameter of the discharge holes 206a gradually decreases, the leakage area of the spiral filter tube 206 can be gradually reduced to ensure the gas flow rate. And when the gas flows in the spiral filter tube 206, it will also exhaust gas through the discharge holes 206a. Therefore, it can assist the impurities to be ejected from the spiral filter tube 206. The arrangement of the side filter holes 205e and the end filter holes 205d facilitates the gas flow in the barrel 205a and also facilitates the gas to enter the barrel 205a from the spiral filter tube 206 through the discharge holes 206a.

[0052] At the same time, since the barrel 205a is in a rotating state when the gas flows, it can also assist in discharging the impurities in the spiral filter tube 206, the position of the discharge holes 206a can be changed according to the rotation, and the rotation can prevent impurities from adhering to the surface of the spiral filter tube 206.

[0053] Example 3, refer to Figures 7 to 12, which is the third embodiment of the present invention. Different from the previous embodiment, a gradually expanding channel 201b, a receiving groove 201a, and a gradually narrowing channel 201c are sequentially arranged in the connecting shell 201. In this embodiment, the arrangement of the gradually expanding channel 201b and the guiding cone 205g can assist in guiding the gas, facilitating the gas to flow into the spiral filter tube 206. The barrel 205a is rotatably arranged in the receiving groove 201a, and the arrangement of the gradually narrowing channel 201c facilitates guiding the gas to flow into the discharge pipe 203.

[0054] A gradually narrowing blanking area 201d communicating with the receiving groove 201a is arranged in the connecting shell 201; a blanking groove 205f is arranged on the surface of the barrel 205a. In this embodiment, impurities falling into the barrel 205a can be discharged through the blanking groove 205f. With the rotation of the barrel 205a, it can assist the impurities to fall from the blanking groove 205f, preventing the impurities from accumulating in the barrel 205a.

[0055] Furthermore, a blanking channel 204a, a gradually expanding blanking area 204b, and a collection groove 204c are sequentially arranged in the support 204, and the blanking channel 204a is connected to the gradually narrowing blanking area 201d. In this embodiment, the arrangements of the blanking channel 204a, the gradually expanding blanking area 204b, and the collection groove 204c facilitate guiding the falling and collection of impurities.

[0056] Preferably, a sealing plate 207 is arranged on the support 204. In this embodiment, the sealing plate 207 is fixedly connected to the support 204 by screws. When cleaning the impurities, the sealing plate 207 is opened, and the impurities stored in the collection groove 204c are taken out.

[0057] All the other structures are the same as those in Embodiment 2.

[0058] Embodiment 4, referring to Figures 7 to 12 , which is the fourth embodiment of the present invention. Different from the previous embodiment, a discharging mechanism 208 is arranged in the support 204; the discharging mechanism 208 includes a screw sleeve 208a rotatably arranged in the support 204, and a screw rod 208b threadedly connected to the inner wall of the screw sleeve 208a. One end of the screw rod 208b is provided with a lower piston 208c; one end of the lower piston 208c is provided with a connecting rod 208d, one end of the connecting rod 208d is provided with an upper piston 208e, and a turntable 208f is arranged on the outer wall of the screw sleeve 208a. In this embodiment, the lower piston 208c and the upper piston 208e slide in the blanking channel 204a, and the distance between the bottom end of the lower piston 208c and the top end of the upper piston 208e is equal to or less than the length of the blanking channel 204a. When rotating the turntable 208f to drive the upper piston 208e and the lower piston 208c to slide, at least one piston is located in the blanking channel 204a to achieve sealing.

[0059] All the other structures are the same as those in Embodiment 3.

[0060] During use, the necking setting of the necking blanking area 201d can facilitate the dropping of impurities. During cleaning, the sealing plate 207 is opened, and the turntable 208f is rotated to raise the screw rod 208b. The upper piston 208e and the lower piston 208c rise simultaneously until the upper piston 208e disengages from the blanking channel 204a and the lower piston 208c blocks the blanking channel 204a. The impurities can fall into the blanking channel 204a and be located above the lower piston 208c. After the impurities fall into the blanking channel 204a, the turntable 208f is rotated again to lower the screw rod 208b. The upper piston 208e enters the blanking channel 204a for blocking, and the lower piston 208c disengages from the blanking channel 204a. The impurities fall into the collection tank 204c. At this time, cleaning can be carried out to ensure that natural gas will not leak during cleaning, and the system does not need to stop. After cleaning, the upper piston 208e and the lower piston 208c are used to seal the blanking channel 204a simultaneously to ensure the sealing performance. In cooperation with the sealing plate 207 for further sealing, natural gas leakage can be avoided. It should be noted that the top and bottom of the upper piston 208e and the lower piston 208c are both tapered to facilitate the dropping of impurities.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A biogas-to-biogas skid-mounted system, characterized by: It comprises a tower skid (1) and a heat exchanger skid (2) which are vertically arranged and connected; The tower skid (1) is provided with an absorption tower (11a), a regeneration tower (11b), an acid gas separator (12a) and an acid gas condenser (13a); An amine liquid reboiler (21a), an amine liquid filter (21b), an activated carbon filter (21c), a condensate delivery pump (21d), a lean amine pump (21e) and a lean-rich amine heat exchanger (21f) are provided on the lower platform (21) of the heat exchanger skid (2); The upper platform (22) of the heat exchanger skid (2) is provided with a condensate collection tank (22a), an amine liquid cooler (22b) and a natural gas filter (200); The top of the activated carbon filter (21c) passes through the upper platform (22) of the heat exchanger skid (2); The natural gas filter (200) comprises a connecting shell (201), and an inlet pipe (202) and an outlet pipe (203) respectively arranged at two ends of the connecting shell (201); a support body (204) is arranged on the connecting shell (201), and further comprises a filter body (205) rotatably arranged in the connecting shell (201); a plurality of spiral filter tubes (206) are arranged in an array on the inner circumference of the filter body (205); The filter body (205) comprises a barrel body (205a) and a front panel (205b) arranged at one end of the barrel body (205a) close to the inlet pipe (202), wherein the arrangement of the front panel (205b) allows natural gas to flow only into the spiral filter tube (206), and further comprises a rear panel (205c) arranged at one end of the barrel body (205a) close to the outlet pipe (203); The spiral filter tube (206) is provided with a plurality of evenly distributed discharge holes (206a); The diameter of the spiral filter tube (206) from one end close to the front panel (205b) to the diameter of the spiral filter tube (206) from one end close to the rear panel (205c) is in a state of gradually decreasing; A closed area (206b) is provided on the outer wall of one end of the spiral filter tube (206) close to the front panel (205b). Since the closed area (206b) is provided at the front end of the spiral filter tube (206), it is ensured that when the gas flows through the spiral filter tube (206), thrust can be generated to rotate the barrel body (205a).

2. The biogas-to-biogas skid-mounted system according to claim 1, characterized in that: The diameter of the discharge hole (206a) on the spiral filter tube (206) gradually decreases from an end close to the front panel (205b) to an end close to the rear panel (205c).

3. The biogas-to-biogas skid-mounted system according to claim 2, characterized in that: The front panel (205b) is provided with a guide cone (205g).

4. The biogas-to-biogas skid-mounted system according to any one of claims 1 to 3, characterized in that: The connection shell (201) is provided with an enlarging channel (201b), a containing groove (201a), and a reducing channel (201c) which are connected in sequence; The connection shell (201) is provided with a reduced diameter blanking area (201d) which is connected to the accommodating groove (201a); A material dropping groove (205f) is provided on the surface of the barrel body (205a).

5. The biogas-to-biogas skid-mounted system according to claim 4, characterized in that: The rear panel (205c) is provided with an end filter hole (205d), and the outer wall of one end of the barrel body (205a) close to the rear panel (205c) is provided with a side filter hole (205e).

6. The biogas-to-biogas skid-mounted system according to claim 5, characterized in that: The support body (204) is provided with a material dropping channel (204a), a diameter-expanding material dropping area (204b), and a collecting trough (204c) which are connected in sequence, and the material dropping channel (204a) is connected to the diameter-reducing material dropping area (201d); A sealing plate (207) is provided on the support body (204).

7. The biogas-to-biogas skid-mounted system according to claim 6, characterized in that: A discharge mechanism (208) is provided in the support body (204); The unloading mechanism (208) comprises a screw sleeve (208a) rotatably arranged in the support body (204), and a screw rod (208b) threadedly connected to the inner wall of the screw sleeve (208a), and a lower piston (208c) is provided at one end of the screw rod (208b); A connecting rod (208d) is provided at one end of the lower piston (208c), an upper piston (208e) is provided at one end of the connecting rod (208d), and a rotating disk (208f) is provided on the outer wall of the screw sleeve (208a); The lower piston (208c) and the upper piston (208e) are slidably disposed in the material dropping channel (204a).

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