Skid-mounted system for preparing biogas from biogas

Abstract

The invention relates to the technical field of natural gas synthesis processing, in particular to a skid-mounted system for preparing biogas from biogas, which comprises a tower pry and a heat exchanger pry which are vertically arranged and connected with each other, an absorption tower, a regeneration tower, an acid gas separator and an acid gas condenser are arranged on the tower pry; an amine liquid reboiler, an amine liquid filter, an activated carbon filter, a condensate delivery pump, a lean amine pump and a lean and rich amine heat exchanger are arranged on a lower platform of the heat exchanger pry; a condensate collecting tank, an amine liquid cooler and a natural gas filter are arranged on an upper platform of the heat exchanger pry; the tower pry and the heat exchanger pry are installed in a combined mode, so that the utilization rate of the internal space of the pry can be increased, and freight transportation is facilitated; and the disassembly and maintenance operation of the two towers can be realized only by building a simple lifting device on the uppermost platform.

Description

Technical Field

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

[0002] At present, the equipment for purifying biogas to prepare natural gas is usually assembled in a skid-mounted manner based on the demand trends such as equipment integration, easy installation and movement, cost savings, and strong adaptability.

[0003] Among them, the skid-mounted equipment is generally composed of two parts, namely the heat exchanger skid and the tower 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 tower skid is composed of a lean and rich 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] When in use, the heat exchanger skid and the tower skid are assembled separately, thus occupying a larger area. Furthermore, since they are assembled separately, it is also necessary to install respective maintenance and hoisting equipment for the two towers during construction, thus increasing the use cost. Summary of the invention

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

[0006] Therefore, an object of the present invention is to provide a skid-mounted system for producing biogas from methane.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a biogas-to-biogas skid-mounted system, comprising a tower skid and a heat exchanger skid arranged vertically and connected to each other; the tower skid is provided with an absorption tower, a regeneration tower, an acid gas separator and an acid gas condenser; an amine liquid reboiler, an amine liquid filter, an activated carbon filter, a condensate delivery pump, a lean amine pump and a lean-rich 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; and the top of the activated carbon filter passes through the upper platform of the heat exchanger skid.

[0008] As a preferred solution of the biogas-to-biogas skid-mounted system of the present invention, the natural gas filter includes a connecting shell, and an inlet pipe and an outlet pipe respectively arranged at both ends of the connecting shell, the connecting shell is provided with a support body, and also includes a filter body rotatably arranged in the connecting shell, and a plurality of spiral filter tubes are arranged in a circumferential array in the filter body.

[0009] As a preferred solution of the biogas-to-biogas skid-mounted system of the present invention, the filter body includes a barrel body, and a front panel arranged at one end of the barrel body close to the inlet pipe, and also includes a rear panel arranged at one end of the barrel body close to the discharge pipe; the spiral filter tube is provided with a plurality of evenly distributed discharge holes.

[0010] As a preferred solution of the biogas-to-biogas skid-mounted system of the present invention, the diameter of the spiral filter tube gradually decreases from the end close to the front panel to the end close to the rear panel.

[0011] As a preferred solution of the biogas-to-biogas skid-mounted system of the present invention, the diameter of the discharge hole on the spiral filter tube gradually decreases from the end close to the front panel to the end close to the rear panel.

[0012] As a preferred solution of the biogas-to-biogas skid-mounted system of the present invention, a closed area is provided on the outer wall of one end of the spiral filter tube close to the front panel; and a guide cone is provided on the front panel.

[0013] As a preferred solution of the biogas-to-biogas skid-mounted system of the present invention, wherein: the connecting shell is provided with an expansion channel, a receiving groove, and a reduction channel connected in sequence; the connecting shell is provided with a reduction blanking area connected to the receiving groove; and the surface of the barrel body is provided with a blanking groove.

[0014] As a preferred solution of the biogas-to-biogas skid-mounted system of the present invention, the rear panel is provided with end filter holes, and the outer wall of one end of the barrel body close to the rear panel is provided with side filter holes.

[0015] As a preferred solution of the biogas-to-biogas skid-mounted system of the present invention, the support body is provided with a material dropping channel, an expanded material dropping area, and a collecting trough connected in sequence, and the material dropping channel is connected to the reduced material dropping area; a sealing plate is provided on the support body.

[0016] As a preferred solution of the biogas-to-biogas skid-mounted system of the present invention, wherein: a discharge mechanism is provided in the support body; the discharge mechanism includes a sleeve rotatably arranged in the support body, and a screw threadedly connected to the inner wall of the sleeve, one end of the screw 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 the outer wall of the sleeve is provided with a turntable; the lower piston and the upper piston are slidably arranged in the blanking channel.

[0017] Beneficial effects of the biogas-to-biogas skid-mounted system of the present invention: the present invention can improve the utilization rate of the skid-mounted internal space by combining the tower skid and the heat exchanger skid for installation, which is convenient for freight transportation. In addition, after the tower skid and the heat exchanger skid are combined, it is only necessary to build a simple lifting device on the uppermost platform to realize the disassembly and maintenance of the two towers. Since the condensate collection tank is arranged on the upper platform, the possibility of cavitation of the condensate delivery pump can be reduced after the elevated arrangement. The hand hole of the activated carbon filter is placed on the lower platform, and the top passes through the upper platform, which can maximize the operational convenience of unloading and loading the activated carbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 This is the overall schematic diagram of the biogas-to-biogas skid-mounted system.

[0020] Figure 2 This is a schematic diagram of the lower platform equipment distribution status of the biogas-to-biogas skid-mounted system.

[0021] Figure 3 This is a schematic diagram of the upper platform equipment distribution status of the biogas-to-biogas skid-mounted system.

[0022] Figure 4 This is a schematic diagram of the distribution of the underlying equipment of the biogas-to-biogas skid-mounted system.

[0023] Figure 5 This is a schematic diagram of the distribution of the middle-level equipment in the biogas-to-biogas skid-mounted system.

[0024] Figure 6 This is a schematic diagram of the distribution of upper equipment in the biogas-to-biogas skid-mounted system.

[0025] Figure 7 Schematic diagram of the overall structure of the natural gas filter.

[0026] Figure 8 Schematic diagram of the cross-sectional structure of a natural gas filter.

[0027] Fig. 9 It is a schematic diagram of the structure of the filter body of the natural gas filter.

[0028] Fig.10 Schematic diagram of the structure of the spiral filter tube of the natural gas filter.

[0029] Fig.11 A schematic diagram of the structure of the front panel of the natural gas filter.

[0030] Fig.12 A schematic diagram of the structure of the rear panel of the 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 liquid reboiler; 21b, amine liquid filter; 21c, activated carbon filter; 21d, condensate delivery pump; 21e, lean amine pump; 21f, lean and rich amine heat exchanger; 22, upper platform; 22a, condensate collection tank; 22b, amine liquid cooler; 200, natural gas filter; 201, connecting shell; 201a, containing tank; 201b, expansion channel; 201c, reduction channel; 201d, reduction blanking Area; 202, inlet pipe; 203, discharge pipe; 204, support body; 204a, material dropping channel; 204b, expanded diameter material dropping area; 204c, collecting trough; 205, filter body; 205a, barrel; 205b, front panel; 205c, rear panel; 205d, end filter hole; 205e, side filter hole; 205f, material dropping trough; 205g, guide cone; 206, spiral filter tube; 206a, discharge hole; 206b, closed area; 207, sealing plate; 208, unloading mechanism; 208a, screw sleeve; 208b, screw; 208c, lower piston; 208d, connecting rod; 208e, upper piston; 208f, turntable. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] Example 1, reference Figures 1 to 6, which is the first embodiment of the present invention, provides a biogas-to-biogas skid-mounted system, 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 installed together, which can improve the utilization rate of the skid-mounted internal space 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 is provided with at least three layers, which are a bottom layer 11, a middle layer 12 and an upper layer 13 from bottom to top. The absorption tower 11a and the regeneration tower 11b are provided on the bottom layer 11. The position distribution of the absorption tower 11a and the regeneration tower 11b on the bottom layer 11 can be referred to. Figure 4 The absorption tower 11a and the regeneration tower 11b are both arranged 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. The position distribution of the acid gas separator 12a in 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. The position distribution of the acid gas condenser 13a on the upper layer 13 can be referred to Figure 6 .

[0037] The lower platform 21 of the heat exchanger skid 2 is provided with 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; in this embodiment, the position distribution of the amine liquid reboiler 21a, the amine liquid filter 21b, the activated carbon filter 21c, the condensate delivery pump 21d, the lean amine pump 21e and the lean-rich amine heat exchanger 21f on the lower platform 21 can refer to Figure 2 .

[0038] The upper platform 22 of the heat exchanger skid 2 is provided with a condensate collecting tank 22a, an amine liquid cooler 22b and a natural gas filter 200; in this embodiment, the position distribution of the condensate collecting tank 22a, the amine liquid cooler 22b and the natural gas filter 200 on the upper platform 22 can refer to Figure 3 .

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

[0040] It should be noted that the composition of the tower skid 1 and the heat exchanger skid 2 in this system has not changed compared with the prior art, and no changes have been made to the working principle and process of the entire system, so the connection relationship and working principle between the equipment will not be repeated.

[0041] The differences are as follows: since the tower skid 1 and the heat exchanger skid 2 are installed together, the utilization rate of the skid-mounted internal space can be improved, which is convenient for freight transportation. In addition, after the tower skid 1 and the heat exchanger skid 2 are combined, it is only necessary to build a simple lifting device on the uppermost platform to realize the disassembly and maintenance of the two towers. Since the condensate collection tank 22a is arranged on the upper platform 22, the possibility of cavitation of the condensate delivery pump 21d can be reduced after the elevated arrangement. The hand hole of the activated carbon filter 21c is placed on the lower platform 21, and the top passes through the upper platform 22, which can maximize the operational convenience of unloading and loading the activated carbon.

[0042] Example 2, reference Figure 7 to Figure 12 , which is the second embodiment of the present invention. Different from the previous embodiment, the natural gas filter 200 includes a connecting shell 201, and an inlet pipe 202 and an outlet pipe 203 respectively arranged at both ends of the connecting shell 201. The connecting shell 201 is provided with a support body 204, and also includes a filter body 205 rotatably arranged in the connecting shell 201. A plurality of spiral filter tubes 206 are arranged in a circumferential array in the filter body 205. In this embodiment, the support body 204, the connecting shell 201, the inlet pipe 202 and the outlet pipe 203 form a T-shaped structure as a whole. Natural gas enters the connecting shell 201 through the inlet pipe 202, and is filtered by the filter body 205 and the spiral filter tube 206 and discharged from the outlet pipe 203.

[0043] Specifically, the filter body 205 includes a barrel body 205a, and a front panel 205b arranged at one end of the barrel body 205a close to the inlet pipe 202, and also includes 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 provided on the rear panel 205c, and a side filter hole 205e is provided on the outer wall of one end of the barrel body 205a close to the rear panel 205c.

[0044] Preferably, the spiral filter tube 206 is provided with a plurality of evenly distributed discharge holes 206 a .

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

[0046] The diameter of the discharge hole 206a on the spiral filter tube 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 provided on the outer wall of one end of the spiral filter tube 206 close to the front panel 205b; a guide cone 205g is provided on the front panel 205b.

[0048] The rest of the structure is the same as that of Example 1.

[0049] Due to the setting of the spiral filter tube 206, the natural gas can flow along the inside of the spiral filter tube 206 when passing through. The setting of the front panel 205b allows the natural gas to circulate only in the spiral filter tube 206. The guide cone 205g can guide the airflow to facilitate the airflow to enter the spiral filter tube 206. In addition, due to the spiral setting of the spiral filter tube 206, the barrel body 205a can be pushed to rotate when the gas flows. The barrel body 205a and the connecting shell 201 are connected by a sealed bearing. In addition, since a closed area 206b is provided at the front end of the spiral filter tube 206, it can be ensured that the gas can generate thrust for the barrel body 205a to rotate when flowing through the spiral filter tube 206, and the barrel body 205a will not be unable to rotate due to the setting of the discharge hole 206a.

[0050] In addition, since the starting port diameter of the spiral filter tube 206 is large and the terminal diameter is small, the gas can more easily enter the spiral filter tube 206. After the diameter is reduced, the channel area is reduced, and the flow rate of the gas will increase. Due to the spiral setting of the spiral filter tube 206, the resistance when the gas flows and contacts the inner wall of the spiral filter tube 206 is small. The impurities in the gas will also be accelerated due to the increase in flow rate. The impurities have a larger mass and inertia relative to the gas. When the impurities move in the spiral filter tube 206, the resistance when they contact the inner wall of the spiral filter tube 206 is large. Due to the spiral setting of the spiral filter tube 206, impurities can easily collide with or stick to the surface of the spiral filter tube 206 and move, so the impurities can more easily enter the discharge hole 206a and rush out from the discharge hole 206a into the barrel body 205a, thereby realizing the separation of gas and impurities. Since the impurities will be discharged through the discharge hole 206a along with the flow of gas, there will be no blockage in the spiral filter tube 206. In addition, the end of the spiral filter tube 206 has a small diameter and a fast gas flow rate, so it is not easy for impurities to accumulate at the end, and impurities usually cannot move to the end.

[0051] As the diameter of the discharge hole 206a gradually decreases, the leakage area of ​​the spiral filter tube 206 can be gradually reduced to ensure the gas flow rate. When the gas flows in the spiral filter tube 206, it will also be exhausted through the discharge hole 206a, so it can assist impurities to be ejected from the spiral filter tube 206. The setting of the side filter holes 205e and the end filter holes 205d facilitates the flow of gas in the barrel body 205a, and also facilitates the gas to enter the barrel body 205a from the spiral filter tube 206 through the discharge hole 206a.

[0052] At the same time, since the barrel body 205a is in a rotating state when the gas flows, it can also assist in the discharge of impurities in the spiral filter tube 206. The position of the discharge hole 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, reference Figure 7 to Figure 12, which is the third embodiment of the present invention. Different from the previous embodiment, the connecting shell 201 is provided with an expanding channel 201b, a containing groove 201a, and a reducing channel 201c which are connected in sequence; in this embodiment, the setting of the expanding channel 201b and the guide cone 205g can assist in guiding the gas, so that the gas flows into the spiral filter tube 206, the barrel body 205a is rotatably arranged in the containing groove 201a, and the setting of the reducing channel 201c facilitates guiding the gas to flow into the discharge pipe 203.

[0054] A reduced diameter blanking area 201d connected to the accommodating groove 201a is provided in the connecting shell 201; a blanking groove 205f is provided on the surface of the barrel body 205a; in this embodiment, impurities fall into the barrel body 205a and can be discharged through the blanking groove 205f. The rotation of the barrel body 205a can assist the impurities to fall from the blanking groove 205f, thereby avoiding the accumulation of impurities in the barrel body 205a.

[0055] Furthermore, the support body 204 is provided with a material dropping channel 204a, an expanded diameter material dropping area 204b, and a collecting groove 204c which are connected in sequence, and the material dropping channel 204a and the reduced diameter material dropping area 201d are connected; in this embodiment, the setting of the material dropping channel 204a, the expanded diameter material dropping area 204b, and the collecting groove 204c facilitates the guidance of the falling and collection of impurities.

[0056] Preferably, a sealing plate 207 is provided on the support body 204. In the present embodiment, the sealing plate 207 is fixedly connected to the support body 204 by screws. When cleaning impurities, the sealing plate 207 is opened to take out the impurities stored in the collecting tank 204c.

[0057] The rest of the structure is the same as that of Example 2.

[0058] Example 4, reference Figure 7 to Figure 12 , which is the fourth embodiment of the present invention. Different from the previous embodiment, a discharge mechanism 208 is provided in the support body 204; the discharge mechanism 208 includes 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, and an upper piston 208e is provided at one end of the connecting rod 208d, and a turntable 208f is provided on the outer wall of the screw sleeve 208a; in this embodiment, the lower piston 208c and the upper piston 208e are slidably arranged 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, and when the turntable 208f is rotated to make the screw rod 208b 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 blocking.

[0059] The rest of the structure is the same as that of Example 3.

[0060] When in use, the reduced diameter setting of the reduced diameter blanking area 201d can facilitate the falling of impurities. When cleaning, open the sealing plate 207, rotate the turntable 208f to make the screw 208b rise, and the upper piston 208e and the lower piston 208c rise at the same time until the upper piston 208e is separated from the blanking channel 204a, and the lower piston 208c blocks the blanking channel 204a, and the impurities can fall into the blanking channel 204a and are located above the lower piston 208c. After the impurities fall into the blanking channel 204a, the turntable 208f is rotated again to make the screw 208b descend, and the upper piston 208e enters The material drop channel 204a is blocked, and the lower piston 208c is separated from the material drop channel 204a, and impurities fall into the collecting tank 204c. Cleaning is performed at this time to ensure that natural gas will not leak during cleaning, and the system does not need to be shut down. After cleaning, the upper piston 208e and the lower piston 208c are used to seal the material drop channel 204a at the same time to ensure the sealing performance, and the upper sealing plate 207 is used for further sealing to avoid natural gas leakage. It should be noted that the top and bottom ends of the upper piston 208e and the lower piston 208c are both conically set, which can facilitate the guidance of the falling of impurities.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in 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).

2. The biogas-to-biogas skid-mounted system according to claim 1, characterized in that: 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 in a circle inside the filter body (205).

3. The biogas-to-biogas skid-mounted system according to claim 2, characterized in that: 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), 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).

4. The biogas-to-biogas skid-mounted system according to claim 3, characterized in that: The diameter of the spiral filter tube (206) gradually decreases from the end thereof close to the front panel (205b) to the end thereof close to the rear panel (205c).

5. The biogas-to-biogas skid-mounted system according to claim 4, 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).

6. The biogas-to-biogas skid-mounted system according to claim 5, characterized in that: 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); The front panel (205b) is provided with a guide cone (205g).

7. The skid-mounted system for producing biogas from biogas according to any one of claims 3 to 6, 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).

8. The biogas-to-biogas skid-mounted system according to claim 7, 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).

9. The biogas-to-biogas skid-mounted system according to claim 8, 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).

10. The biogas-to-biogas skid-mounted system according to claim 9, 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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