Multi-purpose combined utilization and allocation system for biogas

Abstract

The utility model relates to the technical field of combustible gas application, in particular to a multipurpose combined utilization and allocation system for marsh gas, a distribution pipeline is connected with a marsh gas output unit, a plurality of pressurizing pipelines are respectively communicated with the distribution pipeline, and each pressurizing pipeline is provided with a pressurizing fan; the plurality of pressurizing pipelines are respectively communicated with the confluence pipeline, the confluence pipeline is communicated with a plurality of gas utilization devices, and a plurality of switch valves are arranged on the confluence pipeline. Marsh gas produced by the marsh gas production unit enters a distribution pipeline, a plurality of independent marsh gas conveying pipelines are formed through a plurality of pressurizing pipelines, and each pipeline is provided with a pressurizing fan for pressurizing and conveying the marsh gas; through opening and closing of a plurality of switch valves arranged on the confluence pipeline, each gas utilization device can be correspondingly communicated with a pressurization pipeline, proper gas quantity and pressure allocation are selected according to different gas utilization devices, and stable operation of each gas utilization device of the whole biogas utilization system is ensured; and the problem of equipment failure shutdown caused by pressure change is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of combustible gas application, in particular to a biogas multi-purpose combined utilization and deployment system. Background Art

[0002] Biogas is a combustible gas mainly composed of methane produced by the decomposition and fermentation of organic matter by microorganisms under the conditions of being isolated from air, suitable temperature and pH value. Biogas belongs to secondary energy and is a renewable energy source. The early utilization methods of biogas were relatively single. It was first used for street lighting. With the development of the industry and technology, biogas has been more and more widely used. At present, the combined utilization method is mostly adopted in the industry, and biogas is used for power generation, purification to make natural gas, heating and cooking. A pressurization system is adopted in front of the gas-using equipment to meet the starting pressure of the equipment. Usually, one pressurization fan corresponds to multiple gas-using equipment, and the gas supply pipelines of multiple gas-using equipment are shared.

[0003] In the design process of the biogas combined utilization method, one pressurization fan corresponds to multiple gas-using points. When the gas source pressures required by multiple gas-using equipment are inconsistent, the equipment cannot operate stably. When one or more of the gas-using equipment sharing the pipeline start or stop, the pressure in the pipeline will also increase or decrease accordingly. When the pressure reduction or increase amplitude is higher than the operating pressure of other gas-using equipment sharing the pipeline, it may cause the equipment with different gas-using pressures to malfunction and stop. Summary of the Utility Model

[0004] The utility model provides a biogas multi-purpose combined utilization and deployment system to solve the defect that the existing biogas combined utilization method easily causes the gas-using equipment to operate unstably or the equipment to malfunction and stop.

[0005] The utility model provides a biogas multi-purpose combined utilization and deployment system, including a distribution pipeline, a pressurization pipeline and a confluence pipeline. The distribution pipeline is connected to a biogas production unit for receiving the biogas produced by the biogas production unit. There are multiple pressurization pipelines. The multiple pressurization pipelines are respectively communicated with the distribution pipeline, and a pressurization fan is arranged on each pressurization pipeline. The multiple pressurization pipelines are respectively communicated with the confluence pipeline. The confluence pipeline is communicated with multiple gas-using equipment, and multiple switching valves are arranged on the confluence pipeline to realize that the gas-using equipment is correspondingly communicated with one of the pressurization pipelines through the opening and closing of each switching valve.

[0006] According to a biogas multi-purpose combined utilization and deployment system provided by the utility model, the pressurization pipeline is connected with a return pipeline, and the two ends of the return pipeline are respectively connected to the upstream section pressurization pipeline and the downstream section pressurization pipeline of the pressurization fan.

[0007] According to a biogas multi-purpose combined utilization and deployment system provided by the present utility model, the booster fan on the booster pipeline is connected to a power distribution system, and the power distribution system includes a mains power distribution line and an emergency power distribution line. The mains power distribution line and the emergency power distribution line are switched by a dual-power switch to supply power to the booster fan.

[0008] According to a biogas multi-purpose combined utilization and deployment system provided by the present utility model, the power distribution system further includes a section I busbar and a section II busbar. The section I busbar is connected to the mains power distribution line, and the section II busbar is switched to be connected to the section I busbar or the emergency power distribution line through the dual-power switch; at least one of the multiple gas-using devices is a power generation device, and the booster fan on the booster pipeline connected to the power generation device is connected to the section II busbar to draw power, and the remaining booster fans are connected to the section I busbar to draw power. The power generation device is connected to the section I busbar through a branch pipeline to provide emergency power.

[0009] According to a biogas multi-purpose combined utilization and deployment system provided by the present utility model, the emergency power distribution line is a security section busbar system or a diesel generator power generation system.

[0010] According to a biogas multi-purpose combined utilization and deployment system provided by the present utility model, a pressure sensor is provided on the booster pipeline, and a flowmeter is provided on the pipeline connecting the converging pipeline to the gas-using device. The pressure sensor and the flowmeter are electrically connected to a PLC controller, and the PLC controller is used to control the booster fan.

[0011] According to a biogas multi-purpose combined utilization and deployment system provided by the present utility model, the PLC controller includes a PID control module, and the PLC controller performs pressure feedback adjustment on the booster fan according to the pressure data monitored by the pressure sensor.

[0012] According to a biogas multi-purpose combined utilization and deployment system provided by the present utility model, a control box is provided on-site of the gas-using device, and the control device in the control box is electrically connected to the PLC controller to realize on-site control of the booster fan.

[0013] According to a biogas multi-purpose combined utilization and deployment system provided by the present utility model, the biogas multi-purpose combined utilization and deployment system further includes a remote upper computer, and the remote upper computer is electrically connected to the pressure sensor, the flowmeter and the PLC controller to receive the monitoring data of the pressure sensor and the flowmeter at the remote end and adjust the PLC controller to realize remote control of the booster fan.

[0014] According to a biogas multi-purpose combined utilization and deployment system provided by the present utility model, a drain pipe is connected to each of the booster fans on the distribution pipelines to discharge the condensate generated by the booster fans through the drain pipes.

[0015] The biogas multi-purpose combined utilization and deployment system provided by the present utility model can be used for the research and development of biogas multi-purpose deployment. The biogas produced by the biogas production unit enters the distribution pipelines, and multiple independent biogas transportation pipelines are formed through multiple parallel booster pipelines. A booster fan is arranged on each pipeline to pressurize and transport the biogas; by opening and closing multiple switching valves arranged on the confluence pipeline, a booster pipeline can be correspondingly connected to each gas-using device, and the deployment of appropriate gas volume and pressure can be selected for different gas-using devices to ensure the stable operation of each gas-using device in the entire biogas utilization system and solve the problem of equipment failure shutdown caused by pipeline pressure changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic connection structure diagram of the biogas multi-purpose combined utilization and deployment system provided by the present utility model.

[0018] Figure 2 It is a schematic diagram of the power distribution system of the biogas multi-purpose combined utilization and deployment system provided by the present utility model.

[0019] Figure 3 It is a schematic diagram of the control logic of the biogas multi-purpose combined utilization and deployment system provided by the present utility model.

[0020] Reference numerals: 1, distribution pipeline; 2, booster pipeline; 3, booster fan; 4, confluence pipeline; 5, gas-using device; 6, return pipeline; 7, dual-power switching switch; 8, pressure sensor; 9, flowmeter; 10, PLC controller; 11, drain pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0023] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0024] In the embodiments of the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0025] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0026] The following combines Figures 1 to 3 to describe the specific structure and working process of the biogas multi-purpose combined utilization and blending system of the present utility model.

[0027] A specific embodiment of the present utility model provides a biogas multi-purpose combined utilization and blending system. Referring to Figure 1 as shown, it includes a distribution pipeline 1, a boosting pipeline 2, and a confluence pipeline 4. The distribution pipeline 1 is connected to a biogas production unit for receiving the biogas produced by the biogas production unit; there are multiple boosting pipelines 2, and the multiple boosting pipelines 2 are respectively communicated with the distribution pipeline 1, and a boosting fan 3 is arranged on each boosting pipeline 2; the multiple boosting pipelines 2 are respectively communicated with the confluence pipeline 4, the confluence pipeline 4 is communicated with multiple gas-using devices 5, and multiple switching valves are arranged on the confluence pipeline 4 to realize that each gas-using device 5 is correspondingly communicated with one of the boosting pipelines 2 through the opening and closing of each switching valve.

[0028] Continuing to refer to Figure 1 as shown, it can be understood that such a biogas multi-purpose combined utilization and blending system of this embodiment can be used for the research and development of biogas multi-purpose blending. The biogas produced by the biogas production unit enters the distribution pipeline 1, and multiple independent biogas transmission pipelines are formed through the multiple boosting pipelines 2 arranged in parallel. A boosting fan 3 is arranged on each pipeline to pressurize and transport the biogas; through the opening and closing of the multiple switching valves arranged on the confluence pipeline 4, each gas-using device 5 can be correspondingly communicated with one boosting pipeline 2, and the blending of appropriate gas volume and pressure can be selected for different gas-using devices 5 to ensure the stable operation of each gas-using device 5 in the entire biogas utilization system and solve the problem of equipment failure shutdown caused by pipeline pressure changes.

[0029] It should be understood that in the above embodiments, by opening and closing a plurality of switching valves provided on the manifold pipeline 4, the manifold pipeline 4 is formed into multiple non-connected pipeline segments, and each pipeline segment is connected to a pressurizing pipeline 2 and a gas-using device 5, forming an independent pipeline design for the gas-using device 5. In some examples, by opening and closing a plurality of switching valves provided on the manifold pipeline 4, each gas-using device 5 is equipped with a pressurizing pipeline 2 to reduce the supply pressure of each pressurizing pipeline 2 and improve the gas supply capacity of the system.

[0030] In some specific examples, one of the multiple pressurizing pipelines 2 is to be used as a standby pressurizing pipeline. In addition, the gas-using devices 5 with large gas consumption and the gas-using devices 5 with small gas consumption can be grouped to facilitate the selection and allocation of the booster fans 3 in the pressurizing pipelines 2. Continuing to refer to Figure 1 As shown, the figure schematically shows three gas-using devices 5, which can be used for purification, power generation, and boiler heating respectively. Among them, the gas-using devices 5 for power generation and boiler heating have relatively less gas consumption, while the gas-using device 5 for purification has relatively more gas consumption. In this example, the two gas-using devices 5 for power generation and boiler heating are grouped into one group, and the corresponding two pressurizing pipelines 2 are connected through the first manifold pipeline 4; the gas-using device 5 for purification and another gas-using device 5 for torch combustion (not shown in the figure) can be divided into a second group, and the corresponding two pressurizing pipelines 2 are connected through the second manifold pipeline 4. In addition, a standby pressurizing pipeline 2 can be provided in parallel for the second group, and the two manifold pipelines 4 are finally connected. In this way, finally, five pressurizing pipelines 2 are equipped for four gas-using devices 5. Among them, four pressurizing pipelines 2 and four gas-using devices 5 can form an interconnected supply one by one. The last pressurizing pipeline 2 is used as a standby pressurizing pipeline and is used for replacement when any one of the four pressurizing pipelines 2 fails. In addition, the distribution system is divided into a high gas supply area (the second group) and a low gas supply area (the first group), which is convenient for the selection of the booster fans 3 on each pressurizing pipeline 2.

[0031] For the biogas multi-purpose combined utilization and deployment system of the present utility model, when selecting the booster fan 3, it should be considered that the air volume of the booster fan 3 is sufficient, and the design is considered according to the maximum hourly gas consumption. At the same time, the efficiency of the booster fan 3 should be considered; the wind pressure of the booster fan 3 should be sufficient. In addition to considering the pipe loss, equipment pressure loss and equipment start-up pressure after the outlet of the booster fan 3, the pipe loss and equipment pressure loss before the inlet of the booster fan also need to be considered. In addition, in some specific embodiments, the booster pipeline 2 is connected with a return pipeline 6, and both ends of the return pipeline 6 are respectively connected to the upstream section booster pipeline and the downstream section booster pipeline of the booster fan 3. It can be understood that when the booster fan 3 in the system suddenly fails and stops, the gas in the system pipeline is affected by pressure and may flow back and impact the booster fan 3, causing the fan to reverse, and further causing secondary damage to the booster fan 3. In this embodiment, the return pipeline 6 provided will cause the gas in the system pipeline to flow back through the return pipeline 6 to bypass the booster fan 3 when the booster fan 3 suddenly fails and stops, and will not cause the booster fan 3 to form a fan reverse, thus avoiding secondary damage to the booster fan 3.

[0032] In other embodiments of the biogas multi-purpose combined utilization and deployment system of the present utility model, the booster fan 3 on the booster pipeline 2 is connected to the power distribution system. The power distribution system includes a mains power distribution line and an emergency power distribution line, and the mains power distribution line and the emergency power distribution line are switched by a dual-power switch 7 to supply power to the booster fan 3. It can be understood that the biogas multi-purpose combined utilization and deployment system of this embodiment is equipped with a two-way power distribution system for multiple booster fans 3. Under normal circumstances, normal power supply is carried out through the mains power distribution line. When a power outage occurs due to a failure of the mains power distribution line, the power is switched through the dual-power switch 7 to the emergency power distribution line to ensure the supply of the wind pressure of the outlet pipe network of the booster fan 3.

[0033] Specifically, in some specific examples, refer to Figure 2 As shown, the power distribution system further includes a section I busbar and a section II busbar. The section I busbar is connected to the mains power distribution line, and the section II busbar is switched and connected to the section I busbar or the emergency power distribution line through the dual-power switch 7; at least one of the multiple gas-using devices 5 is a power generation device, and the booster fan 3 on the booster pipeline 2 connected to the power generation device takes power by connecting to the section II busbar, and the remaining booster fans 3 take power by connecting to the section I busbar. The power generation device is connected to the section I busbar through a branch pipeline to provide emergency power.

[0034] It can be understood that the power distribution system in this example adopts a single-busbar sectionalized method, including a section I busbar and a section II busbar. The two busbars are connected by a dual-power switch 7. The section I busbar is connected to the mains power distribution line to take power, and the section II busbar is connected to the section I busbar or the emergency power distribution line through the dual-power switch 7 to take power. The emergency power distribution line is a security section busbar system or a diesel generator power generation system. Refer to again Figure 2As shown, when the mains power distribution line is supplying power normally, the dual-power switch 7 connects the first section of busbar and the second section of busbar, and all the booster fans 3 can be started and operated normally. When a power outage occurs due to a fault in the mains power distribution line, Figure 2 the two booster fans 3 powered by taking power from the first section of busbar are powered off. At this time, the dual-power switch 7 performs power switching. The second section of busbar is connected to the standby power distribution line through the dual-power switch 7. The booster fans 3 connected to the second section of busbar take power through the standby power distribution line. The booster fans 3 connected to the second section of busbar supply biogas to the power generation device for power generation. The power generated by the power generation device is connected to the first section of busbar through the branch pipeline to provide standby power. After the first section of busbar is powered on, the two booster fans 3 powered by taking power from the first section of busbar can work normally. In the power distribution system of this example, the normal operation of all booster fans 3 is ensured through the switching between the mains power distribution line and the standby power distribution line, and the normal supply of the air pressure of the outlet pipe network of the booster fans 3 is guaranteed.

[0035] It should be understood that the power distribution circuit switching of three booster fans 3 is exemplified in the above example. In a specific embodiment, there may be more than three booster fans 3, such as Figure 1 the situation of five booster fans 3 in, however, no matter how many booster fans 3 are set, there must be at least one booster fan 3 connected to the second section of busbar to supply gas to the gas-using equipment 5 for power generation. In addition, the booster fans 3 can also be provided with booster fan cooling fans in parallel as Figure 2 shown, and are connected to the corresponding busbar in the same way as the corresponding booster fans 3, and are used to cool the booster fans 3.

[0036] In other embodiments of the biogas multi-purpose combined utilization and allocation system of the present invention, a pressure sensor 8 is provided on the booster pipeline 2, and a flow meter 9 is provided on the pipeline connecting the converging pipeline 4 and the gas-using equipment 5. The pressure sensor 8 and the flow meter 9 are electrically connected to the PLC controller 10, and the PLC controller 10 is used to control the booster fans 3. It can be understood that the gas consumption of each gas-using equipment 5 may be different at different times. For example, the heating amount required by the anaerobic system in different seasons is different, or the self-generated power is reduced, and in this case, the gas consumption of biogas will also be reduced respectively. At this time, it is necessary to adjust the supply amount of biogas. The traditional operation form is to manually adjust the operation frequency of the booster fans, and the degree of automation is not high. The pressure sensor 8 and the flow meter 9 in this embodiment can monitor the biogas supply amount and supply pressure of the gas-using equipment 5, and control the operation efficiency of each booster fan 3 through the PLC controller 10 in combination with the monitoring data, so as to realize the automatic operation of each gas-using equipment 5 and the mutual allocation of gas volume.

[0037] In some specific examples, the PLC controller 10 includes a PID control module, and the PLC controller 10 performs pressure feedback adjustment on the booster fans 3 through the pressure data monitored by the pressure sensor 8. See Figure 3As shown, the pressure sensor 8 on the pressure-increasing pipeline in the downstream section of the pressure-increasing fan 3 and the flowmeter 9 on the pipeline connecting the gas-using equipment 5 monitor the gas supply pressure value and the flow rate value, and compare them with the required set pressure and flow rate during the operation of the gas-using equipment 5. Real-time feedback adjustment is carried out through the PID control module of the PLC controller 10, and the gas supply frequency of the pressure-increasing fan 3 is changed in real time to meet the required pressure and flow rate requirements during equipment operation and ensure the normal operation of the gas-using equipment 5.

[0038] In some other specific examples, a control box is provided on-site for the gas-using equipment 5, and the control equipment in the control box is electrically connected to the PLC controller 10 to achieve on-site control of the pressure-increasing fan 3. According to the layout of on-site equipment, a on-site control box is set beside the gas-using equipment 5. By manually controlling and adjusting the control equipment in the control box on-site, the corresponding gas-using equipment 5 can be started and stopped locally or the air supply frequency of the pressure-increasing fan 3 can be adjusted. Further, the biogas multi-purpose combined utilization and deployment system further includes a remote upper computer, which is electrically connected to the pressure sensor 8, the flowmeter 9 and the PLC controller 10 to receive the monitoring data of the pressure sensor 8 and the flowmeter 9 remotely and adjust the PLC controller 10 to achieve remote control of the pressure-increasing fan 3.

[0039] In some other embodiments of the biogas multi-purpose combined utilization and deployment system of the present utility model, refer again to Figure 1 As shown, a drain pipe 11 is connected to each pressure-increasing fan 3 on the distribution pipeline 1 to discharge the condensate generated by the pressure-increasing fan 3 through the drain pipe 11. It can be understood that the biogas produced by the biogas production unit may contain a certain amount of water vapor, which may condense into liquid during the transportation in the pipeline. In this embodiment, the condensed liquid is uniformly transported to the waste liquid recovery unit for treatment through the drain pipe 11.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A multi-purpose combined utilization and deployment system for biogas, characterized in that, Comprising: A distribution pipeline (1) connected to a biogas production unit for receiving biogas produced by the biogas production unit; A plurality of pressurization pipelines (2), each of the plurality of pressurization pipelines (2) is communicated with the distribution pipeline (1), and a pressurization fan (3) is arranged on each pressurization pipeline (2); A confluence pipeline (4), each of the plurality of pressurization pipelines (2) is communicated with the confluence pipeline (4), the confluence pipeline (4) is communicated with a plurality of gas-using devices (5), and a plurality of switching valves are arranged on the confluence pipeline (4) to enable the corresponding connection of one of the pressurization pipelines (2) to the gas-using device (5) through the opening and closing of each switching valve.

2. The biogas multi-purpose combined utilization and deployment system according to claim 1, characterized in that The pressurization pipeline (2) is connected with a reflux pipeline (6), and two ends of the reflux pipeline (6) are respectively connected to the upstream section pressurization pipeline and the downstream section pressurization pipeline of the pressurization fan (3).

3. The biogas multi-purpose combined utilization and deployment system according to claim 1, wherein The pressurization fan (3) on the pressurization pipeline (2) is connected to a power distribution system, the power distribution system includes a mains power distribution line and a standby power distribution line, and the mains power distribution line and the standby power distribution line are switched by a dual-power switching switch (7) to supply power to the pressurization fan (3).

4. The biogas multi-purpose combined utilization and deployment system according to claim 3, characterized in that, The power distribution system further includes a section I busbar and a section II busbar, the section I busbar is connected to the mains power distribution line, and the section II busbar is switched to be connected to the section I busbar or the standby power distribution line through the dual-power switching switch (7); At least one of the plurality of gas-using devices (5) is a power generation device, the pressurization fan (3) on the pressurization pipeline (2) communicating with the power generation device is connected to the section II busbar to draw power, and the remaining pressurization fans (3) are connected to the section I busbar to draw power, and the power generation device is connected to the section I busbar through a branch pipeline to provide standby power.

5. The biogas multi-purpose combined utilization and deployment system according to claim 4, characterized in that The standby power distribution line is a security section busbar system or a diesel generator power generation system.

6. The biogas multi-purpose combined utilization and blending system according to any one of claims 1 to 5, characterized in that, A pressure sensor (8) is arranged on the pressurization pipeline (2), a flowmeter (9) is arranged on the pipeline where the confluence pipeline (4) is communicated with the gas-using device (5), the pressure sensor (8) and the flowmeter (9) are electrically connected to a PLC controller (10), and the PLC controller (10) is used to control the pressurization fan (3).

7. The biogas multi-purpose combined utilization and deployment system according to claim 6, characterized in that, The PLC controller (10) includes a PID control module, and the PLC controller (10) performs pressure feedback regulation on the pressurization fan (3) according to the pressure data monitored by the pressure sensor (8).

8. The biogas multi-purpose combined utilization and deployment system according to claim 6, characterized in that, 9. The biogas multi-purpose combined utilization and deployment system according to claim 6, characterized in that A control box is arranged at the site of the gas-using device (5), and the control device in the control box is electrically connected to the PLC controller (10) to realize on-site control of the pressurization fan (3). The biogas multi-purpose combined utilization and deployment system further includes a remote upper computer, and the remote upper computer is electrically connected to the pressure sensor (8), the flowmeter (9) and the PLC controller (10) to receive the monitoring data of the pressure sensor (8) and the flowmeter (9) remotely and adjust the PLC controller (10) to realize remote control of the pressurization fan (3).

10. The biogas multi-purpose combined utilization and blending system according to any one of claims 1 to 5, characterized in that A drain pipe (11) is connected to each of the booster fans (3) on the distribution pipeline (1) to discharge the condensate generated by the booster fans (3) through the drain pipe (11).

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