Multi-gas supply system suitable for gas engine

Abstract

The multi-gas supply system suitable for the gas engine comprises a biogas pipeline system and a municipal natural gas pipeline system, and the biogas pipeline system is connected with a gas inlet pipe of a gas engine unit through the components; a municipal natural gas pipeline is connected with a gas inlet pipe of the gas engine unit through the components; a blow-off pipeline a is arranged between the manual valve a and the pressure gauge a, and a blow-off valve a is arranged on the blow-off pipeline a; a blow-off pipeline b is arranged between the manual valve c and the pressure gauge c and is provided with a blow-off valve b; the two sides of the flame arrester a are connected to the fine filter a and the pressure stabilizing valve sets respectively, and the multiple pressure stabilizing valve sets are arranged. According to the two-path fuel gas inlet system, one path is used for generating marsh gas as a part of fuel by using waste residues and waste water generated in the production process, the other path, namely municipal fuel gas, is used for supplementing the insufficient part, and the two paths of systems can be used at the same time, namely the two kinds of fuel are mixed for use, so that the requirements of users are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas engine complete sets, in particular to a multi-gas supply system suitable for gas engines. Background Art

[0002] With increasingly stringent environmental regulations and rising energy costs for enterprises, some small industrial parks in China are currently using small cogeneration systems consisting of small gas-fired generators and waste heat boilers to achieve complementary advantages and coordinated development of the heat, electricity and cooling energy supply model, as well as cascaded energy utilization, which is conducive to the overall planning of energy and energy conservation, reducing the pressure on the power grid and filling valleys and shaving peaks.

[0003] Some users use small gas-fired generator sets, which use waste residue and wastewater generated during the production process to generate biogas as part of the fuel, and use municipal gas to supplement the insufficient part. Based on the gas-fired generator set, it makes full use of the waste heat generated by the engine, and is equipped with a small absorption lithium bromide unit. With a centralized control method, a distributed energy system that realizes the trigeneration of cooling, heating and electricity is designed to improve the comprehensive energy utilization efficiency of the entire system.

[0004] To this end, a multi-gas supply system suitable for a gas engine is provided to solve the above-mentioned problems. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a multi-gas supply system suitable for gas engines. The system partially uses biogas generated by waste residues and wastewater generated in the production process of users as part of the fuel, and the insufficient part is supplemented by municipal gas. In order to allow the gas engine to adapt to two different fuels, biogas and natural gas, and even the mixed use of the two fuels, the utility model designs a new gas supply system for the gas engine.

[0006] The technical solution adopted by the utility model is as follows:

[0007] The utility model proposes a multi-gas supply system suitable for gas engines, including a biogas pipeline system and a municipal natural gas pipeline system, and also includes a buffer tank, a manual valve a, a pressure gauge a, a fine filter a, a flame arrester a, a pressure stabilizing valve group, a pressure gauge b, a concentration meter, a flow meter a, a manual valve b and a gas engine group;

[0008] The biogas pipeline system is connected in sequence to a buffer tank, a manual valve a, a pressure gauge a, a fine filter a, a flame arrester a, a pressure stabilizing valve group, a pressure gauge b, a concentration meter, a flow meter a and a manual valve b through a gas pipe;

[0009] The biogas pipeline system is connected to the gas intake pipe of the gas engine set through the above components;

[0010] The system further includes a manual valve c, a pressure gauge c, a fine filter b, a flow meter b, a flame arrester b, a pressure regulating valve, a solenoid valve b, a pressure gauge d and a manual valve d;

[0011] The municipal natural gas pipeline system is sequentially connected to the manual valve c, the pressure gauge c, the fine filter b, the flow meter b, the flame arrester b, the pressure regulating valve, the solenoid valve b, the pressure gauge d and the manual valve d through a gas pipeline;

[0012] The municipal natural gas pipeline is connected to the gas inlet pipeline of the gas engine set through the above components.

[0013] As a further solution of the present utility model, a blow-off pipeline a is provided between the manual valve a and the pressure gauge a, and a blow-off valve a is provided on the blow-off pipeline a.

[0014] As a further solution of the present utility model, a blow-off pipeline b is provided between the manual valve c and the pressure gauge c, and a blow-off valve b is provided on the blow-off pipeline b.

[0015] As a further solution of the present utility model, both sides of the flame arrester a are respectively connected to the fine filter a and the pressure stabilizing valve group, and multiple groups of the pressure stabilizing valve group are provided.

[0016] As a further solution of the present utility model, both sides of the flame arrester b are respectively connected to the flow meter b and the pressure regulating valve.

[0017] As a further solution of the present utility model, a solenoid valve a is provided on one side of the pressure stabilizing valve group, and one side of the solenoid valve b is connected to the pressure regulating valve.

[0018] Implementing the technical solution of the present utility model will have the following beneficial effects:

[0019] The two-way gas intake system of the present utility model uses biogas generated from the waste residues and waste water produced in the production process as a part of the fuel, and the insufficient part is supplemented with the other way, that is, the municipal gas. Moreover, the two systems can be used simultaneously, that is, the two fuels are mixed for use, meeting the user's needs.

[0020] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the above-described illustrative aspects, embodiments and features, further aspects, embodiments and features of the present utility model will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description 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.

[0022] Figure 1 The structural schematic diagram of the gas supply system proposed in the embodiment of the present invention.

[0023] In the figure: 1. Buffer tank; 2. Manual valve a; 3. Bleed valve a; 4. Bleed pipeline a; 5. Pressure gauge a; 6. Fine filter a; 7. Flame arrester a; 8. Pressure stabilizing valve group; 9. Solenoid valve a; 10. Pressure gauge b; 11. Concentration meter; 12. Flow meter a; 13. Manual valve b; 14. Manual valve c; 15. Bleed valve b; 16. Bleed pipeline b; 17. Pressure gauge c; 18. Fine filter b; 19. Flow meter b; 20. Flame arrester b; 21. Pressure regulating valve; 22. Solenoid valve b; 23. Pressure gauge d; 24. Manual valve d; 25. Gas generator set.

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. Detailed implementation manners

[0025] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0026] It should be noted that terms such as "first", "second", etc. are only used for distinguishing descriptions and position description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", etc. can explicitly or implicitly include one or more of such features; similarly, when certain features are not limited in quantity by words such as "two", "three", etc., it should be noted that such features also belong to explicitly or implicitly including one or more feature quantities;

[0027] In the embodiments of the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "fixation" shall be understood in a broad sense; for example, it may be a fixed connection, a detachable connection, or an integrally formed one; it may be a mechanical connection, a direct connection, a welding connection, or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with the specific situations according to the accompanying drawings of the specification.

[0028] In the description of the embodiments of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present utility model.

[0029] As Figure 1 shown, the embodiments of the present utility model provide a multi-gas supply system applicable to a gas engine, including a biogas pipeline system and a municipal natural gas pipeline system, and further including a buffer tank 1, a manual valve a 2, a pressure gauge a 5, a fine filter a 6, a flame arrester a 7, a pressure stabilizing valve group 8, a pressure gauge b 10, a concentration meter 11, a flow meter a 12, a manual valve b 13, and a gas engine group 25;

[0030] The biogas pipeline system is sequentially connected to the buffer tank 1, the manual valve a 2, the pressure gauge a 5, the fine filter a 6, the flame arrester a 7, the pressure stabilizing valve group 8, the pressure gauge b 10, the concentration meter 11, the flow meter a 12, and the manual valve b 13 through a gas pipeline; the biogas pipeline system is connected to the gas inlet pipe of the gas engine group 25 through the above components.

[0031] In the specific application of the embodiments of the present utility model, the gas (i.e., biogas) in the biogas pipeline system starts from the source and flows into the buffer tank 1 through the gas pipeline. The buffer tank 1 plays a role in storing and buffering the gas pressure fluctuation to ensure stable subsequent gas supply; the gas passes through the manual valve a 2 from the buffer tank 1, and the manual valve a 2 allows the operator to manually control the on-off of the biogas pipeline to facilitate maintenance, debugging or cutting off the gas supply in case of emergency.

[0032] The gas passes through pressure gauge a5, where the pressure of the gas can be monitored in real time to ensure that the pressure is within a safe and appropriate range. The gas then enters fine filter a6, which can filter out impurities in the gas to prevent the impurities from damaging the subsequent components and the gas engine set. The gas continues to pass through flame arrester a7. The main function of flame arrester a7 is to prevent the reverse propagation of flame, that is, to block the flame in case of flashback and ensure the safety of the system.

[0033] The gas enters pressure stabilizing valve group 8, which can stabilize the pressure of the gas to ensure that the gas pressure supplied to the gas engine set is stable and meets the requirements. The gas passes through a pressure gauge b10 again to further monitor whether the pressure is stable. The gas flows through concentration meter 11, which can measure the concentration of the gas, and this is crucial for controlling the working state of the gas engine.

[0034] Flowmeter a12 can accurately measure the flow rate of the gas to help control the accuracy and stability of the gas supply. The gas passes through manual valve b13 and is connected to the gas inlet pipe of gas engine set 25. Manual valve b13 can also play a role in cutting off the gas supply when necessary.

[0035] This system also includes manual valve c14, pressure gauge c17, fine filter b18, flowmeter b19, flame arrester b20, pressure regulating valve 21, solenoid valve b22, pressure gauge d23 and manual valve d24;

[0036] The municipal natural gas pipeline system is sequentially connected to manual valve c14, pressure gauge c17, fine filter b18, flowmeter b19, flame arrester b20, pressure regulating valve 21, solenoid valve b22, pressure gauge d23 and manual valve d24 through the gas pipe; the municipal natural gas pipeline is connected to the gas inlet pipe of gas engine set 25 through the above components.

[0037] In the specific application of the embodiment of the present utility model, the natural gas in the municipal natural gas pipeline system is connected to the system through the gas pipe and passes through manual valve c14. The operator manually controls the on-off of the natural gas pipeline to ensure that the natural gas supply can be safely cut off during maintenance, debugging or emergency situations. The natural gas flows through pressure gauge c17, where the pressure of the natural gas can be monitored in real time to ensure that it is within a suitable range, which helps the operator understand the supply state of the natural gas and make adjustments when necessary.

[0038] Natural gas passes through the fine filter b18 to remove impurities and particulate matter in the natural gas, ensuring that the natural gas entering the gas engine set is clean and free of impurities, and avoiding damage to the engine. The natural gas passes through the flow meter b19, which can accurately measure the flow rate of the natural gas, providing accurate data support for controlling the gas supply volume, and contributing to the stable operation and efficient energy utilization of the gas engine set. The natural gas passes through the flame arrester b20 to prevent the reverse propagation of the flame in the pipeline, ensuring the safety of the system. In case of abnormal situations such as flashback, the flame arrester can quickly cut off the propagation path of the flame and prevent the spread of the fire.

[0039] The natural gas enters the pressure regulating valve 21, which can automatically adjust the pressure of the natural gas according to the requirements of the gas engine set, ensuring that it is supplied to the engine within an appropriate range. The natural gas passes through the solenoid valve b22, which can quickly open or close the gas passage according to the control signal, realizing automatic control. In case of an emergency, the solenoid valve can quickly cut off the gas supply to ensure the safety of the system.

[0040] The natural gas passes through the pressure gauge d23 again to further monitor whether its pressure is stable and meets the requirements; the natural gas passes through the manual valve d24, which is connected to the gas inlet pipe of the gas engine set 25, and can manually cut off the natural gas supply when necessary, serving as one of the safety protection measures.

[0041] Through the precise control and coordination of the above components, the municipal natural gas pipeline system can supply clean and stable natural gas to the gas engine set, ensuring the normal operation of the engine. At the same time, various monitoring and regulating devices in the system can provide real-time feedback on the state of the natural gas and the requirements of the engine, helping the operator to achieve precise control and maintenance.

[0042] In a possible implementation manner, a relief pipeline a4 is provided between the manual valve a2 and the pressure gauge a5, and a relief valve a3 is provided on the relief pipeline a4.

[0043] In the specific application of the embodiment of the present utility model, the relief pipeline a4 is provided to safely discharge the natural gas or other gas in the gas pipeline to the atmosphere when the system starts, stops or fails, thus avoiding potential safety problems caused by excessive pressure in the pipeline. The relief valve a3 can be manually or automatically opened or closed according to the needs of the system. Under normal working conditions, the relief valve a3 is usually closed to ensure that the gas can flow smoothly to the gas engine set. However, in certain specific situations, such as when the system pressure is too high or when it is necessary to empty the gas in the pipeline, the relief valve a3 can be opened to allow the gas to be discharged to the external environment through the relief pipeline a4.

[0044] The manual valve a2 allows the operator to manually control the on / off of the gas. By operating the manual valve a2, precise control of the gas supply can be achieved, ensuring that the gas supply can be safely cut off during maintenance, debugging or emergency situations. The pressure gauge a5 is used to monitor the gas pressure in the pipeline in real time. By reading the indication of the pressure gauge a5, the operator can understand the current state of the gas supply and, if necessary, maintain the stability of the pipeline pressure by adjusting the manual valve a2 or the bleed valve a3.

[0045] In a possible implementation, a bleed pipeline b16 is provided between the manual valve c14 and the pressure gauge c17, and the bleed pipeline b16 is provided with a bleed valve b15.

[0046] In the specific application of the embodiment of the present utility model, the manual valve c14 allows the operator to manually control the on / off of the gas according to actual needs. Under normal circumstances, the manual valve c14 remains open, allowing the gas to flow smoothly to the gas engine. However, during maintenance, debugging or emergency situations, the operator can quickly close the manual valve c14 to cut off the gas supply, thus ensuring the safety of the system.

[0047] The pressure gauge c17 is used to monitor the pressure change in the gas pipeline in real time. By reading the indication of the pressure gauge c17, the operator can accurately understand the current pressure state of the gas supply. Once the pressure exceeds the safe range, the operator can quickly take measures, such as adjusting the gas supply or opening the bleed valve, to prevent safety accidents caused by excessive pressure.

[0048] The purpose of the bleed pipeline b16 is to safely discharge the gas in the pipeline to the atmosphere when the system pressure is abnormal. When the gas pressure exceeds the set value, the bleed valve b15 will open automatically or according to the operator's command, allowing the gas to be discharged to the external environment through the bleed pipeline b16. Considering safety and reliability, the bleed valve b15 usually adopts a spring type or piston type structure and can open or close automatically at the set pressure value. At the same time, the bleed valve b15 is also equipped with a sealing device to ensure that the gas discharge can be completely blocked in the closed state.

[0049] In a possible implementation, both sides of the flame arrester a7 are respectively connected to the fine filter a6 and the pressure stabilizing valve group 8, and multiple groups of pressure stabilizing valve groups 8 are provided.

[0050] In the specific application of the embodiment of the present utility model, the fine filter a6, as the first line of defense of the gas supply system, is responsible for filtering out impurities and particulate matters in the gas. If these impurities and particulate matters enter the engine, they may cause damage to the engine and affect its normal operation. The fine filter a6 can effectively protect the gas supply system and the engine from damage. The gas filtered by the fine filter a6 will then flow through the flame arrester a7. The main function of the flame arrester a7 is to prevent safety accidents caused by flashback during gas supply. When flashback occurs in the gas engine, the flame arrester a7 can quickly cut off the fire source and prevent the flame from spreading to the gas supply system, thus ensuring the safety of the system.

[0051] After the flame arrester a7, the gas will enter the pressure stabilizing valve group 8. The pressure stabilizing valve group 8 keeps the pressure in the gas pipeline constant by automatically adjusting the opening of the valve. When the gas pressure rises, the pressure stabilizing valve will automatically adjust the valve opening to make part of the gas flow back, thereby reducing the pressure in the pipeline; conversely, when the gas pressure drops, the pressure stabilizing valve will increase the valve opening to allow more gas to enter the pipeline to maintain the constant pressure.

[0052] This not only ensures the stable operation of the gas engine but also improves its working efficiency because the stability of the gas pressure has a direct impact on the combustion efficiency of the engine. If the gas pressure fluctuates too much, it will cause incomplete combustion of the engine, generate excessive exhaust gas, and even may cause engine failures.

[0053] In a possible implementation manner, both sides of the flame arrester b20 are respectively connected to the flow meter b19 and the pressure regulating valve 21.

[0054] In the specific application of the embodiment of the present utility model, the flow meter b19 is responsible for real-time monitoring of the gas flow rate to ensure that the gas is supplied to the engine according to the preset quantity and speed. Through accurate measurement and monitoring, the flow meter b19 can avoid the situation of excessive or insufficient gas supply, thus maintaining the stable operation of the engine.

[0055] The gas metered by the flow meter b19 will then flow through the flame arrester b20. The flame arrester b20 prevents safety accidents caused by flashback or external fire sources during gas supply. The gas enters the pressure regulating valve 21. The pressure regulating valve 21 automatically adjusts the gas pressure according to parameters such as the load and speed of the engine to ensure that the engine can obtain a stable and appropriate gas supply under various working conditions.

[0056] In a possible implementation manner, an electromagnetic valve a9 is provided on one side of the pressure stabilizing valve group 8, and one side of the electromagnetic valve b22 is connected to the pressure regulating valve 21.

[0057] In the specific application of the embodiments of the present utility model, regardless of how the pressure of the gas supply fluctuates, the pressure stabilizing valve group 8 can adjust the size of the passage according to the pressure change through the combination of the valve core and the spring inside it, so as to ensure that the outlet pressure always remains within the set value range.

[0058] The gas flows through the solenoid valve a9, which is an automated component that controls the on-off of the fluid through electromagnetic control. When receiving a control signal, the solenoid valve a9 will quickly open or close, thereby controlling the flow of the gas. In this way, the solenoid valve a9 can achieve precise control of the gas supply and ensure that the engine can obtain the required amount of gas under different operating conditions.

[0059] The gas enters the pressure regulating valve 21 to further finely adjust the pressure of the gas to meet the specific requirements of the engine for the gas pressure. It can automatically adjust the gas pressure according to parameters such as the load and speed of the engine to ensure that the engine can obtain the best performance and efficiency under various operating conditions.

[0060] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0061] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

[0062] The above describes the present utility model and its embodiments. Such a description is not restrictive. What is shown in the drawings is only one of the embodiments of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the creative purpose of the present utility model, design similar structural forms and embodiments to this technical solution without creative efforts, they should all fall within the protection scope of the present utility model.

Claims

1. A multi-gas supply system applicable to a gas engine, comprising a biogas pipeline system and a municipal natural gas pipeline system, characterized in that, It also includes a buffer tank (1), a manual valve a (2), a pressure gauge a (5), a fine filter a (6), a flame arrester a (7), a pressure stabilizing valve group (8), a pressure gauge b (10), a concentration meter (11), a flowmeter a (12), a manual valve b (13), and a gas engine group (25); The biogas pipeline system is sequentially connected to the buffer tank (1), the manual valve a (2), the pressure gauge a (5), the fine filter a (6), the flame arrester a (7), the pressure stabilizing valve group (8), the pressure gauge b (10), the concentration meter (11), the flowmeter a (12), and the manual valve b (13) through a gas pipeline; The biogas pipeline system is connected to the gas inlet pipe of the gas engine group (25) through the above components; This system also includes a manual valve c (14), a pressure gauge c (17), a fine filter b (18), a flowmeter b (19), a flame arrester b (20), a pressure regulating valve (21), a solenoid valve b (22), a pressure gauge d (23), and a manual valve d (24); The municipal natural gas pipeline system is sequentially connected to the manual valve c (14), the pressure gauge c (17), the fine filter b (18), the flowmeter b (19), the flame arrester b (20), the pressure regulating valve (21), the solenoid valve b (22), the pressure gauge d (23), and the manual valve d (24) through a gas pipeline; The municipal natural gas pipeline is connected to the gas inlet pipe of the gas engine group (25) through the above components.

2. The multi-gas supply system applicable to a gas engine according to claim 1, wherein A relief pipeline a (4) is provided between the manual valve a (2) and the pressure gauge a (5), and a relief valve a (3) is provided on the relief pipeline a (4).

3. A multi-gas supply system applicable to a gas engine according to claim 1, characterized in that, A relief pipeline b (16) is provided between the manual valve c (14) and the pressure gauge c (17), and a relief valve b (15) is provided on the relief pipeline b (16).

4. A multi-gas supply system applicable to a gas engine according to claim 1, characterized in that, Both sides of the flame arrester a (7) are respectively connected to the fine filter a (6) and the pressure stabilizing valve group (8), and multiple groups of the pressure stabilizing valve group (8) are provided.

5. A multi-gas supply system applicable to a gas engine according to claim 1, characterized in that, Both sides of the flame arrester b (20) are respectively connected to the flowmeter b (19) and the pressure regulating valve (21).

6. The multi-gas supply system applicable to a gas engine according to claim 1, characterized in that, One side of the pressure stabilizing valve group (8) is provided with a solenoid valve a (9), and one side of the solenoid valve b (22) is connected to the pressure regulating valve (21).

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