Biogas and natural gas combined peak shaving system

Abstract

The utility model relates to the technical field of natural gas storage peak shaving, in particular to a biogas and natural gas combined peak shaving system. Comprising a biogas module, a natural gas module, a compressed natural gas module and a mixed gas module, the biogas module comprises a biogas conveying pipeline and a first three-way pipe valve, the natural gas module comprises a natural gas conveying pipeline and a second three-way pipe valve, and the compressed natural gas module comprises a compressed gas conveying pipeline, a compressor and a gas storage tank; the leading-out end of the first three-way pipe valve is connected with a generator, the generator is electrically connected with the compressor, the leading-out end of the second three-way pipe valve is in butt joint with the compressor, the mixed gas module comprises a mixing tank and a mixed transportation pipeline, and the mixed transportation pipeline is in butt joint with an urban pipe network. And the biological natural gas conveying pipeline, the natural gas conveying pipeline and the compressed gas conveying pipeline are respectively butted with the mixing tank. Through combined peak regulation of biological natural gas and natural gas, the problem of natural gas source shortage in part of areas can be effectively relieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas storage peak shaving technical field especially a kind of biological natural gas and natural gas combined peak shaving system. BACKGROUND

[0002] In city natural gas pipe network transmission and distribution system, the demand of various gas users is constantly changing, and the gas supply is basically stable. Therefore, in order to ensure the continuity of gas supply and the balance between gas supply and gas consumption, to solve the problem of natural gas peak shaving, according to the characteristics of various peak shaving modes, to build peak shaving facilities and select different peak shaving modes according to local conditions, so as to ensure continuous, safe, stable and timely gas supply for users. Biological natural gas refers to green low-carbon clean renewable unconventional natural gas produced by converting and purifying various urban and rural organic waste such as crop straw, livestock and poultry manure, household garbage and industrial organic wastewater, and the important component is methane. Therefore, it is urgent to use biological natural gas and natural gas combined peak shaving to alleviate the problem of natural gas source shortage in some areas. CONTENT OF THE UTILITY MODEL

[0003] The technical problem to be solved by the embodiment of the utility model is to provide a rotor speed reduction device and a helicopter, so as to solve the problem of natural gas source shortage in some areas caused by the changing demand of various gas users in the prior art.

[0004] The utility model discloses a kind of biological natural gas and natural gas combined peak shaving system, comprising:

[0005] Biological natural gas module, including biological natural gas conveying pipeline, and first three-way pipe valve being arranged on the biological natural gas conveying pipeline;

[0006] Natural gas module, including natural gas conveying pipeline, and second three-way pipe valve being arranged on the natural gas conveying pipeline;

[0007] Compressed natural gas module, including compressed gas conveying pipeline, and compressor and gas storage tank being arranged on the compressed gas conveying pipeline, the leading end of the first three-way pipe valve is connected with generator, and the generator is electrically connected with the compressor, the leading end of the second three-way pipe valve is butted with the compressor;

[0008] Mixed gas module, including mixing tank, and mixed conveying pipeline being butt-jointed with the mixing tank, the mixed conveying pipeline is butt-jointed with city pipe network, the biological natural gas conveying pipeline, the natural gas conveying pipeline and the compressed gas conveying pipeline are respectively butt-jointed with the mixing tank.

[0009] Optionally, the biogas module further comprises a first pressure regulating unit and a first flow metering unit, the first pressure regulating unit and the first flow metering unit are sequentially arranged on the biogas conveying pipeline in an upstream-to-downstream direction, and the first pressure regulating unit and the first flow metering unit are located between the first three-way valve and the mixing tank.

[0010] Optionally, the biogas module further comprises a first gas quality analysis unit, the first gas quality analysis unit is arranged on the biogas conveying pipeline, and the first gas quality analysis unit is located between the first three-way valve and the first pressure regulating unit.

[0011] Optionally, the natural gas module further comprises a second pressure regulating unit and a second flow metering unit, the second pressure regulating unit and the second flow metering unit are sequentially arranged on the natural gas conveying pipeline in an upstream-to-downstream direction, and the second pressure regulating unit and the second flow metering unit are located between the second three-way valve and the mixing tank.

[0012] Optionally, the natural gas module further comprises a second gas quality analysis unit, the second gas quality analysis unit is arranged on the natural gas conveying pipeline, and the second gas quality analysis unit is located between the second three-way valve and the second pressure regulating unit.

[0013] Optionally, the mixed gas module further comprises a calorific value detection unit, a third gas quality analysis unit and a third flow metering unit, the calorific value detection unit, the third gas quality analysis unit and the third flow metering unit are sequentially arranged on the mixed conveying pipeline in an upstream-to-downstream direction.

[0014] Optionally, the mixed gas module further comprises a mixed conveying loop, an input end of the mixed conveying loop is connected with output ends of the calorific value detection unit and the third gas quality analysis unit, and an output end of the mixed conveying loop is connected with the mixing tank.

[0015] Optionally, the compressed natural gas module further comprises a shut-off valve, the shut-off valve is arranged on the compressed gas conveying pipeline, and the shut-off valve is located between the gas storage tank and the mixing tank.

[0016] Optionally, the biogas and natural gas combined peak shaving system further comprises a control center, the control center is electrically connected with execution components of the biogas module, the natural gas module, the compressed natural gas module and the mixed gas module.

[0017] Compared with the prior art, the biogas and natural gas combined peak shaving system has the beneficial effects that:

[0018] By setting the biogas module, the natural gas module, the compressed natural gas module and the mixed gas module, and configuring the linkage mode between the modules, when the gas use peak, the biogas, the natural gas and the compressed gas in the gas storage tank can enter the mixed tank for mixing, and enter the city pipe network through the mixed pipeline. When the gas use valley, the biogas as fuel enters the generator through the first three-way valve to drive the generator to generate electricity, and the generator supplies power to drive the compressor to compress the natural gas entering the compressor through the second three-way valve, so that the natural gas is compressed to form compressed gas to be stored in the gas storage tank, so that through the combined peak regulation of biogas and natural gas, not only the problem of tight natural gas source in some areas can be alleviated, but also the environmental protection, energy security and industrial upgrading can be promoted. BRIEF DESCRIPTION OF DRAWINGS

[0019] The technical scheme of the present application will be further described in detail below with reference to the drawings and embodiments, wherein:

[0020] Figure 1 The mixed structure schematic diagram of the combined peak regulation system of biogas and natural gas provided by the present application is shown.

[0021] The reference signs in the drawings are as follows:

[0022] 1, biogas module; 11, biogas conveying pipeline; 12, first three-way valve; 13, first pressure regulating unit; 14, first flow metering unit; 15, first gas quality analysis unit; 2, natural gas module; 21, natural gas conveying pipeline; 22, second three-way valve; 23, second pressure regulating unit; 24, second flow metering unit; 25, second gas quality analysis unit; 3, compressed natural gas module; 31, compressed gas conveying pipeline; 32, compressor; 33, gas storage tank; 34, generator; 35, stop valve; 4, mixed gas module; 41, mixed tank; 42, mixed pipeline; 43, calorific value detection unit; 44, third gas quality analysis unit; 45, third flow metering unit; 46, mixed return circuit; 5, control center. DETAILED DESCRIPTION

[0023] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The preferred embodiments of the present application will be described in detail with reference to the drawings.

[0024] The present application discloses a combined peak regulation system of biogas and natural gas, which comprises Figure 1As shown, the system includes a biogas module 21, a natural gas module 2, a compressed natural gas module 32, and a mixed gas module 4. The biogas module 21 includes a biogas delivery pipeline 2111 and a first three-way valve 12 disposed on the biogas delivery pipeline 2111. The natural gas module 2 includes a natural gas delivery pipeline 21 and a second three-way valve 22 disposed on the natural gas delivery pipeline 21. The compressed natural gas module 32 includes a compressed gas delivery pipeline 31 and a compressor 32 and a gas storage tank 33 disposed on the compressed gas delivery pipeline 31. The first three-way valve 12 is connected to a generator 34, and the generator 34 is electrically connected to the compressor 32. The second three-way valve 22 is connected to the compressor 32. The mixed gas module 4 includes a mixing tank 41 and a mixing delivery pipeline 42 connected to the mixing tank 41. The mixing delivery pipeline 42 is connected to a city pipeline network, and the biogas delivery pipeline 2111, the natural gas delivery pipeline 21, and the compressed gas delivery pipeline 31 are respectively connected to the mixing tank 41.

[0025] Through the implementation of the above-mentioned biogas and natural gas combined peak shaving system embodiment, by using different configuration modes among the biogas module 21, the natural gas module 2, the compressed natural gas module 32, and the mixed gas module 4, when the gas demand is high, the biogas, the natural gas, and the compressed gas in the gas storage tank 33 can be simultaneously introduced into the mixing tank 41 for mixing, and after mixing, the mixed gas is introduced into the city pipeline network through the mixing delivery pipeline 42, so as to increase the supply and use of natural gas, thereby relieving the tight natural gas supply in some areas. When the gas demand is low, by controlling the first three-way valve and the second three-way valve, the biogas can be used as fuel to enter the generator 34 through the first three-way valve to generate electricity, and the generator 34 is powered to drive the compressor 32 to compress the natural gas entering the compressor 32 through the second three-way valve, so that the natural gas is compressed to form compressed gas and stored in the gas storage tank 33, thereby storing natural gas as a backup when the demand for natural gas is not high, so as to make full use of existing energy sources and help to adapt to the changing demand of various types of gas users. Further, through the combined peak shaving of biogas and natural gas, not only can the problem of tight natural gas supply in some areas be relieved, but also environmental protection, energy security, and industrial upgrading can be promoted, which is an important way to achieve energy transformation and sustainable development goals.

[0026] Further, the biogas module 21 further includes a first pressure regulating unit 13 and a first flow metering unit 14. The first pressure regulating unit 13 and the first flow metering unit 14 are sequentially arranged on the biogas delivery pipeline 2111 in an upstream-to-downstream direction, and the first pressure regulating unit 13 and the first flow metering unit 14 are located between the first three-way valve 12 and the mixing tank 41.

[0027] Through the implementation of the above-mentioned embodiment of the combined peak shaving system of biogas and natural gas, the first pressure regulating unit 13 can ensure that the pressure of the biogas is properly regulated before the biogas enters the subsequent link. And the first flow metering unit 14 is located after the first pressure regulating unit 13, which can ensure that the gas pressure is stable when measuring the flow, thereby improving the accuracy of flow metering. Since pressure fluctuations may affect the readings of the flow meter, regulating the pressure first and then metering can reduce errors. Therefore, the biogas is metered before it enters the mixing tank 41 for mixing, which helps to monitor the biogas delivery of the entire system and also helps to quickly locate problems when the mixing tank 41 fails.

[0028] Further, the biogas module 21 further comprises a first gas quality analysis unit 15. The first gas quality analysis unit 15 is arranged on the biogas delivery pipeline 2111, and the first gas quality analysis unit 15 is located between the first three-way valve 12 and the first pressure regulating unit 13.

[0029] Through the implementation of the above-mentioned embodiment of the combined peak shaving system of biogas and natural gas, the arrangement of the first gas quality analysis unit 15 can perform real-time analysis after the biogas passes through the first three-way valve 12 and before it enters the first pressure regulating unit 13, which can accurately control the composition of the biogas, such as the methane content, impurity level, etc., and helps to ensure that the delivered biogas meets the specified quality standards. By detecting the gas composition early in the delivery process, potential gas quality problems or equipment failures can be detected in time, so that measures can be taken in advance to prevent the problem from getting worse.

[0030] Further, the natural gas module 2 further comprises a second pressure regulating unit 23 and a second flow metering unit 24. The second pressure regulating unit 23 and the second flow metering unit 24 are arranged in sequence along the upstream to downstream direction on the natural gas delivery pipeline, and the second pressure regulating unit 23 and the second flow metering unit 24 are located between the second three-way valve 22 and the mixing tank 41.

[0031] Through the implementation of the above-mentioned embodiment of the combined peak shaving system of biogas and natural gas, the second pressure regulating unit 23 can ensure that the pressure of the natural gas is properly regulated before the natural gas enters the subsequent link. And the second flow metering unit 24 is located after the second pressure regulating unit 23, which can ensure that the gas pressure is stable when measuring the flow, thereby improving the accuracy of flow metering. Since pressure fluctuations may affect the readings of the flow meter, regulating the pressure first and then metering can reduce errors. Therefore, the biogas is metered before it enters the mixing tank 41 for mixing, which helps to monitor the biogas delivery of the entire system and also helps to quickly locate problems when the mixing tank 41 fails.

[0032] Further, the natural gas module 2 further comprises a second gas quality analysis unit 25. The second gas quality analysis unit 25 is arranged on the natural gas conveying pipeline 21, and the second gas quality analysis unit 25 is located between the second three-way valve 22 and the second pressure regulating unit 23.

[0033] Through the implementation of the above-mentioned biological natural gas and natural gas combined peak shaving system embodiment, by arranging the second gas quality analysis unit 25, real-time analysis can be performed after the natural gas passes through the second three-way valve 22 and before entering the second pressure regulating unit 23, and the composition of the natural gas, such as the methane content and the impurity level, can be accurately controlled, which helps to ensure that the conveyed natural gas meets the specified quality standards. By detecting the gas composition early in the conveying process, potential gas quality problems or equipment failures can be detected in a timely manner, so that measures can be taken in advance to avoid the problem from expanding.

[0034] Further, the mixed gas module 4 further comprises a calorific value detection unit 43, a third gas quality analysis unit 44, and a third flow metering unit 45. The calorific value detection unit 43, the third gas quality analysis unit 44, and the third flow metering unit 45 are arranged in sequence along the upstream to downstream direction on the mixed conveying pipeline 42.

[0035] Through the implementation of the above-mentioned biological natural gas and natural gas combined peak shaving system embodiment, the calorific value detection unit 43 can measure the energy content of the mixed gas, which is crucial for evaluating the combustion performance and thermal efficiency of the mixed gas. By monitoring the change of the gas calorific value in real time, the energy quality of the mixed gas during the conveying process is ensured. By locating the third gas quality analysis unit 44 after the calorific value detection unit 43, the composition of the mixed gas can be further analyzed to ensure the stability of the quality of the mixed gas during the conveying process, and to avoid performance degradation or equipment damage due to changes in composition. By locating the third flow metering unit 45 after the gas quality analysis unit, flow metering can be performed after the composition and calorific value of the mixed gas are stable, which helps to improve the accuracy of flow metering, because changes in gas composition can affect the readings of the flow meter. Therefore, through accurate measurement of the calorific value and flow, energy use can be more effectively managed, and energy distribution and scheduling can be optimized.

[0036] Further, the mixed gas module 4 further comprises a mixed conveying loop 46. The input end of the mixed conveying loop 46 is connected to the output end of the calorific value detection unit 43 and the third gas quality analysis unit 44, and the output end of the mixed conveying loop 46 is connected to the mixed tank 41.

[0037] Through the implementation of the above-mentioned biological natural gas and natural gas combined peak shaving system embodiment, the mixed gas that does not meet the preset standard after detection by the calorific value detection unit 43 and the third gas quality analysis unit 44 can be returned to the mixing tank 41 for re-mixing by using the mixed transportation circuit 46. By continuously detecting the mixed gas, the composition of the gas can be continuously calibrated and analyzed during actual transportation, improving the accuracy and reliability of detection to ensure that the final output mixed gas meets the expected quality standards, and to stabilize the quality.

[0038] Further, the compressed natural gas module 32 further includes a shut-off valve 35. The shut-off valve 35 is arranged on the compressed gas delivery pipeline 31, and the shut-off valve 35 is located between the gas storage tank 33 and the mixing tank 41.

[0039] Through the implementation of the above-mentioned biological natural gas and natural gas combined peak shaving system embodiment, by arranging the shut-off valve 35, the flow of compressed gas can be accurately controlled, and by adjusting the flow of compressed gas, the delivery rate can be adjusted according to the needs of various types of gas users, thereby improving the response speed and efficiency of the system. And by closing the valve, the gas flow between the gas storage tank 33 and the mixing tank 41 can be quickly isolated, in the event of a leak, equipment failure or emergency stop operation, the shut-off valve 35 can be quickly closed to prevent natural gas from continuing to flow, reducing the risk of leakage and potential explosion or fire hazards, which is crucial for maintenance and safe operation in emergency situations.

[0040] Further, the biological natural gas and natural gas combined peak shaving system further includes a control center 5, and the control center 5 is electrically connected with the execution components of the biological natural gas module 21, the natural gas module 2, the compressed natural gas module 32 and the mixed gas module 4 respectively.

[0041] Through the implementation of the above-mentioned biological natural gas and natural gas combined peak shaving system embodiment, the control center 5 is preferably based on the SCADA system, and by linking each execution component of the biological natural gas module 21, the natural gas module 2, the compressed natural gas module 32 and the mixed gas module 4, such as the first three-way pipe valve 12, the first gas quality analysis unit 15, the first pressure regulating unit 13, the first flow metering unit 14, the second three-way pipe valve 22, the second gas quality analysis unit 25, the second pressure regulating unit 23, the second flow metering unit 24, the generator 34, the compressor 32, the gas storage tank 33, the stop valve 35, the mixing tank 41, the calorific value detection unit 43, the third gas quality analysis unit 44 and the third flow metering unit 45, etc. on the SCADA system, the SCADA system can monitor the state of all execution components in real time, including the flow, pressure, temperature, flow and other key parameters of natural gas, thereby providing centralized monitoring capability, so that the operator can make quick decisions quickly, improving the overall operation efficiency. At the same time, it can detect abnormal conditions in real time, such as excessively high or low pressure, abnormal flow, etc., and immediately issue an alarm to reduce the risk of accidents. Help the operator understand the long-term running trend of the system, carry out predictive maintenance, reduce downtime and improve the reliability of the system.

[0042] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some technical features can be replaced by equivalents; all these modifications and replacements should belong to the protection scope of the appended claims of the present application.

Claims

1. A biogas and natural gas combined peak shaving system, characterized in that, The biological natural gas and natural gas combined peak shaving system comprises: a biological natural gas module comprising a biological natural gas conveying pipeline and a first three-way pipe valve arranged on the biological natural gas conveying pipeline; a natural gas module comprising a natural gas conveying pipeline and a second three-way pipe valve arranged on the natural gas conveying pipeline; a compressed natural gas module comprising a compressed gas conveying pipeline, a compressor and a gas storage tank arranged on the compressed gas conveying pipeline, an outlet end of the first three-way pipe valve being connected with a generator, and the generator being electrically connected with the compressor, and an outlet end of the second three-way pipe valve being butted against the compressor; a mixed gas module comprising a mixing tank and a mixing conveying pipeline butted against the mixing tank, the mixing conveying pipeline being butted against a city pipeline network, and the biological natural gas conveying pipeline, the natural gas conveying pipeline and the compressed gas conveying pipeline being butted against the mixing tank.

2. The biogas and natural gas co-peak shaving system according to claim 1, characterized in that: The biological natural gas module further comprises a first pressure regulating unit and a first flow metering unit, the first pressure regulating unit and the first flow metering unit being arranged on the biological natural gas conveying pipeline in sequence in an upstream-to-downstream direction, and the first pressure regulating unit and the first flow metering unit being located between the first three-way pipe valve and the mixing tank.

3. The biogas-natural gas peak shaving system of claim 2, wherein: The biological natural gas module further comprises a first gas quality analyzing unit, the first gas quality analyzing unit being arranged on the biological natural gas conveying pipeline, and the first gas quality analyzing unit being located between the first three-way pipe valve and the first pressure regulating unit.

4. The biogas and natural gas co-peak shaving system according to claim 1, characterized in that: The natural gas module further comprises a second pressure regulating unit and a second flow metering unit, the second pressure regulating unit and the second flow metering unit being arranged on the natural gas conveying pipeline in sequence in an upstream-to-downstream direction, and the second pressure regulating unit and the second flow metering unit being located between the second three-way pipe valve and the mixing tank.

5. The biogas and natural gas co-peak shaving system according to claim 4, characterized in that: The natural gas module further comprises a second gas quality analyzing unit, the second gas quality analyzing unit being arranged on the natural gas conveying pipeline, and the second gas quality analyzing unit being located between the second three-way pipe valve and the second pressure regulating unit.

6. The biogas and natural gas co-peak shaving system according to claim 1, characterized in that: The mixed gas module further comprises a calorific value detecting unit, a third gas quality analyzing unit and a third flow metering unit, the calorific value detecting unit, the third gas quality analyzing unit and the third flow metering unit being arranged on the mixing conveying pipeline in sequence in an upstream-to-downstream direction.

7. The biogas and natural gas co-peak shaving system according to claim 6, characterized in that: The mixed gas module further comprises a mixing conveying loop, input ends of the mixing conveying loop being connected with output ends of the calorific value detecting unit and the third gas quality analyzing unit respectively, and an output end of the mixing conveying loop being butted against the mixing tank.

8. The biogas and natural gas co-peak shaving system according to claim 1, characterized in that: The compressed natural gas module further comprises a stop valve, the stop valve being arranged on the compressed gas conveying pipeline, and the stop valve being located between the gas storage tank and the mixing tank.

9. The system for biogas and natural gas peak shaving according to any one of claims 1-8, characterized in that: The biological natural gas and natural gas combined peak shaving system further comprises a control center, the control center being electrically connected with execution components of the biological natural gas module, the natural gas module, the compressed natural gas module and the mixed gas module respectively.

Images