Device for introducing biological natural gas into urban pipe network

Abstract

The utility model belongs to the technical field of biogas application, and particularly relates to a device for biogas to enter an urban pipe network, which comprises a biogas generating component, a gas outlet end of the biogas generating component is communicated with the urban pipe network, and a monitoring component is arranged between the biogas generating component and the urban pipe network. The monitoring assembly is used for monitoring parameter indexes of biogas before the biogas enters an urban pipe network, and a biogas path selection assembly is arranged between the monitoring assembly and the urban pipe network and used for merging the biogas into the urban pipe network or returning the biogas to the biogas generation assembly through a biogas loop according to the result of the monitoring assembly. And the gas inlet end of the urban pipe network is also provided with a biogas regulation and control assembly for regulating the pressure and the concentration of the biogas. The unit can monitor various parameter indexes of the biogas in real time before the biogas is merged into an urban pipe network, and the quality requirement of the biogas before the biogas is merged into the urban pipe network is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of application of biogas, and specifically relates to a device for introducing biogas into a city pipe network. Background Art

[0002] Biogas refers to green, low-carbon, clean, renewable, unconventional natural gas produced through conversion, purification and refining of various urban and rural organic wastes such as crop straw, livestock and poultry manure, domestic garbage, and industrial organic wastewater. Its main component is methane. my country's biogas projects are mostly restricted by downstream pipeline conditions, and mainly focus on CNG vehicles. However, with the popularization of electric vehicles, whether the CNG utilization method and profitability of biogas are in line with my country's energy development status remains to be verified. Therefore, the current application of biogas is still in the development and exploration stage.

[0003] In order to alleviate the shortage of natural gas sources in some areas, the integration of biogas into urban gas pipelines is an energy-saving solution to replace traditional natural gas. However, due to the impurities and pollutants contained in the biogas after it is generated, as well as the instability of the biogas pressure and concentration, it cannot be directly transported to the urban gas pipeline. Therefore, it is necessary to monitor and analyze various parameters of biogas, strictly control the content of impurities and pollutants in biogas, and control the pressure and concentration of biogas, to ensure that the quality requirements of biogas before entering the network can meet the use standards, so as not to affect the safety of users and the health of personnel. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the purpose of the utility model is to provide a device for feeding biogas into the urban pipeline network. A variety of monitoring equipment are installed in the biogas pipeline to monitor various parameters of biogas in real time to ensure the quality requirements of biogas before entering the network.

[0005] The technical solution of the utility model is:

[0006] A biogas entering urban pipe network device, used for incorporating qualified biogas into the urban pipe network, comprises a biogas generation component, and also comprises:

[0007] A biogas path selection component is arranged between the biogas generation component and the urban pipeline network, the biogas path selection component has an air inlet end and two air outlet ends, the air inlet end of the biogas path selection component is connected to the air outlet end of the biogas generation component, one air outlet end of the biogas path selection component is connected to the urban pipeline network, the other air outlet end is connected to one end of the biogas circuit, and the other end of the biogas circuit is connected to the air inlet end of the biogas generation component;

[0008] A monitoring component is arranged between the gas outlet of the biogas generation component and the gas inlet of the biogas path selection component, and the monitoring component is used to monitor the parameter indicators of the biogas before entering the urban pipeline network. If the biogas parameter indicators are qualified, the gas outlet of the biogas generation component is connected to the urban pipeline network through the biogas path selection component. If the biogas parameter indicators are unqualified, the gas outlet of the biogas generation component is connected to the biogas loop through the biogas path selection component.

[0009] The biogas regulating and controlling component is arranged at the air inlet end of the urban pipe network, and the biogas regulating and controlling component is used to adjust the pressure and concentration of the biogas.

[0010] Preferably, the monitoring component is arranged on the biogas pipeline, the air inlet end of the biogas pipeline is connected to the air outlet end of the biogas generation component, the air outlet end of the biogas pipeline is connected to the air inlet end of the biogas path selection component, and the monitoring component includes a CO2 content detector, a water content detector, a sulfur content detector, a pressure gauge, a flow meter and a thermometer which are sequentially arranged on the biogas pipeline.

[0011] Preferably, the biogas path selection component includes a tee, which is respectively connected to the outlet end of the biogas pipeline, the inlet end of the biogas loop and the inlet end of the urban pipeline network; a first stop valve is provided at the connecting end of the tee and the urban pipeline network, and a second stop valve is provided at the connecting end of the tee and the biogas loop.

[0012] Preferably, a biogas inlet branch is provided at the air inlet end of the urban pipeline network, one end of the biogas inlet branch is connected to an air outlet end of the three-way pipe, and the other end is connected to the air inlet end of the urban pipeline network, the first stop valve is arranged at the connecting end of the biogas inlet branch and the three-way pipe, and the biogas regulation component is arranged on the biogas inlet branch.

[0013] Preferably, the biogas control component includes a pressure regulating and metering unit, which is installed on the biogas inlet branch and is used for pressure control and flow metering of the biogas before it enters the urban pipeline network. The pressure regulating and metering unit is provided with an automatic release module, which is connected to the biogas inlet branch and is used for automatically releasing gas pressure when the biogas exceeds the set pressure.

[0014] Preferably, the biogas regulation component also includes a mixing unit, which is located between the pressure regulating and metering unit and the urban pipeline network, the air inlet of the mixing unit is connected to the pure natural gas tank, and the air outlet of the mixing unit is connected to the biogas network inlet branch, and the mixing unit is used for mixing biogas and pure natural gas.

[0015] Preferably, a calorific value detector is also provided on the biogas inlet branch, and the calorific value detector is located between the mixing unit and the urban pipeline network, and is used for real-time monitoring of the calorific value of the mixed gas.

[0016] Preferably, an odorizing unit is further provided on the biogas inlet branch, and the odorizing unit is located between the calorific value detector and the urban pipe network, and the odorizing unit is used to odorize the mixed gas.

[0017] Preferably, the biogas loop is further provided with a biogas venting branch, the biogas venting branch is provided with a third stop valve, and a biogas processing valve is provided between the third stop valve and the second stop valve.

[0018] Preferably, the biogas generation component includes a fermentation tank, a purification unit and a gas storage tank, the solid material outlet of the fermentation tank is connected to the purification unit, the gas outlets of the fermentation tank and the purification unit are both connected to the gas storage tank, the gas outlet of the gas storage tank is connected to the air inlet end of the monitoring component, and the gas outlet end of the biogas loop is connected to the air inlet end of the purification unit.

[0019] Compared with the prior art, the biogas entering urban pipe network device of the utility model has the following beneficial effects:

[0020] This device cooperates with other components such as monitoring components, biogas control components and biogas loops between the biogas generation components and the urban pipeline network, and has a variety of monitoring equipment installed in the biogas pipeline. It can monitor various biogas parameter indicators in real time before the biogas enters the urban pipeline network, and adjust the gas quality and concentration before entering the network through the biogas control components, thereby ensuring the quality requirements of the biogas before entering the network. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the natural gas entering the urban pipeline network unit in the embodiment of the utility model.

[0022] Description of reference numerals:

[0023] 1. Fermentation tank; 2. Purification unit; 3. Gas storage tank; 4. CO2 content detector; 5. Water content detector; 6. Sulfur content detector; 7. Pressure gauge; 8. Flow meter; 9. Thermometer; 10. First stop valve; 11. Second stop valve; 12. Biogas processing valve; 13. Third stop valve; 14. Pressure regulating and metering unit; 15. Automatic release module; 16. Mixing unit; 17. Calorific value detector; 18. Odorizing unit; 19. Meter; 20. Biogas pipeline; 21. Biogas venting branch; 22. Biogas loop; 23. Biogas network access branch. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0026] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] See also Figure 1As shown, in order to monitor various parameters of biogas in real time before biogas is incorporated into the urban pipeline network and ensure the quality requirements of biogas before it is incorporated into the network, this embodiment provides a biogas inlet urban pipeline network device for incorporating qualified biogas into the urban pipeline network, including a biogas generation component, the biogas generation component is arranged in a biogas processing plant, the gas outlet end of the biogas generation component is connected to the urban pipeline network, and then a biogas path selection component is arranged between the biogas generation component and the urban pipeline network, the biogas path selection component has an air inlet end and two air outlet ends, the air inlet end of the biogas path selection component is connected to the air outlet end of the biogas generation component, and then one of the air outlet ends of the biogas path selection component is connected to the air outlet end of the biogas generation component. One end is connected to the urban pipeline network, the other gas outlet end is connected to one end of the biogas loop 22, the other end of the biogas loop 22 is connected to the gas inlet end of the biogas generation component, and a monitoring component is provided between the gas outlet end of the biogas generation component and the gas inlet end of the biogas path selection component. The monitoring component is used to monitor the parameter indicators of the biogas before entering the urban pipeline network. When the biogas output from the biogas generation component is qualified after being monitored by the monitoring component, the biogas enters the urban pipeline network through the biogas path selection component. If the monitoring is unqualified, the biogas enters the biogas loop 22 through the biogas path selection component, and returns to the biogas production component through the biogas loop 22 to realize re-fermentation.

[0028] Furthermore, a biogas control component is provided at the air inlet end of the urban pipeline network to adjust the concentration and pressure of the biogas before it is incorporated into the urban pipeline network, so as to ensure that the biogas after entering the network meets the user's usage standards.

[0029] The specific biogas path selection component includes a tee pipe, which is respectively connected to the outlet end of the biogas pipeline 20, the inlet end of the biogas loop 22 and the inlet end of the urban pipeline network. The connecting end of the tee pipe and the urban pipeline network is provided with a first stop valve 10, and the connecting end of the tee pipe and the biogas loop 22 is provided with a second stop valve 11.

[0030] See also Figure 1 As shown, further, the device also includes a biogas pipeline 20, the air inlet end of the biogas pipeline 20 is connected to the air outlet end of the biogas generation component, the air outlet end of the biogas pipeline 20 is connected to the air inlet end of the urban pipeline network, the monitoring component is arranged on the biogas pipeline 20, and the monitoring component includes a CO2 content detector 4, a water content detector 5, a sulfur content detector 6, a pressure gauge 7, a flow meter 8 and a thermometer 9 which are sequentially arranged on the biogas pipeline 20.

[0031] See also Figure 1As shown, a biogas inlet branch 23 is provided at the air inlet end of the urban pipeline network, one end of the biogas inlet branch 23 is connected to an outlet end of the three-way pipe, and the other end is connected to the air inlet end of the urban pipeline network, a first stop valve 10 is arranged at the connecting end of the biogas inlet branch 23 and the three-way pipe, and a biogas regulating component is arranged on the biogas inlet branch 23.

[0032] See also Figure 1 As shown, the biogas control component includes a pressure regulating and metering unit 14, which is installed on the biogas inlet branch 23. The pressure regulating and metering unit 14 is used to control the pressure and flow meter 8 of the biogas before it enters the urban pipeline network. The pressure regulating and metering unit 14 is provided with an automatic release module 15, which is connected to the biogas inlet branch 23 and is used to automatically release the gas pressure when the biogas exceeds the set pressure.

[0033] See also Figure 1 As shown, the biogas control component also includes a mixing unit 16, which is located between the pressure regulating and metering unit 14 and the urban pipeline network. The air inlet of the mixing unit 16 is connected to the pure natural gas tank, and the air outlet of the mixing unit 16 is connected to the biogas network branch 23. The mixing unit 16 is used to mix biogas and pure natural gas. Since the purity of biogas is not enough and cannot be directly provided to users, it must be mixed with pure natural gas in a certain proportion before entering the urban pipeline network to meet the usage standards.

[0034] See also Figure 1 As shown, a calorific value detector 17 is also provided on the biogas inlet branch 23. The calorific value detector 17 is located between the mixing unit 16 and the urban pipe network. The calorific value detector 17 is used to monitor the calorific value of the mixed gas in real time. When the calorific value is less than or greater than a preset value, a signal is transmitted to the SCADA system of the natural gas processing plant, and then the mixing unit 16 is controlled to re-mix the biogas and the pure natural gas.

[0035] See also Figure 1 As shown, an odorizing unit 18 is also provided on the biogas inlet branch 23. The odorizing unit 18 is located between the calorific value detector 17 and the urban pipe network. The odorizing unit 18 is used to odorize the mixed gas.

[0036] See also Figure 1 As shown, a meter 19 is also provided on the biogas inlet branch 23. The meter 19 is located between the odorizing unit 18 and the urban pipe network. The meter 19 is used to measure the flow of the mixed gas for subsequent charging.

[0037] See also Figure 1As shown, a biogas venting branch 21 is also provided on the biogas loop 22 , a third stop valve 13 is provided on the biogas venting branch 21 , and a biogas processing valve 12 is provided between the third stop valve 13 and the second stop valve 11 .

[0038] See also Figure 1 As shown, the biogas generation component includes a fermentation tank 1, a purification unit 2 and a gas storage tank 3. The solid material outlet of the fermentation tank 1 is connected to the purification unit 2, and the gas outlets of the fermentation tank 1 and the purification unit 2 are both connected to the gas storage tank 3. The gas outlet of the gas storage tank 3 is connected to the air inlet end of the monitoring component, and the gas outlet end of the biogas loop 22 is connected to the air inlet end of the purification unit 2.

[0039] A SCADA system is installed in the biogas processing plant. The CO2 content detector 4, water content detector 5, sulfur content detector 6, pressure gauge 7, flow meter 8, thermometer 9, first stop valve 10 on the above-mentioned biogas pipeline 20, the second stop valve 11 on the biogas loop 22, and the third stop valve 13 on the biogas vent branch 21 are all connected to the SCADA system, so that the biogas exhaust gas can be intelligently controlled.

[0040] The implementation method of this device:

[0041] The biogas generation component inputs the generated biogas into the biogas pipeline 20, and the biogas is tested by the CO2 content detector 4, water content detector 5, sulfur content detector 6, pressure gauge 7, flow meter 8, thermometer 9 and other instruments on the biogas pipeline 20; when the biogas quality test is qualified and meets the network access requirements, the second stop valve 11 and the third stop valve 13 are closed, and the biogas enters the biogas network access branch 23 through the first stop valve 10, enters the mixing unit 16 through the pressure regulating metering unit 14 to mix with natural gas, enters the odorizing unit 18 for odorization after passing the calorific value detector 17, and then enters the urban pipeline network; when the biogas quality does not meet the network access requirements, the first stop valve 10 is closed, the second stop valve 11 or the third stop valve 13 is opened, and the unqualified biogas enters the purification unit 2 through the second stop valve 11, or is vented through the third stop valve 13. Therefore, the design of the above-mentioned pipeline unit can effectively ensure the quality requirements of biogas incorporation into the urban pipeline network, ensure the safety of biogas use, and avoid affecting the health of personnel.

[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A biogas entering urban pipe network device, used to introduce qualified biogas into the urban pipe network, comprising a biogas generation component, characterized in that: Also includes: A biogas path selection component is arranged between the biogas generation component and the urban pipeline network, the biogas path selection component has an air inlet end and two air outlet ends, the air inlet end of the biogas path selection component is connected to the air outlet end of the biogas generation component, one air outlet end of the biogas path selection component is connected to the urban pipeline network, the other air outlet end is connected to one end of a biogas circuit (22), and the other end of the biogas circuit (22) is connected to the air inlet end of the biogas generation component; A monitoring component is arranged between the gas outlet of the biogas generation component and the gas inlet of the biogas path selection component, and the monitoring component is used to monitor the parameter index of the biogas before it enters the urban pipeline network. If the biogas parameter index is qualified, the gas outlet of the biogas generation component is connected to the urban pipeline network through the biogas path selection component. If the biogas parameter index is unqualified, the gas outlet of the biogas generation component is connected to the biogas circuit (22) through the biogas path selection component. The biogas regulating and controlling component is arranged at the air inlet end of the urban pipe network, and the biogas regulating and controlling component is used to adjust the pressure and concentration of the biogas.

2. The biogas entering urban pipe network device according to claim 1 is characterized in that: The monitoring component is arranged on a biogas pipeline (20); the gas inlet end of the biogas pipeline (20) is connected to the gas outlet end of the biogas generation component; the gas outlet end of the biogas pipeline (20) is connected to the gas inlet end of the biogas path selection component; the monitoring component comprises a CO2 content detector (4), a water content detector (5), a sulfur content detector (6), a pressure gauge (7), a flow meter (8) and a thermometer (9) which are arranged in sequence on the biogas pipeline (20).

3. The biogas entering urban pipe network device according to claim 2 is characterized in that: The biogas path selection component comprises a three-way pipe, which is respectively connected to the gas outlet end of the biogas pipeline (20), the gas inlet end of the biogas circuit (22) and the gas inlet end of the urban pipe network; the connection end of the three-way pipe and the urban pipe network is provided with a first stop valve (10), and the connection end of the three-way pipe and the biogas circuit (22) is provided with a second stop valve (11).

4. The biogas entering urban pipe network device according to claim 3 is characterized in that: A biogas inlet branch (23) is provided at the gas inlet end of the urban pipe network, one end of the biogas inlet branch (23) is connected to a gas outlet end of the three-way pipe, and the other end is connected to the gas inlet end of the urban pipe network, the first stop valve (10) is provided at the connection end between the biogas inlet branch (23) and the three-way pipe, and the biogas regulating component is provided on the biogas inlet branch (23).

5. The biogas entering urban pipe network device according to claim 4 is characterized in that: The biogas control component comprises a pressure regulating and metering unit (14), which is installed on the biogas inlet branch (23), and is used for controlling the pressure and flow meter (8) of the biogas before it enters the urban pipe network. The pressure regulating and metering unit (14) is provided with an automatic release module (15), which is connected to the biogas inlet branch (23) and is used for automatically releasing the gas to relieve pressure when the biogas exceeds a set pressure.

6. The biogas entering urban pipe network device according to claim 5 is characterized in that: The biogas control component also includes a mixing unit (16), which is located between the pressure regulating and metering unit (14) and the urban pipeline network. The air inlet of the mixing unit (16) is connected to the pure natural gas tank, and the air outlet of the mixing unit (16) is connected to the biogas network inlet branch (23). The mixing unit (16) is used for mixing biogas and pure natural gas.

7. The device for introducing biogas into a city pipe network according to claim 6, characterized in that: A calorific value detector (17) is also provided on the biogas inlet branch (23). The calorific value detector (17) is located between the mixing unit (16) and the urban pipe network. The calorific value detector (17) is used to monitor the calorific value of the mixed gas in real time.

8. The device for introducing biogas into a city pipe network according to claim 7, characterized in that: The biogas inlet branch (23) is also provided with an odorizing unit (18), the odorizing unit (18) is located between the calorific value detector (17) and the urban pipe network, and the odorizing unit (18) is used to perform odorizing treatment on the mixed gas.

9. The biogas entering urban pipe network device according to claim 3 is characterized in that: The biogas circuit (22) is also provided with a biogas venting branch (21), the biogas venting branch (21) is provided with a third stop valve (13), and a biogas processing valve (12) is provided between the third stop valve (13) and the second stop valve (11).

10. The device for introducing biogas into a city pipe network according to claim 1, characterized in that: The biogas generation component comprises a fermentation tank (1), a purification unit (2) and a gas storage tank (3); the solid material outlet of the fermentation tank (1) is connected to the purification unit (2); the gas outlets of the fermentation tank (1) and the purification unit (2) are both connected to the gas storage tank (3); the gas outlet of the gas storage tank (3) is connected to the gas inlet end of the monitoring component; and the gas outlet end of the biogas circuit (22) is connected to the gas inlet end of the purification unit (2).

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