Electric energy gas system with high safety performance and spray tower using electric energy gas system

Abstract

The utility model discloses an electric energy gas system with high safety performance and a spray tower using the electric energy gas system. The electric energy gas system comprises a hydrogen pipeline, a natural gas pipeline, a hydrogen-doped burner, a fire retardant assembly, a PLC (Programmable Logic Controller) control system and a pipeline pressure regulating assembly, the output end of the natural gas pipeline is communicated with the input end of the hydrogen-doped burner, the hydrogen pipeline comprises a hydrogen main pipe and hydrogen branch pipes, the hydrogen main pipe is communicated with the hydrogen generating device, the hydrogen main pipe is respectively communicated with the input ends of the hydrogen branch pipes, and the hydrogen branch pipes are communicated with the hydrogen-doped burner. The plurality of hydrogen branch pipes are in one-to-one correspondence with the plurality of hydrogen-doped combustors; the pipeline pressure regulating assembly is installed on the hydrogen main pipe, and the hydrogen main pipe and the hydrogen branch pipes are each provided with a fire retardant assembly. The hydrogen directly enters the combustion chamber only from the tail end of the hydrogen-doped combustor, so that the probability that the hydrogen is affected by other potential ignition sources in a pipeline system is reduced, and the situation that the hydrogen and natural gas are mixed in a pipeline and then explode is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen-doped pipelines, in particular to an electric energy and gas system with high safety performance and a spray tower using the same. Background Art

[0002] Against the backdrop of global efforts to protect the environment and conserve energy, the industrial sector is actively exploring and implementing various energy-saving and emission-reduction measures. Among these, the use of a hydrogen-blended gas, a mixture of hydrogen and natural gas, as fuel for combustion of workpieces can significantly reduce the emission of harmful substances in exhaust and tail gas, playing a significant role in improving air quality and mitigating the greenhouse effect.

[0003] The existing process typically involves pre-mixing hydrogen and natural gas at a location away from the point of use. This mixture is then transported through a pipeline system to a spray gun or other combustion device for combustion. This centralized mixing and delivery method did meet basic production needs in the early stages, but with the continuous expansion of industrial production, especially the increasing output of equipment such as spray towers, the demand for hydrogen-blended mixed gases has also increased dramatically.

[0004] However, as the flow rate of hydrogen-doped gas in pipelines increases, the potential risk of explosion also increases significantly. An explosion would not only cause serious harm to personnel and equipment, but also cause extensive damage to the surrounding environment. Furthermore, an explosion could disrupt production, resulting in significant economic losses for the company. Utility Model Content

[0005] In response to the above-mentioned defects, the present invention proposes an electric gas system with high safety performance and a spray tower using the same. Hydrogen enters the combustion chamber directly only at the end of the hydrogen-blending burner, which means that hydrogen is mixed and burned with natural gas at a position close to the combustion point, reducing the chance of hydrogen being affected by other potential ignition sources in the pipeline system, effectively avoiding the mixing of hydrogen and natural gas in the pipeline and then exploding, and preliminarily solving the problem of the high explosion risk of hydrogen-blended mixed gas.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] An electric energy and gas system with high safety performance, including a hydrogen pipeline, a natural gas pipeline, a hydrogen-blending burner, a flame arrester component, a PLC control system and a pipeline pressure regulating component;

[0008] The output end of the natural gas pipeline is connected to the input end of the hydrogen-blending burner, and the hydrogen pipeline includes a hydrogen main pipe and a hydrogen branch pipe. The input end of the hydrogen main pipe is connected to the hydrogen generating device, and the output end of the hydrogen main pipe is respectively connected to the input ends of the plurality of hydrogen branch pipes. The output end of the hydrogen branch pipe is connected to the input end of the hydrogen-blending burner, and the plurality of hydrogen branch pipes correspond to the plurality of hydrogen-blending burners one by one.

[0009] The pipeline pressure regulating assembly is installed on the hydrogen main pipe, the hydrogen main pipe and the hydrogen branch pipe are both installed with the fire-blocking assembly, and the PLC control system is electrically connected to the fire-blocking assembly and the pipeline pressure regulating assembly respectively.

[0010] The fire arrester assembly includes a fire arrester and a fire arrester. The fire arrester is installed at the end of the hydrogen main pipe, and the fire arrester is installed at the hydrogen branch pipe.

[0011] The regulating component includes a throttle valve, a low-pressure sensor and a high-pressure sensor in sequence along the flow direction of the hydrogen;

[0012] The PLC control system is electrically connected to the throttle valve, the low-pressure sensor, and the high-pressure sensor, respectively. The throttle valve is used to regulate the overall pressure of the hydrogen main pipe. The low-pressure sensor is used to detect whether the pressure of the hydrogen main pipe is lower than a set value. The high-pressure sensor is used to detect whether the pressure of the hydrogen main pipe is higher than a set value.

[0013] A ball valve, a pressure sensor and a filter are sequentially arranged between the hydrogen generator and the throttle valve. The ball valve is used to manually open or close the hydrogen pipeline; the filter is used to filter impurities in the hydrogen pipeline.

[0014] An electromagnetic shut-off valve is provided between the high-pressure sensor and the flame arrester, and the electromagnetic shut-off valve is electrically connected to the PLC control system.

[0015] A regulating valve is provided between the flame arrester and the input end of the hydrogen branch pipe. The regulating valve is electrically connected to the PLC control system and is used to adjust the pressure value in the hydrogen pipeline to a set value.

[0016] The natural gas pipeline includes a natural gas main pipe and a natural gas branch pipe. The output end of the natural gas main pipe is respectively connected to the input ends of a plurality of natural gas branch pipes, and the output ends of the natural gas branch pipes are connected to the input end of the hydrogen-blending burner.

[0017] A pressure relief air defense valve is provided between the low-pressure sensor and the high-pressure sensor. The pressure relief air defense valve is electrically connected to the PLC control system and is used for the gas in the hydrogen main pipe.

[0018] A spray tower uses the electric energy and gas system with high safety performance.

[0019] The technical solution of the utility model may have the following beneficial effects:

[0020] 1. The pipeline pressure regulating assembly can monitor and control the operating status of these key components in real time, and the flame arrester assembly can effectively control the fire and prevent the flame from spreading along the hydrogen pipeline. Therefore, when the system detects an abnormality such as excessive pressure, abnormal temperature, or signs of flame spread, the PLC control system can respond quickly, closing the corresponding valve or activating the safety protection mechanism to promptly eliminate the safety hazard.

[0021] 2. The pipeline pressure regulating assembly can accurately control the supply of hydrogen, thereby providing the hydrogen-blending burner with a precise proportion of mixed gas, ensuring that the hydrogen-blending burner can achieve the best combustion efficiency.

[0022] 3. Since hydrogen generators use electricity to decompose water to produce hydrogen, the supply of hydrogen is closely tied to the availability of electricity. In practice, electricity availability may fluctuate depending on factors such as season, time of day, and demand. When electricity is tight, hydrogen production may be affected. The electric gas system can adjust the hydrogen supply based on electricity availability and increase the natural gas supply. This ensures a stable gas supply under varying electricity supply conditions, thereby ensuring temperature control in the spray tower and ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of an electric energy and gas system according to one embodiment of the present invention;

[0024] Among them, 1. Hydrogen pipeline; 11. Hydrogen main pipe; 12. Hydrogen branch pipe; 2. Natural gas pipeline; 21. Natural gas main pipe; 22. Natural gas branch pipe; 3. Hydrogen-blended burner; 4. Flame arrester assembly; 41. Flame arrester; 42. Flame arrester; 5. Pipeline pressure regulating assembly; 51. Ball valve; 52. Pressure sensor; 53. Filter; 54. Throttle valve; 55. Low-pressure sensor; 56. Pressure relief air defense valve; 57. High-pressure sensor; 58. Solenoid shut-off valve; 59. Control valve; 6. Hydrogen generator. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0026] In the description of the present invention, it should be understood that the terms "length", "middle", "upper", "lower", "left", "right", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation on the present invention.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means more than two.

[0028] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "installation," "splicing," and "connection" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; they may refer to direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] The following combination Figure 1 , describing an electric energy and gas system with high safety performance and a spray tower using the same according to an embodiment of the present invention.

[0030] An electric energy and gas system with high safety performance includes a hydrogen pipeline 1, a natural gas pipeline 2, a hydrogen-blending burner 3, a flame arrester component 4, a PLC control system, and a pipeline pressure regulating component 5;

[0031] The output end of the natural gas pipeline 2 is connected to the input end of the hydrogen-blending burner 3. The hydrogen pipeline 1 includes a hydrogen main pipe 11 and a hydrogen branch pipe 12. The input end of the hydrogen main pipe 11 is connected to the hydrogen generator 6. The output end of the hydrogen main pipe 11 is respectively connected to the input ends of the plurality of hydrogen branch pipes 12. The output end of the hydrogen branch pipe 12 is connected to the input end of the hydrogen-blending burner 3. The plurality of hydrogen branch pipes 12 correspond one to one to the plurality of hydrogen-blending burners 3.

[0032] The pipeline pressure regulating assembly 5 is installed on the hydrogen main pipe 11 , and the hydrogen main pipe 11 and the hydrogen branch pipe 12 are both installed with the fire arrester assembly 4 . The PLC control system is electrically connected to the fire arrester assembly 4 and the pipeline pressure regulating assembly 5 , respectively.

[0033] The hydrogen pipeline 1, featuring a main hydrogen pipe 11 and multiple branch hydrogen pipes 12, rapidly transports hydrogen from the hydrogen generator 6 to each hydrogen-blending burner 3. When the system needs to increase or decrease the hydrogen supply, the PLC control system responds quickly, ensuring that the hydrogen-blending burners 3 receive the required hydrogen promptly, improving the operating efficiency and responsiveness of the electric and gas system.

[0034] Moreover, hydrogen directly enters the combustion chamber only at the end of the hydrogen-blending burner 3, which means that hydrogen is mixed with natural gas and burned at a position close to the combustion point, reducing the chance of hydrogen being affected by other potential ignition sources in the pipeline system, effectively avoiding the mixing of hydrogen and natural gas in the pipeline and then exploding, and preliminarily solving the problem of the high explosion risk of hydrogen-blended mixed gas.

[0035] To further enhance the safety of this solution's electric and gas system, a flame arrester assembly 4 and a pipeline pressure regulator assembly 5 are installed within hydrogen pipeline 1. The pipeline pressure regulator 5 monitors and controls the operating status of these key components in real time, while the flame arrester 4 effectively controls the spread of fire along hydrogen pipeline 1. Therefore, when the system detects an abnormality, such as excessive pressure, abnormal temperature, or signs of flame spread, the PLC control system can quickly respond by closing the corresponding valves or activating safety protection mechanisms, promptly eliminating potential safety hazards and further addressing the high explosion risk and low safety performance of hydrogen-blended pipelines.

[0036] In addition, the pipeline pressure regulating assembly 5 can accurately control the supply of hydrogen, thereby providing the hydrogen-blending burner 3 with a mixed gas of a precise proportion, ensuring that the hydrogen-blending burner 3 can achieve optimal combustion efficiency.

[0037] The fire arrester assembly 4 includes a fire arrester 41 and a fire arrester 42 . The fire arrester 41 is installed at the end of the hydrogen main pipe 11 , and the fire arrester 42 is installed at the hydrogen branch pipe 12 .

[0038] Because hydrogen is flammable and explosive, a fire can spread rapidly and pose a high risk. Flame arresters 42, located at the ends of hydrogen branch pipes 12, provide a first line of defense for the power and gas system. They act immediately upon a fire, preventing it from spreading within hydrogen pipeline 1.

[0039] When the flame arrester 42 fails, the flame damper 41 can serve as the second line of defense for the electric energy and gas system. The flame damper 41 has the characteristic of rapid response and can close the valve in a very short time, thereby forming an effective barrier in the hydrogen pipeline 1, preventing the flame from passing through the flame damper 41 and preventing the fire from further spreading.

[0040] This dual protection mechanism greatly improves the safety of the hydrogen pipeline 1. When a fire occurs, the electric and gas systems can quickly isolate the fault area, avoid the expansion of the fault, and minimize the losses caused by the accident.

[0041] The regulating assembly includes a throttle valve 54, a low pressure sensor 55 and a high pressure sensor 57 in sequence along the flow direction of the hydrogen;

[0042] The PLC control system is electrically connected to the throttle valve 54, the low-pressure sensor 55, and the high-pressure sensor 57, respectively. The throttle valve 54 is used to regulate the overall pressure of the hydrogen main pipe 11. The low-pressure sensor 55 is used to detect whether the pressure of the hydrogen main pipe 11 is lower than a set value. The high-pressure sensor 57 is used to detect whether the pressure of the hydrogen main pipe 11 is higher than a set value.

[0043] After hydrogen is generated by the hydrogen generator 6, it is transported through the hydrogen main pipe 11, passing through the throttle valve 54, the low-pressure sensor 55, and the high-pressure sensor 57 in sequence. The throttle valve 54 regulates the overall pressure of the hydrogen, ensuring that it flows within an appropriate pressure range. The low-pressure sensor 55 detects whether the pressure is below a set value, and the high-pressure sensor 57 monitors in real time whether the pressure in the hydrogen main pipe 11 is above a set value, providing timely feedback for the safe operation of the system.

[0044] When the low-pressure sensor 55 detects that the hydrogen pressure is below the set value, the PLC control system can take appropriate measures, such as increasing the hydrogen supply or checking the pipeline for leaks, to ensure that the hydrogen pressure returns to the normal range. Similarly, when the high-pressure sensor 57 detects that the hydrogen pressure is above the set value, the PLC control system can promptly reduce the hydrogen pressure through devices such as the pressure relief valve 56 to prevent dangers such as explosions caused by excessive pressure.

[0045] A ball valve 51 , a pressure sensor 52 and a filter 53 are sequentially arranged between the hydrogen generator 6 and the throttle valve 54 . The ball valve 51 is used to manually open or close the hydrogen pipeline 1 ; the filter 53 is used to filter impurities in the hydrogen pipeline 1 .

[0046] Ball valve 51 offers the advantages of simple operation and high reliability. During the initial system installation phase, ball valve 51 can be manually closed to connect and test the hydrogen pipeline 1, preventing accidental hydrogen leaks. In emergency situations, such as when the power and gas system malfunctions or requires urgent maintenance, operators can quickly manually close ball valve 51 to cut off the hydrogen supply and prevent further escalation of the incident.

[0047] The pressure sensor 52 can monitor the pressure changes at the head end of the hydrogen pipeline 1 in real time to ensure the safe operation of the system.

[0048] The filter 53 is used to filter impurities in the hydrogen pipeline 1, and can effectively remove solid particles, moisture, oil and other impurities in the hydrogen, ensure the purity of the hydrogen, improve the performance and reliability of the hydrogen-blending burner 3, and reduce the performance degradation and shortened life of the hydrogen-blending burner 3 due to impurity accumulation.

[0049] An electromagnetic shut-off valve 58 is provided between the high-pressure sensor 57 and the flame arrester 41 , and the electromagnetic shut-off valve 58 is electrically connected to the PLC control system.

[0050] The electromagnetic shut-off valve 58 has the ability to respond quickly. When an abnormal situation occurs in the electric energy and gas system, such as the high-pressure sensor 57 detects that the pressure of the hydrogen main pipe 11 is too high, the PLC control system can quickly send a signal to make the electromagnetic shut-off valve 58 immediately operate to cut off the flow path of hydrogen, providing a strong guarantee for the safety of the system.

[0051] The electromagnetic shut-off valve 58 and the flame arrester 41 work together to further enhance system safety. In the event of a fire or explosion, the electromagnetic shut-off valve 58 first cuts off the hydrogen supply, preventing the fire from spreading. Simultaneously, the flame arrester 41 prevents flames from propagating back into the hydrogen pipeline 1, jointly ensuring system safety.

[0052] A regulating valve 59 is provided between the flame arrester 42 and the input end of the hydrogen branch pipe 12 . The regulating valve 59 is electrically connected to the PLC control system and is used to adjust the pressure value in the hydrogen pipeline 1 to a set value.

[0053] When the system changes the hydrogen supply pressure according to load demand, the regulating valve 59 can synchronously adjust the pressure of multiple branches so that each device connected to the branch can obtain the appropriate hydrogen pressure, thereby ensuring the efficient operation of the entire system.

[0054] The natural gas pipeline 2 includes a natural gas main pipe 21 and natural gas branch pipes 22 . The output end of the natural gas main pipe 21 is connected to the input ends of multiple natural gas branch pipes 22 , and the output ends of the natural gas branch pipes 22 are connected to the input end of the hydrogen-blending burner 3 .

[0055] The design of a natural gas main 21 connected to multiple natural gas branch pipes 22 can efficiently distribute natural gas from the supply source to each hydrogen-blending burner 3. This structure ensures that each hydrogen-blending burner 3 can obtain the required natural gas in a timely manner to meet the combustion needs of different locations in the system.

[0056] The natural gas main pipe 21 acts as a pressure buffer and stabilizer. By properly designing its diameter and length, the natural gas maintains a relatively stable pressure within the main pipe before being distributed to the various branch pipes. This reduces the impact of pressure fluctuations on burner performance, ensuring a stable and efficient combustion process.

[0057] A pressure relief air defense valve 56 is provided between the low pressure sensor 55 and the high pressure sensor 57 . The pressure relief air defense valve 56 is electrically connected to the PLC control system and is used for the gas in the hydrogen main pipe 11 .

[0058] The pressure relief air defense valve 56 can quickly evacuate the gas in the hydrogen main pipe 11 when the system is over-pressured, preventing the pressure from continuing to rise and causing danger. The rapid response capability of this device is crucial to the safety of the system.

[0059] From a system layout perspective, it's reasonable to place the pressure relief air defense valve 56 between the low-pressure sensor 55 and the high-pressure sensor 57. However, placing the pressure relief air defense valve 56 before the low-pressure sensor 55 could lead to malfunction. For example, if the system is within normal pressure fluctuations but a temporary local pressure drop is detected by the low-pressure sensor 55, then if the pressure relief air defense valve 56 is placed before the low-pressure sensor 55 and lacks proper logic control, it could erroneously activate, causing unnecessary hydrogen discharge and impacting normal system operation.

[0060] On the contrary, if the pressure relief air defense valve 56 is set after the high-pressure sensor 57, when the high-pressure sensor 57 detects an overpressure situation, the pipeline section between the pressure relief air defense valve 56 and the high-pressure source is still in a high-pressure dangerous state, and the pressure relief operation cannot be performed on the entire dangerous area in a timely and effective manner, and the system safety cannot be quickly guaranteed.

[0061] A spray tower is characterized by using the electric energy and gas system with high safety performance.

[0062] Because hydrogen generator 6 uses electricity to decompose water to produce hydrogen, the supply of hydrogen is closely tied to the supply of electricity. In practice, electricity availability may fluctuate depending on factors such as season, time of day, and demand. When electricity is tight, hydrogen production may be affected. By adjusting the hydrogen supply based on electricity availability and increasing the natural gas supply, the electric-to-gas system ensures a stable supply of gas under varying electricity supply conditions, thereby ensuring temperature control in the spray tower and ensuring product quality.

[0063] In addition, by regulating the pressure of the hydrogen pipeline 1, the proportion of hydrogen in the mixed gas can be accurately controlled to achieve optimal combustion efficiency and spray effect.

[0064] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. An electric energy and gas system with high safety performance, characterized in that: Including hydrogen pipelines, natural gas pipelines, hydrogen-blending burners, flame arrester components, PLC control systems and pipeline pressure regulating components; The output end of the natural gas pipeline is connected to the input end of the hydrogen-blending burner, and the hydrogen pipeline includes a hydrogen main pipe and a hydrogen branch pipe. The input end of the hydrogen main pipe is connected to the hydrogen generating device, and the output end of the hydrogen main pipe is respectively connected to the input ends of the plurality of hydrogen branch pipes. The output end of the hydrogen branch pipe is connected to the input end of the hydrogen-blending burner, and the plurality of hydrogen branch pipes correspond to the plurality of hydrogen-blending burners one by one. The pipeline pressure regulating assembly is installed on the hydrogen main pipe, the hydrogen main pipe and the hydrogen branch pipe are both installed with the fire-blocking assembly, and the PLC control system is electrically connected to the fire-blocking assembly and the pipeline pressure regulating assembly respectively.

2. The electric energy and gas system with high safety performance according to claim 1 is characterized in that: The fire arrester assembly includes a fire arrester and a fire arrester. The fire arrester is installed at the end of the hydrogen main pipe, and the fire arrester is installed at the hydrogen branch pipe.

3. The electric energy and gas system with high safety performance according to claim 2, characterized in that: The pipeline pressure regulating assembly includes a throttle valve, a low pressure sensor and a high pressure sensor in sequence along the flow direction of the hydrogen; The PLC control system is electrically connected to the throttle valve, the low-pressure sensor, and the high-pressure sensor, respectively. The throttle valve is used to regulate the overall pressure of the hydrogen main pipe. The low-pressure sensor is used to detect whether the pressure of the hydrogen main pipe is lower than a set value. The high-pressure sensor is used to detect whether the pressure of the hydrogen main pipe is higher than a set value.

4. The electric energy and gas system with high safety performance according to claim 3 is characterized in that: A ball valve, a pressure sensor and a filter are sequentially arranged between the hydrogen generator and the throttle valve. The ball valve is used to manually open or close the hydrogen pipeline; the filter is used to filter impurities in the hydrogen pipeline.

5. The electric energy and gas system with high safety performance according to claim 3 is characterized in that: An electromagnetic shut-off valve is provided between the high-pressure sensor and the flame arrester, and the electromagnetic shut-off valve is electrically connected to the PLC control system.

6. The electric energy and gas system with high safety performance according to claim 2, characterized in that: A regulating valve is provided between the flame arrester and the input end of the hydrogen branch pipe. The regulating valve is electrically connected to the PLC control system and is used to adjust the pressure value in the hydrogen pipeline to a set value.

7. The electric energy and gas system with high safety performance according to claim 1, characterized in that: The natural gas pipeline includes a natural gas main pipe and a natural gas branch pipe. The output end of the natural gas main pipe is respectively connected to the input ends of a plurality of natural gas branch pipes, and the output ends of the natural gas branch pipes are connected to the input end of the hydrogen-blending burner.

8. The electric energy and gas system with high safety performance according to claim 3, characterized in that: A pressure relief air defense valve is provided between the low-pressure sensor and the high-pressure sensor. The pressure relief air defense valve is electrically connected to the PLC control system and is used to release the gas in the hydrogen main pipe in a timely manner.

9. A spray tower, characterized in that An electric energy and gas system with high safety performance as described in any one of claims 1 to 8 is used.

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