Hydrogen leakage comprehensive treatment system based on special composite pipe

Abstract

The application discloses a hydrogen leakage comprehensive treatment system based on a special composite pipeline, which comprises a hydrogen conveying device, a combustion inhibitor conveying device and a combustion inhibitor releasing device. The hydrogen conveying device comprises multiple sections of composite pipelines which are connected with each other and are internally provided with explosion suppression channels which are surrounded outside hydrogen conveying channels, the explosion suppression channels are filled with inert gas, and a hydrogen leakage detector is arranged to detect. The combustion inhibitor conveying device comprises T-shaped three-way ball valves and combustion inhibitor conveying pipes which are connected with each other, and the T-shaped three-way ball valves are used to control the combustion inhibitor to flow into the explosion suppression channels in the hydrogen leakage area. The combustion inhibitor releasing device is used to send the gas-solid mixed combustion inhibitor to the combustion inhibitor conveying device. The application can greatly improve the hydrogen transportation safety, can implement the combustion inhibition measure on the leaked hydrogen in the pipeline, is different from the traditional scheme of starting the combustion inhibition after the hydrogen combustion, improves the safety of the whole mechanism, and reduces the danger of the maintenance personnel work.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen leakage treatment, and in particular to a comprehensive hydrogen leakage treatment system based on a special composite pipeline. Background Art

[0002] Given the scarcity of fossil energy and environmental pollution, countries around the world are actively exploring the development of renewable energy. Hydrogen, with its high energy density and pollution-free products, has attracted attention in the global energy market. Its abundant supply, environmentally friendly, low-carbon nature, and high efficiency have made it a mainstream renewable energy option. However, issues such as hydrogen transportation safety remain a major obstacle to its large-scale utilization. In particular, effectively suppressing hydrogen leaks and effectively preventing explosions caused by hydrogen leaks remain a key research focus and challenge.

[0003] Hydrogen is primarily transported via pipelines, tube trailers, and tank trucks. Pipeline transport is the most economical method, boasting a storage and transportation efficiency of up to 95% and low maintenance costs. However, hydrogen pipelines currently used in hydrogen refueling stations primarily operate at high pressure, requiring the pipelines to withstand significant transport pressure. After years of use, hydrogen embrittlement can cause the pipeline's inherent protection against hydrogen to gradually become ineffective. On the one hand, hydrogen leaks into the atmosphere and is highly susceptible to explosions when exposed to heat sources. On the other hand, the premixing of hydrogen and air within the pipeline can also easily trigger detonations. Therefore, no effective flame and explosion suppression solutions for leaks in high-pressure hydrogen pipelines have yet been proposed.

[0004] Specifically, the current market pain points are as follows:

[0005] 1. High-pressure hydrogen pipelines are generally designed with fire sprinkler systems to prevent the spread of fire. However, when hydrogen leaks, they are unable to effectively contain the premixed explosion flame.

[0006] 2. Since the time from hydrogen leakage to premixed explosion is extremely short (milliseconds), traditional passive suppression devices are difficult to take effect in a very short time and cannot respond to possible flame explosions in a timely manner.

[0007] 3. Traditional explosion suppressants are single-phase designs and cannot quickly and efficiently prevent flame propagation during the flame propagation suppression process. Summary of the Invention

[0008] The purpose of the present invention is to provide a comprehensive hydrogen leakage treatment system based on a special composite pipeline to solve the problem that the existing technology is difficult to achieve rapid response explosion suppression.

[0009] In order to solve the above technical problems, the present invention provides a comprehensive hydrogen leakage treatment system based on a special composite pipeline, including a hydrogen delivery device, a flame suppressant delivery device and a flame suppressant release device; the hydrogen delivery device includes multiple sections of composite pipelines connected to each other; a hydrogen delivery channel and an explosion suppression channel are provided inside the composite pipeline, the explosion suppression channel is surrounded by the hydrogen delivery channel, and the explosion suppression channel is used to be filled with inert gas; a hydrogen leak detector and a flame suppressant input port are provided outside the composite pipeline, and the monitoring area of ​​the hydrogen leak detector is set inside the explosion suppression channel , the flame retardant input port is connected to the explosion suppression channel; the flame retardant delivery device includes a T-type three-way ball valve and a flame retardant delivery pipe, multiple T-type three-way ball valves are respectively connected to multiple flame retardant input ports, and the flame retardant delivery pipes are connected between adjacent T-type three-way ball valves, and the T-type three-way ball valve is used to control the flame retardant to flow into the explosion suppression channel in the area where hydrogen leakage occurs; the output end of the flame retardant release device is connected to the T-type three-way ball valve arranged at the starting position, and the flame retardant release device is used to deliver the gas-solid mixed flame retardant to the flame retardant delivery device.

[0010] In one embodiment, a plurality of flame arresters are provided in the explosion suppression channel, and the plurality of flame arresters divide the explosion suppression channel into a plurality of fire arresting areas.

[0011] In one embodiment, the monitoring areas of the multiple hydrogen leak detectors are respectively arranged in the multiple fire-resistance areas.

[0012] In one embodiment, the T-type three-way ball valve includes a valve body, a spherical body and a rotary motor; the valve body is provided with a delivery port and a cannula connected to its interior; both of the delivery ports are connected to the flame retardant delivery pipe; the cannula is connected to the flame retardant input port; the spherical body is arranged in the valve body, and a T-shaped channel is provided in the spherical body; the rotary motor is used to drive the spherical body to rotate so that the T-shaped channel connects the two delivery ports with the cannula, or only connects one of the delivery ports with the cannula.

[0013] In one embodiment, two oppositely arranged flame retardant spray ports are provided on the side wall of the end portion of the insert tube, and the directions of the flame retardant spray ports are consistent with the axial direction of the hydrogen delivery channel.

[0014] In one embodiment, the intubation tube and the flame retardant inlet are connected in a plug-in manner; the flame retardant inlet is provided with a tension adjustment mechanism, which is wrapped around the intubation tube and is used to adjust the clamping force of the intubation tube.

[0015] In one embodiment, a receiving cavity having a radial dimension greater than the outer diameter of the cannula is provided inside the flame retardant inlet, and the radial dimensions of both ends of the receiving cavity are reduced in the direction toward the two ends of the flame retardant inlet; the tension adjustment mechanism includes a conical air seal pad and a baffle provided in the receiving cavity; the two conical air seal pads are both sleeved on the outside of the cannula, and the two conical air seal pads are respectively placed in the two ends of the receiving cavity; the two baffles are both sleeved on the outside of the cannula, and the two baffles are placed between the two conical air seal pads; the tension adjustment mechanism is used to fill gas into the receiving cavity, so as to use the baffle to push the conical air seal pad toward the end of the receiving cavity and clamp the cannula.

[0016] In one embodiment, the tension adjustment mechanism also includes an inflation port and an air nozzle with a one-way valve function; the inflation port is connected to the side of the flame retardant input port, and the inflation port is connected to the receiving chamber; the air nozzle is connected to the inflation port, and the air nozzle and the inflation port are threadedly connected, and an exhaust hole is provided on the outer wall of the air nozzle for threaded connection.

[0017] In one embodiment, the flame retardant releasing device includes an inert gas input pipe and a flame retardant storage chamber; the inert gas input pipe is connected to the interior of the flame retardant storage chamber.

[0018] In one embodiment, the flame retardant release device further includes a release amount regulating valve and a check valve; the input end of the release amount regulating valve is connected to the output end of the flame retardant storage chamber, and the output end of the release amount regulating valve is connected to the input end of the check valve; the output end of the check valve is connected to the T-type three-way ball valve arranged in the starting position.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. Based on the design of the composite pipe's double-layer structure, the present invention prevents hydrogen leaking from the hydrogen transport channel wall from coming into contact with the external environment. The gas pressure in the explosion suppression channel is consistent with the gas pressure in the hydrogen transport channel, effectively preventing further hydrogen leakage.

[0021] 2. Based on the design of the composite pipeline, the present invention can isolate the contact between the outer wall of the composite pipeline and hydrogen, as well as the contact between the hydrogen leak detector and hydrogen, avoiding hydrogen leakage accidents caused by hydrogen embrittlement, thereby ensuring the long-term safe and stable operation of the pipeline system.

[0022] 3. Based on the segmented modular splicing design of the hydrogen delivery device using multiple sections of composite pipes, the present invention can be quickly replaced after a leak, with convenient operation and low cost, greatly shortening maintenance time and improving the maintainability of the system.

[0023] 4. Based on the tension adjustment mechanism, the invention can realize the rapid installation with the flame retardant delivery device. The invention can conveniently and quickly realize the assembly and separation of the T-type three-way ball valve and the hydrogen delivery device, and can be reused, thereby improving the replacement efficiency of scrapped pipelines.

[0024] 5. Based on the reasonable arrangement of multiple hydrogen leak detectors, the present invention can monitor the pipeline status in real time. The multiple hydrogen leak detectors can sense trace hydrogen leaks and accurately locate the leak points, ensuring a rapid response when any minor leak occurs.

[0025] 6. Based on the combined flame retardant design of the flame arrester and the inert gas, the present invention can quickly achieve the flame suppression effect in the first place.

[0026] 7. Based on the special design of the flame suppressant nozzle, the present invention can promote the gas flow in the explosion suppression channel, thereby reducing the deposition of the flame suppressant inside the explosion suppression channel.

[0027] 8. The integrated treatment system based on composite pipelines can greatly improve the safety of hydrogen transportation and implement flame suppression measures for leaked hydrogen in the pipeline. This is different from the traditional solution of suppressing flames after hydrogen combustion occurs. It improves the safety of the overall organization and reduces the danger of maintenance personnel's work. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a structural diagram provided by an embodiment of the present invention;

[0030] Figure 2 yes Figure 1 A schematic cross-sectional structural diagram of a hydrogen delivery device;

[0031] Figure 3 yes Figure 1 Schematic diagram of the T-type three-way ball valve structure;

[0032] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure;

[0033] Figure 5 yes Figure 1 Schematic diagram of the tension adjustment mechanism structure;

[0034] Figure 6 yes Figure 5 Schematic diagram of the disassembled structure;

[0035] Figure 7 yes Figure 5 A partial enlarged structural diagram of part A;

[0036] Figure 8 yes Figure 5 A schematic diagram of the partially enlarged structure of part B;

[0037] Figure 9 yes Figure 1 Schematic diagram of the structure of the flame suppressant release device;

[0038] Figure 10 yes Figure 9 Schematic diagram of the cross-sectional structure.

[0039] The reference numerals are as follows:

[0040] 10. Hydrogen delivery device; 11. Composite pipeline; 111. Hydrogen delivery channel; 112. Explosion suppression channel; 113. Hydrogen leak detector; 114. Flame suppressant inlet; 115. Flame arrester; 116. Fire arresting area; 117. Accommodation cavity; 12. Tension adjustment mechanism; 121. Conical gas seal; 122. Cover; 123. Inflating port; 124. Gas nozzle; 125. Exhaust hole;

[0041] 20. Flame suppressant delivery device; 21. T-type three-way ball valve; 211. Valve body; 212. Spherical body; 213. Rotary motor; 214. Delivery port; 215. Intubation tube; 216. T-shaped channel; 217. Flame suppressant discharge port; 22. Flame suppressant delivery pipe;

[0042] 30. Flame suppressant release device; 31. Inert gas inlet pipe; 32. Flame suppressant storage chamber; 33. Release quantity regulating valve; 331. Flame suppressant flow channel; 332. Drive motor; 333. Screw rod; 334. Nut; 335. Connecting rod; 336. Movable valve body; 34. Check valve. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0044] The present invention provides a comprehensive hydrogen leakage treatment system based on a special composite pipe 11, which is implemented as follows: Figure 1 As shown, it includes a hydrogen delivery device 10, a flame suppressant delivery device 20 and a flame suppressant release device 30.

[0045] The hydrogen delivery device 10 is used to deliver hydrogen and is also the first line of defense for hydrogen leak detection and explosion suppression. Therefore, in order to ensure that the hydrogen delivery device 10 can better balance the two functions, the hydrogen delivery device 10 of this embodiment adopts Figure 1 and Figure 2 The structure shown.

[0046] At this time, the hydrogen delivery device 10 includes multiple sections of interconnected composite pipes 11. Although the composite pipes 11 are all straight pipes in the figure, in actual application, the composite pipes 11 can also be curved pipes of various shapes, as long as it is ensured that the multiple composite pipes 11 can be connected to each other to transport hydrogen to the destination.

[0047] Specifically, since the composite pipeline 11 needs to have both the functions of hydrogen transmission and hydrogen leakage detection and explosion suppression, this embodiment provides a hydrogen transmission channel 111 and an explosion suppression channel 112 inside the composite pipeline 11, so as to utilize the hydrogen transmission channel 111 for hydrogen transmission and utilize the explosion suppression channel 112 for hydrogen leakage detection and explosion suppression.

[0048] Among them, since the explosion suppression channel 112 is surrounded by the hydrogen delivery channel 111 at this time, and the explosion suppression channel 112 is used to fill inert gas, once there is a hydrogen leakage, the leaked hydrogen will first enter the explosion suppression channel 112, and under the suppression of the inert gas, the diffusion and explosion of hydrogen will be curbed, thereby realizing the explosion suppression function of the first line of defense.

[0049] In addition, in order to achieve timely detection of hydrogen leakage and further explosion suppression function, this embodiment is provided with a hydrogen leakage detector 113 and a flame suppressant input port 114 outside the composite pipe 11.

[0050] By setting the monitoring area where the hydrogen leak detector 113 is installed in the explosion suppression channel 112, when hydrogen leaks into the explosion suppression channel 112, the hydrogen leak detector 113 can detect the presence of hydrogen leakage in the pipe section in the first time, ensuring that the hydrogen leakage comprehensive treatment system and staff can respond in time.

[0051] By connecting the flame retardant inlet 114 with the explosion suppression channel 112, it is convenient to send the relevant flame retardant into the explosion suppression channel 112 through the flame retardant inlet 114 after hydrogen leakage is found in the pipe section, thereby realizing the explosion suppression function of the second line of defense, so as to better achieve the explosion suppression effect on hydrogen.

[0052] Furthermore, this embodiment also provides a plurality of flame arresters 115 in the explosion suppression channel 112, and the plurality of flame arresters 115 are all annularly sleeved outside the hydrogen delivery channel 111, so that the plurality of flame arresters 115 can separate the explosion suppression channel 112 into a plurality of fire arresting areas 116. At this time, even if there is a hydrogen leakage and explosion in a certain fire arresting area 116, the flame arrester 115 can prevent this situation from spreading to other areas, thereby realizing the explosion suppression function of the third line of defense.

[0053] In order to ensure that hydrogen leakage can be detected in each fire barrier area 116 in a timely manner, this embodiment also sets the monitoring areas of multiple hydrogen leakage detectors 113 in multiple fire barrier areas 116 respectively to ensure that once there is a hydrogen leakage in each fire barrier area 116, there is a corresponding hydrogen leakage detector 113 to perform timely detection.

[0054] As can be seen from the above, this embodiment sets three lines of defense to achieve hydrogen explosion suppression, among which whether the second line of defense can accurately and timely deliver the flame suppressant into the explosion suppression channel 112 will play a vital role. Therefore, in order to achieve this goal, this embodiment will use the flame suppressant delivery device 20 and the flame suppressant release device 30 to cooperate with each other to ensure the accurate and timely delivery of the flame suppressant.

[0055] Specifically, the flame suppressant delivery device 20 is used to accurately deliver the flame suppressant released by the flame suppressant release device 30 to the area where hydrogen leakage occurs. Therefore, in order to achieve this purpose, this embodiment adopts Figures 1 to 8 In the structure shown, the flame retardant delivery device 20 at this time includes a T-type three-way ball valve 21 and a flame retardant delivery pipe 22. Multiple T-type three-way ball valves 21 are respectively connected to multiple flame retardant input ports 114, and flame retardant delivery pipes 22 are connected between adjacent T-type three-way ball valves 21. Therefore, when the flame retardant is transported inside the flame retardant delivery device 20, by switching the working state of the T-type three-way ball valve 21, the T-type three-way ball valve 21 can be used to control the flame retardant to flow into the explosion suppression channel 112 in the hydrogen leakage area, thereby realizing the flame suppression and explosion prevention function.

[0056] The T-shaped three-way ball valve 21 of this embodiment includes a valve body 211, a spherical body 212, and a revolving motor 213. The valve body 211 is provided with a delivery port 214 and a cannula 215 connected to its interior. Both delivery ports 214 are connected to the flame suppressant delivery pipe 22, and the cannula 215 is connected to the flame suppressant inlet 114. The spherical body 212 is disposed within the valve body 211 and has a T-shaped channel 216 defined therein. The revolving motor 213 is used to drive the spherical body 212 to rotate, so that the T-shaped channel 216 connects both delivery ports 214 to the cannula 215, or connects only one delivery port 214 to the cannula 215.

[0057] For example, when it is necessary to transport the flame retardant to each explosion suppression channel 112, each spherical body 212 can be controlled to rotate by each rotary motor 213 until the T-shaped channel 216 in each spherical body 212 is in an upright state. The flame retardant can then flow through each flame retardant delivery pipe 22 and each T-shaped three-way ball valve 21 and be input into each explosion suppression channel 112.

[0058] When it is necessary to control the flame retardant to be delivered only to a specific position, it can be achieved by changing the working state of the T-type three-way ball valve 21; for example, if it is only desired to deliver the flame retardant to the explosion suppression channel 112 on the left, the working state of the T-type three-way ball valve 21 on the left can be changed, that is, the spherical body 212 can be controlled to rotate through its rotary motor 213, so that the T-shaped channel 216 changes from the upright state to a state rotated 90° clockwise, and the flame retardant can only flow into the explosion suppression channel 112 on the left, and cannot be delivered to the T-type three-way ball valve 21 on the right.

[0059] In addition, in order to achieve the diversion of the flame retardant and reduce the settlement of the flame retardant on the inner wall of the pipe, Figure 2 and Figure 4 As shown, in this embodiment, two flame suppressant nozzles 217 are arranged oppositely on the side wall of the end of the insert tube 215. The direction of the flame suppressant nozzle 217 is consistent with the axial direction of the hydrogen delivery channel 111. For example, in the direction shown in the figure, the two flame suppressant nozzles 217 are respectively provided on the left and right side walls of the insert tube 215. The flame suppressant nozzle 217 on the left is arranged horizontally to the left, and the flame suppressant nozzle 217 on the right is arranged horizontally to the right, so that the flame suppressant can quickly diffuse in the left and right directions, and the timeliness of hydrogen explosion suppression is also improved.

[0060] Furthermore, in order to improve the installation convenience between the flame suppressant delivery device 20 and the hydrogen delivery device 10, as Figure 1 and Figure 5 As shown, this embodiment provides a plug-in connection between the cannula 215 and the flame retardant inlet 114, and a tension adjustment mechanism 12 is provided at the flame retardant inlet 114, so that the tension adjustment mechanism 12 is wrapped around the cannula 215, so that the tension adjustment mechanism 12 can be used to adjust the clamping force of the cannula 215; therefore, when the tension adjustment mechanism 12 does not clamp the cannula 215, the cannula 215 can be quickly plugged in and out of the flame retardant inlet 114, meeting the convenient installation requirements between the high flame retardant delivery device 20 and the hydrogen delivery device 10. After the cannula 215 and the flame retardant inlet 114 are inserted into place, it is only necessary to clamp the cannula 215 using the tension adjustment mechanism 12 to ensure the installation firmness between the flame retardant delivery device 20 and the hydrogen delivery device 10.

[0061] Specifically, in order to achieve assembly with the tension adjustment mechanism 12, this embodiment provides a receiving cavity 117 inside the flame suppressant inlet 114, the radial dimension of which is larger than the outer diameter of the inserting tube 215, and in the direction toward the two ends of the flame suppressant inlet 114, the radial dimensions of both ends of the receiving cavity 117 are reduced, so that the upper part of the receiving cavity 117 is in an upright frustum state, the middle part is in a cylindrical state, and the lower part is in an inverted frustum state.

[0062] The tension adjustment mechanism 12 of this embodiment adopts the following Figures 5 to 7 In the specific structure shown, the tension adjustment mechanism 12 at this time includes a conical air seal pad 121 and a blocking cover 122 arranged in the receiving cavity 117; the conical air seal pad 121 is two, and the two conical air seal pads 121 are both sleeved outside the cannula 215, one conical air seal pad 121 is arranged in the upper end of the receiving cavity 117 in a state of a frustum being upright, and the other conical air seal pad 121 is arranged in the lower end of the receiving cavity 117 in a state of a frustum being inverted, so that the two conical air seal pads 121 can be placed at both ends of the receiving cavity 117 respectively. inside; and there are two blocking covers 122, both of which are sleeved on the outside of the cannula 215, and the two blocking covers 122 are placed between the two conical air sealing cushions 121, so that one blocking cover 122 can abut against the upper conical air sealing cushion 121, and the other blocking cover 122 can abut against the lower conical air sealing cushion 121; and the tension adjustment mechanism 12 is used to fill gas into the receiving chamber 117, so as to use the blocking cover 122 to push the conical air sealing cushion 121 to the end of the receiving chamber 117 and clamp the cannula 215.

[0063] For example, when the accommodating chamber 117 is not filled with gas, the conical air seal pad 121 and the baffle 122 are actually in a state where they can move freely up and down, so the cannula 215 is not subjected to a strong clamping force, and the plugging and unplugging operation can be easily completed; if it is necessary to clamp the cannula 215, high-pressure inert gas can be filled into the accommodating chamber 117, and the high-pressure inert gas will push the upper conical air seal pad 121 and the baffle 122 to move upward, and push the lower conical air seal pad 121 and the baffle 122 to move downward; and as the air pressure increases, the extrusion between the conical air seal pad 121 and the end of the accommodating chamber 117 will increase, and the conical air seal pad 121 will be deformed and exert a strong extrusion force on the cannula 215, thereby realizing the clamping of the cannula 215 by the tension adjustment mechanism 12.

[0064] Obviously, since the input of high-pressure inert gas can achieve the clamping of the cannula 215, if it is desired to release the clamping of the cannula 215, it is only necessary to exhaust the high-pressure inert gas. Therefore, in order to achieve this effect, this embodiment adopts Figure 5 、 Figure 6 and Figure 8 In the structure shown, the tension adjustment mechanism 12 at this time also includes an inflation port 123 and an air nozzle 124 with a one-way valve function; the inflation port 123 is connected to the side of the flame retardant input port 114, and the inflation port 123 is also connected to the accommodating chamber 117; and the air nozzle 124 is connected to the inflation port 123, and the air nozzle 124 and the inflation port 123 are threadedly connected, and an exhaust hole 125 is provided on the outer wall of the air nozzle 124 for threaded connection.

[0065] Therefore, when the air nozzle 124 and the inflation port 123 are connected to a certain position, the exhaust hole 125 will be completely blocked by the inflation port 123. At this time, the air nozzle 124 can be used to fill the interior of the receiving chamber 117 with high-pressure inert gas to complete the clamping of the cannula 215. If the clamping of the cannula 215 needs to be released, it is only necessary to loosen the air nozzle 124 until the exhaust hole 125 is exposed. The high-pressure inert gas in the receiving chamber 117 will automatically be discharged through the exhaust hole 125, thereby releasing the clamping of the cannula 215.

[0066] As for the flame suppressant releasing device 30, it is mainly used to store and release the flame suppressant. In order to achieve this function, this embodiment adopts the following method: Figure 1 、 Figure 9 and Figure 10 In the structure shown, the output end of the flame suppressant releasing device 30 is connected to the T-type three-way ball valve 21 arranged at the starting position, so that the flame suppressant releasing device 30 can be used to deliver the gas-solid mixed flame suppressant to the flame suppressant conveying device 20.

[0067] Specifically, in order to achieve the release of gas-solid mixed flame retardant, it is necessary to perform a gas-solid mixing operation of the flame retardant, so Figure 1 and Figure 9 As shown, this embodiment provides a flame suppressant release device 30 including an inert gas input pipe 31 and a flame suppressant storage chamber 32. The inert gas input pipe 31 is connected to the interior of the flame suppressant storage chamber 32. Therefore, when the flame suppressant is stored in the flame suppressant storage chamber 32, it is only necessary to use the inert gas input pipe 31 to input an inert gas such as carbon dioxide to perform a gas-solid mixing operation of the flame suppressant.

[0068] In order to achieve the regulation of the release amount of the flame retardant, this embodiment also adopts Figure 1 and Figure 9 In the structure shown, the flame suppressant releasing device 30 at this time also includes a release amount regulating valve 33 and a check valve 34; the input end of the release amount regulating valve 33 is connected to the output end of the flame suppressant storage chamber 32, and the output end of the release amount regulating valve 33 is connected to the input end of the check valve 34, so when the flame suppressant is to be released, it is only necessary to adjust the opening of the release amount regulating valve 33 to achieve the control of the flame suppressant release amount; and the output end of the check valve 34 is connected to the T-type three-way ball valve 21 arranged at the starting position, so when the flame suppressant is output through the check valve 34, no backflow will occur, thereby ensuring that the flame suppressant can be better delivered to the desired location.

[0069] Among them, such as Figure 9 and Figure 10As shown, the release amount regulating valve 33 of this embodiment is provided with a flame suppressant flow channel 331 inside, the input end of the flame suppressant flow channel 331 is connected to the output end of the flame suppressant storage chamber 32, and the output end of the flame suppressant flow channel 331 is connected to the input end of the check valve 34; and the release amount regulating valve 33 is also provided with a driving motor 332, a screw rod 333, a nut 334, a connecting rod 335 and a movable valve body 336. The driving motor 332 is used to drive the screw rod 333 to rotate, and the nut 334 is threadedly sleeved on the outside of the screw rod 333. One end of the connecting rod 335 is connected to the nut 334, and the other end of the connecting rod 335 passes through the guide hole inside the release amount regulating valve 33 and is connected to the movable valve body 336.

[0070] Therefore, when the driving motor 332 controls the screw rod 333 to rotate, the synchronous linear movement control of the nut 334, the connecting rod 335 and the movable valve body 336 can be realized; and since the movement trajectory of the movable valve body 336 is perpendicular to the axial direction of the flame suppressant flow channel 331, so that the movable valve body 336 can move in and out of the flame suppressant flow channel 331, when the movable valve body 336 moves toward the interior of the flame suppressant flow channel 331, the obstruction of the movable valve body 336 on the flame suppressant flow channel 331 will increase, thereby realizing the regulation of reducing the release amount of the flame suppressant; similarly, when the movable valve body 336 moves toward the outside of the flame suppressant flow channel 331, the obstruction of the movable valve body 336 on the flame suppressant flow channel 331 will be reduced, thereby realizing the regulation of increasing the release amount of the flame suppressant.

[0071] To summarize, the workflow of the entire system can be divided into five main stages:

[0072] 1. Detection stage

[0073] The hydrogen leak detector 113 monitors in real time the concentration and pressure of hydrogen inside the explosion suppression channel 112. Once a hydrogen leak is detected, the hydrogen leak detector 113 immediately sends a signal to the central control system.

[0074] 2. Response Phase

[0075] After the rapid response system receives the signal from the hydrogen leak detector 113, the flame suppressant release device 30 starts to release a mixture of carbon dioxide and flame suppressant. At the same time, the flame suppressant delivery device 20 starts to deliver the flame suppressant to the hydrogen leak location.

[0076] 3. Processing stage

[0077] First, hydrogen leaks into the explosion suppression channel 112, physically blocking contact with the outside world. Simultaneously, due to the narrow space within the explosion suppression channel 112, the flame suppressant can diffuse quickly, rapidly filling the explosion suppression channel 112 and suppressing any combustion reactions that could be triggered by the leaked hydrogen.

[0078] 4. Feedback stage

[0079] The system provides feedback on leaks, enabling operators to shut down hydrogen delivery in a timely manner. Simultaneously, the central control system pinpoints the leak point and provides intuitive feedback to operators.

[0080] 5. Maintenance phase

[0081] After the operators arrived at the scene, they used an air sealing valve to seal the leaking pipe section, and then quickly dismantled and replaced the leaking pipe section to ensure that the entire system returned to normal operation.

[0082] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A comprehensive hydrogen leakage treatment system based on a special composite pipeline, characterized in that: It includes a hydrogen delivery device, a flame retardant delivery device and a flame retardant release device; The hydrogen delivery device includes multiple sections of interconnected composite pipes; a hydrogen delivery channel and an explosion suppression channel are provided inside the composite pipe, the explosion suppression channel surrounds the hydrogen delivery channel, and the explosion suppression channel is used to be filled with inert gas; a hydrogen leak detector and a flame suppressant inlet are provided outside the composite pipe, the monitoring area of ​​the hydrogen leak detector is provided in the explosion suppression channel, and the flame suppressant inlet is connected to the explosion suppression channel; The flame retardant delivery device includes a T-type three-way ball valve and a flame retardant delivery pipe. The plurality of T-type three-way ball valves are respectively connected to the plurality of flame retardant input ports. The flame retardant delivery pipes are connected between adjacent T-type three-way ball valves. The T-type three-way ball valve is used to control the flame retardant to flow into the explosion suppression channel in the area where hydrogen leakage occurs. The flame suppressant release device includes an inert gas input pipe and a flame suppressant storage chamber, the output end of the flame suppressant storage chamber is connected to the T-type three-way ball valve arranged in the starting position, and the flame suppressant release device is used to deliver the gas-solid mixed flame suppressant to the flame suppressant delivery device; The T-type three-way ball valve includes a valve body, a spherical body and a rotary motor; The valve body is provided with a delivery port and a cannula connected to the interior thereof; both the delivery ports are connected to the flame suppressant delivery pipe; the cannula is connected to the flame suppressant input port; The spherical body is arranged in the valve body, and a T-shaped channel is provided in the spherical body; The epicyclic motor is used to drive the spherical body to rotate, so that the T-shaped channel connects the two delivery ports with the cannula, or connects only one delivery port with the cannula; Two flame suppressant spray ports are arranged opposite to each other on the side wall of the end of the insert tube, and the directions of the flame suppressant spray ports are consistent with the axial direction of the hydrogen delivery channel; The intubation tube and the flame retardant inlet are connected in a plug-in manner; The flame retardant inlet is provided with a tightness adjustment mechanism, which is wrapped around the outside of the cannula and is used to adjust the clamping force of the cannula.

2. The comprehensive hydrogen leakage treatment system according to claim 1, characterized in that: A plurality of flame arresters are provided in the explosion suppression channel, and the plurality of flame arresters divide the explosion suppression channel into a plurality of fire arresting areas.

3. The comprehensive hydrogen leakage treatment system according to claim 2, characterized in that: The monitoring areas of the multiple hydrogen leak detectors are respectively arranged in the multiple fire-resistance areas.

4. The comprehensive hydrogen leakage treatment system according to claim 1, characterized in that: The flame retardant inlet is provided with a receiving cavity with a radial dimension larger than the outer diameter of the inserting tube, and the radial dimensions of both ends of the receiving cavity decrease in the direction toward both ends of the flame retardant inlet; The tension adjustment mechanism includes a conical air seal pad and a blocking cover arranged in the receiving cavity; The two conical air sealing pads are both sleeved on the outside of the cannula, and the two conical air sealing pads are respectively placed in the two ends of the receiving cavity; The two blocking covers are both sleeved on the outside of the cannula, and the two blocking covers are placed between the two conical air sealing cushions; The tightness adjustment mechanism is used to fill gas into the receiving cavity, so as to use the blocking cover to push the conical air seal pad toward the end of the receiving cavity and clamp the cannula.

5. The comprehensive hydrogen leakage treatment system according to claim 4, characterized in that: The tension adjustment mechanism also includes an air filling port and an air nozzle with a one-way valve function; The inflation port is connected to the side of the flame retardant inlet, and the inflation port is connected to the receiving chamber; The gas nozzle is connected to the inflation port, and the gas nozzle and the inflation port are threadedly connected. An exhaust hole is provided on the outer wall of the gas nozzle for threaded connection.

6. The comprehensive hydrogen leakage treatment system according to claim 1, characterized in that: The inert gas input pipe is connected to the interior of the flame retardant storage chamber.

7. The comprehensive hydrogen leakage treatment system according to claim 6, characterized in that: The flame suppressant releasing device further comprises a release amount regulating valve and a check valve; The input end of the release amount regulating valve is connected to the output end of the flame suppressant storage chamber, and the output end of the release amount regulating valve is connected to the input end of the check valve; The output end of the check valve is connected to the T-type three-way ball valve arranged at the starting position.

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