Movable multifunctional efficient emergency disposal integrated system for LNG tank car

Abstract

The invention discloses an LNG tank car movable type multifunctional efficient emergency disposal integrated system which comprises a movable chassis unit installed in a tool car and providing an installation platform; the emergency monitoring and analyzing unit is used for monitoring the gas concentration around the accident tank car in real time; the quick transferring and filling unit comprises a quick transferring subunit and a filling subunit; the rapid transfer subunit is used for extracting and filling LNG when the tank car has an accident; the filling subunit is used for filling LNG in the vehicle-mounted LNG storage device into a vehicle participating in emergency disposal according to needs; and the safety protection unit is used for monitoring the pressure in the tank car. Through the integrated and intelligent innovative design, quick response and efficient disposal are achieved, the efficiency and safety of emergency disposal and transfer are greatly improved, personnel and environment risks are effectively reduced, the emergency disposal time is remarkably shortened, and energy losses are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of emergency management, and particularly relates to a mobile multi-functional and high-efficiency emergency disposal integrated system for LNG tank trucks. Background Art

[0002] With the increasingly wide application of liquefied natural gas (LNG) in the energy field, the demand for long-distance transportation of LNG tank trucks has also increased accordingly. LNG tank trucks are one of the key logistics links connecting LNG receiving stations and end-users. They transport LNG from coastal areas or large production facilities to gas filling stations or other consumption points in inland areas through road transportation, thus ensuring the effective distribution of LNG across the country. However, with the growth of the transportation volume of LNG tank trucks, the challenges it faces have become increasingly prominent. During transportation, LNG tank trucks may encounter emergencies such as leakage and collision, posing a major threat to personnel safety, the environment, and energy supply. Most traditional emergency disposal methods rely on manual operation, in-situ unordered discharge, etc., which are time-consuming, inefficient, and have uncontrollable safety, and cannot meet the requirements of rapid response and high-efficiency disposal. At the same time, existing transfer equipment usually has a single function, lacks the characteristics of integration and intelligence, and is difficult to adapt to complex and changeable emergency scenarios. Therefore, there is an urgent need to design a mobile multi-functional and high-efficiency emergency disposal integrated system for LNG tank trucks. Summary of the Invention

[0003] The present invention is proposed to solve the problem in the prior art that most traditional emergency disposal methods rely on manual operation, in-situ unordered discharge, are time-consuming and inefficient, and cannot meet the requirements of rapid response and high-efficiency disposal. Its purpose is to provide a mobile multi-functional and high-efficiency emergency disposal integrated system for LNG tank trucks.

[0004] The present invention is achieved through the following technical solutions:

[0005] A mobile multi-functional and high-efficiency emergency disposal integrated system for LNG tank trucks, comprising:

[0006] A mobile chassis unit, which is installed in a tool vehicle and provides an installation platform for an emergency monitoring and analysis unit, a rapid transfer and filling unit, and a safety protection unit;

[0007] An emergency monitoring and analysis unit, which real-time monitors the gas concentration around the accident tank truck. When it detects a rapid increase in gas leakage or abnormal gas concentration, it promptly issues a warning signal. After the warning signal is issued, it quickly cuts off the LNG flow and starts an emergency response procedure;

[0008] The rapid transfer and filling unit includes a rapid transfer subunit and a filling subunit; the rapid transfer subunit is used to extract and fill LNG in the event of a tank truck accident; the filling subunit is used to fill LNG in the on-board LNG storage device into the vehicle involved in the emergency response as needed;

[0009] The safety protection unit is used to monitor the pressure inside the tank truck, detect when the pressure rises too quickly or is about to exceed the safety setting value, and immediately start pressure relief.

[0010] In the above technical solution, the rapid transport and filling unit includes a pressure relief mechanism, a liquid discharge mechanism and a filling mechanism;

[0011] The pressure relief mechanism includes a deflation pipeline, one end of which is connected to the tank truck gas phase connection mechanism;

[0012] The tank truck gas phase connection mechanism includes an accident tank truck gas phase group and a target tank truck gas phase group; the accident tank truck gas phase group includes an accident tank truck venting pipeline and a No. XII valve arranged on the accident tank truck venting pipeline, one end of the accident tank truck venting pipeline is connected to the venting pipeline, and the other end is provided with a d flange; the target tank truck gas phase group includes a target tank truck venting pipeline and a No. XIII valve arranged on the target tank truck venting pipeline, one end of the target tank truck venting pipeline is connected to the venting pipeline, and the other end is provided with an e flange;

[0013] The LNG storage mechanism and the nitrogen mechanism are respectively connected to the venting pipeline, and the LNG storage mechanism is arranged on a side away from the tank truck gas phase connection mechanism; a No. VIII valve is arranged on the venting pipeline between the LNG storage mechanism and the nitrogen mechanism;

[0014] The LNG storage mechanism includes a vehicle-mounted LNG storage device, the outlet end of the vehicle-mounted LNG storage device is connected to the venting pipeline through a pipeline, and a No. IX valve is arranged at the outlet end of the vehicle-mounted LNG storage device; and a No. I valve is arranged at the inlet end of the vehicle-mounted LNG storage device;

[0015] The nitrogen mechanism comprises a nitrogen pipeline and a valve No. XI arranged on the nitrogen pipeline, one end of the nitrogen pipeline is connected to the venting pipeline, and the other end is provided with an f flange, and the vehicle-mounted nitrogen storage device is connected to the f flange;

[0016] The discharge mechanism includes a discharge pipeline, an accident tank truck discharge pipeline group and a target tank truck discharge pipeline;

[0017] The filling mechanism includes a filling pipeline and a one-way valve, a flow meter and an XIV valve arranged on the filling pipeline in sequence. One end of the filling pipeline is connected to the drainage pipeline, and a b flange is arranged on the other end of the filling pipeline. A No. V valve is arranged on the drainage pipeline between the connection between the filling pipeline and the drainage pipeline and the connection between the pump pipeline and the drainage pipeline.

[0018] In the above technical solution, the other end of the gas discharge pipeline is connected to a flare, and an X-valve is arranged at the gas inlet end of the flare; a coil pipe device is arranged on the pipeline at the gas inlet end of the X-valve, and a part of the gas discharge pipeline is wound around the coil pipe device; the gas phase pipeline of the accident tanker is connected to the d flange through a hose; the gas phase pipeline of the transfer target tanker is connected to the e flange through a hose.

[0019] In the above technical solution, one end of the liquid discharge pipeline is connected to the inlet of the on-vehicle LNG storage device, and the other end of the liquid discharge pipeline is connected to the gas discharge pipeline; the accident tanker liquid discharge pipeline group includes a pump pipeline and an LNG pipeline connected in parallel, one ends of the pump pipeline and the LNG pipeline are both connected to the liquid discharge pipeline, and the other ends are provided with a flanges; a pump and a No. IV valve are arranged in sequence on the pump pipeline; a No. II valve is arranged on the LNG pipeline, and a No. III valve is arranged on the liquid discharge pipeline between the connection of the pump pipeline and the liquid discharge pipeline and the connection of the LNG pipeline and the liquid discharge pipeline; one end of the target tanker liquid discharge pipeline is connected to the liquid discharge pipeline, and the other end is provided with a c flange, and a No. VI valve is arranged on the target tanker liquid discharge pipeline; a No. VII valve is arranged on the liquid discharge pipeline between the connection of the target tanker liquid discharge pipeline and the liquid discharge pipeline and the connection of the liquid discharge pipeline and the gas discharge pipeline.

[0020] In the above technical solution, the mobile chassis unit is made of high-strength lightweight materials, and the mobile chassis unit is equipped with all-wheel drive and an intelligent suspension system.

[0021] In the above technical solution, the emergency monitoring and analysis unit includes a monitoring mechanism, an analysis mechanism and an alarm mechanism; the monitoring mechanism includes a high-precision gas sensor and a laser scanner; the analysis mechanism is used for real-time processing of the data of the high-precision gas detector and the laser scanner; the alarm mechanism includes an audible and visual alarm device and an emergency cut-off valve.

[0022] In the above technical solution, the safety protection unit includes pressure gauges arranged at the inlet part and the outlet part of the tool vehicle storage tank.

[0023] The beneficial effects of the present invention are:

[0024] The present invention provides an LNG tanker mobile multi-functional and efficient emergency disposal integrated system. Through the innovative design of integration and intelligence, rapid response and efficient disposal are realized. It not only greatly improves the efficiency and safety of emergency disposal and transportation, effectively reduces the risks of personnel and the environment, but also significantly shortens the emergency disposal time and reduces energy loss. The invention has both the functions of temporary LNG storage and transportation, can provide timely emergency support for LNG receiving stations, gas filling stations, etc., and shows extremely high practical value and social significance. It further reduces energy consumption and operating costs, improves energy utilization efficiency, and injects new vitality into sustainable development. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the present invention;

[0026] Figure 2 is a schematic structural diagram of the rapid transfer and filling unit in the present invention.

[0027] Wherein:

[0028] 100, mobile chassis unit; 200, emergency monitoring and analysis unit; 300, rapid transfer and filling unit; 400, safety protection unit;

[0029] 1, on-vehicle LNG storage device; 2, on-vehicle nitrogen storage device; 3, coil winder; 4, flare; 5, pump; 6, flowmeter; 7, check valve; 8, No. I valve; 9, No. II valve; 10, No. III valve; 11, No. IV valve; 12, No. V valve; 13, No. VI valve; 14, No. VII valve; 15, No. VIII valve; 16, No. IX valve; 17, No. X valve; 18, No. XI valve; 19, No. XII valve; 20, No. XIII valve; 21, No. XIV valve; 22, a flange; 23, b flange; 24, c flange; 25, d flange; 26, e flange; 27, f flange; 28, gas discharge pipeline.

[0030] For those of ordinary skill in the art, without creative efforts, other related drawings can be obtained according to the above drawings. Detailed Embodiments

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below in conjunction with the drawings in the specification and through specific embodiments.

[0032] As Figure 1 shown, an LNG tanker mobile multi-functional and highly efficient emergency disposal integrated system includes:

[0033] The mobile chassis unit (100) is installed in the tool vehicle and provides an installation platform for the emergency monitoring and analysis unit (200), the rapid transfer and filling unit (300), and the safety protection unit (400);

[0034] The emergency monitoring and analysis unit (200) monitors the gas concentration around the accident LNG tanker in real time. When it detects a rapid increase in gas leakage or abnormal gas concentration, it issues a warning signal in a timely manner. After the warning signal is issued, it quickly cuts off the LNG flow and starts the emergency response procedure;

[0035] Quick transfer and filling unit (300), which includes a quick transfer sub-unit and a filling sub-unit; the quick transfer sub-unit is used to accurately extract and fill LNG through an integrated high-precision pumping device and a flow meter in case of a tanker accident, and connect the accident tanker to the target tanker or on-vehicle LNG storage device through a standardized quick connector, so as to quickly transfer the LNG in the accident tanker to the target tanker or on-vehicle LNG storage device; the filling sub-unit is used to be able to accurately extract LNG from the on-vehicle LNG storage device through a pumping device, accurately measure it through a flow meter, and fill it into the vehicles participating in emergency disposal as fuel according to needs, which can improve the efficiency and guarantee of emergency disposal;

[0036] Safety protection unit (400), which is used to monitor the pressure inside the tanker through a pressure gauge, detect that the pressure rises too fast or is about to exceed the safety set value, immediately open the valve inside the tanker and direct the excess pressure to the flare of the high-efficiency emergency disposal integrated system in an orderly manner for pressure relief;

[0037] The mobile chassis unit (1) uses high-strength lightweight materials to ensure that the system has sufficient strength, and is convenient for transportation and mobility at the same time; and the mobile chassis unit (1) is equipped with all-wheel drive and an intelligent suspension system to enhance the adaptability to complex terrains and bad weather conditions, ensure the stable operation of the system, and ultimately ensure that each system can be quickly deployed and effectively respond to emergencies;

[0038] The mobile chassis unit (100) uses the model of Terex, an American manufacturer. The all-terrain heavy-duty chassis solution provided by Terex is widely used in the industrial and emergency fields, has superior traction and stability, and is especially suitable for complex terrains and harsh climate conditions; the mobile chassis unit (100) and the tool vehicle use a standardized fixed hinge joint to ensure quick and safe fixation of the chassis and the cargo unit.

[0039] The emergency monitoring and analysis unit (200) includes a monitoring mechanism, an analysis mechanism and an alarm mechanism; the monitoring mechanism includes a high-precision gas sensor and a laser scanner; the gas sensor is installed at a suitable height around the tool vehicle, usually selected on the upper parts on both sides of the tool vehicle to better detect the diffusion of gas leakage. For light gases such as methane, the gas sensor should be installed at a higher position; for toxic gases (such as carbon monoxide), it should be installed at a position lower than the height of the human eye; the laser scanner is installed on the top or side of the tool vehicle and can scan the gas leakage area around the vehicle body in all directions; according to needs, a rotary laser scanner can be selected to achieve a 360-degree panoramic scan;

[0040] The analysis mechanism is used to process the data of the high-precision gas detector and the laser scanner in real time. The manufacturer model of the analysis mechanism is Siemens S7-1500 PLC. According to the preset algorithms and thresholds, it analyzes the changing trend of the gas concentration and the location of the gas leakage source. The analysis mechanism is wirelessly connected to the emergency cut-off valve and the audible and visual alarm device to ensure that the system can automatically respond according to the decision. The manufacturer model of the audible and visual alarm device is SearchPoint Optima Plus;

[0041] The alarm mechanism includes an audible and visual alarm device and an emergency cut-off valve; the audible and visual alarm device is installed in a place where it is easy to hear and can cover the entire operation area, usually installed on the top or both sides of the tool vehicle; the audible and visual alarm device can quickly cover the staff and surrounding personnel in case of leakage; the emergency cut-off valve is usually installed at the inlet and outlet pipelines of the LNG tanker to ensure that the LNG flow can be quickly cut off in case of gas leakage or abnormal concentration; according to the system design, there may be multiple emergency cut-off valves, which are installed on different pipelines respectively.

[0042] In the emergency monitoring and analysis unit (2), the gas concentration around the accident LNG tanker is monitored in real time through the high-precision gas detector and the laser scanning technology. When it is detected that the gas leakage speed increases or the gas concentration is abnormal, a warning signal is sent in time to remind the activation of the corresponding emergency response procedure. The specific steps are as follows:

[0043] S1. The gas concentration around the accident LNG tanker is monitored in real time through the high-precision gas detector (such as semiconductor sensors, electrochemical sensors, etc.). Through the monitored gas concentration changes, the leakage rate is estimated; these sensors have the ability to detect low-concentration gases and can quickly respond to the gas concentration changes generated during LNG leakage, especially being sensitive to the gas concentration changes in a short time. As the gas leaks, the concentration changes reflect the changes in the leakage amount. By calculating the concentration change rate, the system can reverse the leakage source and the leakage amount.

[0044] The specific content of S1 is as follows:

[0045]

[0046] Among them, C i (t) is the gas concentration at the i-th measurement point at time y; S sensor is the calibration signal of the sensor; A sensor is the sensitivity coefficient of the sensor; Signal(t) is the electrical signal output at the i-th measurement point at time t;

[0047]

[0048] Among them, Q leakis the leakage rate; ΔC(t) is the change in gas concentration per unit time; V air is the air volume; Δt is the sampling time interval.

[0049] S2. Use laser scanning technology to detect the distribution of gas concentration in space, inversely calculate the specific location of the leakage source, and combine the gas diffusion model and environmental factors to predict the expansion range of the gas in space. During the process of using laser scanning technology to detect the distribution of gas concentration in space and inversely calculating the specific location of the leakage source, the influencing factor of wind speed is introduced for optimization; the laser scanning technology can measure the distribution of gas concentration by scanning the surrounding environment with laser beams and draw a spatial distribution map of gas concentration. Laser scanning can provide high-precision three-dimensional spatial information, thus realizing the positioning of the leakage source; the laser scanning system can inversely calculate the location of the gas leakage source by combining the data of gas concentration sensors through the principle of triangulation or the cooperation of multi-point sensors. This process needs to consider the law of gas diffusion, that is, the propagation path of the gas in space, and determine the specific coordinates of the leakage source by comparing the concentrations at different sensor points.

[0050] Through the sensor network installed near the accident site, the concentration of natural gas (mainly methane) in the air can be continuously detected. Once gas leakage or concentration exceeding the safety threshold is detected, the system will automatically trigger a warning signal to notify on-site staff and the remote monitoring center to take emergency actions. This immediate response mechanism can effectively prevent potential fire or explosion risks, protect the safety of people's lives and property, and reduce the possibility of environmental pollution.

[0051] The advantage of accurately locating the leakage position is that it can help the rescue team quickly lock the source of the problem, thus more effectively implementing the emergency rescue plan. For example, in a complex accident scenario, if it is accurately known which part the leakage occurs in, fire-fighting resources can be deployed targeted, a reasonable warning area can be set up, and unnecessary large-scale evacuations can be avoided; at the same time, it can also provide guidance for the repair work to ensure that maintenance personnel directly reach the fault point and improve the handling efficiency. In addition, accurate positioning is also helpful for subsequent investigation and analysis, understanding the cause of the accident, and providing a basis for improving the design and operating procedures.

[0052] In the above S2, when using laser scanning technology to detect the distribution of gas concentration in space and inversely calculate the specific location of the leakage source, the specific steps are as follows:

[0053] The gas concentration expression combining the Gaussian diffusion model and the leakage rate:

[0054]

[0055] Among them, C(x, y, z, t) is the gas concentration at the spatial position (x, y, z) and time t; r is the distance from the leakage source to the measurement point; r0 is the distance from the leakage source to the initial measurement point; σ is the standard deviation of gas diffusion; θ is the laser scanning angle;

[0056] Since gas diffusion is a three-dimensional process, the concentration will decay as the distance increases. The Gaussian diffusion model reflects this, especially r and σ reflect the effect of gas diffusion from the source point in all directions; cos(θ) corrects the influence of the laser scanning angle on the concentration measurement.

[0057] Solve for the optimal position of the leakage source by minimizing the measurement error:

[0058]

[0059] Among them, Z is the minimized loss function; n is the number of measurement points; r i is the distance from the measurement point (x i , y i , z i ) to the leakage source; θ i is the laser scanning angle of the i-th measurement point; (x0, y0, z0) is the position of the leakage source.

[0060] The optimization process is as follows:

[0061] 1. Initialization: Select the initial leakage source position (x0, y0, z0), the initial leakage rate Q leak , and the initial diffusion coefficient σ;

[0062] 2. Calculate the error: According to the given concentration C i (t) of the measurement point, calculate the error of each measurement point, that is, the gap between the measured concentration and the concentration predicted by the leakage rate and the diffusion model;

[0063] 3. Gradient descent method: Use the gradient descent method to calculate the gradients of the loss function with respect to the leakage source position (x0, y0, z0), the leakage rate Q leak and the diffusion standard deviation σ, and gradually adjust these parameters until the error is minimized;

[0064] 4. Convergence determination: When the change in parameter update is less than the preset threshold, the algorithm converges, and the final leakage source position (x0, y0, z0) and leakage rate Q leak are obtained;

[0065] In the above S2, the influence factor of wind speed is introduced to optimize the process of inversely calculating the specific position of the leakage source. Because in a windy environment, the range of gas diffusion becomes larger, thus affecting the spatial distribution of gas concentration. After optimization, it is specifically:

[0066]

[0067] where C'(x, y, z, t) is the gas concentration at the optimized spatial position (x, y, z) and time t; v wind is the wind speed factor;

[0068]

[0069] where Z' is the optimized minimized loss function.

[0070] By considering the leakage rate Q leak , the spatial distribution model of gas concentration is improved, making the dynamic relationship between gas concentration change and leakage source closer; by combining the concentration data of multiple laser scanning points and optimizing through the least squares method, the position and leakage rate of the leakage source are estimated; the wind speed factor v wind is introduced to more accurately simulate the influence of environmental factors on gas diffusion; this method can effectively combine laser scanning technology, leakage rate and environmental factors to conduct more accurate gas leakage source positioning.

[0071] S3. After calculating the leakage source position, use the data fusion and anomaly detection algorithms of multiple measurement points to determine whether there is gas leakage. When it is detected that there is an increase in gas leakage speed or abnormal gas concentration, the system will automatically trigger a warning reminder and start the corresponding emergency response procedure.

[0072] After obtaining the leakage source position, use the data fusion and anomaly detection algorithms of multiple sensors to determine whether there is gas leakage and issue a warning in a timely manner. Once a leakage event is detected, the system will automatically trigger a warning and start the emergency response procedure. By combining real-time data from different sensors (including gas concentration sensors, laser scanners, anemometers, thermometers, etc.), the system can more comprehensively understand the overall situation of gas leakage. For example, the change in gas concentration can be combined with environmental conditions (such as wind speed, humidity, etc.) to provide a more accurate leakage trend analysis;

[0073] Based on data fusion, an anomaly detection algorithm is used to determine whether gas leakage has occurred. The algorithm identifies abnormal fluctuations in gas concentration by comparing the sensor data with historical data or with preset thresholds. Once an anomaly is detected, the system will immediately trigger a warning and notify the staff through an alarm.

[0074] The specific content of S3 is as follows:

[0075]

[0076] where C'(t) is; m is the number of sensors; w i$w_i$ is the weight of the $i$-th sensor, usually assigned according to factors such as the accuracy and location of the sensor. Sensors closer to the leak source may be given greater weights; $C'(t)$ is the weighted average concentration value calculated at time $t$, usually obtained by fusing data from multiple sensors; $\lambda$ is a preset threshold. Setting multiple hierarchical thresholds means that when the detected error or deviation reaches a certain standard, it is considered that the system has an anomaly. The threshold $\lambda$ can be adjusted according to actual needs. Too small a value may lead to false alarms, while too large a value may lead to missed alarms;

[0077] If $C'(t)$ exceeds a certain threshold $\lambda$, it can be considered that the system has an anomaly. This means that the measured values of some sensors deviate too much from the weighted average value, which may indicate that a gas leakage event has occurred, resulting in inconsistent readings between some sensors and other sensors.

[0078] The emergency response procedure includes an emergency pressure transfer and relief system, a nitrogen purging system, a transfer assessment system, and a leakage measurement system; among them, the emergency pressure transfer and relief and leakage measurement systems are integrated with venting and monitoring devices to cope with the risk of fire or explosion; the nitrogen purging system is equipped with high-pressure nitrogen cylinders and purging pipelines to clean the residual LNG in case of a tanker accident and prevent secondary leakage. Once a fire or abnormal temperature is detected, the nitrogen purging system is automatically activated to protect the surrounding environment and personnel safety; the transfer assessment system is used to estimate the time required for transfer by evaluating the leakage situation and guide on-site emergency and transfer disposal work.

[0079] As Figure 2 shown, the rapid transfer and filling unit 300 includes a pressure relief mechanism, a liquid discharge mechanism, and a filling mechanism;

[0080] The pressure relief mechanism includes a vent pipeline 28. One end of the vent pipeline 28 is connected to the flare 4, and the other end is connected to the tanker gas phase connection mechanism;

[0081] The tanker gas phase connection mechanism includes an accident tanker gas phase group and a target tanker gas phase group; the accident tanker gas phase group includes an accident tanker vent pipeline and a No. XII valve 19 provided on the accident tanker vent pipeline. One end of the accident tanker vent pipeline is communicated with the vent pipeline 28, and the other end is provided with a d flange 25. The gas phase pipeline of the accident tanker is connected to the d flange 25 through a hose; the target tanker gas phase group includes a target tanker vent pipeline and a No. XIII valve 20 provided on the target tanker vent pipeline. One end of the target tanker vent pipeline is communicated with the vent pipeline 28, and the other end is provided with an e flange 26. The gas phase pipeline of the transfer target tanker is connected to the e flange 26 through a hose;

[0082] The intake end of the torch 4 is provided with a valve No. X 17, and a coil device 3 is arranged on the pipeline at the intake end of the valve No. X 17. Part of the discharge pipeline 28 is coiled inside the coil device 3, and the length can be adjusted telescopically.

[0083] An LNG storage mechanism and a nitrogen mechanism are respectively connected to the discharge pipeline 28 between the torch 4 and the gas-phase connection mechanism of the tank truck, and the LNG storage mechanism is arranged on the side close to the torch 4; a valve No. VIII 15 is arranged on the discharge pipeline 28 between the LNG storage mechanism and the nitrogen mechanism.

[0084] The LNG storage mechanism includes an on-vehicle LNG storage device 1. The outlet end of the on-vehicle LNG storage device 1 is connected to the discharge pipeline 28 through a pipeline, and a valve No. IX 16 is arranged at the outlet end of the on-vehicle LNG storage device 1; a valve No. I 8 is arranged at the inlet end of the on-vehicle LNG storage device 1.

[0085] The nitrogen mechanism includes a nitrogen pipeline and a valve No. XI 18 arranged on the nitrogen pipeline. One end of the nitrogen pipeline is communicated with the discharge pipeline 28, and the other end is provided with an f flange 27. The on-vehicle nitrogen storage device 2 is connected to the f flange 27.

[0086] The liquid discharge mechanism includes a liquid discharge pipeline, an accident tank truck liquid discharge pipeline group and a target tank truck liquid discharge pipeline.

[0087] One end of the liquid discharge pipeline is connected to the inlet of the on-vehicle LNG storage device 1, and the other end of the liquid discharge pipeline is connected to the discharge pipeline 28.

[0088] The accident tank truck liquid discharge pipeline group includes a pump pipeline and an LNG pipeline connected in parallel. One ends of the pump pipeline and the LNG pipeline are both connected to the liquid discharge pipeline, and the other ends are provided with an a flange 22; a pump 5 and a valve No. IV 11 are arranged in sequence on the pump pipeline; a valve No. II 9 is arranged on the LNG pipeline, and a valve No. III 10 is arranged on the liquid discharge pipeline between the connection of the pump pipeline and the liquid discharge pipeline and the connection of the LNG pipeline and the liquid discharge pipeline.

[0089] One end of the target tank truck liquid discharge pipeline is connected to the liquid discharge pipeline, and the other end is provided with a c flange 24. A valve No. VI 13 is arranged on the target tank truck liquid discharge pipeline; a valve No. VII 14 is arranged on the liquid discharge pipeline between the connection of the target tank truck liquid discharge pipeline and the liquid discharge pipeline and the connection of the liquid discharge pipeline and the discharge pipeline 28.

[0090] The filling mechanism includes a filling pipeline and a check valve 7, a flowmeter 6 and a valve No. XIV 21 arranged in sequence on the filling pipeline. One end of the filling pipeline is communicated with the liquid discharge pipeline, and the other end is provided with a b flange 23; a valve No. V 12 is arranged on the liquid discharge pipeline between the connection of the filling pipeline and the liquid discharge pipeline and the connection of the pump pipeline and the liquid discharge pipeline.

[0091] The safety protection unit 400 includes pressure gauges disposed at the inlet and outlet of the storage tank of the tool vehicle. The pressure gauges are connected to the emergency monitoring and analysis unit 200 through sensors (such as 4-20mA output signals). When the pressure exceeds the set safety range, the emergency monitoring and analysis unit 200 automatically alarms and activates emergency measures.

[0092] The usage method of the rapid transfer and filling unit of the present invention:

[0093] (Ⅰ) The specific operation of the accident tanker to the system pressure relief is as follows:

[0094] Connect the gas pipeline of the accident tanker to the d flange 25 through a hose, connect the gas pipeline of the transfer target tanker B to the e flange 26 through a hose, close the valves of valve VII 14, valve VIII 15, valve IX 16, valve XII 19, valve XIII 20, open valve X 17, connect the vehicle-mounted nitrogen through the f flange 27, open valve XI 18 to purge the discharge pipeline and then close it, open valve XII 19 and the gas pipeline of the accident tanker A, remotely discharge BOG according to the pressure rise rate of the accident tanker to relieve the pressure of the accident tanker, open valve XIII 20 and the gas pipeline valve of the tanker according to actual needs to relieve the pressure of the transfer target tanker, and open valve IX 16 according to the actual situation to relieve the pressure of the vehicle-mounted LNG storage device. During the operation, the evaluation threshold selects the torch 4 for ignition and discharge.

[0095] (Ⅱ) The specific operation of the accident tanker to the system rapid liquid discharge is as follows:

[0096] Connect the gas pipeline of the accident tanker to the d flange 25 through a hose, and connect the liquid pipeline of the accident tanker to the a flange 22 through a hose. Close the valves of valve I 8, valve IV 11, valve IX 16, valve XIV 21, valve XII 19, valve XIII 20, open valve X 17, connect the vehicle-mounted nitrogen storage device 2 through the f flange 27, open valve XI 18, valve X 17, valve VIII 15, valve VII 14, valve II 9, valve III 10 to purge the discharge pipeline and the liquid discharge pipeline and then close them. Open valve X 17 and valve IX 16 to relieve the pressure of the vehicle-mounted LNG storage device 1 to below 100KPa and maintain it. Open valve I 8, valve II 9 and the liquid pipeline of the accident tanker to make the LNG in the accident tanker flow to the vehicle-mounted LNG storage device 1 due to the pressure difference, and closely monitor the height of the liquid level gauge.

[0097] (Ⅲ) The specific operation of the accident tanker to the target tanker transfer is as follows:

[0098] Connect the gas phase pipeline of the accident tank truck to the d flange 25 through a hose, connect the liquid phase pipeline of the accident tank truck to the a flange 22 through a hose, connect the gas phase pipeline of the transfer target tank truck to the e flange 26 through a hose, connect the liquid phase pipeline of the transfer target tank truck to the c flange 24 through a hose, close valves No. Ⅰ valve 8, No. Ⅳ valve 11, No. Ⅸ valve 16, and XIV valve 21, open No. Ⅹ valve 17, connect the on-board nitrogen storage device 2 through the f flange 27, open No. Ⅺ valve 18, No. Ⅹ valve 17, No. Ⅶ valve 14, V8, V2, V3 , V12, V13, V6 are closed after purging the discharge pipeline and the liquid discharge pipeline, and valve V13, valve No. VIII 15, and valve No. X 17 are opened to release the pressure on the target tank truck and maintain it, confirm that valve No. I valve 8, valve No. II 9, valve No. III 10, valve No. VII 14, and valve XIV 21 are closed, and valve No. IV 11, valve No. V 12, valve No. VI 13 and the valves of the liquid phase pipeline of the accident tank truck and the valves of the liquid phase pipeline of the target tank truck are opened, and pump 5 is started to make the LNG in the accident tank truck flow quickly to the target tank truck, and pay close attention to the liquid level gauge and pressure of the target tank truck;

[0099] At the same time, valve No. XII 19, valve No. XIII 20, valve No. VIII 15 and valve No. X 17 will be opened to release the pressure on the target tank truck and maintain the pressure, and discharge it through the flare 4. When the pressure is overloaded during the transfer from the accident tank truck to the target tank truck, the above valves will be opened and the flare 4 will be ignited according to the pressure requirements of the accident tank truck and the target tank truck to realize the pressure relief function.

[0100] (IV) The specific operation of LNG filling from the on-board LNG storage device to the target tank truck is as follows:

[0101] Open valve XI 18, valve VII 14, valve XIV 21, valve V 12, valve III 10, valve II 9, close other valves, purge the filling pipeline and liquid inlet pipeline and then close the valves, blind flange a 22 with a blind plate, connect it to the check valve 7 and the flowmeter 6 through a 3-inch pipeline, open valve I 8, valve II 9, valve V 12, valve VII 14, valve VIII 15, valve X 17, close all other valves, introduce LNG into the pump and then close valve VII 14, valve VIII 15, valve X 17 to prevent LNG backflow, start the pump, open valve XIV 21 and control the amount of LNG loaded from the on-board LNG storage device 1 into the target tank truck through the flowmeter to achieve LNG filling of the target tank truck.

[0102] (V) The specific operation of nitrogen replacement from the system to the accident tank truck and the target tank truck is as follows:

[0103] Connect the gas phase pipeline of the accident tank truck to the d flange 25 through a hose, connect the liquid phase pipeline of the accident tank truck to the a flange 22 through a hose, connect the gas phase pipeline of the target tank truck to the e flange 26 through a hose, connect the liquid phase pipeline of the target tank truck to the c flange 24 through a hose, open valve No. XI 18, valve No. VII 14, valve No. V 12, valve No. III 10, close other valves, open valve No. XIII 20 or valve No. XII 19 or valve No. XIV 21 or valve No. II 9 and the corresponding tank truck pipeline valves as needed, open valve No. XI 18 to replace the nitrogen of the accident tank truck and the target tank truck through the on-board nitrogen storage device 2, so as to realize the nitrogen replacement of the demand pipeline of the accident tank truck or the target tank truck.

[0104] (VI) The on-board LNG storage device is loaded back into the target tanker or receiving station through pressure or starting pump. The specific operation is as follows:

[0105] (VI-i) LNG reverse loading from vehicle-mounted LNG storage device to receiving station or target tank truck:

[0106] Connect the C flange 24 to the receiving station's tank truck loading liquid phase pipeline or the target tank truck's liquid phase pipeline, open valve Ⅰ 8, valve Ⅳ 11, valve Ⅴ 12, valve Ⅵ 13, close all other valves, start the pump, open the valve connected to the receiving station's tank truck loading liquid phase pipeline or the target tank truck's liquid phase pipeline valve, and realize the reverse loading of the LNG liquid in the on-board LNG storage device back to the receiving station interface or the target tank truck;

[0107] (VI-II) LNG reloading vehicle where the onboard LNG storage device is reloaded back to the receiving station or target tanker by pressure reloading:

[0108] Connect the c flange 24 to the tank truck loading liquid phase pipeline of the receiving station or the target tank truck liquid phase pipeline, open valve Ⅰ 8, valve Ⅲ 10, valve Ⅴ 12, valve Ⅵ 13, close all other valves, open valve Ⅸ 16, valve Ⅷ 15, valve Ⅺ 18 and connect to the vehicle-mounted nitrogen storage device 2 through the f flange 27, inject nitrogen for pressurization, open the valve connected to the tank truck loading liquid phase pipeline of the receiving station or the target tank truck liquid phase pipeline, and realize the reverse loading of LNG liquid in the vehicle-mounted LNG storage device 1 back to the receiving station interface or the target tank truck;

[0109] When the target tank truck is reinstalled by pressure, the e flange 26 can be connected to the gas phase pipeline of the target tank truck through a hose. When the pressure of the target tank truck increases, close valve No. XI 18 and valve No. VIII 15 to stop nitrogen injection and pressurization, open valve No. XIII 20, valve No. X 17 and the gas phase pipeline valve of the target tank truck to release pressure through the flare 4, and evaluate the threshold to ignite the flare to achieve the pressure relief function.

[0110] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0111] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0112] The applicant declares that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived within the technical scope disclosed by the present invention by those skilled in the art all fall within the protection scope and the disclosure scope of the present invention.

Claims

1. A mobile multifunctional and efficient emergency disposal integrated system for LNG tank trucks, characterized by: include: A mobile chassis unit (100) is installed in the tool vehicle and provides an installation platform for the emergency monitoring and analysis unit (200), the rapid transport and filling unit (300) and the safety protection unit (400); The emergency monitoring and analysis unit (200) monitors the gas concentration around the accident tanker in real time, and when a rapid increase in gas leakage or abnormal gas concentration is detected, a warning signal is issued in time, and after the warning signal is issued, the flow of LNG is quickly cut off and an emergency response procedure is initiated; The rapid transport and filling unit (300) comprises a rapid transport subunit and a filling subunit; the rapid transport subunit is used to extract and fill LNG in the event of a tank truck accident; The filling subunit is used to fill the LNG in the on-board LNG storage device into the vehicles involved in emergency response as needed; The safety protection unit (400) is used to monitor the pressure inside the tank truck, detect when the pressure rises too fast or is about to exceed the safety setting value, and immediately start pressure relief.

2. The LNG tanker mobile multifunctional and efficient emergency disposal integrated system according to claim 1 is characterized by: The rapid transport and filling unit (300) comprises a pressure relief mechanism, a liquid discharge mechanism and a filling mechanism; The pressure relief mechanism comprises a deflation pipeline (28), one end of which is connected to the tank truck gas phase connection mechanism; The tank truck gas phase connection mechanism comprises an accident tank truck gas phase group and a target tank truck gas phase group; the accident tank truck gas phase group comprises an accident tank truck gas release pipeline and a No. XII valve (19) arranged on the accident tank truck gas release pipeline, one end of the accident tank truck gas release pipeline is connected to the gas release pipeline (28), and the other end is provided with a D flange (25); the target tank truck gas phase group comprises a target tank truck gas release pipeline and a No. XIII valve (20) arranged on the target tank truck gas release pipeline, one end of the target tank truck gas release pipeline is connected to the gas release pipeline (28), and the other end is provided with an E flange (26); The venting pipeline (28) is connected to the LNG storage mechanism and the nitrogen mechanism respectively, and the LNG storage mechanism is arranged on a side away from the tank truck gas phase connection mechanism; a No. VIII valve (15) is arranged on the venting pipeline (28) between the LNG storage mechanism and the nitrogen mechanism; The LNG storage mechanism comprises an on-vehicle LNG storage device (1), the outlet end of the on-vehicle LNG storage device (1) is connected to a venting pipeline (28) via a pipeline, and a No. IX valve (16) is provided at the outlet end of the on-vehicle LNG storage device (1); and a No. I valve (8) is provided at the inlet end of the on-vehicle LNG storage device (1); The nitrogen mechanism comprises a nitrogen pipeline and a valve No. XI (18) arranged on the nitrogen pipeline, one end of the nitrogen pipeline is connected to the venting pipeline (28), and the other end is provided with an f flange (27), and the vehicle-mounted nitrogen storage device (2) is connected to the f flange (27); The discharge mechanism includes a discharge pipeline, an accident tank truck discharge pipeline group and a target tank truck discharge pipeline; The filling mechanism comprises a filling pipeline and a one-way valve (7), a flow meter (6) and a XIV valve (21) which are sequentially arranged on the filling pipeline. One end of the filling pipeline is connected to the drainage pipeline, and a b flange (23) is arranged on the other end of the filling pipeline. A V valve (12) is arranged on the drainage pipeline between the connection point between the filling pipeline and the drainage pipeline and the connection point between the pump pipeline and the drainage pipeline.

3. The LNG tanker mobile multifunctional and efficient emergency disposal integrated system according to claim 2 is characterized by: The other end of the venting pipeline (28) is connected to the flare (4), and a valve No. X (17) is provided at the air inlet end of the flare (4); a coil (3) is provided at the air inlet end pipeline of the valve No. X (17), and a portion of the venting pipeline (28) is coiled on the coil (3); the gas phase pipeline of the accident tank truck is connected to the d flange (25) through a hose; and the gas phase pipeline of the transfer target tank truck is connected to the e flange (26) through a hose.

4. The LNG tanker mobile multifunctional and efficient emergency disposal integrated system according to claim 2 is characterized by: One end of the discharge pipeline is connected to the inlet of the vehicle-mounted LNG storage device (1), and the other end of the discharge pipeline is connected to the venting pipeline (28); the accident tank truck discharge pipeline group includes a pump pipeline and an LNG pipeline connected in parallel, one end of the pump pipeline and the LNG pipeline are both connected to the discharge pipeline, and the other end is provided with a flange a (22); a pump (5) and a valve No. IV (11) are arranged on the pump pipeline in sequence; a valve No. II (9) is arranged on the LNG pipeline, and a valve No. III (10) is arranged on the discharge pipeline between the connection between the pump pipeline and the discharge pipeline and the connection between the LNG pipeline and the discharge pipeline; one end of the target tank truck discharge pipeline is connected to the discharge pipeline, and the other end is provided with a flange c (24), and a valve No. VI (13) is arranged on the target tank truck discharge pipeline; a valve No. VII (14) is arranged on the discharge pipeline between the connection between the target tank truck discharge pipeline and the discharge pipeline and the connection between the discharge pipeline and the venting pipeline (28).

5. The LNG tanker mobile multifunctional and efficient emergency disposal integrated system according to claim 1 is characterized by: The mobile chassis unit (100) is made of high-strength and lightweight materials, and the mobile chassis unit (100) is equipped with an all-wheel drive and intelligent suspension system.

6. The LNG tanker mobile multifunctional and efficient emergency disposal integrated system according to claim 1 is characterized by: The emergency monitoring and analysis unit (200) comprises a monitoring mechanism, an analysis mechanism and an alarm mechanism; the monitoring mechanism comprises a gas sensor and a laser scanner; the analysis mechanism is used for real-time processing of data from a high-precision gas detector and a laser scanner; and the alarm mechanism comprises an audible and visual alarm device and an emergency shut-off valve.

7. The LNG tanker mobile multifunctional and efficient emergency disposal integrated system according to claim 1 is characterized by: The safety protection unit (400) comprises pressure gauges arranged at the inlet and outlet of the tank of the tool vehicle.

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