Space low-temperature chemical fuel leakage mobile emergency disposal system and disposal method thereof

Abstract

The application relates to the technical field of emergency disposal of aerospace low-temperature chemical fuel leakage, in particular to a mobile emergency disposal system for aerospace low-temperature chemical fuel leakage and a disposal method thereof. The mobile emergency disposal system for aerospace low-temperature chemical fuel leakage comprises a powder conveying assembly, a water conveying assembly and a first water-powder film-forming spraying element. The powder conveying assembly comprises a pneumatic driving element and a first sending tank. The first sending tank is used for storing water-absorbing resin composite material. The pneumatic driving element and the first sending tank and the first sending tank and the first water-powder film-forming spraying element are communicated through gas conveying pipes. The water conveying assembly comprises a hydraulic driving element and a first water conveying pipe. The first water-powder film-forming spraying element is communicated with the hydraulic driving element through the first water conveying pipe. When the water-absorbing resin composite material is combined with water, a gel state water film can be formed. The application has the effects of improving the emergency processing capacity of aerospace low-temperature chemical fuel leakage, controlling the accident in the budding and initial state in time, and reducing the possibility of secondary disasters such as fire and explosion.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of space low-temperature chemical fuel leakage emergency disposal technology, in particular to a space low-temperature chemical fuel leakage mobile emergency disposal system and a disposal method thereof. BACKGROUND

[0002] The development of China's aerospace field is rapid, and rockets play a crucial role as a carrier vehicle for space flight. Currently, China's new generation of space launch rocket propellant systems use low-temperature dual-component propellants such as liquid oxygen / liquid methane (liquid oxygen / liquid hydrogen), among which the liquid methane storage temperature is-161℃, and the liquid hydrogen storage temperature is-253℃.

[0003] Liquid oxygen / liquid methane (liquid oxygen / liquid hydrogen) low-temperature propellants have the advantages of being non-toxic, non-polluting, high specific impulse, and large thrust, but liquid methane (liquid hydrogen) as a combustible agent has the characteristics of being flammable, explosive, and volatile. In the process of production, transportation, storage, filling, launching, and leakage, if a leakage accident occurs, on the one hand, it is easy to cause low-temperature frostbite or suffocation; on the other hand, liquid methane (liquid hydrogen) accumulates in the form of a liquid pool on the ground under the condition of thermal equilibrium in the storage tank, and at the same time, it vaporizes violently, and its volume increases by hundreds of times in the process of rapid phase transition (BPT), forming a flammable and explosive vapor cloud. Under the ignition of a naked flame or an electric spark, it is easy to cause fires, explosions, and even detonation, which is a major hazard in space launch activities. In addition, when the liquid methane (liquid hydrogen) storage tank is exposed to a flame, the pressure in the tank rises, the temperature of the tank wall above the liquid surface (dry wall) rises rapidly, the strength of the wall tank decreases, and the dry wall will crack due to thermal plasticity within a certain time, resulting in a catastrophic boiling liquid vapor explosion fire. Numerous accident cases show that the danger of methane substances determines that the consequences of accidents caused by them will be very serious, for example: the explosion of the American Challenger spacecraft, and multiple explosions of the American Space Falcon 9 series rockets. Therefore, if a leakage accident occurs, if it is not handled in time, it will cause immeasurable loss to personnel life and facilities and equipment.

[0004] The key to disposing a liquid methane (liquid hydrogen) low-temperature fuel leakage accident is to control the accident in its infancy and initial state in time to prevent it from evolving into a fire, explosion, or other secondary disaster. The space low-temperature chemical fuel leakage emergency disposal method recorded in the related technology is generally as follows: once an accident occurs, a simple fire-fighting water spray cooling method is usually used for the leakage source and the adjacent storage tank. This method has the disadvantages of large water supply demand, poor heat insulation effect, no anti-reignition capability, insufficient protection, and the like, and is easy to cause fires, explosions, and other secondary disasters. Therefore, it is an urgent problem to be solved to design a space low-temperature chemical fuel (liquid methane, liquid hydrogen) leakage emergency handling device to improve the space low-temperature chemical fuel (liquid methane, liquid hydrogen) leakage emergency handling capability. SUMMARY

[0005] In order to improve the emergency treatment capability of space low-temperature chemical fuel leakage, control the accident in the bud and initial state in time, and reduce the possibility of secondary disasters such as fire and explosion, the application provides a space low-temperature chemical fuel leakage mobile emergency disposal system and a disposal method thereof.

[0006] The space low-temperature chemical fuel leakage mobile emergency disposal system and the disposal method thereof provided by the application adopt the following technical scheme:

[0007] A space low-temperature chemical fuel leakage mobile emergency disposal system comprises a powder conveying assembly, a water conveying assembly and a first water-powder film forming spray element.

[0008] The powder conveying assembly is used for blowing the powdery water-absorbing resin composite material into the first water-powder film forming spray element, and comprises a pneumatic driving element and a first sending tank. The first sending tank is used for storing the water-absorbing resin composite material. The pneumatic driving element and the first sending tank are communicated through a gas conveying pipe, and the first sending tank and the first water-powder film forming spray element are also communicated through the gas conveying pipe.

[0009] The water conveying assembly comprises a hydraulic driving element and a first water conveying pipe. The first water-powder film forming spray element is communicated with the hydraulic driving element through the first water conveying pipe.

[0010] The water-absorbing resin composite material can quickly form a gel state water film with fire-retardant and heat-insulating functions in combination with water.

[0011] By adopting the technical scheme, when a low-temperature propellant (liquid methane, liquid hydrogen) leakage accident occurs on site, the water power driving member is connected with an external water source, and the air power driving member is opened. Under the action of the air power driving member and the gas conveying pipe, the powdery water-absorbing resin composite material in the first sending tank is blown into the first water-powder film forming spray member. At the same time, the water power driving member is started, and water is conveyed into the first water-powder film forming spray member through the first water conveying pipe. At this time, the water-absorbing resin composite material and the water are combined to quickly form a gel state water film with fire-retardant and heat-insulating functions. The gel state water film is directionally sprayed onto the leakage tank body itself or the surrounding non-leakage (non-burning) tank body through the first water-powder film forming spray member, thereby playing a quick fire-retardant and heat-insulating protection role on the leakage tank body and the pipeline system. Compared with the traditional fire-fighting water agent, the gel state water film can save more than 90% of water, the fire-retardant effect is more than 6 times that of the fire-fighting water agent, the fire extinguishing area is 3-5 times that of the traditional fire extinguishing agent (water, foam), and the gel state water film has good anti-reburning ability. However, the traditional water fire-fighting cooling needs continuous water spraying, and the anti-reburning ability is poor. Therefore, compared with the existing water spraying cooling method, the gel state water film has an additional fire-retardant and heat-insulating effect, plays a quick fire-retardant and heat-insulating protection role on the protected tank and pipeline system, and greatly reduces the possibility of secondary disasters such as burning and explosion of the tank.

[0012] Optionally, the device further comprises a second water-powder film forming spray member, the powder conveying assembly further comprises a second sending tank, the water conveying assembly further comprises a second water conveying pipe, the air power driving member and the second sending tank are connected through a gas conveying pipe, the second sending tank and the second water-powder film forming spray member are connected through a gas conveying pipe, and the second water-powder film forming spray member and the water power driving member are connected through the second water conveying pipe.

[0013] By adopting the technical scheme, the first water-powder film forming spray member and the second water-powder film forming spray member can work at the same time under the action of the second water-powder film forming spray member and the second sending tank, thereby improving the working efficiency. Meanwhile, the first water-powder film forming spray member and the second water-powder film forming spray member can be selected to be different types of spray devices to meet different working requirements. In addition, the first water-powder film forming spray member and the second water-powder film forming spray member can also work independently, thereby improving the practicability.

[0014] Optionally, the powder conveying assembly further comprises a dust collector and a supply tank, the dust collector and the supply tank, the first sending tank and the dust collector, and the second sending tank and the dust collector are connected through gas conveying pipes.

[0015] By adopting the technical scheme, when the emergency treatment is completed, the sending tanks need to be treated, that is, the high-pressure gas in the sending tanks is discharged. At this time, the dust collector is opened, the gas in the sending tanks is discharged through the dust collector, and the residual water-absorbing resin composite material is collected and recycled in the supply tank.

[0016] Optionally, the air conveying pipe between the air driving member and the second sending tank is communicated with the air conveying pipe between the air driving member and the first sending tank, and the air conveying pipe between the second sending tank and the second water powder film forming nozzle is communicated with the air conveying pipe between the first sending tank and the first water powder film forming nozzle, and each air conveying pipe is provided with an air inlet valve.

[0017] By adopting the above technical scheme, the air conveying pipe is arranged in a ring shape and cooperates with the air inlet valve, so that the gas can flow stably in the air conveying pipe, and the water-absorbing resin composite material and the gas can be uniformly mixed, so that the water-absorbing resin composite material in a flow state is stably conveyed in the air conveying pipe.

[0018] Optionally, the forming time of the gel state water film is 10s-20s, the thickness of the gel state water film is adjustable, and the film forming thickness of the gel state water film ranges from 3mm to 30mm.

[0019] By adopting the above technical scheme, the thickness of the gel state water film is adjustable, and the appropriate thickness of the gel state water film can be determined according to the actual situation to achieve the purpose of energy saving. At the same time, the gel state water film has a fast forming speed and can be quickly formed and sprayed out.

[0020] Optionally, it also includes an air supply assembly for conveying air, the air supply assembly includes a fan, a frame and an air duct, the fan is installed on the frame, and one end of the air duct is connected to the frame, and the air direction is consistent with the axis of the air duct.

[0021] By adopting the above technical scheme, the air volume and air pressure of the axial flow induced high-speed range increasing fan are used to deliver large flow of air to the surface of the leaked liquid pool, and through the mechanical turbulent flow effect of air and the heat transfer effect of vaporized steam, the temperature of liquid methane (liquid hydrogen) vapor is increased and the density of gas cloud is reduced, which can play a certain lifting effect on the formed deposition cloud, prevent it from accumulating and diffusing along the ground, and accelerate its upward dilution and diffusion, so as to reduce the ground gas concentration to below the explosion limit, reduce the possibility of explosion accident, and ensure the safety of the disposal personnel.

[0022] Optionally, the air duct includes a first air cylinder and a second air cylinder, the second air cylinder is located between the first air cylinder and the frame, and the first air cylinder is in a conical shape.

[0023] By adopting the above technical scheme, the conical first air cylinder can constrain the motion trajectory of the air flow, increase the speed of the air flow in the horizontal direction, effectively constrain the air volume, and reduce the energy loss.

[0024] Optionally, the first air cylinder and the second air cylinder are coaxially arranged, and the first air cylinder is in a cylindrical shape.

[0025] By adopting the above technical scheme, the second wind pipe in the coaxial columnar shape can make the air flow velocity in the air duct present a step gradient distribution (high outside and low inside), and constrain the movement track of air.

[0026] Optionally, the air supply assembly further comprises a lifting device, which can change the height of the air supply assembly.

[0027] By adopting the above technical scheme, the lifting device can lift the fan to the required height (15 m from the ground), which can be beneficial to quickly disperse liquid methane gas and improve the processing efficiency.

[0028] Optionally, a space chemical fuel leakage emergency disposal method comprises the following steps:

[0029] Emergency plan disposal analysis;

[0030] Resin composite material is added into the first sending tank and the second sending tank respectively;

[0031] The system is moved to the appropriate position;

[0032] The hydraulic driving part is connected with an external water source;

[0033] The lifting device is adjusted to the appropriate height;

[0034] The fan is turned on, a large amount of air is transported to the leakage area in a directional manner, the leakage gas is forced to be diluted and diffused, so that the concentration of the leakage gas is controlled to be below the flammable and explosive limit;

[0035] The hydraulic driving part and the pneumatic driving part are started, and the gelatinous water film is formed within 10-20 seconds;

[0036] The first water powder film forming spray part and the second water powder film forming spray part are controlled to spray the gelatinous water film on the leakage or protected low-temperature fuel storage tank body;

[0037] After the treatment is completed, the dust remover is used to clean the first sending tank and the second sending tank.

[0038] By adopting the technical scheme, when a low-temperature propellant (liquid methane, liquid hydrogen) leakage accident occurs on site, the emergency disposal method is: first, emergency plan disposal analysis: quickly determine the on-site situation and make a judgment; second, add water-absorbing resin composite material into the first sending tank and the second sending tank respectively; third, move the system to an appropriate position to ensure the safety of personnel; fourth, connect the water power driving part with an external water source; fifth, adjust the lifting device to an appropriate height; sixth, turn on the fan to direct a large amount of air to the leakage area to forcibly dilute and diffuse the leaked gas to control its concentration below the flammable and explosive limit; seventh, start the water power driving part and the air power driving part to form a gel state water film within 10-20 seconds; eighth, control the first water powder film forming spray part and the second water powder film forming spray part to spray the gel state water film onto the leaked or protected low-temperature fuel storage tank body; and finally, after the treatment is completed, use the dust remover to clean the first sending tank and the second sending tank. In this way, on the one hand, the axial flow induced high-pressure range-increasing air supply technology is used to quickly blow air to the leakage accident source, so that the leaked gas is quickly diluted and diffused below the explosion limit; on the other hand, the gel state water film is sprayed directly to the leaked storage tank body or the surrounding non-leaked (non-flammable) storage tank body, which plays a role in quickly flame-retardant and heat-insulating protection for the target protected storage tank and pipeline system. In this way, the emergency handling capability of the low-temperature chemical fuel leakage of aerospace can be improved, and the secondary disasters such as combustion and explosion caused by leakage can be effectively avoided, thereby providing favorable conditions for subsequent rescue after the accident.

[0039] In summary, the present application includes at least one of the following beneficial technical effects:

[0040] 1. In the present application, for the emergency prevention and control disposal of liquid methane (liquid hydrogen) low-temperature fuel leakage accidents, due to its high chemical stability, it is not easy to implement chemical means such as oxidation decomposition, reduction modification, adsorption solidification, and neutralization reaction, and the prevention and control technical route cannot be copied from other normal temperature chemical leakage accidents. The targeted chemical decontamination disposal must start from the basic law of liquid methane (liquid hydrogen) leakage and diffusion, and focus on solving the following two aspects: first, use high-pressure air supply technology to forcibly send air to the liquid methane (liquid hydrogen) leakage source to forcibly dilute and diffuse the leakage source to control the concentration of the leaked and diffused gas below the flammable and explosive limit; second, spray a gel state water film with flame-retardant and heat-insulating functions to the surface of the protected storage tank to quickly play a flame-retardant and heat-insulating protection role for the target storage tank and pipeline system, effectively avoiding the secondary disasters such as flash evaporation and explosion caused by the high temperature inside the storage tank, and creating favorable conditions for subsequent rescue after the accident;

[0041] 2. The application designs a rotating jet flow coupling water / powder rapid film forming and its spraying system. The water-swellable resin composite (powder) can form a 3-30 mm thick gel state water film within 20 seconds after combining with water, and can be sprayed on the storage tank in a long distance and direction. The water gel film-shaped cover layer is formed on the surface of the tank body, which plays a role of fire-retardant, heat-insulating and cooling protection. The rotating jet flow coupling system integrates rotating flow mixing, fixed ratio delivery, axial flow induction, high pressure air-water / powder anti-clogging technology and other technologies, so that the water / powder raw materials are quickly mixed and reacted at a certain position of the muzzle outlet to generate a stable gel state water film with the required particle size distribution and film thickness.

[0042] 3. The application is provided with an axial flow range increasing fan air supply system. The system uses the air volume and air pressure of the axial flow fan to send large flow of air to the surface of the leaked liquid pool. Through the mechanical turbulent action of air and the heat transfer action of vaporized steam, the temperature of liquid methane (liquid hydrogen) vapor is increased and the density of gas cloud is reduced, which can play a certain lifting effect on the formed deposition cloud, prevent it from accumulating and diffusing along the ground, accelerate its upward dilution and diffusion, thereby reducing the ground gas concentration below the explosion limit, preventing explosion accidents, and ensuring the safety of the disposal personnel. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 is the structure diagram of the space low-temperature chemical fuel leakage mobile emergency disposal system in the application;

[0044] Figure 2 is the front view of the space low-temperature chemical fuel leakage mobile emergency disposal system in the application;

[0045] Figure 3 is the structure diagram of the water / powder rapid film forming device in the application;

[0046] Figure 4 is the top view of the water / powder rapid film forming device in the application after hiding the first water powder film forming spraying element;

[0047] Figure 5 is the flow direction diagram of water flow and gas in the water / powder rapid film forming device in the application;

[0048] Figure 6 is the structure diagram of the air supply assembly in the application;

[0049] Figure 7 is the front view of the air supply assembly in the application;

[0050] Figure 8 is the flow chart of the space low-temperature chemical fuel leakage emergency disposal method in the application.

[0051] Explanation of reference signs: 1, mobile vehicle body; 2, water / powder rapid film forming device; 21, powder conveying assembly; 211, pneumatic driving part; 212, first sending tank; 213, second sending tank; 214, replenishing tank; 215, dust collector; 22, water conveying assembly; 221, hydraulic driving part; 222, first water conveying pipe; 223, second water conveying pipe; 23, first water-powder film forming spray part; 24, second water-powder film forming spray part; 3, air supply assembly; 31, fan; 32, frame; 33, air duct; 331, first air cylinder; 332, second air cylinder; 4, gas conveying pipe; 5, lifting device. DETAILED DESCRIPTION

[0052] The following will be described in detail with reference to the accompanying drawings. Figures 1-8 The application is further described in detail.

[0053] The embodiment of the application discloses a mobile emergency disposal system for space low-temperature chemical fuel leakage and a disposal method thereof. Figure 1 and Figure 2 The mobile emergency disposal system for space low-temperature chemical fuel leakage comprises a mobile vehicle body 1, a water / powder rapid film forming device 2 and an air supply assembly 3, wherein the water / powder rapid film forming device 2 and the air supply assembly 3 are arranged on the mobile vehicle body 1, the water / powder rapid film forming device 2 is used for rapidly generating a gel-state water film with a fire-retardant and heat-insulating function, and the generated gel-state water film can be sprayed on a storage tank body, and the air supply assembly 3 is used for rapidly blowing a large amount of air to a leakage accident source.

[0054] When a low-temperature chemical fuel leakage accident occurs on site, the mobile vehicle body 1 is rapidly moved to the accident site, first, the air supply assembly 3 is used for blowing a large amount of air to the leakage accident source, forcibly diluting and diffusing the leakage source, so that the leakage source volatile gas is rapidly diluted and diffused below the explosion limit, so that the control of the leakage source is realized; then the water / powder rapid film forming device 2 rapidly generates a gel-state water film with a fire-retardant and heat-insulating function and sprays the generated gel-state water film to the leakage storage tank body itself or the surrounding non-leakage (non-combustion) storage tank body, so as to realize the fire-retardant and heat-insulating protection of the storage tank body; in this way, the emergency processing capacity of the space low-temperature chemical fuel leakage is improved, and the accident is controlled in the bud and initial state in time, and the possibility of secondary disasters such as fire and explosion is reduced.

[0055] Specifically, refer to Figure 3 and Figure 4The water / powder fast film-forming device 2 comprises a powder conveying assembly 21, a water conveying assembly 22 and a first water / powder film-forming nozzle 23. The powder conveying assembly 21 is used to blow the water-absorbing resin composite material in powder form into the first water / powder film-forming nozzle 23. The water conveying assembly 22 is used to convey water into the first water / powder film-forming nozzle 23. The gel-state water film is formed by the reaction of the water-absorbing resin composite material (in powder form) and water. The water-absorbing resin composite material has a high water-absorbing function of absorbing several hundred to several thousand times of water than its own weight, and is a new flame-retardant and heat-insulating material effectively unifying the particle size distribution and the absorption rate. Therefore, the powder conveying assembly 21 conveys the water-absorbing resin composite material into the first water / powder film-forming nozzle 23. The water conveying assembly 22 conveys water into the first water / powder film-forming nozzle 23. The two are mixed and reacted in the first water / powder film-forming nozzle 23 to form a gel-state water film, which is directed sprayed on the tank body through the first water / powder film-forming nozzle 23.

[0056] It should be noted that, compared with the traditional fire-fighting water agent, the use of the water / powder fast film-forming device 2 can save more than 90% of water, and the flame-retardant effect is more than 6 times that of the fire-fighting water agent, and the fire extinguishing area is 3-5 times that of the traditional fire extinguishing agent. Tests show that when the surface temperature of the tank reaches 800°C or above, the temperature of the back of the tank covered with the flame-retardant and heat-insulating gel-state water film can be lower than 80°C. The gel-state water film still has 50% of water enclosed in the gel-state network in a 150°C environment, so that the gel-state water film-shaped covering layer has good anti-reburning ability, and the effective action time can be greater than 24h. However, the traditional water fire-fighting cooling needs continuous water spraying, and the anti-reburning ability is poor. Moreover, the gel-state water film is no longer jelly-like, reducing the possibility of blocking the spray outlet and causing the first water / powder film-forming nozzle 23 to be unable to continue to be used.

[0057] Reference Figure 3 and Figure 4, the powder delivery assembly 21 comprises a pneumatic driving member 211 and a first delivery tank 212 for storing the water-absorbing resin composite material, and the pneumatic driving member 211 and the first delivery tank 212 are connected through the gas delivery pipe 4, and the first delivery tank 212 and the first water-powder film-forming spray member 23 are also connected through the gas delivery pipe 4. The water delivery assembly 22 comprises a hydraulic driving member 221 and a first water delivery pipe 222, and the first water-powder film-forming spray member 23 is connected with the hydraulic driving member 221 through the first water delivery pipe 222. When the pneumatic driving member 211 is started, gas is continuously delivered into the gas delivery pipe 4, and under the action of the gas, the water-absorbing resin composite material in the first delivery tank 212 is delivered into the first water-powder film-forming spray member 23 through the gas delivery pipe 4; at the same time, the hydraulic driving member 221 is connected with an external water source (fire hydrant), and water is delivered into the first water-powder film-forming spray member 23 through the first water delivery pipe 222, so that the water-absorbing resin composite material and the water are combined to generate a gel-state water film in the first water-powder film-forming spray member 23, and the film-forming speed is fast. Of course, the water-absorbing resin composite material and the water may have been combined to generate a gel-state water film before entering the first water-powder film-forming spray member 23.

[0058] In particular, with reference to Figure 3 and Figure 4 , the powder delivery assembly 21 further comprises a second delivery tank 213, the water delivery assembly 22 further comprises a second water delivery pipe 223, and the device further comprises a second water-powder film-forming spray member 24, and the pneumatic driving member 211 and the second delivery tank 213 are connected through the gas delivery pipe 4, the second delivery tank 213 and the second water-powder film-forming spray member 24 are also connected through the gas delivery pipe 4, and the second water-powder film-forming spray member 24 and the hydraulic driving member 221 are connected through the second water delivery pipe 223. In this way, the first water-powder film-forming spray member 23 and the second water-powder film-forming spray member 24 can work at the same time, improving the work efficiency; at the same time, the first water-powder film-forming spray member 23 and the second water-powder film-forming spray member 24 can be selected to be different types of spray devices to meet different work requirements, and at the same time, the first water-powder film-forming spray member 23 and the second water-powder film-forming spray member 24 can also work independently, improving the practicability.

[0059] It should be noted that the first water powder film forming spray member 23 and the second water powder film forming spray member 24 can be selected from different types of spray devices, or can be selected from the same type of spray device. In the embodiment, the first water powder film forming spray member 23 and the second water powder film forming spray member 24 are respectively taken as examples of a fire water gun and a fire water cannon. The range of the fire water gun is much smaller than that of the fire water cannon, and the range of the fire water gun is relatively small, which can be used to deal with the emergency situation occurring near the device. Among them, the fire water cannon can adopt an electric control type water cannon, which can realize horizontal rotation, pitch and change of water flow spraying mode, and has 100 meters wireless remote control and operation table manual remote control, that is, remote operation can be realized, and the safety is higher. Of course, the first water powder film forming spray member 23 and the second water powder film forming spray member 24 can also be selected as fire water cannons.

[0060] The pneumatic drive member 211 and the hydraulic drive member 221 can work simultaneously, or the hydraulic drive member 221 can work alone. When the pneumatic drive member 211 and the hydraulic drive member 221 work simultaneously, the first water powder film forming spray member 23 and the second water powder film forming spray member 24 can both spray gel state water film; when the drive member works alone, the first water powder film forming spray member 23 and the second water powder film forming spray member 24 can only spray water to achieve cooling, so that the appropriate way can be selected according to the actual demand, and the multifunctionality of the device is improved.

[0061] Of course, an electric (pneumatic) regulating valve can be installed on the gas conveying pipe 4 between the pneumatic drive member 211 and the first sending tank 212, and on the gas conveying pipe 4 between the pneumatic drive member 211 and the second sending tank 213, to realize the adjustment of gas flow and pressure, so as to control the flow of powder conveying, and realize the fixed ratio of putting. According to the fire situation, the water powder mixing concentration is adjusted in real time, and the extinguishing effect is controlled in the optimal interval. At the same time, the thickness of the gel state water film is adjustable, and the film forming thickness of the gel state water film ranges from 3mm to 30mm. In this way, the appropriate thickness of the gel state water film can be determined according to the actual situation, so as to achieve the purpose of energy saving. At the same time, the gel state water film is generated quickly, and the gel state water film can be generated and sprayed out through the first water powder film forming spray member 23 or the second water powder film forming spray member 24 in 10s-20s.

[0062] Referring to Figure 4 and Figure 5It is to be noted that the air pipe 4 between the air driving member 211 and the second sending tank 213 is communicated with the air pipe 4 between the air driving member 211 and the first sending tank 212, and the air pipe 4 between the second sending tank 213 and the second water powder film forming spray member 24 is communicated with the air pipe 4 between the first sending tank 212 and the first water powder film forming spray member 23, and each air pipe 4 is provided with an air inlet valve (not shown in the figure). In this way, each air pipe 4 can be arranged in a ring shape and can make the gas flow stably in the air pipe 4 through the cooperation of the air inlet valve, and the water-absorbing resin composite material and the gas can be uniformly mixed, so that the water-absorbing resin composite material is stably transported in the air pipe 4 in a flow state.

[0063] With reference to Figure 3 and Figure 4 , the powder conveying assembly 21 further comprises a replenishing tank 214, which is connected with the air driving member 211, the first sending tank 212 and the second sending tank 213 through the air pipe 4. When the air driving member 211 is started, the air in the air pipe 4 can transport the water-absorbing resin composite material in the replenishing tank 214 to the first sending tank 212 and the second sending tank 213 respectively, so as to realize the replenishment of the water-absorbing resin composite material in the first sending tank 212 and the second sending tank 213. Of course, the first sending tank 212, the second sending tank 213 and the replenishing tank 214 are all provided with a feeding port, and the water-absorbing resin composite material can be added to the first sending tank 212, the second sending tank 213 and the replenishing tank 214 through the feeding port.

[0064] With reference to Figure 3 and Figure 4 , the powder conveying assembly 21 further comprises a dust collector 215, which is connected with the replenishing tank 214, the first sending tank 212 and the second sending tank 213 through the air pipe 4. When the emergency treatment is completed, the sending tanks need to be treated, that is, the gas in the first sending tank 212 and the second sending tank 213 is discharged to realize pressure relief, at this time, the dust collector 215 is opened, the gas in the first sending tank 212 and the second sending tank 213 is discharged through the dust collector 215, and the water-absorbing resin composite material remaining in the first sending tank 212 and the second sending tank 213 is collected and recycled in the replenishing tank 214.

[0065] It should be noted that the pneumatic drive 211 is preferably a component that can generate high-pressure gas, preferably an air compressor, which generates gas with stronger driving force and reduces the likelihood of blockage. The hydraulic drive 221 is preferably a water pump, which can achieve rotational mixing, i.e. rotational motion of the jet when the liquid is injected, which makes the water flow expand more quickly, the entrainment stronger, and the flow field decay faster, enabling the water-absorbing resin composite and water to be mixed uniformly and react at a certain position of the injection outlet to generate a gelatinous water film with the desired particle size distribution and film thickness.

[0066] Specifically, referring to Figure 6 and Figure 7 , the air supply assembly 3 includes a fan 31, a frame 32, and an air duct 33. The fan 31 is installed on the frame 32, and one end of the air duct 33 is connected to the frame 32 with the air direction consistent with the axis of the air duct 33. In use, a large amount of air is delivered to the vicinity of the leaking tank body by the air volume and air pressure of the fan 31, which increases the temperature of the liquid methane (liquid hydrogen) vapor and reduces the density of the gas cloud through the mechanical turbulent flow of air and the heat transfer of vaporized steam. This can lift the formed deposition cloud to a certain extent, prevent it from accumulating and spreading along the ground, and accelerate its upward dilution and diffusion, thereby reducing the ground gas concentration to below the explosion limit and preventing explosion accidents, while ensuring the safety of the disposal personnel.

[0067] It should be noted that the air supply assembly 3 can be provided with multiple units. The fan can be a high-speed range-increasing axial induction fan. In this embodiment, taking the maximum leakage speed of a certain liquid liquid methane tank as an example, the total vaporization volume of the liquid methane (liquid hydrogen) is 60,000 m 3 / min for a cumulative leakage time of 5 min. According to the 5% concentration explosion limit, the amount of external dilution air required is about 109,000 cubic meters. In this embodiment, taking two sets of air supply assemblies 3 with a total exhaust volume of 2x140,000 m³ / h as an example, the air supply system can meet the needs of liquid methane (liquid hydrogen) leakage accident disposal within 20.5 min of normal operation.

[0068] Referring to Figure 6 and Figure 7 , the air duct 33 includes a first air cylinder 331 and a second air cylinder 332. The second air cylinder 332 is located between the first air cylinder 331 and the frame 32, and the first air cylinder 331 is conical. The conical first air cylinder 331 can constrain the motion trajectory of the airflow, increase the speed of the airflow in the horizontal direction, effectively constrain the air volume, and reduce energy loss.

[0069] Referring to Figure 6 and Figure 7The first air duct 331 and the second air duct 332 are coaxially arranged, and the first air duct 331 is in a cylindrical shape. The coaxial cylindrical second air duct 332 can make the air flow velocity in the air duct 33 be distributed in a stepped gradient (high outside and low inside), and constrain the movement track of air.

[0070] With reference to Figure 1 And Figure 6 When a liquid methane leakage accident occurs, it is necessary to timely and quickly blow air to the leakage accident source, so that the leakage gas is quickly diluted and diffused to the lower limit of the leakage gas explosion limit. In order to achieve the purpose of quickly dispersing the leakage gas, the fan 31 is suitable to inject a large amount of air in a swooping manner to the target leakage source. Therefore, the application also provides a lifting device 5, which can lift the air supply assembly 3 to any height to meet the working requirements.

[0071] It should be noted that the lifting device 5 is a lifting mechanism, and the lifting device 5 can adopt a ladder, a telescopic arm, etc. In the embodiment, the lifting device 5 is not limited.

[0072] Of course, in addition to the conventional car body, car head, car body, wheels, frames, driving systems and chassis bearing system structures, the car body also includes electrical and control systems, electric control disposal systems and other emergency processing related instruments and equipment. Under the premise of ensuring safety and stability, it also has the ability of automatic control and remote control, provides guarantee for various automatic operations, realizes unmanned operation, and ensures the safety of personnel. In the embodiment, the electrical control system adopts an intelligent safety control system of PLC control plus CAN bus. The entire disposal system is designed with only one control terminal, and the key functions of the key systems such as water powder film forming, axial flow air supply, lifting and delivery can be displayed on the control terminal interface and can be remotely controlled. Of course, the driving system can be driven by multiple engines to achieve high efficiency.

[0073] The car body is also provided with various warning lights, indicator lights and illumination lights, etc. so as to work in various environments. The siren can be integrated in the cab and has multiple functions such as fire alarm sound, siren sound, external shouting, etc. Of course, the car body structure, siren and electrical control system, etc. are all structures or technologies known to those skilled in the art, and in the embodiment, they will not be described in detail.

[0074] The implementation principle of the space low-temperature chemical fuel leakage mobile emergency disposal system provided in the embodiments of the present application is as follows: when a low-temperature chemical fuel leakage accident occurs on site, the device can be quickly moved to a safe distance from the leakage source. On the one hand, the lifting device 5 lifts the fan 31 to an appropriate height (15 m from the ground), and the fan 31 quickly blows air to the leakage accident source, so that the volatile gas of the leakage source is quickly diluted and diffused below the explosion limit. On the other hand, the water-absorbing resin composite material is combined with water to form a gel state water film by using the pneumatic driving part 211 and the hydraulic driving part 221, and then the generated gel state water film is directionally sprayed to the leakage tank body itself or the surrounding non-leakage (non-combustion) tank body, so as to quickly play a fire-retardant and heat-insulating protection role for the target protection tank and pipeline system. In this way, the emergency processing capacity of the space low-temperature chemical fuel leakage can be improved, the accident can be controlled in the initial state in time, the secondary disasters such as combustion and explosion caused by leakage can be effectively avoided, and favorable conditions for subsequent rescue are provided.

[0075] The embodiments of the present application also disclose a space low-temperature chemical fuel leakage emergency disposal method. Figure 8 The space chemical fuel leakage emergency disposal method comprises the following steps:

[0076] S1, emergency plan disposal analysis;

[0077] The on-site situation is analyzed, the leakage source is determined, the amount of leakage gas is estimated, it is judged whether combustion, explosion and other secondary accidents are easy to be caused, the staff are prepared for safety protection and are in a standby state.

[0078] S2, water-absorbing resin composite material is added into the first sending tank 212 and the second sending tank 213 respectively;

[0079] The equipment debugging work is done, the output flow and pressure of the gas are determined, the water-powder mixing concentration is adjusted in real time according to the fire situation, and the fire extinguishing effect is controlled in the optimal interval.

[0080] S3, the system is moved to a proper position;

[0081] The device is moved to a safe area 80 m-100 m away from the leakage source, and the safe area should be located in the upwind direction.

[0082] S4, the hydraulic driving part 221 is connected with an external water source;

[0083] S5, the lifting device 5 is adjusted to an appropriate height;

[0084] S6, the fan 31 is turned on to directionally transport a large amount of air to the leakage area, and the leakage gas is forced to be diluted and diffused to control its concentration below the flammable and explosive limit;

[0085] S7, start the water driving part 221 and the air driving part 211, and form the gel water film within 10s-20s;

[0086] According to the work requirement, open the valve on the corresponding gas pipe 4, and open the valve on the first water pipe 222 and the second water pipe 223, so that the water-absorbing resin composite and water can be combined and reacted in the first water powder film forming nozzle 23 or the second water powder film forming nozzle 24 within 10s-20s to form the gel water film.

[0087] S8, control the first water powder film forming nozzle 23 and the second water powder film forming nozzle 24 to spray the gel water film on the leaking or protected low-temperature fuel storage tank;

[0088] The control of the first water powder film forming nozzle 23 and the second water powder film forming nozzle 24 can be remote control, that is, the staff uses wireless devices to control the spray angle of the first water powder film forming nozzle 23 and the second water powder film forming nozzle 24 in the safe area.

[0089] It should be noted that the order of steps five to eight can be adjusted: first adjust the lifting device 5 to the appropriate height, then open the fan 31 to transport a large amount of air to the leakage area, then start the water driving part 221 and the air driving part 211 to form the gel water film, and finally control the first water powder film forming nozzle 23 and the second water powder film forming nozzle 24 to spray the gel water film on the leaking tank. Of course, steps five and seven can also be performed simultaneously. Since generally the leakage source needs to be controlled first, therefore, the order of steps five to eight in this embodiment is preferred.

[0090] S9, use the dust collector 215 to clean the first sending tank 212 and the second sending tank 213.

[0091] Open the dust collector 215, and the gas in the first sending tank 212 and the second sending tank 213 is discharged through the dust collector 215, while the water-absorbing resin composite remaining in the first sending tank 212 and the second sending tank 213 is collected and recycled in the supply tank 214.

[0092] The implementation principle of the space low-temperature chemical fuel leakage emergency disposal method of the embodiment of the application is as follows: when a low-temperature propellant (liquid methane, liquid hydrogen) leakage accident occurs on site, the emergency disposal method is as follows: first, emergency plan disposal analysis: quickly determine the on-site situation and make a judgment; second, add water-absorbing resin composite material into the first sending tank 212 and the second sending tank 213 respectively; third, move the system to the appropriate position to ensure the safety of personnel; fourth, connect the water power driving part 221 with the external water source; fifth, adjust the lifting device 5 to the appropriate height; sixth, open the fan 31, and directionally transport a large amount of air to the leakage area to forcibly dilute and diffuse the leaked gas to control its concentration below the flammable and explosive limit; seventh, start the water power driving part 221 and the air power driving part 211, and form a gel state water film within 10s-20s; eighth, control the first water powder film forming spraying part 23 and the second water powder film forming spraying part 24 to spray the gel state water film onto the leakage or protected low-temperature fuel storage tank body; finally, after the treatment is completed, use the dust remover 215 to clean the first sending tank 212 and the second sending tank 213. In this way, on the one hand, the axial flow induced high-pressure range-increasing air supply technology is used to quickly blow air to the leakage accident source, so that the leaked gas is quickly diluted and diffused below the explosion limit; on the other hand, the gel state water film is directionally sprayed onto the leakage tank body itself or the surrounding non-leakage (non-combustion) tank body, which plays a role in quickly flame-retardant and heat-insulating protection for the target protected tank and pipeline system. In this way, the emergency handling capacity of the space low-temperature chemical fuel leakage can be improved, and the accident can be controlled in the bud and initial state in time, so that the secondary disasters such as combustion and explosion caused by leakage can be effectively avoided, and favorable conditions for subsequent rescue are provided.

[0093] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A mobile emergency response system for space launch cryogenic chemical fuel leaks, characterized by: The powder conveying assembly (21), the water conveying assembly (22) and the first water-powder film-forming spray component (23) are included. The powder conveying assembly (21) is used for blowing the powdered water-absorbing resin composite into the first water-powder film-forming spray component (23), and the powder conveying assembly (21) includes a pneumatic driving element (211) and a first sending tank (212) used for storing the water-absorbing resin composite, and the pneumatic driving element (211) and the first sending tank (212) and the first sending tank (212) and the first water-powder film-forming spray component (23) are communicated through a gas conveying pipe (4). The water conveying assembly (22) includes a hydraulic driving element (221) and a first water conveying pipe (222), and the first water-powder film-forming spray component (23) is communicated with the hydraulic driving element (221) through the first water conveying pipe (222). The water-absorbing resin composite can quickly form a gel-state water film with fire-retardant and heat-insulating functions in combination with water, and the water-absorbing resin composite and water are combined and reacted in the first water-powder film-forming spray component (23) to generate the gel-state water film. An electric or pneumatic regulating valve is installed on the gas conveying pipe (4) between the pneumatic driving element (211) and the first sending tank (212) to realize the regulation of the gas flow and pressure, so as to control the flow of the powder conveying, realize the constant-ratio delivery, adjust the water-powder mixing concentration in real time according to the fire scene situation, control the extinguishing effect in the optimal interval, and at the same time, make the thickness of the gel-state water film adjustable, and the film-forming thickness of the gel-state water film ranges from 3 mm to 30 mm, so that the appropriate thickness of the gel-state water film can be determined according to the actual situation to realize the energy-saving purpose, and at the same time, the gel-state water film is generated quickly, and the gel-state water film can be generated and sprayed out through the first water-powder film-forming spray component (23) within 10-20 seconds. The air conveying assembly (3) for conveying air is further included, and the air conveying assembly (3) includes a fan (31), a frame (32) and an air duct (33), the fan (31) is installed on the frame (32), and one end of the air duct (33) is connected to the frame (32) and the air direction is consistent with the axis of the air duct (33).

2. The space low temperature chemical fuel leak mobile emergency response system of claim 1, wherein: The second water-powder film-forming spray component (24) is further included, the powder conveying assembly (21) further includes a second sending tank (213), the water conveying assembly (22) further includes a second water conveying pipe (223), the pneumatic driving element (211) and the second sending tank (213) and the second sending tank (213) and the second water-powder film-forming spray component (24) are communicated through the gas conveying pipe (4), and the second water-powder film-forming spray component (24) and the hydraulic driving element (221) are communicated through the second water conveying pipe (223).

3. The space low temperature chemical fuel leak mobile emergency response system of claim 2, wherein: The powder feeding assembly (21) further comprises a dust collector (215) and a replenishing tank (214), which are communicated through air pipes (4).

4. The space low temperature chemical fuel leak mobile emergency response system of claim 3, wherein: The air pipe (4) between the air driving member (211) and the second sending tank (213) is communicated with the air pipe (4) between the air driving member (211) and the first sending tank (212), and the air pipe (4) between the second sending tank (213) and the second water powder film forming spraying member (24) is communicated with the air pipe (4) between the first sending tank (212) and the first water powder film forming spraying member (23), and each air pipe (4) is provided with an air inlet valve.

5. The space cryogenic chemical fuel leak mobile emergency response system of claim 1, wherein: The air duct (33) comprises a first air duct (331) and a second air duct (332), and the second air duct (332) is located between the first air duct (331) and the frame (32), and the first air duct (331) is conical.

6. The space cryogenic chemical fuel leak mobile emergency response system of claim 5, wherein: The first air duct (331) and the second air duct (332) are coaxially arranged, and the first air duct (331) is cylindrical.

7. The space cryogenic chemical fuel leak mobile emergency response system of claim 1, wherein: Further comprising a lifting device (5) capable of changing the height of the air feeding assembly (3).

8. A method for emergency disposal of space chemical fuel leakage, using the mobile emergency disposal system for space low-temperature chemical fuel leakage according to any one of claims 1-7. The steps include: Emergency plan disposal analysis; Resin composite material is added into the first sending tank (212) and the second sending tank (213) respectively; The system is moved to the appropriate position; The hydraulic driving member (221) is connected with an external water source; The lifting device (5) is adjusted to the appropriate height; The fan (31) is turned on to direct a large amount of air to the leakage area to forcibly dilute and diffuse the leaked gas to control its concentration below the flammable and explosive limit; The hydraulic driving member (221) and the air driving member (211) are started to form a gel state water film within 20s; The first water powder film forming spraying member (23) and the second water powder film forming spraying member (24) are controlled to spray the gel state water film onto the leaked or protected low temperature fuel storage tank; After the treatment is completed, the first sending tank (212) and the second sending tank (213) are cleaned using the dust collector (215).

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