Emergency compression pump pry system for liquefied gas

Abstract

This utility model discloses a liquefied petroleum gas (LPG) emergency compression pump skid system, including a power skid frame, a hydrocarbon pump, a compressor, and a control unit. The hydrocarbon pump and compressor are independently mounted on the power skid frame and connected to tank trucks or storage tanks via check valves, shut-off valves, and quick-connect couplings, respectively performing liquid phase transfer and gas phase compression operations. The control unit is equipped with power control, operation monitoring, and alarm functions, improving on-site safety and deployment efficiency. This system is compact, easy to control, and highly efficient in connection, making it suitable for pumping, transferring, and discharging operations of liquefied petroleum gas and other hazardous chemicals in emergency scenarios.

Description

Technical Field

[0001] This application relates to the field of liquefied gas power skid technology, and specifically to a liquefied gas emergency compression pump skid system. Background Technology

[0002] Liquefied gases, as important hazardous chemicals, are widely used in many fields such as petroleum, chemical, energy, gas, and emergency rescue. During transportation, storage, loading and unloading, and emergency handling, liquefied gases are highly susceptible to major safety accidents such as leaks, volatilization, and explosions due to improper operation or equipment failure. Therefore, the efficient, safe, and reliable transfer and compression of liquefied gases has become a crucial aspect of emergency rescue and industrial safety management.

[0003] In existing hazardous chemical emergency response scenarios, the on-site transfer and disposal of liquefied gases often relies on mobile hydrocarbon pumps, compressors, and other power equipment. These devices generally suffer from the following technical problems:

[0004] First, traditional liquefied gas hydrocarbon pumps and compressors are large and complex in structure, making them difficult to transport, deploy, and install quickly at accident sites with limited space and complex operating environments, thus affecting emergency response efficiency. Taking actual emergency rescue cases in Nantong City and other chemical industry clusters as examples, conventional power equipment, due to its weight and size, is often difficult to deliver to the accident site and put into use in a timely manner, resulting in liquefied gas leaks not being controlled promptly and effectively, posing significant safety hazards.

[0005] Secondly, traditional equipment generally uses ordinary steel and conventional frame structures, lacking high-strength, lightweight skids specifically designed for hazardous chemical environments. This leads to structural deformation, instability, and difficulty in sustained high-load operation when working in the field or high-risk areas. This not only affects the rescue progress but also poses risks such as secondary equipment damage and additional safety hazards.

[0006] Furthermore, existing liquefied gas hydrocarbon pumps mostly employ traditional straight impellers or simple centrifugal structures, while compressors primarily use single-stage compression, resulting in low overall efficiency in transporting and compressing liquefied gases. Due to the physical characteristics of liquefied gases (low temperature, high volatility, easy leakage, etc.), the equipment is prone to problems such as insufficient flow, inadequate head, and excessive energy consumption, making it difficult to meet emergency needs under conditions of large-scale accidents or continuous operation.

[0007] In terms of safety, liquefied gases themselves pose extremely high flammability and explosiveness risks. Many on-site power equipment lacks specific static electricity elimination and leak prevention measures, making it highly susceptible to static electricity buildup during operation, particularly during friction, pumping, and compression. Combined with rudimentary sealing structures and poor corrosion resistance and low-temperature performance of materials, this greatly increases the risk of serious safety accidents such as gas leaks and explosions. In recent years, investigations into numerous liquefied gas leaks and explosions in China have consistently found that static electricity in equipment and seal failure are significant contributing factors.

[0008] Furthermore, traditional equipment has a low level of automation and intelligence. Many mobile liquefied gas processing equipment rely solely on manual operation and monitoring, lacking comprehensive operational parameter monitoring, abnormal alarm, and remote control functions. On-site personnel cannot monitor the equipment's operating status in real time, nor can they respond promptly to abnormal parameters, increasing the risk of operational errors and safety accidents.

[0009] In terms of portability and operability, most conventional power skid equipment does not take into account emergency deployment and ease of operation. On-site personnel need to spend a lot of time and effort to complete the connection, debugging and startup of the equipment in confined spaces and complex working conditions, making it difficult to complete the transfer and control of liquefied gas within the golden rescue window.

[0010] In summary, existing liquefied gas compressor power equipment generally suffers from prominent problems in the field of emergency rescue, such as large size, bulky structure, low efficiency, lack of targeted safety protection, low level of automation and intelligence, and poor portability. There is an urgent need for new technical solutions that optimize structure, improve efficiency, enhance safety, and achieve intelligent control for emergency rescue scenarios involving hazardous chemicals. Utility Model Content

[0011] To achieve the above objectives, this application proposes a liquefied gas emergency compression pump skid system, including a power skid frame, a liquid phase unit, a gas phase unit, and a control unit. The liquid phase unit includes a liquid phase inlet pipe, a hydrocarbon pump, and a liquid phase outlet pipe. A shut-off valve, a check valve, and a quick connector are provided between the liquid phase inlet and outlet pipes. The liquid phase outlet pipe has multiple branch passages for connecting different storage tanks or tank trucks. The gas phase unit includes a gas phase inlet pipe, a compressor, and an exhaust pipe. A shut-off valve, a check valve, and a quick connector are provided on the gas phase pipe. The compressor exhaust pipe may be equipped with a series check valve. The gas phase and liquid phase pipes are connected by quick-connect or flange connection. The hydrocarbon pump and compressor are independently installed within the power skid frame. The hydrocarbon pump is located at the lower part of the power skid frame, and the compressor is located at the upper part of the frame. A drain port is provided at the bottom of the power skid frame. The hydrocarbon pump and compressor are connected to the tank truck or storage tank via flexible hoses. The control unit is located on the frame and is electrically connected to the hydrocarbon pump and compressor.

[0012] In one embodiment, the liquid phase outlet pipe has two branches, which can be connected to different storage tanks or tank trucks simultaneously.

[0013] In one embodiment, the hydrocarbon pump is disposed at the lower part of the frame, and the compressor is disposed at the upper part of the frame.

[0014] In one embodiment, the compressor exhaust pipe is provided with two check valves connected in series.

[0015] In one embodiment, the inlet and outlet pipes of the hydrocarbon pump are equipped with pressure relief valves with an interface specification of 1 / 2 inch.

[0016] In one embodiment, the control unit includes a power distribution box.

[0017] In one embodiment, the power supply lines of the hydrocarbon pump and the compressor are connected via a distribution box, which is equipped with a main power switch and a power indicator device.

[0018] In one embodiment, the cables for the hydrocarbon pump and the compressor are laid separately and isolated by cable trays.

[0019] In one embodiment, the hydrocarbon pump and compressor mounting locations are provided with vibration damping structures.

[0020] The liquefied gas emergency compression pump skid system provided by this utility model has significant technological advancements and practical application value, specifically reflected in the following aspects:

[0021] Firstly, in terms of structural integration and modular design, this system achieves coordinated operation of the liquid and gas phase systems by uniformly installing the hydrocarbon pump and compressor within an integrated skid-mounted platform. The hydrocarbon pump is responsible for the pumping and transfer of liquefied gas, while the compressor is used to pump the gas phase at the top of the storage tank to maintain pressure balance, thus forming a closed-loop system and significantly improving tank transfer efficiency. The skid-mounted structure adopts a standardized design, possessing excellent versatility, portability, and rapid on-site deployment capabilities, making it suitable for various emergency rescue or sudden operational situations.

[0022] Secondly, regarding fluid safety control, this invention incorporates multiple sets of shut-off valves, check valves, pressure gauges, and quick-connect interfaces to ensure unidirectional operation of the liquid and gas phase channels, prevent backflow, and provide rapid pressure relief response. In particular, the liquid phase outlet features a dual-channel parallel structure, allowing simultaneous connection of two tank trucks or storage tanks for synchronous tank transfer or rotation operations, effectively improving emergency response efficiency and providing greater scheduling flexibility. The gas phase exhaust channel also employs a dual check valve series structure, preventing back pressure and backflush while enhancing pipeline sealing reliability.

[0023] Furthermore, regarding the control system and intelligent monitoring, this system is equipped with an independent power distribution box and control module, featuring functions such as power distribution, pump start / stop control, status indication, and alarm feedback. The control panel integrates multiple function keys and indicator lights for pump start, compressor start, high-pressure alarm, over-temperature alarm, and emergency stop, facilitating real-time monitoring of equipment operation by on-site operators. The electrical components and signal system utilize cable trays with separate power and signal lines, effectively preventing electromagnetic interference and ensuring system stability and timely response.

[0024] Fourth, regarding the universality of components and ease of maintenance, all connecting parts of this utility model adopt standard quick-connect couplings, flange structures, and unified interface specifications, which improves the efficiency of pipeline disassembly and on-site connection while meeting sealing and pressure resistance requirements. Both the hydrocarbon pump and compressor body structures have pre-reserved interfaces such as inspection ports, maintenance ports, and pressure test ports, which facilitates rapid maintenance, condition monitoring, and component replacement during subsequent operation, reducing maintenance cycles and operating costs.

[0025] In summary, this utility model, through structural integration, pipeline optimization, safety control, and intelligent monitoring, forms a highly efficient, safe, and flexible skid-mounted operation system suitable for liquefied gas emergency response scenarios. This system combines practicality, economy, and engineering feasibility, and is particularly suitable for complex operational scenarios such as hazardous chemical emergency response, tanker accident transfer, and tank cleaning and evacuation, demonstrating broad application prospects. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a plan view of the power skid of the liquefied gas emergency compression pump skid system of this utility model;

[0029] Figure 2 This is a typical connection structure diagram of the LPG compressor in the pump skid system of this utility model;

[0030] Figure 3 This is a connection structure diagram of the LPG hydrocarbon pump in the pump skid system of this utility model;

[0031] Figure 4 This is a schematic diagram illustrating the application scenario of the liquefied gas hydrocarbon pump and compressor power skid of this application.

[0032] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0033] The components represented by the symbols in the attached diagram are as follows:

[0034] 1 Compressor, 2 Shut-off valve, 3 Check valve, 4 Shut-off valve, 5 Quick-connect coupling, 6 Pressure gauge, 7 Hydrocarbon pump, 8 Check valve, 9 Shut-off valve, 10 Pressure gauge, 11 Distribution box, 12 Power skid frame, 13 Compressor module, 14 Shut-off valve, 15 Shut-off valve, 16 Check valve, 17 Hydrocarbon pump module, 18 Check valve, 19 Shut-off valve. Detailed Implementation

[0035] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0036] To further facilitate understanding of the application of this utility model, the following supplementary explanations of the three embodiments are provided in conjunction with specific implementation scenarios, respectively demonstrating the application details and implementation logic of the technical solution of this utility model in different deployment environments.

[0037] like Figure 1 , 2 As shown in Figures 3 and 4, this application provides a liquefied gas emergency compression pump skid system for rapid transfer, compression, and transportation of liquefied gas in emergency scenarios such as hazardous chemical storage tank leaks, valve failures, and emptying of transport tankers. The system adopts an integrated skid-mounted structure, integrating the hydrocarbon pump, compressor, its pipelines, and control unit within the same power skid frame, offering advantages such as compact layout, rapid deployment, and high safety.

[0038] The liquefied gas emergency compression pump skid system involved in this embodiment mainly includes a compressor 1, a hydrocarbon pump 7, and a power distribution box 11 installed on the power skid frame 12, as well as process pipelines, valves, pressure gauges and quick-connect couplings connected thereto. The system has a compact structure and high integration, making it easy to deploy at the emergency rescue site for hazardous chemicals, and is used to realize the transfer, transfer and depressurization of liquefied gas.

[0039] like Figure 1 As shown, the power skid frame 12 adopts an integrated welded structure made of high-strength alloy steel, possessing impact resistance and corrosion resistance. Forklift holes and lifting holes are provided at the bottom of the frame for easy and rapid handling and positioning in emergency situations. The compressor 1 is located on the upper part of the frame and connected to the pipeline via a flange. Its inlet end is equipped with a shut-off valve 2 and a check valve 3 to control the flow of gaseous fluid into the compressor 1; the exhaust end is connected to a shut-off valve 4, a quick-connect fitting 5, and a pressure gauge 6. The quick-connect fitting 5 is used to connect to an external tank truck or exhaust pipeline, and the pressure gauge 6 is used to monitor the pressure status at the exhaust end in real time.

[0040] The connection structure of compressor module 13 is as follows: Figure 2As shown, the intake passage of compressor 1 forms a gas introduction path through shut-off valve 15 and check valve 16, and the exhaust end is connected to shut-off valve 14. Finally, it is connected to an external system via a quick-connect connection to realize gas phase suction or discharge operations. The module adopts a closed-loop arrangement structure to form a symmetrical flow path, which can perform conventional compression operations as well as bypass pressure relief, meeting various gas handling needs in emergency situations. The bottom of compressor 1 is equipped with a vibration damping pad to effectively buffer the mechanical vibration generated during operation. A leakage hole can be provided at the bottom to collect condensate or leaks generated during operation to prevent environmental pollution.

[0041] Hydrocarbon pump 7 is installed on the lower part of the power skid frame 12 and is used to pump liquid hydrocarbons from tank trucks or storage tanks, forming a liquid phase transfer path. The inlet end of hydrocarbon pump 7 is connected to check valve 8 and shut-off valve 9, and the outlet end is connected to pressure gauge 10. Check valve 8 is used to prevent backflow, shut-off valve 9 is used to control opening and closing, and pressure gauge 10 is used to monitor the pump outlet pressure. Figure 1 As shown.

[0042] like Figure 3 As shown, the hydrocarbon pump module 17 is further provided with two parallel outlet channels. The outlet of the hydrocarbon pump module 17 (hydrocarbon pump 7) is split into two branches after passing through the check valve 18. Each branch is equipped with a shut-off valve 19 and a quick-connect coupling, which are used to connect two tank trucks simultaneously or selectively transport liquid through a single channel. This parallel structure can realize batch operation, simultaneous liquid supply, or mutual backup channels, and has good redundancy capability.

[0043] The electrical control of the entire system is centralized in distribution box 11, which integrates control buttons, power protection devices, contactors, circuit breakers, and alarm modules. The operation panel of distribution box 11 is equipped with function buttons and status indicator lights for "Liquid Pump Start," "Compressor Start," "Emergency Stop," "High Pressure Alarm," and "Over-Temperature Alarm," providing basic manual control functions. The power supply adopts an AC380V three-phase system, with power lines and signal lines separately routed through cable trays to avoid power frequency interference and enhance system stability.

[0044] In actual use, the operator first connects the liquid phase channel and the gas phase channel to the target tank or tank truck using quick-connect couplings. The liquid phase inlet uses a DN50 interface, and the gas phase uses a DN25 interface, achieving quick tool-free installation using clamps. After powering on, the operator sequentially starts the hydrocarbon pump 7 and compressor 1 on the distribution box 11 to begin pumping liquid and simultaneously pumping gas. During system operation, pressure gauges 10 and 6 are used to observe whether the operating pressure is within the set range. If the high-pressure set value is reached, the system will trigger an alarm, activating the deceleration or stop device via the control module to ensure operational safety.

[0045] All connecting pipes within the entire pump skid system are made of stainless steel, and the connections are made using flanges combined with quick-connect fittings to ensure high-pressure sealing performance and rapid assembly / disassembly. Key nodes utilize a combination of rigid metal pipes and flexible joints, ensuring not only pressure resistance but also excellent shock absorption performance. All signal acquisition devices, such as pressure gauges 6 and 10, support remote sampling and can output standard 4–20mA signals for acquisition by the backend PLC or monitoring platform, enabling remote control and monitoring.

[0046] The skid's bottom directs the low-level drain port, vent, and pressure relief channel to the same collection point, preventing residual liquefied gas leaks from polluting the environment. The drain interface is equipped with a standard connector for connecting to external collection or absorption devices for centralized discharge.

[0047] The compressor 1 in this system has a multi-stage series structure with multiple compression chambers. Each chamber includes a compression rotor, stator, and sealing components. The chamber shells are manufactured using welding or integral casting processes, and the inner surfaces are coated with an anti-corrosion coating. Overpressure relief valves and safety discharge ports are installed between the compression chambers to automatically release pressure in case of abnormal system pressure increases, ensuring the safety of the compressor itself. Compressor 1 is connected to the skid via a high-rigidity base, and a vibration-damping layer is provided at the connection point to absorb operating loads.

[0048] The hydrocarbon pump 7 features a low-speed, high-head design. Its internal impeller is made of corrosion-resistant metal, and the bearing structure consists of double-sided rolling or sliding bearings. The bearing housing integrates a lubrication structure, ensuring long-term operational stability and service life. The hydrocarbon pump 7's casing is equipped with an inspection port and a pressure relief port for easy routine maintenance and system depressurization under abnormal conditions.

[0049] After the equipment is fully installed, users can install it using the pre-drilled anchor holes on the skid, or place the skid on a high-level work platform using the hoisting holes, depending on the working environment. During system operation, compressor 1 and hydrocarbon pump 7 should be regularly maintained and inspected, including monitoring pressure values, motor temperature rise, operating vibration amplitude, presence of leaks, valve opening and closing status, and other parameters. If necessary, pipeline cleaning and seal replacement should be performed to ensure long-term stable operation of the equipment.

[0050] In summary, this utility model, through the tight integration of components such as compressor 1, hydrocarbon pump 7, electrical distribution box 11, and power skid frame 12, and in conjunction with a reasonable pipeline layout and signal control system, achieves safe and efficient handling of liquefied gas emergencies. It is particularly suitable for on-site emergency operations in chemical, petrochemical, fire protection, hazardous chemical transportation, and sudden leak accidents. The system possesses advantages such as compact structure, clear modules, convenient operation, and sufficient redundancy, demonstrating good engineering practicality and promising prospects for widespread application.

[0051] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A liquefied gas emergency compression pump skid system, comprising: The power skid frame, liquid phase unit, gas phase unit, and control unit are characterized in that: The liquid phase unit includes a liquid phase inlet pipe, a hydrocarbon pump and a liquid phase outlet pipe. A shut-off valve, a check valve and a quick connector are provided between the liquid phase inlet and outlet pipes. The liquid phase outlet pipe has multiple branch passages for connecting different storage tanks or tank trucks. The gas phase unit includes a gas phase inlet pipe, a compressor and an outlet pipe. The gas phase pipe is equipped with a shut-off valve, a check valve and a quick connector. The compressor outlet pipe may be equipped with a series check valve. The gas phase and liquid phase pipes are connected by quick-connect or flange connection. The hydrocarbon pump and compressor are respectively installed at different positions within the power skid frame. The hydrocarbon pump is located at the lower part of the power skid frame, and the compressor is located at the upper part of the power skid frame. A drain port is provided at the bottom of the power skid frame. The hydrocarbon pump and compressor are connected to a tank truck or storage tank via flexible hoses. The control unit is mounted on the frame and is electrically connected to the hydrocarbon pump and compressor.

2. The system according to claim 1, characterized in that, The liquid phase outlet pipe has two branches, which can be connected to different storage tanks or tank trucks at the same time.

3. The system according to claim 1, characterized in that, The compressor exhaust pipe is equipped with two check valves connected in series.

4. The system according to claim 1, characterized in that, The inlet and outlet pipes of the hydrocarbon pump are equipped with pressure relief valves with an interface specification of 1 / 2 inch.

5. The system according to claim 1, characterized in that, The control unit includes a power distribution box.

6. The system according to claim 5, characterized in that, The power supply lines for the hydrocarbon pump and the compressor are connected via a distribution box, which is equipped with a main power switch and a power indicator.

7. The system according to claim 1, characterized in that, The cables for the hydrocarbon pump and the compressor are laid separately.

8. The system according to claim 1, characterized in that, The hydrocarbon pump and compressor mounting locations are equipped with vibration damping structures.

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