Automatic propylene pressurization skid-mounted system

Abstract

The invention relates to the technical field of chemical tanks, in particular to an automatic propylene pressurization skid-mounted system. According to the system, efficient pressurization and stable conveying of a propylene medium are achieved through cooperative operation of the double-parallel-connection pressurization loop, the circulating voltage stabilization module, the driving module and the DCS. The redundancy architecture of the DCS guarantees the control stability, the full-life-cycle management system of the circulating voltage stabilization module improves the equipment reliability, all the modules work cooperatively, and the DCS can be widely applied to the fields of chemical engineering, energy and the like and meet the production requirements under different working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent chemical control, and specifically to an automatic propylene pressurization skid-mounted system. Background Art

[0002] A booster pump is a device that can provide high-pressure liquid flow and is widely used in industrial, agricultural, domestic water and other fields. It increases the pressure of the liquid, making it have a higher flow rate and flow volume, so as to meet the requirements in specific working scenarios. Therefore, pressurization is a necessary link in production and life. The pressurization method of traditional booster pumps has complex operation methods, cumbersome processes, single applicable working conditions, large vibrations, poor sealing, low efficiency, and no protection for the system. Therefore, there are urgent needs in production for aspects such as pressurization methods, operation processes, automatic control, system protection, convenient installation, convenient maintenance, safe operation, and equipment replacement without stopping the machine.

[0003] Therefore, the present invention proposes an integrated booster pump skid-mounted system, integrating 2 booster pumps (one standby and one in use), driving the impeller in the pump body to rotate through a motor power source, and then sucking and pressurizing the propylene liquid in the tank and transporting it. Summary of the Invention

[0004] To achieve the above purposes, the technical solutions adopted by the present invention are as follows:

[0005] An automatic propylene pressurization skid-mounted system includes a skid-mounted device and a control system. The skid-mounted device is designed with an integrated machine and pump, and the skid-mounted pipeline is prefabricated and installed in a standardized manner. The pipeline is arranged in layers within the skid-mounted frame. One end of the pipeline is connected to a driving pump, a control box is designed above the driving pump, a junction box is provided above the control box, and instruments are designed on the pipeline.

[0006] The control system has a double-parallel pressurization circuit. The double-parallel pressurization circuit includes a working pressurization circuit and a standby pressurization circuit. The working pressurization circuit and the standby pressurization circuit are completely independently configured and are quickly switched through electric valves. Only the working pressurization circuit is put into operation during normal operation, and the standby pressurization circuit remains in a hot standby state.

[0007] The control system includes a circulating pressure stabilizing module. The circulating pressure stabilizing module is arranged in the working pressurization circuit and the standby pressurization circuit to absorb and store the excess pressure. The circulating pressure stabilizing module monitors the pressure difference between the two circuits in real time. When the pressure difference exceeds the set threshold (±0.05 MPa), the flow rate is dynamically distributed through a regulating valve group to ensure pressure balance.

[0008] The control system includes a drive module, which includes an emergency shut-off interlock module. The drive module adopts a redundant dual-drive pump configuration. Each drive pump is equipped with an independent motor and frequency conversion control system. The dual-drive pumps are connected to the dual-parallel boost circuit and the circulation voltage stabilization module through an intelligent switching system; when the drive pump is started, the circulation voltage stabilization module is pre-charged in advance, and when the drive pump is shut down, the circulation voltage stabilization module automatically switches to bypass mode.

[0009] The control system includes a DCS system, which utilizes a redundant distributed architecture and is equipped with multiple controllers that serve as hot backups. Data and control instructions are synchronized in real time between the controllers via high-speed redundant communication links. The DCS integrates a multi-dimensional sensor monitoring module, dual-parallel boost circuits, and a drive module. The working boost circuit monitors remotely transmitted pressure data in real time. The DCS automatically controls the start and stop of the pump skid based on data fed back by the multi-dimensional sensor monitoring module. If an anomaly occurs in the working boost circuit, the backup boost circuit is activated and connected to the DCS system, enabling non-stop maintenance.

[0010] Furthermore, the dual-parallel booster circuits are equipped with a safety circuit connected to an emergency shutoff interlock module. When the safety circuit is triggered, the driver module prioritizes the emergency shutoff sequence. The safety circuit also includes a backpressure valve with a discharge conduit. The backpressure valve and discharge conduit automatically open based on a set pressure threshold, precisely controlling the rate of pressure release to prevent sudden pressure drops from causing water hammer or equipment shock. The shutoff valves incorporate a built-in displacement-pressure dual feedback mechanism, which transmits valve status to the DCS in real time. Immediately after shutoff, a nitrogen purge is initiated to displace residual media with inert gas, ensuring maintenance safety.

[0011] Furthermore, the emergency cut-off interlock module is connected in parallel with multiple operating modes, including independent operation without relying on the DCS system, direct access operation of sensors, and operation judged by the intelligent control module of the DCS system through software algorithms. The independent hardware operation mode without relying on the DCS system constitutes an independent circuit through hard-wired components such as relays, pressure switches, and temperature switches, and can operate without the power supply or instructions of the DCS system. When the on-site parameters exceed the preset threshold, the pressure switch / temperature switch directly drives the relay to act, cutting off the power supply of the drive pump and closing the valve. In the direct access operation mode of sensors, key sensors such as pressure sensors and vibration sensors are directly connected to the safety PLC of the emergency cut-off interlock module through hard wiring. The data processing adopts a "two-out-of-three" voting mechanism (action is triggered when ≥2 out of three sensors of the same type are triggered), avoiding misoperation caused by single-point sensor failures. The sensor signals directly trigger the cut-off instruction through the dedicated high-speed channel of the safety PLC, bypassing the DCS system processing link. The operation mode judged by the DCS software algorithm collects multi-dimensional data such as pressure, temperature, flow rate, and vibration, and comprehensively judges whether to trigger the cut-off through fuzzy logic or machine learning algorithms. It can identify complex fault scenarios such as "normal pressure but sudden drop in flow rate + abnormal vibration", and is more accurate in triggering cuts compared to single-sensor triggering, and can achieve pre-diagnosis and early intervention.

[0012] Furthermore, after the safety circuit is triggered, the emergency cut-off interlock module executes the cut-off procedure according to three-level instructions: the first-level instruction closes the inlets and outlets of the corresponding pressurization circuit, and at the same time triggers the back-pressure valve to open and discharge the conduit; the second-level instruction cuts off the power supply of the drive pump and then starts the purge pipeline to conduct nitrogen purging on the pipeline downstream of the cut-off valve; the third-level instruction keeps the back-pressure valve in the open state continuously until the system pressure drops below 0.1 MPa, and then gradually closes the back-pressure valve to the set pressure value to maintain a slightly positive pressure in the system to prevent air backflow.

[0013] Furthermore, a buffer is provided in the circulating voltage stabilization module to absorb pulse vibrations. The buffer adopts a nested structure of double-layer pressure vessels. The inner layer is configured with an adjustable stiffness airbag group, which consists of a main airbag and multiple auxiliary airbags, and the charging and discharging states of different airbags can be adjusted through a solenoid valve group; the main airbag responds to low-frequency large-amplitude pressure fluctuations (such as the impact during pump start and stop), absorbs energy through large-volume elastic deformation, and reduces the pressure peak value. The auxiliary airbags are aimed at high-frequency small-amplitude pulses (such as the mechanical vibration during pump operation), and quickly charge and discharge through the solenoid valve group to dynamically adjust and achieve vibration absorption in the full frequency band.

[0014] Furthermore, an efficient buffer voltage stabilization module is provided in the circulating voltage stabilization module. The efficient buffer voltage stabilization module is arranged in the booster pump skid-mounted pipeline. The voltage stabilization mechanism of the efficient buffer voltage stabilization module consists of a multi-stage damping voltage stabilization cavity, an adjustable throttle valve group, and a pressure compensation device. The multi-stage damping voltage stabilization cavity adopts a labyrinth flow channel design, and the medium undergoes multiple direction conversions in the cavity. By extending the flow path and increasing the frictional resistance, the remaining pressure fluctuations are eliminated. The adjustable throttle valve group is equipped with a tuning fork type flow sensor and a piezoelectric pressure sensor to construct a double-parameter feedback control closed loop. The DCS system dynamically adjusts the opening of the valve group according to the flow deviation and pressure gradient. The check valve and the cut-off valve are interlocked to synchronously block the reverse flow of the medium during emergency cut-off, and cooperate with the safety loop to achieve a complete protection chain of "cut-off - pressure relief - purging".

[0015] Furthermore, the circulating voltage stabilization module includes a full-life cycle management system. The full-life cycle management system includes the fatigue life prediction of the buffer airbag and the fault prediction of the efficient buffer voltage stabilization module. The full-life cycle management system realizes the status monitoring and life prediction of the buffer airbag and the efficient buffer voltage stabilization module through a closed-loop mechanism of "data acquisition - model analysis - fault warning". The fatigue life prediction of the buffer airbag monitors parameters such as the airbag pressure cycle times, pressure change rate (ΔP / Δt), temperature fluctuation range, and medium corrosivity (propylene water content, impurity content) in real time through multi-parameter data acquisition. Based on the Paris formula of the fatigue crack growth model, the crack initiation and propagation rates of the airbag material under cyclic loading are calculated. The fault prediction of the efficient buffer voltage stabilization module acquires and monitors multiple parameters such as the pressure difference before and after the damping plate, the throttle valve opening, the response time of the pressure compensation device, and the medium flow fluctuation, and uploads them to the DCS system in real time through distributed sensors. The wavelet transform is used to perform time-frequency analysis on the vibration signal to extract the characteristic frequency of the damping plate wear. An abnormal relationship model of pressure difference - flow rate is established through flow field simulation when the throttle valve is stuck. When the monitoring data deviates from the normal working condition by more than the threshold, the system automatically matches the fault feature library, locates the fault type, and gives maintenance suggestions.

[0016] Furthermore, the DCS system includes an intelligent control module. The intelligent control module includes a low-load mode, a high-load mode, a fault switching mode, and a pre-cooling / pre-heating mode. The intelligent control module intelligently selects a suitable boosting mode.

[0017] Low-load mode: Only the working boosting circuit is enabled, and the standby boosting circuit is in the "hot standby inspection" state. The circulating voltage stabilization module adjusts the buffer airbag pressure to 0.8 MPa to optimize the single-loop pressure stability. The drive pump adopts variable frequency control, and the speed is reduced to 40 - 60% of the rated value. When parking, it automatically switches to the low-load mode and slowly decelerates to stop to prevent damage to the impeller due to "dry running of the pump".

[0018] High-load mode: Dual-loop parallel operation. It is started when the system load rate > 75% or a single loop cannot meet the flow demand. The DCS system dynamically distributes the flow through the fuzzy PID algorithm. The circulation voltage stabilization module enables the dual-loop pressure balance mechanism. By adjusting the opening degrees of the throttle valves in the two loops, the pump speed is driven to increase to 80 - 100% of the rated value, and the load balancing control is enabled to avoid overloading of a single pump.

[0019] Fault switching mode: When an abnormality is detected in the working pressurization loop, it automatically switches to the standby pressurization loop. At the same time, the DCS system automatically generates a fault log to locate the problem to specific components.

[0020] Pre-cooling / pre-heating mode: Adjust the equipment operating state in advance according to the ambient temperature to prevent start-up shock. During the start-up stage, control the medium temperature through the pre-cooling / pre-heating mode to avoid pipeline vibration caused by start-up shock; start the pipeline electric heating in low-temperature scenarios, and the buffer airbag is pre-pressurized to 1.0 MPa in advance to compensate for the gas volume contraction at low temperatures; use the S-curve method when starting the pump to avoid start-up shock caused by the increase in medium viscosity at low temperatures; in high-temperature scenarios, turn on the cooling system (water-cooled or air-cooled) to control the medium temperature below 45°C; optimize the throttle valve opening degree to increase the medium flow rate to prevent high-temperature gasification; the standby pressurization loop remains in the "cold standby" state.

[0021] The beneficial effects of the improved technical solution are as follows:

[0022] The intelligent control of the dual parallel pressurization loop and the DCS system is deeply integrated, breaking the boundary between hardware equipment and software systems, and deeply integrating traditional separate mechanical design, control logic, safety protection, and operation and maintenance management to form a full-life cycle solution for pressurization of high-risk media, especially suitable for chemical scenarios with continuous production, extreme environments, and high safety requirements. It realizes the control strategy of equipment maintenance from "dominated by manual experience" to "data-driven decision-making", and this mode can become a typical reference for industrial intelligent upgrading.

[0023] The full-life cycle management system of the circulation voltage stabilization module upgrades the maintenance mode of the circulation voltage stabilization module from "after-event maintenance" to "active prevention" through the prediction technology that combines data-driven and physical mechanism, laying a foundation for the intelligent and unmanned operation and maintenance of the propylene pressurization skid-mounted system, especially suitable for continuous production scenarios.

[0024] The multi-mode parallel operation of the emergency cut-off interlock module breaks through the limitation of the traditional safety system's "single trigger mode" through the hierarchical design of "hardware guarantee, sensor speed increase, and software intelligence", providing a safe solution with both reliability and flexibility for the pressurized transportation of high-risk media such as propylene. Brief Description of the Drawings

[0025] Figure 1 It is the control system diagram of the present invention.

[0026] Figure 2 This is the double - parallel supercharging flow chart of the present invention.

[0027] Figure 3 This is the structure diagram of the skid - mounted device of the present invention. Detailed implementation manners

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present invention.

[0029] An automatic propylene supercharging skid - mounted system includes a skid - mounted device and a control system. This technical solution has functions of automatically controlling the system pressure, system protection, adjustable pressure, convenient maintenance, good sealing performance, high installation compatibility, updatable and upgradable according to requirements, and overhauling, maintaining and replacing without stopping the vehicle.

[0030] Reference Figure 3 , the skid - mounted device is designed with an integrated machine - pump and installed on a movable base frame. The frame structure is a welded frame made of Q345B steel. The skid - mounted pipeline is installed with standardized prefabrication. Pipeline 1 is arranged in layers within the skid - mounted frame. One end of Pipeline 1 is connected to drive pump 11. Above drive pump 11, there is a control box 12 with a built - in PLC controller, frequency converter and relay module. Above control box 12, there is a junction box 13 with a built - in surge protector, supporting 48 - way signal access. The pipeline connection adopts raised - face and male - face flanges (ASME B16.5 Class 300), and the sealing surface is surfacing - welded with hard alloy.

[0031] Drive pump 11 adopts a diaphragm metering pump. The impeller in the drive pump body of the diaphragm metering pump rotates, thereby sucking and pressurizing the liquid and then discharging it, and is equipped with a diaphragm rupture alarm. At the air inlet end of drive pump 11, there is a Y - type filter 14. Filter 14 filters impurities, waste and sediment in the pipeline, protects components such as valves and instruments, and ensures the normal operation of the supercharging pump system.

[0032] The main path 1A at the air outlet end of drive pump 11 is connected to a double - layer pressure buffer 15. Buffer 15 absorbs the pulse vibration of the diaphragm metering pump. When the pressure rises rapidly, the internal airbag in buffer 15 absorbs and stores the excess pressure. When the pressure drops rapidly, the internal airbag in buffer 15 releases the stored pressure, fully absorbing and stabilizing the stroke vibration of the diaphragm metering pump, making the pipeline supercharging stable. Buffer 15 is equipped with a pressure gauge to real - time display the pressure value of the pipeline system after supercharging, ensuring the accuracy of the pressure gauge reading. Buffer 15 is composed of a main airbag + auxiliary airbag and is equipped with a pressure sensor.

[0033] Furthermore, a safety circuit 1B is provided at the air outlet end of the driving pump 11, and a pilot-operated backpressure valve 16 is installed on the safety circuit 1B. The backpressure valve 16 sets a pressure value (minimum passing pressure) according to the system requirements to ensure that the system pressure will not be too high, maintain the pressure of the boosting system within the pressure range required for system operation, and protect the pipeline system at the same time; the backpressure valve 16 is an important safety device of this technology. Under normal circumstances, it is sealed and closed. In the case of abnormal tank pressure during heating, fire, operation errors, etc., when the pressure reaches the set pressure of the backpressure valve, the backpressure valve automatically opens and starts discharging and relieving pressure. When the pressure drops to the reseating pressure of the backpressure valve, the valve automatically closes and returns to the normal sealed state, thus ensuring the safe use and economy of the product. When the medium is flammable, explosive, highly toxic and harmful, a conduit is installed at the discharge port of the backpressure valve to lead the discharged medium to a safe location for proper treatment and not directly discharge it into the atmosphere to ensure the safety and environmental protection of the product.

[0034] Furthermore, check valves are installed on the main circuit 1A and the safety circuit 1B to only allow the medium to pass through unidirectionally and flow along the set route, preventing the medium from flowing back and ensuring that the pipeline system pressure will not decrease.

[0035] As Figure 2 The double-parallel boosting circuit shown in the figure includes a working boosting circuit and a standby boosting circuit. The working boosting circuit and the standby boosting circuit are completely independently configured with hardware equipment and instruments, and are quickly switched through electric valves. Only the working boosting circuit is put into operation during normal operation, and the standby boosting circuit remains in a hot standby state.

[0036] As Figure 1 The control system includes a DCS system. The DCS system is connected to a multi-dimensional sensor monitoring module, a double-parallel boosting circuit, and a driving module. The working boosting circuit monitors and transmits pressure data in real time. The DCS system automatically controls the start and stop of the pump skid according to the data fed back by the multi-dimensional sensor monitoring module. The standby boosting circuit is turned on when the working boosting circuit is abnormal and is connected to the DCS system to achieve maintenance without stopping. The multi-dimensional sensor monitoring module includes a hardware wiring control channel.

[0037] The DCS system adopts a redundant distributed architecture with multiple controllers in hot standby with each other. Data and control instructions are synchronized in real time between the controllers through a high-speed redundant communication link. The controller hardware uses Siemens redundant controllers. The ET200SP distributed I / O includes 80 AI channels, 40 AO channels, 60 DI channels, and 40 DO channels. The communication network uses an industrial Ethernet redundant ring network + PROFIBUS DP. The software operating system is the Windows industrial version with redundant deployment; the control software uses Siemens PCS7, which supports CFC / SFC programming; the database uses PI System + SQL Server.

[0038] Furthermore, the DCS system includes an intelligent control module, which includes a low-load mode, a high-load mode, a fault-switching mode, and a pre-cooling / pre-heating mode. The intelligent control module intelligently selects an appropriate pressurization mode.

[0039] Low-load mode: Only the working pressurization circuit is enabled, and the standby pressurization circuit is in the "hot standby inspection" state. The circulating pressure stabilization module adjusts the airbag pressure of the buffer to 0.8 MPa to optimize the pressure stability of the single circuit. The drive pump adopts variable-frequency control, and the speed is reduced to 40-60% of the rated value. When stopping, it automatically switches to the low-load mode and slowly decelerates to stop to prevent damage to the impeller caused by "dry running of the pump".

[0040] High-load mode: The two circuits operate in parallel. It is started when the system load rate > 75% or a single circuit cannot meet the flow demand. The DCS system dynamically distributes the flow through the fuzzy PID algorithm. The circulating pressure stabilization module activates the two-circuit pressure balance mechanism. By adjusting the opening of the throttle valves of the two circuits, the speed of the drive pump is increased to 80-100% of the rated value, and the load balancing control is enabled to avoid overload of a single pump.

[0041] Fault-switching mode: When an abnormality is detected in the working pressurization circuit, it automatically switches to the standby pressurization circuit. At the same time, the DCS system automatically generates a fault log to locate the problem to a specific component;

[0042] Pre-cooling / pre-heating mode: Adjust the operating state of the equipment in advance according to the ambient temperature to prevent startup shock. During the startup phase, control the medium temperature through the pre-cooling / pre-heating mode to avoid pipeline vibration caused by startup shock; in the scenario of low temperature < 5°C, start the pipeline electric heating, and the airbag of the buffer is pre-pressurized to 1.0 MPa in advance to compensate for the volume contraction of the gas at low temperature; when the pump starts, the S-curve method is adopted to avoid startup shock caused by the increase in the viscosity of the medium at low temperature; in the scenario of high temperature > 35°C, turn on the cooling system (water cooling or air cooling) to control the medium temperature below 45°C; optimize the opening of the throttle valve to increase the flow rate of the medium to prevent gasification at high temperature; the standby pressurization circuit remains in the "cold standby" state.

[0043] Such as Figures 1 - 3 The control system includes a drive module (corresponding to Figure 3 the drive pump 11 in the hardware and the connected valves and instruments). The drive module includes an emergency cut-off interlock module. The drive module adopts a redundant dual-drive pump configuration. Each drive pump is equipped with an independent motor and a variable-frequency control system. The two drive pumps are connected to the dual-parallel pressurization circuit and the circulating pressure stabilization module through an intelligent switching system; when the drive pump starts, the circulating pressure stabilization module pre-pressurizes in advance, and when the drive pump stops, the circulating pressure stabilization module automatically switches to the bypass (i.e., the safety circuit) mode.

[0044] Furthermore, such as Figure 1 、 2The dual-parallel booster circuits shown are equipped with a safety circuit connected to the driver module's emergency shutoff interlock. When the safety circuit is triggered, the driver module prioritizes the emergency shutoff sequence. The safety circuit includes a backpressure valve and a shutoff valve, which are connected to the purge line. The backpressure valves are equipped with a discharge conduit. The backpressure valves and discharge conduit automatically open at a set pressure threshold, precisely controlling the pressure release rate to prevent sudden pressure drops from causing water hammer or equipment shock. The shutoff valves feature a built-in displacement-pressure dual feedback mechanism, which transmits valve status to the DCS in real time. A nitrogen purge is initiated immediately after shutoff, replacing any residual media with inert gas to ensure maintenance safety.

[0045] Furthermore, after the safety circuit is triggered, the emergency shut-off interlock module executes the shut-off procedure according to the three-level instruction: the first-level instruction closes the corresponding boost circuit inlet and outlet, and at the same time triggers the back-pressure valve to open the discharge duct. After the second-level instruction cuts off the power supply of the drive pump, the purge pipeline is started to purge the pipeline downstream of the shut-off valve with nitrogen. The third-level instruction keeps the back-pressure valve open until the system pressure drops below 0.1MPa, and then gradually closes the back-pressure valve to the set pressure value to maintain a slight positive pressure in the system to prevent air backflow.

[0046] Furthermore, the emergency shutoff interlock module supports multiple operating modes in parallel, including independent operation independent of the DCS, direct sensor access, and operation determined by software algorithms within the DCS's intelligent control module. The independent hardware-independent operation mode utilizes hard-wired components such as relays, pressure switches, and temperature switches to form an independent circuit. The switches directly drive the relays, eliminating the need for DCS power or commands. When field parameters exceed preset thresholds, the pressure / temperature switches directly activate the relays, shutting off power to the pump and closing the valve. The direct sensor access mode connects key sensors, such as pressure and vibration sensors, directly to the emergency shutoff interlock module's safety PLC via hardwiring. Data processing utilizes a "two out of three" voting mechanism (activation occurs only when ≥ two of three sensors of the same type are triggered), preventing false activation caused by single-point sensor failure. Sensor signals directly trigger the shutoff command via a dedicated high-speed channel within the safety PLC, bypassing DCS processing. The DCS software algorithm determines the operating mode by collecting multi-dimensional data such as pressure, temperature, flow, and vibration, and then uses fuzzy logic or machine learning algorithms to comprehensively determine whether to trigger the shutoff. It can identify complex fault scenarios such as "normal pressure but sudden drop in flow + abnormal vibration", which is more accurate than a single sensor trigger and can achieve pre-diagnosis and early intervention.

[0047] like Figures 1 - 3 The control system shown includes a cycle voltage stabilization module (corresponding to Figure 3The buffer 15 in the hardware and the connected valve instruments), the circulation pressure stabilization module is set in the pipeline node of the working boost circuit and the standby boost circuit to absorb and store excess pressure. The circulation pressure stabilization module monitors the pressure difference between the two circuits in real time. When the pressure difference exceeds the set threshold (±0.05MPa), the flow is dynamically distributed by adjusting the valve group to ensure pressure balance.

[0048] Furthermore, a buffer 15 is provided in the circulation voltage stabilization module to absorb pulse vibrations. The buffer 15 adopts a double-layer pressure vessel nested structure, and the inner layer is configured with an adjustable stiffness airbag group, which consists of a main airbag and multiple auxiliary airbags. The inflation and deflation states of different airbags can be adjusted through the solenoid valve group; the main airbag can respond to low-frequency and large-amplitude pressure fluctuations (such as the impact when the pump starts and stops), absorb energy through large-volume elastic deformation, and reduce the pressure peak. The auxiliary airbag can respond to high-frequency and small-amplitude pulses (such as mechanical vibration when the pump is running), and can be quickly inflated and deflated through the solenoid valve group, and dynamically adjusted to achieve full-band vibration absorption.

[0049] Furthermore, the circulating pressure-stabilizing module is equipped with a high-efficiency buffering and stabilizing module, installed in the booster pump skid-mounted pipeline. Its stabilizing mechanism consists of a multi-stage damping and stabilizing chamber 17, an adjustable throttle valve group, and a pressure compensation device. The multi-stage damping and stabilizing chamber 17 employs a labyrinthine flow channel design, allowing the medium to undergo multiple directional changes within the chamber. This eliminates residual pressure fluctuations by extending the flow path and increasing frictional resistance. The adjustable throttle valve group is equipped with a tuning fork flow sensor and a piezoelectric pressure sensor, creating a dual-parameter feedback control closed loop. The DCS system dynamically adjusts the valve group opening based on flow deviation and pressure gradient. A check valve is interlocked with a shut-off valve in the pipeline. The shut-off valve is connected to a purge line to simultaneously block backflow of the medium in the event of an emergency shut-off. This, in conjunction with the safety circuit, completes a complete "shut-off-pressure relief-purge" protection chain.

[0050] Further, such as Figure 1The cyclic voltage stabilizing module shown includes a full-life cycle management system, which includes the fatigue life prediction of the buffer airbag and the fault prediction of the high-efficiency buffer voltage stabilizing module. Through the closed-loop mechanism of "data acquisition - model analysis - fault warning", the full-life cycle management system realizes the status monitoring and life prediction of the buffer airbag and the high-efficiency buffer voltage stabilizing module. The fatigue life prediction of the buffer airbag monitors parameters such as the number of airbag pressure cycles, pressure change rate (ΔP / Δt), temperature fluctuation range, and medium corrosiveness (propylene water content, impurity content) in real time through multi-parameter data acquisition. Based on the Paris formula of the fatigue crack propagation model, the crack initiation and propagation rate of the airbag material under cyclic load are calculated. The fault prediction of the high-efficiency buffer voltage stabilizing module acquires and monitors multiple parameters such as the pressure difference before and after the damping plate, throttle valve opening, response time of the pressure compensation device, and medium flow fluctuation, and uploads them to the DCS system in real time through distributed sensors. Wavelet transform is used to perform time-frequency analysis on the vibration signal to extract the characteristic frequency of damping plate wear; an abnormal relationship model between pressure difference and flow rate is established through flow field simulation when the throttle valve is stuck. When the deviation between the monitored data and the normal working condition exceeds the threshold, the system automatically matches the fault feature library, locates the fault type and gives maintenance suggestions.

[0051] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0052] In this article, specific examples are used to elaborate on the principles and implementation methods of the present invention. The description of the above examples is only used to help understand the method of the present invention and its core idea. The above is only the preferred implementation mode of the present invention. It should be pointed out that due to the limited nature of written expression, objectively there are infinite specific structures. For those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements, embellishments or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, embellishments, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, should all be regarded as the protection scope of the present invention.

Claims

1. An automatic pressurization skid-mounted system for propylene, comprising a skid-mounted device and a control system, characterized in that: The control system includes a dual parallel pressurization circuit, and the dual parallel pressurization circuit includes a working pressurization circuit and a standby pressurization circuit. The control system includes a circulating voltage stabilizing module, and the circulating voltage stabilizing module is arranged in the working pressurization circuit and the standby pressurization circuit to absorb and store excess pressure. The control system includes a driving module, and the driving module includes an emergency cut-off interlock module. The driving module adopts a redundant dual-drive pump configuration. Each drive pump is equipped with an independent motor and a variable frequency control system. The dual-drive pumps are connected to the dual parallel pressurization circuit and the circulating voltage stabilizing module through an intelligent switching system; when the drive pump starts, the circulating voltage stabilizing module pre-charges in advance, and when the drive pump stops, the circulating voltage stabilizing module automatically switches to the bypass mode. The control system includes a DCS system. The DCS system is connected to a multi-dimensional sensor monitoring module, a dual parallel pressurization circuit, and a driving module. The working pressurization circuit monitors and transmits pressure data in real time. The DCS system automatically controls the start and stop of the pump skid according to the data fed back by the multi-dimensional sensor monitoring module. The standby pressurization circuit is turned on when the working pressurization circuit is abnormal and is connected to the DCS system to achieve maintenance without stopping the vehicle. The DCS system includes an intelligent control module, and the intelligent control module intelligently selects a suitable pressurization mode: Low load mode: Only the working pressurization circuit is enabled. High load mode: The two circuits operate in parallel. Fault switching mode: When it is detected that the working pressurization circuit is abnormal, it automatically switches to the standby pressurization circuit. Pre-cooling / pre-heating mode: Adjust the operating state of the equipment in advance according to the ambient temperature to prevent start-up shock.

2. The automatic pressure boosting skid-mounted system for propylene according to claim 1, wherein: A safety circuit is equipped on the dual parallel pressurization circuit. The safety circuit is connected to the emergency cut-off interlock module. When the safety circuit is triggered, the driving module preferentially executes the emergency cut-off procedure; a back pressure valve is included on the safety circuit, and a discharge conduit is provided on the back pressure valve.

3. The automatic pressurization skid-mounted system for propylene according to claim 1, wherein: A buffer is provided in the circulating voltage stabilizing module to absorb pulse vibration. The buffer adopts a double-layer pressure vessel nested structure. The inner layer is configured with an adjustable stiffness airbag group, which is composed of a main airbag and multiple auxiliary airbags. The charging and discharging states of different airbags can be adjusted through a solenoid valve group; a high-efficiency buffer voltage stabilizing module is provided in the circulating voltage stabilizing module, and the high-efficiency buffer voltage stabilizing module is arranged in the pressurization pump skid-mounted pipeline.

4. The automatic pressure boosting skid-mounted system for propylene according to claim 1, wherein: The emergency cut-off interlock module is connected in parallel with multiple operating modes, including independent operation without relying on the DCS system, direct access operation of sensors, and operation judged by the software algorithm of the intelligent control module of the DCS system.

5. The automatic pressurization skid-mounted propylene system according to claim 1, characterized in that: The DCS system adopts a redundant distributed architecture, configured with multiple controllers in hot standby with each other, and the controllers synchronize data and control instructions in real time through a high-speed redundant communication link.

6. The automatic pressurization skid-mounted system for propylene according to claim 1, wherein: The described cyclic voltage stabilizing module includes a full life cycle management system. The full life cycle management system includes a buffer airbag fatigue life prediction and a high-efficiency buffer voltage stabilizing module fault prediction. The buffer airbag fatigue life prediction is carried out through multi-parameter data acquisition and calculation of the crack initiation and propagation rate of the airbag material under cyclic loads based on the Paris formula of the fatigue crack propagation model.

7. An automatic pressurization skid-mounted system for propylene according to claim 2, characterized in that: The described emergency cut-off interlock module includes a first-level instruction, a second-level instruction, and a third-level instruction. The first-level instruction closes the inlets and outlets of the corresponding pressurization circuit and simultaneously triggers the opening of the back-pressure valve to discharge the conduit. After the second-level instruction cuts off the power supply of the driving pump, it starts the purging pipeline to conduct nitrogen purging on the pipeline downstream of the cut-off valve. The third-level instruction keeps the back-pressure valve in an open state continuously until the system pressure drops below 0.1 MPa, and then gradually closes the back-pressure valve to the set pressure value to maintain a slightly positive pressure in the system to prevent air backflow.

8. An automatic pressurization skid-mounted system for propylene according to claim 3, characterized in that: The described high-efficiency buffer voltage stabilizing module is composed of a multi-stage damping voltage stabilizing cavity, an adjustable throttle valve group, and a pressure compensation device. The multi-stage damping voltage stabilizing cavity adopts a labyrinth flow channel design, and the medium undergoes multiple direction conversions in the cavity. By extending the flow path and increasing the frictional resistance, the remaining pressure fluctuations are eliminated. The adjustable throttle valve group is equipped with a tuning fork type flow sensor and a piezoelectric pressure sensor to construct a double-parameter feedback control closed loop. The DCS system dynamically adjusts the opening degree of the valve group according to the flow deviation and pressure gradient.

9. The automatic pressurizing skid-mounted system for propylene according to claim 1, wherein: The described skid-mounted device is designed with an integrated pump and motor. The skid-mounted pipeline is prefabricated and installed in a standardized manner. The pipeline is arranged in layers within the skid-mounted frame. One end of the pipeline is connected to the driving pump. There is a control box designed above the driving pump, and a junction box is provided above the control box. Instrumentation is designed on the pipeline.

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