Mold steam circulation control system and method, electronic equipment and storage medium

Abstract

The embodiment of the invention discloses a mold steam circulation control system and method, electronic equipment and a storage medium, and the system comprises an electric heating element which is used for heating a steam boiler; the steam boiler is used for generating heating steam through heating of an electric heating element; a mold cavity is formed in the mold, and the mold is used for receiving heating steam to perform heating forming; the vacuum suction unit is used for extracting the water vapor mixture in the mold cavity; the gas-liquid separator is used for separating the water vapor mixture; the gas heat recovery loop is used for compressing and heating the separated gas and returning the gas as a supplementary heat source to the mold cavity; and the control device is used for controlling the operation of the vacuum suction unit, the gas-liquid separator and the gas heat recovery loop. And by additionally arranging the gas heat recovery loop, the separated gas is re-injected into the mold cavity, so that the recycling of heat is realized. An electric heating element is adopted as a heat source of the steam boiler, and zero carbon emission is achieved from the source.

Description

Technical Field

[0001] This invention relates to the field of mold heating technology, and in particular to a mold steam circulation control system, a mold steam circulation control method, an electronic device, and a computer-readable storage medium. Background Technology

[0002] In the pulp molding industry, mold heating is a critical process that directly affects product molding quality, drying efficiency, and energy consumption. Currently, the industry commonly uses steam heating systems as the heat source for molds. The typical process is as follows: a steam boiler generates high-temperature steam for mold heating, then the steam is removed from the mold through vacuum extraction and enters a gas-liquid separator for preliminary separation. Finally, the separated gas and liquid are directly discharged to the outside.

[0003] However, traditional methods have problems such as low heat utilization rate, direct discharge of steam after one-time use leading to significant energy waste, and the possibility of additional carbon emissions from traditional fuel boilers due to incomplete combustion. Summary of the Invention

[0004] In view of the above problems, embodiments of the present invention are proposed to provide a mold steam circulation control system, a mold steam circulation control method, an electronic device, and a computer-readable storage medium that overcome or at least partially solve the above problems.

[0005] To address the aforementioned problems, a first aspect of the present invention provides a mold steam circulation control system, comprising: Electric heating elements are used to heat steam boilers; A steam boiler is used to generate heating steam by using electric heating elements; The mold has an internal cavity for receiving the heating steam for heating and molding. A vacuum suction unit, connected to the mold cavity, is used to extract the water vapor mixture inside the mold cavity; A gas-liquid separator, with its inlet connected to the outlet of the vacuum suction unit, is used to separate the water vapor mixture; The gas heat recovery circuit has its inlet connected to the gas outlet of the gas-liquid separator and its outlet connected to the mold. It is used to compress and heat the separated gas and return it to the mold cavity as a supplementary heat source. A control device is used to control the operation of the vacuum suction unit, the gas-liquid separator, and the gas heat recovery circuit.

[0006] Optionally, the gas-liquid separator includes a primary gas-liquid separator and a secondary gas-liquid separator; The primary gas-liquid separator has a conical internal flow channel, which is used to initially separate the water vapor mixture and guide the initially separated liquid water to the water collection tank of the primary gas-liquid separator. The secondary gas-liquid separator integrates a cyclone separation component and a gradient pore size filter component, which is used to receive the gas initially separated by the primary gas-liquid separator and further separate the gas to obtain the separated gas.

[0007] Optionally, the inner wall surface of the primary gas-liquid separator is provided with a hydrophobic microstructure layer, the hydrophobic microstructure layer including a protrusion array and a flow guide groove; the water collection tank of the primary gas-liquid separator is provided with a one-way valve.

[0008] Optionally, the secondary gas-liquid separator includes a gas flow channel; the cyclone separation component is disposed upstream of the gas flow channel, and the gradient pore size filter component is disposed downstream of the gas flow channel; The cyclone separation component is used to form a stable vortex of gas initially separated from the first-stage gas-liquid separator into droplets, and to cause the droplets to accumulate on the inner wall of the second-stage gas-liquid separator. The gradient aperture filter assembly includes multiple layers of metal wire mesh stacked sequentially along the gas flow direction. The aperture of each layer of metal wire mesh decreases progressively along the gas flow direction, and is used to filter the liquid droplets that accumulate on the inner wall of the secondary gas-liquid separator to obtain separated gas.

[0009] Optionally, a differential pressure sensor is installed between the inlet and outlet of the secondary gas-liquid separator to monitor the pressure difference between the inlet and outlet of the secondary gas-liquid separator, and an alarm is issued when the pressure difference exceeds a preset differential pressure threshold.

[0010] Optionally, the gas heat recovery loop includes: A gas superheater, with its inlet connected to the outlet of the gas-liquid separator, is used to superheat the separated gas. A gas compressor, with its inlet connected to the outlet of the gas superheater, is used to perform adiabatic compression on the superheated gas. A hot gas injection pipeline is used to connect the outlet of the gas compressor to the mold cavity of the mold, and is used to inject gas that has been adiabatically compressed into the mold cavity.

[0011] Optionally, the output of the control device is connected to a flow regulating valve located in the hot gas injection pipeline, for obtaining the temperature and pressure inside the mold cavity and the gas compressor, and adjusting the opening of the flow regulating valve according to the temperature and pressure.

[0012] Optionally, the control device is used to acquire mold parameters, determine the vacuum suction duration of the vacuum suction unit based on the mold parameters, and control the vacuum suction unit to perform vacuum suction on the mold cavity based on the vacuum suction duration; the mold parameters include at least one of the mold size, temperature, weight, and initial moisture content.

[0013] According to a second aspect of the present invention, a mold steam circulation control method is provided, applied to a mold steam circulation control system as described in any of the preceding claims, the method comprising: The electric heating element heats the steam boiler to generate steam, and the steam is then delivered to the mold cavity of the mold. The mold cavity is vacuumed using the vacuum suction unit. The gas-liquid separator separates the water vapor mixture obtained by vacuum suction from the vacuum suction unit to obtain the separated gas. The separated gas is compressed and heated through a gas heat recovery circuit, and the compressed and heated gas is then injected into the mold cavity.

[0014] Optionally, the gas-liquid separator includes a primary gas-liquid separator and a secondary gas-liquid separator; the process of separating the water vapor mixture obtained by vacuum suction from the vacuum suction unit through the gas-liquid separator to obtain the separated gas includes: The water vapor mixture is initially separated by the first-stage gas-liquid separator, and the liquid water obtained from the initial separation is guided to the water collection tank of the first-stage gas-liquid separator. The secondary gas-liquid separator receives the gas that has been initially separated from the primary gas-liquid separator and performs a second separation to obtain the separated gas.

[0015] Optionally, the secondary gas-liquid separator includes a cyclone separation component and a gradient pore size filter component; the step of receiving the gas initially separated from the primary gas-liquid separator through the secondary gas-liquid separator and further separating the gas to obtain the separated gas includes: The cyclone separation component forms a stable vortex from the gas initially separated by the first-stage gas-liquid separator, which then forms droplets and causes the droplets to accumulate on the inner wall of the second-stage gas-liquid separator. The liquid droplets that accumulate on the inner wall of the secondary gas-liquid separator are filtered through the multi-layer metal wire mesh of the gradient pore size filter assembly to obtain the separated gas.

[0016] Optionally, a differential pressure sensor is installed between the inlet and outlet of the secondary gas-liquid separator; the method further includes: The differential pressure sensor monitors the pressure difference between the inlet and outlet of the secondary gas-liquid separator, and an alarm is triggered when the pressure difference exceeds a preset differential pressure threshold.

[0017] Optionally, the gas heat recovery circuit includes a gas superheater, a gas compressor, and a hot gas injection pipeline; the step of compressing and heating the separated gas through the gas heat recovery circuit includes: The separated gas is superheated by the gas superheater. The superheated gas is adiabatically compressed using the gas compressor. The gas, after being adiabatic and compressed, is injected into the mold cavity through the hot gas injection pipeline.

[0018] Optionally, the method further includes: The temperature and pressure inside the mold cavity and the gas compressor are obtained; The opening degree of the flow regulating valve of the hot gas injection pipeline is determined based on the temperature and pressure.

[0019] Optionally, the vacuum suction unit for vacuum suction of the mold cavity includes: Obtain the mold parameters; the mold parameters include at least one of the following: mold size, temperature, weight, and initial moisture content; The vacuum suction duration of the vacuum suction unit is determined based on the mold parameters. The vacuum suction unit is controlled to perform vacuum suction on the mold cavity according to the vacuum suction duration.

[0020] According to a third aspect of the present invention, an electronic device is provided, comprising: a processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the steps of the mold steam circulation control method as described in any of the preceding claims.

[0021] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements the steps of the mold steam circulation control method as described in any of the preceding claims.

[0022] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects: This invention discloses a mold steam circulation control system, method, electronic device, and storage medium, comprising: an electric heating element for heating a steam boiler; a steam boiler for generating heating steam through the electric heating element; a mold with an internal mold cavity for receiving heating steam for heating and molding; a vacuum suction unit connected to the mold cavity for extracting a water vapor mixture from the mold cavity; a gas-liquid separator with its inlet connected to the outlet of the vacuum suction unit for separating the water vapor mixture; a gas heat recovery circuit with its inlet connected to the gas outlet of the gas-liquid separator and its outlet connected to the mold for compressing and heating the separated gas and returning it to the mold cavity as a supplementary heat source; and a control device for controlling the operation of the vacuum suction unit, the gas-liquid separator, and the gas heat recovery circuit. By using an electric heating element as the heat source for the steam boiler, zero carbon emissions are achieved from the source during the heating process, avoiding emission problems caused by incomplete combustion. By adding a gas heat recovery circuit, the separated gas is compressed and heated to become a high-temperature supplementary heat source and reinjected into the mold cavity, thus converting the originally waste heat into effective process heat energy and realizing the recycling of heat within the system. Attached Figure Description

[0023] Figure 1 This is a structural block diagram of a mold steam circulation control system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the separation process of a two-stage gas-liquid separator in a mold steam circulation control system provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the steam circulation process of a mold steam circulation control system provided in an embodiment of the present invention; Figure 4 This is a flowchart of a mold steam circulation control method provided in an embodiment of the present invention. Detailed Implementation

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Traditional methods suffer from low heat utilization, significant energy waste due to direct exhaust of steam after single use, and additional carbon emissions from traditional fuel boilers due to incomplete combustion.

[0026] One of the core concepts of this invention is the use of electric heating elements as the heat source for the steam boiler, achieving zero carbon emissions in the heating process from the source and avoiding emission problems caused by incomplete combustion. By adding a gas heat recovery circuit, the separated gas is compressed and heated, converted into a high-temperature supplementary heat source, and reinjected into the mold cavity, transforming the originally wasted waste heat into effective process heat energy, thus realizing the recycling and reuse of heat within the system.

[0027] Reference Figure 1 The diagram shows a structural block diagram of a mold steam circulation control system provided by an embodiment of the present invention. The system 10 specifically includes: The electric heating element 101 is used to heat the steam boiler 102; Electric heating elements are the core heating components of steam boilers, responsible for efficiently and precisely converting electrical energy into heat energy, thereby heating the water in the boiler to saturated steam at the required pressure and temperature. Compared to traditional fuel boilers, which are widely used in the traditional pulp molding industry (coal, gas, or biomass), the combustion process inevitably produces emissions of carbon dioxide (CO2), nitrogen oxides (NOx), and soot. This invention employs pure electric heating, with no combustion chemical reactions during the heating process, thus achieving "zero emissions" of direct greenhouse gases and pollutants at the steam generation stage.

[0028] In the mold steam circulation control system of this invention, the steam boiler is the core energy supply device responsible for converting water into high-temperature, high-pressure saturated steam. The boiler integrates multiple sets of high-efficiency electric heating elements (such as immersion stainless steel electric heating tubes, electromagnetic eddy current heaters, etc.) to directly or indirectly heat the water in the boiler's inner tank. When the electric heating elements are activated, they continuously heat the water in the boiler until it boils and vaporizes, generating saturated steam.

[0029] Steam boiler 102 is used to generate heating steam by heating via electric heating element 101; The steam boiler is equipped with a water storage device and a pressure-resistant shell that are tightly coupled with electric heating elements. Through the conversion of electrical energy into thermal energy by the electric heating elements, the water inside the chamber is heated efficiently and controllably, thereby generating heated steam that meets the preset temperature and pressure parameters. The steam boiler constitutes the initial clean heat source center of the system. The heated steam it generates is transported to the cavity of the mold through a pipeline network, providing the necessary heat energy for the heating and molding of the pulp molded preform.

[0030] Steam boilers heat water using high-efficiency electric heating elements to produce high-pressure saturated steam. Compared with traditional fuel boilers, this electric heating method has the advantages of zero direct emissions and precise temperature control, avoiding carbon emission problems caused by incomplete combustion and better meeting green manufacturing standards.

[0031] In this embodiment of the invention, high-pressure heating steam is delivered to the mold cavity via a network of high-temperature resistant stainless steel pipes. The uniform heating of the pulp molded preform is achieved through a dual mechanism: heat convection driven by steam flow and heat conduction directly from the mold's metal walls. This process rapidly evaporates moisture from the preform, significantly improving the softening of the fiber structure, laying the foundation for subsequent demolding and product strength. Simultaneously, uniform heating enhances the uniformity of product density, effectively reducing the scrap rate.

[0032] Mold 103 has an internal mold cavity for receiving the heating steam for heating and molding. The mold body has a structure with a specific product cavity, and its interior has complex flow channels connected to steam pipes and vacuum pipes to receive high-temperature heating steam from a steam boiler. During the heating stage, the steam efficiently transfers its heat energy to the surface of the mold cavity through the flow channels, uniformly heating and hot-pressing the wet pulp molded blank placed inside. During the drying stage, the mold cavity forms a negative pressure environment through a vacuum suction unit, accelerating the evaporation and extraction of moisture from the blank.

[0033] Meanwhile, the mold is also equipped with a dedicated interface connected to the gas heat recovery circuit to receive supplementary high-temperature gas after compression and heating, so as to provide auxiliary heat to the cavity during the vacuum drying stage, maintain the stability of the process temperature, and thus achieve efficient, energy-saving and high-quality product production.

[0034] In this embodiment of the invention, the mold has a cavity that matches the shape of the target product. This cavity is connected to the output end of a steam boiler via a high-temperature and pressure-resistant steam pipe, directly receiving heated steam generated by the boiler and filling the cavity or allowing it to flow through a pre-designed heating channel. The heat carried by the heated steam is rapidly and evenly transferred to the wet pulp molded blank placed in the mold cavity through heat conduction and convection, softening the fibers and evaporating the moisture. Under the combined action of heat and pressure, the blank is shaped and initially dried, thus achieving an efficient and stable thermoforming process.

[0035] Steam efficiently transfers its heat energy to the mold cavity surface through the flow channel, uniformly heating and hot-pressing the wet pulp molded blank placed inside. Because the hot press needs to maintain a certain temperature, vacuum suction occurs during the hot pressing process. During the hot pressing process, water vapor will be discharged from the pulp molded product. At this time, the vacuum is turned on, and the water vapor is discharged into the gas-liquid separator by delay control of the vacuum suction for a certain period of time. Then the vacuum is turned off, otherwise it will affect the temperature of the mold.

[0036] A vacuum suction unit 104 is connected to the mold cavity and is used to extract the water vapor mixture inside the mold cavity. In the mold steam circulation control system of this invention, the vacuum suction unit is the core power component that drives the water vapor mixture to flow in a directional and efficient manner during the drying stage. The vacuum suction unit typically consists of a vacuum pump, vacuum pipeline, vacuum valve, and vacuum sensor. Its core function is to establish and maintain a preset negative pressure (vacuum) environment within the sealed mold cavity during a specific drying stage after heat forming.

[0037] When the control system issues a drying command, the vacuum suction unit starts. The vacuum valve opens, and the vacuum pump begins to work, forcefully extracting the gas from the mold cavity through the vacuum pipeline. The negative pressure formed inside the cavity generates a strong suction force, acting on the water vapor mixture (including residual heating steam and water vapor evaporated from the wet blank) inside the mold cavity, forcing it to quickly leave the mold cavity along the preset pipeline and enter the downstream gas-liquid separator.

[0038] In this embodiment of the invention, the vacuum suction unit is automatically activated after heating is completed, creating a high negative pressure environment within the mold cavity. This negative pressure environment accelerates the extraction rate of steam and evaporated moisture, significantly shortening the drying cycle. The vacuum suction unit is connected to the mold cavity via a vacuum pipeline. During the drying stage after heating and molding, it establishes and maintains a preset negative pressure environment within the mold cavity. Through its powerful suction action, it actively and rapidly extracts the mixture of residual heating steam and water vapor generated by the evaporation of the pulp blank from the mold cavity, driving the mixed gas along a preset path to the subsequent gas-liquid separator. This significantly accelerates the drying process of the blank and provides initial power for the medium flow and heat recovery cycle of the entire system.

[0039] The gas-liquid separator 105 has its inlet connected to the outlet of the vacuum suction unit 104 and is used to separate the water vapor mixture. A gas-liquid separator is a key device for the efficient and precise separation of water vapor mixtures extracted by a vacuum pumping unit. Separating liquid water from gases (mainly steam and air) in the mixture is a prerequisite for realizing two major cycles: water resource recovery and gas thermal energy recovery.

[0040] The embodiments of this invention employ a two-stage series separation design. It receives and processes a high-temperature, humid, saturated gas mixture from the mold cavity, removing entrained liquid water droplets and mist droplets as thoroughly as possible using physical methods, and outputting dry gas and clean condensate.

[0041] In this embodiment of the invention, the gas-liquid separator's inlet is connected to the outlet of a vacuum suction unit via a pipe, receiving and processing the water vapor mixture extracted by the vacuum suction unit. Its core function is to efficiently and thoroughly separate the liquid water and gas (mainly water vapor and a small amount of non-condensable gas) in the mixture through an internal physical separation mechanism. The separated liquid water is collected and directed to a condensate recovery system, while the separated gas is transported to a subsequent gas heat recovery loop. It is a key pretreatment unit for achieving media diversion, ensuring water resource recycling, and guaranteeing efficient and safe recovery of gas heat energy.

[0042] The gas heat recovery circuit 106 has its inlet connected to the gas outlet of the gas-liquid separator 105 and its outlet connected to the mold 103. It is used to compress and heat the separated gas and return it to the mold cavity as a supplementary heat source. The gas heat recovery loop is the core module for realizing energy recovery and recycling. The low-temperature humid gas that was originally intended to be discharged after being separated by the gas-liquid separator is converted into a high-quality heat source that can be directly used through "compression heating" and then reinjected into the production process.

[0043] It receives dry (or low-moisture) gas from the gas-liquid separator. The gas is preheated to ensure it enters the compressor in a superheated state, preventing condensation during compression. The high-temperature, high-pressure gas generated during compression is delivered back to the mold cavity via a dedicated pipeline equipped with a flow control valve for precise control. Parameters at the compressor outlet and in the mold cavity are monitored in real time, and the compressor speed and valve opening are dynamically adjusted to achieve precise heating.

[0044] In this embodiment of the invention, the inlet of the gas heat recovery loop is connected to the gas outlet of the gas-liquid separator via a pipeline, and the outlet is connected to the mold cavity of the mold via a hot gas pipeline equipped with a control valve. The core function of this loop is to receive and process the dried gas separated by the gas-liquid separator, and to perform adiabatic compression on the gas using an integrated high-efficiency gas compressor, significantly increasing its temperature and pressure, thereby converting the heat energy in the gas into directly usable heat energy. Finally, this high-temperature, high-pressure gas is used as a precisely controllable supplementary heat source and reinjected into the mold cavity to compensate for heat loss during the drying stage, maintain or optimize the process temperature field, and achieve active recovery and efficient reuse of waste heat energy.

[0045] The control device 107 is used to control the operation of the vacuum suction unit 104, the gas-liquid separator 105 and the gas heat recovery circuit 106.

[0046] In this embodiment of the invention, the control device serves as the intelligent control center, connected via electrical and signal lines to the vacuum suction unit, gas-liquid separator, and gas heat recovery circuit. Based on preset process logic and real-time sensor feedback, it coordinates, synchronizes, and precisely controls the start-up and shutdown duration of the vacuum suction unit, the separation process and status of the gas-liquid separator, and the compressor power and hot gas injection flow rate of the gas heat recovery circuit. This ensures that the three core functional units operate collaboratively at the correct timing (e.g., simultaneous start-up of vacuum suction and heat recovery) and optimal operating parameters, thereby guaranteeing the efficient, stable, and automated switching and operation of the entire mold steam circulation control system from "heating mode" to "drying-recovery mode."

[0047] In some embodiments, the gas-liquid separator 105 includes a primary gas-liquid separator and a secondary gas-liquid separator; The primary gas-liquid separator has a conical internal flow channel, which is used to initially separate the water vapor mixture and guide the initially separated liquid water to the water collection tank of the primary gas-liquid separator. In some embodiments, the inner wall surface of the primary gas-liquid separator is provided with a hydrophobic microstructure layer, the hydrophobic microstructure layer including a protrusion array and a flow guide groove; the water collection tank of the primary gas-liquid separator is provided with a one-way valve.

[0048] This invention employs a series connection of a primary gas-liquid separator (coarse separation) and a secondary gas-liquid separator (fine separation). The primary separation typically utilizes centrifugal separation or impingement flow principles, leveraging the density and inertia differences between droplets and gas to efficiently remove larger droplets and most of the liquid water. The secondary separation typically employs a high-efficiency demister (such as a wire mesh demister or a blade demister) or a condensing filter. Its principles include diffusion, interception, and collision, specifically designed to capture the tiny droplets remaining in the gas after primary separation, drying the gas to a very low water content.

[0049] The primary gas-liquid separator, as the first step in the gas-liquid separation process, is responsible for the initial and efficient mechanical separation of the high-temperature, high-humidity steam mixture from the mold, which may carry a large amount of liquid water. Its main objective is to quickly and reliably remove most of the liquid water from the mixture.

[0050] The wet steam mixture enters the upper cylindrical chamber of the separator at high velocity along the tangential direction, forced into high-speed rotation. Under strong centrifugal force, droplets and water mist, with densities much greater than gas, are thrown against the inner wall of the gas-liquid separator. The droplets impacting the inner wall converge to form a liquid film, which flows downward along the wall under gravity and eventually collects in the water collection tank at the bottom for discharge. The relatively dry gas, having separated most of the liquid, forms an upward internal vortex in the central region and exits from the central outlet pipe at the top, entering the secondary separator.

[0051] The extracted water vapor mixture is first transported to the primary gas-liquid separator. The primary gas-liquid separator adopts a biomimetic design of a lotus leaf superhydrophobic microstructure. A micron-level array of protrusions resembling lotus leaves is formed on the inner wall of the conical flow channel by laser engraving, ensuring an increased liquid film formation rate and reducing residual water droplets on the wall. At the same time, nano-level guide grooves are etched on the surface of the protrusions to form a guide path for the continuous liquid film. The diameter of the conical flow channel narrows from the inlet end to the outlet end. The flow velocity is increased by the channel contraction, which forces the water vapor mixture to make a circular motion in the conical flow channel, generating centrifugal force. The circular motion of the primary gas-liquid separator is naturally formed. Relying on the contraction and curvature of the conical flow channel, the liquid water is thrown towards the wall by centrifugal force. After contacting the nano-guide grooves, it quickly spreads into a continuous liquid film and then accurately flows into the water collection tank through the nano-guide grooves. The gas enters the secondary gas-liquid separator through the gas outlet of the primary gas-liquid separator.

[0052] In this embodiment of the invention, the core of the primary gas-liquid separator is a constricted flow channel with a specific taper. When the water vapor mixture enters this conical flow channel tangentially, the flow velocity increases significantly due to the decrease in the cross-sectional area of ​​the flow channel, thereby generating a strong centrifugal force field. This forces the liquid water in the mixture to be thrown against the inner wall of the flow channel, achieving initial inertial separation. To overcome the tendency of droplets to be re-entrained under vacuum negative pressure conditions and to further improve separation efficiency, the inner wall surface of the conical flow channel is provided with a biomimetic hydrophobic microstructure layer. This biomimetic hydrophobic microstructure layer consists of a regularly arranged array of micron-sized protrusions and nano-sized guide grooves formed on the surface of the protrusions. This design allows the liquid water thrown against the wall by centrifugal force to quickly spread into a continuous liquid film and be precisely and rapidly guided along the guide grooves to the water collection tank at the bottom of the primary gas-liquid separator.

[0053] To prevent gas backflow or liquid reflux under the pressure difference created by vacuuming, a one-way valve is specially installed at the inlet of the water collection tank. This one-way valve only allows the separated liquid water to flow into the water collection tank in one direction under the action of gravity and liquid film pressure, thereby ensuring the continuity and stability of the gas-liquid separation and liquid collection process in a dynamic negative pressure environment.

[0054] The secondary gas-liquid separator integrates a cyclone separation component and a gradient pore size filter component, which is used to receive the gas initially separated by the primary gas-liquid separator and further separate the gas to obtain the separated gas.

[0055] The core task of the secondary gas-liquid separator is to deeply remove the fine droplets and moisture remaining in the gas after separation in the primary gas-liquid separator, ensuring that the gas entering the gas heat recovery loop meets extremely low moisture content standards. The gas carrying fine droplets passes through a dense mesh layer woven from extremely fine metal or plastic fibers. The droplets are captured through physical interactions such as collision, interception, and diffusion with the fibers. When the condensed droplets become large enough, they detach from the mesh under gravity and drip down to the water collection tank at the bottom of the separator. After passing through the mesh layer, the liquid droplet content in the gas is reduced to an extremely low level, forming "dry gas" that can be used for subsequent compression.

[0056] The cyclone separator is a pretreatment unit of the secondary gas-liquid separator. Utilizing the centrifugal force field generated by high-speed rotation, it gathers gas from the primary gas-liquid separator, which has already removed most of the liquid water but still contains a large number of fine droplets, thus "enlarging" the tiny droplets that are difficult to filter directly. It is typically an independent cylindrical or conical cavity with fixed spiral guide vanes (static vortex generators) inside, or a special tangential inlet design to generate a rotating flow field. Gas enters the assembly at a certain velocity and, guided by the fixed guide vanes or tangential inlet, is forced to undergo high-speed spiral motion along the wall. Under the strong centrifugal force, the tiny droplets entrained in the gas are thrown towards the outer wall of the assembly. The larger droplets gathered on the wall form a liquid film, which, propelled by subsequent airflow and its own gravity, moves downstream or to a specific water collection area at the bottom of the assembly and is discharged. After cyclone pretreatment, the average droplet size in the gas increases, and the number concentration decreases, but the temperature and main components of the gas itself remain unchanged, before it enters the subsequent filtration assembly.

[0057] The gradient pore size filter assembly, located after the cyclone separator, employs multiple layers of filter media with varying pore sizes arranged in descending order to progressively intercept and deeply dry the gas pretreated by the cyclone. It typically consists of multiple independent filter screens or fiber filter elements stacked in series along the gas flow direction. A key feature is that the filtration precision (pore size or fiber spacing) of each layer increases progressively along the airflow direction. For example, the first layer is a coarse filter layer with a larger pore size (e.g., a 20μm metal mesh), the second layer is a medium-efficiency layer (e.g., a 5μm fiber felt), and the third layer is a high-efficiency fine filter layer (e.g., a 1μm or PTFE membrane).

[0058] First, larger droplets and a few unseparated solid particles remaining in the gas after cyclone pretreatment are intercepted. Medium-sized droplets that the coarse filter layer failed to intercept are captured. Smaller droplets are captured and aggregated through diffusion and interception. After the gas passes through the aforementioned gradient filtration layers, any entrained liquid water is completely removed, resulting in an extremely dry and clean output.

[0059] In this embodiment of the invention, the inlet of the secondary gas-liquid separator is connected to the gas outlet of the primary gas-liquid separator. It receives the pre-separated gas, which has had most of its liquid water removed but still contains fine droplets, after separation by the primary gas-liquid separator, and performs deep fine separation on the gas. Internally, it adopts a modular integrated design, sequentially integrating a cyclone separation component and a gradient pore size filter component along the gas flow direction. The gas first enters the cyclone separation component. In the forced cyclone field, the remaining fine droplets move towards the wall due to centrifugal force and collide and aggregate, forming larger droplets that are then initially removed. Subsequently, the gas enters the downstream gradient pore size filter component. This component consists of multiple layers of filter media with progressively smaller pore sizes along the airflow direction. Through a gradient interception mechanism, it performs final fine filtration on the gas pre-treated by the cyclone, thoroughly removing residual droplets, thereby outputting dried and separated gas with extremely low water content that meets the requirements for compression heating.

[0060] In some embodiments, the secondary gas-liquid separator includes a gas flow channel; the cyclone separation component is disposed upstream of the gas flow channel, and the gradient pore size filter component is disposed downstream of the gas flow channel; The cyclone separation component is used to form a stable vortex of gas initially separated from the first-stage gas-liquid separator into droplets, and to cause the droplets to accumulate on the inner wall of the second-stage gas-liquid separator. The gradient aperture filter assembly includes multiple layers of metal wire mesh stacked sequentially along the gas flow direction. The aperture of each layer of metal wire mesh decreases progressively along the gas flow direction, and is used to filter the liquid droplets that accumulate on the inner wall of the secondary gas-liquid separator to obtain separated gas.

[0061] The secondary gas-liquid separator employs a combination of a three-layer stainless steel wire mesh gradient pore structure and a cyclone focusing filter element. The cyclone focusing filter element features integrated spiral guide ribs on its inner wall and a guide plate at the gas inlet. The guide plate deflects the direct airflow into a spiral trajectory, preventing gas from directly impacting the filter element and causing droplets to be bounced back into the airflow. The three-layer stainless steel wire mesh gradient pore structure consists of three layers of stainless steel wire mesh stacked sequentially: the first layer has a pore size of 5μm, used to intercept water droplets with a diameter ≥5μm; the second layer has a pore size of 1μm, used to intercept water droplets with a diameter 1~5μm; and the third layer has a pore size of 0.1μm, used to intercept mist-like water droplets with a diameter ≤1μm. Gas passes through the guide plate and cyclone focusing filter element, where the spiral guide ribs force the formation of a stable vortex field. This causes the mist-like water droplets to spirally focus along the filter element's wall under centrifugal force, subsequently entering the gradient pore mesh layer. Through a micron-level droplet capture chain mechanism, a high droplet interception rate is achieved. Swirling focusing, as a pretreatment optimizer, reshapes the droplet size distribution into a narrow range that can be processed by the wire mesh.

[0062] In this embodiment of the invention, the secondary gas-liquid separator includes a gas flow channel; a cyclone separation component is disposed upstream of the gas flow channel, and a gradient aperture filter component is disposed downstream of the gas flow channel, forming a series separation process of "dynamic cyclone aggregation followed by static gradient interception".

[0063] The cyclone separation component forces the initially separated gas from the primary gas-liquid separator into a stable vortex. In this vortex field, the fine droplets entrained in the gas are thrown towards the inner wall of the secondary gas-liquid separator by centrifugal force, where they collide and aggregate to form larger droplets, thus completing the initial removal of droplets and pretreatment to increase particle size.

[0064] Subsequently, the gas, carrying droplets that were not completely removed and those that may have been re-entered from the wall, enters the downstream gradient pore size filter assembly. This assembly comprises multiple layers of metal wire mesh stacked sequentially along the gas flow direction, with the pore size of each layer decreasing progressively along the flow direction to create a pore size gradient. This gradient filtration precisely intercepts and filters the gas and its accompanying droplets: the larger pores upstream intercept larger droplets, while the smaller pores downstream intercept even finer droplets, ultimately achieving near-complete removal of the droplets and yielding dry, clean, separated gas suitable for compression heating.

[0065] Reference Figure 2 This diagram illustrates the separation process of a two-stage gas-liquid separator in a mold steam circulation control system according to an embodiment of the present invention. Figure 2 The demonstration showcases a two-stage gas-liquid separation process: First, the gas, after preliminary treatment in the primary gas-liquid separator, enters the secondary gas-liquid separator. In the secondary separator, the gas undergoes centrifugal swirling treatment via a cyclone separator, causing droplets to aggregate and initially separate. Subsequently, the gas passes sequentially through the first, second, and third layers of a gradient pore size filter assembly, achieving precise interception through progressively smaller pore sizes, ultimately yielding highly dry gas. Finally, this dried gas enters a compressor for compression and heating, transforming it into a high-temperature heat source suitable for supplemental heating. The entire process achieves highly efficient gas-liquid separation and active energy recovery.

[0066] In some embodiments, a differential pressure sensor is provided between the inlet and outlet of the secondary gas-liquid separator to monitor the pressure difference between the inlet and outlet of the secondary gas-liquid separator, and to issue an alarm when the pressure difference exceeds a preset differential pressure threshold.

[0067] Differential pressure sensors are components for condition monitoring and intelligent diagnosis. By measuring the pressure difference between the two ends of key components or pipe sections in real time, they convert the physical state of the system into a quantifiable electrical signal, providing the control system with the core basis for judging the health status and performance degradation of the equipment.

[0068] For the filter components of a two-stage gas-liquid separator, as operating time increases, the trapped impurities lead to increased flow resistance and a rise in the inlet and outlet pressure difference. By setting a reasonable differential pressure alarm threshold, the system can automatically issue a maintenance warning (such as an audible and visual alarm or a message sent to the control center) when the differential pressure reaches this threshold, prompting operators to clean or replace the filter element. This upgrades traditional periodic maintenance (which may be too early or too late) to precise condition-based maintenance, avoiding both decreased separation efficiency or compressor risks due to untimely filter element replacement and unnecessary premature maintenance, thus saving costs.

[0069] In this embodiment of the invention, a differential pressure sensor is connected across the pipeline between the gas inlet and gas outlet of the secondary gas-liquid separator. This differential pressure sensor monitors the difference between the inlet and outlet pressures of the secondary gas-liquid separator in real time. The monitored differential pressure data is transmitted to a control device in real time. The control device has a preset differential pressure threshold related to the performance degradation and blockage degree of the separator. When the real-time monitored differential pressure exceeds the preset threshold, the control device determines that the separator (especially the gradient pore size filter component) is severely blocked and the flow resistance is too high, and then triggers an alarm signal to prompt the operator to perform necessary inspections, cleaning, or filter replacement of the secondary gas-liquid separator. This achieves predictive maintenance based on the actual condition of the equipment, ensuring separation efficiency and long-term stable operation of the system.

[0070] In some embodiments, the gas heat recovery circuit 106 includes: A gas superheater, with its inlet connected to the outlet of the gas-liquid separator, is used to superheat the separated gas. A gas compressor, with its inlet connected to the outlet of the gas superheater, is used to perform adiabatic compression on the superheated gas. A hot gas injection pipeline is used to connect the outlet of the gas compressor to the mold cavity of the mold, and is used to inject gas that has been adiabatically compressed into the mold cavity.

[0071] The gas superheater is a key pretreatment device in the gas heat recovery loop, located between the gas-liquid separator outlet and the gas compressor inlet. Its main function is to provide additional heating to the "dry gas" entering the compressor, ensuring it is in a definitively superheated state to prevent harmful condensation during compression. It receives dry gas from the secondary gas-liquid separator and provides controlled additional heating to raise its temperature significantly and stably above its saturation temperature at its current pressure. For example, heating the gas from 30°C (potentially close to saturation) to 50°C or higher. It then outputs definitively superheated gas to the compressor inlet.

[0072] A gas compressor performs work on pretreated gas, compressing it and actively upgrading low-grade heat energy (low-temperature gas) into directly usable high-grade heat energy (high-temperature, high-pressure gas). The compressor performs adiabatic or near-adiabatic compression on the gas, directly and efficiently converting the work done on the gas into an increase in its internal energy, manifested as a significant simultaneous increase in both pressure (P) and temperature (T). For example, it can compress dry air at 30°C and normal pressure to 0.3 MPa.

[0073] The hot gas injection pipeline is a dedicated delivery channel connecting the outlet of the gas heat recovery circuit to the mold cavity. It is responsible for delivering the high-temperature, high-pressure supplementary heat source generated by the compressor to the location requiring heat. It includes a proportional or electrically adjustable valve for precisely controlling the flow rate of the hot gas injected into the mold, serving as the actuator for accurate temperature control. Temperature and pressure sensors are installed to monitor the status of the injected gas in real time and provide feedback.

[0074] The condensed liquid water after separation is collected in a collection tank, filtered simply, and then recycled back to the steam boiler as secondary heating feedwater. This circulating water system saves fresh water consumption and reduces boiler blowdown costs. The dried gas after secondary separation is not discarded but reused through the heating action of a centrifugal compressor: after entering the centrifugal compressor, the gas undergoes adiabatic compression, and the high-speed rotating impeller performs work on the gas, converting mechanical energy into internal energy to generate heat. This heat is then transported to the mold cavity to provide supplementary heating. This heat recovery mechanism improves the overall energy utilization rate of the system, effectively converting waste heat that would otherwise be discharged into an effective heat source, significantly reducing energy consumption per unit product. After separation by the secondary gas-liquid separator, the gas should be nearly dry but may contain a small amount of water vapor. A heater is added before the compressor to ensure the gas is overheated and prevent condensation.

[0075] In this embodiment of the invention, the gas heat recovery circuit 16 includes, in sequence along the gas flow direction, a gas superheater, a gas compressor, and a hot gas injection pipeline, which are connected in series to form a complete gas processing and energy upgrade module. The inlet of the gas superheater is connected to the gas outlet of the gas-liquid separator, providing controllable supplementary heating to the gas separated by the gas-liquid separator, stabilizing its temperature to a clearly defined superheated state, thereby eliminating any trace amounts of liquid water that may remain in the gas.

[0076] The gas compressor inlet is connected to the outlet of the gas superheater, receiving and compressing the superheated gas from the gas superheater. The gas compressor performs adiabatic compression work on the gas, efficiently converting the input electrical or mechanical energy into the internal energy of the gas, causing its pressure and temperature to increase significantly at the same time, thereby upgrading low-grade heat energy into a medium- and high-temperature heat source that can be directly used. The inlet of the hot gas injection pipeline is connected to the outlet of the gas compressor, and the outlet is connected to the mold cavity of the mold. The high-temperature and high-pressure gas generated by the compressor after adiabatic compression is used as a controllable supplementary heat source and is directly and accurately delivered and injected into the mold cavity to compensate for the heat loss during the drying stage and maintain or optimize the process temperature.

[0077] In some embodiments, the output of the control device 107 is connected to a flow regulating valve disposed in the hot gas injection pipeline 106, for obtaining the temperature and pressure inside the mold cavity and the gas compressor, and adjusting the opening of the flow regulating valve according to the temperature and the pressure.

[0078] The flow regulating valve installed on the hot gas injection pipeline is the flow controller of the gas heat recovery loop. Receiving commands from the control system, it adjusts the flow rate of the high-temperature gas injected into the mold cavity in real time and precisely by changing the flow channel opening, thereby achieving closed-loop control of the supplementary heat input rate.

[0079] In this embodiment of the invention, the output of the control device is connected to a flow regulating valve installed on the hot gas injection pipeline via a control signal line, forming a closed-loop control circuit. The input of the control device is connected to temperature and pressure sensors installed inside the mold cavity, as well as temperature and pressure sensors installed at or near the outlet of the gas compressor, for real-time acquisition of feedback signals reflecting the thermal state of the mold and the state of the compressed gas.

[0080] The control device has a pre-set control algorithm that processes the acquired mold cavity temperature and pressure, as well as the compressed gas outlet temperature and pressure, in real time. By comparing and calculating the feedback signal with the process setpoint, the control device dynamically calculates the optimal supplementary hot gas flow rate required to maintain the best process temperature and generates a corresponding control signal. The control signal is sent to the flow regulating valve in real time to achieve closed-loop regulation of the hot gas flow rate injected into the mold cavity, ultimately ensuring real-time and precise matching between the supplementary heat and process requirements, maintaining stable mold temperature, and optimizing the drying process.

[0081] In some embodiments, the control device 107 is used to acquire mold parameters, determine the vacuum suction duration of the vacuum suction unit 104 according to the mold parameters, and control the vacuum suction unit 104 to perform vacuum suction on the mold cavity according to the vacuum suction duration; the mold parameters include at least one of the mold size, temperature, weight and initial moisture content.

[0082] In this embodiment of the invention, the control device acquires or receives mold parameters related to the current production task. The mold parameters are key variables characterizing heat and mass exchange conditions, including at least one of the following: mold size, initial temperature of the mold cavity, weight of the wet pulp blank to be formed, and initial moisture content of the wet blank. The acquired mold parameters are used as input variables, and a built-in algorithm performs real-time calculations to dynamically estimate the optimal vacuum suction time required to effectively dry the current mold. Subsequently, the control device generates precise timing control commands based on the calculated vacuum suction time to control the start and stop of the vacuum suction unit: starting the vacuum suction unit at the beginning of the hot-press drying stage and shutting it off after the calculated suction time is reached. This mechanism achieves personalized and adaptive control of the vacuum drying process, avoiding energy waste or insufficient drying caused by fixed durations, and maximizing production efficiency and energy efficiency while ensuring product quality.

[0083] Reference Figure 3 The diagram illustrates a steam circulation process of a mold steam circulation control system according to an embodiment of the present invention. Figure 3 The demonstration showcases the core workflow of the mold steam circulation control system: water inside the steam boiler is heated by electric heating elements to generate high-temperature steam, which is then transported to the mold for heating. After heating and molding, the vacuum suction unit activates, extracting the water-vapor mixture from the mold cavity and conveying it to a primary gas-liquid separator for initial separation. The separated condensate is recovered, while the gas enters a secondary gas-liquid separator for further separation. The dried gas produced after secondary separation enters a gas heat recovery loop, where it is converted into a high-temperature supplementary heat source through a compression heating process, ultimately returning to the system for reuse. The separated condensate is also recovered along with the gas. The entire process achieves a closed-loop circulation and efficient utilization of steam, water, and heat energy.

[0084] This invention discloses a mold steam circulation control system, method, electronic device, and storage medium, comprising: an electric heating element for heating a steam boiler; a steam boiler for generating heating steam through the electric heating element; a mold with an internal mold cavity for receiving heating steam for heating and molding; a vacuum suction unit connected to the mold cavity for extracting a water vapor mixture from the mold cavity; a gas-liquid separator with its inlet connected to the outlet of the vacuum suction unit for separating the water vapor mixture; a gas heat recovery circuit with its inlet connected to the gas outlet of the gas-liquid separator and its outlet connected to the mold for compressing and heating the separated gas and returning it to the mold cavity as a supplementary heat source; and a control device for controlling the operation of the vacuum suction unit, the gas-liquid separator, and the gas heat recovery circuit. By using an electric heating element as the heat source for the steam boiler, zero carbon emissions are achieved from the source during the heating process, avoiding emission problems caused by incomplete combustion. By adding a gas heat recovery circuit, the separated gas is compressed and heated to become a high-temperature supplementary heat source and reinjected into the mold cavity, thus converting the originally waste heat into effective process heat energy and realizing the recycling of heat within the system.

[0085] It should be noted that, for the sake of simplicity, the system embodiments are described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.

[0086] Reference Figure 4 This diagram illustrates a flowchart of a mold steam circulation control method according to an embodiment of the present invention, applicable to a mold steam circulation control system as described in any of the above claims. The method specifically includes the following steps: Step 201: The steam boiler is heated by the electric heating element to generate steam, and the steam is delivered to the mold cavity of the mold. Step 202: Vacuum suction is performed on the mold cavity using the vacuum suction unit; Step 203: The water vapor mixture obtained by vacuum suction through the vacuum suction unit is separated into separated gas by the gas-liquid separator. Step 204: The separated gas is compressed and heated through a gas heat recovery circuit, and the compressed and heated gas is injected into the mold cavity.

[0087] In some embodiments, the gas-liquid separator includes a primary gas-liquid separator and a secondary gas-liquid separator; the process of separating the water vapor mixture obtained by vacuum suction from the vacuum suction unit through the gas-liquid separator to obtain the separated gas includes: The water vapor mixture is initially separated by the first-stage gas-liquid separator, and the liquid water obtained from the initial separation is guided to the water collection tank of the first-stage gas-liquid separator. The secondary gas-liquid separator receives the gas that has been initially separated from the primary gas-liquid separator and performs a second separation to obtain the separated gas.

[0088] In some embodiments, the secondary gas-liquid separator includes a cyclone separation component and a gradient pore size filter component; the step of receiving the gas initially separated from the primary gas-liquid separator through the secondary gas-liquid separator and further separating the gas to obtain the separated gas includes: The cyclone separation component forms a stable vortex from the gas initially separated by the first-stage gas-liquid separator, which then forms droplets and causes the droplets to accumulate on the inner wall of the second-stage gas-liquid separator. The liquid droplets that accumulate on the inner wall of the secondary gas-liquid separator are filtered through the multi-layer metal wire mesh of the gradient pore size filter assembly to obtain the separated gas.

[0089] In some embodiments, a differential pressure sensor is provided between the inlet and outlet of the secondary gas-liquid separator; the method further includes: The differential pressure sensor monitors the pressure difference between the inlet and outlet of the secondary gas-liquid separator, and an alarm is triggered when the pressure difference exceeds a preset differential pressure threshold.

[0090] In some embodiments, the gas heat recovery circuit includes a gas superheater, a gas compressor, and a hot gas injection pipeline; the step of compressing and heating the separated gas through the gas heat recovery circuit includes: The separated gas is superheated by the gas superheater. The superheated gas is adiabatically compressed using the gas compressor. The gas, after being adiabatic and compressed, is injected into the mold cavity through the hot gas injection pipeline.

[0091] In some embodiments, the method further includes: The temperature and pressure inside the mold cavity and the gas compressor are obtained; The opening degree of the flow regulating valve of the hot gas injection pipeline is determined based on the temperature and pressure.

[0092] In some embodiments, the vacuum suction unit for vacuum suction of the mold cavity includes: Obtain the mold parameters; the mold parameters include at least one of the following: mold size, temperature, weight, and initial moisture content; The vacuum suction duration of the vacuum suction unit is determined based on the mold parameters. The vacuum suction unit is controlled to perform vacuum suction on the mold cavity according to the vacuum suction duration.

[0093] As the method embodiments are basically similar to the system embodiments, they are described in a relatively simple manner. For relevant details, please refer to the description of the method embodiments.

[0094] This invention also provides an electronic device, including: a processor, a memory, and a computer program stored in the memory and capable of running on the processor. When the computer program is executed by the processor, it implements the various processes of the above-described mold steam circulation control method embodiment and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0095] This invention also provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described mold steam circulation control method embodiment and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0096] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0097] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present invention is not limited to performing functions in the order shown or discussed. It may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0098] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0099] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A mold steam circulation control system, characterized in that, include: Electric heating elements are used to heat steam boilers; A steam boiler is used to generate heating steam by using electric heating elements; The mold has an internal cavity for receiving the heating steam for heating and molding. A vacuum suction unit, connected to the mold cavity, is used to extract the water vapor mixture inside the mold cavity; A gas-liquid separator, with its inlet connected to the outlet of the vacuum suction unit, is used to separate the water vapor mixture; The gas heat recovery circuit has its inlet connected to the gas outlet of the gas-liquid separator and its outlet connected to the mold. It is used to compress and heat the separated gas and return it to the mold cavity as a supplementary heat source. A control device is used to control the operation of the vacuum suction unit, the gas-liquid separator, and the gas heat recovery circuit.

2. The mold steam circulation control system according to claim 1, characterized in that, The gas-liquid separator includes a primary gas-liquid separator and a secondary gas-liquid separator; The primary gas-liquid separator has a conical internal flow channel, which is used to initially separate the water vapor mixture and guide the initially separated liquid water to the water collection tank of the primary gas-liquid separator. The secondary gas-liquid separator integrates a cyclone separation component and a gradient pore size filter component, which is used to receive the gas initially separated by the primary gas-liquid separator and further separate the gas to obtain the separated gas.

3. The mold steam circulation control system according to claim 2, characterized in that, The inner wall surface of the primary gas-liquid separator is provided with a hydrophobic microstructure layer, which includes a protrusion array and a flow guide groove; the water collection tank of the primary gas-liquid separator is equipped with a one-way valve.

4. The mold steam circulation control system according to claim 2, characterized in that, The secondary gas-liquid separator includes a gas flow channel; the cyclone separation component is disposed upstream of the gas flow channel, and the gradient pore size filter component is disposed downstream of the gas flow channel. The cyclone separation component is used to form a stable vortex of gas initially separated from the first-stage gas-liquid separator into droplets, and to cause the droplets to accumulate on the inner wall of the second-stage gas-liquid separator. The gradient aperture filter assembly includes multiple layers of metal wire mesh stacked sequentially along the gas flow direction. The aperture of each layer of metal wire mesh decreases progressively along the gas flow direction, and is used to filter the liquid droplets that accumulate on the inner wall of the secondary gas-liquid separator to obtain separated gas.

5. The mold steam circulation control system according to claim 4, characterized in that, A differential pressure sensor is installed between the inlet and outlet of the secondary gas-liquid separator to monitor the pressure difference between the inlet and outlet of the secondary gas-liquid separator. An alarm is issued when the pressure difference exceeds a preset differential pressure threshold.

6. The mold steam circulation control system according to claim 1, characterized in that, The gas heat recovery circuit includes: A gas superheater, with its inlet connected to the outlet of the gas-liquid separator, is used to superheat the separated gas. A gas compressor, with its inlet connected to the outlet of the gas superheater, is used to perform adiabatic compression on the superheated gas. A hot gas injection pipeline is used to connect the outlet of the gas compressor to the mold cavity of the mold, and is used to inject the gas after adiabatic compression into the mold cavity.

7. The mold steam circulation control system according to claim 6, characterized in that, The output of the control device is connected to a flow regulating valve installed in the hot gas injection pipeline, for obtaining the temperature and pressure inside the mold cavity and the gas compressor, and adjusting the opening of the flow regulating valve according to the temperature and pressure.

8. The mold steam circulation control system according to claim 1, characterized in that, The control device is used to acquire mold parameters, determine the vacuum suction duration of the vacuum suction unit based on the mold parameters, and control the vacuum suction unit to perform vacuum suction on the mold cavity based on the vacuum suction duration; the mold parameters include at least one of the mold size, temperature, weight, and initial moisture content.

9. A method for controlling steam circulation in a mold, characterized in that, The method, applied to a mold steam circulation control system as described in any one of claims 1 to 8, comprises: The electric heating element heats the steam boiler to generate steam, and the steam is then delivered to the mold cavity of the mold. The mold cavity is vacuumed using the vacuum suction unit. The gas-liquid separator separates the water vapor mixture obtained by vacuum suction from the vacuum suction unit to obtain the separated gas. The separated gas is compressed and heated through a gas heat recovery circuit, and the compressed and heated gas is then injected into the mold cavity.

10. The mold steam circulation control method according to claim 9, characterized in that, The gas-liquid separator includes a primary gas-liquid separator and a secondary gas-liquid separator; the process of separating the water vapor mixture obtained by vacuum suction from the vacuum suction unit through the gas-liquid separator to obtain the separated gas includes: The water vapor mixture is initially separated by the first-stage gas-liquid separator, and the liquid water obtained from the initial separation is guided to the water collection tank of the first-stage gas-liquid separator. The secondary gas-liquid separator receives the gas that has been initially separated from the primary gas-liquid separator and performs a second separation to obtain the separated gas.

11. The mold steam circulation control method according to claim 10, characterized in that, The secondary gas-liquid separator includes a cyclone separation component and a gradient pore size filter component; the process of receiving the gas initially separated by the primary gas-liquid separator through the secondary gas-liquid separator and further separating the gas to obtain the separated gas includes: The cyclone separation component forms a stable vortex from the gas initially separated by the first-stage gas-liquid separator, which then forms droplets and causes the droplets to accumulate on the inner wall of the second-stage gas-liquid separator. The liquid droplets that accumulate on the inner wall of the secondary gas-liquid separator are filtered through the multi-layer metal wire mesh of the gradient pore size filter assembly to obtain the separated gas.

12. The mold steam circulation control method according to claim 10, characterized in that, A differential pressure sensor is installed between the inlet and outlet of the secondary gas-liquid separator; the method further includes: The differential pressure sensor monitors the pressure difference between the inlet and outlet of the secondary gas-liquid separator, and an alarm is triggered when the pressure difference exceeds a preset differential pressure threshold.

13. The mold steam circulation control method according to claim 9, characterized in that, The gas heat recovery circuit includes a gas superheater, a gas compressor, and a hot gas injection pipeline; the process of compressing and heating the separated gas through the gas heat recovery circuit includes: The separated gas is superheated by the gas superheater. The superheated gas is adiabatically compressed using the gas compressor. The gas, after being adiabatically compressed, is injected into the mold cavity through the hot gas injection pipeline.

14. The mold steam circulation control method according to claim 13, characterized in that, The method further includes: The temperature and pressure inside the mold cavity and the gas compressor are obtained; The opening degree of the flow regulating valve of the hot gas injection pipeline is determined based on the temperature and pressure.

15. The mold steam circulation control method according to claim 9, characterized in that, The process of vacuuming the mold cavity using the vacuum suction unit includes: Obtain the mold parameters; the mold parameters include at least one of the following: mold size, temperature, weight, and initial moisture content; The vacuum suction duration of the vacuum suction unit is determined based on the mold parameters. The vacuum suction unit is controlled to perform vacuum suction on the mold cavity according to the vacuum suction duration.

16. An electronic device, characterized in that, include: A processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the mold steam circulation control method as described in any one of claims 9-15.

17. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the steps of the mold steam circulation control method as described in any one of claims 9-15.

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