Liquid treatment system based on steam coupling pressurization and operation method

Abstract

The invention discloses a liquid treatment system based on steam coupling pressurization and an operation method, and the system comprises a liquid treatment module which comprises at least one liquid storage device; the gas control module comprises a communication valve pipe system communicated with a communication gas source and a pressure increasing valve pipe system communicated with a pressure increasing gas source, and the communication valve pipe system and the pressure increasing valve pipe system are in decoupling connection with the liquid storage device; the fluid conveying module comprises a liquid inlet valve pipe system used for inputting liquid to be pressurized into the liquid storage device and an outlet valve pipe system used for outputting pressurized liquid from the liquid storage device; and the dynamic pressure management module is used for coordinating and controlling the opening and closing states of the communicating valve piping system, the pressure increasing valve piping system, the liquid inlet valve piping system and the outlet valve piping system. The thought that the system is decoupled into a plurality of independent operation modes at the same time is adopted, the high-low pressure environment which cannot coexist is disassembled into independent spaces for synchronous operation, and periodic stagnation of the technological process is thoroughly eliminated while it is maintained that a booster pump continuously sucks a liquid working medium.

Description

[0001] A liquid processing system based on steam coupling pressurization and operation method Technical Field

[0002] The present invention relates to the technical field of liquid treatment, and in particular to a liquid treatment system based on steam coupling pressurization and an operating method thereof. Background Art

[0003] In the field of industrial water treatment (especially in scenarios such as seawater desalination and high-purity water production), liquid pressure boosting systems are the power source for core equipment such as reverse osmosis membrane modules and ion exchangers. Traditional water and wastewater pressure boosting treatment technologies have the following drawbacks: 1. Existing systems typically use a single liquid storage device to integrate liquid collection and pressurized output functions. When the storage tank needs to be replenished with liquid to be treated, a low-pressure environment must be established to drive the fluid inflow, and pressurized steam cannot be injected at this time. However, when high-pressure steam is injected to increase the pressure in the tank, the liquid replenishment channel must be closed. This physical mutual exclusivity of gas-liquid two-phase operation forces the system to periodically interrupt operation, causing downstream equipment such as reverse osmosis membrane modules to frequently start and stop, significantly increasing equipment wear and reducing process efficiency. 2. In the solution of connecting multiple liquid storage containers in parallel, first, there is a lack of a dynamic pressure balance mechanism between different liquid storage devices. When the system switches the gas source and liquid flow path between containers, the pipeline pressure fluctuates violently, resulting in unstable pressure of the downstream membrane group. Secondly, the independent control logic of each container makes it impossible to accurately coordinate the liquid level status. When a container is drained to a low level, if other containers have not yet completed the filling preparation, it will cause a momentary vacuum to form at the suction end of the booster pump, inducing the risk of cavitation and subsequent chain failure of equipment.

[0004] 3. In industrial water / wastewater treatment scenarios, pressurized high-temperature liquid contains considerable thermal energy, and the pressurization process consumes a large amount of steam energy. In existing technologies, steam heat sources are typically supplied independently (e.g., from external boilers), while the heat energy from the pressurized high-temperature liquid is directly discarded. This disconnect between energy input and recovery results in double waste—consistently consuming external energy to generate steam while failing to utilize the system's own waste heat, resulting in overall low energy efficiency. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a liquid treatment system and operation method based on steam-coupled pressurization to solve the problems of lack of continuity in water treatment processes and low energy efficiency in traditional technologies.

[0006] In order to solve the above problems, the technical solutions adopted by the present invention are as follows: In a first aspect, the present invention provides a liquid processing system based on steam-coupled pressurization, comprising: a liquid processing module comprising at least one liquid storage device; A gas control module, comprising a connecting valve piping system connected to a connecting gas source and a boosting valve piping system connected to a boosting gas source, wherein the connecting valve piping system and the boosting valve piping system are respectively connected to the liquid storage device in a decoupling manner; a fluid delivery module, comprising an inlet valve piping system for inputting the pressurized liquid into the liquid storage device and an outlet valve piping system for outputting the pressurized liquid from the liquid storage device; The dynamic pressure management module is used to coordinate and control the opening and closing states of the connecting valve piping system, the boost valve piping system, the liquid inlet valve piping system and the outlet valve piping system.

[0007] In some embodiments, the dynamic pressure management module is configured to cause the gas control module and the fluid delivery module to periodically execute: (a) During the liquid collection phase: selectively open the connecting valve piping system and the liquid inlet valve piping system to supply the liquid to be pressurized into the target liquid storage device, and close the boosting valve piping system and the outlet valve piping system; (b) During the pressure increase phase: selectively open the boost valve piping system, and close the outlet valve piping system, the connecting valve piping system, and the inlet valve piping system; (c) Liquid discharge stage: selectively open the outlet valve piping system and the boost valve piping system to output the pressurized liquid from the liquid storage device, and close the connecting valve piping system and the liquid inlet valve piping system.

[0008] In some embodiments, the dynamic pressure management module is configured to cause the gas control module and the fluid delivery module to periodically execute: (a) During the liquid collection phase: selectively open the connecting valve piping system and the liquid inlet valve piping system to supply the liquid to be pressurized into the target liquid storage device, and close the boosting valve piping system and the outlet valve piping system; (b) During the pressure increase phase: the boost valve piping system and the outlet valve piping system are selectively opened to output the pressurized liquid from the liquid storage device, and the connecting valve piping system and the liquid inlet valve piping system are closed.

[0009] In some embodiments, a booster pump is further included, and the booster pump is coupled to the outlet valve pipe system for performing a secondary pressure boost on the pressurized liquid.

[0010] In some embodiments, a liquid level detection unit is provided in the liquid storage device, and the liquid level detection unit is used to detect the current liquid level signal in the liquid storage device in real time.

[0011] In some embodiments, the pressure of the boosting gas source is greater than the pressure of the liquid to be boosted, but lower than the pressure of the liquid after being boosted by the boosting pump.

[0012] In some embodiments, the pressurized gas source is the vapor of the liquid to be pressurized or other gas that does not chemically react with the liquid / vapor.

[0013] In some embodiments, the liquid to be pressurized is water.

[0014] In some embodiments, the pressurized gas source is steam generated by directly or indirectly heating and boiling the pressurized liquid formed after the liquid to be pressurized is pressurized.

[0015] In some embodiments, the pressurized gas source is a pressurized liquid formed after the liquid to be pressurized is pressurized, and steam is generated after being directly or indirectly heated to boiling, and then the steam is reduced in pressure to a target pressure after a depressurization process.

[0016] In some embodiments, the number of the liquid storage devices is two or more, and the multiple liquid storage devices share the same interconnecting air source, pressurized air source, liquid to be pressurized, and booster pump.

[0017] In some embodiments, the system further includes a state switching control module, wherein the state switching control module is configured to: At any time, maintaining at least one liquid storage device in the liquid discharge stage so that the booster pump operates continuously; According to the liquid level signal of each liquid storage device, different liquid storage devices are triggered alternately to switch to the liquid collection stage, the pressure increase stage and the liquid discharge stage.

[0018] In a second aspect, the present invention provides an operating method for a liquid treatment system based on steam-coupled pressurization as described above, comprising: S100, closing the boost valve and the outlet valve, opening the connecting valve and the liquid inlet valve, and allowing the liquid storage device to collect liquid until the target liquid level is reached; S200, closing the connecting valve, the liquid inlet valve, and the outlet valve, and opening the boost valve to increase the pressure of the liquid storage device; S300, close the connecting valve and the liquid inlet valve, open the outlet valve and the boost valve, and discharge the liquid; S400: When the pressure of the boosting gas source is insufficient, the boosting liquid is drawn from the liquid storage device by a boosting pump, and the boosting liquid is pressurized a second time.

[0019] In some embodiments, the pressure of the communication gas source is not higher than the sum of the first pressure P01 and the second pressure P02; The first pressure P01 is the pressure of the free pressure surface of the liquid to be pressurized; The second pressure P02 is the gravitational pressure of the liquid to be pressurized formed due to the height difference between the free surface of the liquid to be pressurized and the free surface of the liquid storage device.

[0020] In some embodiments, the pressure of the boosting gas source is greater than the pressure of the liquid to be boosted, but lower than the pressure of the liquid after being boosted by the boosting pump.

[0021] In some embodiments, it further includes: Detecting the current liquid level signal in the liquid storage device in real time and comparing the liquid level signal with a preset liquid level threshold; If the current liquid level signal is greater than the preset high liquid level threshold, close the liquid inlet valve and the connecting valve corresponding to the current liquid storage device; If the current liquid level signal is less than or equal to the preset low liquid level threshold, the boost valve and outlet valve corresponding to the current liquid storage device are closed.

[0022] In some embodiments, it further includes: Setting the preset low liquid level threshold, wherein the preset low liquid level threshold is configured to be no lower than the corresponding liquid level of the water inlet connected to the booster pump and the water storage device; The preset high liquid level threshold is set, and the preset high liquid level threshold is configured to be no higher than the liquid level corresponding to the installation height of the connecting valve.

[0023] In some embodiments, when the number of the liquid storage devices is two or more, the method further comprises: At any time, maintaining at least one liquid storage device in the liquid discharge stage so that the booster pump operates continuously; According to the liquid level signal of each liquid storage device, different liquid storage devices are triggered alternately to switch to the liquid collection stage, the pressure increase stage and the liquid discharge stage.

[0024] In some embodiments, it further includes: When the current liquid level signal of one of the liquid storage devices is less than a preset low liquid level threshold, the corresponding boosting valve and outlet valve of at least one of the remaining liquid storage devices are synchronously opened; The outlet valve piping ensures that the inlet of the booster pump is always connected to at least one liquid storage device with an open outlet valve.

[0025] In some embodiments, the generation path of the pressurized gas source includes: The liquid to be boosted enters the heat exchanger after being pressurized by the booster pump to form steam or mixed gas; The steam or mixed gas is decompressed to a target pressure through a pressure reducing valve; The decompressed steam or mixed gas is reinjected into the pressurized gas source pipeline.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention constructs a coupling mechanism of dynamic pressure field reconstruction and thermodynamic self-circulation, fundamentally solving the irreconcilable contradiction between pressurization and energy recovery in the water treatment process. By deconstructing the spatial limitations of a single container in the traditional system, a phase-staggered operating sequence is established in the physically isolated space of two or more liquid storage devices: when one of the liquid storage devices injects high-pressure steam through the boost valve piping system to promote liquid output, the other liquid storage device can synchronously open the connecting valve piping system to construct a low-pressure field to absorb the liquid to be treated. This idea of ​​decoupling the system into multiple independent operations at the same time, disassembling the high and low pressure environments that cannot coexist into independent spaces for synchronous operation, while maintaining the continuous suction of liquid working fluid by the boost pump, completely gets rid of the periodic stagnation of the process flow.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention is further described with reference to the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative effort.

[0029] Figure 1 A schematic structural diagram of a liquid processing system based on steam-coupled pressurization provided in one embodiment.

[0030] Figure 2 A schematic structural diagram of a liquid treatment system based on steam-coupled pressurization provided in another embodiment.

[0031] Figure 3 A schematic diagram of a process framework of an operating method of a liquid treatment system based on steam-coupled pressurization provided in one embodiment. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the present invention, when a specific device is described as being located between a first device and a second device, an intervening device may or may not be present between the specific device and the first device or the second device. When a specific device is described as being connected to another device, the specific device may be directly connected to the other device without an intervening device, or may be directly connected to the other device but with an intervening device.

[0035] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0036] Reference Figures 1 to 2 In a first aspect, the present application proposes a liquid processing system based on steam-coupled pressurization, comprising: A liquid processing module comprising at least one liquid storage device 10; The gas control module includes a connecting valve piping system 20 connected to the connecting gas source and a boosting valve piping system 30 connected to the boosting gas source. The connecting valve piping system 20 and the boosting valve piping system 30 are respectively connected to the liquid storage device 10 in a decoupling manner. A fluid delivery module, comprising an inlet valve piping system 40 for inputting the pressurized liquid into the liquid storage device 10 and an outlet valve piping system 50 for outputting the pressurized liquid from the liquid storage device 10; The dynamic pressure management module is used to coordinate and control the opening and closing states of the connecting valve piping system 20, the boost valve piping system 30, the liquid inlet valve piping system 40 and the outlet valve piping system 50.

[0037] It should be noted that due to the spatial exclusion problem of gas-liquid phase operations in traditional liquid pressure boosting systems, this embodiment dynamically reconstructs a suitable pressure scenario by controlling the decoupling between the liquid storage device 10 and each valve pipe system. Specifically, at least one liquid storage device 10 in the liquid processing module is used as a basic container unit to provide a temporary storage space for liquid; the gas control module realizes the switching of the connecting gas source and the pressurized gas source by controlling the connecting valve pipe system 20 and the boosting valve pipe system 30. The connecting gas source corresponds to the stage of inputting the liquid to be pressurized into the liquid storage device 10, and the boosting gas source corresponds to the stage of outputting the pressurized liquid from the liquid storage device 10; the fluid delivery module realizes the switching of liquid input and liquid output by controlling the liquid inlet valve pipe system 40 and the outlet valve pipe system 50; the connecting valve pipe system 20, the boosting valve pipe system 30, the liquid inlet valve pipe system 40 and the outlet valve pipe system 50 form an independent control link, and finally the dynamic pressure management module realizes the spatiotemporal coordination of the four types of valve pipe systems. This architecture transforms the physical coexistence of the low-pressure environment required for filling and the high-pressure environment required for boosting into a time-sequential alternation, circumventing the inherent limitations of traditional valve group functional conflicts in a single-tank system. The core advantage of this embodiment lies in the establishment of a programmable pressure field topology, enabling the previously irreconcilable high and low pressure operations to be carried out in an orderly manner over time.

[0038] In one embodiment, the dynamic pressure management module is configured to cause the gas control module and the fluid delivery module to periodically execute: (a) During the liquid collection phase: the connecting valve system 20 and the liquid inlet valve system 40 are selectively opened to supply the liquid to be pressurized into the target liquid storage device 10 , and the pressure-boosting valve system 30 and the outlet valve system 50 are closed; (b) During the pressure increase phase: the boost valve piping system 30 is selectively opened, and the outlet valve piping system 50, the connecting valve piping system 20, and the inlet valve piping system 40 are closed; (c) Liquid discharge stage: The outlet valve piping system 50 and the pressure-increasing valve piping system 30 are selectively opened to discharge the pressurized liquid from the liquid storage device 10 , and the connecting valve piping system 20 and the liquid inlet valve piping system 40 are closed.

[0039] When treating liquids with high viscosity or containing solids, directly injecting steam for pressurization can easily cause uneven mixing of liquid and gas. Therefore, this embodiment breaks down the pressure-boosting process into two sub-states: pure pressurization (stage b) and discharge (stage c). In the stage (stage b) when the boost valve 31 is opened alone, the steam fully penetrates the liquid to achieve homogenized pressure increase; when entering the discharge stage (stage c), the outlet valve 51 is opened again to avoid the gas-liquid two-phase flow impacting the pump body. This refined control is particularly suitable for chemical wastewater treatment scenarios, resolving the contradiction between energy loss and equipment wear during two-phase flow transportation. The three-stage division is essentially a "slow-release strategy" for energy transfer, which improves the thermal energy conversion efficiency by extending the steam action time while protecting downstream precision equipment.

[0040] As another embodiment, the dynamic pressure management module is configured to cause the gas control module and the fluid delivery module to periodically execute: (a) During the liquid collection phase: the connecting valve system 20 and the liquid inlet valve system 40 are selectively opened to supply the liquid to be pressurized into the target liquid storage device 10 , and the pressure-boosting valve system 30 and the outlet valve system 50 are closed; (b) During the pressure increase phase: the pressure boosting valve piping system 30 and the outlet valve piping system 50 are selectively opened to output the pressurized liquid from the liquid storage device 10 , and the connecting valve piping system 20 and the liquid inlet valve piping system 40 are closed.

[0041] For low-viscosity media, such as desalination raw water, this embodiment adopts a simpler two-state cycle: liquid collection stage (a) → pressure increase stage (b). This embodiment opens the boost valve 31 and the outlet valve 51 synchronously (stage b), using the steam pressure potential energy to directly drive the liquid output. This eliminates the buffer container link in the traditional system, allowing the liquid storage device 10 to have both pressure generation and pumping functions. In the reverse osmosis pretreatment scenario, this design significantly improves the system response speed compared to mechanical pump delivery, while avoiding the risk of microbial growth caused by the buffer container. Its essence is to use the compressibility of gas to replace mechanical inertia to achieve pressure energy transmission without moving parts.

[0042] It should be noted that the above-mentioned connecting valve piping system 20, boosting valve piping system 30, liquid inlet valve piping system 40 and outlet valve piping system 50 respectively include at least one connecting valve 21, at least one boosting valve 31, at least one liquid inlet valve 41, at least one outlet valve 51 and corresponding piping systems. Each liquid storage device 10 is connected to the corresponding connecting valve 21, boosting valve 31, liquid inlet valve 41, and outlet valve 51 through a piping system. The connecting valves 21, boosting valve 31, liquid inlet valve 41, and outlet valve 51 corresponding to different liquid storage devices 10 are connected in parallel through piping systems to realize parallel connection of valves of the same type.

[0043] Preferably, a booster pump 60 is further included, coupled to the outlet valve piping system 50, for performing a secondary boost on the pressurized liquid. The booster pump 60 can coordinate with the opening and closing of the outlet valve 51 to specifically extract the pressurized liquid from the liquid storage device 10, and can also perform a secondary boost on the pressurized liquid to increase its pressure.

[0044] As an embodiment, a liquid level detection unit is provided in the liquid storage device 10 , and the liquid level detection unit is used to detect the current liquid level signal in the liquid storage device 10 in real time.

[0045] Because traditional systems cannot sense the real-time liquid level within the tank, flooding (steam carrying liquid) or dry burns are common. This implementation addresses the potential "blind operation" risk of the steam booster system. By dynamically interlocking the liquid level detection unit with the valve, high liquid levels (>L2) shut off the inlet to prevent overflow, while low liquid levels (≤L1) shut off the outlet to prevent cavitation, creating an adaptive safety barrier. This implementation effectively reduces the risk of steam escape in high-risk scenarios such as nuclear power condensate treatment.

[0046] As an embodiment, the pressure of the boosting gas source is greater than the pressure of the liquid to be boosted, and lower than the pressure of the liquid after the boosting pump 60 boosts the pressure.

[0047] Optionally, the pressurized gas source is the vapor of the liquid to be pressurized or other gas that does not chemically react with the liquid / steam.

[0048] Optionally, the liquid to be pressurized is water.

[0049] Because traditional systems use boilers to supply fresh steam, energy is wasted because high-pressure steam directly contacts low-pressure liquid. Therefore, in this embodiment, the boosting gas source pressure is set higher than the pressure of the liquid to be boosted, but lower than the pressure of the liquid after boosting by booster pump 60. Specifically, waste heat steam is used as the gas source to heat and evaporate the liquid to be boosted, forming the boosting gas source and achieving cascaded thermal energy utilization. This pressure range ensures that the steam can overcome the static pressure of the liquid to achieve drive, while also limiting its pressure to the upper limit of the downstream pump.

[0050] Optionally, the pressurized gas source is steam generated by directly or indirectly heating and boiling the pressurized liquid formed after the liquid to be pressurized is pressurized.

[0051] Optionally, the pressurized gas source is a pressurized liquid formed after the liquid to be pressurized is pressurized, and steam is generated after being directly or indirectly heated to boiling, and then the steam is reduced in pressure to a target pressure after a pressure reduction process.

[0052] The two energy recovery paths mentioned above are direct steam reuse and steam recompression reuse. When treating high-temperature fluids (such as geothermal tailwater), direct steam reuse is used to flash-evaporate wastewater above 85°C to provide steam. When treating ambient-temperature fluids, steam recompression reuse is used to extract waste heat from the pressurized fluid through heat exchanger 70. This flexible design overcomes the limitations of water source temperature on heat recovery.

[0053] Reference Figure 2 In some possible embodiments, the number of the liquid storage devices 10 is two or more, and the multiple liquid storage devices 10 share the same interconnecting air source, pressurized air source, liquid to be pressurized, and booster pump 60 .

[0054] Preferably, the system further includes a state switching control module, which is configured to: At any time, at least one liquid storage device 10 is kept in the liquid discharge stage, so that the booster pump 60 is continuously running; According to the liquid level signals of each liquid storage device 10 , different liquid storage devices 10 are triggered alternately to switch to the liquid collecting stage, the pressure increasing stage and the liquid discharging stage.

[0055] It should be noted that when there are two or more liquid storage devices 10, the pain point of traditional multi-tank system control is the conflict of container states. In this embodiment, the state switching control module is used to enforce the time and space rules: at any time, at least one tank is in the discharge state (equivalent to the liquid discharge stage or the pressure increase stage of opening the outlet valve pipe system 50), and the liquid level signal triggers instant switching, which has achieved 100% continuous operation of the booster pump.

[0056] Furthermore, the physical container concept of each liquid storage device 10 is converted into a logical location, and a virtual "infinite container" is constructed through phase difference.

[0057] For example, when the number of liquid storage devices 10, N, is ≥ 2, an operating cycle with a phase difference of 360° / N is set. Timing control ensures that [(N / 2) + 0.5] liquid storage devices 10 are in the liquid discharge state at any given moment (equivalent to the liquid discharge phase or the pressure increase phase of the outlet valve piping system 50). If N is 3, an operating cycle with a phase difference of 120° is set, and two liquid storage devices 10 are in the liquid discharge state during each operating cycle.

[0058] Reference Figure 3 In a second aspect, this embodiment provides an operating method for a liquid treatment system based on steam-coupled pressurization, as applied to the above-mentioned embodiment, comprising: S100, close the boost valve 31 and the outlet valve 51, open the connecting valve 21 and the liquid inlet valve 41, and allow the liquid storage device 10 to collect liquid until the target liquid level is reached; S200, close the connecting valve 21, the liquid inlet valve 41 and the outlet valve 51, open the boost valve 31, and increase the pressure of the liquid storage device 10; S300, close the connecting valve 21 and the liquid inlet valve 41, open the outlet valve 51 and the boost valve 31, and discharge the liquid; S400 , when the pressure of the boosting gas source is insufficient, the boosting pump 60 extracts the boosted liquid from the liquid storage device 10 and performs secondary pressure boosting on the boosted liquid.

[0059] It should be noted that in order to overcome the timing conflict between filling and pressurization, this embodiment performs liquid collection in stage S100 by closing the pressurization valve 31 and the outlet valve 51, opening the connecting valve 21 and the liquid inlet valve 41, and allowing the liquid to be pressurized to enter the corresponding liquid storage device 10 through the liquid inlet valve 41, thereby achieving liquid level collection until the target liquid level is reached. Then, pure pressurization is performed in the S200 stage, and all outlet channels are closed to allow the pressurized steam to completely penetrate the liquid to achieve isobaric infiltration, eliminating the gas-liquid stratification caused by traditional direct drainage; In step S300, the outlet valve 51 is opened to drive the fluid output using the established stable pressure field. The above three-step separation strategy restructures the traditional parallel operation into a serial precision control, avoiding the energy loss caused by the direct impact of the gas phase and the liquid phase.

[0060] In S400 , a secondary pressure boosting stage is carried out, and a pressure redundancy design is implemented using the booster pump 60 , so as to maintain a stable pressure operation of the system when the steam supply is abnormal, thereby significantly improving the fault tolerance rate.

[0061] As an embodiment, the pressure of the communication gas source is not higher than the sum of the first pressure P01 and the second pressure P02; The first pressure P01 is the pressure on the free pressure surface of the liquid to be pressurized; the first pressure P01 represents the ambient pressure of the free liquid surface and is usually atmospheric pressure; The second pressure P02 is the gravity pressure of the liquid to be pressurized formed by the height difference between the free surface of the liquid to be pressurized and the free surface of the liquid storage device 10; the second pressure P02 represents the gravity pressure head of the liquid.

[0062] By limiting the pressure of the connecting gas source to always be lower than the total inlet potential energy, the liquid is guaranteed to flow naturally along the pressure gradient during the S100 stage. If this critical value is exceeded, the connecting gas will reversely invade the upstream pipeline, forming a gas blockage and disrupting the continuity of the liquid flow. This constraint effectively creates a physical barrier to unidirectional flow, eliminating the risk of backflow during valve switching.

[0063] Preferably, the booster gas source pressure is greater than the pressure of the liquid to be boosted, but lower than the pressure of the liquid after boosting by booster pump 60. The lower limit of the booster gas source pressure ensures that the steam pressure exceeds the static pressure of the liquid, allowing the gas to overcome the resistance of the liquid column and effectively perform work. The upper limit of the pressure prevents the overpressure steam from directly driving the liquid beyond the maximum operating pressure of the pump. As the steam expands and pushes the liquid, its pressure naturally decays to the pump's suction pressure range. This eliminates the need for the downstream booster pump 60 to start from zero pressure, creating a buffer zone for energy transfer and extending the life of the booster pump 60.

[0064] As an implementation method, it further includes: Detecting the current liquid level signal in the liquid storage device 10 in real time and comparing the liquid level signal with a preset liquid level threshold; If the current liquid level signal is greater than the preset high liquid level threshold, the liquid inlet valve 41 and the connecting valve 21 corresponding to the current liquid storage device 10 are closed; this not only prevents overflow, but more importantly, maintains sufficient gas phase space for steam diffusion to avoid droplet entrainment and steam quality degradation; If the current liquid level signal is less than or equal to the preset low liquid level threshold, the boost valve 31 and the outlet valve 51 corresponding to the current liquid storage device 10 are closed to completely eliminate the vacuum corrosion and cavitation damage caused by the pump sucking air.

[0065] Preferably, a preset low liquid level threshold is set, and the preset low liquid level threshold is configured to be not lower than the corresponding liquid level of the water inlet connected to the booster pump 60 and the water storage device, to ensure that the suction head is always submerged in liquid; A preset high liquid level threshold is set, and the preset high liquid level threshold is configured to be no higher than the liquid level corresponding to the installation height of the connecting valve 21, and sufficient gas phase space must be reserved.

[0066] Combine Figure 2 As an embodiment, when the number of the liquid storage devices 10 is two or more, it further includes: At any time, at least one liquid storage device 10 is kept in the liquid discharge stage, so that the booster pump 60 operates continuously, replacing time continuity with spatial resources; According to the liquid level signal of each liquid storage device 10, different liquid storage devices 10 are triggered alternately to switch to the liquid collection stage, the pressure increase stage and the liquid discharge stage.

[0067] Preferably, when the current liquid level signal of one of the liquid storage devices 10 is less than the preset low liquid level threshold, the corresponding boosting valve 31 and outlet valve 51 of at least one of the remaining liquid storage devices 10 are opened synchronously; The outlet valve piping system 50 ensures that the inlet of the booster pump 60 is always connected to at least one liquid storage device 10 with an open outlet valve 51 .

[0068] When it is detected that the current liquid level signal of one of the liquid storage devices 10 is lower than the preset low liquid level threshold, the boost valve 31 and the outlet valve 51 corresponding to the other liquid storage device 10 are opened synchronously without waiting for it to be completely emptied, thereby overcoming the delay problem of the traditional system waiting for complete emptying before switching, avoiding flow fluctuations as much as possible, and making the pump inlet pressure change rate close to zero.

[0069] Preferably, the generation path of the pressurized gas source includes: The liquid to be boosted is pressurized by the booster pump 60 and enters the heat exchanger 70 to form steam or mixed gas; The steam or mixed gas is reduced in pressure by a pressure reducing valve to a steam or mixed gas having a target pressure; The decompressed steam or mixed gas is reinjected into the pressurized gas source pipeline.

[0070] The steam energy regulation mechanism is constructed through a four-step cycle of pressurization → vaporization → decompression → reinjection. The heat exchanger 70 can be in the form of a boiler. The liquid to be pressurized is heated and vaporized in the boiler to form steam or a mixed gas, wherein the mixed gas is a mixture of the steam of the liquid to be pressurized and other gases that do not chemically react with the liquid / steam.

[0071] The pressure reducing valve acts as an energy conditioning hub, reducing the high-temperature and high-pressure steam to the system adaptation pressure, so that the steam or mixed gas with the target pressure is reinjected into the boosting gas source pipeline to achieve coupled boosting.

[0072] In summary, compared with the prior art, the above embodiment has at least the following technical advantages: The present invention constructs a coupling mechanism of dynamic pressure field reconstruction and thermodynamic self-circulation, fundamentally solving the irreconcilable contradiction between pressurization and energy recovery in the water treatment process. By deconstructing the spatial limitations of a single container in the traditional system, a phase-staggered operating sequence is established in the physically isolated space of two or more liquid storage devices 10: when one of the liquid storage devices 10 injects high-pressure steam through the boost valve piping 30 to promote liquid output, the other liquid storage device 10 can synchronously open the connecting valve piping 20 to construct a low-pressure field to absorb the liquid to be treated. This idea of ​​decoupling the system into multiple independent operations at the same time, disassembling the high and low pressure environments that cannot coexist into independent spaces for synchronous operation, while maintaining the continuous absorption of liquid working fluid by the boost pump 60, completely gets rid of the periodic stagnation of the process flow; The system reconstructs the thermal cycle path by establishing an energy cascade feedback path. The thermal energy liquid (such as reverse osmosis concentrated water) generated after pressurization is no longer discharged as waste heat, but is converted into medium-pressure steam through the heat exchanger 70 and reinjected into the pressurized gas source pipeline. The energy closed loop formed in this way creates a double gain effect: on the one hand, the recovered steam directly replaces the energy supply demand of the external boiler, reducing the system's structural dependence on external energy; on the other hand, the temperature field of the steam internal circulation maintains the thermal inertia of the pipeline, eliminating the phase change hysteresis effect caused by the temperature difference when the traditional valve is switched, and reducing the pressure fluctuation amplitude to the safety range of the downstream membrane group; This invention combines space for time and heat cycling for dissipation, successfully transforming the water treatment system from a "pressurized unit" into a self-sustaining "pressure-heat dual-balancer." Its benefits extend beyond the system itself and extend to the entire water treatment industry chain: users no longer have to pay the additional cost of frequent membrane module replacement, power plants can reduce boiler capacity redundancy, and environmentally friendly, zero steam emissions are achieved.

[0073] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A liquid processing system based on steam coupling pressurization, characterized in that: include: a liquid processing module comprising at least one liquid storage device; A gas control module, comprising a connecting valve piping system connected to a connecting gas source and a boosting valve piping system connected to a boosting gas source, wherein the connecting valve piping system and the boosting valve piping system are respectively connected to the liquid storage device in a decoupling manner; a fluid delivery module, comprising an inlet valve piping system for inputting the pressurized liquid into the liquid storage device and an outlet valve piping system for outputting the pressurized liquid from the liquid storage device; The dynamic pressure management module is used to coordinate and control the opening and closing states of the connecting valve piping system, the boost valve piping system, the liquid inlet valve piping system and the outlet valve piping system.

2. A liquid processing system based on steam-coupled pressurization according to claim 1, characterized in that: The dynamic pressure management module is configured to cause the gas control module and the fluid delivery module to periodically execute: (a) During the liquid collection phase: selectively open the connecting valve piping system and the liquid inlet valve piping system to supply the liquid to be pressurized into the target liquid storage device, and close the boosting valve piping system and the outlet valve piping system; (b) During the pressure increase phase: selectively open the boost valve piping system, and close the outlet valve piping system, the connecting valve piping system, and the inlet valve piping system; (c) Liquid discharge stage: selectively open the outlet valve piping system and the boost valve piping system to output the pressurized liquid from the liquid storage device, and close the connecting valve piping system and the liquid inlet valve piping system.

3. The liquid processing system based on steam coupling pressurization according to claim 1, characterized in that: The dynamic pressure management module is configured to cause the gas control module and the fluid delivery module to periodically execute: (a) During the liquid collection phase: selectively open the connecting valve piping system and the liquid inlet valve piping system to supply the liquid to be pressurized into the target liquid storage device, and close the boosting valve piping system and the outlet valve piping system; (b) During the pressure increase phase: the boost valve piping system and the outlet valve piping system are selectively opened to output the pressurized liquid from the liquid storage device, and the connecting valve piping system and the liquid inlet valve piping system are closed.

4. The liquid processing system based on steam coupling pressurization according to claim 1, characterized in that: It also includes a booster pump, which is coupled to the outlet valve pipe system and is used to perform secondary pressure boosting on the pressurized liquid.

5. A liquid processing system based on steam-coupled pressurization according to claim 1, 2 or 3, characterized in that: A liquid level detection unit is provided in the liquid storage device, and the liquid level detection unit is used to detect the current liquid level signal in the liquid storage device in real time.

6. The liquid processing system based on steam-coupled pressurization according to claim 4, characterized in that: The pressure of the boosting gas source is greater than the pressure of the liquid to be boosted, and lower than the pressure of the liquid after the boosting pump boosts the pressure.

7. The liquid processing system based on steam-coupled pressurization according to claim 1, characterized in that: The pressurized gas source is the steam of the liquid to be pressurized or other gas that has no chemical reaction with the liquid / steam.

8. The liquid processing system based on steam-coupled pressurization according to claim 1, characterized in that: The liquid to be pressurized is water.

9. The liquid processing system based on steam-coupled pressurization according to claim 1, characterized in that: The pressurized gas source is the pressurized liquid formed after the liquid to be pressurized is pressurized, and the steam is generated after the liquid is directly or indirectly heated and boiled.

10. The liquid processing system based on steam-coupled pressurization according to claim 1, characterized in that: The pressurized gas source is a pressurized liquid formed after the liquid to be pressurized is pressurized, and steam is generated after being directly or indirectly heated and boiled, and then the steam is reduced in pressure to a target pressure after a pressure reduction process.

11. The liquid processing system based on steam coupling pressurization according to claim 5, characterized in that: The number of the liquid storage devices is two or more, and the multiple liquid storage devices share the same interconnecting air source, pressurized air source, liquid to be pressurized, and booster pump.

12. The liquid processing system based on steam coupling pressurization according to claim 11, characterized in that: It also includes a state switching control module, which is configured to: At any time, maintaining at least one liquid storage device in the liquid discharge stage so that the booster pump operates continuously; According to the liquid level signal of each liquid storage device, different liquid storage devices are triggered alternately to switch to the liquid collection stage, the pressure increase stage and the liquid discharge stage.

13. An operating method for a liquid treatment system based on steam-coupled pressurization according to any one of claims 1 to 12, characterized in that: include: S100, closing the boost valve and the outlet valve, opening the connecting valve and the liquid inlet valve, and allowing the liquid storage device to collect liquid until the target liquid level is reached; S200, closing the connecting valve, the liquid inlet valve, and the outlet valve, and opening the boost valve to increase the pressure of the liquid storage device; S300, close the connecting valve and the liquid inlet valve, open the outlet valve and the boost valve, and discharge the liquid; S400: When the pressure of the boosting gas source is insufficient, the boosting liquid is drawn from the liquid storage device by a boosting pump, and the boosting liquid is pressurized a second time.

14. The operating method according to claim 13, characterized in that: The pressure of the connected gas source is not higher than the sum of the first pressure P01 and the second pressure P02; The first pressure P01 is the pressure of the free pressure surface of the liquid to be pressurized; The second pressure P02 is the gravitational pressure of the liquid to be pressurized formed due to the height difference between the free surface of the liquid to be pressurized and the free surface of the liquid storage device.

15. The operating method according to claim 14, characterized in that: The pressure of the boosting gas source is greater than the pressure of the liquid to be boosted, and lower than the pressure of the liquid after the boosting pump boosts the pressure.

16. The operating method according to claim 15, characterized in that: Also includes: Detecting the current liquid level signal in the liquid storage device in real time and comparing the liquid level signal with a preset liquid level threshold; If the current liquid level signal is greater than the preset high liquid level threshold, close the liquid inlet valve and the connecting valve corresponding to the current liquid storage device; If the current liquid level signal is less than or equal to the preset low liquid level threshold, the boost valve and outlet valve corresponding to the current liquid storage device are closed.

17. The operating method according to claim 16, characterized in that: Also includes: Setting the preset low liquid level threshold, wherein the preset low liquid level threshold is configured to be no lower than the corresponding liquid level of the water inlet connected to the booster pump and the water storage device; The preset high liquid level threshold is set, and the preset high liquid level threshold is configured to be no higher than the liquid level corresponding to the installation height of the connecting valve.

18. The operating method according to claim 17, characterized in that: When the number of the liquid storage devices is two or more, the method further comprises: At any time, maintaining at least one liquid storage device in the liquid discharge stage so that the booster pump operates continuously; According to the liquid level signal of each liquid storage device, different liquid storage devices are triggered alternately to switch to the liquid collection stage, the pressure increase stage and the liquid discharge stage.

19. The operating method according to claim 18, characterized in that: Also includes: When the current liquid level signal of one of the liquid storage devices is less than a preset low liquid level threshold, the corresponding boosting valve and outlet valve of at least one of the remaining liquid storage devices are synchronously opened; The outlet valve piping ensures that the inlet of the booster pump is always connected to at least one liquid storage device with an open outlet valve.

20. The operating method according to claim 13, characterized in that: The generation path of the pressurized gas source includes: The liquid to be boosted enters the heat exchanger after being pressurized by the booster pump to form steam or mixed gas; The steam or mixed gas is decompressed to a target pressure through a pressure reducing valve; The decompressed steam or mixed gas is reinjected into the pressurized gas source pipeline.

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