An oil-containing sewage anti-adhesion waste heat recovery system based on trapezoidal corrugated sheets

Abstract

This invention provides a waste heat recovery system for preventing oily wastewater adhesion based on trapezoidal corrugated plates, relating to the field of plate heat exchanger technology. The system includes: an inlet distribution assembly, a supporting shell, a heat exchange plate bundle, a channel isolation assembly, a discrete phase guiding structure, and an outlet collection assembly. The heat exchange plate bundle is composed of multiple stacked heat transfer plates, internally separating independent channels for oily wastewater and cooling medium; the heat transfer plates have abrupt morphological changes along the flow direction. The discrete phase guiding structure is located at these morphological change zones to intercept and force the flow of the discrete oil phase, which migrates laterally to the sidewalls due to the abrupt change in flow direction, back to the central region of the channel when the oily wastewater flows through it. This invention, starting from core flow field control, effectively suppresses oil film adhesion and scaling problems at the heat exchange interface, achieving efficient waste heat recovery and multiphase fluid separation throughout the system's entire lifecycle.

Description

Technical Field

[0001] This invention relates to the field of plate heat exchanger technology, and in particular to a waste heat recovery system for preventing oily wastewater adhesion based on trapezoidal corrugated plates. Background Technology

[0002] Oily wastewater contains a large amount of recoverable waste heat. Plate heat exchangers have the advantages of high heat transfer coefficient and compact structure. The industry widely uses plate heat exchangers to recover waste heat from oily wastewater. To enhance the convective heat transfer process inside the flow channel, the heat exchange plates are usually pressed into a sinusoidal corrugated structure. The sinusoidal corrugated structure can guide the fluid to produce periodic changes in direction within the channel. For example, Chinese invention patent CN108500213A discloses a fluid heat exchange device, and existing technologies generally use sinusoidal corrugated plates as heat transfer elements in waste heat recovery systems.

[0003] The wall geometry of the sinusoidal corrugated channel exhibits a smooth, continuous transition. When oily wastewater flows through this transition region, discrete oil droplets migrate laterally towards the near-wall region due to the radial flow characteristics of the fluid. A large amount of oil phase accumulates near the wall and adheres to the surface of the metal heat exchange plates. Existing heat exchange channels lack localized flow guidance and displacement structures for the accumulated oil phase. The adhered oil phase spreads rapidly and unimpeded on the smooth wall surface, forming a continuous oil film. The thermal conductivity of oil is much lower than that of the metal substrate of the heat exchange plates. This continuous oil film disrupts the conventional heat transfer path between the hot and cold fluids. In the heat exchange system, this continuous oil film constitutes an additional thermal resistance that hinders heat exchange.

[0004] As the equipment continues to operate, the thickness of the continuous oil film layer on the wall increases. This continuous oil film layer occupies the effective flow area of ​​the channel, leading to increased local frictional losses. The pressure drop along the heat exchange channel increases accordingly. The thickened continuous oil film layer gradually dominates the overall heat transfer resistance. The fluid temperature within the hot runner cannot be effectively reduced. The average Nusselt number of the hot fluid decreases significantly. The overall performance evaluation criteria for the heat exchange equipment show a substantial decline. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide an oily wastewater anti-adhesion waste heat recovery system based on trapezoidal corrugated plates. This invention solves the technical problems in the prior art where the sinusoidal corrugated channel lacks an oil phase conduction mechanism and is prone to generating a continuous oil film layer, which leads to the degradation of heat exchange performance.

[0006] To achieve the above objectives, the present invention provides the following solution: An oily wastewater anti-adhesion waste heat recovery system based on trapezoidal corrugated plates includes: Liquid inlet distribution assembly, support shell, heat exchange plate bundle, channel isolation assembly, discrete phase guiding structure and liquid outlet collection assembly; The heat exchange plate bundle is fixed inside the supporting shell; the liquid inlet distribution assembly and the liquid outlet collection assembly are respectively connected to both ends of the supporting shell and are both in communication with the heat exchange plate bundle; the heat exchange plate bundle includes multiple stacked heat transfer substrates, and the channel isolation assembly is disposed between adjacent heat transfer substrates to define mutually independent oily wastewater flow channels and cooling medium flow channels within the heat exchange plate bundle; the heat transfer substrate has a morphological change zone along the fluid flow direction; the discrete phase guiding structure is disposed at the morphological change zone within the oily wastewater flow channel. The liquid inlet distribution component is used to introduce oily wastewater and cooling medium, and to independently introduce the oily wastewater and the cooling medium into the oily wastewater channel and the cooling medium channel, respectively. The supporting shell is used to provide pressure support for the heat exchange plate bundle; The channel isolation component is used to prevent the oily wastewater from physically mixing with the cooling medium; The heat exchange plate bundle is used to provide a heat exchange interface between the oily wastewater and the cooling medium; The discrete phase guiding structure is used to intercept and force the discrete oil phase that migrates laterally to the sidewall due to the sudden change in flow direction when the oily wastewater flows through the morphological change zone, so as to make the discrete oil phase flow back to the central region of the oily wastewater channel. The liquid collection assembly is used to collect the oily wastewater and the cooling medium after heat exchange and discharge them separately.

[0007] The present invention discloses the following technical effects: This invention provides an oily wastewater anti-adhesion waste heat recovery system based on trapezoidal corrugated plates. The invention uses a thermal compensation locking mechanism to absorb thermal expansion deformation to maintain a constant clamping force; it utilizes an inlet distribution component to eliminate large-scale turbulent vortices, reduce the initial oil phase concentration at the inlet interface, and force the fluid to be distributed to the central high-velocity zone; in the core region, the hydraulic shearing effect of the morphological change zone tears apart the initially attached oil phase agglomerates, and in conjunction with the interlayer turbulence generator to break the fluid thermal boundary layer at high frequency, multi-point flexible support protrusions to reduce longitudinal flow resistance, and edge anti-deflection guide plates to force the fluid to deflect back, significantly optimizing heat transfer and flow field distribution; Meanwhile, a channel isolation component is used to absolutely isolate the fluid and provide leakage indication at the microscopic failure boundary; combined with multiple guiding structures such as micro-jet high-frequency impact stripping of the nascent oil film, micro-nano biomimetic guide channels to displace the discrete oil phase, superoleophobic nano-coating to reduce surface adhesion tension, and ultrasonic exciter to crush the continuously growing oil film network, deep anti-adhesion and oil phase diversion are achieved; finally, the outlet dynamic pressure fluctuation is balanced by the liquid collection component, a second gravity sedimentation separation is performed, and the enriched oil phase material is automatically and directionally discharged, thus constructing a complete closed loop from inlet fluid pretreatment, dynamic anti-fouling and anti-adhesion in the core area to efficient multiphase separation at the outlet. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 A schematic diagram of an oily wastewater anti-adhesion waste heat recovery system based on trapezoidal corrugated plates is provided for an embodiment of the present invention. Figure 2 This is a schematic diagram of the corrugated structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of a straight corrugated plate heat exchanger provided in an embodiment of the present invention.

[0010] Figure label: 1-Liquid inlet distribution assembly; 2-Support shell; 3-Heat exchange plate bundle; 4-Channel isolation assembly; 5-Discrete phase guiding structure; 6-Liquid outlet collection assembly. Detailed Implementation

[0011] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0012] 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.

[0013] like Figure 1 As shown, the present invention provides an oily wastewater anti-adhesion waste heat recovery system based on trapezoidal corrugated plates, comprising: 1. Liquid inlet distribution assembly; 2. Support shell; 3. Heat exchange plate bundle; 4. Channel isolation assembly; 5. Discrete phase guiding structure; and 6. Liquid outlet collection assembly. The heat exchange plate bundle 3 is fixed inside the supporting shell 2; the liquid inlet distribution component 1 and the liquid outlet collection component 6 are respectively connected to both ends of the supporting shell 2 and are both in communication with the heat exchange plate bundle 3; the heat exchange plate bundle 3 includes multiple stacked heat transfer substrates, and the channel isolation component 4 is disposed between adjacent heat transfer substrates to define mutually independent oily wastewater flow channels and cooling medium flow channels within the heat exchange plate bundle 3; the heat transfer substrates are provided with a morphological change zone along the fluid flow direction; the discrete phase guiding structure 5 is disposed at the morphological change zone within the oily wastewater flow channel. The liquid inlet distribution component 1 is used to introduce oily wastewater and cooling medium, and to independently introduce the oily wastewater and the cooling medium into the oily wastewater channel and the cooling medium channel, respectively. The supporting shell 2 is used to provide pressure support for the heat exchange plate bundle 3; The channel isolation component 4 is used to prevent the oily wastewater from physically mixing with the cooling medium; The heat exchange plate bundle 3 is used to provide a heat exchange interface between the oily wastewater and the cooling medium; The discrete phase guiding structure 5 is used to intercept and force the discrete oil phase that migrates laterally toward the sidewall due to the sudden change in flow direction when the oily wastewater flows through the morphological change zone, so as to make the discrete oil phase flow back toward the central region of the oily wastewater channel. The liquid collection component 6 is used to collect the oily wastewater and the cooling medium after heat exchange and discharge them separately.

[0014] Specifically, such as Figure 2 As shown, the system uses trapezoidal corrugated plates as the core component to construct the heat transfer interface. Combined with... Figure 3 The corrugated plate heat exchanger basic assembly structure shown in this embodiment, the oily wastewater anti-adhesion waste heat recovery system mainly includes: liquid inlet distribution component 1, support shell 2, heat exchange plate bundle 3, channel isolation component 4, discrete phase guiding structure 5, and liquid outlet collection component 6.

[0015] In terms of overall assembly, the heat exchange plate bundle 3 is fixed inside the supporting housing 2, with the supporting housing 2 providing pressure support for the heat exchange plate bundle 3. The liquid inlet distribution assembly 1 and the liquid outlet collection assembly 6 are respectively connected to both ends of the supporting housing 2 and are both in communication with the interior of the heat exchange plate bundle 3. The heat exchange plate bundle 3 includes multiple stacked heat transfer substrates. The channel isolation assembly 4 is disposed between adjacent heat transfer substrates to define independent oily wastewater flow channels and cooling medium flow channels within the heat exchange plate bundle 3. Simultaneously, the channel isolation assembly 4 prevents the oily wastewater from physically mixing with the cooling medium. The heat transfer substrate has a morphological abrupt change region along the fluid flow direction, and the discrete phase guiding structure 5 is specifically located at the morphological abrupt change region within the oily wastewater flow channel.

[0016] Based on the above hardware system architecture, the specific operation and drainage process of the oily wastewater anti-adhesion waste heat recovery system in this embodiment is as follows: Phase 1: Fluid distribution and independent import.

[0017] The oily wastewater with initial residual heat and the cooling medium used for heat absorption are synchronously pumped into the liquid inlet distribution assembly 1. The liquid inlet distribution assembly 1 is used to introduce the oily wastewater and the cooling medium, and to independently guide the oily wastewater and the cooling medium into the oily wastewater channel and the cooling medium channel within the heat exchange plate bundle 3, respectively.

[0018] Phase 2: Core heat exchange and forced anti-adhesion drainage.

[0019] The imported oily wastewater and the cooling medium are introduced into their respective flow channels in opposite or intersecting directions. The heat exchange plate bundle 3 provides the heat exchange interface between the oily wastewater and the cooling medium. During the heat transfer process, the overall total heat transfer of the system follows a thermodynamic calculation model: ; in, For heat exchange area, The logarithmic mean temperature difference The overall heat transfer coefficient; Furthermore, as a constitutive interpretation of the anti-adhesion heat transfer performance of the heat exchanger bundle 3, the evolution of the overall heat transfer coefficient of the system during operation conforms to the defined heat transfer evaluation model: ; in, The wall thickness of the heat transfer substrate. The thermal conductivity of the heat transfer substrate. For oil film thermal resistance, Let be the heat transfer coefficient of the cold fluid. denoted as the heat transfer coefficient of the hot fluid.

[0020] In this theoretical model, if the discrete oil phase adheres to the wall surface to form an oil film, this oil film will be equivalent to a thin solid layer with low thermal conductivity, introducing additional oil film thermal resistance into the total heat transfer thermal resistance. As the oil film thickness continues to increase, this additional oil film thermal resistance will gradually become the core factor dominating the total heat transfer thermal resistance, causing the total heat transfer coefficient to drop sharply. Based on this physical attenuation mechanism, the morphological abrupt change region in this embodiment, in conjunction with the forced flow and tearing effect of the discrete phase conductive structure 5, eliminates the additional oil film thermal resistance variable in the above model from the root by suppressing the initial adhesion and continuous thickening of the bottom oil film, thereby ensuring the efficient heat transfer of the system throughout its entire life cycle.

[0021] During the continuous heat exchange process, when the oily wastewater flows through the morphological change zone on the heat transfer substrate, the internal flow field direction changes drastically due to the change in cross-sectional geometry, causing some of the lighter discrete oil phases to tend to migrate laterally towards the sidewall of the flow channel. At this time, the discrete phase guiding structure 5 located here is used to intercept and force the discrete oil phases that migrate laterally towards the sidewall due to the sudden change in flow field direction when the oily wastewater flows through the morphological change zone, so that the discrete oil phases flow back to the central area of ​​the oily wastewater flow channel, thereby completely breaking the oil phase accumulation effect in the near-wall area and inhibiting the formation of oil film.

[0022] Phase 3: Fluid terminal collection and discharge.

[0023] After heat exchange and anti-adhesion treatment are completed by the heat exchange plate bundle 3, the cooled oily wastewater and the heated cooling medium flow into the liquid collection component 6 respectively. The liquid collection component 6 is used to collect the oily wastewater and the cooling medium after heat exchange, and discharge them to the outside through their respective independent pipe networks, thereby completing a complete waste heat recovery cycle.

[0024] Furthermore, to address the thermal stress fatigue problem caused by the alternating action of high-temperature oily wastewater and cooling medium, and to ensure the sealing stability of the system, the support shell 2 specifically includes: a load-bearing static pressure end plate, an adaptive sliding pressure plate, and a thermal compensation locking mechanism. In terms of assembly, the load-bearing static pressure end plate is vertically fixed to the system base, serving as the assembly positioning reference surface for the heat exchange plate bundle 3 and providing a rigid support starting point; the adaptive sliding pressure plate abuts against the tail end of the heat exchange plate bundle 3, and to reduce sliding friction resistance, a follower roller assembly is fixedly attached to the bottom surface of the adaptive sliding pressure plate; the thermal compensation locking mechanism penetrates and connects the load-bearing static pressure end plate and the adaptive sliding pressure plate, and is used to absorb the thermal expansion deformation of the heat exchange plate bundle 3 caused by the fluid temperature jump, thereby maintaining a constant clamping force on the heat exchange plate bundle 3.

[0025] In the fluid introduction stage, to improve flow field uniformity and achieve oil-water separation at the inlet stage, the liquid distribution assembly 1 includes: a rectifier and drag-reducing cavity, a multi-stage vortex pre-separator, and a non-uniform liquid distribution network. The output end of the rectifier and drag-reducing cavity is connected to the inlet end of the multi-stage vortex pre-separator. The rectifier and drag-reducing cavity is used to receive and buffer the high-pressure oily wastewater to eliminate large-scale turbulent eddies. The multi-stage vortex pre-separator is used to perform hydrodynamic pretreatment on the oily wastewater using centrifugal force to reduce the initial oil phase concentration at the inlet interface. Furthermore, the non-uniform liquid distribution network connects the outlet end of the multi-stage vortex pre-separator to the heat exchange plate bundle 3. To address the problem of excessively high edge flow velocity caused by the wall effect of conventional heat exchangers, the diameter of the central region of the non-uniform liquid distribution network is larger than that of the edge region, thereby forcing the fluid to be distributed to the high-velocity zone in the center of the oily wastewater flow channel.

[0026] The abrupt change region (i.e., the trapezoidal corrugated transition structure) on the heat transfer substrate specifically includes: a first physical bend boundary, a second physical bend boundary, and a transition connecting slope. The first physical bend boundary is located at the abrupt narrowing of the flow channel on the water-facing side of the heat transfer substrate; the second physical bend boundary is located at the abrupt widening of the flow channel on the backwater side of the heat transfer substrate; and the transition connecting slope connects the first and second physical bend boundaries. This abrupt change structure is used to create a locally accelerated shear flow field when the oily wastewater flows through it, thereby forcefully tearing apart the initially attached oil phase agglomerates using hydraulic shearing.

[0027] In addition, to further enhance heat exchange efficiency and maintain flow field stability within the channel, the heat exchange plate bundle 3 also includes: an interlayer turbulence generator, multi-point flexible support bosses, and edge anti-deflection guide vanes. Specifically, the interlayer turbulence generator is suspended and fixed in the central space of adjacent heat transfer substrates to periodically break the fluid thermal boundary layer at high frequency; the multi-point flexible support bosses are distributed in a lattice pattern on the inner wall of the cooling medium channel, which effectively reduces the rigid obstruction surface to the longitudinal flow of the fluid while ensuring the pressure resistance of the heat transfer substrate, thereby reducing the pressure drop along the flow path; at the same time, the edge anti-deflection guide vanes are inclined and fixed to the side edge of the heat transfer substrate channel to force the oily wastewater that tends towards the low-velocity zone on the side wall to be deflected back to the mainstream zone in the center of the channel, and work with the non-uniform liquid distribution network to completely eliminate the low-velocity dead zone at the edge.

[0028] Furthermore, in order to comprehensively quantify the improvement in overall system performance brought about by the interlayer turbulence generator, the multi-point flexible support boss, and the edge anti-deflection guide plate when working together, this embodiment introduces the Performance Evaluation Criterion (PEC) as an evaluation indicator, and its quantitative evaluation logic is strictly based on: ;in, and The average values ​​under the reference working conditions are respectively Number and Fanning friction factor.

[0029] By applying the aforementioned combined spatial topology, the system effectively increases the average Nusselt number on the oily wastewater side to enhance convective heat transfer. At the same time, by utilizing the low resistance characteristics of multi-point flexible support, it successfully controls the friction factor along the channel that is increased due to fluid boundary layer reshaping within an extremely low threshold, thereby ensuring a significant leap in the overall performance index (PEC) of the entire heat exchange channel under the "high flow rate, strong disturbance" condition.

[0030] Furthermore, in order to cope with the thermal expansion and contraction effect under long-term high and low temperature alternating conditions and to completely eliminate cross-contamination of media, the channel isolation component 4 in this embodiment adopts a composite sealing structure that combines rigidity and flexibility, specifically including: a hard phase clamping ring, a self-expanding flexible sealing core, and a leakage tracer detection strip.

[0031] In terms of physical framework support, the rigid phase clamping ring is fitted and fixed to the periphery of the adjacent heat transfer substrate. This structure not only serves as a sealing carrier but also provides rigid limiting support for the channel gap under fluid pressurization, effectively preventing edge buckling of the heat transfer substrate or excessive compression of the gap under pressure.

[0032] Regarding core fluid isolation, the self-expanding flexible sealing core is embedded in the inner annular groove of the hard phase clamping ring. When the heat exchange system is started and hot fluid is introduced, the self-expanding flexible sealing core undergoes a fixed-area volume expansion upon heating. This expansion deformation adaptively fills the microscopic deformation gaps caused by machining tolerances or thermal stress, thereby effectively and actively compensating for and completely isolating the oily wastewater from the cooling medium.

[0033] In terms of safety early warning and failure visualization, the leak tracer detection strip is tightly wrapped around the outer sidewall of the self-expanding flexible sealing core. The leak tracer detection strip is configured as a chemical indicator layer sensitive to specific components, which undergoes an irreversible color change reaction upon contact with oil-phase substances. Through this mechanism, when a tiny leak occurs in the sealing defense, the microscopic failure boundary of the sealing layer can be indicated in advance before the macroscopic physical leak occurs, thereby providing an intuitive physical indicator for the preventive maintenance of the system.

[0034] Furthermore, to move from macroscopic flow field control to active anti-fouling at the microscopic interface, the discrete phase guiding structure 5 in this embodiment constructs a multidimensional anti-adhesion system encompassing hydraulic stripping, interfacial repulsion, and acoustic pulverization. Specifically, the basic physical and hydraulic components of this guiding structure include: a jet stripping hole array, micro / nano biomimetic guide channels, and phase separation baffles.

[0035] In terms of structural distribution and working mechanism, the jet stripping hole array penetrates the high-pressure sidewall of the morphological abrupt change zone. This array cleverly utilizes the inherent pressure difference between the hot and cold channels to divert a very small portion of the high-pressure cooling medium, forming a high-speed microjet locally in the easily fouling abrupt change zone, thereby directly stripping the nascent oil film on the wall surface through high-frequency hydraulic impact. Simultaneously, the phase separation baffle ridge protrudes from the bottom wall of the oily wastewater flow channel, and the extension direction of the phase separation baffle ridge forms an angle of 15 to 30 degrees with the main fluid flow direction to guide the bottom fluid to deflect; in conjunction with the flow guiding effect of the baffle ridge, the micro-nano biomimetic flow guide groove is distributed along the back flow surface of the phase separation baffle ridge, which is used to accurately capture and displace the discrete oil phase stripped by the jet using the fluid capillary force generated by the micro-channels, preventing its secondary adhesion.

[0036] In order to completely disrupt the continuous growth network of the oil film, the discrete phase guiding structure 5 further integrates material and acoustic components, specifically including: a superoleophobic nanocoating, an ultrasonic vibrator, and a guiding bus grid.

[0037] In terms of passive interface protection, the superoleophobic nanocoating is densely deposited on the inner metal wall of the oily wastewater channel, significantly reducing the surface adhesion tension of the discrete oil phase at the solid-liquid interface at the molecular level. For active high-energy descaling, the ultrasonic exciter is attached to a blind hole on the back side of the morphology abrupt change zone; this blind hole structure ensures absolute watertightness of the channel while achieving efficient energy conduction. The ultrasonic exciter continuously emits cavitation sound waves into the local flow field, utilizing the microjets and shock waves generated by the cavitation effect to thoroughly shatter the continuously growing oil film network. Finally, in terms of end-product drainage, the guiding grid is connected across the discharge end of the oily wastewater channel, re-aggregating the micron-sized oil droplets shattered by the ultrasonic exciter and forcibly guiding them to the high-velocity zone in the center of the channel for discharge with the mains fluid.

[0038] The liquid collection assembly 6 includes: Gas-liquid-solid multiphase separation package, fluid equalization pipe gallery and adaptive oil drain valve assembly; The gas-liquid-solid multiphase separation package receives the oily wastewater discharged from the heat exchange plate bundle 3 for a second gravity sedimentation separation of the oil and water phases. The fluid equalization pipe gallery extends laterally through the lower region of the gas-liquid-solid multiphase separation package to balance the dynamic pressure fluctuations generated at the outlet convergence point of the multiple oily wastewater channels. The adaptive oil discharge valve assembly is located at the top liquid level line of the gas-liquid-solid multiphase separation package, and is used to automatically open and directionally discharge the enriched oil phase substances according to the thickness of the oil accumulation.

[0039] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0040] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A waste heat recovery system for preventing oily wastewater adhesion based on trapezoidal corrugated plates, characterized in that, include: Liquid inlet distribution assembly, support shell, heat exchange plate bundle, channel isolation assembly, discrete phase guiding structure and liquid outlet collection assembly; The heat exchange plate bundle is fixed inside the supporting shell; the liquid inlet distribution assembly and the liquid outlet collection assembly are respectively connected to both ends of the supporting shell and are both in communication with the heat exchange plate bundle; the heat exchange plate bundle includes multiple stacked heat transfer substrates, and the channel isolation assembly is disposed between adjacent heat transfer substrates to define mutually independent oily wastewater flow channels and cooling medium flow channels within the heat exchange plate bundle; the heat transfer substrate has a morphological change zone along the fluid flow direction; the discrete phase guiding structure is disposed at the morphological change zone within the oily wastewater flow channel. The liquid inlet distribution component is used to introduce oily wastewater and cooling medium, and to independently introduce the oily wastewater and the cooling medium into the oily wastewater channel and the cooling medium channel, respectively. The supporting shell is used to provide pressure support for the heat exchange plate bundle; The channel isolation component is used to prevent the oily wastewater from physically mixing with the cooling medium; The heat exchange plate bundle is used to provide a heat exchange interface between the oily wastewater and the cooling medium; The discrete phase guiding structure is used to intercept and force the discrete oil phase that migrates laterally to the sidewall due to the sudden change in flow direction when the oily wastewater flows through the morphological change zone, so as to make the discrete oil phase flow back to the central region of the oily wastewater channel. The liquid collection assembly is used to collect the oily wastewater and the cooling medium after heat exchange and discharge them separately.

2. The oily wastewater anti-adhesion waste heat recovery system based on trapezoidal corrugated plates according to claim 1, characterized in that, The supporting housing includes: Load-bearing static pressure end plate, adaptive sliding pressure plate, and thermal compensation locking mechanism; The load-bearing static pressure end plate is vertically fixed to the system base and serves as the assembly positioning reference surface for the heat exchange plate bundle. The adaptive sliding pressure plate abuts against the tail end of the heat exchange plate bundle, and a follower roller assembly is fixedly connected to the bottom surface of the adaptive sliding pressure plate. The thermal compensation locking mechanism passes through and connects the load-bearing static pressure end plate and the adaptive sliding pressure plate, and is used to absorb the thermal expansion deformation of the heat exchange plate bundle caused by the fluid temperature step to maintain a constant clamping force.

3. The oily wastewater anti-adhesion waste heat recovery system based on trapezoidal corrugated plates according to claim 1, characterized in that, The liquid dispensing assembly includes: Rectifying and reducing resistance cavity, multi-stage vortex pre-distributor, and non-uniform liquid distribution network; The output end of the rectifier and drag-reducing cavity is connected to the inlet end of the multi-stage vortex pre-separator. The rectifier and drag-reducing cavity is used to receive and buffer the high-pressure oily wastewater to eliminate large-scale turbulent eddies. The multi-stage cyclone pre-separator is used to perform hydrodynamic pretreatment on the oily wastewater using centrifugal force to reduce the initial oil phase concentration at the inlet interface. The non-uniform liquid distribution network connects the outlet end of the multi-stage vortex pre-separator to the heat exchange plate bundle, and the diameter of the central region of the non-uniform liquid distribution network is larger than that of the edge region, so as to force the fluid to be distributed to the high-velocity zone in the center of the oily wastewater flow channel.

4. The oily wastewater anti-adhesion waste heat recovery system based on trapezoidal corrugated plates according to claim 1, characterized in that, The abrupt morphological regions on the heat transfer substrate include: The first physical bend boundary, the second physical bend boundary, and the transition connecting slope; The first physical bend boundary is located at the abrupt narrowing position of the flow channel on the water-facing side of the heat transfer substrate. The second physical bend boundary is located at the flow channel abrupt expansion position on the back water side of the heat transfer substrate; The transitional connecting slope connects the first physical bend boundary and the second physical bend boundary, and is used to form a local accelerated shear flow field when the oily wastewater flows through it, so as to use hydraulic shearing to tear apart the initially attached oil phase agglomerates.

5. The oily wastewater anti-adhesion waste heat recovery system based on trapezoidal corrugated plates according to claim 1, characterized in that, The heat exchanger plate bundle also includes: Interlayer turbulence generator, multi-point flexible support boss and edge anti-deflection guide plate; The interlayer turbulence generator is suspended and fixed in the central space of the adjacent heat transfer substrate, and is used to periodically break the fluid thermal boundary layer at high frequency. The multi-point flexible support protrusions are distributed in a dot matrix on the inner wall of the cooling medium flow channel, which is used to reduce the rigid obstruction surface to the longitudinal flow of fluid while ensuring the pressure bearing strength of the heat transfer substrate. The edge anti-deflection guide plate is inclinedly fixed to the flow channel side edge of the heat transfer substrate, and is used to force the oily wastewater that tends to the low-speed zone of the side wall to be deflected back to the main flow zone in the center of the flow channel.

6. The oily wastewater anti-adhesion waste heat recovery system based on trapezoidal corrugated plates according to claim 1, characterized in that, The channel isolation component includes: Hard phase clamping ring, self-expanding flexible sealing core, and leak tracing detection strip; The rigid phase clamping ring is attached and fixed to the periphery of the adjacent heat transfer substrate, providing rigid limiting support for the channel gap; The self-expanding flexible sealing core is embedded in the inner annular groove of the hard phase compression ring. After being heated, it undergoes a fixed-area volume expansion to absolutely isolate the oily sewage from the cooling medium. The leakage tracer detection strip is tightly wrapped around the outer sidewall of the self-expanding flexible sealing core, and is used to cause irreversible discoloration when it comes into contact with oil phase substances to indicate the microscopic failure boundary of the sealing layer.

7. The oily wastewater anti-adhesion waste heat recovery system based on trapezoidal corrugated plates according to claim 1, characterized in that, The discrete phase depletion structure includes: Jet stripping hole array, micro / nano biomimetic guide grooves and phase separation baffles; The jet stripping hole array penetrates the high-pressure side wall of the morphological change zone and is used to guide part of the cooling medium to form micro-jet locally to impact and strip the nascent oil film at high frequency. The phase separation ridge protrudes from the bottom wall of the oily wastewater flow channel, and the extension direction of the phase separation ridge forms an angle of 15 to 30 degrees with the main fluid flow direction. The micro-nano biomimetic guide channels are distributed along the backflow surface of the phase separation ridge, and are used to capture and displace the stripped discrete oil phase using fluid capillary force.

8. The oily wastewater anti-adhesion waste heat recovery system based on trapezoidal corrugated plates according to claim 7, characterized in that, The discrete phase depletion structure also includes: Superoleophobic nanocoating, ultrasonic vibrator and guide bus grid; The superoleophobic nanocoating is densely deposited on the inner metal wall of the oily wastewater channel to reduce the surface adhesion tension of the discrete oil phase at the solid-liquid interface. The ultrasonic vibrator is attached to the blind hole on the back side of the morphological change zone and is used to emit cavitation sound waves into the local flow field to shatter the continuously growing oil film network. The guiding grid is connected across the discharge end of the oily wastewater channel to re-aggregate the micron-sized oil droplets pulverized by the ultrasonic vibrator and guide them to the center of the channel.

9. A waste heat recovery system for preventing oily wastewater adhesion based on trapezoidal corrugated plates according to claim 1, characterized in that, The liquid collection assembly includes: Gas-liquid-solid multiphase separation package, fluid equalization pipe gallery and adaptive oil drain valve assembly; The gas-liquid-solid multiphase separation package receives the oily wastewater discharged from the heat exchange plate bundle for a second gravity sedimentation separation of the oil and water phases. The fluid equalization pipe gallery extends laterally through the lower region of the gas-liquid-solid multiphase separation package to balance the dynamic pressure fluctuations generated at the outlet convergence point of the multiple oily wastewater channels. The adaptive oil discharge valve assembly is located at the top liquid level line of the gas-liquid-solid multiphase separation package, and is used to automatically open and directionally discharge the enriched oil phase substances according to the thickness of the oil accumulation.

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