Integrated low-temperature evaporator

Abstract

The utility model relates to the technical field of evaporators, and provides an integrated low-temperature evaporator which comprises an evaporating tank, the evaporating tank is provided with a heat exchange cavity, the heat exchange cavity is provided with a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are located on the front side and the rear side of the heat exchange cavity respectively, and a liquid collecting plate is arranged in the middle of the heat exchange cavity and located on the upper side of the liquid inlet and provided with a flow guide groove. The flow guide groove leads to the liquid outlet, the condensation pipe is arranged in the heat exchange cavity and located above the liquid collecting plate, and the evaporation pipe is arranged in the heat exchange cavity and located below the liquid collecting plate. By means of the technical scheme, the problem that in the prior art, a low-temperature evaporator is poor in evaporation stability is solved.

Description

Technical Field

[0001] This utility model relates to the field of evaporator technology, specifically to an integrated low-temperature evaporator. Background Technology

[0002] In the field of low-temperature evaporation treatment, traditional evaporators have many problems and limitations in terms of structure and performance that need to be solved, making it difficult to meet the requirements of efficient and stable liquid treatment and heat exchange.

[0003] Early evaporators often employed simple and decentralized structural designs. For example, heat exchange components were typically installed independently, lacking a close and rational layout and coordination. This prevented the liquid from forming an efficient and orderly flow path during evaporation. After entering the evaporator, liquid was prone to localized accumulation and uneven flow, causing some liquid to flow out without sufficient contact with the heat exchange components, thus failing to fully participate in the heat exchange process. This significantly reduced the evaporator's heat exchange efficiency, increased energy waste, and made it difficult to achieve continuous and stable evaporation and condensation cycles, ultimately affecting the effective treatment of the liquid.

[0004] In terms of liquid flow guidance, traditional evaporators lack effective liquid collection and guidance structures. After entering, the liquid often flows randomly due to a lack of proper guidance. This not only hinders the full transfer of heat but can also cause localized overheating or undercooling, affecting the overall heat balance and heat exchange efficiency within the evaporator. Furthermore, disordered liquid flow easily leads to scaling and blockages inside the evaporator, increasing maintenance costs and the risk of failure, and reducing the equipment's lifespan and operational stability.

[0005] In the condensation stage, traditional condensation methods and related component settings are not optimized. The condenser tube layout of some evaporators is unreasonable, failing to achieve sufficient and efficient heat exchange with the steam generated during evaporation. This results in slow steam condensation and excessive residence time within the evaporator, further impacting the overall system's heat exchange efficiency and operating rhythm. The inability to promptly convert steam into liquid limits the overall processing capacity of the evaporator, making it difficult to meet the requirements of large-scale, continuous liquid processing. Utility Model Content

[0006] This invention proposes an integrated low-temperature evaporator, which solves the problem of poor evaporation stability in related technologies.

[0007] The technical solution of this utility model is as follows:

[0008] An integrated low-temperature evaporator includes:

[0009] An evaporator having a heat exchange chamber having a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet being located at the front and rear sides of the heat exchange chamber, respectively;

[0010] A liquid collecting plate is disposed in the middle of the heat exchange chamber, located above the liquid inlet, and the liquid collecting plate has a guide groove leading to the liquid outlet;

[0011] A condenser tube is disposed inside the heat exchange chamber and located above the liquid collection plate;

[0012] An evaporator is disposed inside the heat exchange chamber and located below the liquid collection plate.

[0013] As a further technical solution, it also includes:

[0014] A compressor is disposed on one side of the evaporator and leads to the evaporator tube;

[0015] The first refrigerant transfer tank, and the evaporator pipe is connected to the first refrigerant transfer tank;

[0016] An expansion valve is provided, with the first refrigerant transfer tank connected to the expansion valve, and the expansion valve connected to the condenser coil;

[0017] The second refrigerant transfer tank is connected to the condenser pipe, and the second refrigerant transfer tank is connected to the compressor.

[0018] As a further technical solution, the top of the heat exchange chamber has a negative pressure port, and also includes:

[0019] The condenser, wherein the negative pressure port leads to the condenser;

[0020] A vacuum pump, the condenser being connected to the vacuum pump;

[0021] A water tank, the vacuum pump is connected to the water tank, and the liquid outlet is also connected to the water tank.

[0022] As a further technical solution, the liquid collection plate also has a heat insulation cavity, and further includes:

[0023] A heat insulation layer is disposed within the heat insulation cavity.

[0024] As a further technical solution, the condenser tube is arranged in an elliptical shape, the liquid collection plate is arc-shaped, and the guide groove is located in the middle of the liquid collection plate.

[0025] As a further technical solution, the width of the liquid collection plate is greater than the maximum condensation width after the condenser tube is installed.

[0026] As a further technical solution, the condenser is a two-pass heat exchanger and the evaporator is a four-pass evaporator.

[0027] As a further technical solution, the liquid collecting plate also has a collection channel, and there are several collection channels. The collection channels are symmetrically arranged along the guide channel and lead to the guide channel. The collection channels and the guide channel are arranged at an acute angle.

[0028] As a further technical solution, the depth of the flow collection channel gradually increases from both sides of the liquid collection plate towards the flow guide channel.

[0029] As a further technical solution, it also includes:

[0030] A thermostatic tube is disposed between the insulation layer and the inner wall of the insulation cavity, and is used to cool the upper surface of the liquid collection plate.

[0031] The working principle and beneficial effects of this utility model are as follows:

[0032] In this invention, the integrated low-temperature evaporator achieves efficient heat exchange and phase transformation through the rational layout and coordinated operation of various components within the evaporator tank. Liquid enters through the inlet, evaporates at the evaporation tubes, and the vapor rises to the condenser tubes where it is condensed into liquid. The liquid then flows through the guide channels of the collecting plate to the outlet. Throughout this process, heat is transferred and fully utilized between different components in an orderly manner, achieving continuous evaporation and condensation circulation of the liquid. This maximizes the heat exchange efficiency of the evaporator, reduces energy consumption, and ensures stable operation and effective liquid handling capabilities. Attached Figure Description

[0033] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.

[0034] Figure 1 This is a schematic diagram illustrating the principle of this utility model;

[0035] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0036] Figure 3 This is a schematic diagram of the liquid collection plate structure of this utility model;

[0037] In the diagram: Evaporator-1, Heat exchange chamber-101, Liquid inlet-102, Liquid outlet-103, Negative pressure port-104, Liquid collection plate-2, Guide channel-201, Insulation chamber-202, Collection channel-203, Condenser-3, Evaporator-4, Compressor-5, First refrigerant transfer tank-6, Expansion valve-7, Second refrigerant transfer tank-8, Condenser-9, Vacuum pump-10, Water tank-11, Insulation layer-12, Thermostatic pipe-13. Detailed Implementation

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0039] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0040] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] Reference Figures 1-3The first embodiment of this utility model proposes an integrated low-temperature evaporator, including an evaporator tank 1. The evaporator tank 1 has a heat exchange chamber 101, which has a liquid inlet 102 and a liquid outlet 103. The liquid inlet 102 and the liquid outlet 103 are located on the front and rear sides of the heat exchange chamber 101, respectively. A liquid collecting plate 2 is disposed in the middle of the heat exchange chamber 101, located above the liquid inlet 102. The liquid collecting plate 2 has a guide groove 201, which leads to the liquid outlet 103. A condenser tube 3 is disposed in the heat exchange chamber 101 and located above the liquid collecting plate 2. An evaporator tube 4 is disposed in the heat exchange chamber 101 and located below the liquid collecting plate 2.

[0043] In this embodiment, the heat exchange chamber 101 of the evaporator 1 is the core space for heat exchange and liquid handling in the entire low-temperature evaporator. It houses key components such as the liquid inlet 102, liquid outlet 103, liquid collection plate 2, condenser tube 3, and evaporator tube 4. Through a reasonable layout and coordinated operation, this chamber completes a series of important heat exchange and phase change processes, including liquid input, evaporation, condensation, and discharge, providing a basic working environment for the normal operation of the entire evaporator. The liquid inlet 102 and liquid outlet 103 are located at the front and rear of the heat exchange chamber 101, respectively. This relative positioning facilitates a more reasonable flow path for the liquid within the heat exchange chamber 101. After entering through the liquid inlet 102, the liquid exchanges heat with various components within the chamber and flows towards the liquid outlet 103 under the guidance of structures such as the liquid collection plate 2. This allows the liquid to fully transfer heat with the evaporator tube 4, condenser tube 3, etc., maximizing the utilization of the space within the heat exchange chamber 101 for heat exchange, improving the evaporator's efficiency, and preventing the liquid from flowing out prematurely without fully participating in the heat exchange process.

[0044] The liquid collecting plate 2 is located in the middle of the heat exchange chamber 101 and above the liquid inlet 102. Its guide channel 201 leads to the liquid outlet 103. This design cleverly guides the flow direction of the liquid in the heat exchange chamber 101. When the liquid enters from the liquid inlet 102, some liquid may flow disorderly or accumulate due to various factors. The liquid collecting plate 2 can collect this liquid and guide it in a predetermined direction, that is, towards the liquid outlet 103, through the guide channel 201. This makes the flow of liquid in the heat exchange chamber 101 more orderly and smooth, ensuring that the liquid can fully pass through each heat exchange component, further improving the heat exchange effect and efficiency.

[0045] While condensing steam, the condenser tube 3, together with other components in the heat exchange chamber 101, participates in the heat exchange process. Through the temperature difference between the condenser tube and the steam, it quickly absorbs the heat of the steam and transfers it to the cooling medium. This not only increases the speed of steam condensation but also makes the heat distribution in the entire heat exchange chamber 101 more reasonable, further optimizing the overall heat exchange efficiency of the evaporator, reducing energy waste, and improving the working performance of the evaporator.

[0046] This integrated low-temperature evaporator achieves efficient heat exchange and phase transformation processes through the rational layout and coordinated operation of various components within the evaporator tank 1. Liquid enters through the inlet 102, is heated and evaporated at the evaporator tube 4, and the vapor rises to the condenser tube 3 where it is condensed into liquid. The liquid then flows through the guide channel 201 of the collecting plate 2 and towards the outlet 103. Throughout the process, heat is transferred and fully utilized between different components in an orderly manner, achieving continuous evaporation and condensation circulation of the liquid. This maximizes the heat exchange efficiency of the evaporator, reduces energy consumption, and ensures stable operation and effective liquid handling capabilities.

[0047] Furthermore, it also includes a compressor 5, which is located on one side of the evaporator 1 and leads to the evaporator pipe 4. The evaporator pipe 4 leads to the first refrigerant transfer tank 6, the first refrigerant transfer tank 6 leads to the expansion valve 7, the expansion valve 7 leads to the condenser pipe 3, the condenser pipe 3 leads to the second refrigerant transfer tank 8, and the second refrigerant transfer tank 8 leads to the compressor 5.

[0048] In this embodiment, a complete refrigeration cycle system is constructed by adding a compressor 5, a first refrigerant transfer tank 6, an expansion valve 7, and a second refrigerant transfer tank 8, and connecting them to the evaporator tube 4 and the condenser tube 3 in a specific sequence. The compressor 5, as the power source of the cycle, compresses the refrigerant, increasing its pressure and temperature before delivering it to the evaporator tube 4. The refrigerant absorbs heat and evaporates in the evaporator tube 4, becoming a low-temperature, low-pressure gaseous refrigerant that enters the first refrigerant transfer tank 6 for temporary storage and state transition. Then, after being throttled and depressurized by the expansion valve 7, the refrigerant pressure and temperature are further reduced before entering the condenser tube 3, where it releases heat and condenses into a liquid state. It then flows into the second refrigerant transfer tank 8 and finally returns to the compressor 5. This cycle repeats continuously, ensuring that the refrigerant can circulate continuously and stably within the evaporator, maintaining a stable refrigeration effect and providing a reliable and continuous low-temperature environment for the low-temperature evaporation process.

[0049] In this cyclic system, all components work together to optimize the refrigerant's state changes and heat transfer process, thereby improving refrigeration efficiency. Compressor 5 provides the refrigerant with suitable pressure and temperature through a reasonable compression ratio, allowing it to fully absorb heat and evaporate in evaporator 4. Expansion valve 7 precisely controls the refrigerant's throttling and pressure reduction process, ensuring that the refrigerant entering condenser 3 can efficiently release heat and condense under suitable conditions. Throughout the cycle, the heat exchange between the refrigerant and components such as evaporator 4 and condenser 3 under different states is more thorough and rational, reducing energy loss and waste, improving energy utilization efficiency, and enabling the evaporator to achieve more efficient low-temperature evaporation operation with relatively less energy consumption, thus reducing operating costs.

[0050] Furthermore, the top of the heat exchange chamber 101 has a negative pressure port 104, and also includes a condenser 9. The negative pressure port 104 leads to the condenser 9, the condenser 9 leads to the vacuum pump 10, the vacuum pump 10 leads to the water tank 11, and the liquid outlet 103 also leads to the water tank 11.

[0051] In this embodiment, a negative pressure port 104 is provided at the top of the heat exchange chamber 101, and through its connection with the condenser 9 and the vacuum pump 10, a negative pressure environment can be created within the heat exchange chamber 101. Under negative pressure, the boiling point of the liquid decreases, which is significant for low-temperature evaporators. Liquids that originally required higher temperatures to evaporate can evaporate at relatively lower temperatures in a negative pressure environment, making the evaporation process easier and faster, thereby effectively improving the evaporation efficiency of the evaporator and reducing energy consumption. This is especially suitable for the evaporation treatment of some heat-sensitive substances, avoiding the impact of high temperatures on their quality and ensuring the quality and effect of the evaporation treatment.

[0052] The negative pressure environment alters the physical conditions within the heat exchange chamber 101, further optimizing the heat exchange process. Due to the lower boiling point of the liquid, the heat transferred from the evaporator tube 4 to the liquid more efficiently promotes its conversion into vapor. Simultaneously, the vapor flows more easily within the chamber under negative pressure, facilitating more thorough heat exchange with components such as the condenser tube 3. This results in a smoother and more efficient heat exchange process, better leveraging the synergistic effect between components and further enhancing the overall heat exchange performance of the integrated low-temperature evaporator, thereby improving the equipment's operating efficiency.

[0053] The condenser 9 is located between the negative pressure port 104 and the vacuum pump 10. Its main function is to condense the steam and other gases extracted from the heat exchange chamber 101. Under negative pressure, some of the steam, water vapor, and other condensable gases that may be entrained in the heat exchange chamber 101 are drawn into the condenser 9. The condenser 9 uses an internal cooling medium (such as cooling water) to condense these gaseous substances into liquids by releasing heat upon cooling. This achieves effective recovery and state transformation of the gaseous substances, preventing them from directly entering the vacuum pump 10 and affecting its normal operation. It also enables the recycling of some substances, reduces material loss, and improves the economy of the entire system.

[0054] The vacuum pump 10 is the core power device for maintaining the negative pressure environment. It continuously extracts gas from the heat exchange chamber 101 and related connecting pipes, reducing the gas pressure within the system and thus ensuring the stable existence of the negative pressure environment. Simultaneously, the vacuum pump 10 and the condenser 9 work together. The vacuum pump 10 provides the power for gas extraction, while the condenser 9 pre-treats the extracted gas to prevent condensable gases from entering the vacuum pump 10 and causing blockages, corrosion, or other problems. This extends the service life of the vacuum pump 10 and ensures the stable operation of the entire negative pressure system. Working together, they maintain a suitable negative pressure state within the heat exchange chamber 101, ensuring the efficient and stable operation of the evaporator.

[0055] Furthermore, the liquid collection plate 2 also has a heat insulation cavity 202 and a heat insulation layer 12, which is disposed inside the heat insulation cavity 202.

[0056] In this embodiment, the liquid collecting plate 2 is provided with a heat insulation cavity 202 and filled with a heat insulation layer 12, which can effectively block the transfer of heat in unnecessary directions. In the integrated low-temperature evaporator, the evaporation tube 4 is located below the liquid collecting plate 2 to provide heat to promote liquid evaporation, while the condenser tube 3 is located above the liquid collecting plate 2 to condense the vapor. Under normal circumstances, it is desirable for heat to flow in a predetermined direction, that is, from the evaporation tube 4 to the liquid to be evaporated, and then from the vapor to the condenser tube 3. The heat insulation layer 12 can prevent heat from being transferred back from the area where the condenser tube 3 is located to the side of the evaporation tube 4, avoiding ineffective heat circulation, so that the heat generated by the evaporation tube 4 can be more concentrated for liquid evaporation, and the heat absorbed by the condenser tube 3 can be better dissipated outward, thereby optimizing the heat transfer path in the entire heat exchange cavity 101, improving the efficiency of heat exchange, and enabling the evaporator to complete the low-temperature evaporation task more efficiently.

[0057] The insulation cavity 202 and the insulation layer 12 help maintain a relatively stable temperature difference between the area where the evaporator tube 4 is located and the area where the condenser tube 3 is located. During the operation of the evaporator, different areas need to maintain specific temperature conditions to ensure the smooth progress of evaporation and condensation. For example, the temperature around the evaporator tube 4 should be relatively high to achieve liquid evaporation, while the temperature around the condenser tube 3 needs to be lower to facilitate steam condensation. The insulation layer 12 can reduce thermal interference between adjacent areas, allowing each area to better maintain its own suitable temperature range, further ensuring the orderly progress of phase changes within the evaporator, improving overall performance, and reducing problems such as poor evaporation or condensation effects caused by temperature interactions.

[0058] Because the insulation layer 12 prevents heat loss and reverse transfer, the heat provided by the evaporator tube 4 can be utilized more fully, reducing the need for additional heat to be supplied due to heat loss. During long-term operation, this means a reduction in the energy input required to maintain evaporation, such as reducing the amount of heating medium used, thereby lowering the overall operating cost of the evaporator, improving energy efficiency, and meeting energy conservation and emission reduction requirements. This reduction in energy consumption can bring considerable economic benefits, especially for low-temperature evaporation equipment that requires long-term continuous operation.

[0059] By optimizing heat transfer and utilization through the insulation layer 12, the overall energy efficiency ratio of the evaporator is improved. Under the same evaporation capacity and requirements, the evaporator can complete the work with less energy consumption, making the equipment more efficient and rational in energy utilization, and further enhancing its competitiveness in the market.

[0060] Furthermore, the condenser tube 3 is arranged in an elliptical shape, the liquid collection plate 2 is arc-shaped, and the guide groove 201 is located in the middle of the liquid collection plate 2.

[0061] In this embodiment, the condenser tube 3 adopts an elliptical layout, which significantly increases its surface area within the heat exchange chamber 101 compared to traditional straight or other simple shapes. During evaporator operation, when steam contacts the condenser tube 3 for heat exchange, the larger surface area means more contact points and contact area available for heat transfer. This allows for more efficient transfer of heat from the steam to the cooling medium inside the condenser tube 3, thereby accelerating steam condensation and improving the condensation effect. Simultaneously, this also ensures more thorough heat exchange within the entire heat exchange chamber 101, optimizing the overall heat exchange efficiency of the evaporator. This helps process more liquid to be evaporated per unit time, improving the equipment's working capacity and production efficiency.

[0062] The liquid collecting plate 2 is designed in an arc shape with the guide groove 201 located in the middle, which can be well adapted to and work together with the elliptical condenser tube 3. The arc shape of the liquid collecting plate 2 can better fit the shape of the condenser tube 3, so that the liquid condensed from the condenser tube 3 can more smoothly converge along the arc surface of the liquid collecting plate 2 into the guide groove 201 in the middle. This reduces the resistance and accumulation of liquid during the flow process, and ensures that the liquid can flow quickly and orderly through the guide groove 201 to the liquid outlet 103. This further optimizes the liquid flow process in the entire evaporator, improves the smoothness of equipment operation, and also enables the heat exchange process to proceed continuously and stably, enhancing the overall collaborative performance of the equipment.

[0063] The arc-shaped liquid collecting plate 2 inherently guides liquid flow, allowing the liquid generated within the heat exchange chamber 101 (including condensed liquid from the condenser tube 3 and other possible condensates) to converge along its arc-shaped surface. Compared to a flat liquid collecting plate, this arc-shaped structure better conforms to the natural flow of liquid, preventing disordered flow and accumulation. The centrally located guide channel 201 further clarifies the liquid's convergence direction and outflow path, enabling more precise and concentrated flow to the outlet 103. This ensures a more rational and efficient flow path within the evaporator, improving liquid processing efficiency and reducing potential corrosion and blockages caused by liquid residue or poor flow, thus extending the equipment's lifespan.

[0064] The arc-shaped structure of the liquid collecting plate 2, combined with the central guide groove 201, enhances the liquid collection capacity. During evaporator operation, whether the liquid drips from the upper condenser tube 3 or condensates formed within the cavity due to other reasons, it is more easily captured by the arc-shaped liquid collecting plate 2 and guided into the guide groove 201. This prevents the liquid from scattering randomly within the heat exchange chamber 101 and becoming difficult to collect, making the evaporator's liquid collection and processing more comprehensive and thorough. This ensures the continuity and stability of the entire evaporation process, facilitating the evaporator's continuous and stable functioning.

[0065] Furthermore, the width of the liquid collection plate 2 is greater than the maximum condensation width after the condenser tube 3 is installed.

[0066] In this embodiment, the width of the liquid collecting plate 2 is greater than the maximum condensation width of the condenser tube 3 after installation, enabling the liquid collecting plate 2 to fully cover the condenser tube 3 in the horizontal direction. During the operation of the evaporator, the condenser tube 3 condenses the steam into a liquid state, and this liquid substance flows down the outer wall of the condenser tube 3. The wider liquid collecting plate 2 ensures that the condensate generated at any part of the condenser tube 3 can be caught and collected by the liquid collecting plate 2, avoiding the situation where some condensate drips to other positions in the heat exchange chamber 101 due to insufficient width of the liquid collecting plate 2, resulting in incomplete liquid collection or random flow in the chamber, which could affect the normal operation of the equipment or cause corrosion problems. This ensures the effective collection of liquid in the evaporator and the smooth progress of subsequent processing.

[0067] Under different operating conditions, such as varying steam flow rates, temperatures, and changes in the working state of condenser tube 3, the condensation range and condensate distribution of condenser tube 3 may differ. The wider design of the collection plate 2 can adapt well to these changes. Even if the condensation range of condenser tube 3 expands or the condensate dripping point shifts under certain special circumstances, the collection plate 2 can still properly collect the condensate due to its sufficient width. This ensures that the evaporator can stably complete the liquid collection work under various complex operating conditions, improving the adaptability and reliability of the equipment to different working environments.

[0068] The wider collecting plate 2 provides a wider flow surface for the condensate, allowing the condensate flowing down from the condenser tube 3 to more smoothly converge on the collecting plate 2 into the guide channel 201. Compared to a collecting plate with insufficient width, the condensate will not accumulate or overflow due to limited space, but will flow naturally towards the guide channel 201 in the center according to the arc-shaped surface of the collecting plate 2 (if the collecting plate 2 is arc-shaped). This reduces the resistance to liquid flow, further optimizes the liquid convergence process on the collecting plate 2, and ensures that the liquid can flow quickly and orderly through the guide channel 201 to the outlet 103, improving the efficiency and stability of liquid flow within the evaporator.

[0069] Because the collection plate 2 is wide enough, even if a small amount of impurities mix into the condensate or factors such as equipment vibration affect the evaporator during long-term operation, it is not easy to cause significant disturbances or interruptions in the liquid flow. The wider collection plate 2 can buffer the impact of these adverse factors on the liquid flow to a certain extent, maintaining a relatively stable flow state of the liquid on the collection plate 2. This makes the liquid handling process within the entire evaporator more stable and reliable, and helps to improve the overall working performance and service life of the equipment.

[0070] Furthermore, the condenser tube 3 is a two-pass heat exchange tube, and the evaporator tube 4 is a four-pass evaporator tube.

[0071] In this embodiment, the condenser tube 3 is designed as a two-way heat exchange tube, which means that the flow path of the refrigerant in the condenser tube 3 is longer, and the contact time for heat exchange with the external steam is correspondingly increased. When the evaporator is running, the steam contacts the outer wall of the condenser tube 3, and the heat is transferred to the refrigerant inside the tube through the tube wall. The two-way structure allows the steam to have more opportunities and longer time to transfer heat, thereby improving the efficiency of steam condensation, enabling the steam to be converted into liquid more quickly, optimizing the condensation process in the entire evaporator, ensuring that the evaporator can process more steam per unit time, and improving the working capacity of the equipment.

[0072] Similarly, the evaporator tube 4 adopts a four-pass evaporator tube 4 structure, which greatly increases the heat exchange path between the liquid to be evaporated and the heating medium (such as hot steam, hot oil, etc.) inside the tube. The liquid can continuously absorb heat for a longer period of time, making fuller use of the heat carried by the heating medium to achieve evaporation, effectively improving the evaporation efficiency of the liquid, accelerating the evaporation speed, and thus improving the overall heat exchange efficiency of the entire low-temperature evaporator. Under the same energy consumption, it can achieve a larger scale of low-temperature evaporation treatment, enhancing the production efficiency of the equipment.

[0073] For the two-pass heat exchange condenser tube 3 and the four-pass evaporator tube 4, the advantages of counter-current heat exchange are even more pronounced. Counter-current heat exchange allows the two fluids to maintain a large temperature difference throughout the entire heat exchange process, further enhancing the driving force of heat transfer and making heat exchange more complete and efficient. In this case, the refrigerant in the condenser tube 3 can contact the relatively low-temperature vapor at the inlet. As the refrigerant flows, its temperature gradually increases, and the temperature of the vapor it comes into contact with also gradually increases, maintaining a large temperature difference and maximizing the use of the temperature difference for heat transfer. The same applies to the evaporator tube 4. This counter-current heat exchange combined with the multi-pass structure further improves the heat exchange efficiency, making the evaporator's performance even more outstanding.

[0074] The multi-pass design of condenser tube 3 and evaporator tube 4 extends the heat exchange path and time, allowing for more efficient heat utilization. During condensation, as much heat as possible is transferred to the refrigerant, reducing direct heat loss to the environment. During evaporation, the heat carried by the heating medium is transferred more efficiently to the liquid being evaporated, avoiding energy waste due to insufficient heat exchange. This means that to achieve the same evaporation and condensation effect, the required energy input is relatively reduced, improving energy utilization efficiency, lowering equipment operating costs, and aligning with the industrial development trend of energy conservation and emission reduction. For long-term operation of low-temperature evaporators, this can bring considerable economic benefits.

[0075] Furthermore, the liquid collecting plate 2 also has a collection groove 203, which is a plurality of grooves. The plurality of collection grooves 203 are symmetrically arranged along the guide groove 201, and the collection grooves 203 and the guide groove 201 are arranged at an acute angle.

[0076] In this embodiment, the collection plate 2 is equipped with several collection channels 203, which are symmetrically arranged along the guide channel 201, greatly increasing the collection range and efficiency of liquids such as condensate. During the operation of the evaporator, the condensate flowing down from the condenser tube 3 and the liquid generated in other parts of the heat exchange chamber 101 can be collected from different directions by multiple collection channels 203. This avoids the situation where the liquid is dispersed and difficult to converge on the collection plate 2, ensuring that more liquid can be collected in time, reducing the phenomenon of liquid residue or random flow on the surface of the collection plate 2, ensuring the comprehensiveness and integrity of liquid collection, and further improving the efficiency of liquid processing by the evaporator.

[0077] The collection trough 203 and the guide trough 201 are set at an acute angle. This angle design allows the liquid collected in the collection trough 203 to flow more smoothly and naturally into the guide trough 201 along this inclined angle. Compared to right angles or obtuse angles, which are not conducive to liquid flow, the acute angle design conforms to the natural flow characteristics of liquid under the action of gravity, reduces the resistance of the liquid during the flow process, and allows the liquid to quickly and orderly converge into the guide trough 201. This ensures a more reasonable and efficient flow path of the liquid on the collection plate 2, avoids problems such as accumulation and blockage caused by poor liquid flow, maintains the stability of liquid flow in the evaporator, and helps to improve the overall working performance of the equipment.

[0078] By collecting liquid in a timely and effective manner through the collection tank 203 and guiding it into the guide tank 201, it is possible to prevent liquid from accumulating on the collection plate 2 and covering key heat exchange areas such as the condenser tube 3, thereby avoiding the normal operation of heat exchange due to the presence of liquid.

[0079] Multiple collection channels 203 collect and guide the liquid in an orderly manner, helping to maintain a relatively stable heat exchange environment around the liquid collection plate 2 and throughout the heat exchange chamber 101. The orderly flow and timely treatment of the liquid avoid temperature fluctuations and local thermal environment changes caused by uneven liquid distribution and turbulent flow, enabling components such as the evaporator tube 4 and condenser tube 3 to operate under relatively stable temperature and humidity conditions. This reduces the impact of environmental changes on the heat exchange effect, ensures the heat exchange stability of the evaporator during long-term operation, and further improves the reliability and durability of the equipment.

[0080] Furthermore, the depth of the collecting channel 203 gradually increases from both sides of the liquid collecting plate 2 to the guiding channel 201.

[0081] In this embodiment, the depth of the collecting trough 203 gradually increases from both sides of the liquid collecting plate 2 to the guiding trough 201. This gradual depth design conforms to the natural convergence of liquids and can more effectively guide the liquids located at different positions on the liquid collecting plate 2 to flow into the guiding trough 201. During the operation of the evaporator, the liquid generated from the condenser tube 3 and the periphery of the liquid collecting plate 2, regardless of its initial position on either side of the liquid collecting plate 2, will converge towards the guiding trough 201 under the action of gravity along the gradually increasing depth of the collecting trough 201. This reduces the dispersion, residue, or stagnation of liquid on the liquid collecting plate 2, further enhancing the liquid collection capacity and ensuring that more liquid can be collected in a timely and comprehensive manner and introduced into the guiding trough 201, thereby improving the efficiency and integrity of liquid treatment within the evaporator.

[0082] The gradual depth creates smoother flow conditions for the liquid. Compared to a collection tank 203 of uniform depth, when the liquid flows in the collection tank 203, which gradually deepens, its flow velocity gradually increases due to the change in the slope at the bottom, and the flow direction is more clearly directed towards the guide channel 201. This natural acceleration and guiding effect makes the liquid flow more smoothly in the collection tank 203, reducing problems such as liquid accumulation and turbulence caused by flow resistance or unstable direction. It ensures that the liquid can flow quickly and orderly through the guide channel 201 to the outlet 103, optimizes the liquid flow path in the entire evaporator, improves the stability and smoothness of liquid flow, and helps to improve the overall working performance of the equipment.

[0083] The gradually increasing depth of the collecting trough 203 effectively prevents backflow of liquid. During evaporator operation, unstable forces may act on the liquid due to equipment vibration, steam flow, and other factors. If the depth of the collecting trough 203 is uniform or unreasonable, the liquid may flow backward under these external forces, returning to the area it originally flowed through on the collecting plate 2, affecting the efficiency and accuracy of liquid collection. The gradually increasing depth of the collecting trough 203, with its reasonable slope, makes it more difficult for the liquid to overcome this slope and flow backward under gravity. This ensures that once the liquid enters the collecting trough 203, it flows continuously towards the guiding trough 201, maintaining the unidirectional nature of liquid collection and guidance, and guaranteeing the normal operation of the liquid treatment process.

[0084] As liquid flows into the collection trough 203, the gradual increase in depth allows for a smoother flow along the bottom of the trough, reducing the likelihood of splashing due to sudden changes in drop or flow obstruction. If liquid splashes onto other parts of the collection plate 2 or other components of the heat exchange chamber 101, it can lead to incomplete collection, affect the heat exchange process, or cause corrosion to other components. The gradual depth design reduces the possibility of splashing, ensuring the liquid can safely and stably converge into the guide trough 201, further improving the evaporator's liquid handling quality and operational stability.

[0085] Furthermore, it also includes a thermostatic tube 13, which is disposed between the heat insulation layer 12 and the inner wall of the heat insulation cavity 202, and is used to cool the upper surface of the liquid collection plate 2.

[0086] In this embodiment, the thermostatic tube 13 is disposed between the insulation layer 12 and the inner wall of the insulation cavity 202, and is specifically used to cool the upper surface of the liquid collection plate 2, enabling precise temperature regulation of this part of the liquid collection plate 2. During the operation of the integrated low-temperature evaporator, the upper surface of the liquid collection plate 2 is affected by heat transfer from the condenser tube 3 above and the surrounding steam environment. Through the cooling effect of the thermostatic tube 13, its temperature can be controlled within a suitable range, ensuring that its temperature is neither too high, affecting the condensation effect of the condenser tube 3, nor too low, affecting the normal flow and convergence of liquid on the liquid collection plate 2, thereby optimizing the heat exchange environment in the entire evaporator and ensuring the stable and efficient operation of the heat exchange process in each stage.

[0087] The cooling effect of the thermostatic tube 13 helps to enhance the directionality of heat exchange. When the evaporator is working normally, it is desirable for heat to flow in an orderly manner from the evaporation tube 4 to the liquid to be evaporated, then to the steam, and finally to the condenser tube 3. The cooling effect of the thermostatic tube 13 on the upper surface of the liquid collection plate 2 makes the heat more inclined to be transferred from the evaporation area below the liquid collection plate 2 to the condensation area where the condenser tube 3 is located. This reduces the possibility of reverse heat transfer on the upper surface of the liquid collection plate 2, further optimizes the heat exchange path, improves the heat exchange efficiency, and enables the evaporator to achieve a more efficient low-temperature evaporation and condensation process with less energy consumption, thereby improving the overall working performance of the equipment.

[0088] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An integrated low-temperature evaporator, characterized in that, include: An evaporator (1) has a heat exchange chamber (101) with a liquid inlet (102) and a liquid outlet (103), the liquid inlet (102) and the liquid outlet (103) being located at the front and rear sides of the heat exchange chamber (101), respectively. The liquid collecting plate (2) is located in the middle of the heat exchange chamber (101) and above the liquid inlet (102). The liquid collecting plate (2) has a guide groove (201) that leads to the liquid outlet (103). Condenser (3), the condenser (3) is disposed in the heat exchange chamber (101) and located above the liquid collection plate (2); Evaporation tube (4) is disposed in the heat exchange chamber (101) and located below the liquid collection plate (2).

2. The integrated low-temperature evaporator according to claim 1, characterized in that, Also includes: The compressor (5) is located on one side of the evaporator (1) and leads to the evaporator tube (4). First refrigerant transfer tank (6), the evaporator pipe (4) leads to the first refrigerant transfer tank (6). Expansion valve (7), the first refrigerant transfer tank (6) leads to the expansion valve (7), and the expansion valve (7) leads to the condenser (3); The second refrigerant transfer tank (8) is connected to the condenser pipe (3), and the second refrigerant transfer tank (8) is connected to the compressor (5).

3. The integrated low-temperature evaporator according to claim 1, characterized in that, The heat exchange chamber (101) has a negative pressure port (104) at its top and also includes: Condenser (9), the negative pressure port (104) leads to the condenser (9); Vacuum pump (10), the condenser (9) is connected to the vacuum pump (10). Water tank (11), the vacuum pump (10) is connected to the water tank (11), and the liquid outlet (103) is also connected to the water tank (11).

4. The integrated low-temperature evaporator according to claim 1, characterized in that, The liquid collecting plate (2) also has a heat insulation cavity (202), and further includes: A heat insulation layer (12) is disposed inside the heat insulation cavity (202).

5. The integrated low-temperature evaporator according to claim 1, characterized in that, The condenser tube (3) is arranged in an elliptical shape, the liquid collection plate (2) is arc-shaped, and the guide groove (201) is located in the middle of the liquid collection plate (2).

6. The integrated low-temperature evaporator according to claim 1, characterized in that, The width of the liquid collection plate (2) is greater than the maximum condensation width of the condenser tube (3) after installation.

7. The integrated low-temperature evaporator according to claim 1, characterized in that, The condenser tube (3) is a two-pass heat exchange tube, and the evaporator tube (4) is a four-pass evaporator tube (4).

8. The integrated low-temperature evaporator according to claim 1, characterized in that, The liquid collection plate (2) also has a collection groove (203), and there are several collection grooves (203). The several collection grooves (203) are symmetrically arranged along the guide groove (201) and lead to the guide groove (201). The collection grooves (203) and the guide groove (201) are arranged at an acute angle.

9. The integrated low-temperature evaporator according to claim 8, characterized in that, The depth of the collection channel (203) gradually increases from both sides of the liquid collection plate (2) toward the guide channel (201).

10. The integrated low-temperature evaporator according to claim 4, characterized in that, Also includes: Thermostatic tube (13) is disposed between the heat insulation layer (12) and the inner wall of the heat insulation cavity (202) for cooling the upper surface of the liquid collection plate (2).

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