Hot gas medium heat exchange method that facilitates condensate discharge

Abstract

This invention relates to the technical field of heat exchange equipment and discloses a heat exchange method for a hot gas medium that facilitates condensate discharge. The hot gas medium is discharged into a tank having an inlet chamber and an outlet chamber. One end of the tank has an inlet connector, and the other end has an outlet connector. A support plate is located within the tank. The support plate has a heat exchange core, which contains a hot channel and a cold channel. The hot channel extends upwards and downwards through the heat exchange core to form an inlet and an outlet. The inlet chamber has a heat-conducting zone. The outlet chamber has a drain port. As the hot gas medium flows towards the outlet in the hot channel, a cooling medium cools the hot gas medium, causing it to form a cold gas medium and condensate. The cold gas medium and condensate enter the outlet chamber through the outlet port, and the cold gas medium is discharged through the outlet connector, while the condensate is discharged through the outlet port. This simplifies the condensate discharge path, thereby improving heat exchange efficiency and long-term operational stability.

Description

Technical Field

[0001] This invention relates to the technical field of heat exchange equipment, and more specifically, to a heat exchange method for a hot gas medium that facilitates condensate discharge. Background Technology

[0002] The application of heat exchange equipment, such as in the treatment of volatile organic compounds (VOCs), involves condensing VOCs into liquids through heat exchange equipment to achieve resource recovery. However, whether the condensate can be easily discharged during the VOCs heat exchange process is a crucial factor.

[0003] In the existing technology, the isolation design of the hot and cold channels is relatively complex, resulting in insufficient flow guidance, uneven distribution of hot gas medium, and excessive local condensation effect. In particular, the uneven condensation effect not only reduces the heat exchange efficiency, but also easily causes local accumulation of condensate, which may lead to frost blockage or ice blockage, affecting the stability and service life of the equipment.

[0004] Furthermore, some drain outlets are often located on the side or top, without fully considering the gravity flow characteristics of the condensate. This prevents the condensate from draining smoothly, which can easily lead to leaks or corrosion and increase the complexity of installation and maintenance.

[0005] In addition, the distance between the drain outlet and the outlet of the cold gas medium is too close, which can easily interfere with condensate collection when the mixture is discharged. This not only increases the difficulty of condensate discharge, but also increases the maintenance cost of the equipment. Summary of the Invention

[0006] The purpose of this invention is to provide a heat exchange method for hot gas medium that facilitates condensate discharge, thereby solving the problem of inconvenient condensate discharge during the heat exchange process in the prior art.

[0007] This invention provides a heat exchange method for a hot gas medium that facilitates condensate discharge. The hot gas medium is discharged into a tank arranged in a strip shape. The tank has an inlet chamber and an outlet chamber inside, which are isolated from each other. The tank is arranged horizontally, with an inlet connector at one end and an outlet connector at the other end. The tank has a support plate that isolates the air inlet chamber from the air outlet chamber. The support plate is provided with a heat exchange core, which has a hot channel and a cold channel for the flow of the refrigerant medium. The hot channel and the cold channel are arranged adjacent to each other. The hot channel extends upward through the top of the heat exchange core to form an air inlet, and the hot channel extends downward through the bottom of the heat exchange core to form an air outlet. The air inlet chamber has a heat conduction zone located above the heat exchange core, the air inlet faces upward and communicates with the heat conduction zone, and the air inlet connector is arranged off-center from the heat conduction zone; the air outlet chamber is provided with a drain port, which is located at the bottom of the air outlet chamber; Hot gas medium enters the intake chamber through the intake connector, is guided to the hot gas conduction zone in the intake chamber, and then enters the hot channel through the intake port; as the hot gas medium in the hot channel flows toward the outlet, the cooling medium in the cold channel cools the hot gas medium, so that the hot gas medium forms a cold gas medium and condensate, the cold gas medium and condensate enter the outlet chamber through the outlet port, the cold gas medium is discharged through the outlet connector, and the condensate is discharged through the liquid outlet.

[0008] Furthermore, the heat exchange core includes multiple heat-conducting plates, one side of which has a cold surface and the other side of which has a hot surface. The multiple heat-conducting plates are stacked sequentially, with the hot surfaces of adjacent heat-conducting plates facing each other to form the heat channel, and the cold surfaces of adjacent heat-conducting plates facing each other to form the cold channel.

[0009] Furthermore, the heat exchange core has multiple hot channels and multiple cold channels formed therein; the heat exchange core is arranged horizontally, and along the horizontal direction of the heat exchange core, the hot channels and cold channels are arranged alternately in sequence, and the multiple hot channels are arranged independently of each other; the hot gas medium in the heat conduction zone enters the hot channels through multiple air inlets, and is then discharged into the air outlet chamber through multiple air outlets.

[0010] Furthermore, the upper parts of the plurality of cold channels are respectively connected to the liquid inlet pipe, and the lower parts of the plurality of cold channels are respectively connected to the liquid outlet pipe. A refrigeration device for cooling the refrigeration medium is connected between the liquid inlet pipe and the liquid outlet pipe. The liquid inlet pipe, the plurality of cold channels, the liquid outlet pipe and the refrigeration device form a circulating flow structure. During the process of the hot gas medium flowing in the hot channel, the refrigeration medium circulates in the circulating flow structure.

[0011] Furthermore, the air outlet chamber has a cold air guiding zone located below the heat exchange core, the air outlet faces downward and communicates with the cold air guiding zone, and the air outlet connector is arranged off-center from the cold air guiding zone; the cold gas medium discharged from the air outlet of the hot channel enters the cold air guiding zone, then flows from the cold air guiding zone to the air outlet connector, and is discharged from the air outlet chamber through the air outlet connector.

[0012] Furthermore, the support plate includes a central plate, which is located in the middle of the tank. The hot air conduction zone is located above the central plate, and the cold air conduction zone is located below the central plate. The central plate has a hollowed-out area that runs vertically through it. The heat exchange core is installed on the hollowed-out area. The air inlet is located in the hot air conduction zone and communicates with it. The air outlet is located in the cold air conduction zone and communicates with it.

[0013] Furthermore, the two ends of the middle plate are respectively provided with sealing plates, the two sealing plates are staggered vertically, and the sealing plates are offset from the end of the tank; the air inlet chamber has an air inlet area, the air inlet area is located between the sealing plate and the end of the tank, and the air inlet is connected to the air inlet area; the hot gas medium enters the air inlet area through the air inlet, the hot gas medium is blocked by the sealing plate, flows to the heat conduction area, and enters the heat channel from top to bottom from the heat conduction area.

[0014] Furthermore, the air outlet chamber has an air outlet area located between the end of the sealing plate and the tank body, and the air outlet is connected to the air outlet area; the cold gas medium enters the cold gas guiding area from top to bottom through the hot channel, is blocked by the sealing plate, the cold gas medium flows to the air outlet area, and is then discharged from the air outlet.

[0015] Furthermore, a plurality of protrusions are provided on the hot surface, the protrusions are arranged in an array on the hot surface, and there is a hot surface recess area between adjacent protrusions. The hot surface recess area has a top opening, and the diameter of the hot surface recess area is smaller than the diameter of the protrusion. The protrusions between the two hot surfaces are staggered. Between the two hot surfaces arranged opposite each other, the protrusions abut against the top opening of the hot surface recess area. The outer periphery of the protrusions is formed with multiple peripheral notches. The hot channel includes multiple curved flow channels. The flow channels are formed between adjacent protrusions and are connected to the recess area through the peripheral notches. As the hot gas medium enters multiple channels through the inlet and flows toward the outlet, it enters the recessed area through the outer peripheral notch, forming a swirling flow.

[0016] Furthermore, a central channel is provided in the middle of the cold surface, and side channels are formed on both sides of the cold surface. The central channel and the side channels extend from the height direction of the heat exchange core. Multiple inclined channels are formed between the central channel and the side channels, and the central channel is connected to the side channels through the inclined channels. The top of the central channel and the tops of the two side channels converge and connect to form a top connection position, and the liquid inlet pipe is connected to the top connection position; the bottom of the central channel and the bottoms of the two side channels converge and connect to form a bottom connection position, and the liquid outlet pipe is connected to the bottom connection position; multiple grooves are formed on the cold surface, and the multiple grooves are aligned with the multiple protrusions. The refrigerant enters the top connection position through the inlet pipe and flows toward the middle channel and the side guide channel. As the refrigerant flows toward the bottom connection position, it flows in the inclined channel and fills the groove. The refrigerant in the bottom connection position collects and enters the outlet pipe, flowing toward the refrigeration equipment.

[0017] Compared with the prior art, the hot gas medium heat exchange method for facilitating condensate discharge provided by the present invention, when the strip-shaped tank is horizontally positioned, has its internal air inlet and outlet chambers isolated by a support plate, ensuring that hot and cold gases flow in an orderly manner without interfering with each other, thus providing a structural guarantee for the smooth discharge of condensate.

[0018] The drain outlet is located at the bottom of the air outlet chamber, which utilizes the gravity properties of the condensate to allow the condensed liquid to drain naturally and quickly, avoiding poor drainage caused by improper drain outlet location.

[0019] The layout of the air inlet connector, which is offset from the hot air conduction zone, optimizes the distribution of the hot gas medium, reduces excessive local condensation effect and condensate accumulation, and further improves heat exchange efficiency. At the same time, the hot aisle and cold aisle are arranged adjacent to each other, which allows the refrigerant in the cold aisle to efficiently cool the hot gas, and the generated condensate is smoothly discharged through the drain port, simplifying the condensate discharge path, thereby improving heat exchange efficiency and long-term operational stability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the tank interior of the hot gas medium heat exchange method for facilitating condensate discharge provided by the present invention. Figure 2 This is a cross-sectional schematic diagram of the heat exchange core provided by the present invention; Figure 3 This is a cross-sectional schematic diagram of the heat-conducting sheet provided by the present invention; Figure 4 This is a cross-sectional schematic diagram of the cold surface provided by the present invention; In the diagram: Tank 100, Air inlet 101, Air outlet 102, Hot air conduction zone 103, Cold air conduction zone 104, Air inlet zone 105, Air outlet zone 106, Drain 107. Heat exchange core 200, hot channel 201, cold channel 202, air inlet 203, air outlet 204, middle plate 205, sealing plate 206. Heat-conducting plate 300, hot surface 301, protrusion 302, hot surface recessed area 303, peripheral notch 304; Cold surface 400, middle channel 401, side channel 402, inclined channel 403, top connecting position 404, bottom connecting position 405, groove 406. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0023] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] Reference Figure 1-4 The image shows a preferred embodiment of the present invention.

[0025] A heat exchange method for hot gas medium that facilitates condensate discharge involves discharging the hot gas medium into a tank 100 arranged in a strip shape. The tank 100 has an inlet chamber and an outlet chamber inside, which are arranged in isolation from each other. The tank 100 is arranged in a horizontal position, with an inlet connector 101 at one end and an outlet connector 102 at the other end. The tank body 100 has a support plate that isolates the air inlet chamber from the air outlet chamber. The support plate is provided with a heat exchange core 200, which has a hot channel 201 and a cold channel 202 for the flow of the refrigerant medium. The hot channel 201 and the cold channel 202 are arranged adjacent to each other. The hot channel 201 extends upward through the top of the heat exchange core 200 to form an air inlet 203, and the hot channel 201 extends downward through the bottom of the heat exchange core 200 to form an air outlet 204. The air inlet chamber has a heat conduction zone 103 located above the heat exchange core 200, and the air inlet 203 faces upward and connects to the heat conduction zone 103. The air inlet connector 101 is arranged off-center from the heat conduction zone 103. The air outlet chamber is provided with a drain port 107, which is located at the bottom of the air outlet chamber. Hot gas medium enters the intake chamber through intake connector 101, is guided to the hot gas conduction zone 103 in the intake chamber, and then enters the hot channel 201 through intake port 203. As the hot gas medium in the hot channel 201 flows toward the outlet 204, the cooling medium in the cold channel 202 cools the hot gas medium, so that the hot gas medium forms cold gas medium and condensate. The cold gas medium and condensate enter the outlet chamber through outlet port 204. The cold gas medium is discharged through outlet connector 102, and the condensate is discharged through drain port 107.

[0026] The aforementioned heat exchange method for facilitating condensate discharge, when the strip-shaped tank 100 is horizontal, has its internal air inlet and outlet chambers isolated by a support plate, ensuring orderly flow of hot and cold gases without interference, thus providing structural protection for smooth condensate discharge.

[0027] The drain port 107 is located at the bottom of the air outlet chamber. It utilizes the gravity properties of the condensate to allow the condensed liquid to be discharged naturally and quickly, avoiding poor drainage caused by improper drain port location.

[0028] The placement of the air inlet connector 101 away from the heat conduction zone 103 optimizes the distribution of the hot gas medium, reduces excessive local condensation effect and condensate accumulation, and further improves heat exchange efficiency. At the same time, the hot channel 201 and the cold channel 202 are arranged adjacent to each other, which allows the refrigerant in the cold channel 202 to efficiently cool the hot gas, and the generated condensate is smoothly discharged through the drain port 107, simplifying the condensate discharge path, thereby improving heat exchange efficiency and long-term operational stability.

[0029] In this embodiment, the heat exchange core 200 includes a plurality of heat-conducting plates 300. One side of each heat-conducting plate 300 has a cold surface 400, and the other side of each heat-conducting plate 300 has a hot surface 301. The plurality of heat-conducting plates 300 are stacked sequentially, and the hot surfaces 301 of adjacent heat-conducting plates 300 are arranged facing each other to form a heat channel 201. The cold surfaces 400 of adjacent heat-conducting plates 300 are arranged facing each other to form a cold channel 202.

[0030] By stacking multiple heat-conducting plates 300, a mutually isolated and efficient hot channel 201 and cold channel 202 are formed. When the hot gas medium flows in the hot channel 201, it exchanges heat efficiently with the cooling medium in the cold channel 202 through the heat-conducting plates 300. The hot surface 301 and cold surface 400 of adjacent heat-conducting plates 300 are arranged facing each other, which enables the heat exchange core 200 to achieve a larger heat exchange area in a limited space, improves the heat exchange efficiency, and at the same time, can evenly distribute the hot gas medium, reduce local overheating or overcooling, and enhance the stability of the heat exchange process.

[0031] In this embodiment, the heat exchange core 200 has multiple hot channels 201 and multiple cold channels 202. The heat exchange core 200 is arranged horizontally. Along the horizontal direction of the heat exchange core 200, the hot channels 201 and cold channels 202 are arranged alternately in sequence, and the multiple hot channels 201 are arranged independently of each other. The hot gas medium of the heat conduction zone 103 enters the hot channel 201 through multiple air inlets 203, and is then discharged into the air outlet chamber through multiple air outlets 204.

[0032] By alternating the arrangement of hot channels 201 and cold channels 202, and with the hot channels 201 being independent of each other, the hot gas medium can be evenly distributed throughout the heat exchange core 200. During the heat exchange process, the hot gas medium enters each hot channel 201 from the heat conduction zone 103 through multiple air inlets 203. After sufficient heat exchange, it is discharged to the air outlet chamber through multiple air outlets 204. This exchange method not only improves the uniformity of heat exchange, but also enhances the overall heat exchange efficiency and avoids excessive or insufficient local heat exchange.

[0033] In this embodiment, the upper parts of the multiple cold channels 202 are respectively connected to the liquid inlet pipe, and the lower parts of the multiple cold channels 202 are respectively connected to the liquid outlet pipe. A refrigeration device for cooling the refrigeration medium is connected between the liquid inlet pipe and the liquid outlet pipe. The liquid inlet pipe, the multiple cold channels 202, the liquid outlet pipe and the refrigeration device form a circulating flow structure. During the process of the hot gas medium flowing in the hot channel 201, the refrigeration medium circulates in the circulating flow structure.

[0034] The refrigerant circulates in this way: the inlet pipe delivers the low-temperature refrigerant after it has been cooled by the refrigeration equipment to the upper part of the cold channel 202. The refrigerant flows from top to bottom in the cold channel 202, absorbs heat and its temperature rises, and then returns to the refrigeration equipment through the outlet pipe for cooling again. This ensures the continuous and effective cooling of the refrigerant, improves the efficiency and stability of heat exchange, and also helps to maintain the temperature balance of the entire heat exchange.

[0035] In this embodiment, the air outlet chamber has a cold air guiding zone 104 located below the heat exchange core 200, the air outlet 204 faces downward and communicates with the cold air guiding zone 104, and the air outlet connector 102 is arranged off-center from the cold air guiding zone 104; the cold gas medium discharged from the air outlet 204 of the heat channel 201 enters the cold air guiding zone 104, and then flows from the cold air guiding zone 104 to the air outlet connector 102, and is discharged from the air outlet chamber from the air outlet connector 102.

[0036] This allows the cold gas medium to flow in an orderly manner in the outlet chamber. After the cold gas medium is discharged from the outlet 204 of the hot channel 201, it first enters the cold gas guide zone 104, then flows to the off-center outlet connector 102 and is discharged from the outlet chamber. This avoids the cold gas medium directly impacting the outlet connector 102, thereby reducing airflow disturbance and energy loss, and also helps to maintain stable pressure in the outlet chamber. In addition, the cold gas guide zone 104 helps to further reduce the temperature of the cold gas medium and improve the heat exchange effect.

[0037] In this embodiment, the support plate includes a middle plate 205, which is placed in the middle of the tank 100. The hot air conduction zone 103 is located above the middle plate 205, and the cold air conduction zone 104 is located below the middle plate 205. The middle plate 205 has a hollow area that runs vertically through it. The heat exchange core 200 is installed on the hollow area. The air inlet 203 is placed in the hot air conduction zone 103 and communicates with it. The air outlet 204 is placed in the cold air conduction zone 104 and communicates with it.

[0038] The middle plate 205 divides the internal space of the tank 100 into a hot gas conduction zone 103 and a cold gas conduction zone 104, providing clear flow paths for hot and cold gas media.

[0039] The heat exchange core 200 is installed on the hollow area of ​​the middle plate 205, so that the hot gas medium can enter the hot channel 201 from the hot gas conduction zone 103 through the air inlet 203. After heat exchange, the cold gas medium enters the cold gas conduction zone 104 through the air outlet 204 and is discharged. This not only improves the efficiency of heat exchange, but also enhances compactness and stability, and reduces mutual interference between different media.

[0040] In this embodiment, the two ends of the middle plate 205 are respectively provided with sealing plates 206, the two sealing plates 206 are staggered vertically, and the sealing plates 206 are arranged away from the end of the tank body 100; the air inlet chamber has an air inlet area 105, which is located between the sealing plate 206 and the end of the tank body 100, and the air inlet 203 is connected to the air inlet area 105; the hot gas medium enters the air inlet area 105 through the air inlet 203, and the hot gas medium is blocked by the sealing plate 206, flows to the heat conduction area 103, and enters the heat channel 201 from top to bottom from the heat conduction area 103.

[0041] Thus, due to the staggered arrangement of the sealing plate 206 and its offset from the end of the tank 100, after the hot gas medium enters the air inlet zone 105 from the air inlet 203, it is blocked by the sealing plate 206, changing its flow direction and flowing towards the heat conduction zone 103. This provides reasonable guidance for the hot gas medium to enter the heat conduction zone 103, distributing the hot gas medium evenly to various parts of the heat conduction zone 103, avoiding excessive concentration or dispersion of local airflow, thereby improving the uniformity and efficiency of heat exchange. Moreover, the arrangement of the sealing plate 206 also helps to reduce the leakage of the hot gas medium and improve the sealing performance.

[0042] In this embodiment, the air outlet chamber has an air outlet area 106, which is located between the end of the sealing plate 206 and the tank body 100. The air outlet 204 is connected to the air outlet area 106. The cold gas medium enters the cold gas guide area 104 from top to bottom through the hot channel 201. It is blocked by the sealing plate 206 and flows to the air outlet area 106, and then is discharged through the air outlet connector 102.

[0043] When the cold gas medium enters the cold gas guide zone 104 from the hot channel 201, it is blocked by the sealing plate 206 and flows to the gas outlet zone 106, and is finally discharged through the gas outlet connector 102. This is due to the guidance of the cold gas medium to make it flow in an orderly manner, reducing airflow turbulence and energy loss. At the same time, it also maintains the pressure balance in the gas outlet chamber. Furthermore, the blocking effect of the sealing plate 206 can also reduce the temperature of the cold gas medium and improve the heat exchange effect.

[0044] In this embodiment, a plurality of protrusions 302 are provided on the hot surface 301. The protrusions 302 are arranged in an array on the hot surface 301. There is a hot surface recess 303 between adjacent protrusions 302. The hot surface recess 303 has a top opening. The diameter of the hot surface recess 303 is smaller than the diameter of the protrusions 302. The protrusions 302 between the two hot surfaces 301 are staggered. Between the two hot surfaces 301 arranged opposite each other, the protrusions 302 abut against the top opening of the hot surface recess 303. Multiple peripheral notches 304 are formed on the outer periphery of the protrusions 302. The hot channel 201 includes multiple curved flow channels. The flow channels are formed between adjacent protrusions 302. The flow channels are connected to the recess through the peripheral notches 304. As the hot gas medium enters multiple flow channels through the inlet 203 and flows toward the outlet 204, it enters the recessed area through the outer peripheral notch 304, forming a swirling flow.

[0045] This swirling flow enhances the heat exchange between the hot gas medium and the heat-conducting plate 300, improving heat transfer efficiency. At the same time, the staggered arrangement of the protrusions 302 and the recessed areas helps to evenly distribute the hot gas medium, reduce local overheating, and enhance the uniformity and stability of heat exchange.

[0046] In addition, the multiple curved flow channels can increase the residence time of the hot gas medium in the hot channel 201, further improving the heat exchange effect.

[0047] In this embodiment, a central channel 401 is provided in the middle of the cold surface 400, and side channels 402 are formed on both sides of the cold surface 400. The central channel 401 and the side channels 402 are arranged to extend from the height direction of the heat exchange core 200. A plurality of inclined channels 403 are formed between the central channel 401 and the side channels 402, and the central channel 401 is connected to the side channels 402 through the inclined channels 403. The top of the central channel 401 connects with the tops of the two side channels 402 to form a top connection position 404, and the liquid inlet pipe connects with the top connection position 404; the bottom of the central channel 401 connects with the bottoms of the two side channels 402 to form a bottom connection position 405, and the liquid outlet pipe connects with the bottom connection position 405; multiple grooves 406 are formed on the cold surface 400, and the multiple grooves 406 are aligned with multiple protrusions 302. The refrigerant enters the top connection position 404 through the liquid inlet pipe and flows toward the middle channel 401 and the side guide channel. During the flow of the refrigerant toward the bottom connection position 405, it flows in the inclined channel 403 and fills the groove 406. The refrigerant in the bottom connection position 405 collects into the liquid outlet pipe and flows toward the refrigeration equipment.

[0048] The combination of the central channel 401, the side channel 402 and the inclined channel 403 provides a uniformly distributed flow path for the refrigerant. After the refrigerant enters the top connecting position 404 from the inlet pipe, it flows to the middle channel 401 and the side channel 402 respectively, and flows in the inclined channel 403, finally converging at the bottom connecting position 405 and being discharged. In this way, the refrigerant can fully cover all parts of the cold surface 400, improving the cooling effect of the cold surface 400. In addition, the groove 406 increases the contact area between the refrigerant and the cold surface 400, enhancing the heat exchange effect, which not only improves the cooling efficiency, but also enhances the stability and reliability.

[0049] The following section provides a detailed explanation of the specific implementation method of the heat exchange method for condensate discharge using a practical application scenario applicable to VOCs refrigeration systems.

[0050] A heat exchange method for hot gas medium that facilitates condensate discharge includes a set of horizontally placed strip-shaped tanks 100 (inner diameter φ600 mm, total length 1600 mm, wall thickness 6 mm, material S30408), both ends of which are sealed with elliptical heads (EHA600×6, same material) to form a pressure-bearing cavity.

[0051] The interior of the tank 100 is divided into two radially by the central plate 205: the upper part is the air inlet chamber and the lower part is the air outlet chamber, which are not connected to each other; the central plate 205 has a hollow area in the center, and the heat exchange core 200 (model can be ZY35-128, in two groups arranged horizontally) is embedded in the hollow area by a supporting bending plate (S30408, one end fixed by an M12×40 bolt, the other end is free to be placed) and the heat exchange core 200 is fully welded to the inside of the tank 100 by connecting plates (310mm×62mm×10mm and 310mm×93mm×10mm) to ensure absolute isolation between the hot and cold sides.

[0052] The heat exchange core 200 is composed of 128 heat-conducting plates 300 stacked together: adjacent hot surfaces 301 face each other to form a hot channel 201, and adjacent cold surfaces 400 face each other to form a cold channel 202; the hot channel 201 and the cold channel 202 are arranged alternately in the horizontal direction and are independent of each other.

[0053] Hot gas medium (VOCs) enters the inlet zone 105 from the inlet connector 101 (diameter DN150) at one end of the tank 100. After being blocked by the sealing plate 206, it is turned towards the heat conduction zone 103, and then evenly distributed to multiple hot channels 201 through each inlet 203. During the downward flow, it exchanges heat with the R507a refrigerant in the cold channel 202, the temperature decreases and condensate is precipitated.

[0054] The cold gas medium and condensate fall together from the gas outlet 204 into the cold gas guide zone 104. Then the cold gas turns to the gas outlet zone 106 and is finally discharged through the gas outlet connector 102 (diameter DN150). The condensate, under the action of gravity, gathers to the drain port 107 (diameter DN50) at the bottom of the tank 100 and is continuously discharged, completely eliminating the risk of liquid accumulation.

[0055] The refrigeration-side circulation is simple and reliable: the inlet pipe sends R507a refrigerant from the top connection position 404 to the middle channel 401 and two side channels 402. The R507a refrigerant flows down along the inclined channel 403 and fills the groove 406. After absorbing heat, it flows from the bottom connection position 405 to the outlet pipe and returns to the refrigeration equipment for cooling again, forming a closed loop.

[0056] The top of the tank 100 is equipped with a vacuum pump return port (diameter DN50) to maintain stable operating pressure; the bottom is equipped with a drain port (diameter DN200) to facilitate the drainage of residual liquid during shutdown maintenance.

[0057] Performance parameters: The entire set of horizontally placed strip tanks is designed according to GB / T150.1-2011. The cold and hot sides are subjected to air pressure tests of 2.2MPa and 0.11MPa respectively. The weld flaw detection meets NB / T47013.2-2015 AB level and NB / T47013.5-2015 I level. The design service life is 10 years.

[0058] Maintenance method: For routine maintenance, simply pump in 5% phosphoric acid or oxalic acid solution in reverse to clean the cold surface 400 and the hot surface 301 with 200 bar compressed air or high-pressure water to remove dry impurities. The operation is simple and suitable for VOCs condensation and recovery scenarios such as petrochemical and storage and transportation, achieving the dual goals of efficient heat exchange and immediate liquid drainage.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat exchange method for a hot gaseous medium that facilitates condensate discharge, characterized in that, The hot gas medium is discharged into a tank arranged in a strip shape. The tank has an inlet chamber and an outlet chamber inside, which are arranged in isolation from each other. The tank is arranged in a horizontal position. One end of the tank has an inlet connector and the other end has an outlet connector. The tank has a support plate that isolates the air inlet chamber from the air outlet chamber. The support plate is provided with a heat exchange core, which has a hot channel and a cold channel for the flow of the refrigerant medium. The hot channel and the cold channel are arranged adjacent to each other. The hot channel extends upward through the top of the heat exchange core to form an air inlet, and the hot channel extends downward through the bottom of the heat exchange core to form an air outlet. The air inlet chamber has a heat conduction zone located above the heat exchange core, the air inlet faces upward and communicates with the heat conduction zone, and the air inlet connector is arranged off-center from the heat conduction zone; the air outlet chamber is provided with a drain port, which is located at the bottom of the air outlet chamber; Hot gas medium enters the intake chamber through the intake connector, is guided to the hot gas conduction zone in the intake chamber, and then enters the hot channel through the intake port; as the hot gas medium in the hot channel flows toward the outlet, the cooling medium in the cold channel cools the hot gas medium, so that the hot gas medium forms a cold gas medium and condensate, the cold gas medium and condensate enter the outlet chamber through the outlet port, the cold gas medium is discharged through the outlet connector, and the condensate is discharged through the liquid outlet. The heat exchange core includes multiple heat-conducting plates, each heat-conducting plate having a cold surface on one side and a hot surface on the other side. The multiple heat-conducting plates are stacked sequentially, with the hot surfaces of adjacent heat-conducting plates facing each other to form the heat channel, and the cold surfaces of adjacent heat-conducting plates facing each other to form the cold channel. The air outlet chamber has a cold air guiding area located below the heat exchange core. The air outlet faces downward and connects to the cold air guiding area. The air outlet connector is arranged off-center from the cold air guiding area. The cold gas medium discharged from the air outlet of the hot channel enters the cold air guiding area, then flows from the cold air guiding area to the air outlet connector, and is discharged from the air outlet chamber through the air outlet connector. The support plate includes a middle plate, which is located in the middle of the tank. The hot air conduction zone is located above the middle plate, and the cold air conduction zone is located below the middle plate. The middle plate has a hollowed-out area that runs vertically through it. The heat exchange core is installed on the hollowed-out area. The air inlet is located in the hot air conduction zone and communicates with it. The air outlet is located in the cold air conduction zone and communicates with it. The hot surface is provided with a plurality of protrusions, which are arranged in an array on the hot surface. There is a hot surface recess between adjacent protrusions. The hot surface recess has a top opening and the diameter of the hot surface recess is smaller than the diameter of the protrusion. The protrusions between the two hot surfaces are staggered. Between the two hot surfaces arranged opposite each other, the protrusions abut against the top opening of the hot surface recess area. The outer periphery of the protrusions is formed with multiple peripheral notches. The hot channel includes multiple curved flow channels. The flow channels are formed between adjacent protrusions and are connected to the recess area through the peripheral notches. As the hot gas medium enters multiple channels through the inlet and flows toward the outlet, it enters the recessed area through the outer peripheral notch, forming a swirling flow.

2. The hot gas medium heat exchange method for facilitating condensate discharge as described in claim 1, characterized in that, The heat exchange core has multiple hot channels and multiple cold channels formed therein; the heat exchange core is arranged horizontally, and along the horizontal direction of the heat exchange core, the hot channels and cold channels are arranged alternately in sequence, and the multiple hot channels are arranged independently of each other; the hot gas medium in the heat conduction zone enters the hot channels through multiple air inlets, and is then discharged into the air outlet chamber through multiple air outlets.

3. The hot gas medium heat exchange method for facilitating condensate discharge as described in claim 1, characterized in that, The upper parts of the multiple cold channels are respectively connected to the liquid inlet pipe, and the lower parts of the multiple cold channels are respectively connected to the liquid outlet pipe. A refrigeration device for cooling the refrigeration medium is connected between the liquid inlet pipe and the liquid outlet pipe. The liquid inlet pipe, the multiple cold channels, the liquid outlet pipe and the refrigeration device form a circulating flow structure. During the process of the hot gas medium flowing in the hot channel, the refrigeration medium circulates in the circulating flow structure.

4. The hot gas medium heat exchange method for facilitating condensate discharge as described in claim 1, characterized in that, The middle plate has sealing plates at both ends, which are staggered vertically and offset from the end of the tank. The air inlet has an air inlet area located between the sealing plate and the end of the tank, and the air inlet is connected to the air inlet area. The hot gas medium enters the air inlet area through the air inlet. The hot gas medium is blocked by the sealing plate and flows to the heat conduction area, and then enters the heat channel from top to bottom through the heat conduction area.

5. The hot gas medium heat exchange method for facilitating condensate discharge as described in claim 4, characterized in that, The air outlet chamber has an air outlet area located between the end of the sealing plate and the tank body, and the air outlet is connected to the air outlet area. The cold gas medium enters the cold gas guide area from top to bottom through the hot channel. Due to the obstruction of the sealing plate, the cold gas medium flows to the air outlet area and is then discharged from the air outlet.

6. The hot gas medium heat exchange method for facilitating condensate discharge as described in claim 3, characterized in that, The cold surface has a central channel in the middle and side channels on both sides. The central channel and the side channels extend from the height of the heat exchange core. Multiple inclined channels are formed between the central channel and the side channels, and the central channel is connected to the side channels through the inclined channels. The top of the central channel and the tops of the two side channels converge and connect to form a top connection position, and the liquid inlet pipe is connected to the top connection position; the bottom of the central channel and the bottoms of the two side channels converge and connect to form a bottom connection position, and the liquid outlet pipe is connected to the bottom connection position; multiple grooves are formed on the cold surface, and the multiple grooves are aligned with the multiple protrusions. The refrigerant enters the top connection position through the inlet pipe and flows toward the middle channel and the side guide channel. As the refrigerant flows toward the bottom connection position, it flows in the inclined channel and fills the groove. The refrigerant in the bottom connection position collects and enters the outlet pipe, flowing toward the refrigeration equipment.

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