A spiral plate heat exchanger

Abstract

This utility model discloses a spiral plate heat exchanger, relating to the field of spiral plate heat exchange technology. It includes a heat exchanger body comprising an upper cylinder and a lower cylinder. Both the upper and lower cylinders are equipped with spiral heat-conducting plates capable of exchanging heat between hot and cold fluids. The outer wall of the upper cylinder is provided with an inlet pipe for supplying brine to the spiral heat-conducting plates. This utility model utilizes the upper cylinder primarily for condensation, where a large amount of steam condenses, resulting in a large heat transfer area. The lower cylinder is used for subcooling the condensate or handling the load steam, thereby improving system energy efficiency. The upper and lower cylinders are connected in series, sharing a steam chamber and a condensate system. This two-stage design integrates condensation and subcooling, reducing equipment volume. Simultaneously, the use of baffle components achieves dynamic equilibrium distribution of hot and cold fluids, solving the problem of uneven brine flow and improving heat exchange efficiency and service life.

Description

Technical Field

[0001] This utility model relates to the field of spiral plate heat exchange technology, specifically a spiral plate heat exchanger. Background Technology

[0002] Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used. Spiral plate heat exchangers are heat exchangers made of a parallel metal plate rolled into a straight channel, and the hot and cold fluids exchange heat through the spiral plate wall.

[0003] However, the hot and cold fluids flow along the spiral and straight channels made of the metal plate respectively to achieve the heat transfer effect. Due to the inherent design of the spiral plate structure, the flow distribution of the hot and cold fluids between the spiral and straight channels is uneven, which can easily generate local temperature gradients, affecting the heat exchange uniformity and equipment lifespan, thus limiting the promotion of spiral plate heat exchangers in high-efficiency and energy-saving industrial applications. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems of the prior art. To this end, this invention proposes a spiral plate heat exchanger that can reduce equipment size, achieve dynamic equilibrium distribution of hot and cold fluids, and improve heat exchange efficiency and service life.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a spiral plate heat exchanger, comprising a heat exchanger body, the heat exchanger body comprising an upper cylinder and a lower cylinder, both the upper cylinder and the lower cylinder being provided with spiral heat-conducting plates capable of exchanging heat between hot and cold fluids, the outer wall of the upper cylinder being provided with an inlet pipe capable of conveying brine into the spiral heat-conducting plates, the outer wall of the upper cylinder being fitted with an outlet pipe capable of discharging the brine after heat exchange into the spiral heat-conducting plates, and a baffle assembly being fitted at the axial position of the spiral heat-conducting plates;

[0006] The baffle assembly includes a conveying pipe positioned along the axis of the spiral heat-conducting plate. Multiple sets of baffles are fixed at equal intervals along the length of the conveying pipe. A turbulence-inducing plate is fixed between two adjacent sets of baffles. A vent hole is provided on the end face of each set of baffles at an eccentric position. The vent holes of two adjacent sets of conveying pipes are staggered. Multiple sets of branch pipes connected to the conveying pipe are provided inside each set of baffles. A ring pipe is connected to the end of the multiple sets of branch pipes. A discharge pipe extending beyond the curved surface of the baffle is provided on the outer wall of the ring pipe.

[0007] According to some embodiments of the present invention, the lower cylinder is connected to the bottom of the upper cylinder by means of a flange, and the bottom end of the lower cylinder is provided with a cleaning port that can discharge waste material from the upper cylinder and the lower cylinder.

[0008] According to some embodiments of this utility model, the outer wall of the upper cylinder and the opposite side of the water inlet pipe are connected to a steam inlet, and the outer wall of the lower cylinder and the area below the spiral heat-conducting plate are connected to a steam outlet.

[0009] According to some embodiments of the present invention, the end of the water inlet pipe is provided with a horn cover connected to the end face of the baffle and communicating with the delivery pipe, and the end of the discharge pipe can deliver brine into the spiral channel formed by the spiral heat-conducting plate.

[0010] According to some embodiments of the present invention, the top end of the upper cylinder is connected to an end cover by a flange, and the top end of the end cover is connected to an L-arm rotatably disposed on the outer wall of the steam inlet.

[0011] According to some embodiments of the present invention, the outer walls of the upper cylinder and the lower cylinder are provided with ear plates that can be lifted, and the ear plates are integrally cast with the upper cylinder and the lower cylinder.

[0012] According to some embodiments of the present invention, a drain pipe is provided on the outer wall of the spiral heat-conducting plate near the bottom, and the end of the drain pipe extends to the outer body of the upper cylinder and can discharge the dirt inside the spiral heat-conducting plate.

[0013] In summary, the present invention has the following main advantages:

[0014] This invention utilizes the upper cylinder to primarily handle condensation, where a large amount of steam condenses, resulting in a large heat transfer area. The lower cylinder is used for subcooling the condensate or processing the load steam, thereby improving system energy efficiency. The upper and lower cylinders are connected in series and share a steam chamber and condensate system. This two-stage design integrates condensation and subcooling, reducing equipment size. At the same time, the baffle assembly achieves dynamic balance distribution of hot and cold fluids, solving the problem of uneven brine flow and improving heat exchange efficiency and service life. Attached Figure Description

[0015] Figure 1 This is a front plan view of the heat exchanger body of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the spiral heat-conducting plate of this utility model;

[0017] Figure 3 This is a structural diagram of the end face of the spiral heat-conducting plate of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the baffle component of this utility model;

[0019] Figure 5 This is a schematic diagram of the baffle and spoiler structure of this utility model;

[0020] Figure 6 This is a cross-sectional view of the end face of the baffle of this utility model.

[0021] In the diagram: 100, Heat exchanger body; 110, Upper cylinder; 120, Lower cylinder; 130, End cap; 140, Steam inlet; 141, Steam outlet; 142, Cleaning port; 150, Spiral heat guide plate; 160, Water inlet pipe; 161, Horn cover; 170, Water outlet pipe; 171, Collection frame; 180, Drain pipe;

[0022] 200, Baffle assembly; 210, Baffle plate; 220, Delivery pipe; 230, Vent hole; 240, Baffle plate; 250, Discharge pipe; 260, Branch pipe; 270, Ring pipe. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The embodiments of this utility model will be described below based on its overall structure.

[0025] A spiral plate heat exchanger, such as Figures 1 to 6 As shown, the device includes a heat exchanger body 100, which includes an upper cylinder 110 and a lower cylinder 120. The lower cylinder 120 is connected to the bottom of the upper cylinder 110 by a flange. Both the upper cylinder 110 and the lower cylinder 120 are provided with spiral heat-conducting plates 150 that can exchange heat between hot and cold fluids. The outer wall of the upper cylinder 110 is provided with an inlet pipe 160 that can deliver brine into the spiral heat-conducting plates 150. The outer wall of the upper cylinder 110 is fitted with an outlet pipe 170 that can discharge the brine after heat exchange into the spiral heat-conducting plates 150. A baffle assembly 200 is installed at the axial position of the spiral heat-conducting plates 150.

[0026] The baffle assembly 200 includes a conveying pipe 220 located at the axial position of the spiral heat-conducting plate 150. Multiple sets of baffles 210 are fixed at equal intervals along the length of the conveying pipe 220. A baffle plate 240 is fixed between two adjacent sets of baffles 210. A vent hole 230 is opened on the end face of each set of baffles 210 at an eccentric position. The vent holes 230 opened on two adjacent sets of conveying pipes 220 are in a staggered state. Multiple sets of branch pipes 260 connected to the conveying pipe 220 are provided in each set of baffles 210. A ring pipe 270 is connected to the end of the multiple sets of branch pipes 260. A discharge pipe 250 extending to the outside of the curved surface of the baffle 210 is provided on the outer wall of the ring pipe 270.

[0027] The outer wall of the upper cylinder 110, opposite to the water inlet pipe 160, is connected to a steam inlet 140, and the outer wall of the lower cylinder 120, below the spiral heat-conducting plate 150, is connected to a steam outlet 141.

[0028] The end of the water inlet pipe 160 is provided with a horn cover 161 connected to the end face of the baffle plate 210 and connected to the delivery pipe 220. The end of the outlet pipe 250 can deliver brine into the spiral channel formed by the spiral heat-conducting plate 150.

[0029] A drain pipe 180 is provided on the outer wall of the spiral heat-conducting plate 150 near the bottom. The end of the drain pipe 180 extends to the outside of the upper cylinder 110 and can discharge the dirt inside the spiral heat-conducting plate 150.

[0030] It is worth noting that the spiral heat-conducting plate 150 installed inside the lower cylinder 120 is the same as that inside the upper cylinder 110, as is the internal baffle assembly 200; the upper cylinder 110 mainly undertakes the condensation, where a large amount of steam condenses, and the heat transfer area accounts for a large proportion; the lower cylinder 120 is used for condensate subcooling or handling load steam, thereby improving system energy efficiency. The upper cylinder 110 and the lower cylinder 120 are connected in series and share a steam chamber and condensate system;

[0031] The outer wall of the upper cylinder 110 is provided with a collection frame 171 that is connected to the spiral channel formed by the spiral heat-conducting plate 150. The water outlet pipe 170 is connected to the collection frame 171 and can discharge the brine after heat exchange.

[0032] The freezing point of the brine can be changed by adjusting its concentration to meet different refrigeration needs, thereby improving the condensation effect.

[0033] Its steam inlet 140, steam outlet 141, water outlet pipe 170 and water inlet pipe 160 are connected by flanges;

[0034] Steam enters the upper cylinder 110 from the steam inlet 140, flows to the spiral heat conduction plate 150 and passes through the channel formed in the middle. The steam condenses rapidly on the surface of the spiral heat conduction plate 150 and releases latent heat to the brine. The condensate then flows into the lower cylinder 120 for subcooling treatment by gravity or system pressure, and is finally discharged from the steam outlet 141 after heat exchange.

[0035] Meanwhile, brine enters the delivery pipe 220 through the inlet pipe 160 and the horn cover 161, and is diverted to the ring pipe 270 through the branch pipe 260 in the baffle 210. It is then evenly sprayed from the outlet pipe 250 into the spiral channel formed by the spiral heat-conducting plates 150. The baffle 210 and the vent holes 230 cause the steam to flow in a zigzag pattern within the channel (as per the instruction manual). Figure 2As shown in the figure, the arrows drawn in the figure represent the flow trajectory of steam in the channel. The baffle 240 generates turbulence during the fluid flow. The staggered design of the vent 230 promotes the full mixing of gas and liquid (heat exchange is achieved through the contact of the baffle 210). Salt water can be delivered from each set of discharge pipes 250 into the spiral channel, thereby effectively eliminating local temperature gradients and ensuring uniform and efficient heat exchange.

[0036] The drain pipe 180 regularly discharges the dirt accumulated inside the spiral heat-conducting plate 150, and the cleaning port 142 facilitates the cleaning of waste inside the upper cylinder 110 and the lower cylinder 120, making maintenance convenient.

[0037] Please refer to this carefully. Figure 1 The bottom end of the lower cylinder 120 is provided with a cleaning port 142 that can discharge waste from the upper cylinder 110 and the lower cylinder 120.

[0038] Opening the cleaning port 142 allows for the removal of liquids and other contaminants remaining in the lower cylinder 120.

[0039] Please refer to this carefully. Figure 1 The top of the upper cylinder 110 is connected to an end cover 130 by a flange, and the top of the end cover 130 is connected to an L-arm that is rotatably mounted on the outer wall of the steam inlet 140.

[0040] The bolts securing the end cover 130 can be loosened with the help of tools, and external force can be applied to make it rotate around the axis of the L-arm, so that the end cover 130 is misaligned with the upper cylinder 110 to facilitate internal maintenance. At the same time, the L-arm provides auxiliary restraint for the end cover 130, which can be easily disassembled and assembled manually.

[0041] Please refer to this carefully. Figure 1 The outer walls of the upper cylinder 110 and the lower cylinder 120 are provided with ear plates that can be lifted, and the ear plates are integrally cast with the upper cylinder 110 and the lower cylinder 120.

[0042] The ear plates can be connected to hooks of external lifting equipment, making the transport of the heat exchanger body 100 convenient and efficient, and providing convenience for manual disassembly and assembly.

[0043] In use, steam enters the upper cylinder 110 from the steam inlet 140, flows to the spiral heat conduction plate 150 and flows through the channel formed in the middle. The steam condenses rapidly on the surface of the spiral heat conduction plate 150 and releases latent heat to the brine. The condensate then flows into the lower cylinder 120 for subcooling treatment by gravity or system pressure, and is finally discharged from the steam outlet 141 after heat exchange.

[0044] Meanwhile, brine enters the delivery pipe 220 through the inlet pipe 160 and the horn cover 161, and is diverted to the ring pipe 270 through the branch pipe 260 in the baffle 210. It is then evenly sprayed from the outlet pipe 250 into the spiral channel formed by the spiral heat-conducting plates 150. The baffle 210 and the vent holes 230 cause the steam to flow in a zigzag pattern within the channel (as per the instruction manual). Figure 2 As shown in the figure, the arrows drawn in the figure represent the flow trajectory of steam in the channel. The baffle 240 generates turbulence during the fluid flow. The staggered design of the vent 230 promotes the full mixing of gas and liquid (heat exchange is achieved through the contact of the baffle 210). Salt water can be delivered from each set of discharge pipes 250 into the spiral channel, thereby effectively eliminating local temperature gradients and ensuring uniform and efficient heat exchange. The parts not involved in this device are the same as or can be implemented using existing technologies.

[0045] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A spiral plate heat exchanger comprising a heat exchanger body (100), characterized in that: The heat exchanger body (100) includes an upper cylinder (110) and a lower cylinder (120). Both the upper cylinder (110) and the lower cylinder (120) are provided with spiral heat-conducting plates (150) capable of exchanging heat between hot and cold fluids. The outer wall of the upper cylinder (110) is provided with an inlet pipe (160) capable of conveying brine into the spiral heat-conducting plates (150). The outer wall of the upper cylinder (110) is equipped with an outlet pipe (170) capable of discharging the brine after heat exchange into the spiral heat-conducting plates (150). A baffle assembly (200) is installed at the axial position of the spiral heat-conducting plates (150). The baffle assembly (200) includes a conveying pipe (220) located on the axis of the spiral heat-conducting plate (150). Multiple sets of baffles (210) are fixed at equal intervals along the length of the conveying pipe (220). A baffle plate (240) is fixed between two adjacent sets of baffles (210). A vent hole (230) is provided on the end face of each set of baffles (210) at an eccentric position. The vent holes (230) of two adjacent sets of conveying pipes (220) are misaligned. Multiple sets of branch pipes (260) connected to the conveying pipe (220) are provided in each set of baffles (210). A ring pipe (270) is connected to the end of the multiple sets of branch pipes (260). The outer wall of the ring pipe (270) is provided with a discharge pipe (250) extending to the outside of the curved surface of the baffle (210).

2. A spiral plate heat exchanger according to claim 1, characterized in that The lower cylinder (120) is connected to the bottom of the upper cylinder (110) by a flange. The bottom end of the lower cylinder (120) is provided with a cleaning port (142) that can discharge waste from the upper cylinder (110) and the lower cylinder (120).

3. A spiral plate heat exchanger according to claim 1, characterized in that: The outer wall of the upper cylinder (110) and the opposite side of the water inlet pipe (160) are connected to a steam inlet (140), and the outer wall of the lower cylinder (120) is connected to a steam outlet (141) below the spiral heat-conducting plate (150).

4. A spiral plate heat exchanger according to claim 1, characterized in that: The end of the inlet pipe (160) is provided with a horn cover (161) connected to the end face of the baffle (210) and connected to the delivery pipe (220). The end of the outlet pipe (250) can deliver brine into the spiral channel formed by the spiral heat-conducting plate (150).

5. A spiral plate heat exchanger according to claim 1, characterized in that: The top of the upper cylinder (110) is connected to an end cap (130) by a flange, and the top of the end cap (130) is connected to an L-arm that is rotatably located on the outer wall of the steam inlet (140).

6. A spiral plate heat exchanger according to claim 1, characterized in that: The outer walls of the upper cylinder (110) and the lower cylinder (120) are provided with ear plates that can be lifted, and the ear plates are integrally cast with the upper cylinder (110) and the lower cylinder (120).

7. A spiral plate heat exchanger according to claim 1, characterized in that: The outer wall of the spiral heat-conducting plate (150) is provided with a drain pipe (180) near the bottom. The end of the drain pipe (180) extends to the outside of the upper cylinder (110) and can discharge the dirt inside the spiral heat-conducting plate (150).

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