Condenser heat exchange device for improving heat exchange efficiency

Abstract

This utility model discloses a condenser heat exchange device for improving heat exchange efficiency, including a condenser body and heat exchange auxiliary mechanisms. The heat exchange auxiliary mechanisms are respectively installed on the outer side of the tube sheet of the inlet-side water chamber of the condenser body. The heat exchange auxiliary mechanisms also include a mounting plate and a flow-turbulence mechanism, with the flow-turbulence mechanism located on the front side of the mounting plate. The function of this utility model is to prevent cooling water from directly impacting the tube sheet, slowing down the adhesion of fouling to the tube sheet during condenser operation, reducing fouling corrosion of the tube sheet, and ensuring the heat exchange efficiency of the condenser; slowing down the accumulation rate of fouling on the inner wall of the heat exchange tubes, while ensuring the normal operation of online cleaning with rubber balls; simplifying the shutdown cleaning operation process, shortening the time for disassembling and installing the flow-turbulence mechanism, allowing for faster startup after cleaning, and reducing maintenance costs caused by shutdown cleaning.

Description

Technical Field

[0001] This utility model belongs to the field of condenser technology, and in particular relates to a condenser heat exchange device for improving heat exchange efficiency. Background Technology

[0002] The condenser is a key component of a steam turbine system. Through heat exchange, it converts the steam discharged from the turbine after it has performed work into condensate. Inside the turbine, the steam expands, significantly reducing its volume and creating a high vacuum during condensation. The condensate is then pumped to the boiler via a condensate pump, feedwater heater, and other equipment, ensuring the continuous and efficient operation of the entire thermodynamic cycle.

[0003] The condenser is equipped with numerous copper tubes through which circulating cooling water flows. When the turbine exhaust steam comes into contact with the outer wall of the copper tubes, the steam releases its latent heat of vaporization and condenses into water due to the cooling effect of the water flow within the tubes. During this process, the latent heat is continuously transferred to the circulating cooling water through the tube walls and carried away by the water. In this way, the exhaust steam is continuously condensed within the condenser. Simultaneously, as the exhaust steam cools, its specific volume decreases dramatically, creating a high vacuum inside the condenser below the turbine exhaust port.

[0004] Prolonged operation of the condenser leads to scaling, wear, and corrosion on the copper tube walls. This increases the thermal resistance between the fluid and the heat exchange wall, reduces the convective heat transfer coefficient inside the tubes, deteriorates heat transfer, and increases the terminal temperature difference. Although the copper tubes inside the condenser have been replaced and leaks plugged multiple times during shutdown maintenance, this has already resulted in a decrease in vacuum, increased steam consumption, and reduced unit economy and safety.

[0005] In the prior art, such as the Chinese patent (CN217636956U) which discloses a device that can continuously maintain the cleanliness of condenser heat exchange tubes, a shaftless spiral ribbon is included. One end of the shaftless spiral ribbon is connected to a hollow shaft, and one end of the hollow shaft is connected to a support sleeve. A support seat is fitted along the arc surface of the support sleeve. One end of the support seat extends to one side of the support sleeve, and an end cap is fitted at one end of the support seat. The end cap is in contact with the side of the support sleeve.

[0006] This method has the following drawbacks: First, while the disturbed water flow can slow down corrosion of the inner wall of the heat exchange tubes after installation, it still requires cleaning after prolonged use. Because the device has a flow-disrupting structure inside the heat exchange tubes, it's impossible to use a rubber ball for online cleaning. To maintain heat exchange efficiency while disrupting the flow, the condenser door must be disassembled for cleaning after a period of use. During this cleaning process, the condenser is unusable, affecting the normal operation of the entire production line. Second, during condenser use, scale in the hot water not only adheres to the inner wall of the heat exchange tubes, but also... (The sentence is incomplete and requires more context to translate accurately.) The water pressure also impacts the tube sheet, causing scale buildup. This scale corrodes the tube sheet, necessitating cleaning the tube sheet during condenser cleaning with a high-pressure water gun. Existing systems cannot prevent scale buildup on the tube sheet, leading to erosion and cracking, especially at the weld joints between the tube sheet and heat exchange tubes, thus reducing condenser heat exchange efficiency. Furthermore, during high-pressure water gun cleaning of the condenser, the flow-disturbing mechanisms inside the tubes can interfere with the high-pressure water flow, potentially damaging these mechanisms. Therefore, the devices inside the heat exchange tubes must be disassembled, cleaned, and then reinstalled, resulting in a complex and time-consuming cleaning process, increased downtime, and higher maintenance costs.

[0007] Therefore, this utility model provides a condenser heat exchange device to improve heat exchange efficiency. Utility Model Content

[0008] To address the aforementioned technical problems, this utility model discloses a condenser heat exchange device that improves heat exchange efficiency. It prevents cooling water from directly impacting the tube sheet, slows down the accumulation of fouling on the tube sheet during condenser operation, reduces fouling corrosion, and ensures the condenser's heat exchange efficiency. It also slows down the accumulation rate of fouling on the inner wall of the heat exchange tubes, while ensuring the normal operation of online cleaning with rubber balls. Furthermore, it simplifies the shutdown cleaning process, shortens the time required to disassemble and install the turbulence-inducing mechanism, and allows for faster startup after cleaning, reducing maintenance costs associated with shutdown cleaning.

[0009] To achieve the above-mentioned technical effects, this utility model provides a condenser heat exchange device for improving heat exchange efficiency, including a condenser body and a heat exchange auxiliary mechanism. The heat exchange auxiliary mechanism is respectively arranged on the outside of the tube sheet of the inlet side water chamber of the condenser body. The heat exchange auxiliary mechanism also includes a mounting plate and a turbulence mechanism. The turbulence mechanism for maintaining the turbulence of the heat exchange tube water flow is arranged on the front side of the mounting plate that isolates the cooling water from the tube sheet.

[0010] Preferably, the heat exchange tubes in the condenser body are provided with pipes with a wall thickness of 0.6mm made of corrosion-resistant material.

[0011] Preferably, the mounting plate further includes a sealing strip, a handle, and a mating interface. The sealing strip is located on the outer side of the mounting plate, the handle is located on the front side of the mounting plate, and the mating interface is located on the rear side of the mounting plate. The position and number of the mating interfaces correspond to the position and number of the heat exchange tubes on the tube sheet, respectively.

[0012] Preferably, the turbulence-disrupting mechanism further includes a mounting cylinder, a rotating wheel, turbulence-disrupting blades, and a top cover. The mounting cylinder is located on the front side of the mating interface on the mounting plate, the rotating wheel is slidably sleeved on the inner side of the mounting cylinder, the turbulence-disrupting blades are located on the inner side of the rotating wheel, and the top cover is located on the front side of the mounting cylinder.

[0013] Preferably, the inner diameter of the top cover is the same as the inner diameter of the heat exchange tube.

[0014] Preferably, the top cover is provided with a through hole, which is located on the front side of the deflector blade.

[0015] Preferably, the inner diameter of the turbulence-disrupting blades is the same as the inner diameter of the heat exchange tube.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] The device is equipped with a mounting plate and a flow-dispersing mechanism. The mounting plate, positioned between the cooling water and the tube sheet, acts as a barrier, preventing the cooling water from directly impacting the tube sheet. During condenser operation, it slows down the adhesion of fouling to the tube sheet, reducing fouling corrosion and ensuring the condenser's heat exchange efficiency. The flow-dispersing mechanism prevents the steady flow of water from entering the heat exchange tubes, thus slowing down the accumulation of fouling on the inner wall of the heat exchange tubes. This structure also allows the use of rubber balls for cleaning without obstructing their entry into the heat exchange tubes, ensuring online cleaning without requiring shutdown and disassembly. This ensures the production line can continue operating normally while the condenser is being cleaned. The mounting plate can be quickly removed from the water chamber wall using a handle, simplifying the shutdown cleaning process, shortening the time required to disassemble and install the flow-dispersing mechanism, and allowing for faster restart after cleaning, thus reducing maintenance costs associated with downtime cleaning. Attached Figure Description

[0018] Figure 1 This is an isometric view of the present invention;

[0019] Figure 2 This is a front view of the present invention;

[0020] Figure 3 yes Figure 2 A sectional view of section a.

[0021] Figure 4 yes Figure 3 A partial schematic diagram of b in the middle;

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Mounting plate; 2. Aeration mechanism; 3. Sealing strip; 4. Handle; 5. Connecting interface; 6. Mounting cylinder; 7. Rotating wheel; 8. Aeration blades; 9. Top cover; 10. Through hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] The prior art in this embodiment has the following problems: The inventors have found the following defects in the prior art: First, in this method, after the device is installed inside the heat exchange tube, the disturbed water flow can slow down the corrosion rate of the inner wall structure of the heat exchange tube. However, after long-term use, it is still necessary to clean the inner wall of the heat exchange tube. Because the device has a structure that disturbs the water flow inside the heat exchange tube, it is impossible to use a rubber ball to clean the heat exchange tube online when using the device. In order to ensure the heat exchange efficiency by disturbing the water flow through the structure, the condenser door can only be disassembled for shutdown cleaning after a period of use. During the shutdown cleaning process, the condenser cannot be used, which affects the normal operation of the entire production line; Second, during the use of the condenser, the dirt in the hot water not only adheres to the inner wall of the heat exchange tube, but also when the hot water enters When the hot water reaches the heat exchange tubes, it impacts the tube sheet, causing scale to adhere to it. This scale corrodes the tube sheet, and the tube sheet also needs to be cleaned when using a high-pressure water gun to clean the condenser. Existing devices cannot prevent scale buildup on the tube sheet, which causes corrosion and cracks on the surface of the tube sheet, especially at the weld joint between the tube sheet and the heat exchange tubes, reducing the heat exchange efficiency of the condenser. Thirdly, when cleaning the condenser with a high-pressure water gun, the mechanism that disturbs the water flow inside the tubes can easily interfere with the high-pressure water flow, and the high-pressure water flow may also damage the mechanism. Therefore, the device inside the heat exchange tubes needs to be removed and reinstalled after cleaning, making the shutdown cleaning process complicated and time-consuming, increasing downtime and maintenance costs.

[0026] Therefore, as Figures 1 to 4As shown, the inventor provides a condenser heat exchange device to improve heat exchange efficiency, including a condenser body and a heat exchange auxiliary mechanism. The heat exchange auxiliary mechanism is respectively arranged on the outside of the tube sheet (not shown) of the inlet side water chamber of the condenser body (not shown in the figure). The heat exchange auxiliary mechanism also includes a mounting plate 1 and a turbulence mechanism 2. The turbulence mechanism 2, which keeps the water flow of the heat exchange tube disturbed, is arranged on the front side of the mounting plate 1, which isolates the cooling water from the tube sheet.

[0027] Using the above scheme, before the condenser is used, the heat exchange auxiliary mechanism is installed on the tube sheet. The heat exchange auxiliary mechanism is installed on the inner wall of the condenser cavity outside the tube sheet through the mounting plate 1. The turbulence mechanism 2 is aligned with the inlet of the heat exchange tube (not shown in the figure) on the outside of the inlet water chamber. When the condenser is working, the cooling water enters the heat exchange tube after being disturbed by the turbulence mechanism 2 from the inlet water chamber (not shown in the figure) for heat exchange. When using a rubber ball to clean the condenser heat exchange tube online, the rubber ball introduced into the water chamber can enter the heat exchange tube from the turbulence mechanism 2 for cleaning. When the condenser is shut down for high-pressure water flushing, the entire mechanism can be removed through the mounting plate 1 to quickly clean the tube sheet and heat exchange tube.

[0028] Furthermore, the heat exchange tubes in the condenser body are equipped with pipes with a 0.6mm diameter wall made of corrosion-resistant material.

[0029] Among these improvements, the heat exchange tubes in the condenser body were replaced with pipes with a wall thickness of 0.6mm, which improved the overall heat exchange performance. Under the same heat exchange area, the overall heat transfer coefficient was increased by 5.16% compared with the original 1mm pipe. At the same time, in actual use, copper pipes can be replaced with stainless steel pipes with better corrosion resistance, which increases heat exchange efficiency and corrosion resistance, while also improving the cooling water heat exchange tubes' resistance to high-speed steam and water droplets on the steam side during operation.

[0030] Furthermore, the mounting plate 1 also includes a sealing strip 3, a handle 4, and a mating interface 5. The sealing strip 3 is located on the outer side of the mounting plate 1, the handle 4 is located on the front side of the mounting plate 1, and the mating interface 5 is located on the rear side of the mounting plate 1. The position and number of the mating interfaces 5 correspond to the position and number of the heat exchange tubes on the tube sheet, respectively.

[0031] When installing the heat exchange auxiliary mechanism, after cleaning the inside of the water chamber, the mounting plate 1 is installed on the outside of the tube sheet through the interface 5 by aligning the handle 4 with the heat exchange tube opening. The sealing strip 3 keeps the mounting plate 1 in close contact with the inner wall of the water chamber. The mounting plate can be set with different structures according to the shape of the inside of the heat exchanger water chamber. The mounting plate 1 acts as a barrier between the cooling water and the tube sheet, preventing the cooling water from directly impacting the tube sheet. During the use of the condenser, it slows down the adhesion of dirt to the tube sheet, reduces the corrosion of the tube sheet by dirt, and ensures the heat exchange efficiency of the condenser.

[0032] When the machine is shut down for high-pressure water flushing, the mounting plate 1 can be quickly removed from the water chamber wall by using handle 4, which simplifies the shutdown cleaning process, shortens the time for disassembling and installing the turbulence mechanism 2, and allows for faster startup after cleaning, thus reducing maintenance costs caused by shutdown cleaning.

[0033] Furthermore, the turbulence mechanism 2 also includes a mounting cylinder 6, a rotating wheel 7, turbulence blades 8, and a top cover 9. The mounting cylinder 6 is located on the front side of the interface 5 on the mounting plate 1, the rotating wheel 7 is slidably sleeved on the inner side of the mounting cylinder 6, the turbulence blades 8 are located on the inner side of the rotating wheel 7, and the top cover 9 is located on the front side of the mounting cylinder 6.

[0034] During normal operation of the condenser, cooling water from the inlet side of the water chamber enters the mounting cylinder 6 through the top cover 9. The water flow drives the turbulence-inducing blades 8 on the rotating wheel 7 to rotate inside the mounting cylinder 6, stirring the water flow from the mounting cylinder 6 into the heat exchange tubes and maintaining a turbulent state. This prevents the steady water flow from entering the heat exchange tubes and causing dirt to adhere to the inner wall of the heat exchange tubes, thus slowing down the accumulation of dirt on the inner wall of the heat exchange tubes. At the same time, this structure does not obstruct the entry of the rubber ball into the heat exchange tubes when using rubber ball cleaning, ensuring the normal operation of online cleaning with rubber balls without stopping the machine to disassemble and clean the mechanism, thus ensuring the normal operation of the production line when the condenser is being cleaned.

[0035] Furthermore, the inner diameter of the top cover 9 is the same as the inner diameter of the heat exchange tube;

[0036] The inner diameter of the top cover 9 is the same as that of the heat exchange tube. When using a cleaning ball, a cleaning ball that is 1-2 mm smaller than the diameter of the heat exchange tube is generally used. This design of the top cover 9 ensures that the cleaning ball can smoothly enter the heat exchange tube during cleaning.

[0037] Furthermore, the top cover 9 is provided with a through hole 10, which is located on the front side of the deflector blade 8;

[0038] In this process, the water flow from the inlet side of the water chamber enters the turbulence blades 8 through the through hole 10. The turbulence blades 8 are driven to rotate by the water flow, so that the water flow forms a rotating water flow on the turbulence blades 8 and enters the interior of the heat exchange tube. This ensures the stirring effect of the turbulence blades 8 on the water flow. At the same time, the water flow generated can actively adsorb the rubber balls to the vicinity of the inlet of the top cover 9 during the cleaning of the rubber balls, thereby improving the cleaning efficiency.

[0039] Furthermore, the inner diameter of the turbulence-disrupting blade 8 is the same as the inner diameter of the heat exchange tube;

[0040] The turbulence blade 8 is powered by the water flow entering through the through hole 10 on the top cover 9, which in turn drives the water flow entering the heat exchange tube to rotate. The rotation of the turbulence blade 8 makes the inner diameter of the circle formed the same as the inner diameter of the heat exchange tube, so that the rubber balls can enter the heat exchange tube normally during cleaning.

[0041] In summary, this device is equipped with a mounting plate 1 and a flow-dispersing mechanism 2. The mounting plate 1, positioned between the cooling water and the tube sheet, acts as a barrier, preventing the cooling water from directly impacting the tube sheet. During condenser operation, it slows down the adhesion of fouling to the tube sheet, reducing fouling corrosion and ensuring the condenser's heat exchange efficiency. The flow-dispersing mechanism 2 prevents the steady flow of water from entering the heat exchange tubes and causing fouling to adhere to the inner wall of the heat exchange tubes, slowing down the accumulation rate of fouling. This structure also does not obstruct the entry of the rubber ball into the heat exchange tubes during cleaning, ensuring normal online cleaning without requiring shutdown and disassembly of the mechanism. This ensures the production line can operate normally while the condenser is being cleaned. The mounting plate 1 can be quickly removed from the water chamber wall using handle 4, simplifying the shutdown cleaning process, shortening the time required to disassemble and install the flow-dispersing mechanism 2, and allowing for faster restart after cleaning, thus reducing maintenance costs associated with shutdown cleaning.

[0042] The working principle of this utility model:

[0043] Before using the condenser, clean the inside of the water chamber, align the handle 4 with the heat exchange tube inlet, and install the mounting plate 1 on the outside of the tube sheet through the interface 5. The sealing strip 3 keeps the mounting plate 1 in close contact with the inner wall of the water chamber. The mounting plate can be set with different structures according to the shape of the inside of the heat exchanger water chamber. The mounting plate 1 acts as a barrier between the cooling water and the tube sheet, preventing the cooling water from directly impacting the tube sheet. During the use of the condenser, it slows down the adhesion of dirt to the tube sheet, reduces the corrosion of the tube sheet by dirt, and ensures the heat exchange efficiency of the condenser.

[0044] During normal condenser operation, cooling water from the water chamber inlet side enters the mounting cylinder 6 through the top cover 9. The water flow drives the turbulence-inducing blades 8 on the rotating wheel 7 to rotate inside the mounting cylinder 6, maintaining turbulence in the water flow entering the heat exchange tubes from the mounting cylinder 6. Water from the water chamber inlet side enters the turbulence-inducing blades 8 through the through hole 10. The water flow propels the turbulence-inducing blades 8 to rotate, creating a rotating water flow that enters the heat exchange tubes. This ensures the turbulence-inducing effect of the turbulence-inducing blades 8, preventing the accumulation of dirt on the inner wall of the heat exchange tubes and slowing down the buildup of dirt. Simultaneously, this structure does not obstruct the entry of rubber balls into the heat exchange tubes during cleaning, ensuring normal online cleaning without requiring shutdown and disassembly for cleaning. This guarantees the normal operation of the production line during condenser cleaning. Furthermore, the generated water flow can actively attract the rubber balls to the vicinity of the top cover 9 inlet during cleaning, improving cleaning efficiency.

[0045] When the machine is shut down for high-pressure water flushing, the mounting plate 1 can be quickly removed from the water chamber wall by using handle 4, which simplifies the shutdown cleaning operation process, shortens the time for disassembling and installing the turbulence mechanism 2, and allows for faster startup after cleaning, thus reducing maintenance costs caused by shutdown cleaning.

[0046] In addition, replacing the heat exchange tubes in the condenser body with pipes with a wall thickness of 0.6mm improves the overall heat exchange performance. Under the same heat exchange area, the overall heat transfer coefficient is 5.16% higher than that of the original 1mm pipe. At the same time, in actual use, copper pipes can be replaced with stainless steel pipes with better corrosion resistance, which increases heat exchange efficiency and corrosion resistance, while also improving the cooling water heat exchange tubes' resistance to high-speed steam and water droplets on the steam side during operation.

[0047] This concludes the description of the working principle of the device.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A condenser heat exchange device for improving heat exchange efficiency, comprising a condenser body and heat exchange auxiliary mechanisms, wherein the heat exchange auxiliary mechanisms are respectively disposed on the outer side of the tube sheet of the inlet-side water chamber of the condenser body, characterized in that: The heat exchange auxiliary mechanism also includes a mounting plate (1) and a turbulence mechanism (2). The turbulence mechanism (2), which keeps the water flow in the heat exchange tube turbulent, is located on the front side of the mounting plate (1) that isolates the cooling water from the tube sheet.

2. The condenser heat exchange device for improving heat exchange efficiency according to claim 1, characterized in that: The heat exchange tubes in the condenser body are equipped with pipes with a wall thickness of 0.6mm made of corrosion-resistant material.

3. A condenser heat exchange device for improving heat exchange efficiency according to claim 1, characterized in that: The mounting plate (1) also includes a sealing strip (3), a handle (4), and a mating interface (5). The sealing strip (3) is located on the outside of the mounting plate (1), the handle (4) is located on the front side of the mounting plate (1), and the mating interface (5) is located on the rear side of the mounting plate (1). The position and number of the mating interfaces (5) correspond to the position and number of the heat exchange tubes on the tube sheet.

4. A condenser heat exchange device for improving heat exchange efficiency according to claim 1, characterized in that: The aforementioned turbulence mechanism (2) further includes a mounting cylinder (6), a rotating wheel (7), turbulence blades (8), and a top cover (9). The mounting cylinder (6) is located on the front side of the interface (5) on the mounting plate (1). The rotating wheel (7) is slidably sleeved on the inner side of the mounting cylinder (6). The turbulence blades (8) are located on the inner side of the rotating wheel (7). The top cover (9) is located on the front side of the mounting cylinder (6).

5. A condenser heat exchange device for improving heat exchange efficiency according to claim 4, characterized in that: The inner diameter of the top cover (9) is the same as the inner diameter of the heat exchange tube.

6. A condenser heat exchange device for improving heat exchange efficiency according to claim 4, characterized in that: The top cover (9) is provided with a through hole (10), which is located on the front side of the turbulence blade (8).

7. A condenser heat exchange device for improving heat exchange efficiency according to claim 4, characterized in that: The inner diameter of the turbulence blade (8) is the same as the inner diameter of the heat exchange tube.

Images