An esterification steam condensate heat recycling device

Abstract

The present application relates to energy-saving heat exchange technical field, especially to a kind of esterification vapor condensate heat reutilization device.It includes support, the support is fixedly connected with tank, the tank is fixedly connected with liquid outlet tray in, the liquid outlet tray is fixedly connected and is communicated with the heat exchange pipe of uniform distribution, all the heat exchange pipe is fixedly connected and is communicated with liquid inlet tray, the heat exchange pipe is fixedly connected with overflow shell, the tank is provided with water storage tray, the water storage tray is provided with through hole above all the overflow shell.The present application is by condensate accumulation to the overflow shell in the top of heat exchange pipe, make overflow shell full after uniform overflow to the outside and along heat exchange pipe outer wall present uniform, continuous and thin layer of liquid film shape continuously downward flow, this thin liquid film flow mode greatly reduces the flow thickness of condensate, significantly reduces heat transfer thermal resistance, so that condensate heat can be more efficiently transferred to the cooling water in pipe, thereby improving the heat recovery rate of condensate.

Description

Technical Field

[0001] This invention relates to the field of energy-saving heat exchange technology, and in particular to a device for reusing the heat of esterified steam condensate. Background Technology

[0002] Esterification is a crucial step in the production of chemical products such as polyester and ethyl acetate. The water generated during the reaction is discharged as steam, which, after condensation, forms a high-temperature esterification steam condensate. This condensate is hot and rich in waste heat; direct discharge would result in significant energy waste. Therefore, waste heat recovery has become a key measure for energy conservation and emission reduction in the industry. A typical recovery system consists of a primary condenser and a secondary heat exchanger connected in series: the former condenses the steam and extracts its latent heat, while the latter extracts the sensible heat of the condensate for preheating raw materials or process media, achieving cascaded heat utilization. Most existing secondary heat exchangers use shell-and-tube heat exchangers and plate heat exchangers to recover the heat from the condensate. When these heat exchangers are running, the high-temperature condensate completely fills the heat exchange channels and propels the flow at a high flow rate. Under these conditions, the fluid is in a laminar or low-turbulent state, with faster heat exchange near the wall area, while the flow velocity is slow and the thermal resistance is high in the central area of ​​the pipes or channels, making it difficult for heat to be effectively transferred to the heat exchange surface through conduction. This limits energy-saving effects and results in a low waste heat recovery rate. Summary of the Invention

[0003] In order to overcome the shortcomings mentioned in the background art, the present invention provides an esterification steam condensate heat recovery device.

[0004] Technical Solution: A device for reusing heat from esterification steam condensate, comprising a support frame, a tank body fixedly connected to the support frame, an outlet plate fixedly connected to the tank body, a uniformly distributed heat exchange tube fixedly connected and communicating with the outlet plate, all heat exchange tubes being fixedly connected and communicating with an inlet plate, a gap existing between the inlet plate and the tank body, overflow shells fixedly connected to the heat exchange tubes, a water storage plate disposed within the tank body between the outlet plate and all the overflow shells, a through hole provided above each of the overflow shells in the water storage plate, an inlet pipe and an outlet pipe fixedly connected to the tank body, the inlet pipe communicating with the inlet plate, the outlet pipe communicating with the outlet plate, a condensate inlet pipe and a condensate outlet pipe fixedly connected and communicating with the tank body, the condensate inlet pipe being located between the outlet plate and the water storage plate.

[0005] To further explain, the tank body is rotatably connected to a threaded shaft, and the tank body is fixedly connected to a first driving component. The output shaft of the first driving component is fixedly connected to the threaded shaft, and the threaded shaft is threadedly connected to a scraper that is slidably connected to all the heat exchange tubes.

[0006] To further explain, a plurality of first flow guides are provided inside the heat exchange tube, and all the first flow guides in the same heat exchange tube are fixedly connected to a connecting rod, and the connecting rod is fixedly connected to a number of second flow guides equal to the number of the first flow guides.

[0007] To further explain, the first flow guide is annular and its central axis coincides with the central axis of the corresponding heat exchange tube, and the second flow guide is disc-shaped and its central axis coincides with the central axis of the corresponding heat exchange tube. The first flow guide and the second flow guide within the same heat exchange tube are staggered.

[0008] To further clarify, the water storage tray and the tank body are connected in a sealed sliding manner.

[0009] To further explain, a connecting pipe is fixedly connected to the through hole of the water storage pan. The bottom of the connecting pipe is located at the bottom of the overflow shell, which is used to allow the condensate on the water storage pan to enter the bottom of the overflow shell along the connecting pipe.

[0010] To further explain, the overflow shell and the corresponding heat exchange tube are jointly and slidably connected to a drain plate. The drain plate is fixedly connected to the corresponding connecting pipe. The connecting pipe guides the condensate to the upper side of the drain plate. The water storage pan is fixedly connected to symmetrically distributed sliding rods. The sliding rods are slidably connected to the liquid outlet pan through the tank body through the tank body. The tank body is fixedly connected to a second driving member with the same number of sliding rods. The telescopic end of the second driving member is fixedly connected to the corresponding sliding rod.

[0011] To further explain, the first flow guide and the corresponding heat exchange tube are slidably connected.

[0012] To further explain, the connecting rod is fixedly connected to a push rod, the push rod is slidably connected to the liquid outlet plate through a seal, all the push rods are fixedly connected to a connecting plate, the connecting plate is provided with a guide groove, and the threaded shaft is fixedly connected to a slider located in the guide groove.

[0013] To further explain, the guide groove is a closed, annular, wavy groove.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention accumulates condensate in the overflow shell at the top of the heat exchange tube, so that after the overflow shell is full, it overflows outward evenly and flows downward in a uniform, continuous and thin liquid film along the outer wall of the heat exchange tube. This thin liquid film flow mode greatly reduces the flow thickness of the condensate, significantly reduces the heat transfer resistance, and enables the heat of the condensate to be transferred to the cooling water in the tube more efficiently, thereby improving the heat recovery rate of the condensate.

[0015] 2. A communicating vessel structure is formed by connecting pipes and overflow shell, allowing condensate to be injected directly into the bottom of the overflow shell. This ensures that the liquid level in the overflow shell is stable and flows outward evenly, improving the uniformity of heat exchange between the condensate and the water in the heat exchange tubes. After heat exchange, the residual condensate in the overflow shell is actively pushed out by the drain plate, preventing the residual condensate from crystallizing and depositing in the overflow shell after cooling, which would affect the uniformity of condensate residue in the overflow shell.

[0016] 3. By sliding the slider along the wavy guide groove, the first and second guide components move synchronously, dynamically changing the flow state of the water in the heat exchange tube. This causes the water flow to be continuously dispersed and converged alternately, improving the uniformity of heat exchange between the water and condensate in the heat exchange tube. After the heat exchange is completed, the scraper removes the crystals attached to the outside of the heat exchange tube to ensure the heat exchange rate between the water and condensate in the heat exchange tube. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the tank body of the present invention; Figure 3 This is a three-dimensional structural diagram of the scraper of the present invention; Figure 4 This is a three-dimensional structural diagram of the connecting pipe and the drain plate of the present invention; Figure 5 This is a three-dimensional cross-sectional view of the heat exchange tube of the present invention; Figure 6 This is a three-dimensional structural diagram of the guide groove of the present invention.

[0018] In the attached diagrams: 1. Support, 2. Tank body, 3. Liquid outlet plate, 4. Heat exchange tube, 5. Liquid inlet plate, 6. Overflow shell, 7. Water storage plate, 8. Liquid inlet pipe, 9. Liquid outlet pipe, 10. Condensate inlet pipe, 11. Condensate outlet pipe, 201. Threaded shaft, 202. First driving component, 203. Scraper, 204. First guide component, 205. Connecting rod, 206. Second guide component, 301. Connecting pipe, 302. Drain plate, 303. Sliding rod, 304. Second driving component, 401. Push rod, 402. Connecting plate, 403. Guide groove, 404. Slider. Detailed Implementation

[0019] 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.

[0020] Existing secondary heat exchange equipment mostly uses shell-and-tube or plate heat exchangers. During operation, high-temperature condensate fills the flow channel and is propelled by a large flow rate. The flow pattern is mostly laminar or low turbulence, which results in faster heat exchange near the wall, while the flow velocity and thermal resistance are low in the central area of ​​the flow channel, making it difficult for heat to be effectively transferred to the heat exchange surface. This limits the energy-saving effect and results in low waste heat recovery efficiency.

[0021] Example 1 This embodiment provides an esterification steam condensate heat recovery device to improve the condensate heat recovery rate.

[0022] like Figures 1-5 As shown, the system includes a support 1, a tank 2 fixedly connected to the support 1, an outlet plate 3 fixedly connected to the top of the tank 2, and uniformly distributed heat exchange tubes 4 fixedly connected and connected to the lower side of the outlet plate 3. Each heat exchange tube 4 consists of a lower heat exchange section and an upper connecting section. The outer diameter of the connecting section of the heat exchange tube 4 is smaller than the outer diameter of the corresponding heat exchange section. All heat exchange tubes 4 are fixedly connected and connected to an inlet plate 5 at their bottoms. There is a gap between the inlet plate 5 and the tank 2. An overflow shell 6 is fixedly connected to the top of the heat exchange section of the heat exchange tube 4. The connecting section of the heat exchange tube 4 passes through the corresponding overflow shell 6. The outer diameter of the heat exchange section of the heat exchange tube 4 is the same as the outer diameter of the overflow shell 6, and the central axis of the heat exchange tube 4 coincides with the central axis of the corresponding overflow shell 6. A water storage plate 7 is provided inside the tank 2, located between the outlet plate 3 and all overflow shells 6. In this embodiment, the connection between the water storage plate 7 and the tank 2 is fixed, but this is limited to this embodiment. The water storage plate 7 is located between all overflow shells 6. All tanks are equipped with through holes at the top, allowing condensate on the upper side of the water storage pan 7 to fall into the corresponding overflow shell 6 and accumulate there. When the condensate level in the overflow shell 6 is flush with the top of the overflow shell 6, it overflows outwards. The condensate forms a thin film that adheres to the overflow shell 6 and the corresponding heat exchange tube 4 and flows downwards. The tank body 2 is fixedly connected to an inlet pipe 8 and an outlet pipe 9. The inlet pipe 8 is connected to the inlet pan 5, and the outlet pipe 9 is connected to the outlet pan 3. External water can enter the inlet pan through the inlet pipe 8. 5. Then, the water flows upward along all the heat exchange tubes 4 and finally enters the liquid outlet plate 3. The water in the liquid outlet plate 3 is discharged along the liquid outlet pipe 9. The tank body 2 is fixedly connected and connected to the condensate inlet pipe 10 and the condensate outlet pipe 11. The condensate inlet pipe 10 is located on the side wall of the tank body 2 and is located between the liquid outlet plate 3 and the water storage plate 7. The condensate outlet pipe 11 is located at the bottom of the tank body 2. The above-mentioned inlet pipe 8, outlet pipe 9, condensate inlet pipe 10 and condensate outlet pipe 11 are all equipped with solenoid valves for controlling opening and closing (not shown in the figure).

[0023] like Figures 1-4As shown, a threaded shaft 201 is rotatably connected to the inside of the tank body 2. A first driving component 202, which is a servo motor, is fixedly connected to the top of the tank body 2. The output shaft of the first driving component 202 is fixedly connected to the threaded shaft 201. A scraper 203, which is slidably connected to all heat exchange tubes 4, is threadedly connected to the threaded shaft 201. The output shaft of the first driving component 202 can drive the scraper 203 to move up and down through the threaded shaft 201, so that the scraper 203 scrapes off the crystals attached to the outside of all heat exchange tubes 4. In the initial state, the scraper 203 is located at the lower part of all heat exchange tubes 4. Several first guide elements 204 are provided inside the heat exchange tubes 4. In this embodiment, the first guide elements 204 are fixedly connected to the heat exchange tubes 4. Subsequent embodiments will be described separately. All first guide elements 204 in the same heat exchange tube 4 are fixedly connected to a common thread. A connecting rod 205 is fixedly connected to a second guide member 206, the same number as the first guide member 204. The first guide member 204 is annular and its central axis coincides with the central axis of the corresponding heat exchange tube 4. Water in the heat exchange tube 4 flows towards the center when passing through the first guide member 204. The second guide member 206 is disc-shaped and its central axis coincides with the central axis of the corresponding heat exchange tube 4. Water in the heat exchange tube 4 flows towards the outer periphery when passing through the second guide member 206. The first guide members 204 and the second guide members 206 in the same heat exchange tube 4 are staggered. When the water in the heat exchange tube 4 flows from bottom to top, it alternately passes through the first guide member 204 and the second guide member 206, so that the water circulation in the heat exchange tube 4 is concentrated and dispersed, changing its own flow state and improving the heat exchange rate with the condensate outside the heat exchange tube 4.

[0024] Working principle: When heat recovery from condensate is required, the operator injects condensate into tank 2 through condensate inlet pipe 10. After entering tank 2, the condensate falls onto water storage pan 7, then flows downwards through all the through holes in water storage pan 7 into the corresponding overflow shell 6, accumulating there. This continues until the condensate level reaches the top of overflow shell 6. At this point, the condensate begins to overflow from the overflow shell 6, flowing downwards along the side wall of overflow shell 6 to the outside of heat exchange tube 4. The condensate then continues to flow downwards along the outer wall of heat exchange tube 4 until... Finally, the condensate falls to the scraper 203 at the bottom of the heat exchange tube 4. The condensate flows outward along the scraper 203 and downward along the gap between the inlet plate 5 and the tank body 2, and is finally discharged through the condensate outlet pipe 11. At the same time as the above process begins, water is injected into the inlet pipe 8, so that the water enters the inlet plate 5 along the inlet pipe 8. The water enters several evenly distributed heat exchange tubes 4 along the inlet plate 5 and flows upward. This continues until the water enters the outlet plate 3. Then the water enters the outlet pipe 9 from the outlet plate 3 and is discharged. During this period, the water in the heat exchange tube 4 exchanges heat with the condensate attached to the outside, so that the temperature of the water rises and the temperature of the condensate drops, thereby realizing the recovery and utilization of the heat of the condensate.

[0025] During the upward flow of water along the heat exchange tube 4, the first guide member 204 and the second guide member 206 change the flow state of the water in the heat exchange tube 4, so that the water in the heat exchange tube 4 circulates in a dispersed and then concentrated flow state, thereby making the water in the heat exchange tube 4 uniformly absorb the heat of the external condensate and improve the heat recovery and utilization rate of the condensate. When it is necessary to end the heat exchange work, stop injecting condensate into the condensate inlet pipe 10 and stop injecting water into the liquid inlet pipe 8. When it is necessary to perform heat exchange work again, repeat the above steps.

[0026] After the heat exchange operation is completed, the operator activates the first drive unit 202 and injects cleaning fluid into the condensate inlet pipe 10. The flow process of the cleaning fluid and condensate is the same and will not be described further. The output shaft of the first drive unit 202 drives the threaded shaft 201 to rotate, causing the threaded shaft 201 to drive the scraper 203 to move upward along all the heat exchange tubes 4. The scraper 203 moves upward against the outer wall of all the heat exchange tubes 4, scraping off the crystals attached to them. During this process, the cleaning fluid falls on the upper side of the scraper 203. The cleaning fluid carries the scraped impurities and is discharged along the condensate outlet pipe 11. When the scraper 203 moves upward to its limit position (the top of the heat exchange section of the heat exchange tube 4), the output shaft of the first drive unit 202 moves in the opposite direction, causing the threaded shaft 201 to rotate in the opposite direction and stopping the injection of cleaning fluid into the condensate inlet pipe 10. After the threaded shaft 201 drives the scraper 203 to return to its original position, the first drive unit 202 is turned off. When it is necessary to clean the heat exchange tubes 4 again, the above steps are repeated.

[0027] Example 2 This embodiment provides a device for reusing the heat of esterified steam condensate, which is a further improvement on the device in Embodiment 1.

[0028] like Figures 2-5As shown, the water storage pan 7 and the tank body 2 are connected in a sealed sliding manner. The water storage pan 7 can slide up and down along the tank body 2. Initially, it is located at the bottom of its vertical movement area. A connecting pipe 301 is fixedly connected to the through hole of the water storage pan 7. That is, in this embodiment, the condensate on the upper side of the water storage pan 7 will enter the connecting pipe 301. Initially, the bottom of the connecting pipe 301 is located at the bottom of the corresponding overflow shell 6. The two form a communicating vessel structure, which is used to allow the condensate on the water storage pan 7 to enter the bottom of the overflow shell 6 along the connecting pipe 301, ensuring that the condensate level in the overflow shell 6 remains stable. The overflow shell 6 and the corresponding heat exchange tube 4 are jointly connected in a sealed sliding manner with a drain plate 302. The drain plate 302 is fixedly connected to two corresponding symmetrically distributed connecting pipes 301. A notch is provided at the bottom, through which the connecting pipe 301 guides the condensate to the upper side of the drain plate 302. The water storage pan 7 is fixedly connected to two symmetrically distributed sliding rods 303. The sliding rods 303 are connected to the outlet pan 3 through a through-sealed sliding connection, and the sliding rods 303 are connected to the tank body 2 through a through-sealed sliding connection. The tank body 2 is fixedly connected to two second driving components 304, which are electric push rods. The telescopic ends of the second driving components 304 are fixedly connected to the corresponding sliding rods 303. The telescopic ends of the second driving components 304 can drive the water storage pan 7 to move up and down through the corresponding sliding rods 303, so that the water storage pan 7 drives all the drain plates 302 to move synchronously through the connecting pipe 301, so as to realize the discharge of residual condensate in the overflow shell 6.

[0029] Working principle: During the process of condensate falling from the water storage pan 7 into the overflow shell 6, the condensate on the water storage pan 7 will first enter the corresponding connecting pipe 301 of the overflow shell 6. The condensate flows downward along the connecting pipe 301 and finally falls onto the drain plate 302. The condensate begins to accumulate in the overflow shell 6 and the connecting pipe 301 until the liquid level of the condensate is level with the top of the overflow shell 6. Then the condensate begins to overflow from the top of the overflow shell 6, so that the overflow shell 6 and the connecting pipe 301 form a communication device. That is, the condensate is injected into the bottom of the overflow shell 6 through the connecting pipe 301 to reduce the instability of the condensate liquid level in the overflow shell 6 and ensure the stability of the liquid film formed by the condensate overflowing outward along the overflow shell 6, thereby further improving the heat recovery and utilization rate of the condensate.

[0030] After the heat exchange is completed and the injection of condensate into the condensate inlet pipe 10 is stopped, the two symmetrically distributed second drive components 304 are activated. The telescopic ends of the two second drive components 304 drive the water storage pan 7 upward through the two sliding rods 303, causing the water storage pan 7 to drive the bottom drain plate 302 to move synchronously through the connecting pipe 301. The drain plate 302 moves upward along the corresponding overflow shell 6, pushing the condensate remaining in the overflow shell 6 to overflow until the upper side of the drain plate 302 is flush with the top of the overflow shell 6. Then, the telescopic ends of the two second drive components 304 drive the water storage pan 7 to reset through the two sliding rods 303. The water storage pan 7 drives the corresponding overflow shell 6 to reset synchronously through the connecting pipe 301, and then the two second drive components 304 are closed. During the subsequent cleaning of the heat exchange tube 4, the tilted liquid will also remain in the overflow shell 6. The above steps are repeated after the cleaning is completed.

[0031] Example 3 This embodiment provides a device for reusing the heat of esterified steam condensate, which is a further improvement on embodiment 2.

[0032] like Figures 4-6 As shown, the first guide member 204 is slidably connected to the corresponding heat exchange tube 4. The top of the connecting rod 205 is fixedly connected to the push rod 401. The push rod 401 is slidably connected to the liquid outlet plate 3 through a sealing connection. The top of all the push rods 401 is fixedly connected to the connecting plate 402. The connecting plate 402 is located above the liquid outlet plate 3. The connecting plate 402 is provided with a guide groove 403 inside. The threaded shaft 201 is fixedly connected to the slider 404 located in the guide groove 403. The output shaft of the first drive member 202 drives the slider 404 on it to rotate synchronously through the threaded shaft 201. The slider 404 drives the connecting plate 402 to move up and down through the guide groove 403, thereby realizing the reciprocating up and down movement of the first guide member 204 and the second guide member 206, dynamically changing the flow state of the water in the heat exchange tube 4. The guide groove 403 is a closed annular wave-shaped groove, which is used to make the slider 404 move unidirectionally multiple times along the guide groove 403 to realize the up and down movement of the scraper 203.

[0033] Working principle: During the heat exchange process between water and condensate, the first driving component 202 is activated. The output shaft of the first driving component 202 drives the threaded shaft 201 to reciprocate (the reciprocating rotation amplitude is less than one revolution, reducing the movement amplitude of the scraper 203). The threaded shaft 201 drives the slider 404 on it to rotate synchronously. The slider 404 slides along the guide groove 403. Since the guide groove 403 is a wavy groove, the slider 404 pushes the connecting plate 402 to move up and down reciprocally through the guide groove 403. The connecting plate 402 drives the connecting rod 205 to move synchronously through the push rod 401, so that the connecting rod 205 drives several first guide components 2 on it. 04 and the second guide member 206 move up and down in sync to dynamically change the flow state of the water in the heat exchange tube 4 and improve the uniformity of heat exchange between the water in the heat exchange tube 4 and the external condensate. This continues until the heat exchange process ends and water is no longer injected into the liquid inlet pipe 8 and condensate is no longer injected into the condensate inlet pipe 10. At this time, the output shaft of the first drive member 202 no longer drives the threaded shaft 201 to rotate back and forth. Instead, the threaded shaft 201 drives the scraper 203 to clean upward. During this period, the slider 404 will slide in the closed guide groove 403 until the cleaning work is completed and the scraper 203 is reset and the first drive member 202 is turned off.

[0034] 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 device for reusing heat from esterified steam condensate, comprising a support (1), wherein a tank (2) is fixedly connected to the support (1), an outlet plate (3) is fixedly connected inside the tank (2), the outlet plate (3) is fixedly connected to and communicates with uniformly distributed heat exchange tubes (4), all the heat exchange tubes (4) are fixedly connected to and communicate with an inlet plate (5), and there is a gap between the inlet plate (5) and the tank (2), characterized in that: The heat exchange tube (4) is fixedly connected to an overflow shell (6). A water storage pan (7) is provided inside the tank body (2) between the liquid outlet pan (3) and all the overflow shells (6). The water storage pan (7) is provided with through holes above all the overflow shells (6). The tank body (2) is fixedly connected to an inlet pipe (8) and an outlet pipe (9). The inlet pipe (8) is connected to the inlet pan (5). The outlet pipe (9) is connected to the outlet pan (3). The tank body (2) is fixedly connected to and connected to a condensate inlet pipe (10) and a condensate outlet pipe (11). The condensate inlet pipe (10) is located between the outlet pan (3) and the water storage pan (7).

2. The device for reusing heat from esterified steam condensate according to claim 1, characterized in that: The tank (2) is rotatably sealed with a threaded shaft (201), and the tank (2) is fixedly connected with a first driving member (202). The output shaft of the first driving member (202) is fixedly connected to the threaded shaft (201), and the threaded shaft (201) is threadedly connected with a scraper (203) that is slidably connected to all the heat exchange tubes (4).

3. The device for reusing heat from esterified steam condensate according to claim 2, characterized in that: The heat exchange tube (4) is provided with a plurality of first flow guides (204), and all the first flow guides (204) in the same heat exchange tube (4) are fixedly connected to a connecting rod (205). The connecting rod (205) is fixedly connected to a second flow guide (206) in the same number as the first flow guides (204).

4. The device for reusing heat from esterified steam condensate according to claim 3, characterized in that: The first flow guide (204) is annular and its central axis coincides with the central axis of the corresponding heat exchange tube (4). The second flow guide (206) is disc-shaped and its central axis coincides with the central axis of the corresponding heat exchange tube (4). The first flow guide (204) and the second flow guide (206) in the same heat exchange tube (4) are staggered.

5. The device for reusing heat from esterified steam condensate according to claim 2, characterized in that: The water storage pan (7) and the tank body (2) are connected in a sealed sliding manner.

6. The device for reusing heat from esterified steam condensate according to claim 5, characterized in that: A connecting pipe (301) is fixedly connected to the through hole of the water storage pan (7). The bottom of the connecting pipe (301) is located at the bottom of the overflow shell (6) and is used to allow the condensate on the water storage pan (7) to enter the bottom of the overflow shell (6) along the connecting pipe (301).

7. The device for reusing heat from esterified steam condensate according to claim 6, characterized in that: The overflow shell (6) and the corresponding heat exchange tube (4) are jointly and sealed to slide a drain plate (302). The drain plate (302) is fixedly connected to the corresponding connecting pipe (301). The connecting pipe (301) guides the condensate to the upper side of the drain plate (302). The water storage pan (7) is fixedly connected to symmetrically distributed sliding rods (303). The sliding rods (303) are connected to the liquid outlet pan (3) through a sealed sliding connection. The sliding rods (303) are connected to the tank body (2) through a sealed sliding connection. The tank body (2) is fixedly connected to a second driving member (304) with the same number as the sliding rods (303). The telescopic end of the second driving member (304) is fixedly connected to the corresponding sliding rod (303).

8. The device for reusing heat from esterified steam condensate according to claim 3, characterized in that: The first flow guide (204) and the corresponding heat exchange tube (4) are slidably connected.

9. The device for reusing heat from esterified steam condensate according to claim 8, characterized in that: The connecting rod (205) is fixedly connected to the push rod (401), the push rod (401) is connected to the liquid outlet plate (3) through a sealed sliding connection, all the push rods (401) are fixedly connected to the connecting plate (402), the connecting plate (402) is provided with a guide groove (403), and the threaded shaft (201) is fixedly connected to the slider (404) located in the guide groove (403).

10. The device for reusing heat from esterified steam condensate according to claim 9, characterized in that: The guide groove (403) is a closed, annular wave-shaped groove.

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