Energy-saving jacketed heat exchanger for resorcinol production and use method

Abstract

The invention relates to the technical field of energy-saving heat exchange devices, in particular to an energy-saving jacketed heat exchanger for resorcinol production. Comprising an outer shell, a heat conduction shell is fixedly connected into the outer shell, the heat conduction shell and the outer shell are matched to form a steam cavity, the outer shell is provided with an air inlet and an air outlet which are both communicated with the steam cavity, and a water outlet communicated with the steam cavity is formed in the lower side of the outer shell. A steam cavity is formed in the outer shell, a liquid separation shell is installed on the upper side in the outer shell through a supporting plate, the outer shell is fixedly connected with a liquid inlet pipe communicating with the liquid separation shell, the outer shell is slidably and rotationally connected with a rotary drum located in the steam cavity, and a spiral flow guide plate is arranged on the inner wall of the rotary drum. Steam rises along a spiral path through the flow guide plate, sufficient heat exchange between the steam and liquid medicine is guaranteed, the contact time of the steam and the liquid medicine is prolonged, the steam is prevented from being discharged before heat exchange is completed, and therefore the purpose of saving energy is achieved.

Description

Technical Field

[0001] This invention relates to the field of energy-saving heat exchange device technology, and in particular to an energy-saving jacketed heat exchanger for resorcinol production and its usage method. Background Technology

[0002] Resorcinol is an important fine chemical raw material and intermediate, widely used in resins, rubber, pharmaceuticals, dyes, cosmetics and other fields. Its industrial production route usually involves multiple reaction, separation and purification steps. Among them, the evaporation and purification of intermediate products is one of the key links to ensure the quality and yield of the final product. In the above-mentioned evaporation and purification process, it is usually necessary to heat the solution containing resorcinol or its precursor to boiling point to evaporate the solvent (usually water) or low-boiling-point components, thereby achieving the purpose of concentration or purification. This process requires a large amount of heat energy, mainly provided in the form of saturated steam.

[0003] In the current production of resorcinol through evaporation and purification, jacketed heat exchangers (also known as shell-and-tube heat exchangers) are commonly used as heaters. The typical operating mode involves the solution to be evaporated flowing in the tubes, while saturated steam for heating enters the shell side. This steam condenses on the outer wall of the heat exchange tubes, releasing its latent heat of vaporization, which then transfers heat to the solution inside the tubes, heating it to boiling. However, in this process, the steam velocity distribution is uneven. After entering the shell side, some of the steam tends to follow the path of least resistance (such as the gap between the heat exchange tube bundle and the shell, or the side of the baffle plate cutout). The steam (such as water vapor) flows rapidly through the heat exchanger shell, failing to distribute sufficiently and evenly throughout the tube bundle area. Furthermore, the residence time of the steam is too short. For steam that does not fully contact the tube wall, a large amount of latent heat of vaporization is not fully utilized and is discharged from the heat exchanger along with the condensate. This unused portion of steam heat is directly wasted, meaning that more fresh steam needs to be added to meet the same evaporation demand. This not only directly increases steam consumption and production costs but also results in higher temperatures for the discharged condensate, further carrying away usable heat energy. Summary of the Invention

[0004] To address the technical problem of insufficient contact time between steam and pharmaceutical solution in existing products, this invention provides an energy-saving jacketed heat exchanger for resorcinol production and its usage method.

[0005] Technical Solution: An energy-saving jacketed heat exchanger for resorcinol production includes an outer shell, within which a heat-conducting shell is fixedly connected. The heat-conducting shell and the outer shell cooperate to form a steam cavity. The outer shell is provided with an air inlet and an air outlet, both communicating with the steam cavity. An air outlet is provided on the upper side of the outer shell, and a drain outlet communicating with the steam cavity is provided on the lower side of the outer shell. A liquid separator is installed on the upper side of the outer shell via a support plate. An inlet pipe communicating with the liquid separator is fixedly connected to the outer shell. A rotating cylinder located within the steam cavity is slidably and rotatably connected to the outer shell. The outer shell is provided with a first power module for driving the rotating cylinder to rotate. The rotating cylinder is provided with a spiral-shaped guide plate, the inner wall of which is in contact with the heat-conducting shell. A fixing ring is rotatably connected to the lower side of the rotating cylinder. A pull rod slidably connected to the outer shell is fixedly connected to the fixing ring. The outer shell is provided with a second power module for driving the pull rod to move longitudinally.

[0006] Furthermore, it is particularly preferred that the upper side of the heat-conducting shell is provided with a liquid-guiding ring, and the upper inner side of the liquid-guiding ring is provided with an annular arc surface for guiding liquid.

[0007] Furthermore, it is particularly preferred that the thickness of the guide plate gradually decreases from the side closer to the heat-conducting shell to the side farther away from the heat-conducting shell, and the diameter of the outer wall of the heat-conducting shell gradually decreases from top to bottom.

[0008] Furthermore, it is particularly preferred that a cleaning mechanism is included, which is disposed on the upper side of the outer casing. The cleaning mechanism is used to remove impurities adhering to the inner wall of the heat-conducting shell. The cleaning mechanism includes a servo motor, which is mounted on the upper side of the outer casing. The output shaft of the servo motor is rotatably connected to the upper side of the outer casing. The output shaft of the servo motor is fixedly connected to a spline rod located inside the outer casing. The spline rod is slidably connected to a sliding sleeve. The outer side of the sliding sleeve is rotatably connected to a ring sleeve. The ring sleeve is slidably connected to connecting rods that are centrally symmetrically distributed. The connecting rods are fixedly connected to scrapers for scraping impurities from the inner wall of the heat-conducting shell.

[0009] Furthermore, it is particularly preferred that the scraper is equipped with an intercepting net, and a triangular plate is provided between the scraper and the intercepting net.

[0010] Furthermore, it is particularly preferred that the ring sleeve is provided with an annular cavity, and a sealing ring is sealed and slidably connected within the annular cavity. The symmetrically distributed connecting rods are all fixedly connected to the sealing ring. An air duct is provided on the upper side of the ring sleeve, and the diameter of the air duct is smaller than the diameter of the sealing ring. A one-way valve is provided inside the air duct. A through hole is provided on the upper side of the ring sleeve, and a solenoid valve is provided inside the through hole of the ring sleeve. An infrared rangefinder is provided in the annular cavity within the ring sleeve.

[0011] Furthermore, it is particularly preferred that the sliding sleeve is provided with spiral grooves distributed in a centrally symmetrical manner, and the connecting rod slides within adjacent spiral grooves.

[0012] Furthermore, it is particularly preferred that the sealing ring is fixedly connected to a compression rod that is sealed and slidably connected to the ring sleeve, and the top of the outer casing is used to limit the compression rod.

[0013] Furthermore, it is particularly preferred that a connecting ring is rotatably connected to the outer side of the sliding sleeve, and a multi-stage electric push rod is fixedly connected to the outer shell, with the telescopic end of the multi-stage electric push rod being fixedly connected to the connecting ring.

[0014] The method for using an energy-saving jacketed heat exchanger for resorcinol production, based on the energy-saving jacketed heat exchanger used in resorcinol production, includes the following specific steps: S1: Steam is introduced into the steam cavity, and liquid medicine is introduced into the inner wall of the heat-conducting shell through the liquid inlet pipe. After the steam in the steam cavity comes into contact with the heat-conducting shell, it exchanges heat with the liquid medicine on the inner wall of the heat-conducting shell to evaporate and purify the liquid medicine. S2: The spiral-shaped baffle guides the steam to rise along the spiral path, and the rising steam exchanges heat with the inner wall of the heat-conducting shell. S3: When it is necessary to increase the evaporation rate of the liquid medicine, move the guide plate downward so that some of the steam can rise through the gap between the guide plate and the heat-conducting shell; S4: During the evaporation of the medicine, the scraper rotates and moves downward continuously to scrape off the residue on the inner wall of the heat-conducting shell. S5: After the liquid evaporation process is completed, no more steam will be introduced into the steam cavity.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention uses a guide plate to make the steam rise along a spiral path, ensuring that the steam and the medicine liquid fully exchange heat, increasing the contact time between the steam and the medicine liquid, and avoiding the waste of steam heat due to the steam being discharged before completing the heat exchange, thereby achieving the purpose of energy saving. Moreover, by changing the position of the guide plate, the heat exchanger can adapt to different steam intake volumes, and the rotating guide plate will scrape off the water adhering to the outer wall of the heat-conducting shell, ensuring the contact area between the steam and the outer wall of the heat-conducting shell, so that the steam and the medicine liquid can better carry out the heat exchange process. The scraper removes the residue on the inner wall of the heat-conducting shell, achieving the cleaning of the inner wall of the heat-conducting shell, ensuring that the subsequent medicine liquid fully contacts the inner wall of the heat-conducting shell, and indirectly detecting the approximate content of the residue on the inner wall of the heat-conducting shell through the position of the sealing ring, which makes it convenient for the operator to adjust the data parameters of the heat exchanger. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural cross-sectional view of the present invention; Figure 3 This is a three-dimensional structural diagram of the rotating drum and guide plate of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the three-dimensional structure at point A in the middle; Figure 5 This is a three-dimensional structural diagram of the outer shell and the guide plate of the present invention in a separated state; Figure 6 This is a three-dimensional structural diagram of the heat-conducting shell and spline rod of the present invention; Figure 7 This is a three-dimensional structural diagram of the impurity removal mechanism of the present invention; Figure 8 This is a three-dimensional structural diagram of the ring and extrusion rod of the present invention.

[0017] In the diagram: 1. Outer shell, 101. Steam cavity, 102. Air inlet, 103. Exhaust port, 104. Air outlet, 2. Heat-conducting shell, 201. Liquid guide ring, 3. Liquid separator shell, 4. Liquid inlet pipe, 5. Rotary drum, 6. Guide plate, 7. Fixing ring, 8. Pull rod, 9. Servo motor, 10. Spline rod, 11. Sliding sleeve, 1101. Spiral groove, 12. Ring sleeve, 1201. Annular cavity, 1202. Air inlet, 1203. Infrared rangefinder, 13. Connecting rod, 14. Scraper, 15. Sealing ring, 16. Extrusion rod, 17. Connecting ring, 18. Multi-stage electric push rod. Detailed Implementation

[0018] Although the invention may be described in relation to specific applications or industries, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "upper side" and "inner side" are used to describe the drawings and not to limit the scope of the invention. The technical solutions of the invention will be further described below with reference to the accompanying drawings.

[0019] Example 1 In the production of resorcinol, its intermediate products need to be purified. Evaporation purification is generally used, where the pharmaceutical solution exchanges heat with hot steam, raising the temperature of the solution and completing the purification process. However, in existing shell-and-tube heat exchangers, the steam velocity distribution is uneven during operation. After entering the shell side, some steam tends to flow quickly along the path of least resistance, failing to fully utilize the heat within the entire tube bundle. This results in the steam's heat being dissipated without being fully utilized, thus wasting resources. Energy-saving jacketed heat exchangers are used in resorcinol production, such as... Figures 1-5As shown, the device includes an outer shell 1, inside which a heat-conducting shell 2 is fixedly connected. The heat-conducting shell 2 is used to exchange heat between the steam and the liquid medicine. The heat-conducting shell 2 and the outer shell 1 cooperate to form a steam cavity 101. The outer shell 1 is provided with an air inlet 102 and an air outlet 103, both of which are connected to the steam cavity 101. The air inlet 102 is located below the air outlet 103. Steam enters the steam cavity 101 through the air inlet 102, completes heat exchange with the heat-conducting shell 2, and then exits through the air outlet 103. An air outlet 104 is provided on the upper side of the outer shell 1 to discharge the vaporized liquid medicine after heat exchange. An air outlet 104 is provided on the lower side of the outer shell 1 to communicate with the steam cavity 101. The drain outlet of the outer shell 1 is used to drain the water condensed in the steam cavity 101. A liquid separator 3 is installed on the upper side of the outer shell 1 via a support plate. An inlet pipe 4 connected to the liquid separator 3 is fixed to the outer shell 1. A liquid guide ring 201 is provided on the upper side of the heat-conducting shell 2. An annular arc surface for guiding liquid is provided on the upper part of the inner side of the liquid guide ring 201. The inlet pipe 4 delivers the liquid medicine into the liquid separator 3. The liquid inlet speed of the liquid separator 3 is greater than the liquid outlet speed, and the liquid separator 3 will gradually fill with liquid medicine. The liquid medicine flows from the bottom of the liquid separator 3 to the top of the liquid guide ring 201. The liquid guide ring 201 guides the liquid medicine evenly to the inner wall of the heat-conducting shell 2, so that the liquid medicine forms a thin film on the inner wall of the heat-conducting shell 2, which facilitates subsequent... In the continued heat exchange process, the outer shell 1 is slidably and rotatably connected to a rotating cylinder 5 located inside the steam cavity 101. The outer shell 1 is equipped with a first power module, which includes a three-phase motor installed on the right side of the outer shell 1. A gear ring is embedded in the lower part of the outer side of the rotating cylinder 5. The output shaft of the three-phase motor drives the rotating cylinder 5 to rotate through a gear set. The thickness of the gear ring of the rotating cylinder 5 is greater than the thickness of the gear inside the first power module. A spiral guide plate 6 is provided on the inner wall of the rotating cylinder 5. The inner wall of the guide plate 6 is in contact with the heat-conducting shell 2. As the steam moves from bottom to top in the steam cavity 101, the steam rises along the spiral path under the guidance of the guide plate 6, increasing the contact time between the steam and the heat-conducting shell 2. This allows the heat of the steam to be fully utilized, achieving energy saving and consumption reduction. The thickness of the guide plate 6 gradually decreases from the side closer to the heat-conducting shell 2 to the side farther away from the heat-conducting shell 2. This causes the water on the outer wall of the heat-conducting shell 2 to flow downwards and come into contact with the guide plate 6. Under the guidance of the guide plate 6, the water moves away from the outer wall of the heat-conducting shell 2. The diameter of the outer wall of the heat-conducting shell 2 gradually decreases from top to bottom. A fixing ring 7 is rotatably connected to the lower side of the rotating drum 5. The fixing ring 7 is fixedly connected to a pull rod 8 that is slidably connected to the outer shell 1. The outer shell 1 is provided with a second power module for driving the pull rod 8 to move longitudinally. The second power module includes an electric push rod (not shown in the figure) installed on the outer shell 1. The telescopic end of the electric push rod is fixedly connected to the lower end of the pull rod 8.

[0020] When this heat exchanger is needed to purify the intermediate product of resorcinol, the specific operation is as follows: The operator first introduces steam into the steam cavity 101 through the air inlet 102. After entering the steam cavity 101, the steam contacts the outer wall of the heat-conducting shell 2. During the process of steam entering the steam cavity 101, the operator introduces the drug solution into the liquid separator 3 through the liquid inlet pipe 4. After the drug solution is discharged from the lower side of the liquid separator 3, it is evenly distributed on the liquid guide ring 201, and then guided by the liquid guide ring 201 to the inner wall of the heat-conducting shell 2 and flows downwards along the inner wall of the heat-conducting shell 2. A thin film forms on the inner wall. Steam transfers heat to the liquid medicine on the inner wall of the heat-conducting shell 2 through the heat-conducting shell 2. The temperature of the liquid medicine on the inner wall of the heat-conducting shell 2 rises and vaporizes, undergoing evaporation and purification. The vaporized liquid medicine is discharged through the vent 104. The operator collects the vaporized liquid medicine. After the steam in the steam cavity 101 completes the heat exchange, it continues to rise and is discharged through the exhaust port 103. The operator collects the discharged hot steam. The liquid medicine that has not been completely evaporated will flow down along the inner wall of the heat-conducting shell 2 and enter the heating container below the outer shell 1, where the evaporation process continues.

[0021] As the steam moves upward within the steam cavity 101, it is guided by the guide plate 6 to rise along a spiral path, increasing the contact time between the steam and the heat-conducting shell 2. This allows the steam's heat to be fully utilized, achieving energy saving and consumption reduction. After heat exchange, the steam temperature decreases, and some of the steam liquefies into water. The water adheres to the outer wall of the heat-conducting shell 2, affecting the subsequent heat exchange process between the steam and the outer wall of the heat-conducting shell 2. The adhered water flows downward and, after contacting the guide plate 6, is guided away from the outer wall of the heat-conducting shell 2. It flows down along the side of the guide plate 6 near the inner wall of the rotating cylinder 5 and enters the lower side of the steam cavity 101, finally being discharged through the drain port of the outer shell 1. The operator collects the discharged water.

[0022] During the process of steam entering the steam cavity 101, the operator starts the first power module to drive the rotating drum 5 to rotate. The rotating drum 5 drives the guide plate 6 to rotate and scrape off the water adhering to the outer wall of the heat-conducting shell 2. This helps to remove the water adhering to the outer wall of the heat-conducting shell 2 and prevents the liquefied water from adhering for a long time and affecting the subsequent heat exchange process of the steam. In addition, during the rotation of the guide plate 6, the guide plate 6 also drives the steam on it to rotate, so that the contact surface between the guide plate 6 and the outer wall of the heat-conducting shell 2 can also exchange heat, thereby improving the efficiency of heat exchange.

[0023] The above mode describes a heat exchange process with low steam intake. When the steam intake rate increases (increasing the steam intake is to accelerate the evaporation of the medicinal liquid, and although the guide plate 6 fully utilizes the heat of the steam, the steam intake is low), the operator uses the second power module to move the pull rod 8 downwards. The pull rod 8 moves the fixed ring 7 and the rotating drum 5 downwards, and the rotating drum 5 moves the guide plate 6 downwards. Since the diameter of the outer wall of the heat-conducting shell 2 gradually decreases from top to bottom, during the downward movement of the guide plate 6, the inner side of the guide plate 6 no longer contacts the outer wall of the heat-conducting shell 2, and the gap between them gradually increases. Figure 5 As shown, at this time, most of the steam moves upward through the gap between the inner side of the guide plate 6 and the outer wall of the heat-conducting shell 2, increasing the amount of steam flow and improving the heat exchange per unit time to adapt to the evaporation process of different medicinal liquids. After the guide plate 6 is separated from the heat-conducting shell 2 for a period of time, water will gradually accumulate on the outer wall of the heat-conducting shell 2. At the same time, the operator periodically controls the second power module to drive the pull rod 8 to move upward, and the guide plate 6 moves upward again to fit against the outer wall of the heat-conducting shell 2, scraping off the water adhering to the outer wall of the heat-conducting shell 2. Thus, the water content on the outer wall of the heat-conducting shell 2 is scraped off before it excessively affects the heat exchange of the heat-conducting shell 2, ensuring that the heat-conducting shell 2 always performs efficient heat exchange. The water on the outer wall of the heat-conducting shell 2 is scraped off alternately by changing the position of the guide plate 6. The guide plate 6 is not always kept separated from the heat-conducting shell 2. After the evaporation process of the medicine is completed, the operator stops the steam from entering the steam cavity 101 and stops the first power module. The steam rises along the spiral path through the guide plate 6, so that the steam and the medicine can fully exchange heat. By changing the position of the guide plate 6, the heat exchanger can adapt to different steam intake volumes. The rotating guide plate 6 will scrape off the water adhering to the outer wall of the heat-conducting shell 2, ensuring the contact area between the steam and the outer wall of the heat-conducting shell 2, so that the steam and the medicine can better exchange heat.

[0024] Example 2 After the liquid medicine evaporates, it will leave residue (impurities) on the inner wall of the heat-conducting shell 2. The residue will affect the subsequent downward transport of the liquid medicine. If it is not cleaned in time, the residue will stick for a long time and become difficult to clean later. Therefore, it is necessary to clean the residue adhering to the inner wall of the heat-conducting shell 2 during the liquid medicine evaporation process.

[0025] Based on Example 1, an energy-saving jacketed heat exchanger for resorcinol production, such as... Figures 6-8As shown, it also includes a cleaning mechanism, which is located on the upper side of the outer shell 1. The cleaning mechanism is used to remove impurities adhering to the inner wall of the heat-conducting shell 2. The cleaning mechanism includes a servo motor 9, which is mounted on the upper side of the outer shell 1. The output shaft of the servo motor 9 is rotatably connected to the upper side of the outer shell 1. The output shaft of the servo motor 9 is fixedly connected to a spline rod 10 located inside the outer shell 1. The spline rod 10 is slidably connected to a sliding sleeve 11. The outer side of the sliding sleeve 11 is rotatably connected to a ring sleeve 12. The ring sleeve 12 is slidably connected to two centrally symmetrically distributed connecting rods 13. The connecting rods 13 consist of a vertical rod part and a horizontal rod part, connecting... A scraper 14 is fixedly connected to the crossbar of rod 13. The connecting rod 13 drives the adjacent scraper 14 to rotate, scraping away impurities from the inner wall of the heat-conducting shell 2. An intercepting net is installed on the rear side of the left scraper 14 and the front side of the right scraper. A triangular plate is set between the scraper 14 and the intercepting net. Taking the right scraper 14 as an example, during the counterclockwise rotation of the scraper 14, the residue on the inner wall of the heat-conducting shell 2 will move to the left side of the scraper 14 and be intercepted by the filter on the front side of the scraper 14. It will also be guided away from the inner wall of the heat-conducting shell 2 by the triangular plate on the scraper 14, thereby preventing the scraped impurities from adhering to the inner wall of the heat-conducting shell 2 again.

[0026] like Figure 7 and Figure 8 As shown, the sleeve 12 has an annular cavity 1201, within which a sealing ring 15 is sealed and slidably connected. Two connecting rods 13 are fixed to the lower side of the sealing ring 15. The sliding connection between the connecting rods 13 and the sleeve 12 is not sealed, ensuring that the air pressure below the sealing ring 15 within the annular cavity 1201 is equal to the external air pressure. An air inlet 1202 is provided on the upper side of the sleeve 12. The diameter of the air inlet 1202 is smaller than the diameter of the sealing ring 15. A one-way valve is provided inside the air inlet 1202. When the pressure inside the annular cavity 1201 increases, the one-way valve in the air inlet 1202 opens. The sleeve 12 has a through hole located to the left of the air inlet 1202. An electromagnetic valve is installed in the through hole of 12. An infrared rangefinder 1203 is installed in the annular cavity 1201 of the ring sleeve 12. The infrared rangefinder 1203 is used to detect the distance between it and the sealing ring 15. The sliding sleeve 11 is provided with two spiral grooves 1101 that are centrally symmetrically distributed. The connecting rod 13 slides in the adjacent spiral grooves 1101. A pressing rod 16 that is sealed and slidably connected to the right side of the upper surface of the sealing ring 15 is fixedly connected to the ring sleeve 12. The top of the outer shell 1 is used to limit the pressing rod 16. A connecting ring 17 is rotatably connected to the outer side of the sliding sleeve 11. A multi-stage electric push rod 18 is fixedly connected to the outer shell 1. The telescopic end of the multi-stage electric push rod 18 is fixedly connected to the connecting ring 17.

[0027] The specific steps are as follows: In the initial state, as shown... Figure 7As shown, the solenoid valve inside the through hole of the ring sleeve 12 is in the closed state. The operator starts the servo motor 9, and the output shaft of the servo motor 9 drives the spline rod 10 to rotate counterclockwise. The spline rod 10 drives the sliding sleeve 11 to rotate counterclockwise. Because the diameter of the air inlet 1202 is small, the sealing ring 15 will only move upward slowly. The air pressure above the annular cavity 1201 increases, and the one-way valve in the air inlet 1202 opens. The sealing ring 15 pushes the gas above the annular cavity 1201 to be discharged through the air inlet 1202. Meanwhile, the two connecting rods 13 move upward slowly. At this time, the sliding sleeve 11 causes the two connecting rods 13 to rotate counterclockwise through the spiral groove 1101. The two connecting rods 13 drive the ring sleeve 12 to rotate counterclockwise. When the servo motor 9 starts, the operator starts the multi-stage electric push rod 18 to drive the connecting ring 17 and the ring sleeve 12 downward. The ring 12 moves downward, causing the sliding sleeve 11 to move downward. The sliding sleeve 11 then moves the two connecting rods 13 and the two scrapers 14 downward. As the scrapers 14 move downward, they rotate counterclockwise to scrape off the residue adhering to the inner wall of the heat-conducting shell 2, thus cleaning the inner wall of the heat-conducting shell 2 and ensuring that the subsequent liquid medicine is in full contact with the inner wall of the heat-conducting shell 2. The scraped residue will fall to the bottom of the outer shell 1. Since the heat-conducting shell 2 is a vertical cylindrical structure, the residue will not come into contact with the inner wall of the heat-conducting shell 2 when it falls, thus ensuring the heat exchange efficiency of the heat-conducting shell 2. After the two scrapers 14 scrape the inner wall of the heat-conducting shell 2 from top to bottom, the sealing ring 15 moves upward a certain distance from its initial position. Even if there are no impurities on the inner wall of the heat-conducting shell 2, the sealing ring 15 will still move upward a rated distance (this distance is the minimum upward movement distance of the sealing ring 15).

[0028] Taking the scraper 14 on the right as an example, during the counterclockwise rotation of the scraper 14, the residue on the inner wall of the heat-conducting shell 2 will enter the left side of the scraper 14 and be intercepted by the filter screen on the front side of the scraper 14. Guided by the triangular plate on the scraper 14, it will move away from the inner wall of the heat-conducting shell 2, thus preventing the scraped-off impurities from adhering to the inner wall of the heat-conducting shell 2 again. During the scraping process, the rear side of the scraper 14 will contact the residue. When the scraper 14 encounters resistance, it drives the connecting rod 13 to rotate clockwise relative to the sliding sleeve 11 (top view direction). The scraper 14 drives the connecting rod... 13 slides along the spiral groove 1101. The connecting rod 13 drives the ring sleeve 12 to rotate clockwise relative to the sliding sleeve 11. When the connecting rod 13 slides along the spiral groove 1101, the connecting rod 13 moves upward under the guidance of the spiral groove 1101. The connecting rod 13 drives the sealing ring 15 to move upward. The air pressure above the annular cavity 1201 increases. The one-way valve in the air guide port 1202 opens. The sealing ring 15 pushes the gas above the annular cavity 1201 to be discharged through the air guide port 1202. Since the diameter of the air guide port 1202 is small, the sealing ring 15 will only move upward slowly.

[0029] During the above process, as long as the resistance on the front side of the scraper 14 increases, the sealing ring 15 will move upward (the distribution of residue on the inner wall of the heat-conducting shell 2: since the liquid flows slowly from top to bottom, most of the liquid has completed the heat exchange process on the upper side of the inner wall of the heat-conducting shell 2, and the residue is also mainly concentrated on the upper side of the inner wall of the heat-conducting shell 2). Therefore, the more residue adhered to the inner wall of the heat-conducting shell 2, the farther the sealing ring 15 will move upward relative to the initial position (greater than the rated distance). When the scraper 14 moves to the lower side of the inner wall of the heat-conducting shell 2, the operator stops the servo motor 9, and the two scrapers 14 no longer rotate. At the same time, the operator records the data of the infrared rangefinder 1203 and detects the upward movement distance of the sealing ring 15 to determine the amount of residue adhered to the inner wall of the heat-conducting shell 2 (the data obtained from this detection process will fluctuate within a certain range, and the operator can refer to it).

[0030] After the data from the infrared rangefinder 1203 is recorded, the operator opens the solenoid valve inside the through hole of the sleeve 12. The operator then controls the multi-stage electric push rod 18 to move the sleeve 12 upwards via the connecting ring 17. The sleeve 12, through the sealing ring 15, moves the pressing rod 16 upwards. When the pressing rod 16 contacts the top of the inner shell 1, it cannot move upwards. At this point, the sleeve 12 continues to move upwards, and the pressing rod 16 moves the sealing ring 15 and the two connecting rods 13 downwards relative to the sleeve 12. When the state returns to normal... Figure 7 When the time comes, the operator stops the third power module and closes the solenoid valve in the through hole of the ring 12, completing the single impurity removal process on the inner wall of the heat-conducting shell 2. The operator can adjust the liquid inlet speed, steam inlet speed, and scraping frequency of residue on the inner wall of the heat-conducting shell 2 according to the data from the infrared rangefinder 1203 to improve the heat exchange efficiency of the liquid.

[0031] Example 3 Based on Example 2, please refer to the following for the usage method of the energy-saving jacketed heat exchanger for resorcinol production. Figures 1-8 The specific steps for using an energy-saving jacketed heat exchanger in resorcinol production are as follows: S1: Steam is introduced into the steam cavity 101, and liquid medicine is introduced into the inner wall of the heat-conducting shell 2 through the liquid inlet pipe 4. After the steam in the steam cavity 101 comes into contact with the heat-conducting shell 2, it exchanges heat with the liquid medicine on the inner wall of the heat-conducting shell 2 to evaporate and purify the liquid medicine. S2: The spiral-shaped guide plate 6 guides the steam to rise along the spiral path, and the rising steam exchanges heat with the inner wall of the heat-conducting shell 2. S3: When it is necessary to increase the evaporation rate of the liquid medicine, move the guide plate 6 downward so that some of the steam can rise through the gap between the guide plate 6 and the heat-conducting shell 2. S4: During the evaporation of the liquid medicine, the scraper 14 rotates and moves downward continuously to scrape off the residue on the inner wall of the heat-conducting shell 2. S5: After the liquid evaporation process is completed, no more steam will be introduced into the steam cavity 101.

[0032] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An energy-saving jacketed heat exchanger for resorcinol production, characterized in that, The device includes an outer shell (1), inside which a heat-conducting shell (2) is fixedly connected. The heat-conducting shell (2) and the outer shell (1) cooperate to form a steam cavity (101). The outer shell (1) is provided with an air inlet (102) and an air outlet (103) that are both connected to the steam cavity (101). An air outlet (104) is provided on the upper side of the outer shell (1), and a drain outlet that is connected to the steam cavity (101) is provided on the lower side of the outer shell (1). A liquid separator (3) is installed on the upper side of the outer shell (1) through a support plate. The outer shell (1) is fixedly connected to the liquid separator (3). The outer shell (1) is slidably and rotatably connected to a rotating cylinder (5) located in the steam cavity (101). The outer shell (1) is provided with a first power module for driving the rotating cylinder (5) to rotate. The rotating cylinder (5) is provided with a spiral guide plate (6). The inner wall of the guide plate (6) is in contact with the heat-conducting shell (2). A fixing ring (7) is rotatably connected to the lower side of the rotating cylinder (5). The fixing ring (7) is fixedly connected to a pull rod (8) that is slidably connected to the outer shell (1). The outer shell (1) is provided with a second power module for driving the pull rod (8) to move longitudinally.

2. The energy-saving jacketed heat exchanger for resorcinol production according to claim 1, characterized in that, The upper side of the heat-conducting shell (2) is provided with a liquid guiding ring (201), and the upper inner side of the liquid guiding ring (201) is provided with an annular arc surface for liquid guiding.

3. The energy-saving jacketed heat exchanger for resorcinol production according to claim 2, characterized in that, The thickness of the guide plate (6) gradually decreases from the side closer to the heat-conducting shell (2) to the side farther away from the heat-conducting shell (2), and the diameter of the outer wall of the heat-conducting shell (2) gradually decreases from top to bottom.

4. The energy-saving jacketed heat exchanger for resorcinol production according to claim 3, characterized in that, It also includes a cleaning mechanism, which is located on the upper side of the outer shell (1). The cleaning mechanism is used to remove impurities adhering to the inner wall of the heat-conducting shell (2). The cleaning mechanism includes a servo motor (9), which is installed on the upper side of the outer shell (1). The output shaft of the servo motor (9) is rotatably connected to the upper side of the outer shell (1). The output shaft of the servo motor (9) is fixedly connected to a spline rod (10) located inside the outer shell (1). The spline rod (10) is slidably connected to a sliding sleeve (11). The outer side of the sliding sleeve (11) is rotatably connected to a ring sleeve (12). The ring sleeve (12) is slidably connected to a connecting rod (13) that is centrally symmetrically distributed. The connecting rod (13) is fixedly connected to a scraper (14) for scraping off impurities from the inner wall of the heat-conducting shell (2).

5. The energy-saving jacketed heat exchanger for resorcinol production according to claim 4, characterized in that, The scraper (14) is equipped with an interception net, and a triangular plate is provided between the scraper (14) and the interception net.

6. The energy-saving jacketed heat exchanger for resorcinol production according to claim 5, characterized in that, The ring sleeve (12) is provided with an annular cavity (1201). A sealing ring (15) is sealed and slidably connected inside the annular cavity (1201). The symmetrically distributed connecting rods (13) are all fixedly connected to the sealing ring (15). An air inlet (1202) is provided on the upper side of the ring sleeve (12). The diameter of the air inlet (1202) is smaller than the diameter of the sealing ring (15). A one-way valve is provided inside the air inlet (1202). A through hole is provided on the upper side of the ring sleeve (12). A solenoid valve is provided inside the through hole of the ring sleeve (12). An infrared rangefinder (1203) is provided in the annular cavity (1201) of the ring sleeve (12).

7. The energy-saving jacketed heat exchanger for resorcinol production according to claim 6, characterized in that, The sliding sleeve (11) is provided with spiral grooves (1101) that are centrally symmetrically distributed, and the connecting rod (13) slides in adjacent spiral grooves (1101).

8. The energy-saving jacketed heat exchanger for resorcinol production according to claim 7, characterized in that, The sealing ring (15) is fixedly connected to the extrusion rod (16) which is sealed and slidably connected to the ring sleeve (12), and the top inside the outer shell (1) is used to limit the extrusion rod (16).

9. The energy-saving jacketed heat exchanger for resorcinol production according to claim 8, characterized in that, The outer side of the sliding sleeve (11) is rotatably connected to a connecting ring (17), and the outer shell (1) is fixedly connected to a multi-stage electric push rod (18), the telescopic end of the multi-stage electric push rod (18) is fixedly connected to the connecting ring (17).

10. A method of using an energy-saving jacketed heat exchanger for resorcinol production, as described in claim 9, characterized in that... The specific steps are as follows: S1: Steam is introduced into the steam cavity (101), and liquid medicine is introduced into the inner wall of the heat-conducting shell (2) through the liquid inlet pipe (4). After the steam in the steam cavity (101) comes into contact with the heat-conducting shell (2), it exchanges heat with the liquid medicine on the inner wall of the heat-conducting shell (2) to evaporate and purify the liquid medicine. S2: The spiral-shaped guide plate (6) guides the steam to rise along the spiral path, and the rising steam exchanges heat with the inner wall of the heat-conducting shell (2). S3: When it is necessary to increase the evaporation rate of the liquid medicine, move the guide plate (6) downward so that some of the steam can pass through the gap between the guide plate (6) and the heat-conducting shell (2) upward; S4: During the evaporation of the liquid medicine, the scraper (14) rotates and moves downward continuously to scrape off the residue on the inner wall of the heat-conducting shell (2); S5: After the liquid evaporation process is completed, steam will no longer be introduced into the steam cavity (101).

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