Cooling device for a furanone production plant

Abstract

This invention discloses a cooling device for furanone production equipment, relating to the technical field of cooling devices. The cooling device for furanone production equipment includes a main body, which comprises a jacket, a cooling shroud disposed within the jacket, and a cooling fluid circulation device for circulating coolant into the cooling shroud. This cooling device for furanone production equipment uses a drive mechanism to synchronously raise and lower the cooling shroud and the extrusion mechanism. A temperature sensor detects the material temperature; when a local temperature is too high, the extrusion mechanism isolates the high-temperature material and, after extrusion, allows it to flow along the inner wall of the shell. Simultaneously, the cooling fluid circulation device supplies circulating coolant into the cooling shroud, which exchanges heat through the shell. This allows for targeted and rapid cooling of the high-temperature material, reducing the extent of the high-temperature impact. It eliminates the need to circulate coolant throughout the entire jacket, thus improving both cooling efficiency and coolant utilization.

Description

Technical Field

[0001] This invention relates to the field of cooling device technology, specifically to a cooling device for furanone production equipment. Background Technology

[0002] Furanone is a flavor enhancer. When it is produced using production equipment, it involves multiple exothermic reactions. If this heat cannot be dissipated in time, it can easily accumulate in local areas of the production equipment, causing local temperature spikes. High temperatures may cause the reaction to be too violent, triggering unnecessary side reactions. Therefore, cooling devices are needed for cooling operations. Currently, the main cooling devices are cooling jackets installed on the outside of the production equipment. When cooling is required, coolant is introduced into the entire cooling jacket and combined with internal stirring to achieve the cooling operation of furanone.

[0003] However, when the existing furanone production equipment's cooling device is in use, if the temperature of the material in a local area of ​​the production equipment is high, coolant needs to be circulated throughout the entire cooling jacket to cool the material in the entire production equipment. This is not convenient for targeted and rapid cooling of high-temperature materials, which not only affects the cooling efficiency but also results in low utilization of the coolant. In addition, by stirring, the heat in the high-temperature area is easily dissipated, affecting the temperature of other materials at normal temperatures and expanding the range of high-temperature impact. Summary of the Invention

[0004] The purpose of this invention is to provide a cooling device for furanone production equipment that can isolate high-temperature materials in a certain area and use circulating coolant to cool and reduce their temperature in a targeted and efficient manner, so as to solve the problems of low cooling efficiency and large influence range of high-temperature materials mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cooling device for furanone production equipment, comprising a device body, the device body including a jacket, a cooling shroud disposed within the jacket, and a cooling fluid circulation device for circulating coolant into the cooling shroud; the device body further includes an extrusion mechanism for extruding materials and a drive mechanism for driving the cooling shroud and the extrusion mechanism to move synchronously up and down; the cooling shroud and the extrusion mechanism are correspondingly arranged; the device body further includes multiple temperature sensors connected to the extrusion mechanism;

[0006] The cooling fluid circulation device includes a first liquid storage tank, a first extrusion plate sliding within the first liquid storage tank, and a movable module disposed between the first extrusion plate and the first liquid storage tank; the cooling fluid circulation device also includes a first hose connecting the first liquid storage tank and a cooling cover, a first circulation pump connecting the first liquid storage tank, and a second hose connecting the first circulation pump and the cooling cover; the second hose connects to the lower chamber; the first hose connects to the upper chamber.

[0007] Preferably, the main body of the device further includes a first annular plate connected to the inner wall of the cooling shroud and a first annular groove disposed on the side wall of the first annular plate; the first annular plate divides the internal chamber of the cooling shroud into an upper chamber and a lower chamber; the upper chamber and the lower chamber are connected through the first annular groove.

[0008] Preferably, the cooling fluid circulation device includes a first liquid storage tank, a first extrusion plate sliding within the first liquid storage tank, and a movable module disposed between the first extrusion plate and the first liquid storage tank; the cooling fluid circulation device further includes a first hose connecting the first liquid storage tank and the cooling cover, a first circulation pump connecting the first liquid storage tank, and a second hose connecting the first circulation pump and the cooling cover; the second hose connects to the lower chamber; and the first hose connects to the upper chamber.

[0009] Preferably, the extrusion mechanism includes a first lifting ring, a second lifting ring, and a moving mechanism disposed between the first lifting ring and the second lifting ring; the extrusion mechanism also includes a first disk connected to the first lifting ring, a second disk connected to the second lifting ring, and a first through hole formed on the first disk and the second disk; the extrusion mechanism also includes a sealing mechanism for sealing the first disk and the second disk; the temperature sensor is connected to the second disk.

[0010] Preferably, the sealing mechanism includes a first rotating ring that rotates with the first disk, a second rotating ring that rotates with the second disk, and a second through hole formed on the first and second rotating rings; the first and second rotating rings are capable of providing a movable seal for the first and second disks; the sealing mechanism further includes a rectangular groove formed on the second and first rotating rings and a fixing ring connected to the sidewalls of the first and second lifting rings; the sealing mechanism further includes a driving assembly for driving the second and first rotating rings to rotate.

[0011] Preferably, the driving mechanism includes a first lifting module, a lifting plate connected to the first lifting module, and a first L-shaped plate connected between the lifting plate and the cooling cover; the first L-shaped plate is disposed through the top of the jacket; the driving mechanism further includes a first fixing pipe connected between the lifting plate and the first lifting ring and a fixing rod inserted in the first fixing pipe; the first fixing pipe includes a second fixing pipe connected to the first lifting ring; the fixing rod is connected to the second lifting ring; the first fixing pipe is disposed through the top of the housing.

[0012] Preferably, the moving mechanism includes an iron plate connected to the lifting plate, a guide rod connected between the iron plate and the lifting plate, and a first slider connected between the guide rod and the fixed rod; the first slider is sleeved on the side wall of the guide rod; the moving mechanism further includes an electromagnet connected to the first slider and a first spring connected between the first slider and the iron plate; the first spring is sleeved on the side wall of the guide rod.

[0013] Preferably, the driving assembly includes a second annular plate connected to the first rotating ring, a groove formed on the side wall of the second annular plate, and a second push pin sliding within the groove; the groove includes a spiral groove and a vertical groove connected end to end; the driving assembly also includes an arcuate groove formed on the first and second discs and a push rod inserted into the arcuate groove and connected to the second rotating ring; the push rod passes through the first rotating ring; the driving assembly also includes a lifting assembly for driving the second push pin to slide within the groove.

[0014] Preferably, the lifting assembly includes a ring, a support block connected to the second annular plate, and a telescopic sleeve connecting the support block and the ring; the lifting assembly also includes a second annular groove formed in the side wall of the ring and a first push pin inserted into the second annular groove; the lifting assembly also includes a slot formed in the side wall of the second fixed tube; the first push pin is inserted into the slot and fixed to the fixed rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The cooling device of this furanone production equipment, through the installation of a cooling fluid circulation system, allows the cooling hood and extrusion mechanism to move synchronously up and down within the production equipment during furanone production. Temperature sensors detect the material temperature, and when the material temperature in a localized area is too high, the extrusion mechanism isolates the material in that area and, after extrusion, allows it to flow along the inner wall of the production equipment shell. Simultaneously, the cooling fluid circulation system supplies circulating coolant into the cooling hood, which exchanges heat with the production equipment shell. This allows the circulating coolant to rapidly and specifically cool the high-temperature material, reducing the extent of the high-temperature impact. Furthermore, it eliminates the need to circulate coolant throughout the entire production equipment through the cooling jacket, thus improving both cooling efficiency and coolant utilization. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram illustrating the usage state of the present invention;

[0019] Figure 3 This is a partial cross-sectional view of the shell and jacket in this invention;

[0020] Figure 4 This is a schematic diagram of the structure of the first lifting ring and the second lifting ring in this invention;

[0021] Figure 5 This is a schematic diagram of the first and second lifting rings from another perspective in this invention;

[0022] Figure 6 This is a schematic diagram of the arc-shaped groove and the push rod in this invention;

[0023] Figure 7 This is a cross-sectional view of the first and second lifting rings in this invention.

[0024] Figure 8 This is a cross-sectional view of the jacket, cooling cover, and first annular plate in this invention.

[0025] Figure 9 This is a schematic diagram of the drive mechanism in this invention;

[0026] Figure 10 for Figure 4 Enlarged structural diagram at point A;

[0027] Figure 11 for Figure 6 Enlarged structural diagram at point B;

[0028] Figure 12 for Figure 7 A magnified structural diagram at point C.

[0029] In the diagram: 201, First liquid storage tank; 203, First hose; 204, Second hose; 205, First extrusion plate; 206, Moving module; 207, First circulating pump; 301, First lifting module; 303, First L-shaped plate; 401, First fixed pipe; 402, Second fixed pipe; 403, Fixed rod; 404, Lifting plate; 405, Guide rod; 406, First slider; 407, First spring; 408, Electromagnet; 409, Iron plate; 501, Second annular plate; 502, Spiral groove; 503, Vertical groove; 504, Second push pin; 505, Arc groove; 506, Push rod; 601, Support block; 602, Telescopic sleeve rod; 604, Circular ring; 605, Second annular groove; 606, Groove opening; 607, First push pin; 1001, Second liquid storage tank. Box; 1002, Temperature control module; 1003, Second lifting module; 1004, Second extrusion plate; 1005, Fourth hose; 1006, Second circulation pump; 1007, Third hose; 1101, Jacket; 1102, Cooling cover; 1103, First annular plate; 1104, Upper chamber; 1105, Lower chamber; 1106, First annular groove; 1107, First lifting ring; 1108, Fixed ring; 1109, Second lifting ring; 1110, Second through hole; 1111, First disc; 1113, Second disc; 1115, Second rotating ring; 1116, Rectangular groove; 1117, First rotating ring; 1118, First through hole; 1201, Shell; 1202, Stirring rod; 1203, Stirring plate; 1204, Feeding valve; 1205, Discharge valve. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-12This invention provides a cooling device for furanone production equipment, comprising a main body, which includes a jacket 1101, a cooling cover 1102 disposed within the jacket 1101, and a cooling fluid circulation device for circulating coolant into the cooling cover 1102; the main body also includes an extrusion mechanism for extruding materials and a drive mechanism for synchronously raising and lowering the cooling cover 1102 and the extrusion mechanism; the cooling cover 1102 is correspondingly disposed with the extrusion mechanism; the main body also includes multiple temperature sensors connected to the extrusion mechanism; during furanone production, the drive mechanism drives the cooling cover and the extrusion mechanism to synchronously raise and lower within the production equipment. The temperature of the material is detected by a temperature sensor. When the temperature of the material in a local area is too high, the material in that area is isolated by the extrusion mechanism and extruded and then flows along the inner wall of the shell 1201 of the production equipment. At the same time, circulating coolant is supplied to the cooling shroud 1102 through the cooling fluid circulation device and heat exchanged through the shell 1201 of the production equipment. This allows the circulating coolant to cool the high-temperature material in a targeted and rapid manner, reducing the range of the high temperature effect. Furthermore, it is not necessary to use the entire cooling jacket 1101 to circulate coolant to cool the material in the entire production equipment, which not only improves the cooling efficiency but also increases the utilization rate of the coolant.

[0032] In addition to the shell 1201 and the jacket 1101, the production equipment also includes a stirring rod 1202, a stirring plate 1203, a feeding valve 1204, and a discharging valve 1205. The jacket 1101 is fixedly sleeved on the side wall of the shell 1201. The portion of the shell 1201 inside the jacket 1101 uses a heat-conducting material for heat exchange, while the portion of the shell 1201 outside the jacket 1101 is provided with an insulation layer. The outer surface of the cooling cover 1102 is provided with heat-insulating material to prevent heat exchange with the heat transfer oil. Furthermore, a sealing gasket is provided on the contact surface with the shell 1201 to ensure a seal. The surface of the jacket 1101 is provided with an insulation layer. The first disc 1111 and the second disc 1113 are sleeved on the stirring rod 1202 and the stirring plate 1205. The first rotating ring 1117 is sleeved on the side wall of the stirring rod 1202, and the stirring plate 1203 is inserted into the rectangular groove 1116, so that the first rotating ring 1117 and the second rotating ring 1115 can rotate normally. When the material is fed through the feeding valve 1204, the material can enter the housing 1201 through the second through hole 1110 and the first through hole 1118. The production equipment also includes a liquid supply mechanism for supplying heat transfer oil into the jacket 1101; the liquid supply mechanism includes a second liquid storage tank 1001, a second extrusion plate 1004 sliding in the second liquid storage tank 1001, and a second lifting module 1003 connecting the second liquid storage tank 1001 and the second extrusion plate 1004; the liquid supply mechanism also includes a second extrusion plate 1004 sliding in the second liquid storage tank 1001 and the second extrusion plate 1004; the liquid supply mechanism also includes a second extrusion plate 1004 sliding in the second extrusion plate 1001 and the second extrusion plate 1004. The pressure plate 1004 is connected to a second circulation pump 1006 and communicates with the second liquid storage tank 1001, a third hose 1007 connects the second circulation pump 1006 and the jacket 1101, and a fourth hose 1005 connects the second liquid storage tank 1001 and the jacket 1101. The liquid supply mechanism also includes a temperature control module 1002 connected to the second liquid storage tank 1001. The temperature control module 1002 is a well-known technology in this field and will not be described in detail here. It can adjust and control the temperature of the heat transfer oil. When the material needs to be heated, the second lifting module 1003 drives the second extrusion plate 1004 to move downward along the second liquid storage tank 1001, thereby enabling the heat transfer oil temporarily stored in the second liquid storage tank 1001 to be heated. The oil is squeezed, allowing the heat transfer oil in the second storage tank 1001 to be filled into the jacket 1101 through the fourth hose 1005 and the third hose 1007. Then, the second circulation pump 1006 is started to circulate the heat transfer oil in the jacket 1101, making the heating of materials more convenient, faster, and more efficient. Furthermore, the temperature of the heat transfer oil can be controlled by the temperature control module 1002, thereby controlling the heating temperature of the materials. After heating is completed, the second extrusion plate 1004 can be moved upward and reset by the second lifting module 1003. At this time, the heat transfer oil in the jacket 1101 can return to the second storage tank 1001 for temporary storage. The side wall of the second storage tank 1001 is provided with heat insulation material.

[0033] The main body of the device also includes a first annular plate 1103 connected to the inner wall of the cooling cover 1102 and a first annular groove 1106 disposed on the side wall of the first annular plate 1103; the first annular plate 1103 divides the internal chamber of the cooling cover 1102 into an upper chamber 1104 and a lower chamber 1105; the upper chamber 1104 and the lower chamber 1105 are connected through the first annular groove 1106, and circulating coolant is supplied into the cooling cover 1102 through a cooling fluid circulation device. It first enters the lower chamber 1105, and then enters the upper chamber 1104 through the first annular groove 1106. When the coolant flows through the first annular groove 1106, the utilization rate and cooling efficiency of the coolant can be improved.

[0034] The cooling fluid circulation device includes a first liquid storage tank 201, a first extrusion plate 205 sliding within the first liquid storage tank 201, and a moving module 206 disposed between the first extrusion plate 205 and the first liquid storage tank 201. The device also includes a first hose 203 connecting the first liquid storage tank 201 and the cooling cover 1102, a first circulation pump 207 connecting the first liquid storage tank 201, and a second hose 204 connecting the first circulation pump 207 and the cooling cover 1102. The second hose 204 is connected to the lower chamber 1105, and the first hose 203 is connected to the upper chamber 1104. Activating the first circulation pump 207 allows the coolant in the first liquid storage tank 201 to enter the lower chamber 1105 through the second hose 204, then enter the upper chamber 1104 through the first annular groove 1106, and finally return to the first liquid storage tank 201 through the first hose 203, thus circulating the coolant in the cooling cover 1102 more conveniently and quickly.

[0035] The extrusion mechanism includes a first lifting ring 1107, a second lifting ring 1109, and a moving mechanism disposed between the first lifting ring 1107 and the second lifting ring 1109; the extrusion mechanism also includes a first disk 1111 connected to the first lifting ring 1107, a second disk 1113 connected to the second lifting ring 1109, and a first through hole 1118 formed on the first disk 1111 and the second disk 1113; the extrusion mechanism also includes a sealing mechanism for sealing the first disk 1111 and the second disk 1113; a temperature sensor is connected to the second disk 1113, and when the temperature sensor detects a certain... When the material temperature in the area is too high, the sealing mechanism seals the first disc 1111 and the second disc 1113 to form a sealed state, thereby isolating the material in the area and reducing the range of high temperature influence. The moving mechanism drives the second lifting ring 1109, the second disc 1113 and the second rotating ring 1115 to move upward. When the second disc 1113 moves upward, it can squeeze the high-temperature material between the first disc 1111 and the second disc 1113 and discharge it along the gap between the fixed ring 1108 and the inner wall of the shell 1201, which facilitates the rapid heat exchange between the high-temperature material and the shell 1201.

[0036] The sealing mechanism includes a first rotating ring 1117 that rotates with the first disc 1111, a second rotating ring 1115 that rotates with the second disc 1113, and a second through hole 1110 formed on the first rotating ring 1117 and the second rotating ring 1115; the first rotating ring 1117 and the second rotating ring 1115 are capable of providing a movable seal between the first disc 1111 and the second disc 1113; the sealing mechanism also includes a rectangular groove 1116 formed on the second rotating ring 1115 and the first rotating ring 1117, and a fixing ring 1 connected to the sidewalls of the first lifting ring 1107 and the second lifting ring 1109. 108; The sealing mechanism also includes a drive assembly for driving the second rotating ring 1115 and the first rotating ring 1117 to rotate. The drive assembly drives the second rotating ring 1115 and the first rotating ring 1117 to rotate. At the same time, when the first rotating ring 1117 rotates, it can drive the second rotating ring 1115 to rotate through the push rod 506, so that the first through hole 1118 and the second through hole 1110 are misaligned. At this time, the first disk 1111 and the second disk 1113 form a sealed state, which facilitates the sealing of the first disk 1111 and the second disk 1113.

[0037] The driving mechanism includes a first lifting module 301, a lifting plate 404 connected to the first lifting module 301, and a first L-shaped plate 303 connected between the lifting plate 404 and the cooling cover 1102; the first L-shaped plate 303 is disposed through the top of the jacket 1101; the driving mechanism also includes a first fixing tube 401 connected between the lifting plate 404 and the first lifting ring 1107 and a fixing rod 403 inserted in the first fixing tube 401; the first fixing tube 401 includes a second fixing tube 402 connected to the first lifting ring 1107; the fixing rod 403 is connected to the second lifting ring 1109; the first fixing tube 401 is disposed through the top of the housing 1201 and is driven to lift by the first lifting module 301. Plate 404 moves downwards, and at the same time, the first L-shaped plate 303 drives the cooling cover 1102 to move downwards along the side wall of the housing 1201. Simultaneously, the first fixed pipe 401, the second fixed pipe 402, and the fixed rod 403 drive the first disc 1111 and the second disc 1113 to move downwards synchronously within the housing 1201, so that the material inside the housing 1201 can pass through the first through hole 1118 and the second through hole 1110, and the temperature of the material can be detected by the temperature sensor. This facilitates the synchronous lifting and lowering of the cooling cover 1102 and the extrusion mechanism, ensuring that the high-temperature material extruded by the extrusion mechanism can move towards the cooling cover 1102 and be cooled by heat exchange through the housing 1201.

[0038] The moving mechanism includes an iron plate 409 connected to a lifting plate 404, a guide rod 405 connecting the iron plate 409 and the lifting plate 404, and a first slider 406 connecting the guide rod 405 and a fixed rod 403; the first slider 406 is sleeved on the side wall of the guide rod 405; the moving mechanism also includes an electromagnet 408 connected to the first slider 406 and a first spring 407 connecting the first slider 406 and the iron plate 409; the first spring 407 is sleeved on the side wall of the guide rod 405, and when the material temperature in a certain area is detected to be too high, the electromagnet 408 is energized, and the electromagnet 408 attracts... The iron plate 409 causes the first slider 406 to move upward along the side wall of the guide rod 405. At the same time, the first spring 407 is compressed. When the first slider 406 moves upward, it can drive the fixed rod 403 to move upward, which in turn drives the second lifting ring 1109, the second disc 1113, and the second rotating ring 1115 to move upward. When the fixed rod 403 moves, it can drive the second lifting ring 1109, the second disc 1113, and the second rotating ring 1115 to move upward, which facilitates the movement of the second disc 1113 towards the first disc 1111, thereby extruding the high-temperature material.

[0039] The drive assembly includes a second annular plate 501 connected to the first rotating ring 1117, a groove formed on the side wall of the second annular plate 501, and a second push pin 504 sliding within the groove; the groove includes a spiral groove 502 and a vertical groove 503 connected end to end; the drive assembly also includes an arcuate groove 505 formed on the first disc 1111 and the second disc 1113, and a push rod 506 inserted in the arcuate groove 505 and connected to the second rotating ring 1115; the push rod 506 passes through the first rotating ring 1117; the drive assembly also includes a lifting assembly for driving the second push pin 504 to slide within the groove, the lifting assembly includes... The lifting assembly includes a circular ring 604, a support block 601 connected to the second annular plate 501, and a telescopic sleeve rod 602 connecting the support block 601 and the circular ring 604. The lifting assembly also includes a second annular groove 605 formed on the side wall of the circular ring 604 and a first push pin 607 inserted into the second annular groove 605. The lifting assembly also includes a slot 606 formed on the side wall of the second fixed tube 402. The first push pin 607 is inserted into the slot 606 and fixed to the fixed rod 403. When the fixed rod 403 moves upward, it can drive the first push pin 607 to slide upward along the slot 606, thereby driving the circular ring 604 and the second push pin 602. When pin 504 moves upward, the second push pin 504 slides upward along the spiral groove 502, thereby pushing the second annular plate 501 and the first rotating ring 1117 to rotate. Simultaneously, when the first rotating ring 1117 rotates, it drives the second rotating ring 1115 to rotate via the push rod 506, causing the first through hole 1118 and the second through hole 1110 to be misaligned. At this time, the first disc 1111 and the second disc 1113 form a sealed state, thereby isolating the material in this area and reducing the range of high-temperature influence. When the fixing rod 403 continues to move upward, the spiral groove 502 slides upward along the vertical groove... 503 slides upward. At this time, the first rotating ring 1117 and the second rotating ring 1115 no longer rotate. When the second disc 1113 moves upward, it can squeeze the high-temperature material between the first disc 1111 and the second disc 1113. During the process of the second disc 1113 moving closer to the first disc 1111, it can drive the second annular plate 501 and the first rotating ring 1117 to rotate. When the first rotating ring 1117 rotates, it can drive the second rotating ring 1115 to rotate through the push rod 506, which facilitates the rotation of the first rotating ring 1117 and the second rotating ring 1115.

[0040] A process for producing furanone, employing a cooling device in furanone production equipment, includes the following steps:

[0041] S1: Intermediate synthesis:

[0042] Toluene and ethyl lactate are mixed and dissolved, and then added into shell 1201 in one go;

[0043] Sodium methoxide is mixed with toluene to form a suspension. Stirring is started and the speed is set to 200-300 rpm. The suspension is added dropwise to shell 1201 in a reverse manner within a temperature range of 35-45℃. The addition time is controlled at 2.5-3 hours.

[0044] After the addition is complete, continue to add ethyl chloroacetate dropwise into shell 1201. After the addition is complete, raise the temperature to 80-90℃ and keep the reaction at this temperature for 2-2.5 hours.

[0045] After the reaction is complete, the product is washed with water to obtain the furanone condensation intermediate.

[0046] S2: Cyclic reaction

[0047] Add toluene into the ring shell 1201, start stirring, and set the speed to 250-300 rpm;

[0048] Add sodium methoxide and stir well. Then, add dimethyl oxalate dropwise at 25-30℃. After the addition is complete, keep the temperature for 2-2.5 hours to form the cyclization reaction substrate.

[0049] While maintaining a constant stirring speed, slowly add the furanone condensation intermediate prepared by S1 dropwise over a period of 2-2.5 hours. After the addition is complete, maintain the current temperature for 2-2.5 hours, then raise the temperature to 80-90℃ and hold for 2-2.5 hours. After the holding period, cool the material inside shell 1201 to 20-25℃ to complete the cyclization reaction and form the cyclization product.

[0050] S3: Saponification, Decarboxylation and Purification

[0051] Saponification treatment: Add 10-15% sodium hydroxide aqueous solution to the cyclization reaction product, wherein the mass ratio of sodium hydroxide to cyclization product is 1:8-1:10. Keep the saponification reaction at 40-45℃ and 200-300rpm for 1.5-2 hours.

[0052] Decarboxylation reaction: If dimethyl oxalate is used as the material in S2, the saponification product is directly heated to 70-80℃ and the decarboxylation reaction is maintained for 3-3.5 hours; if diethyl oxalate is used as the material in S2, dimethyl sulfate is first added to the saponification product, and the alkylation reaction is carried out at 40-50℃ for 1-1.5 hours, and then the temperature is raised to 70-80℃ and the decarboxylation reaction is maintained for 3-3.5 hours.

[0053] Purification: After the decarboxylation reaction is completed, the material is cooled to 20-25℃, allowed to stand and separate into layers to remove the aqueous phase, and the organic phase is washed with deionized water until neutral; then, it is concentrated by vacuum distillation at -0.095MPa and 80-90℃ to obtain crude furanone; ethanol is added at a mass ratio of crude product to ethanol of 1:3-1:4, heated to dissolve, and then cooled to 0-5℃ at a rate of 5℃ / h to crystallize, and the crystallized product is collected by filtration; the crystallized product is recrystallized once with ethanol and dried under vacuum at 60-70℃ and -0.09MPa for 4-6 hours to obtain furanone product with a purity ≥98.5%.

[0054] Because the existing production equipment uses a jacket 1101 for heating and cooling, heat stratification is inevitable in large-volume production equipment during production. Furthermore, since the cyclization reaction is exothermic, uneven heat distribution within the equipment leads to localized high temperatures, causing a decrease in the quality of the furanone. While uneven heat distribution can be addressed by stirring to improve material flow and cool locally hot materials, this method has two drawbacks. First, stirring only diffuses heat, requiring coordinated cooling of the entire jacket 1101's coolant. This method is inefficient, and heat diffusion can affect the reaction of materials at normal temperatures. Second, stirring rotates all materials within the jacket, requiring significant stirring force. Additionally, vigorous stirring can cause the materials to impact the side walls of the equipment due to centrifugal force.

[0055] In steps S1 and S2, when the material needs to be heated during the reaction, the second lifting module 1003 drives the second extrusion plate 1004 to move downward along the second storage tank 1001, thereby extruding the heat transfer oil temporarily stored in the second storage tank 1001. This allows the heat transfer oil in the second storage tank 1001 to be filled into the jacket 1101 through the fourth hose 1005 and the third hose 1007. Then, the second circulation pump 1006 is started to circulate the heat transfer oil in the jacket 1101, making the heating of the material more convenient, faster, and more efficient. Furthermore, the temperature of the heat transfer oil can be controlled by the temperature control module 1002, thereby controlling the heating temperature of the material.

[0056] During the reaction, the first lifting module 301 drives the lifting plate 404 to move downward, and at the same time, the first L-shaped plate 303 drives the cooling cover 1102 to move downward along the side wall of the housing 1201. Simultaneously, the first fixed pipe 401, the second fixed pipe 402 and the fixed rod 403 drive the first disc 1111 and the second disc 1113 to move downward synchronously within the housing 1201, so that the material inside the housing 1201 can pass through the first through hole 1118 and the second through hole 1110, and the temperature of the material can be detected by the temperature sensor.

[0057] When the material temperature in a certain area is detected to be too high, stirring can be paused to reduce the impact of the high temperature. Electromagnet 408 is then energized, attracting iron plate 409, causing the first slider 406 to move upwards along the side wall of guide rod 405. Simultaneously, the first spring 407 is compressed. Furthermore, as the first slider 406 moves upwards, it drives the fixed rod 403 upwards, which in turn drives the second lifting ring 1109, the second disc 1113, and the second rotating ring 1115 upwards. When the fixed rod 403 moves upwards, it drives the first push pin 607 along the slot 60. 6. Slide upwards, thereby driving the ring 604 and the second push pin 504 to move upwards, so that the second push pin 504 slides upwards along the spiral groove 502, thereby driving the second annular plate 501 and the first rotating ring 1117 to rotate. At the same time, when the first rotating ring 1117 rotates, it can drive the second rotating ring 1115 to rotate through the push rod 506, so that the first through hole 1118 and the second through hole 1110 are misaligned. At this time, the first disc 1111 and the second disc 1113 form a sealed state, thereby isolating the material in this area and reducing the range of high temperature influence.

[0058] When the fixed rod 403 continues to move upward, the spiral groove 502 slides upward along the vertical groove 503. At this time, the first rotating ring 1117 and the second rotating ring 1115 no longer rotate. When the second disc 1113 moves upward, it can squeeze the high-temperature material between the first disc 1111 and the second disc 1113 and discharge it along the gap between the fixed ring 1108 and the inner wall of the housing 1201. At the same time, the first extrusion plate 205 is moved by the moving module 206, which can squeeze the coolant in the first liquid storage tank 201 into the cooling cover 1102 through the first hose 203 and the second hose 204.

[0059] Next, the first circulation pump 207 is started, allowing the coolant in the first storage tank 201 to enter the lower chamber 1105 through the second hose 204, then enter the upper chamber 1104 through the first annular groove 1106, and then return to the first storage tank 201 through the first hose 203. This circulates the coolant in the cooling shroud 1102. Furthermore, as the coolant flows through the first annular groove 1106, it directly contacts the outer wall of the housing 1201 and exchanges heat with the high-temperature material discharged through the gap between the fixing ring 1108 and the housing 1201. This allows the high-temperature material to continuously flow close to the inner wall of the housing 1201 and exchange heat with the coolant in the cooling shroud 1102 for cooling. This design facilitates targeted cooling of high-temperature materials, improving cooling efficiency and effectiveness while reducing the impact on materials in other areas. This enhances the efficiency and quality of furanone production. During furanone production, the design allows for temperature monitoring of materials within the shell. If the temperature in a particular area is too high, that area can be isolated, reducing the extent of the high-temperature impact. Simultaneously, the material is compressed, allowing it to flow continuously close to the inner wall of the shell and exchange heat with the coolant in the cooling hood. This eliminates the need for cooling the entire shell 1201, enabling targeted cooling of high-temperature materials in specific areas and improving cooling efficiency and effectiveness, thereby enhancing the efficiency and quality of furanone production.

Claims

1. A cooling device for furanone production equipment, comprising a main body, characterized in that: The main body of the device includes a jacket (1101), a cooling cover (1102) disposed within the jacket (1101), and a cooling fluid circulation device for circulating coolant into the cooling cover (1102); the main body of the device also includes an extrusion mechanism for extruding materials and a drive mechanism for driving the cooling cover (1102) to move synchronously up and down with the extrusion mechanism; the cooling cover (1102) is correspondingly disposed with the extrusion mechanism; the main body of the device also includes multiple temperature sensors connected to the extrusion mechanism; The production equipment includes a housing (1201), a jacket (1101) fixedly sleeved on the side wall of the housing (1201), and a cooling shroud (1102) slidably sleeved on the side wall of the housing (1201). When the material temperature in a local area is too high, the material in that area is isolated and squeezed by the extrusion mechanism, and the material flows along the inner wall of the housing (1201). At the same time, circulating coolant is supplied into the cooling shroud (1102) through the cooling fluid circulation device, and the circulating coolant in the cooling shroud (1102) exchanges heat with the material through the housing (1201). The main body of the device also includes a first annular plate (1103) connected to the inner wall of the cooling cover (1102) and a first annular groove (1106) disposed on the side wall of the first annular plate (1103); the first annular plate (1103) divides the internal chamber of the cooling cover (1102) into an upper chamber (1104) and a lower chamber (1105); the upper chamber (1104) and the lower chamber (1105) are connected through the first annular groove (1106); The cooling fluid circulation device includes a first liquid storage tank (201), a first extrusion plate (205) sliding within the first liquid storage tank (201), and a moving module (206) disposed between the first extrusion plate (205) and the first liquid storage tank (201); the cooling fluid circulation device also includes a first hose (203) connecting the first liquid storage tank (201) and the cooling cover (1102), a first circulation pump (207) connecting the first liquid storage tank (201), and a second hose (204) connecting the first circulation pump (207) and the cooling cover (1102); the second hose (204) is connected to the lower chamber (1105); the first hose (203) is connected to the upper chamber (1104).

2. The cooling device for a furanone production equipment according to claim 1, characterized in that: The extrusion mechanism includes a first lifting ring (1107), a second lifting ring (1109), and a moving mechanism disposed between the first lifting ring (1107) and the second lifting ring (1109); the extrusion mechanism also includes a first disk (1111) connected to the first lifting ring (1107), a second disk (1113) connected to the second lifting ring (1109), and a first through hole (1118) opened on the first disk (1111) and the second disk (1113); the extrusion mechanism also includes a sealing mechanism for sealing the first through hole (1118) of the first disk (1111) and the second disk (1113); the temperature sensor is connected to the second disk (1113).

3. The cooling device for a furanone production equipment according to claim 2, characterized in that: The sealing mechanism includes a first rotating ring (1117) that rotates with the first disc (1111), a second rotating ring (1115) that rotates with the second disc (1113), and a second through hole (1110) formed on the first rotating ring (1117) and the second rotating ring (1115); the first rotating ring (1117) and the second rotating ring (1115) are capable of providing a movable seal for the first disc (1111) and the second disc (1113); the sealing mechanism also includes a rectangular groove (1116) formed on the second rotating ring (1115) and the first rotating ring (1117) and a fixing ring (1108) connected to the sidewalls of the first lifting ring (1107) and the second lifting ring (1109); the sealing mechanism also includes a drive assembly for driving the second rotating ring (1115) and the first rotating ring (1117) to rotate.

4. The cooling device for a furanone production equipment according to claim 3, characterized in that: The driving mechanism includes a first lifting module (301), a lifting plate (404) connected to the first lifting module (301), and a first L-shaped plate (303) connected between the lifting plate (404) and the cooling cover (1102); the first L-shaped plate (303) is disposed through the top of the jacket (1101); the driving mechanism also includes a first fixing tube (401) connected between the lifting plate (404) and the first lifting ring (1107) and a fixing rod (403) inserted in the first fixing tube (401); the first fixing tube (401) includes a second fixing tube (402) connected to the first lifting ring (1107); the fixing rod (403) is connected to the second lifting ring (1109); the first fixing tube (401) is disposed through the top of the housing (1201).

5. The cooling device for a furanone production equipment according to claim 4, characterized in that: The moving mechanism includes an iron plate (409) connected to a lifting plate (404), a guide rod (405) connected between the iron plate (409) and the lifting plate (404), and a first slider (406) connected between the guide rod (405) and a fixed rod (403); the first slider (406) is sleeved on the side wall of the guide rod (405); the moving mechanism also includes an electromagnet (408) connected to the first slider (406) and a first spring (407) connected between the first slider (406) and the iron plate (409); the first spring (407) is sleeved on the side wall of the guide rod (405).

6. The cooling device for a furanone production equipment according to claim 5, characterized in that: The drive assembly includes a second annular plate (501) connected to the first rotating ring (1117), a groove formed on the side wall of the second annular plate (501), and a second push pin (504) sliding in the groove; the groove includes a spiral groove (502) and a vertical groove (503) connected end to end; the drive assembly also includes an arc groove (505) formed on the first disc (1111) and the second disc (1113) and a push rod (506) inserted in the arc groove (505) and connected to the second rotating ring (1115); the push rod (506) is disposed through the first rotating ring (1117); the drive assembly also includes a lifting assembly for driving the second push pin (504) to slide in the groove.

7. The cooling device for a furanone production equipment according to claim 6, characterized in that: The lifting assembly includes a ring (604), a support block (601) connected to a second annular plate (501), and a telescopic sleeve (602) connecting the support block (601) and the ring (604); the lifting assembly also includes a second annular groove (605) opened on the side wall of the ring (604) and a first push pin (607) inserted in the second annular groove (605); the lifting assembly also includes a slot (606) opened on the side wall of the second fixed tube (402); the first push pin (607) is inserted in the slot (606) and fixed to the fixed rod (403).

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