Glycerin vacuum condensation treatment device

Abstract

The utility model discloses a glycerol vacuum condensation processing device which comprises an evaporation boiler, a condensation mechanism, a vacuum pump and an air guide pipe, a valve cylinder is arranged on the evaporation boiler, a sliding plate is installed in the valve cylinder in a sliding mode, a pressure relief spring is fixedly installed between the sliding plate and the top wall of the inner side of the valve cylinder, a guide rod is fixedly installed at one end of the sliding plate, and the air guide pipe is fixedly installed at the other end of the sliding plate. A sealing plate is fixedly installed at the other end of the guide rod, a sealing block is slidably installed in the center of the sealing plate, a pressure limiting spring is arranged between the sealing block and the sliding plate, a communicating pipe is fixedly installed on the valve cylinder, and a cooling pipe is fixedly installed at the other end of the communicating pipe. The pressure in the steam kettle can be automatically adjusted, potential safety hazards caused by too high pressure and raw material waste caused by steam overflow due to pressure relief can be avoided, the pressure relief threshold value of the steam kettle can be flexibly adjusted, the system can conduct self-adaptive adjustment according to actual requirements, and the purification efficiency and flexibility are improved.

Description

Technical Field

[0001] This utility model relates to the field of glycerol purification technology, and in particular to a glycerol vacuum condensation treatment device. Background Technology

[0002] Glycerin vacuum condensation is a method for producing refined glycerin. Based on the principle of vacuum condensation, glycerin is vaporized by heating under vacuum, and then the glycerin vapor is rapidly cooled and condensed into liquid using a condenser. Because the pressure is reduced under vacuum, the boiling point of glycerin is also reduced accordingly, thus achieving vaporization and condensation of glycerin at a lower temperature. Glycerin vacuum condensation equipment mainly consists of a distillation tank, multiple sets of condensers in series, and a receiver.

[0003] An investigation revealed that Chinese utility model patent CN208493257U discloses an explosion-proof glycerin-water concentration device, comprising an evaporator, a vapor-liquid separator, and a vacuum condensation system. The steam outlet at the top of the evaporator is connected to the side wall of the vapor-liquid separator via a pipe. The vacuum condensation system is connected to the top of the vapor-liquid separator. An explosion-proof device is installed on the top left side of the evaporator, and a flow-blocking device is installed at the top of the evaporator. Several horizontally coiled spiral steam pipes are located below the flow-blocking device. This device can promptly alert users to pipe blockages, significantly improving overall safety. Furthermore, this device exhibits a fast evaporation rate and high energy efficiency during glycerin-water concentration.

[0004] However, when the pressure inside the evaporator of the aforementioned concentration equipment is too high, steam will leak out from the explosion-proof device. But the leaked steam goes directly to the atmosphere. On the one hand, the directly discharged exhaust gas may carry a small amount of glycerin, resulting in waste of raw materials and failure to meet exhaust gas emission standards. On the other hand, the hot steam directly discharged into the atmosphere may pose a safety hazard and easily cause burns to operators. In addition, a large amount of water vapor is generated during evaporation. Since the diameter of the condensing pipe is usually small to ensure sufficient condensation, the water vapor cannot be discharged in time, which will cause the pressure inside the evaporator to rise significantly. The pressure rise will cause the boiling point of the raw materials to rise, which will lead to a deterioration in the effect of vacuum condensation. At the same time, the heating temperature that can be evaporated in a vacuum is insufficient under high pressure to make the water continue to evaporate, and operators often cannot adjust it in time. Timely and real-time adjustments will also lead to inconvenience in using the equipment or failure to take advantage of vacuum condensation to reduce the heat source.

[0005] Therefore, a glycerol vacuum condensation device needs to be designed to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a glycerol vacuum condensation treatment device.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A glycerol vacuum condensation device includes an evaporator, a condensation mechanism, and a vacuum pump. A gas guide pipe is fixedly installed between the evaporator and the condensation mechanism. A valve cylinder is provided on the evaporator and communicates with it. A sliding plate is slidably installed inside the valve cylinder. A pressure relief spring is fixedly installed between the sliding plate and the inner top wall of the valve cylinder. A plurality of guide rods arranged in a circular array are fixedly installed at the end of the sliding plate away from the pressure relief spring. A sealing plate adapted to the evaporator is fixedly installed at the other end of the guide rods. A through hole is opened in the center of the sealing plate. A sealing block is slidably installed in the through hole. A limiting part adapted to the sealing plate is provided on the top of the sealing block. A pressure relief spring is provided between the sealing block and the sliding plate. A connecting pipe is fixedly installed on the valve cylinder. A cooling pipe is fixedly installed at the other end of the connecting pipe. A return pipe is fixedly installed between the bottom of the cooling pipe and the evaporator. A one-way valve is provided at the end of the return pipe that extends into the evaporator.

[0009] Preferably, the slide plate has a threaded hole, and a screw rod that is screwed into the threaded hole is rotatably installed in the threaded hole. An installation plate is fixedly installed at the end of the screw rod away from the pressure relief spring. The end of the installation plate away from the screw rod is fixedly connected to the pressure limiting spring. A sealing hole is opened at the top of the valve cylinder, and a sealing cap that matches the sealing hole is screwed into the sealing hole.

[0010] Preferably, a float plate is provided inside the cooling pipe, an adjustment box is fixedly installed on the outer wall of the top end of the cooling pipe, a sliding groove is provided inside the adjustment box, a sliding rod is fixedly installed on the float plate and slidably connected to the sliding groove, and the sliding rod is electrically connected to the sliding groove.

[0011] Preferably, a sealing groove is provided on the evaporator at a position corresponding to the valve cylinder, and the sealing groove is adapted to the sealing plate.

[0012] Preferably, the condensation mechanism includes a primary condensation group disposed on and connected to the evaporation pot, a glycerin collection box disposed at the bottom of the primary condensation group, and a low-temperature evaporation group disposed on and connected to the primary condensation group. A normal temperature condensation group is disposed at the end of the low-temperature evaporation group away from the primary condensation group, and the bottom of the primary condensation group is connected to the glycerin collection box.

[0013] Preferably, both the cooling pipe and the ambient temperature condenser are immersed in an ambient temperature water tank.

[0014] This utility model has the following beneficial effects:

[0015] By setting up components such as sealing plates, sealing blocks, and pressure-limiting springs in synergy, the pressure inside the steam boiler is automatically regulated. When the steam generation rate is too fast, the system can automatically open the pressure relief channel to guide the excess steam into the cooling pipe for condensation, thereby reducing the pressure inside the steam boiler. This avoids safety hazards caused by excessive pressure and waste of raw materials due to steam overflow. Furthermore, by adjusting the elasticity of the pressure-limiting spring, the pressure relief threshold of the steam boiler can be flexibly adjusted, thereby controlling the pressure inside the steam boiler and the condensation and purification speed. This allows the system to adaptively adjust according to actual needs, improving purification efficiency and flexibility.

[0016] By using components such as floats, slide bars, chutes, and regulating boxes in combination, the system achieves automatic monitoring and adjustment of evaporation parameters. When the steam generation rate is too fast, the system can automatically reduce the evaporation temperature of the steam boiler to reduce the steam generation rate. Conversely, when the steam generation rate is slow, the system will automatically increase the evaporation temperature to increase the steam generation rate, so that the system can always maintain the best purification efficiency and reduce the need for manual monitoring.

[0017] By using a combination of a primary condensation group, a low-temperature evaporation group, and a room-temperature condensation group, the efficient removal of moisture and impurities from the glycerin raw material is achieved, enabling the production of high-purity, impurity-free, high-quality glycerin. By fully utilizing the waste heat of the evaporation pot to heat the low-temperature evaporation group and collecting water vapor at room temperature, efficient resource utilization is achieved, reducing production costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a glycerol vacuum condensation treatment device proposed in this utility model;

[0019] Figure 2 This is a partial cross-sectional view of a glycerol vacuum condensation treatment device proposed in this utility model;

[0020] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0021] Figure 4 This is a partial explosion diagram of a glycerol vacuum condensation treatment device proposed in this utility model;

[0022] Figure 5 for Figure 2 Enlarged structural diagram at point B;

[0023] Figure 6 for Figure 2 A magnified structural diagram at point C.

[0024] In the diagram: 1. Evaporator; 2. Gas guide pipe; 3. Valve cylinder; 31. Slide plate; 32. Pressure relief spring; 33. Guide rod; 34. Sealing plate; 35. Sealing block; 36. Pressure limiting spring; 37. Connecting pipe; 38. Cooling pipe; 39. Return pipe; 310. One-way valve; 4. Threaded hole; 41. Screw; 42. Mounting plate; 43. Sealing hole; 44. Sealing cover; 5. Float plate; 51. Slide rod; 52. Adjusting box; 53. Slide groove; 6. Sealing groove; 7. First-stage condenser group; 71. Glycerin collection box; 72. Low-temperature evaporation group; 73. Normal-temperature condenser group. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figure 1-6 A glycerol vacuum condensation device includes an evaporator 1, a condensation mechanism, and a vacuum pump. A gas guide pipe 2 is fixedly installed between the evaporator 1 and the condensation mechanism. A valve cylinder 3 is installed on the evaporator 1 and communicates with it. A sliding plate 31 is slidably installed inside the valve cylinder 3. A pressure relief spring 32 is fixedly installed between the sliding plate 31 and the inner top wall of the valve cylinder 3. Several guide rods 33 arranged in a ring array are fixedly installed at one end of the sliding plate 31 away from the pressure relief spring 32. A sealing plate 34 adapted to the evaporator 1 is fixedly installed at the other end of the guide rods 33. A through hole is opened in the center of the sealing plate 34, and a sealing block 35 is slidably installed in the through hole. A limiting part adapted to the sealing plate 34 is provided at the top, and a pressure limiting spring 36 is provided between the sealing block 35 and the sliding plate 31. A connecting pipe 37 is fixedly installed on the valve cylinder 3, and a cooling pipe 38 is fixedly installed at the other end of the connecting pipe 37. A return pipe 39 is fixedly installed between the bottom of the cooling pipe 38 and the evaporator 1. A one-way valve 310 is provided at the end of the return pipe 39 that extends into the evaporator 1. The vacuum pump draws the system to the required vacuum level. The valve cylinder 3 can ensure that the pressure in the evaporator 1 is stable near the preset value, avoiding safety problems caused by excessive pressure and waste of raw materials caused by steam overflow, thus ensuring the safety and purification stability of the system.

[0027] Reference Figure 3 and Figure 4A threaded hole 4 is provided on the slide plate 31. A screw 41, which is screwed into the threaded hole 4, is rotatably installed in the threaded hole 4. An installation plate 42 is fixedly installed at the end of the screw 41 away from the pressure relief spring 32. The end of the installation plate 42 away from the screw 41 is fixedly connected to the pressure limiting spring 36. A sealing hole 43 is provided on the top of the valve cylinder 3. A sealing cover 44 that matches the sealing hole 43 is screwed into the sealing hole 43. By adjusting the elastic force of the pressure limiting spring 36, the pressure relief threshold of the steam boiler can be flexibly adjusted, thereby controlling the pressure in the evaporator 1 and thus controlling the condensation and purification speed. This allows the system to be adjusted according to actual needs, improving the stability of system operation and the controllability of system condensation speed.

[0028] Reference Figure 2 and Figure 5 A float plate 5 is installed inside the cooling pipe 38, and an adjustment box 52 is fixedly installed on the outer wall of the top of the cooling pipe 38. A sliding groove 53 is opened inside the adjustment box 52. A sliding rod 51 that is slidably connected to the sliding groove 53 is fixedly installed on the float plate 5. The sliding rod 51 and the sliding groove 53 are electrically connected. This realizes the automatic monitoring and adjustment of the system evaporation parameters. When the steam generation rate is too fast, the system can automatically reduce the evaporation temperature of the steam boiler to reduce the steam generation rate. Conversely, when the steam generation rate is slow, the system will automatically increase the evaporation temperature to increase the steam generation rate, so that the system can always maintain the best purification efficiency.

[0029] Reference Figure 3 A sealing groove 6 is provided on the evaporator 1 at a position corresponding to the valve cylinder 3, and the sealing groove 6 is adapted to the sealing plate 34; this can ensure the connection function during vacuuming while ensuring the sealing between the valve cylinder 3 and the steam pot 1.

[0030] Reference Figure 1 The condensation mechanism includes a primary condensation group 7 installed on and connected to the evaporator 1, a glycerol collection box 71 installed at the bottom of the primary condensation group 7, and a low-temperature evaporation group 72 installed on and connected to the primary condensation group 7. A normal temperature condensation group 73 is installed at the end of the low-temperature evaporation group 72 away from the primary condensation group 7. The bottom of the primary condensation group 7 is connected to the glycerol collection box 71. This achieves efficient removal of moisture and impurities from the glycerol raw material, and can produce high-purity, impurity-free, high-quality glycerol.

[0031] Reference Figure 1 The cooling pipe 38 and the ambient temperature condenser group 73 are both immersed in an ambient temperature water tank; this achieves efficient use of resources, eliminates the need for additional refrigerant for cooling, and reduces production costs.

[0032] The specific working principle of this utility model is as follows:

[0033] During use, after adding the raw materials, the system is first evacuated to the required vacuum level using a vacuum pump. During evacuation, the pressure inside the evaporator 1 decreases. At this time, the pressure in the cooling pipe 38 is higher than the pressure inside the evaporator 1. Therefore, the sealing plate 34 will move the sliding plate 31 downwards under pressure. Simultaneously, the one-way valve 310 can be opened by the pressure, connecting the cooling pipe 38 and the evaporator 1, allowing the cooling pipe 38 to reach a vacuum state simultaneously. During purification, the evaporator 1 is heated, generating a large amount of steam, which flows to the condensation mechanism through the gas guide pipe 2. When the steam generation rate is much higher than the discharge rate, the pressure inside the evaporator 1 rises. When it reaches a limit value that would affect the evaporation efficiency or the safety of the evaporator 1, the sealing plate 34 abuts against the evaporator 1 under pressure. The sealing block 35 slides upwards along the guide rod 33 under pressure, squeezing the pressure-limiting spring. Spring 36 allows steam to enter cooling pipe 38 through connecting pipe 37. The diameter of connecting pipe 37 and the area of ​​sealing block 35 are much larger than the diameter of condenser pipe, which can quickly reduce the pressure in evaporator 1. After steam flows into cooling pipe 38, it is converted into liquid at the bottom of cooling pipe 38 due to immersion in room temperature water or other cooling methods. When the liquid accumulates to a certain value, it can flow back to evaporator 1 through one-way valve 310 for repurification, thus avoiding steam overflow and air pollution, which would lead to waste of raw materials. At the same time, it protects the pressure in evaporator 1 and keeps it stable near the preset value, ensuring the safety of system operation. When the pressure in evaporator 1 decreases, sealing block 35 seals the connection under the action of pressure limiting spring 36, so that enough steam can flow into condensation mechanism, ensuring sufficient purification and condensation efficiency.

[0034] By opening the sealing cover 44 and rotating the screw 41, the distance between the mounting plate 42 and the sealing block 35 can be adjusted. Since the sealing block 35 is limited by the limiting part to a position coplanar with the sealing plate 34, the pressure limiting spring 36 will be compressed, thereby changing the elastic force. By adjusting the pressure of the pressure limiting spring 36 on the sealing block 35, the pressure relief threshold of the evaporator 1 can be adjusted, and thus the pressure inside the evaporator 1 can be adjusted. Because the higher the pressure, the faster the steam flows to the condensing mechanism, the required condensation and purification speed can be controlled by adjusting the pressure threshold.

[0035] When steam flows into cooling pipe 38 and transforms into liquid, it can cause float plate 5 to float upward, thereby moving slide rod 51 and changing the length of slide rod 51 in slide groove 53. The slide rod 51 and slide groove 53 are electrically connected. By changing the length of the connecting part between slide rod 51 and slide groove 53, the corresponding resistance can be changed. Then, a command is sent through regulating box 52. When the steam generation rate is too fast, the system heating temperature is too high, and the excessive steam generation rate can easily lead to excessive pressure within the system, reducing the efficiency of vacuum condensation. This causes a large amount of steam to flow into cooling pipe 38 through the pressure relief effect of valve cylinder 3. At this time, slide rod 51 moves upward, increasing the connection length with slide groove 53. The regulating box 52 receives this signal and transmits an electrical signal to lower the evaporation temperature of evaporator 1, appropriately reducing the steam generation rate. This allows for timely and automatic adjustment of system evaporation parameters to ensure the efficiency of vacuum condensation. The system controls the pressure inside the evaporator 1 to ensure safe production. When the evaporation temperature is too low and the steam generation is slow, the generated steam will first be converted into liquid through the condensation mechanism. This makes the pressure inside the evaporator 1 less than the pressure exerted on the one-way valve 310 by the unliquefied gas at the top and the liquid at the bottom of the cooling pipe 38. As a result, the liquid in the cooling pipe 38 can flow back to the evaporator 1 through the one-way valve 310 and simultaneously drive the float 5 to descend. At this time, the slide bar 51 moves up and the connection length with the slide groove 53 is reduced. The regulating box 52 can receive the signal and transmit an electrical signal to increase the evaporation temperature of the evaporator 1 and appropriately increase the steam generation rate. This reduces the need for manual monitoring. While ensuring pressure safety, the evaporation temperature setting can be automatically adjusted according to the system status. The signal transmission and reception method and connection method of the regulating box 52 are existing mature technologies, which will not be elaborated on here.

[0036] In the purification of glycerol, in addition to a large amount of water, impurities are also present. Therefore, the condensation mechanism consists of a primary condensation group 7, a low-temperature evaporation group 72, and a normal-temperature condensation group 73. First, the temperature inside the evaporation pot 1 is heated to a state where glycerol can evaporate. At this time, glycerol vapor and water vapor enter the primary condensation group 7 together. The primary condensation group 7 uses a relatively high condensation temperature, which allows the glycerol vapor to liquefy and flow into the glycerol collection box 71. At this time, the water vapor continues to flow to the next device, thus obtaining high-purity, impurity-free, high-quality glycerol. However, the primary condensation group 7 cannot achieve 100% complete condensation of glycerol vapor in the mixed vapor. Therefore, a low-temperature evaporation group 72 is set up. When the gas enters the low-temperature evaporation group 72, due to the low temperature, the vapor can be completely condensed into glycerol and water. The mixture of liquids is heated by a low-temperature heating element at the bottom of the low-temperature evaporation unit 72. The residual heat from the evaporation pot 1 can provide continuous heat to the low-temperature evaporation unit 72. Since the system is under vacuum, the boiling point of water is extremely low. Therefore, a small amount of residual heat can make the water evaporate again and enter the ambient temperature condensation unit 73. The water vapor is condensed and collected at a lower temperature, so that the insufficiently condensed glycerol is liquefied and purified in the low-temperature evaporation unit 72. Through the above series of devices, the moisture and impurities in the glycerol raw material can be removed, and the purity of the purified glycerol can be improved. At the same time, the residual heat from the evaporation pot 1 is used to perform secondary purification of the incompletely condensed mixture, and the water vapor is condensed and collected at ambient temperature. This can improve the purification efficiency while saving resources and costs.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A glycerol vacuum condensation treatment device, comprising an evaporation pot (1), a condensation mechanism, and a vacuum pump, wherein a gas guide pipe (2) is fixedly installed between the evaporation pot (1) and the condensation mechanism, characterized in that, A valve cylinder (3) is provided on the evaporator (1), and the valve cylinder (3) is connected to the evaporator (1). A sliding plate (31) is slidably installed inside the valve cylinder (3). A pressure relief spring (32) is fixedly installed between the sliding plate (31) and the inner top wall of the valve cylinder (3). Several guide rods (33) arranged in a ring array are fixedly installed at one end of the sliding plate (31) away from the pressure relief spring (32). A sealing plate (34) adapted to the evaporator (1) is fixedly installed at the other end of the guide rods (33). A through hole is opened in the center of the sealing plate (34). A sealing block (35) is slidably installed in the through hole. The top of the sealing block (35) is provided with a limiting part that is compatible with the sealing plate (34). A pressure-limiting spring (36) is provided between the sealing block (35) and the sliding plate (31). A connecting pipe (37) is fixedly installed on the valve cylinder (3). A cooling pipe (38) is fixedly installed at the other end of the connecting pipe (37). A return pipe (39) is fixedly installed between the bottom of the cooling pipe (38) and the evaporator (1). A one-way valve (310) is provided at one end of the return pipe (39) that extends into the evaporator (1).

2. The glycerol vacuum condensation treatment apparatus according to claim 1, characterized in that, The slide plate (31) has a threaded hole (4), and a screw (41) screwed into the threaded hole (4) is rotatably installed in the threaded hole (4). An mounting plate (42) is fixedly installed at the end of the screw (41) away from the pressure relief spring (32). The end of the mounting plate (42) away from the screw (41) is fixedly connected to the pressure limiting spring (36). A sealing hole (43) is opened at the top of the valve cylinder (3), and a sealing cap (44) that matches the sealing hole (43) is screwed into the sealing hole (43).

3. The glycerol vacuum condensation treatment apparatus according to claim 1, characterized in that, A float plate (5) is provided inside the cooling pipe (38). An adjustment box (52) is fixedly installed on the outer wall of the top end of the cooling pipe (38). A sliding groove (53) is provided inside the adjustment box (52). A sliding rod (51) that is slidably connected to the sliding groove (53) is fixedly installed on the float plate (5). The sliding rod (51) is electrically connected to the sliding groove (53).

4. The glycerol vacuum condensation treatment apparatus according to claim 2, characterized in that, A sealing groove (6) is provided on the evaporator (1) at a position corresponding to the valve cylinder (3), and the sealing groove (6) is adapted to the sealing plate (34).

5. The glycerol vacuum condensation treatment apparatus according to claim 1, characterized in that, The condensation mechanism includes a primary condensation group (7) disposed on and connected to the evaporation pot (1), a glycerol collection box (71) disposed at the bottom of the primary condensation group (7), and a low-temperature evaporation group (72) disposed on and connected to the primary condensation group (7). A normal temperature condensation group (73) is disposed at the end of the low-temperature evaporation group (72) away from the primary condensation group (7). The bottom of the primary condensation group (7) is connected to the glycerol collection box (71).

6. The glycerol vacuum condensation treatment apparatus according to claim 5, characterized in that, Both the cooling pipe (38) and the ambient temperature condenser group (73) are immersed in an ambient temperature water tank.

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