Polyethylene glycol purification equipment
By setting up an isolation plate and multiple purification chambers inside the reactor, and utilizing a combination of heat source and adsorbent, the problem of the inability to accurately collect single impurities in existing technologies is solved, achieving efficient purification of polyethylene glycol and classification of impurities.
Patent Information
- Application Number
- CN202423048077.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing polyethylene glycol purification processes cannot accurately collect individual impurities.
A polyethylene glycol purification device is used, which forms multiple purification chambers by setting up isolation plates in the reactor body, and uses heat sources at different heights and with increasing or decreasing heat source temperatures, combined with an adsorbent and a ramp structure, to achieve the evaporation and collection of different impurities one by one.
It enables the precise collection of single impurities in polyethylene glycol, facilitating subsequent classification and processing, improving purification and distillation efficiency, reducing energy consumption, and ensuring the integrity of polyethylene glycol during transportation.
Smart Images
Figure CN223504847U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of polyethylene glycol purification technology, specifically a polyethylene glycol purification device. Background Technology
[0002] In existing polyethylene glycol (PEG) distillation purification processes, components with boiling points lower than PEG are vaporized first after depressurization, and then PEG is vaporized to separate it from other impurities with different boiling points. However, existing PEG purification processes cannot achieve the separate collection of individual impurities.
[0003] Therefore, this utility model provides a polyethylene glycol purification device to solve the above problems. Utility Model Content
[0004] The technical problem to be solved by this invention is that the existing polyethylene glycol purification process cannot accurately collect a single impurity.
[0005] This utility model provides the following technical solution: a polyethylene glycol purification device, comprising a vessel body and isolation plates. At least one isolation plate is fixedly installed at intervals inside the vessel body, forming a purification chamber between adjacent isolation plates. The isolation plates include a first isolation plate and a second isolation plate. A first isolation plate is fixedly installed on the uppermost or lowermost side of the vessel body. A second isolation plate is fixedly installed on the side of the first isolation plate farther from the upper and lower ends of the vessel body. A main input pipe is fixedly installed on the side wall of the vessel body on the side of the first isolation plate away from the second isolation plate. A first feed pipe connected to the main input pipe is fixedly installed inside the first isolation plate. A first conveying pipe connected to the first feed pipe is fixedly installed on the side wall of the vessel body. The other end of the first conveying pipe is connected to the purification chamber. A second conveying pipe connected to the purification chamber is fixedly installed inside the second isolation plate. A first heat source with different heating temperatures is fixedly installed inside the purification chamber. A first output pipe is fixedly installed inside the purification chamber.
[0006] A second heat source is fixedly installed on the outer surface of the first feed pipe, the first conveying pipe and / or the second conveying pipe.
[0007] The temperatures of the first heat source and / or the second heat source at different horizontal heights increase or decrease sequentially.
[0008] Multiple second heat sources at the same horizontal height are set up in the horizontal direction, and the temperature of the multiple second heat sources at the same horizontal height increases sequentially along the clinker direction.
[0009] The second heat source is fixedly spirally around the outer surface of the first feed pipe, the first conveying pipe and / or the second conveying pipe.
[0010] The ends of the first feed pipe, the first conveying pipe and / or the second conveying pipe are fitted with detachable adsorbents.
[0011] The first input channel has a ramp structure, and the second input channel has ramp structures at both ends.
[0012] The lower side of the isolation plate has a ramp structure, and the first output pipe is located below the horizontal level of the lower side of the isolation plate.
[0013] The beneficial effects of this utility model are as follows:
[0014] 1. In this utility model, the purification chambers at different levels and the temperature of the first heat source increase or decrease sequentially, thereby heating different impurities to their boiling points in sequence. This allows different impurities to be evaporated and discharged one by one for collection. By collecting the condensed liquid in the condenser at regular intervals, precise collection of a single impurity in polyethylene glycol can be achieved, facilitating subsequent classification and processing of different impurities.
[0015] 2. In this utility model, the second heat source can also uniformly preheat polyethylene glycol during the purification process, reduce the heating time during polyethylene glycol distillation, thereby accelerating the distillation efficiency of polyethylene glycol. It can also make polyethylene glycol heat up uniformly, avoid local overheating which would lead to inconsistent impurities after distillation, and thus improve the effect of accurate collection of single impurities for subsequent classification and processing.
[0016] 2. During the transportation of polyethylene glycol (PEG) in the first feed pipe, second feed pipe, first conveying pipe, and second conveying pipe, the adsorbent can directly adsorb impurities in the PEG, thereby removing impurities and improving PEG purification efficiency. Furthermore, the inclined first and second input channels facilitate the flow and transportation of PEG during transportation, preventing residues and ensuring the integrity of the PEG during purification and transportation. Attached Figure Description
[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a cross-sectional structural diagram of the vessel body of this utility model;
[0020] Figure 3 This is a schematic diagram of the structure of the second heat source in this utility model.
[0021] In the diagram: 1. Reactor body; 2. Purification chamber; 3. First isolation plate; 31. First feed pipe; 4. Second isolation plate; 41. First conveying pipe; 411. Solenoid valve; 42. Second conveying pipe; 5. Main input pipe; 6. First output pipe; 61. Second output pipe; 7. First heat source; 71. Second heat source; 8. Condenser; 9. Adsorbent. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely represents some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and "back side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this utility model is conventionally placed during use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.
[0025] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0026] This disclosure aims to address the problem of the inability to accurately collect a single impurity in existing polyethylene glycol (PEG) purification processes. Therefore, this disclosure proposes a PEG purification device, including a vessel body 1 and isolation plates. At least one isolation plate is fixedly installed at intervals within the vessel body 1, forming a purification chamber 2 between adjacent isolation plates. The isolation plates include a first isolation plate 3 and a second isolation plate 4. The first isolation plate 3 is fixedly installed on the uppermost or lowermost side of the vessel body 1. The second isolation plate 4 is fixedly installed on the side of the first isolation plate 3 further away from the upper and lower ends of the vessel body 1. A main inlet pipe 5 is fixedly installed on the side wall of the vessel body 1, on the side of the first isolation plate 3 furthest from the second isolation plate 4. A first feed pipe 31, communicating with the main inlet pipe 5, is fixedly installed within the first isolation plate 3. A first feed pipe 41, which connects to the first feed pipe 31, is fixedly installed on the side wall of the reactor body 1. The other end of the first feed pipe 41 is connected to the purification chamber 2. A second feed pipe 42, which connects to the purification chamber 2, is fixedly installed inside the second isolation plate 4. The first feed pipe 41, which is fixedly installed on the side wall of the reactor body 1, is used to connect the first feed pipe 31 or the second feed pipe 42 to the adjacent purification chamber 2. A first heat source 7 with different heating temperatures is fixedly installed inside the purification chamber 2. A first output pipe 6 is fixedly installed inside the purification chamber. The first output pipe 6 is connected to an external condenser 8 for condensing the distilled steam. A solenoid valve 411, which controls the opening and closing, is installed inside the first feed pipe 41.
[0027] It should be noted that, in this embodiment of the present disclosure, a first partition plate 3 is fixedly installed on the uppermost side of the vessel body 1, and the first partition plate can also be installed on the lowermost side of the vessel body 1.
[0028] The crude polyethylene glycol raw material is fed into the main inlet pipe 5 and then into the first inlet pipe 31. It then flows along the first inlet pipe 31 into the first feed pipe 41 and finally into the purification chamber 2, where it is distilled and purified by the first heat source 7 at the lowest temperature. This process preserves the polyethylene glycol while first distilling the lowest boiling point impurities to form vapor, which is then discharged through the first outlet pipe 6. After discharging the vapor of these boiling point impurities, the solenoid valve 411 in the second feed pipe 42 is opened, allowing the crude polyethylene glycol solution to leave the current purification chamber 2 and enter the second feed pipe 42. It then flows along the second feed pipe 42 into the first feed pipe 41 and finally into the adjacent purification chamber 2. After the crude polyethylene glycol raw material enters the adjacent purification chamber 2, it is distilled again by the first heat source 7 in the adjacent purification chamber 2, which has an increasing temperature, to remove another impurity with an increasing boiling point. This cycle continues until the first heat source 7 at the highest temperature distills the vapor of the impurity with the highest boiling point, which is then discharged through the first output pipe 6 to the condenser 8 for condensation and collection. In this way, the operator only needs to collect the condensed liquid in the condenser 8 periodically to accurately collect a single impurity in the polyethylene glycol, thus facilitating the precise collection of a single impurity in the polyethylene glycol and enabling subsequent classification and processing of different impurities.
[0029] A second heat source 71 is fixedly installed on the outer surface of the first feed pipe 31, the first conveying pipe 41, and / or the second conveying pipe 42. During the process of feeding the crude polyethylene glycol raw material through the first feed pipe 31 and conveying it through the first conveying pipe 41 and the second conveying pipe 42, the second heat source 71 can preheat the crude polyethylene glycol, thereby reducing the heating time during polyethylene glycol distillation and thus accelerating the distillation efficiency of polyethylene glycol.
[0030] The temperature of the first heat source 7 and / or the second heat source 71 at different horizontal heights increases sequentially along the material conveying direction.
[0031] The first heat source 7 and / or the second heat source 71, with their temperatures increasing sequentially, can distill impurities with increasing or decreasing boiling points during the feeding and conveying of the crude polyethylene glycol solution. This facilitates the precise collection of individual impurities in the polyethylene glycol, enabling subsequent classification and processing of different impurities. For example, when the polyethylene glycol is heated from top to bottom, when it enters the first purification chamber 2, the temperature of purification chamber 2 and the first heat source 7 is 56.05°C, thus only acetone impurities are evaporated and discharged. When the polyethylene glycol enters the second purification chamber 2, the temperature of the second purification chamber 2 with its increasing temperature and the first heat source 7 is 78.37°C, thus only ethanol impurities are evaporated and discharged. When the polyethylene glycol enters the third purification chamber 2, the temperature of the third purification chamber 2 with its increasing temperature is 100°C, thus evaporating and discharging water impurities. When polyethylene glycol contains metal ion impurities with a boiling point higher than that of polyethylene glycol, for polyethylene glycol with an average molecular weight of approximately 200 g / mol, the purification chamber 2 at the highest temperature and the first heat source 7 at atmospheric pressure are 224-240°C. This evaporates the polyethylene glycol and discharges it to the condenser 8 for condensation and collection, leaving high-boiling-point impurities in the purification chamber 2 at the highest temperature, thereby achieving the purification of polyethylene glycol.
[0032] It should be noted that the temperatures of the purification chamber 2 (maximum temperature) and the first heat source 7 can be adjusted adaptively for polyethylene glycol with different molecular weights. For example, the heating and evaporation temperature for polyethylene glycol with an average molecular weight of approximately 200 g / mol is 224-240℃. For polyethylene glycol with an average molecular weight of approximately 400 g / mol, the heating and evaporation temperature is 288-302℃. For polyethylene glycol with an average molecular weight of approximately 1000 g / mol, the heating and evaporation temperature is 330-350℃.
[0033] It should be noted again that, in order to reduce energy consumption and facilitate the heating and evaporation of polyethylene glycol, the pressure inside the vessel 1 in this embodiment can be reduced by using a vacuum pump device in the prior art, thereby lowering the boiling point of polyethylene glycol, and thus facilitating the heating and evaporation of polyethylene glycol of different molecular weights to achieve purification.
[0034] Furthermore, the primary heat source 7 at different heights allows for a segmented temperature increase in polyethylene glycol. At lower temperatures, less energy is required to remove low-boiling-point impurities. This segmented heating allows for targeted energy input based on the specific impurities being removed. For example, heating polyethylene glycol containing impurities from room temperature to 100°C requires less energy than directly heating it to 200°C. This method enables efficient energy utilization, avoiding overheating at unnecessary high temperatures, thereby reducing energy consumption in the purification process and improving its overall economic efficiency.
[0035] It should be noted that if the crude polyethylene glycol solution contains impurities with a boiling point higher than that of the polyethylene glycol solution, the polyethylene glycol solution will eventually be distilled off, retaining the impurities with higher boiling points, thereby achieving purification of the polyethylene glycol. A second output pipe 61 for discharging polyethylene glycol or impurities is fixedly installed at the bottom of the reactor body 1. The remaining polyethylene glycol or impurities in the highest temperature purification chamber 2 can be discharged through the second output pipe 61. A solenoid valve 411 for controlling the opening and closing of the second output pipe 61 is fixedly installed at the second output pipe 61.
[0036] Multiple second heat sources 71 at the same horizontal level are arranged horizontally, with their temperatures increasing sequentially along the material conveying direction. This sequential temperature increase from multiple second heat sources 71 along the same horizontal level allows for gradual preheating of the polyethylene glycol (PEG). This ensures a uniform temperature rise in the PEG solution during distillation, preventing localized high temperatures due to uneven heating and avoiding the simultaneous distillation of multiple impurities. This allows for stable distillation and removal of impurities with specific boiling points from the PEG solution, facilitating precise collection of single impurities and subsequent classification of different impurities, thus improving the quality of PEG purification. Furthermore, it further reduces energy consumption.
[0037] It should be noted that the first heat source 7 and the second heat source 71 in this embodiment can adopt any of the existing methods for heating polyethylene glycol, such as oil bath heating, water bath heating or electric heating tube heating.
[0038] It should be noted that the condenser 8 is any existing structure capable of cold condensing ethylene glycol, therefore, the condenser 8 and its structure will not be described in detail.
[0039] It should be noted that, in this embodiment of the present disclosure, the pressure inside the vessel 1 can be gradually reduced by an external vacuum pump before purification begins.
[0040] The second heat source 71 is spirally fixed around the outer surface of the first feed pipe 31, the first conveying pipe 41, and / or the second conveying pipe 42. The spirally fixed second heat source 71 can heat in all directions and improve the uniformity of heating, reduce the temperature gradient in the first feed pipe 31, the first conveying pipe 41, and / or the second conveying pipe 42, reduce the thermal stress caused by temperature differences, and make installation simpler, faster, and easier to maintain.
[0041] The ends of the first feed pipe 31, the first conveying pipe 41, and / or the second conveying pipe 42 are detachably fitted with adsorbents 9 that adsorb internal impurities during the conveying of polyethylene glycol. The adsorbents 9 are one or more of the following materials in the prior art: diatomaceous earth, activated alumina, molecular sieve, activated carbon, and ion exchange resin. This allows them to adsorb impurities in the polyethylene glycol during the conveying process, further improving the purification effect of the polyethylene glycol.
[0042] The second feed pipe 42 has ramps at both ends, and the first feed pipe 41 also has a ramp structure. The ramp structure of the first and second input channels facilitates the flow and transport of polyethylene glycol (PEG) during transport, preventing PEG residue during transport and thus helping to maintain the integrity of PEG during purification and transport.
[0043] The lower sides of the first isolation plate 3 and the second isolation plate 4 have a ramp structure, and the first output pipe 6 is located below the horizontal level of the lower side of the first isolation plate 3 or the second isolation plate 4. The ramp structure of the first isolation plate 3 and the second isolation plate 4 can guide the steam, thereby avoiding disorderly diffusion of steam and reducing the effect of accurate collection of various impurities in polyethylene glycol. The upper side of the second isolation plate 4 has a conical structure, which can gather the polyethylene glycol and transport it through the second feed pipe 42, thereby avoiding the residue of polyethylene glycol during the purification process.
[0044] During the polyethylene glycol (PEG) purification process, PEG is first fed into the main inlet pipe 5, then into the first feed pipe 31 and finally into the purification chamber 2 via the first feed pipe 41. There, it is distilled by the lowest-temperature first heat source 7, causing the lowest-boiling-point impurities to be distilled and the vapor to enter the first outlet pipe 6 and be discharged to the condenser 8 for condensation and collection. For example, the first heat source 7 has a heating temperature of 56.05°C, thereby evaporating acetone from the PEG into vapor in the lowest-temperature purification chamber 2. The acetone vapor is then guided by the bottom-inclined first isolation plate 3 or second isolation plate 4 and discharged through the first outlet pipe 6 to the condenser 8 for condensation and collection.
[0045] Then, the solenoid valve 411 in the second feed pipe 42 is opened, allowing polyethylene glycol, which has distilled out the lowest boiling point impurities at the lowest temperature, to enter the first feed pipe 41 through the second feed pipe 42. This allows it to enter the adjacent purification chamber 2, where the polyethylene glycol is distilled by the first heat source 7, which increases in temperature. The distilled impurity vapor is guided by the lower inclined first partition plate 3 or second partition plate 4 into the first output pipe 6, thus discharging the impurities with increasing boiling points from the polyethylene glycol. For example, the temperature of the second heat source 71, which increases in temperature, is 78.37°C. After discharging acetone, the ethanol is reheated to evaporate, forming vapor. The ethanol vapor is then guided by the lower inclined first partition plate 3 or second partition plate 4 and discharged through the first output pipe 6 to the condenser 8 for condensation and collection.
[0046] After removing impurities with increasing boiling points from polyethylene glycol, the solenoid valve 411 in the second feed pipe 42 of the current purification chamber 2 is opened, allowing polyethylene glycol to re-enter the adjacent purification chamber 2 through the second feed pipe 42 and the first feed pipe 41 for distillation. This process is repeated, enabling operators to collect the condensed liquid in the condenser 8 at regular intervals, thus achieving precise collection of single impurities in polyethylene glycol and facilitating subsequent classification and processing of different impurities.
[0047] When polyethylene glycol is transported to the purification chamber 2 at the highest temperature, it undergoes distillation and vapor removal by the first heat source 7, leaving only polyethylene glycol in the purification chamber 2, thus completing the purification of polyethylene glycol. After the purification of polyethylene glycol is completed, the polyethylene glycol solution is discharged to the outside for collection through the first feed pipe 41 and the second feed pipe 42 of the current purification chamber 2.
[0048] If polyethylene glycol contains impurities with a boiling point higher than polyethylene glycol, the polyethylene glycol is distilled in the purification chamber 2 at the highest distillation temperature. The vapor generated by the distillation of polyethylene glycol is guided by the lower inclined second isolation plate 4 and discharged through the conveying pipe to the condenser 8 for collection. Then, only impurities remain in the purification chamber 2, and the impurities are discharged through the first conveying pipe 41 and the second conveying pipe 42.
[0049] Meanwhile, during the transportation of polyethylene glycol in the first feed pipe 31, the first conveying pipe 41, and the second conveying pipe 42, the second heat source 71 can also gradually preheat the polyethylene glycol through its multi-segment structure with different temperatures along the conveying direction. This can reduce the heating time during polyethylene glycol distillation, thereby accelerating the distillation efficiency of polyethylene glycol. It can also make polyethylene glycol heat up uniformly, avoiding local overheating that would lead to inconsistent impurities after distillation, thus improving the effect of accurate collection of single impurities for subsequent classification and processing.
[0050] Simultaneously, during the transport of polyethylene glycol (PEG) through the first feed pipe 31, the first conveying pipe 41, and the second conveying pipe 42, the adsorbent 9 can directly adsorb impurities in the PEG, thereby removing impurities and improving the PEG purification efficiency. Furthermore, the inclined first and second input channels facilitate the flow and transport of PEG during transport, preventing residues and ensuring the integrity of the PEG during purification and transport.
[0051] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A polyethylene glycol purification device, comprising a vessel body (1) and partition plates, wherein at least one partition plate is fixedly installed at intervals within the vessel body (1), and a purification chamber (2) is formed between adjacent partition plates, characterized in that: The isolation plate includes a first isolation plate (3) and a second isolation plate (4). The first isolation plate (3) is fixedly installed on the uppermost or lowermost side of the vessel body (1). The second isolation plate (4) is fixedly installed on the side of the first isolation plate (3) that is farther away from the upper and lower ends of the vessel body (1). A main input pipe (5) is fixedly installed on the side wall of the vessel body (1) on the side of the first isolation plate (3) that is far away from the second isolation plate (4). A first feed pipe (31) connected to the main input pipe (5) is fixedly installed inside the first isolation plate (3). A first conveying pipe (41) connected to the first feed pipe (31) is fixedly installed on the side wall of the vessel body (1). The other end of the first conveying pipe (41) is connected to the purification chamber (2). A second conveying pipe (42) connected to the purification chamber (2) is fixedly installed inside the second isolation plate (4). A first heat source (7) with different heating temperatures is fixedly installed inside the purification chamber (2). A first output pipe (6) is fixedly installed inside the purification chamber (2).
2. The polyethylene glycol purification equipment according to claim 1, characterized in that: A second heat source (71) is fixedly installed on the outer surface of the first feed pipe (31), the first conveying pipe (41) and / or the second conveying pipe (42).
3. The polyethylene glycol purification equipment according to claim 2, characterized in that: The temperatures of the first heat source (7) and / or the second heat source (71) at different horizontal heights increase or decrease sequentially.
4. The polyethylene glycol purification equipment according to claim 3, characterized in that: Multiple second heat sources (71) at the same horizontal height are set in the horizontal direction, and the temperature of the multiple second heat sources (71) at the same horizontal height increases sequentially along the material conveying direction.
5. The polyethylene glycol purification equipment according to claim 4, characterized in that: The second heat source (71) is fixedly spirally around the outer surface of the first feed pipe (31), the first conveying pipe (41) and / or the second conveying pipe (42).
6. The polyethylene glycol purification equipment according to claim 5, characterized in that: The ends of the first feed pipe (31), the first conveying pipe (41) and / or the second conveying pipe (42) are fitted with detachable adsorbents (9).
7. The polyethylene glycol purification equipment according to claim 6, characterized in that: The first conveying pipe (41) has ramps at both ends, and the second conveying pipe (42) has ramps.
8. The polyethylene glycol purification equipment according to claim 7, characterized in that: The lower side of the first isolation plate (3) and / or the second isolation plate (4) has a ramp structure, and the first output pipe (6) is located below the horizontal height of the lower side of the first isolation plate (3) or the second isolation plate (4).