DMT mixture centrifugal equipment
By setting a combined structure of fixed plate and insulation material outside the drum of the horizontal centrifuge, the problem of poor insulation effect of the horizontal centrifuge is solved, and the heat loss and energy consumption are reduced.
Patent Information
- Application Number
- CN202422406392.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-09-30
AI Technical Summary
The existing horizontal centrifuge has poor insulation effect during the centrifuge of DMT mixture, resulting in serious heat loss and increasing the energy consumption of subsequent DMT distillation processes.
The insulation layer is provided outside the drum of the horizontal centrifuge. The insulation layer is composed of a fixing plate and an insulation material. The fixing plate is spliced through multiple daughter boards and fixedly connected to the drum through a connecting rod to prevent the insulation material from falling off when rotating at high speed.
It effectively reduces heat loss during centrifugation and reduces the energy consumption of subsequent DMT distillation processes.
Smart Images
Figure CN223221669U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of chemical fiber recycling, and in particular to a DMT mixture centrifugal device. Background Art
[0002] DMT is one of the important raw materials for synthesizing polyester and is also an important regeneration link in the chemical recycling process of waste textiles. The chemical recycling technology of waste textiles uses waste textiles as raw materials and undergoes processes such as glycol hydrolysis, impurity removal, ester exchange, centrifugation, and DMT distillation to synthesize and regenerate DMT (dimethyl terephthalate). Among them, the temperature of ester exchange is about 180-200°C, and the melting pot temperature during DMT distillation is 160-200°C. However, the existing centrifugation step mainly uses a horizontal centrifuge. The rotation speed of the horizontal centrifuge drum is relatively high, and traditional insulation materials cannot be directly wrapped on the surface, so its insulation effect is poor. The DMT mixture obtained by ester exchange will lose a lot of heat during the centrifugation process in the horizontal centrifuge, resulting in the need to consume a lot of heat to heat the DMT in the subsequent DMT distillation process, thereby affecting the energy consumption of DMT recovery. Utility Model Content
[0003] In view of the above problems, the present application provides a DMT mixture centrifugal device, which is used to solve the technical problems that the centrifugal device for centrifuging DMT mixture has poor thermal insulation effect and serious heat loss.
[0004] To achieve the above-mentioned object, the present application provides a DMT mixture centrifugal device for separating a mixture of ethylene glycol, methanol and DMT obtained after a lipid exchange reaction, the DMT mixture centrifugal device comprising: a horizontal centrifuge;
[0005] The horizontal centrifuge includes a drum and a rotating cylinder coaxially disposed within the drum; a feed port is provided at one end of the rotating cylinder for inputting the mixture; the drum and the rotating cylinder are driven by a driving device to rotate in the same direction at a differential speed, so that the DMT is deposited on the inner wall of the drum by centrifugal force; a screw feeder is provided on the outside of the rotating cylinder, adapted to the inner wall of the drum, for pushing the DMT to a solid phase discharge port;
[0006] An insulation layer is provided on the outside of the rotating drum, and the insulation layer includes a fixed plate arranged away from the rotating drum and an insulation material arranged on the fixed plate and close to the rotating drum relative to the fixed plate; the fixed plate includes multiple sub-plates, and each sub-plate is fixedly connected to the rotating drum by at least one connecting rod.
[0007] Furthermore, the sub-plate is a hexagonal plate structure or a square plate structure.
[0008] Furthermore, a mounting hole is provided on the surface of the sub-board and passes through the sub-board in the thickness direction.
[0009] Furthermore, the feed port is connected to a regulating valve for controlling the feed rate of the mixture.
[0010] Furthermore, the thermal insulation material includes glass wool, aerogel felt, aluminum silicate wool or rock wool.
[0011] Furthermore, the fixing plate is an aluminum plate, an aluminum alloy plate or a stainless steel plate.
[0012] Furthermore, a conical drying area is provided at the solid phase discharge end of the drum.
[0013] Different from the existing technology, the DMT mixture centrifugal equipment of the above technical solution is provided with an insulation layer on the outside of the drum. The insulation layer includes a fixed plate and insulation material. The insulation material is fixed to the surface of the drum through the fixed plate. The fixed plate is formed by splicing multiple sub-plates. Each sub-plate has at least one connecting rod fixedly connected to the drum, so that the fixed plate can overcome the centrifugal force generated by the high-speed rotation of the drum and prevent the insulation material from falling off the drum due to the centrifugal force.
[0014] The above-mentioned records related to the content of the utility model are only an overview of the technical solution of this application. In order to enable ordinary technicians in this field to understand the technical solution of this application more clearly, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purposes and other purposes, features and advantages of this application easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of this application and other related contents, and are not to be considered as limiting this application.
[0016] In the drawings of the specification:
[0017] Figure 1 This is an axial cross-sectional view of the DMT mixture centrifugal device according to a specific embodiment;
[0018] Figure 2 is a cross-sectional view of the drum surface and the insulation layer in a specific embodiment;
[0019] Figure 3 It is a structural schematic diagram of the thermal insulation layer described in the specific implementation method;
[0020] The reference numerals in the above drawings are described as follows:
[0021] 1. Rotating drum; 2. Rotating drum; 3. Screw feeder; 4. Insulation layer; 11. Straight barrel area; 12. Drying area; 13. Solid phase discharge port; 14. Liquid phase discharge port; 15. Input shaft; 16. Feed port;
[0022] 41. Fixing plate; 42. Insulation material; 411. Sub-plate; 412. Mounting hole; 413. Connecting rod; DETAILED DESCRIPTION
[0023] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.
[0024] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.
[0025] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.
[0026] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.
[0027] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.
[0028] Without further limitations, in this application, the words "include", "comprise", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.
[0029] In this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise specifically limited.
[0030] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.
[0031] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0032] See also Figures 1 to 3, this embodiment provides a DMT mixture centrifugal device. The DMT mixture centrifugal device is used to separate the mixture of ethylene glycol, methanol and DMT obtained after the lipid exchange reaction, and separate DMT therefrom. The DMT obtained by separation (dimethyl terephthalate) is then subjected to DMT distillation to obtain high-purity DMT. Wherein, the mixture of ethylene glycol, methanol and DMT is a mixture containing DMT obtained by alcoholysis, impurity removal and ester exchange of waste textiles in the chemical recycling process of waste textiles. The DMT mixture centrifugal device of this embodiment can effectively separate DMT from the mixture of ethylene glycol, methanol and DMT, and can reduce heat loss during the centrifugal separation process, thereby reducing energy consumption in the subsequent DMT distillation process.
[0033] like Figure 1 As shown, in this embodiment, the DMT mixture centrifugal equipment includes: a horizontal centrifuge (i.e. Figure 1 device shown).
[0034] The horizontal centrifuge includes a drum 2 and a drum 1 coaxially arranged inside the drum 2; a feed port 16 is provided at one end of the drum 1 for inputting the mixture; the drum 2 and the drum 1 are driven by a driving device to rotate in the same direction at a differential speed, so that the DMT is deposited on the inner wall of the drum 2 by the action of centrifugal force; a screw feeder 3 is provided on the outside of the drum 1 and is adapted to the inner wall of the drum 2 for pushing the DMT to the solid phase discharge port.
[0035] Drum 2 is a long, hollow tubular structure placed horizontally (i.e., mounted on a mounting base) with rotating bearings at each end. A pulley or gear is attached to one end of drum 2, connecting it to a drive device that drives the rotation of drum 2. The diameter of drum 1 is smaller than that of drum 2, and a cavity exists between drums 2 and 1, providing ample space for DMT deposition. Drum 1 is also a hollow cylindrical structure with uniformly distributed through-holes throughout its surface. During centrifugation, DMT is ejected through these holes toward drum 2 and deposited on its inner wall.
[0036] Among them, the feed port 16 provided at one end of the drum 1 of the horizontal centrifuge can be connected to the ester exchange equipment through a pipeline. After the ethylene glycol, methanol and DMT mixture generated after the ester exchange is fed into the drum 1 through the feed port 16, it is immediately thrown into the cavity of the drum 2 under the action of the centrifugal force generated by the high-speed rotation. The high-speed rotating drum 2 generates a strong centrifugal force, which throws the DMT particles with a density greater than that of ethylene glycol and methanol onto the inner wall of the drum 2 to form a DMT solid layer. Since ethylene glycol and methanol have a lower density and a smaller centrifugal force, a liquid layer is formed on the inside of the solid ring layer. Then, the speed difference between the screw feeder 3 and the drum 2 is used to slowly push the DMT in the solid ring layer to the conical end of the drum 2, and after passing through the drying area 12, the DMT is continuously discharged from the discharge port at the end of the drum 2; the liquid in the liquid ring layer is discharged to the outside of the drum 2 through the overflow hole by gravity to form a separated liquid. Figure 1 As shown, the solid phase discharge end of the drum 2 is provided with a conical drying zone 12, i.e. Figure 1 The right end of the middle drum 2 is the drying zone, and the left end of the drum 2 is the straight cylindrical zone. The inner diameter of the solid phase in the drying zone gradually decreases toward the discharge port, so the extrusion force of the screw feeder 3 on the DMT gradually increases, so that the residual ethylene glycol and methanol in the DMT are squeezed out and dried.
[0037] In this embodiment, an insulation layer 4 is provided on the outside of the drum 2, and the insulation layer 4 includes a fixed plate 41 arranged away from the drum 2 and an insulation material 42 arranged on the fixed plate 41 and close to the drum 2 relative to the fixed plate 41; the fixed plate 41 includes multiple sub-plates 411, and each sub-plate 411 is fixedly connected to the drum 2 by at least one connecting rod 413.
[0038] The fixing plate 41 is an aluminum plate, an aluminum alloy plate, or a stainless steel plate. To facilitate securing the fixing plate 41 to the surface of the rotating drum 2, in this embodiment, the fixing plate 41 is split into multiple sub-plates 411. These sub-plates 411 are assembled to form a large-area fixing plate 41, thereby covering most of the surface area of the rotating drum 2. The sub-plates 411 are hexagonal or square.
[0039] The connecting rod 413 may be a metal connecting rod 413, one end of which is welded or screwed to the surface of the drum 2, and the other end of the connecting rod 413 is fixedly connected to the sub-plate 411. The sub-plate 411 and the connecting rod 413 may be fixedly connected by screws, rivets, etc. Figure 2 and Figure 3As shown, in one embodiment, the surface of the sub-plate 411 is provided with mounting holes 412 extending through the thickness thereof. Fasteners such as screws and rivets pass through the mounting holes 412 and are fixedly connected to the top of the connecting rod 413, thereby securing the sub-plate 411 to the top of the connecting rod 413. The connecting rod 413 has a certain height, allowing a certain thickness of space between the sub-plate 411 and the rotating drum 2 to be filled with the insulation material 42. Specifically, the length of the connecting rod 413 can be 5-8 cm, meaning that the thickness of the insulation material 42 is approximately 5-8 cm. The insulation material 42 includes glass wool, aerogel felt, aluminum silicate wool, or rock wool.
[0040] In this embodiment, the DMT mixture centrifugal device is provided with an insulation layer 4 on the outside of the drum 2. The insulation layer 4 includes a fixing plate 41 and an insulation material 42. The insulation material 42 is fixed to the surface of the drum 2 through the fixing plate 41. The fixing plate 41 is formed by splicing a plurality of sub-plates 411. Each sub-plate 411 has at least one connecting rod 413 fixedly connected to the drum 2, so that the fixing plate 41 can overcome the centrifugal force generated by the high-speed rotation of the drum 1 and prevent the insulation material 42 from falling off the drum 2 due to the centrifugal force.
[0041] In one embodiment, to ensure continuous operation of the DMT mixture centrifugation apparatus, a regulating valve is connected to the feed port 16 to control the feed rate of the mixture. Illustratively, the regulating valve is a proportional solenoid valve that controls the feed flow rate of the feeder to 10 to 14.5 m³ / h. This ensures that the material feed rate into the horizontal centrifuge is not excessive, thereby preventing the centrifuge from clogging or overloading, which could cause the apparatus to stop operating.
[0042] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.
Claims
1. A DMT mixture centrifuge for separating a mixture of ethylene glycol, methanol and DMT obtained after a lipid exchange reaction, characterized in that: The DMT mixture centrifugal equipment includes: a horizontal centrifuge; The horizontal centrifuge includes a drum and a rotating cylinder coaxially disposed within the drum; a feed port is provided at one end of the rotating cylinder for inputting the mixture; the drum and the rotating cylinder are driven by a driving device to rotate in the same direction at a differential speed, so that the DMT is deposited on the inner wall of the drum by centrifugal force; a screw feeder is provided on the outside of the rotating cylinder, adapted to the inner wall of the drum, for pushing the DMT to a solid phase discharge port; An insulation layer is provided on the outside of the rotating drum, and the insulation layer includes a fixed plate arranged away from the rotating drum and an insulation material arranged on the fixed plate and close to the rotating drum relative to the fixed plate; the fixed plate includes multiple sub-plates, and each sub-plate is fixedly connected to the rotating drum by at least one connecting rod.
2. The DMT mixture centrifugal device according to claim 1, characterized in that The sub-plate is a hexagonal plate structure or a square plate structure.
3. The DMT mixture centrifugal device according to claim 1, characterized in that The surface of the sub-board is provided with a mounting hole penetrating along the thickness direction.
4. The DMT mixture centrifugal device according to claim 1, characterized in that The feed port is connected to a regulating valve for controlling the feed rate of the mixture.
5. The DMT mixture centrifugal device according to claim 1, characterized in that The thermal insulation material includes glass wool, aerogel felt, aluminum silicate wool or rock wool.
6. The DMT mixture centrifugal device according to claim 1, characterized in that The fixing plate is an aluminum plate, an aluminum alloy plate or a stainless steel plate.
7. The DMT mixture centrifugal device according to claim 1, characterized in that A conical drying area is provided at the solid phase discharge end of the rotary drum.