Rectifying tower for preparing phenyl polytrimethylsiloxane

Abstract

The utility model belongs to the technical field of preparation of phenyl polytrimethylsiloxane, and particularly relates to a rectifying tower for preparing phenyl polytrimethylsiloxane. A rectifying tower for preparing phenyl polytrimethylsiloxane comprises a rectifying tower body, and a heater is arranged on the outer wall of the rectifying tower body; the inner circulating pipe is spirally arranged on the outer wall of the rectifying tower; the mounting cover is arranged on the inner circulating pipe in a sleeving manner; the heater is arranged on the mounting cover; one side, far away from the heater, of the cooler is arranged on the mounting cover; the condensation reflux assembly is arranged at the top of the rectifying tower; and the reheating assembly is arranged at the bottom of the rectifying tower. The rectifying tower is preheated in advance when hot steam enters the rectifying tower, so that the hot steam is prevented from being influenced by the temperature of the rectifying tower when entering the rectifying tower. The temperature is maintained; and meanwhile, the loss in the process is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of phenyl polytrimethyl siloxane preparation, especially relates to a phenyl polytrimethyl siloxane preparation is used rectifying column. BACKGROUND

[0002] Rectification is one of the most commonly used methods for separating liquid mixtures in chemical production, and the separation between substances is achieved through multiple gas-liquid contact. The traditional rectifying tower design is relatively single, usually only considering improving a single performance parameter (such as reflux ratio, theoretical plate number, etc.), while ignoring the overall energy efficiency optimization. In recent years, with the rise of energy costs and the strengthening of environmental awareness, how to improve the rectification efficiency and reduce the energy consumption has become a research hotspot. Although there are various types of rectifying towers on the market, they generally have problems such as complex structure, high maintenance cost, poor adaptability, etc. In order to cope with the above challenges, the industry has proposed various improvement measures and technical means. For example, increase internal components to improve mass transfer effect, such as setting corrugated plates, sieve plates, etc. Form of tray; use high-efficiency packing to replace traditional packing to improve separation efficiency; introduce new heat integration technology to reduce external heating demand. However, these methods can only solve the problem locally and are difficult to fully consider the needs of energy saving and consumption reduction and production capacity improvement. In addition, some improvement measures may increase the cost and operation difficulty of the equipment, thereby reducing the economic benefits. Although the above methods improve the working performance of the rectifying tower to some extent, there are still obvious deficiencies. First, most of the improvement schemes focus on performance optimization under specific working conditions, lack of universality and flexibility; second, in the pursuit of high efficiency, the stability and reliability of the system are often sacrificed; finally, due to the increase in structural complexity, the later operation and maintenance are more difficult, thereby increasing the total operating cost.

[0003] The Chinese patent with publication number CN219023276U discloses a device for preparing silane, a movable cavity is formed at the middle position inside the rectifying tower shell, a plurality of evenly distributed heating stators are integrally formed on the inner side walls of the movable cavity, limit sliding rails are installed on the upper and lower sides of the inner side walls of the movable cavity, a sliding plate is slidably connected inside the limit sliding rails, the sliding plate is driven to slide inside the limit sliding rails by the driving assembly, and a plurality of evenly distributed heating rotors are installed on the upper surface of the sliding plate. The heating rotors on the sliding plate rotate under the drive of the driving motor to stir the liquid inside the movable cavity, heat is generated during the mutual collision of the liquid between the heating rotors and the heating stators, the temperature rises, the liquid with a higher temperature is transmitted to the inside of the communication cavity, and the heat inside the communication cavity can be transferred to the liquid phase after the heat exchange operation caused by the temperature difference between the gas phase and the liquid phase, thereby improving the rectification efficiency, preventing the internal temperature of the rectifying tower body from dissipating outward, and having a heat preservation effect on the inside of the rectifying tower body. However, the device generates heat and maintains heat through friction, which may cause loss during production. The utility model discloses a content

[0004] The utility model discloses a content to the technical problem of above -mentioned, provide a kind of rectifying column for preparing phenyl polytrimethylsiloxane, heat and maintain heat to rectifying column, reach the effect of reducing friction loss.

[0005] Therefore, the utility model provides a kind of rectifying column for preparing phenyl polytrimethylsiloxane, comprising: rectifying column, the heater is arranged on the outer wall of rectifying column;The inner circulation pipe is spirally arranged on the outer wall of rectifying column;The mounting cover is sleeved on the inner circulation pipe;The heater is arranged on the mounting cover;The cooler is arranged on the mounting cover away from the side of heater;The condensation reflux component is arranged on the top of rectifying column;The reheating component is arranged on the bottom of rectifying column.

[0006] In the technical solution, when hot steam is to be added to the rectifying column, the heater heats the temperature exchange medium of the inner circulation pipe, and the temperature of the temperature exchange medium is the same as that of the hot steam.If the temperature of the hot steam decreases, the cooler cools the temperature medium of the inner circulation pipe, and when the temperature of the temperature medium is the same as that of the hot steam, the heater starts to work to play a heat preservation role.When the hot steam enters the rectifying column, the rectifying column is preheated in advance, so that the hot steam is not affected by the temperature of the rectifying column itself when entering the rectifying column.The temperature is maintained while avoiding loss in the process.

[0007] In the above technical solution, further, the inner circulation pipe bottom is connected with inflow unit, the inflow unit provides temperature medium in the inner circulation pipe, the inner circulation pipe bottom is connected with outflow unit, and the outflow unit recycles temperature medium in the inner circulation pipe.

[0008] In the technical solution, the inflow unit transports the temperature exchange medium in the heater or the cooler to the inner circulation pipe, and the outflow unit transports the temperature exchange medium in the inner circulation pipe to the heater or the cooler.The inflow unit and the outflow unit circulate the temperature exchange medium in the heater or the cooler and the inner circulation pipe, and control the temperature in the rectifying pipe.

[0009] In the above technical solution, further, the inflow unit includes inflow pipe, the inflow pipe is connected with first three-way pipe, one end of the first three-way pipe is connected with first flow pipe, and the other end is connected with second flow pipe, the first flow pipe is connected to the bottom of the heater, and the second flow pipe is connected to the bottom of the cooler.

[0010] In the above technical solution, further, the outflow unit comprises an outflow pipe, the outflow pipe is connected with a second three-way pipe, one end of the second three-way pipe is connected with a third flow pipe, the other end of the second three-way pipe is connected with a fourth flow pipe, the third flow pipe is connected to the top of the heater, and the fourth flow pipe is connected to the top of the cooler.

[0011] In the present technical solution, the heater or the cooler adjusts the temperature exchange medium to enter the inner circulation pipe from the inflow pipe for temperature exchange, and after the temperature exchange, the temperature exchange medium returns to the heater or the cooler for adjustment, so as to form a circulation.

[0012] In the above technical solution, further, the condensation reflux assembly comprises a steam recovery pipe, the steam recovery pipe is fixedly arranged at the top of the rectifying tower, the steam recovery pipe is linearly arranged with a plurality of straight pipes along the length direction, the straight pipes are vertically connected to a condensation separator downward, one end of the condensation separator is provided with a first reflux pipe, and the other end of the condensation separator is provided with a first collection pipe, and the first reflux pipe is connected to the rectifying tower.

[0013] In the present technical solution, the hot steam carrying the required chemical materials enters the straight pipes along the steam reflux pipe, a plurality of straight pipes are arranged to enable the hot steam carrying the required chemical materials to enter the condensation separator, the condensation separator cools the hot steam and the hot steam carrying the required chemical materials into liquid, and separates them through a chemical reaction, the chemical materials enter the collection cylinder through the first collection pipe, and the water returns to the rectifying tower. The condensation separator is a known technology and will not be described in detail.

[0014] In the above technical solution, further, the reheating assembly comprises a second collection pipe, one end of the second collection pipe is connected to the bottom of the rectifying tower, and the other end of the second collection pipe is connected to the bottom of the reheater, and the reheater is provided with a second reflux pipe on one side and connected to the rectifying tower.

[0015] In the present technical solution, the material and water mixed flow to the bottom layer of the rectifying tower, enter the reheater through the second collection pipe, the reheater heats the water into hot steam, and the steam returns to the rectifying tower through the second reflux pipe, so as to reduce resource waste and improve the effect of rectification.

[0016] In the above technical solution, further, a first feeding port is arranged in the middle of the rectifying tower, a second feeding port is arranged at the top of the rectifying tower, and a steam pipe is arranged at the bottom of the rectifying tower.

[0017] In the present technical solution, the rectifying tower is sleeved with an inner circulation pipe for heating and heat preservation, when the material is rectified, the material is first added from the first feeding port, and when the temperature in the rectifying tower is constant, the material is added from the second feeding port, so as to avoid that the temperature of the material affects the effect of rectification.

[0018] In the above technical solution, further comprising a temporary flow storage pipe, the bottom of the temporary flow storage pipe is connected to the first three-way pipe, the top of the temporary flow storage pipe is connected to the second three-way pipe, and the temporary flow storage pipe is arranged in a serpentine shape along the vertical direction.

[0019] In the technical solution, under the action of the heater and the cooler, the temperature exchange medium expands and contracts with temperature change, and the volume may change. The temporary flow storage pipe stores excess temperature exchange medium and provides excess temperature exchange medium to balance the internal pressure, thereby avoiding explosion caused by different internal and external pressures. The serpentine arrangement of the temporary flow storage pipe better stores the temperature exchange medium.

[0020] The beneficial effects of the utility model are as follows:

[0021] 1. By setting the inner circulation pipe, the inlet flow unit and the outlet flow unit, the temperature exchange medium in the heater or the cooler and the inner circulation pipe is circulated, and the temperature in the rectification pipe is better controlled.

[0022] 2. By setting the heater and the cooler, the heater or the cooler adjusts the temperature exchange medium entering the inner circulation pipe from the inlet pipe for temperature exchange. After the temperature exchange, the temperature exchange medium returns to the heater or the cooler from the outlet pipe for adjustment, so as to form a cycle.

[0023] 3. By setting the temporary flow storage pipe, explosion caused by different internal and external pressures is avoided. The serpentine arrangement of the temporary flow storage pipe better stores the temperature exchange medium. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic view of the utility model;

[0025] Figure 2 is a sectional view structural schematic view;

[0026] Figure 3 is a pipeline connection schematic view.

[0027] The marks in the figure represent:

[0028] 1, rectification tower; 2, mounting cover; 3, heater; 4, cooler; 5, condensation reflux assembly; 6, temporary flow storage pipe; 7, reheating assembly; 8, first feed inlet; 9, second feed inlet; 10, steam pipe; 11, inner circulation pipe; 12, first three-way pipe; 13, second three-way pipe; 14, first flow pipe; 15, second flow pipe; 16, third flow pipe; 17, fourth flow pipe; 501, steam recovery pipe; 502, straight flow pipe; 503, condensation separator; 504, first reflux pipe; 505, first collection pipe; 701, second collection pipe; 703, reheater; 704, second reflux pipe. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. The techniques, methods and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so further discussion is not needed in subsequent drawings once an item is defined in one drawing.

[0031] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not intended to describe a specific order or sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0032] It should be noted that in the description of the present application, the orientation terms such as "front, rear, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and in the absence of contrary indications, these orientation terms do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation terms "inner, outer" refer to the inner and outer relative to the contour of each component.

[0033] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0034] Example 1:

[0035] This embodiment provides a distillation column 1 for the preparation of phenyl polytrimethylsiloxane. Figure 1 As shown, the system includes: a distillation column 1, with a heater 3 installed on its outer wall; an inner circulation pipe 11, which is coiled on the outer wall of the distillation column 1; a mounting cover 2, which is fitted over the inner circulation pipe 11; the heater 3, which is mounted on the mounting cover 2; a cooler 4, which is mounted on the mounting cover 2 on the side away from the heater 3; a condensation reflux assembly 5, which is located at the top of the distillation column 1; and a reheat assembly 7, which is located at the bottom of the distillation column 1. When hot steam is added to the distillation column, the heater 3 heats the temperature exchange medium in the inner circulation pipe 11 to the same temperature as the hot steam. If the temperature of the hot steam decreases, the cooler 4 cools the temperature medium in the inner circulation pipe 11. When the temperature medium drops to the same temperature as the hot steam, the heater 3 starts to work to maintain the temperature. Preheating distillation column 1 before hot steam enters it prevents the steam from being affected by the column's own temperature. This maintains the temperature and avoids losses during the process.

[0036] like Figure 3As shown, an inlet unit is connected to the bottom of the inner circulation pipe 11, which provides the temperature medium within the inner circulation pipe 11. An outlet unit is also connected to the bottom of the inner circulation pipe 11, which recovers the temperature medium from within the inner circulation pipe 11. The inlet unit transports the temperature exchange medium from the heater 3 or cooler 4 into the inner circulation pipe 11, and the outlet unit transports the temperature exchange medium from the inner circulation pipe 11 back to the heater 3 or cooler 4. The inlet and outlet units circulate the temperature exchange medium between the heater 3 or cooler 4 and the inner circulation pipe 11, thus better controlling the temperature within the distillation tube.

[0037] like Figure 3 As shown, the inlet unit includes an inlet pipe connected to a first tee pipe 12. One end of the first tee pipe 12 is connected to a first flow pipe 14, and the other end is connected to a second flow pipe 15. The first flow pipe 14 is connected to the bottom of the heater 3, and the second flow pipe 15 is connected to the bottom of the cooler 4. The outlet unit includes an outlet pipe connected to a second tee pipe 13. One end of the second tee pipe 13 is connected to a third flow pipe 16, and the other end is connected to a fourth flow pipe 17. The third flow pipe 16 is connected to the top of the heater 3, and the fourth flow pipe 17 is connected to the top of the cooler 4. After the heater 3 or cooler 4 is regulated, the temperature exchange medium enters the inner circulation pipe 11 through the inlet pipe for temperature exchange. After the exchange is completed, the temperature exchange medium returns to the heater 3 or cooler 4 through the outlet pipe for further regulation, thus forming a circulation.

[0038] like Figure 2 As shown, the condenser reflux assembly 5 includes a steam recovery pipe 501, which is fixedly installed at the top of the distillation column 1. A linear array of direct current pipes 502 are arranged along the length of the steam recovery pipe 501. The direct current pipes 502 are vertically connected downwards to a condenser separator 503. One end of the condenser separator 503 is provided with a first reflux pipe 504, and the other end is provided with a first collection pipe 505. The first reflux pipe 504 is connected to the distillation column 1. Hot steam carrying the required chemical material enters the direct current pipe 502 along the steam reflux pipe. Multiple direct current pipes 502 are arranged in a coordinated manner to ensure that the hot steam carrying the required chemical material enters the condenser separator 503. The condenser separator 503 cools the hot steam and the chemical material carried by the hot steam into a liquid, and separates them through a chemical reaction. The chemical material enters the collection cylinder through the first collection pipe 505, while the water flows back into the distillation column 1. The condenser separator 503 is existing known technology and will not be described in detail.

[0039] like Figure 2As shown, the reheat assembly 7 includes a second collecting pipe 701, one end of which is connected to the bottom of the distillation column 1, and the other end is connected to the bottom of the reheater 703. A second reflux pipe 704 is provided on one side of the reheater 703 and connected to the distillation column 1. The material and water mix and flow to the bottom of the distillation column 1, and enter the reheater 703 through the second collecting pipe 701. The reheater 703 heats the water into hot steam, and the steam returns to the distillation column 1 through the second reflux pipe 704, reducing resource waste and improving the distillation efficiency.

[0040] like Figure 2 As shown, a first feed inlet 8 is provided in the middle of the distillation column 1, a second feed inlet 9 is provided at the top of the distillation column 1, and a steam pipe 10 is provided at the bottom of the distillation column 1. An internal circulation pipe 11 is installed in the middle of the distillation column 1 for heating and insulation. When the material is being distilled, the material is first added through the first feed inlet 8. When the temperature inside the distillation column 1 is constant, the material is then added through the second feed inlet 9 to avoid the material temperature affecting the distillation effect.

[0041] like Figure 3 As shown, it includes a temporary storage pipe 6, the bottom of which is connected to a first tee pipe 12, and the top of which is connected to a second tee pipe 13. The temporary storage pipe 6 is arranged in a serpentine pattern along the vertical direction. Under the action of the heater 3 and the cooler 4, the temperature exchange medium expands and contracts with temperature changes, and its volume may change. The temporary storage pipe 6 stores excess temperature exchange medium and provides excess temperature exchange medium to balance the internal pressure, avoiding explosion caused by pressure differences between the inside and outside. The serpentine arrangement of the temporary storage pipe 6 better stores the temperature exchange medium.

[0042] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A phenyl trimethicones production rectification column (1), characterized in that , comprising: a rectifying tower (1), an outer wall of the rectifying tower (1) is provided with a heater (3); an inner circulation pipe (11) is spirally arranged on the outer wall of the rectifying tower (1); a mounting cover (2) is sleeved on the inner circulation pipe (11); the heater (3) is arranged on the mounting cover (2); a cooler (4) is arranged on the mounting cover (2) away from the heater (3); a condensation reflux assembly (5) is arranged on the top of the rectifying tower (1); a reheating assembly (7) is arranged at the bottom of the rectifying tower (1).

2. A phenyl trimethicones preparation rectifying column (1) according to claim 1, characterized in that, The bottom of the inner circulation pipe (11) is connected with an inflow unit, which provides temperature medium in the inner circulation pipe (11), and the bottom of the inner circulation pipe (11) is connected with an outflow unit, which recovers temperature medium in the inner circulation pipe (11).

3. A phenyl trimethicones preparation rectifying column (1) according to claim 2, characterized in that, The inflow unit comprises an inflow pipe, the inflow pipe is connected with a first three-way pipe (12), one end of the first three-way pipe (12) is connected with a first flow pipe (14), and the other end is connected with a second flow pipe (15), the first flow pipe (14) is connected to the bottom of the heater (3), and the second flow pipe (15) is connected to the bottom of the cooler (4).

4. A phenyl trimethicones preparation rectifying column (1) according to claim 2, characterized in that, The outflow unit comprises an outflow pipe, the outflow pipe is connected with a second three-way pipe (13), one end of the second three-way pipe (13) is connected with a third flow pipe (16), and the other end is connected with a fourth flow pipe (17), the third flow pipe (16) is connected to the top of the heater (3), and the fourth flow pipe (17) is connected to the top of the cooler (4).

5. A phenyl trimethicones preparation rectifying column (1) according to claim 1, characterized in that, The condensation reflux assembly (5) comprises a steam recovery pipe (501) fixedly arranged on the top of the rectifying tower (1), the steam recovery pipe (501) is linearly arranged with a straight pipe (502) along the length direction, the straight pipe (502) is vertically connected to a condensation separator (503) downward, the condensation separator (503) is provided with a first reflux pipe (504) at one end and a first collection pipe (505) at the other end, and the first reflux pipe (504) is connected to the rectifying tower (1).

6. A phenyl trimethicones preparation rectifying column (1) according to claim 1, characterized in that, The reheating assembly (7) comprises a second collection pipe (701), one end of the second collection pipe (701) is connected to the bottom of the rectifying tower (1), and the other end is connected to the bottom of a reheater (703), and the reheater (703) is provided with a second reflux pipe (704) connected to the rectifying tower (1) at one side.

7. A phenyl trimethicones preparation rectifying column (1) according to claim 1, characterized in that, A first feed inlet (8) is arranged in the middle of the rectifying tower (1), a second feed inlet (9) is arranged at the top of the rectifying tower (1), and a steam pipe (10) is arranged at the bottom of the rectifying tower (1).

8. A phenyl trimethicones preparation rectifying column (1) according to claim 3, characterized in that, It also comprises a temporary storage pipe (6), the bottom of the temporary storage pipe (6) is connected to the first three-way pipe (12), the top of the temporary storage pipe (6) is connected to the second three-way pipe (13), and the temporary storage pipe (6) is arranged in a zigzag shape along the vertical direction.

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