A water vapor compression based bisphenol f dephenolization system

Abstract

The utility model relates to a double phenol F phenol removal technical field especially, relates to a kind of double phenol F phenol removal system based on water vapor compression, including falling-film evaporator, heat exchanger, steam compressor, water vapor providing workshop and water vapor delivery pipe;The falling-film evaporator is opened feed inlet;Water vapor delivery pipe's gas outlet is intercommunicated with the gas inlet of falling-film evaporator;Falling-film evaporator is opened with first water vapor outlet and first phenol steam outlet;Heat exchanger is opened with water vapor inlet, first phenol steam inlet, phenol liquid outlet and second water vapor outlet;First water vapor outlet and water vapor inlet are interconnected by pipeline;Second water vapor outlet and the gas inlet of steam compressor are interconnected.The utility model proposes a kind of double phenol F phenol removal system based on water vapor compression, not only realizes the effective recycling of hot phenol steam latent heat, and it is favorable to reduce energy consumption and production cost.

Description

Technical Field

[0001] This utility model relates to the field of bisphenol F removal technology, and in particular to a bisphenol F removal system based on water vapor compression. Background Technology

[0002] Bisphenol F (BPF), chemically known as bis-(hydroxyphenyl)methane, is a chemical raw material with a similar chemical structure to bisphenol A (BPA) but with different substituents. It has been gradually developed and applied in the industrial field since the 1980s.

[0003] The synthesis of bisphenol F is mainly achieved through a condensation reaction between phenol and formaldehyde in the presence of an acidic catalyst (such as sulfuric acid or phosphoric acid). The main reaction equation is shown below:

[0004] Although bisphenol F was prepared in the laboratory as early as the 1970s, the reaction appears simple but its actual mechanism is complex, with numerous side reactions and a high tendency to generate phenolic resins. To suppress side reactions and increase the yield of bisphenol F, a large excess of phenol is usually required, with the phenol-formaldehyde molar ratio (i.e., the molar ratio of phenol to formaldehyde) often exceeding 10:1. When producing high-purity products, the phenol-formaldehyde molar ratio can even reach 20:1, resulting in the need to remove a large amount of unreacted phenol during subsequent purification.

[0005] Currently, in industry, a common method for removing excess phenol from crude bisphenol F (BF) product is a batch evaporator. This involves using two indirect heating methods: jacket heating and / or internal coil heating, to heat the crude BF product and evaporate the phenol to obtain a high-purity BF product. However, due to the large initial excess of phenol, this process is extremely energy-intensive. Furthermore, the phenol vapor generated during the removal process is typically absorbed by cooling water and directly discharged after condensation, failing to achieve effective recovery and resulting in low overall energy efficiency and high production costs. Utility Model Content

[0006] The purpose of this invention is to propose a bisphenol F dephenolization system based on water vapor compression. By improving the bisphenol F dephenolization system, the latent heat of hot phenol vapor is effectively recovered and utilized, thereby significantly reducing energy consumption and production costs, and overcoming the shortcomings of the prior art.

[0007] To achieve this objective, the present invention adopts the following technical solution: A bisphenol F dephenolization system based on water vapor compression includes a falling film evaporator, a heat exchanger, a steam compressor, a water vapor supply workshop, and a water vapor delivery pipe; the water vapor supply workshop is used to supply high-temperature and high-pressure water vapor. The falling film evaporator has an inlet for feeding crude bisphenol F; the outlet of the steam conveying pipe is connected to the inlet of the falling film evaporator, the steam conveying pipe is used to convey high-temperature and high-pressure steam to the falling film evaporator, and the falling film evaporator is used to separate the crude bisphenol F product to be purified into hot phenol vapor and first bisphenol F liquid. The falling film evaporator has a first water vapor outlet and a first phenol vapor outlet; the heat exchanger has a water vapor inlet, a first phenol vapor inlet, a phenol liquid outlet, and a second water vapor outlet; the first water vapor outlet and the water vapor inlet are connected to each other through a pipe, and the first phenol vapor outlet and the first phenol vapor inlet are connected to each other through a pipe; the heat exchanger is used to exchange heat between hot phenol vapor and low-temperature, low-pressure water vapor. The second steam outlet is connected to the inlet of the steam compressor, and the inlet of the steam conveying pipe is connected to the outlet of the steam compressor and the outlet of the steam supply workshop. A first valve is provided between the air inlet of the steam delivery pipe and the air outlet of the steam supply workshop. The first valve is used to open and close the air outlet of the steam supply workshop.

[0008] Furthermore, it also includes thin-film evaporators; The falling film evaporator is provided with a first liquid outlet; the thin film evaporator is provided with a heat transfer oil inlet, a first bisphenol F inlet and a second phenol vapor outlet, the first bisphenol F inlet and the first liquid outlet are interconnected, and the second phenol vapor outlet and the first phenol vapor inlet are interconnected. The heat transfer oil inlet is connected to the heat transfer oil supply source, and the thin film evaporator is used to separate the first bisphenol F liquid into phenol vapor and the second bisphenol F liquid.

[0009] Furthermore, it also includes a high-temperature heat transfer oil inlet pipe, which is connected between the heat transfer oil supply source and the thin-film evaporator; The high-temperature heat transfer oil inlet pipe is equipped with an oil supply switch valve, which is used to open and close the high-temperature heat transfer oil inlet pipe.

[0010] Furthermore, it also includes a feed pipe and a first bisphenol F liquid collection tank; The feed inlet of the feed pipe is connected to the first liquid outlet, and the discharge outlet of the feed pipe is connected to the first bisphenol F liquid inlet and the first bisphenol F liquid collection tank, respectively. A second valve is provided between the outlet of the conveying pipe and the first bisphenol F inlet. The second valve is used to adjust the inlet flow rate of the first bisphenol F inlet. A third valve is provided between the outlet of the conveying pipe and the first bisphenol F liquid collection tank. The third valve is used to adjust the liquid inflow of the first bisphenol F liquid collection tank.

[0011] Furthermore, it also includes an extruder; the thin film evaporator is provided with a second liquid outlet, the feed port of the extruder is connected to the second liquid outlet, and the extruder is used to convert the second bisphenol F liquid into bisphenol F solid.

[0012] Furthermore, it also includes a weighing and bagging machine, the inlet of which is connected to the outlet of the extruder.

[0013] Furthermore, it also includes phenol recovery tanks; The phenol liquid outlet is connected to the inlet of the phenol recovery tank via a pipeline; the phenol recovery tank is used to recover the phenol liquid.

[0014] Furthermore, it also includes a condenser; The phenol recovery tank has a third phenol vapor outlet and a phenol liquid inlet, and the third phenol vapor outlet, the condenser and the phenol liquid inlet are connected to each other in sequence through pipelines.

[0015] Furthermore, it also includes a circulating cooling water pipe, the circulating cooling water output end of which is connected to the circulating cooling water input end of the condenser 400; The circulating cooling water pipe is equipped with a circulating cooling water regulating valve, which is used to open and close the circulating cooling water pipe.

[0016] The technical solution provided by this utility model can include the following beneficial effects: 1. The bisphenol F dephenolization system includes a falling film evaporator, a heat exchanger, a steam compressor, a steam supply workshop, and steam delivery pipes. The inlet feeds crude bisphenol F into the falling film evaporator. Since the boiling point of bisphenol F in the crude bisphenol F product is generally greater than 250℃, while the boiling point of phenol is 182℃, the two boiling points differ significantly. Therefore, in the initial stage of system operation, high-temperature, high-pressure steam (i.e., live steam) supplied by the steam supply workshop is used to exchange heat with the crude bisphenol F product. This allows the phenol contained in the crude bisphenol F product to rapidly vaporize, thereby separating the crude bisphenol F product into first-stage bisphenol F liquid and hot phenol vapor, thus achieving preliminary separation of the crude bisphenol F product. Simultaneously, during the heat exchange process between the high-temperature, high-pressure steam (i.e., live steam) and the crude bisphenol F product, the high-temperature, high-pressure steam is converted into low-temperature, low-pressure steam.

[0017] 2. In this technical solution, low-temperature, low-pressure steam flows from the first steam outlet to the steam inlet through a pipeline, while hot phenol steam flows from the first phenol steam outlet to the first phenol steam inlet through a pipeline. In the heat exchanger, the hot phenol steam (hot fluid) exchanges heat with the low-temperature, low-pressure steam (cold fluid) generated during the phenol removal process, significantly increasing the temperature of the low-temperature, low-pressure steam and achieving preliminary heat recovery. The heated steam is then pressurized and heated by a steam compressor, transforming it into high-temperature, high-pressure steam, which replaces the external high-temperature, high-pressure steam for evaporating residual phenol in the crude bisphenol F product. Furthermore, during the heat exchange between the hot phenol steam (hot fluid) and the low-temperature, low-pressure steam (cold fluid) generated during the phenol removal process, the hot phenol steam condenses into liquid phenol, facilitating phenol recovery and the system's phenol removal process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a bisphenol F dephenolization system based on water vapor compression according to this utility model.

[0019] Figure 2 This is a partial structural schematic diagram of a bisphenol F dephenolization system based on water vapor compression according to this utility model.

[0020] The components include: a falling film evaporator 1, a feed inlet 11, a first steam outlet 12, a first phenol steam outlet 13, a first liquid outlet 14, a heat exchanger 2, a steam inlet 21, a first phenol steam inlet 22, a phenol liquid outlet 23, a second steam outlet 24, a steam compressor 3, a steam supply workshop 4, a steam conveying pipe 5, a thin film evaporator 6, a heat transfer oil inlet 61, a first bisphenol F liquid inlet 62, a second phenol steam outlet 63, a second liquid outlet 64, a conveying pipe 7, a first bisphenol F liquid collection tank 8, an extruder 9, a high-temperature heat transfer oil input pipe 100, a weighing and bagging machine 200, a phenol recovery tank 300, a third phenol steam outlet 3001, a phenol liquid inlet 3002, and a condenser 400. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] This technical solution provides a bisphenol F dephenolization system based on water vapor compression, including a falling film evaporator 1, a heat exchanger 2, a steam compressor 3, a water vapor supply workshop 4, and a water vapor delivery pipe 5; the water vapor supply workshop 4 is used to supply high-temperature and high-pressure water vapor; The falling film evaporator 1 is provided with a feed inlet 11 for feeding crude bisphenol F; the outlet of the steam conveying pipe 5 is connected to the inlet of the falling film evaporator 1, the steam conveying pipe is used to convey high temperature and high pressure steam to the falling film evaporator 1, and the falling film evaporator 1 is used to separate the crude bisphenol F product to be purified into hot phenol vapor and first bisphenol F liquid. The falling film evaporator 1 has a first water vapor outlet 12 and a first phenol vapor outlet 13; the heat exchanger 2 has a water vapor inlet 21, a first phenol vapor inlet 22, a phenol liquid outlet 23, and a second water vapor outlet 24; the first water vapor outlet 12 and the water vapor inlet 21 are connected to each other through a pipe, and the first phenol vapor outlet 13 and the first phenol vapor inlet 22 are connected to each other through a pipe, and the heat exchanger 2 is used to exchange heat between hot phenol vapor and low-temperature, low-pressure water vapor. The second steam outlet 24 is connected to the air inlet of the steam compressor 3, and the air inlet of the steam conveying pipe 5 is connected to the air outlet of the steam compressor 3 and the air outlet of the steam supply workshop 4. A first valve is provided between the air inlet of the steam conveying pipe 5 and the air outlet of the steam supply workshop 4. The first valve is used to open and close the air outlet of the steam supply workshop 4.

[0023] To address the high energy consumption and inability to recover the latent heat of phenol vapor in the removal process of crude bisphenol F in existing technologies, leading to high production costs, this technical solution proposes a bisphenol F removal system based on steam compression, such as... Figure 1-2 As shown, this system exchanges heat between the hot phenol vapor (hot fluid) generated during the phenol removal process and the low-temperature, low-pressure water vapor (cold fluid) generated during the same process in a heat exchanger. This significantly increases the temperature of the low-temperature, low-pressure water vapor, achieving initial heat recovery. The heated water vapor is then pressurized and heated by a steam compressor, transforming it into high-temperature, high-pressure water vapor. This high-temperature, high-pressure water vapor replaces external high-temperature, high-pressure water vapor used to evaporate the residual phenol in the crude bisphenol F product. This effectively recovers and utilizes the latent heat of the hot phenol vapor, significantly reducing energy consumption and production costs.

[0024] Specifically, the bisphenol F dephenolization system includes a falling film evaporator 1, a heat exchanger 2, a steam compressor 3, a steam supply workshop 4, and a steam delivery pipe 5. The feed inlet 11 feeds crude bisphenol F into the falling film evaporator 1. Since the boiling point of bisphenol F in the crude bisphenol F product is generally greater than 250℃, while the boiling point of phenol is 182℃, the two boiling points differ significantly. Therefore, in the initial stage of system operation, high-temperature, high-pressure steam (i.e., live steam) provided by the steam supply workshop 4 exchanges heat with the crude bisphenol F product, causing the phenol contained in the crude bisphenol F product to rapidly vaporize, thereby separating the crude bisphenol F product into first bisphenol F liquid and hot phenol vapor, thus achieving preliminary separation of the crude bisphenol F product. Simultaneously, during the heat exchange process of the high-temperature, high-pressure steam (i.e., live steam) with the crude bisphenol F product, the high-temperature, high-pressure steam is converted into low-temperature, low-pressure steam.

[0025] Furthermore, the falling film evaporator 1 has a first steam outlet 12 and a first phenol vapor outlet 13; the heat exchanger 2 has a steam inlet 21, a first phenol vapor inlet 22, a phenol liquid outlet 23, and a second steam outlet 24. The first steam outlet 12 and the steam inlet 21 are interconnected by a pipe; the first phenol vapor outlet 13 and the first phenol vapor inlet 22 are interconnected by a pipe. In this technical solution, low-temperature, low-pressure steam flows from the first steam outlet 12 to the steam inlet 21 through a pipe, and hot phenol vapor flows from the first phenol vapor outlet 13 to the first phenol vapor inlet 22 through a pipe. In the heat exchanger 2, the hot phenol vapor (hot fluid) exchanges heat with the low-temperature, low-pressure steam (cold fluid) generated during the phenol removal process, significantly increasing the temperature of the low-temperature, low-pressure steam and achieving preliminary heat recovery. The heated steam is then pressurized and heated by the steam compressor 3, converting it into high-temperature, high-pressure steam, which replaces the external high-temperature, high-pressure steam for evaporating the residual phenol in the crude bisphenol F product. In addition, during the heat exchange between the hot phenol vapor (hot fluid) and the low-temperature, low-pressure water vapor (cold fluid) generated during the dephenolization process, the hot phenol vapor condenses into phenol liquid, which facilitates phenol recovery and system dephenolization.

[0026] The operating principle of this technical solution is as follows: In the initial stage of system operation, the first valve is opened, allowing high-temperature, high-pressure steam supplied by the steam supply workshop 4 to enter the falling film evaporator 1 through the steam delivery pipe 5. This steam exchanges heat with the crude bisphenol F product in the falling film evaporator 1, causing the phenol contained in the crude bisphenol F product to rapidly vaporize, thereby separating the crude bisphenol F product into first bisphenol F liquid and hot phenol vapor. Simultaneously, during the heat exchange process between the high-temperature, high-pressure steam (i.e., live steam) and the crude bisphenol F product, the high-temperature, high-pressure steam is converted into low-temperature, low-pressure steam. Then, utilizing the pressure difference between the inside of the falling film evaporator 1 and the inlet of the heat exchanger 2, the low-temperature, low-pressure steam flows through a pipe from the first steam outlet 12 to the steam inlet 21 of the heat exchanger 2; the hot phenol vapor flows through a pipe from the first phenol vapor outlet 13 to the first phenol vapor inlet 22 of the heat exchanger 2. Subsequently, in heat exchanger 2, hot phenol vapor (hot fluid) exchanges heat with low-temperature, low-pressure water vapor (cold fluid) generated during the phenol removal process. The hot phenol vapor condenses into liquid phenol and is discharged from the liquid phenol outlet 23. The low-temperature, low-pressure water vapor is heated by the hot phenol vapor to obtain heated water vapor, achieving preliminary heat recovery. Utilizing the pressure difference between the inside of heat exchanger 2 and the inlet of steam compressor 3, the heated water vapor automatically flows to steam compressor 3. Steam compressor 3 pressurizes and heats the heated water vapor, converting it into high-temperature, high-pressure water vapor. After steam compressor 2 stabilizes, the first valve is closed, stopping the supply of high-temperature, high-pressure water vapor to workshop 4. Then, the high-temperature, high-pressure water vapor obtained after being pressurized and heated by steam compressor is input into falling film evaporator 1 through water vapor delivery pipe 5 and exchanges heat with the crude bisphenol F product, thereby achieving the separation and purification of the crude bisphenol F product.

[0027] In summary, this technical solution only requires steam supply workshop 4 to provide high-temperature, high-pressure steam during the initial operation phase. A heat exchanger facilitates heat exchange between the hot phenol vapor (hot fluid) generated during the phenol removal process and the low-temperature, low-pressure steam (cold fluid) generated during the same process. The hot phenol vapor significantly raises the temperature of the low-temperature, low-pressure steam, resulting in heated steam. Subsequently, the quality of the heated steam is improved through compression before it is reused as a heat source. This constructs a high-efficiency separation system with low energy consumption and low operating costs, effectively recovering and utilizing the latent heat of the hot phenol vapor.

[0028] It should be noted that the terms "high-temperature, high-pressure steam" and "low-temperature, low-pressure steam" in this technical solution are relative. Specifically, the high-temperature, high-pressure steam has a temperature of 160-170℃ and a pressure of 6-8 kg / cm³. 2 Low-temperature, low-pressure water vapor has a temperature of 130-140℃ and a pressure of 2.7-3.6 kg / cm³. 2 Furthermore, all of the above parameters are standard parameters within the field.

[0029] Further explanation includes a thin-film evaporator 6; The falling film evaporator 1 is provided with a first liquid outlet 14; the thin film evaporator 6 is provided with a heat transfer oil inlet 61, a first bisphenol F inlet 62 and a second phenol vapor outlet 63, the first bisphenol F inlet 62 and the first liquid outlet 14 are interconnected, and the second phenol vapor outlet 63 is interconnected with the first phenol vapor inlet 22. The heat transfer oil inlet 61 is connected to the heat transfer oil supply source and is interconnected. The thin film evaporator 6 is used to separate the first bisphenol F liquid into phenol vapor and the second bisphenol F liquid.

[0030] This technical solution uses a thin-film evaporator 6 and high-temperature heat transfer oil supplied to the thin-film evaporator 6 to further separate and purify the first bisphenol F liquid. The phenol vapor generated during the separation process is discharged through the second phenol vapor outlet 63, which helps to improve the obtained bisphenol F liquid and meet the requirements for higher purity of bisphenol F liquid.

[0031] Further explanation: It also includes a high-temperature heat transfer oil inlet pipe 100, which is connected between the heat transfer oil supply and the thin-film evaporator 6; The high-temperature heat transfer oil inlet pipe 100 is equipped with an oil supply switch valve, which is used to open and close the high-temperature heat transfer oil inlet pipe 100.

[0032] This technical solution involves setting up a high-temperature heat transfer oil inlet pipe 100. During system operation, the high-temperature heat transfer oil inlet pipe 100 is used to transport high-temperature heat transfer oil to the thin-film evaporator 6. The high-temperature heat transfer oil heats the first bisphenol F liquid, thereby separating the first bisphenol F liquid into phenol vapor and the second bisphenol F liquid, which is beneficial for further separation and purification of the first bisphenol F liquid.

[0033] Further explanation includes the feed pipe 7 and the first bisphenol F liquid collection tank 8; The feed inlet of the feed pipe 7 is connected to the first liquid outlet 14, and the discharge outlet of the feed pipe 7 is connected to the first bisphenol F liquid inlet 62 and the first bisphenol F liquid collection tank 8, respectively. A second valve is provided between the outlet of the conveying pipe 7 and the first bisphenol F inlet 62. The second valve is used to adjust the inlet volume of the first bisphenol F inlet 62. A third valve is provided between the outlet of the conveying pipe 7 and the first bisphenol F liquid collection tank 8. The third valve is used to adjust the liquid inflow of the first bisphenol F liquid collection tank 8.

[0034] This technical solution, by setting up a feed pipe 7 and a first bisphenol F liquid collection tank 8, allows for further separation and purification of the first bisphenol F liquid by opening the second valve and closing the third valve when further separation and purification is required, using the thin-film evaporator 6; and for the recovery of the first bisphenol F liquid by closing the second valve and opening the third valve, using the first bisphenol F liquid collection tank 8 to recover the first bisphenol F liquid, thereby increasing the flexibility of the system.

[0035] Further explanation includes an extruder 9; the thin-film evaporator 6 is provided with a second liquid outlet 64, the feed inlet of the extruder 9 is connected to the second liquid outlet 64, and the extruder 9 is used to convert the second bisphenol F liquid into bisphenol F solid.

[0036] This technical solution involves setting up an extruder 9, in which the second bisphenol F liquid flows towards and is cooled. The extruder 9 then granulates the cooled second bisphenol F liquid to obtain bisphenol F solid, which improves the storage convenience of bisphenol F liquid.

[0037] To further explain, it also includes a weighing and bagging machine 200, the inlet of which is connected to the outlet of the extruder 9.

[0038] This technical solution uses a weighing and bagging machine 200 to collect and weigh bisphenol F solids, which not only provides a centralized collection point for bisphenol F solids, but also facilitates the packaging of bisphenol F solids according to actual needs.

[0039] Further explanation includes a phenol recovery tank 300; The phenol liquid outlet 23 is connected to the inlet of the phenol recovery tank 300 via a pipeline; the phenol recovery tank 300 is used to recover phenol liquid.

[0040] This application provides a phenol recovery tank 300 to recover the phenol liquid output from the phenol liquid outlet 23, thereby improving the raw material recovery rate.

[0041] Further explanation includes the condenser 400; The phenol recovery tank 300 has a third phenol vapor outlet 3001 and a phenol liquid inlet 3002. The third phenol vapor outlet 3001, the condenser 400 and the phenol liquid inlet 3002 are connected to each other in sequence through pipelines.

[0042] After the hot phenol vapor (hot fluid) exchanges heat with the low-temperature, low-pressure water vapor (cold fluid) generated during the phenol removal process, the resulting phenol liquid still has pressure and a relatively high temperature. When it is discharged from the phenol liquid outlet 23 to the phenol recovery tank 300, there will be a flash evaporation effect, resulting in a small amount of phenol vapor. Therefore, this application includes a condenser 400 to condense the phenol vapor generated by flash evaporation and recover it to the phenol recovery tank 300, thereby improving the raw material recovery rate.

[0043] To further explain, it also includes a circulating cooling water pipe, wherein the circulating cooling water output end of the circulating cooling water pipe is connected to the circulating cooling water input end of the condenser 400; The circulating cooling water pipe is equipped with a circulating cooling water regulating valve, which is used to open and close the circulating cooling water pipe.

[0044] This technical solution uses circulating cooling water pipes (not shown in the figure) to make the condenser 400 use circulating cooling water as a cold source, so that the phenol vapor generated by flash evaporation can be fully condensed in the condenser 400 to obtain phenol liquid, thereby improving the condensation efficiency.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0047] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0048] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0049] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0050] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0051] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A bisphenol F dephenolization system based on water vapor compression, characterized in that: It includes a falling film evaporator, a heat exchanger, a steam compressor, a steam supply workshop, and steam delivery pipes; the steam supply workshop is used to provide high-temperature, high-pressure steam. The falling film evaporator has an inlet for feeding crude bisphenol F; the outlet of the steam conveying pipe is connected to the inlet of the falling film evaporator, the steam conveying pipe is used to convey high-temperature and high-pressure steam to the falling film evaporator, and the falling film evaporator is used to separate the crude bisphenol F product to be purified into hot phenol vapor and first bisphenol F liquid. The falling film evaporator has a first water vapor outlet and a first phenol vapor outlet; the heat exchanger has a water vapor inlet, a first phenol vapor inlet, a phenol liquid outlet, and a second water vapor outlet; the first water vapor outlet and the water vapor inlet are connected to each other through a pipe, and the first phenol vapor outlet and the first phenol vapor inlet are connected to each other through a pipe; the heat exchanger is used to exchange heat between hot phenol vapor and low-temperature, low-pressure water vapor. The second steam outlet is connected to the inlet of the steam compressor, and the inlet of the steam conveying pipe is connected to the outlet of the steam compressor and the outlet of the steam supply workshop. A first valve is provided between the air inlet of the steam delivery pipe and the air outlet of the steam supply workshop. The first valve is used to open and close the air outlet of the steam supply workshop.

2. The bisphenol F dephenolization system based on water vapor compression according to claim 1, characterized in that: It also includes thin-film evaporators; The falling film evaporator is provided with a first liquid outlet; the thin film evaporator is provided with a heat transfer oil inlet, a first bisphenol F inlet and a second phenol vapor outlet, the first bisphenol F inlet and the first liquid outlet are interconnected, and the second phenol vapor outlet and the first phenol vapor inlet are interconnected. The heat transfer oil inlet is connected to the heat transfer oil supply source, and the thin film evaporator is used to separate the first bisphenol F liquid into phenol vapor and the second bisphenol F liquid.

3. The bisphenol F dephenolization system based on water vapor compression according to claim 2, characterized in that: It also includes a high-temperature heat transfer oil inlet pipe, which is connected between the heat transfer oil supply and the thin-film evaporator; The high-temperature heat transfer oil inlet pipe is equipped with an oil supply switch valve, which is used to open and close the high-temperature heat transfer oil inlet pipe.

4. The bisphenol F dephenolization system based on water vapor compression according to claim 2, characterized in that: It also includes a feed pipe and a first bisphenol F liquid collection tank; The feed inlet of the feed pipe is connected to the first liquid outlet, and the discharge outlet of the feed pipe is connected to the first bisphenol F liquid inlet and the first bisphenol F liquid collection tank, respectively. A second valve is provided between the outlet of the conveying pipe and the first bisphenol F inlet. The second valve is used to adjust the inlet flow rate of the first bisphenol F inlet. A third valve is provided between the outlet of the conveying pipe and the first bisphenol F liquid collection tank. The third valve is used to adjust the liquid inflow of the first bisphenol F liquid collection tank.

5. The bisphenol F dephenolization system based on water vapor compression according to claim 4, characterized in that: It also includes an extruder; the thin film evaporator is provided with a second liquid outlet, the feed port of the extruder is connected to the second liquid outlet, and the extruder is used to convert the second bisphenol F liquid into bisphenol F solid.

6. The bisphenol F dephenolization system based on water vapor compression according to claim 5, characterized in that: It also includes a weighing and bagging machine, the inlet of which is connected to the outlet of the extruder.

7. A bisphenol F dephenolization system based on water vapor compression according to claim 6, characterized in that: It also includes phenol recovery tanks; The phenol liquid outlet is connected to the inlet of the phenol recovery tank via a pipeline; the phenol recovery tank is used to recover the phenol liquid.

8. The bisphenol F dephenolization system based on water vapor compression according to claim 7, characterized in that: It also includes the condenser; The phenol recovery tank has a third phenol vapor outlet and a phenol liquid inlet, and the third phenol vapor outlet, the condenser and the phenol liquid inlet are connected to each other in sequence through pipelines.

9. A bisphenol F dephenolization system based on water vapor compression according to claim 8, characterized in that: It also includes a circulating cooling water pipe, wherein the circulating cooling water output end of the circulating cooling water pipe is connected to the circulating cooling water input end of the condenser; The circulating cooling water pipe is equipped with a circulating cooling water regulating valve, which is used to open and close the circulating cooling water pipe.

Images