Reaction kettle for extracting phenol binary extractant

Abstract

The invention provides a reaction kettle for extracting a phenol binary extractant, and belongs to the technical field of chemical equipment. Comprising a supporting frame, a kettle body is fixedly installed on the inner side of the supporting frame, a feeding pipe is fixedly connected to one side of the top end of the kettle body, and a filtering box is fixedly connected to the bottom end of the kettle body. Through the arrangement of the anti-blocking assembly, the elastic telescopic rod conducts self-adaptive stretching according to radial resistance borne by the scrapers, the elastic telescopic rod stretches when the diameter of the inner wall is large to ensure that the scrapers are attached, the elastic telescopic rod contracts when the diameter is small to buffer resistance, rigid collision damage of the scrapers and the inner wall is avoided, and meanwhile an elastic piece stretches or compresses along with movement of the two scrapers to generate high-frequency micro-amplitude vibration; the adhesive force between hardened phenol crystals and the kettle wall can be destroyed, the crystals are prevented from being secondarily adhered to the cutting edge of the scraper, fluid can be disturbed through vibration, tiny crystal particles are scattered, and new crystals are reduced.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment technology, and in particular to a reaction vessel for extraction with a binary extractant of phenol. Background Technology

[0002] Phenol, as an important organic chemical raw material, is widely used in industries such as resins, pharmaceuticals, and dyes. However, it is also a typical toxic pollutant in industrial wastewater (such as coking wastewater and petrochemical wastewater). Direct discharge of phenol will seriously harm the ecological environment and human health. Phenol extraction technology, as the core means to achieve phenol separation and recovery or wastewater purification, has become one of the mainstream technologies in the current industrial field due to its advantages of high efficiency, low consumption, and scalability.

[0003] During the extraction process, phenol is prone to hardening and crystallizing on the inner wall of the reactor due to factors such as temperature fluctuations. If not cleaned in time, it will not only adhere to the reactor wall and affect the heat transfer efficiency, but may also enter the subsequent process with the material and cause pipeline blockage. In the existing anti-blocking structure, the scraper is mostly rigidly connected, which cannot adapt to the slight changes in the diameter of the inner wall of the reactor. It is easy to have a rigid collision with the inner wall, which will cause the scraper to be damaged. The scraper can only achieve passive scraping and it is difficult to break the adhesion between the crystal and the reactor wall. Moreover, the small crystals after scraping are easy to re-adhere to the scraper edge or re-aggregate, so the anti-blocking effect is limited. At the same time, the phenol extraction reaction is sensitive to temperature. Local low temperature can easily cause phenol to crystallize and precipitate, affecting the stability of the extraction reaction. Traditional temperature control methods mostly rely on external heating of the reactor wall or internal heating of a single stirring element. The heating area is limited and it is difficult to compensate for the local low temperature caused by the stirring shear force, which can easily lead to uneven temperature distribution in the reactor. Therefore, this application provides a reaction vessel for phenol binary extractant extraction to meet the requirements. Summary of the Invention

[0004] The technical problem this invention aims to solve is to provide a reaction vessel for phenol binary extractant extraction, addressing the issue that existing phenol extraction methods are prone to hardening and crystallizing on the inner wall of the vessel due to factors such as temperature fluctuations. If not cleaned in time, these crystals not only adhere to the vessel wall, affecting heat transfer efficiency, but may also cause pipeline blockage as the material enters subsequent processes. In existing anti-blocking structures, the scraper is mostly rigidly connected, unable to adapt to subtle changes in the diameter of the inner wall of the vessel, and is prone to rigid collision with the inner wall, leading to scraper damage. The scraper can only passively remove crystals, making it difficult to break the adhesion between the crystals and the vessel wall. Furthermore, the tiny crystals after scraping are prone to re-adhere to the scraper edge or re-aggregate, resulting in limited anti-blocking effectiveness. At the same time, the phenol extraction reaction is temperature-sensitive; excessively low local temperatures can easily lead to phenol crystallization, affecting the stability of the extraction reaction. Traditional temperature control methods mostly rely on external heating of the vessel wall or internal heating of a single stirring element, resulting in limited heating areas and difficulty in compensating for local low temperatures caused by stirring shear forces, easily leading to uneven temperature distribution within the vessel.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A reaction vessel for phenol binary extractant extraction includes a support frame, a vessel body fixedly mounted on the inner side of the support frame, a feed pipe fixedly connected to one side of the top of the vessel body, a filter box fixedly connected to the bottom of the vessel body, a discharge port fixedly connected to the bottom of the filter box, a stirring assembly installed inside the vessel body for stirring the substances poured into the vessel body, an anti-clogging assembly installed at the bottom of the stirring assembly for preventing substances from crystallizing and clogging the channel near the filter box at the bottom of the vessel body, and a temperature control assembly installed on the outside of the vessel body for heat preservation inside the vessel body.

[0006] Optionally, the stirring assembly includes a stirring shaft, which is rotatably mounted on the top of the inner wall of the vessel. A drive motor is connected to the top of the stirring shaft, and the drive motor is fixedly mounted on the top of the vessel. A sliding sleeve is fitted onto the outer side of the stirring shaft.

[0007] Optionally, the sliding sleeve slides within the straight groove on the outer side of the stirring shaft. Two stirring plates are symmetrically installed on the outer side of the sliding sleeve. A trigger rod is fixedly installed at the top of each stirring plate. The trigger rods contact the bottom surface of the inclined plate. The inclined plate is fixedly installed at the top of the inner wall of the vessel. A spring is fixedly connected to the bottom end of the sliding sleeve.

[0008] Optionally, the spring is sleeved on the outside of the stirring shaft, the other end of the spring is fixedly connected to the bottom end of the stirring shaft, a telescopic sleeve is fixedly connected between the bottom end of the sliding sleeve and the bottom end of the stirring shaft, and the spring is disposed on the inside of the telescopic sleeve.

[0009] Optionally, the anti-clogging component includes a connecting shaft, which is fixedly connected to the bottom of the stirring shaft, and four connecting plates are installed at equal angles on the outer side of the connecting shaft.

[0010] Optionally, the ends of the four connecting plates are fixedly connected to mounting brackets, and two scrapers are symmetrically mounted on the bottom end of each mounting bracket, with the two scrapers sliding on the inner side of the mounting bracket respectively.

[0011] Optionally, one side of each of the two scrapers is connected to an elastic telescopic rod, the other end of each elastic telescopic rod is connected to one side of the mounting bracket, a stirring plate is fixedly installed on the outside of the connecting shaft, and a spring sheet is connected between the two scrapers.

[0012] Optionally, the temperature control component includes an electrically controlled valve, which is fixedly installed on one side of the vessel body. The electrically controlled valve is connected to a temperature sensor via a wire, and the temperature sensor is fixedly nested on one side of the vessel body.

[0013] Optionally, the electrically controlled valve is connected to the insulation ring via a pipeline, the insulation ring is nested inside the vessel body, and one side of the electrically controlled valve is connected to an electric pump via a pipeline, the electric pump being connected to the storage tank via a pipeline.

[0014] Optionally, a heater is fixedly connected to one side of the storage tank, one side of the electrically controlled valve is connected to the internal channel of the connecting shaft and the second stirring plate via a pipeline, one side of the electrically controlled valve is connected to a heat exchange tank via a pipeline, one side of the heat exchange tank is fixedly connected to a one-way valve, and the one-way valve is connected to the storage tank via a pipeline.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: In the above scheme, by setting up a stirring assembly, the stirring shaft is driven to rotate by a drive motor, and the sliding sleeve and stirring plate 1 rotate synchronously. At the same time, with the contact and cooperation of the trigger rod and the inclined plate, stirring plate 1 is made to move vertically back and forth on the basis of rotation, forming a composite motion trajectory of rotation and vertical back and forth movement. This stirring method can break the laminar flow state of the raw materials and binary extractant in the vessel, cover materials at different heights in the vessel, realize all-round stirring, promote the uniform mixing of phenol extraction raw materials and binary extractant, effectively improve the mass transfer efficiency between the two, accelerate the dissolution and extraction reaction rate of phenol, and ensure that the extraction process is stable and efficient.

[0016] By incorporating anti-clogging components, the elastic telescopic rod adaptively extends and retracts according to the radial resistance experienced by the scraper. When the inner wall diameter is large, it extends to ensure the scraper fits snugly, and when the diameter is small, it contracts to buffer the resistance and prevent the scraper from being damaged by rigid collision with the inner wall. At the same time, the spring sheet follows the stretching or compression of the two scrapers, generating high-frequency micro-amplitude vibrations. This not only breaks the adhesion between the hardened phenol crystals and the reactor wall, preventing the crystals from adhering to the scraper edge again, but also disperses the tiny crystal particles by disturbing the fluid through vibration, reducing the formation of new crystals.

[0017] By setting a temperature control component, when the temperature inside the vessel is lower than the preset range, the electric control valve opens the return flow path, and the new heating oil squeezes the low-temperature heating oil in the insulation ring and stirring plate II, so that it flows back to the storage tank through the heat exchange box and the one-way valve for reheating, thereby improving the utilization rate of heating oil, avoiding the local temperature of heating oil being too low and affecting temperature control, and also reducing energy consumption.

[0018] By setting up a second stirring plate and a heat-insulating ring, the electric control valve diverts part of the heating oil to the internal channel between the connecting shaft and the second stirring plate. The heating oil transfers heat to the surrounding solution through the metal wall of the second stirring plate. Combined with the heat-insulating ring's insulation of the vessel wall, a dual structure is formed, with the heat-insulating ring surrounding the vessel and the internal stirring components of the second stirring plate providing heating. This precisely compensates for the local low temperature caused by the stirring shear force, completely avoiding the problem of phenol crystallization caused by excessively low local temperatures. Attached Figure Description

[0019] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a reaction vessel used for extraction with a binary extractant of phenol; Figure 2 A three-dimensional cross-sectional view of a reaction vessel used for extraction with a binary extractant of phenol. Figure 3 This is a schematic diagram of the three-dimensional structure of the stirring assembly; Figure 4 A three-dimensional structural diagram of the stirring shaft, spring, and telescopic assembly; Figure 5 A schematic diagram of the three-dimensional structure of the anti-blocking component; Figure 6 for Figure 5 Enlarged schematic diagram of the three-dimensional structure of A in the middle; Figure 7 A three-dimensional structural diagram of the mounting bracket, scraper, and flexible telescopic rod assembly; Figure 8 A three-dimensional structural diagram of the assembly of the stirring component, the anti-clogging component, and the temperature control component; Figure 9 This is a three-dimensional sectional view of the temperature control component. Figure 10 This is a schematic diagram of the three-dimensional structure of the temperature control component; Figure 11 This is a schematic diagram of the three-dimensional structure of the heat exchanger and check valve assembly.

[0021] Figure label: 1. Support frame; 2. Kettle body; 3. Feed pipe; 4. Filter box; 5. Discharge port; 6. Stirring assembly; 61. Stirring shaft; 62. Drive motor; 63. Sliding sleeve; 64. Stirring plate one; 65. Trigger rod; 66. Inclined plate; 67. Spring; 68. Telescopic sleeve; 7. Anti-clogging assembly; 71. Connecting shaft; 72. Connecting plate; 73. Mounting bracket; 74. Scraper; 75. Elastic telescopic rod; 76. Stirring plate two; 77. Spring; 8. Temperature control assembly; 81. Electrically controlled valve; 82. Temperature sensor; 83. Insulation ring; 84. Electric pump; 85. Storage tank; 86. Heater; 87. Heat exchanger; 88. Check valve.

[0022] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0023] The following is a detailed description of a phenol binary extractant reaction vessel provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0024] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0025] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0026] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0027] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0028] like Figures 1 to 11 As shown, an embodiment of the present invention provides a reaction vessel for extraction of phenol binary extractant, including a support frame 1, a vessel body 2 fixedly installed on the inner side of the support frame 1, a feed pipe 3 fixedly connected to one side of the top of the vessel body 2, a filter box 4 fixedly connected to the bottom of the vessel body 2, a discharge port 5 fixedly connected to the bottom of the filter box 4, a stirring assembly 6 installed inside the vessel body 2, the stirring assembly 6 being used to stir the substances poured into the vessel body 2, an anti-clogging assembly 7 installed at the bottom of the stirring assembly 6, the anti-clogging assembly 7 being used to prevent substances from crystallizing and clogging the channel near the filter box 4 at the bottom of the vessel body 2, and a temperature control assembly 8 installed on the outside of the vessel body 2, the temperature control assembly 8 being used to keep the inside of the vessel body 2 at a constant temperature.

[0029] like Figure 3 , Figure 4 and Figure 8 As shown, the stirring assembly 6 includes a stirring shaft 61, which is rotatably mounted on the top of the inner wall of the vessel body 2. A drive motor 62 is connected to the top of the stirring shaft 61, and the drive motor 62 is fixedly mounted on the top of the vessel body 2. A sliding sleeve 63 is fitted on the outer side of the stirring shaft 61, and the sliding sleeve 63 slides in the straight groove on the outer side of the stirring shaft 61. Two stirring plates 64 are symmetrically mounted on the outer side of the sliding sleeve 63. A trigger rod 65 is fixedly mounted on the top of each stirring plate 64, and the trigger rod 65 contacts the bottom surface of the inclined plate 66. The inclined plate 66 is fixedly mounted on the top of the inner wall of the vessel body 2. A spring 67 is fixedly connected to the bottom end of the sliding sleeve 63, and the spring 67 is fitted on the outer side of the stirring shaft 61. The other end of the spring 67 is fixedly connected to the bottom end of the stirring shaft 61. A telescopic sleeve 68 is directly fixedly connected to the bottom end of the sliding sleeve 63 and the bottom end of the stirring shaft 61, and the spring 67 is located inside the telescopic sleeve 68.

[0030] By setting up the stirring assembly 6, the operator controls the drive motor 62 to rotate via the control module (not shown in the figure). The drive motor 62 drives the stirring shaft 61 to rotate, and the sliding sleeve 63 drives the two side stirring plates 64 to rotate accordingly, mixing the raw materials and binary extractant. During the rotation of the two side stirring plates 64 driven by the sliding sleeve 63, the trigger rods 65 at the top of the two stirring plates 64 contact the bottom surface of the inclined plate 66 respectively. As the trigger rods 65 gradually move along the bottom surface of the inclined plate 66 to the lowest point, the contact height between them and the inclined plate 66 continuously decreases. Because the sliding sleeve 63 is sleeved on the outside of the stirring shaft 61, and The sliding sleeve 63 slides within the straight groove structure on the stirring shaft 61, preventing it from shifting horizontally with the trigger rod 65. Instead, it slides vertically along the straight groove, causing the sliding sleeve 63 to drive the stirring plates 64 on both sides to move in the same direction. During this process, the stirring plates 64 not only rotate with the stirring shaft 61 but also move vertically linearly with the sliding sleeve 63. This creates a combined rotational and translational motion trajectory for the stirring process of the stirring plates 64. This stirring method can break the laminar flow state of the raw materials and binary extractant in the vessel 2, avoiding the problem of sedimentation or uneven mixing in some areas due to insufficient stirring.

[0031] As the sliding sleeve 63 slides vertically downwards, the spring 67 located at the bottom of the sliding sleeve 63 gradually contracts under axial pressure. During the contraction of the spring 67, since the telescopic sleeve 68 is made of stainless steel, the top of the telescopic end of the telescopic sleeve 68 is fixedly connected to the bottom of the sliding sleeve 63, and the bottom of the fixed end of the telescopic sleeve 68 is connected to the end fixing structure of the stirring shaft 61. When the sliding sleeve 63 moves down, the telescopic sleeve 68 gradually contracts under tension, tightly fitting the outer surface of the spring 67. This effectively prevents the extraction raw materials, binary extractant, and other materials in the reactor from contacting the surface of the spring 67, avoiding material adhesion that could cause the spring 67 to jam or corrode, and ensuring the stable elastic recovery performance of the spring 67.

[0032] When the trigger rod 65 moves to the lowest contact point on the bottom surface of the inclined plate 66, it continues to move upward along the bottom surface of the inclined plate 66 as the stirring plate 64 rotates. At this time, the contact height between the trigger rod 65 and the inclined plate 66 begins to gradually increase, and the downward pressure on the sliding sleeve 63 gradually decreases. Under the action of its own elastic force, the spring 67 begins to slowly return to its original shape, pushing the sliding sleeve 63 to move vertically upward along the straight groove of the stirring shaft 61. At the same time, it drives the stirring plates 64 on both sides to move upward synchronously with the sliding sleeve 63. During this process, the telescopic sleeve 68 gradually... The extension maintains the protection of the spring 67. Through the continuous contact between the trigger rod 65 and the inclined plate 66, and the elastic extension and contraction of the spring 67, the sliding sleeve 63 can drive the stirring plate 64 to continuously reciprocate vertically while rotating with the stirring shaft 61. This allows the stirring plate 64 to fully stir the materials at different heights in the reactor, promote the uniform mixing of the phenol extraction raw material and the binary extractant, further improve the mass transfer efficiency between the raw material and the binary extractant, accelerate the reaction rate, and ensure that the phenol extraction reaction can proceed stably and efficiently.

[0033] like Figures 5 to 8 As shown, the anti-clogging component 7 includes a connecting shaft 71, which is fixedly connected to the bottom of the stirring shaft 61. Four connecting plates 72 are evenly distributed on the outer side of the connecting shaft 71. Mounting brackets 73 are fixedly connected to the ends of the four connecting plates 72. Two scrapers 74 are symmetrically installed at the bottom of each mounting bracket 73. The two scrapers 74 slide on the inner side of the mounting bracket 73. One side of each scraper 74 is connected to an elastic telescopic rod 75. The other end of each elastic telescopic rod 75 is connected to one side of the mounting bracket 73. Three stirring plates 76 are fixedly installed on the outer side of the connecting shaft 71. The stirring plates 76 are made of stainless steel and have good wear resistance. A spring 77 is connected between the two scrapers 74. The spring 77 is made of copper and has good ductility and a certain degree of elasticity.

[0034] By setting up the anti-clogging component 7, during the extraction and stirring process, the connecting shaft 71, located at the bottom conical structure of the vessel body 2, is fixedly connected to the stirring shaft 61 by bolts, thus rotating synchronously. The connecting shaft 71 drives the three stirring plates 76 to rotate, stirring the interior of the vessel body 2 near the bottom. At the same time, due to the heat dissipation airflow generated by the rotational shear force near the stirring plates 76 and 64, the extraction temperature in the solution decreases, causing the extracted phenol to crystallize below its melting point and adhere to the conical inner wall of the vessel body 2 near the filter box 4. At the position of the discharge port 5, the connecting shaft 71 drives the four connecting plates 72 and the mounting bracket 73 to rotate. The two scrapers 74 on each mounting bracket 73 are in close contact with the conical inner wall of the vessel body 2. This contact is maintained by the centrifugal force generated by the connecting shaft 71 driving the connecting plates 72 and the mounting bracket 73 to rotate. As the mounting bracket 73 rotates, the corresponding two scrapers 74 slide relative to the conical inner wall, scraping off the phenol crystals adhering to the wall layer by layer. The crystals scraped off by the scraper 74 are detached from the inner wall under the action of gravity and solution flow, and reintegrated into the solution, thus avoiding the continuous accumulation of crystals.

[0035] When the connecting shaft 71 drives the mounting bracket 73 to rotate, the centrifugal force causes the scraper 74 to slide towards the edge inside the corresponding mounting bracket 73. During one rotation of the mounting bracket 73, the height of the scraper 74 and the angle of inclination in contact with the inner wall of the vessel 2 are different. The radial resistance experienced by the scraper 74 will change with the angle of inclination of the inner wall of the vessel 2 and the resistance experienced on the inner wall. The elastic telescopic rod 75 will extend and retract accordingly according to the magnitude of the resistance experienced by the scraper 74. When the scraper 74 moves to an area with a larger inner diameter, the centrifugal force can ensure that the elastic telescopic rod 75 extends to protect the scraper. The scraper remains in close contact with the inner wall. When it moves to a smaller diameter area, the reverse thrust of the inner wall on the scraper increases, and the elastic telescopic rod 75 retracts to buffer the resistance, preventing damage caused by rigid collision between the scraper and the inner wall. By using centrifugal force to achieve an adaptive scraping structure, the scraper 74 effectively cleans all positions on the conical inner wall of the vessel 2, while the flexible connection of the elastic telescopic rod 75 provides equipment protection. This ensures that the scraping action of the scraper 74 is perfectly adapted to the structure of the vessel 2, thereby stably maintaining the cleanliness of the vessel 2 and the extraction environment, and ensuring the continuity and efficiency of the phenol extraction process.

[0036] Meanwhile, when the two scrapers 74 move along the inner side of the mounting bracket 73 under the combined action of centrifugal force and the resistance of the inner wall of the vessel 2, the spring 77 connected between the two scrapers 74 will undergo tensile or compressive deformation with the relative displacement of the scrapers 74. Since the spring 77 is made of metal, it has high rigidity and elastic recovery capability. During the reciprocating extension and retraction process, it can cause high-frequency micro-amplitude vibration. When the scraper 74 scrapes the crystals against the inner wall of the vessel 2, it not only performs the conventional mechanical scraping action, but also has a high-frequency vibration effect. For phenol crystals that have hardened due to long-term adhesion, the vibration can effectively destroy the adhesion between the crystals and the inner wall of the vessel 2, making the scraping process easier. At the same time, it avoids the accumulation of crystals on the cutting edge of the scraper 74 to form secondary adhesion. Moreover, the vibration of the spring 77 will also transfer energy to the surrounding solution, forming local fluid disturbance, which can disperse the tiny phenol crystal particles that are about to adhere to the vessel wall, so that the crystals are resuspended in the solution, reducing the probability of new crystal formation.

[0037] like Figures 8 to 11 As shown, the temperature control component 8 includes an electrically controlled valve 81, which is fixedly installed on one side of the vessel body 2. The electrically controlled valve 81 is connected to a temperature sensor 82 via a wire. The temperature sensor 82 is fixedly nested on one side of the vessel body 2. The electrically controlled valve 81 is connected to a heat insulation ring 83 via a pipeline. The heat insulation ring 83 is nested on the inner side of the vessel body 2. An electric pump 84 is connected to one side of the electrically controlled valve 81 via a pipeline. The electric pump 84 is connected to a storage tank 85 via a pipeline. A heater 86 is fixedly connected to one side of the storage tank 85. One side of the electrically controlled valve 81 is connected to the internal channel of the connecting shaft 71 and the stirring plate 76 via a pipeline. A heat exchange box 87 is connected to one side of the electrically controlled valve 81 via a pipeline. A one-way valve 88 is fixedly connected to one side of the heat exchange box 87. The one-way valve 88 is connected to the storage tank 85 via a pipeline.

[0038] By setting the temperature control component 8, during the extraction and stirring process inside the vessel 2, the heater 86, controlled by the control module (not shown in the figure), heats the heating oil inside the storage tank 85. After heating, the oil is pumped by the electric pump 84 into the insulation ring 83 between the electric control valve 81 and the inner wall of the vessel 2. The insulation ring 83 is distributed close to the inner wall of the vessel 2, and the flow guiding structure inside the insulation ring 83 allows the heating oil to evenly fill the inner wall of the vessel 2. Through thermal conduction, heat is transferred to the interior of the vessel 2, forming a surrounding heating and insulation effect. This effectively offsets the heat loss caused by the heat dissipation airflow during stirring and maintains the extraction environment inside the vessel 2. Temperature stability is maintained to prevent phenol crystallization due to localized cooling. Since different types of binary extractants have different melting points, their physical states (solid, liquid, gas) vary. The set temperature ensures that the raw materials and binary extractants inside the vessel 2 remain within the controlled temperature range, guaranteeing the extractant maintains a highly fluid liquid state and forms a uniform mixture with the raw materials. This provides sufficient contact area for phenol dissolution. Through the diversion action of the electrically controlled valve 81, a portion of the heated oil is introduced through a pipeline into the internal channel of the connecting shaft 71 and the stirring plate 76. The heated oil flows along the channel of the connecting shaft 71. After reaching the interior of the stirring plate 76, the oil quickly fills its chamber, transferring heat to the surrounding solution through the metal wall of the stirring plate 76. Temperature sensor 82 measures the temperature of the solution inside the vessel 2. When the temperature of the solution inside the vessel 2 falls below the preset temperature control range, the electric control valve 81 opens the passage between the return pipe and the heat exchange box 87. Electric pump 84 then pumps the newly heated oil into the insulation ring 83 and the interior of the stirring plate 76, respectively. This causes the cooled heating oil inside the insulation ring 83 and the stirring plate 76 to be compressed by the newly added heating oil, flowing into the heat exchange box 87 through the return pipe connected by the electric control valve 81. The oil flows into the interior of the heating box 87 and back to the interior of the storage tank 85 through the one-way valve 88, and is then reheated by the heater 86. This improves the utilization rate of the heating oil and avoids the problem of localized phenol crystallization inside the vessel body 2 due to excessively low local temperatures of the heating oil. At the same time, by combining the heat preservation of the inner wall of the vessel body 2 with the internal heating of the stirring plate 76, the internal temperature of the vessel body 2 can be kept stable by the heat preservation ring 83, and the heat can be evenly transferred to all corners inside the vessel body 2 by the rotation of the stirring plate 76. This completely solves the problem of localized low temperature caused by stirring shear force and also avoids the problem of phenol crystallization accumulating at the bottom connection of the vessel body 2.

[0039] The working principle of the technical solution provided by this invention is as follows: First, the raw materials and binary extractant are fed into the vessel body 2 in batches through the feed pipe 3. The operator controls the drive motor 62 to rotate via the control module (not shown in the figure). The drive motor 62 drives the stirring shaft 61 to rotate, and the sliding sleeve 63 drives the two stirring plates 64 on both sides to rotate accordingly, mixing and stirring the raw materials and binary extractant. During the rotation of the two stirring plates 64 by the sliding sleeve 63, the trigger rods 65 at the top of the two stirring plates 64 contact the bottom surface of the inclined plate 66 respectively. As the trigger rods 65 gradually move along the bottom surface of the inclined plate 66 to the lowest point, the contact height between them and the inclined plate 66 continuously decreases. Due to the sliding sleeve 63... The sliding sleeve 63 slides outside the stirring shaft 61 and within the straight groove structure on the stirring shaft 61, preventing the sliding sleeve 63 from shifting horizontally with the trigger rod 65. Instead, it slides vertically along the straight groove, causing the sliding sleeve 63 to drive the stirring plates 64 on both sides to move in the same direction. During this process, the stirring plates 64 not only rotate with the stirring shaft 61 but also move vertically linearly with the sliding sleeve 63. This creates a combined rotational and translational motion trajectory for the stirring process of the stirring plates 64. This stirring method can break the laminar flow state of the raw materials and binary extractant in the vessel 2, avoiding the problem of sedimentation or uneven mixing in some areas due to insufficient stirring.

[0040] As the sliding sleeve 63 slides vertically downwards, the spring 67 located at the bottom of the sliding sleeve 63 gradually contracts under axial pressure. During the contraction of the spring 67, since the telescopic sleeve 68 is made of stainless steel, the top of the telescopic end of the telescopic sleeve 68 is fixedly connected to the bottom of the sliding sleeve 63, and the bottom of the fixed end of the telescopic sleeve 68 is connected to the end fixing structure of the stirring shaft 61. When the sliding sleeve 63 moves down, the telescopic sleeve 68 gradually contracts under tension, tightly fitting the outer surface of the spring 67. This effectively prevents the extraction raw materials, binary extractant, and other materials in the reactor from contacting the surface of the spring 67, avoiding material adhesion that could cause the spring 67 to jam or corrode, and ensuring the stable elastic recovery performance of the spring 67.

[0041] When the trigger rod 65 moves to the lowest contact point on the bottom surface of the inclined plate 66, it continues to move upward along the bottom surface of the inclined plate 66 as the stirring plate 64 rotates. At this time, the contact height between the trigger rod 65 and the inclined plate 66 begins to gradually increase, and the downward pressure on the sliding sleeve 63 gradually decreases. Under the action of its own elastic force, the spring 67 begins to slowly return to its original shape, pushing the sliding sleeve 63 to move vertically upward along the straight groove of the stirring shaft 61. At the same time, it drives the stirring plates 64 on both sides to move upward synchronously with the sliding sleeve 63. During this process, the telescopic sleeve 68 gradually... The extension maintains the protection of the spring 67. Through the continuous contact between the trigger rod 65 and the inclined plate 66, and the elastic extension and contraction of the spring 67, the sliding sleeve 63 can drive the stirring plate 64 to continuously reciprocate vertically while rotating with the stirring shaft 61. This allows the stirring plate 64 to fully stir the materials at different heights in the reactor, promote the uniform mixing of the phenol extraction raw material and the binary extractant, further improve the mass transfer efficiency between the raw material and the binary extractant, accelerate the reaction rate, and ensure that the phenol extraction reaction can proceed stably and efficiently.

[0042] During the extraction and stirring process, the connecting shaft 71, located at the bottom conical structure of the vessel body 2, is fixedly connected to the stirring shaft 61 by bolts, thus rotating synchronously. The connecting shaft 71 drives the three stirring plates 76 to rotate, stirring the interior of the vessel body 2 near the bottom. Simultaneously, due to the heat dissipation airflow generated by the rotational shear force near the stirring plates 76 and 64, the extraction temperature in the solution decreases, causing the extracted phenol to crystallize below its melting point. This crystallizes and adheres to the conical inner wall of the vessel body 2 near the filter box 4 and the discharge port 5. The connecting shaft 71 rotates by driving four connecting plates 72 and mounting brackets 73. Two scrapers 74 on each mounting bracket 73 are in close contact with the conical inner wall of the vessel body 2. This contact is maintained by the centrifugal force generated by the rotation of the connecting plates 72 and mounting brackets 73 driven by the connecting shaft 71. As the mounting brackets 73 rotate, the corresponding two scrapers 74 slide relative to the conical inner wall, scraping off the phenol crystals adhering to the wall layer by layer. The crystals scraped off by the scrapers 74 detach from the inner wall under the action of gravity and solution flow, and reintegrate into the solution, thus avoiding the continuous accumulation of crystals.

[0043] When the connecting shaft 71 drives the mounting bracket 73 to rotate, the centrifugal force causes the scraper 74 to slide towards the edge inside the corresponding mounting bracket 73. During one rotation of the mounting bracket 73, the height of the scraper 74 and the angle of inclination in contact with the inner wall of the vessel 2 are different. The radial resistance experienced by the scraper 74 will change with the angle of inclination of the inner wall of the vessel 2 and the resistance experienced on the inner wall. The elastic telescopic rod 75 will extend and retract accordingly according to the magnitude of the resistance experienced by the scraper 74. When the scraper 74 moves to an area with a larger inner diameter, the centrifugal force can ensure that the elastic telescopic rod 75 extends to protect the scraper. The scraper remains in close contact with the inner wall. When it moves to a smaller diameter area, the reverse thrust of the inner wall on the scraper increases, and the elastic telescopic rod 75 retracts to buffer the resistance, preventing damage caused by rigid collision between the scraper and the inner wall. By using centrifugal force to achieve an adaptive scraping structure, the scraper 74 effectively cleans all positions on the conical inner wall of the vessel 2, while the flexible connection of the elastic telescopic rod 75 provides equipment protection. This ensures that the scraping action of the scraper 74 is perfectly adapted to the structure of the vessel 2, thereby stably maintaining the cleanliness of the vessel 2 and the extraction environment, and ensuring the continuity and efficiency of the phenol extraction process.

[0044] Meanwhile, when the two scrapers 74 move along the inner side of the mounting bracket 73 under the combined action of centrifugal force and the resistance of the inner wall of the vessel 2, the spring 77 connected between the two scrapers 74 will undergo tensile or compressive deformation with the relative displacement of the scrapers 74. Since the spring 77 is made of metal, it has high rigidity and elastic recovery capability. During the reciprocating extension and retraction process, it can cause high-frequency micro-amplitude vibration. When the scraper 74 scrapes the crystals against the inner wall of the vessel 2, it not only performs the conventional mechanical scraping action, but also has a high-frequency vibration effect. For phenol crystals that have hardened due to long-term adhesion, the vibration can effectively destroy the adhesion between the crystals and the inner wall of the vessel 2, making the scraping process easier. At the same time, it avoids the accumulation of crystals on the cutting edge of the scraper 74 to form secondary adhesion. Moreover, the vibration of the spring 77 will also transfer energy to the surrounding solution, forming local fluid disturbance, which can disperse the tiny phenol crystal particles that are about to adhere to the vessel wall, so that the crystals are resuspended in the solution, reducing the probability of new crystal formation.

[0045] During the extraction and stirring process inside the vessel 2, the heater 86, controlled by the control module (not shown in the figure), heats the heating oil inside the storage tank 85. After heating, the oil is pumped into the electric control valve 81 and the heat preservation ring 83 inside the inner wall of the vessel 2 by the electric pump 84. The heat preservation ring 83 is distributed close to the inner wall of the vessel 2. The flow guiding structure inside the heat preservation ring 83 allows the heating oil to fill the inner wall of the vessel 2 evenly. Through thermal conduction, the heat is transferred to the inside of the vessel 2, forming a surrounding heating and heat preservation effect. This effectively offsets the heat loss caused by the heat dissipation airflow during stirring, maintains a stable extraction environment temperature inside the vessel 2, and avoids phenol crystallization due to local cooling. Since the binary extractant has different types and melting points, its physical form (solid, liquid, gas) is different. According to the set temperature, the raw materials and binary extractant inside the vessel 2 can always be kept within the temperature control range, ensuring that the extractant always maintains a liquid with good fluidity and forms a uniform mixing system with the raw materials, providing sufficient contact area for the dissolution of phenol.

[0046] Under the diversion action of the solenoid valve 81, part of the heated oil is added through the pipeline into the internal channel of the connecting shaft 71 and the second stirring plate 76. After the heated oil flows along the channel of the connecting shaft 71 into the interior of the second stirring plate 76, it quickly fills the chamber of the second stirring plate 76. The heat is transferred to the surrounding solution through the metal wall of the second stirring plate 76. The temperature of the solution inside the vessel 2 is measured by the temperature sensor 82. When the temperature of the solution inside the vessel 2 is lower than the preset temperature control range, the passage between the return pipeline and the heat exchange box 87 is opened by the solenoid valve 81. The newly heated oil is pumped by the electric pump 84 into the interior of the insulation ring 83 and the second stirring plate 76 respectively. The cooled heating oil inside the insulation ring 83 and the second stirring plate 76 is squeezed by the newly added heating oil and flows into the interior of the heat exchange box 87 through the return pipeline connected by the solenoid valve 81. It is then returned through the one-way valve 88. The oil flows into the storage tank 85 and is reheated by the heater 86 to improve the utilization rate of the heating oil and avoid the problem of local phenol crystallization caused by excessively low local temperature of the heating oil. At the same time, by using the heat preservation of the inner wall of the vessel 2 in conjunction with the internal heating of the stirring plate 76, the internal temperature of the vessel 2 can be kept stable by the heat preservation ring 83, and the heat can be evenly transferred to all corners of the vessel 2 by the rotation of the stirring plate 76. This completely solves the problem of local low temperature caused by stirring shear force and also avoids the problem of phenol crystallization accumulating at the bottom connection of the vessel 2. After the extraction reaction is completed, the operator first stops the drive motor 62 from rotating and then opens the discharge port 5. The extracted phenol solution flows along the conical inner wall of the vessel 2 to the filter box 4. The filter box 4 is used to filter the raffinate produced in the extraction reaction. After filtration, the phenol solution flows out from the discharge port 5.

[0047] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0048] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A reaction vessel for extraction with a phenol binary extractant, characterized in that, The system includes a support frame, on the inner side of which a vessel body is fixedly installed. A feed pipe is fixedly connected to one side of the top of the vessel body, and a filter box is fixedly connected to the bottom of the vessel body. A discharge port is fixedly connected to the bottom of the filter box. It also includes a stirring assembly, which is installed inside the vessel body and is used to stir the substances poured into the vessel body; An anti-clogging component is installed at the bottom of the stirring component to prevent material crystallization from clogging the channel at the bottom of the vessel near the filter box. A temperature control component is installed on the outside of the vessel body and is used to keep the inside of the vessel body warm.

2. The reaction vessel for extraction with the phenol binary extractant according to claim 1, characterized in that, The stirring assembly includes a stirring shaft, which is rotatably mounted on the top of the inner wall of the vessel. A drive motor is connected to the top of the stirring shaft, and the drive motor is fixedly mounted on the top of the vessel. A sliding sleeve is fitted onto the outer side of the stirring shaft.

3. The reaction vessel for extraction with the phenol binary extractant according to claim 2, characterized in that, The sliding sleeve slides in the straight groove on the outer side of the stirring shaft. Two stirring plates are symmetrically installed on the outer side of the sliding sleeve. A trigger rod is fixedly installed at the top of each stirring plate. The trigger rods are in contact with the bottom surface of the inclined plate. The inclined plate is fixedly installed at the top of the inner wall of the vessel. A spring is fixedly connected to the bottom end of the sliding sleeve.

4. The reaction vessel for extraction with the phenol binary extractant according to claim 3, characterized in that, The spring is sleeved on the outside of the stirring shaft, and the other end of the spring is fixedly connected to the bottom end of the stirring shaft. A telescopic sleeve is fixedly connected between the bottom end of the sliding sleeve and the bottom end of the stirring shaft, and the spring is located on the inside of the telescopic sleeve.

5. The reaction vessel for extraction with the phenol binary extractant according to claim 4, characterized in that, The anti-clogging component includes a connecting shaft, which is fixedly connected to the bottom of the stirring shaft, and four connecting plates are installed at equal angles on the outer side of the connecting shaft.

6. The reaction vessel for extraction with the phenol binary extractant according to claim 5, characterized in that, The ends of the four connecting plates are fixedly connected to mounting brackets, and two scrapers are symmetrically installed at the bottom of each mounting bracket. The two scrapers slide on the inner side of the mounting bracket respectively.

7. The reaction vessel for extraction with the phenol binary extractant according to claim 6, characterized in that, One side of each of the two scrapers is connected to an elastic telescopic rod, and the other end of each elastic telescopic rod is connected to one side of the mounting frame. A stirring plate is fixedly installed on the outside of the connecting shaft, and a spring sheet is connected between the two scrapers.

8. The reaction vessel for extraction with the phenol binary extractant according to claim 7, characterized in that, The temperature control component includes an electrically controlled valve, which is fixedly installed on one side of the vessel body. The electrically controlled valve is connected to a temperature sensor via a wire, and the temperature sensor is fixedly nested on one side of the vessel body.

9. The reaction vessel for extraction with the phenol binary extractant according to claim 8, characterized in that, The electrically controlled valve is connected to the insulation ring via a pipeline. The insulation ring is nested inside the vessel body. One side of the electrically controlled valve is connected to an electric pump via a pipeline. The electric pump is connected to the storage tank via a pipeline.

10. The reaction vessel for extraction with the phenol binary extractant according to claim 9, characterized in that, A heater is fixedly connected to one side of the storage tank. One side of the electrically controlled valve is connected to the internal channel of the connecting shaft and the second stirring plate via a pipeline. One side of the electrically controlled valve is connected to a heat exchange tank via a pipeline. One side of the heat exchange tank is fixedly connected to a one-way valve. The one-way valve is connected to the storage tank via a pipeline.

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