A kind of reaction kettle and preparation process for resin

Abstract

The present invention relates to the technical field of reactors, and specifically discloses a reactor for preparing resin and a preparation process thereof, comprising: a reactor body and an inner coil, wherein a sealing cover is provided at the top of the reactor body, the inner coil is arranged in the reactor body, a first driving member is provided on the reactor body, a stirring mechanism is provided on the inner coil, the stirring mechanism comprises a sliding block, a first stirring plate and a second stirring plate, the sliding block is slidably fitted on the inner coil, the first stirring plate and the second stirring plate are connected by a connecting rod, the connecting rod is slidably fitted on the sliding block, a driving mechanism is provided in the inner coil, and the driving mechanism is used to drive the first stirring plate and the second stirring plate to move; during the heating and stirring process of the reactor for preparing resin and the preparation process thereof, the inner coil can rotate, and the first stirring plate and the second stirring plate stir the material in the reactor body to prevent uneven mixing of the materials.

Description

Technical Field

[0001] The invention relates to the technical field of reaction kettles, and in particular to a reaction kettle for preparing resin and a preparation process thereof. Background Art

[0002] Phenolic resin adhesive is composed of phenolic resin, filler and adhesive. Phenolic resin itself is a synthetic thermosetting resin, mainly obtained by the polycondensation reaction of phenol and aldehyde. This adhesive is usually milky white or light yellow, with good fluidity, high bonding strength and fast curing speed. As an important industrial adhesive, phenolic resin adhesive has a wide range of applications.

[0003] The preparation process of phenolic resin adhesive is complicated, involving multiple steps and condition control. Generally speaking, the preparation process includes placing a certain amount of phenol in a reactor, and reacting by heating, stirring, adding formaldehyde solution and catalyst. After the reaction is completed, the phenolic resin adhesive is obtained by cooling, discharging and other treatments.

[0004] A Chinese patent with authorization announcement number CN218393701U discloses a phenolic resin adhesive production reactor, which includes a reactor body, a gas recovery component is arranged above one side of the reactor body, a motor is arranged above the reactor body, a stirring shaft is arranged at the output end of the motor through the reactor body, a stirring blade is arranged on the surface of the stirring shaft, a scraping component is arranged inside the reactor body, and the scraping component is also arranged on the surface of the stirring shaft, a circulating water cooling component is arranged on the side of the reactor body away from the gas recovery component, and a heating component is arranged below the circulating water cooling component.

[0005] The above patent provides a scraping component, so that when the device is in use, it is easy to scrape off the phenolic resin adhered to the inner wall of the reactor body.

[0006] However, for the inner coil type reactor, the inner coil is located inside the reactor, occupies the inner space of the reactor, and will hinder the flow of materials. Summary of the invention

[0007] The invention provides a reaction kettle for preparing resin and a preparation process, aiming to solve the problem in the related art that an inner coil hinders the flow of materials and causes low reaction efficiency.

[0008] The reaction kettle for preparing resin of the present invention comprises: a kettle body and an inner coil;

[0009] A sealing cover is provided on the top of the kettle body;

[0010] The inner coil is arranged in the kettle body;

[0011] The kettle body is provided with a first driving member, which is used to drive the inner coil to rotate. The inner coil is provided with a stirring mechanism, which includes a sliding block, a first stirring plate and a second stirring plate. The sliding block is slidably fitted on the inner coil. The first stirring plate and the second stirring plate are connected by a connecting rod, which is slidably fitted on the sliding block. The inner coil is provided with a driving mechanism, which is used to drive the first stirring plate and the second stirring plate to move radially along the kettle body.

[0012] Beneficial effect: the inner coil is driven to rotate by the first driving member, and the sliding block is driven to slide along the inner coil by the driving mechanism. While the sliding block slides, the driving mechanism also pushes the first stirring plate and the second stirring plate to reciprocate along the radial direction of the kettle body, thereby achieving stirring of the material in the kettle body, which is beneficial to the flow of the material in the kettle body and prevents uneven mixing of the materials.

[0013] Preferably, the driving mechanism includes a rotating ring, a first gear, a second gear and a rotating seat, the rotating ring rotatably engaged with the bottom of the fixed upper seat, the top of the inner wall of the inner coil has a driving tooth groove, the first gear rotatably engages with the rotating ring and meshes with the driving tooth groove, the second gear is fixedly connected to the rotating seat and meshes with the first gear, the rotating seat is fixedly connected to the rotating ring, the rotating seat is provided with a first slide groove, the rotating seat is slidably engaged with a driving block, the driving block is provided with a second slide groove, the second gear is fixedly connected to a driving rod, the driving rod extends into the second slide groove and slidably engages with the second slide groove, the driving block is fixedly connected to a telescopic rod, the telescopic rod slidably engages in the first slide groove, and the telescopic rod is connected to the first stirring plate.

[0014] Preferably, the top and bottom ends of the sliding block both abut against the inner coil, and the sliding block is provided with a first scraper and a second scraper, respectively. The first scraper abuts against the inner wall of the inner coil, and the second scraper abuts against the outer wall of the inner coil.

[0015] The effect is that the first scraper and the second scraper can limit the sliding block to prevent the sliding block from detaching from the inner coil, and can also scrape the inner wall and outer wall of the inner coil during the movement of the sliding block to prevent material from adhering to the inner coil.

[0016] Preferably, the connecting rod is an elastic telescopic rod, and the length of the connecting rod is greater than the distance between the inner coil and the inner wall of the kettle body.

[0017] The effect is that when the first stirring plate moves radially outward along the kettle body, the second stirring plate will gradually approach the inner wall of the kettle body until it stops there. At this time, the first stirring plate continues to move outward, causing the connecting rod to contract, and the second stirring plate is tightly attached to the inner wall of the kettle body and moves along the inner wall of the kettle body, thereby being able to scrape off the material attached to the inner wall of the kettle body.

[0018] Preferably, the outer wall of the second stirring plate is a curved surface structure, the curvature of which is the same as the curvature of the inner wall of the kettle body, and the outer wall of the second stirring plate can fit the inner wall of the kettle body.

[0019] The effect is that the outer wall of the second stirring plate can fit closely with the inner wall of the kettle body, thereby improving the efficiency of the second stirring plate in scraping off the material attached to the inner wall of the kettle body and preventing the generation of cleaning dead corners.

[0020] Preferably, a fixed lower seat is provided at the bottom of the kettle body, and a fixed upper seat is provided at the top of the kettle body, and the inner coil is rotatably fitted between the fixed lower seat and the fixed upper seat, and the fixed upper seat and the fixed lower seat are used to fix the inner coil.

[0021] The effect is that the fixed upper seat and the fixed lower seat are used to fix the inner coil to prevent the inner coil from falling off.

[0022] Preferably, a liquid inlet annular cavity is provided in the fixed upper seat, and the liquid inlet annular cavity is connected to the inner coil pipe. A liquid inlet is provided at the top of the fixed upper seat. A liquid outlet annular cavity is provided at the bottom of the fixed lower seat, and the liquid outlet annular cavity is connected to the inner coil pipe. A liquid outlet is provided at the bottom of the fixed lower seat, and the liquid outlet is connected to the liquid outlet annular cavity. Both the liquid inlet and the liquid outlet are connected to an external oil tank.

[0023] A resin preparation process, applied to the above-mentioned resin preparation reactor, comprises the following steps:

[0024] The first step is raw material preparation, adding phenol, formaldehyde and catalyst into the kettle according to the set ratio;

[0025] The second step is heating and stirring. Hot oil is introduced into the inner coil. While heating, the first driving member drives the inner coil to rotate. The rotation of the inner coil drives the sliding block to slide along the inner coil through the driving mechanism, and the first stirring plate and the second stirring plate reciprocate along the radial direction of the kettle body. Under the joint action of the inner coil, the first stirring plate and the second stirring plate, the material in the kettle body is stirred to achieve a condensation reaction between phenol and formaldehyde.

[0026] The third step is dehydration and cooling. After the reaction is completed, a dehydration operation is performed to remove moisture from the resin. After dehydration, cold oil is input into the inner coil to perform cooling treatment to obtain a solid phenolic resin adhesive.

[0027] Beneficial effect: During the heating and stirring process, the inner coil is driven to rotate by the first driving member, and the sliding block is driven to slide along the inner coil by the driving mechanism. While the sliding block slides, the driving mechanism also pushes the first stirring plate and the second stirring plate to reciprocate along the radial direction of the kettle body, thereby achieving stirring of the material in the kettle body, which is beneficial to the flow of the material in the kettle body and prevents uneven mixing of the materials.

[0028] By adopting the above technical solution, the beneficial effects of the present invention are:

[0029] According to the reaction kettle and preparation process for resin preparation of the present invention, during the heating and stirring process, the inner coil is driven to rotate by the first driving member, and the sliding block is driven to slide along the inner coil by the driving mechanism. While the sliding block slides, the driving mechanism also pushes the first stirring plate and the second stirring plate to reciprocate along the radial direction of the kettle body, thereby achieving stirring of the material in the kettle body, which is beneficial to the flow of the material in the kettle body and prevents uneven mixing of the materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of a reaction kettle for preparing resin according to an embodiment of the present invention.

[0031] Figure 2 2 is a cross-sectional view of a reaction kettle for preparing resin according to an embodiment of the present invention.

[0032] Figure 3 It is a schematic diagram of the internal structure of a kettle body according to an embodiment of the present invention.

[0033] Figure 4 Schematic diagram of the position of the driving mechanism of an embodiment of the present invention.

[0034] Figure 5 It is a schematic diagram of the coordination of the driving mechanism and the stirring mechanism of an embodiment of the present invention.

[0035] Figure 6 It is a schematic diagram of the fixed upper seat structure of an embodiment of the present invention.

[0036] Figure 7 It is a schematic diagram of the fixed lower seat structure of an embodiment of the present invention.

[0037] Reference numerals:

[0038] 1. Kettle body; 2. Sealing cover; 3. Inner coil; 4. Fixed upper seat; 41. Liquid inlet ring cavity; 42. Liquid inlet; 5. Fixed lower seat; 51. Liquid outlet ring cavity; 52. Liquid outlet; 6. First driving member; 7. Driving gear; 81. Sliding block; 811. First scraper; 812. Second scraper; 82. First stirring plate; 83. Second stirring plate; 84. Connecting rod; 91. Rotating ring; 92. First gear; 93. Second gear; 94. Rotating seat; 95. Driving rod; 96. Driving block; 97. Telescopic rod; 10. Thermometer; 11. Pressure gauge. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0040] like Figures 1 to 7 As shown, the reaction kettle for preparing resin of the present invention comprises: a kettle body 1 and an inner coil 3.

[0041] Specifically, Figure 1 and Figure 2 As shown, a sealing cover 2 is provided on the top of the kettle body 1 , and the sealing cover 2 is used to seal the kettle body 1 . The inner coil 3 is arranged in the kettle body 1 .

[0042] like Figure 1 As shown, a thermometer 10 is provided on the side wall of the kettle body 1, and a probe of the thermometer 10 passes through the side wall of the kettle body 1 and extends into the kettle body 1; a pressure gauge 11 is provided on the sealing cover 2, and a probe of the pressure gauge 11 passes through the sealing cover 2 and extends into the kettle body 1.

[0043] like Figure 2 and Figure 3 As shown, a fixed upper seat 4 and a fixed lower seat 5 are provided inside the kettle body 1, and both the fixed upper seat 4 and the fixed lower seat 5 are fixedly connected to the kettle body 1, and the two are spaced apart from each other, and the inner coil 3 is rotatably fitted between the fixed upper seat 4 and the fixed lower seat 5, and the top end of the inner coil 3 is engaged with the fixed upper seat 4, and the bottom end thereof is engaged with the fixed lower seat 5. A first driving member 6 is provided outside the kettle body 1, and the first driving member 6 is a motor, and its output end extends into the kettle body 1, and a driving gear 7 is provided at the output end of the first driving member 6, and the driving gear 7 is meshed with the tooth groove on the outer wall of the inner coil 3, and the first driving member 6 drives the inner coil 3 to rotate through the driving gear 7.

[0044] like Figures 3 to 6As shown, the inner coil 3 is also provided with a stirring mechanism, which includes a sliding block 81, a first stirring plate 82 and a second stirring plate 83. The sliding block 81 is located at the spiral gap of the inner coil 3, and its top and bottom ends are both stopped against the inner coil 3. The first stirring plate 82 and the second stirring plate 83 are connected by a connecting rod 84, which is an elastic telescopic rod. The connecting rod 84 is slidably fitted on the sliding block 81. The outer wall of the second stirring plate 83 is a curved surface structure, and its curvature is the same as the inner wall of the kettle body 1. The first scraper 811 and the second scraper 812 are respectively provided on both sides of the sliding block 81. The first scraper 811 stops against the inner wall of the inner coil 3, and the second scraper 812 stops against the outer wall of the inner coil 3. The first scraper 811 and the second scraper 812 can limit the sliding block 81 to prevent the sliding block 81 from detaching from the inner coil 3. When the sliding block 81 moves along the inner coil 3, it can also scrape off the materials attached between the inner wall and the outer wall of the inner coil 3. A driving mechanism is also provided on the inner coil 3, and the driving mechanism includes a rotating ring 91, a first gear 92, a second gear 93 and a rotating seat 94. The rotating ring 91 is rotatably fitted on the bottom of the fixed upper seat 4, and a driving tooth groove is provided on the top of the inner wall of the inner coil 3. The first gear 92 is rotatably connected to the rotating ring 91 through a rotating shaft, and the first gear 92 is meshed with the driving tooth groove. The second gear 93 is fixedly connected to the fixed upper seat 4, and the first gear 92 is meshed with the second gear 93. The rotating seat 94 is fixedly connected to the rotating ring 91, which is located below the second gear 93 and coaxially distributed with the rotating ring 91. The rotating seat 94 is provided with a first slide groove extending radially along the kettle body 1, and a driving block 96 is slidably matched on the rotating seat 94. A telescopic rod 97 is provided at the bottom end of the driving block 96. The telescopic rod 97 slides and fits in the first slide groove, and its bottom end is fixedly connected to the first stirring plate 82. A second slide groove is provided on the driving block 96, and the second slide groove is vertically distributed. A driving rod 95 is fixedly connected to the first gear 92. The driving rod 95 is an L-shaped rod, and its bottom end extends into the second slide groove and slides with the second slide groove. When the first gear 92 rotates, the driving rod 95 rotates around the axis of the first gear 92.

[0045] When the inner coil 3 rotates, since the first gear 92 is respectively engaged with the driving tooth groove and the second gear 93, the first gear 92 revolves around the axis of the inner coil 3 driven by the inner coil 3, and the first gear 92 also rotates during the revolution. The revolution of the first gear 92 drives the rotating ring 91 to rotate around the axis of the inner coil 3, and the rotating seat 94 rotates synchronously with the rotating ring 91. The position between the rotating seat 94 and the first gear 92 remains unchanged. The rotation of the rotating seat 94 drives the driving block 96 to rotate, and the telescopic rod 97 rotates synchronously with the driving block 96, thereby pushing the first stirring plate 82 to rotate around the axis of the inner coil 3, thereby driving the sliding block 81 to move along the inner coil 3. The sliding block 81 can scrape off the materials attached to the upper and lower surfaces of the inner coil 3 during the movement. The rotation of the first gear 92 drives the driving rod 95 to rotate around the axis of the first gear 92. The rotation of the driving rod 95 drives the driving block 96 to move back and forth along the radial direction of the kettle body 1. The telescopic rod 97 moves synchronously with the driving block 96, thereby driving the first stirring plate 82 to move back and forth along the radial direction of the kettle body 1. The first stirring plate 82 drives the second stirring plate 83 to move back and forth along the radial direction of the kettle body 1 through the connecting rod 84, thereby stirring the material in the kettle body 1. When the first stirring plate 82 moves radially outwardly along the kettle body 1, the second stirring plate 83 will gradually approach the inner wall of the kettle body 1 until it stops therewith. At this time, the first stirring plate 82 continues to move outward, causing the connecting rod 84 to contract, and the second stirring plate 83 is tightly attached to the inner wall of the kettle body 1 and moves along the inner wall of the kettle body 1, so that the material attached to the inner wall of the kettle body 1 can be scraped off. When the first stirring plate 82 moves inwardly, the second stirring plate 83 is still tightly attached to the inner wall of the kettle body 1, and the connecting rod 84 gradually extends. After the connecting rod 84 returns to its natural state, the second stirring plate 83 is out of contact with the inner wall of the kettle body 1.

[0046] like Figure 6 and Figure 7 As shown, a liquid inlet annular cavity 41 is provided in the fixed upper seat 4, a liquid inlet port 42 is provided on the top of the fixed upper seat 4, the liquid inlet port 42 is communicated with the liquid inlet annular cavity 41, the liquid inlet annular cavity 41 is communicated with the inner coil 3, a liquid outlet annular cavity 51 is provided in the fixed lower seat 5, a liquid outlet port 52 is provided on the bottom of the fixed lower seat 5, the liquid outlet port 52 is communicated with the liquid outlet annular cavity 51, the liquid inlet port 42 and the liquid outlet port 52 are both communicated with the external oil tank through pipelines, and the temperature in the reactor is controlled by adjusting the input oil temperature.

[0047] The resin preparation process according to the present invention comprises the following steps:

[0048] The first step is raw material preparation, adding phenol, formaldehyde and catalyst into the kettle 1 in a certain proportion;

[0049] The second step is heating and stirring. The external oil tank introduces hot oil into the inner coil 3. The temperature in the kettle body 1 increases due to heat exchange. Then the first driving member 6 is started. The first driving member 6 drives the inner coil 3 to rotate through the driving gear 7. The inner coil 3 drives the sliding block 81 to move along the inner coil 3 through the driving mechanism. At the same time, the driving mechanism also drives the first stirring plate 82 and the second stirring plate 83 to reciprocate along the radial direction of the kettle body 1, thereby realizing the stirring of the material in the kettle body 1 and the condensation reaction between phenol and formaldehyde.

[0050] The third step is dehydration and cooling. After the reaction is completed, the material in the kettle body 1 is dehydrated. After dehydration, cold oil is introduced into the inner coil 3 from the external oil tank to cool the material and obtain a solid phenolic resin adhesive.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A reaction kettle for preparing resin, comprising: A kettle body, wherein a sealing cover is provided on the top of the kettle body; An inner coil, the inner coil being arranged in the kettle body; The invention is characterized in that a first driving member is provided on the kettle body, the first driving member is used to drive the inner coil to rotate, a stirring mechanism is provided on the inner coil, the stirring mechanism comprises a sliding block, a first stirring plate and a second stirring plate, the sliding block is slidably fitted on the inner coil, the first stirring plate and the second stirring plate are connected by a connecting rod, the connecting rod is slidably fitted on the sliding block, a driving mechanism is provided in the inner coil, and the driving mechanism is used to drive the first stirring plate and the second stirring plate to move radially along the kettle body; The bottom of the kettle body is provided with a fixed lower seat, the top of the kettle body is provided with a fixed upper seat, the inner coil is rotatably fitted between the fixed lower seat and the fixed upper seat, and the fixed upper seat and the fixed lower seat are used to fix the inner coil; The driving mechanism comprises a rotating ring, a first gear, a second gear and a rotating seat, the rotating ring rotatably cooperates with the bottom of the fixed upper seat, the top of the inner wall of the inner coil is provided with a driving tooth groove, the first gear rotatably cooperates with the rotating ring and meshes with the driving tooth groove, the second gear is fixedly connected to the rotating seat and meshes with the first gear, the rotating seat is fixedly connected to the rotating ring, the rotating seat is provided with a first slide groove, the rotating seat is slidably cooperated with a driving block, the driving block is provided with a second slide groove, the second gear is fixedly connected to a driving rod, the driving rod extends into the second slide groove, and slidably cooperates with the second slide groove, the driving block is fixedly connected with a telescopic rod, the telescopic rod slidably cooperates with the first slide groove, and the telescopic rod is connected to the first stirring plate; The top and bottom ends of the sliding block are both abutted against the inner coil, and the sliding block is provided with a first scraper and a second scraper, respectively. The first scraper abuts against the inner wall of the inner coil, and the second scraper abuts against the outer wall of the inner coil.

2. The resin preparation reaction kettle according to claim 1, characterized in that: The connecting rod is an elastic telescopic rod, and the length of the connecting rod is greater than the distance between the inner coil and the inner wall of the kettle body.

3. The resin preparation reaction kettle according to claim 2, characterized in that: The outer wall of the second stirring plate is a curved surface structure, and its curvature is the same as the curvature of the inner wall of the kettle body. The outer wall of the second stirring plate can fit with the inner wall of the kettle body.

4. The resin preparation reaction kettle according to claim 3, characterized in that: A liquid inlet annular cavity is provided in the fixed upper seat, and the liquid inlet annular cavity is communicated with the inner coil pipe. A liquid inlet is provided at the top of the fixed upper seat. A liquid outlet annular cavity is provided at the bottom of the fixed lower seat, and the liquid outlet annular cavity is communicated with the inner coil pipe. A liquid outlet is provided at the bottom of the fixed lower seat, and the liquid outlet is communicated with the liquid outlet annular cavity. Both the liquid inlet and the liquid outlet are communicated with an external oil tank.

5. A resin preparation process, applied to the resin preparation reactor according to claim 4, characterized in that: The following steps are involved: The first step is raw material preparation, adding phenol, formaldehyde and catalyst into the kettle according to the set ratio; The second step is heating and stirring. Hot oil is introduced into the inner coil. While heating, the first driving member drives the inner coil to rotate. The rotation of the inner coil drives the sliding block to slide along the inner coil through the driving mechanism, and the first stirring plate and the second stirring plate reciprocate along the radial direction of the kettle body. Under the joint action of the inner coil, the first stirring plate and the second stirring plate, the material in the kettle body is stirred to achieve a condensation reaction between phenol and formaldehyde. The third step is dehydration and cooling. After the reaction is completed, a dehydration operation is performed to remove moisture from the resin. After dehydration, cold oil is input into the inner coil to perform cooling treatment to obtain a solid phenolic resin adhesive.

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