Reaction kettle for synthesizing naphthalene sulfonic acid formaldehyde condensate

Abstract

The utility model discloses a reaction kettle for synthesizing naphthalene sulfonic acid formaldehyde condensate, and belongs to the technical field of reaction kettles. The reaction kettle for synthesizing the naphthalene sulfonic acid formaldehyde condensate comprises a kettle body, the upper end of the kettle body is fixedly connected with a driving motor, the output end of the driving motor is connected with a stirring shaft, the stirring shaft is provided with a first stirring paddle and a second stirring paddle, and the lower end of the stirring shaft is movably connected with a supporting seat; the lower end of the supporting seat is movably connected with a vortex generator. According to the reaction kettle for synthesizing the naphthalene sulfonic acid formaldehyde condensate, the first stirring paddle, the second stirring paddle and the vortex generator form a three-dimensional flow field, so that the mixing time is shortened, transmission is realized through the inner insection, the transmission gear and the central gear, the vortex generator does not need an additional motor, the energy consumption is reduced, the vortex generator accelerates formaldehyde dispersion and reduces volatilization, and the production efficiency is improved. The segmented insulating layer independently regulates the temperature, and the molecular weight distribution of the product is more uniform.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, and more specifically, to a reaction vessel for synthesizing naphthalenesulfonic acid formaldehyde condensate. Background Technology

[0002] Naphthalenesulfonic acid formaldehyde condensate is an important chemical intermediate. Its synthesis is usually carried out under acidic and high-temperature conditions, involving the condensation reaction of naphthalenesulfonic acid and formaldehyde. Traditional reaction vessels have the following problems in industrial production: conventional agitators mainly produce radial flow, which can easily create mixing dead zones for high-viscosity materials, resulting in low reaction efficiency, increased by-products, concentrated exothermic reactions, insufficient temperature control precision of traditional jackets, which can easily lead to excessive condensation or decomposition, and the tendency for formaldehyde to accumulate locally after being added dropwise, requiring an additional extension of the reaction time. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and to provide a reaction vessel for synthesizing naphthalenesulfonic acid formaldehyde condensate, thereby solving the above-mentioned deficiencies.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] The present invention relates to a reaction vessel for synthesizing naphthalenesulfonic acid formaldehyde condensate, comprising a vessel body, a drive motor fixedly connected to the upper end of the vessel body, a stirring shaft connected to the output end of the drive motor, a first stirring blade and a second stirring blade provided on the stirring shaft, a support base movably connected to the lower end of the stirring shaft, and an eddy current generator movably connected to the lower end of the support base.

[0006] Preferably, the outer surface of the reactor body is provided with a segmented insulation layer. The segmented insulation layer divides the interior into three sections: upper, middle, and lower, and each section is independently supplied with heat transfer oil. The temperature of each section is adjusted by a PLC. Through segmented temperature control, the upper section is maintained at 70-80°C to ensure that formaldehyde slowly participates in condensation and reduces side reactions caused by local overheating. The middle section jacket is maintained at 90°C, and the lower section jacket is cooled to 80°C to prevent excessive condensation.

[0007] Preferably, the support base is provided with support rods evenly distributed around its perimeter. One end of each support rod is fixedly connected to the inner wall of the vessel body. The support rods adopt a rod structure with a rhomboid cross-section, and the position of the support base is fixed by the support rods.

[0008] Preferably, the upper surface of the support base is provided with annularly distributed transmission gears, and an annular sealing groove is provided near the edge of the support base. The lower end of the stirring shaft is provided with a sealing ring that is movably connected to the annular sealing groove. The end face sealing between the support base and the stirring shaft is achieved through the cooperation of the sealing ring and the annular sealing groove.

[0009] Preferably, the lower end of the stirring shaft is provided with an orifice, and the inner wall of the orifice is provided with internal teeth, which mesh with the transmission gear.

[0010] Preferably, the eddy current generator includes a base and guide vanes, the guide vanes are arranged at equal intervals around the base, and a connecting shaft is fixedly connected to the upper surface of the base.

[0011] Preferably, the connecting shaft passes through the support base, and a central gear is fixedly connected to the connecting shaft above the support base. The central gear meshes with the transmission gear, and the stirring shaft drives the transmission gear to rotate through its internal teeth. The transmission gear, in turn, drives the central gear to rotate faster, creating a speed difference between the vortex generator and the first stirring blade.

[0012] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0013] This invention relates to a reactor for synthesizing naphthalenesulfonic acid formaldehyde condensate. The first and second stirring paddles and the vortex generator form a three-dimensional flow field, shortening the mixing time. Through internal gears, transmission gears, and a central gear, the vortex generator eliminates the need for an additional motor, reducing energy consumption. The vortex generator accelerates formaldehyde dispersion and reduces volatilization. The segmented insulation layer allows for independent temperature control, resulting in a more uniform molecular weight distribution of the product. The end face seal between the support base and the stirring shaft prevents acid leakage and extends the equipment's lifespan. The diamond-shaped structure of the support rod serves both as a guide and reinforcement, avoiding vibration risks. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the reaction vessel for synthesizing naphthalenesulfonic acid formaldehyde condensate according to the present invention;

[0015] Figure 2 This is a structural diagram showing the connection between the first and second stirring paddles of this utility model.

[0016] Figure 3 For the present utility model Figure 2 Exploded view;

[0017] Figure 4 This is a structural diagram of the eddy current generator of this utility model.

[0018] In the diagram: 1. Reactor body; 11. Drive motor; 12. Stirring shaft; 121. Internal toothed teeth; 13. Support base; 131. Support rod; 132. Transmission gear; 133. Annular sealing groove; 2. First stirring paddle; 3. Second stirring paddle; 4. Vortex generator; 41. Base; 411. Connecting shaft; 412. Central gear; 42. Guide vane; 5. Segmented insulation layer; 51. Partition. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0021] Combination Figure 1 Figure 4 The present invention relates to a reaction vessel for synthesizing naphthalenesulfonic acid formaldehyde condensate, comprising a vessel body 1, a drive motor 11 fixedly connected to the upper end of the vessel body 1, a stirring shaft 12 connected to the output end of the drive motor 11, a first stirring paddle 2 and a second stirring paddle 3 provided on the stirring shaft 12, a support base 13 movably connected to the lower end of the stirring shaft 12, and an eddy current generator 4 movably connected to the lower end of the support base 13.

[0022] Specifically, support rods 131 are evenly distributed around the support base 13. One end of the support rod 131 is fixedly connected to the inner wall of the vessel body 1. The support rod 131 adopts a rod structure with a rhomboid cross-section. The position of the support base 13 is fixed by the support rod 131, stabilizing the position of the lower end of the stirring shaft 12. The upward-moving material can be dispersed and mixed by the support rod 131.

[0023] More specifically, the upper surface of the support base 13 is provided with annularly distributed transmission gears 132, and an annular sealing groove 133 is provided near the edge of the support base 13. The lower end of the stirring shaft 12 is provided with a sealing ring that is movably connected to the annular sealing groove 133. Through the cooperation of the sealing ring and the annular sealing groove 133, the end face sealing between the support base 13 and the stirring shaft 12 is achieved.

[0024] In addition, the lower end of the stirring shaft 12 is provided with an orifice, and the inner wall of the orifice is provided with internal teeth 121. The internal teeth 121 mesh with the transmission gear 132. The vortex generator 4 includes a base 41 and guide vanes 42. The guide vanes 42 are provided at equal intervals around the base 41, and a connecting shaft 411 is fixedly connected to the upper surface of the base 41. The connecting shaft 411 passes through the support base 13, and a central gear 412 is fixedly connected to the connecting shaft 411 above the support base 13. The central gear 412 meshes with the transmission gear 132. The stirring shaft 12 drives the transmission gear 132 to rotate through the internal teeth 121, and the transmission gear 132 pushes the central gear 412 to rotate faster, so that the vortex generator 4 and the first stirring blade 2 form a speed difference.

[0025] It should be noted that in this embodiment, the first stirring paddle 2 is an inclined blade, which can enhance axial flow, and the second stirring paddle 3 is a frame-type stirring paddle, which scrapes close to the vessel wall to prevent material adhesion.

[0026] Furthermore, the exterior of the reactor body 1 is provided with a segmented insulation layer 5. The segmented insulation layer 5 divides the interior into three sections—upper, middle, and lower—through partitions 51, and each section is independently supplied with heat transfer oil. The temperature of each section is adjusted by a PLC. Through segmented temperature control, the upper section is maintained at 70–80°C to ensure that formaldehyde slowly participates in condensation and reduces side reactions caused by local overheating. The middle section jacket is maintained at 90°C, and the lower section jacket is cooled to 80°C to prevent excessive condensation.

[0027] Working process: Naphthalenesulfonic acid and catalyst are added to the reactor body 1. The drive motor 11 is started, which drives the stirring shaft 12 to rotate. The first stirring paddle 2 enhances axial flow, and the second stirring paddle 3 scrapes the reactor wall to prevent adhesion. The stirring shaft 12 drives the transmission gear 132 on the support seat 13 through the internal tooth pattern 121, which in turn meshes with the central gear 412, so that the guide vanes 42 of the vortex generator 4 rotate at a higher speed, forming a speed difference with the main stirrer. The vortex generator 4 generates an upward jet flow at the bottom of the reactor, which quickly disperses the added formaldehyde solution and avoids excessive local concentration. The upper, middle and lower sections of the segmented insulation layer 5 are independently circulated with heat transfer oil. The middle section is maintained at 90°C to promote the condensation reaction, and the lower section is cooled to 80°C to inhibit excessive reaction. The PLC adjusts the temperature of each section in real time to ensure reaction uniformity. After the reaction is completed, the product is discharged through the bottom valve.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A reaction vessel for synthesizing naphthalenesulfonic acid formaldehyde condensate, comprising a vessel body (1), characterized in that, The upper end of the vessel body (1) is fixedly connected to a drive motor (11), the output end of the drive motor (11) is connected to a stirring shaft (12), a first stirring paddle (2) and a second stirring paddle (3) are provided on the stirring shaft (12), a support base (13) is movably connected to the lower end of the stirring shaft (12), and an eddy current generator (4) is movably connected to the lower end of the support base (13).

2. The reaction vessel for synthesizing naphthalenesulfonic acid formaldehyde condensate according to claim 1, characterized in that, The outer side of the vessel body (1) is provided with a segmented heat insulation layer (5). The segmented heat insulation layer (5) divides the interior into three sections: upper, middle and lower, through partitions (51). Each section is independently supplied with heat transfer oil, and the temperature of each section is adjusted by a PLC.

3. The reaction vessel for synthesizing naphthalenesulfonic acid formaldehyde condensate according to claim 1, characterized in that, The support base (13) is provided with support rods (131) evenly distributed around its perimeter, and one end of the support rods (131) is fixedly connected to the inner wall of the vessel body (1).

4. The reaction vessel for synthesizing naphthalenesulfonic acid formaldehyde condensate according to claim 1, characterized in that, The upper surface of the support base (13) is provided with a ring-shaped distribution of transmission gears (132), and an annular sealing groove (133) is provided near the edge of the support base (13). The lower end of the stirring shaft (12) is provided with a sealing ring that is movably connected to the annular sealing groove (133).

5. The reaction vessel for synthesizing naphthalenesulfonic acid formaldehyde condensate according to claim 4, characterized in that, The lower end of the stirring shaft (12) is provided with an orifice, and the inner wall of the orifice is provided with internal teeth (121), which mesh with the transmission gear (132).

6. The reaction vessel for synthesizing naphthalenesulfonic acid formaldehyde condensate according to claim 5, characterized in that, The eddy current generator (4) includes a base (41) and guide vanes (42). Guide vanes (42) are arranged at equal intervals around the base (41), and a connecting shaft (411) is fixedly connected to the upper surface of the base (41).

7. The reaction vessel for synthesizing naphthalenesulfonic acid formaldehyde condensate according to claim 6, characterized in that, The connecting shaft (411) passes through the support base (13), and a central gear (412) is fixedly connected to the connecting shaft (411) above the support base (13). The central gear (412) meshes with the transmission gear (132).

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