CN212687931U - 2-naphthol production system - Google Patents
2-naphthol production system Download PDFInfo
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- CN212687931U CN212687931U CN202021571942.2U CN202021571942U CN212687931U CN 212687931 U CN212687931 U CN 212687931U CN 202021571942 U CN202021571942 U CN 202021571942U CN 212687931 U CN212687931 U CN 212687931U
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Abstract
The utility model discloses a 2-naphthol production system, which comprises a sulfonation device, a hydrolysis naphthalene-blowing device, a neutralization device, a filter pressing device, an alkali fusion device, an acidification device, a boiling device and a distillation device which are sequentially communicated; the alkali fusion device comprises a screw conveyer, a planetary feeder and an alkali fusion kettle which are sequentially communicated, the screw conveyer is communicated with the filter pressing device, and the alkali fusion kettle is communicated with the acidification device; the alkali fusion kettle comprises a kettle body, a heating mechanism and a stirring mechanism, wherein the upper part of the kettle body is communicated with the planetary feeder, the stirring mechanism comprises a driving part, a rotating shaft in transmission connection with the driving part and a stirring paddle arranged at the lower part of the rotating shaft, and the stirring paddle is composed of two parts which are specially designed, so that the mixing uniformity and the effective contact effect of reaction raw materials can be improved, the reaction is promoted, and the reaction process is accelerated; therefore, the system can avoid excessive side reactions, reduce the residual product of the kettle and ensure the high yield and high quality of the 2-naphthol.
Description
Technical Field
The utility model belongs to the technical field of the production of 2-naphthol, concretely relates to production system of 2-naphthol.
Background
2-Naphthol (C)10H8O) is a white flake or white powder chemical substance, which is used as an important organic raw material and is mainly used for producing dye and organic pigment intermediates, and 2-naphthol is mainly produced by the working procedures of naphthalene sulfonation, hydrolytic naphthalene blowing, sulfite neutralization, filter pressing, alkali fusion, acidification, boiling, distillation and the like; the distillation process and the alkali fusion process (mainly, the step of pressing the melted caustic soda flakes into an alkali fusion pot to react with 2-sodium naphthalene sulfonate at high temperature to generate 2-sodium naphthol and sodium sulfite) are important factors influencing the yield of 2-naphthol and the yield of distillation kettle residues, but the existing distillation device for the distillation process still has the problems that the process is difficult to control stably, the materials are easy to polymerize to produce more byproducts, the yield of 2-naphthol is reduced, and the treatment capacity and the treatment difficulty of kettle residues are increased; in the prior alkali fusion process, sodium sulfonate saltThe method mainly depends on manual intermittent feeding, and judges the reaction effect through a test means, so that the invalid reaction time of alkali fusion is prolonged, meanwhile, the reaction is difficult to rapidly and efficiently react in the reaction process, and the reason for increasing the invalid reaction time is also the reason, so that the side reactions of raw materials and intermediate products in a kettle are increased (such as the formation of 2-naphthol polymers and the like), the kettle residue is increased (the part of residues belong to dangerous wastes and have no utilization value), the product yield is insufficient, and the production cost is high; in addition, the current domestic 2-naphthol production has the problems of high energy consumption, low product yield and high impurity content of other isomers to different degrees, and the poor control of the sulfonation section is one of the reasons of the problems of low 2-naphthol yield, high side reaction ratio, unstable product quality and the like, so that the energy consumption of a device and the product quality are greatly influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming prior art's not enough, providing a production system of modified 2-naphthol, this system can promote reaction efficiency, promote the reaction process to avoid taking place too much side reaction, reduced the cauldron residual product, guaranteed 2-naphthol high output and high-quality acquisition.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a production system of 2-naphthol, the production system comprises a sulfonation device, a hydrolysis naphthalene blowing device, a neutralization device, a filter pressing device, an alkali fusion device, an acidification device, a boiling device and a distillation device which are sequentially communicated; the alkali fusion device comprises a spiral conveyor, a planetary feeder and an alkali fusion kettle which are sequentially communicated, the spiral conveyor is communicated with the filter pressing device, and the alkali fusion kettle is communicated with the acidification device; the alkali fusion kettle comprises a kettle body, a heating mechanism arranged at the lower part of the kettle body and used for heating internal materials, and a stirring mechanism arranged on the kettle body and used for stirring the internal materials, the upper part of the kettle body is communicated with the planet feeder, a discharge hole is formed at the lower part of the kettle body, the stirring mechanism comprises a driving part arranged on the kettle body, a rotating shaft in transmission connection with the driving part, and a stirring paddle arranged at the lower part of the rotating shaft, the stirring paddle comprises a first stirring part and a second stirring part which are sequentially arranged on the rotating shaft along the vertical direction, first stirring portion is the first (mixing) shaft that extends along the horizontal direction, second stirring portion is including fixed the setting is in stirring base, the setting of tip under the axis of rotation are in on the stirring base and with stirring base constitutes a plurality of second (mixing) shafts that enclose the frame structure.
According to some preferred aspects of the utility model, the stirring base includes the stirring ring and sets up a plurality of stirring branches in the stirring ring, the one end of stirring branch with the stirring ring is connected, the other end with rotation axis connection, the second (mixing) shaft with the stirring ring is connected.
According to some preferred aspects of the present invention, the stirring ring is divided into a plurality of regions having equal areas by the stirring struts, the second stirring shaft extends in the up-down direction, and the upper end surface of the second stirring shaft is higher than the upper surface of the first stirring shaft.
According to some preferred aspects of the utility model, the lower part of cauldron body is provided with discharging channel, discharging channel's one end intercommunication the inside of cauldron body, the other end form with acidizing device intercommunication the discharge gate, discharging channel extends and narrows down from the left right side downwards width from the left right side downwards.
According to some preferred aspects of the utility model, the sulfonation unit is in including the smart naphthalene metering tank that is used for storing smart naphthalene, the sulphuric acid metering tank that is used for storing sulphuric acid, setting smart naphthalene metering tank below just is used for weighing the first weighing mechanism, the setting of the total weight of smart naphthalene metering tank and inside smart naphthalene are in sulphuric acid metering tank below just is used for weighing the second weighing mechanism of the total weight of sulphuric acid metering tank and inside sulphuric acid, and respectively with smart naphthalene metering tank the sulfonation kettle of sulphuric acid metering tank intercommunication, the sulfonation kettle with the naphthalene device intercommunication is blown in the hydrolysis.
According to some preferred aspects of the utility model, the sulfonation unit still includes first communicating pipe, second communicating pipe, the both ends of first communicating pipe respectively with the lower part of smart naphthalene metering tank the upper portion intercommunication of sulfonation kettle, the both ends of second communicating pipe respectively with the lower part of sulphuric acid metering tank the upper portion intercommunication of sulfonation kettle, smart naphthalene flowmeter and first frequency conversion valve have concatenated on the first communicating pipe, sulphuric acid flowmeter and second frequency conversion valve have concatenated on the second communicating pipe.
According to some preferred aspects of the utility model, the sulfonation unit still includes control system, control system respectively with the refined naphthalene flowmeter first frequency conversion valve sulfuric acid flowmeter second frequency conversion valve, first weighing mechanism and second weighing mechanism communication connection.
According to some preferred aspects of the present invention, the distillation apparatus comprises a distillation still, a byproduct fractionation tank, a 2-naphthol finished product tank, a distillation trap, and a vacuum extractor; the distillation kettle is respectively communicated with the byproduct distillation tank and the 2-naphthol finished product tank, the byproduct distillation tank is communicated with the 2-naphthol finished product tank, the distillation catcher is respectively communicated with the byproduct distillation tank and the 2-naphthol finished product tank, and the distillation catcher is communicated with the vacuumizing unit; the distillation still comprises a distillation still body communicated with the boiling device, a jacket formed at the lower part of the distillation still body and used for storing a heat transfer medium, and a heating device arranged below the jacket and used for heating the heat transfer medium in the jacket; the byproduct fraction tank comprises a byproduct fraction tank body and a first partition plate which is arranged in the byproduct fraction tank body and is used for dividing the byproduct fraction tank body into a left part and a right part, wherein the upper part of the first partition plate is connected with the top of the interior of the byproduct fraction tank body; the 2-naphthol finished product groove comprises a finished product groove body and a second partition plate which is arranged in the finished product groove body and is used for dividing the finished product groove body into a left part and a right part, wherein the upper part of the second partition plate is connected with the top of the inside of the finished product groove body.
According to some preferred and specific aspects of the utility model, it is in to press from both sides the cover cladding on the lower part of stills body, just the upper end that presss from both sides the cover is located the middle part of stills body, it is the U type wholly to press from both sides the cover.
According to some preferred and specific aspects of the present invention, the first partition plate and the second partition plate extend in an up-down direction, respectively.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model discloses a production system has adopted specific alkali fusion device, its innovatively adopts the screw conveyer that communicates in proper order, the planet charging means combines together and then throws raw materials sulfonic acid sodium salt accurately, and can realize automatic batch and throw the raw materials, has improved reaction rate and reaction yield, simultaneously the utility model discloses still combine specific structure's rabbling mechanism, it can carry out high-efficient mixing to the material in the alkali fusion cauldron, and special design's structure can increase the effective contact between the reaction raw materials to greatly promote reaction rate and efficiency, reduced the dwell time of reaction raw materials or purpose product in the cauldron, and then reduce the side reaction for example polymerization's emergence, promote product quality and output.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a system for producing 2-naphthol according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an alkali fusion device in a production system of 2-naphthol according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a second stirring section of an alkali fusion apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a sulfonating apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a distillation apparatus according to an embodiment of the present invention;
a, a sulfonation device; B. a hydrolytic naphthalene blowing device; C. a neutralization device; D. a filter pressing device; E. an alkali fusion device; F. an acidification device; G. a boiling device; H. a distillation apparatus;
11. a screw conveyor; 12. a planetary feeder; 13. an alkali fusion kettle; 131. a kettle body; 1311. a discharge channel; 132. a heating mechanism; 1331. a drive member; 1332. a rotating shaft; 1333. a first stirring shaft; 1334. a stirring base; 13341. a stirring ring; 13342. stirring the supporting rod; 1335. a second stirring shaft;
21. a refined naphthalene measuring tank; 22. a sulfuric acid metering tank; 23. a first weighing mechanism; 24. a second weighing mechanism; 25. a sulfonation kettle; 251. a sulfonation kettle body; 2511. a discharge pipe; 252. an oil guide cavity; 26a, a first communicating pipe; 26b, a second communication pipe; 26c, a refined naphthalene flow meter; 26d, a first variable frequency valve; 26e, a sulfuric acid flow meter; 26f, a second variable frequency valve; 26g of hot oil pipeline; 26h, a cold oil pipeline; 26i and a third variable frequency valve; 26j, a fourth variable frequency valve; 27. a heat exchange pipe;
31. a distillation kettle; 311. a distillation still body; 312. a jacket; 313. a heating device; 314. a feed pipe; 32. a byproduct fractionation tank; 321. a first partition plate; 33. 2-naphthol finished product tank; 331. a second partition plate; 34. a distillation trap; 341. a conduit; 35. and (4) a vacuumizing unit.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be understood in a broad sense, e.g., they may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example (b): as shown in FIGS. 1 to 5, the present example provides a production system of 2-naphthol, which comprises a sulfonation device A, a hydrolysis naphthalene blowing device B, a neutralization device C, a pressure filtration device D, an alkali fusion device E, an acidification device F, a boiling device G and a distillation device H which are communicated in sequence. Wherein, the alkali fusion device E comprises a screw conveyer 11, a planetary feeder 12 and an alkali fusion kettle 13 which are communicated in sequence; wherein, the alkali fusion kettle 13 comprises a kettle body 131, a heating mechanism 132 arranged at the lower part of the kettle body 131 and used for heating the internal materials, a stirring mechanism arranged on the kettle body 131 and used for stirring the internal materials, the upper part of the kettle body 131 is communicated with the planetary feeder 12, the lower part of the kettle body 131 is provided with a discharge hole, the stirring mechanism comprises a driving part 1331 arranged on the kettle body 131, a rotating shaft 1332 in transmission connection with the driving part 1331, and a stirring paddle arranged at the lower part of the rotating shaft 1332, the stirring paddle comprises a first stirring part and a second stirring part which are sequentially arranged on the rotating shaft 1332 along the up-down direction, the first stirring part is a first stirring shaft 1333 extending along the horizontal direction, the second stirring section includes a stirring base 1334 fixedly provided at a lower end portion of the rotating shaft 1332, and a plurality of second stirring shafts 1335 provided on the stirring base 1334 and forming a surrounding frame structure with the stirring base 1334.
In this embodiment, the plurality of second stirring shafts 1335 and the stirring base 1334 form a barrel-like enclosure structure having a plurality of gap channels formed on the side wall or the bottom and the upper portion, which greatly improves the uniform mixing flow of the reaction raw materials inside, is beneficial to the generation of disturbance effects in different directions between the raw materials, improves effective contact, and obtains excellent reaction rate and efficiency.
In this embodiment, the second stirring shaft 1335 extends in the up-down direction, and the upper end surface of the second stirring shaft 1335 is higher than the upper surface of the first stirring shaft 1333, so as to obtain stirring effects in different directions, increase effective contact between reaction raw materials, and improve reaction rate and efficiency.
Specifically, the stirring base 1334 includes a stirring ring 13341 and a plurality of stirring struts 13342 disposed in the stirring ring 13341, one end of the stirring strut 13342 is connected to the stirring ring 13341, the other end is connected to the rotating shaft 1332, and the second stirring shaft 1335 is connected to the stirring ring 13341.
In this embodiment, the stirring struts 13342 divide the stirring ring 13341 into a plurality of regions with equal areas, which is beneficial to the force balance in all directions, thereby ensuring the stable operation of the device.
In this example, a discharge channel 1311 is provided at the lower part of the tank body 131, one end of the discharge channel 1311 is communicated with the inside of the tank body 131, the other end forms a discharge port, and the discharge channel 1311 extends in the up-down direction. Specifically, the discharging channel 1311 extends downward from left to right; further, the width of the discharging channel 1311 is narrowed from left to right to lower, which is convenient for discharging the mixed materials after reaction.
In this example, the alkali fusion device E further includes a support frame, and the kettle body 131 is arranged on the support frame; meanwhile, a temperature detection port and a pressure detection port are formed on the kettle body 131 respectively, so that the reaction condition in the kettle can be monitored at any time.
In this example, specifically, the screw conveyor 11, the planetary feeder 12 and the alkali melter 12 are sequentially arranged in the vertical direction, so that the feeding of the materials is facilitated. In this embodiment, the screw conveyor 11, the planetary feeder 12 and the heating mechanism 132 may be any devices commonly used in the art, and will not be described in detail herein.
In this example, referring to fig. 4, the sulfonating apparatus a includes a refined naphthalene measuring tank 21 for storing refined naphthalene, a sulfuric acid measuring tank 22 for storing sulfuric acid, a first weighing mechanism 23 disposed below the refined naphthalene measuring tank 21 and used for weighing the total weight of the refined naphthalene measuring tank 21 and the internal refined naphthalene, a second weighing mechanism 24 disposed below the sulfuric acid measuring tank 22 and used for weighing the total weight of the sulfuric acid measuring tank 22 and the internal sulfuric acid, and a sulfonating kettle 25 respectively communicated with the refined naphthalene measuring tank 21 and the sulfuric acid measuring tank 22; the sulfonation kettle 25 includes a sulfonation kettle body 251, an oil guide cavity 252 formed on an outer wall of the sulfonation kettle body 251, and a sulfonation kettle stirring mechanism (preferably, the sulfonation kettle stirring mechanism may be the same as the stirring mechanism in the alkali fusion device E) disposed on the sulfonation kettle body 251 and configured to stir the internal materials, wherein a discharge pipe 2511 is disposed at a lower portion of the sulfonation kettle body 251.
In this example, the sulfonating apparatus a further includes a first communicating pipe 26a and a second communicating pipe 26b, both ends of the first communicating pipe 26a are respectively communicated with the lower portion of the refined naphthalene measuring tank 21 and the upper portion of the sulfonating kettle body 251, and both ends of the second communicating pipe 26b are respectively communicated with the lower portion of the sulfuric acid measuring tank 22 and the upper portion of the sulfonating kettle body 251.
In this example, the first connection pipe 26a is connected in series to a naphthalene refining flowmeter 26c and a first variable frequency valve 26d, and the second connection pipe 26b is connected in series to a sulfuric acid flowmeter 26e and a second variable frequency valve 26 f. Further, the sulfonation device A further comprises a control system, and the control system is in communication connection with the refined naphthalene flowmeter 26c, the first variable frequency valve 26d, the sulfuric acid flowmeter 26e, the second variable frequency valve 26f, the first weighing mechanism 23 and the second weighing mechanism 24 respectively, so that the automatic control of the addition amount of the raw materials can be realized, and the misoperation caused by manual real-time observation or periodic observation can be avoided.
In this example, the sulfonating device a further includes a hot oil pipeline 26g and a cold oil pipeline 26h respectively communicated with the oil guide cavity 252, the hot oil pipeline 26g is connected in series with a third variable frequency valve 26i, the cold oil pipeline 26h is connected in series with a fourth variable frequency valve 26j, and the third variable frequency valve 26i and the fourth variable frequency valve 26j are respectively in communication connection with the control system. In the embodiment, the cold oil pipeline 26h is additionally arranged besides the hot oil pipeline 26g, so that the heat release phenomenon in the reaction process is considered, the occurrence of unnecessary side reactions or other phenomena caused by too high internal temperature of the reaction is avoided, and the cold oil is introduced through the cold oil pipeline 26h to reduce the temperature and achieve the relative balance of reaction heat release, so that the temperature in the reaction process is accurately controlled, and the yield is further improved.
In this example, the outlet 2511 is disposed in the middle of the bottom of the sulfonating kettle body 251 and passes through the oil guide cavity 252.
In this embodiment, the sulfonation kettle body 251 is further formed with a temperature detection port and a pressure detection port, respectively, so as to facilitate monitoring and mastering of the reaction condition and state in the kettle at any time.
In this embodiment, the refined naphthalene metering tank 21 of this embodiment includes a tank body and a heat exchange tube 27 disposed inside the tank body, the heat exchange tube 27 is a spiral structure and is from bottom to top, and hot fluid is introduced into the heat exchange tube 27 to keep warm for refined naphthalene.
In this example, as shown in fig. 5, the distillation apparatus H includes a distillation still 31, a byproduct fraction tank 32, a 2-naphthol finished product tank 33, a distillation trap 34, and a vacuum extractor 35; wherein, the distillation kettle 31 is respectively communicated with a byproduct fractionation tank 32 and a 2-naphthol finished product tank 33, the byproduct fractionation tank 32 is communicated with the 2-naphthol finished product tank 33, the distillation catcher 34 is respectively communicated with the byproduct fractionation tank 32 and the 2-naphthol finished product tank 33, and the distillation catcher 34 is communicated with the vacuum-pumping unit 35; the distillation still 31 comprises a distillation still body 311, a jacket 312 formed at the lower part of the distillation still body 311 and used for storing a heat transfer medium, and a heating device 313 arranged below the jacket 312 and used for heating the heat transfer medium in the jacket 312, wherein the distillation still body 311 comprises a feed inlet and a discharge outlet which are communicated with a feed pipe 314 (in this case, the feed inlet and the discharge outlet are both positioned at the upper part of the distillation still body 311); the byproduct fraction tank 32 includes a byproduct fraction tank body and a first partition plate 321 disposed in the byproduct fraction tank body and used for dividing the byproduct fraction tank body into a left part and a right part, and an upper portion of the first partition plate 321 is connected to a top portion of an inside of the byproduct fraction tank body; the 2-naphthol finished product tank 33 comprises a finished product tank body and a second partition plate 331 which is provided in the finished product tank body and is used for dividing the finished product tank body into a left part and a right part, and the upper part of the second partition plate 331 is connected with the top of the inside of the finished product tank body.
In this example, the jacket 312 covers the lower part of the distillation still body 311, and the upper end of the jacket 312 is located in the middle of the distillation still body 311; specifically, the jacket 312 of this example is U-shaped as a whole. The setting can make jacket 312 change the larger area of cladding stills body 311, and increase area of contact can make the inside temperature of cauldron more even when heating, avoids local overheated problem.
Specifically, in this example, the distillation trap 34 includes an accommodating chamber and a cooling mechanism disposed in the accommodating chamber, the top of the accommodating chamber is respectively communicated with the byproduct fractionation tank 32, the 2-naphthol finished product tank 33, and the vacuum extractor 35, the cooling mechanism includes a conduit 341 for allowing a cold fluid to flow, and the conduit 341 is curved, has at least 3 inflection points, is curved in a reciprocating manner, and is configured to collect condensed waste water or impurities.
In this example, the first partition 321 and the second partition 331 extend in the vertical direction. In this embodiment, it is preferable that the first partition plate 321 is provided between the inlet and outlet of the byproduct fractionation tank 32 itself, and the second partition plate 331 is provided between the inlet and outlet of the 2-naphthol finished product tank 33 itself, which are openings communicating with each apparatus and are provided at the top of each body, so that no matter what kind of distillate is drawn out easily during the vacuum distillation process, thereby ensuring stable operation of the apparatus.
In this embodiment, the distillation still 31 further includes a thermometer disposed on the distillation still body 311 for detecting the internal temperature and a pressure gauge disposed on the distillation still body 311 for detecting the internal pressure, so as to facilitate monitoring the distillation state inside the distillation still at any time, which is beneficial to making adjustments in time.
In this case, the desired product and the by-product were distilled off in stages and gradually distilled off according to different distillation temperatures.
To sum up, the utility model discloses a production system has adopted specific alkali to melt device E, its innovatively adopts screw conveyer 11 that communicates in proper order, planet charging means 12 combine together and then throw raw materials sulfonic acid sodium salt accurately, and can realize automatic batch throw and throw the raw materials, has improved reaction rate and reaction yield, simultaneously the utility model discloses still combine the rabbling mechanism of particular structure, it can carry out high-efficient mixing to the material in the alkali fusion cauldron 13, and special design's structure can increase the effective contact between the reaction raw materials to greatly promote reaction rate and efficiency, reduced the dwell time of reaction raw materials or purpose product in the cauldron, and then reduce the emergence of side reaction for example polymerization, promote product quality and output.
Simultaneously the utility model discloses a combine independent smart naphthalene metering bucket 21 and sulphuric acid metering bucket 22 on sulfonation kettle 25's basis, realize reinforced accurate control, simultaneously can also steadily batch nature reinforced, increase effective contact, promote reaction rate and productivity, reduce side reaction's emergence, realized sulfonation workshop section high quality and high yield.
In addition, the utility model combines the distillation still 31, the byproduct distillation groove 32, the 2-naphthol finished product groove 33, the distillation catcher 34 and the vacuumizing unit 35, thereby not only realizing negative pressure distillation, but also having fast distillation speed and easy control of the distillation process; meanwhile, the distillation kettle 31 adopts an indirect heating mode, so that a larger heating area can be obtained, the heating temperature is easier to control and uniform, the residue of the distillation kettle is reduced, and the product quality is improved; and the utility model discloses set up the division board at accessory substance fraction groove 32, 2-naphthol finished product groove 33 newly in the creation for in the negative pressure distillation process, no matter what kind of fraction can not be taken away easily (has the cushioning effect) at the in-process that gets into, ensured the steady operation of device.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. The production system of 2-naphthol is characterized by comprising a sulfonation device, a hydrolysis naphthalene blowing device, a neutralization device, a filter pressing device, an alkali fusion device, an acidification device, a boiling device and a distillation device which are sequentially communicated; the alkali fusion device comprises a spiral conveyor, a planetary feeder and an alkali fusion kettle which are sequentially communicated, the spiral conveyor is communicated with the filter pressing device, and the alkali fusion kettle is communicated with the acidification device; the alkali fusion kettle comprises a kettle body, a heating mechanism arranged at the lower part of the kettle body and used for heating internal materials, and a stirring mechanism arranged on the kettle body and used for stirring the internal materials, the upper part of the kettle body is communicated with the planet feeder, a discharge hole is formed at the lower part of the kettle body, the stirring mechanism comprises a driving part arranged on the kettle body, a rotating shaft in transmission connection with the driving part, and a stirring paddle arranged at the lower part of the rotating shaft, the stirring paddle comprises a first stirring part and a second stirring part which are sequentially arranged on the rotating shaft along the vertical direction, first stirring portion is the first (mixing) shaft that extends along the horizontal direction, second stirring portion is including fixed the setting is in stirring base, the setting of tip under the axis of rotation are in on the stirring base and with stirring base constitutes a plurality of second (mixing) shafts that enclose the frame structure.
2. The production system of 2-naphthol according to claim 1, wherein said stirring base comprises a stirring ring and a plurality of stirring struts arranged in said stirring ring, one end of said stirring strut is connected to said stirring ring, the other end is connected to said rotating shaft, and said second stirring shaft is connected to said stirring ring.
3. A 2-naphthol production system according to claim 2, wherein said plurality of stirring struts divide said stirring ring into a plurality of regions of equal area, said second stirring shaft extends in the up-down direction, and the upper end face of said second stirring shaft is higher than the upper face of said first stirring shaft.
4. The production system of 2-naphthol according to claim 1, wherein a discharge channel having one end communicating with the inside of the tank body and the other end forming the discharge port communicating with the acidifying device is provided at the lower part of the tank body, the discharge channel extending downward from left to right and narrowing in width downward from left to right.
5. The production system of 2-naphthol according to claim 1, wherein the sulfonating device comprises a refined naphthalene metering tank for storing refined naphthalene, a sulfuric acid metering tank for storing sulfuric acid, a first weighing mechanism arranged below the refined naphthalene metering tank and used for weighing the total weight of the refined naphthalene metering tank and the internal refined naphthalene, a second weighing mechanism arranged below the sulfuric acid metering tank and used for weighing the total weight of the sulfuric acid metering tank and the internal sulfuric acid, and a sulfonating kettle respectively communicated with the refined naphthalene metering tank and the sulfuric acid metering tank, and the sulfonating kettle is communicated with the hydrolysis naphthalene blowing device.
6. The production system of 2-naphthol according to claim 5, wherein the sulfonating apparatus further comprises a first communicating pipe and a second communicating pipe, both ends of the first communicating pipe are respectively communicated with the lower part of the refined naphthalene metering barrel and the upper part of the sulfonating kettle, both ends of the second communicating pipe are respectively communicated with the lower part of the sulfuric acid metering barrel and the upper part of the sulfonating kettle, the first communicating pipe is connected with a refined naphthalene flow meter and a first variable frequency valve in series, and the second communicating pipe is connected with a sulfuric acid flow meter and a second variable frequency valve in series.
7. The 2-naphthol production system of claim 6, wherein the sulfonating means further comprises a control system in communication with the fine naphthalene flow meter, the first variable frequency valve, the sulphuric acid flow meter, the second variable frequency valve, the first weighing mechanism and the second weighing mechanism, respectively.
8. The production system of 2-naphthol according to claim 1, wherein the distillation apparatus comprises a still, a by-product fraction tank, a 2-naphthol finished product tank, a distillation trap and a vacuum extractor; the distillation kettle is respectively communicated with the byproduct distillation tank and the 2-naphthol finished product tank, the byproduct distillation tank is communicated with the 2-naphthol finished product tank, the distillation catcher is respectively communicated with the byproduct distillation tank and the 2-naphthol finished product tank, and the distillation catcher is communicated with the vacuumizing unit; the distillation still comprises a distillation still body communicated with the boiling device, a jacket formed at the lower part of the distillation still body and used for storing a heat transfer medium, and a heating device arranged below the jacket and used for heating the heat transfer medium in the jacket; the byproduct fraction tank comprises a byproduct fraction tank body and a first partition plate which is arranged in the byproduct fraction tank body and is used for dividing the byproduct fraction tank body into a left part and a right part, wherein the upper part of the first partition plate is connected with the top of the interior of the byproduct fraction tank body; the 2-naphthol finished product groove comprises a finished product groove body and a second partition plate which is arranged in the finished product groove body and is used for dividing the finished product groove body into a left part and a right part, wherein the upper part of the second partition plate is connected with the top of the inside of the finished product groove body.
9. The production system of 2-naphthol according to claim 8, wherein the jacket is wrapped around the lower part of the still pot body, and the upper end of the jacket is located at the middle part of the still pot body, and the jacket is U-shaped as a whole.
10. The production system of 2-naphthol according to claim 8, wherein said first partition plate and said second partition plate extend in the up-down direction, respectively.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115054983A (en) * | 2022-07-23 | 2022-09-16 | 西安国康瑞金制药有限公司 | A concentrated filtration equipment for preparing intermediate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115054983A (en) * | 2022-07-23 | 2022-09-16 | 西安国康瑞金制药有限公司 | A concentrated filtration equipment for preparing intermediate |
| CN115054983B (en) * | 2022-07-23 | 2024-04-09 | 西安国康瑞金制药有限公司 | A concentrated filtration equipment for preparing medical intermediate |
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