An apparatus for promoting the extraction and separation of acetic anhydride by cracking acetic acid

Abstract

The application belongs to the technical field of acetic acid extraction, and particularly relates to a device for promoting acetic acid cracking and extraction separation of acetic anhydride, which comprises a tower body, a servo motor is arranged at the center of the outer wall of the top of the tower body, a water storage cylinder is fixedly connected to the output shaft of the servo motor through a coupling, a vertical pipe is fixedly connected to the outer wall of the bottom of the water storage cylinder through a flange, and the outer wall of the vertical pipe is provided with an extractant release disc group with a liquid outlet hole. The dynamic adjustment formed by the mechanical linkage structure driven by the servo motor provides hardware support for flow coordination, and the synchronous control and visual function of the double-flow adjustment mechanism optimize the adjustment accuracy and operation convenience. The combination of the two can automatically adapt to flow changes, ensure the optimal ratio of the extractant and the mixed liquid, and ensure sufficient mixing through visual observation, thereby significantly improving the extraction separation efficiency and operation stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acetic acid extraction, and particularly relates to an extraction separation device for promoting acetic acid cracking to produce acetic anhydride. BACKGROUND

[0002] Acetic acid cracking to produce acetic anhydride is an important process in the field of organic chemical industry, and one of the core links is to efficiently separate and purify the related mixed system of acetic acid, water and target product. In the process, acetic acid is used as raw material to participate in cracking reaction, and after the reaction is completed, there will be unreacted acetic acid remaining in the system, accompanied by the generation of by-product water. In the subsequent preparation process of acetic anhydride, acetic acid and water need to be effectively separated first, and then the purified acetic acid is recycled or further processed. At present, the extraction separation technology is commonly used in industry to separate acetic acid and water, and the principle is to use the high selectivity of the extractant to the solubility characteristics of acetic acid to make acetic acid transfer from the water phase to the extractant phase, and then to realize the separation of the extraction phase (containing acetic acid extractant) and the raffinate phase (water) through separation equipment, thereby completing the recovery of acetic acid and the purification of water.

[0003] However, the existing extraction separation technology for acetic acid cracking to produce acetic anhydride has some deficiencies in actual application.

[0004] The existing device cannot automatically and synchronously adjust the amount of mixed solution of acetic acid and water according to the flow change of the extractant. When the flow of the extractant fluctuates, the proportion of the two phases is easy to be unbalanced, thereby affecting the extraction efficiency. Moreover, the device cannot realize the centralized mixing of acetic acid, water and extractant in a certain specific area according to the water pressure difference caused by the flow change, and it is also difficult to intuitively understand the reaction between the media inside the tower body, so that the mixing time is prolonged and the problem of insufficient mixing is easy to occur. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides an extraction separation device for promoting acetic acid cracking to produce acetic anhydride, which overcomes the deficiencies of the prior art and effectively solves the problems of lack of flow coordination adjustment mechanism, insufficient mixing and inability to intuitively understand the reaction inside the tower body.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] An extraction separation device for promoting acetic acid cracking to produce acetic anhydride, comprising a tower body, a servo motor is arranged at the center of the outer wall at the top of the tower body, and a water storage cylinder is fixedly connected to the output shaft of the servo motor through a shaft coupling, a vertical pipe is fixedly connected to the bottom outer wall of the water storage cylinder through a flange, and an extractant release disc set with liquid outlet holes is arranged on the outer wall of the vertical pipe, a mixed liquid collecting ring, a mixed liquid dividing pipe and a mixed liquid jet pipe are arranged around the outside of the vertical pipe, and the mixed liquid collecting ring, the mixed liquid dividing pipe and the mixed liquid jet pipe are sequentially communicated in order.

[0008] The top of the outer wall of the vertical pipe is rotationally connected with an extractant collecting cover, and the outer wall of the extractant collecting cover and the outer wall of one side of the mixed liquid collecting ring are respectively welded with a first extractant inlet pipe and a first mixed liquid inlet pipe, a double-flow adjusting mechanism is arranged between the first extractant inlet pipe and the first mixed liquid inlet pipe, the double-flow adjusting mechanism comprises a sleeve, an end sleeve, a sealing cover, a flow synchronous adjusting seat and a multi-stage separation observation assembly, the sealing cover is welded to the sleeve and the end sleeve, the flow synchronous adjusting seat is arranged in the interior of the sleeve, and the multi-stage separation observation assembly is welded to the outer wall of one end of the flow synchronous adjusting seat.

[0009] Preferably, the double-flow adjusting mechanism further comprises a first sealing plate, a second sealing plate and a partition plate, the first sealing plate and the second sealing plate are both welded to the inner wall of the sleeve, and the partition plate comprises two partition plates which are arranged on one side of the first sealing plate and the second sealing plate respectively.

[0010] Preferably, the flow synchronous adjusting seat comprises a connecting rod, an extractant blocking head and a mixed liquid blocking head, the connecting rod is slidingly connected to the inner wall of the partition plate, the extractant blocking head is installed to the outer wall of one end of the connecting rod, the mixed liquid blocking head is installed to the outer wall of the other end of the connecting rod, the extractant blocking head and the mixed liquid blocking head are tightly attached to the inner wall of the first sealing plate and the second sealing plate respectively, and a spring is fixedly connected between the extractant blocking head and the partition plate close to the second sealing plate.

[0011] Preferably, the multi-stage separation observation assembly comprises a water flushing sleeve, a first-stage separation display ring, a second-stage separation display ring and a third-stage separation display ring, the water flushing sleeve is welded to the outer wall of one end of the connecting rod, the first-stage separation display ring, the second-stage separation display ring and the third-stage separation display ring are sequentially arranged on the outer wall of the water flushing sleeve in sequence, and the first-stage separation display ring, the second-stage separation display ring and the third-stage separation display ring are tightly attached to the inner wall of the sealing cover, a transparent observation port is arranged on the outer wall of one side of the sealing cover, and the first-stage separation display ring is close to one side of the transparent observation port.

[0012] Preferably, the interior of the sleeve is sequentially provided with an extractant inlet chamber, an extractant discharge chamber, a mixed liquid inlet chamber and a mixed liquid discharge chamber, the first extractant inlet pipe is communicated with the interior of the extractant discharge chamber, the first mixed liquid inlet pipe is communicated with the interior of the mixed liquid discharge chamber, a second extractant inlet pipe is communicated with the inner wall of the extractant inlet chamber, a second mixed liquid inlet pipe is communicated with the inner wall of the mixed liquid inlet chamber, and an extractant flushing pipe is fixedly connected to the outer wall of one side of the end sleeve and communicated with the second extractant inlet pipe.

[0013] Preferably, the inside of the water storage cylinder and the stand pipe is provided with an active lifting rod, and the outer wall of the top of the active lifting rod is fixedly connected with a floating plate, the outer wall of the active lifting rod is fixedly connected with a first flow guide plate inside the stand pipe, the outer wall of the bottom of the active lifting rod is fixedly connected with passive lifting rods distributed at equal distances, and the passive lifting rods are slidingly connected to the inner wall of the mixed liquid shunt pipe, and the outer wall of the top of the mixed liquid shunt pipe is fixedly connected with a second flow guide plate.

[0014] Preferably, the extractant release disc set comprises, from top to bottom, a first extractant release disc, a second extractant release disc and a third extractant release disc, wherein the first extractant release disc, the second extractant release disc and the third extractant release disc correspond one-to-one to the first separation display ring, the second separation display ring and the third separation display ring.

[0015] The inner wall of the tower body is welded with fixed rings distributed at equal distances outside the extractant release disc set, and the mixed liquid shunt pipe is located between the fixed rings and the extractant release disc set.

[0016] Preferably, the top of the inner wall of the tower body is respectively provided with first partition plates and second partition plates distributed adjacently, the first partition plates are filled with first fillers, and the second partition plates are filled with second fillers, the outer wall of the bottom of the tower body is fixedly connected with an acetic acid discharge pipe, the outer wall of one side of the tower body is fixedly connected with a drain pipe between the first fillers and the second fillers, the outer wall of one side of the tower body is fixedly connected with an ethyl acetate discharge pipe above the second fillers, and the water storage cylinder is arranged to penetrate through the inner walls of the first partition plates, the first fillers, the second partition plates and the second fillers.

[0017] Preferably, the top of the outer wall of the stand pipe is provided with extractant converging holes distributed at equal distances inside the extractant collector, and the outer wall of the stand pipe is provided with extractant diverging holes distributed at equal distances inside the extractant release disc set, the outer wall of the stand pipe is fixedly connected with a top clamping sleeve and a bottom clamping sleeve through screws, and the extractant release disc set is fixedly connected between the top clamping sleeve and the bottom clamping sleeve through screws.

[0018] Preferably, the inside of the tower body is respectively provided with an acetic acid settling zone, a mixing zone and a separation zone for separating ethyl acetate and water from bottom to top, wherein the extractant release disc set, the mixed liquid injection pipe and the fixed ring are located inside the mixing zone, and the first partition plates, the first fillers, the second partition plates and the second fillers are located inside the separation zone.

[0019] The outer wall of the top of the tower body is fixedly connected with a motor seat through a screw in the center, and the servo motor is fixedly connected to the inner wall of the motor seat through a screw, and the bottom and the top of the outer wall of one side of the tower body are provided with observation tubes.

[0020] The beneficial effects of the present application are:

[0021] 1. The device for promoting the extraction and separation of acetic anhydride produced by acetic acid cracking, through the linkage structure of the servo motor, water storage cylinder, vertical pipe, active lifting rod, floating plate, first guide plate, passive lifting rod, mixed liquid shunt pipe and second guide plate, the water pressure change caused by the entering amount of the extractant can be used to adjust the positions of the first guide plate and the second guide plate in real time, optimize the contact path of the extractant and the mixed liquid, improve the uniformity of the preliminary mixing of the two, and at the same time avoid local mixing imbalance caused by flow fluctuation;

[0022] 2. The device for promoting the extraction and separation of acetic anhydride produced by acetic acid cracking, under the action of the double-flow adjusting mechanism, through the linkage of the flow synchronous adjusting seat and the spring, the synchronous adjustment of the extractant and the mixed liquid flow is realized, the problem of two-phase ratio imbalance is solved, and the water flushing sleeve of the multi-stage separation observation assembly displaces with the water pressure, which can drive the display rings at the transparent observation port to appear, so that the mixed reaction area under different flows in the tower body can be intuitively reflected, the operating personnel can master the working condition in real time, and the insufficient mixing condition is reduced;

[0023] 3. The device for promoting the extraction and separation of acetic anhydride produced by acetic acid cracking, the dynamic adjustment formed by the mechanical linkage structure driven by the servo motor provides hardware support for flow coordination, and the synchronous control and visualization function of the double-flow adjusting mechanism optimizes the adjustment precision and operation convenience, the combination of the two can not only automatically adapt to the flow change to ensure the best ratio of the extractant and the mixed liquid, but also ensure sufficient mixing through visual observation, which significantly improves the extraction and separation efficiency and operation stability. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The overall structure of the device for promoting the extraction and separation of acetic anhydride produced by acetic acid cracking is proposed Figure 1 ;

[0025] Figure 2 The overall structure of the device for promoting the extraction and separation of acetic anhydride produced by acetic acid cracking is proposed Figure 2 ;

[0026] Figure 3 The internal structure of the tower body of the device for promoting the extraction and separation of acetic anhydride produced by acetic acid cracking is proposed

[0027] Figure 4 The servo motor connection structure of the device for promoting the extraction and separation of acetic anhydride produced by acetic acid cracking is proposed

[0028] Figure 5 The internal structure of the water storage cylinder and the vertical pipe of the device for promoting the extraction and separation of acetic anhydride produced by acetic acid cracking is proposed

[0029] Figure 6An extraction agent release disc group, top sleeve and bottom sleeve separation structure schematic diagram of an extraction separation device for promoting acetic acid cracking for acetic anhydride extraction is proposed in the present application;

[0030] Figure 7 An enlarged schematic diagram of the A part structure of Figure 5 ;

[0031] Figure 8 An enlarged schematic diagram of the B part structure of Figure 5 ;

[0032] Figure 9 A double flow regulation mechanism schematic diagram of an extraction separation device for promoting acetic acid cracking for acetic anhydride extraction is proposed in the present application;

[0033] Figure 10 A sealing cover internal structure schematic diagram based on Figure 9 ;

[0034] Figure 11 A sleeve and end sleeve internal structure schematic diagram based on Figure 10 ;

[0035] Figure 12 A flow synchronous regulation seat and multi-stage separation observation component structure schematic diagram based on Figure 11 .

[0036] In the figure: 1, tower body; 2, servo motor; 3, water storage cylinder; 4, vertical pipe; 5, extractant release disc group; 6, mixed liquid collecting ring; 7, mixed liquid distribution pipe; 8, mixed liquid spray pipe; 9, active lifting rod; 10, floating plate; 11, passive lifting rod; 12, second guide plate; 13, extractant collecting cover; 14, first extractant inlet pipe; 15, first mixed liquid inlet pipe; 16, double flow regulating mechanism; 161, sleeve; 162, end sleeve; 163, sealing cover; 164, first sealing plate; 165, second sealing plate; 166, partition plate; 167, flow synchronizing regulating seat; 168, spring; 169, multi-stage separation observation assembly; 17, extractant flush pipe; 18, second mixed liquid inlet pipe; 19, fixed ring; 20, first stage partition plate; 21, first stage filler; 22, second stage partition plate; 23, second stage filler; 24, acetic acid discharge pipe; 25, drain pipe; 26, ethyl acetate discharge pipe; 27, motor base; 28, observation pipe; 29, extractant converging hole; 30, extractant diverging hole; 31, top collar; 32, bottom collar; 33, mixing zone; 34, acetic acid settling zone; 35, separation zone; 36, extractant inlet chamber; 37, extractant discharge chamber; 38, mixed liquid inlet chamber; 39, mixed liquid discharge chamber; 40, connecting rod; 41, extractant block head; 42, mixed liquid block head; 43, water flush sleeve; 44, first stage separation display ring; 45, second stage separation display ring; 46, third stage separation display ring; 47, transparent observation port; 48, second extractant inlet pipe; 49, first guide plate. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0038] Reference Figures 1-12 , embodiment one, an extractive separation device for promoting acetic acid cracking to produce acetic anhydride, comprising a tower body 1, a servo motor 2 is arranged at the center of the outer wall of the top of the tower body 1, and the output shaft of the servo motor 2 is fixedly connected with a water storage cylinder 3 through a shaft coupling, the bottom outer wall of the water storage cylinder 3 is fixedly connected with a vertical pipe 4 through a flange, and the outer wall of the vertical pipe 4 is provided with an extractant release disc group 5 with a liquid outlet hole, the periphery of the outside of the vertical pipe 4 is respectively provided with a mixed liquid collecting ring 6, a mixed liquid distribution pipe 7 and a mixed liquid spray pipe 8, and the mixed liquid collecting ring 6, the mixed liquid distribution pipe 7 and the mixed liquid spray pipe 8 are sequentially communicated in order.

[0039] Through the above scheme, the servo motor 2 provides rotating power for the water storage cylinder 3 and the vertical pipe 4, the liquid outlet hole of the extractant release disc set 5 is designed to facilitate uniform release of the extractant, the mixed liquid collecting ring 6, the mixed liquid distributing pipe 7 and the mixed liquid spray pipe 8 are sequentially connected, which builds a complete channel for the mixed liquid from collection, distribution to spraying, lays a structural foundation for the subsequent full contact between the extractant and the mixed liquid, and ensures that the mixed liquid can be accurately delivered to the area where the extractant reacts.

[0040] In the second embodiment, the top of the outer wall of the vertical pipe 4 is rotatably connected with an extractant collecting cover 13, and the outer wall of one side of the extractant collecting cover 13 and the mixed liquid collecting ring 6 is respectively welded with a first extractant inlet pipe 14 and a first mixed liquid inlet pipe 15, a double-flow adjusting mechanism 16 is arranged between the first extractant inlet pipe 14 and the first mixed liquid inlet pipe 15, the double-flow adjusting mechanism 16 includes a sleeve 161, an end sleeve 162, a sealing cover 163, a flow synchronous adjusting seat 167 and a multi-stage separation observation assembly 169, the sealing cover 163 is welded to the sleeve 161 and the end sleeve 162, the flow synchronous adjusting seat 167 is arranged inside the sleeve 161, the multi-stage separation observation assembly 169 is welded to the outer wall of one end of the flow synchronous adjusting seat 167, the double-flow adjusting mechanism 16 further includes a first sealing plate 164, a second sealing plate 165 and a partition plate 166, the first sealing plate 164 and the second sealing plate 165 are both welded to the inner wall of the sleeve 161, and the partition plate 166 includes two partition plates, and the two partition plates 166 are respectively arranged on one side of the first sealing plate 164 and the second sealing plate 165.

[0041] Through the above scheme, the extractant collecting cover 13 is rotatably connected with the vertical pipe 4, which ensures that the extractant can still enter stably when the vertical pipe 4 rotates, the first extractant inlet pipe 14 and the first mixed liquid inlet pipe 15 respectively provide a delivery channel for the extractant and the mixed liquid, in the double-flow adjusting mechanism 16, the sleeve 161, the end sleeve 162 and the sealing cover 163 form a closed adjusting space to avoid fluid leakage; the first sealing plate 164, the second sealing plate 165 and the two partition plates 166 divide the inside of the sleeve 161 into independent compartments, realizing the flow adjustment of the extractant and the mixed liquid; through the cooperation of the flow synchronous adjusting seat 167 and the multi-stage separation observation assembly 169, the stability and controllability of the device operation are improved.

[0042] The embodiment three, the inside of the water storage cylinder 3 and the stand pipe 4 is provided with a driven lifting rod 9, and the outer wall of the top of the driven lifting rod 9 is fixedly connected with a floating plate 10, the outer wall of the driven lifting rod 9 is fixedly connected with a first flow guide plate 49 in the inside of the stand pipe 4, the outer wall of the bottom of the driven lifting rod 9 is fixedly connected with passive lifting rods 11 which are distributed at equal distances, and the passive lifting rods 11 are slidingly connected to the inner wall of the mixed liquid shunt pipe 7, and the outer wall of the top of the mixed liquid shunt pipe 7 is fixedly connected with a second flow guide plate 12.

[0043] Through the above scheme, the floating plate 10 controls the initial position and lifting state of the driven lifting rod 9 by using the buoyancy of water, the movement of the driven lifting rod 9 drives the first flow guide plate 49 to adjust the position in the stand pipe 4, so as to change the flow position of the extractant in the stand pipe 4 and optimize the distribution of the extractant; the sliding cooperation of the passive lifting rods 11 and the mixed liquid shunt pipe 7 enables the driven lifting rod 9 to synchronously drive the second flow guide plate 12 to move, and the second flow guide plate 12 can adjust the flow state of the mixed liquid in the mixed liquid shunt pipe 7, so as to realize the cooperative adjustment of the flow states of the extractant and the mixed liquid and further improve the uniformity of the mixture of the two.

[0044] The flow synchronous adjustment seat 167 includes a connecting rod 40, an extractant blocking head 41 and a mixed liquid blocking head 42, wherein the connecting rod 40 is slidingly connected to the inner wall of the partition plate 166, the extractant blocking head 41 is installed on the outer wall of one end of the connecting rod 40, and the mixed liquid blocking head 42 is installed on the outer wall of the other end of the connecting rod 40, wherein the extractant blocking head 41 and the mixed liquid blocking head 42 are tightly attached to the inner walls of the first sealing plate 164 and the second sealing plate 165 respectively, and the extractant blocking head 41 and the partition plate 166 close to the second sealing plate 165 are fixedly connected with a spring 168.

[0045] Through the above scheme, the sliding of the connecting rod 40 in the partition plate 166 provides support for the linkage of the extractant blocking head 41 and the mixed liquid blocking head 42; through the close attachment of the extractant blocking head 41 and the first sealing plate 164 and the mixed liquid blocking head 42 and the second sealing plate 165, the effective blocking and opening and closing control of the extractant and mixed liquid channels are realized; the elastic action of the spring 168 enables the extractant blocking head 41 and the mixed liquid blocking head 42 to automatically adjust the position according to the fluid pressure, so as to change the flow area of the channel, realize the synchronous and dynamic adjustment of the flow of the extractant and the mixed liquid, and ensure that the proportion of the two is always in the best extraction state.

[0046] The multi-stage separation observation assembly 169 comprises a water flushing sleeve 43, a first-stage separation display ring 44, a second-stage separation display ring 45 and a third-stage separation display ring 46, wherein the water flushing sleeve 43 is welded to the outer wall of one end of the connecting rod 40, the first-stage separation display ring 44, the second-stage separation display ring 45 and the third-stage separation display ring 46 are sequentially arranged on the outer wall of the water flushing sleeve 43, and the first-stage separation display ring 44, the second-stage separation display ring 45 and the third-stage separation display ring 46 are tightly attached to the inner wall of the sealing cover 163, the outer wall of one side of the sealing cover 163 is provided with a transparent observation port 47, and the first-stage separation display ring 44 is close to one side of the transparent observation port 47.

[0047] Through the above scheme, the fixed connection of the water flushing sleeve 43 and the connecting rod 40 enables the displacement of the connecting rod 40 to synchronously drive the water flushing sleeve 43 to move; the first-stage separation display ring 44, the second-stage separation display ring 45 and the third-stage separation display ring 46 move in the sealing cover 163 along with the displacement of the water flushing sleeve 43, and the transparent observation port 47 provides a window for the operator to observe the positions of the first-stage separation display ring 44, the second-stage separation display ring 45 and the third-stage separation display ring 46. According to the appearance of the first-stage separation display ring 44, the second-stage separation display ring 45 and the third-stage separation display ring 46 at the transparent observation port 47, the flow rates of the extractant and the mixed liquid and the corresponding regions can be directly judged, so that the operation parameters can be timely adjusted to ensure the stable and efficient reaction in the tower body 1.

[0048] The inner part of the sleeve 161 is sequentially provided with an extractant entering chamber 36, an extractant discharging chamber 37, a mixed liquid entering chamber 38 and a mixed liquid discharging chamber 39, wherein the first extractant inlet pipe 14 is communicated with the inner part of the extractant discharging chamber 37, the first mixed liquid inlet pipe 15 is communicated with the inner part of the mixed liquid discharging chamber 39, the second extractant inlet pipe 48 is communicated with the inner wall of the extractant entering chamber 36, and the second mixed liquid inlet pipe 18 is communicated with the inner wall of the mixed liquid entering chamber 38, and the outer wall of one side of the end sleeve 162 is fixedly connected with the extractant flushing pipe 17, and the extractant flushing pipe 17 and the second extractant inlet pipe 48 are communicated with each other.

[0049] Through the above scheme, the orderly arrangement of the chambers in the sleeve 161 realizes the independent conveying and temporary storage of the extractant and the mixed liquid in the device, avoiding the mixing of the two before adjustment; the communication between the second extractant inlet pipe 48 and the extractant flushing pipe 17 provides a stable entering channel for the extractant, ensuring that the extractant can smoothly enter the extractant entering chamber 36, and a complete fluid conveying path is constructed to ensure that the extractant and the mixed liquid can enter the subsequent reaction link according to the predetermined process.

[0050] The extraction agent release disc set 5 includes a first extraction agent release disc, a second extraction agent release disc and a third extraction agent release disc distributed in sequence from top to bottom, wherein the first extraction agent release disc, the second extraction agent release disc and the third extraction agent release disc correspond one-to-one with the first separation display ring 44, the second separation display ring 45 and the third separation display ring 46.

[0051] Through the above scheme, the design of the extraction agent release disc set 5 increases the sense of hierarchy and coverage of the extraction agent release; the one-to-one correspondence between the first extraction agent release disc, the second extraction agent release disc and the third extraction agent release disc and the first separation display ring 44, the second separation display ring 45 and the third separation display ring 46 enables the operator to accurately judge the release level of the extraction agent and the corresponding area according to the display of the separation display ring at the transparent observation port 47, and facilitates the adjustment of the release amount and release position of the extraction agent according to the actual working condition, thereby improving the contact efficiency of the extraction agent and the mixed liquid.

[0052] The inner wall of the tower body 1 is welded with fixed rings 19 distributed at equal distances outside the extraction agent release disc set 5, and the mixed liquid distribution pipe 7 is located between the fixed rings 19 and the extraction agent release disc set 5.

[0053] Through the above scheme, the mixed liquid distribution pipe 7 is located between the fixed rings 19 and the extraction agent release disc set 5, which ensures that the mixed liquid sprayed from the mixed liquid distribution pipe 7 can quickly contact and mix with the extraction agent released by the extraction agent release disc set 5, shortens the mixing path, reduces the mixing time, and improves the mixing sufficiency.

[0054] The top of the inner wall of the tower body 1 is respectively provided with adjacent first partitions 20 and adjacent second partitions 22, the two first partitions 20 are filled with first fillers 21, and the two second partitions 22 are filled with second fillers 23, the outer wall of the bottom of the tower body 1 is fixedly connected with an acetic acid discharge pipe 24, the outer wall of one side of the tower body 1 is fixedly connected with a drain pipe 25 between the first fillers 21 and the second fillers 23, and the outer wall of one side of the tower body 1 is fixedly connected with an ethyl acetate discharge pipe 26 above the second fillers 23, wherein the water storage cylinder 3 is throughly arranged on the inner walls of the first partitions 20, the first fillers 21, the second partitions 22 and the second fillers 23.

[0055] Through the above scheme, the first partitions 20 and the second partitions 22 provide support and installation basis for the first fillers 21 and the second fillers 23, respectively, the filling of the fillers increases the contact area and residence time of the fluid in the separation zone 35, thereby improving the separation effect; the arrangement of the acetic acid discharge pipe 24, the drain pipe 25 and the ethyl acetate discharge pipe 26 respectively provides independent discharge channels for the acetic acid, water and ethyl acetate generated by the reaction, thereby realizing effective separation and collection of the three substances; the through arrangement of the water storage cylinder 3 ensures that it does not affect the normal work of the separation zone 35 when rotating.

[0056] The top of the outer wall of the vertical pipe 4 is provided with equidistantly distributed extractant converging holes 29 inside the extractant collecting cover 13, and the outer wall of the vertical pipe 4 is provided with equidistantly distributed extractant diverging holes 30 inside the extractant release disc set 5, the outer wall of the vertical pipe 4 is fixedly connected with a top sleeve 31 and a bottom sleeve 32 by screws respectively, and the extractant release disc set 5 is fixedly connected between the top sleeve 31 and the bottom sleeve 32 by screws.

[0057] Through the above scheme, the extractant converging holes 29 facilitate the rapid convergence of the extractant in the extractant collecting cover 13 into the vertical pipe 4, and the extractant diverging holes 30 make the extractant in the vertical pipe 4 uniformly diverge to the extractant release disc set 5; the top sleeve 31 and the bottom sleeve 32 are fixed on the vertical pipe 4 by screws, which provides a stable mounting structure for the extractant release disc set 5.

[0058] The tower body 1 is provided with an acetic acid settling zone 34, a mixing zone 33 and a separation zone 35 for separating ethyl acetate and water from bottom to top inside the tower body 1, wherein the extractant release disc set 5, the mixed liquid spray pipe 8 and the fixed ring 19 are located inside the mixing zone 33, and the first partition 20, the first filler 21, the second partition 22 and the second filler 23 are located inside the separation zone 35.

[0059] Through the above scheme, the extractant release disc set 5, the mixed liquid spray pipe 8 and other components in the mixing zone 33 ensure that the extractant and the mixed liquid are fully mixed and reacted; the separation zone 35 realizes efficient separation of the reaction products; and the acetic acid settling zone 34 uses the density difference to make the acetic acid naturally settle, thereby improving the overall extraction and separation efficiency of the device.

[0060] The motor seat 27 is fixedly connected to the center of the outer wall of the top of the tower body 1 by screws, and the servo motor 2 is fixedly connected to the inner wall of the motor seat 27 by screws, and the bottom and the top of the outer wall of one side of the tower body 1 are provided with observation tubes 28.

[0061] Through the above scheme, the motor seat 27 provides a stable mounting basis for the servo motor 2, and the observation tubes 28 are provided to facilitate the operator to observe the reaction conditions at different heights inside the tower body 1 from the outside of the tower body 1.

[0062] Working principle: when the device is started, the extractant enters the end sleeve 162 through the extractant impact pipe 17, and under the action of water pressure, the connecting rod 40 of the flow synchronous adjusting seat 167 is moved, and then the extractant blocking head 41 and the mixed liquid blocking head 42 are synchronously adjusted in position to realize the coordinated adjustment of the flow of the extractant and the mixed liquid. At the same time, the extractant enters the extractant entering bin 36 through the second extractant inlet pipe 48, and then flows into the extractant collecting cover 13 through the extractant discharging bin 37 and the first extractant inlet pipe 14, and then enters the vertical pipe 4 through the extractant converging hole 29; the mixed solution of acetic acid and water enters the mixed liquid entering bin 38 through the second mixed liquid inlet pipe 18, and then flows into the mixed liquid collecting ring 6 through the mixed liquid discharging bin 39 and the first mixed liquid inlet pipe 15.

[0063] After the extractant enters the vertical pipe 4, the first guide plate 49 is pushed to move downward, the floating plate 10 is lowered with the driving lifting rod 9, and then the second guide plate 12 is pulled to move downward synchronously with the passive lifting rod 11, and the positions of the two are optimized according to the change of water pressure. The extractant in the vertical pipe 4 enters the extractant release disc set 5 through the extractant diverging hole 30 and is released upward by the first, second and third extractant release discs; the mixed liquid is sprayed downward from the mixed liquid spray pipe 8 through the mixed liquid diverging pipe 7 and contacts with the extractant in the mixing area 33;

[0064] In this process, when the extractant impact pipe 17 impacts the water impact sleeve 43, the greater the water pressure, the greater the displacement of the water impact sleeve 43, and the greater the flow of the mixed solution of the extractant, acetic acid and water. The first, second and third separation display rings 44, 45 and 46 on the surface of the water impact sleeve 43 can be selectively transferred to the transparent observation port 47 according to the displacement of the water impact sleeve 43, which forms the phenomenon that: when the flow is small, the first separation display ring 44 is transferred to the transparent observation port 47, and the mixed solution of the extractant, acetic acid and water will be concentrated near the first extractant release disc for reaction; when the flow is medium, the second separation display ring 45 is transferred to the transparent observation port 47, and the mixed solution of the extractant, acetic acid and water will be concentrated near the first and second extractant release discs for reaction; when the flow is large, the third separation display ring 46 is transferred to the transparent observation port 47, and the mixed solution of the extractant, acetic acid and water will be concentrated near the first, second and third extractant release discs for reaction. The operator can intuitively judge the matching state of the internal reaction area and the flow by observing the display rings near the transparent observation port 47.

[0065] The servo motor 2 is fixed by the motor base 27, drives the water storage cylinder 3 and the vertical pipe 4 to rotate, so that the mixed liquid and the extractant are fully mixed to generate ethyl acetate. Due to the density difference, the acetic acid sinks in the acetic acid settling area 34, is discharged through the acetic acid discharge pipe 24; the water flows upward, passes through the first-stage partition plate 20 and the first-stage filler 21 of the separation area 35, and is discharged from the water discharge pipe 25; the ethyl acetate continues to rise, passes through the second-stage partition plate 22 and the second-stage filler 23, and is discharged from the ethyl acetate discharge pipe 26, so that the whole extraction and separation process is completed.

[0066] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical solution and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A device for facilitating the extraction and separation of acetic anhydride from acetic acid cleavage, comprising a tower body (1), characterized in that, The outer wall center of the top of the tower body (1) is provided with a servo motor (2), and the output shaft of the servo motor (2) is fixedly connected with a water storage cylinder (3) through a shaft coupling. The outer wall of the bottom of the water storage cylinder (3) is fixedly connected with a vertical pipe (4) through a flange, and the outer wall of the vertical pipe (4) is provided with an extractant release disc group (5) with a liquid outlet hole. The periphery of the outside of the vertical pipe (4) is respectively provided with a mixed liquid collecting ring (6), a mixed liquid shunt pipe (7) and a mixed liquid jet pipe (8), and the mixed liquid collecting ring (6), the mixed liquid shunt pipe (7) and the mixed liquid jet pipe (8) are sequentially communicated in order; The outer wall of the top of the vertical pipe (4) is rotatably connected with an extractant collecting cover (13), and the outer wall of one side of the extractant collecting cover (13) and the mixed liquid collecting ring (6) is respectively welded with a first extractant inlet pipe (14) and a first mixed liquid inlet pipe (15). A double-flow adjusting mechanism (16) is arranged between the first extractant inlet pipe (14) and the first mixed liquid inlet pipe (15). The double-flow adjusting mechanism (16) comprises a sleeve (161), an end sleeve (162), a sealing cover (163), a flow synchronous adjusting seat (167) and a multi-stage separation observation assembly (169). The sealing cover (163) is welded to the sleeve (161) and the end sleeve (162). The flow synchronous adjusting seat (167) is arranged in the inside of the sleeve (161). The multi-stage separation observation assembly (169) is welded to the outer wall of one end of the flow synchronous adjusting seat (167). The double-flow adjusting mechanism (16) further comprises a first sealing plate (164), a second sealing plate (165) and a partition plate (166). The first sealing plate (164) and the second sealing plate (165) are both welded to the inner wall of the sleeve (161). The partition plate (166) comprises two, and the two partition plates (166) are respectively arranged on one side of the first sealing plate (164) and the second sealing plate (165). The flow synchronous adjusting seat (167) comprises a connecting rod (40), an extractant blocking head (41) and a mixed liquid blocking head (42). The connecting rod (40) is slidably connected to the inner wall of the partition plate (166). The extractant blocking head (41) is installed on the outer wall of one end of the connecting rod (40). The mixed liquid blocking head (42) is installed on the outer wall of the other end of the connecting rod (40). The extractant blocking head (41) and the mixed liquid blocking head (42) are respectively tightly attached to the inner walls of the first sealing plate (164) and the second sealing plate (165). The spring (168) is fixedly connected between the extractant blocking head (41) and the partition plate (166) close to the second sealing plate (165). The multi-stage separation observation assembly (169) comprises a water flushing sleeve (43), a first-stage separation display ring (44), a second-stage separation display ring (45) and a third-stage separation display ring (46), wherein the water flushing sleeve (43) is welded to the outer wall of one end of the connecting rod (40), the first-stage separation display ring (44), the second-stage separation display ring (45) and the third-stage separation display ring (46) are sequentially arranged on the outer wall of the water flushing sleeve (43) in sequence, and the first-stage separation display ring (44), the second-stage separation display ring (45) and the third-stage separation display ring (46) are tightly attached to the inner wall of the sealing cover (163), the outer wall of one side of the sealing cover (163) is provided with a transparent observation port (47), and the first-stage separation display ring (44) is located on the side close to the transparent observation port (47).

2. The device for facilitating the extraction and separation of acetic anhydride from acetic acid cleavage according to claim 1, wherein, The inside of the sleeve (161) is sequentially provided with an extractant entering bin (36), an extractant discharging bin (37), a mixed liquid entering bin (38) and a mixed liquid discharging bin (39), wherein the first extractant inlet pipe (14) is communicated with the inside of the extractant discharging bin (37), the first mixed liquid inlet pipe (15) is communicated with the inside of the mixed liquid discharging bin (39), the second extractant inlet pipe (48) is communicated with the inner wall of the extractant entering bin (36), and the second mixed liquid inlet pipe (18) is communicated with the inner wall of the mixed liquid entering bin (38), and the outer wall of one side of the end sleeve (162) is fixedly connected with the extractant flushing pipe (17), and the extractant flushing pipe (17) and the second extractant inlet pipe (48) are communicated with each other.

3. The device for facilitating the extraction and separation of acetic anhydride from acetic acid cleavage according to claim 1, wherein, The inside of the water storage cylinder (3) and the vertical pipe (4) is provided with a driving lifting rod (9), and the top outer wall of the driving lifting rod (9) is fixedly connected with a floating plate (10), the outer wall of the driving lifting rod (9) is fixedly connected with a first flow guide plate (49) inside the vertical pipe (4), the bottom outer wall of the driving lifting rod (9) is fixedly connected with a passive lifting rod (11) distributed at equal distances, and the passive lifting rod (11) is slidingly connected to the inner wall of the mixed liquid shunt pipe (7), and the top outer wall of the mixed liquid shunt pipe (7) is fixedly connected with a second flow guide plate (12).

4. The device for facilitating the extraction and separation of acetic anhydride from acetic acid cleavage according to claim 1, wherein, The extractant release disc set (5) comprises a first-stage extractant release disc, a second-stage extractant release disc and a third-stage extractant release disc distributed in sequence from top to bottom, wherein the first-stage extractant release disc, the second-stage extractant release disc and the third-stage extractant release disc correspond one-to-one to the first-stage separation display ring (44), the second-stage separation display ring (45) and the third-stage separation display ring (46); The inner wall of the tower body (1) is welded with fixed rings (19) distributed at equal distances outside the extractant release disc set (5), and the mixed liquid shunt pipe (7) is located between the fixed rings (19) and the extractant release disc set (5).

5. The device for facilitating the extraction and separation of acetic anhydride from acetic acid cleavage according to claim 1, wherein, The top of the inner wall of the tower body (1) is respectively provided with adjacent distribution of a first baffle (20) and adjacent distribution of a second baffle (22), the two first baffles (20) are filled with a first filler (21), and the two second baffles (22) are filled with a second filler (23), the bottom outer wall of the tower body (1) is fixedly connected with an acetic acid discharge pipe (24), and the outer wall of one side of the tower body (1) is fixedly connected with a drain pipe (25) between the first filler (21) and the second filler (23), the outer wall of one side of the tower body (1) is fixedly connected with an ethyl acetate discharge pipe (26) above the second filler (23), wherein the water storage cylinder (3) is arranged through the inner wall of the first baffle (20), the first filler (21), the second baffle (22) and the second filler (23).

6. The device for facilitating the extraction and separation of acetic anhydride from acetic acid cleavage according to claim 1, wherein, The top of the outer wall of the vertical pipe (4) is provided with equidistantly distributed extractant converging holes (29) inside the extractant collector (13), and the outer wall of the vertical pipe (4) is provided with equidistantly distributed extractant diverging holes (30) inside the extractant release disc group (5), the outer wall of the vertical pipe (4) is fixedly connected with a top sleeve (31) and a bottom sleeve (32) by screws, and the extractant release disc group (5) is fixedly connected between the top sleeve (31) and the bottom sleeve (32) by screws.

7. The device for facilitating the extraction and separation of acetic anhydride from acetic acid cleavage according to claim 1, wherein, The inside of the tower body (1) is provided with an acetic acid settling zone (34), a mixing zone (33) and a separation zone (35) for separating ethyl acetate and water from bottom to top, wherein the extractant release disc group (5), the mixing liquid spray pipe (8) and the fixed ring (19) are located inside the mixing zone (33), and the first baffle (20), the first filler (21), the second baffle (22) and the second filler (23) are located inside the separation zone (35). The top outer wall of the tower body (1) is fixedly connected with a motor base (27) by screws, and the servo motor (2) is fixedly connected to the inner wall of the motor base (27) by screws, and the bottom and top of the outer wall of one side of the tower body (1) are provided with observation tubes (28).

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