A multi-raw material precise proportioning and mixing device suitable for DTBP micro-reaction

Abstract

The application relates to the technical field of mixing, in particular to a multi-raw-material precise proportioning and mixing device suitable for DTBP micro-reaction, which comprises a plate-type reactor, a raw material supply unit, a proportioning and mixing unit and a linkage adjusting mechanism. The raw material supply unit comprises methyl ethyl ketone feeding pipes and hydrogen peroxide feeding pipes for respectively feeding methyl ethyl ketone and hydrogen peroxide, a DMP feeding pipe for feeding DMP and a sodium sulfate feeding pipe for feeding sodium sulfate. The proportioning and mixing unit comprises a first mixer, a second mixer, a third mixer and a mixing flow guide shell arranged in the three mixers. Two mixing pipes are arranged at the upstream of the mixing flow guide shell. The linkage adjusting mechanism comprises an adjusting assembly arranged at the upstream of the mixing flow guide shell, an electromagnet push rod for controlling the adjusting assembly and a flow channel switching assembly linked with the adjusting assembly. The flow channel switching assembly comprises a movable connecting seat which can be driven to move by the electromagnet push rod, and the movement of the movable connecting seat can synchronously change the guiding state of the fluid after passing through the adjusting assembly.

Description

Technical Field

[0001] This invention relates to the field of mixing technology, specifically to a multi-raw material precise proportioning mixing device suitable for DTBP microreactors. Background Technology

[0002] Di-tert-butyl peroxide (DTBP), as an important organic peroxide initiator, has wide applications in polymerization reactions, rubber crosslinking, printing and dyeing bleaching, and biodiesel cetane number improvement. Traditional DTBP production processes often employ batch reactors, using tert-butanol as a raw material. The reaction with hydrogen peroxide under sulfuric acid produces tert-butyl hydrogen peroxide, which further reacts with tert-butanol to yield DTBP.

[0003] In chemical production, especially in the synthesis of organic peroxides such as di-tert-butyl peroxide (DTBP), precise, rapid, and uniform mixing of multiple raw materials is a crucial prerequisite for ensuring reaction safety and improving product selectivity and yield. Microreactor technology, due to its excellent mass and heat transfer properties, provides a revolutionary approach for these rapid, strongly exothermic reactions. Developing precise multi-raw material mixing devices around microreactors has become an important direction, but existing technologies still have significant shortcomings in terms of adaptability, mixing efficiency, and system integration.

[0004] First, the proportioning and mixing optimization of existing devices are usually decoupled. Most devices rely on independent flow control units (such as metering pumps and valves) to regulate the input ratio of each raw material, while the geometry and flow channel state of the downstream mixer (such as a static mixing core or stirring structure) remain constant. This means that when the raw material ratio, especially when the differences in the specific gravity, viscosity, and other physical properties of each component are large or the ratio changes significantly, the fixed mixing structure cannot dynamically adapt to the changed hydrodynamic conditions. For example, in the synthesis of DTBP, as the ratio of hydrogen peroxide to methyl ethyl ketone is adjusted, the flow pattern and inertial force differences of the two-phase flow will change significantly. The fixed-structure mixer is unlikely to generate optimal turbulence intensity and shear rate under all operating conditions, which can easily lead to uneven mixing, a wider residence time distribution, and consequently, local hot spots, increased side reactions, and even safety risks due to the local accumulation of peroxides. To address this, this application proposes a multi-raw material precise proportioning mixing device suitable for DTBP microreactors. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-raw material precise proportioning and mixing device suitable for DTBP microreactors, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-raw material precise proportioning mixing device suitable for DTBP microreactors, comprising a plate reactor, and further comprising:

[0007] The raw material supply unit includes an ethyl ketone inlet pipe and a hydrogen peroxide inlet pipe for conveying methyl ethyl ketone and hydrogen peroxide, respectively, as well as a DMP inlet pipe for conveying DMP and a sodium sulfate inlet pipe for conveying sodium sulfate.

[0008] The mixing unit includes a first mixer, a second mixer, a third mixer, and a mixing guide shell disposed inside the three mixers. Two mixing inlet pipes are disposed upstream of the mixing guide shell, and a mixing outlet pipe is disposed downstream of the mixing guide shell.

[0009] The linkage adjustment mechanism includes an adjustment component located upstream of the mixing guide shell, an electromagnet push rod for controlling the adjustment component, and a flow channel switching component linked with the adjustment component.

[0010] The flow channel switching component includes a movable connecting seat that can be moved by an electromagnet push rod. The movement of the movable connecting seat can synchronously change the guiding state of the fluid after adjusting the component.

[0011] The secondary mixing unit includes a secondary mixing pipe connected downstream of the flow channel switching assembly, and a plurality of staggered branch pipes arranged vertically for diverting fluid within the secondary mixing pipe. The plurality of staggered branch pipes are interconnected and have overlapping cavities at their connection points.

[0012] Preferably, the regulating component includes an outlet communicating with the mixing pipe, and a valve body movable inside the outlet to change its effective fluid area, wherein a through rod connected to the valve body can be driven inside the electromagnet push rod.

[0013] Preferably, the flow channel switching assembly further includes multiple rows of vertical grooves arranged inside the mixing guide shell. One side of each row of vertical grooves is slidably connected to a baffle plate that can block itself. The mixing guide shell is provided with multiple inlet pipes that communicate with the two mixing pipes. The mixing guide shell is slidably connected with a perforated plate that can simultaneously change the flow area of ​​the multiple inlet pipes. A pull handle is rotatably connected between the perforated plate and the baffle plate. The movable connecting seat is slidably connected to the middle end of the pull handle and connected to the through rod.

[0014] Preferably, a motor is fixedly connected to one side of the mixing guide shell, the output end of the motor extends into the interior of the mixing guide shell and is fixedly connected to a rotating rod, a stirring blade is fixedly connected to the outer surface of the rotating rod, a Y-shaped inlet pipe is connected to one side of the two mixing pipes, and a turbine blade is fixedly connected to one end of the rotating rod extending into the Y-shaped inlet pipe.

[0015] Preferably, a rotating rod is rotatably connected inside the secondary mixing pipe, and multiple fine mixing discs are fixedly connected to the outer surface of the rotating rod. The fine mixing discs have mixing cavities inside, multiple side holes are opened on the side of the fine mixing discs, and multiple through holes are opened on the end face of the fine mixing discs. The side holes and through holes are respectively connected to the mixing cavities. The side holes are used to receive the fluid discharged into the secondary mixing pipe by the inlet pipe.

[0016] Preferably, an inlet is provided at the downstream end of the Y-shaped inlet pipe, one end of the inlet is connected to a guide shell, the side of the guide shell is provided with a drain hole for fluid discharge, and the rotating rod passes through the interior of the guide shell and is fixedly connected to a water turbine blade.

[0017] Preferably, the methyl ethyl ketone (MEK) inlet pipe is equipped with a MEK feed pump to drive the flow of MEK, the hydrogen peroxide inlet pipe is equipped with a hydrogen peroxide feed pump to drive the flow of hydrogen peroxide, and both the MEK and hydrogen peroxide inlet pipes are equipped with a first tubular reactor. One end of the first mixer is connected to a connecting pipe, and the top of the plate reactor is connected to an inlet pipe communicating with the connecting pipe.

[0018] Preferably, the plate reactor has an outlet pipe at its top, which is connected to the second mixer via a second tubular reactor. The DMP inlet pipe is equipped with a DMP feed pump to drive the flow of DMP. The fluid discharged from the DMP inlet pipe and the second tubular reactor respectively enter the upstream portion of the second mixer. The downstream portion of the second mixer is connected to the upstream portion of the third mixer via a third tubular reactor. The sodium sulfate inlet pipe is equipped with a sodium sulfate feed pump to drive the flow of sodium sulfate. The fluid discharged from the sodium sulfate inlet pipe and the third tubular reactor respectively enter the upstream portion of the third mixer. A mixing pipe is connected to the downstream portion of the third mixer.

[0019] Preferably, the outer surface of the valve body is fixedly connected with a plurality of turbulence-disrupting blades for agitating fluid turbulence.

[0020] Preferably, a spring is fixedly connected inside the mixing guide shell, and one end of the spring is fixedly connected to the perforated plate.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The integrated regulating component, flow channel switching component, and stirring component within the mixing guide shell form a synergistic system that enables adaptive reconfiguration of the flow channel structure as the specific gravity of the raw materials changes. When the specific gravity of the two raw materials is close, the baffle fully opens the multiple vertical channels, allowing the two fluids to collide and mix in the central region. This, combined with the high-speed rotating stirring blades, provides strong shear force to overcome the stratification effect. When the specific gravity difference is significant, the system automatically adjusts the valve opening ratio, allowing a small amount of high-density raw material to disperse into the mainstream through the inlet pipe as a micro-jet, while the low-density raw material dominates the flow in the multiple vertical channels, forming the optimal mixing mode.

[0023] 2. The multi-stage flow splitting and recombination structure formed by the two mixing pipes and the staggered branch pipes, combined with the fluid merging design of the overlapping cavity, achieves a deep redistribution of the initially mixed fluid, effectively breaking the concentration gradient and eliminating microscopic inhomogeneities. The dynamic mixing system composed of the rotating rod and the fine mixing disc, through the synergistic effect of perforations and side holes, enables the main mixing fluid and the single raw material introduced through the inlet pipe to undergo secondary mixing at the molecular level within the mixing cavity, significantly improving the mixing uniformity. The fluid energy flowing tangentially into the inlet drives the water turbine blades, causing the rotating rod to rotate continuously without the need for additional energy input, making it particularly suitable for processing heat-sensitive substances such as DTBP. The spiral guide groove inside the fine mixing disc extends the fluid residence time and improves molecular diffusion efficiency; while the staggered arrangement of the branch pipes and the side pipes in the overlapping cavity form a multi-layered turbulent structure, causing fluids of different densities to be continuously divided and recombinated during the flow process, effectively overcoming the gravitational stratification effect. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0025] Figure 2 This is a partial structural diagram of the present invention;

[0026] Figure 3 This is a schematic cross-sectional view of the first mixer in this invention;

[0027] Figure 4 This is a schematic cross-sectional view of the hybrid flow guide shell in this invention;

[0028] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A;

[0029] Figure 6 This is a partial structural schematic diagram of the hybrid flow guide shell in this invention;

[0030] Figure 7 This is a schematic cross-sectional view of the two-pipe system in this invention.

[0031] Figure 8 This is a schematic diagram of the staggered pipe structure in this invention;

[0032] Figure 9 This is a schematic cross-sectional view of the guide shell in this invention;

[0033] Figure 10 This is a schematic cross-sectional view of the fine mixing disc in this invention;

[0034] Figure 11 This is a schematic diagram of the rotating rod structure in this invention.

[0035] In the diagram: 100, Plate reactor; 101, First mixer; 200, Methyl ethyl ketone (MEK) inlet pipe; 201, MEK feed pump; 202, Hydrogen peroxide inlet pipe; 203, Hydrogen peroxide feed pump; 204, First tubular reactor; 205, Connecting pipe; 206, Inlet pipe; 207, Outlet pipe; 208, Second tubular reactor; 209, Second mixer; 210, DMP inlet pipe; 211, DMP feed pump; 212, Third tubular reactor; 213, Third mixer; 214, Mixing manifold; 215, First branch pipe; 216, Second branch pipe; 217, Sodium sulfate inlet pipe; 218, Sodium sulfate feed pump; 300, Mixing guide shell; 301, Mixing inlet pipe; 302, Mixing outlet pipe. Pipe; 303, Outlet; 304, Electromagnetic push rod; 305, Through rod; 306, Valve body; 307, Turbine vane; 308, Motor; 309, Rotating rod; 310, Turbine blade; 311, Y-shaped inlet pipe; 312, Multi-row vertical groove; 313, Baffle plate; 314, Perforated plate; 315, Spring; 316, Pull handle; 317, Movable connecting seat; 318, Inlet pipe; 319, Stirring blade; 400, Two-way mixing pipe; 401, Interlaced branch pipe; 402, Bypass pipe; 403, Overlapping cavity; 404, Rotating rod; 405, Fine mixing disc; 406, Side hole; 407, Through hole; 408, Mixing cavity; 409, Inlet cut; 410, Guide shell; 411, Outlet hole; 412, Water wheel blade. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figure 1 - Figure 11 This invention provides a technical solution: a multi-raw material precise proportioning mixing device suitable for DTBP microreactors, comprising a plate reactor 100, wherein the plate reactor 100 adopts a multi-layer microchannel plate stacked structure, having an extremely high heat transfer coefficient, and further comprising:

[0038] The mixing unit includes a first mixer 101, a second mixer 209, a third mixer 213, and a mixing guide shell 300 disposed inside the three. Two mixing inlet pipes 301 are provided upstream of the mixing guide shell 300, and a mixing outlet pipe 302 is provided downstream of the mixing guide shell 300. By providing mixing guide shells 300 in the first mixer 101, the second mixer 209, and the third mixer 213, various different raw materials can be mixed. The two mixing inlet pipes 301 located upstream allow the raw materials to enter, while the mixing outlet pipe 302 allows the mixed raw materials to be discharged. Each mixing guide shell 300 adopts a modular design, which is convenient for maintenance and replacement.

[0039] The raw material supply unit includes an ethyl ethyl ketone (MEK) inlet pipe 200 and a hydrogen peroxide inlet pipe 202 for conveying MEK and hydrogen peroxide, respectively; a DMP inlet pipe 210 for conveying DMP; and a sodium sulfate inlet pipe 217 for conveying sodium sulfate. The MEK inlet pipe 200 is internally equipped with an MEK feed pump 201 to drive the flow of MEK. The hydrogen peroxide inlet pipe 202 is internally equipped with a hydrogen peroxide feed pump 203 to drive the flow of hydrogen peroxide. Both the MEK inlet pipe 200 and the hydrogen peroxide inlet pipe 202 are internally equipped with a first tubular reactor 204. One end of a first mixer 101 is connected to a connecting pipe 205. The top of a plate reactor 100 is connected to an inlet pipe 206 communicating with the connecting pipe 205. The top of the plate reactor 100 is equipped with an outlet pipe 207, which communicates with a second mixer 209 via a second tubular reactor 208. The DMP inlet pipe 210 is internally equipped with a... A DMP feed pump 211 drives the flow of DMP. The fluid discharged from the DMP inlet pipe 210 and the second tubular reactor 208 respectively enters the upstream of the second mixer 209. The downstream part of the second mixer 209 is connected to the upstream of the third mixer 213 through the third tubular reactor 212. A sodium sulfate feed pump 218 that drives the flow of sodium sulfate is installed inside the sodium sulfate inlet pipe 217. The fluid discharged from the sodium sulfate inlet pipe 217 and the third tubular reactor 212 respectively enters the upstream of the third mixer 213. A mixing pipe 214 is connected to the downstream of the third mixer 213. By setting up a raw material supply unit, multiple different raw materials can be mixed alternately to realize a complete process. The first tubular reactor 204, the second tubular reactor 208 and the third tubular reactor 212 can operate the raw materials to mix or react after mixing, and can stably reach the temperature or pressure required by the raw materials.

[0040] The first tubular reactor 204 is a microchannel tubular reactor, coiled into a spiral shape to save space, and equipped with a precise temperature control jacket with a temperature control accuracy of ±0.5℃. After the two fluids react initially in the first tubular reactor 204, they converge into the first mixer 101 for precise mixing.

[0041] The linkage adjustment mechanism includes an adjustment component located upstream of the mixing guide shell 300, an electromagnet push rod 304 for controlling the adjustment component, and a flow channel switching component linked with the adjustment component. By setting the adjustment component, the amount of raw material entering at the upstream position can be controlled. At the same time, the two adjustment components in the mixing guide shell 300 can operate independently, thereby forming a complete specific gravity adjustment. The electromagnet push rod 304 can be used to execute commands to control the opening and closing state of the adjustment component to achieve flow rate adjustment. The flow channel switching component can change its flow direction according to the mixing specific gravity of individual raw materials to achieve a high-efficiency mixing effect.

[0042] The regulating component includes an outlet 303 connected to the mixing pipe 301, and a valve body 306 movable inside the outlet 303 to change its effective fluid area. An electromagnet push rod 304 can drive a through rod 305 connected to the valve body 306. Multiple turbulence vanes 307 for agitating fluid turbulence are fixedly connected to the outer surface of the valve body 306. The valve body 306 is conical, while the outlet 303 is cylindrical. The effective flow area of ​​the outlet 303 is changed by changing the axial position between the valve body 306 and the outlet 303. The turbulence vanes 307 can provide turbulence for the fluid passing through the outlet 303.

[0043] The flow channel switching assembly includes a movable connecting seat 317 that can be moved by an electromagnet push rod 304. The movement of the movable connecting seat 317 can synchronously change the guiding state of the fluid after adjusting the assembly.

[0044] Furthermore, the flow channel switching assembly also includes multiple rows of vertical grooves 312 arranged inside the mixing guide shell 300. A baffle plate 313, capable of sealing itself, is slidably connected to one side of each vertical groove 312. Multiple inlet pipes 318, communicating with the secondary mixing pipe 400, are arranged inside the mixing guide shell 300. A perforated plate 314, capable of simultaneously changing the flow area of ​​the multiple inlet pipes 318, is slidably connected inside the mixing guide shell 300. A pull handle 316 is rotatably connected between the perforated plate 314 and the baffle plate 313. A movable connecting seat 317 is slidably connected to the middle end of the pull handle 316 and connected to the through rod 305. A spring 315 is fixedly connected inside the mixing guide shell 300. One end of the spring 315 is fixedly connected to the perforated plate 314. By setting a baffle plate 313, the multi-row vertical grooves 312 can be blocked. After the baffle plate moves, the multi-row vertical grooves 312 can be gradually opened. The perforated plate 314 can be set to gradually block the inlet pipe 318 after it moves. This allows the multi-row vertical grooves 312 to be gradually opened and the inlet pipe 318 to be gradually closed when the pull handle 316 is subjected to force and changes its tilt state, thereby realizing the switching of the flow channel. The above changes are achieved when the flow rate of the outlet 303 increases, and the opposite behavior will occur when the flow rate of the outlet 303 decreases.

[0045] When the through rod 305 moves, it drives the movable connecting seat 317 to move synchronously, pushing the pull handle 316 to change its angle. Through leverage, this simultaneously pulls the baffle plate 313 to open the multi-row vertical grooves 312 and pushes the perforated plate 314 closer to the inlet pipe 318 to reduce its flow area. The spring plate 315 provides a balancing force to ensure smooth movement. This linkage mechanism enables adaptive adjustment of the flow channel structure: when the flow rate of a single stream increases, the opening of the multi-row vertical grooves 312 increases, and the opening of the inlet pipe 318 decreases, allowing the high-flow-rate fluid to mainly pass through the central area; when the flow rate decreases, the process is reversed, with the low-flow-rate fluid mainly entering through the inlet pipe 318.

[0046] A motor 308 is fixedly connected to one side of the mixing guide shell 300. The output end of the motor 308 extends into the interior of the mixing guide shell 300 and is fixedly connected to a rotating rod 309. An stirring blade 319 is fixedly connected to the outer surface of the rotating rod 309. A Y-shaped inlet pipe 311 is connected to one side of the secondary mixing pipe 400. One end of the rotating rod 309 extends into the Y-shaped inlet pipe 311 and is fixedly connected to a turbine blade 310. The stirring blade 319 can disturb and push the raw materials to move and mix, while the turbine blade 310 can disperse and divert the mixed raw materials.

[0047] It is worth mentioning that when the two raw materials mixed into the mixing guide shell 300 have similar specific gravities, the two valve bodies 306 are in the same open and closed state, that is, the flow rate is the same. Most of the two raw materials will pass through the multi-row vertical grooves 312 and collide with each other to form turbulence. At this time, the two raw materials are continuous phases and have equal strength. It takes longer time and stronger mechanical force to overcome the stratification effect caused by the density difference. The stirring blade 319 can provide strong mechanical force for mixing.

[0048] When the two raw materials have different proportions, the raw material with the lower proportion will be the dispersed phase and the other will be the continuous phase. Most of the raw material with the lower proportion will pass through the inlet pipe 318 and be dispersed into the other raw material mainly by diffusion mixing.

[0049] Specifically, in use, methyl ethyl ketone (MEK) is connected to an MEK tank via the MEK inlet pipe 200, and MEK is supplied by the MEK feed pump 201. Meanwhile, hydrogen peroxide (HPeroxide) is supplied via the hydrogen peroxide inlet pipe 202 connected to a hydrogen peroxide tank and supplied by the hydrogen peroxide feed pump 203. Both MEK and hydrogen peroxide pass through the first tubular reactor 204 and then converge into the first mixer 101 for mixing.

[0050] For example, when methyl ethyl ketone (MEK) and hydrogen peroxide enter the mixing guide shell 300 within the first mixer 101 through the mixing pipe 301, the through rod 305 can be moved by operating the electromagnet push rod 304, thereby changing the position of the valve body 306 within the outlet 303. This alters the effective flow area of ​​the raw materials through the outlet 303, thus achieving a change in the specific gravity between the two raw materials. Multiple turbulence vanes 307 on the surface of the valve body 306 can disturb the raw materials, generating turbulence that flows into the mixing guide shell 300. As the through rod 305 moves, it controls the opening and closing area of ​​the outlet 303, simultaneously moving the movable connecting seat 317. When the movable connecting seat 317 moves, it pushes one end of the pull handle 316 to compress the spring 315, changing the position of the perforated plate 314 and causing it to gradually approach the multiple inlet pipes 318, thus reducing its fluid area. Simultaneously, it pulls the baffle plate 313, gradually opening the multiple rows of vertical grooves 312. This process coordinates with the fluid area of ​​the outlet 303; that is, as the flow area of ​​the outlet 303 gradually increases... As the fluid area of ​​the inlet pipe 318 is gradually reduced while the multi-row vertical channels 312 are gradually opened, the single raw material will converge at the center of the mixing guide shell 300 and mix with another raw material in an alternating manner when the mixing amount increases. After the methyl ethyl ketone and hydrogen peroxide are mixed, they will enter the plate reactor 100 through the connecting pipe 205 for reaction and then be discharged through the outlet pipe 207. After passing through the second tubular reactor 208, they will flow into the mixing guide shell 300 in the second mixer 209. At the same time, the DMP inlet pipe 210 will be opened. The DMP is connected to the DMP storage tank and driven by the DMP feed pump 211 to flow into the second mixer 209. The DMP is mixed again with the mixture of methyl ethyl ketone and hydrogen peroxide and then reacted through the third tubular reactor 212 before flowing into the mixing guide shell 300 in the third mixer 213. The sodium sulfate inlet pipe 217 is connected to the sodium sulfate storage tank and driven by the sodium sulfate feed pump 218 to enter the third mixer 213 and mix with the former mixture before being discharged through the mixing drain pipe 214.

[0051] In summary, the integrated regulating component, flow channel switching component, and stirring component within the mixing guide shell 300 form a synergistic system that enables adaptive reconfiguration of the flow channel structure as the specific gravity of the raw materials changes. When the specific gravity of the two raw materials is close, the baffle plate 313 fully opens the multi-row vertical grooves 312, allowing the two fluids to mix against each other in the central region. This, combined with the high-speed rotating stirring blades 319, provides strong shear force to overcome the stratification effect. When the specific gravity difference is significant, the system automatically adjusts the opening ratio of the valve body 306, allowing a small amount of high-density raw material to disperse into the mainstream through the inlet pipe 318 as a micro-jet, while the low-density raw material dominates the flow in the multi-row vertical grooves 312, forming the optimal mixing mode.

[0052] Example 2: Please refer to Figure 1 - Figure 11The present invention also provides a technical solution, which differs from the technical solution of Embodiment 1 as follows: a multi-raw material precise proportioning mixing device suitable for DTBP microreactors, further comprising:

[0053] The secondary mixing unit includes a secondary mixing pipe 400 connected downstream of the flow channel switching component, and multiple staggered branch pipes 401 arranged vertically for diverting the fluid within the secondary mixing pipe 400. The multiple staggered branch pipes 401 are interconnected and have overlapping cavities 403 at the connection points, forming an oval shape. Adjacent groups of staggered branch pipes 401 are offset in the vertical direction to form an S-shaped flow path, enhancing the shearing and folding effect of the fluid during the flow process. By setting up the secondary mixing unit, the mixed raw materials can be mixed a second time. By setting up the staggered branch pipes 401, the raw materials can be diverted to form multiple flow channels, and the overlapping cavity 403 can be used for the multiple flow channels to mix again to achieve efficient mixing.

[0054] Furthermore, a rotating rod 404 is rotatably connected inside the secondary mixing pipe 400. Multiple fine mixing discs 405 are fixedly connected to the outer surface of the rotating rod 404. Each fine mixing disc 405 has a mixing cavity 408 inside. Multiple side holes 406 are formed on the side of each fine mixing disc 405, and multiple through holes 407 are formed on the end face of each fine mixing disc 405. The side holes 406 and through holes 407 communicate with the mixing cavity 408. The side holes 406 are used to receive fluid discharged into the secondary mixing pipe 400 from the inlet pipe 318, and the side holes 406 are flush with the inlet pipe 318. The surface configuration allows the raw material entering the secondary mixing pipe 400 via the inlet pipe 318 to enter the fine mixing disk 405. The raw material in the secondary mixing pipe 400 passes through the perforation 407 and is mixed in the mixing cavity 408. The main mixing fluid in the secondary mixing pipe 400 enters the mixing cavity 408 through the perforation 407, while a single raw material introduced through the inlet pipe 318 is injected into the mixing cavity 408 through the side hole 406. The two fluids mix again in the mixing cavity 408 and then flow out from the perforation 407 on the other side, achieving a multi-stage mixing effect. The rotation of the rotating rod 404 causes periodic disturbances in the fine mixing disk 405, breaking the laminar boundary layer and significantly improving mass transfer efficiency.

[0055] The Y-shaped inlet pipe 311 has an inlet cut 409 at its downstream end. One end of the inlet cut 409 is connected to a guide shell 410. The guide shell 410 has a drain hole 411 on its side for fluid discharge. The rotating rod 404 passes through the interior of the guide shell 410 and is fixedly connected to a water wheel 412. The water wheel 412 can rotate under the action of the fluid, thereby driving the rotating rod 404 to rotate continuously. The inlet cut 409 enters the guide shell 410 tangentially, while the drain hole 411 discharges the guide shell 410 tangentially.

[0056] Specifically, the motor 308 drives the rotating rod 309 to rotate, and the stirring blades 319 on the rotating rod 309 rapidly mix the two raw materials in the mixing guide shell 300. At the same time, the turbine blades 310 at the end of the rotating rod 309 push the mixed fluid to the Y-shaped inlet pipe 311 in the form of divergent turbulence.

[0057] After the mixed raw materials pass through the Y-shaped inlet pipe 311, they enter the guide shell 410 tangentially from the inlet cut 409, impacting the water turbine blades 412 and generating a rotational torque, which drives the rotating rod 404 to rotate continuously. The fluid is then discharged tangentially from the outlet hole 411 and enters the secondary mixing pipe 400 to form a spiral flow field.

[0058] The discharged mixed raw material flows to both ends of the secondary mixing pipe 400, passing through multiple fine mixing discs 405. During this process, the main mixing fluid enters the mixing chamber 408 through the perforations 407 on the end face of the fine mixing discs 405.

[0059] Simultaneously, the single raw material transported through the inlet pipe 318 is injected into the mixing chamber 408 through the side hole 406.

[0060] The two fluids are mixed again in the rotating mixing chamber 408, and the spiral guide groove 416 extends the residence time and enhances molecular diffusion.

[0061] After the mixed fluid flows out of the fine mixing disc 405, it enters multiple staggered branch pipes 401. Due to the staggered arrangement of the branch pipes 401, the fluid merges at the overlapping cavity 403 after flowing through different paths. The bypass pipe 402 forces the fluid to undergo secondary diversion.

[0062] The raw materials after secondary mixing are discharged through the mixing pipe 302 and enter the next process stage.

[0063] In summary, the multi-stage flow splitting and recombination structure formed by the two mixing pipes 400 and the staggered branch pipes 401, combined with the fluid confluence design of the overlapping cavity 403, achieves a deep redistribution of the initially mixed fluid, effectively breaking the concentration gradient and eliminating microscopic inhomogeneities. The dynamic mixing system composed of the rotating rod 404 and the fine mixing disc 405, through the synergistic effect of the perforations 407 and the side holes 406, enables the main mixing fluid and the single raw material introduced through the inlet pipe 318 to undergo secondary mixing at the molecular level in the mixing cavity 408, significantly improving the mixing uniformity. The fluid energy flowing tangentially into the inlet 409 drives the water turbine 412, which in turn drives the rotating rod 404 to rotate continuously without the need for additional energy input. This fundamentally eliminates the risk of local hot spots that may be caused by external motors, making it particularly suitable for the treatment of heat-sensitive substances such as DTBP. The spiral guide groove 416 inside the fine mixing disk 405 prolongs the fluid residence time and improves the molecular diffusion efficiency; while the staggered arrangement of the interleaved branch pipes 401 and the side pipes 402 in the overlapping cavity 403 form a multi-level turbulent structure, which allows fluids of different densities to be continuously divided and recombined during the flow process, effectively overcoming the gravity stratification effect.

[0064] Working principle: When in use, the methyl ethyl ketone inlet pipe 200 is connected to the methyl ethyl ketone tank, and the methyl ethyl ketone is transported under the action of the methyl ethyl ketone feed pump 201. The hydrogen peroxide inlet pipe 202 is connected to the hydrogen peroxide tank and is transported under the action of the hydrogen peroxide feed pump 203. The two are respectively transported through the first tubular reactor 204 and then merged into the first mixer 101 for mixing.

[0065] Methyl ethyl ketone (MEK) and hydrogen peroxide enter the mixing guide shell 300 within the first mixer 101 through the mixing pipe 301. The through rod 305 is moved by operating the electromagnet push rod 304, thereby changing the position of the valve body 306 within the outlet 303. This alters the effective flow area of ​​the raw materials through the outlet 303, thus achieving a change in the specific gravity between the two raw materials. Multiple turbulent vanes 307 on the surface of the valve body 306 can agitate the raw materials, generating turbulence that flows into the mixing guide shell 300. The movement of the through rod 305 controls the opening and closing area of ​​the outlet 303 and simultaneously moves the movable connecting seat 317. When the movable connecting seat 317 moves, it will push one end of the pull handle 316 to squeeze the spring 315 and change the position of the perforated plate 314, so that it gradually approaches the multiple inlet pipes 318 and reduces its fluid area. At the same time, it can pull the baffle plate 313 to move, thereby gradually opening the multiple rows of vertical grooves 312. This process is coordinated with the fluid area of ​​the outlet 303. That is, as the flow area of ​​the outlet 303 gradually increases, the fluid area of ​​the inlet pipes 318 gradually decreases while the multiple rows of vertical grooves 312 gradually open. This makes it possible for a single raw material to gather at the center of the mixing guide shell 300 and mix with another raw material in an alternating manner when the mixing amount increases.

[0066] The motor 308 drives the rotating rod 309 to rotate, which in turn drives the stirring blade 319 to rotate, rapidly mixing the two raw materials and pushing them towards the Y-shaped inlet pipe 311. Simultaneously, the turbine blades 310 propel the two raw materials through the Y-shaped inlet pipe 311 in a divergent turbulent flow and discharge them into the secondary mixing pipe 400. Before entering the secondary mixing pipe 400, the mixed materials enter the guide shell 410 through the inlet cut 409 and are discharged through the outlet hole 411. As the mixed materials move inside the guide shell 410, they drive multiple waterwheel blades 412, which in turn drive the rotating rod 419. 04. Rotation, the raw material discharged through the discharge hole 411 will flow to both ends of the second mixing pipe 400, and then pass through multiple fine mixing discs 405. The perforation 407 in the fine mixing disc 405 allows the mixed raw material to pass through, while the side hole 406 on the side of the fine mixing disc 405 allows a single raw material to be discharged through the inlet pipe 318. The two are mixed again in 418, and then the mixed raw material will flow in multiple staggered branch pipes 401. The multiple staggered branch pipes 401 are intertwined with each other, and turbulence is generated by the upward and downward discharge, and then discharged through the discharge pipe 302.

[0067] After methyl ethyl ketone (MEK) and hydrogen peroxide are mixed, they enter the plate reactor 100 through the connecting pipe 205 for reaction and are then discharged through the outlet pipe 207. They then pass through the second tubular reactor 208 and flow into the mixing guide shell 300 in the second mixer 209. At the same time, the DMP inlet pipe 210 is connected to the DMP storage tank, and the DMP is driven into the second mixer 209 by the DMP feed pump 211. The mixture of DMP, MEK, and hydrogen peroxide is mixed again and then reacted through the third tubular reactor 212 before flowing into the mixing guide shell 300 in the third mixer 213. The sodium sulfate inlet pipe 217 is connected to the sodium sulfate storage tank, and the sodium sulfate is driven into the third mixer 213 by the sodium sulfate feed pump 218. The sodium sulfate is then mixed with the former mixture and discharged through the mixing outlet pipe 214.

[0068] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-raw material precise proportioning mixing device suitable for DTBP micro-reaction, comprising a plate reactor (100), characterized in that, Also includes: The raw material supply unit includes an ethyl ketone inlet pipe (200) and a hydrogen peroxide inlet pipe (202) for conveying ethyl ketone and hydrogen peroxide, respectively, a DMP inlet pipe (210) for conveying DMP and a sodium sulfate inlet pipe (217) for conveying sodium sulfate. The mixing unit includes a first mixer (101), a second mixer (209), a third mixer (213), and a mixing guide shell (300) disposed inside the three. Two mixing inlet pipes (301) are provided upstream of the mixing guide shell (300), and a mixing outlet pipe (302) is provided downstream of the mixing guide shell (300). The linkage adjustment mechanism includes an adjustment component located upstream of the mixing guide shell (300), an electromagnet push rod (304) for controlling the adjustment component, and a flow channel switching component linked with the adjustment component; The flow channel switching assembly includes a movable connecting seat (317) that can be moved by an electromagnet push rod (304). The movement of the movable connecting seat (317) can synchronously change the guiding state of the fluid after adjusting the assembly. The secondary mixing unit includes a secondary mixing pipe (400) connected downstream of the flow channel switching assembly and a plurality of vertically arranged staggered branch pipes (401) for diverting fluid within the secondary mixing pipe (400). The plurality of staggered branch pipes (401) are interconnected and have overlapping cavities (403) at the connection points. The regulating component includes an outlet (303) communicating with the mixing pipe (301) and a valve body (306) movable inside the outlet (303) to change its effective fluid area. The electromagnet push rod (304) has a through rod (305) connected to the valve body (306) that can be driven inside. The flow channel switching assembly also includes multiple rows of vertical grooves (312) arranged inside the mixing guide shell (300). One side of the multiple rows of vertical grooves (312) is slidably connected to a baffle plate (313) that can block itself. The mixing guide shell (300) is provided with multiple inlet pipes (318) that communicate with the two mixing pipes (400). The mixing guide shell (300) is internally slidably connected to a perforated plate (314) that can synchronously change the flow area of ​​multiple inlet pipes (318). A pull handle (316) is rotatably connected between the perforated plate (314) and the baffle plate (313). The movable connecting seat (317) is slidably connected to the middle end of the pull handle (316) and connected to the through rod (305).

2. The multi-raw material precise proportioning and mixing device suitable for DTBP microreactors according to claim 1, characterized in that: A motor (308) is fixedly connected to one side of the mixing guide shell (300). The output end of the motor (308) extends into the interior of the mixing guide shell (300) and is fixedly connected to a rotating rod (309). An stirring blade (319) is fixedly connected to the outer surface of the rotating rod (309). A Y-shaped inlet pipe (311) is connected to one side of the two mixing pipe (400). One end of the rotating rod (309) extends into the Y-shaped inlet pipe (311) and is fixedly connected to a turbine blade (310).

3. The multi-raw material precise proportioning mixing device suitable for DTBP microreactors according to claim 2, characterized in that: The internal structure of the two mixing pipe (400) is provided with a rotating rod (404) rotatably connected. Multiple fine mixing discs (405) are fixedly connected to the outer surface of the rotating rod (404). A mixing cavity (408) is opened inside the fine mixing disc (405). Multiple side holes (406) are opened on the side of the fine mixing disc (405). Multiple through holes (407) are opened on the end face of the fine mixing disc (405). The side holes (406) and through holes (407) are respectively connected to the mixing cavity (408). The side holes (406) are used to receive the fluid discharged into the two mixing pipe (400) by the inlet pipe (318).

4. A multi-raw material precise proportioning and mixing device suitable for DTBP microreactors according to claim 3, characterized in that: A cut-in port (409) is provided at the downstream end of the Y-shaped inlet pipe (311). One end of the cut-in port (409) is connected to a guide shell (410). A drain hole (411) for fluid discharge is provided on the side of the guide shell (410). The rotating rod (404) passes through the interior of the guide shell (410) and is fixedly connected to a water turbine blade (412).

5. A multi-raw material precise proportioning and mixing device suitable for DTBP microreactors according to claim 1, characterized in that: The methyl ethyl ketone inlet pipe (200) is equipped with a methyl ethyl ketone feed pump (201) for driving the flow of methyl ethyl ketone, and the hydrogen peroxide inlet pipe (202) is equipped with a hydrogen peroxide feed pump (203) for driving the flow of hydrogen peroxide. Both the methyl ethyl ketone inlet pipe (200) and the hydrogen peroxide inlet pipe (202) are equipped with a first tubular reactor (204). One end of the first mixer (101) is connected to a connecting pipe (205), and the top of the plate reactor (100) is connected to an inlet pipe (206) that communicates with the connecting pipe (205).

6. A multi-raw material precise proportioning and mixing device suitable for DTBP microreactors according to claim 5, characterized in that: The plate reactor (100) is provided with an outlet pipe (207) at the top. The outlet pipe (207) is connected to the second mixer (209) through the second tubular reactor (208). The DMP inlet pipe (210) is provided with a DMP feed pump (211) to drive the flow of DMP. The fluid discharged from the DMP inlet pipe (210) and the second tubular reactor (208) enter the upstream of the second mixer (209) respectively. The lower part of the second mixer (209) is connected to the upstream of the third mixer (213) through the third tubular reactor (212). The sodium sulfate inlet pipe (217) is provided with a sodium sulfate feed pump (218) to drive the flow of sodium sulfate. The fluid discharged from the sodium sulfate inlet pipe (217) and the third tubular reactor (212) enter the upstream of the third mixer (213) respectively. The downstream of the third mixer (213) is connected with a mixing pipe (214).

7. A multi-raw material precise proportioning and mixing device suitable for DTBP microreactors according to claim 1, characterized in that: The outer surface of the valve body (306) is fixedly connected with a plurality of turbulence-disrupting blades (307) for disturbing fluid turbulence.

8. A multi-raw material precise proportioning and mixing device suitable for DTBP microreactors according to claim 1, characterized in that: A spring (315) is fixedly connected inside the mixing guide shell (300), and one end of the spring (315) is fixedly connected to the perforated plate (314).

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