VDF efficient synthesis device based on micro-channel reactor

Abstract

The invention discloses a VDF efficient synthesis device based on a micro-channel reactor. The VDF efficient synthesis device comprises the micro-channel reactor; the flow meter is arranged on the feeding pipe of the micro-channel reactor; the feeding regulating valve is arranged on a feeding pipe of the micro-channel reactor; the data input end of the PLC is connected with the data output end of the flow meter, and the start-stop control part of the PLC is connected with the start-stop control end of the feeding adjusting valve. The method is innovated from three aspects of safety, process and equipment. In the aspect of safety, a pressure-resistant and explosion-proof micro-channel reactor is adopted, and a pressure monitoring valve, an emptying valve and a feeding stop valve which are interlocked with a PLC (Programmable Logic Controller) are matched; according to the technology, efficient mass and heat transfer is achieved through the micro-channel, the efficiency is improved by 40% through a flow meter and a feeding adjusting valve, raw material consumption is reduced by 18%, and continuous production is achieved; on the equipment, a modularized micro-channel unit is designed, and a micro-channel is finely manufactured. The prepared product has stable quality and narrow molecular weight distribution, is suitable for the fields of lithium battery diaphragms and the like, and has the advantages of safety, high efficiency, high quality and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluorine-containing compound synthesis equipment, and particularly relates to a VDF efficient synthesis device based on a micro-channel reactor. BACKGROUND

[0002] In the current VDF synthesis technical field, the traditional process has a series of outstanding problems. Most of the traditional reaction devices use large kettle type reactors, which have poor mass and heat transfer efficiency, causing uneven mixing of the reaction materials, and the reaction heat is difficult to dissipate in time, which easily forms local overheating, which not only limits the reaction efficiency, but also causes a large number of side reactions, resulting in waste of raw materials and high production cost.

[0003] At the same time, the traditional reactor is seriously insufficient in safety protection, lacks effective pressure-resistant explosion-proof structure and emergency mechanism for sudden pressure change, and once abnormal working conditions such as overpressure occur, it is easy to cause safety accidents such as explosion and leakage, which brings great threat to the life and health of the operators. In addition, the traditional process is mainly intermittent production, which is difficult to realize continuous and stable production process, which not only hinders the expansion of production scale, but also leads to obvious fluctuation of product quality and wide molecular weight distribution, which cannot meet the strict demand of the field such as lithium battery separator for polymer performance.

[0004] Furthermore, the structural design of the traditional equipment is not conducive to rapid maintenance and repair, the reaction parts are cumbersome to disassemble, the micro-channel manufacturing precision is low, and the problems of material residue and blockage frequently occur, which seriously interferes with the continuity and stability of production. SUMMARY

[0005] In view of the above technical problems, the present application provides a VDF efficient synthesis device based on a micro-channel reactor.

[0006] In order to achieve the above purpose, the technical scheme of the present application is as follows: A VDF efficient synthesis device based on a micro-channel reactor, comprising: a micro-channel reactor; a flow meter arranged on the feed pipe of the micro-channel reactor; a feed adjusting valve arranged on the feed pipe of the micro-channel reactor; a PLC controller, the data input end of which is connected with the data output end of the flow meter, and the start-stop control part of which is connected with the start-stop control end of the feed adjusting valve.

[0007] The present application also comprises: a feed cut-off valve arranged on the feed pipe of the micro-channel reactor; a pressure transmitter arranged on the pipeline in the micro-channel reactor; a vent cut-off valve arranged on the vent pipe of the micro-channel reactor; The start-stop control end of the feed cut-off valve is connected with the start-stop control part of the PLC controller; the data output end of the pressure transmitter is connected with the data input end of the PLC controller; and the start-stop control end of the vent cut-off valve is connected with the start-stop control part of the PLC controller.

[0008] The micro-channel reactor is provided with a heating device.

[0009] The micro-channel reactor is composed of a plurality of micro-channel reaction units and is divided into two paths, and the two paths are connected in parallel, and each path is composed of a plurality of micro-channel reaction units connected in series.

[0010] The beneficial effects of the present application are: 1. The present application is innovated from the aspects of safety, process and equipment. In terms of safety, a pressure-resistant explosion-proof micro-channel reactor is adopted, and a pressure monitoring, venting and feed cut-off valve is connected with a PLC controller; in terms of process, micro-channel efficient mass and heat transfer is utilized, and a flow meter and a feed regulating valve are used to improve efficiency by 40%, reduce raw material consumption by 18% and realize continuous production; in terms of equipment, a modular micro-channel unit is designed, and a micro-channel is precisely manufactured. The prepared product has stable quality and narrow molecular weight distribution, is suitable for fields such as lithium battery separators, and has advantages of safety, high efficiency and high quality, and has great industrial application value.

[0011] 2. The micro-channel reactor with pressure-resistant explosion-proof design has good chemical stability, and the system is equipped with a pressure transmitter, a vent cut-off valve and a feed cut-off valve, and the above-mentioned valves are connected with a PLC controller to ensure the safety and controllability of the reaction under abnormal conditions; the efficient mass and heat transfer characteristics of the micro-channel reactor are utilized, and the mixing and residence time of the reactants are accurately controlled by means of a flow meter and a feed regulating valve, so that the reaction efficiency is improved by 40%, the raw material consumption is reduced by 18%, and continuous production is realized, which is easy for process scaling up; the modular micro-channel reaction unit is easy to assemble, disassemble and maintain, and the micro-channel is manufactured by using precision machining technology, so as to ensure the size precision and surface finish of the channel and reduce the risk of material residue and blockage.

[0012] 3. The pressure transmitter of the present application monitors the internal pressure of the reactor in real time, and transmits the pressure data to the PLC controller through a signal transmission route, when the pressure exceeds the preset safety threshold, the PLC controller controls the vent cut-off valve to automatically open and release pressure, 4. The feed cut-off valve of the present application is connected with the PLC controller, and when an abnormally high pressure or other dangerous signal is detected, the PLC controller controls it to immediately cut off the material inflow channel.

[0013] 5. This invention fully leverages the unique and highly efficient mass and heat transfer potential of microchannel reactors. Through ingenious design of the microchannel structure and fluid dynamics, and with the aid of flow meters and feed regulating valves, the mixing ratio and residence time of the reactants are precisely controlled. Repeated and rigorous experimental verification has shown that this process can significantly increase reaction efficiency by 40% compared to traditional processes, allowing raw materials to participate more fully in the reaction and effectively reducing raw material consumption by up to 18%.

[0014] 6. This invention innovatively realizes a continuous production mode, breaking through the constraints of traditional intermittent production. Through the rational planning of the material conveying system and the connection with the reaction process, combined with the ingenious combination of microchannel modules, stable and continuous product output can be achieved. Furthermore, during process scale-up, simply increasing the number of microchannel reactor modules by a certain proportion easily expands the production scale, greatly enhancing production flexibility and scalability. In this process, the heating device provides a precise and stable temperature environment for the reaction, facilitating its efficient advancement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of the invention.

[0017] like Figure 1 As shown, a high-efficiency VDF synthesis device based on a microchannel reactor includes: a microchannel reactor 1; a flow meter 4 installed on the feed pipe of the microchannel reactor 1; a feed regulating valve 5 installed on the feed pipe of the microchannel reactor 1; and a PLC controller 2, whose data input terminal is connected to the data output terminal of the flow meter 4, and whose start / stop control section is connected to the start / stop control section of the feed regulating valve 5. The invention also includes: a feed shut-off valve 6 installed on the feed pipe of the microchannel reactor 1; a pressure transmitter 8 installed on a pipeline inside the microchannel reactor 1; and a vent shut-off valve 3 installed on the vent pipe of the microchannel reactor 1. The start / stop control section of the feed shut-off valve 6 is connected to the start / stop control section of the PLC controller 2; the data output terminal of the pressure transmitter 8 is connected to the data input terminal of the PLC controller 2; and the start / stop control section of the vent shut-off valve 3 is connected to the start / stop control section of the PLC controller 2. A heating device 7 is installed inside the microchannel reactor 1. The microchannel reactor 1 consists of several microchannel reaction units, which are divided into two paths connected in parallel. Each path consists of several microchannel reaction units connected in series.

[0018] The application is used: 1. Device preparation stage: First, according to the process requirements, select the appropriate number of micro-channel reaction units, assemble through standardized interfaces, build a complete micro-channel reactor 1, ensure that each module is tightly connected and there is no risk of leakage. At the same time, install the heating device 7 and adjust it to the predetermined temperature parameter. Connect the feed pipe and the discharge pipe to ensure that the pipeline is unobstructed. Install the feed cutoff valve 6, the feed regulating valve 5, the flow meter 4 and the pressure transmitter 8, calibrate the pressure transmitter 8 to the preset safety pressure value, debug the interlocking function of each valve and the PLC controller 2, ensure smooth signal transmission, and each component responds timely and accurately. Check if the signal transmission route connection is normal to ensure that the information exchange of the entire system is unobstructed, and make thorough preparations for the subsequent introduction of reactants and the discharge of products. 2. Reaction start-up stage: Start the material conveying system, and the material flows to the micro-channel reactor through the feed pipe. At this time, the flow meter 4 monitors the material flow in real time and transmits the data to the PLC controller 2. The PLC controller 2 adjusts the flow rate and mixing ratio of the material accurately according to the preset flow parameter through the control of the feed regulating valve 5, so that the material reaches the best initial state before entering the micro-channel reactor. Start the heating device 7 to adjust the temperature, pressure and other reaction conditions of the micro-channel reactor to the predetermined process parameters, so as to promote the smooth start of the reaction, and the material begins to react in the micro-channel reaction unit. 3. Reaction running stage: During the reaction process, the pressure transmitter 8 continuously monitors the internal pressure of the reactor and transmits the pressure data to the PLC controller 2 in real time through the signal transmission route. The PLC controller 2 adjusts the opening and closing state of the vent cutoff valve 3 and the feed cutoff valve 6 in real time according to the preset pressure threshold value. For example, if the pressure approaches the overpressure threshold value, the PLC controller 2 immediately instructs the vent cutoff valve 3 to open to release excess pressure, while preparing to instruct the feed cutoff valve 6 to cut off the feed to ensure system safety. At the same time, the PLC controller 2 continuously receives the material flow data from the flow meter 4, dynamically adjusts the feed regulating valve 5 according to the preset process curve, and ensures that the mixing ratio and residence time of the reaction material are always in the optimal state to ensure that the reaction efficiency is stably improved by 40%. Due to the use of continuous production mode, as the reaction continues, the generated VDF product continuously flows out from the discharge pipe, and through subsequent condensation, collection and other processing procedures, the product is preliminarily collected. 4. Device maintenance stage: Periodically, the micro-channel reactor is maintained and inspected, the size accuracy and surface finish of the micro-channel are sampled and inspected by using professional testing tools, if material residues or slight blockage signs are found, the micro-channel is cleaned by using mild cleaning reagents and specific cleaning process, to ensure the channel is unobstructed. Every certain period, the modular micro-channel reaction unit is disassembled and inspected, the sealing of the connecting interface, the wear condition of the internal components of each unit, etc. are checked, the problematic components or units are replaced in time, to ensure the long-term stable operation of the entire reaction device.

[0019] This is through the top security protection, excellent process performance, convenient maintenance and high-end product quality four advantages, using pressure explosion-proof design and PLC control to ensure safety, efficient mass transfer and heat transfer to improve efficiency and reduce consumption, modular design for easy maintenance, precise micro-channel to ensure material flow, output narrow molecular weight distribution of high-quality VDF products, to fully improve production efficiency and product quality, reduce risk and cost, enhance market competitiveness.

[0020] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all variations and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

Claims

1. A high-efficiency VDF synthesis device based on a microchannel reactor, characterized in that, include: Microchannel reactor (1); A flow meter (4) is installed on the feed pipe of the microchannel reactor (1); A feed regulating valve (5) is installed on the feed pipe of the microchannel reactor (1); The PLC controller (2) has its data input terminal connected to the data output terminal of the flow meter (4), and its start / stop control section is connected to the start / stop control terminal of the feed regulating valve (5).

2. The VDF high-efficiency synthesis device based on a microchannel reactor according to claim 1, characterized in that, Also includes: A feed shut-off valve (6) is installed on the feed pipe of the microchannel reactor (1); A pressure transmitter (8) is installed on the pipeline inside the microchannel reactor (1); A vent shut-off valve (3) is installed on the vent pipe of the microchannel reactor (1); Among them, the start / stop control terminal of the feed shut-off valve (6) is connected to the start / stop control section of the PLC controller (2); the data output terminal of the pressure transmitter (8) is connected to the data input terminal of the PLC controller (2); and the start / stop control terminal of the vent shut-off valve (3) is connected to the start / stop control section of the PLC controller (2).

3. The VDF high-efficiency synthesis device based on a microchannel reactor according to claim 1, characterized in that, The microchannel reactor (1) is equipped with a heating device (7).

4. The VDF high-efficiency synthesis device based on a microchannel reactor according to claim 1, characterized in that, The microchannel reactor (1) consists of several microchannel reaction units and is divided into two paths, which are connected in parallel. Each path consists of several microchannel reaction units connected in series.

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