Continuous reaction or separation equipment

Abstract

The invention discloses continuous reaction or separation equipment which comprises a tank body and a reaction or separation pipeline, the plurality of reaction or separation pipelines are distributed in the tank body in any one or more modes of a spiral shape, a bundle shape, a flat plate shape and a roll shape, feeding ports of all the reaction or separation pipelines are connected with a main feeding port in the tank body through a feeding mother pipe, and discharging ports of all the reaction or separation pipelines are connected with a main discharging port in the tank body through a discharging mother pipe; switch valves are arranged on the feeding main pipe and the discharging main pipe; the reaction or separation pipeline is a multi-arc-shaped pipeline or a spiral pipeline, openings of two adjacent arc-shaped parts of the multi-arc-shaped pipeline are opposite, and the spiral pipeline is formed by connecting a plurality of continuous concentric circular bent pipes in series. The mixing and mass transfer effects are enhanced through the gravity of the materials and the action of alternating centrifugal force in opposite directions, the mass transfer uniformity of the solid-liquid materials is improved, and the device is particularly suitable for the reaction or separation process with solid particles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of continuous production and separation equipment, in particular to a continuous reaction or separation equipment, which is especially suitable for a reaction or separation process containing solid particles. BACKGROUND

[0002] As one of the important ways of efficient production in chemical production, continuous production can realize efficient production and low cost of target products, and has been widely used in various fields and has great development potential.

[0003] The existing continuous production technology is usually pot type or pipe type. The pot type continuous production equipment usually uses stirring to realize mixing, and multi-stage pot is connected in series to realize process continuity. This method often accompanies by-products, and the purity of the obtained product cannot be guaranteed. The pipe type continuous production equipment realizes the reaction of the reactants in the pipe, improves the heat exchange efficiency, and the residence time is relatively uniform. Compared with the pot type, the product purity is improved, but for the process with particle production or participation, how to ensure the uniformity of solid-liquid mass transfer in the pipe type equipment and at the same time avoid blockage is still a big problem.

[0004] The invention application with publication number CN119504328A realizes nitration reaction by using continuous pot type reactor and realizes temperature control, but the single pot series connection method adopted by it cannot finely control the temperature of different regions, and cannot realize complete continuity. Therefore, in large-scale production, this kind of method often has by-products, and the by-products will bring burden to the downstream separation process of continuous production. The invention application with publication number CN119236441A discloses a continuous oscillatory flow separation device with V-shaped connecting pipe structure, which enhances radial mixing by adding different structures in the straight pipe, and solves the problem of uneven suspension to a certain extent, but the pipe is provided with members, the manufacturing process is complex, and the blockage in the pipe may be aggravated.

[0005] In order to realize uniform, efficient and smooth continuous production, and obtain products with high purity and uniform particle size, the present application provides a continuous reaction or separation equipment. SUMMARY

[0006] The present application is aimed at the problems of low solid-liquid mass transfer efficiency, easy plugging during continuous or separation operation and single equipment application range in the existing continuous production and separation process, and provides a continuous reaction or separation equipment, which utilizes the alternate action of gravity and centrifugal force to strengthen the mass transfer effect, thereby improving the mass transfer uniformity of solid-liquid materials in the tubular continuous reaction or separation equipment, and the equipment can be applied to various reaction and separation conditions, especially to the processes with solid particles, and the plugging problem can be avoided.

[0007] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: A continuous reaction or separation equipment, comprising a tank body and reaction or separation pipelines; a plurality of reaction or separation pipelines are distributed in the tank body in any one or more of spiral, bundle, flat plate and roll forms; all the feed inlets of the reaction or separation pipelines are connected with a total feed inlet on the tank body through a feed main pipe, and all the discharge outlets are connected with a total discharge outlet on the tank body through a discharge main pipe; the feed main pipe and the discharge main pipe are both provided with on-off valves; the reaction or separation pipeline is a multi-arc pipeline or a spiral pipeline; the multi-arc pipeline has opposite openings of two adjacent arc portions; the spiral pipeline is formed by connecting a plurality of continuous concentric circular bend pipes in series.

[0008] Further, the multi-arc pipeline comprises a plurality of continuous U-shaped units, adjacent two U-shaped units share a straight line segment and have opposite opening directions; or the multi-arc pipeline comprises a plurality of arc-shaped units, adjacent arc-shaped units are connected at the head and tail and have opposite opening directions; or the multi-arc pipeline is formed by combining U-shaped units and arc-shaped units.

[0009] Further, the length of the straight line segment of the U-shaped unit is 0-0.90 times the maximum length of the tank body in the direction of the straight line segment.

[0010] Further, the maximum diameter of the concentric circular bend pipe of the spiral pipeline is 0.60-0.99 times the diameter of the cylindrical tank body, and the pitch of the spiral pipeline is 0.1-1.0 times the inner diameter of the pipe.

[0011] Further, when the reaction or separation pipeline is a spiral pipeline, all the reaction or separation pipelines are distributed in the tank body in a layered form in the vertical direction, and adjacent layers of the reaction or separation pipelines are connected through a single-arc or continuous reverse double-arc bend pipe.

[0012] Further, the included angle between the single-arc or continuous reverse double-arc bend pipe and the horizontal plane is π / 4-3π / 4.

[0013] Further, the inner diameter of the reaction or separation pipeline is 0.1-100 mm; the inner diameter is 0.1-10 mm in a laboratory scale; and the inner diameter is 1-100 mm in an industrial production scale.

[0014] Further, the curvature of the arc-shaped part of the multi-arc-shaped pipeline is π / 6-2π, and the radius is 0.5-5 times of the inner diameter of the pipeline.

[0015] Compared with the prior art, the present application has the following beneficial effects: The multi-arc-shaped pipeline of the present application is composed of units with specific arc-shaped structural features, and the mixing and mass transfer effects are enhanced by the gravity and centrifugal force of the materials, and it is especially suitable for the reaction or separation process in which solid particles exist, because the density of the solid particles is higher than that of the liquid, and the gravity and centrifugal force are higher than those of the fluid, and the effect of enhancing the mass transfer is more obvious. Overall, the present application can realize uniform, efficient and smooth continuous production and separation, and obtain products with high purity or uniform particle size, and improve the uniformity of the materials in the tubular continuous reaction or separation equipment, and the present application can be applied to various reaction and separation conditions. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a schematic diagram of the first structure of the present application; Fig. 2 is a schematic diagram of the second structure of the present application; Fig. 3 is a schematic diagram of the third structure of the present application; Fig. 4 is a schematic diagram of a three-stage continuous reaction or separation equipment. DETAILED DESCRIPTION

[0017] The specific embodiments are described below with reference to the accompanying drawings, and the specific embodiments are only used to specifically introduce the technical scheme of the present application, and do not limit the protection scope of the present application.

[0018] Referring to the accompanying drawings, Figs. 1 to 4 the present application provides a continuous reaction or separation equipment, which comprises a tank body and modular reaction or separation pipelines; a plurality of reaction or separation pipelines are distributed in the tank body in any one or more of a spiral shape, a bundle shape, a flat plate shape and a roll shape, the feed inlets of all the reaction or separation pipelines are gathered together and connected to a total feed inlet on the tank body through a feed main pipe, the discharge outlets are gathered together and connected to a total discharge outlet on the tank body through a discharge main pipe, the feed main pipe and the discharge main pipe are each provided with an on-off valve, the reaction or separation pipelines are fixed between the tank body by welding or bolts, and are arranged compactly with each other to improve the space utilization rate. When the temperature-controlling fluid fills the inside of the tank body, the reaction or separation fluid enters each reaction or separation pipeline, and the temperature of the fluid in the tank body can be accurately controlled through the shell-side circulation pipe and the on-off valve thereof.

[0019] The reaction or separation pipeline is a multi-arc pipeline; the multi-arc pipeline comprises a plurality of continuous U-shaped units, two adjacent U-shaped units share a straight segment and have opposite opening directions, the centrifugal force directions of fluid passing through the arc segments of the two adjacent U-shaped units are different, and the mass transfer effect is enhanced by alternately changing the centrifugal force directions of the fluid; or the multi-arc pipeline comprises a plurality of arc-shaped units, the first and last of adjacent arc-shaped units are connected and have opposite opening directions, such a reaction or separation pipeline is suitable for reacting or separating a fluid with large viscosity and slow mass transfer; or the multi-arc pipeline comprises U-shaped units and arc-shaped units, and the two types of units are combined. The reaction or separation pipeline is arranged in a vertical manner, and the fluid to be reacted or separated flows from bottom to top in the reaction or separation pipeline, so that the mixing and mass transfer effect of solid particles in the fluid to be reacted or separated can be enhanced, and the solid particles can be prevented from sinking to the bottom.

[0020] Alternatively, the reaction or separation pipeline is a spiral pipeline, all the reaction or separation pipelines are distributed in layers in the vertical direction in the tank body, the spiral pipeline is formed by connecting a plurality of continuous concentric circular bend pipes in series, the reaction or separation pipelines of adjacent layers are connected through a single-arc or continuous reverse double-arc bend pipe with an angle of π / 6-5π / 6 with the horizontal plane, and the angle is preferably π / 4-3π / 4. The maximum diameter of the concentric circular bend pipe is 0.60-0.99 times the diameter of the cylindrical tank body, and the pitch of the spiral pipeline is 0.1-1.0 times the inner diameter of the pipeline.

[0021] The U-shaped unit is divided into a straight segment and an arc segment, the length of the straight segment is 0-0.90 times the maximum length of the tank body in the direction of the straight segment, the straight segment plays a buffering role, and therefore such a reaction or separation pipeline is suitable for a reaction or separation system containing particles that are easy to break.

[0022] The inner diameter of the reaction or separation pipeline is 0.1-100 mm; in a laboratory scale, the inner diameter is 0.1-10 mm, and preferably 1-5 mm; in an industrial production scale, the inner diameter is 1-100 mm, and preferably 10-50 mm.

[0023] The curvature of the arc-shaped part of the multi-arc pipeline is π / 6-2π, and the radius is 0.5-5 times the inner diameter of the pipeline; preferably, the curvature is π / 2-3 / 2π, and more preferably, the curvature is π, and the radius is 1-3 times the inner diameter of the pipeline.

[0024] When the reaction or separation pipeline is distributed in a flat plate shape, a plurality of reaction or separation pipelines can be arranged in parallel to form a flat plate, the spacing between adjacent columns of reaction or separation pipelines is 0.1-5 times, and preferably 0.1-1 times, the inner diameter of the reaction or separation pipeline. The distance between adjacent flat plates is 0.1-3 times, and preferably 0.1-1 times, the inner diameter of the pipeline.

[0025] The tank body adopts a cylindrical or cubic shape. The device can be placed horizontally or vertically. When the reaction or separation pipeline is a multi-arc pipeline, the device is preferably placed vertically. When the reaction or separation pipeline is a spiral pipeline, the device is preferably placed horizontally. Multiple devices can be connected in series to form a multi-stage continuous reaction or separation device. The total outlet of the front-stage device is connected to the total inlet of the rear-stage device. The device is made of any one of stainless steel, glass, and silicon carbide.

[0026] The unmentioned parts of the present application are applicable to the prior art.

Claims

1. A continuous reaction or separation apparatus comprising a tank body and a reaction or separation conduit; characterized in that, The plurality of reaction or separation pipes are distributed in the tank in any one or more of spiral, bundle, flat plate and roll forms, all the feed inlets of the reaction or separation pipes are connected to the total feed inlet on the tank through a feed main pipe, all the discharge outlets of the reaction or separation pipes are connected to the total discharge outlet on the tank through a discharge main pipe, and the feed main pipe and the discharge main pipe are both provided with a switch valve; the reaction or separation pipe is a multi-arc pipe or a spiral pipe, the openings of two adjacent arc portions of the multi-arc pipe are opposite, and the spiral pipe is formed by connecting a plurality of continuous concentric circular bend pipes in series.

2. The continuous reaction or separation apparatus of claim 1, wherein, The multi-arc pipe comprises a plurality of continuous U-shaped units, and two adjacent U-shaped units share a straight line segment and have opposite opening directions; or the multi-arc pipe comprises a plurality of arc-shaped units, and two adjacent arc-shaped units are connected end to end and have opposite opening directions. Alternatively, the multi-arc pipe is formed by combining U-shaped units and arc-shaped units.

3. The continuous reaction or separation apparatus of claim 2, wherein, The length of the straight line segment of the U-shaped unit is 0-0.90 times the maximum length of the tank in the direction of the straight line segment.

4. The continuous reaction or separation apparatus of claim 1, wherein, The maximum diameter of the concentric circular bend pipe of the spiral pipe is 0.60-0.99 times the diameter of the cylindrical tank, and the pitch of the spiral pipe is 0.1-1.0 times the inner diameter of the pipe.

5. The continuous reaction or separation apparatus of claim 1 or 4, wherein, When the reaction or separation pipe is a spiral pipe, all the reaction or separation pipes are distributed in the tank in a layered form in the vertical direction, and the reaction or separation pipes of adjacent layers are connected through a single-arc or continuous reverse double-arc bend pipe.

6. The continuous reaction or separation apparatus of claim 5, wherein, The single-arc or continuous reverse double-arc bend pipe has an included angle of π / 4-3π / 4 with the horizontal plane.

7. The continuous reaction or separation apparatus of claim 1, wherein, The inner diameter of the reaction or separation pipe is 0.1-100 mm; in a laboratory scale, the inner diameter is 0.1-10 mm; and in an industrial production scale, the inner diameter is 1-100 mm.

8. The continuous reaction or separation apparatus of claim 1 or 7, wherein, The arc of the arc portion of the multi-arc pipe is π / 6-2π, and the radius is 0.5-5 times the inner diameter of the pipe.

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