CN106669582B - A multi-component layered symmetrical baffle impinging flow mixing reactor - Google Patents

Abstract

A multi-component layered symmetrical baffle-type impingement flow mixing reactor, which relates to a chemical reactor, wherein multiple groups of feed inlets of the reactor are coaxially opposed, that is, the reactor has multiple sets of coaxially opposed feed materials The impact surface of each group of material inlets is provided with baffles perpendicular to the inlet and mutually symmetrical, and baffles are provided between each group of feeding pipes; when the invention works, the two nozzles of each group of feeding pipes spray out The material undergoes an impingement flow reaction. The high turbulent impact in the axial direction at the initial stage of the reaction achieves preliminary mixing, and then it tends to move outward along both sides of the radial direction and leave the center to impinge on the flow field. At this time, the setting of the two symmetrical baffles prevents this deviation tendency, so that the fluid returns to the high turbulence area to achieve sufficient reaction and mixing. And under the action of the baffle, the material forms a reciprocating bypass flow, which greatly increases the residence time of the material in the impact area, thereby improving the working efficiency of the reactor, and the reactor is easy to install and is suitable for various working conditions , low maintenance costs.

Description

A multi-component layered symmetrical baffle impinging flow mixing reactor

technical field

The invention relates to a chemical reactor, in particular to a symmetrical baffle plate impinging flow mixing reactor with multi-component layers.

Background technique

Impinging flow is a relatively novel technical method, which was first proposed by Elperin. Its basic idea is that two or more streams of homogeneous or heterogeneous fluids move towards each other and collide to generate a high turbulence area, which provides a good environment for strengthening heat and mass transfer. Excellent condition. The continuous phases of the two fluids collide with each other, reciprocating and oscillating, resulting in intense mixing in the impact zone, resulting in homogenization of temperature and composition. This is beneficial to increase the average push force and facilitate the transfer process. Due to its special flow structure of impinging on each other, there are wide-spectrum multi-frequency pressure fluctuations in the subsonic range in the impinging flow, which is very effective for microscopic mixing. This makes the impinging flow also have great development and utilization value in the aspects of reaction and precipitation.

Most impinging flow reactors currently used in industry are draft tubes with built-in propellers. Although the mixing efficiency has been improved, the propellers are expensive to manufacture and easy to wear. However, the impingement flow reactor formed by jet flow has a small impact area and limited effective mixing capacity, which greatly limits the application of impingement flow technology in industrial production.

Contents of the invention

The object of the present invention is to provide a multi-component layered symmetrical baffle type impinging flow mixing reactor.

The purpose of the present invention is achieved through the following technical solutions:

A multi-component layer symmetrical baffle-type impingement flow mixing reactor. The reactor body is a vertical cylinder, with an oval top cover installed on the upper part and an oval kettle bottom installed on the lower part. The gas outlet and thermometer are installed on the cover. and a pressure gauge socket, a vent valve is installed at the gas outlet, a discharge port is arranged at the bottom of the kettle, an overflow port is arranged on the upper part of the kettle body, and a heat exchange jacket is arranged on the outside of the tower wall. The reactor includes a kettle body, a feed pipe, and a bottom , top cover; the reactor is a plurality of coaxially opposed feeding pipes, the feeding pipes (6) have the same diameter and length; the impact surface of each group of material inlets is provided with baffles perpendicular to the inlet and symmetrical to each other; At the same time, there is a baffle plate between each group of feed pipes, so that the material can realize the repeated impact flow reaction in the reactor; the reactor body of the reactor is a vertical cylinder, with an oval top cover installed on the upper part and a The bottom of the kettle is oval; the top cover is provided with a gas outlet, a thermometer and a pressure gauge socket, and the overflow port on the upper part of the kettle body leads out the light components after the reaction; the multiple groups of feed ports of the reactor are coaxially opposed and the installation structure , diameter and spacing can be adjusted, and the distance between two symmetrical baffles and the curvature of the baffles can also be adjusted; when working, the two nozzles of each group of feeding pipes eject materials to react with impact flow, and the high turbulent impact in the axial direction at the initial stage of reaction Initial mixing is achieved, and then there is a tendency to move outward along both sides of the radial direction and leave the center to hit the flow field; at this time, the setting of the two symmetrical baffles prevents this tendency to deviate, allowing the fluid to flow back to the high turbulence area to achieve Fully react and mix; and make the material form a reciprocating flow under the action of the baffle.

A multi-component layer symmetrical baffle type impingement flow mixing reactor, nozzles are installed at the outlet end of the feed pipe.

Advantage and effect of the present invention are:

The invention is a symmetrical baffle plate impinging flow mixing reactor with multi-component layers, and the reactor can meet liquid-liquid rapid mixing reaction. The reactor not only embodies the characteristics of traditional impingement flow enhanced mass transfer and heat transfer, but also makes the materials in the mixer reciprocate to perform multiple impingement flow reactions. The reactor is composed of multiple groups of coaxially opposed feed pipes, and the impact surface of each group of material inlets is provided with baffles perpendicular to the inlet and symmetrical to each other. At the same time, there is a baffle plate between each group of feed pipes, so that the material can realize the repeated impact flow reaction in the reactor. The kettle body of the reactor is a vertical cylinder, with an oval top cover installed on the upper part and an oval kettle bottom installed on the lower part. The top cover is provided with a gas outlet, thermometer and pressure gauge sockets, of which the gas outlet can be equipped with a vent valve, and the bottom of the kettle is equipped with a discharge port to extract heavy materials; the overflow port on the upper part of the kettle body can extract light components after reaction. A heat exchange jacket is installed outside the tower wall, which can be used to heat or cool the material and control the temperature in the reactor. The multiple groups of feed inlets of the reactor are coaxially opposed, and the installation structure, diameter and spacing are all adjustable, and the distance between two symmetrical baffles and the curvature of the baffles are also adjustable. When working, the two nozzles of each group of feed pipes eject materials for impact flow reaction. The high turbulent impact in the axial direction at the initial stage of the reaction achieves preliminary mixing, and then produces a tendency to move outward along both sides of the radial direction and leave the center to impact the flow field. . At this time, the setting of the two symmetrical baffles prevents this deviation tendency, so that the fluid flows back to the high turbulence area to achieve sufficient reaction and mixing. And under the action of the baffle, the material forms a reciprocating flow, which greatly increases the residence time of the material in the impact area, thereby improving the working efficiency of the reactor, and the reactor is easy to install and is suitable for various working conditions , low maintenance costs.

Has the following characteristics:

1. The present invention utilizes the characteristics of impinging flow to strengthen micro-mixing, and can improve the uniformity of mixing and the efficiency of mixing by strengthening the transfer between phases;

2. The symmetrical baffles added in the structure of the present invention can limit the radial flow of the fluid after impact, thereby increasing the turbulence intensity in the impact area, increasing the vortex area, making the material mix more fully, and improving the reaction efficiency;

3. The present invention adds a baffle to the structure, which can make the fluid go around repeatedly to form a cycle, thereby increasing the residence time of the material in the impact area, making the mixing more uniform and improving the reaction efficiency;

4. The adjustable nozzle at the outlet end of the feed inlet of the present invention, the spacing and curvature of the symmetrical baffles, and the adjustment of the spacing and curvature of the baffles will improve the mixing uniformity and mixing efficiency due to changes in the physical properties of the materials.

5. The present invention can be applied to continuous production or intermittent production, and can adapt to mixed reactions in different working conditions.

Description of drawings

Fig. 1 is the structural representation of the symmetrical baffle type impinging flow reactor of multi-component layer;

Fig. 2 is a schematic cross-sectional view of Fig. 1 A-A.

Detailed ways

The present invention will be described in detail below in conjunction with the embodiments shown in the accompanying drawings.

Reactor of the present invention is made up of parts such as kettle body 3, feed pipe 6, elliptic kettle bottom 9, top cover 14, and can realize the impact of the fluid under the submerged state and mix in the kettle body. The feeding pipes 6 are coaxially opposed in multiple groups. Nozzles are installed at the outlet end of the feed pipe, and the diameter and spacing of the nozzles can be adjusted according to actual working conditions. A symmetrical baffle 10 perpendicular thereto is installed on the same plane as the feed pipe, and the spacing and curvature of the baffles are adjustable. A baffle is provided between each group of feed pipes. The kettle body 3 is a vertical cylindrical shape, and a heat exchange jacket 5 is arranged on the outside of the kettle body, which can be heated or cooled according to the working conditions; the top cover 14 is oval in shape, and the top is equipped with a pressure gauge 2, a thermometer 1, and a gas outlet 15 and other components. An overflow outlet 11 is arranged on the upper part of the kettle body. The bottom of the still 9 is oval, and the bottom of the still bottom is provided with a discharge port 7, and the discharge mode can be selected according to the physical properties of the reaction product.

Reactor is made up of kettle body 3, feed pipe 6, oval kettle bottom 9, parts such as top cover 14. The material enters the reaction zone through multiple sets of feed pipes 6, and collides in the impact zone. After the impact, the fluid flows in the radial direction, and makes it flow back after being restricted by the symmetrical baffle, resulting in a secondary impact. At the same time, the material in each group of impact zones To pass through the flow around the baffle, so as to increase the residence time of the material in the impact area, fully improve the mixing efficiency.

Example:

Fig. 1 is a structural schematic diagram of the symmetrical baffle type impinging flow mixing reactor of the present invention.

In the figure: 1-thermometer, 2-pressure gauge, 3-kettle body, 4, 8-heat exchange medium inlet and outlet, 5-heat exchange jacket, 6-feed pipe, 7-discharge port, 9-kettle bottom , 10-symmetry baffle, 11-baffle plate, 12-overflow port, 13-overflow weir, 14-top cover, 15-gas outlet.

The reactor is composed of a kettle body 3, a feed pipe 6, an oval kettle bottom 9, and a top cover 14. The main processing material is stainless steel. 14. The lower part is an elliptical kettle bottom 9, the outer wall is provided with a heat exchange jacket 5, the top cover is provided with a gas outlet 15, a pressure gauge 2, and a thermometer 1, the gas outlet can be connected to a vent valve, and the bottom of the kettle is provided with a discharge port 7.

The working process of the present invention is as follows. Driven by the pump (not involved in the figure), the liquid-phase process medium passes through the flow meter and enters multiple groups of feed pipes according to the flow rate required by the working conditions. After the material enters, it collides with the center of the kettle, and the pressure distribution in the collision zone is obvious. Increase, and the high turbulence intensity promotes the rapid mixing of materials. After the impact, the internal flow field distribution shows that the material flows radially away from the high turbulence area, and reflux occurs after being restricted by the symmetrical baffle, and the returned material returns to high turbulence. A secondary impact occurs in the zone, at this time, the turbulence intensity in the impact zone increases due to backflow, and the vortex area increases, which promotes the mixed reaction to further react or mix quickly and effectively. Because the materials in each group of impact areas need to flow around the baffles, the materials between the baffles form a reciprocating cycle, which greatly increases the residence time in the impact area, significantly shortens the mixing time, and improves the mixing efficiency. The mixing reactor highlights the effect of impinging flow to strengthen the transfer between phases, and makes up for the defect of short residence time of materials in the high turbulence area. When the pressure in the reaction kettle exceeds the allowable pressure, the pressure can be released through the vent valve 15; when the liquid in the kettle meets the reaction (mixing) requirements, the discharge port 7 or the overflow outlet 11 can be opened, and the product can be obtained after subsequent processing. A heat exchange jacket 5 is provided outside the reactor wall to heat or cool the process medium during the reaction. Setting the nozzle of the feeding pipe in the submerged state can increase the contact and residence time of the material, strengthen the transfer between phases, and make the mixing more thorough. The unique structural design of this reactor has the characteristics of high processing efficiency, easy operation and low maintenance cost. It is suitable for the process of uniform mixing and rapid reaction of materials, and broadens the application range of impinging flow technology in industrial production.

Claims (2)

1. a kind of multiple groups are layered symmetrical baffle plate formula percussion flow mixing reactor, the autoclave body of reactor is vertical and cylindrical, top peace Ellipsoidal head is filled, oval bottom is installed in lower part, and top cover is equipped with gas vent, thermometer and pressure gauge socket, gas and goes out Mouth installation blow valve, bottom set out material mouth, and autoclave body top sets overflow port, sets heat exchange jacket on the outside of tower wall, be additionally provided with heat transferring medium Inlet and outlet, reactor are the coaxial opposed feed pipe of multiple groups, and feed pipe (6) diameter, length are identical；The shock of every group of material inlet Face is designed with the baffle vertical and symmetrical with entrance；It is equipped with baffle plate between every group of feed pipe simultaneously, is reacting material The multiple impact stream reaction to move in circles is realized in device；Autoclave body top overflow port draws the light component after reaction；Multiple groups feed pipe For coaxial opposed and mounting structure, diameter, spacing is adjustable, two symmetrical baffle spacing and baffle curvature are also adjustable；When work, Two nozzles of every group of feed pipe eject material and carry out impinging stream reaction, and the high turbulence of initial reaction stage axial direction, which is hit, realizes preliminary mix It closes, generates the tendency that radially two sides moved out, left center impact flow field later；The setting of two symmetrical baffle plates obstructs at this time This deviation tendency makes fluid reflux to high turbulence region to reach sufficiently reaction and mix；And under the action of baffle plate Make material formed move in circles stream.

2. a kind of multiple groups according to claim 1 are layered symmetrical baffle plate formula percussion flow mixing reactor, which is characterized in that institute State feed pipe outlet end installation nozzle.