CN1463804A - Integrated apparatus for ultrafine magnetic grain catalytic reaction and continuous segregation in liquid - Google Patents

Abstract

The integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles in a fluid of the present invention includes a rectangular parallelepiped reactor made of magnetically permeable material placed obliquely, and a magnet group A capable of reciprocating up and down is installed near the upper and lower surfaces of the reactor With the magnet group B, the spaced magnets in the magnet group are connected to move in the same direction, and the adjacent magnets move in the opposite direction; the high end of the reactor is connected to the feeder, and the low end is provided with a discharge port and a particle discharge port connected to the discharge port. A baffle is hung on the upper wall of the reactor above the discharge pipe; the two ends of the particle regenerator are respectively connected with the lower end of the discharge pipe and the lower end of the feeder; a pair of opposite rotation directions is installed near the upper end of the discharge pipe. The rotating roller is installed on the roller, which is formed by the butt joint of the semicircular magnetic ring and the semicircular magnetic isolation ring, and rotates with the rotation of the rotating roller. The direction of the semicircular magnetic ring is consistent; the ultrafine magnetic particles can be placed in the device Waveform movement is formed to achieve stirring effect, simultaneous reaction and continuous separation.

Description

An integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles in fluid

Technical field

The invention relates to a device for the reaction and separation of magnetic particles in liquid/gas phase fluids, which is mainly used in the fields of catalysis, adsorption and biological separation, and in particular to an integration of ultrafine magnetic particles in fluids for catalytic reaction and continuous separation device.

Background technique

Ultrafine magnetic particles have the advantages that ordinary solid particles do not have: ultrafine particles have a large specific surface area, which can greatly speed up the reaction speed when performing physical and chemical reactions; in addition, particles with superparamagnetic characteristics Under certain conditions, the particles exhibit good magnetism. When the external magnetic field is removed, the remanence of the particles is zero. According to this characteristic, the superparamagnetic particles can be conveniently located, separated, and recovered by using the external magnetic field. Therefore, at present, ultrafine magnetic particles have been widely used in catalysis, adsorption, bioseparation and other fields.

However, in the past, the unit operation of magnetic particles was usually divided into two independent operation units: reaction and separation. First, use mechanical stirring or electromagnetic stirring in the reactor to make the magnetic particles undergo physical and chemical reactions in the reactor. After the reaction is completed, the second step of operation is carried out, that is, the reaction product enters the separator, and the electromagnetic field, The permanent magnetic field separates the magnetic particles.

There are many reports about magnetic reaction devices and magnetic separation devices, such as patent CN: 86104692, which involves only a magnetic drum separator, and patent CN: 9121746, which is only a magnetic separation applied to the purification of coolant in grinding machines and other machine tools Patent CN: 94212122 introduces a device for separating paramagnetic gas and diamagnetic gas. Patent CN: 98204288 describes only a suction pump, suction pipe, etc. for separating magnetic particles. devices with biological samples, etc. They are only used for reaction or separation alone, which brings a lot of trouble to the operation, and the magnetic field used is usually an electromagnetic field, the magnetic field strength is weak, and the equipment cost is high; the integration of reaction and separation is conducive to scaling up and reducing operating costs. It is one of the important directions of chemical industry development at present; there is no report on the integration of ultrafine magnetic particles for reaction and continuous separation.

Contents of Invention

The purpose of the present invention is to provide an integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles in a fluid, which is mainly used in the fields of catalysis, adsorption and biological separation.

Technical scheme of the present invention is as follows:

The integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles provided by the present invention is characterized in that the device includes a rectangular parallelepiped reactor 3 made of magnetically permeable material placed in an inclined manner, close to the rectangular parallelepiped reactor The upper and lower surfaces of the reactor 3 are respectively equipped with a group of magnet group A and magnet group B that are vertical to the upper and lower surfaces and reciprocate up and down. Composed of bar magnets on the surface, the spaced bar magnets are connected and keep the same direction of motion, and the direction of motion of adjacent bar magnets is opposite; the high end of the cuboid reactor 3 is connected with the feeder 11, and the low end of the cuboid reactor 3 A discharge port 5 and a vertical particle discharge pipe 9 communicating with the discharge port 5 are provided, and a baffle plate 4 is suspended on the upper wall of the cuboid reactor 3 above the particle discharge pipe 9; the two ends of the particle regenerator 10 are respectively It is connected with the lower end of the particle discharge pipe 9 and the lower end of the feeder 11; a pair of rotating rollers 2 rotating clockwise and rotating rollers 8 rotating counterclockwise are installed near the upper end of the particle discharging pipe 9, and the rotating roller 2 The ring-shaped roller formed by the butt joint of semi-circular magnetic ring 6 and semi-circular magnetic isolation ring 61 is installed respectively on the roller wall of 8 and 8, and rotates with rotating roller 2 and 8, and the semi-circular magnetic ring on rotating roller 2,8 The relative position of ring 6 is always consistent;

The material of the cuboid reactor 3 is stainless steel, glass or plastic; the strip magnets in the magnet group A and the magnet group B are strip permanent magnets; the strip magnets are strips that produce 4000 Oersted type permanent magnet; the semi-circular annular magnetic ring 6 is a semi-circular permanent magnetic ring that produces 4000 Oersted; the lateral position stagger distance of the elongated magnet in the magnet group A and the elongated magnet in the magnet group B is L , 0≤L≤L ₀ +8cm, where L ₀ is the length of the transverse section of the bar magnet.

The integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles in a fluid provided by the present invention has the following characteristics:

(1) The device integrates reaction and continuous separation;

(2) The ultra-fine magnetic particles form a wave motion in the device to achieve the purpose of stirring and dispersing;

(3) The magnetic field always exists in the system, and the magnetic field always exists in the continuous process;

(4) The shape of the permanent magnet is designed as a slender strip, and its length is consistent with the width of the cuboid;

(5) The magnet group is connected with a mechanical device for controlling movement, and is driven by the mechanical device to perform reciprocating motion;

(6) The magnet group is installed in parallel with the reactor;

(7) The reactor is installed obliquely to facilitate the flow of solid particles to the outlet along the fluid direction;

(8) The structure of the device is simple, and the fluid flow resistance is small;

(9) The residence time of magnetic particles in the reactor can be controlled by adjusting the relative position between the magnets, that is, the size of L;

(10) The stirring intensity of the magnetic particles is modulated by adjusting the speed of the magnet movement.

Description of drawings

Accompanying drawing 1 is a structural representation of the present invention;

Accompanying drawing 2 and accompanying drawing 3 are the working state schematic diagrams of the present invention;

Among them, cuboid reactor 3 baffle 4 discharge port 5

Semi-circular magnetic ring 6 Semi-circular magnetic isolation ring 61 Rotary shaft roller 2, 8

Discharge pipe 9 granule regenerator 10 feeder 11

Magnet set A Magnet set B Bar magnets a, b, c, d

Bar magnets e, f, g, h

Figure 4 shows the waveforms of magnetic particles moving in a cuboid reactor when L=0 and L=L ₀ +8cm.

Detailed ways

Further describe the present invention below in conjunction with accompanying drawing and embodiment:

As can be seen from Fig. 1, the ultra-fine magnetic particle of the present embodiment carries out catalytic reaction, the integrated device of continuous separation in fluid, comprises the rectangular parallelepiped reactor 3 that is made by magnetic-conducting material of an oblique placement, and its material is stainless steel (glass or Plastics can also be), close to the upper and lower surfaces of the cuboid reactor 3, respectively install a group of magnet group A and magnet group B that are vertical to the upper and lower surfaces to reciprocate up and down, and the magnet group A and magnet group B are composed of Composed of bar magnets parallel to the upper and lower surfaces of the cuboid reactor 3, the bar magnets at intervals are connected and kept in the same direction of motion, and the direction of motion of adjacent bar magnets is opposite; the magnet group A and the magnet group A are driven by a mechanical device The elongated magnets in B reciprocate up and down; the magnet group A of this embodiment is composed of bar magnets a, b, c, and d at the same interval, and the magnet group B is composed of bar magnets e, f, and g at the same interval. , h, the lateral position stagger distance of magnet group A and magnet group B is L (0≤L≤L ₀ +8cm, where L ₀ is the length of the transverse section of the bar magnet); the bar magnet a and c are connected, and the bar magnet Shaped magnets b and d are connected, bar magnets e and g are connected, bar magnets f and h are connected, bar magnets a, c, e and g move in the same direction, and bar magnets b, d, f and h move in the same direction , when bar magnets a, c, f, h are close to the surface of cuboid reactor 3, bar magnets b, d, e, g are far away from the surface of cuboid reactor 3, as shown in Figure 2; bar magnets a, c, e , g and bar magnets b, d, f, h move in opposite directions, when bar magnets a, c, f, h are far away from the surface of cuboid reactor 3, bar magnets b, d, e, g are close to cuboid reactor 3 surface, as shown in Figure 3; the up-and-down reciprocating motion of the bar magnets in the magnet group A and the magnet group B will make the ultrafine magnetic particles in the cuboid reactor 3 perform the wave motion shown in Figure 2 and Figure 3, the size of L Determine the waveform of the waveform motion, and adjust the size of L to adjust the residence time of the magnetic particles in the reactor; the strip magnets in the magnet group A and the magnet group B in this embodiment are permanent magnets that produce 4000 Oersted; cuboid The high end of the reactor 3 is connected with the feeder 11, and the low end of the cuboid reactor 3 is provided with a discharge port 5 and a vertical particle discharge pipe 9 connected with the discharge port 5, and the cuboid above the particle discharge pipe 9 reacts A baffle plate 4 is hung on the upper wall of the device 3; the two ends of a particle regenerator 10 are respectively connected with the lower end of the particle discharge pipe 9 and the lower end of the feeder 11; The rotating rollers 2 and 8 with opposite directions of rotation, the rotating roller 2 rotates clockwise, and the rotating roller 8 rotates counterclockwise, wherein the walls of the rotating rollers 2 and 8 are respectively installed with a semi-circular magnetic ring 6 and a semi-circular magnetic isolation ring 61 The ring-shaped rollers formed by docking, and rotate with the rotation of the rotating rollers 2 and 8, the relative positions of the semi-circular magnetic rings on the rotating rollers 2 and 8 are always consistent; The special semi-circular permanent magnet ring rotates with the rotation of the rotating rollers 2 and 8 and keeps the same direction all the time.

Figure 2 and Figure 3 are the diagrams of their motion state respectively, the result of the reciprocating motion: the ultra-fine magnetic particles in the fluid form a wave motion, which plays a role in stirring and dispersing the fluid; the ultra-fine magnetic particles flow out with the fluid. When the material pipe 9, when the semicircular magnetic ring on the rotary roller 2 rotates close to the particle discharge pipe 9, the semicircular magnetic ring on the rotary roller 8 rotates away from the particle discharge pipe 9, and the ultrafine magnetic particles are sucked in On the wall on the left side of the discharge pipe 9; then when the semicircular ring magnetic ring on the rotating roller 2 rotates away from the particle discharge pipe 9, the particles break away from the magnetic attraction and fall from the left wall to achieve the purpose of separation. At this time, the semicircle on the rotating roller 8 The annular magnetic ring rotates close to the particle discharge pipe 9, and the ultrafine magnetic particles in the fluid are sucked on the wall on the right side of the discharge pipe 9; At this time, the semi-circular magnetic ring on the rotating roller 8 rotates away from the particle discharge pipe 9, and the magnetic particles sucked on the right wall break away from the magnetic attraction and fall from the right wall to separate. At this time, the ultrafine magnetic particles in the fluid are sucked in the The wall on the left side of the discharge pipe 9 is so continuous that the purpose of continuously separating magnetic particles is achieved.

The up and down reciprocating motion of the long strip magnets in the magnet group A and magnet group B of this device makes the magnetic particles form a wave motion to achieve the purpose of stirring, and there is a certain residence time; the stirring of the magnetic particles can be controlled by adjusting the speed of the magnet movement Strength; the residence time of magnetic particles in the reactor can be controlled by adjusting the distance L between the magnets.

In order to realize the integration of reaction and continuous separation, the magnetic field strength, particle size, and fluid properties must satisfy the following relationship: $h\frac{\mathrm{dH}}{\mathrm{dx}}>\frac{g}{K_P}\&CenterDot;\cos \mathrm{\&theta;}+\frac{18\mathrm{\&eta;\&upsi;}}{{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="A0212081000091.png"\; state="\{\{state\}\}">d</figure-callout>}}^2{\mathrm{\&rho;}}_P{K}_P}$

In the formula, d——the diameter of the particle (assuming that the particle is a sphere);

ρ _P - the density of particles;

η——dynamic viscosity of fluid;

H——magnetic field strength;

— Magnetic field gradient (rate of change of magnetic field strength per unit distance);

υ——the flow velocity of particles relative to the fluid perpendicular to the box surface;

θ——the angle of inclination of the cabinet;

X——the distance between the particle and the magnetic field;

g - acceleration due to gravity.

Example

When magnets a, c, f, h are close to the surface of the reactor, magnets b, d, e, g leave the surface of the reactor, and the magnetic particles gather at the corresponding positions where magnets a, c, f, h are close to the wall of the reactor ; When magnets a, c, f, h leave the surface of the reactor, magnets b, d, e, g are close to the surface of the reactor. The positions b, d, e, and g close to the surface of the reactor are gathered, and such continuous reciprocating motion makes the magnetic particles form a wave motion in the surface of the rectangular reactor, as shown in Fig. 2 and Fig. 3 . Therefore, the magnetic particles form a wave motion in the device and achieve the effect of stirring and dispersing. There is a certain residence time, and physical and chemical reactions can be carried out. Under the action of the magnetic field force on the rotating rollers 2 and 8 (the two shafts on the rotating rollers 2 and 8 drive the semicircular magnetic rings on it to rotate in opposite directions), after the magnetic particles are separated from the particle discharge port Enter the regenerator to regenerate, and then return to the feeder for recycling.

The residence time of the magnetic particles in the reactor can be adjusted by adjusting the distance L of the magnets, that is, the smaller the relative staggered distance L, the longer the residence time; the stirring intensity of the magnetic particles can be adjusted by adjusting the reciprocating speed of the magnets. When L=0cm and L=L ₀ +8cm, the motion waveform of magnetic particles in the reactor is referring to accompanying drawing 4, and wherein, when L=0cm, be applicable to the system that stirring intensity is bigger and the reaction time is longer; When L =L ₀ +gcm is suitable for systems with low stirring intensity and short reaction time.

Claims (8)

1. An integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles in a fluid, characterized in that the device includes a rectangular parallelepiped reactor (3) made of a magnetically conductive material that is placed obliquely, close to the The upper and lower surfaces of the cuboid reactor (3) are respectively equipped with a group of magnets (A) and magnets (B) that are vertical to its upper and lower surfaces to reciprocate up and down, and the magnets (A) and magnets ( B) It consists of bar magnets parallel to the upper and lower surfaces of the cuboid reactor (3), the spaced bar magnets are connected and kept in the same direction of motion, and the direction of motion of adjacent bar magnets is opposite; the cuboid reactor (3) ) high end is connected with the feeder (11), and the lower end of the cuboid reactor (3) is provided with a discharge port (5) and a vertical particle discharge pipe (9) connected with the discharge port (5). A baffle (4) is suspended on the upper wall of the rectangular parallelepiped reactor (3) above the discharge pipe (9); The lower end is connected; a pair of rotating rollers (2) rotating clockwise and rotating rollers (8) rotating counterclockwise are installed on both sides near the upper end of the particle discharge pipe (9). The rotating rollers (2) and (8) The ring-shaped rollers formed by the butt joint of the semi-circular magnetic ring (6) and the semi-circular magnetic isolation ring (61) are installed respectively on the roller wall, and rotate with the rotation of the rotating rollers (2) and (8), and the rotating roller (2 ), the relative position of the semicircular annular magnetic ring (6) on (8) remains consistent all the time. 2. The integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles in a fluid according to claim 1, characterized in that the cuboid reactor (3) is made of stainless steel, glass or plastic. 3. The integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles in a fluid according to claim 1, characterized in that the elongated magnets in the magnet group (A) and the magnet group (B) It is a strip type permanent magnet. 4. The integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles in a fluid according to claim 3, characterized in that the elongated magnets in the magnet group (A) and the magnet group (B) are for generating 4000 Oersted permanent magnet. 5. The integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles in a fluid according to claim 1, characterized in that, the semi-circular magnetic ring (6) is a semi-circular permanent magnet that produces 4000 Oersted magnetic ring. 6. The integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles in fluid according to claim 1, characterized in that the elongated magnets in the magnet group (A) and the magnet group (B) correspond to The lateral position stagger distance of the strip magnet is L, 0≤L≤L ₀ +8cm, where L ₀ is the length of the transverse section of the bar magnet. 7. The integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles in a fluid according to claim 3, characterized in that the elongated magnets in the magnet group (A) and the magnets in the magnet group (B) The lateral position stagger distance of the strip magnet is L, 0≤L≤L ₀ +8cm, where L ₀ is the length of the transverse section of the bar magnet. 8. The integrated device for catalytic reaction and continuous separation of ultrafine magnetic particles in a fluid according to claim 4, characterized in that the elongated magnets in the magnet group (A) and the magnets in the magnet group (B) The lateral position stagger distance of the strip magnet is L, 0≤L≤L ₀ +8cm, where L ₀ is the length of the transverse section of the bar magnet.

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