CN108067350B

CN108067350B - Magnetic separation device

Info

Publication number: CN108067350B
Application number: CN201711374909.3A
Authority: CN
Inventors: 杨良嵘; 冯冬; 惠俊峰; 刘会洲; 安震涛
Original assignee: Institute of Process Engineering of CAS
Current assignee: Institute of Process Engineering of CAS
Priority date: 2017-12-19
Filing date: 2017-12-19
Publication date: 2020-03-03
Anticipated expiration: 2037-12-19
Also published as: CN108067350A

Abstract

The invention belongs to the technical field of catalyst particle separation and recovery, and discloses a magnetic separation device, which comprises: the separation chamber is internally provided with two separation cavities, and the separation cavities are provided with a feed liquid inlet and a magnetic particle recovery port; the cylinder is hermetically arranged at the top of the separation cavity; and the magnet is positioned in the cylinder and can move up and down along the axial direction of the cylinder. According to the invention, the cylinder and the magnet which moves up and down in the cylinder are arranged in the separation cavity, so that the separation of the magnetic particle catalyst can be realized, and the continuous separation of the magnetic particle catalyst can be realized by arranging the two separation cavities, so that the separation efficiency is improved.

Description

Magnetic separation device

Technical Field

The invention relates to the technical field of catalyst particle separation and recovery, in particular to a magnetic separation device.

Background

The catalyst is a substance which can change the chemical reaction rate (increase or decrease) of a reactant without changing chemical equilibrium during a chemical reaction and has the quality and chemical property which are not changed before and after the chemical reaction. The method is widely applied to the technical processes in the fields of petrochemical engineering, bioengineering and the like. With the enhancement of environmental awareness and the continuous development of green chemistry, researchers pay more and more attention to the development of environment-friendly catalysts.

Although the addition of catalyst in industrial production greatly accelerates the reaction rate, the expensive waste catalyst increases the cost of the enterprise, so the recovery of catalyst particles becomes a necessary example. In the catalytic particle separation and recovery process, a filtering means is mostly adopted to recover the fine catalyst particles, so that the purposes of reducing the loss of expensive materials, improving the product quality and reducing the discharge of waste products can be achieved, and the standard of environmental protection is met. However, the problems of low recovery efficiency, easy loss caused by catalyst particle omission and the like exist in the filtration and recovery of catalyst particles, and particularly, the phenomenon that fine particles pass through filter cloth used for filtration can occur to cause unqualified catalyst particle recovery due to the small particle size of the catalyst with fine particles.

The solid particle catalyst has the advantages of high activity, high selectivity, mild reaction conditions, recyclability and the like, but is easy to encounter the problems of difficult separation and recovery and the like in the actual production. Therefore, in recent years, magnetic particles are introduced into a solid catalyst to endow the solid catalyst with magnetic mechanical properties, so that the solid catalyst has certain magnetism under the condition of keeping higher catalytic activity, and the theory of recycling by utilizing an external magnetic field becomes a research hotspot. The process for separating and recovering the magnetic particle catalyst by utilizing the magnetic field acting force can replace a filtering means, and the magnetic particle catalyst not only can realize the reutilization of resources, but also protects the environment, is an environment-friendly catalyst and is the development direction of future catalysts.

In practical application, in order to achieve good catalytic performance, a technical means of introducing magnetic particles with small particle size into the catalyst is often adopted, and the method can increase the contact area between the catalyst particles and reactants, so that the aim of achieving high-efficiency catalytic efficiency is facilitated, but meanwhile, the problems of difficult catalyst particle recovery, low reutilization rate, unnecessary waste and the like are caused.

The catalyst recovery method for the magnetic particles through the magnetic field acting force is various, in the process of recovering the magnetic particle catalyst through the magnet, the electromagnet can be used for recovering the magnetic particle catalyst, the magnetic field acting force exists when the electromagnet is electrified, after the magnet adsorbs the magnetic particle catalyst, the electromagnet loses magnetism after the electromagnet is powered off, and the magnetic particle catalyst is separated from the magnet, so that the separation and collection work of the magnetic particle catalyst is achieved. However, most of the existing equipment for separating the magnetic particle catalyst by the electromagnet has low separation efficiency, and the electromagnet needs to be switched on or off, so that the problem of high energy consumption exists.

Disclosure of Invention

The invention aims to provide a magnetic separation device, which can realize continuous separation of magnetic particle catalysts and improve the separation efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

a magnetic separation device, comprising:

the separation chamber is internally provided with two separation cavities, and the separation cavities are provided with a feed liquid inlet and a magnetic particle recovery port;

the cylinder is hermetically arranged at the top of the separation cavity;

and the magnet is positioned in the cylinder and can move up and down along the axial direction of the cylinder.

Preferably, the method further comprises the following steps:

the bracket is sleeved outside the cylinder in a sliding manner and is driven by the magnet to move;

and the tray is arranged on the support and used for plugging the feed liquid inlet.

Preferably, the two magnets move synchronously, and one moves upward while the other moves downward.

Preferably, the magnetic steel wire rope further comprises a driving assembly, wherein the driving assembly comprises two fixed pulleys, a steel wire rope wound on the outer sides of the two fixed pulleys and provided with two ends respectively connected with one magnet, and a driving motor for driving the two ends of the steel wire rope to move up and down.

Preferably, the two fixed pulleys are symmetrically arranged on two sides of the driving motor.

Preferably, the support comprises an arc-shaped iron sleeve which is adsorbed by a magnet and is arranged on the outer wall of the cylinder in a sliding and sticking mode, and a support body fixedly connected with the arc-shaped iron sleeve, and the tray is arranged at one end, which is not connected with the arc-shaped iron sleeve, of the support body.

Preferably, rags are adhered to the inner side wall of the arc-shaped iron sleeve.

Preferably, the two separation chambers are separated by a partition plate, and the two separation chambers share the magnetic particle recovery port.

Preferably, a water seal assembly is arranged at the magnetic particle recovery port and used for opening and closing the magnetic particle recovery port.

Preferably, the tray is provided with silicon rubber which can block the feed liquid inlet.

Preferably, the separation cavity is further provided with a water phase outlet, and the liquid after magnetic separation flows out from the water phase outlet.

The invention has the beneficial effects that:

through set up the drum in the separation intracavity and the magnet that reciprocates in the drum, can realize the separation to magnetic particle catalyst, through setting up two separation chambeies, can realize the continuous separation of magnetic particle catalyst moreover, improved separation efficiency.

The magnet moves to drive the support and the tray to move, so that the tray can block the feed liquid inlet, the switch of the feed liquid inlet can be controlled, a valve is not required to be installed, and the cost is saved.

Furthermore, the two magnets are driven to move by one steel wire rope, so that the two magnets can move up and down only by providing small power by the driving motor, and the energy consumption of the whole device can be effectively reduced. And the moving distance and the moving frequency can be adjusted by driving the motor, so that the moving distance and the moving frequency of the two magnets can be adjusted and controlled.

Drawings

FIG. 1 is a front view of a magnetic separation apparatus of the present invention;

FIG. 2 is a top view of the magnetic separation device of the present invention;

FIG. 3 is a schematic view of a hidden separation chamber of the magnetic separation apparatus of the present invention;

FIG. 4 is a schematic view of a magnetic separation apparatus according to the present invention in a state where one of the separation chambers is not separated;

FIG. 5 is a schematic view of another separation chamber of the magnetic separation device of the present invention in a state where separation is not performed.

In the figure:

1. a separation chamber; 2. a cylinder; 3. a magnet; 4. a support; 5. a tray; 6. a drive assembly; 7. a water seal assembly; 11. a separation chamber; 12. a feed liquid inlet; 13. a magnetic particle recovery port; 14. a partition plate; 15. a water phase outlet; 41. a circular arc-shaped iron sleeve; 42. a frame body; 61. a fixed pulley; 62. a wire rope; 63. the motor is driven.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

The invention provides a magnetic separation device, as shown in fig. 1-5, the magnetic separation device comprises a separation chamber 1, a cylinder 2, a magnet 3, a bracket 4, a tray 5, a driving component 6 and a water seal component 7, wherein:

the separation chamber 1 is a cylindrical structure having an overall height of 3 m and an upper cylindrical structure having a diameter of 2 m. The lower part of separation chamber 1 is the toper structure, has set firmly a baffle 14 of length 2.8 meters, width 2 meters in its inside intermediate position, and this baffle 14 divides into the separation chamber 1 inside two separation chamber 11 that the symmetry set up, all is equipped with feed liquid import 12 in one side of every separation chamber 11, specifically, this feed liquid import 12 is connected with the external pipeline, and this feed liquid import 12 central point department of placing separation chamber 11 in downwards, and the feed liquid that contains magnetic particle catalyst gets into in separation chamber 11 through this feed liquid import 12.

The separation cavity 11 is further provided with a magnetic particle recovery port 13 for recovering the separated magnetic particle catalyst. In this embodiment, only one magnetic particle recovery port 13 is provided, and is disposed at the lower part of the separation chamber 1, which is in a conical structure, that is, the two separation chambers 11 of this embodiment share one magnetic particle recovery port 13, and the magnetic particle catalyst separated in each separation chamber 11 is recovered through the magnetic particle recovery port 13. Moreover, the present embodiment facilitates the automatic falling and stacking of the magnetic particle catalyst by providing the lower portion of the separation chamber 1 with a tapered structure, so as to facilitate the subsequent recovery operation.

It is understood that, in this embodiment, each separation chamber 11 may also be provided with one magnetic particle recovery port 13 as needed, and at this time, different types of magnetic particle catalysts may be recovered, that is, one device may simultaneously separate two types of magnetic particle catalysts. Of course, the same kind of magnetic particle catalyst may be collected, and in this case, two magnetic particle collecting ports 13 may be provided to collect the magnetic particle catalyst in a single separation chamber 11 as needed. In view of the manufacturing cost, the present embodiment preferably shares one magnetic particle recovery port 13.

In this embodiment, referring to fig. 1 and 2, each separation chamber 11 is provided with an aqueous phase outlet 15 at the upper end, and the aqueous phase outlet 15 is used for conveying separated feed liquid out. Specifically, holes are formed in the tops of the two separation chambers 11, the holes are communicated with an external pipeline to form a water phase outlet 15, and when the separation chambers 11 are filled with feed liquid in the separation chambers 11, the feed liquid after magnetic separation can flow out from the water phase outlet 15. After the magnetic separation in the separation chamber 11 is finished, the feed liquid remaining in the separation chamber 11 can flow out through the magnetic particle recovery port 13 together with the magnetic particle catalyst.

It can be understood that, in this embodiment, a water pump may be further disposed on the external pipeline connected to the water phase outlet 15, and the feed liquid magnetically separated in the separation chamber 11 is pumped out by the water pump.

As shown in fig. 1 and 2, the two cylinders 2 are provided and are respectively and hermetically arranged in the two separation chambers 11. Specifically, referring to fig. 2, a through hole is formed at the top of the separation chamber 11, one end of the cylinder 2 is open and is vertically welded at the periphery of the through hole, and the other end of the cylinder 2 is sealed in the separation chamber 11. In this example, the cylinder 2 had a diameter of 250mm and a height of 15 cm.

The magnet 3 is a cylindrical permanent magnet with a diameter of 220mm and a height of 50mm, the magnetic field strength of the magnet 3 is 4000A/m, and two magnets 3 are arranged and respectively placed in the two cylinders 2 and used for adsorbing the magnetic particle catalyst in the feed liquid. Specifically, this magnet 3 can reciprocate along drum 2 axial, when magnet 3 was located below extreme position (this embodiment is the bottom of drum 2), its adsorption affinity was the strongest, the magnetic particle catalyst can adsorb the bottom at drum 2 this moment, in-process when magnet 3 upwards moved, to the adsorption affinity of magnetic particle catalyst reduce gradually, when magnet 3 moved the top extreme position, magnetic particle catalyst self gravity can be greater than the magnetic field effort that receives this moment, the magnetic particle catalyst can drop from drum 2 bottom, and fall into the bottom of separation chamber 1. In this embodiment, by using the cylindrical permanent magnet, compared with the electromagnet 3 in the prior art, it is not necessary to turn on or off the power supply, so that the energy consumption can be effectively reduced. In this embodiment, the distance from the upper limit position to the lower limit position is 10cm, and the time required for the magnet 3 to complete one up-and-down movement is 5 minutes.

The magnet 3 is driven by a driving unit 6 to move up and down along the axial direction of the cylinder 2. Specifically, referring to fig. 3, the driving assembly 6 includes two fixed pulleys 61, a wire rope 62 and a driving motor 63, wherein the two fixed pulleys 61 are symmetrically disposed on two sides of the driving motor 63, and the axes of the two fixed pulleys 61 are located on the same horizontal plane. Wire rope 62 sets up horizontally, and its both ends are respectively around establishing in the outside of a fixed pulley 61 with the switching-over for vertical state, and this wire rope 62's both ends connect respectively in a magnet 3, and wire rope 62's intermediate position department connects in driving motor 63's output, rotates through driving motor 63, can drive wire rope 62 and control parallel transmission, and then wire rope 62 can drive magnet 3 and reciprocate. In this embodiment, only one driving motor 63 is provided, and when the driving motor drives the steel wire rope 62 to transmit left and right in parallel, one of the magnets 3 at the two ends of the steel wire rope 62 is in an upward moving state, and the other is in a downward moving state. Two magnets 3 are driven to move through one steel wire rope 62, and the steel wire rope 62 is driven to transmit through one driving motor 63, so that the two magnets 3 can move up and down only by providing small power through the driving motor 63, the energy consumption of the whole device can be effectively reduced, and the manufacturing cost of the whole device is further reduced.

In this embodiment, the driving motor 63 is a dc motor, and the dc motor drives the steel wire rope 62, so as to adjust the moving distance and the parallel moving frequency of the steel wire rope 62, thereby adjusting and controlling the moving distance and the moving frequency of the two magnets 3.

In this embodiment, when the driving motor 63 drives the steel wire rope 62 to move and further drives the two magnets 3 to move up and down, when one of the magnets 3 moves up, the other magnet 3 moves down, that is, by the structure of the driving assembly 6, different working states of the two separation chambers 11 can be realized. Specifically, referring to fig. 4 and 5, when the magnet 3 of one of the separation chambers 11 moves to the bottom of the cylinder 2 (i.e. the lower limit position, the separation chamber 11 on the right side in fig. 4, and the separation chamber 11 on the left side in fig. 5), the separation rate of the magnetic particle catalyst reaches the maximum value, at this time, the magnet 3 in the other separation chamber 11 is driven to move to the upper limit position, the separation rate of the magnetic particle catalyst therein reaches the minimum value, i.e. the separation of the magnetic particle catalyst is stopped, at this time, the magnetic particle catalyst in the separation chamber 11 receives the minimum magnetic force, and therefore the magnetic particles fall off to the magnetic particle recovery port 13 below the separation chamber 1. On the contrary, when the separation rate of the magnetic particle catalyst in the separation chamber 11 reaches the maximum value, the magnetic separation operation is stopped in the other separation chamber 11, and the separated magnetic particle catalyst falls off. The two states are states in which the magnets 3 are located at the upper limit position and the lower limit position of the moving track, respectively, and when the two magnets 3 move to any position except the upper limit position and the lower limit position, the two separation chambers 11 are in a separation working state of the magnetic particle catalyst.

In this embodiment, if the liquid material continuously enters the non-separated liquid material, the liquid material may overflow from the water phase outlet 15 without being separated, considering that when one of the magnets 3 moves up to the upper limit position, it does not have the magnetic separation function or the magnetic separation function is weak. In order to solve the above problem, the present embodiment is provided with a bracket 4 slidably sleeved outside the cylinder 2, and a tray 5 is installed at the lower end of the bracket 4, specifically:

as shown in fig. 3, the bracket 4 includes an arc-shaped iron sleeve 41 attached to the outer wall of the cylinder 2 by the magnet 3 and sliding, and a frame body 42 fixed to the arc-shaped iron sleeve 41, wherein the inner wall of the arc-shaped iron sleeve 41 is attached with rags, and the arc-shaped iron sleeve 41 can move up and down along with the magnet 3 by the attraction of the magnet 3 to the arc-shaped iron sleeve 41. Further, the outer wall of the cylinder 2 of the present embodiment is a smooth surface, which can ensure that the arc-shaped iron sleeve 41 can smoothly slide along the outer wall of the cylinder 2.

The frame body 42 is composed of four steel bars, the upper portion of the frame body 42 is connected with the arc-shaped iron sleeve 41, the lower portion of the frame body is connected with the tray 5, silicon rubber is arranged above the tray 5, the silicon rubber can block the feed liquid inlet 12, and the frame body has a good sealing effect. In this embodiment, the tray 5 is a circular tray 5, the area of the tray 5 is slightly larger than the cross-sectional area of the feed liquid inlet 12, and the area of the tray 5 may be 1.1 times of the cross-sectional area of the feed liquid inlet 12, so as to prevent the tray 5 from being too large and hindering the adsorbed and agglomerated magnetic particle catalyst from falling off.

Further, the tray 5 of the present embodiment is located right below the feed liquid inlet 12, so as to ensure that the tray 5 can accurately block the feed liquid inlet 12.

In this embodiment, by arranging the arc-shaped iron sleeve 41 and the tray 5, when the magnet 3 moves upwards to the upper limit position, the arc-shaped iron sleeve 41 moves upwards along with the magnet 3 and drives the tray 5 to block the feed liquid inlet 12, thereby preventing the unseparated feed liquid from continuously entering and being incapable of magnetic separation.

In this embodiment, a water seal assembly 7 is disposed at the magnetic particle recovery port 13, and the water seal assembly 7 is used for opening and closing the magnetic particle recovery port 13. That is, when the magnetic separation is performed in the separation chamber 11, the water seal assembly 7 closes the magnetic particle recovery port 13, and when the magnetic separation catalyst needs to be taken out, the water seal assembly 7 opens the magnetic particle recovery port 13, and then the magnetic separation catalyst is taken out.

The magnetic separation device of the embodiment can reduce the addition of separation equipment and save the cost while achieving higher separation efficiency by arranging the two separation cavities 11. Can realize continuous separation of the magnetic particle catalyst and improve the separation efficiency.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A magnetic separation device, comprising:

the separation chamber (1) is internally provided with two separation cavities (11), and the separation cavities (11) are provided with a feed liquid inlet (12) and a magnetic particle recovery port (13);

the cylinder (2) is hermetically arranged at the top of the separation cavity (11);

the magnet (3) is positioned in the cylinder (2) and can move up and down along the axial direction of the cylinder (2);

further comprising:

the bracket (4) is sleeved on the outer side of the cylinder (2) in a sliding manner and is driven by the magnet (3) to move;

the tray (5) is arranged on the bracket (4) and is used for plugging the feed liquid inlet (12);

the two magnets (3) move synchronously, and when one of them moves upwards, the other moves downwards.

2. A magnetic separation device according to claim 1, further comprising a driving assembly (6), wherein the driving assembly (6) comprises two fixed pulleys (61), a steel wire rope (62) wound around the two fixed pulleys (61) and having two ends connected to one magnet (3) respectively, and a driving motor (63) for driving the two ends of the steel wire rope (62) to move up and down.

3. A magnetic separation device according to claim 1, wherein the support (4) comprises an arc-shaped iron sleeve (41) which is attracted by the magnet (3) and slidably attached to the outer wall of the cylinder (2), and a frame body (42) which is fixedly connected to the arc-shaped iron sleeve (41), and the tray (5) is mounted on an end of the frame body (42) which is not connected to the arc-shaped iron sleeve (41).

4. A magnetic separation device according to claim 3 wherein rags are adhered to the inner side wall of the circular arc-shaped iron sleeve (41).

5. A magnetic separation device according to claim 1 wherein the two separation chambers (11) are separated by a partition (14) and the two separation chambers (11) share the magnetic particle recovery port (13).

6. A magnetic separation device according to claim 1, wherein a water seal assembly (7) is disposed at the magnetic particle recovery port (13), and the water seal assembly (7) is used for opening and closing the magnetic particle recovery port (13).

7. A magnetic separation device according to claim 1 wherein the tray (5) is provided with silicone rubber which is capable of plugging the feed liquid inlet (12).

8. A magnetic separation device according to claim 1, wherein the separation chamber (11) is further provided with a water phase outlet (15), and the liquid after magnetic separation flows out from the water phase outlet (15).