WO2020048482A1

WO2020048482A1 - Method and device for separating viscous material

Info

Publication number: WO2020048482A1
Application number: PCT/CN2019/104379
Authority: WO
Inventors: 过震文; 宰正浩; 徐斌; 孙文州; 章和嘉; 宰君浩
Original assignee: 上海市市政规划设计研究院有限公司
Priority date: 2018-09-07
Filing date: 2019-09-04
Publication date: 2020-03-12
Also published as: CN110586288A

Abstract

A method and device for separating a viscous material, comprising a mixed material spraying box (4) on an adjustable support base. The upper part of the mixed material spraying box (4) is a feed bin (1); an adjustable material control device (6) is provided at the bottom of the feed bin (1); a centrifugal blower (2) is provided at the rear part of the mixed material spraying box (4); one end of the centrifugal blower (2) is provided with an air jet tube (3); the adjustable material control device (6) is located above the air jet tube (3); the head of the mixed material spraying box (4) is a material spraying tube (5); the material spraying tube (5) extends into a material separation box (8); the interior of the material separation box (8) is N-shaped; the left oblique edge of the N shape is a coarse material impact plate (7), and the right edge of the N shape is a fine material impact plate (81); discharge ports for a coarse material and a fine material are correspondingly provided below the coarse material impact plate (7) and the fine material impact plate (81); the upper part of the material separation box (8) is connected to a cyclone separator (10); a powder discharge hopper is provided below the cyclone separator (10); the cyclone separator (10) is connected to the air inlet of the centrifugal blower (2) by means of a tube. The apparatus separates a viscous material by a method of air jet and impact, thereby improving the efficiency of next sorting.

Description

Method and device for dispersing viscous materials

Technical field

The invention relates to a method and a device for dispersing viscous materials.

Background technique

For viscous materials, powder and granules containing a certain amount of water (for example, 10-18%) are viscous and are wrapped with each other. It is difficult to directly sort the specific materials. Especially for the bottom slag generated by incineration of domestic garbage stoves or medical wastes, for such viscous materials, during the disposal of such viscous materials, it is necessary to sort out the metal objects contained in the slag. Diameters and shapes are different, especially small-sized (1-5 mm) metal objects are wrapped by viscous mud particles, and various existing sorting technologies (specific gravity sorting, magnetic separation, high-voltage electrostatic sorting, vortexing) are used. (Current sorting, etc.) directly sorting, it is difficult to meet the ideal requirements, it needs to undergo a certain pre-treatment. At present, the common pre-treatment method is to use water washing technology to make them lose their stickiness with each other, and then use the corresponding sorting The technology sorts and extracts specific things. However, the shortcomings of this water washing method are obvious, and the problem of water pollution during and after water washing needs to be solved; under the current situation of continuous attention to environmental protection, it is not conducive to popularization and promotion.

There are also existing technologies that do not wash water to disperse viscous materials. For example, the Chinese patent CN103118808B is used as a separation device. Although the dry method is used, the material is hit by a high-speed rotating drum on the impact plate to achieve Its dispersion effect. However, the efficiency and effectiveness of separation need to be further improved.

Summary of the Invention

The purpose of the present invention is to overcome the shortcomings of the prior art mentioned above, and propose a method and a device for dispersing viscous materials.

The specific technical solution of the present invention is:

A device for dispersing viscous materials includes a mixing spray box provided on an adjustable support. The upper part of the mixing spray box is a silo, and the bottom of the feed silo is provided with a controllable material device. The mixing The tail of the spray box is provided with a centrifugal blower, and one end of the centrifugal blower is provided with a gas spray pipe; the adjustable material device is above the gas spray pipe; the head of the mixed spray box is a spray pipe, and the spray The material pipe extends into the inside of the material distribution box. The inside of the material distribution box is N-shaped. The left oblique side of the N-shape is a coarse material impact plate, and the right side of the N-shape is a fine material impact plate. The coarse material impact plate and the fine material impact. The lower part of the plate is respectively provided with the feeding openings for coarse and fine materials; the upper part of the material distribution box is connected with a cyclone separator, and a powder hopper is arranged below the cyclone separator; the cyclone separator is connected with a pipe and a centrifugal blower. Air port connection.

The invention also proposes a method for dispersing dispersed viscous materials. The specific technical solution is:

A method for dispersing viscous materials. A material to be processed is uniformly dropped into a spray box through a supply bin, and is adsorbed by a high-speed airflow of a spray pipe in the box and sprayed to a forward mixed spray box. Bring materials to be processed with different particle sizes and spray them from the outlet of the spray tube at a speed greater than the set speed. During the process of the material being adsorbed and ejected from the outlet of the spray tube, the material room and the material and the box and the outlet tube Collisions occur between the walls, and are broken and dispersed; materials vary in quality from small to large, and are distributed from top to bottom on the section. The large particles at the lower part of the outlet section face the coarse material impact plate in the middle of the separation box. After being impacted again, the material was broken and dispersed, then fell to the coarse material outlet and entered the next coarse material processing process; the outlet ejected small particles of material that were not intercepted by the coarse material impact plate, and then hit the separation box. The upper side plate, that is, the fine material impact plate, is also impacted, causing the material to be broken and dispersed, and then dropped to the fine material outlet to enter the next fine material processing process; part of the fine powder in the gas, along with The gas is sucked away by the exhaust pipe on the top and enters the cyclone separator. After being separated by the cyclone separator, it is discharged from the bottom and separately enters the next powder processing step; or according to actual needs, the powder is mixed into the fine material and enters The next fine, powdery material treatment process; the gas discharged from the cyclone separator is introduced into the inlet of the centrifugal blower through a pipe as a jet gas source.

For both the pre-treatment and the post-treatment of the present invention, the eddy current method is used for post-treatment. The results show that for the non-metal sorting effect, if the method of the present invention is not adopted, the sorting efficiency is 35-40%. The efficiency is 75-85%.

The invention can also be applied to the treatment of various materials that have a certain viscosity and need to be dispersed.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a device connection for dispersing viscous materials according to the present invention.

In the picture:

1. Feed bin; 2. Centrifugal blower; 3. Gas injection tube; 4. Mixed spray box; 5. Spray tube; 6. Adjustable material device (baffle); 7. Coarse material impact plate; 8. Material distribution box; 81, fine material impact plate; 9, adjustable support; 10, cyclone separator.

detailed description

As shown in FIG. 1, the main structure of the device of the present invention is a set of improved “Venturi” ejector. The upper part of the ejector is provided with a feed bin 1 with a material control device, and the bottom of the silo is provided with an adjustable material device 6 The gas injection pipe 3 is connected to a medium and high pressure centrifugal blower 2; the front end of the gas injection pipe is deeply installed in the mixed spray box 4 on the adjustable support 9, and the outlet of the spray pipe 5 is deep into the distribution box 8 and It is connected with the material distribution box; the bottom of the material distribution box 8 is provided with two outlets of coarse and fine materials, and the middle is divided by a height-adjustable coarse material impact plate 7. The inside of the material distribution box is N-shaped, N-shaped The left oblique side is the coarse material impact plate, and the right side of the N shape is the fine material impact plate 81. The top of the material distribution box is provided with an exhaust outlet, which is connected by a pipe and the cyclone separator 10. The separated gas is piped Connected to the air inlet of the centrifugal blower, the fine powder produced by the cyclone separator 10 is discharged from the bottom.

A valve is installed at the inlet of the centrifugal blower 2 to adjust the system air volume and control the ejector outlet air speed;

There is a controllable material device 6 at the bottom of the feed bin to control the flow and adjust the blanking position;

After the basic position of the mixing spray box 4 is determined, the horizontal position can be adjusted by 0-10 degrees to adjust the landing point of the material spray;

The height of the coarse material impact plate 7 of the separation box can be adjusted to adjust the ratio of coarse and fine materials.

The operation of this device is as follows:

The material to be processed drops uniformly into the spray box through the supply bin, and is adsorbed by the high-speed air flow (large 60-80 m / s) of the spray pipe in the box and sprayed to the forward mixed spray box, and the air flow in the mixed spray box Carrying materials to be processed with different particle diameters of 0-15 mm, spraying from the outlet of the spraying pipe at a speed of more than 30 meters per second, the process of the material being adsorbed to the outlet, the material room and the material and the box, Collisions occur between the outlet pipe walls, which are broken and dispersed. With the effect of the jet air flow and the front and top suction air, the materials are distributed from small to large according to the quality difference, and are distributed above and below the cross section. Large particles of material under the exit cross section Directly opposite is the impact plate which is set in the appropriate position of the coarse material box of the separation box and can be adjusted up and down and angle, causing another impact, causing the material to be broken and scattered, and then falling to the coarse material outlet, and part of it splashes due to impact After passing through the impact class, it fell into the coarse material box due to gravity and entered the next processing stage; the outlet ejected small particles of material that were not intercepted by the coarse material impact plate, and hit the upper side plate on the rear of the separation box. , Ie fines The impact board is also impacted, causing the material to be broken and dispersed, and then dropped to the fine material outlet to enter the next fine material processing process; part of the fine powder in the gas is sucked by the exhaust pipe at the top along with the gas Go and enter the cyclone separator. After separation by the cyclone separator, it is discharged from the bottom and enters the next powder processing step separately. According to actual needs, the powder can also be mixed into the fine material and enter the next fine and powder processing. Process treatment; the gas discharged from the cyclone separator includes part of the evaporated water vapor, and part of it is introduced into the inlet of the centrifugal blower through the pipeline as a jet gas source.

The invention adopts the method of air jet injection and impact to disperse the bonding material to improve the efficiency of the next sorting. The actual use effect is as follows:

Dispersion effect of domestic garbage incinerator slag (already processed before) treated by this device:

Basic data of raw materials: moisture content: 12-14%: particle size 0-15 (mm).

For the above embodiments, the eddy current method post-processing is used for both the pre-treatment and the post-treatment of the present invention. The results show that for the non-metal sorting effect, if the method of the present invention is not used, the sorting efficiency is 35-40%. In the method of the invention, the sorting efficiency is 75-85%.

The present invention is different from the existing dispersing technology for viscous materials: compared with the technology of dispersing and processing the materials through water washing, and then extracting specific materials, the present invention does not use water in the entire process, avoiding the problems of subsequent sewage and sludge treatment. ; And the existing high-speed rotating drum on the impact plate to hit the material to achieve the technical effect of dispersing. Compared with the existing separation equipment, the CN103118808B mechanical mode with only two grades of coarse and fine materials is used. The invention uses air pressure separation to produce three grades of coarse, fine and powder modes. Although both are dry dispersion, they are fundamentally different; the striking technology schemes used are different, that is, the air jet and the drum striking plate are completely different. Due to the different mechanism of the separation of the coarse and fine powders, the results obtained Completely the opposite, the present invention adopts a negative pressure suction method at the rear end to improve the separation effect, and at the same time, the third stage of the fine powder is produced.

Claims

A device for dispersing viscous materials is characterized in that it comprises a mixing spray box provided on an adjustable support. The upper part of the mixing spray box is a silo, and the bottom of the feed silo is provided with adjustable materials. A centrifugal blower is provided at the tail of the mixing spray box, and a gas spray pipe is provided at one end of the centrifugal blower; the adjustable material device is above the gas spray pipe; the head of the mixing spray box is sprayed The spray tube extends into the inside of the material distribution box. The inside of the material distribution box is N-shaped. The left oblique side of the N-shape is a coarse material impact plate, and the right of the N-shape is a fine material impact plate. The coarse material impact plate. Under the position where the fine material hits the plate, coarse material and fine material discharge openings are respectively provided; the upper part of the distribution box is connected with a cyclone separator, and a powder hopper is arranged below the cyclone separator; the cyclone separator is connected with a pipe and The air inlet of the centrifugal blower is connected.
A method for dispersing viscous materials, which is characterized in that the material to be processed is uniformly dropped into a spray box through a supply bin, and is adsorbed by the high-speed air flow of a spray pipe in the box and sprayed to the mixing spray box forward, and the mixed spray The air flow in the material box carries materials to be processed with different particle sizes, and is ejected from the outlet of the nozzle at a speed greater than a set speed. During the process of the material being adsorbed and ejected from the outlet of the nozzle, the material room and the material and the box There is a collision between the body and the outlet pipe wall, and it is broken and dispersed. With different quality, the materials are distributed from small to large, and are distributed from top to bottom on the section. The large particles at the lower part of the outlet section are facing the middle of the separation box. The coarse material hits the plate and is impacted again, causing the material to break and disperse, and then falls to the coarse material outlet to enter the next coarse material processing process; the outlet ejects small particles of material that are not intercepted by the coarse material impact plate, and collides. To the upper side plate on the rear of the separation box, that is, the fine material hits the plate, it is also impacted, causing the material to be broken and dispersed, and then dropped to the fine material outlet to enter the next fine material processing process; part of the gas The powder, along with the gas, is sucked away by the exhaust pipe at the top and enters the cyclone separator. After being separated by the cyclone, it is discharged from the bottom and enters the next powder processing step separately; or the powder is mixed in according to actual needs In the fine material, it enters the next fine and powder processing procedure. The gas discharged from the outlet of the cyclone separator is introduced into the inlet of the centrifugal blower through the pipe as a jet gas source.