CN112173721A

CN112173721A - Operation method for pneumatic conveying and sending tank for powdery materials

Info

Publication number: CN112173721A
Application number: CN202010870824.XA
Authority: CN
Inventors: 陈锦; 何明
Original assignee: Wuhu New Universal Environmental Sci Tech Co ltd
Current assignee: Wuhu New Universal Environmental Sci Tech Co ltd
Priority date: 2018-07-02
Filing date: 2018-07-02
Publication date: 2021-01-05
Also published as: CN108792630B; CN108792630A

Abstract

The invention provides an operation method for a powdery material pneumatic conveying sending tank, and relates to the technical field of machinery. This a sending tank for powdery material air conveying, including sending the jar body, the top fixed mounting that sends the jar body has the charge level indicator, the middle intercommunication that sends jar body top has charge-in pipeline, the top of sending the jar body switches on there is exhaust duct, the top of sending the jar body switches on there is the admission line, admission line fixedly connected with tonifying qi pipeline. This a sending jar for powdery material air conveying, through the injection pipe, the support, the cooperation of casing, under the effect of material pressure difference, the material after the fluidization passes through the injection pipe at a high speed, because of the too fast velocity of flow makes the pressure on the surface of slider reduce, be full of by atmosphere between casing and the slider, under the effect of atmospheric pressure, the slider is promoted to the cross sectional area that the air current passed through has been reduced, simultaneously because of the restriction of support, prevented that the slider from breaking away from, follow the material and get into the pipeline of supplying gas, destroy the pipeline.

Description

Operation method for pneumatic conveying and sending tank for powdery materials

Technical Field

The invention relates to the technical field of machinery, in particular to an operation method for a powdery material pneumatic conveying sending tank.

Background

The pneumatic conveying technology originates from the first half of the 19 th century, has the advantages of being airtight, safe, clean, easy to realize continuous automatic operation and the like, is widely applied to the fields of energy, chemical engineering, metallurgy, medicine, food processing and the like, in recent years, compared with dilute phase conveying, dense phase conveying technology is more widely applied, sending tank type pneumatic conveying is one of effective measures for realizing dense phase conveying, material conveying is carried out by utilizing fluidization characteristics of powder, and the pneumatic conveying technology has the characteristics of high conveying solid-to-gas ratio, low conveying speed, simple structure, convenience in maintenance and the like.

According to existing experimental theory, the conveying speed of material increases along with the increase of pipe diameter, and the mass flow and the solid-gas ratio of material are positive correlation with injection velocity simultaneously, and along with the increase of injection velocity, the mass flow and the solid-gas ratio of material all can increase, but current conveyor relies on the pressure boost to change the injection velocity of material indirectly, not only consumes extra energy, has also promoted manufacturing cost indirectly.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an operation method for a powdery material pneumatic conveying sending tank, which solves the problem that a pneumatic conveying device relies on pressurization to improve the injection speed.

Technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: an operation method for a powder material pneumatic conveying sending tank comprises a sending tank body, wherein a material level meter is fixedly mounted at the top of the sending tank body, a feeding pipeline is communicated with the middle of the top of the sending tank body, an exhaust pipeline is communicated with the top of the sending tank body, an air inlet pipeline is communicated with the top of the sending tank body, an air supply pipeline is fixedly connected with the air inlet pipeline, the air supply pipeline is fixedly connected with a T-shaped pipeline through a first air valve, the T-shaped pipeline is fixedly connected with the air supply pipeline through a second air valve, an injection pipe is communicated with the upper portion of the air supply pipeline and fixedly connected with the sending tank body through a third air valve, the injection pipe comprises a shell, a movable support, a sliding block and an air valve switch, the shell is integrally formed on the outer wall of the injection pipe, and the movable support is movably mounted on the left side and the right side of the inner wall of the shell, the front end of each movable support is fixedly provided with a sliding block, the outer surface of the shell is movably provided with an air valve switch, the right side of the bottom of the sending tank body is communicated with a fluidization pipeline, and the fluidization pipeline is fixedly connected with an air supply pipeline through a third air valve.

Furthermore, the exhaust pipeline and the air inlet pipeline are installed at the top of the sending tank body in a symmetrical mode by taking the feeding pipeline as a symmetrical axis.

Furthermore, the sealing ring of adaptation is fixedly installed at the junction of admission line and tonifying qi pipeline.

Furthermore, the exhaust pipeline is externally connected with an air filter matched with the exhaust pipeline.

Furthermore, an opening matched with the sliding block is formed in the inner wall of the injection pipe.

Furthermore, the sliding blocks are semicircular, and the two sliding blocks are matched with each other to form a whole circle.

The working principle is as follows: during the use, send powdery material into sending jar inside through charge-in pipeline, when the material level indicator shows that the material volume has reached sending jar body internal volume 90% continuously sending the material, the pay-off in-process, all pneumatic valves are in the closed condition, send the inside air of jar body and replace to external air cleaner through the exhaust duct, discharge after filtering. After the feeding is finished, an external air compressor is started, a second air valve and a fourth air valve are opened, compressed air passes through a T-shaped pipeline and enters an air supply pipeline through the second air valve, the compressed air is fed into a fluidized pipeline through the fourth air valve and is conveyed through the fluidized pipeline, the compressed air also pressurizes the inside of a sending tank body while fluidizing the powdery material inside the sending tank body, when the pressure inside the sending tank body reaches the requirement, the second air valve and the fourth air valve are closed simultaneously, a third air valve is opened, and the powder-to-material in a fluidized state inside the sending tank body enters the air supply pipeline through an injection pipe and the third air valve to be conveyed under the action of the pressure. Meanwhile, the air is continuously fed into the air supply pipeline to keep the pressure inside the sending tank body, in the process of conveying materials, due to the high-speed flow of air, the pressure on the surface of the sliding block is reduced, and at the moment, an air valve switch arranged on the surface of the shell is in an open state, so that the sliding block is extruded inwards under the action of the atmospheric pressure, the cross-sectional area of the air flow is reduced, the injection speed of the materials is increased, and the conveying efficiency of the materials is improved.

The injection pipe comprises a shell, a movable support, a sliding block and a gas valve switch, wherein the shell is integrally formed on the outer wall of the injection pipe, the movable supports are movably mounted on the left side and the right side of the inner wall of the shell, the sliding block is fixedly mounted at the front end of each movable support, a gas valve switch is movably mounted on the outer surface of the shell, a fluidization pipeline is communicated with the right side of the bottom of the sending tank body, and the fluidization pipeline is fixedly connected with the gas supply pipeline through a third gas valve.

Advantageous effects

Compared with the prior art:

this a sending jar for powdery material air conveying, through the injection pipeline, the movable support, a housing, cooperation between the pneumatic valve switch, the material is at the transportation process, under the effect of pressure difference, the material after the fluidization passes through the injection pipeline at a high speed and gets into the pipeline of supplying gas, this in-process again, because of the too fast velocity of flow makes the pressure on the surface of slider reduce, the pneumatic valve switch is in the on-state this moment, be full of by the atmosphere between casing and the slider, under the effect of atmospheric pressure, the slider is promoted, thereby the cross sectional area that the air current passed through has been reduced, simultaneously because of the restriction of the movable support, the slider has been prevented to break away from, follow the material and get into the pipeline of supplying gas.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of an injector structure according to the present invention.

In the figure: 1 sending tank body, 2 level meters, 3 feeding pipelines, 4 exhaust pipelines, 5 air inlet pipelines, 6 air supply pipelines, 7 first air valves, 8T-shaped pipelines, 9 second air valves, 10 air supply pipelines, 11 third air valves, 12 injection pipes, 13 shells, 14 movable supports, 15 sliding blocks, 16 air valve switches, 17 fluidization pipelines and 18 fourth air valves.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-2, an embodiment of the present invention provides an operation method for a powder material pneumatic conveying sending tank, including a sending tank body 1, a level indicator 2 is fixedly installed on the top of the sending tank body 1, a feeding pipeline 3 is communicated with the right middle of the top of the sending tank body 1, an exhaust pipeline 4 is communicated with the top of the sending tank body 1, the exhaust pipeline 4 is externally connected with an air filter adapted to the exhaust pipeline 4, an air inlet pipeline 5 is communicated with the top of the sending tank body 1, the exhaust pipeline 4 and the air inlet pipeline 5 are installed on the top of the sending tank body 1 in a symmetrical manner with the feeding pipeline 3 as a symmetry axis, the air inlet pipeline 5 is fixedly connected with an air supply pipeline 6, a sealing ring adapted to the connection position of the air inlet pipeline 5 and the air supply pipeline 6 is fixedly installed, the air supply pipeline 6 is fixedly connected with a T-shaped pipeline 8 through a first air valve 7, the T-shaped pipeline 8 is fixedly connected with an air, an injection pipe 12 is communicated above the air supply pipeline 10, the injection pipe 12 is fixedly connected with the sending tank body 1 through a third air valve 11, the injection pipe 12 comprises a shell 13, a movable support 14, a slide block 15 and an air valve switch 16, the shell 13 is integrally formed on the outer wall of the injection pipe 12, the movable supports 14 are movably mounted on the left side and the right side of the inner wall of the shell 13, the slide block 15 is fixedly mounted at the front end of each movable support 14, the slide blocks 15 are semicircular, the two slide blocks 15 are mutually matched to form a whole circle, an opening matched with the slide block 15 is formed in the inner wall of the injection pipe 12, the air valve switch 16 is movably mounted on the outer surface of the shell 13, a fluidization pipeline 17 is communicated with the right side of the bottom of the sending tank body 1, the fluidization pipeline 17 is fixedly connected with the air supply pipeline 10 through a fourth air valve 18, when in use, powdery materials are sent into the sending tank body, continuously feeding the materials until the material level meter 2 displays that the volume of the materials reaches 90% of the internal volume of the sending tank body 1, wherein all air valves are in a closed state in the feeding process, air in the sending tank body 1 is replaced to an external air filter through an exhaust pipeline 4 and is exhausted after being filtered, after the feeding is finished, an external air compressor is started, a second air valve 9 and a fourth air valve 18 are opened, the compressed air enters an air supply pipeline 10 through a T-shaped pipeline 8 through the second air valve 9, the compressed air is fed into a fluidization pipeline 17 through the fourth air valve 18, the compressed air fluidizes the powdery materials in the sending tank body 1 and pressurizes the inside of the sending tank body 1 through the conveying of the fluidization pipeline 17, when the pressure in the sending tank body 1 reaches the requirement, the second air valve 9 and the fourth air valve 18 are closed at the same time, the third air valve 11 is opened, the powder-to-material in a fluidized state in the sending tank body 1 enters the air supply pipeline 10 through the injection pipeline 12 and the third air valve 11 to be conveyed out under the action of pressure, meanwhile, air is continuously fed into the air through the air inlet pipeline 5 to maintain the pressure in the sending tank body 1, in the process of conveying the material, the pressure on the surface of the sliding block 15 is reduced due to high-speed flow of the air, and at the moment, the air valve switch 16 arranged on the surface of the shell 13 is in an open state, so that the sliding block 15 is inwards extruded under the action of atmospheric pressure, the cross-sectional area of air flow is reduced, the injection speed of the material is increased, the conveying efficiency of the material is increased, and meanwhile, due to the limitation of the movable support 14, the sliding block 15 is prevented from being separated, the material is fed into the air supply pipeline.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An operation method for a powdery material pneumatic conveying sending tank is characterized in that: sending the jar including sending a jar body (1), the top fixed mounting who sends jar body (1) has charge level indicator (2), the positive middle intercommunication that sends jar body (1) top has charge-in pipeline (3), the top of sending jar body (1) is passed through exhaust duct (4), the top of sending jar body (1) is passed through and is had admission line (5), admission line (5) fixedly connected with tonifying qi pipeline (6), tonifying qi pipeline (6) are through first pneumatic valve (7) and T shape pipeline (8) fixed connection, T shape pipeline (8) are through second pneumatic valve (9) and pneumatic duct (10) fixed connection, the top intercommunication of pneumatic duct (10) has injection pipe (12), injection pipe (12) are through third pneumatic valve (11) and send jar body (1) fixed connection, injection pipe (12) include casing (13), The automatic conveying device comprises movable supports (14), sliding blocks (15) and air valve switches (16), wherein a shell (13) is integrally formed on the outer wall of the injection pipe (12), the movable supports (14) are movably mounted on the left side and the right side of the inner wall of the shell (13), the sliding block (15) is fixedly mounted at the front end of each movable support (14), the air valve switches (16) are movably mounted on the outer surface of the shell (13), a fluidization pipeline (17) is communicated with the right side of the bottom of the sending tank body (1), and the fluidization pipeline (17) is fixedly connected with an air supply pipeline (10) through a fourth air valve (18); the exhaust pipeline (4) and the air inlet pipeline (5) are symmetrically arranged at the top of the sending tank body (1) by taking the feed inlet (3) as a symmetry axis; the joint of the air inlet pipeline (5) and the air supplementing pipeline (6) is fixedly provided with an adaptive sealing ring; the exhaust pipeline (4) is externally connected with an air filter matched with the exhaust pipeline; an opening matched with the sliding block (15) is formed in the inner wall of the injection pipe (12); the sliding blocks (15) are semicircular, and the two sliding blocks (15) are matched with each other to form a whole circle;

the operation method of the sending tank is as follows:

s1, closing all air valves, and continuously feeding the powdery material into the sending tank body 1 through the feeding pipeline 3 until the material level indicator 2 shows that the volume of the material reaches 90% of the internal volume of the sending tank body 1;

s2, starting an external air compressor, opening a first air valve 7, a second air valve 9 and a fourth air valve 18, conveying compressed air to the sending tank body 1 through the T-shaped pipeline 8, the air conveying pipeline 10 and the fluidizing pipeline 17, fluidizing the powdery material in the sending tank body 1, and pressurizing the inside of the sending tank body 1;

s3, when the pressure inside the sending tank body 1 meets the requirement, the second air valve 9 and the fourth air valve 18 are closed at the same time;

s4, opening the third air valve 11 and the air valve switch 16, continuously feeding air into the air inlet pipeline 5 to keep the pressure inside the sending tank body 1, inwards extruding the slide block 15, and simultaneously feeding the fluidized powder-to-material inside the sending tank body 1 into the air feeding pipeline 10 through the injection pipeline 12 and the third air valve 11 under the action of pressure to be conveyed out.