RU2376232C1 - Device for pneumatic transport of powder-like medium from bins of ash-catchers - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: in the device for pneumatic transport of powder-like medium, containing source of air excess pressure communicated to receiver, sectional transmission pipe-line with feed pipe of air to its butt, distributive pipe, pipelines for air, electromagnetic valve with control pulse generator, for each bin of ash-catcher there are installed inlet branch pipe with located vertically saddle at outlet port, choke with air feed pipe to choke, located in casing. Bottom cavity of casing is communicated through the reducing sleeve with located horizontally saddle at outlet port, cavity of the second casing - to sectional transport pipeline. In cavity of the second casing there are located the second choke with feed pipe of air to choke. Each pipeline for air by its outlet end is communicated to inlet ends of feed pipes of air to chokes of two casings of each section, and by inlet - to distributional tube. At each choke, at surface adjacent to pipe of air feed it is fixed pressure tube with ability of enveloping by external surface of outlet end of air feed tube to choke at its mixing.

EFFECT: reliability enhancement.

1 dwg

Description

The invention relates to the field of power engineering and can be used for pneumatic transport of a powdery environment from bins or other storage containers.

A device is known for pneumatic conveying of a powdery medium, comprising a hopper communicated through a pipe segment with a container, in the lower part of which there is a fluidization unit, under which a section is installed connecting the cavity with the first section of the transport pipeline; this section contains in the lower part of the ascending section of the pipeline a fluidization unit, and the upper one is in communication with the unit for the removal of fluidizing air [1].

The disadvantage of this device is the inability of pneumatic transport over considerable distances, the complexity of the design, low reliability, significant gas flow for fluidization of a powdery medium.

The closest in technical essence to the proposed device is a device for pneumatic conveying of a powdery medium from hoppers of ash collectors, containing a source of excess air pressure, a sectional transport pipeline, a receiver, an electromagnetic valve with a control pulse generator, a distribution pipe, an air supply pipe to the end of the transport pipeline, a pipeline for air, for each hopper of the ash collector - an inlet pipe with a saddle at the outlet, a shutter with a pipe and air to the shutter arranged in the housing, the lower cavity connected to the transport conduit, associated with the hoppers sectional scrubbers through cavities of said housing with shutters and said inlets. Each valve is installed with the possibility of moving from the saddle of the inlet pipe to the output end of the air supply pipe to the valve, the input end of the air supply pipe to the transport pipe is connected through the distribution pipe to the inlet ends of the air supply pipe to the valve, and the air pipe through the electromagnetic valve to the receiver , the transport pipeline along its length is connected to the hoppers through the cavity of the housings with shutters and inlet pipes, the outlet ends of the air supply tubes to the shutters in pusah for each silo connected to the conduit for the air along the length of [2].

The disadvantage of this device is the low reliability of pneumatic transport over large distances with large hydraulic diameters of the inlet pipes and the transport pipeline, due to a partial reverse “slip” of air and powder medium into the hopper.

The technical result of the invention is to increase the reliability and length of pneumatic conveying.

The specified technical result is achieved by the fact that in the device for pneumatic transport of a powdery medium containing a source of excess air pressure, a receiver, an electromagnetic valve with a control pulse generator, a distribution tube, an air supply pipe to the end of the transport pipeline, for each ash collector hopper there is an inlet pipe with a saddle on an outlet, a shutter with an air supply tube placed in the housing, a transport pipeline, sectionally connected to the ash collector bins, each the throttle in the section is installed with the possibility of moving from the saddle of the inlet pipe to the outlet end of the air supply pipe to the valve, the inlet end of the air supply pipe to the transport pipe is connected through a distribution pipe and an electromagnetic valve to the receiver, in addition, a pressure pipe is introduced in each section for the ash bin each damper, a transition pipe with a saddle at the outlet, a second damper with an air supply tube, located in the second housing, an air pipe, which is connected by the output end to the inlet ends of the air supply tubes to the dampers of the two housings of each section, and to the inlet end to the distribution pipe, the inlet connecting to the transport pipe in series through the cavity of the housing, the adapter pipe, the second housing, to each valve on the surface of the adjacent pipe air supply, a pressure pipe is fixed with the possibility of covering on the outer surface of the output end of the air supply pipe to the damper when it moves, with a saddle in each section the inlet pipe is placed vertically, and the saddle of the adapter pipe is placed horizontally.

A device for pneumatic conveying of a powdery medium is shown in the drawing and contains a source of excess air pressure (not shown) communicated with the receiver 1, a sectional transport pipe 2 with a pipe 3 for supplying air to its end face, a distribution pipe 4, air pipes 5, an electromagnetic valve 6 s generator 7 control pulses.

For each hopper 8 of the ash collector, an inlet pipe 9 is installed with a vertically arranged saddle 10 at the outlet, a shutter 11 with an air supply pipe 12 to the shutter placed in the housing 13, the lower cavity of which is communicated through the transition pipe 14 with a horizontally mounted saddle 15 at the outlet, the cavity of the second housing 16 - with a sectional transport pipeline 2. In the cavity of the second housing there is a second damper 17 with a pipe 18 for supplying air to the damper. The flaps 11, 17 of each section are mounted to move from the seats, respectively, 10, 15 to the outlet ends of the tubes 12, 18 for supplying air to the flaps. Each air duct 5 is connected with the output end to the inlet ends of the air supply tubes to the dampers of the two housings of each section, and the inlet end to the distribution pipe 4. A pressure tube 19 is fixed on each surface 11, 17 of the adjacent adjacent air supply tube to be covered on the outer surface of the outlet end of the air supply tube to the valve when moving it.

The operation of the device is as follows. The powdery medium in each section comes from the ash collector hopper through the inlet pipe with a vertical saddle, determining the opening of the passage in the vertical saddle 10 by the shutter 11. Next, the powdery medium enters through the opening of the horizontal saddle 15 into the transport pipe 2 and fills the volume of the section due to gravitational forces. In the same way, sections of other ash collectors are filled.

After a cycle of filling the sections of the transport pipeline 2 with the powdered medium by the control pulse generator 7, a signal is generated to open the electromagnetic valve 6, which determines the pulsed emission of a portion of compressed air / gas / to the end of the transport pipeline 2 and the pulsed effect on the portions of the powdered medium in the transport pipeline. Almost simultaneously, when the solenoid valve 6 is opened, compressed air enters through each air pipe 5 to the outlet ends of the air supply pipes 12, 18 to the shutters 11, 17, which are covered at that moment / when the shutters are open / on the outer surface by the pressure tubes 19. In the cavity pressure pipes form a pulse pressure corresponding to the working pressure in the receiver, which leads to a quick overlap of the holes of the seats 10, 15 and the exclusion of the return air and powder medium from the sections Sportna conduit into the cavity 8 of the hopper ash collector. In addition, the compressed air coming from the pressure tube of the second housing 16, entering the transport pipeline, divides the piston-like formation of the powdered medium into portions, thereby reducing the required shear force of the piston-forming along the length of the transport pipeline / reaching 20 m /.

Compressed air coming from the pressure tube of the housing 13 forms a shutter from the powder medium in the cavity of the transition valve 14 to close the shutter 11 and prevent backflow into the cavity of the ash hopper 8.

The use of pulsed pressure for closing the shutters of individual pipelines 5 for air in each section increases the reliability of the device. For example, if a powdery medium is filled in one of the sections of the air supply pipe 11, 18 when pulsed pressure arrives through a common air pipe 5, pulsed purging / due to redistribution of resistances / will be carried out only in sections with air pipes 11, 18 not filled with powdery environment that will create an emergency.

Thus, by introducing a pressure pipe for each damper of the adapter pipe with a saddle at the outlet, a second damper with an air supply pipe located in the second body, and an air pipe for each section, an increase in the reliability of operation and the possibility of increasing the length of pneumatic conveying are achieved.

Information sources

1. RF patent №2164491, B65G 53/16, 1998

2. RF patent №2324638, B65G 53/04, 2006

Claims (1)

A device for pneumatic conveying of a powdery medium containing a source of excess air pressure, a receiver, an electromagnetic valve with a control pulse generator, a distribution pipe, an air supply pipe to the end of the transport pipe, for each ash collector hopper there is an inlet pipe with a seat at the outlet, a shutter with an air supply pipe located in the housing, a transport pipeline, sectionally connected to the ash collector bins, each damper in the section is mounted with the possibility of changing openings from the saddle of the inlet pipe to the output end of the air supply pipe to the shutter, the inlet end of the air supply pipe to the transport pipe is connected through a distribution pipe and an electromagnetic valve to the receiver, characterized in that in addition to each section for the ash collector there is a transition pipe with a saddle at the output openings, a second damper with an air supply tube, located in the second body, a pressure pipe for each damper, a pipe for air, which is connected with the output end to the running ends of the air supply tubes to the dampers of the two housings of each section, and the inlet - to the distribution tube, and the inlet pipe is connected in series with the transport pipe through the cavity of the housing, the transition pipe, the second housing, on each valve on the surface adjacent to the air supply pipe said pressure tube with the possibility of covering on the outer surface of the output end of the air supply tube to the valve when it is moving, while in each section the saddle of the inlet pipe offset vertically, and the adapter tube seat is horizontal.

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