PLANT FOR THE CONTROLLED-SPEED PNEUMATIC TRANSPORT OF GRANULAR MATERIAL AND CONVEYANCE SPEED CONTROL PROCESS

• US 20130209180A1
• Filed: 01/28/2013
• Published: 08/15/2013
• Est. Priority Date: 06/12/2007
• Status: Abandoned Application

• Current Assignee: Moretto S.p.A. (Faita SA)
• Original Assignee: Moretto S.p.A. (Faita SA)
• Inventors: MORETTO, RENATO
• Application Number:
  US13/752,299
• Publication Number:
  US 20130209180A1
• Time in Patent Office: Days
• US Class Current: 406/153
• CPC Class Codes: B65G 53/24 Gas suction systems
• CPC Class Codes: B65G 53/66 Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material controlling the flow of coal firing systems C21B5/003
• CPC Class Codes: Y10T 137/0396 Involving pressure control
• CPC Class Codes: Y10T 137/86187 Plural tanks or compartments connected for serial flow

Abstract

The invention relates to a plant for the transport of granular material comprising at least one container for granular material to be transported, at least one receiver-meter group, at least one conveyance duct, depressurization-pressurization means arranged to suction/inject a gaseous medium from/into said at least one container, and at least one vacuum duct between a receiver-meter group and said depressurization-pressurization means, thereby creating a flow of said granular material and said gaseous medium in said at least one conveyance duct and a flow of gaseous medium between said at least one receiver-meter group and said depressurization-pressurization means.

Claims

1. A plant for the transport of plastic granular material, comprising:

at least one container for plastic granular material to be transported,

at least one or more receiver-meters one or more conveyance ducts each of which being in fluid connection with said at least one container and said at least one or more receiver meters,

depressurization structure for creating a relative vacuum,

at least one vacuum duct in fluid connection with said depressurization structure and said at least one or more receiver-meters,

each of said one or more conveyance ducts being in fluid connection with said at least one vacuum duct through said at least one or more receiver-meters,

a speed detection structure located in each of said vacuum ducts,

an electronic speed detection control with structure in communication with said speed detection structure,

said depressurization structure, and said at least one or more receiver-meters,

and a cleaning valve in fluid connection with each of said conveyance ducts,

wherein a flow of plastic granular material from each of said containers can be individually and automatically adjusted.

2. A plant according to claim 1, wherein said depressurization structure comprises at least one rotatable component actuated by an electric motor and a power adjusting structure having at least one rotation speed variation device of at least one rotating component of said depressurization structure.

3. A plant according to claim 2, wherein said power adjusting structure comprises an inverter to vary the frequency of power supply current to said electric motor in said depressurization structure.

4. A plant according to claim 1, wherein said depressurization structure comprises at least one vacuum pump.

5. A plant according to claim 1, wherein said speed detection structure comprises measuring structure of air speed.

6. A plant according to claim 5, wherein said speed detection structure comprises at least one flow rate meter.

7. A plant according to claim 1, comprising at least one reduced pressure storage tank arranged upstream of at least one depressurization structure and in fluid communication with at least one vacuum duct of at least one receiver-meter.

8. A plant according to claim 7, comprising, downstream of said at least one tank, at least one filtering structure through which fluid suctioned from said at least one tank is caused to flow.

9. A plant according to claim 8, comprising:

a differential pressure meter structure arranged to measure possible load losses due to obstruction of said at least one filtering structure and to generate respective electrical signals to be sent to electronic control unit.

10. A plant according to claim 9, comprising:

a meter structure of the fluid flow rate,

a pressure meter structure to measure the pressure in a respective vacuum duct and to send respective signals to the input of said electronic control unit structure, and

valve structure arranged to maintain a correct reduced pressure or vacuum level in a respective vacuum line as well as in a respective receiver-meter.

11. A plant according to claim 1, comprising in each conveyance line, a respective detection structure of the speed of the granular material which moves inside its respective conveyance duct, said detection structure being intended to send a signal to said electronic control unit structure.

12. A plant according to claim 1, comprising a user interface video unit and data insertion structure, said user interface being intended to store, in said electronic control unit structure, treatment parameters and characteristics related to the granular material(s) to be treated.

13. A plant according to claim 1, wherein said electronic control unit structure comprises a storage portion designed to store characteristic data of the transport speed progression of specific granular materials.