TH100588A - Methods and machines for pneumatic conveying systems - Google Patents

Abstract

DC60 Method for conveying by sorting materials in pneumatic conveying systems such as waste conveying systems. In this method, the material to be conveyed is fed from one or more feed points and conveyed in the conveying pipe (100) by way of pressure difference to the receiving point where the material is separated from the conveying air in a separator (20). In this method, different types of material are fed from one or more feed points (61A, 61B, 61C) at a time and conveyed to the receiving area for at least part of the conveying movement in the same conveying pipe and in this method at least part of the conveying pipe (100) is cleaned between different material conveying processes or at least when required.

Claims (24)

OCR 08PV 1. Method for conveying by separating materials in an air-powered conveyor system, such as a waste conveyor system. In such a method, the material to be conveyed is fed from at least one feeding point and conveyed in the conveyor pipe (100) by way of pressure difference to the receiving point where the material is separated from the air used for conveying in a separator (20). It is characterized that in such a method, different types of material are fed from one or more feeding points (61A, 61B, 61C) at a time and conveyed to the receiving area for at least part of the conveying motion in the same conveyor pipe, and that in such a method, at least part of the conveyor pipe (100) is cleaned during the conveying process of different materials or at least when required. 2. The method under claim 1 is characterized by the fact that in the method at least a portion of the conveying pipe (100) is connected as part of a circuit in which the air used for conveying is circulated at least during the conveyance of material by at least one first pumping device such as a vacuum unit (3) and/or by at least one second pumping device such as a blower unit (4). 3. A method under claim 1 or 2 characterized by different materials being fed from separate feed points (61A, 61B, 61C) and/or different materials being fed at least partially from the same feed point. 4. Any of the methods under claims 1-3 that are characterized by the different types of materials being controlled to different guest devices (20) where they are separated from the air being conveyed. 5. Any of the methods under claims 1-4 are characterized in which the valve component (60) between the material feed points (61A, 61B, 61C) and the conveyor pipe (100) is closed, which is effective after a certain time after opening, so that the valve (60) of the preceding feed point remains open when the valve of the next feed point (61) is opened. 6. One of the methods under claims 1-5 is characterized by the provision that a pressure lower than atmospheric pressure is provided in the conveyor (100) at least at the point of the material feed points (61A, 61B, 61C) intended to be emptied. The feed points are emptied into the conveyor (100) using an emptying sequence in which the feed points (61A, 61B, 61C) closer to the separator (20) in the material conveying direction are emptied first, and then the same material feed points (61A, 61B, 61C) located somewhat further from the separator (20) in the material conveying direction are emptied. 7. Any of the methods under claims 1-6 that are characterized by the fact that in the method for cleaning the conveyor pipe, the cleaning path (75) is fed from the feeding point (72) and it reverses after the cleaning circulation to the separation device (20, 70) which yields a fairly good result in the same area as the feeding point (72). 8. Any of the methods under Reservations 1-7, which are characterized by the use of at least one cleaning ball or some other appropriate cleaning method for the pipe, such as the so-called "line pig" of the pipe, as the cleaning method. 75 9. Any of the methods under claims 1-7 that are characterized by the fact that in the method the cleaning pathway and/or cleaning agent and/or liquid is fed into the pipe from the feed point (72) for the cleaning pathway which is connected to the conveying pipe by a cleaning line (77) as a result of the pressure difference. 10. Any of the methods under claims 1–8 is characterized by the cleaning pathway and/or cleaning agent and/or liquid being circulated through a section of the cleaning tube (100) intended for cleaning to the separation device (20, 70), specifically the cleaning separator (70), where the cleaning pathway (75) and/or cleaning agent and/or liquid are separated from the transport air. 11. Any of the methods under claims 1-9 that are characterized by the cleaning pathway (75) and/or cleaning agent and/or fluid being controlled at the end of the cleaning flow, effectively by a three-way valve, such as a three-way valve (80) to a separate cleaning separator (70). 12. Any of the methods under claims 1-11 are characterized in that, in the method, after the cleaning stage, at least part of the conveyor tube (100) is filled and/or air dried by air circulation using a sonic air flow in the circuit, specifically by blowing in the circuit with at least one first pumping device such as a vacuum generator (3) and/or one second pumping device such as a blower (4). 13. Any of the methods under Claims 1-12 that are characterized by their use in connection with a waste transport system where different types of waste, such as mixed waste, paper or organic waste, are transported at that location. 14. An air-powered material conveying system, such as a waste conveying system, which consists of at least one feeding point (61) for material, specifically waste material; a material conveying pipe (100) which can be connected to the feeding point (61); a separator (20) in which the material to be conveyed is separated from the air used for conveying; and pathways (3, 4) for providing at least a pressure difference in the conveying pipe (100) during material conveyance, which is characterized by the fact that the system contains pathways for feeding different types of material from one or more feeding points (61A, 61B, 61C) at one time and for conveying them to a receiving area for at least part of the movement in the same conveying pipe (100); and that the system also contains cleaning pathways which are provided to clean at least part of the conveying pipe (100) between different material conveying processes or at least when required. 15. A pneumatic material conveying system according to claim 14 which is characterized that at least part of the conveying pipe (100) can be connected as part of a circuit where the air used for conveying is circulated at least during material conveyance by at least one first pump such as a vacuum unit (3) and/or by at least one second pump such as a blower unit (4). 16. A pneumatic material conveying system according to claim 14 or 15, which is characterized by a path for creating a pressure difference consisting of at least one first pumping device such as a vacuum unit (3) and/or one second pumping device such as a blower unit (4), the suction side of which can be connected to a separating component (20), in particular a cleaning separator (70), or to a conveying pipe (100) through an air inlet (105, 106, 79) connected to it. 17. An air-powered material conveying system according to any of the claims 14-16 which is characterized by the presence of a path (80) for changing the motion of the airflow used for conveying between two or more guest devices (20, 70). 18. Any pneumatic material conveying system under claims 14-17 that is characterized by the presence of a feed point (72) for a cleaning path which is connected to the conveyor by a cleaning tube (77) and where there is a valve component (76) for opening and closing the connection from the feed point to the conveyor. 19. A material handling system pursuant to one of the claims 14-18 that has the characteristic that the feed point (72) for the cleaning path and the cleaning separator (70) are placed in close proximity to each other, thus providing relatively good results in the same area. 20. A pneumatic material conveying system according to one of the claims 14-19 is characterized by the valve component (61C) between the material feed points (61A, 61B, 61B) and the conveyor pipe (100) being closed, which is effective after a certain time after opening, so that the valve (60) of the preceding feed point remains open when the valves of the next feed points (61A, 61B, 61C) are opened. 21. One of the material transfer systems pursuant to claims 14-30 is characterized by the system being arranged to provide pressure in the circuit with at least one pumping device such as a vacuum generator (3) and/or a blower (4) whose suction side is connected to the target in the circuit. 22. Any pneumatic material conveying system under claims 14-21 which is characterized by the presence of a means for filling at least part of the bore (100) with air and/or drying by the circulation of the air used in the circuit, especially by blowing in the circuit with at least one first pumping device such as a vacuum generator (3) and/or one second pumping device such as a blower (4). 23. Any pneumatic material handling system under any of the claims 14-22 is characterized by the use of a cleaning ball or some other cleaning pathway suitable for the conveyor tube (100), such as the so-called "line pik" of the tube, as a cleaning pathway (75). 24. An air-powered material conveying system pursuant to any one of the claims 14-23, which is characterized by the material conveying system being a waste conveying system in which different types of waste are different types of waste, such as mixed waste, paper waste or organic waste.