Dynamic Particle Separator

• US 20140373492A1
• Filed: 01/02/2013
• Published: 12/25/2014
• Est. Priority Date: 01/03/2012
• Status: Active Grant

• Current Assignee: DWC AS
• Original Assignee: DWC AS
• Inventors: Arefjord, Anders Mathias
• Granted Patent: US 9,821,257 B2
• Time in Patent Office: Days
• US Class Current: 55/462
• CPC Class Codes: B01D 45/12 by centrifugal forces centrifuges B04B; cyclones B04C
• CPC Class Codes: B01D 45/16 generated by the winding course of the gas stream , the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
• CPC Class Codes: B04C 11/00 Accessories, e.g. safety or control devices, not otherwise provided for , e.g. regulators, valves in inlet or overflow ductingwith electrostatic precipitating arrangements B03C3/14
• CPC Class Codes: B04C 5/081 Shapes or dimensions
• CPC Class Codes: B04C 5/14 Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations provided with a great number of slits or perforations B04C5/10
• CPC Class Codes: B04C 5/18 with auxiliary fluid assisting discharge
• CPC Class Codes: B04C 5/185 Dust collectors
• CPC Class Codes: B04C 9/00 Combinations with other devices, e.g. fans, expansion chambers, diffusors, water lockswith filters B01D50/00

Abstract

A dynamic particle separator is described for cyclone separation of sand from a gas stream in connection with petroleum related production of oil and gas, where the separator comprises a housing (14) containing as cyclone tank (4) that is equipped with an upper inlet opening (1) for the gas stream and an upper and a lower outlet opening (2,12) for export of gas and particles, respectively, from the tank (4). The cyclone tank (4) is formed, at least in an internal area around the inlet opening (1), with an upper and downwardly directed conical shape (4a) that increases in diameter, and where the upper conical shape (4a) thereafter has a transition into an inverse, lower conical shape (4b) that converges towards the lower outlet opening (12),

Claims

1. Dynamic particle separator for cyclone separation of sand from as was stream in connection with petroleum related production of oil and gas, where the separator cot a housing containing a cyclone tank that is equipped with an upper inlet opening for the gas stream and an upper and a lower outlet opening for the export of gas and particles, respectively, from the tank

wherein

the cyclone tank is formed, at least in an internal area around the inlet opening, with an upper and downwardly directed conical shape that increases in diameter, and

where the upper conical shape thereafter has a transition into an inverse, lower conical shape, that converges towards the lower outlet opening.

2. Separator according to claim 1, wherein the upper and lower conical shape are separated by a circular-cylindrical belt.

3. Separator according to claim 1, wherein the lower outlet opening is formed as a pipe socket, where the pipe socket is equipped at the bottom with an angled and leak proof end surface and with an outlet opening in the side wall of the pipe socket.

4. Separator according to claim 1, wherein the upper inlet opening is equipped with an adjustable shutter opening arranged to regulate the speed of the vas stream in the cyclone tank.

5. Separator according to claim 4, wherein the shutter opening is arranged to be adjusted based on a pressure drop over the inlet opening.

6. Separator according to claim 1, wherein the cyclone tank is an in an upper chamber in the housing where the chamber is closed at the bottom by a plate placed over the lower outlet opening, and where the upper chamber, about the cyclone tank is filled and pressurised by a pressure medium, such as oil.

7. Separator according to claim 6, wherein a pressure sensor is placed between the upper chamber and a lower chamber, where the pressure sensor is arranged to register changes in the pressure difference as an indication of a pressure drop in the upper chamber.

8. Separator according to claim 7, wherein the pressure sensor is connected to a display and/or an alarm appliance.

9. Separator according to claim 1, wherein the housing comprises a lower chamber, in which the lower outlet opening ends up, and which is equipped with a collecting bucket with an open top for the collection of separated particles.

10. Separator according to claim 9, wherein the collecting bucket is placed in a load cell, arranged to register the amount of collected particles in the bucket.

11. Separator according to claim 9, wherein a silting device is placed in the collection bucket, were the silting device is connected to a pipe that urns out of the housing and where a silting process for the export of particles through the pipe starts on a signal from the load cell.

12. Separator according to claim 11, wherein the pipe is a double walled pipe that extends down into the bucket, where an outer, longitudinally running annular space of the pipe is connected to a water inlet for the supply of water to the bucket and in which separated particles are exported through an inner part of the pipe and out via an outlet.

13. Separator according to claim 11, wherein the silting process is arranged to be controlled externally by a control device, were the control device regulates the supply of water, the silting up of particles and the export of particles and water.

14. Separator according to claim 10, wherein a silting device is placed in the collection bucket, where the silting device is connected to a pipe that runs out of the housing and where a silting process for the export of particles through the pipe starts on a signal from the load cell.

15. Separator according to claim 12, wherein the silting process is arranged to be controlled externally by a control device, where the control device regulates the supply of water, the silting up of particles and the export of particles and water.