HIGH SPEED INJECTOR WITH TWO STAGE TURBULENCE FLAP

• US 20180117541A1
• Filed: 04/27/2016
• Published: 05/03/2018
• Est. Priority Date: 04/29/2015
• Status: Active Grant

• Current Assignee: Andritz Aktiebolag Co.
• Original Assignee: GL&V Luxembourg S.A.R.L
• Inventors: LINDSTRM, Anders, LMs, Axel
• Granted Patent: US 10,328,399 B2
• Time in Patent Office: Days
• CPC Class Codes: B01F 2101/47 Mixing of ingredients for making paper pulp, e.g. wood fibres or wood pulp
• CPC Class Codes: B01F 23/20 Mixing gases with liquids
• CPC Class Codes: B01F 23/23 by introducing gases into liquid media, e.g. for producing aerated liquids
• CPC Class Codes: B01F 23/2323 by circulating the flow in guiding constructions or conduits
• CPC Class Codes: B01F 25/00 Flow mixers; Mixers for falling materials, e.g. solid particles centrifugal mixers B04
• CPC Class Codes: B01F 25/314 wherein additional components are introduced at the circumference of the conduit
• CPC Class Codes: B01F 25/3141 with additional mixing means other than injector mixers
• CPC Class Codes: B01F 25/4311 the baffles being adjustable
• CPC Class Codes: B01F 25/431973 Mounted on a support member extending transversally through the mixing tube
• CPC Class Codes: D21C 9/1005 Pretreatment of the pulp, e.g. degassing the pulp

Abstract

An apparatus comprising a chamber enclosing a flow path of a first fluid and having a second inlet arranged downstream of the first inlet for receiving a second fluid. The apparatus further comprises a vertically adjustable throttle body an end portion comprising three parts, the first part being upstream of the second part, the third part being downstream of the second part, wherein, in an operating position, the second inlet is upstream of the third part of the throttle body and downstream of the first inlet and wherein the first part and the third part of the end portion are adapted to achieve a higher flow rate than the second part.

Claims

1. An apparatus for mixing a second fluid into a first fluid, the apparatus comprising:

a chamber enclosing a flow path of the first fluid, the chamber having a first inlet for receiving the first fluid and a second inlet arranged downstream of the first inlet for receiving the second fluid,

an outlet, arranged downstream of the second inlet, for discharging a mixture of said first fluid and said second fluid,

wherein the flow path of the first fluid extends from the first inlet to the outlet and the second inlet opens into the flow path of the first fluid;

a vertically adjustable throttle body having a first end disposed at a bottom portion of the chamber and a second end comprising an end portion;

wherein the throttle body is arranged inside the chamber, downstream of the first inlet and upstream of the second inlet, for controlling the flow area of the flow path, wherein the throttle body is adapted to be vertically adjustable in such a way that the flow area of the flow passage decreases with a decreasing flow rate of the first fluid and increases with an increasing flow rate of the first fluid,

the end portion of the throttle body comprising three parts, the first part being upstream of the second part, the third part being downstream of the second part;

wherein, in an operating position, the second inlet is upstream of the third part of the throttle body and downstream of the first inlet; and

wherein the first part and the third part of the end portion are adapted to achieve a higher flow rate than the second part.

2. The apparatus according to claim 1, further comprising spring means, disposed between a bottom side of the throttle body and the bottom portion of the chamber, the spring means being adapted to counteract the force exerted on the throttle body by the first fluid.

3. The apparatus according to claim 1 or 2, wherein the throttle body is pivotally arranged, with the first end of the throttle both connected to a pivotally arranged axis.

4. The apparatus according to any of claims 1 to 3, wherein the end portion of the throttle body is adapted such that the flow area at the first part and the third part is smaller than the flow area at the second part.

5. The apparatus according to any of claims 1 to 4, wherein the first part and the third part of the end portion are protrusions and the second part is an indentation.

6. The apparatus according to any of claims 1 to 5, wherein the end portion of the throttle body is located at the second inlet.

7. The apparatus according to any of claims 1 to 6, wherein the second inlet comprises a valve adapted for controlling the velocity of the second fluid at a point where the first fluid and the second fluid are mixed.

8. The apparatus according to any of claims 1 to 7, further comprising a baffle disposed downstream of the second inlet, the baffle being adapted to redirect the flow of the fluids.

9. The apparatus according to claim 8, wherein the baffle is further adapted to redirect the flow of fluids towards the outlet.

10. Apparatus according to any of claims 1 to 9, wherein the second inlet is arranged substantially perpendicular to the flow path of the first fluid.

11. Apparatus according to any of claims 7-10, wherein the valve is disposed adjacently to the top part of the chamber.

12. A method for mixing a second fluid into a first fluid, the method comprising:

causing the first fluid to flow in a chamber from a first inlet to an outlet, the chamber enclosing the flow path;

supplying the second fluid into the flow path of the first fluid via a second inlet of the chamber, the second inlet being arranged downstream of the first inlet and upstream of the outlet; and

causing a vertically adjustable arranged throttle body, having a first end disposed at a bottom part of the chamber and a second end comprising an end portion and being arranged in the flow path, downstream of the first inlet and upstream of the second inlet, to vertically adjust in order to control the flow area of the flow path, in such a way that the flow area decreases with a decreasing flow rate of the first fluid and increases with an increasing flow rate of the first fluid,

the end portion of the throttle body comprising three parts, the first part being upstream of the second part, the third part being downstream of the second part;

wherein, in an operating position, the second inlet is upstream of the third part of the throttle body and downstream of the first inlet; and

wherein the first pad and the third part of the end portion are adapted to achieve a higher flow rate than the second part.