High speed injector with an improved steam valve

• US 10,654,010 B2
• Filed: 12/13/2017
• Issued: 05/19/2020
• Est. Priority Date: 12/13/2016
• Status: Active Grant

• Current Assignee: Andritz Aktiebolag Co.
• Original Assignee: Andritz Aktiebolag Co.
• Inventors: Magnusson, Åsa
• Primary Examiner(s): Hopkins, Robert A
• Application Number:
  US16/468,517
• Publication Number:
  US 20200009516A1
• Time in Patent Office: 888 Days
• Field of Search: 261 76
• CPC Class Codes: B01F 2035/99 Heating
• CPC Class Codes: B01F 2101/47 Mixing of ingredients for making paper pulp, e.g. wood fibres or wood pulp
• CPC Class Codes: B01F 2215/0431 Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof
• CPC Class Codes: B01F 25/31331 Perforated, multi-opening, with a plurality of holes
• CPC Class Codes: B01F 25/31333 Rotatable injectors
• CPC Class Codes: B01F 25/314 wherein additional components are introduced at the circumference of the conduit
• CPC Class Codes: B01F 25/31424 with a plurality of perforations aligned in a row perpendicular to the flow direction
• CPC Class Codes: B01F 25/31433 being rotatable, e.g. placed on a rotatable housing or conduit
• CPC Class Codes: B01F 25/4311 the baffles being adjustable
• CPC Class Codes: B01F 25/4335 Mixers with a converging-diverging cross-section
• CPC Class Codes: B01F 35/00 Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
• CPC Class Codes: B01F 35/2211 Amount of delivered fluid during a period
• CPC Class Codes: B01F 35/222 of the operation of the driving system, e.g. torque, speed or power of motors; of the position of mixing devices or elements
• CPC Class Codes: B01F 35/833 Flow control by valves, e.g. opening intermittently
• CPC Class Codes: B01F 35/91 using gas or liquid injected into the material, e.g. using liquefied carbon dioxide or steam
• CPC Class Codes: F04B 13/02 of two or more fluids at the same time
• CPC Class Codes: F04B 7/0046 for rotating distribution members
• CPC Class Codes: F16K 15/035 with a plurality of valve members
• CPC Class Codes: F16K 3/04 with pivoted closure members
• CPC Class Codes: F16K 47/045 and the closure member being rotatable
• CPC Class Codes: F16K 5/0407 : with particular plug arrangements, e.g. particular shape or built-in means

Abstract

A valve comprising a valve spindle housing located in the side of the chamber and including a first fluid inlet and a first fluid outlet, and a cylinder open along a portion of a longitudinal axis of the cylinder and rotatably mounted in the valve spindle housing. The cylinder is positioned in one position so that the cylinder completely obstructs the valve spindle housing outlet, not allowing any fluid to pass around the cylinder. The cylinder walls are solid except for having openings through a portion of the cylinder, so that when rotated to a closed position, the solid portion of the cylinder fully obstructs the valve spindle housing outlet, and when rotated to an open position, the first fluid can pass into the inside of the cylinder and then through the openings and out of the valve spindle housing.

Claims

1. An apparatus for mixing a first fluid into a flow path of a second fluid, said apparatus comprising:

a chamber, which encloses the flow path and which includes a first inlet for receiving the second fluid, a second inlet arranged downstream of the first inlet and receiving the first fluid, as well as an outlet arranged downstream of the second inlet for discharging a mixture of the first fluid and the second fluid, said flow path extending from the first inlet to the outlet and said second inlet opening into the flow path, a throttle body, which is pivotally arranged inside the chamber for controlling the flow area of the flow path; and

pivoting means, for pivoting the throttle body for said controlling of the flow area, the pivoting means being adapted to pivot the throttle body, so that the flow area decreases with a decreasing flow rate of the second fluid and increases with an increasing flow rate of the second fluid in order to maintain a flow velocity of the second fluid at the second inlet within a predetermined range, wherein the throttle body is in the form of a flap that has a first end that is pivotally arranged in the chamber and a second end that is free, the free end being directly adjacent the second inlet so that the flap maintains the flow rate of the second fluid at the second inlet in a desired range,

the second inlet including a valve comprising

a valve spindle housing located in the side of the chamber and including a first fluid inlet and a first fluid outlet, and

a cylinder open along a portion of a longitudinal axis of the cylinder and rotatably mounted in the valve spindle housing, the cylinder being positioned in one position so that the cylinder completely obstructs the valve spindle housing outlet, not allowing any fluid to pass around the cylinder, the cylinder walls being solid except for having openings through a portion of the cylinder, so that when rotated to a closed position, the solid portion of the cylinder fully obstructs the valve spindle housing outlet, and when rotated to an open position, the first fluid can pass into the inside of the cylinder and then through the openings and out of the valve spindle housing.

2. A valve in accordance with claim 1 wherein the cylinder is about a half cylinder.

3. A valve in accordance with claim 1 wherein the valve spindle housing outlet is defined by an opening having an edge, and the cylinder is positioned closely adjacent the edge so that when the cylinder is rotated, the edge clears away accumulated material over the cylinder openings on the outside of the cylinder.

4. The apparatus according to claim 1, the first end being pivotally arranged, via an axle, at a base portion of the chamber.

5. The apparatus according to claim 4, wherein the apparatus comprises at least one compressively loaded lever arm arranged on the axle.

6. The apparatus according to claim 5, the pivoting means comprising a pneumatic cylinder, which is adapted to produce the compressive load on the lever arm.

7. The apparatus according to claim 1, wherein the chamber has a width and a top and wherein the second inlet is in the chamber top, and wherein the flap has a width substantially equal to the chamber width.