Flash tank with adjustable inlet

Patent metadata

Field	Value
Publication number	US-9103070-B2
Application number	US-201313747976-A
Country	US
Kind code	B2
Filing date	Jan 23, 2013
Priority date	Feb 13, 2012
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

A flash tank including: a closed interior chamber; a gas exhaust port coupled to an upper portion of the chamber; a liquid discharge port coupled to a lower portion of the chamber; an inlet nozzle attached to an inlet port of the chamber, wherein the inlet nozzle includes a flow passage, and a movable valve plate in the flow passage, wherein the valve plate has a first position which defines a first throat in the flow passage and a second position which defines a second throat having a smaller cross-sectional area than the first throat.

First claim

What is claimed is:

1. A flash tank comprising:
an interior chamber;
a gas exhaust port coupled to an upper portion of the chamber;
a liquid discharge port coupled to a lower portion of the chamber;
an inlet nozzle attached to an inlet port of the chamber, wherein the inlet nozzle includes a flow passage having a throat, and
a movable valve plate in the flow passage, wherein the valve plate has a first position which defines a first throat area of the throat in the flow passage and a second position which defines a second throat area having a smaller cross-sectional area than the first throat area.

2. The flash tank of claim 1 wherein the valve plate is a rectangular plate having planar surfaces bounded by edges.

3. The flash tank of claim 1 further comprising a hinge attached to a sidewall of the flow passage, wherein the hinge is attached to an upstream end of the valve plate and creates a pivoting axis for the valve plate.

4. The flash tank of claim 1 further comprising an actuator connected to the valve plate, wherein the actuator moves the valve plate to positions between the first and second positions.

5. The flash tank of claim 1 wherein the flow passage has a rectangular cross section.

6. The flash tank of claim 5 comprising an actuator having an extendible shaft connected to the valve plate to move the valve plate.

7. The flash tank of claim 1 further comprising an actuator connected to the valve plate, wherein the actuator moves the valve plate between multiple positions.

Assignees

• Andritz Inc

Inventors

• Hunt Tyson Bradford
• Grogan Richard M
• Vogel Keith
• Grace Todd S

Classifications

• D21C11/00 Primary

  Regeneration of pulp liquors {or effluent waste waters} · CPC title

• D21C7/14

  Means for circulating the lye · CPC title

• D21C7/10 Primary

  Heating devices · CPC title

• D21C7/12

  Devices for regulating or controlling · CPC title

• D21C11/063 Primary

  Treatment of gas streams comprising solid matter, e.g. the ashes resulting from the combustion of black liquor (evaporation of pulp liquors by direct contact with gases D21C11/103; post-combustion of gases D21C11/127) · CPC title