Method for controlling flow volume of coal/kerosene slurry, and apparatus for producing upgraded brown coal

Patent metadata

Field	Value
Publication number	US-10112127-B2
Application number	US-201414767991-A
Country	US
Kind code	B2
Filing date	Apr 2, 2014
Priority date	Apr 26, 2013
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A method and apparatus that deterioration of the flow state of a coal/kerosene slurry while preventing the damage caused by overloading to thereby achieve excellent solid-liquid separation performance. In a solid-liquid separation supplying a dehydrated coal/kerosene slurry to a decanter-type centrifugal separator to separate the coal/kerosene slurry into a solid fraction and a liquid fraction, an opening degree target value is determined on the basis of the difference between a target value and an actually measured value of a torque that acts on a screw conveyor of the decanter-type centrifugal separator, and the opening degree of a flow volume control valve, which is arranged in the middle of a supply line for supplying the coal/kerosene slurry into the decanter-type centrifugal separator, is adjusted to the opening degree target value.

First claim

The invention claimed is:

1. A method for controlling the flow volume of coal/kerosene slurry in a solid-liquid separation process of supplying dehydrated coal/kerosene slurry to a decanter-type centrifugal separator and separating the coal/kerosene slurry into a solid fraction and a liquid fraction, comprising:
deciding an opening degree target value on the basis of the difference between a torque target value and a value of a torque acting on a screw conveyer of the decanter-type centrifugal separator measured by a torque detection sensor;
adjusting the opening degree of a flow control valve to the opening degree target value, wherein the flow control valve is arranged in the middle of a supply line for supplying the coal/kerosene slurry into the decanter-type centrifugal separator;
driving the decanter-type centrifugal separator; and
adjusting the torque target value on the basis of the rotary torque detected by the torque detection sensor.

2. A method for controlling the flow volume of coal/kerosene slurry according to claim 1 , wherein the opening degree of the flow control valve increases and decreases at a predetermined cycle of opening and closing of the flow control valve.

Assignees

• Kobe Steel Ltd
• Kobe Steel Ltd

Inventors

• Kinoshita Shigeru
• Watanabe Hiroki

Classifications

• B04B13/00

  Control arrangements specially designed for centrifuges; Program control of centrifuges (control arrangements for feed, charge or discharge B04B11/00) · CPC title

• C10L2290/58

  Control or regulation of the fuel preparation of upgrading process · CPC title

• C10L2290/50

  Screws or pistons for moving along solids · CPC title

• B01D21/262 Primary

  by using a centrifuge · CPC title

• C10L2290/54

  Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel · CPC title