Method and arrangement for controlling a burner of a suspension smelting furnace

Patent metadata

Field	Value
Publication number	US-10746471-B2
Application number	US-201916675364-A
Country	US
Kind code	B2
Filing date	Nov 6, 2019
Priority date	May 29, 2017
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

A method and an arrangement for controlling a burner of a suspension smelting furnace. The burner includes a reaction gas feeding device, and a fine solids feeding device. The fine solids feeding device being at an upstream end of the fine solids feeding device pivotably supported in the reaction gas feeding device. The burner including by at least one first mechanical actuator configured to center the fine solids feeding device in the annular reaction gas outlet opening. Said at least one first mechanical actuator being in response to receiving the control signal configured to perform a centering action to center the fine solids channel in the annular reaction gas outlet opening.

First claim

The invention claimed is:

1. A method for controlling a burner of a suspension smelting furnace, wherein the burner is arranged at a top of a structure of a reaction shaft of the suspension smelting furnace and wherein the burner comprises:
a reaction gas feeding device, and a fine solids feeding device,
wherein the reaction gas feeding device substantially surrounds the fine solids feeding device so that an annular reaction gas channel is formed between the reaction gas feeding device and the fine solids feeding device, wherein the annular reaction gas channel has an annular reaction gas outlet opening,
wherein the fine solids feeding device has an annular fine solids channel having a fine solids outlet opening,
wherein the fine solids feeding device has an upstream end pivotably connected to the reaction gas feeding device, and
wherein the burner comprises at least one first mechanical actuator configured to center the fine solids feeding device in the annular reaction gas outlet opening,
the method comprising the steps of:
arranging at least two imaging apparatuses symmetrically with respect to a center line A of the burner,
producing images of a cross section of the annular reaction gas outlet opening with said at least two imaging apparatuses,
receiving images of the cross section of the annular reaction gas outlet opening from said at least two imaging apparatuses with a processing device,
performing an analyzing action of the images of the cross section of the annular reaction gas outlet opening by comparing the images of the cross section of the annular reaction gas outlet opening with a threshold image representing the cross section of the annular reaction gas outlet opening,
producing and sending a control signal to said at least one first mechanical actuator based on said analyzing action,
receiving said control signal by said at least one first mechanical actuator, and
performing a centering action to center the fine solids feeding device in the annular reaction gas outlet opening with said at least one first mechanical actuator in response to receiving the control signal.

2. The method according to claim 1 , wherein the at least one first mechanical actuator comprises at least one of an electric motor, a servo motor, a hydraulic motor, a magnetic motor, or a pneumatic motor and at least one of a mechanical screw, a mechanical shaft, or a rod driven by said at least one of the electric motor, the servo motor, the hydraulic motor, the magnetic motor, or the pneumatic motor.

3. The method according to claim 1 , further comprises the steps of:
providing a movable sleeve around the fine solids feeding device at the annular reaction gas outlet opening of the reaction gas channel,
providing at least one second actuator configured to move the movable sleeve along and with respect to the fine solids feeding device to change an area of the cross section of the annular reaction gas outlet opening of the reaction gas channel, and
changing the area of the cross section of the annular reaction gas outlet opening of the reaction gas channel by moving the movable sleeve along and with respect to the fine solids feeding device.

4. The method according to claim 3 , wherein the step of providing at least one second mechanical actuator comprises providing at least one of an electric motor, a servo motor, a hydraulic motor, a magnetic motor, or a pneumatic motor and at least one of a mechanical screw, a mechanical shaft, or a rod driven by said at least one of the electric motor, the servo motor, the hydraulic motor, the magnetic motor, and a or the pneumatic motor.

5. The method according to claim 1 , further comprising the step of configuring said at least one first mechanical actuator to tilt the fine solids feeding device with respect to the center line A of the burner.

6. The method according to claim 1 , further comprising the step of configuring the first mechanical actuator to tilt the fine solids feeding device with respect to the annular reaction gas outlet opening of the annular reaction gas channel of the reaction gas feeding device of the burner.

7. The method according to claim 1 , wherein:
the burner comprises a dispersion gas feeding device, and
the fine solids feeding device surrounds the dispersion gas feeding device so that the annular fine solids channel is formed between the fine solids feeding device and the dispersion gas feeding device, and the annular fine solids channel is annular and the fine solids outlet opening is annular.

8. The method according to claim 1 , wherein the burner is a concentrate or a matte burner.

9. The method according to claim 1 , wherein the suspension smelting furnace is a flash smelting furnace or a flash converting furnace.

10. An arrangement for controlling a burner of a suspension smelting furnace wherein the burner is arranged at the top structure of a reaction shaft of the suspension smelting furnace and wherein the burner comprises:
a reaction gas feeding device, and a fine solids feeding device,
wherein the reaction gas feeding device substantially surrounds the fine solids feeding device so that an annular reaction gas channel is formed between the reaction gas feeding device and the fine solids feeding device, wherein the annular reaction gas channel has an annular reaction gas outlet opening,
wherein the fine solids feeding device has a fine solids channel having a fine solids outlet opening,
wherein the fine solids feeding device has an upstream end pivotably connected to the reaction gas feeding device,
wherein the burner comprises at least one first mechanical actuator configured to center the fine solids feeding device in the annular reaction gas outlet opening,
wherein
at least two imaging apparatuses are symmetrically arranged with respect to a center line of the burner,
said at least two imaging apparatuses being configured to produce images of a cross section of the annular reaction gas outlet opening,
a processing device is configured to receive images from said at least two imaging apparatuses and configured to:
perform an analyzing action of the images of the cross section of the annular reaction gas outlet opening by comparing the images of the cross section of the annular reaction gas outlet opening with a threshold image representing the cross section of the annular reaction gas outlet opening; and
produce and send a control signal and provide the control signal to said at least one first mechanical actuator based on said analyzing action, and

said at least one first mechanical actuator being responsive to receiving the control signal and being configured to perform a centering action to center the fine solids channel in the annular reaction gas outlet opening.

11. The arrangement according to claim 10 , wherein:
a movable sleeve is arranged substantially around the fine solids feeding device at the annular reaction gas outlet opening of the reaction gas channel, and
at least one second actuator is configured to move the movable sleeve along and with respect to the fine solids channel to change the area of the cross section of the annular reaction gas outlet opening of the reaction gas channel.

12. The arrangement according to claim 11 , wherein:
the second mechanical actuators comprise at least one of an electric motor, a servo motor, a hydraulic motor, a magnetic motor, or a pneumatic motor and at least one of a mechanical screw, a mechanical shaft, or a rod driven by said at least one of the electric motor, the servo motor, the hydraulic motor, the magnetic motor, and a or the pneumatic motor.

13. The arrangement according to claim 10 , wherein:

Assignees

• Outotec Finland Oy

Inventors

• Laaninen Aki
• Romppanen Jaana
• Björklund Peter
• Sonninen Valtteri
• Jansson Jani

Classifications

• F27D2021/026

  using a video installation · CPC title

• F27D3/16

  Introducing a fluid jet or current into the charge (F27D3/18 takes precedence) · CPC title

• F27B15/10

  Arrangements of air or gas supply devices · CPC title

• F27B15/14

  Arrangements of heating devices · CPC title

• F23N2229/20

  Camera viewing · CPC title