Method and system for the thermal treatment of dispersible raw material

Patent metadata

Field	Value
Publication number	US-2017260089-A1
Application number	US-201515509795-A
Country	US
Kind code	A1
Filing date	Sep 9, 2015
Priority date	Sep 11, 2014
Publication date	Sep 14, 2017
Grant date	—

Abstract

A method for the thermal treatment of dispersible raw material may inovlve introducing raw material into a riser tube that is perfused by hot gases and thermally treating the raw material with the hot gases. Furthermore, the method may inovle feeding a fuel to the riser tube. The fuel may initially dwell in a fuel-conditioning region on a bearing face, where the fuel comes into contact with a part of the hot gas that is mixed with the raw material. Consequently, the fuel is dried and/or at least partially de-gassed and/or at least partially reacted and subsequently transferred into the riser tube.

First claim

1 .- 12 . (canceled).

13 . A method for thermal treatment of dispersible raw material, the method comprising:
introducing raw material into a riser tube that is perfused by hot gases; thermally treating the raw material in the riser tube with the hot gases; feeding a fuel into a fuel-conditioning region and onto a bearing face disposed in a conditioning chamber that leads into the riser tube, wherein at least 50% of the hot gases that come into contact with the fuel is formed by a part of the hot gases that is mixed with the raw material and deflected into the conditioning chamber, whereby as a result the fuel is at least one of
dried,
partially or completely de-gassed, or
partially or completely reacted; and
transferring the fuel into the riser tube.

14 . The method of claim 13 wherein the fuel is fed onto the bearing face mechanically or by gravity.

15 . The method of claim 13 further comprising conveying the dried, partially or completely de-gassed, or partially or completely reacted fuel mechanically or pneumatically along the bearing face before being transferred into the riser tube.

16 . The method of claim 13 further comprising setting in a targeted manner an amount of the hot gases that is mixed with the raw material and comes into contact with the fuel in the fuel-conditioning region by adding an oxygen-containing gas.

17 . The method of claim 13 further comprising decelerating or completely stopping a combustion reaction of the fuel on the bearing face by using an inert material.

18 . A system for thermal treatment of dispersible raw material, the system comprising:
a riser tube that is perfusable by hot gases; means for introducing raw material into the riser tube; and a fuel-conditioning region that comprises means for adding fuel, a bearing face for the fuel, and means for conveying the fuel along the bearing face and transferring the fuel into the riser tube, wherein the fuel-conditioning region is connected to the riser tube such that a part of the hot gases that is mixed with the raw material reaches the fuel-conditioning region and comes into contact with the fuel, whereby the fuel is at least one of
dried,
partially or completely de-gassed, or
partially or completely reacted.

19 . The system of claim 18 wherein the means for adding the fuel comprises at least one of a spiral conveyor, a gate, a pump, a tappet, a chute, a cellular wheel sluice, or a flap system.

20 . The system of claim 18 wherein the means for conveying and transferring the fuel into the riser tube are formed in a shape of at least one of:
gates or tappets for mechanically conveying, or
air-surge apparatuses or blowers for pneumatic conveying.

21 . The system of claim 18 further comprising a propulsion jet nozzle disposed in the fuel-conditioning region for deflecting the part of the hot gases that is mixed with the raw material into the fuel-conditioning region.

22 . The system of claim 18 wherein a ratio of a diameter of the riser tube to a depth of the bearing surface is in a range from 5 to 1.5. (New) The system of claim 18 wherein a ratio of a diameter of the riser tube to a depth of the bearing surface is in a range from 5 to 1.5.

23 . The system of claim 18 wherein a ratio of a diameter of the riser tube to a depth of the bearing surface is in a range from 5 to 1.5. (New) The system of claim 18 wherein a ratio of a diameter of the riser tube to a depth of the bearing surface is in a range from 3 to 1.5.

24 . The system of claim 18 wherein the bearing face comprises at least one of:
at least two successive steps, or
a table and a step that adjoins the table.

25 . The system of claim 18 wherein the fuel-conditioning region comprises a conditioning chamber configured in a portion of the riser tube that is disposed so as to be oblique to a vertical, wherein the bearing face comprises an outwardly offset wall region of the riser tube.

Assignees

• Thyssenkrupp Ind Solutions Ag
• Thyssenkrupp Ag

Inventors

• Klegraf Daniel
• Frie Sebastian
• Brinkschulte Henning

Classifications

• F27B7/34

  Arrangements of heating devices · CPC title

• F23G2206/201

  with an industrial furnace · CPC title

• F27B7/2033

  with means for precalcining the raw material · CPC title

• F27B7/20

  Details, accessories or equipment specially adapted for rotary-drum furnaces · CPC title

• C04B7/4446 Primary

  the fuel being treated in a separate gasifying or decomposing chamber, e.g. a separate combustion chamber · CPC title