Pyrolyzed coal quencher, coal upgrade plant, and method for cooling pyrolyzed coal

Patent metadata

Field	Value
Publication number	US-10703976-B2
Application number	US-201514641684-A
Country	US
Kind code	B2
Filing date	Mar 9, 2015
Priority date	Mar 9, 2015
Publication date	Jul 7, 2020
Grant date	Jul 7, 2020

Abstract

A pyrolyzed coal quencher includes: a first water spray tube 79 that sprays water on pyrolyzed coal having a temperature of 300° C. or more obtained after pyrolyzing coal; a first cooling tube 80 that performs indirect cooling on the pyrolyzed coal obtained after spraying water by the first water spray tube 79 to a temperature of 100° C. or more; a second water spray tube 82 that sprays water on the pyrolyzed coal cooled by the first cooling tube 80 such that the pyrolyzed coal has a desired water content; and a second cooling tube 83 that performs indirect cooling on the pyrolyzed coal cooled by the first cooling tube 80 to a desired temperature of less than 100° C. Thus, the pyrolyzed coal can be promptly cooled and adjusted to a desired water content.

First claim

What is claimed is:

1. A pyrolyzed coal quencher comprising:
a first water spray section supplied with pyrolyzed coal having a temperature of 300° C. or more obtained after pyrolyzing coal, and configured to spray water on the pyrolyzed coal;
a first cooling tube provided on a downstream side in a flow direction of the pyrolyzed coal with respect to the first water spray section, supplied with the pyrolyzed coal obtained after spraying water by the first water spray section, and configured to indirectly cool the pyrolyzed coal being in contact with an outer periphery of the first cooling tube to a temperature of 100° C. or more by a first cooling medium flowing within the first cooling tube, so that a water content of the pyrolyzed coal is adjusted;
a second water spray section provided on a downstream side in the flow direction of the pyrolyzed coal with respect to the first cooling tube, supplied with the pyrolyzed coal cooled by the first cooling tube, and configured to adjust an amount of water and spray the adjusted amount of water on the pyrolyzed coal such that the pyrolyzed coal has a desired water content, and
a second cooling tube provided on a downstream side in the flow direction of the pyrolyzed coal with respect to the second water spray section, the second cooling tube having an overlap with the second water spray section and supplied with the pyrolyzed coal cooled by the first cooling tube, and configured to perform indirect cooling on the pyrolyzed coal to a desired temperature of less than 100° C. by a second cooling medium flowing within the second cooling tube.

2. The pyrolyzed coal quencher according to claim 1 , wherein the first cooling medium has an inlet temperature of 50° C. or more to less than 100° C. when introduced into the first cooling tube.

3. The pyrolyzed coal quencher according to claim 2 , wherein the first cooling medium is boiler feed water.

4. The pyrolyzed coal quencher according to claim 1 , further comprising a first rotating vessel for receiving the pyrolyzed coal and rotating about an axis,
wherein the first water spray section and the first cooling tube are installed in the first rotating vessel.

5. The pyrolyzed coal quencher according to claim 1 , further comprising a second rotating vessel for receiving the pyrolyzed coal and rotating about an axis,
wherein the second water spray section and the second cooling tube are installed in the second rotating vessel.

6. A coal upgrade plant comprising:
a pyrolyzer for pyrolyzing coal, and
a pyrolyzed coal quencher according to claim 1 that cools the pyrolyzed coal pyrolyzed by the pyrolyzer.

7. A method for cooling pyrolyzed coal comprising:
a first water spraying step of spraying water on pyrolyzed coal having a temperature of 300° C. or more obtained after pyrolyzing coal;
a first cooling step of indirectly cooling the pyrolyzed coal obtained after spraying water on the pyrolzed coal in the first water spraying step and being in contact with an outer periphery of a first cooling tube to a temperature of 100° C. or more by a first cooling medium flowing within the first cooling tube, so that a water content of the pyrolyzed coal is adjusted;
a second water spraying step of adjusting an amount of water and spraying the adjusted amount of water on the pyrolyzed coal cooled in the first cooling step such that the pyrolyzed coal has a desired water content, and
a second cooling step of indirectly cooling the pyrolyzed coal obtained after spraying water on the pyrolyzed coal in the second water spraying step to a desired temperature of less than 100° C. by a second cooling tube supplied with the pyrolyzed coal cooled by the first cooling tube and by a second cooling medium flowing within the second cooling tube,
wherein the second cooling tube is configured such that there is an overlap section where the pyrolyzed coal is simultaneously subjected to spraying by water in the second water spraying step and indirect cooling by the second cooling tube in the second cooling step.

Assignees

• Mitsubishi Heavy Ind Ltd
• Mitsubishi Heavy Ind Eng Ltd

Inventors

• Honjo Shintaro
• Kunimune Kiyotaka
• Ito Motofumi
• Asahara Junji

Classifications

• C10L5/10

  with the aid of binders, e.g. pretreated binders · CPC title

• C10B57/10

  Drying · CPC title

• C10B39/10

  combined with agitating means, e.g. rotating tables or drums · CPC title

• C10B53/04

  of powdered coal · CPC title

• C10L5/04

  Raw material {of mineral origin} to be used; Pretreatment thereof {(pretreatment of fuels of non-mineral origin C10L5/40)} · CPC title