Char recovery system and char feeding hopper

Patent metadata

Field	Value
Publication number	US-9388349-B2
Application number	US-201214237378-A
Country	US
Kind code	B2
Filing date	Aug 10, 2012
Priority date	Aug 15, 2011
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

The present invention includes: a char feeding hopper body that feeds separated char toward a coal gasifier; a char communicating tube that communicates with a bottom portion of the char feeding hopper body and extends in a vertical axis direction; fluid gas feeding means that is provided at a bottom portion side of the char feeding hopper body and feeds fluid gas to an inside thereof; a radiation source section that emits γ-rays toward an inside of the char communicating tube in which a level of the char reaches a level H 2 which is the same level as a level H 1 of the char in the char feeding hopper as a result of feeding of the fluid gas; and a γ-ray detector that is provided along a vertical axis direction of the char communicating tube and detects the emitted γ-rays.

First claim

The invention claimed is:

1. A char recovery system for recovering char from product gas, the char being an unreacted carbonaceous raw material and the product gas being generated by gasification of the carbonaceous raw material in a gasifier, the char recovery system comprising:
separation means for separating the char from the product gas;
a char bin for recovering the separated char;
a char discharge line for feeding the recovered char;
at least one char feeding hopper for receiving the char from the char discharge line; and
a char feeding line for feeding the char from the char feeding hopper toward the gasifier, wherein
the char feeding hopper includes:
a char feeding hopper body for feeding separated char toward the gasifier;
a communicating tube for communicating with a bottom portion of the char feeding hopper body, the communicating tube extending in a vertical axis direction;
fluid gas feeding means provided at a bottom portion side of the char feeding hopper body, for feeding fluid gas to an inside thereof; and
a level meter for measuring a volume of the char in the char feeding hopper as a char amount (feeding amount/discharge amount), the level meter including:
a radiation source section for emitting γ-rays toward an inside of the char communicating tube in which a level of the char reaches the same level as a level of the char in the char feeding hopper body as a result of feeding of the fluid gas; and
a γ-ray detector provided in the vertical axis direction of the char communicating tube, for detecting the emitted γ-rays.

2. A char recovery system for recovering char from product gas, the char being an unreacted carbonaceous raw material and the product gas being generated by gasification of the carbonaceous raw material in a gasifier, the char recovery system comprising:
separation means for separating the char from the product gas;
a char bin for recovering the separated char;
a char discharge line for feeding the recovered char;
at least one char feeding hopper for receiving the char from the char discharge line; and
a char feeding line for feeding the char from the char feeding hopper toward the gasifier, wherein
the char feeding hopper includes:
a char feeding hopper body for feeding separated char toward the gasifier;
a first casing tube inserted into the char feeding hopper body through a side wall thereof:
a second casing tube provided at least above or below the first casing tube in a vertical axis direction thereof and inserted into the char feeding hopper body through the side wall thereof; and
a level meter for measuring a volume of the char in the char feeding hopper as a char amount (feeding amount/discharge amount), the level meter including:
a radiation source section provided in the first casing tube, for emitting γ-rays toward an inside of the char feeding hopper body; and
a γ-ray detector provided in the second casing tube, for detecting the emitted γ-rays.

3. The char recovery system according to claim 2 , further comprising cooling means in each of the first and second casing tubes.

4. The char recovery system according to claim 1 , wherein
a plurality of sets of the γ-ray radiation source section and γ-ray detection section are installed vertically along the char communicating tube,
among the plurality of sets of the γ-ray radiation source section and γ-ray detection section, a set thereof on an introduction side of fluid gas is used for constituting a reference measurement level meter, and
a char measurement area of the reference measurement level meter is always filled with the char.

5. The char recovery system according to claim 2 , wherein
a reference measurement level meter including a set of the radiation source section and γ-ray detector is installed at a lower portion in the char feeding hopper body, and
a char measurement area between the radiation source section and γ-ray detector is always filled with the char.

Assignees

• Koyama Yoshinori
• Shibata Yasunari
• Shinada Osamu
• Yokohama Katsuhiko
• Sakae Taketoshi
• Nishimura Koji
• Nakayama Naoto
• Mitsubishi Heavy Ind Ltd

Inventors

• Koyama Yoshinori
• Shibata Yasunari
• Shinada Osamu
• Yokohama Katsuhiko
• Sakae Taketoshi
• Nishimura Koji
• Nakayama Naoto

Classifications

• C10K1/02 Primary

  Dust removal · CPC title

• C10J2300/1807

  Recycle loops, e.g. gas, solids, heating medium, water · CPC title

• C10J3/506

  for entrained flow gasifiers · CPC title

• C10J2300/0959

  Oxygen · CPC title

• Y02E20/18

  Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS] · CPC title