US 12,121,903 B2
Slag crusher, gasifier, integrated gasification combined cycle, and assembly method of slag crusher
Kengo Shibata, Kanagawa (JP); Makoto Toyomaru, Kanagawa (JP); and Masashi Kitada, Kanagawa (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Appl. No. 17/269,632
Filed by Mitsubishi Power, Ltd., Yokohama (JP)
PCT Filed Dec. 17, 2019, PCT No. PCT/JP2019/049281
§ 371(c)(1), (2) Date Feb. 19, 2021,
PCT Pub. No. WO2020/129934, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 2018-239672 (JP), filed on Dec. 21, 2018.
Prior Publication US 2021/0339260 A1, Nov. 4, 2021
Int. Cl. B02C 1/00 (2006.01); B02C 23/16 (2006.01); B07B 1/46 (2006.01); C10J 3/48 (2006.01); C10J 3/52 (2006.01)
CPC B02C 1/005 (2013.01) [B02C 23/16 (2013.01); B07B 1/469 (2013.01); C10J 3/485 (2013.01); C10J 3/526 (2013.01); B02C 2023/165 (2013.01); C10J 2300/093 (2013.01); C10J 2300/1628 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A slag crusher that crushes slag generated by a combustor of a gasifier that gasifies carbonaceous feedstock and solidified in cooling water stored in a slag bath installed perpendicularly below the combustor, the slag crusher comprising:
a screen of a porous member provided so as to cross a drop direction of the slag and formed with a plurality of opening portions;
a spreader that is reciprocated in a predetermined direction along a top surface on a perpendicularly upper side of the screen and crushes the slag accumulated on the screen; and
a guide rod that is a bar-like member having an axis line along the predetermined direction, is connected to the spreader, and restricts a moving direction of the spreader,
wherein the guide rod has a spreader-side member connected to the spreader and a shaft member connected to the spreader-side member,
wherein the spreader-side member and the shaft member are connected by butt welding in the axis line direction,
wherein the spreader-side member and the shaft member have the same shape of cross sections orthogonal to the axis line direction at a butt welding position,
wherein the spreader-side member has a spreader-side hollow portion formed along the axis line direction,
wherein the shaft member has a shaft-side hollow portion formed along the axis line direction, and
wherein the shaft-side hollow portion is formed only in a part of the shaft member adjacent to the spreader-side member.
 
7. An assembly method of a slag crusher that, by using a spreader reciprocated in a predetermined direction, crushes slag generated by a combustor of a gasifier that gasifies carbonaceous feedstock and solidified in cooling water stored in a slag bath installed perpendicularly below the combustor,
at a guide rod that is a bar-like member having an axis line along the predetermined direction, has a spreader-side member connected to the spreader and a shaft member connected to the spreader-side member, and restricts a moving direction of the spreader,
the spreader-side member having a spreader-side hollow portion formed along the axis line direction,
the shaft member having a shaft-side hollow portion formed along the axis line direction, and
the shaft-side hollow portion being formed only in a part of the shaft member adjacent to the spreader-side member,
the assembly method comprising a step of:
performing butt welding in the axis line direction on the spreader-side member and the shaft member at a portion where the spreader-side member and the shaft member have the same shape of cross sections orthogonal to the axis line direction.