公开(公告)号：US11603989B2

公开(公告)日：2023-03-14

申请号：US16761701

申请日：2018-12-12

Applicant: Valmet Technologies Oy

Inventor： Pekka Lehtonen ,  Tero Heino

IPC: F22B31/00 ,  F23C10/06 ,  F23C10/10 ,  F23C10/20 ,  F23C10/28

Abstract: A circulating fluidized bed boiler, comprising a furnace, a loopseal, and a loopseal heat exchanger arranged in the loopseal. The loopseal heat exchanger comprises at least an inlet chamber, a bypass chamber, and a first heat exchange chamber, heat exchanger pipes arranged in the first heat exchange chamber, and a primary particle outlet for letting out bed material from the first heat exchange chamber. The primary particle outlet has at least a first part and a second part separated from each other by a barrier element in such a way that the first part of the primary particle outlet has a first height and a first width, wherein a ratio of the first height to the first width is less than 0.5 or more than 2. Use of the circulating fluidized bed boiler such that fluidizing gas and bed material are let out from the first heat exchange chamber via the primary particle outlet.

公开(公告)号：US11300288B2

公开(公告)日：2022-04-12

申请号：US16754681

申请日：2018-10-17

Applicant: Valmet Technologies Oy

Inventor： Mikko Varonen ,  Matti Nieminen

IPC: F22G3/00 ,  F01K3/24 ,  F22B31/00 ,  F22G1/16

Abstract: The solution comprises a method of and a system for maintaining steam temperature and therefore electricity production efficiency with decreased loads of a steam turbine power plant comprising a fluidized bed boiler (12) and a fluidized bed superheater (2) adapted to superheat steam supplied to a steam turbine (3). According to the solution, the steam temperature may be maintained by providing, outside a furnace (10), additional heating to the fluidized bed material in its outer circulation, thereby increasing the amount of thermal energy available in the fluidized bed material to be transferred in the fluidized bed superheater (2) to the steam supplied to the steam turbine (3). Such additional heating may be performed by selectably supplying combustible gas with nozzles (111) into and/or burned with a burner in or in the vicinity of the fluidized bed material outside the furnace (10). As an additional aspect of the disclosed solution, the combustible gas may be produced with a gasifier (4).

公开(公告)号：US10954853B2

公开(公告)日：2021-03-23

申请号：US16311295

申请日：2017-10-11

Applicant: Mitsubishi Hitachi Power Systems, Ltd.

Inventor： Fumihiro Chuman ,  Masashi Kitada ,  Makoto Toyomaru

IPC: F02C3/28 ,  F23M5/08 ,  F22B37/20 ,  F02C6/18 ,  C10J3/48 ,  C10J3/52 ,  F01K23/10 ,  F22B1/24 ,  F01K23/06 ,  F22B21/34 ,  F01K23/14 ,  F22B31/00 ,  F22B37/12 ,  F23N3/00 ,  F22B37/10 ,  F22B1/18 ,  C10J3/74

Abstract: The purpose of the present invention is to provide a furnace wall in which a throat section with a smaller channel diameter than other regions can be formed using all peripheral wall tubes. Provided is a furnace wall comprising: a plurality of peripheral wall tubes (142), which are disposed so as to form a cylindrical shape when aligned in one direction and through the interior of which cooling water flows; and fins (140) that connect neighboring peripheral wall tubes (142) in an airtight manner. In a throat section in which the diameter of a horizontal cross-section of the cylindrical shape is reduced in comparison to other regions, the peripheral wall tubes (142) are disposed so as to be in mutual contact and the fins (140) are disposed on the inner circumferential sides of the cylindrical shapes.

公开(公告)号：US20200300454A1

公开(公告)日：2020-09-24

申请号：US16362140

申请日：2019-03-22

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Frederic VITSE ,  Carl D. EDBERG ,  Steven A. UNKER

IPC: F22B31/00 ,  F22B7/20 ,  F22B7/18 ,  F22B31/08

Abstract: A method of operating a furnace having a firing system is disclosed. The method includes providing a solid fuel to a sieve; separating the fuel into a portion and a second portion; providing a first portion of a flue gas to a first fuel dryer comprising a first duct; providing the first portion of fuel to the first duct, and drying the first portion of fuel therein; conveying the first portion of fuel through the first duct to the furnace; burning the first portion of fuel with firing system; conveying the second portion of fuel and a second portion of the flue gas to a second fuel dryer in a lower portion of the furnace, providing the second portion of fuel to a mill; pulverizing the second portion of fuel with the mill; conveying the second portion of fuel to the furnace; and burning the second portion of fuel.

公开(公告)号：US20190331335A1

公开(公告)日：2019-10-31

申请号：US16258479

申请日：2019-01-25

Applicant: Daniel R. Higgins ,  Eugene Sullivan

Inventor： Daniel R. Higgins ,  Eugene Sullivan

IPC: F22B31/00 ,  F22B21/36 ,  F23G5/32 ,  F23G5/30 ,  F23G5/24 ,  F23G5/04 ,  F23J15/02 ,  F22B21/34 ,  F23G5/44 ,  F23G5/46

Abstract: A ground supported power boiler is described combining a refractory lined and insulated conical floor; an insulated cylindrical combustion chamber; a cylindrical furnace with water tube wall; a rectangular convective section; a single vertical steam drum; tangential injection of the fuel and combustion air; means for fluidizing the fuel bed; means for selectively stripping particulates from the flue gases; multi-stage particulate stripping and filtering from flue gases, means for using the walls of steam drum as steam/water droplet separator, means for recirculating and capturing heat from the flue gases; means for pressurizing the interior of the boiler above atmospheric pressure; means for heating and drying fuel prior to feeding the fuel to the boiler; means for creating hydrogen shift reaction; means for eliminating any need for sootblowing; and designed to not require the use of an induced draft fan.

公开(公告)号：US10247049B2

公开(公告)日：2019-04-02

申请号：US15629642

申请日：2017-06-21

Applicant: Bill & Melinda Gates Foundation

Inventor： Peter Janicki

IPC: F01K25/04 ,  F22B31/00 ,  B01D1/04 ,  C02F1/00 ,  F01K17/04 ,  C02F9/00 ,  B01D1/22 ,  F01K17/06 ,  F23K1/04 ,  F23G5/04 ,  F23G5/30 ,  F23G5/40 ,  C02F1/04 ,  C02F11/12 ,  C02F1/20 ,  C02F1/28 ,  C02F1/44 ,  C02F11/06

Abstract: At least one aspect of the technology provides a self-contained processing facility configured to convert organic, high water-content waste, such as fecal sludge and garbage, into electricity while also generating and collecting potable water.

公开(公告)号：US20170356642A1

公开(公告)日：2017-12-14

申请号：US15618913

申请日：2017-06-09

Applicant: The Babcock & Wilcox Company

Inventor： Mikhail Maryamchik ,  Scott B. Anderson ,  Aaron Gavlak ,  David L. Kraft ,  John M. Sanders ,  Michael J. Szmania

IPC: F22B31/00 ,  F23C10/12 ,  F23C10/20 ,  F23C10/22

CPC classification number: F22B31/0023 ,  F22B31/0061 ,  F22B31/0069 ,  F22B31/0092 ,  F23C10/12 ,  F23C10/20 ,  F23C10/22 ,  F23C2206/102

Abstract: A circulating fluidized bed (CFB) boiler has one or more bubbling fluidized bed enclosures containing heating surfaces and located within a lower portion of the CFB boiler to provide an in-bed heat exchanger (IBHX). Solids in the bubbling fluidized bed are maintained in a slow bubbling fluidized bed state by separately controlled fluidization gas supplies. The beds feature open bottom distribution grids with hoppers disposed below to collect solids. The enclosure defining the IBHX is supported from structures below the grids and the enclosure can be supported from the hoppers.

公开(公告)号：US09772104B2

公开(公告)日：2017-09-26

申请号：US14412270

申请日：2013-12-24

Applicant: INSTITUTE OF ENGINEERING THERMOPHYSICS, CHINESE ACADEMY OF SCIENCES

Inventor： Qinggang Lv ,  Ming Gao ,  Guoliang Song ,  Xiaofang Wang ,  Yunkai Sun ,  Dongyu Wang ,  Tuo Zhou

IPC: F22B31/00 ,  F23C10/10 ,  F23C10/18 ,  F23C10/20

CPC classification number: F23C10/10 ,  F22B31/003 ,  F22B31/0061 ,  F22B31/0084 ,  F23C10/18 ,  F23C10/20

Abstract: The present invention provides a circulating fluidized bed boiler, comprising: furnace side walls; a ceiling; an air distribution plate provided at a bottom of a furnace; and at least one air distribution cone provided on the air distribution plate, wherein each air distribution cone extends upwards from the air distribution plate into an interior of the furnace and has a shape gradually tapered in an extending direction, cone side walls which form the air distribution cone are provided with secondary air ports, the cone side walls are separated from the furnace side walls, and a furnace combustion space is formed and surrounded by the ceiling, the furnace side walls, the air distribution plate, and the cone side walls. The present invention further relates to an air distributor for a circulating fluidized bed boiler, the air distributor being provided on an air distribution plate of the boiler, wherein the air distributor is in a form of an air distribution cone, which extends upwards from the air distribution plate into an interior of a furnace to form a shape gradually tapered in an extending direction, and secondary air ports are formed in air distribution cone side walls forming the air distribution cone. The present invention also relates to an air distributor assembly for a circulating fluidized bed boiler.

公开(公告)号：US09518730B2

公开(公告)日：2016-12-13

申请号：US13983008

申请日：2012-01-19

Applicant: Qinggang Lu ,  Ming Gao ,  Yunkai Sun ,  Guoliang Song ,  Xiaofang Wang ,  Yongjie Na ,  Dongyu Wang ,  Haigang Wang

Inventor： Qinggang Lu ,  Ming Gao ,  Yunkai Sun ,  Guoliang Song ,  Xiaofang Wang ,  Yongjie Na ,  Dongyu Wang ,  Haigang Wang

IPC: F22B31/00 ,  F23C10/10 ,  F23J15/02 ,  F23C10/18

CPC classification number: F22B31/0084 ,  F23C10/10 ,  F23C10/18 ,  F23J15/027 ,  F23J2217/40

Abstract: A large-size circulating fluidized bed boiler, comprising: a furnace having a vertical furnace center line; and at least two groups of cyclones, each cyclone of each group of cyclones having an inlet gas pass communicated with the furnace. A furnace cross section formed by outer sidewalls and located at the inlet gas pass of the cyclone is a polygon having 2×n sides, and n is a positive integer greater than 1. The polygon is axially symmetric with respect to a perpendicular bisector of each side of the polygon, and when n is 2, the polygon is a square. Triangles formed by two endpoints of an inlet of the inlet gas pass of each cyclone at the cross section and an intersection of the furnace center line and the cross section are congruent. A single flow field in communication with each of the inlet is formed in the cross section.

Abstract translation: 一种大型循环流化床锅炉，包括：具有垂直炉中心线的炉; 和至少两组旋风分离器，每组旋风分离器的每个旋风分离器具有与炉连通的入口气体通道。 由外侧壁形成并位于旋风分离器的入口气体通道处的炉横截面是具有2×n侧的多边形，n是大于1的正整数。多边形相对于每个的垂直平分线轴对称 多边形的边，当n为2时，多边形为正方形。 每个旋风分离器的入口气体通道的两个端点在横截面上形成的三角形和炉中心线与横截面的交点是一致的。 在横截面中形成与每个入口连通的单个流场。

公开(公告)号：US20160356488A1

公开(公告)日：2016-12-08

申请号：US15038641

申请日：2014-08-15

Applicant: DOOSAN LENTJES GMBH

Inventor： Damian Goral ,  Klaus-Dieter Pohl ,  Oguzhan Narin

IPC: F23C10/04 ,  F22B31/00 ,  F28D7/00 ,  F28F9/02 ,  F28D13/00 ,  F28D7/08

CPC classification number: F23C10/04 ,  F01K5/02 ,  F22B31/0092 ,  F23C10/00 ,  F23C2206/103 ,  F28D7/0041 ,  F28D7/082 ,  F28D13/00 ,  F28F9/026 ,  F28F9/0268 ,  F28F9/22 ,  F28F2009/226

Abstract: A fluidized bed heat exchanger with a chamber (24) comprises a solid particles inlet port (22), a solid particles outlet port (30), arranged at a distance to the inlet port (22), means (46) for introducing a fluidizing gas from a bottom area into the chamber (24). The heat exchanger has furthermore several heat exchange tubes (28) being arranged at a distance to each other. The heat exchange tubes (28) are each arranged in a meandering fashion and a wall-like pattern and extend substantially parallel to the main flow direction of the solid particles on their way to and through the outlet port (30).

Abstract translation: 具有室（24）的流化床热交换器包括固体颗粒入口（22），与入口端（22）一定距离设置的固体颗粒出口（30），用于引入流化床 气体从底部区域进入腔室（24）。 热交换器还有几个热交换管（28）彼此间隔一定距离设置。 热交换管（28）各自以曲折的方式和壁状图案布置，并且在它们通过和通过出口（30）的途中基本上平行于固体颗粒的主流动方向延伸。