公开(公告)号：US09989318B2

公开(公告)日：2018-06-05

申请号：US15028700

申请日：2014-09-29

Applicant: VALMET TECHNOLOGIES OY

Inventor： Vesa Kainu

IPC: F28F1/12 ,  F22B37/06 ,  F22B31/00

CPC classification number: F28F1/12 ,  F22B31/0007 ,  F22B31/0015 ,  F22B37/06

Abstract: A heat exchanger pipe in a flow duct for gases. The pipe first section has a second section with an inner pipe for transferring heat transfer medium; an outer pipe that radially encloses a part of the inner pipe; and a medium layer between the outer pipe and the part of the inner pipe. The second section of the heat exchanger pipe bends less than 90 degrees. Furthermore, the first section is insulated in its entirety, or non-insulated in the vicinity of other heat recovery surfaces only. In the device the temperature of the heat transfer medium flowing in the inner pipe is at least 500° C., the temperature of the outer surface of the outer pipe is higher than 600° C., or an auxiliary agent is fed to the thermal device.

公开(公告)号：US09976739B2

公开(公告)日：2018-05-22

申请号：US14442378

申请日：2013-11-07

Applicant: Valmet Technologies Oy

Inventor： Vesa Kainu ,  Jukka-Pekka Leppälä

IPC: F23C10/20 ,  F23L1/02 ,  F23L9/06 ,  F23H3/02 ,  F23C10/24

CPC classification number: F23C10/20 ,  F23C10/24 ,  F23C2900/10007 ,  F23H3/02 ,  F23L1/02 ,  F23L9/06

Abstract: An air nozzle arrangement for a fluidized bed boiler, comprising an air feed pipe and an air nozzle which limit an air feed duct configured to supply air to the furnace of the fluidized bed boiler. The air nozzle arrangement comprises a surface configured to guide coarse material along said surface. At least part of said surface is thermally insulated from the air nozzle and/or the air feed pipe. Furthermore, at least part of said surface is configured to protect at least part of said air nozzle and/or air feed pipe. Thus, the temperature of said surface is configured to be high when the fluidized bed boiler is in operation, whereby the solidification of molten material of the fluidized bed in the air nozzle arrangement is reduced.

公开(公告)号：US20160258692A1

公开(公告)日：2016-09-08

申请号：US15028700

申请日：2014-09-29

Applicant: VALMET TECHNOLOGIES OY

Inventor： Vesa Kainu

IPC: F28F1/12

CPC classification number: F28F1/12 ,  F22B31/0007 ,  F22B31/0015 ,  F22B37/06

Abstract: A heat exchanger pipe in a flow duct for gases. The pipe first section has a second section with an inner pipe for transferring heat transfer medium; an outer pipe that radially encloses a part of the inner pipe; and a medium layer between the outer pipe and the part of the inner pipe. The second section of the heat exchanger pipe bends less than 90 degrees. Furthermore, the first section is insulated in its entirety, or non-insulated in the vicinity of other heat recovery surfaces only. In the device the temperature of the heat transfer medium flowing in the inner pipe is at least 500° C., the temperature of the outer surface of the outer pipe is higher than 600° C., or an auxiliary agent is fed to the thermal device.

Abstract translation: 用于气体的流动管道中的热交换器管道。 管道第一部分具有第二部分，其具有用于传递传热介质的内部管道; 径向包围内管的一部分的外管; 以及外管与内管的一部分之间的介质层。 热交换器管道的第二部分弯曲小于90度。 此外，第一部分整体绝缘，或仅在其它热回收表面附近不绝缘。 在该装置中，在内管中流动的传热介质的温度至少为500℃，外管的外表面的温度高于600℃，或者将辅助剂供给到热 设备。