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Screen type heated surface arrangement method for fluid bed boiler furnace

A panel-type heating surface and fluidized bed boiler technology, which is applied to steam boilers, boiler water pipes, water-tube steam boilers, etc., can solve problems such as uneven heat absorption of water-cooled walls, flow deviation, and impact on supercritical hydrodynamic safety. , to achieve the effect of increasing the layout space and easy layout

Inactive Publication Date: 2008-01-16
SHANGHAI BOILER WORKS
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Problems solved by technology

[0006] The above layouts of the heating surfaces in the furnace are widely used in small and medium-sized CFB boilers, and when they are arranged close to the water wall, the temperature field of the water wall near the screen will be uneven. The uneven heat absorption of the water wall causes a large flow deviation, which affects the safety of supercritical hydrodynamics

Method used

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  • Screen type heated surface arrangement method for fluid bed boiler furnace
  • Screen type heated surface arrangement method for fluid bed boiler furnace
  • Screen type heated surface arrangement method for fluid bed boiler furnace

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Embodiment

[0021] As shown in Figure 4, it is a schematic diagram of the panel heating surface structure of a fluidized bed boiler furnace, and the described panel heating surface structure of a fluidized bed boiler furnace is composed of a boiler 1, a separator 3 and a panel heating surface 6 At least one separator 3 is installed on both sides of the boiler 1, and the panel heating surface 6 is vertically installed in the middle of the boiler 1, the upper end passes through the furnace roof and connects to the outlet header 7, and the lower end passes through the water-cooled wall of the side wall of the boiler 1 and the inlet header 9 The connection, in order to prevent wear and tear, is composed of pipes on the panel heating surface 6, pins 8 and wear-resistant castables 10 in the oblique horizontal section through the wall and vertical flue flow direction, and the upper part is composed of tubes on the panel heating surface 6 and flat steel Membrane type composition. The panel-type h...

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Abstract

The invention relates to a layout method for screen heating surface of furnace tank of a fluidized bed boiler, which comprises a boiler and at least a separator respectively provided at two sides of the boiler. The invention is characterized in that the screen heating surface is vertically disposed in the middle of the boiler, the upper end of the screen heating surface passes out of the top of the boiler and connected with an outlet header, and the lower end of the screen heating surface passes out from the water cooling wall at the side wall of boiler through pin and abrasion-proof casting material and connected with an inlet header. The invention is easy to be laid out, and is not influenced by volume, parameters and the number of separators.

Description

technical field [0001] The invention relates to a method for arranging the heating surface of the furnace of a fluidized bed boiler, which is used for the arrangement of the heating surface in the furnace of a circulating fluidized bed boiler, such as: an evaporation screen, an overheating screen and a reheating screen, belonging to the fluidization of a circulating fluidized bed boiler technology field. Background technique [0002] There are usually a large number of heating surfaces in the furnace of circulating fluidized bed boilers. The arrangement of these heating surfaces depends on the type of coal and the parameters of the boiler. Water cooling screens, superheating screens and reheating screens need to be arranged in the furnace. According to the special combustion mode of the circulating fluidized bed boiler, there is a high-concentration material circulation in the furnace, so the arrangement of these heating surfaces in the furnace is very different from that of...

Claims

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Application Information

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IPC IPC(8): F22B21/00F22B37/10
Inventor 肖峰
Owner SHANGHAI BOILER WORKS
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