Method for lowering abrasion of boiler heating surface

A technology for heating surfaces and boilers, applied in the direction of coating, etc., can solve problems such as impact, and achieve the effects of high cost, increased safety performance, and improved unit efficiency

Inactive Publication Date: 2017-03-15
SHANGHAI SHANGDIAN CAOJING POWER GENERATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although every time the boiler is shut down for maintenance, the water-cooled wall tubes at the corresponding positions will be inspected and unqualified tubes will be dealt with, but this cannot be solved during the operation of the unit, and it will have a great impact on the economy of the unit

Method used

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  • Method for lowering abrasion of boiler heating surface
  • Method for lowering abrasion of boiler heating surface

Examples

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Embodiment

[0021] The company is a 2*1000MW ultra-supercritical pressure once-through boiler, and the water-cooled wall adopts a spiral surrounding structure. The number of tubes in the spiral coil is 716, the diameter is Φ38.1*7, the material is T23, the material of the inclined furnace bottom is 15CrMo, and the inclination angle is 26.2103°. At an elevation of 69225mm, the spiral coil passes through the middle of the furnace. The header is converted into a vertical pipe circle, and the spiral pipe circle is 1.2 circles calculated from the inflection point of the cold ash hopper to the exit of the spiral pipe circle. Since the beginning of August 2009, the water-cooled wall tubes of units 1 and 2 have exploded 86 times.

[0022] At the connection between the upper part of the 4.5-meter water seal and the water-cooled wall header, an anti-wear cover is installed, and metal spraying is used to prevent wear at the part where the ash and slag of the water-cooled wall tube below 22 meters is...

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Abstract

The invention relates to a method for lowering abrasion of a boiler heating surface. The method comprises the steps that firstly, an abrasion-resisting cover is additionally arranged between a water seal insertion plate and a water wall container and used for reducing production of metal stress caused when a boiler is started or stopped; and secondly, metal spraying is carried out on the surface of a water wall tube and used for abrasion prevention of parts with serious abrasion. Compared with the prior art, the method has the beneficial effects of reducing service suspension and improving the unit efficiency.

Description

technical field [0001] The invention relates to a boiler, in particular to a method for reducing wear on the heating surface of the boiler. Background technique [0002] Since the No. 1 and No. 2 generating units of our company were put into use, there have been problems of wear and tear of the water-cooled wall tubes on the heating surface of the boiler, and most of them have occurred in the cold ash hopper and soot blower area at the bottom of the furnace. Stress, slump, and sootblower blowout. [0003] Although every time the boiler is shut down for maintenance, the water-cooled wall tubes at the corresponding positions will be inspected and unqualified tubes will be dealt with, but this cannot be solved during the operation of the unit, and it will have a great impact on the economy of the unit . Contents of the invention [0004] The object of the present invention is to provide a method for reducing the wear of the heating surface of the boiler in order to overcome...

Claims

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Application Information

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IPC IPC(8): F28F19/06
Inventor 王华祝雷渊
Owner SHANGHAI SHANGDIAN CAOJING POWER GENERATION
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