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Opposed firing boiler

A technology for hedging combustion and boilers, which is applied in the field of boilers, can solve the problems that anti-corrosion coatings increase the operation risk of water-cooled walls and increase the workload of boiler maintenance, and achieve the effects of preventing high-temperature corrosion, increasing oxygen content, and increasing oxygen content.

Inactive Publication Date: 2019-12-27
XIAN ANT PETROLEUM TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, this passive protective measure cannot fundamentally solve the problem of high-temperature corrosion. On the contrary, the peeling off of the anti-corrosion coating increases the risk of water-cooled wall operation and increases the workload of boiler maintenance.

Method used

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] see Figure 1-2 , the present invention proposes a counter-combustion boiler mode on the basis of the counter-combustion mode of the front and rear walls. High temperature corrosion problem of wall water wall. Including the furnace 1 surrounded by the boiler left wall 9 and the furnace right wall 10, the boiler front wall 7 and the boiler rear wall 8; because the boiler left wall 9 and the boiler right wall 10 are prone to high temperature corrosion, therefore, the boiler left The center line of the wall 9 is arranged along the height direction of the furnace 1 with single or double rows of burners 4 on the left side wall, and the center line of the right wall 10 of the boiler is arranged with single or double rows of burners 5 on the right side wall along the height direction of the furnace 1 In this way, it is possible to form a structure in which ...

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Abstract

The invention discloses an opposed firing boiler. The opposed firing boiler comprises a hearth surrounded by a boiler left-side wall, a boiler right-side wall, a boiler front wall and a boiler rear wall. A left-side wall burner is arranged on the center line of the boiler left-side wall in the height direction of the hearth, a right-side burner is arranged on the center line of the boiler right-side wall in the height direction of the hearth, several front wall burners are arranged on the boiler front wall, and several rear wall burners are arranged on the boiler rear wall; and a bellow for providing secondary air and over-fire air for the hearth is arranged at the peripheries of the boiler left-side wall, the boiler right-side wall, the boiler front wall and the boiler rear wall. According to the structure of the opposed firing boiler, on the basis that an original pulverized coal firing mode is not influenced, the problem of high temperature corrosion to side wall water cooling wallsis thoroughly solved.

Description

technical field [0001] The invention belongs to the field of boilers, and in particular relates to a counter-combustion boiler. Background technique [0002] With the large-scale implementation of high-parameter and large-capacity thermal power units, thermal power technology has ushered in new opportunities for development, and at the same time new technical problems have emerged. In order to meet environmental protection emission requirements and reduce the operating pressure of the tail denitrification system, most of the newly commissioned units adopt low-nitrogen combustion technology to control the formation of nitrogen oxides. The low-nitrogen combustion method is to set an overfired air nozzle above the main burner area, and a part of the secondary air is sent into the furnace through the overfired air nozzle. The main burner area is an oxygen-deficient combustion, and the combustion temperature is reduced, thereby suppressing nitrogen oxides. generate. [0003] Fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C5/28F23C7/00
CPCF23C5/28F23C7/00
Inventor 栗汝杰
Owner XIAN ANT PETROLEUM TECH
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