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A boiler opposing combustion structure

A technology for hedging combustion and boilers, which is applied in the direction of using a variety of fuel combustion, combustion types, combustion equipment, etc., can solve problems such as increasing boiler maintenance workload, increasing the risk of water wall operation by anti-corrosion coating, and preventing high-temperature corrosion. , The effect of increasing oxygen content and protecting operation safety

Active Publication Date: 2017-01-25
XIAN THERMAL POWER RES INST CO LTD
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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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  • A boiler opposing combustion structure
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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 boiler hedging combustion structure based on the hedging combustion mode of the front and rear walls. The problem of high temperature corrosion of the water wall of the side 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 ...

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Abstract

A boiler hedging combustion structure, including a furnace surrounded by the left wall of the boiler, the right wall of the boiler, the front wall of the boiler and the rear wall of the boiler; the left wall burner is arranged along the height direction of the furnace on the center line of the left wall of the boiler, The center line of the right side wall of the boiler is arranged along the furnace height direction with right wall burners, several rows of front wall burners are arranged on the boiler front wall, and several rows of rear wall burners are arranged on the boiler rear wall; the left side wall of the boiler, The right side wall of the boiler, the front wall of the boiler and the rear wall of the boiler are equipped with air boxes that provide secondary air and overfired air for the furnace. This structure completely solves the problem of high-temperature corrosion of the side wall water wall without affecting the original pulverized coal combustion method.

Description

technical field [0001] The invention belongs to the field of boilers, and in particular relates to a boiler opposed combustion structure. 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. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C5/28
Inventor 党黎军杨辉张宇博
Owner XIAN THERMAL POWER RES INST CO LTD
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