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A method for adjusting the secondary air of a w-flame once-through boiler

An adjustment method and technology of once-through boilers, which are applied in the combustion method, adjustment of air supply, control of combustion, etc., can solve the problems of insufficient combustion of pulverized coal, incomplete combustion of solids, and reduced unit economy, and achieve good actual inspection results. The effect of improving pulverized coal combustion efficiency and good economic benefits

Active Publication Date: 2019-04-02
ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Poor air distribution of the boiler, lack of oxygen in the middle of the furnace for combustion, insufficient oxygen supply and pulverized coal cannot be fully burned, resulting in low combustion efficiency of the boiler, increased heat loss from incomplete combustion of solids, and reduced unit economy

Method used

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  • A method for adjusting the secondary air of a w-flame once-through boiler
  • A method for adjusting the secondary air of a w-flame once-through boiler

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Embodiment

[0013] Example: such as figure 1 As shown, burners are installed on the front and rear arches of the furnace 1, the burners include a row of front and rear arches, each row is provided with twelve burners, and the front row of burners are D3, E3, F3, D4, E4, F4, A3, B3, C3, A4, B4, C4, rear burners from left to right are C1, B1, A1, C2, B2, A2, F1, E1, D1, F2, E2, D4, The two rows of burners are placed correspondingly from left to right.

[0014] The boiler furnace width direction is adjusted according to the following adjustment methods for the secondary air distribution:

[0015] a. Increase the secondary air of the burners in the areas on both sides of the furnace, and the number of burners in the areas on both sides of the furnace is four, namely C1, C4, D2, and D3;

[0016] b. The secondary air opening of the front arch of the furnace is 5%~10% larger than that of the rear arch;

[0017] c. The opening of the secondary air is arranged in a triangle, the central area...

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Abstract

The invention discloses a secondary air regulation method for a W-flame monotube boiler. The regulation method is characterized in that burner secondary air ventilation doors in two lateral areas of a hearth are opened wider; the secondary air ventilation doors are opened in such a manner that the front arch of the hearth is 5-10% higher than the rear arch of the hearth; and the opening degrees of the secondary air ventilation doors are set in a triangular form, wherein the opening degree of the secondary air ventilation door in the central area of the hearth is highest, and the opening degrees of the secondary air ventilation doors of the two lateral areas are sequentially decreased. According to the secondary air regulation method and structure for a W-flame monotube boiler, the problems of anoxic burning in the central area of the boiler hearth, uniform air supplementing from the front and rear arches and slagging in the two lateral areas are improved; and the burning efficiency of coal powder and the safe, stable and economic operation of the set are further enhanced.

Description

technical field [0001] The invention relates to a method for adjusting secondary air of a W flame once-through boiler, belonging to the field of once-through boiler combustion adjustment. Background technique [0002] Foster Wheeler W-flame boilers are the main W-flame once-through boilers currently in operation. The main problems of this boiler during high-load operation are low oxygen content in the middle of the furnace and slagging on both sides of the furnace. Poor air distribution of the boiler, lack of oxygen in the middle of the furnace for combustion, insufficient oxygen supply and pulverized coal cannot be fully burned, resulting in low combustion efficiency of the boiler, increased heat loss from incomplete combustion of solids, and reduced unit economy. Due to the lack of supplementary air on both sides of the furnace, there is a reducing atmosphere, and the ash melting point drops to induce slagging. Contents of the invention [0003] The technical problem to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C7/00F23N3/06
CPCF23C7/00F23N3/06F23N2237/16
Inventor 刘大猛石践赵志军罗小鹏石航
Owner ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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