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W-type boiler jet flow optimization system

A boiler and jet flow technology, which is applied in the field of W-type boiler jet flow optimization system, can solve the problems such as the inability to adjust the inclination angle of the secondary air under the arch, and achieve the effects of improving the adaptability of coal types, enhancing the fullness of the flame, and extending the flame stroke

Inactive Publication Date: 2020-02-07
中国大唐集团科学技术研究总院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the object of the present invention is to provide a device with the secondary air under the arch that can swing at an inclination angle. The problem of entering the furnace, W-type boiler jet flow optimization system that improves the burnout rate of pulverized coal

Method used

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  • W-type boiler jet flow optimization system
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  • W-type boiler jet flow optimization system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Such as Figures 3 to 9 As shown, the W-type boiler jet flow optimization system in this embodiment has a device that can swing the inclination angle of the secondary air under the arch, which can solve the problem that the inclination angle of the secondary air under the arch cannot be adjusted after the coal quality changes, and the inclination of the guide vanes cannot be adjusted. Angle into the furnace, it is difficult to improve the problem of pulverized coal burnout rate. Including pull rod, adjusting arm, adjusting vane, mediastinum.

[0063] A secondary air chamber is arranged on the front and rear walls of the lower furnace, which are divided into an upper arch secondary air chamber and an arch lower secondary air chamber through a partition. In the secondary air chamber under the arch, separate secondary air chambers are formed by longitudinal partitions according to the position and quantity of the burners, and there are twelve independent air chambers on t...

Embodiment 2

[0069] The W-type boiler jet flow optimization system in this embodiment, on the basis of Embodiment 1, also includes SOFA nozzles on the arch, four on the front and rear walls, three and three of which are opposed, and one on the right side of the front wall and one on the left side of the rear wall. The arrangement of the nozzles.

[0070] Due to the relatively serious over-temperature phenomenon in the boiler reheater, the method of shutting down the burner in the over-temperature area is used to solve the over-temperature problem of the reheater in normal operation.

[0071] It is believed that the energy in the middle position of the boiler is relatively concentrated, and this symptom can be alleviated by adjusting the downtilt angle of the F wind and the air distribution of the F wind.

[0072] F wind downtilt angle and D, E wind opening degrees adopt the formulation method described in the table below. This operation mode has a better effect on reducing the reheater wal...

Embodiment 3

[0079] In this embodiment, the W-type boiler jet flow optimization system is based on Embodiment 1, in order to improve the coking situation in the lower furnace of the boiler. Four ventilation slots are opened longitudinally in the wing wall to blow the secondary air inward. The outer diameter of the water-cooled wall tube at the wing wall is 120.65mm, the center distance is 146.4mm, the gap between the tubes is 25.4mm, and the outer diameter of the upper and lower tubes on the wing wall is 69.85mm. The reducing tube connects both ends, and the thick tube at the four ventilation belts is replaced with a thin tube, the pipe gap is 76.55mm, and the height of the ventilation belt is set to the total length of the wing wall pipe, or set on the half of the wing wall .

[0080] Four ventilation slots are opened longitudinally in the wing wall to blow the secondary air inward. The outer diameter of the water-cooled wall tube at the wing wall is larger (120.65mm), the center distance...

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Abstract

The invention relates to a W-shaped boiler jet flow optimization system. An under-arch secondary wind inclination angle swinging device comprises eight adjusting blades installed on rotating shafts. The middle of each adjusting blade is connected with each rotating shaft via a bolt; the rotating shafts at the same height and in the same independent air chamber pass through a first, a second, a third and a fourth longitudinal separation plates to connect adjusting blades in each air chamber; with the rotating shafts disposed in the air chamber, eight rotating shafts are disposed in each air chamber along a hearth height direction; an adjusting arm is fixedly connected to each rotating shaft; and each adjusting arm is connected with a connection rod via a hinge chain, so the eight rotating shafts can be connected. A rotating arm is arranged on one rotating shaft and a pull rod is connected to the rotating arm; the pull rod is connected with the rotating arm via a hinge chain; a hinged part between the rotating arm and the pull rod is provided with a slide chute; and a pin hole is formed in a connection part between the end part of the pull rod and the rotating arm. Under-arch secondary wind inclination angle can be adjusted according to different coal quality.

Description

technical field [0001] The invention relates to a jet flow optimization system for a W-type boiler. Background technique [0002] Such as figure 1 As shown, the main technical feature of the W flame boiler is the double-cyclone separated burner combined with the double-inlet and double-outlet positive pressure direct-blown pulverizing system. [0003] The double cyclone separation burner is vertically arranged on the arch, and it is mainly composed of pulverized coal input pipe, grid separator, double cyclone tube, light pulverized coal flow pipe, derotation blade and other components. The primary pulverized coal airflow passes through the pulverized coal input pipe, is evenly divided into two parts by the grid separator, and enters two cyclones. In each cyclone, due to the effect of inertial separation, two streams of pulverized coal flow, thick and thin, are formed, which enter the furnace vertically downward through the nozzle of the cyclone and the outlet of the light ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23L9/00F23N3/00F23C7/00F23M5/08F23C5/08
CPCF23C5/08F23C7/00F23C2201/30F23L9/00F23M5/08F23N3/007F23N2237/02F23N2239/02
Inventor 张新
Owner 中国大唐集团科学技术研究总院有限公司