Unlock instant, AI-driven research and patent intelligence for your innovation.

Oscillating wind device for preventing high-temperature corrosion of heating surface of boiler

A high-temperature corrosion and heating surface technology, applied in the components of steam boilers, steam boilers, boiler water pipes, etc., can solve the problems of inability to form a swing state, limited coverage, etc., to eliminate uneven distribution of air films, and simple device installation. Reliable, low number of installations

Pending Publication Date: 2022-06-07
ZHEJIANG ZHENENG TECHN RES INST +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the airflow of the wall-mounted wind device of this patent is in the form of direct current, which cannot form a swing state, and the coverage is very limited.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Oscillating wind device for preventing high-temperature corrosion of heating surface of boiler
  • Oscillating wind device for preventing high-temperature corrosion of heating surface of boiler
  • Oscillating wind device for preventing high-temperature corrosion of heating surface of boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like figure 1 As shown, the oscillating air device unit includes: a secondary air main pipe 1, an air duct 2, a regulating damper 3, an air volume measuring device 4, an oscillating air bellows 5 and an oscillating air nozzle 6;

[0031] The air duct 2 includes the front end of the air duct 2 and the rear end of the air duct 2; the secondary air main pipe 1 is connected with the front end of the air duct 2; the front end of the air duct 2 is connected with the rear end of the air duct 2 through the regulating damper 3; There is an air volume measuring device 4; the rear end of the air duct 2 is connected to the oscillating air bellows 5;

[0032] like figure 2 As shown, the oscillating air nozzle 6 has a symmetrical structure up and down; the oscillating air nozzle 6 is composed of a front inlet 6-1, a middle pipe 6-2, a return pipe 6-3, and an end outlet 6-4; the return pipe 6-3 is located in the middle pipe On both sides of 6-2, the return pipe 6-3 and the intermed...

Embodiment 2

[0039] The use method of the oscillating air device to prevent the high temperature corrosion of the heating surface of the boiler, including:

[0040]Step 1. Install the oscillating air device on the boiler.

[0041] In step 1, the oscillating air device is installed in the oxygen-deficient area of ​​the water wall 10 of the boiler.

[0042] Step 2. Turn on the blower to generate secondary air.

[0043] Step 3. The secondary air flows through the air duct 2 through the secondary air main pipe 1 and enters the oscillating air bellows 5 .

[0044] Step 4. The secondary air in the oscillating air box 5 is discharged to the heating surface of the boiler in the form of regular oscillation through the oscillating air nozzle 6, and an air film is formed on the heating surface of the boiler to avoid high temperature corrosion of the water wall.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an oscillating air device for preventing high-temperature corrosion of a heating surface of a boiler, which comprises at least one oscillating air device unit (8), and each oscillating air device unit (8) comprises a secondary air mother pipe (1), an air duct (2), an adjusting air door (3), an air volume measuring device (4), an oscillating air bellow (5) and an oscillating air nozzle (6). The oscillating air nozzle has the beneficial effects that the oscillating air nozzle is of a special structure, secondary air enters the front-end inlet of the oscillating air nozzle through the air duct and the air bellow and flows in the middle pipeline in a wall-attached mode to form the coanda effect, part of jet flow returns to the inlet through the backflow pipeline to enable main jet flow to deflect, the coanda effect is generated on the other side, and the secondary air is sprayed out. Periodic oscillation of jet flow is caused in cycles, the jet flow is discharged from a nozzle at a tail end outlet in a regular swing oscillation mode, the working coverage area is much larger than that of a traditional close-to-wall air device, and the close-to-wall air device can be suitable for most types of boilers.

Description

technical field [0001] The invention relates to the technical field of combustion boilers, more specifically, to an oscillating air device for preventing high temperature corrosion of the heating surface of the boiler. Background technique [0002] In recent years, with the continuous improvement of environmental protection requirements for coal-fired units, in order to reduce NO X Large-scale power station boilers mostly use furnace staged air supply and low-oxygen combustion to reduce NO emissions. X However, such a method will result in the production of a large amount of reducing gas due to insufficient oxygen in the main combustion zone. For the hedging boiler, it will also cause the airflow to scour the side wall, thus forming a strong reducing atmosphere near the side wall, resulting in high temperature corrosion. Severe high temperature corrosion will lead to rapid thinning of the water wall, causing leakage or tube bursting, affecting the safe operation of the boi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F23L9/00F22B37/10F23J15/06F23N3/00
CPCF23L9/00F22B37/108F23N3/007F23J15/06Y02E20/34
Inventor 陈勤根牛志刚项群扬陈英国王准康春宇张海丹
Owner ZHEJIANG ZHENENG TECHN RES INST