CN212673251U

CN212673251U - Device for blowing soot by using flue gas for low-temperature economizer

Info

Publication number: CN212673251U
Application number: CN202020329055.8U
Authority: CN
Inventors: 王伟; 刘惠勇; 赵江翔; 张吉祥
Original assignee: Beijing Londian Hongtai Environmental Technology Co ltd
Current assignee: Beijing Londian Hongtai Environmental Technology Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2021-03-09
Anticipated expiration: 2030-03-17

Abstract

The utility model relates to a device that is used for low temperature economizer to utilize flue gas to blow grey mainly comprises low temperature economizer (or low temperature economizer), low temperature economizer import flue, low temperature economizer export flue, electrostatic precipitator export flue, soot blowing flue, soot blower import damper, soot blower export damper, cloth tuber pipe and fluidization plate. The utility model relates to a low temperature electric precipitation of boiler of thermal power plant and flue gas waste heat recovery field are applicable to the application field of arranging low temperature economizer, low temperature economizer in the horizontal flue under the high ash environment. The utility model discloses running cost is low, overhaul and operation maintenance are convenient.

Description

Device for blowing soot by using flue gas for low-temperature economizer

Technical Field

The utility model relates to a low temperature electric precipitation of boiler of thermal power plant and flue gas waste heat recovery field are applicable to the application field of arranging low temperature economizer, low temperature economizer in the horizontal flue under the high ash environment.

Background

The low-low temperature electric dust removal technology is a novel dust removal technology which is applied more at present in China, and can reduce specific resistance and improve the dust removal efficiency of the electrostatic dust remover under certain conditions. The low-temperature economizer usually adopts water medium type heat exchange, arranges a metal heat exchange tube in a flue in front of the electrostatic dust collector, utilizes water and flue gas to carry out indirect heat exchange, reduces the temperature of the flue gas, and reduces the specific resistance of dust, thereby improving the dust removal efficiency of the electrostatic dust collector, and the heated water can return to boiler feed water or heat supply network water for waste heat recovery.

Because the low-temperature economizer is usually arranged in a horizontal flue of the electrostatic dust collector, an ash deposition site inevitably occurs, the conventional low-temperature economizer usually adopts a sound wave soot blower or a fixed rotary steam soot blower, but the two modes have certain effects on removing the ash deposition on a tube bundle of the low-temperature economizer, but the ash deposition at the bottom of the low-temperature economizer cannot be effectively removed.

The utility model discloses plan to develop a device to low temperature economizer bottom deposition carries out the deashing.

Disclosure of Invention

In order to effectively remove the dust accumulated at the bottom of the low-temperature economizer. The technical scheme of the utility model realizes with following mode:

a device and a method for blowing dust by using flue gas for a low-temperature economizer are characterized by comprising the low-temperature economizer (or the low-temperature economizer), a low-temperature economizer inlet flue, a low-temperature economizer outlet flue, an electrostatic dust collector outlet flue, a dust blowing fan inlet baffle door, a dust blowing fan outlet baffle door, an air distribution pipe and a fluidization plate.

When the low-temperature economizer is put into operation, the cleaned flue gas after dust removal is extracted from the flue at the outlet of the electrostatic dust collector, the cleaned flue gas is pressurized by the fan and then is connected with the air distribution pipe of the shell at the bottom of the low-temperature economizer, air is introduced into the fluidization plate, and the ash at the bottom is fluidized and then taken away by the flue gas.

The flue at the outlet of the low-temperature economizer is connected with the electrostatic dust collector; the outlet flue of the electrostatic dust collector is arranged at the outlet of the electrostatic dust collector; the soot blowing flue is connected with the bottom shell of the low-temperature economizer and the outlet flue of the electrostatic dust collector; the soot blowing fan inlet baffle door, the soot blowing fan, the fan outlet baffle door, the air distribution pipe and the fluidization plate are sequentially arranged on the soot blowing flue; the fluidization plate is of a hemispherical structure and is uniformly arranged at the bottom of the low-temperature economizer shell; the air distribution pipe is horizontally connected to the fluidization plate.

The heat exchange tube of the low-temperature economizer (low-temperature economizer) adopts a light tube, a spiral fin, an H-shaped fin or a double-H-shaped fin type, and the heat exchange tube is made of 20 steel, ND steel, stainless steel tubes and the like.

The following provides a further description of the present invention with reference to the drawings and the detailed description.

Drawings

Fig. 1 is a schematic view of the process flow of the present invention.

In the figure: 1. the device comprises a low-temperature economizer, 2, 3, 4, an electrostatic dust collector, 5, an outlet flue of the electrostatic dust collector, 6, a soot blowing flue, 7, a soot blowing fan, 8, an inlet baffle door of the soot blowing fan, 9, an outlet baffle door of the soot blowing fan, 10, an air distribution pipe and 11, and a fluidization plate.

Detailed Description

Referring to fig. 1, a device for blowing soot by using flue gas of a low-temperature economizer is characterized by comprising the low-temperature economizer (or the low-temperature economizer) (1), a low-temperature economizer inlet flue (2), a low-temperature economizer outlet flue (3), an electrostatic dust collector (4), an electrostatic dust collector outlet flue (5), a soot blowing flue (6), a soot blowing fan (7), a soot blowing fan inlet baffle door (8), a soot blowing fan outlet baffle door (9), an air distribution pipe (10) and a fluidization plate (11).

The outlet flue (3) of the low-low temperature economizer is connected with an electrostatic dust collector (4); the outlet flue (5) of the electrostatic dust collector is arranged at the outlet of the electrostatic dust collector (4); the soot blowing flue (6) is connected with a shell at the bottom of the low-temperature economizer (1) and an outlet flue (5) of the electrostatic dust collector; the inlet baffle door (8) of the soot blower, the soot blower (7), the outlet baffle door (9) of the blower, the air distribution pipe (10) and the fluidization plate (11) are sequentially arranged on the soot blowing flue (6); the fluidization plate (11) is of an arc-shaped structure and is uniformly arranged at the bottom of the shell of the low-temperature economizer (1); the air distribution pipe (10) is horizontally connected to the fluidization plate (11).

In the system shown in fig. 1, when the electrostatic dust collector (4) normally operates, no matter whether the low-temperature coal economizer (1) is in a commissioning state or not, the dedusted flue gas in the outlet flue (5) of the electrostatic dust collector enters the soot blowing flue (6), the flue gas is pressurized by the soot blowing fan (7), the flue gas is uniformly blown into the fluidization plate (11) through the air distribution pipe (10), the fluidization plate (11) avoids the bottom support of the low-temperature coal economizer (1), the fluidization plate is uniformly arranged on the bottom shell of the low-temperature coal economizer (1), and the bottom accumulated ash is fluidized by the air blown into the fluidization plate (11), so that the fluidization plate has better flowability, the main flue gas is convenient to carry, and the purpose of reducing the bottom accumulated ash of the low-temperature coal economizer (1) is achieved.

The utility model discloses running cost is low, overhaul and operation maintenance are convenient.

The above description is only for the specific embodiments of the present invention, the technical features of the present invention are not limited thereto, and any changes or modifications made by those skilled in the art in the field of the present invention should be included in the claims of the present invention.

Claims

1. The utility model provides a device that is used for low temperature economizer to utilize flue gas to blow grey, by low temperature economizer, low temperature economizer import flue, low temperature economizer export flue, electrostatic precipitator export flue, soot blowing flue, soot blower import baffle door, soot blower export baffle door, cloth tuber pipe and fluidization plate constitute, its characterized in that: the heat exchange tube of the low-temperature economizer adopts a light tube, a spiral fin, an H-shaped fin or a double-H-shaped fin type, the heat exchange tube is made of 20 steel, ND steel or stainless steel tubes, the medium of the low-temperature economizer is water, the medium of the shell pass is flue gas, and the low-temperature economizer comprises a low-temperature economizer and a low-pressure economizer according to different purposes.

2. The device for blowing soot by using flue gas for the low-temperature economizer as claimed in claim 1, wherein: the outlet flue of the low-temperature economizer is connected with an electrostatic dust collector; the outlet flue of the electrostatic dust collector is arranged at the outlet of the electrostatic dust collector; the soot blowing flue is connected with the bottom shell of the low-temperature economizer and the outlet flue of the electrostatic dust collector; the soot blowing fan inlet baffle door, the soot blowing fan, the fan outlet baffle door, the air distribution pipe and the fluidization plate are sequentially arranged on the soot blowing flue.

3. The device for blowing soot by using flue gas for the low-temperature economizer as claimed in claim 1, wherein: the fluidization plate is of an arc-shaped structure and is uniformly arranged at the bottom of the low-temperature economizer shell; the air distribution pipe is horizontally connected to the fluidization plate, so that dust accumulation in the air distribution pipe can be prevented, and the pipeline is prevented from being blocked.