CN111822455A - Device for preventing dust accumulation of dust accumulation points of flue and flue - Google Patents
Device for preventing dust accumulation of dust accumulation points of flue and flue Download PDFInfo
- Publication number
- CN111822455A CN111822455A CN202010878654.XA CN202010878654A CN111822455A CN 111822455 A CN111822455 A CN 111822455A CN 202010878654 A CN202010878654 A CN 202010878654A CN 111822455 A CN111822455 A CN 111822455A
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- Prior art keywords
- flue
- short pipes
- strip
- preventing
- dust
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/035—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing by suction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2209/00—Details of machines or methods for cleaning hollow articles
- B08B2209/02—Details of apparatuses or methods for cleaning pipes or tubes
- B08B2209/027—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces
- B08B2209/032—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces by the mechanical action of a moving fluid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Incineration Of Waste (AREA)
Abstract
The invention discloses a device for preventing a flue from easily accumulating dust and accumulating dust, and the flue, which belong to the field of combustion equipment, can solve the problems of easy dust accumulation and hardening in the flue and blocked chimney in the prior art, and easily control the floating direction of dust, and comprises an air source and a plurality of rows of short pipes inserted into a flue wallboard, wherein two adjacent rows of short pipes are arranged in a staggered manner, the top ends of the short pipes are sealed, and the side surfaces of the short pipes are provided with strip-shaped openings along the flue gas direction, so that compressed air can be quickly sprayed out; the air source is communicated with the bottoms of the short pipes, and when the air source blows air, the air pressure near the strip-shaped openings at the tops of the short pipes is reduced.
Description
Technical Field
The invention belongs to the field of combustion equipment, and particularly relates to a device for preventing an ash accumulation point of a flue from accumulating ash and the flue.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The inventor finds that, based on the requirements of the process or limited by factors such as the field, the part of the flue is inevitably provided with positions easy to deposit dust, such as the rear side of a sharp corner, the lowest point of the flue, the rear part penetrating through a flue upright post and the like, the positions are easy to deposit dust, and in addition, due to adverse factors such as high moisture content in the flue gas or frequent start and stop of the machine, the dust deposition phenomenon is accumulated continuously, the deposited dust is difficult to take away by simply depending on the carrying capacity of the flue gas, the dust is continuously absorbed to form hardening, the hardening is continuously thickened, the flow field distribution is further influenced, the abnormal vibration of the flue is caused, the flue load is increased rapidly, and the normal production is influenced or even.
For example, in the prior published technical literature, a horizontal flue soot-blowing system is disclosed, which comprises a soot-blowing device and a ventilation pipe, wherein the soot-blowing device is laid on the side wall of the horizontal flue accumulated material at the inlet of the circulating fluidized bed desulfurizing tower, and the soot-blowing device is provided with soot-blowing holes for blowing the circulating accumulated material. One end of the vent pipe is connected with the soot blowing device, the other end of the vent pipe is connected with a blower of the circulating fluidized boiler, and air generated by the blower is blown out from the soot blowing holes through the vent pipe so as to sweep materials accumulated in a horizontal flue of the circulating fluidized boiler. The inventor believes that this direct soot blowing through the air holes requires consideration of the gas pressure, which makes it difficult to control the floating direction of the dust during soot blowing.
The sound wave soot blowing method has the defects that the natural frequency difference of soot particles is large, the sound range emitted by a soot blower is small, the sound range is not suitable for the soot deposition characteristic, the soot deposition can not generate coking on a common hearth and a convection heating surface, and an air preheater at a low temperature section and serious soot blockage can not be removed. The gas pulse soot blowing method is limited by allowable metal stress, so that the method cannot be applied to a region with the smoke temperature higher than 700 ℃. The device is mainly used for cleaning the surface ash on the inner wall of the furnace, a coal economizer, a catalyst and the like, is not generally used for cleaning the ash in a flue, and has high cost.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device for preventing a flue from easily accumulating dust and accumulating dust at a dust accumulation point and the flue.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the technical scheme of the invention provides a device for preventing dust from being easily accumulated in a flue, which comprises an air source and a plurality of rows of short pipes inserted into a wall plate of the flue, wherein two adjacent rows of short pipes are arranged in a staggered manner, the top ends of the short pipes are sealed, and strip-shaped openings are formed in the side surfaces of the short pipes along the direction of flue gas, so that compressed air can be quickly sprayed out; the air source is communicated with the bottoms of the short pipes, and when the air source blows air, the air pressure near the strip-shaped openings at the tops of the short pipes is reduced.
In a second aspect, the invention also provides a flue, which includes the device for preventing the flue from easily depositing ash points and depositing ash as described in the first aspect.
The technical scheme of the invention has the following beneficial effects:
1) according to the invention, after the gas is blown out from the outside through the short pipe and the strip-shaped opening arranged on the short pipe, the cross section surface of the gas passage is actively and rapidly reduced, so that the gas flow rate is increased, under the condition that the gas flow rate blown out from the strip-shaped opening is greater than the flue gas flow rate in the flue, the Bernoulli principle can be utilized to enable the dust to move from the high-pressure area to the low-pressure area, so that the dust floats, and meanwhile, due to the influence of the Bernoulli principle, the floating direction of the dust is fixed in the direction of the low-pressure.
2) According to the invention, the strip-shaped opening is arranged on the side surface of the short pipe instead of the top end of the short pipe, and when air is blown, the area of a low-pressure area formed by the strip-shaped opening arranged on the side surface of the short pipe can cover more areas, so that on one hand, the arrangement of fewer short pipes can be realized, and on the other hand, the situation that the cleaning is not complete due to direct soot blowing can be reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Figure 1 is a schematic side cross-sectional view of a flue according to one or more embodiments of the present invention,
figure 2 is a cross-sectional schematic view of the present invention taken along line a-a of figure 1 according to one or more embodiments,
FIG. 3 is a schematic view of a spool of the present invention according to one or more embodiments.
In the figure: 11. the device comprises a first row of short pipes, 12, a second row of short pipes, 13, a third row of short pipes, 14, a fourth row of short pipes, 15, a main pipe, 21, an arc pipe section, 22, a vertical pipe section, 23, a transverse pipe section, 3, a valve, 4, a strip-shaped opening, 5, a sealing welding line, 20 and a flue wallboard.
The spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Term interpretation section: the terms "mounted," "connected," "fixed," and the like in the present invention are to be understood in a broad sense, and for example, the terms "mounted," "connected," and "fixed" may be fixed, detachable, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As introduced by the background art, aiming at the defects of the prior art, the invention aims to provide a device for preventing the dust from being accumulated in the flue easily, which can solve the problem that the flue pipe is easy to accumulate the dust, harden and block in the flue in the prior art.
Example 1
In a typical embodiment of the present invention, as shown in fig. 1 to 3, in the present embodiment, a device for preventing a flue from easily depositing dust and accumulating dust is disclosed, which includes an air source and a plurality of rows of short pipes inserted into a flue wall plate 20, two adjacent rows of short pipes are arranged in a staggered manner, the top ends of the short pipes are sealed, and the side surfaces of the short pipes are provided with strip-shaped openings 4 along the flue gas direction, so that compressed air can be rapidly ejected; the air source is communicated with the bottoms of the short pipes, and when the air source blows air, the strip-shaped opening 4 at the top of the short pipe can blow air into the flue.
More specifically, in this embodiment, the short pipe is cylindrical and tubular. In this embodiment, a specific scenario is implemented by a curved pipe segment, the pipe segment includes a circular arc pipe segment 21, and therefore dust is easily accumulated on the circular arc pipe segment 21.
In this embodiment, four rows of short pipes are provided, and the distances among the four rows of short pipes are respectively 800mm, 1600mm and 500mm, in this embodiment, the four rows of short pipes are respectively named as a first row of short pipes 11, a second row of short pipes 12, a third row of short pipes 13 and a fourth row of short pipes 14, so that the distance between the first row of short pipes 11 and the second row of short pipes 12 is 800mm, the distance between the second row of short pipes 12 and the third row of short pipes 13 is 1600mm, and the distance between the third row of short pipes 13 and the fourth row of short pipes 14 is 500 mm. The distance between the short pipes in each row is equal and is 550 mm.
Because the pipe sections in this embodiment are in the shape of round corners, it can be regarded as a ninety-degree arc pipeline with a radian, the first end of the arc pipeline is communicated with the vertical pipe section 22, and the second end of the arc pipeline is communicated with the horizontal pipeline, in this embodiment, the installation position of the first row of short pipes 11 is the first position in the arc pipe section 21, and the installation position of the fourth row of short pipes 14 is the outer end of the horizontal pipe section 23, and because the tangent of the circular pipe and the pipe wall or pipe wall in this embodiment is kept perpendicular, the first row of short pipes 11 and the fourth row of short pipes are in an intersecting geometric relationship.
Accordingly, the second row of short tubes 12 is mounted at a second location within the arcuate tube section 21 and the third row of short tubes is mounted at the inner end of the transverse tube section 23.
The central angle between the first position and the second position on the circular arc tube section 21 is 10 °, and the central angle between the second position and the lower end of the circular arc tube section 21 is 10 °.
The pitch in the present embodiment refers to a pitch between horizontal projections of the installation positions of the short pipes.
As for the strip-shaped opening 4 in the present embodiment, it may be a strip-shaped opening 4 provided in the short pipe by a cutting method or a strip-shaped opening 4 provided in the short pipe by a casting method.
In this embodiment, according to local conditions, the short pipes are arranged on the arc pipe section 21 and the transverse pipe section 23 which are easy to accumulate dust through the first short pipe to the fourth short pipe so as to blow up the dust accumulated in the pipeline, so that the accumulated dust attached to the wall plate is blown open and scattered, the dust is blown up, and the dust is taken away by the flow of the flue gas in the flue to enter the subsequent process for treatment.
The air source is communicated with the main pipe 15, the main pipe 15 is communicated with the short pipes, and the strip-shaped opening 4 is arranged in parallel with the cross sections of the short pipes. In this embodiment, using a blower as the gas source, the diameter of the main pipe 15 needs to be larger than the diameter of the short pipes in order to ensure that each short pipe can obtain sufficient gas to blow up dust in the pipe.
More specifically, each stub is in vertical communication with the main pipe 15.
In this embodiment, the width of the strip-shaped opening 4 is smaller than the thickness of the flue wall panel 20. The strip-shaped opening 4 formed at the upper part of each short pipe is consistent in height relative to the flue wall plate 20. The length of the strip-shaped opening 4 is less than half of the circumference of the short pipe.
More specifically, in the present embodiment, the shape of the bar-shaped opening 4 projected on the vertical plane is a rectangle, and the width thereof can be defined as the side length of the shorter side thereof, and the length thereof can be defined as the side length of the longer side thereof. The width of the strip-shaped opening 4 is required to be as small as possible, and in the embodiment, the width of the strip-shaped opening 4 is only defined numerically by comparing with the thickness of the flue wall plate 20, and the area of the strip-shaped opening 4 is kept smaller than the cross-sectional area of the short pipe.
In this embodiment, the strip-shaped opening 4 is opened at the top of the short pipe, and the short pipe is specifically located on the lateral wall of the short pipe from the top to one seventh of the bottom. The principle of blowing up dust in this embodiment is the bernoulli principle, that is, in the water flow or the air flow, if the speed is low, the pressure is high, and if the speed is high, the pressure is low; in this embodiment, the cross-sectional area of the strip-shaped opening 4 is suddenly reduced relative to the cross-sectional area of the short pipe for the gas blown out from the strip-shaped opening 4, and the gas flow rate is increased under the condition that the total gas amount is not changed, so that a low-pressure area is formed in the area outside the strip-shaped opening 4 to attract the gas flow of the high-pressure area, and the gas flow of the high-pressure area drives the dust to leave the inner wall of the pipeline.
It can be understood that, in the present embodiment, the strip-shaped opening 4 is used as the air outlet, the strip-shaped opening 4 can be regarded as a strip-shaped hole, after the air flow is blown out from the strip-shaped opening 4, a low-pressure area is formed at the outer side of the strip-shaped opening 4 due to the air flow jetted out from the strip-shaped opening 4, where the pressure is lower than the original pressure in the pipeline, dust will float from the high-pressure area to the low-pressure area, float, and be further disturbed by the air flow blown out from the strip-shaped opening 4, and suspend in the pipeline for a period of time.
In the embodiment, the bernoulli principle is fully utilized, and in order to fully utilize the bernoulli principle, the strip-shaped opening 4 is arranged on the side surface of the short pipe instead of the top end of the short pipe in the embodiment, and when air is blown out from the strip-shaped opening 4 arranged on the side surface of the short pipe, the area of a formed low-pressure area can cover more areas, so that on one hand, fewer short pipes can be arranged, and on the other hand, the situation that the direct soot blowing is not thorough in cleaning can be reduced.
In this embodiment, still include valve 3, camera and controller, the controller is connected with camera and pressure valve respectively, and the controller detects the deposition when the camera, the operating condition of control pressure valve.
More specifically, be equipped with the observation hole on the flue wall in this embodiment, the condition in the direct shooting observation hole of camera can be judged by the manual work or whether there is a large amount of dusts in the picture that the machine judgement camera was shot.
In another embodiment, the observation hole can be used for judgment manually, or routine operation can be carried out when the inspection is timed.
That is, the present embodiment can be automatically started, and in a normal flue, the time is in a working state, that is, there is an airflow from the flue to the outside at all times; after the gas source in this embodiment is activated, the cleaning operation can be completed.
It can be understood that in the present embodiment, the flow speed of the gas blown out from the strip-shaped opening 4 is larger than the flow speed of the flue gas in the flue.
It will also be appreciated that in this embodiment the stub pipe is passed through the flue wall panel 20 and that the seal weld between the stub pipe and the flue wall panel is a seal weld 5 for forming a seal weld located on the outside of the flue wall panel 20.
Example 2
In an exemplary embodiment of the present invention, as shown in fig. 1, the present invention discloses a flue comprising the device for preventing the easy deposition of soot in the flue according to example 1.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A device for preventing the easy dust deposition of a flue from depositing dust is characterized by comprising an air source and a plurality of rows of short pipes inserted into a wall plate of the flue, wherein two adjacent rows of short pipes are arranged in a staggered manner, the top ends of the short pipes are sealed, and strip-shaped openings are formed in the side surfaces of the short pipes along the flue gas direction, so that compressed air can be rapidly sprayed out; the air source is communicated with the bottoms of the short pipes, and when the air source blows air, the air pressure near the strip-shaped openings at the tops of the short pipes is reduced.
2. The device for preventing the dust from being easily accumulated in the dust accumulation point of the flue as claimed in claim 1, wherein the air source is communicated with a main pipe, the main pipe is communicated with the plurality of short pipes, and the strip-shaped opening is formed in parallel with the cross section of the short pipe.
3. The apparatus for preventing soot deposition in a flue from being prone to soot deposition as claimed in claim 2, wherein each of said short pipes is vertically communicated with said main pipe.
4. The device for preventing soot deposition in a flue from being prone to soot deposition as claimed in claim 1, wherein the width of the strip-shaped opening is smaller than the thickness of the flue wall plate.
5. The device for preventing the ash from being easily accumulated in the flue according to the claim 1, wherein the air source is a blower.
6. The device for preventing the ash from being easily accumulated in the flue from being accumulated in the flue according to claim 1, wherein the strip-shaped opening formed at the upper part of each short pipe is consistent in height relative to the flue wall plate.
7. The device for preventing ash accumulation on a flue from being prone to ash accumulation points as claimed in claim 1 or 6, wherein the length of the strip-shaped opening is less than half of the circumference of the short pipe.
8. The device for preventing the dust from being easily accumulated in the dust accumulation points of the flue as claimed in claim 1, further comprising a valve, a camera and a controller, wherein the controller is respectively connected with the camera and the pressure valve, and the controller controls the working state of the pressure valve when the camera detects the dust accumulation.
9. The apparatus for preventing soot deposition in a flue from being prone to soot deposition as claimed in claim 1, wherein the plurality of short tubes in each row are equally spaced.
10. A flue comprising an apparatus for preventing soot deposition in a flue duct according to claim 1 or 2 or 3 or 4 or 5 or 6 or 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010878654.XA CN111822455A (en) | 2020-08-27 | 2020-08-27 | Device for preventing dust accumulation of dust accumulation points of flue and flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010878654.XA CN111822455A (en) | 2020-08-27 | 2020-08-27 | Device for preventing dust accumulation of dust accumulation points of flue and flue |
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| Publication Number | Publication Date |
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| CN111822455A true CN111822455A (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010878654.XA Pending CN111822455A (en) | 2020-08-27 | 2020-08-27 | Device for preventing dust accumulation of dust accumulation points of flue and flue |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115245931A (en) * | 2021-09-22 | 2022-10-28 | 上海奔达钢结构有限公司 | Pipeline convenient to clean and used for dust removal |
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| JP2013011372A (en) * | 2011-06-28 | 2013-01-17 | Ihi Corp | Method for operating combustion ash deposition preventing apparatus and combustion ash deposition preventing apparatus |
| CN103307617A (en) * | 2013-06-05 | 2013-09-18 | 西安热工研究院有限公司 | Pneumatic dust cleaning device of boiler |
| CN105299667A (en) * | 2015-10-22 | 2016-02-03 | 南京信息工程大学 | Soot blowing device used for circular flue of coal-fired power plant |
| CN206786748U (en) * | 2017-04-10 | 2017-12-22 | 武汉燃控科技热能工程有限公司 | The soot blower of tube-type air preheater |
| CN108036341A (en) * | 2017-12-22 | 2018-05-15 | 上海华电电力发展有限公司 | A kind of boiler flue soot blower system and ash-blowing method |
| CN209263063U (en) * | 2018-10-16 | 2019-08-16 | 华电电力科学研究院有限公司 | A kind of novel soot blower system for station boiler horizontal flue |
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2020
- 2020-08-27 CN CN202010878654.XA patent/CN111822455A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000227212A (en) * | 1999-02-04 | 2000-08-15 | Babcock Hitachi Kk | Flue structure for furnace and its operation method |
| CN201724236U (en) * | 2010-07-03 | 2011-01-26 | 湖南理昂再生能源电力有限公司 | One-way loosening hood for biomass flue boiler |
| JP2013011372A (en) * | 2011-06-28 | 2013-01-17 | Ihi Corp | Method for operating combustion ash deposition preventing apparatus and combustion ash deposition preventing apparatus |
| CN103307617A (en) * | 2013-06-05 | 2013-09-18 | 西安热工研究院有限公司 | Pneumatic dust cleaning device of boiler |
| CN105299667A (en) * | 2015-10-22 | 2016-02-03 | 南京信息工程大学 | Soot blowing device used for circular flue of coal-fired power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115245931A (en) * | 2021-09-22 | 2022-10-28 | 上海奔达钢结构有限公司 | Pipeline convenient to clean and used for dust removal |
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Application publication date: 20201027 |
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