CN107140447A - Dust-arrest device during ash is put in a kind of power plant's slagging - Google Patents

Dust-arrest device during ash is put in a kind of power plant's slagging Download PDF

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Publication number
CN107140447A
CN107140447A CN201710525857.9A CN201710525857A CN107140447A CN 107140447 A CN107140447 A CN 107140447A CN 201710525857 A CN201710525857 A CN 201710525857A CN 107140447 A CN107140447 A CN 107140447A
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CN
China
Prior art keywords
dust suppression
mrow
dust
power plant
slag
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201710525857.9A
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Chinese (zh)
Other versions
CN107140447B (en
Inventor
张洪义
林森
席庆宇
姜伟
马凤明
徐学军
金英爱
张源博
李明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jilin University
Original Assignee
Huaneng Baishan Gangue Power Generation Co Ltd
Jilin University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huaneng Baishan Gangue Power Generation Co Ltd, Jilin University filed Critical Huaneng Baishan Gangue Power Generation Co Ltd
Priority to CN201710525857.9A priority Critical patent/CN107140447B/en
Publication of CN107140447A publication Critical patent/CN107140447A/en
Application granted granted Critical
Publication of CN107140447B publication Critical patent/CN107140447B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G65/00Loading or unloading
    • B65G65/30Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
    • B65G65/34Emptying devices
    • B65G65/40Devices for emptying otherwise than from the top
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06Spray cleaning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G69/00Auxiliary measures taken, or devices used, in connection with loading or unloading
    • B65G69/18Preventing escape of dust
    • B65G69/185Preventing escape of dust by means of non-sealed systems
    • B65G69/188Preventing escape of dust by means of non-sealed systems with spraying means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2247/00Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/08Means for controlling the separation process
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nozzles (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses a kind of power plant's slagging or dust-arrest device during ash is put, including:The soft screen of dust suppression, it is circumferentially arranged on below slag tap, and with the center arranged concentric of slag tap;Dust suppression external screen, it is slidably arranged on the outside of the soft screen of the dust suppression, on the outside of slag car;Dust suppression injection apparatus, it is arranged between the soft screen of the dust suppression and the dust suppression external screen, and droplet can be sprayed, for settling dust, the present invention has designed and developed a kind of power plant's slagging or has put dust-arrest device during ash, coordinates dust suppression injection apparatus using double-deck dust suppression screen, using water wisely, and it is easy to cleaning, the calculation formula of the spray angle of atomizer is given, more preferable anti-dust effect and water-saving result is resulted in.

Description

Dust suppression device in slag or ash discharging process of power plant
Technical Field
The invention relates to the technical field of dust removal, in particular to a dust suppression device in a slag or ash discharging process of a power plant.
Background
The slag discharging process of the slag bin designed in part of power plants is discharging after water is added and stirred, the dust suppression effect is poor, and a large amount of dust overflows in the square dust process to cause the dirtiness of the surrounding environment and equipment. The existing dust suppression modes comprise dust removal by a dust collection fan and water mist dust suppression, and the dust suppression mode by a suction fan has the disadvantages of large power consumption, high cost, large air disturbance and poor effect; the traditional water mist dust suppression mode has large water consumption, water mist is scattered on the ground and then is formed into plaster, the plaster is not easy to clean, and in addition, the system is easy to freeze in winter, so that unsmooth operation is caused. A novel dust suppression device is developed and arranged for the purpose.
Disclosure of Invention
The invention designs and develops a dust suppression device in the slag or ash discharging process of a power plant, adopts a double-layer dust suppression screen to be matched with a dust suppression spraying device, saves water and is easy to clean.
It is still another object of the present invention to provide a formula for calculating the spray angle of the atomizing nozzle, which can achieve better dust suppression effect and water saving effect.
The technical scheme provided by the invention is as follows:
a dust suppression device in the slag or ash discharging process of a power plant comprises:
the dust suppression soft screen is circumferentially arranged below the slag tap and is concentrically arranged with the center of the slag tap;
the dust suppression outer screen is slidably arranged on the outer side of the dust suppression soft screen and the outer side of the slag receiving vehicle;
and the dust suppression spraying device is arranged between the dust suppression soft screen and the dust suppression outer screen, and can spray fog drops for settling dust.
Preferably, the method further comprises the following steps:
the steel frame is arranged at the position of the slag tap, a slideway is arranged at the bottom of the steel frame, and the dust suppression outer screen is connected with the slideway through a hanging ring in a sliding manner.
Preferably, the dust suppression soft screen and the dust suppression outer screen are made of aluminum silicate felt.
Preferably, the dust suppressing injection apparatus includes:
the annular distribution pipe is a circular pipe and is communicated with a water injection device, a water pump is arranged in the water injection device to pump water into the annular distribution pipe, and a plurality of water outlets are uniformly formed in the bottom of the annular distribution pipe;
and the atomizing nozzle is arranged at the water outlet.
Preferably, the spray direction of the atomizing nozzle is from 95 ° to 110 ° downward.
Preferably, the water injection device further comprises a filter device detachably disposed between the annular distribution pipe and the water injection device.
Preferably, the annular distribution pipe is externally surrounded by an electric heat tracing device.
Preferably, the annular distribution pipe and the electric tracing device are wrapped with heat insulation materials.
Preferably, the heat insulation material is a rubber and plastic heat insulation material.
A control method of a dust suppression device in the slag or ash discharging process of a power plant is disclosed, wherein the spray angle of an atomizing nozzle is as follows:
wherein ,D2For dust suppression outer screen spacing, D is the diameter of the dust suppression spray device, D1The diameter of the dust suppression inner screen; l is the length of the dust suppression outer screen,
wherein ,q is the volume of the dust suppression spraying device, n is the number of the atomizing nozzles, and r is a constant.
The invention has the advantages of
The dust suppression device for the slag or ash discharging process of the power plant provided by the invention has the advantages that the two layers of dust suppression soft screens are used for preventing the slag and the dust from overflowing out of the slag receiving vehicle when the slag bin of the power plant discharges slag or ash. The water mist formed by the dust suppression spraying system takes dust as a core, is absorbed and precipitated and then is discharged into the slag receiving vehicle, the slag receiving vehicle only has a small amount of slag dust on the ground after being driven away, the cleaning is easy, the spraying system uses industrial water of a power plant, the water consumption is small, and the environment is protected. The whole system is convenient to install, low in price and remarkable in dust suppression effect.
Drawings
FIG. 1 is a front view of a dust suppression device in a slag or ash discharge process of a power plant according to the present invention.
FIG. 2 is a top view of a dust suppression device in a slag or ash discharge process of a power plant according to the present invention.
FIG. 3 is a top cross-sectional view of the annular distribution pipe and its insulation system of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
As shown in FIG. 1, the present invention provides a dust suppression device for slag or ash discharge in a power plant, comprising: the device comprises a steel frame 110, a slag bin 120, a slag tap 130, a slag receiving vehicle 140, an atomizing nozzle 150, an inner layer dust suppression soft screen 160, an outer layer dust suppression soft screen 170, a pull ring 180, a self-made steel frame 190, an annular distribution pipe 210, a heat tracing device 220 and a heat insulation material 230.
Wherein, the lower part of the slag bin 120 is provided with a slag bin slag tap 130, the lower part of the slag bin slag tap 130 is provided with an inner layer dust suppression soft screen 160, the outer layer dust suppression soft screen 170 is arranged outside the slag receiving vehicle 140, a dust suppression spraying device is arranged between the inner layer dust suppression soft screen 160 and the outer layer dust suppression soft screen 170, the sprayed water mist is condensed and settled to be discharged to a hopper of the slag receiving vehicle 140, the outer layer dust suppression soft screen 170 thoroughly prevents the raised dust outside the slag receiving vehicle 140, the dust suppression spraying device sprays water mist to fall into the slag receiving hopper completely, the ground has no or only a very small amount of plaster, and the cleaning is easy.
In this embodiment, the inner dust suppression soft screen 160 is located below the slag tap 130, is fixed to a planar steel frame where the slag tap 130 is located, and is concentric with the slag tap 130, and the diameter of the inner dust suppression soft screen 160 is larger than that of the slag tap 130. The inner dust suppression soft screen 160 has an inner cavity which shortens the dust raising distance between the slag tap 130 and the slag receiving vehicle 140, and the larger diameter can reduce the water consumption of the dust suppression injection device.
Preferably, the slag tap 130 is made from a steel frame 190 with a contour slightly larger than the rectangle of the slag car 140, and serves as a track for a plurality of circular pull rings, and the outer dust suppression soft screen 170 is connected to the plurality of circular pull rings 180. The outer dust suppression soft screen 170 is divided into two parts, and can be pulled to two sides before and after slag receiving, so that the space is saved, and the whole structure is easy to arrange.
Preferably, the inner dust suppression soft screen 160 and the outer dust suppression soft screen 170 are made of aluminum silicate felt, and the aluminum silicate felt is water-resistant, high-temperature-resistant, low in price and capable of being detached and replaced at any time.
In this embodiment, the dust suppression spraying device includes an annular distribution pipe 210 and a plurality of atomizing nozzles 150, the power plant pumps the industrial water to the annular distribution pipe 210 through a water pump, a plurality of water outlets are formed below the annular distribution pipe 210 and are provided with the atomizing nozzles 150, the spraying range is from 95 degrees to 110 degrees downwards, and all the sprayed water contacts dust particles and enters the hopper of the slag receiving vehicle 140 after being settled. The inlet channel before annular distribution pipe 210 is provided with and to dismantle filter equipment, and the used water of spraying is the industrial water, filters and avoids industrial impurity to get into the pipeline, guarantees atomizing nozzle 150 unblock, and as a preferred, filter equipment has the steel pipe for the outer layer, and the inlayer has the device of multilayer filter screen structure, and can dismantle the setting between annular distribution pipe and inlet channel through the bolt.
The annular distribution pipe 210 is surrounded by the electric heat tracing device 220, the annular distribution pipe 210 and the electric heat tracing device 210 are wrapped by the heat insulation material 230, the heat insulation material 230 is made of rubber and plastic heat insulation materials, the materials are soft, water-resistant, cold-resistant, good in heat insulation performance and environment-friendly, the water in the annular distribution pipe 210 is not frozen when the temperature is low in winter, and the environmental adaptability of the system is improved.
Preferably, the electric tracing device 220 is a resistance wire wound around the outside of the annular distribution pipe 210, and the resistance wire generates heat after being electrified so as to prevent the water in the annular distribution pipe 210 from freezing.
In another embodiment, the method also comprises a method for controlling the dust suppression device in the slag or ash discharging process of the power plant, and the spray angle of the atomizing nozzle is calculated by the formula:
wherein ,D2For dust suppression outer screen spacing, D is the diameter of the dust suppression spray device, D1The diameter of the dust suppression inner screen; l is the length of the dust suppression outer screen,
wherein ,q is the volume of the dust suppression spray device, n is the number of atomizing nozzles, and r is a constant, and the value of the r is 0.965.
The dust suppression device for the slag or ash discharging process of the power plant provided by the invention has the advantages that the two layers of dust suppression soft screens are used for preventing the slag and the dust from overflowing out of the slag receiving vehicle when the slag bin of the power plant discharges slag or ash. The water mist formed by the dust suppression spraying system takes dust as a core, is absorbed and precipitated and then is discharged into the slag receiving vehicle, the slag receiving vehicle only has a small amount of slag dust on the ground after being driven away, the cleaning is easy, the spraying system uses industrial water of a power plant, the water consumption is small, and the environment is protected. The whole system is convenient to install, low in price and remarkable in dust suppression effect.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims (10)

1. A dust suppression device in the slag or ash discharging process of a power plant is characterized by comprising:
the dust suppression soft screen is circumferentially arranged below the slag tap and is concentrically arranged with the center of the slag tap;
the dust suppression outer screen is slidably arranged on the outer side of the dust suppression soft screen and the outer side of the slag receiving vehicle;
and the dust suppression spraying device is arranged between the dust suppression soft screen and the dust suppression outer screen, and can spray fog drops for settling dust.
2. A power plant slagging or ash discharge process dust suppression apparatus according to claim 1, further comprising:
the steel frame is arranged at the position of the slag tap, a slideway is arranged at the bottom of the steel frame, and the dust suppression outer screen is connected with the slideway through a hanging ring in a sliding manner.
3. A dust suppression device in a slag or dust discharging process of a power plant as claimed in claim 2, wherein said dust suppression soft screen and said dust suppression outer screen are both made of aluminum silicate felt.
4. A dust suppression device in a power plant slagging or ash discharge process according to claim 1, characterized in that the dust suppression injection device comprises:
the annular distribution pipe is a circular pipe and is communicated with a water injection device, a water pump is arranged in the water injection device to pump water into the annular distribution pipe, and a plurality of water outlets are uniformly formed in the bottom of the annular distribution pipe;
and the atomizing nozzle is arranged at the water outlet.
5. A power plant slagging or ash discharge process dust suppression apparatus according to claim 4, wherein the spray direction of the atomizing nozzles is from 95 ° to 110 ° downwards.
6. A power plant slagging or ash discharge process dust suppression apparatus according to claim 4 or 5, further comprising a filter unit removably arranged between the annular distribution pipe and the water injection means.
7. A power plant slagging or ash laying process dust suppression apparatus according to claim 6, wherein the annular distribution pipe is externally surrounded by an electric heat tracing.
8. A power plant slagging or ash discharge process dust suppression device according to claim 7, wherein the annular distribution pipe and the electric heat tracing apparatus are wrapped with thermal insulation material.
9. A power plant slagging or ash discharge process dust suppression device according to claim 8, wherein the thermal insulation material is a rubber plastic thermal insulation material.
10. A control method of a dust suppression device in a slag or ash discharging process of a power plant is characterized in that the spraying angle of an atomizing nozzle is as follows:
<mrow> <mi>&amp;alpha;</mi> <mo>=</mo> <mrow> <mo>{</mo> <mrow> <mfrac> <mi>&amp;pi;</mi> <mn>2</mn> </mfrac> <mo>+</mo> <mrow> <mo>&amp;lsqb;</mo> <mrow> <mrow> <mo>&amp;lsqb;</mo> <mrow> <mi>arctan</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <msub> <mi>D</mi> <mn>2</mn> </msub> <mo>-</mo> <mi>D</mi> </mrow> <mrow> <mn>2</mn> <mi>L</mi> </mrow> </mfrac> <mo>)</mo> </mrow> <mo>+</mo> <mi>arctan</mi> <mrow> <mo>(</mo> <mfrac> <mrow> <msub> <mi>D</mi> <mn>1</mn> </msub> <mo>-</mo> <mi>D</mi> </mrow> <mrow> <mn>2</mn> <mi>L</mi> </mrow> </mfrac> <mo>)</mo> </mrow> </mrow> <mo>&amp;rsqb;</mo> </mrow> <mo>/</mo> <mn>2</mn> </mrow> <mo>&amp;rsqb;</mo> </mrow> </mrow> <mo>}</mo> </mrow> <mi>l</mi> <mi>n</mi> <mo>&amp;lsqb;</mo> <msub> <mi>REL</mi> <mi>w</mi> </msub> <mo>&amp;CenterDot;</mo> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <mrow> <mn>1</mn> <mo>-</mo> <msup> <mi>r</mi> <mn>2</mn> </msup> </mrow> </mfrac> <mo>)</mo> </mrow> <mo>&amp;rsqb;</mo> </mrow>
D2for dust suppression outer screen spacing, D is the diameter of the dust suppression spray device, D1The diameter of the dust suppression inner screen; l is the length of the dust suppression outer screen;
wherein ,q is the volume of the dust suppression spraying device, n is the number of the atomizing nozzles, and r is a constant.
CN201710525857.9A 2017-06-30 2017-06-30 Dust suppression device in power plant slag discharge or ash discharge process Active CN107140447B (en)

Priority Applications (1)

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CN201710525857.9A CN107140447B (en) 2017-06-30 2017-06-30 Dust suppression device in power plant slag discharge or ash discharge process

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Application Number Priority Date Filing Date Title
CN201710525857.9A CN107140447B (en) 2017-06-30 2017-06-30 Dust suppression device in power plant slag discharge or ash discharge process

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CN107140447A true CN107140447A (en) 2017-09-08
CN107140447B CN107140447B (en) 2023-05-16

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108584477A (en) * 2018-05-13 2018-09-28 韩文晓 A kind of building waste vehicle automatic water jetting frame
CN108861681A (en) * 2018-07-26 2018-11-23 王维振 Dust guard for powdered goods discharging

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005205311A (en) * 2004-01-22 2005-08-04 Centralsun:Kk Cleaning duct for cleaning exhaust gas from kitchen and apparatus for cleaning exhaust gas from kitchen
CN103915307A (en) * 2012-12-31 2014-07-09 中微半导体设备(上海)有限公司 Plasma process chamber and gas injection apparatus for same
CN203877553U (en) * 2014-01-17 2014-10-15 北京精诚博桑科技有限公司 Dust suppression apparatus for ship unloader
CN205495224U (en) * 2016-04-14 2016-08-24 云南蓝澈科技有限公司 Dry fog dust suppression device
CN106115309A (en) * 2016-08-15 2016-11-16 江苏绿叶机械有限公司 A kind of bag-pack cement loading machine dust arrester installation
CN205802535U (en) * 2016-06-27 2016-12-14 象山向荣机械制造有限公司 A kind of unpowered dust-arrest device
CN206939940U (en) * 2017-06-30 2018-01-30 华能白山煤矸石发电有限公司 Dust-arrest device during ash is put in a kind of power plant's slagging

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005205311A (en) * 2004-01-22 2005-08-04 Centralsun:Kk Cleaning duct for cleaning exhaust gas from kitchen and apparatus for cleaning exhaust gas from kitchen
CN103915307A (en) * 2012-12-31 2014-07-09 中微半导体设备(上海)有限公司 Plasma process chamber and gas injection apparatus for same
CN203877553U (en) * 2014-01-17 2014-10-15 北京精诚博桑科技有限公司 Dust suppression apparatus for ship unloader
CN205495224U (en) * 2016-04-14 2016-08-24 云南蓝澈科技有限公司 Dry fog dust suppression device
CN205802535U (en) * 2016-06-27 2016-12-14 象山向荣机械制造有限公司 A kind of unpowered dust-arrest device
CN106115309A (en) * 2016-08-15 2016-11-16 江苏绿叶机械有限公司 A kind of bag-pack cement loading machine dust arrester installation
CN206939940U (en) * 2017-06-30 2018-01-30 华能白山煤矸石发电有限公司 Dust-arrest device during ash is put in a kind of power plant's slagging

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108584477A (en) * 2018-05-13 2018-09-28 韩文晓 A kind of building waste vehicle automatic water jetting frame
CN108861681A (en) * 2018-07-26 2018-11-23 王维振 Dust guard for powdered goods discharging

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Inventor after: Jin Yingai

Inventor after: Zhang Yuanbo

Inventor after: Li Ming

Inventor before: Zhang Hongyi

Inventor before: Lin Sen

Inventor before: Xi Qingyu

Inventor before: Jiang Wei

Inventor before: Ma Fengming

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Address after: 130000 No. 2699 Qianjin Street, Jilin, Changchun

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Address before: 134700 Xiaoweitanggou, Weitang Community, Sun Jia Bao Zi Street, Jiangyuan District, Baishan City, Jilin Province

Patentee before: HUANENG BAISHAN COAL GANGUE POWER GENERATION CO.,LTD.

Patentee before: Jilin University