CN112944377B - Flue gas dust removal system and starting and stopping method of dust remover - Google Patents
Flue gas dust removal system and starting and stopping method of dust remover Download PDFInfo
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- CN112944377B CN112944377B CN202110205098.4A CN202110205098A CN112944377B CN 112944377 B CN112944377 B CN 112944377B CN 202110205098 A CN202110205098 A CN 202110205098A CN 112944377 B CN112944377 B CN 112944377B
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- dust
- dust remover
- flue gas
- smoke
- valve
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- 239000000428 dust Substances 0.000 title claims abstract description 250
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000003546 flue gas Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000779 smoke Substances 0.000 claims abstract description 84
- 238000004891 communication Methods 0.000 claims abstract description 28
- 238000001816 cooling Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 20
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a flue gas dust removal system and a starting and stopping method of a dust remover, wherein the flue gas dust removal system comprises: dust remover, fan and heater; the dust remover is provided with a smoke inlet, a smoke outlet and an air inlet, the smoke inlet is communicated with the smoke inlet flue, and the smoke outlet is communicated with the smoke outlet flue; the output end of the fan is communicated with the air inlet through a first communication pipe; the heater is arranged on the first communication pipe. The flue gas dust removal system and the starting and stopping method of the dust remover can reduce the influence of the operation of the flue gas dust remover with higher water content, reduce faults and prolong the service life of the dust remover.
Description
Technical Field
The invention relates to the technical field of industrial production, in particular to a flue gas dust removal system and a starting and stopping method of a dust remover.
Background
Flue gas generated by combustion of industrial kilns such as glass kilns is discharged after being treated by a dust remover system. In the flue gas generated by combustion (particularly oxygen-enriched and total-oxygen combustion), the high water content of the flue gas can influence the operation of the dust remover, shorten the service life of the dust remover and even cause the operation failure of the whole flue gas treatment system.
Disclosure of Invention
The invention mainly aims to provide a flue gas dust removal system and a starting and stopping method of a dust remover, and aims to solve the technical problem that flue gas with high water content affects the operation of the dust remover in the prior art.
In order to achieve the above object, the flue gas dust removal system provided by the present invention includes:
the dust remover is provided with a smoke inlet, a smoke outlet and an air inlet, wherein the smoke inlet is communicated with a smoke inlet flue, and the smoke outlet is communicated with a smoke outlet flue;
The output end of the fan is communicated with the air inlet through a first communication pipe;
the heater is arranged on the first communication pipe.
Optionally, the input end of the fan is communicated with the smoke outlet flue through a second communicating pipe, and the connection part of the second communicating pipe and the smoke outlet flue is positioned between the smoke outlet and the output end of the smoke outlet flue.
Optionally, the smoke inlet is provided with a first valve;
the flue gas dust removal system further comprises:
The air inlet pipe is provided with an input end communicated with the atmosphere, an output end communicated with the second communicating pipe, an output end positioned between the fan and the smoke outlet flue, a second valve arranged on the air inlet pipe, and a third valve arranged on the second communicating pipe and positioned between the air inlet pipe and the smoke outlet flue.
Optionally, the air inlet is provided with a fourth valve.
Optionally, the dust remover has a plurality of;
the smoke inlets of all the dust collectors are communicated with the output end of the smoke inlet flue through smoke inlet branch pipes in one-to-one correspondence;
The smoke outlets of all the dust collectors are communicated with the input end of the smoke outlet flue through smoke outlet branch pipes in one-to-one correspondence;
the air inlets of all the dust collectors are communicated with the output end of the first communication pipe through communication branch pipes in one-to-one correspondence;
the first valves are arranged at the smoke inlets of all the dust collectors;
and the fourth valves are arranged at the air inlets of all the dust collectors.
Optionally, a fifth valve is provided on the first communication pipe, and the fifth valve is disposed between the heater and the air inlet.
Optionally, the dust remover is provided with a manhole, and the manhole is provided with a manhole door.
Optionally, the air inlet is at the lower part of the dust remover, and the smoke outlet is at the top of the dust remover.
Optionally, the smoke inlet is arranged at the lower part of the dust remover, and the smoke outlet is arranged at the top of the dust remover.
The starting method of the dust remover provided by the invention comprises the following steps:
Feeding hot air into the dust remover;
and after the temperature in the dust remover is raised to a preset temperature, introducing flue gas into the dust remover, and stopping supplying hot gas into the dust remover.
The invention provides a shutdown method of a dust remover, which comprises the following steps:
stopping supplying the flue gas into the dust remover;
supplying dry and hot air into the dust remover, so that the supplied dry and hot air is replaced by flue gas in the dust remover;
And after the flue gas in the dust remover is completely replaced by the dry hot air, stopping supplying the dry hot air into the dust remover, and cooling the air in the dust remover.
In the technical scheme of the application, before the dust remover is started, heated gas is pumped into the dust remover through the fan, the heater and the first communication pipe, so that the dust remover can be preheated, the environment temperature of flue gas fed into the dust remover is higher, and the problem that when high-temperature flue gas is directly communicated into the non-preheated dust remover, the flue gas is cooled in the dust remover, so that a large amount of moisture in the flue gas is condensed to corrode the inner wall of the dust remover is avoided; after the flue gas is stopped from being supplied into the dust remover due to the conditions of overhauling the dust remover and the like, the dry hot air can be pumped into the dust remover through the fan, the heater and the first communication pipe, so that the original flue gas with higher water content in the dust remover is replaced by the dry hot air, the dust remover is fully filled with the dry hot air and then is cooled, and the phenomenon that the original flue gas with higher water content in the dust remover is condensed in the dust remover due to the cold air when the dust remover is directly cooled can be avoided, so that the inner wall of the dust remover is corroded; by adopting the scheme of the application, the condensation phenomenon in the dust remover can be prevented when the dust remover is started and stopped, the operation of the dust remover can be ensured, the faults are reduced, and the service life of the dust remover is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of a flue gas dust removal system according to the present invention;
FIG. 2 is a schematic diagram showing the connection of a dust collector of the flue gas dust removal system provided by the invention with a flue gas inlet flue and a flue gas outlet flue;
reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The application provides a flue gas dust removal system and a starting and stopping method of a dust remover 200, which can reduce the influence of operation of the flue gas dust remover 200 with higher water content, reduce faults and prolong the service life of the dust remover 200.
As shown in fig. 1 and 2, in an embodiment of the flue gas dust removal system according to the present invention, the flue gas dust removal system includes:
The dust remover 200 is provided with a smoke inlet, a smoke outlet and an air inlet, wherein the smoke inlet is communicated with the smoke inlet flue 110, and the smoke outlet is communicated with the smoke outlet flue 120;
the output end of the fan 400 is communicated with the air inlet through a first communication pipe 510;
The heater 300 is disposed on the first communication pipe 510.
When the dust remover 200 is started (when the dust remover 200 is restarted after being stopped due to the conditions of initial starting, maintenance and the like), if the dust remover 200 is not preheated, the smoke containing a large amount of moisture is directly communicated, and condensation phenomenon can occur in the dust remover 200; in addition, after the running dust remover 200 is stopped, the dust remover 200 is filled with flue gas containing a large amount of moisture, and the flue gas is directly cooled in the dust remover 200 and can be condensed in the dust remover 200; particularly, when the dust remover 200 is required to be overhauled after the shutdown, a large amount of moisture-containing flue gas in the dust remover 200 is required to be discharged, and the flue gas is directly cooled by air when being discharged, so that condensation phenomenon is very easy to occur; the condensed water generated by the condensation phenomenon is adhered to the inside of the dust remover 200, which is liable to cause corrosion of the dust remover 200.
In the above embodiment, before the dust remover 200 is started, the heated gas is pumped into the dust remover 200 through the fan 400, the heater 300 and the first communication pipe 510, so that the dust remover 200 can be preheated, the environmental temperature of the flue gas fed into the dust remover 200 is higher, and the problem that when the flue gas with high temperature is directly introduced into the non-preheated dust remover 200, the flue gas is cooled in the dust remover 200, so that a large amount of moisture in the flue gas is condensed to cause corrosion to the inner wall of the dust remover 200 can be avoided; after the flue gas is stopped from being fed into the dust remover 200 due to the conditions of overhauling the dust remover 200, and the like, the dry hot air can be pumped into the dust remover 200 through the fan 400, the heater 300 and the first communication pipe 510, so that the original flue gas with higher water content in the dust remover 200 is replaced by the dry hot air, the dust remover 200 is filled with the dry hot air and then is cooled, and the phenomenon that the original flue gas with higher water content in the dust remover 200 is condensed when meeting cold air when the dust remover 200 is directly cooled can be avoided, and the inner wall of the dust remover 200 is corroded; when the dust remover 200 needs to be overhauled, the original smoke in the dust remover 200 is completely replaced by the dry hot air pumped into the dust remover 200 during shutdown, and the dry hot air is discharged or cooled, so that the condensation phenomenon can not occur; by the scheme of the application, the condensation phenomenon in the dust remover 200 can be prevented when the dust remover 200 is started, stopped and overhauled, the operation of the dust remover 200 can be ensured, faults are reduced, and the service life of the dust remover 200 is prolonged.
As a further aspect of the above embodiment, the output end of the fan 400 is communicated with the smoke outlet flue 120 through the second communicating pipe 520, and the second communicating pipe 520 is connected with the smoke outlet flue 120 between the smoke outlet and the output end of the smoke outlet flue 120.
In a further scheme of the above embodiment, when the system is started, the air in the whole system such as the smoke outlet branch pipe 121, the smoke outlet flue 120, the first communication pipe 510, the second communication pipe 520, the third communication pipe 530, the dust remover 200 and the like can be utilized to heat circularly and then preheat the dust remover 200, external air is not required to be introduced, the air in the smoke outlet flue 120 circulates in the system after being heated, meanwhile, the original cold air in the dust remover 200 can be brought out by power, and the preheating efficiency is high.
As a further aspect of the above embodiment, the smoke inlet has a first valve 610;
the flue gas dust removal system further comprises:
The air inlet pipe 700 has an input end communicated with the atmosphere, an output end communicated with the second communicating pipe 520, and an output end positioned between the fan 400 and the smoke outlet flue 120, the air inlet pipe 700 is provided with a second valve 620, the second communicating pipe 520 is provided with a third valve 630, and the third valve 630 is positioned between the air inlet pipe 700 and the smoke outlet flue 120.
In a further aspect of the above embodiment, when the first valve 610 is closed during shutdown or maintenance, the supply of the flue gas into the dust remover 200 can be stopped, so as to isolate the dust remover 200; the third valve 630 is closed, the second valve 620 is opened, the fan 400 sucks in the external air through the air inlet pipe 700, the water content in the external air is low, the flue gas in the dust remover 200 is replaced after heating, the condensation phenomenon can be avoided, in addition, the flue gas in the dust remover 200 is replaced by the air, and the personnel can enter the dust remover 200 to overhaul.
After the third valve 630 is arranged, the fan 400 can be a power frequency fan, so that the power frequency fan is more economical, the third valve 630 is closed before the fan 400 is started, the third valve 630 is gradually and slowly opened after the fan 400 is stabilized, and the overload of the power frequency fan during starting can be avoided.
As a further version of the above embodiment, there is a fourth valve 640 at the air inlet.
In a further aspect of the above embodiment, when the dust collector 200 is operating normally, the fourth valve 640 is closed, so that the flue gas is prevented from entering the first communication pipe 510, the second communication pipe 520, the heater 300 and the fan 400.
As a further aspect of the above embodiment, the dust remover 200 has a plurality of;
all the smoke inlets of the dust collectors 200 are communicated with the output ends of the smoke inlet flues 110 through smoke inlet branch pipes 111 which are in one-to-one correspondence;
The smoke outlets of all the dust collectors 200 are communicated with the input end of the smoke outlet flue 120 through smoke outlet branch pipes 121 which are in one-to-one correspondence;
All the air inlets of the dust collectors 200 are communicated with the output ends of the first communication pipes 510 through communication branch pipes 530 in one-to-one correspondence;
all of the dust collectors 200 have a first valve 610 at the smoke inlet;
all of the dust collectors 200 have a fourth valve 640 at the air inlet.
In the further scheme of the embodiment, the plurality of dust collectors 200 are arranged, so that the dust collection efficiency can be improved, and each dust collector 200 can be independently isolated for maintenance by controlling the first valve 610 and the fourth valve 640 of each dust collector 200, so that the work of other dust collectors 200 is not influenced when one dust collector 200 is overhauled, and the dust collection work is continuously carried out.
As a further aspect of the above embodiment, the first communication pipe 510 has a fifth valve 650 thereon, and the fifth valve 650 is disposed between the heater 300 and the air inlet.
In a further aspect of the above embodiment, the first communication pipe 510 has a dual-valve structure, so that the sealing effect can be improved, and the control is facilitated, when the heater 300 heats the gas, the fifth valve 650 can be closed first, and after the air reaches the preset temperature, the fifth valve 650 and the fourth valve 640 are gradually opened, so that the gas with the temperature reaching the preset temperature enters the dust collector 200.
As a further aspect of the above embodiment, the dust collector 200 has a manhole thereon, and the manhole has a manhole door 210.
In a further aspect of the above embodiment, the cooling of the temperature inside the dust collector 200 can be accelerated by opening the manhole door 210, and access to the dust collector 200 is facilitated for service personnel.
As a further aspect of the above embodiment, the air inlet is at the lower part of the dust collector 200, and the smoke outlet is at the top of the dust collector 200.
In a further scheme of the above embodiment, the heated gas enters the dust remover 200 from the lower part, rises in the dust remover 200, and the original gas in the dust remover 200 is discharged into the smoke outlet flue 120 through the smoke outlet at the upper part, so that the original gas in the dust remover 200 can be quickly and comprehensively replaced.
As a further aspect of the above embodiment, the smoke inlet is at the lower part of the dust collector 200, and the smoke outlet is at the top of the dust collector 200.
In the further scheme of the embodiment, when the dust remover 200 works, the flue gas with higher temperature enters the dust remover 200 from the lower part, rises in the dust remover 200 and removes dust, so that the driving of the induced draft fan 400 can be reduced or unnecessary, the energy is saved, and then the flue gas is discharged into the flue gas outlet flue 120 through the flue gas outlet at the upper part, the dust removing path is long, and the dust removing effect is good.
To ensure that the gas supplied into the dust collector 200 is dried, a drying device may be provided on the first communication pipe 510 between the heater 300 and the dust collector 200, or may be provided at the intake end of the intake pipe 700.
All the smoke outlets of the dust collectors 200 are provided with a sixth valve 660, and the first valve 610 and the sixth valve 660 can be butterfly valves.
When a certain dust remover 200 is started, the first valve 610 of the dust remover 200 is closed, the sixth valve 660 and the fourth valve 640 of the dust remover 200 are opened, the third valve 630 is closed, the fifth valve 650 is opened or closed, the fan 400 is started, in order to improve economy, the fan 400 can be an industrial frequency fan, after the fan is stabilized, the third valve 630 is gradually and slowly opened until the third valve 630 is fully opened, so that the gas in the space communicated with the fan 400 in the whole system circulates, then the heater 300 is started, the circulated gas is heated, the heated gas is pumped into the corresponding dust remover 200, the dust remover 200 is preheated, the heated gas circulates among the dust remover 200, the smoke outlet flue 120, the second communicating pipe 520 and the first communicating pipe 510, after the dust remover 200 is preheated, the heater 300, the fan 400, the third valve 630, the fifth valve 650 and the fourth valve 640 of the dust remover 200 are closed, the heated gas supplied into the dust remover 200 is stopped, and the first valve 610 is opened, and the smoke enters the dust remover 200 for dust removal.
Before the fan 400 is stable, the third valve 630 is closed, so that the load of the fan 400 during starting can be reduced, and the phenomena of tripping and the like caused by overlarge load of the power frequency fan during starting can be avoided.
In the normal operation process of the flue gas dust removal system, when a certain dust remover 200 needs to be shut down, the third valve 630 is closed, the second valve 620, the fifth valve 650, the heater 300 and the fan 400 are opened, the fourth valve 640 of the dust remover 200 is opened, dry hot air is introduced into the dust remover 200, the first valve 610 of the dust remover 200 is closed, the supply of flue gas into the dust remover 200 is stopped, after the dry hot air to be supplied completely replaces the original flue gas in the dust remover 200, the air in the dust remover 200 is cooled, the heater 300 can be closed, cold air is introduced into the dust remover 200 through the fan 400 during cooling, so as to accelerate the cooling of the dust remover 200, meanwhile, the manhole door 210 can be opened, the cooling of the dust remover 200 is further accelerated, and after the dust remover 200 is cooled, the fan 400, the second valve 620, the fifth valve 650 and the fourth valve 640 of the dust remover 200 are closed.
When the smoke dust removal system needs to be overhauled in the normal operation process, after the shutdown step is completed, an overhauler enters the dust remover 200 through a manhole for overhauling.
The embodiment of the starting method of the dust remover provided by the invention adopts the flue gas dust removal system, and comprises the following steps:
Feeding hot air into the dust collector 200;
After the temperature in the dust remover 200 is raised to a preset temperature, flue gas is introduced into the dust remover 200, and the supply of hot gas into the dust remover 200 is stopped.
Specifically, when a certain dust collector 200 is started, the first valve 610 of the dust collector 200 is closed, the sixth valve 660 and the fourth valve 640 of the dust collector 200 are opened, the third valve 630 is closed, the fifth valve 650 is opened or closed, the fan 400 is started, in order to improve economy, the fan 400 can be an industrial frequency fan, after the fan is stabilized, the third valve 630 is gradually and slowly opened until the third valve 630 is fully opened, the gas in the space communicated with the fan 400 in the whole system circulates, then the heater 300 is opened, the circulated gas is heated, the heated gas is pumped into the corresponding dust collector 200, the dust collector 200 is preheated, the heated gas circulates among the dust collector 200, the smoke outlet flue 120, the second communicating pipe 520 and the first communicating pipe 510, after the dust collector 200 is preheated, the heater 300, the fan 400, the third valve 630, the fifth valve 650 and the fourth valve 640 of the dust collector 200 are closed, the heated gas is stopped being fed into the dust collector 200, and the first valve 610 is opened, and the flue gas is allowed to enter the dust collector 200 to be dedusted.
Before the fan 400 is stable, the third valve 630 is closed, so that the load of the fan 400 during starting can be reduced, and the phenomena of tripping and the like caused by overlarge load of the power frequency fan during starting can be avoided.
The embodiment of the shutdown method of the dust remover provided by the invention adopts the flue gas dust removal system, and comprises the following steps:
stopping the supply of the flue gas into the dust remover 200;
Supplying dry and hot air into the dust remover 200, so that the supplied dry and hot air is replaced by flue gas in the dust remover 200;
after the flue gas in the dust collector 200 is completely replaced by the dry hot air, the supply of the dry hot air into the dust collector 200 is stopped, and the air in the dust collector 200 is cooled.
Specifically, when a certain dust collector 200 needs to be shut down during normal operation of the flue gas dust removal system, the third valve 630 is closed, the second valve 620, the fifth valve 650, the heater 300 and the fan 400 are opened, the fourth valve 640 of the dust collector 200 is opened, dry hot air is introduced into the dust collector 200, the first valve 610 of the dust collector 200 is closed, the flue gas supply into the dust collector 200 is stopped, after the dry hot air to be supplied completely replaces the original flue gas in the dust collector 200, the air in the dust collector 200 is cooled, the heater 300 can be closed during cooling, cold air is introduced into the dust collector 200 through the fan 400 to accelerate the cooling of the dust collector 200, meanwhile, the manhole door 210 can be opened to further accelerate the cooling of the dust collector 200, and after the dust collector 200 is cooled, the fan 400, the second valve 620, the fifth valve 650 and the fourth valve 640 of the dust collector 200 are closed.
The embodiment of the overhauling method of the dust remover provided by the invention adopts the flue gas dust removal system, and after the shutdown method of the dust remover is finished, the method further comprises the following steps:
after the air in the dust remover 200 is cooled, the dust remover 200 is overhauled.
The maintainer can enter the dust remover 200 for maintenance through the manhole.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (5)
1. A flue gas dust removal system, comprising:
the dust remover is provided with a smoke inlet, a smoke outlet and an air inlet, wherein the smoke inlet is communicated with a smoke inlet flue, and the smoke outlet is communicated with a smoke outlet flue;
The output end of the fan is communicated with the air inlet through a first communication pipe;
the heater is arranged on the first communication pipe;
The input end of the fan is communicated with the smoke outlet flue through a second communicating pipe, and the connection part of the second communicating pipe and the smoke outlet flue is positioned between the smoke outlet and the output end of the smoke outlet flue;
The smoke inlet is provided with a first valve;
the flue gas dust removal system further comprises:
The input end of the air inlet pipe is communicated with the atmosphere, the output end of the air inlet pipe is communicated with the second communicating pipe, the output end of the air inlet pipe is positioned between the fan and the smoke outlet flue, a second valve is arranged on the air inlet pipe, a third valve is arranged on the second communicating pipe, and the third valve is positioned between the air inlet pipe and the smoke outlet flue;
The air inlet is provided with a fourth valve;
The dust remover is provided with a plurality of dust collectors;
the smoke inlets of all the dust collectors are communicated with the output end of the smoke inlet flue through smoke inlet branch pipes in one-to-one correspondence;
The smoke outlets of all the dust collectors are communicated with the input end of the smoke outlet flue through smoke outlet branch pipes in one-to-one correspondence;
the air inlets of all the dust collectors are communicated with the output end of the first communication pipe through communication branch pipes in one-to-one correspondence;
the first valves are arranged at the smoke inlets of all the dust collectors;
and the fourth valves are arranged at the air inlets of all the dust collectors.
2. The flue gas dust removal system of claim 1, wherein said dust collector has a manhole thereon, said manhole having a manhole door.
3. The flue gas dust removal system of claim 1, wherein said air inlet is in a lower portion of said dust collector and said flue gas outlet is in a top portion of said dust collector.
4. The flue gas dust removal system of claim 1, wherein said flue gas inlet is in a lower portion of said dust collector and said flue gas outlet is in a top portion of said dust collector.
5. A shutdown method of a dust remover, characterized in that a flue gas dust removal system as claimed in any one of claims 1 to 4 is used; the method comprises the following steps:
stopping supplying the flue gas into the dust remover;
supplying dry and hot air into the dust remover, so that the supplied dry and hot air is replaced by flue gas in the dust remover;
And after the flue gas in the dust remover is completely replaced by the dry hot air, stopping supplying the dry hot air into the dust remover, and cooling the air in the dust remover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110205098.4A CN112944377B (en) | 2021-02-23 | 2021-02-23 | Flue gas dust removal system and starting and stopping method of dust remover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110205098.4A CN112944377B (en) | 2021-02-23 | 2021-02-23 | Flue gas dust removal system and starting and stopping method of dust remover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112944377A CN112944377A (en) | 2021-06-11 |
| CN112944377B true CN112944377B (en) | 2024-05-31 |
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Family Applications (1)
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| CN202110205098.4A Active CN112944377B (en) | 2021-02-23 | 2021-02-23 | Flue gas dust removal system and starting and stopping method of dust remover |
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