CN111482012A - Smoke treatment system for galvanizing bath and treatment method thereof - Google Patents
Smoke treatment system for galvanizing bath and treatment method thereof Download PDFInfo
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- CN111482012A CN111482012A CN202010304857.8A CN202010304857A CN111482012A CN 111482012 A CN111482012 A CN 111482012A CN 202010304857 A CN202010304857 A CN 202010304857A CN 111482012 A CN111482012 A CN 111482012A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4227—Manipulating filters or filter elements, e.g. handles or extracting tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/003—Apparatus
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/025—Other waste gases from metallurgy plants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Organic Chemistry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention relates to a galvanizing bath smoke dust treatment system and a treatment method thereof, which are characterized in that: the device comprises at least two filter bag dust removal modules, an air supply module and a control module, wherein the input ends of the filter bag dust removal modules extend to a galvanizing bath, the air supply module is used for supplying air to dust removal parts of the filter bag dust removal modules and enabling smoke dust on the dust removal parts to fall and is provided with a first air supply end and a second air supply end, and the control module is used for controlling the dust removal parts of the filter bag dust removal modules to be synchronously far away from the first air supply end and close to the second air supply end or synchronously far away from the second air supply end and close to the first air supply end; the invention has the beneficial effects that: the filter bag can be cleaned, the filter effect of the filter bag on air is guaranteed, and meanwhile the dust removal effect on the galvanizing bath is also guaranteed.
Description
Technical Field
The invention relates to the technical field of dust removal equipment, in particular to a system and a method for treating smoke dust for a galvanizing bath.
Background
The zinc bath (galvanizing bath) is an important device in the production of hot galvanizing, and a large amount of dust is generated in the production process of hot galvanizing, so that a dust removal device is usually matched in the galvanizing process, however, after the conventional dust removal device is washed for a period of time, a large amount of dust (also called dust deposition) is accumulated on a filter bag inside the conventional dust removal device, and the dust removal effect of the dust removal device is affected.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a galvanizing bath smoke dust treatment system and a galvanizing bath smoke dust treatment method, and aims to solve the problems in the background art.
The technical scheme of the invention is realized as follows: the utility model provides a smoke and dust processing system for galvanizing bath which characterized in that: the device comprises at least two filter bag dust removal modules with input ends extending to a galvanizing bath, an air supply module used for supplying air to dust removal parts of the filter bag dust removal modules and enabling smoke dust on the dust removal parts to fall and provided with a first air supply end and a second air supply end, and a control module used for controlling each dust removal part of the filter bag dust removal module to be away from the first air supply end synchronously and close to the second air supply end or away from the second air supply end synchronously and close to the first air supply end.
Preferably: the filter bag dust removal module comprises a dust removal box, a purified gas outlet arranged on the dust removal box, an air inlet arranged in the dust removal box, an air inlet pipe communicated with the air inlet, an input end of the air inlet pipe extending to a galvanizing bath, a fan arranged at the purified gas outlet, a partition plate arranged in the dust removal box and dividing the interior of the dust removal box into a first cavity communicated with the purified gas outlet and a second cavity communicated with the air inlet; the second chamber is internally provided with a filter bag, one end of the filter bag is fixedly connected with each mounting port, and each filter bag forms the dust removal part; and a dust exhaust port is formed in the bottom of the dust removal box.
Preferably: the air supply module consists of a first air supply system and a second air supply system; the first air supply system comprises a first air pump, a first air supply main pipe connected with the output end of the first air pump, a node formed at the output end of the first air supply main pipe and a plurality of first air supply branch pipes connected with the node in series, the first air supply branch pipes are distributed in the second chamber and positioned between the filter bags and in the first chamber and positioned above the filter plate, and a plurality of first nozzles with output ends respectively facing the filter bags or the mounting openings are distributed on the first air supply branch pipes; the second air supply system comprises a plurality of second air pumps, a plurality of second air supply main pipes connected with the output ends of the second air pumps, a plurality of control valves with one input end and a plurality of output ends, wherein the input ends of the control valves are communicated with the second air supply main pipes, and a plurality of second air supply branch pipes communicated with the output ends of the control valves; each first nozzle forms the first air supply end, and each second nozzle forms the second air supply end.
Preferably: the output ends of the first nozzles on the first air supply branch pipes and the output ends of the second nozzles on the second air supply branch pipes between the filter bags are arranged downwards in an inclined mode.
Preferably: the control module comprises a first slide rail and a second slide rail which are longitudinally arranged in the first chamber at intervals, a first clamping seat and a second clamping seat which are connected with the second slide rail in a sliding way and fixedly connected with the filter plate respectively, and a driving part for driving the first clamping seat and the second clamping seat to be far away from or close to each other; the driving part comprises an air cylinder for controlling the first clamping seat to move, a first rack fixedly connected to the first clamping seat and slidably connected with the first sliding rail, and a gear rotatably connected with the inner side wall of the first cavity and meshed with the first rack, and a second rack meshed with the gear is mounted on the second clamping seat.
Preferably: the air pump control system also comprises a control system used for controlling the first air pump, the second air pump, the control valve and the air cylinder; the control system comprises a central control unit, and a first controller, a second controller, a third controller and a fourth controller which are respectively electrically connected with the central control unit and respectively used for controlling the first air pump, the second air pump, the control valve and the air cylinder; a communication interface between the first controller and the fourth controller is electrically connected to form a linkage mode; in the linkage mode, the central control unit sends an electric signal to the first controller and drives the first air pump to work, meanwhile, the first controller sends an electric signal to the fourth controller, and the fourth controller controls the air cylinder to move based on the signal.
In addition, the invention also provides a galvanizing bath smoke treatment method which uses the smoke treatment system and is characterized by comprising the following steps:
s1: a fan at the precursor pneumatic clean air outlet is used for pumping out air in the dust removal box;
s2: because negative pressure is generated in the dust removal box, air at the galvanizing bath enters the second chamber through the air inlet pipe;
s3: the air in the second chamber is filtered by the filter bag, enters the first chamber through the mounting port and is finally discharged through the purified air outlet;
s4: the particles filtered by the filter bag fall to the bottom of the second chamber and are discharged through the dust discharge port.
Preferably: still include the filter bag deashing step, the filter bag deashing step includes:
a1: the central control unit sends an electric signal to the first controller and drives the first air pump to ventilate the first air supply main pipe, and the first air supply main pipe supplies air to each first air supply branch pipe and is sprayed out by first nozzles arranged on the first air supply branch pipes;
a2: meanwhile, the air cylinder operates and drives the filter bags to be away from each other, in the moving process of the filter bags, part of the first nozzles supply air to the surfaces of the filter bags and drop the deposited dust attached to the filter bags, and the other part of the first nozzles supply air to the interior of the filter bags through the mounting openings and slightly expand the filter bags, so that the deposited dust on the filter bags drops;
a3: in the moving process of the filter bag, air sprayed by the first nozzle in the first cavity enters the filter bag at intervals, and the filter bag is repeatedly expanded and contracted, so that dust deposited on the filter bag drops.
Preferably: still include the filter bag and get rid of grey step, the filter bag gets rid of grey step and includes:
b1: when each filter bag moves to the farthest position, each filter bag is respectively arranged between each filter bag and each second nozzle;
b2: the central control unit sends an electric signal to the second controller and drives the first controller and the second controller to stop simultaneously;
b3: the second controller drives the second air pump to work, air is sent into the second air supply main pipe, an electric signal is sent to the second controller, the third controller is driven to control the control valve to switch the channel, air flow in the second air supply main pipe is sprayed out to the filter bags from the second nozzles of the second air supply branch pipes at intervals, the filter bags are swung back and forth, and dust on the surfaces of the filter bags drops.
Preferably: and B3, taking the height direction as a reference, and carrying out staggered air injection on the filter bags by the second nozzles which simultaneously exhaust air at two sides of each filter bag in the step B3.
The invention has the beneficial effects that:
firstly, the air supply system can be used for blowing air to the surface of the filter bag in the second chamber, so that dust deposited on the surface of the filter bag falls off, the effect of the filter bag on dust is further ensured, and the dust absorption effect on a galvanizing bath is further ensured;
secondly, the control module operates and moves the filter bags while the air supply system blows air to the surfaces of the filter bags, and blows air to the surfaces of the filter bags while moving, so that the dust cleaning efficiency of the surfaces of the filter bags can be further improved, moreover, the control module can simultaneously drive the filter bags to be close to each other and far away from each other, the dust cleaning degrees of the filter bags can be the same, and the dust filtering effect of a dust removing device (namely, a filter bag dust removing module and the like) is prevented from being influenced by different dust deposition states of the filter bags after dust cleaning and a period of time;
thirdly, a linkage mode of the control system is adopted, the control module and the first air supply system can be driven to be carried out simultaneously, so that the normal operation of the dust removing step of the filter bag can be ensured, the dust removing effect of the filter bag is further ensured, and the filtering effect of the dust removing device is further ensured;
fourthly, the second air supply system is adopted to enable the filter bag to carry out the step of dust throwing, so that the dust cleaning effect of the filter bag is further improved, and the dust filtering effect of the dust removing device is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic structural diagram of a first air supply system according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view taken at C-C of FIG. 1;
FIG. 6 is a cross-sectional view taken along line D-D of FIG. 5;
FIG. 7 is an enlarged view of section E of FIG. 1;
FIG. 8 is a schematic diagram of a control system in accordance with an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-8, the present invention discloses a galvanized bath smoke dust treatment system, which comprises, in an embodiment of the present invention, two filter bag dust removal modules 1 having input ends extending to a galvanized bath, an air supply module for supplying air to dust removal portions of the filter bag dust removal modules 1 and allowing smoke dust on the dust removal portions to fall and having a first air supply end 21 and a second air supply end 22, and a control module 3 for controlling each dust removal portion of the filter bag dust removal modules 1 to be synchronously away from the first air supply end 21 and close to the second air supply end 22 or synchronously away from the second air supply end 22 and close to the first air supply end 21.
In the embodiment of the present invention, the filter bag dust removal module 1 includes a dust removal box 100, a clean air outlet 101 disposed on the dust removal box 100, an air inlet 102 disposed in the dust removal box 100, an air inlet pipe 103 communicated with the air inlet 102 and having an input end extending to a galvanizing bath, a fan 104 installed at the clean air outlet 101, a partition plate 100c installed in the dust removal box 100 and dividing the interior of the dust removal box 100 into a first chamber 100a respectively communicated with the clean air outlet 101 and a second chamber 100b respectively communicated with the air inlet 102; the partition plate 100c is provided with two slideways 1000 arranged at intervals, the partition plate 100c is provided with two filter plates 100d which are connected with the partition plate 100c in a sliding manner and used for covering the slideways 1000, the filter plates 100d are provided with mounting ports 100e, filter bags 105 of which one ends are fixedly connected with the mounting ports 100c are arranged in the second chamber 100b, and each filter bag 105 forms the dust removing part; the bottom of the dust removing box 100 is provided with a dust discharging port 106.
In the specific embodiment of the present invention, the air supply module is composed of a first air supply system 21 and a second air supply system 22; the first air supply system 21 includes a first air pump 210, a first air supply main pipe 211 connected to an output end of the first air pump 210, a node 212 formed at an output end of the first air supply main pipe 211, and two first air supply branch pipes 213 connected in series with the node 212, where the first air supply branch pipes 213 are distributed in the second chamber 100b and located between the filter bags 105 and in the first chamber 100a and located above the filter plate 100d, and a plurality of first nozzles 2130 having output ends respectively facing the filter bags 105 or the mounting openings 100e are distributed on the first air supply branch pipes 213; the second air supply system 22 comprises a plurality of second air pumps 220, a plurality of second air supply main pipes 221 connected with the output ends of the second air pumps 220, a plurality of control valves 222 with one input end and a plurality of output ends, wherein the input ends of the control valves 222 are communicated with the second air supply main pipes 221, and a plurality of second air supply branch pipes 223 communicated with the output ends of the control valves 222, wherein each second air supply main pipe 221 penetrates into the dust removal box 100 and is attached to the inner wall of the dust removal box 100, longitudinally extends to the middle part of the dust removal box 100 and is respectively positioned at two sides of the filter bag 105, the output ends of each second air supply branch pipe 223 are longitudinally distributed at equal intervals and face the filter bag 105, and second nozzles 223a are arranged at the output ends of each second air supply branch pipe 223; each first nozzle 2130 forms the first air supply end 21, and each second nozzle 223a forms the second air supply end 22.
In the embodiment of the present invention, the output ends of the first nozzles 2130 of the first air supply branch pipes 213 and the second nozzles 223a of the second air supply branch pipes 223 between the filter bags 105 are arranged obliquely downward.
In the embodiment of the present invention, the control module 3 includes a first slide rail 31 and a second slide rail 32 longitudinally installed in the first chamber 100a at intervals, two first clamping seats 311 and two second clamping seats 312 slidably connected to the second slide rail 32 and fixedly connected to the filter plate 100d, respectively, and a driving portion 33 for driving the first clamping seats 311 and the second clamping seats 312 to move away from or close to each other; the driving portion 33 includes an air cylinder 330 for controlling the first holder 311 to move, a first rack 331 fixedly connected to the first holder 311 and slidably connected to the first slide rail 31, and a gear 332 rotatably connected to an inner sidewall of the first chamber 100a and engaged with the first rack 331, and the second holder 312 is mounted with a second rack 333 engaged with the gear 332.
In the embodiment of the present invention, the control system 4 is further included for controlling the first air pump 210, the second air pump 220, the control valve 222, and the air cylinder 330; the control system 4 includes a central control unit 40, and a first controller 41, a second controller 42, a third controller 43, and a fourth controller 44 electrically connected to the central control unit 40 and respectively controlling the first air pump 210, the second air pump 220, the control valve 222, and the air cylinder 330; the communication interface between the first controller 41 and the fourth controller 44 is electrically connected to form a linkage mode; in the linkage mode, the central control unit 40 sends an electric signal to the first controller 41 and drives the first air pump 210 to operate, and at the same time, the first controller 41 sends an electric signal to the fourth controller 44, and the fourth controller 44 controls the air cylinder 330 to move based on the signal.
The embodiment also provides a method for treating the smoke of the galvanizing bath, which uses the smoke treatment system and is characterized by comprising the following steps:
s1: a fan at the precursor pneumatic clean air outlet is used for pumping out air in the dust removal box;
s2: because negative pressure is generated in the dust removal box, air at the galvanizing bath enters the second chamber through the air inlet pipe;
s3: the air in the second chamber is filtered by the filter bag, enters the first chamber through the mounting port and is finally discharged through the purified air outlet;
s4: the particles filtered by the filter bag fall to the bottom of the second chamber and are discharged through the dust discharge port.
In the specific embodiment of the invention, the method further comprises a filter bag dust cleaning step, wherein the filter bag dust cleaning step comprises the following steps:
a1: the central control unit sends an electric signal to the first controller and drives the first air pump to ventilate the first air supply main pipe, and the first air supply main pipe supplies air to each first air supply branch pipe and is sprayed out by first nozzles arranged on the first air supply branch pipes;
a2: meanwhile, the air cylinder operates and drives the filter bags to be away from each other, in the moving process of the filter bags, part of the first nozzles supply air to the surfaces of the filter bags and drop the deposited dust attached to the filter bags, and the other part of the first nozzles supply air to the interior of the filter bags through the mounting openings and slightly expand the filter bags, so that the deposited dust on the filter bags drops;
a3: in the moving process of the filter bag, air sprayed by the first nozzle in the first cavity enters the filter bag at intervals, and the filter bag is repeatedly expanded and contracted, so that dust deposited on the filter bag drops.
In the specific embodiment of the invention, the method further comprises a filter bag ash throwing step, wherein the filter bag ash throwing step comprises the following steps:
b1: when each filter bag moves to the farthest position, each filter bag is respectively arranged between each filter bag and each second nozzle;
b2: the central control unit sends an electric signal to the second controller and drives the first controller and the second controller to stop simultaneously;
b3: the second controller drives the second air pump to work, air is sent into the second air supply main pipe, an electric signal is sent to the second controller, the third controller is driven to control the control valve to switch the channel, air flow in the second air supply main pipe is sprayed out to the filter bags from the second nozzles of the second air supply branch pipes at intervals, the filter bags are swung back and forth, and dust on the surfaces of the filter bags drops.
In the specific embodiment of the invention, the second nozzles which simultaneously discharge air on both sides of each filter bag in the step B3 perform staggered air injection on the filter bags on the basis of the height direction.
The principle of the embodiment:
referring to fig. 1, in the embodiment, firstly, the fan is driven to operate, negative pressure is generated in the first chamber and the second chamber, so that air at the galvanizing bath enters the second chamber from the air inlet pipe, air of a mixture (namely, air and impurity particles) in the second chamber passes through each filter bag and enters the first chamber through the mounting port, and is finally discharged from the dust discharge port, and the impurity particles which cannot pass through the filter bags fall to the bottom of the second chamber and are discharged through the dust discharge port, so that dust removal is completed;
after the dust removal module (i.e., the filter bag dust removal module) of this embodiment removes dust from the galvanizing bath for a period of time, a large amount of deposited dust is attached to the surface of the dust removal part (i.e., each filter bag) inside the galvanizing bath, and in order to avoid affecting the filtering effect of the filter bags, the filter bag dust removal operation of this embodiment is started (the fan stops operating):
referring to fig. 1-4 and fig. 7, firstly, the central control unit sends an execution signal to the first controller, and the execution signal is transmitted to the fourth controller by the first controller, and simultaneously the air first air pump and the air cylinder work, when the air cylinder works, the air cylinder firstly pushes the first clamping seat to move and pushes the first rack fixedly connected with the first clamping seat to move, when the first rack moves, the first rack drives the gear to rotate, and the rotation of the gear drives the second rack to move, and the reverse movement of the first rack and the second rack can be realized due to the rotation of the gear, so that the movement of the first clamping seat and the second clamping seat is opposite, and the first clamping seat and the second clamping seat are respectively fixedly connected with each filter plate, so that each filter plate can be driven to move, and each filter bag is also driven to move; meanwhile, the first air pump works, gas is sent into the first air supply main pipe and enters the first air supply branch pipe, and finally the gas is sprayed to the surface of each filter bag from the first nozzle, so that dust on the surface of each filter bag is blown away, the dust on the filter bags is further prevented from being deposited, and the filtering effect of the filter bags on the mixer is further ensured;
secondly, when the cylinder drives first holder and second holder to move to the both sides of second cavity to be located between the second nozzle, refer to fig. 5 and fig. 6, move to the both sides of second cavity when each filter bag to be located between the second nozzle, get rid of grey work and begin:
the first air pump and the air cylinder stop working, the position of the top of the filter bag (namely, the mounting port) is kept unchanged, the central control unit sends an electric signal to the second controller and the third controller and drives the second air pump and the control valve to work, the second air pump sends air to the second air supply main pipe and the air is respectively sprayed out from each second air supply branch pipe and the second nozzles through an air flow channel in the control valve (refer to fig. 6), each second air supply system of the embodiment comprises three second nozzles, and taking fig. 6 as an example, when the top second nozzle on the left side is used for air outlet, the middle second nozzle on the right side is used for air outlet; when the second nozzle in the middle of the left side is used for exhausting air, the second nozzle at the bottom of the right side is used for exhausting air; when the second nozzle at the bottom of the left side is used, the second nozzle at the top of the right side is used for exhausting air; the filter bags between the second nozzles are blown in the sequence, so that the filter bags can be shaken, dust deposited on the surfaces of the filter bags can fall off, the filter bags are cleaned, the filter bags are driven to reset through the air cylinders after the cleaning is finished, the first air pump works again in the resetting process and blows air to the filter bags, the final ending work is finished, the cleaning effect on the filter bags is further improved, and the fan is driven to run again to start the dust removal work after the filter bags are reset;
it should be noted that:
firstly, because the bottom of the second air supply branch pipe of the first chamber is provided with a plurality of first nozzles facing the mounting port (the first nozzles are vertically arranged with the filter plate), in the moving process of the filter bag (namely, in the moving process of the mounting port), the airflow of the first nozzles can enter each filter bag through the mounting port at intervals (namely, when the mounting port moves to a position between adjacent first nozzles, the gas sprayed by the first nozzles can not completely enter the filter bag, at the moment, the filter bag shrinks, when the mounting port moves to a position right below the first nozzles, the gas sprayed by the first nozzles completely enters the filter bag, at the moment, the filter bag expands), the cleaning effect on the surface of the filter bag can be improved, and the using effect of the filter bag is further ensured;
secondly, the linkage mode can guarantee that the clearance degree to each filter bag is the same, promptly: the moving path of each filter bag and the blowing amount of the first air supply system or the second air supply system in the moving process are ensured to be the same, so that the cleaning effect of the two filter bags is ensured;
and thirdly, each first nozzle and each second nozzle are obliquely arranged downwards, so that deposited dust falling off from the surface of the filter bag can be blown to the bottom of the second cavity, the efficiency of discharging the deposited dust from the second cavity is improved, and the cleaning efficiency of the filter bag is also improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a smoke and dust processing system for galvanizing bath which characterized in that: the device comprises at least two filter bag dust removal modules with input ends extending to a galvanizing bath, an air supply module used for supplying air to dust removal parts of the filter bag dust removal modules and enabling smoke dust on the dust removal parts to fall and provided with a first air supply end and a second air supply end, and a control module used for controlling each dust removal part of the filter bag dust removal module to be away from the first air supply end synchronously and close to the second air supply end or away from the second air supply end synchronously and close to the first air supply end.
2. The fume treatment system for the galvanizing bath according to claim 1, wherein: the filter bag dust removal module comprises a dust removal box, a purified gas outlet arranged on the dust removal box, an air inlet arranged in the dust removal box, an air inlet pipe communicated with the air inlet, an input end of the air inlet pipe extending to a galvanizing bath, a fan arranged at the purified gas outlet, a partition plate arranged in the dust removal box and dividing the interior of the dust removal box into a first cavity communicated with the purified gas outlet and a second cavity communicated with the air inlet; the second chamber is internally provided with a filter bag, one end of the filter bag is fixedly connected with each mounting port, and each filter bag forms the dust removal part; and a dust exhaust port is formed in the bottom of the dust removal box.
3. The fume treatment system for the galvanizing bath according to claim 2, wherein: the air supply module consists of a first air supply system and a second air supply system; the first air supply system comprises a first air pump, a first air supply main pipe connected with the output end of the first air pump, a node formed at the output end of the first air supply main pipe and a plurality of first air supply branch pipes connected with the node in series, the first air supply branch pipes are distributed in the second chamber and positioned between the filter bags and in the first chamber and positioned above the filter plate, and a plurality of first nozzles with output ends respectively facing the filter bags or the mounting openings are distributed on the first air supply branch pipes; the second air supply system comprises a plurality of second air pumps, a plurality of second air supply main pipes connected with the output ends of the second air pumps, a plurality of control valves with one input end and a plurality of output ends, wherein the input ends of the control valves are communicated with the second air supply main pipes, and a plurality of second air supply branch pipes communicated with the output ends of the control valves; each first nozzle forms the first air supply end, and each second nozzle forms the second air supply end.
4. The fume treatment system for a zinc-plating bath according to claim 3, characterized in that: the output ends of the first nozzles on the first air supply branch pipes and the output ends of the second nozzles on the second air supply branch pipes between the filter bags are arranged downwards in an inclined mode.
5. A fume treatment system for a zinc-plating bath according to claim 3 or 4, characterized in that: the control module comprises a first slide rail and a second slide rail which are longitudinally arranged in the first chamber at intervals, a first clamping seat and a second clamping seat which are connected with the second slide rail in a sliding way and fixedly connected with the filter plate respectively, and a driving part for driving the first clamping seat and the second clamping seat to be far away from or close to each other; the driving part comprises an air cylinder for controlling the first clamping seat to move, a first rack fixedly connected to the first clamping seat and slidably connected with the first sliding rail, and a gear rotatably connected with the inner side wall of the first cavity and meshed with the first rack, and a second rack meshed with the gear is mounted on the second clamping seat.
6. The fume treatment system for the galvanizing bath according to claim 5, wherein: the air pump control system also comprises a control system used for controlling the first air pump, the second air pump, the control valve and the air cylinder; the control system comprises a central control unit, and a first controller, a second controller, a third controller and a fourth controller which are respectively electrically connected with the central control unit and respectively used for controlling the first air pump, the second air pump, the control valve and the air cylinder; a communication interface between the first controller and the fourth controller is electrically connected to form a linkage mode; in the linkage mode, the central control unit sends an electric signal to the first controller and drives the first air pump to work, meanwhile, the first controller sends an electric signal to the fourth controller, and the fourth controller controls the air cylinder to move based on the signal.
7. A method for treating fumes of a galvanizing bath using the fume treatment system of claim 1, comprising the steps of:
s1: a fan at the precursor pneumatic clean air outlet is used for pumping out air in the dust removal box;
s2: because negative pressure is generated in the dust removal box, air at the galvanizing bath enters the second chamber through the air inlet pipe;
s3: the air in the second chamber is filtered by the filter bag, enters the first chamber through the mounting port and is finally discharged through the purified air outlet;
s4: the particles filtered by the filter bag fall to the bottom of the second chamber and are discharged through the dust discharge port.
8. The method for treating fumes of a galvanizing bath according to claim 7, characterized in that: still include the filter bag deashing step, the filter bag deashing step includes:
a1: the central control unit sends an electric signal to the first controller and drives the first air pump to ventilate the first air supply main pipe, and the first air supply main pipe supplies air to each first air supply branch pipe and is sprayed out by first nozzles arranged on the first air supply branch pipes;
a2: meanwhile, the air cylinder operates and drives the filter bags to be away from each other, in the moving process of the filter bags, part of the first nozzles supply air to the surfaces of the filter bags and drop the deposited dust attached to the filter bags, and the other part of the first nozzles supply air to the interior of the filter bags through the mounting openings and slightly expand the filter bags, so that the deposited dust on the filter bags drops;
a3: in the moving process of the filter bag, air sprayed by the first nozzle in the first cavity enters the filter bag at intervals, and the filter bag is repeatedly expanded and contracted, so that dust deposited on the filter bag drops.
9. The method for treating fumes in a galvanizing bath according to claim 8, wherein: still include the filter bag and get rid of grey step, the filter bag gets rid of grey step and includes:
b1: when each filter bag moves to the farthest position, each filter bag is respectively arranged between each filter bag and each second nozzle;
b2: the central control unit sends an electric signal to the second controller and drives the first controller and the second controller to stop simultaneously;
b3: the second controller drives the second air pump to work, air is sent into the second air supply main pipe, an electric signal is sent to the second controller, the third controller is driven to control the control valve to switch the channel, air flow in the second air supply main pipe is sprayed out to the filter bags from the second nozzles of the second air supply branch pipes at intervals, the filter bags are swung back and forth, and dust on the surfaces of the filter bags drops.
10. The method for treating fumes of a galvanizing bath according to claim 9, characterized in that: and B3, taking the height direction as a reference, and carrying out staggered air injection on the filter bags by the second nozzles which simultaneously exhaust air at two sides of each filter bag in the step B3.
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