CN101797570B - Curtain-type soot treatment and purification system for hot galvanizing and method thereof - Google Patents
Curtain-type soot treatment and purification system for hot galvanizing and method thereof Download PDFInfo
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- CN101797570B CN101797570B CN201010122408.8A CN201010122408A CN101797570B CN 101797570 B CN101797570 B CN 101797570B CN 201010122408 A CN201010122408 A CN 201010122408A CN 101797570 B CN101797570 B CN 101797570B
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Abstract
The invention relates to a curtain-type soot treatment and purification system for hot galvanizing and a method thereof. The system comprises a galvanizing soot collecting device and a galvanizing soot purification device, wherein the galvanizing soot gathering device comprises a curtain system, a supporting system, a drive system and an air draft pipeline system; the galvanizing soot purification device comprises a purification processing tower and a centrifugal fan. In the galvanizing production process, when galvanizing travelling vehicle travels above a zinc pot, a piece to be plated is dipped into zinc bath, the curtain quickly lowers to form a gas hood; the air draft pipeline system on the top automatically extracts soot and introduces the soot into the purification processing tower; after being purified and adsorbed, soot is discharged into atmosphere; after galvanization ends, the curtain quickly rises and returns, and a plating piece moves to the subsequent processing working procedure. The invention has favorable collection, purification and adsorption effect on galvanizing soot, has low energy consumption, simple structure, convenient manufacture and maintenance, small floor area and small affect on galvanizing effect, and is suitable for liner hot galvanizing production lines, and the collection efficiency is above 95%.
Description
Technical field
The present invention relates to galvanizing smoke and dust treatment technical field in galvanizing production, particularly relate to a kind of curtain-type soot treatment and purification system for hot galvanizing and method thereof.
Background technology
Galvanizing is to improve one of weather-resistant important means in steel piece surface, and it first carries out pretreatment by steel piece surface, then immerses in the zinc liquid of melting, forms one deck zinc metal coating coating on steel piece surface.One important process operation of galvanizing pre-treatment when solvent is processed, it not only can make up the deficiency that several procedures may exist above, can also activate steel surface, improves quality of coating, and this is unexistent in other steel anti-corrosive techniques.The most often adopt now to help plating solvent be zinc chloride (ZnCl
2) and ammonium chloride (NH
4cl) mixed solution.With between the iron and steel of zinc chloride ammonium salt film, when galvanizing by dipping, often produce larger flue dust, affect the operating environment of factory.This is because the ammonium chloride (NH in salt film
4cl) decomposition temperature is low, far below 450 ℃ of conventional galvanizing temperature.Ammonium chloride (NH
4cl) decomposes can form ammonia (NH
3) and hydrogen chloride (HCl), these two kinds of gases can be combined into again micron order or nanoscale crystal grain above zinc bath.Therefore main component is ammonium chloride (NH in flue gas
4and be attended by ammonia (NH Cl),
3), hydrogen chloride (HCl) and zinc oxide (ZnO), flue gas is white in color; If have in zinc liquid in the situation of aluminium, also has the aluminium chloride (AlCl of cyan
3) flue gas.These gases do not have too large harm to human body, but in the long-term environment in larger flue gas, to human body, will produce harmful effect yet.
For the flue dust producing in hot galvanizing process, most domestic enterprise does not take appropriate measures and processes.Er American-European countries, has generally adopted the mode of flue dust collecting filtration treatment, and produced flue dust is processed after extract system is collected in filter again.At present, conventional gathering system has three classes: (1) side exhausting system.Along zinc pot length direction, a slit-shaped suction opeing is respectively set, the flue dust that galvanizing produces extracts by these two slits.The flue dust temperature producing due to galvanizing is high, and the rate of climb is very fast, therefore will collect preferably galvanized soot, must have larger draft.The advantage of side exhausting system is: less demanding, easy to operate to workpiece hanging; Collection efficiency is generally in 75% left and right; But this method Air Quantity Required is large, and power of motor is high; The treating capacity of follow-up purification apparatus is large; Zinc pot surface radiating is faster, is subject to the impact of workshop wind speed larger; Steel pole, steel pipe and similar tubular workpiece, because flue dust can be emerged ease to zinc pot two ends in managing, can exceed the capture range of system; In gathering system pipeline, can gather dust, need regularly process; Need more pipe-line system and accessory thereof etc.(2) mobile cover gathering system.Whole collection cover body is arranged on a crane, and can move with crane.Cover body divides two parts, and top is fixing to be connected with crane, and bottom can move up and down.When workpiece is zinc-plated, bottom cover body moves down zinc pot top is covered completely, and the flue dust of generation is collected to extract out and processes in cover body.When workpiece soaks after zinc certain hour, on the cover body of bottom, move, reserve zinc pot top certain position, to facilitate zinc-plated workman to take off the operations such as zinc gray.The advantage of mobile cover gathering system is: higher collection efficiency, can reach 95%; Air Quantity Required is half of side exhausting system, and power of motor is little; The treating capacity of follow-up purification apparatus is little; Collection conduit system is simple; The danger that can avoid quick-fried zinc to bring to operator, but its shortcoming be because whole cover body weight is all on crane, weight that crane bears is needed larger, need the crane that tonnage is higher; Zinc-plated inconvenient operation, the operating time is longer; Seal between each parts needs time-based maintenance; Owing to fixed cover will being installed on crane, zinc-plated region height need increase by 2～3 meters.(3) fixed cover gathering system.A large steel construction cover body is installed on zinc pot, and workpiece enters one section of the cover body from along zinc pot length direction, from the other end out.Workpiece enters and carries out after cover body when zinc-plated, and the Men Jun of cover body both sides closes, to extract the flue dust of zinc-plated generation.The advantage of fixed cover gathering system is: surpass 95% collection efficiency; Do not need to carry out the motion of large amount of complex, only need the movement of door and window; All weight is all on ground, and crane does not need to bear cover body weight; To zinc-plated workman, provide good protection; The treating capacity of Air Quantity Required and follow-up purification apparatus is little, and pipe-line system is simple etc., but its shortcoming is to drag for slag difficulty; Zinc-plated operation inconvenience; Workshop is unsighted etc.
The flue dust that galvanizing produces, after gathering system is collected, adopts cloth-bag type filtration system again flue dust to be carried out to filtration treatment conventionally.Bag-type dust equipment manufacturing cost is high, and floor space is large, and the import of bag-type dust equipment also needs heating, drying etc.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of curtain-type soot treatment and purification system for hot galvanizing and method thereof, can fully collect and purify absorption galvanized soot, greatly improve zinc-plated operating environment, the flue gas of discharge reaches GB16297-96 atmosphere pollution comprehensive discharge mark Huaihe River.
The technical solution adopted for the present invention to solve the technical problems is: a kind of curtain-type soot treatment and purification system for hot galvanizing is provided, comprise galvanized soot gathering-device and galvanized soot purifier, described galvanized soot gathering-device comprises curtain system, support system, transmission system and air draft pipeline system, described galvanized soot purifier comprises purification treatment tower and centrifugal blower, and zinc pot is arranged with described curtain system outward; Zinc pot top is provided with described support system; Described support system is provided with described transmission system; Described transmission system is connected with described curtain system, for the curtain system described in lifting; Described support system upper end is provided with air draft pipeline system; Described air draft pipeline system is connected with described purification treatment tower bottom; Described purification treatment tower top is connected with described centrifugal blower.
The curtain system bottom of described curtain-type soot treatment and purification system for hot galvanizing is provided with the framework that square steel tube is welded; Described curtain system is at least divided into two sections, section with section between by stainless steel square tube, be connected.
The curtain system of described curtain-type soot treatment and purification system for hot galvanizing adopts refractory glass fibre to weave cotton cloth and makes.
During the curtain system inoperative of described curtain-type soot treatment and purification system for hot galvanizing in packing up folded state and higher than zinc-plated driving.
The support system lower end of described curtain-type soot treatment and purification system for hot galvanizing is provided with slippage guide rail.
The curtain system of described curtain-type soot treatment and purification system for hot galvanizing is controlled by the computer controlled automatic location and the safe-guard system that are arranged in described support system.
The purification treatment tower of described curtain-type soot treatment and purification system for hot galvanizing adopts at least secondary spray to add at least two layers of filling-material structure.
The technical solution adopted for the present invention to solve the technical problems is: a kind of curtain-type soot treatment and purification method for galvanizing is also provided, comprises the following steps:
(1) zinc-plated driving marches to zinc pot top, when unplated piece is immersed to zinc bath, triggers the photoelectric control switch of computer controlled automatic location and safe-guard system, makes to decline rapidly higher than the curtain of zinc-plated driving, forms petticoat pipe;
(2) utilize the peripheral petticoat pipe forming of zinc pot to reduce distributing of galvanized soot, centrifugal blower carries out exhausting automatically, by galvanized soot suction main air draft, and enters in purification treatment tower by pipeline;
(3) galvanized soot enters after purification treatment tower, processes ammonium chloride, ammonia, hydrogen chloride and the zinc oxide filtering in galvanized soot through spray, and by the solid particle in filling adsorption galvanized soot;
(4) galvanized soot having purified is discharged in atmospheric environment, and reclaims spray cleaning water;
(5) after zinc-plated end, make rapidly curtain rising return, subsequent treatment operation is taken out plating piece move in zinc-plated driving.
Beneficial effect
Owing to having adopted above-mentioned technical scheme, the present invention compared with prior art, has following advantage and good effect:
At zinc pot, be provided with curtain system around, and on the ceiling hold of the support system above zinc pot, be provided with the zinc-plated flue gas of air draft pipeline systematic collection, by blocking of curtain, reduced the dissipation of galvanized soot, collection efficiency is more than 95%, suitable with the collection efficiency of mobile cover gathering system and fixed cover gathering system; Curtain system is divided into multistage, between section and section, by stainless steel square tube, is connected, and neither affects the folding of curtain, has improved again the intensity of curtain, has reduced the impact of wind-force on it, folds the shared volume of curtain and is far smaller than fixed cover and mobile cover; Curtain system adopts refractory glass fibre to weave cotton cloth and makes, and can stand for a long time splashing and corroding of zinc liquid and zinc fume, and lightweight, required driving motor power is little; Curtain system translational speed is fast, during inoperative, in packing up folded state and higher than zinc-plated driving, does not affect conventional zinc-plated operation; Curtain system has adopted PIC computer controlled automatic location and safe-guard system, can guarantee that galvanized soot gathering-device operates reliable and securely.
The galvanized soot of collecting, by the purification treatment tower with multiple filling layers, absorbs the ammonium chloride (NH in zinc-plated flue gas with the reverse filtration of spray-absorption liquid
4and ammonia (NH Cl),
3), hydrogen chloride (HCl) and zinc oxide (ZnO); reduce the pollution of galvanized soot to environment, protected environment, and absorbed the absorption liquid after galvanized soot and contain galvanizing pre-treatment and help plating to process required active ingredient; can reuse prepare quickening liquid, without discharging of waste liquid.
The present invention is simple in structure, makes with easy to maintenance, and area occupied is few, to the recovery of zinc-plated flue gas and good purification, remarkable to economic benefit, society and environmental benefit.
Accompanying drawing explanation
Fig. 1 is curtain-type soot treatment and purification system for hot galvanizing structural representation of the present invention.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiments of the present invention relate to a kind of curtain-type soot treatment and purification system for hot galvanizing, as shown in Figure 1, comprise galvanized soot gathering-device and galvanized soot purifier, described galvanized soot gathering-device comprises curtain system 2, support system 7, transmission system 3 and air draft pipeline system 4, described galvanized soot purifier comprises purification treatment tower 5 and centrifugal blower 6, outside zinc pot 1, be arranged with described curtain system 2, adopt curtain system 2 can effectively collect galvanized soot, avoid it to escape, improve plant working environment; Zinc pot 1 top is provided with described support system 7; The ceiling hold of described support system 7 is provided with transmission system 3; Described transmission system 3 is connected with described curtain system 2, curtain system 2 relies on transmission system 3 to control cable drum and pulley automatic lifting curtain system 2, when curtain system 2 rises to top, the bottom of curtain system 2, higher than the height of the zinc-plated driving in workshop, guarantees not affect zinc-plated normal work; The ceiling hold of described support system 7 is provided with air draft pipeline system 4, described air draft pipeline system 4 is comprised of at least one main air draft and Duo Gen branch road exhaust column, the caliber of main air draft can arrange according to the size of air quantity, main air draft bottom surface arranges many branch road exhaust columns, can realize the flue dust of the zinc-plated generation of even collection, for example, can adopt 2 main air drafts side by side and the bottom surface of each root main air draft to be uniformly distributed 8-12 branch road exhaust column as air draft pipeline system 4; Described air draft pipeline system 4 is connected with described purification treatment tower 5 bottoms; Described purification treatment tower 5 tops are connected with described centrifugal blower 6.
Curtain system 2 bottoms of described curtain-type soot treatment and purification system for hot galvanizing are provided with the framework that square steel tube is welded, and can avoid curtain system 2 rocking when oscilaltion, also can alleviate the impact of wind-force on curtain system 2 when zinc-plated; Described curtain system 2 is divided into multistage (as being divided into 2-3 section), section with section between by stainless steel square tube, be connected.
Described curtain system 2 adopts the computer controlled automatic location and the safe-guard system 8 that are arranged in support system 7 to control, and wherein, computer controlled automatic location and safe-guard system 8 can adopt PIC computer controlled automatic location and safe-guard system.When zinc-plated driving enters curtain system 2 workspace, by the optoelectronic switch of computer controlled automatic location and safe-guard system 8, control and automatically send signal, after computer controlled automatic location and safe-guard system 8 receive signals, provide response, only have the zinc-plated driving just can effectively start decline button when correct stop.After curtain system 2 starts, the motion that computer controlled automatic location and safe-guard system 8 can real-time online control curtain system 2 upper and lower, left and right.When if curtain system 2 declines, when having people's process or having barrier, computer controlled automatic location and safe-guard system 8 are responded to automatically, and curtain system 2 stops declining, and same alarm just can decline after eliminating is abnormal automatically.
Described galvanizing is weaved cotton cloth and is made with the curtain system 2 employing refractory glass fibres of curtain-type soot treatment and purification device, because the temperature of galvanized soot has 200 degree left and right, and galvanized workpiece dries the danger that also has quick-fried zinc when incomplete, the curtain that therefore need to adopt refractory glass fibre to weave cotton cloth to make is to guarantee operator's safety.
Described galvanizing is provided with slippage guide rail 9 with the column support lower end of the support system 7 of curtain-type soot treatment and purification device, when described curtain system 2 drops to a half, the square steel tube framework of curtain system 2 bottoms enters described slippage guide rail 9, makes curtain system 2 form firmly enclosure wall.
Described galvanizing is provided with multi-stage spray and multiple filling layers with the purification treatment tower 5 of curtain-type soot treatment and purification device, in tower, zinc-plated flue gas contacts with spray-absorption liquid is reverse, and galvanized soot has been carried out to repeatedly spray to be processed, strengthen assimilation effect, the galvanized soot of processing through spray, finally by crossing multiple filling layers, filters out the solid particle in galvanized soot.Wherein, the number of times of spray and the number of plies of filler can according to galvanized soot number arrange, for example purification treatment tower adopts secondary spray to add two layers of filling-material structure as shown in Figure 1.Absorbed spray-absorption liquid after galvanized soot and contained galvanizing pre-treatment and help plating to process required active ingredient, can reuse preparation quickening liquid, without discharging of waste liquid.
Embodiments of the present invention also relate to a kind of curtain-type soot treatment and purification method for galvanizing, comprise the following steps: (1) zinc-plated driving marches to zinc pot top, when unplated piece is immersed to zinc bath, trigger the photoelectric control switch of computer controlled automatic location and safe-guard system, make to decline rapidly higher than the curtain of zinc-plated driving, form petticoat pipe; (2) utilize the peripheral petticoat pipe forming of zinc pot to reduce distributing of galvanized soot, centrifugal blower carries out exhausting automatically, by galvanized soot suction main air draft, and enters in purification treatment tower by pipeline; (3) galvanized soot enters after purification treatment tower, processes ammonium chloride, ammonia, hydrogen chloride and the zinc oxide filtering in galvanized soot through spray, and by the solid particle in filling adsorption galvanized soot; (4) galvanized soot having purified is discharged in atmospheric environment, and reclaims spray cleaning water; (5) after zinc-plated end, make rapidly curtain rising return, subsequent treatment operation is taken out plating piece move in zinc-plated driving.
Be not difficult to find, at zinc pot, be provided with curtain system around, and on the ceiling hold of the support system above zinc pot, be provided with the zinc-plated flue gas of air draft pipeline systematic collection, by blocking of curtain, reduced the dissipation of galvanized soot, collection efficiency is more than 95%, suitable with the collection efficiency of mobile cover gathering system and fixed cover gathering system; Curtain system is divided into multistage, between section and section, by stainless steel square tube, is connected, and neither affects the folding of curtain, has improved again the intensity of curtain, has reduced the impact of wind-force on it, folds the shared volume of curtain and is far smaller than fixed cover and mobile cover; Curtain system adopts refractory glass fibre to weave cotton cloth and makes, and can stand for a long time splashing and corroding of zinc liquid and zinc fume, and lightweight, required driving motor power is little; Curtain system translational speed is fast, during inoperative, in packing up folded state and higher than zinc-plated driving, does not affect conventional zinc-plated operation; Curtain system has adopted PIC computer controlled automatic location and safe-guard system, can guarantee that galvanized soot gathering-device operates reliable and securely.
The galvanized soot of collecting, by the purification treatment tower with multiple filling layers, absorbs the ammonium chloride (NH in zinc-plated flue gas with the reverse filtration of spray-absorption liquid
4and ammonia (NH Cl),
3), hydrogen chloride (HCl) and zinc oxide (ZnO); reduce the pollution of galvanized soot to environment, protected environment, and absorbed the absorption liquid after galvanized soot and contain galvanizing pre-treatment and help plating to process required active ingredient; can reuse prepare quickening liquid, without discharging of waste liquid.
The present invention is simple in structure, makes with easy to maintenance, and area occupied is few, to the recovery of zinc-plated flue gas and good purification, remarkable to economic benefit, society and environmental benefit.
Claims (1)
1. the using method of a curtain-type soot treatment and purification system for hot galvanizing, it is characterized in that, described system comprises galvanized soot gathering-device and galvanized soot purifier, described galvanized soot gathering-device comprises curtain system (2), support system (7), transmission system (3) and air draft pipeline system (4), described galvanized soot purifier comprises purification treatment tower (5) and centrifugal blower (6), it is characterized in that, outside zinc pot (1), be arranged with described curtain system (2), zinc pot (1) top is provided with described support system (7), described support system (7) is provided with described transmission system (3), described transmission system (3) is connected with described curtain system (2), for the curtain system described in lifting (2), described support system (7) upper end is provided with air draft pipeline system (4), described air draft pipeline system (4) is connected with described purification treatment tower (5) bottom, described purification treatment tower (5) top is connected with described centrifugal blower (6), and described curtain system (2) bottom is provided with the framework that square steel tube is welded, described curtain system (2) is at least divided into two sections, section with section between by stainless steel square tube, be connected, described curtain system (2) adopts refractory glass fibre to weave cotton cloth and makes, during described curtain system (2) inoperative in packing up folded state and higher than zinc-plated driving, described support system (7) lower end is provided with slippage guide rail (9), described curtain system (2) is controlled by the computer controlled automatic location and the safe-guard system (8) that are arranged in described support system (7), described purification treatment tower (5) adopts at least secondary spray to add at least two layers of filling-material structure, comprise the following steps:
(1) zinc-plated driving marches to zinc pot top, when unplated piece is immersed to zinc bath, triggers the photoelectric control switch of the automatic location of computer and safe-guard system, makes to decline rapidly higher than the curtain of zinc-plated driving, forms petticoat pipe;
(2) utilize the peripheral petticoat pipe forming of zinc pot to reduce distributing of galvanized soot, centrifugal blower carries out exhausting automatically, by galvanized soot suction main air draft, and enters in purification treatment tower by pipeline;
(3) galvanized soot enters after purification treatment tower, processes ammonium chloride, ammonia, hydrogen chloride and the zinc oxide filtering in galvanized soot through spray, and by the solid particle in filling adsorption galvanized soot;
(4) galvanized soot having purified is discharged in atmospheric environment, and reclaims spray cleaning water;
(5) after zinc-plated end, make rapidly curtain rising return, subsequent treatment operation is taken out plating piece move in zinc-plated driving.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010122408.8A CN101797570B (en) | 2010-03-11 | 2010-03-11 | Curtain-type soot treatment and purification system for hot galvanizing and method thereof |
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|---|---|---|---|
| CN201010122408.8A CN101797570B (en) | 2010-03-11 | 2010-03-11 | Curtain-type soot treatment and purification system for hot galvanizing and method thereof |
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| CN101797570B true CN101797570B (en) | 2014-12-03 |
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| CN110935706B (en) * | 2019-11-27 | 2021-05-14 | 浙江盛达铁塔有限公司 | Dust removal petticoat pipe mounting structure |
| CN112170428B (en) * | 2020-09-17 | 2021-09-21 | 余姚市永林机械科技有限公司 | Curtain formula smoke and dust processing system for hot-galvanize |
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| CN101797570A (en) | 2010-08-11 |
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