CN109722616A - Hot galvanizing air knife nitrogen feeder and its application method - Google Patents
Hot galvanizing air knife nitrogen feeder and its application method Download PDFInfo
- Publication number
- CN109722616A CN109722616A CN201711047955.2A CN201711047955A CN109722616A CN 109722616 A CN109722616 A CN 109722616A CN 201711047955 A CN201711047955 A CN 201711047955A CN 109722616 A CN109722616 A CN 109722616A
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- Prior art keywords
- nitrogen
- butterfly valve
- valve
- storage tank
- appendix
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 222
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 111
- 238000005246 galvanizing Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000003860 storage Methods 0.000 claims abstract description 65
- 239000007789 gas Substances 0.000 claims abstract description 34
- 230000006837 decompression Effects 0.000 claims abstract description 11
- 238000013022 venting Methods 0.000 claims abstract description 10
- 238000010926 purge Methods 0.000 claims abstract description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 35
- 229910052725 zinc Inorganic materials 0.000 claims description 35
- 239000011701 zinc Substances 0.000 claims description 35
- 239000007788 liquid Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
The present invention relates to the removing apparatus field of excess molten layer on elongated shaped materials, specially a kind of hot galvanizing air knife nitrogen feeder and its application method.A kind of hot galvanizing air knife nitrogen feeder, including blower (16) and air knife (17), it is characterized in that: further including Nitrogen source gases (1), electric butterfly valve (2), decompression venting valve (3), pressure gauge (4), preceding pressure transmitter (5), relief valve (6), shut-off valve (8), pressure transmitter (11) afterwards, switch electric butterfly valve first (12), switch Hand-operated butterfly valve first (13), switch Hand-operated butterfly valve second (14), switch electric butterfly valve second (15), first nitrogen storage tank (18), second nitrogen storage tank (19) and atmospheric outlet (20).A kind of application method of hot galvanizing air knife nitrogen feeder, it is characterized in that: step is implemented as described below: a. gas supply；B. it purges；C. it balances.Quality of coating of the present invention is high, high production efficiency.
Description
Technical field
The present invention relates to the removing apparatus field of excess molten layer on elongated shaped materials, specially a kind of hot galvanizing air knife nitrogen
Gas feeder and its application method.
Background technique
In order to reduce the corrosion of steel material, people use a variety of anti-corrosion methods, protect wherein coating on steel surface
The method of sheath is using a kind of most common method.It since zinc has good corrosion resistance in an atmosphere, and is a kind of again
Comparatively cheap metal, it is relatively low with zinc layers protection steel product cost, which also promotes hot galvanizing industrial expansion, become using most
Extensive metal rust preventing method.
Hot-dip galvanized steel strip enters the zinc pot of melting after coming out from annealing furnace, zinc liquid is hung up on strip, in order to automatically control
The thickness of zinc coat is wiped zinc liquid extra on zinc pot outlet strip and is mostly used at present to control the coating layer thickness of galvanized sheet
The method of air knife purging.So-called " air knife " is the principle according to fluid impact, and the seam of entire strip width is traversed using one
Shape nozzle sprays the continuously flat air-flow as knife, and wiping extra zinc off from strip, thickness is correct, coating is equal to obtain
Even zinc coating.
Currently, the air knife that hot galvanizing is used mainly uses compressed air as gas source, supplied using blower, in use process,
Since high temperature zinc liquid not yet condenses, zinc layers oxidative phenomena can be generated when zinc liquid passes through air knife, and the zinc coat of strip is caused to spend
Line influences the beauty of zinc coat, appliance plate, Automobile Plate especially to modern high-quality, the direct shadow of the appearance of zinc coat
Ring the classification and price for arriving product；In addition, air air knife can make zinc liquid surface generate a large amount of zinc oxide slag at work,
These cadmias one increase the consumption of zinc, and two can also make strip generate cadmia defect.
Summary of the invention
In order to overcome the drawbacks of the prior art, provide a kind of quality of coating is high, cadmia generates less, high production efficiency it is zinc-plated
Equipment, the invention discloses a kind of hot galvanizing air knife nitrogen feeder and its application methods.
The present invention reaches goal of the invention by following technical solution:
The outlet side of a kind of hot galvanizing air knife nitrogen feeder, including blower and air knife, blower passes through switching electricity of having connected
Dynamic butterfly valve second connects the inlet end of air knife with the appendix for switching Hand-operated butterfly valve second, it is characterized in that: further including Nitrogen source gases, electronic
Butterfly valve, decompression venting valve, pressure gauge, preceding pressure transmitter, relief valve, relief valve, shut-off valve, shut-off valve, relief valve, rear pressure
Transmitter, switching electric butterfly valve first, switching Hand-operated butterfly valve first, switching Hand-operated butterfly valve second, switching electric butterfly valve second, the first nitrogen storage
Tank, the second nitrogen storage tank and atmospheric outlet,
The outlet side of Nitrogen source gases connects the inlet end of the first appendix, and electric butterfly valve, decompression are sequentially connected in series on the first appendix
Pressure maintaining valve, pressure gauge and preceding pressure transmitter, the appendix that the outlet side of the first appendix passes through shut-off valve of having connected respectively connect
It connects the inlet end of the first nitrogen storage tank, connect the inlet end of the second nitrogen storage tank by appendix,
The outlet side of first nitrogen storage tank connects the inlet end of the second appendix, is sequentially connected in series rear pressure inverting on the second appendix
Device switches electric butterfly valve first and switching Hand-operated butterfly valve first, the inlet end of the outlet side connection air knife on the second appendix,
First balance end of the first nitrogen storage tank connects the inlet end of the second nitrogen storage tank by appendix, the first nitrogen storage tank
Second balance end connects the inlet end of balance pipe, and relief valve of connecting on balance pipe, it is defeated that the outlet side of balance pipe is separately connected first
The outlet side of tracheae connects atmospheric outlet by the appendix for relief valve of having connected, is connected by the appendix for relief valve of having connected
The first balance end of the second nitrogen storage tank is connect,
The outlet side of second nitrogen storage tank connects the inlet end of the second appendix by appendix, and the second of the second nitrogen storage tank is flat
The appendix that weighing apparatus end passes through shut-off valve of having connected connects atmospheric outlet.
The hot galvanizing air knife nitrogen feeder, it is characterized in that:
The nitrogen pressure of Nitrogen source gases output is not less than 0.8MPa, the volume of both the first nitrogen storage tank and second nitrogen storage tank
It is all 40m3, the output pressure of air knife is 20mbar~50mbar.
The application method of the hot galvanizing air knife nitrogen feeder, it is characterized in that: step is implemented as described below:
A. supply: Nitrogen source gases input nitrogen, the first nitrogen storage tank and the second nitrogen to the first nitrogen storage tank and the second nitrogen storage tank
For gas storage tank jointly to air knife the supply of nitrogen, blower supplies air to air knife, passes through switching electric butterfly valve first, switching Hand-operated butterfly valve
First, switching electric butterfly valve second and the gas source for opening and closing switching supply air knife for switching Hand-operated butterfly valve second, when electric butterfly valve first
With switching Hand-operated butterfly valve first be switched on and electric butterfly valve second and switching Hand-operated butterfly valve second all close when, the gas source of air knife is nitrogen,
When electric butterfly valve first and switching Hand-operated butterfly valve first are all closed and electric butterfly valve second and switching Hand-operated butterfly valve second are switched on, air knife
Gas source is air；
B. purge: zinc coat of the air knife on zinc pot outlet strip implements purging, blows away zinc extra on zinc pot outlet strip
Liquid, to control the galvanized layer thickness of galvanized sheet；
C. it balances: when step a, the first appendix and the being monitored in real time by preceding pressure transmitter and rear pressure transmitter respectively
The air pressure of one appendix, the stable gas pressure of the first appendix and the first appendix is kept by decompression venting valve, and current pressure becomes
The air pressure for sending device and rear pressure transmitter to measure exceed setting value when, relief valve and relief valve are switched on, the first nitrogen storage tank and
Second nitrogen storage tank is released nitrogen outward by atmospheric outlet.
The present invention by by the pressure reduction of high pressure (0.8MPa) to be suitble to air knife use air pressure (20mbar~
50mbar) and control accuracy requirement ± 9mbar, specifically, decompression venting valve, the preceding pressure transmitter fed back by using band
The pressure-reduced and-regulated processing mode combined with control elements such as rear pressure transmitters with the first nitrogen storage tank and the second nitrogen storage tank
It is the needs of come when meeting air knife work, simple and reliable for structure；
The case where present invention is for nitrogen air knife low pressure, low fluctuation and big flow (8,000m3/hour), design has in main line
With relief valve of all connecting on nitrogen storage tank, when air pressure is more than relief valve design pressure, it is contemplated that a large amount of nitrogen cannot be direct
It is discharged into workshop, nitrogen can pass through the atmospheric outlet (20) specially designed by relief valve and pipeline and be discharged into atmosphere.
Nitrogen storage tank uses two volumes for 40m3Storage tank, which is to be suitble to air knife operating air pressure, under flow condition
The best pressure stabilization function that can be obtained, there are two manually shut-off valves for nitrogen storage tank band, for emptying nitrogen, the nitrogen of discharge
The same atmospheric outlet by specially designing is passed through atmosphere.
The present invention can fully meet live big flow, low-pressure, extremely low fluctuation nitrogen air knife use condition, to hot dip
The raising of zinc strip surface quality and the raising of production efficiency have obvious effect.With great social benefit and economic effect
Benefit.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the scheme of installation when present invention uses.
Specific embodiment
The present invention is further illustrated below by way of specific embodiment.
Embodiment 1
A kind of hot galvanizing air knife nitrogen feeder, including Nitrogen source gases 1, electric butterfly valve 2, decompression venting valve 3, pressure gauge 4,
Preceding pressure transmitter 5, relief valve 6, relief valve 6, shut-off valve 8, shut-off valve 8, relief valve 6, rear pressure transmitter 11, switching are electronic
Butterfly valve first 12, switching Hand-operated butterfly valve first 13, switching Hand-operated butterfly valve second 14, switching electric butterfly valve second 15, blower 16, air knife 17, the
One nitrogen storage tank 18, the second nitrogen storage tank 19 and atmospheric outlet 20, as shown in Figure 1, specific structure is:
The outlet side of blower 16 passes through switching electric butterfly valve second 15 of having connected and connects gas with the appendix for switching Hand-operated butterfly valve second 14
The inlet end of knife 17；
The outlet side of Nitrogen source gases 1 connects the inlet end of the first appendix 21, is sequentially connected in series electric butterfly valve on the first appendix 21
2, the outlet side of decompression venting valve 3, pressure gauge 4 and preceding pressure transmitter 5, the first appendix 21 passes through shut-off valve of having connected respectively
8 appendix connects the inlet end of the first nitrogen storage tank 18, connects the inlet end of the second nitrogen storage tank 19 by appendix,
The outlet side of first nitrogen storage tank 18 connects the inlet end of the second appendix 22, presses after being sequentially connected in series on the second appendix 22
Power transmitter 11 switches electric butterfly valve first 12 and switching Hand-operated butterfly valve first 13, and the outlet side on the second appendix 22 connects air knife
17 inlet end,
First balance end of the first nitrogen storage tank 18 connects the inlet end of the second nitrogen storage tank 19, the first nitrogen storage by appendix
Second balance end of tank 18 connects the inlet end of balance pipe 23, relief valve 6 of connecting on balance pipe 23, the outlet side point of balance pipe 23
The outlet side of the first appendix 21 is not connected, atmospheric outlet 20 is connected, by series connection by the appendix for relief valve 6 of having connected
The appendix of relief valve 6 connects the first balance end of the second nitrogen storage tank 19,
The outlet side of second nitrogen storage tank 19 connects the inlet end of the second appendix 22 by appendix, the second nitrogen storage tank 19
The appendix that second balance end passes through shut-off valve 8 of having connected connects atmospheric outlet 20.
In the present embodiment:
The nitrogen pressure that Nitrogen source gases 1 export is not less than 0.8MPa, both the first nitrogen storage tank 18 and the second nitrogen storage tank 19
Volume be all 40m3, the output pressure of air knife 17 is 20mbar~50mbar.
The present embodiment is in use, step is implemented as described below:
A. it supplies: as shown in Figure 2: so that the purging face face zinc pot 31 of air knife 17 is exported the zinc coat on strip, contained in zinc pot 31
It puts zinc liquid, is equipped with stabilizing roller 32, corrector roll 33 and sinking roller 34 in zinc pot 31, Nitrogen source gases 1 are to the first nitrogen storage tank 18 and the
Two nitrogen storage tanks 19 input nitrogen, and the first nitrogen storage tank 18 and the second nitrogen storage tank 19 are jointly to 17 the supply of nitrogen of air knife, blower
16 supply air to air knife 17, by switching electric butterfly valve first 12, switching Hand-operated butterfly valve first 13, switching electric butterfly valve second 15 and cut
The gas source for changing the opening and closing switching supply air knife 17 of Hand-operated butterfly valve second 14, when electric butterfly valve first 12 and switching Hand-operated butterfly valve first
13 are switched on and electric butterfly valve second 15 and switching Hand-operated butterfly valve second 14 when all closing, and the gas source of air knife 17 is nitrogen, when electronic butterfly
Valve first 12 and switching Hand-operated butterfly valve first 13 are all closed and electric butterfly valve second 15 and switching Hand-operated butterfly valve second 14 when being switched on, air knife 17
Gas source be air；
B. purge: zinc coat of the air knife 17 on zinc pot outlet strip implements purging, blows away zinc extra on zinc pot outlet strip
Liquid, to control the galvanized layer thickness of galvanized sheet；
C. it balances: when step a, the first appendix 21 being monitored in real time by preceding pressure transmitter 5 and rear pressure transmitter 11 respectively
With the air pressure of the first appendix 21, the stable gas pressure of the first appendix 21 and the first appendix 21 is kept by decompression venting valve 3,
When the air pressure that current pressure transmitter 5 and rear pressure transmitter 11 measure exceeds setting value, relief valve 6 and relief valve 6 are switched on,
First nitrogen storage tank 18 and the second nitrogen storage tank 19 are released nitrogen outward by atmospheric outlet 20.
Claims (3)
1. the outlet side of a kind of hot galvanizing air knife nitrogen feeder, including blower (16) and air knife (17), blower (16) is logical
The inlet end that switching electric butterfly valve second (15) of having connected connects air knife (17) with the appendix for switching Hand-operated butterfly valve second (14) is crossed,
Be characterized in: further include Nitrogen source gases (1), electric butterfly valve (2), decompression venting valve (3), pressure gauge (4), preceding pressure transmitter (5),
Relief valve (6), relief valve (6), shut-off valve (8), shut-off valve (8), relief valve (6), rear pressure transmitter (11), the electronic butterfly of switching
Valve first (12), switching Hand-operated butterfly valve first (13), switching Hand-operated butterfly valve second (14), switching electric butterfly valve second (15), the first nitrogen storage
Tank (18), the second nitrogen storage tank (19) and atmospheric outlet (20),
The inlet end of the outlet side connection the first appendix (21) of Nitrogen source gases (1), the first appendix are sequentially connected in series electricity on (21)
Dynamic butterfly valve (2), decompression venting valve (3), pressure gauge (4) and preceding pressure transmitter (5), the outlet side difference of the first appendix (21)
The second nitrogen is connected by the inlet end of the appendix connection the first nitrogen storage tank (18) of shut-off valve of having connected (8), by appendix
The inlet end of gas storage tank (19),
The inlet end of the outlet side connection the second appendix (22) of first nitrogen storage tank (18), the second appendix are successively gone here and there on (22)
Pressure transmitter (11) after connection, switching electric butterfly valve first (12) and switch Hand-operated butterfly valve first (13), on the second appendix (22)
Outlet side connects the inlet end of air knife (17),
Inlet end of first balance end of the first nitrogen storage tank (18) by appendix connection the second nitrogen storage tank (19), the first nitrogen
Second balance end of gas storage tank (18) connects the inlet end of balance pipe (23), connects relief valve (6) on balance pipe (23), balance pipe
(23) outlet side is separately connected the outlet side of the first appendix (21), is connected greatly by the appendix of relief valve of having connected (6)
Gas exports (20), connects first balance end of the second nitrogen storage tank (19) by the appendix of relief valve of having connected (6),
Inlet end of the outlet side of second nitrogen storage tank (19) by appendix connection the second appendix (22), the second nitrogen storage tank
(19) the second balance end passes through appendix connection atmospheric outlet (20) for shut-off valve (8) of having connected.
2. hot galvanizing air knife nitrogen feeder as described in claim 1, it is characterized in that:
The nitrogen pressure of Nitrogen source gases (1) output is not less than 0.8MPa, the first nitrogen storage tank (18) and the second nitrogen storage tank (19)
The volume of the two is all 40m3, the output pressure of air knife (17) is 20mbar~50mbar.
3. the application method of hot galvanizing air knife nitrogen feeder as claimed in claim 1 or 2, it is characterized in that: by as follows
The step is implemented:
1. gas supply: Nitrogen source gases (1) input nitrogen, the first nitrogen storage to the first nitrogen storage tank (18) and the second nitrogen storage tank (19)
Jointly to air knife (17) the supply of nitrogen, blower (16) supplies air to air knife (17), leads to for tank (18) and the second nitrogen storage tank (19)
Cross switching electric butterfly valve first (12), switching Hand-operated butterfly valve first (13), switching electric butterfly valve second (15) and switching Hand-operated butterfly valve second
(14) gas source of opening and closing switching supply air knife (17) when electric butterfly valve first (12) and switches Hand-operated butterfly valve first (13) all
It opens and electric butterfly valve second (15) and switching Hand-operated butterfly valve second (14) when all closing, the gas source of air knife (17) is nitrogen, when electronic
Butterfly valve first (12) and switching Hand-operated butterfly valve first (13) are all closed and electric butterfly valve second (15) and switching Hand-operated butterfly valve second (14) are all opened
Qi Shi, the gas source of air knife (17) are air；
2. purging: zinc coat of the air knife (17) on zinc pot outlet strip implements purging, and it is extra on zinc pot outlet strip to blow away
Zinc liquid, to control the galvanized layer thickness of galvanized sheet；
3. balance: step 1. when, the first gas transmission is monitored in real time by preceding pressure transmitter (5) and rear pressure transmitter (11) respectively
The air pressure for managing (21) and the first appendix (21) keeps the first appendix (21) and the first appendix by decompression venting valve (3)
(21) when the air pressure that stable gas pressure, current pressure transmitter (5) and rear pressure transmitter (11) measure exceeds setting value, pressure release
Valve (6) and relief valve (6) are switched on, and the first nitrogen storage tank (18) and the second nitrogen storage tank (19) are outside by atmospheric outlet (20)
It releases nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711047955.2A CN109722616A (en) | 2017-10-31 | 2017-10-31 | Hot galvanizing air knife nitrogen feeder and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711047955.2A CN109722616A (en) | 2017-10-31 | 2017-10-31 | Hot galvanizing air knife nitrogen feeder and its application method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109722616A true CN109722616A (en) | 2019-05-07 |
Family
ID=66293957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711047955.2A Pending CN109722616A (en) | 2017-10-31 | 2017-10-31 | Hot galvanizing air knife nitrogen feeder and its application method |
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