CN210657099U - Cooling device for hot-dip galvanized strip steel plated with external electrostatic field - Google Patents
Cooling device for hot-dip galvanized strip steel plated with external electrostatic field Download PDFInfo
- Publication number
- CN210657099U CN210657099U CN201920937068.0U CN201920937068U CN210657099U CN 210657099 U CN210657099 U CN 210657099U CN 201920937068 U CN201920937068 U CN 201920937068U CN 210657099 U CN210657099 U CN 210657099U
- Authority
- CN
- China
- Prior art keywords
- strip steel
- liquid
- hot
- electrostatic field
- supply device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Coating With Molten Metal (AREA)
Abstract
The utility model relates to a cooling device after hot galvanizing strip steel of plus electrostatic field plates belongs to metallurgical engineering technical field, has solved in the current spray cooling heat dissipation that liquid droplet is difficult to reach the cladding material surface and carries out the contact heat transfer with cladding material, and the radiating effect is poor, the poor problem of product quality. The cooling device for the hot-dip galvanized strip steel with the external electrostatic field after plating comprises a spraying device, a high-voltage device, a liquid supply device and an air supply device; the spraying device comprises a nozzle used for spraying fog drops to the strip steel, the nozzle is connected with a liquid supply device and a gas supply device, the high-voltage device is used for electrifying the fog drops generated by the spraying device, the liquid supply device is used for supplying liquid capable of generating the fog drops to the spraying device, and the gas supply device is used for supplying gas for converting the liquid into the fog drops to the spraying device. The utility model discloses a contact heat transfer on electrified droplet and cladding material surface has improved cooling rate by a wide margin, has improved the corrosion resisting property of cladding material quality and belted steel.
Description
Technical Field
The utility model relates to a metallurgical engineering technical field especially relates to a cooling device after hot dip galvanizing strip steel of plus electrostatic field plates.
Background
Hot dip galvanizing is a method of dipping a steel material into a molten zinc solution to form a metal coating on the surface thereof, and is the most common technique for preventing corrosion of steel. In order to control the size of spangles and improve the binding force and the corrosion resistance of a coating, the strip steel needs to be rapidly cooled after being taken out of a zinc pot so as to ensure the quality of the coating. At present, the strip steel is cooled by adopting an air cooling mode, and the air heat capacity is small, the heat dissipation capacity is limited, the cooling speed is low, crystal grains are easy to excessively grow in the zinc solidification process, and the quality of a coating is reduced.
In order to obtain better heat dissipation effect and increase cooling speed, spray cooling heat dissipation of liquid working medium directly contacting with the surface of the coating is gradually tried and applied. The spray cooling heat dissipation is that liquid such as water and the like is atomized into mist drops of dozens to hundreds of microns through an atomizing device such as a nozzle and the like by using external working medium or power and is sprayed to the surface of the strip steel, and the strip steel is rapidly cooled by utilizing the surface evaporation of the mist drops and the convection heat exchange between the mist drops and the surface of a coating. In the actual production process, because the surface temperature of the strip steel is high (about 460 ℃) after the strip steel is taken out of a zinc pot, a hot air layer is formed near a semi-solidified zinc coating, so that liquid fog drops can hardly reach the surface of the coating and contact with the coating for heat exchange.
SUMMERY OF THE UTILITY MODEL
In view of the above analysis, the utility model aims at providing a cooling device after hot dip galvanizing strip steel of plus electrostatic field for solve in the current spray cooling heat dissipation liquid droplet be difficult to reach the cladding material surface and carry out the heat transfer that contacts with the cladding material, the radiating effect is poor, the poor problem of product quality.
The purpose of the utility model is mainly realized through the following technical scheme:
the utility model provides a cooling device after hot galvanizing strip steel plating with an external electrostatic field, which comprises a spraying device, a high voltage device, a liquid supply device and an air supply device; the spraying device comprises a nozzle used for spraying fog drops to the strip steel, the nozzle is connected with the liquid supply device and the gas supply device, the high-voltage device is used for electrifying the strip steel and the fog drops, the liquid supply device is used for supplying liquid capable of generating the fog drops to the spraying device, and the gas supply device is used for supplying gas for converting the liquid into the fog drops to the spraying device; the number of the nozzles is multiple, and the nozzles are symmetrically distributed on two sides of the strip steel; the high-voltage device is characterized in that the number of the electrodes is two, each electrode is located between the strip steel and the spraying device, and the two electrodes are located on two sides of the strip steel respectively.
On the basis of the above scheme, the utility model discloses following improvement has still been made:
furthermore, the nozzles are arranged in a multi-stage and multi-zone mode along the running direction of the strip steel and the width direction of the strip steel, and the nozzles of each stage and each zone are started and stopped independently.
Further, the liquid supply device comprises a liquid storage tank, a liquid level meter, a stirrer, a control valve and a circulating pump; the liquid storage tank is used for storing liquid, the liquid level meter is used for metering the liquid level of the liquid, and the stirrer is used for stirring the liquid; the control valve and the circulating pump are used for controlling the liquid to start and stop circulating.
Further, the liquid supply device also comprises a filter and a heater, wherein the filter is used for filtering impurities in the liquid, and the heater is used for heating the liquid.
Further, the air supply device comprises an air compressor, an air storage tank and a filter, wherein the air storage tank and the filter are used for storing and filtering air.
Further, the cooling device also comprises a drainage device for collecting and draining condensed water generated in the cooling process, wherein the drainage device is positioned below the nozzle and at the lower part of the cooling device.
Further, the drainage device comprises a condensation collection tank, a pump and a valve.
Further, the device also comprises an air purification device used for preventing the fog drops from entering the conductive tube of the high-voltage device, the air purification device is positioned above the nozzle and the upper part of the cooling device, and the air purification device comprises a purification fan and a control valve.
Further, the cooling device also comprises a vapor-fog discharging device used for discharging vapor and non-evaporated vapor drops generated in the cooling process, and the vapor-fog discharging device is positioned above the nozzle and at the upper part of the cooling device.
Further, the vapor-fog discharge device comprises a vapor-fog blower, a circulating pump and a vapor-fog storage tank.
The utility model discloses can realize one of following beneficial effect at least:
(1) the electrostatic field is added to charge the fog drops, and the fog drops penetrate through the hot air layer on the surface of the coating by utilizing the electrostatic attraction and the air pressure, so that the problem that the fog drops of the existing spray cooling device are difficult to contact with the coating after plating is solved. And the surface of the coating has two heat exchange modes of fog drop evaporation and convection heat exchange of fog drops and a zinc layer, so that the heat exchange coefficient is large, and the cooling speed is greatly improved.
(2) The liquid in the liquid supply device forms a large amount of micro liquid drops after atomization, the contact area with the strip steel is large, the heat exchange is uniform, the temperature gradient of the surface of the coating is small, and the quality of the coating is improved.
(3) The steam and the non-evaporated fog drops generated in the cooling process can be discharged by the steam fog discharging device, and the steam and the non-evaporated fog drops generated in the cooling process are prevented from being attached to the surface of the steel plate to influence the cooling effect and the coating quality.
(4) Through setting up air purification device can prevent that the droplet from getting into the contact tube of high voltage device, makes voltage stable, and the cladding material is even, and the quality is stable.
(5) The arrangement of the drainage device can effectively prevent water drops generated by condensation of fog drops adhered on cold surfaces such as a frame, a chamber wall surface and the like from falling into the zinc pot, thereby improving the quality of a coating and the corrosion resistance of strip steel.
(6) The multi-stage multi-area nozzles are respectively arranged along the length direction and the width direction of the galvanized strip steel, and the nozzles in each stage and area can be independently started and stopped, so that the strip steel cooling requirements of different widths and different running speeds can be met.
(7) The utility model discloses a plate back cooling device with plus electrostatic field hot dip galvanizing belted steel and locate the air knife and go upward between the perpendicular air-cooled section, make the zinc layer cool off fast, be favorable to forming more crystal nucleuses and less spangle, improve the corrosion resisting property of cladding material quality and belted steel.
The utility model discloses in, can also make up each other between the above-mentioned each technical scheme to realize more preferred combination scheme. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.
FIG. 1 is a schematic view of a cooling device after hot-dip galvanizing strip steel plating with an external electrostatic field according to an embodiment of the present invention;
FIG. 2 is a schematic view of the arrangement of nozzles along the width direction of the strip steel;
fig. 3 is a schematic diagram of a high voltage device.
Reference numerals:
1-strip steel; 2-a spraying device; 3-tungsten filament; 4-vapor-fog discharge; 5-an air supply device; 6-a liquid supply device; 7-an air purification device; 8-a drainage device; 9-high voltage devices; 10-a nozzle; 11-contact roll.
Detailed Description
The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of the invention, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit the scope of the invention.
Example one
The utility model discloses a concrete embodiment discloses an add cooling device after electrostatic field hot dip galvanizing strip steel plates, as shown in figure 1, including atomizer 2, high voltage device 9, supply liquid device 6, air feeder 5, steam fog eduction gear 4, drainage device 8, air purification device 7 and connecting tube.
The liquid supply device 6 is used for supplying water or ammonium dihydrogen phosphate (NH) to the spraying device 24H2PO4) Solution, the equipment for both solutions is completely differentiated. The liquid supply device 6 comprises a liquid storage tank, a liquid level meter, a filter, a stirrer, a heater, an automatic control valve and a circulating pump. The liquid storage tank is used for storing water or ammonium dihydrogen phosphate (NH)4H2PO4) The liquid level meter is used for measuring the liquid level, the filter is used for filtering impurities in the water, and the stirrer and the heater are respectively used for stirring and heating ammonium dihydrogen phosphate (NH)4H2PO4) A solution to improve the solubility of ammonium dihydrogen phosphate in water. The automatic control valve and the circulating pump are used for controlling the liquid start-stop circulation.
The air supply means 5 is used to supply air at the required pressure and flow rate for the spraying device. The air supply device of the present embodiment includes an air compressor, an air tank, a dryer, and a filter. The air compressor is an oil-free screw compressor and is used for compressing air. The air tank, the dryer and the filter are used to store, dry and filter air, respectively.
The spray device 2 uses the pressure of air to make water or ammonium dihydrogen phosphate (NH)4H2PO4) The solution is atomized into 10-20 μm fog drops. The spraying device 2 of the embodiment is mainly composed of nozzles 10, and the nozzles 10 are respectively arranged along the running direction of the strip steel 1 and vertical to the running direction of the strip steel 1. In order to adapt to the strip steel with different widths, a plurality of nozzles are arranged along the width direction of the strip steel, and are arranged on the strip steelThe nozzles are divided into 3-4 areas, and the nozzles in different areas can be controlled to be started and stopped respectively. In order to adapt to different running speeds of the strip steel, 3-5 layers of nozzles are arranged along the length direction of the strip steel, and the nozzles at different levels can be controlled to be started and stopped respectively.
As shown in figure 2, 19-31 nozzles are arranged at one stage along the width direction of the strip steel. To accommodate strip of different widths, the nozzle is divided into 4 zones as shown, zone 1, zone 2, zone 3 and zone 4. The nozzles of each stage and each zone in fig. 1 and 2 can be independently turned on and off.
In the embodiment, the cooling device is arranged above the air knife and below the ascending vertical air cooling section in a zinc layer solidification crystallization area (the temperature of the surface coating of the strip steel is in the range of 420-320 ℃) to rapidly cool the galvanized strip steel, so that more crystal nuclei and smaller spangles are formed, and the coating quality and the corrosion resistance of the strip steel are improved.
The high voltage means 9 comprises electrodes and a conductive tube for applying a high voltage to the droplets produced by the spraying device. As shown in FIG. 3, the high voltage apparatus of this embodiment uses a tungsten wire 3 as an electrode, applies a negative voltage to the tungsten wire 3, and the roller in contact with the strip steel 1 is grounded to form a high voltage electrostatic region between the strip steel 1 and the tungsten wire 3, and the mist sprayed from the nozzle 10 is applied with a negative voltage when passing through the region, and collides and adheres to the surface of the coating layer by the electrostatic attraction and air pressure, so that the surface is rapidly cooled. The high voltage used in the high voltage device is 0 to 30000V, preferably 10000 to 30000V.
The cooling device of the embodiment is also provided with a steam fog discharging device 4 for discharging steam and non-evaporated fog drops generated in the cooling process, so that the cooling speed is further improved, and the coating quality and the corrosion resistance of the strip steel are further improved. The vapor-fog discharge device of the embodiment is positioned above the nozzle and above the cooling device. The vapor-fog discharge device comprises a vapor-fog blower, a circulating pump and a vapor-fog storage tank. In order to avoid the influence of the overlarge discharge pressure of the steam fog discharge device on the electrostatic attraction between the charged fog drops and the steel plate, the steam fog discharge device is designed into a structure with adjustable discharge pressure.
In order to prevent the droplets condensed on the cold surfaces such as the frame and the chamber wall surface from falling into the zinc pot and affecting the quality of the coating, the cooling device after hot dip galvanizing strip steel of the embodiment further comprises a water drainage device 8 which is positioned at the lower part of the cooling device after hot dip galvanizing strip steel of the external electrostatic field and below the nozzle. The drainage device comprises a condensed solution collecting tank, a pump and a valve.
In order to prevent the fog drops from entering the high-voltage conductive tube to cause voltage oscillation, the cooling device after hot dip galvanizing strip steel plating of the embodiment is also provided with an air purification device 7. The air purification device is positioned on the upper part of the cooling device and above the nozzle and comprises a purification fan and a control valve. Through setting up air purification device, can stabilize voltage, make the cladding material even, the steady quality.
According to the cooling device after hot-dip galvanized strip steel plating, on one hand, a cooling working medium forms a large number of micro liquid drops after being atomized, the contact area with the strip steel is large, heat exchange is uniform, the temperature gradient of the surface of a plating layer is small, and the quality of the plating layer is improved; on the other hand, an external electrostatic field charges the fog drops and the steel plate, the charged fog drops break through the barriers of the hot air layer on the surface of the coating by utilizing electrostatic attraction and air pressure, contact heat exchange is carried out on the charged fog drops and the surface of the coating, and the cooling speed is improved. In addition, two heat exchange modes of droplet evaporation and droplet and zinc layer convection heat exchange exist on the surface of the coating, the heat exchange coefficient is large, and the cooling speed is greatly improved.
Example two
The utility model discloses another embodiment discloses a cooling method after plating of hot dip galvanized strip steel of plus electrostatic field, including the following steps:
step 1: checking whether each sub-device in the cooling device after plating of the external electrostatic field can work normally, checking whether the air quantity in the air supply device is sufficient, and adding sufficient water or ammonium dihydrogen phosphate (NH) into the liquid supply device4H2PO4) And (3) solution.
Step 2: starting a high voltage device, applying negative voltage on the tungsten wire, grounding the roller contacted with the strip steel, and forming a high voltage electrostatic area between the strip steel and the tungsten wire.
And step 3: the air supply device, the liquid supply device, the spraying device and the water spraying device are sequentially started,Vapor-fog discharging device, water discharging device and air purifying device, using air to discharge water or ammonium dihydrogen phosphate (NH)4H2PO4) And (3) pressurizing and atomizing the solution in a nozzle to form 10-20 mu m fog drops, and cooling the hot-dip galvanized strip steel.
EXAMPLE III
In the embodiment, the cooling device for the hot-dip galvanized strip steel with the external electrostatic field after plating is arranged in a zinc layer solidification crystallization area above an air knife and below an ascending vertical air cooling section, and is combined with an air cooling device for use.
The strip steel 1 moves upward from the zinc pot through the air knife to adjust the thickness of the coating and passes through the cooling device after hot galvanizing strip steel plating of the external electrostatic field. The cooling device after plating is composed of a spraying device 2, a vapor fog discharging device 4, an air supply device 5, a liquid supply device 6, an air purifying device 7, a water discharging device 8, a high voltage device 9 and a connecting pipeline.
The air supply device 5 and the liquid supply device 6 supply compressed air and liquid working medium required by the cooling device to the spraying device 2, and the compressed air and the liquid working medium are atomized by the nozzle 10 to form mist drops with the particle size of 10-20 microns. In order to adapt to the strip steel with different running speeds, 5 stages of nozzles are arranged along the length direction of the strip steel, and each stage of nozzles are arranged along the width direction of the strip steel.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.
Claims (10)
1. A cooling device after hot galvanizing strip steel plating of an external electrostatic field is characterized by comprising a spraying device, a high-voltage device, a liquid supply device and an air supply device; the spraying device comprises a nozzle used for spraying fog drops to the strip steel, the nozzle is connected with the liquid supply device and the gas supply device, the high-voltage device is used for electrifying the strip steel and the fog drops, the liquid supply device is used for supplying liquid capable of generating the fog drops to the spraying device, and the gas supply device is used for supplying gas for converting the liquid into the fog drops to the spraying device;
the number of the nozzles is multiple, and the nozzles are symmetrically distributed on two sides of the strip steel;
the high-voltage device is characterized in that the number of the electrodes is two, each electrode is located between the strip steel and the spraying device, and the two electrodes are located on two sides of the strip steel respectively.
2. The hot-dip galvanized strip steel cooling device with the addition of electrostatic field according to claim 1, characterized in that the nozzles are arranged in a plurality of stages and a plurality of zones along the running direction of the strip steel and the width direction of the strip steel, and the nozzles of each stage and each zone are independently started and stopped.
3. The hot-dip galvanized strip steel post-plating cooling device with the addition of electrostatic field according to claim 1 or 2, characterized in that the liquid supply device comprises a liquid storage tank, a liquid level meter, a stirrer, a control valve and a circulating pump; the liquid storage tank is used for storing liquid, the liquid level meter is used for metering the liquid level of the liquid, and the stirrer is used for stirring the liquid; the control valve and the circulating pump are used for controlling the liquid to start and stop circulating.
4. The hot-dip galvanized strip steel post-plating cooling device with the application of electrostatic field according to claim 3, characterized in that the liquid supply device further comprises a filter and a heater, the filter is used for filtering impurities in the liquid, and the heater is used for heating the liquid.
5. The hot-dip galvanized steel strip cooling device with external electrostatic field according to claim 1, wherein the air supply device comprises an air compressor, an air storage tank and a filter for storing and filtering air.
6. The hot-dip galvanized steel strip cooling device with an external electrostatic field according to claim 3, further comprising a drainage device for collecting and draining condensed water generated in the cooling process, wherein the drainage device is positioned below the nozzle and below the cooling device.
7. The hot-dip galvanized strip steel post-plating cooling device with the application of electrostatic field according to claim 6, characterized in that the drainage device comprises a condensation collection tank, a pump and a valve.
8. The hot-dip galvanized strip steel post-plating cooling device applied with an electrostatic field according to claim 6, further comprising an air cleaning device for preventing mist from entering the conductive pipe of the high-voltage device, wherein the air cleaning device is positioned above the nozzle and at the upper part of the cooling device, and comprises a cleaning fan and a control valve.
9. The hot-dip galvanized steel strip cooling device according to claim 1, further comprising a vapor-spray discharging device for discharging vapor and non-evaporated droplets generated during the cooling process, wherein the vapor-spray discharging device is located above the nozzle at the upper part of the cooling device.
10. The hot-dip galvanized steel strip cooling device with the application of electrostatic field according to claim 9, wherein the vapor-fog discharge device comprises an aerosol blower, a circulating pump and an aerosol storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937068.0U CN210657099U (en) | 2019-06-20 | 2019-06-20 | Cooling device for hot-dip galvanized strip steel plated with external electrostatic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937068.0U CN210657099U (en) | 2019-06-20 | 2019-06-20 | Cooling device for hot-dip galvanized strip steel plated with external electrostatic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210657099U true CN210657099U (en) | 2020-06-02 |
Family
ID=70846253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920937068.0U Active CN210657099U (en) | 2019-06-20 | 2019-06-20 | Cooling device for hot-dip galvanized strip steel plated with external electrostatic field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210657099U (en) |
-
2019
- 2019-06-20 CN CN201920937068.0U patent/CN210657099U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4974422A (en) | Evaporative condenser with fogging nozzle | |
| EP0921208B1 (en) | Method for cooling strip material | |
| CN202024429U (en) | Four-level direct evaporative cooling air conditioning unit combining high pressure atomizing with dropping and sprinkling padding | |
| CN102000676A (en) | Surface treatment method of metal member and cleaning nozzle | |
| WO2008092893A1 (en) | Evaporative cooler and use thereof and gas turbine system comprising an evaporative cooler | |
| CN210657099U (en) | Cooling device for hot-dip galvanized strip steel plated with external electrostatic field | |
| CN114472531A (en) | Finishing mill is used in electrode aluminium foil production | |
| CN110257746B (en) | Hot-dip galvanized strip steel post-plating cooling system and method with external electrostatic field | |
| KR100504370B1 (en) | Method and apparatus for producing the zinc plated steel | |
| CN116273630A (en) | Color-coated plate production line | |
| CN109457205B (en) | Air humidifying and cooling method and cooling system for strip steel after plating | |
| CN216864289U (en) | Water mist cooling device for galvanized steel strip | |
| JPS59112871A (en) | Air conditioner for coating | |
| KR100415677B1 (en) | A Method for Producing Spangle Free Hot Dip Galvanizing Steel Sheet | |
| CN216911528U (en) | Spray cooling mechanism of high-speed cold rolling unit | |
| CN213395694U (en) | Gradient formula cooling arrangement | |
| CN209522894U (en) | Air wetting cooling system after a kind of plating of strip | |
| CN212988041U (en) | Galvanized strip steel cooling structure | |
| CN201024208Y (en) | Atomized cooling device for cold-rolled plate hot galvanizing production | |
| JP6673307B2 (en) | Manufacturing method of surface treated metal sheet | |
| US2429862A (en) | Apparatus for oiling sheet metal | |
| CN209849009U (en) | Evaporative cooling's ball mill | |
| CN113530274A (en) | Building outer wall maintenance equipment and maintenance method | |
| JP3637874B2 (en) | Spungle refiner for hot-dip galvanized steel sheet and method for producing different spangled hot-dip galvanized steel sheet | |
| CN221334939U (en) | Scaling powder spraying box and scaling powder spraying equipment with same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210915 Address after: 100081 No. 1, bungalow, building 38, No. 76, Xueyuan South Road, Haidian District, Beijing Patentee after: Gangyan Engineering Design Co.,Ltd. Address before: 100081 8-01-15, craft building, 76 Xueyuan South Road, Haidian District, Beijing Patentee before: BEIJING GANGYAN NEW METALLURGY ENGINEERING DESIGN Co.,Ltd. |