WO2023071419A1 - 一种冷轧带钢碱洗消泡系统 - Google Patents

一种冷轧带钢碱洗消泡系统 Download PDF

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Publication number
WO2023071419A1
WO2023071419A1 PCT/CN2022/112414 CN2022112414W WO2023071419A1 WO 2023071419 A1 WO2023071419 A1 WO 2023071419A1 CN 2022112414 W CN2022112414 W CN 2022112414W WO 2023071419 A1 WO2023071419 A1 WO 2023071419A1
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foam
lye
box
ultrasonic
cold
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PCT/CN2022/112414
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English (en)
French (fr)
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周云根
王耀
廖砚林
贾鸿雷
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中冶南方工程技术有限公司
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Publication of WO2023071419A1 publication Critical patent/WO2023071419A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/02—Foam dispersion or prevention
    • 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
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
    • C23G3/025—Details of the apparatus, e.g. linings or sealing means

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  • the invention belongs to the technical field of alkaline cleaning equipment for cold-rolled strip steel, and in particular relates to an alkaline cleaning and defoaming system for cold-rolled strip steel.
  • the method of adding defoamer to the lye is mostly used for defoaming in production, such as CN201266190Y, etc.
  • This method not only increases the production cost, but also because the defoamer is insoluble or slightly soluble in lye, it is difficult to The presence of particles will accelerate nozzle clogging and affect degreasing production.
  • the defoamer also contains organic silicon or polyethers that are difficult to degrade, which increases the difficulty of the disposal of waste lye and brings environmental protection discharge pressure.
  • CN204671944U has announced the lye spray defoaming device, uses circulation pump to extract the lye in the lye circulation tank, removes the oil in the lye through the oil-water separation device, and the lye is discharged by the spray pipe arranged on the top of the lye circulation tank. Spray on the foam to control the height of the foam in the tank.
  • This method is easy to implement, and the structure of the defoaming device is simple, but the lye sprayed from the nozzle is a thick liquid flow, and the diameter of the foam is small, so the defoaming effect is not ideal, and there are also problems such as nozzle clogging.
  • CN213596414U has announced a kind of cold-rolled steel strip lye defoaming device, adopts steam as injection medium, and controls the opening degree of regulating valve on the steam pipeline to control the size of steam by foam induction device and controller, realizes lye circulation
  • the automatic control of the foam in the tank, the defoaming device for the continuous generation of cold-rolled strip steel, a large amount of foam requires continuous steam injection, resulting in serious dilution of the alkali concentration, high alkali consumption and cleaning quality cannot be guaranteed.
  • CN204918781U discloses a heating and defoaming device, constructing a defoaming box installed on the side of the lye circulation tank and some heating devices arranged in the box, communicating with the circulation tank through pipelines to realize the entry of foam and the lye
  • the essence of reflux is still steam coil heating, and the defoaming efficiency is low.
  • CN212854755U discloses a kind of lye tank with ultrasonic defoaming function, by arranging ultrasonic vibrating rod in the tank body, the ultrasonic waves produced by ultrasonic vibrating rod can effectively eliminate foam in the tank, and can reduce the corrosion of lye foam to equipment.
  • the ultrasonic waves produced by ultrasonic vibrating rod can effectively eliminate foam in the tank, and can reduce the corrosion of lye foam to equipment.
  • the object of the present invention is to provide an alkali cleaning and defoaming system for cold-rolled strip steel, which can at least solve some of the defects in the prior art.
  • the present invention adopts the following technical solutions:
  • An alkali cleaning and defoaming system for cold-rolled strip steel including an online tank body, an alkali liquid circulation tank, an ultrasonic foam breaking mechanism, a thermal bubble bursting box and a negative pressure foam flow device, the alkali liquid outlet of the online tank body passes through the alkali liquid
  • the conveying pipeline is connected with the liquid inlet of the lye circulation tank, the ultrasonic bubble breaking mechanism is connected with the lye conveying pipeline, and the foam inlet is arranged on the heat bursting box, and the foam inlet is connected with the lye
  • the circulation tank is connected, and the lye circulation tank is an airtight structure, the outlet of the hot bubble explosion box is connected with the negative pressure foam flow device through a foam drainage pipeline, and a heating element is arranged in the heat explosion bubble box.
  • the ultrasonic bubble breaking mechanism includes a backflow filter frame, an ultrasonic vibrator and an ultrasonic driver, the backflow filter frame is an airtight structure, the backflow filter frame is connected to the lye delivery pipeline, and the vibrating end of the ultrasonic vibrator Placed in the backflow filter frame, the ultrasonic drive part is electrically connected with the ultrasonic vibrator.
  • the lye delivery pipeline adopts a large-diameter pipeline.
  • thermal burst box is arranged on the top of the lye circulation tank or the upper part of the side wall of the lye circulation tank.
  • the hot bubble box is a tapered structure with a large bottom and a small top in cross section, the foam inlet is located at the bottom of the hot bubble box, and the outlet of the hot bubble box is located at the top of the hot bubble box, so A deflector is arranged in the heat bursting box.
  • a temperature measuring probe is provided at the end of the foam drainage pipeline close to the thermal burst box, and the heating power control of the heating element in the thermal bubble box is interlocked with the temperature measuring probe.
  • a negative pressure fan is provided on the foam drainage pipe.
  • the upper part of the side wall of the lye circulation tank is provided with an lye overflow port, and the lye overflow port is connected to the ground pit through an overflow pipe, and the lye overflow port adopts a U-shaped water seal or an overflow Streamline shutoff valve closed.
  • the foam drainage pipe is provided with a foam volume monitoring component, and the foam volume signal of the foam volume monitoring component is interlocked with the ultrasonic bubble breaking mechanism and the heating element of the thermal bubble bursting box.
  • liquid outlet of the lye circulation tank is connected to the liquid inlet of the line tank through the lye circulation pump, and the start-stop control of the ultrasonic bubble breaking mechanism is interlocked with the lye circulation pump.
  • the cold-rolled steel strip alkali cleaning and defoaming system provided by the present invention adopts a lye circulation tank, an ultrasonic foam breaking mechanism, a thermal bursting box and a negative pressure foam flow device, and utilizes multiple physical methods such as ultrasonic, heating, and negative pressure to combine Realize low-consumption and high-efficiency defoaming, completely abandon the chemical method of adding defoamer to the lye, achieve the purpose of green environmental protection and emission reduction, and at the same time do not pollute the original lye, can realize the recycling of lye, suitable for cold rolling Elimination of foam in the cleaning process section of silicon steel, continuous annealing and galvanizing units.
  • Fig. 1 is a schematic structural view of the cold-rolled strip alkali cleaning defoaming system of the present invention.
  • first and second are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Therefore, the features defined as “first” and “second” may explicitly or implicitly include one or more of these features; in the description of the present invention, unless otherwise specified, the meaning of "plurality” is two or more.
  • this embodiment provides a cold-rolled strip alkali cleaning defoaming system, including line tank body 1, lye circulation tank 5, ultrasonic foam breaking mechanism 2, thermal bursting box 6 and negative pressure foam flow device 13, the lye outlet of the online tank body 1 is connected with the liquid inlet of the lye circulation tank 5 through the lye delivery pipeline, and the ultrasonic bubble breaking mechanism 2 is connected on the lye delivery pipeline, the The hot bubble box 6 is provided with a foam inlet, and the foam inlet is connected with the lye circulation tank 5, and the lye circulation tank 5 is an airtight structure, and a cover with a rubber pad is adopted at the top of the lye circulation tank 5 Board is installed, realizes the foam cavity airtight of lye circulation tank 5, and the outlet of described thermal bubble explosion box 6 is connected with negative pressure foam flow device 13 by foam drainage pipe 7, and heating element is arranged in described thermal bubble explosion box 6 .
  • the online tank body 1 is used to clean the cold-rolled strip with lye, and the cleaned lye flows through the lye outlet of the online tank body 1 to the lye circulation tank 5 through the lye delivery pipeline.
  • the foam that produces in the lye cleaning process can first carry out ultrasonic defoaming treatment through the ultrasonic foam breaking mechanism 2, thereby reduces the amount of foam entering the lye circulation tank 5;
  • the foam enters into the hot bubble box 6 through the foam inlet, and is heated by the heating element in the hot bubble box 6.
  • the foam flow in the lye circulation tank 5 can be introduced in the thermal bubble explosion box 6 by the suction of negative pressure, on the other hand,
  • the internal gas pressure increases after heating, and at this time, the mechanical pressure of the negative pressure acts to accelerate the bursting of the foam, and the internal gas after the bursting of the foam flows through the negative pressure foam flow device 13 Discharge after treatment.
  • This embodiment uses multiple physical methods such as ultrasound, heating, and negative pressure to achieve low-consumption and high-efficiency defoaming. row purpose.
  • the heating elements in the thermal bubble box 6 in this embodiment can use electric heating tubes, steam heating tubes, superheated water heating tubes or high-temperature flue gas heating tubes to heat the foam, and the specific heating methods can be determined according to actual conditions.
  • the heat source that can be provided by the production occasion is selected; and the specific installation structure of the heating pipe in the heat bursting box 6 is an existing conventional technology, and will not be repeated here.
  • the ultrasonic bubble breaking mechanism 2 includes a backflow filter frame 4, an ultrasonic vibrator 3 and an ultrasonic driver (not shown in the figure), the backflow filter frame 4 is a closed structure, and the backflow filter frame 4 is connected to the lye delivery pipeline, the vibrating end of the ultrasonic vibrator 3 is placed in the backflow filter frame 4, and the ultrasonic driving part is electrically connected to the ultrasonic vibrator 3.
  • the ultrasonic vibrator 3 adopts a magnetostrictive structure ultrasonic vibrator that can work continuously and prevent dry burning, and is fixed on the outer wall of the return filter frame 4 by welding.
  • the backflow filter frame 4 plays a role in filtering the lye for cleaning the cold-rolled strip steel, and can also perform preliminary defoaming on the foam in the lye during the filtering process.
  • the ultrasonic drive part drives the ultrasonic vibrator 3 to work,
  • the ultrasonic wave generated by the ultrasonic vibrator 3 effectively eliminates the lye foam in the backflow filter frame 4 , reduces the amount of foam entering the lye circulation tank 5 , thereby reducing the foam processing capacity in the lye circulation tank 5 .
  • the lye delivery pipeline adopts a large-diameter pipeline.
  • the hot bubble box 6 can be arranged on the top of the lye circulation tank 5 or the upper part of the side wall of the lye circulation tank 5, that is, the foam of the hot bubble box 6
  • the inlet is connected with the top or the side wall top of the lye circulation tank 5, so that the foam overflowing from the lye circulation tank 5 top enters the hot bubble box 6 smoothly, and the lye after the bursting of the foam returns smoothly.
  • the thermal burst box 6 is a conical structure with a large upper part and a smaller cross section
  • the foam inlet is located at the bottom of the thermal burst box 6
  • the outlet of the thermal burst box 6 is located at The top of the hot bubble box 6, through this structural design of the hot bubble box 6, further improves the rate at which foam enters the hot bubble box 6, thereby improving the defoaming effect and defoaming efficiency.
  • a deflector can be arranged in the thermal burst box 6 .
  • one end near the thermal burst box 6 is provided with a temperature measuring probe (not marked in the figure), and the heating power control of the heating element in the thermal burst box 6 is related to the temperature measurement
  • the probes are interlocked to control the outlet air temperature of the hot bubble box 6 to prevent the temperature in the hot bubble box 6 from being too high and the air pressure too high to affect the negative pressure defoaming effect.
  • the foam drainage pipe 7 is provided with a negative pressure fan 12 .
  • a foam volume monitoring unit 11 can be installed on the foam drainage pipe 7 to detect the foam residual after mechanical treatment such as ultrasonic, heating, negative pressure, etc.
  • the foam volume monitoring Part 11 can use means such as window, conductivity probe, scale scale;
  • the foam amount signal that foam amount monitoring part 11 detects can be interlocked with the heating element in ultrasonic bubble breaking mechanism 2, thermal bubble bursting box 6, with Feedback regulates defoaming power.
  • an lye overflow port can also be provided on the upper part of the side wall of the lye circulation tank 5, and the lye overflow port is connected to the pit 9 through an overflow pipe 8 to prevent the above-mentioned ultrasonic , heating, and negative pressure cannot in time handle the foam produced by the lye cleaning cold-rolled strip steel, and when the foam in the lye circulation tank 5 is processed in time, the lye overflow port can be used with a U-shaped water seal or an overflow pipe The shut-off valve is closed.
  • the overflow pipe 8 and the foam drainage pipeline 7 can be connected through a pipeline, and a regulating valve 10 is set on the pipeline, and the foam drainage pipeline 7 can be emptied to the pit through the control of the regulating valve 10 .
  • the lye in the lye circulation tank 5 due to the filtration through the reflux filter frame 4, its lye can be recycled and reused, so the liquid outlet of the lye circulation tank 5 can be passed through the lye circulation pump 14 is connected to the liquid inlet of the line tank body 1, and the start-stop control of the ultrasonic bubble breaking mechanism 2 is interlocked with the lye circulation pump 14.
  • the cold-rolled steel strip alkali cleaning and defoaming system adopts an alkali circulation tank, an ultrasonic foam breaking mechanism, a thermal bubble bursting box and a negative pressure foam flow device, and utilizes ultrasonic, heating, negative pressure, etc.
  • Combining multiple physical methods to achieve low-consumption and high-efficiency defoaming completely abandoning the chemical method of adding defoamers to the lye, achieving the goal of green environmental protection and emission reduction, while not polluting the original lye, and realizing the recycling of lye It is suitable for the elimination of foam in the cleaning process section of cold-rolled silicon steel, continuous annealing and galvanizing units.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

本发明提供了一种冷轧带钢碱洗消泡系统，包括在线槽体、碱液循环罐、超声破泡机构、热爆泡盒和负压泡沫流装置，在线槽体的碱液出口通过碱液输送管道与碱液循环罐的进液口连接，超声破泡机构连接于碱液输送管道上，热爆泡盒上设有泡沫入口，泡沫入口与碱液循环罐连接，热爆泡盒的出口通过泡沫引流管道与负压泡沫流装置连接，热爆泡盒内设有加热元件。该发明采用碱液循环罐、超声破泡机构、热爆泡盒和负压泡沫流装置，利用超声、加热、负压等多种物理方式结合实现低耗高效消泡，完全舍弃了向碱液中投加消泡剂的化学方法，达到绿色环保减排目的，同时不污染原碱液，可实现碱液的循环重复利用，适用于冷轧硅钢、连退及镀锌机组清洗工艺段泡沫的消除。

Description

一种冷轧带钢碱洗消泡系统 技术领域
本发明属于冷轧带钢碱液清洗设备技术领域，具体涉及一种冷轧带钢碱洗消泡系统。
背景技术
带钢经冷轧后表面带有大量的残留物，主要为轧制油、铁粉以及松散杂质，这些油脂和残留铁粉混合在一起，必须通过清洗脱脂工序将其清除才能进入下道工序处理，因此，现有冷轧连退、镀锌、脱脂等机组均设有清洗工艺段。
然而在清洗工艺段，冷轧带钢在高速清洗过程中，碱液循环系统会产生大量泡沫，经常发生强碱性泡沫外溢现象，导致现场操作环境恶劣，甚至出现该区域的仪表元件被泡沫淹没损坏等事故，同时也导致碱液活性成分流失严重，清洗效率降低。
目前生产上多采用向碱液中投加消泡剂的方法进行消泡，如CN201266190Y等，这种方法不仅增加了生产成本，而且由于消泡剂不溶于或微溶于碱液，以一定大小的颗粒存在，因此会加速喷嘴堵塞，影响脱脂生产。此外，消泡剂中还含有机硅或聚醚类等难降解的有机机物，增加了废碱液的处理难度，带来环保排放压力。
CN204671944U公布了碱液喷淋消泡装置，使用循环泵将碱液循环罐中的碱液抽出，经油水分离装置去除碱液中的油分，通过布置在碱液循环罐顶部的喷管将碱液喷向泡沫，以此来控制罐中泡沫的高度。这种方法易于实施，消泡装置结构简单，但从喷管中喷出的碱液为粗大液流，而泡沫的直径较小，因此消泡效果不理想，另外还存在喷管堵塞等问题。
CN213596414U公布了一种冷轧带钢碱液消泡装置，采用蒸汽作为喷射 介质，并通过泡沫感应装置和控制器来控制蒸汽管路上调节阀的开口程度来控制蒸汽的大小，实现对碱液循环罐里泡沫的自动控制，该消泡装置对于冷轧带钢持续性产生中，大量泡沫需要蒸汽持续性喷射，导致碱液浓度稀释严重，碱耗高且清洗质量无法保证。
CN204918781U公布了一种加热消泡装置，构造了一种安装在碱液循环罐侧面上的消泡箱和若干设置于箱体内的加热装置，通过管道与循环罐联通，实现泡沫的进入及碱液回流，其本质仍是蒸汽盘管加热，消泡效率低。
CN212854755U公布了一种具有超声波消泡功能的碱液罐，通过在罐体内设置超声波振动棒，通过超声波振动棒产生的超声波可有效地消除罐内泡沫，可减少碱液泡沫对设备的腐蚀。然而，针对碱液罐内的大量泡沫采用超声波振动棒难以有效去除泡沫。
因此，为解决带钢脱脂清洗的共性问题，有必要开发新的碱液消泡技术和消泡装置。
发明内容
本发明的目的是提供一种冷轧带钢碱洗消泡系统，至少可以解决现有技术中存在的部分缺陷。
为实现上述目的，本发明采用如下技术方案：
一种冷轧带钢碱洗消泡系统，包括在线槽体、碱液循环罐、超声破泡机构、热爆泡盒和负压泡沫流装置，所述在线槽体的碱液出口通过碱液输送管道与所述碱液循环罐的进液口连接，所述超声破泡机构连接于碱液输送管道上，所述热爆泡盒上设有泡沫入口，所述泡沫入口与所述碱液循环罐连接，所述碱液循环罐为密闭结构，所述热爆泡盒的出口通过泡沫引流管道与负压泡沫流装置连接，所述热爆泡盒内设有加热元件。
进一步的，所述超声破泡机构包括回流过滤框、超声波振子和超声波驱动件，所述回流过滤框为密闭结构，所述回流过滤框连接于碱液输送管道上，所述超声波振子的振动端置于回流过滤框内，所述超声波驱动件与 超声波振子电连接。
进一步的，所述碱液输送管道采用大口径管道。
进一步的，所述热爆泡盒布置于碱液循环罐顶部或碱液循环罐侧壁上部。
进一步的，所述热爆泡盒为横截面下大上小的锥形结构，所述泡沫入口位于热爆泡盒的底部，所述热爆泡盒的出口位于热爆泡盒的顶部，所述热爆泡盒内设置导流板。
进一步的，所述泡沫引流管道上靠近热爆泡盒一端设有测温探头，所述热爆泡盒内的加热元件的加热功率控制与所述测温探头联锁。
进一步的，所述泡沫引流管道上设有负压风机。
进一步的，所述碱液循环罐侧壁上部设有碱液溢流口，所述碱液溢流口通过溢流管连接至地坑，所述碱液溢流口采用U型水封或溢流管截止阀封闭。
进一步的，所述泡沫引流管道上设有泡沫量监测件，所述泡沫量监测件的泡沫量信号与所述超声破泡机构以及热爆泡盒的加热元件联锁。
进一步的，所述碱液循环罐的出液口通过碱液循环泵与在线槽体的进液口连接，所述超声破泡机构的启停控制与碱液循环泵联锁。
与现有技术相比，本发明的有益效果：
本发明提供的这种冷轧带钢碱洗消泡系统采用碱液循环罐、超声破泡机构、热爆泡盒和负压泡沫流装置，利用超声、加热、负压等多种物理方式结合实现低耗高效消泡，完全舍弃了向碱液中投加消泡剂的化学方法，达到绿色环保减排目的，同时不污染原碱液，可实现碱液的循环重复利用，适用于冷轧硅钢、连退及镀锌机组清洗工艺段泡沫的消除。
以下将结合附图对本发明做进一步详细说明。
附图说明
图1是本发明冷轧带钢碱洗消泡系统的结构示意图。
附图标记说明：1、在线槽体；2、超声破泡机构；3、超声波振子；4、回流过滤框；5、碱液循环罐；6、热爆泡盒；7、泡沫引流管道；8、溢流管；9、地坑；10、调节阀；11、泡沫量监测件；12、负压风机；13、负压泡沫流装置；14、碱液循环泵。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
在本发明的描述中，需要理解的是，术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征；在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上。
如图1所示，本实施例提供了一种冷轧带钢碱洗消泡系统，包括在线槽体1、碱液循环罐5、超声破泡机构2、热爆泡盒6和负压泡沫流装置13，所述在线槽体1的碱液出口通过碱液输送管道与所述碱液循环罐5的进液口连接，所述超声破泡机构2连接于碱液输送管道上，所述热爆泡盒6上设有泡沫入口，所述泡沫入口与所述碱液循环罐5连接，所述碱液循环罐5为密闭结构，具体在碱液循环罐5顶部采用带胶垫的盖板进行安装，实现碱液循环罐5的泡沫腔密闭，所述热爆泡盒6的出口通过泡沫引流管道7 与负压泡沫流装置13连接，所述热爆泡盒6内设有加热元件。
在本实施例中，在线槽体1用于对冷轧带钢进行碱液清洗，清洗后的碱液通过在线槽体1的碱液出口经碱液输送管道流至碱液循环罐5内，而在此碱液输送过程中，由于碱液清洗过程中产生的泡沫可先经超声破泡机构2进行超声波消泡处理，从而减少进入碱液循环罐5内泡沫量；碱液循环罐5内的泡沫经泡沫入口进入到热爆泡盒6内，经热爆泡盒6内的加热元件进行加热，泡沫经加热后提高了其内气体压力，泡沫液膜迅速变薄而破裂；与此同时，热爆泡盒6的出口侧连接负压泡沫流装置13，一方面，通过负压的抽吸作用可将碱液循环罐5内的泡沫流引入热爆泡盒6内，另一方面，对于热爆泡盒6未处理的泡沫，经过加热后其内部气体压力升高，此时经负压的机械压力作用，从而加速泡沫的破裂，泡沫破裂后的内部气体流经负压泡沫流装置13处理后排出。本实施例利用超声、加热、负压等多种物理方式结合实现低耗高效消泡，完全舍弃了向碱液中投加消泡剂的化学方法，不污染原碱液，同时达到绿色环保减排目的。其中，本实施例中热爆泡盒6内的加热元件可采用电加热管、蒸汽加热管、过热水加热管或高温烟气加热管等方式对泡沫进行加热，其具体加热方式可根据实际生产场合所能提供的热源进行选择；而加热管在热爆泡盒6内的具体安装结构为现有常规技术，此处不再赘述。
一种具体的实施方式，所述超声破泡机构2包括回流过滤框4、超声波振子3和超声波驱动件(图中未示出)，所述回流过滤框4为密闭结构，所述回流过滤框4连接于碱液输送管道上，所述超声波振子3的振动端置于回流过滤框4内，所述超声波驱动件与超声波振子3电连接。其中，超声波振子3采用可连续工作、防干烧的磁致伸缩结构超声波振子，通过焊接固定于回流过滤框4外壁。回流过滤框4对清洗冷轧带钢的碱液起到过滤的作用，并且在过滤过程中亦可对碱液中的泡沫进行初步消泡，与此同时，超声波驱动件驱动超声波振子3工作，通过超声波振子3产生的超声波对 回流过滤框4内的碱液泡沫进行有效消除，减少进入碱液循环罐5内的泡沫量，从而降低对碱液循环罐5内泡沫处理量。优化的，所述碱液输送管道采用大口径管道。
对于热爆泡盒6的安装方式，如图1所示，所述热爆泡盒6可布置于碱液循环罐5顶部或碱液循环罐5侧壁上部，即热爆泡盒6的泡沫入口与碱液循环罐5的顶部或侧壁上部连接，这样便于碱液循环罐5上部外溢的泡沫顺利进入热爆泡盒6，同时泡沫破裂后的碱液顺利回流。
作为一种优化的实施方式，所述热爆泡盒6为横截面下大上小的锥形结构，所述泡沫入口位于热爆泡盒6的底部，所述热爆泡盒6的出口位于热爆泡盒6的顶部，通过对热爆泡盒6的这一结构设计，进一步提高了泡沫进入热爆泡盒6的速率，从而提高消泡效果和消泡效率。进一步的，可在所述热爆泡盒6内设置导流板。
优选的，在所述泡沫引流管道7上靠近热爆泡盒6一端设有测温探头(图中未标示)，所述热爆泡盒6内的加热元件的加热功率控制与所述测温探头联锁，以控制热爆泡盒6的出口风温，避免热爆泡盒6内温度过高，气压过大影响负压消泡效果。进一步的，所述泡沫引流管道7上设有负压风机12。
进一步的，为了保证消泡效果，可在所述泡沫引流管道7上设置泡沫量监测件11，用于检测经超声、加热、负压等机械处理后泡沫余量，具体的，该泡沫量监测件11可以使用视窗、电导率探头、刻度标尺等手段；优选的，可将泡沫量监测件11检测的泡沫量信号与超声破泡机构2、热爆泡盒6内的加热元件联锁，以反馈调节消泡功率。
在优选的实施方式中，还可在所述碱液循环罐5侧壁上部设有碱液溢流口，所述碱液溢流口通过溢流管8连接至地坑9，以防止上述超声、加热、负压不能及时处理碱液清洗冷轧带钢产生的泡沫，而当碱液循环罐5内泡沫及时处理时，可将所述碱液溢流口采用U型水封或溢流管截止阀进行关 闭。可选的，在溢流管8与泡沫引流管道7之间可通过管道连接，并在该管道上设置调节阀10，通过调节阀10的控制以实现对泡沫引流管道7的排空至地坑。
进一步的，对于碱液循环罐5内的碱液，由于经过回流过滤框4的过滤，其碱液可以循环重复利用，因而可将所述碱液循环罐5的出液口通过碱液循环泵14与在线槽体1的进液口连接，所述超声破泡机构2的启停控制与碱液循环泵14联锁。
综上所述，本发明提供的这种冷轧带钢碱洗消泡系统采用碱液循环罐、超声破泡机构、热爆泡盒和负压泡沫流装置，利用超声、加热、负压等多种物理方式结合实现低耗高效消泡，完全舍弃了向碱液中投加消泡剂的化学方法，达到绿色环保减排目的，同时不污染原碱液，可实现碱液的循环重复利用，适用于冷轧硅钢、连退及镀锌机组清洗工艺段泡沫的消除。
以上例举仅仅是对本发明的举例说明，并不构成对本发明的保护范围的限制，凡是与本发明相同或相似的设计均属于本发明的保护范围之内。

Claims (10)

  1. 一种冷轧带钢碱洗消泡系统，其特征在于：包括在线槽体、碱液循环罐、超声破泡机构、热爆泡盒和负压泡沫流装置，所述在线槽体的碱液出口通过碱液输送管道与所述碱液循环罐的进液口连接，所述超声破泡机构连接于碱液输送管道上，所述热爆泡盒上设有泡沫入口，所述泡沫入口与所述碱液循环罐连接，所述碱液循环罐为密闭结构，所述热爆泡盒的出口通过泡沫引流管道与负压泡沫流装置连接，所述热爆泡盒内设有加热元件。
  2. 如权利要求1所述的一种冷轧带钢碱洗消泡系统，其特征在于：所述超声破泡机构包括回流过滤框、超声波振子和超声波驱动件，所述回流过滤框为密闭结构，所述回流过滤框连接于碱液输送管道上，所述超声波振子的振动端置于回流过滤框内，所述超声波驱动件与超声波振子电连接。
  3. 如权利要求1所述的一种冷轧带钢碱洗消泡系统，其特征在于：所述碱液输送管道采用大口径管道。
  4. 如权利要求1所述的一种冷轧带钢碱洗消泡系统，其特征在于：所述热爆泡盒布置于碱液循环罐顶部或碱液循环罐侧壁上部。
  5. 如权利要求1所述的一种冷轧带钢碱洗消泡系统，其特征在于：所述热爆泡盒为横截面下大上小的锥形结构，所述泡沫入口位于热爆泡盒的底部，所述热爆泡盒的出口位于热爆泡盒的顶部，所述热爆泡盒内设置导流板。
  6. 如权利要求1所述的一种冷轧带钢碱洗消泡系统，其特征在于：所述泡沫引流管道上靠近热爆泡盒一端设有测温探头，所述热爆泡盒内的加热元件的加热功率控制与所述测温探头联锁。
  7. 如权利要求1所述的一种冷轧带钢碱洗消泡系统，其特征在于：所述泡沫引流管道上设有负压风机。
  8. 如权利要求1所述的一种冷轧带钢碱洗消泡系统，其特征在于：所述碱液循环罐侧壁上部设有碱液溢流口，所述碱液溢流口通过溢流管连接 至地坑，所述碱液溢流口采用U型水封或溢流管截止阀封闭。
  9. 如权利要求1所述的一种冷轧带钢碱洗消泡系统，其特征在于：所述泡沫引流管道上设有泡沫量监测件，所述泡沫量监测件的泡沫量信号与所述超声破泡机构以及热爆泡盒的加热元件联锁。
  10. 如权利要求1所述的一种冷轧带钢碱洗消泡系统，其特征在于：所述碱液循环罐的出液口通过碱液循环泵与在线槽体的进液口连接，所述超声破泡机构的启停控制与碱液循环泵联锁。
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