Strip cleaning system and cold reduction decarburization annealing train

Abstract

The application discloses a strip steel cleaning system and a cold rolling decarburization annealing unit, and belongs to the technical field of strip steel cleaning devices. The strip steel cleaning system comprises a circulating tank, an alkali spraying tank, an alkali brushing tank, a conveying assembly, a backflow assembly and a defoaming assembly. The conveying assembly is connected with the circulating tank and the alkali spraying tank, and is used for conveying alkali liquor in the circulating tank into the alkali spraying tank; the conveying assembly is also connected with the circulating tank and the alkali brushing tank, and is used for conveying alkali liquor in the circulating tank into the alkali brushing tank. The backflow assembly is connected with the circulating tank and the alkali spraying tank, and is also connected with the circulating tank and the alkali brushing tank. The defoaming assembly has an inlet and a plurality of first outlets connected with the inlet, the inlet is connected with the conveying assembly, the plurality of first outlets are arranged at the top of the circulating tank in a spaced mode, and the first outlets are directed to the tank bottom of the circulating tank. When there is foam in the circulating tank, the alkali liquor sprayed from the first outlets is sprayed on the surface of the foam, so that the foam is broken, thereby reducing the amount of foam in the circulating tank and avoiding the overflow of the alkali liquor from the top of the circulating tank due to the excessive accumulation of the foam.

Description

Technical Field

[0001] This application belongs to the technical field of strip steel cleaning equipment, and particularly relates to a strip steel cleaning system and a cold rolling decarburization annealing unit. Background Technology

[0002] The main function of the cold-rolled decarburizing annealing unit is to anneal and coat grain-oriented silicon steel. The cleaning section, as the pre-furnace strip cleaning process section of the annealing line, employs a high-efficiency, water-saving degreasing device, combining physical and chemical methods to remove oil and other impurities from the strip surface, ensuring a clean surface. Its cleaning effect directly affects the surface quality of the silicon steel and the formation of the oxide film, making it a crucial step in the silicon steel production process.

[0003] After entering the cleaning section, the strip steel sequentially enters the alkali spray tank and the alkali brush tank. A circulating pump sprays alkali solution at approximately 60℃ and 0.25MPa through nozzles in the alkali spray tank and alkali brush tank onto the upper and lower surfaces of the strip steel. Brush rollers in the alkali brush tank scrub the upper and lower surfaces of the strip steel, cleaning away oil, dust, and other impurities. Then, squeeze rollers in the alkali brush tank squeeze out the alkali solution. Excess alkali solution flows back to the circulating tank through return pipes at the bottom of the alkali spray tank and alkali brush tank. The circulating pump then transports the alkali solution from the circulating tank back to the alkali spray tank and alkali brush tank, thus continuously circulating and spraying the alkali solution to clean the strip steel.

[0004] During the rinsing of steel strips, alkaline solution generates a large amount of foam. The foam gradually accumulates in the circulation tank and eventually overflows from the top of the circulation tank, carrying a large amount of alkaline solution, resulting in waste of rinsing solution. Utility Model Content

[0005] This application aims to at least partially solve the technical problem of excessive foam accumulation in circulating tanks. To this end, this application provides a strip steel cleaning system and a cold rolling decarburization annealing unit.

[0006] In a first aspect, an embodiment of this application provides a strip steel cleaning system, comprising:

[0007] Circulation tank;

[0008] Alkali spray tank;

[0009] Alkali brush tank;

[0010] A conveying assembly, connected to the circulation tank and the alkali spray tank, is used to deliver alkali solution from the circulation tank into the alkali spray tank; it is also connected to the circulation tank and the alkali brush tank, and is used to deliver alkali solution from the circulation tank into the alkali brush tank;

[0011] The reflux assembly is connected to the circulation tank and the alkali spray tank, and also to the circulation tank and the alkali brush tank;

[0012] The defoaming component has an inlet and a plurality of first outlets communicating with the inlet, the inlet being connected to the conveying component, and the plurality of first outlets being spaced apart at the top of the circulation tank and the first outlets facing the bottom of the circulation tank.

[0013] In some embodiments, the defoaming component includes:

[0014] A plurality of first nozzles, each having a first outlet, are spaced apart at the top of the circulation tank and face the bottom of the circulation tank;

[0015] The connecting tube is connected at one end to the conveying assembly and at the other end to the first nozzle.

[0016] In some embodiments, the strip cleaning system further includes a filter device installed on the return assembly.

[0017] In some embodiments, the filtering device is a magnetic filter.

[0018] In some embodiments, the defoaming component further has a plurality of second outlets communicating with the inlet, the plurality of second outlets being spaced apart within the housing of the magnetic filter and located at the top of the housing and facing the bottom of the housing.

[0019] In some embodiments, the defoaming component includes:

[0020] A plurality of first nozzles, each having a first outlet, are spaced apart at the top of the circulation tank and face the bottom of the circulation tank;

[0021] A plurality of second nozzles, having the second outlet, are spaced apart within the housing and face the bottom of the housing;

[0022] The connecting tube has one end connected to the conveying assembly and the other end connected to the first nozzle and the second nozzle.

[0023] In some embodiments, the defoaming component further includes:

[0024] A level gauge is installed inside the circulation tank;

[0025] An automatic control valve is installed on the connecting pipe;

[0026] The controller is electrically connected to both the level gauge and the automatic control valve, and controls the opening and closing of the automatic control valve based on the level value detected by the level gauge.

[0027] In some embodiments, the delivery assembly includes:

[0028] The first conveying pipe connects the circulation tank and the alkali spray tank;

[0029] The first pump, installed on the first delivery pipe, is used to pump the alkaline solution in the circulation tank into the alkaline spray tank;

[0030] The second conveying pipe is connected to the circulation tank and the alkali brush tank;

[0031] The second pump, installed in the second delivery pipe, is used to pump the alkali solution in the alkali brush tank into the alkali brush tank;

[0032] The inlet of the defoaming component is connected to either the first delivery pipe or the second delivery pipe.

[0033] In some embodiments, the reflow component includes:

[0034] The first return pipe connects the circulation tank and the alkali spray tank;

[0035] The second return pipe connects the circulation tank and the alkali brush tank.

[0036] Secondly, the cold rolling decarburization annealing unit provided in the embodiments of this application includes the strip steel cleaning system described in the first aspect above.

[0037] This utility model has at least the following beneficial effects:

[0038] The strip cleaning system includes: a circulation tank, an alkali spray tank, an alkali brush tank, a conveying assembly, a reflux assembly, and a defoaming assembly. The conveying assembly connects the circulation tank and the alkali spray tank, used to deliver alkali solution from the circulation tank into the alkali spray tank; it also connects to the circulation tank and the alkali brush tank, used to deliver alkali solution from the circulation tank into the alkali brush tank. The reflux assembly connects to the circulation tank and the alkali spray tank, and also connects to the circulation tank and the alkali brush tank. The defoaming assembly has an inlet and multiple first outlets connected to the inlet. The inlet is connected to the conveying assembly, and the multiple first outlets are spaced apart at the top of the circulation tank, with the first outlets facing the bottom of the circulation tank.

[0039] When there is foam in the circulation tank, the alkaline solution sprayed from the first outlet will spray onto the surface of the foam, causing the foam to burst. This reduces the amount of foam in the circulation tank and prevents the alkaline solution from overflowing from the top of the circulation tank due to excessive foam accumulation, thus saving alkaline solution and reducing waste. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1A schematic diagram of the strip cleaning system in one or more embodiments of this application is shown.

[0042] Reference numerals: 100-Strip cleaning system, 110-Circulation tank, 120-Alkali spray tank, 130-Alkali brush tank, 140-Conveying assembly, 141-First conveying pipe, 142-First pump, 143-Second conveying pipe, 144-Second pump, 150-Return assembly, 151-First return pipe, 152-Second return pipe, 160-Defoaming assembly, 160a-First outlet, 160b-Inlet, 160c-Second outlet, 161-First nozzle, 162-Connecting pipe, 163-Second nozzle, 164-Level gauge, 165-Automatic control valve, 166-Controller, 170-Filter device, 171-Housing shell, 172-Magnetic rod. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] It should be noted that all directional indications in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0047] In related technologies, there is a technical problem of a large amount of foam accumulating in the circulating tank during strip steel cleaning. This application provides a strip steel cleaning system and a cold rolling decarburization annealing unit, which can at least partially solve the technical problem of a large amount of foam accumulating in the circulating tank.

[0048] This application is described below with reference to the accompanying drawings and specific embodiments:

[0049] like Figure 1 As shown, the strip cleaning system 100 includes: a circulation tank 110, an alkali spray tank 120, an alkali brush tank 130, a conveying assembly 140, a reflux assembly 150, and a defoaming assembly 160. The conveying assembly 140 is connected to the circulation tank 110 and the alkali spray tank 120, used to deliver the alkali solution in the circulation tank 110 into the alkali spray tank 120; it is also connected to the circulation tank 110 and the alkali brush tank 130, used to deliver the alkali solution in the circulation tank 110 into the alkali brush tank 130. The reflux assembly 150 is connected to the circulation tank 110 and the alkali spray tank 120, and also connected to the circulation tank 110 and the alkali brush tank 130. The defoaming assembly 160 has an inlet 160b and a plurality of first outlets 160a connected to the inlet 160b. The inlet 160b is connected to the conveying assembly 140. The plurality of first outlets 160a are spaced apart at the top of the circulation tank 110, and the first outlets 160a face the bottom of the circulation tank 110.

[0050] The circulation tank 110 is used to store the alkaline solution for cleaning the steel strip. The steel strip first enters the alkaline spray tank 120 and then the alkaline brush tank 130. It should be noted that the alkaline spray tank 120 is also called an alkaline solution spraying tank, and the alkaline brush tank 130 is also called an alkaline solution washing tank. The structures of the alkaline spray tank 120 and the alkaline brush tank 130 are varied and are known to those skilled in the art, and will not be described in detail in this application.

[0051] The conveying assembly 140 delivers the alkali solution from the circulation tank 110 into the alkali spraying tank 120. Specifically, the alkali solution is sprayed onto the upper and lower surfaces of the strip steel located in the alkali spraying tank 120. A return port is provided at the bottom of the alkali spraying tank 120, and the return assembly 150 is connected to the return port. After the alkali solution falls from the strip steel, it is collected by the alkali spraying tank 120 and returned to the circulation tank 110 for continued use through the return port of the alkali spraying tank 120 and the return assembly 150.

[0052] The conveying assembly 140 also feeds the alkali solution in the circulation tank 110 into the alkali brush tank 130. Specifically, the alkali solution is sprayed onto the upper and lower surfaces of the strip steel located in the alkali brush tank 130. A return port is also provided at the bottom of the alkali brush tank 130, and the return assembly 150 is connected to the return port. After the alkali solution falls from the strip steel, it is collected by the alkali brush tank 130 and returned to the circulation tank 110 for continued use through the return port of the alkali brush tank 130 and the return assembly 150.

[0053] The inlet 160b of the defoaming component 160 is connected to the conveying component 140, allowing a portion of the alkaline solution in the conveying component 140 to be conveyed into the defoaming component 160. The first outlet 160a of the defoaming component 160 is located at the top of the circulation tank 110 and faces the bottom of the circulation tank 110, allowing the alkaline solution to be sprayed towards the bottom of the circulation tank 110. The multiple first outlets 160a are spaced apart, allowing the alkaline solution to be sprayed more evenly, covering a larger area.

[0054] When there is foam in the circulation tank 110, the alkaline solution sprayed from the first outlet 160a will spray onto the surface of the foam, causing the foam to burst, thereby reducing the amount of foam in the circulation tank 110. This prevents the alkaline solution from overflowing from the top of the circulation tank 110 due to excessive foam accumulation, thus saving alkaline solution and reducing alkaline solution waste.

[0055] In some embodiments, the defoaming assembly 160 includes a connecting pipe 162 and a plurality of first nozzles 161. Each first nozzle 161 has a first outlet 160a, and the plurality of first nozzles 161 are spaced apart at the top of the circulation tank 110 and face towards the bottom of the circulation tank 110. One end of the connecting pipe 162 is connected to the conveying assembly 140, and the other end is connected to the first nozzles 161.

[0056] The first nozzle 161 has multiple first outlets 160a, and the connecting pipe 162 has an inlet 160b. A portion of the alkaline solution in the conveying assembly 140 is first conveyed to the connecting pipe 162, then to the first nozzle 161, and finally ejected through the first nozzle 161. The structure of the first nozzle 161 is diverse and is not limited in this application. Under the action of the first nozzle 161, the alkaline solution can be ejected more evenly, covering a larger area, and defoaming the foam in each region, thus helping to improve defoaming efficiency.

[0057] The surface of the strip steel contains impurities and iron powder. After the strip steel is washed with alkaline solution and brushed in alkaline brush tank 130, the impurities and iron filings are mixed in the alkaline solution. The impurities and iron filings flow back into the circulation tank 110, which can easily cause blockages in the circulation tank 110, the conveying assembly 140, and the defoaming assembly 160.

[0058] Therefore, in some embodiments, the strip steel cleaning system 100 further includes a filter device 170, which is installed on the return assembly 150. The alkali solution in the alkali brush tank 130 and / or alkali spray tank 120 is fed into the filter device 170 through the return assembly 150, and then into the circulation tank 110 through the return assembly 150. The filter device 170, installed on the return assembly 150, is used to filter the alkali solution returning to the circulation tank 110, removing iron powder and impurities from the alkali solution, ensuring the continuous and stable operation of the strip steel cleaning system 100.

[0059] The filtration device 170 may be a magnetic filter, membrane filter, centrifuge, or mechanical filter, etc., and is not limited thereto in this application.

[0060] In some embodiments, the defoaming component 160 further has a plurality of second outlets 160c communicating with the inlet 160b, the plurality of second outlets 160c being spaced apart within the housing 171 of the magnetic filter and located at the top of the housing 171 and toward the bottom of the housing 171.

[0061] The structure of the magnetic filter is known to those skilled in the art, comprising a housing 171 and a magnetic rod 172 disposed within the housing 171. The magnetic rod 172 is magnetic and capable of adsorbing magnetic impurities such as iron powder. A second outlet 160c is disposed within the housing 171 of the magnetic filter, located at the top of the housing 171 and facing the bottom of the housing 171, so that the alkaline solution can be sprayed towards the bottom of the housing 171. Foam is generated when the alkaline solution washes the strip surface and drips from the strip surface onto the bottom of the alkaline spray tank 120 and alkaline brush tank 130. This foam enters the magnetic filter through the return assembly 150 and then into the circulation tank 110. When there is foam in the magnetic filter, the alkaline solution sprayed from the second outlet 160c will spray onto the surface of the foam, causing the foam to break, thereby reducing the amount of foam in the magnetic filter and consequently reducing the amount of foam entering the circulation tank 110. The design of multiple second outlets 160c arranged at intervals allows the alkaline solution to be sprayed more evenly, covering a larger area and improving defoaming efficiency.

[0062] In some embodiments, the defoaming assembly 160 includes a connecting pipe 162, a plurality of first nozzles 161, and a plurality of second nozzles 163. The first nozzles 161 have first outlets 160a, are spaced apart at the top of the circulation tank 110, and face towards the bottom of the circulation tank 110. The plurality of second nozzles 163 have second outlets 160c, are spaced apart within the housing 171 of the magnetic filter, and face towards the bottom of the housing 171. One end of the connecting pipe 162 is connected to the conveying assembly 140, and the other end is connected to the first nozzles 161 and the second nozzles 163.

[0063] The first nozzle 161 has multiple first outlets 160a, the second nozzle 163 has multiple second outlets 160c, and the connecting pipe 162 has an inlet 160b. A portion of the alkaline solution in the conveying assembly 140 is first conveyed to the connecting pipe 162, then to the first nozzle 161 and the second nozzle 163, and finally ejected through the first nozzle 161 and the second nozzle 163. The structures of the first nozzle 161 and the second nozzle 163 are varied and not limited in this application. Under the action of the first nozzle 161 and the second nozzle 163, the alkaline solution can be ejected more evenly, covering a larger area, and defoaming the foam in various areas of the outer casing 171, thus helping to improve defoaming efficiency.

[0064] In some embodiments, the second nozzle 163 is positioned away from the magnetic rod 172 to prevent the alkaline solution sprayed from the second nozzle 163 from impacting the magnetic rod 172 and causing magnetic impurities on the magnetic rod 172 to fall off.

[0065] In some embodiments, the defoaming assembly 160 further includes a level gauge 164, an automatic control valve 165, and a controller 166. The level gauge 164 is disposed within the circulation tank 110. The automatic control valve 165 is mounted on the connecting pipe 162. The controller 166 is electrically connected to both the level gauge 164 and the automatic control valve 165, and the controller 166 controls the opening and closing of the automatic control valve 165 based on the level value detected by the level gauge 164.

[0066] The automatic control valve 165 can be a solenoid valve, hydraulic valve, pneumatic valve, etc. The automatic control valve 165 is installed on the connecting pipe 162 and is used to control the opening and closing of the connecting pipe 162. When the automatic control valve 165 is closed, the first outlet 160a and the second outlet 160c will not spray alkaline solution. When the automatic control valve 165 is open, the first outlet 160a and the second outlet 160c will spray alkaline solution. The level gauge 164 is located in the circulation tank 110 and is used to detect the level of foam in the circulation tank 110. When there is less foam accumulation in the circulation tank 110, the level gauge 164 displays a lower level; when there is more foam accumulation in the circulation tank 110, the level gauge 164 displays a higher level. The level gauge 164 feeds back the detected level to the controller 166, which determines whether the level displayed by the level gauge is higher than the set value. If the value is higher than the set value, the controller controls the automatic control valve 165 to open, causing the first outlet 160a and the second outlet 160c to spray alkaline solution for defoaming. If the value is lower than the set value, the controller controls the automatic control valve 165 to close, preventing the first outlet 160a and the second outlet 160c from spraying alkaline solution. The level gauge 164 can be a level sensor, radar level gauge, etc.

[0067] With this design, the strip cleaning system 100 can automatically defoam when there is a lot of foam, preventing the foam from carrying a large amount of alkali solution and overflowing from the top of the circulation tank. When there is less foam, the first outlet 160a and the second outlet 160c will not spray alkali solution and will not perform defoaming treatment, thus reducing system energy consumption.

[0068] In some embodiments, the delivery assembly 140 includes a first delivery pipe 141, a first pump 142, a second delivery pipe 143, and a second pump 144. The first delivery pipe 141 connects to the circulation tank 110 and the alkali spray tank 120. The first pump 142 is installed on the first delivery pipe 141 and is used to pump alkali solution from the circulation tank 110 into the alkali spray tank 120. The second delivery pipe 143 connects to the circulation tank 110 and the alkali brush tank 130. The second pump 144 is installed on the second delivery pipe 143 and is used to pump alkali solution from the alkali brush tank 130 into the alkali brush tank 130. The inlet 160b of the defoaming assembly 160 is connected to either the first delivery pipe 141 or the second delivery pipe 143.

[0069] The inlet 160b of the defoaming component 160 is connected to either the first delivery pipe 141 or the second delivery pipe 143. It should be noted that when the inlet 160b of the defoaming component 160 is connected to the first delivery pipe 141, the first pump 142 provides power to allow the alkaline solution to enter the defoaming component 160. Along the flow direction of the alkaline solution in the first delivery pipe 141, the inlet 160b is connected to the first delivery pipe 141 and is located in front of the first pump 142. When the inlet 160b of the defoaming component 160 is connected to the second delivery pipe 143, the second pump 144 provides power to allow the alkaline solution to enter the defoaming component 160. Along the flow direction of the alkaline solution in the second delivery pipe 143, the inlet 160b is connected to the first delivery pipe 141 and is located in front of the second pump 144.

[0070] In some embodiments, the reflux assembly 150 includes a first reflux pipe 151 and a second reflux pipe 152. The first reflux pipe 151 is connected to the circulation tank 110 and the alkali spray tank 120. The second reflux pipe 152 is connected to the circulation tank 110 and the alkali brush tank 130.

[0071] One end of the first return pipe 151 is connected to the circulation tank 110, and the other end is connected to the alkali spray tank 120. The alkali solution collected in the alkali spray tank 120 flows back into the circulation tank 110 through the first return pipe 151. One end of the second return pipe 152 is connected to the circulation tank 110, and the other end is connected to the alkali brush tank 130. The alkali solution collected in the alkali brush tank 130 flows back into the circulation tank 110 through the first return pipe 151.

[0072] In some embodiments, the filter device 170 is mounted on the second return pipe 152.

[0073] In some embodiments, a filter device 170 is installed on both the first return pipe 151 and the second return pipe 152.

[0074] Based on the same inventive concept, this application also provides a cold rolling decarburization annealing unit, which includes the strip cleaning system 100 described above.

[0075] Since the cold rolling decarburization annealing unit includes the strip cleaning system 100 mentioned above, it naturally has all the beneficial effects of the strip cleaning system 100, which will not be elaborated here.

[0076] The main function of the cold rolling decarburization annealing unit is to perform annealing and coating treatment on grain-oriented silicon steel. Specifically, it can degrease the surface of the grain-oriented silicon steel strip after final cold rolling; it can perform decarburization annealing and primary recrystallization annealing on the strip under a protective atmosphere to reduce the carbon content of the strip to a specified range; it can perform nitriding treatment on the strip; and it can also coat the surface of the strip with an isolation layer such as MgO to form a uniform and dense film of SiO2 on the surface of the steel strip.

[0077] The cold rolling decarburization annealing unit can be divided into an inlet section, an intermediate process section, and an outlet section, arranged in a two-layer configuration. The inlet section mainly includes uncoiling, shearing, riveting, and degreasing processes, continuously supplying strip to the process sections. The strip cleaning system 100 can be located in the degreasing process. The intermediate process section mainly includes a decarburization annealing section, a nitriding section, and cooling, completing the strip processing. The outlet section coats the strip surface with an isolation layer such as MgO, dries and cools it, and completes the strip slitting and coiling.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0079] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0080] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A strip steel cleaning system, characterized in that, include: Circulation tank (110); Alkali spray tank (120); Alkali brush tank (130); A conveying assembly (140) is connected to the circulation tank (110) and the alkali spray tank (120) for conveying alkali solution in the circulation tank (110) into the alkali spray tank (120); it is also connected to the circulation tank (110) and the alkali brush tank (130) for conveying alkali solution in the circulation tank (110) into the alkali brush tank (130); The reflux assembly (150) is connected to the circulation tank (110) and the alkali spray tank (120), and is also connected to the circulation tank (110) and the alkali brush tank (130). The defoaming component (160) has an inlet (160b) and a plurality of first outlets (160a) communicating with the inlet (160b), the inlet (160b) communicating with the conveying component (140), the plurality of first outlets (160a) being spaced apart at the top of the circulation tank (110), and the first outlets (160a) facing the bottom of the circulation tank (110).

2. The strip steel cleaning system according to claim 1, characterized in that, The defoaming component (160) includes: A plurality of first nozzles (161), having first outlets (160a), are spaced apart at the top of the circulation tank (110) and facing the bottom of the circulation tank (110); The connecting pipe (162) is connected at one end to the conveying assembly (140) and at the other end to the first nozzle (161).

3. The strip steel cleaning system according to claim 1, characterized in that, The strip cleaning system (100) also includes a filter device (170) installed on the return assembly (150).

4. The strip steel cleaning system according to claim 3, characterized in that, The filtration device (170) is a magnetic filter.

5. The strip steel cleaning system according to claim 4, characterized in that, The defoaming component (160) also has a plurality of second outlets (160c) communicating with the inlet (160b), the plurality of second outlets (160c) being spaced apart within the housing (171) of the magnetic filter and located at the top of the housing (171) and facing the bottom of the housing (171).

6. The strip steel cleaning system according to claim 5, characterized in that, The defoaming component (160) includes: A plurality of first nozzles (161), having first outlets (160a), are spaced apart at the top of the circulation tank (110) and facing the bottom of the circulation tank (110); A plurality of second nozzles (163), having second outlets (160c), are spaced apart within the housing (171) and facing the bottom of the housing (171); The connecting tube (162) is connected at one end to the conveying assembly (140) and at the other end to the first nozzle (161) and the second nozzle (163).

7. The strip cleaning system according to claim 2 or 6, characterized in that, The defoaming component (160) also includes: A level gauge (164) is installed in the circulation tank (110); An automatic control valve (165) is installed on the connecting pipe (162); The controller (166) is electrically connected to both the level gauge (164) and the automatic control valve (165). The controller (166) controls the opening and closing of the automatic control valve (165) based on the level value detected by the level gauge (164).

8. The strip cleaning system according to any one of claims 1-6, characterized in that, The conveying assembly (140) includes: The first delivery pipe (141) is connected to the circulation tank (110) and the alkali spray tank (120). The first pump (142), installed on the first delivery pipe (141), is used to pump the alkaline solution in the circulation tank (110) into the alkaline spray tank (120); The second delivery pipe (143) is connected to the circulation tank (110) and the alkali brush tank (130). The second pump (144), installed on the second delivery pipe (143), is used to pump the alkali solution in the alkali brush tank (130) into the alkali brush tank (130); The inlet (160b) of the defoaming component (160) is connected to the first delivery pipe (141) or the second delivery pipe (143).

9. The strip cleaning system according to any one of claims 1-6, characterized in that, The recirculation assembly (150) includes: The first return pipe (151) is connected to the circulation tank (110) and the alkali spray tank (120). The second return pipe (152) is connected to the circulation tank (110) and the alkali brush tank (130).

10. A cold rolling decarburization annealing unit, characterized in that, include: The strip cleaning system (100) according to any one of claims 1-9.

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