KR100433955B1 - Device for removing foam in alkali tank of cleaning line - Google Patents

Abstract

It is an object of the present invention to provide an alkali tank defoaming device of a continuous annealing line clean facility that is capable of detecting bubbles quickly and removing them quickly, as well as preventing filter clogging and performing filter cleaning operations safely. have.

Accordingly, the present invention, the detection unit for detecting the flow rate of the foam flows into the filter tank, when the flow rate of the foam is increased by the clogging phenomenon of the filter is operated in accordance with the signal of the detection unit to replace the filter, Alkali of continuous annealing line clean facility consisting of a defoamer dispensing unit for dispensing the defoamer to remove the bubbles of the washing liquid generated in the filter tank, and a collecting unit to remove and collect various foreign substances caught in the filter Provide a tank defoamer.

Description

Device for removing foam in alkali tank of cleaning line

The present invention relates to a clean facility for removing the rolling oil on the surface of the strip before entering the annealing furnace in the stainless bright annealing line, in particular, continuous annealing that can be easily removed to remove the bubbles of the removed rolling oil installed in the alkali tank of the clean facility It is an object of the present invention to provide an alkali tank defoamer of line cleaning equipment.

In general, the cold rolled strip is subjected to a bright annealing process to prevent deoxidation and loss of metallic luster on the steel surface. Bright annealing pretreatment is followed by a degreasing process to remove the rolling oil on the strip surface.

In other words, the strip after welding is passed through a clean facility for degreasing. Alkali tank that chemically decomposes the strip surface, and rinse tank and dryer that wipes the alkaline liquid on the strip with hot water at 80-90 ℃. The strip surface is cleaned as it passes.

1 is a perspective view showing an alkali tank in the above clean facility, the cleaning liquid powder having a nozzle 104 is formed to spray the cleaning solution mixed with the alkaline liquid and the cleaning liquid to the surface of the strip 200 to clean the surface The cleaning tank 100 is installed in contact with the surface of the pipe 102 and the strip 200 to remove the foreign matter, and is connected to the cleaning tank 100 and the distribution pipe 108 installed at the bottom of the cleaning tank 100, and the cleaning liquid is disposed therein. It consists of a filter tank 110 is provided with a filter 112 for filtering, it is designed to recycle the cleaning liquid filtered in the filter tank 110 through the return line 120.

However, the conventional structure has a problem in that a large amount of foam is generated in the process of filtering the washing liquid is caused to flow back to the washing tank through the distribution pipe.

As such, when a large amount of foam is generated due to clogging of the filter tank or deterioration of the effectiveness of the filter, the antifoaming agent is first administered through the distribution pipe, but the foam is removed immediately after the antifoaming agent is administered, but the effectiveness of the washing solution is deteriorated. There is a problem that is increased.

In addition, in order to remove foreign substances caught in the filter, such as a slipper brush needle, it is necessary to remove the filter after opening the cover that covers the upper part of the filter tank by loosening the bolt, so it takes a lot of time and effort, and there is a risk of safety accident caused by alkaline solution. The disadvantage is high.

Accordingly, the present invention has been made in order to solve the above problems, it is possible to remove the rapid detection by detecting it when the bubble is generated, as well as to clean the continuous annealing line to prevent filter clogging and filter cleaning work safely Provide an alkali tank defoamer of the installation.

1 is a perspective view showing an alkali tank of a general clean facility,

Figure 2 is a perspective view showing a bubble removing device of the alkali tank according to the present invention,

3 is a cross-sectional view of the defoamer according to the present invention.

Explanation of symbols on the main parts of the drawings

10: detection rod 12: detection sensor

20: filter 22, 24, 26: rotary roller

28,48: drive motor 30: tension roller

32: blocking plate 34: plate

36: hole 38: pulse gauge

40: air pipe 42: nozzle

44: 46 46: screw

50: discharge pipe 60: container

62: nozzle tube 64: solenoid valve

70: cover 80: controller

The present invention for realizing the above object, the detection unit for detecting the flow rate of the foam flowed into the filter tank, when the flow rate of the foam is increased by the clogging phenomenon of the filter is operated in accordance with the signal of the detection unit filter It consists of a replacement part for replacing the defoamer, an antifoaming agent for dispensing the antifoaming agent to remove the bubbles of the washing liquid generated in the filter tank, and a collecting part for separating and collecting various foreign substances caught in the filter. .

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing an alkali tank of a general clean facility, Figure 2 is a perspective view showing a bubble removing device of the alkali tank according to the invention, Figure 3 is a cross-sectional view of the bubble removing device according to the present invention.

According to the above-described drawings, the filter tank 110 is installed with the filter 20 inclined therein, and is divided into a dirty side D and a clean side C with respect to the filter 20, and the dirty side of the filter tank ( D) The side surface is connected to the distribution pipe 108 installed on the bottom of the washing tank 100, the upper part is provided with a sensing unit and antifoam injection unit.

In addition, the clean side C of the filter tank has a structure in which a return line 120 for recycling the clean cleaning liquid filtered by the filter 20 is connected.

Here, the sensing unit of the present invention is installed on the dirty side (D) upper portion of the filter tank 110 and installed downward into the filter tank 110, each of the plurality of sensing rods 10 and different sensing rods 10, each sensing rod 10 When the bubble comes in contact is made of a sensor 12 to detect it.

Three sensing rods 10 are installed downward from the sensing sensor 12, and the height of the bubbles is lowered by lowering the heights from the bottom of the filter tank 110 to the ends of the respective sensing rods 10, L, It can be divided into medium (M) and high (H).

On the other hand, the filter replacement portion is integrally connected to the front end and the end to form a single closed curve filter 20, the bottom of the filter tank 110 and the top of the clean side (C), respectively, and the filter 20 is spread outward The rotating rollers 24, 26 and 22 are connected to the rotating shaft of one of the rollers 22, the rotating roller 22 is composed of a drive motor 28 for rotating the rotary roller 22.

Accordingly, when the driving motor 28 is operated, the position of the filter 20 spanning the rotating rollers 22, 24, and 26 is moved and replaced with a new filter 20.

The drive motor 28 is connected to the rotary roller 22 protruding upward from the filter tank 110, and the rotary rollers 22 and 26 installed on the remaining bottom are constituted by self-rotating idle rolls. In addition, as shown in FIG. 2, a tension roller 30 is installed between the clean side C upper rotating roller 22 and the lower rotating roller 24 of the filter tank 110, and the tension roller 30. The outer surface of the filter 20 is covered so that the tension of the filter 20 can be maintained.

Here, the blocking plate 32 is installed at the lower portion of the dirty side D of the filter tank 110 to the upper portion of the rotary roller 22 so that the washing liquid introduced into the dirty side D of the filter tank 110 may filter the filter 20. To prevent the flow to the clean side (C) immediately without passing through.

Also, in order to prevent the filter 20 from falling down between the clean side (C) upper rotating roller 22 and the dirty side (D) lower rotating roller 26, which will serve as the actual filter 20 ring. (20) The inclined support plate 34 is installed at the lower part, and a plurality of holes 36 are formed on the surface of the plate 34 at regular intervals so that the filtered cleaning liquid flows into the clean side C.

According to the present invention, the filter 20 replacement part may be provided with a pulse gauge 38 on the rotation shaft of the upper rotating roller 22 of the clean side C on which the driving motor 28 is installed, according to the amount of rotation of the driving motor 28. By allowing the movement amount of the filter 20 to be sensed, the movement amount of the filter 20 can be accurately controlled.

On the other hand, the collecting unit is air installed in the longitudinal direction of the rotary roller 22 inside the filter 20 of the lower side of the upper rotary roller 22 of the clean side (C) to remove the brush chip and other foreign matter attached to the filter 20 Clean side (C) side of the nozzle (40) and the filter tank (110) for injecting air from the inner surface of the filter (20) to a predetermined interval along the pipe (40) and the air pipe (40) The container 44 for receiving the foreign matter separated from the filter 20 is installed in the upper portion, the rotary screw 46 is installed in the longitudinal direction on the bottom surface of the container 44, the container 44 is installed on one side of the screw 46 ) Is composed of a drive motor 48 for rotating), a discharge pipe 50 installed downward on one side of the container 44, and a foreign matter storage container 52 disposed under the discharge pipe 50.

Here, the inner end of the container 44 is bent inward at a predetermined angle so that foreign matters separated from the filter 20 according to the air injection are guided to the container 44 so that foreign matters fall into the filter tank 110. To prevent it.

In addition, an antifoaming agent is installed in the upper part of the filter tank 110, for this purpose, a container 60 containing the antifoaming agent is installed in the upper side of the dirty side (D), and the filter tank 110 is installed at the bottom of the container 60. One side of the nozzle tube 62 connected to the c) is configured to install a solenoid valve 64 that is operated by a timer to open and close the nozzle tube 62 to administer the antifoaming agent into the filter tank 110.

In addition, it is preferable to install a transparent tube connecting the upper end and the lower end outside the container 60 so that the level of the antifoaming agent can be confirmed.

Here, the reference numeral 70 of FIG. 3 is rotatably mounted to the upper portion of the filter tank 110 by a hinge axis to facilitate maintenance, and to open the upper rotating roller 22 portion of the filter tank 110. It is a cover.

According to one embodiment of the present invention, the solenoid clean side (C) 64 installed in all the drive motors 28 and 48 and the nozzle tube 62 of the container 60 is a controller 80 to which the sensor signal is applied. The control operation of the present invention will be described below according to the control operation of the controller 80.

The cleaning liquid that played a cleaning role in the cleaning tank 100 flows into the dirty side D of the filter tank 110 through the distribution pipe 108, and is installed up to the rotary roller 26 at the bottom of the filter tank 110. The blocking plate 32 is prevented from immediately flowing the cleaning liquid to the clean side (C).

Therefore, when the washing liquid continues to flow into the filter tank 110, the filter 20 is inclined upwardly to the blocking plate 32 and is introduced into the clean side C of the filter tank 110.

On the other hand, when the foam on the incoming washing liquid reaches the low (L) position is detected by the sensor 12 while touching the end of the sensing rod 10 closest to the bottom of the clean tank of the sensing rod 10 and the detection signal Will be sent to the controller 80.

In this case, when the foam position of the washing liquid is low (L), no special action is required, and the washing liquid flowing into the dirty side (D) is continuously filtered through the filter 20 and introduced into the clean side (C). .

As the cleaning solution continues to flow in the filter 20, the brush chip or various foreign substances contained in the cleaning solution are blocked by the filter 20, thereby blocking the filter 20, thereby lowering the filter 20 ring efficiency. Dirty side (D) washing liquid height is getting higher.

When the dirty side (D) washing liquid height is increased and the foam on the washing liquid reaches the medium (M) and touches the corresponding sensing rod 10, it is detected by the sensing sensor 12, and the controller 80 receiving the signal receives a filter ( 20) it is determined to decrease the ring efficiency to replace the filter 20.

That is, the drive motor 28 is operated in accordance with the signal from the controller 80, the upper rotary roller 22 is rotated, the filter 20 is spread, and is in close contact with each rotary roller (22, 24, 26) The filter 20 is rotated.

Therefore, the filter 20 between the upper rotating roller 22 and the dirty side (D) lower roller 26, which is currently filtering, moves in accordance with the rotating roller 22 to rotate the upper rotating roller 22 and the clean side. (C) It comes between the lower roller 24, the new filter 20 at the bottom is positioned between the upper rotary roller 22 and the dirty side (D) lower roller 26 to act as the filter 20. .

Here, the movement amount of the filter 20 is precisely controlled by the pulse gauge 38, the pulse gauge 38 for detecting the movement amount of the filter 20 according to the rotation amount of the rotary roller 22 is shown in FIG. As described above, when the a position of the filter 20 is moved to the b position, the signal is applied to the controller 80, and the controller 80 stops the driving motor 28 in accordance with this signal, so that the filter 20 is exactly required. Only move as much as possible.

Along with this, the collecting unit is operated to remove foreign substances on the used filter 20.

That is, the controller 80 receives the signal from the detection sensor 12 when the cleaning liquid reaches the medium (M), and at the same time replaces the filter 20 and injects air into the air pipe 40, the air pipe 40 Air is injected to the surface of the filter 20 to be replaced through the nozzle 42 formed in the).

Since the air pipe 40 is installed inside the filter 20, the air is injected from the inside of the filter 20 to the outside to drop foreign substances from the filter 20 to the outside of the filter 20. Foreign matter falling from the filter 20 is collected by falling into the container 44 installed on the filter tank 110 side.

Therefore, the filter 20 which is moved according to the operation of the driving motor 28 is removed by the air pipe 40 and the nozzle 42 positioned under the upper rotary roller 22 to move in a clean state. will be.

The time point at which air is stopped is controlled by the pulse gauge 38, which is the same as the time point at which the movement of the filter 20 is stopped.

As described above, when various foreign matters such as brush chips removed from the filter 20 are collected in the collecting container 44, the driving motor 48 installed in the collecting container 44 is operated to operate the screw 46 connected to the driving motor 28. It is rotated, the foreign matter is transferred to the discharge pipe 50 along the screw 46 is discharged to the reservoir 52 through the discharge pipe 50.

On the other hand, even after replacing the filter 20 as described above, if the cleaning liquid continues to flow into the dirty side (D) of the filter tank 110 and the foam on the cleaning liquid touches the detection rod 10 of the high (H) point, the detection sensor ( 12) detects this and applies a signal to the controller 80, the controller 80 determines that the foam is generated in the washing liquid to administer the antifoaming agent to the washing liquid.

That is, the timer 82 is operated according to the signal of the controller 80 to open the solenoid valve 64 installed in the nozzle tube 62 of the container 60 for a predetermined time. Therefore, the defoaming agent stored in the container 60 is sprayed on the cleaning liquid inside the filter tank 110 through the nozzle tube 62 to remove the bubbles.

When the predetermined time passes by the timer 82, the solenoid valve 64 returns to close the nozzle tube 62 to stop the defoaming agent administration.

In addition, when the foam is high (H) state to prevent an emergency, the warning light to blink in the central cab, such that the worker directly open the cover 70 of the filter tank 110 to determine whether there is any abnormality and determine whether or not to take action. do.

As described above, according to the alkali tank defoamer of the continuous annealing line cleaning equipment according to the present invention, it is possible to reduce the cost by reducing the frequency of the antifoaming agent by preventing the clogging of the filter and preventing the foaming caused by the decrease in the filter efficiency. have.

Claims (3)

(Correction) In the alkali tank of the annealing furnace cleaning equipment in which the filter 20 is inclined inside to recycle the cleaning liquid filtered by the filter through the return line 120. It is installed on the filter tank 110 of the dirty tank (D) upper side of the alkali tank and installed downward into the filter tank and detects a plurality of sensing rods 10 having different heights and foams of the cleaning liquid on each sensing rod. A detection unit consisting of a detection sensor 12 capable of being made; The filter 20, which is connected to the front end and the end integrally to form a single closed curve, and the rotary roller 22 which is respectively installed on both the bottom of the filter tank and the upper side of the clean side (C), and the filter 20 is spread outward, A filter replacement part consisting of a driving motor 28 connected to a rotating shaft of one roller of each rotating roller to rotate the rotating roller; Alkaline tank defoaming device of the continuous annealing line clean facility, comprising a. (Correction) The method of claim 1, wherein in order to remove the brush chip and other foreign matter attached to the filter 20, installed in the longitudinal direction of the rotary roller inside the filter 20 of the lower side of the upper rotary roller 22 of the clean side (C). The air pipe 40 is installed at a predetermined interval along the air pipe, the nozzle 42 for injecting air from the inner side of the filter to the outside, the foreign matter is installed on the upper side of the clean side of the filter tank is separated from the filter Receiving container 44, the rotary screw 46 is installed in the longitudinal direction on the bottom of the container, the drive motor 48 for rotating the screw is installed on one side of the container, discharge pipe 50 is installed downward on the bottom surface of the container And, Alkali tank defoaming device of the continuous annealing line cleaning equipment, characterized in that further comprises a collecting unit consisting of a foreign matter storage container 52 placed under the discharge pipe. (Correction) The method according to claim 1 or 2, wherein the filter tank 110 is installed on the dirty side (D), the container 60 containing an antifoaming agent therein, and is installed on the bottom of the container and connected to the filter tank. It is characterized in that it further comprises a defoaming agent dispensing unit consisting of a solenoid valve 64, which is installed on the nozzle tube 62, one side of the nozzle tube to open and close the nozzle tube to administer the antifoaming agent into the filter tank. Alkaline tank defoamer for continuous annealing line cleaning equipment.