KR20180072461A - Apparatus of neutralizing of gas leakage and Method of the same - Google Patents

Abstract

Disclosed are an apparatus for neutralizing leaked gas, which neutralizes gas leaked from a storage tank in which a harmful solution is stored, and a neutralization method thereof. The apparatus for neutralizing the leaked gas according to an embodiment of the present invention includes a detection sensor detecting the leakage gas leaking from the storage tank, a spray device spraying water in the form of mist, and a suction device sucking the mist.

Description

TECHNICAL FIELD [0001] The present invention relates to a leakage gas neutralization apparatus and a neutralization method thereof,

The present invention relates to a leaning gas neutralization apparatus and a neutralization method thereof, and more particularly, to a leaning gas neutralization apparatus and method for neutralizing a leaking gas in a storage tank in which a harmful solution is stored.

Since stainless steels generate oxidation scales on the surface in processes such as hot rolling and heat treatment, these scales are completely removed in the pickling process, and passivation treatment is applied to impart corrosion resistance to stainless steel to produce products with good surface quality. .

This pickling process uses a method in which a high-pressure spray is sprayed on a scale layer formed on a surface of a strip in a salt bath, and in the sulfuric acid tank, the salt of the residue formed on the edges of the strip is neutralized. The acid used in the hydrolysis process after washing in the electrolytic tank includes nitric acid, hydrofluoric acid, sulfuric acid, hydrochloric acid, and phosphoric acid. These hydrocarbons are used singly or in mixed form, and a mixture of nitric acid and hydrofluoric acid is generally used .

Since hydrofluoric acid has low boiling point and high toxicity, caution must be taken when using it, and hydrochloric acid and hydrofluoric acid are often used as a mixture with nitric acid because they erode not only the scale but also the metal substrate itself.

In the pickling process, the strip is passed through the mixing bath to perform a pickling process. The mixed bath is supplied with the mixed acid stored in the mixed acid storage tank, the circulating water supplied through the fresh water line is filled up, and the operation is carried out at the proper concentration with the temperature raised by the steam.

1 is a view showing a conventional noxious gas storage tank 10.

On the other hand, the noxious gas storage tank 10 may be cracked due to external impact or strong causticity of mixed acid mixed with nitric acid and hydrofluoric acid stored therein. When such cracks (11) are generated, leakage of nitric acid and hydrofluoric acid stored in the inside causes not only pollution of the surrounding environment but also causes damage to human life.

Conventionally, when a crack 11 is generated in the storage tank 10 and the mixed acid leaks out, the leaking solution is confined in the protection dam 20, and the worker wearing the special protection equipment on the whole body while the solution is continuously discharged Water is sprayed to remove toxic fumes, and a neutralizing liquid is injected into the protection dam 20 to neutralize the leaking solution.

However, since such a series of neutralization processes take a long time, the toxic substances leaked to a wide area cause environmental pollution, and particularly in a country where the atmosphere is very stable, temperature and humidity conditions are satisfied, Causing serious problems that would cause damage to residents and farms.

Korean Patent Laid-Open No. 10-2001-0079251 discloses a method for treating hydrofluoric acid wastewater discharged from a semiconductor factory.

Korean Patent Publication No. 10-2001-0079251 (Aug. 22, 2001) Korean Registered Utility Model No. 20-0250718 (Oct. 04, 2001)

The embodiment of the present invention is capable of easily checking and confirming the state of leakage even in a cabin because the storage tank for storing toxic chemicals in the steel producing industry can not easily be inspected by a worker, And to provide a leaking gas neutralization device capable of preventing the occurrence of fumes and quickly carrying out emergency measures until neutralization.

To provide a leakage gas neutralizing device that has a structure for circulating a neutralized liquid and neutralizes the leaked gas while forming a shielding film so that the leaked gas is prevented from diffusing to the outside when gas is leaked from the storage tank storing the acid solution do.

The present invention also provides a leakage gas neutralization device that can monitor and remotely monitor and automate the process of automation to automatically neutralize fumes and toxic substances when a toxic fume occurs.

According to an aspect of the present invention, there is provided a gas sensor comprising: a sensing sensor for sensing leakage gas leaking from a storage tank; A spray device for spraying liquid in the form of mist; And a suction device for sucking the mist, may be provided.

In addition, the injection device may spray liquid in the form of mist or spray a neutralized liquid.

In addition, the injector is provided with a water supply line to which water is supplied, a neutralization liquid supply line to which neutralization liquid is supplied, a water control valve to open and close the water supply line, and a neutralization liquid control valve A main supply line communicating with the water supply line and the neutralization liquid supply line, a main control valve opening and closing the main supply line, and a spray head communicating with the main supply line.

The spray device may further include an air supply line for supplying air and an air control valve for opening and closing the air supply line, and the main supply line and the air supply line may join and communicate with the spray head.

The injector may be rotatably mounted on a stationary frame. The injector may be coupled to the cylinder through a link member, and may be rotatable up and down according to the elongation of the cylinder.

In addition, the suction device may be disposed in the same line on the injection device and the storage tank, and may be located on the opposite side of the injection device with respect to the storage tank.

In addition, the suction device may include a suction fan rotating by a motor and a screen for condensing the mist containing the fume.

Further, the screen may be provided with a plurality of mesh sheets.

In addition, the suction fan may include a first suction fan positioned in front of the screen and a second suction fan located behind the screen.

The suction device further includes a front drain line provided at a lower portion of the screen for guiding the solution dripped from the screen to the pit and a rear drain line for guiding the solution dripped from the second suction fan to the pit can do.

In addition, a plurality of frames and a surveillance camera may be installed around the storage tank, and the sensing sensor may be installed together with the frame on which the surveillance camera is installed.

The protection dam further includes a protection dam which is provided to house the storage tank therein and stores the solution leaking from the storage tank, and the inner wall of the protection dam is provided with a float floating by the liquid stored in the protection dam And a switch connected to the float and generating a signal when the floating body floats.

In addition, the storage tank stores a hydrofluoric acid-containing chemical used for pickling, which separates the scale attached to the strip after annealing annealing of stainless steel (STS), and the sensor can detect the fume of the harmful chemical have.

According to another embodiment of the present invention, the detection sensor senses the leakage gas leaking from the storage tank, and the injection device sprays the liquid in mist form to collect the leaking gas, and the inhalation device separates the mist The spray device may be provided with a leakage gas neutralization method of spraying a neutralizing liquid around the storage tank after spraying the mist.

The control unit may spray the mist when it is determined that the leak gas is detected through the signal received from the detection sensor, and the control unit may operate the suction device at the same time as the mist is sprayed or in an earlier time to suck the mist , The controller may stop the mist spraying of the sprayer and spray the neutralizing liquid if it is determined that the leakage gas has been reduced below the reference range.

The leakage gas neutralizing apparatus according to the embodiment of the present invention can minimize damage by suppressing the occurrence of toxic chemical fumes automatically and quickly and safely from a remote place.

In addition, it is possible to minimize fouling around the fume by early blocking of the fume immediately when the toxic material leaks out of the tank.

In addition, it is possible to prevent the gas leaking from the storage tank from diffusing to the outside, and to neutralize the leaking gas with the neutralizing liquid.

1 is a view showing a conventional noxious gas storage tank.
2 is a view showing a leaking gas neutralizing apparatus according to an embodiment of the present invention.
3 is a view showing the neutralizing device in detail.
4 is a view showing the suction device in detail.
5 is a view showing a state in which the detection camera or the detection sensor senses leakage of noxious gas.
6 is a view showing a state in which the neutralization apparatus sprays mist and the suction apparatus sucks the mist.
7 is a view showing a state in which the neutralizing device applies a neutralizing liquid.
FIG. 8 is a flowchart showing a leakage gas neutralization method according to an embodiment of the present invention.

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

The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below and may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

2 is a view showing a leaking gas neutralization apparatus 100 according to an embodiment of the present invention.

Referring to FIG. 2, the storage tank 10 may store toxic chemicals such as hydrofluoric acid or sulfuric acid. The storage tank 10 is a container having a space capable of storing an acid or a base solution therein, and may be provided in a cylindrical shape, for example. And the acid or base solution stored in the storage tank 10 can be supplied through the injection line 30 and injected into the required process.

For example, the storage tank 10 may store a hydrofluoric acid (HF) 55% hazardous chemical that uses a cold rolled coil of stainless steel (STS) for pickling to separate the scale attached to the strip after annealing. Hydrofluoric acid has a high reactivity and is not easily ionized and is classified as a weak acid. However, when it reacts with moisture in the air due to a strong hydrogen bonding force, it causes a large explosion, It is preferable that the storage tank 10 storing hydrofluoric acid is made of synthetic resin (polyethylene).

An injection valve 31 is provided in the injection line 30 to control the opening and closing of the injection line 30.

The storage tank (10) can be received inside the protection dam (20). The protection dam 20 is installed around the storage tank 10 so that the toxic chemicals leaking from the storage tank 10 and the neutralizing liquid used for neutralizing the leakage can be prevented from leaking to the outside. The protection dam 20 may be provided to have a capacity of about 110% or more of the capacity of the storage tank 10. [

The leaking gas neutralization apparatus 100 according to the embodiment of the present invention may include a surveillance camera 110 for detecting when leakage of noxious gas occurs due to the corrosion of the storage tank 10 or a crack 11 due to external impact, A spray device 120 for spraying the mist and the neutralizing liquid, and a suction device 140 for sucking the mist.

The surveillance camera 110 and the detection sensor 112 may be supported by a fixed frame 111 installed outside the protection dam 20. The surveillance camera 110 is installed on the upper part of the fixed frame 111 and can be installed to be rotatable up and down. Preferably, the surveillance camera 110 can be installed to be rotatable up, down, left, and right. The surveillance camera 110 can generate and transmit a video signal around the storage tank 10 and the protection dam 20.

The detection sensor 112 is disposed below the surveillance camera 110. When a toxic chemical leaks through the crack 11 of the storage tank 10, the detection sensor 112 detects the leak and generates a signal indicating that the toxic chemical has leaked to the control unit 113 . For example, the sensing sensor 112 may sense fumes of toxic chemicals.

When the fume is removed, the detection sensor 112 detects the fume and generates a signal indicating that the fume has been removed, and transmits the signal to the controller 113. When the harmful chemical is neutralized, the detection sensor 112 detects the neutralization and generates a signal indicating neutralization to the control unit 113.

The detection sensor 112 may be installed at the upper end of the stationary frame 111 to detect gas as it leaks from the storage tank 10.

A plurality of surveillance cameras 110 and sensing sensors 112 may be installed around the protection dam 20. For example, three securing frames 111 are installed at intervals of 120 degrees around the protection dam 20, and a surveillance camera 110 and a sensing sensor 112 may be installed in each securing frame 111 .

3 is a view showing the injection device 120 in detail.

3, the spraying apparatus 120 includes a spraying head 130 spraying water or a neutralizing liquid upon leakage of harmful substances, a main supply line 125 connected to the spraying head 130, A water supply line 123 communicating with the main supply line 125 for supplying water and a water control valve 126 for controlling the opening and closing of the water supply line 121. The main control valve 126 controls the opening / A neutralizing liquid control valve 124 for controlling the opening and closing of the neutralizing liquid supply line 123, And an air control valve 135 for controlling the opening and closing of the air supply line 134. The air supply line 134 is connected to the air supply line 134,

The water supply line 125 and the neutralization liquid supply line 123 may be branched downstream of the main supply line 125 and the main supply line 125 may be provided as a flexible hose.

The main control valve 126 is opened when it receives the open signal from the control unit 113 after the leakage of the toxic substance is detected and starts to supply the water or the neutralizing liquid and when it receives the closing signal from the control unit 113, Can be cut off.

The water control valve 122 and the air control valve 135 are opened when the leakage of the toxic substance is detected and received an open signal from the control unit 113 to start the supply of water and air and the removal of the fumes of the harmful substances is completed When the control unit 113 receives the close signal, it can close the supply of water and air.

The neutralizing liquid control valve 124 is opened when the removal of the fume is completed and the opening signal is received from the controller 113 to start the supply of the neutralizing liquid and when the neutralization of the harmful material is completed and the closing signal is received from the controller 113, So that the supply of the neutralizing liquid can be cut off.

The neutralizing liquid may include both an acid neutralizing liquid and a basic neutralizing liquid. For example, if the hazardous chemical is acidic, the basic neutralizing liquid is supplied, and if the toxic chemical is basic, the acid neutralizing liquid may be supplied.

The spray head 130 is formed with a plurality of spray holes through which mist or neutralized liquid is sprayed. The spray head 130 is connected to the main supply line 125 and the air supply line 134. A water spray nozzle (not shown) and an air spray nozzle (not shown) may be installed in the spray head 130 to induce mist spray. When water and air are supplied simultaneously through the water spray nozzle and the air spray nozzle, the mist can be sprayed through the spray hole.

The mist sprayed through the spray head 130 can be used to collect fumes around the storage tank 10. [

The spray head 130 is installed on the upper portion of the fixed frame 127 and can be installed to be rotatable up and down about the rotary shaft 128. Preferably, the spraying head 130 can be installed to be rotatable up, down, left, and right.

The spray head 130 is connected to the cylinder 131 installed on the upper portion of the fixed frame 127 via the link member 132. The cylinder 131 may be installed so as to be rotatable up and down about the rotation shaft 133. For example, when the cylinder 131 is elongated, the link member 132 can push down the spray head 130 and rotate it downward. Conversely, when the cylinder 131 is contracted, the link member 132 can pull the spray head 130 and rotate it upward.

In the meantime, although one injection device 120 is installed around the storage tank 10, a plurality of the injection devices 120 may be installed around the storage tank 10. For example, four can be installed around the storage tank 10 at intervals of 90 degrees.

4 is a view showing the suction device 140 in detail.

4, the suction device 140 sucks the mist sprayed from the spray device 120 and guides the mist to the wastewater treatment device 150 through the suction line 147. As shown in FIG. The suction device 140 may be installed on the opposite side of the storage tank 10 at a position that is aligned with the spray head 130 with respect to the storage tank 10. The mist sprayed from the spray head 130 can be sucked into the suction port 141 of the suction device 140 on the opposite side after the fume around the storage tank 10 is collected.

A first suction fan 142 for guiding the suction of mist capturing the fume and a first motor 143 for providing a driving force for rotating the first suction fan 142 may be installed in the suction port 141. The suction port 141 may be connected to a screen box 146 on which a screen 144 for condensing mist that has collected fumes is installed.

The screen 144 may be provided as a porous mesh sheet. And a plurality of screens 144 may be stacked. And the screen 144 may include a zigzag shape to increase the unit area. For example, the screen 144 may be formed by stacking a plurality of metal mesh sheets vertically.

The screen 144 may be exchangeable. The screen box 146 may be rotatably coupled to an inspection window 146a provided to be openable and closable. And the inspection window 146a is provided in a transparent manner so that the operator can visually confirm the state of the screen 144. [ A handle 145 is provided on one side of the screen 144 so that it can be easily detached from the screen box 146.

Further, a forward drain line 148 connected to the pit 149 is connected to the lower portion of the screen 144. The solution containing the fumes that fall out of the screen 144 is directed to the forward drain line 148 and enters the pit 149 through the forward drain line 148 and is directed to the wastewater treatment device 150.

For example, the front drain line 148 may be disposed below the suction line 147 that is connected to the downstream side of the screen box 146. Thus, the solution dripping from the screen 144 can be introduced into the forward drain line 148 by its own weight.

In order to maximize the suction of the mist trapped by the fume, a second suction fan 151 and a second motor 152 for providing driving force for rotating the second suction fan 151 may be installed at the end of the suction line 147.

An air drain line 153 through which the sucked air flows is connected to the upper portion of the second suction fan 151. The air passing through the second suction fan 151 may include mist, may include fumes, or may be pure air from which both the mist and the fume are removed. However, since the air introduced through the air drain line 153 may contain harmful substances, the air drain line 153 is guided to the wastewater treatment device 150.

A rear drain line 154 connected to the pit 149 is connected to a lower portion of the second suction fan 151. The solution containing the fumes condensed and dripped in the second suction fan 151 is led to the rear drain line 154 and enters the pit 149 through the rear drain line 154 to the wastewater treatment device 150 Guidance.

For example, the rear drain line 154 may be disposed at the bottom of the case surrounding the second suction fan 151. Therefore, the solution that is dripped from the second suction fan 151 can be introduced into the rear drain line 154 by its own weight.

A protective dam drain line 21 for guiding collected harmful substances and neutralized liquid to the wastewater treatment device 150 may be connected to the lower portion of the protection dam 20. Further, a protection dam control valve 22 for opening and closing the protection dam drain line 21 may be further provided.

A float 160 and a switch 161 connected to the float 160 may be installed on the protection dam 20. When the water level increases due to the harmful substances and the neutralized liquid in the protection dam 20, the float 160 floats by the buoyant force, the float 160 floats and operates the water position 161 connected thereto, The signal generated by the damper 161 is transmitted to the control unit 113 so as to know that the protection dam 20 has reached the acceptance limit.

In the meantime, although one suction device 140 is installed around the storage tank 10, a plurality of suction devices 140 may be installed around the storage tank 10. For example, four can be installed around the storage tank 10 at intervals of 90 degrees.

Next, an operation of the leakage gas neutralization apparatus 100 according to an embodiment of the present invention will be described with reference to FIG. 5 to FIG.

5 is a view (200) showing a state in which the detection camera 110 or the detection sensor 112 detects the leakage of noxious gas.

Referring to FIG. 5, when the leakage gas neutralization apparatus 100 generates cracks 11 or the like in the storage tank 10 and fumes are generated therefrom, the detection sensor 112 immediately detects harmful gas And sends a signal to the control unit 113 to notify the leak. Or the operator checking the surveillance camera 110 may recognize the leaking situation and control the operation thereafter.

FIG. 6 is a view (210) showing a state in which the spraying device 120 sprays mist and the suction device 140 sucks the mist.

Referring to FIG. 6, the control unit 113 executes the fume removal mode so that fumes of toxic chemicals are not scattered to the atmosphere.

In the fume removal mode, the control unit 113 opens the water control valve 122 and the air control valve 135, and the water and the air combined in the spraying head 130 are sprayed in a mist form from the head nozzle to collect the fume . At this time, the neutralizing liquid control valve 124 is closed.

At the same time, the controller 113 activates the first motor and the second motor 143, 152 of the suction device 140 located opposite to the storage tank 10. When the first and second suction fans 142 and 151 are operated, the mist absorbing the fume is sucked into the suction port 141, the mist is attached to the screen 144 and dripped to the front drain line 148, 2 sucking fan 151 and flows into the rear drain line 154 and the air passing through the second suction fan 151 flows into the air drain line 153. [ The harmful substances introduced through the first to fourth drain lines 148, 153, and 154 are led to the wastewater treatment device 150.

7 is a view showing a state in which the spraying device 120 applies a neutralizing liquid (220).

When the mist is sprayed and the fume removal is completed, the control unit 113 switches to the neutralization mode. At this time, the detection sensor 112 can send a signal to the control unit 113 that the fume is no longer detected.

The control unit 113 closes the water control valve 122 and the air control valve 135 and opens the neutralizing liquid control valve 124 to spray the neutralizing liquid through the spraying head 130. [ The neutralized liquid sprayed through the spray head 130 is sprayed around the crack 11 of the storage tank 10 and is received in the protection dam 20.

When the level of the protective dam 20 increases due to the increase of the toxic chemicals leaking from the storage tank 10, the float 160 rises up to operate the switch 161, The control valve 22 is opened to lead the liquid stored in the protection dam 20 to the wastewater treatment device 150 through the protection dam drain line 21. [

The control unit 113 determines that neutralization is completed when a predetermined amount of neutralized liquid is sprayed and opens the protection dam control valve 22 to open the neutralized liquid stored in the protection dam 20 through the protection dam drain line 21 To the waste water treatment apparatus 150 (230).

The operation shown in Figs. 5 to 7 proceeds automatically and the operator can check in real time while checking with the surveillance camera 110 in the cab.

On the other hand, the neutralized liquid applied in Fig. 7 may function as a barrier. The neutralizing liquid sprayed from the spraying device 120 to the periphery of the storage tank 10 can form a shielding film to prevent the fume from diffusing to the outside.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, You will understand. Accordingly, the true scope of the invention should be determined only by the appended claims.

10: storage tank, 11: crack,
20: Protected dam, 21: Protective dam drain line,
22: Protection dam control valve, 30: Infusion line,
31: injection valve,
100: Leakage gas neutralizing device, 110: Surveillance camera,
111: fixed frame, 112: detection sensor,
113: control unit, 120: injection device,
121: water supply line, 122: water control valve,
123: neutralized liquid supply line, 124: neutralized liquid control valve,
125: main supply line, 126: main control valve,
127: fixed frame, 128: rotary shaft
130: atomizing head, 131: cylinder,
132: link member, 133: rotating shaft,
134: air supply line, 135: air control valve,
140: Suction device, 141: Suction port,
142: first suction fan, 143: first motor,
144: screen, 145: handle,
146: screen box, 146a: inspection window,
147: suction line, 148: front drain line,
149: feet, 150: wastewater treatment device,
151: second suction fan, 152: second motor,
153: air drain line, 154: rear drain line,
160: float, 161: switch.

Claims (15)

A detection sensor for detecting leakage gas leaking from the storage tank;
A spray device for spraying liquid in the form of mist; And
And a suction device for sucking the mist. The method according to claim 1,
Wherein the injector is selectively sprayed with a liquid in the form of mist or sprayed with a neutralizing liquid. 3. The method of claim 2,
The spray device includes a water supply line to which water is supplied, a neutralization liquid supply line to which the neutralization liquid is supplied, a water control valve to open and close the water supply line, a neutralization liquid control valve to open and close the neutralization liquid supply line, A main supply line communicating with the water supply line and the neutralization liquid supply line; a main control valve opening and closing the main supply line; and a spray head communicating with the main supply line. The method of claim 3,
Wherein the injector further comprises an air supply line for supplying air and an air control valve for opening and closing the air supply line,
Wherein the main supply line and the air supply line join together to communicate with the spray head. The method according to claim 1,
The injection device is rotatably installed in a fixed frame,
Wherein the injection device is coupled through a cylinder and a link member, and is provided so as to be rotatable up and down in accordance with the extension of the cylinder. The method according to claim 1,
Wherein the suction device is disposed in the same line on the injection device and the storage tank and is located on the opposite side of the spray device with respect to the storage tank. The method according to claim 1,
Wherein the suction device includes a suction fan rotated by a motor and a screen for condensing the mist containing the fume. 8. The method of claim 7,
Wherein the screen is provided with a plurality of mesh sheets. 8. The method of claim 7,
Wherein the suction fan comprises a first suction fan located in front of the screen and a second suction fan located behind the screen. 10. The method of claim 9,
The suction device
A front drain line provided at a lower portion of the screen to guide the solution that is dripped from the screen to the pit,
Further comprising a back drain line for guiding the solution dripping from the second suction fan to the pit. The method according to claim 1,
Further comprising a plurality of frames and a surveillance camera provided around the storage tank,
Wherein the detection sensor is installed together with the frame in which the surveillance camera is installed. The method according to claim 1,
Further comprising: a protection dam arranged to receive the storage tank therein and storing the solution leaking from the storage tank,
Wherein the protection dam is provided with a float floating on the inner wall of the protection dam by the liquid stored in the protection dam and a switch connected to the float to generate a signal when the floating body floats. The method according to claim 1,
The storage tank stores a hydrofluoric acid-containing chemical used for pickling, which separates the scale attached to the strip after annealing heat treatment of stainless steel (STS)
Wherein the detection sensor detects a fume of harmful chemical substances of the acid fuels. The sensing sensor senses the leaking gas leaking from the storage tank,
The spraying device sprays liquid in the form of a mist to collect the leaking gas,
The suction device sucks the mist trapped by the leaking gas,
Wherein the spraying device sprays a neutralizing liquid around the storage tank after spraying the mist. 15. The method of claim 14,
The control unit may spray the mist when it is determined that the leak gas is detected through the signal received from the detection sensor,
The control unit operates the suction device at the same time as the mist is sprayed or in an earlier time to suck the mist,
Wherein the controller stops spraying the mist of the sprayer when the leakage gas is judged to be reduced to a level below the reference range, and injects the neutralization liquid.

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