KR101658509B1

KR101658509B1 - Carbon dioxide removed using calcium hydroxide by-product and processing method

Info

Publication number: KR101658509B1
Application number: KR1020150120632A
Authority: KR
Inventors: 정충의
Original assignee: 정충의
Priority date: 2015-08-27
Filing date: 2015-08-27
Publication date: 2016-09-21

Abstract

The present invention relates to a method for removing carbon dioxide and using a by-product, and more particularly, to a method for removing carbon dioxide by using calcium oxide or lime, and furthermore, byproduct calcium carbonate, The present invention relates to a method for removing carbon dioxide and treating byproducts by using calcium hydroxide as a raw material and using calcium hydroxide as a multi-
A concrete solution means of the present invention is that,
A mixing and stirring step of feeding the quicklime into the mixing tank, feeding the quicklime into the mixing tank, stirring the mixture with a stirrer after the water is added, and stirring and storing the mixture again after the mixing and stirring step; A carbon dioxide removing step having a reaction tank for removing the carbon dioxide introduced by the air blowing means after passing through the stirring and storing step; a liquid calcium carbonate storing step in which the liquid carbon dioxide is stored by being pumped by the pump after the carbon dioxide removing step; A step of dewatering a gelatinous calcium carbonate in which the liquid calcium carbonate is pumped by an injection pump to form calcium carbonate in a dehydrated gel state in a dehydrator; and a step of dipping the dehydrated gelatinous calcium carbonate in a calcium carbonate In the process of removing carbon dioxide and by-products using slaked lime composed of the drying step As a result,
The microwave oscillation unit includes:
And a microwave discharge opening is formed in the inclined surface in a shape of an upper light-tight narrowing in a downward direction while forming an inclined surface on one side of the rectangular shaped upper surface of the housing, And a waveguide provided with a mesh network is coupled to the outer circumferential surface of the discharge port. The present invention provides a method for removing carbon dioxide and treating byproducts using a calcium hydroxide
According to the present invention constructed as described above, the liquid calcium carbonate produced after mixing and agitating the quicklime with water and removing the carbon dioxide can be used as a multipurpose recycled raw material, that is, as a raw material for building materials and various other uses, Calcium carbonate is dewatered and used as a raw material for various purposes in a gel state or further dried to be powdered to be used as a raw material for various purposes. Thus, calcium carbonate produced from quicklime which achieves environment-friendly aspect and recycling aspect at the same time It can be used as a versatile recycled raw material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for removing carbon dioxide using by-

The present invention relates to a method for removing carbon dioxide and using a by-product, and more particularly, to a method for removing carbon dioxide by using calcium oxide or lime, and furthermore, byproduct calcium carbonate, The present invention relates to a method for removing carbon dioxide and treating byproducts by using calcium hydroxide as a raw material and using calcium hydroxide as a raw material for multi-purpose recycling.

Generally, quicklime is also called calcium oxide (CaO). When calcium carbonate (CaCO ₃ ) is heated while air is blocked, carbon dioxide (CO ₂ ) is lost and calcium oxide is produced, and quicklime reacts with water, (Ca (OH) ₂ ) is generated and ionized to make the solution basic. Because of this property, acidity and chemical fertilizer are used to neutralize rice fields and fields acidified with alkali and to prevent disinfection.

Because of the high temperature neutralization heat generated during the neutralization process, the quicklime should be sealed when stored and avoid contact with moisture in the air. Therefore, direct contact with the aqueous solution should be avoided. Failure to observe this caution may result in fire or damage to skin tissue.

Studies have been carried out on a method for lowering the pH of the quicklime or lime as appropriate to the environmental standard. Among them, a method using an argillaceous stone as an additive is disclosed in Japanese Patent No. 396390, And a high-temperature sintering process at 800 ° C or higher.

In order to solve this problem, the technical point of the patent registration No. 10-0534239 entitled " a method for manufacturing a multipurpose recycled raw material of pulp lime using loess,

"Natural reddish brown loess is added to pulverized slaked lime powder 100 having a moisture content of 20 to 40% and pulverized lime is pulverized into pulverizer (2-1). The pulverized lime is put into a dryer (2-2) and dried to a moisture content of 3 to 10% , And then the mixture was put into a mixer, and various components contained in the loess were homogeneously mixed

Mixed 20 to 40 percent of the mixed loess powder was added to the mixer, and the mixture was heated to 80 to 100 ° C to dry to a moisture content of 10%. The mixture was subjected to a crushing process at 300 mesh or higher and a cooling process at room temperature The present invention proposes a method for producing a multi-purpose recycled raw material of pulp lime using yellow clay. &Quot;

As another prior art document, the technical point of the patent application '10-2004-0007383 entitled' Lime Sludge and Organic Lime Fertilizer Using Organic Waste and Organic Lime Fertilizer and Its Manufacturing Method '

(a) a quicklime production step of producing calcined lime by calcining a lime sludge at a temperature of 500 ° C or higher;

(b) adding and mixing 5 parts by weight to 40 parts by weight of solid matter of organic waste per 100 parts by weight of the product of step (a);

(c) assembling and molding the product of step (b);

(d) drying the product of step (c) by the heat of hydration of the product of step (a); &Quot; a method for producing a calcareous fertilizer using a lime sludge and an organic waste "

Another prior art document, Patent No. 10-1127530, entitled " Method for manufacturing a multicolor clay brick using slaked lime "

"Yellow lime or kaolin pulverized with an average particle diameter of 0.85 mm (20 Mesh) was mixed with lime powder pulverized to an average particle size of 150 탆 (100 Mesh) at a ratio selected from 5, 10, 20, 30 and 40% It is made to be 60, 70, 80, 90, 95% by weight according to the slump ratio and kneaded with water so that the water content of the kneaded product becomes 15 ~ 20% by weight. Extruded at a pressure of 2.0 to 3.0 kgf / m < 2 > under a vacuum, extruded and molded into a brick shape, dried for at least 50 hours in a drying chamber at an inlet temperature of 20 ± 5 ° C and an outlet temperature of 80 ± 10 ° C for a maximum of 70 hours, A clay brick at 300 ° C maximum temperature 1250 ° C for at least 36 hours for at least 56 hours in a tunnel kiln, or by firing and firing.

However, the above-mentioned prior art data is limited to the mixing of raw materials or the manufacture of a specified product in the pulverized slaked lime, and there is a problem in that the process, especially the use purpose, is limited.

Korean Patent Registration No. 10-0534239 Korean Patent Publication No. 10-2004-0007383 Korea Patent No. 10-1127530 Korea Patent No. 10-0254138

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a multipurpose recycled raw material, namely, calcium carbonate, which is produced by mixing calcium lime or slaked lime, , Building raw materials, and other various purposes. If necessary, the calcium carbonate produced in the liquid phase can be dewatered to be used as a raw material for various purposes in a gel state or further dried and powdered to be used as raw materials for various purposes. The present invention provides a method for removing carbon dioxide and treating a by-product using slaked lime that simultaneously achieves side and recycling aspects.

In order to accomplish the above object, according to a first aspect of the present invention,

A mixing and stirring step of feeding the quicklime into the mixing tank, feeding the quicklime into the mixing tank, stirring the mixture with a stirrer after the water is added, and stirring and storing the mixture again after the mixing and stirring step; A carbon dioxide removing step having a reaction tank for removing the carbon dioxide introduced by the air blowing means after passing through the stirring and storing step; a liquid calcium carbonate storing step in which the liquid carbon dioxide is stored by being pumped by the pump after the carbon dioxide removing step; A step of dewatering a gelatinous calcium carbonate in which the liquid calcium carbonate is pumped by an injection pump and formed into calcium carbonate in a dehydrated gel state in a dehydrator; and a step of dipping the dehydrated gelatinous calcium carbonate in a calcium carbonate which is solidified into a granular state In the process of removing carbon dioxide and by-products using slaked lime composed of the drying step As a result,

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The microwave oscillation unit includes:

And a microwave discharge opening is formed in the inclined surface in a shape of an upper light-tight narrowing in a downward direction while forming an inclined surface on one side of the rectangular shaped upper surface of the housing, And a waveguide provided with a mesh network is coupled to the outer circumferential surface of the discharge port. The present invention can achieve the above-described object by constituting the method of removing carbon dioxide and byproducts using a slaked lime.

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According to the present invention constructed as described above, the liquid calcium carbonate produced after mixing and agitating the quicklime with water and removing the carbon dioxide can be used as a multipurpose recycled raw material, that is, as a raw material for building materials and various other uses, Calcium carbonate is dewatered and used as a raw material for various purposes in a gel state or further dried to be powdered to be used as a raw material for various purposes. Thus, calcium carbonate produced from quicklime which achieves environment-friendly aspect and recycling aspect at the same time It can be used as a versatile recycled raw material.

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 construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a flow chart of a method for removing carbon dioxide and treating by-
FIG. 2 is a flow chart showing the addition of a crushing step in the method of removing carbon dioxide and by-
3 is a general schematic view of a method for removing carbon dioxide and treating a by-product using a slaked lime according to the present invention,
FIG. 4 is a general schematic view showing the addition of a reaction tank in the method of removing carbon dioxide and by-
5 is a perspective view schematically showing the carbon dioxide removal step in the carbon dioxide removal and by-product treatment method using the slaked lime according to the present invention.
FIG. 6 is a perspective view illustrating only the blowing means connected to the reaction tank among the structures of the carbon dioxide removal step in the carbon dioxide removal and by-
7 is a schematic cross-sectional view of a step of removing carbon dioxide in the method of removing carbon dioxide and by-
8 is a perspective view of a microwave oscillation unit in the step of drying calcium carbonate in the method of removing carbon dioxide and byproducts using the calcium hydroxide according to the present invention.

Hereinafter, a method for removing carbon dioxide and treating by-products using the slaked lime of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a flow chart of a carbon dioxide removal and by-product treatment method using the slaked lime according to the present invention. FIG. 2 is a flow chart showing the addition of a crushing step in the method of removing carbon dioxide and by-products using the slaked lime of the present invention. FIG. 4 is a schematic view showing the whole of a method of removing carbon dioxide and byproducts in the method according to the present invention. FIG. 5 is a schematic view showing a method of removing carbon dioxide and by- And FIG. 6 is a perspective view showing only the blowing means connected to the reaction tank among the structures of the carbon dioxide removal step in the carbon dioxide removal and by-product treatment method using the slaked lime according to the present invention. Using the slaked lime of the present invention And FIG. 8 is a perspective view of a microwave oscillation unit in the calcium carbonate drying step in the carbon dioxide removal and by-product treatment method using the slaked lime according to the present invention.

[Step of injecting quicklime] ----- S1

This step is a step of injecting quicklime, most of which is in the form of gas or powder, or sometimes in a solid form.

If the solidified form is put into the solidified form as described above, the solidified quicklime is transported and crushed by a screw or the like before the mixing and stirring step (S3) to be described later, and the pulverization step S2 ) Can be added.

Preferably, in this step, any one of the quicklime and the slaked lime or the quick lime and the slaked lime can be introduced.

[Mixing Stirring Step] ----- S3

7, a plurality of through holes 165 are formed in the washing water storage tank 150 and the washing water spray tank 160. Only the washing water spray tank 160 is shown in FIG. And the washing water storage tank 150 is omitted.

More specifically, vibration is generated in the washing water dropped in the washing water storage tank 150 by the vibration motor 161 on one side of the washing water spraying tank 160, ) Of the washing water is injected into the super absorbent resin 142 as if the washing water is sprayed to the super absorbent resin 142 and the super absorbent resin 142 is in contact with the washing water, It is convenient and easy to reduce the labor required to spray the washing water uniformly throughout the dust collecting plate 141.

After the mixing and stirring step (S3), the mixture is stirred again and transferred to the carbon dioxide removing step (S5) described below.

8, when dust is introduced through the inlet 100, coarse dust is primarily filtered by the filter 120 through the inflow space 110, and only fine dust passes through the filter 120 The fine dust passed through the dust collecting plate 141 adheres to the super absorbent resin 142 coated on the outer circumferential surface of the dust collecting plate 141 while the super absorbent resin 142 keeps the water layer on the surface so that the fine dust is always filtered by the water layer Fine dust attached to the water layer by the washing water sprayed by the washing water sprayer 160 at a predetermined interval is easily dropped off. The washing water is once discharged through the washing water injection valve 103 to the washing water storage tank The washing water thus stored is introduced into the washing water storage tank 150 through the pipe 173 by the pump 172 and then formed on the bottom surface of the washing water storage tank 150 Became Is dropped into the washing water spray tank 160 through the through hole and the washing water dropped in this manner is vibrated by the vibration motor 161 and is sprayed into the through hole 165 to be sprayed onto the outer surface of the dust collecting plate 141, (142) so as to keep the water layer on the surface of the super absorbent resin (142).

After the stirring and storing step (S4), there is provided a reaction tank (200) for removing carbon dioxide introduced by the blowing means (100)

As shown in FIGS. 5 to 7, in the carbon dioxide removing step (S5)

A blowing means 100 for supplying carbon dioxide,

And the reaction tank (200) connected to one end of the blowing means (100)

The reaction tank 200 is provided with a connecting portion 110 connected to the blowing means 100 at a lower end thereof and a quicklime mixed with the water transferred from the stirring and storing step S4 is supplied to the pump P And a plurality of injection pipes 210 crossing the inside of the upper end of the reaction tank 200 so as to be multi-stage injected after being bypassed in the upward direction, and a filter unit 220 is provided on the injection pipe 210 A direct water distribution pipe 230 for directly cleaning the filter unit 220 is provided on the filter unit 220 and a discharge pipe 240 for discharging carbon dioxide is provided on the direct water distribution pipe 230 ) Is formed,

The connection unit 110 forms a header pipe 130 connected to the main pipe 120 of the blowing unit 100. A plurality of branch pipes 131 are connected to and protrude from the header pipe 130, A plurality of water immersion pipes 132 are formed so as to be vertically connected to each one of the branch pipes 131 so as to pass through the inside of the reaction tank 200. The flooded pipe 132 is mixed with water stored in the reaction tank 200, It is a structure that allows flooding.

Meanwhile, the branch pipe 131 has a structure in which the inner diameter of the branch pipe 131 gradually decreases from the header pipe 130,

Preferably, the water immersion tube 132 has the same diameter.

The connection unit 110 forms a header pipe 130 connected to the main pipe 120 of the blowing unit 100. A plurality of branch pipes 131 are connected to the header pipe 130, And allowing the carbon dioxide to flow into the reaction vessel 200 through the reaction vessel 200,

More preferably, as shown in FIG. 4, a plurality of reaction vessels 200 are formed.

According to the present invention configured as described above, carbon dioxide is introduced into the reaction tank 200 by the blowing means 100, and after the reaction of the carbon black with the calcium oxide mixed with the water supplied from the stirring storage step S4, (200).

Wherein to generate calcium hydroxide (Ca (OH) _2), calcium carbonate (CaCo ₃₎ in combination with the CO ₂ as the most for a water mixing burnt lime is, CO ₂ removed is supplied from the stirring storing step (S4) . This will be described later.

Meanwhile, the blowing means 100 is provided as a means for introducing carbon dioxide into the reactor 200 side.

As shown in the drawing, the blowing means 100 adopts a connecting portion 110 for connecting the blowing fan to the reaction tank 200 to introduce carbon dioxide into the reaction tank 200, A header pipe 130 connected to the main pipe 120 of the blowing means 100 is formed and a plurality of branch pipes 131 are connected and protruded from the header pipe 130, A plurality of water immersion pipes 132 connected to the one branch pipe 131 in the vertical direction are formed so as to be submerged in the calcium carbonate mixed with the water stored in the reaction tank 200.

That is, the main pipe 120 connected by flange connection from the blowing means 100 has a header pipe 130 connected to the main pipe 120 in an orthogonal direction.

The speed and flow rate of the fluid flowing through the header pipe 130 and the main pipe 120 should be designed to be the same.

A branch pipe 131 is separately formed from the header pipe 130 so as to pass through the inside of the reaction tank 200.

Here, as shown in the figure, the branch pipe 131 is preferably formed to be smaller in steps as its diameter moves away from the header pipe 130.

That is, when the fluid pressure, the flow rate and the flow rate of the carbon dioxide supplied from the blowing means 100 pass through the main pipe 120 and the header pipe 130 as well as to the end of the branch pipe 131, This is because the effect of reaction with the calcium oxide mixed with the water stored in the reaction tank 200 can be enhanced.

In addition, a flood pipe 132 is connected to the lower end of each of the branch pipes 131 so as to be equally spaced apart and connected in an orthogonal form, so that the flooded pipe 132 can be submerged into the calcium carbonate mixed with the stored water in the reaction tank 200 Connection.

Each of the water immersion pipes 132 here has the same diameter.

The carbon dioxide is guided from the main pipe 120 of the connection part 110 to the header pipe 130 and then branched from the header pipe 130 by the operation of the blower 100. Thus, The water stored in the reaction tank 200 is submerged in the calcium oxide mixed with the water stored in the reaction tank 200 through the submerged pipe 132 orthogonally connected to the branch pipe 131 and discharged to the side of the submerged pipe 132, To react with the mixed lime.

The reaction at this time is made with calcium hydroxide (Ca (OH) ₂ ), and the reaction formula is as follows.

_{Ca (OH) 2 + CO 2} -> CaCO 3 + H 2 O

The connecting portion 110 of the blowing means 100 may be configured differently from the header pipe 130 connected to the main pipe 120 of the blowing means 100, (131) are connected to and protrude from the reaction tank (200), and carbon dioxide can be introduced into the reaction tank (200) through the reaction tank (200).

The branch pipe 131 penetrates through the reaction tank 200 without passing through the submerged pipe 132 in the form of the above-described submerged pipe 132, but is configured to pass through the pipe in a state close to the inner peripheral surface of the reaction tank 200.

Accordingly, when such a structure is provided, the carbon dioxide flowing from the blowing means 100 is supplied to the lower end of the reaction tank 200, and the reaction occurs while colliding with the surface layer of the mixed lime water mixed with water.

Meanwhile, in the stirring and storing step (S4), a multi-stage injection is performed after bypassing upward flow by a pump (P).

That is, the quicklime mixed with water to be supplied to the reaction tank 200 from the stirring and storing step S4 is bypassed upward in accordance with the operation of the pump P, So that the wastewater is allowed to fall down to the lower side of the reaction tank 200 through the spray tube 210.

Here, the injection pipe 210 may be formed in multiple stages in the upper and lower portions of the reaction tank 200 as shown in the drawing.

Therefore, the quicklime mixed with water flowing by bypass to the injection pipe 210 is sprayed downward from the upper side of the reaction tank 200 and falls down naturally. The rapid lime is stored in the lower part of the reaction tank 200 and reacts with the rising carbon dioxide. .

That is, due to the hydraulic pressure and the flow rate of carbon dioxide, it is impossible to sufficiently react with the mixed calcium oxide. To solve this problem, the gaseous carbon dioxide fed to the inside of the quick lime mixed with water is mixed with water, And is convected to the upward direction of the reaction tank 200. In the convection process, the re-reaction between the gas, in which the carbon dioxide has not been completely removed, and the calcium oxide mixed with the water sprayed through the spray pipe 210 side, It is possible to completely remove carbon dioxide.

In addition, since the injection tube 210 can be equally spaced apart from the proper position, it is possible to increase the removal efficiency of carbon dioxide.

The filter unit 220 is provided on the injection pipe 210 so that impurities or water contained in the carbon dioxide can be filtered and intermittently supplied to the filter unit 220 And the water distribution pipe 230 for cleaning the filter unit 220 is provided.

In addition, a discharge pipe 240 for discharging carbon dioxide is formed in the direction of the direct flow water distribution pipe 230 so that the rising carbon dioxide is discharged to the outside through the above-described process.

[Calcium carbonate storage step] ----- S6

After the carbon dioxide removing step (S5), the liquid calcium carbonate that is pumped and stored by the pump (P) is stored.

The liquid calcium carbonate thus stored is mixed with raw materials for various applications, for example, as a building material, or used as a raw material for producing other products.

[Calcium carbonate dehydration step] ----- S7

On the other hand, when calcium carbonate in a liquid state is not used and the user desires calcium carbonate in a gel state, the calcium carbonate in the liquid phase is pumped by the injection pump P1 as in the present step so that the dehydrated gel- It can be made of calcium carbonate and can meet the needs of users. It can also be used as a raw material for manufacturing desirable products mixed with various building materials and other raw materials of products.

[Calcium carbonate drying step] ----- S8

In this step, as in the case of the dehydration step (S7), if the user desires to solidify the granule or the chip form, the user desires to dry the dehydrated gel calcium carbonate with the microwave oscillation unit 800 to solidify the granulated calcium carbonate Or may further be pulverized by a pulverizer as in the pulverization step (S9) to produce a variety of products capable of circulating the product.

Preferably, drying by hot air in the step (S8) of drying the calcium carbonate is also applicable.

In particular, the microwave oscillation unit 800 includes:

The microwave is a rectangular shape that oscillates microwave into the housing (H) in a multistage manner in the housing (H) of the calcium carbonate drying step (S8) A structure in which a microwave discharge port 823 is drilled in the slant surface in the shape of a light beam and a waveguide 820 having a mesh network 824 is coupled to the outer peripheral surface of the discharge port 823, Lt; / RTI >

In the present invention having the above-described constitution, the liquid calcium carbonate produced after mixing and stirring the quicklime with water and removing the carbon dioxide is used as a multipurpose recycled raw material, that is, as a raw material for building materials and various other uses, Calcium is dehydrated to be used as a raw material for various purposes in a gel state or further dried and powdered to be used as a raw material for various purposes, thereby achieving both an environmentally friendly aspect and a recycling aspect.

As shown in FIGS. 1 to 4, the quicklime is transferred to the mixing tank T, and water is added thereto. Then, the mixture is stirred and mixed with a stirrer M and then stirred and stored. Then, carbon dioxide introduced by the blowing means is removed, By storing it in a liquid phase, by storing it in a gel state through a dehydrator, in a drying step, storing it as solidified granules or powdered granules, and selectively providing a user with a desired shape, It is a useful technology to recycle the calcium carbonate which should be discarded by mixing with the raw material of the product.

100; Blowing means 110; Connection
120; A main pipe 130; Header tube
131; Branch 132; Immersion tube
200; Reaction tank 210; Sprayer
220; A filter unit 230; Direct water distributor
240; A discharge pipe 800; The microwave oscillation portion
820; Waveguide 822; incline
823; A discharge port 824; Mesh network
H; Housing M; agitator
T; Mixing tank P; Pump
P1; Injection pump W; Dehydrator
S1; Quicklime charging step S2; Crushing step
S3; Quick lime and water mixing step S4; Stirring storage step
S5; Carbon dioxide removal step S6; Calcium carbonate storage step
S7; Calcium carbonate dehydration step S8; Calcium carbonate drying step
S9; Powdering step

Claims

(S3) of feeding the quicklime into the mixing tank (T), feeding the water into the mixing tank (T), stirring the mixture with the mixer (M), and mixing and stirring the mixture A carbon dioxide removing step (S5) having a reaction tank (200) for removing carbon dioxide introduced by a blowing means after passing through a stirring storage step (S4) and a stirring storage step (S4) A liquid calcium carbonate storage step S6 in which the liquid phase calcium carbonate is pumped by the pump P after the carbon dioxide removing step S5 is carried out and the calcium carbonate liquid is pumped to the infusion pump P1, A calcium carbonate dehydrating step (S7) formed of gelated calcium carbonate and a calcium carbonate drying step (S8) of drying the dehydrated gelated calcium carbonate with a microwave oscillating unit (800) to solidify the granulated calcium carbonate In the method for removing carbon dioxide and using by-products,
The microwave oscillation unit 800 includes:
The microwave is a rectangular shape that oscillates microwave into the housing (H) in a multistage manner in the housing (H) of the calcium carbonate drying step (S8) And a waveguide (820) having a mesh net (824) is coupled to an outer circumferential surface of the discharge port (823), wherein a microwave discharge port (823) is drilled in the inclined plane in a light- By - product treatment method.

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