JP2007222795A - Method and system for recycling japanese spirit lees as resource - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for recycling Japanese spirit lees as resources, which is used in order to drastically reduce the consumption of fossil fuel and by which an efficient system for recycling Japanese spirit lees can be constructed and to provide a system for recycling Japanese spirit lees as resources. <P>SOLUTION: The method for recycling Japanese spirit lees as resources comprises: a solid-liquid separation step of subjecting Japanese spirit lees to solid-liquid separation; a concentration step of concentrating the separated liquid obtained at the solid-liquid separation step to produce a concentrated material; a recycling step of recycling the concentrated material as resources; a combustion step of burning at least a part of the concentrated material; and a steam recovery step of utilizing the heat of combustion obtained at the combustion step to recover steam. The system for recycling Japanese spirit lees as resources is provided with: a solid-liquid separating means for subjecting Japanese spirit lees to solid-liquid separation; a concentrating means for concentrating the separated liquid obtained by the solid-liquid separating means to produce the concentrated material; a recycling means for recycling the concentrated material as resources; a burning means for burning at least a part of the concentrated material; and a steam recovering means for utilizing the heat of combustion obtained by the burning means to recover steam. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method and system for recycling shochu, and more particularly, to a method and system for recycling shochu that can greatly reduce the consumption of fossil fuel and construct an efficient shochu recycling system.

  As a conventional method for treating shochu (distillation residue), a method of incineration (for example, spraying shochu (liquid) in a furnace and burning it) or a method of using it for feed (Patent Document 1) has been performed.

  The former requires a large amount of auxiliary combustor (auxiliary fuel) for spray combustion of shochu having a water content of about 95%, such as 5% by weight of shochu. However, since the shochu contains valuable materials such as potassium (for example, about 2.5% by weight (wet base)), the incineration ash becomes a valuable material such as potassium carbonate.

  On the other hand, while the latter is an excellent method for the recycling of shochu with high nutritional value, the heat source (fuel) for drying is still required to be nearly the same as that for incineration. ) It has become a fuel consumption type treatment process.

Although both the incineration method and the dry feed method are significant for recycling, they consume a large amount of fuel, so it was difficult to achieve a sufficient process for recycling shochu.
JP 2000-125777 A

  Therefore, an object of the present invention is to provide a method and system for recycling shochu that can greatly reduce the consumption of fossil fuel and construct an efficient shochu recycling system.

  Other problems of the present invention will become apparent from the following description.

  The above problems are solved by the following inventions.

(Claim 1)
A solid-liquid separation step for separating the shochu into solid and liquid, a concentration step for producing a shochu concentrate by concentrating the liquid side of the shochu after the solid-liquid separation, and a resource for recycling the shochu concentrate A method of recycling shochu having a crystallization process,
A combustion step of incinerating at least a portion of the shochu concentrate;
And a steam recovery step of recovering steam using the combustion heat obtained in the combustion step.

(Claim 2)
A solid-liquid separation step for separating the shochu into solid and liquid, a concentration step for producing a shochu concentrate by concentrating the liquid side of the shochu after the solid-liquid separation, and a resource for recycling the shochu concentrate A method of recycling shochu having a crystallization process,
A combustion step of incinerating the shochu concentrate;
A steam recovery step of recovering steam using the combustion heat obtained in the combustion step;
A method for recycling shochu, which comprises adjusting the ratio of the amount sent to the resource recycling step and the amount sent to the combustion step in the shochu concentrate.

(Claim 3)
A drying step of drying the shochu concentrate obtained in the concentration step so as to have a predetermined moisture content;
The method for recycling shochu resources according to claim 1 or 2, wherein the shochu concentrate obtained in the drying step is sent to the combustion step.

(Claim 4)
4. The method of recycling shochu resources according to claim 1, further comprising a valuable material recovery step of recovering valuable materials from the exhaust gas generated in the combustion step.

(Claim 5)
The method for recycling shochu resources according to any one of claims 1 to 4, wherein the steam obtained in the steam recovery step is used as a heat source in the concentration step.

(Claim 6)
The method of recycling shochu according to any one of claims 1 to 4, wherein the steam obtained in the steam recovery step is used as a heat source in the concentration step and the resource recycling step.

(Claim 7)
Solid-liquid separation means for solid-liquid separation of the shochu, concentrating means for producing a shochu concentrate by concentrating the liquid side of the shochu after the solid-liquid separation, and resources for recycling the shochu concentrate A shochu resource recycling system comprising:
Combustion means for incinerating at least a portion of the shochu concentrate;
A steam recovery system comprising: steam recovery means for recovering steam using combustion heat obtained by the combustion means.

(Claim 8)
Solid-liquid separation means for solid-liquid separation of the shochu, concentrating means for producing a shochu concentrate by concentrating the liquid side of the shochu after the solid-liquid separation, and resources for recycling the shochu concentrate A shochu resource recycling system comprising:
Combustion means for incinerating the shochu concentrate;
Steam recovery means for recovering steam using the combustion heat obtained by the combustion means;
A shochu condensate recycling system comprising adjusting means for adjusting a ratio of an amount sent to the recycling means and an amount sent to the combustion means of the shochu concentrate.

(Claim 9)
A drying means for drying the shochu concentrate obtained by the concentration means so as to have a predetermined moisture content;
The shochu condensate system according to claim 7 or 8, wherein the shochu concentrate obtained by the drying means is sent to the combustion means.

(Claim 10)
10. The shochu resource recycling system according to claim 7, 8 or 9, further comprising valuable material recovery means for recovering valuable material from the exhaust gas generated by the combustion means.

(Claim 11)
The shochu resource recycling system according to any one of claims 7 to 10, further comprising steam supply means for using the steam obtained by the steam recovery means as a heat source in the concentrating means.

(Claim 12)
11. The shochu liquor according to claim 7, further comprising a steam supply means for using the steam obtained by the steam recovery means as a heat source in the concentration means and the resource recovery means. Recycling system.

  ADVANTAGE OF THE INVENTION According to this invention, the consumption method of a fossil fuel can be reduced greatly, and the recycling method and system of a shochu liquor which can construct | assemble an efficient shochu recycling system can be provided.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a flowchart showing an example of a system for carrying out the shochu resource recycling method according to the present invention.

  Shochu (eg, shochu) produced in a brewing company or the like is carried into a processing facility by a tank lorry, for example, and stored in the stock solution storage tank 1. The stock solution storage tank 1 incorporates, for example, a steam coil in order to prevent corruption, and maintains the temperature of the shochu stock solution stored therein at 60 to 80 ° C. The stock solution storage tank 1 is preferably provided with a stirrer (not shown) in order to prevent sedimentation of solids.

  The shochu stock solution carried into the stock solution storage tank 1 has a solid content concentration of about 6 to 10% by weight.

  The shochu stock solution stored in the stock solution storage tank 1 is sent to the solid-liquid separation facility 2 by a pump (not shown).

  In the solid-liquid separation facility 2, the shochu stock solution sent from the stock solution storage tank 1 is subjected to solid-liquid separation and separated into a solid content and a liquid side (separated solution). The specific solid-liquid separation means that can be used in the solid-liquid separation facility 2 is not particularly limited, and for example, an apparatus generally used as a solid-liquid separation means such as a screw press, a decanter, a rotary screen, or the like can be used. . These are not limited to those using any one kind, for example, once separated into a solid and a separated liquid with a screw press, and then separated into a solid and a separated liquid by a decanter. It is also preferable to use the solid-liquid separation means in multiple stages.

  In the solid-liquid separation facility 2, the shochu stock solution is subjected to solid-liquid separation so that the water content of the separated liquid is about 95%.

  The separated liquid separated by the solid-liquid separation equipment 2 is sent to the concentration equipment 3 and the solid content is sent to the drying equipment 4.

  In the concentration facility 3, the separation liquid having a water content of about 95% is reduced to a water content of about 50 to 55%. As a specific concentration means used for this purpose, a multi-effect can is preferable.

  Depending on the type of shochu, a concentrating means combining a multi-effect can and another evaporator such as a drum dryer is preferable.

  FIG. 2 shows a flow of the concentration facility 3 using a multi-effect can.

  The multi-effect can 31 concentrates by heating and evaporating the separated liquid of the shochu separated in the solid-liquid separation facility 2. Although the triple effect can which consists of the 1st can 31a, the 2nd can 31b, and the 3rd can 31c is used in FIG. 2, it is not specifically limited.

  The first can 31a concentrates by heating and evaporating the separated liquid of shochu using the steam supplied from the steam supply line 200 as a heat source. The concentrated liquid concentrated in the first can 31a is sent to the second can 31b via the pipe 311, and the steam generated in the first can 31a is sent to the second can 31b via the steam pipe 201. It is further evaporated by heating as a heat source and concentrated. The concentrated liquid concentrated in the second can 31b is sent to the third can 31c via the pipe 312 and the steam generated in the second can 31b is sent to the third can 31c via the steam pipe 202, It is further evaporated by heating as a heat source, and the water content of the shochu concentrate discharged from the pipe 313 is reduced to about 55%. The steam generated in the third can 31c is sent to a distillation tower (not shown) through the steam pipe 203. However, depending on the type of shochu, dehydration to a moisture content of 55% becomes difficult from the viewpoint of fluidity and the like, so it is necessary to add another concentrating means to this.

  On the other hand, the solid content separated by the solid-liquid separation equipment 2 is sent to a dryer 41 (second resource-making means) provided in the drying equipment 4 (resource-making means). Although it does not specifically limit as the dryer 41, It is preferable to use the dryer which heat-drys using the vapor | steam supplied from the vapor | steam line 300 as a heat source. The dryer 41 dries the shochu solids to a moisture content of about 12%. The obtained dried product is sold to feed companies as livestock feed.

  In addition, the shochu concentrate obtained in the concentration facility 3 is sent to a dryer 42 (first resource-recycling means) provided in the drying facility 4. Although it does not specifically limit as the dryer 42, It is preferable to use the dryer which performs heat drying using the vapor | steam supplied from the vapor | steam line 300 as a heat source. In order to alleviate the stickiness of the semi-dried shochu, it is preferable to add to the dryer 42 an approximately the same amount of bran as the solid content of the shochu. The obtained dried product is sold to feed companies as livestock feed.

  Shochu generated in a brewing company or the like is finally made a useful resource such as livestock feed through the above process.

  In the present invention, a combustion facility 5 is provided after the concentration facility 3, and at least a part of the shochu concentrate obtained in the concentration facility 3 is sent to the combustion facility 5 and incinerated. .

  In general, as shown in the graph showing the relationship between the water content of shochu and the calorific value of the shochu concentrate, the combustion heat decreases as the water content increases. Therefore, if sufficient combustion heat (for example, 2500 kcal / kg as the lower heating value) cannot be obtained even with the shochu concentrate with a moisture content of 50 to 55% obtained in the concentration facility 3, a drying facility is provided before the combustion facility 5. (Not shown) may be provided to perform additional drying. Moreover, you may make it provide a drying equipment similarly, when the moisture content fall to 50 to 55% of a moisture content is difficult. The position of the drying equipment may be before or after the adjusting equipment 6 described later.

  Even if the burner temperature is set to 80 to 90 ° C., the oil (fuel) mixed type burner (for COM, Consideration such as using for CWM) is necessary. The temperature dependence of concentrated shochu viscosity is shown in FIG.

  For this reason, a fluidized bed type furnace or the like is an effective method for the combustion equipment 5, but a bed combustion type furnace is preferable in consideration of economy. The fluidized bed type has a problem that the construction cost is high, and the burner type has to mix a relatively large amount of oil in order to increase the fluidity of the semi-dry shochu, resulting in a reduction in consumption. Enlarge.

  If about 1/2 of the shochu concentrate obtained by the concentrating facility 3 is sent to the combustion facility 5, in the case of a floor combustion type incineration boiler, a small amount of oil is consumed for auxiliary combustion. It is possible to reduce to about 1/4 to 1/5 in the case of the spray combustion method in which the total amount of the shochu concentrate is incinerated. The effect of reducing the amount of the auxiliary combustion agent is the same in the fluidized bed type, but as described above, the bed combustion type is advantageous in terms of construction cost. The oil consumption for the burner spray combustion system under the same condition is reduced to about 1/3.

  At least a part of the shochu concentrate obtained in the concentrating facility 3 is sent to the combustion facility 5 in this way. Of the shochu concentrate obtained in the concentrating facility 3, the dryer of the drying facility 4 is used. An adjustment facility 6 for adjusting the ratio of the amount sent to 42 and the amount sent to the combustion facility 5 is provided in the subsequent stage of the concentration facility 3.

  As the adjusting equipment 6, a certain amount of the shochu concentrate having a water content of 50 to 55% obtained in the concentrating equipment 3 can be distributed and conveyed to the dryer 42 and the combustion equipment 5 of the drying equipment 4 as appropriate. The conveying means can be used.

  FIG. 5 shows an example of such an adjustment facility 6. (A) is sectional drawing, (b) is a top view.

  The shochu concentrate obtained in the concentration maintenance 3 is conveyed by a conveyor or the like (not shown) and accommodated in the hopper 61. Two screw conveyors 62a and 62b are arranged in parallel at the bottom of the hopper 61, and are independently driven to rotate by motors 63a and 63b provided at one end.

  The other ends of the screw conveyors 62a and 62b extend to the outside from the bottom of the hopper 61, and form outlets 64a and 64b, respectively. The shochu concentrates respectively carried out from the carry-out ports 64a and 64b are sent to the dryer 42 of the combustion facility 5 or the drying facility 4 directly or via a conveyor not shown.

  In the adjustment facility 6, the shochu concentrate contained in the hopper 61 is sent to the combustion facility 5 and the amount of the drying facility 4 by appropriately adjusting the drive time or drive speed of the screw conveyors 62 a and 62 b. The ratio with the amount sent to the dryer 42 can be adjusted.

  In addition, although not shown in the drawings, the adjustment equipment 6 uses two bucket conveyors that convey the shochu concentrate contained in the hopper to the combustion equipment 5 and the dryer 42 of the drying equipment 4, respectively. You may make it adjust the ratio of the quantity sent to the combustion equipment 5 and the quantity sent to the dryer 42 of the drying equipment 4 by adjusting the drive time or drive speed of a conveyor suitably.

  In addition, the shochu concentrate is not limited to one that is distributed and conveyed to the dryer 42 of the combustion facility 5 and the drying facility 4 by the conveying means such as these two screw conveyors 62a, 62b and two bucket conveyors. You may make it provide the conveyance destination in the combustion equipment 5 and the dryer 42 of the drying equipment 4 so that rotation is possible using (one) conveyance means. In this case, the ratio of the amount sent to the combustion facility 5 and the amount sent to the dryer 42 of the drying facility 4 can be adjusted by the time to be turned to each conveyance destination.

  The adjustment of the quantity ratio in the adjustment facility 6 can be performed automatically or manually by an operator.

  The exhaust gas generated when the shochu concentrate is incinerated by the combustion facility 5 is sent to the waste heat boiler 8 after being dust-removed by the high-temperature cyclone 7 at the subsequent stage.

  The waste heat boiler 8 is a steam recovery unit that recovers steam by heating water supplied from the water supply line 100.

  The steam recovered in the waste heat boiler 8 is supplied to the dryer 41 and 42 of the concentrating facility 3 (the first can 31a of the multi-effect can 31) and the drying facility 4 through the steam supply lines 200 and 300, as described above. It is used as a heat source for each.

  Further, the heat-exchanged exhaust gas discharged from the waste heat boiler 8 is sent to the subsequent bag filter 9. The bag filter 9 collects the exhaust gas discharged from the waste heat boiler 8 and collects the dust. The dust separated from the exhaust gas by the high-temperature cyclone 7 is also collected together with the dust collected by the bag filter 9.

  From the dust collected from the bag filter 9 and the high-temperature cyclone 7, mainly potassium salts (such as carbonates) are recovered as valuable materials. The collected valuables are sold to the contractor. The bag filter 9 and the high-temperature cyclone 7 constitute a valuable material recovery means.

  As described above, according to the present invention, at least a part of the shochu concentrate obtained in the concentration facility 3 is sent to the combustion facility 5 for incineration, and steam is recovered by the combustion heat. The consumption of fossil fuel that was required to generate steam can be greatly reduced.

  Further, by using the collected steam as a heat source for the concentration facility 3 and the drying facility 4, efficiency can be improved.

  Further, in the present invention, the ratio of the amount sent to the combustion facility 5 and the amount sent to the dryer 42 of the drying facility 4 among the shochu concentrate obtained in the concentration facility 3 is the ratio of the auxiliary combustion oil used in the combustion facility 5. The adjustment facility 6 is controlled in accordance with fluctuations in fuel costs and purchase costs of bran added to the dryer 42 of the drying facility 4, and fluctuations in sales revenue of potassium salt, which is a feed and recovered valuables. By adjusting as necessary, a more efficient shochu recycling system can be constructed.

  In the shochu resource recycling system described above, in the drying facility 4, the dryer 41 that dries the solids separated in the solid-liquid separation facility 2 and the dryer that dries the shochu concentrate obtained in the concentration facility 3. 42 are provided independently, but they may be integrated.

  An example is shown in FIG. The parts denoted by the same reference numerals as those in FIG.

  Here, the drying facility is constituted by one dryer 400 that receives the solid content separated by the solid-liquid separation facility 2 and the shochu concentrate obtained by the concentration facility 3 and then distributed by the conditioning facility 6. .

  Since the water content is different between the solid content separated by the solid-liquid separation equipment 2 and the shochu concentrate obtained by the concentration equipment 3, it is preferable to separate them in the dryer 400 and dry them. For example, it may be performed at predetermined intervals such as a time for receiving and drying the solid content separated by the solid-liquid separation facility 2 and a time for receiving and drying the shochu concentrate obtained by the concentration facility 3. .

  In this case, a stock tank or the like for temporarily storing the solids separated by the solid-liquid separation facility 2 and the shochu concentrate obtained by the concentration facility 3 in the previous stage of the dryer 400 should be provided. Is preferred.

  Further, in the present invention, the shochu concentrate obtained in the concentration facility 3 is made to have a predetermined moisture content by the dryer 42 of the drying facility 4 shown in FIG. 1 or the dryer 400 of the drying facility 4 shown in FIG. The dried and semi-dried livestock feed is produced as a resource, but the shochu concentrate obtained in the concentration facility 3 is stored in a stock tank or the like, and the stored concentrated liquid itself is used as livestock feed or the like. You may make it sell as an additive (resource) with high nutritional value.

  Hereinafter, the effect of the present invention is illustrated by examples.

  Concentrate the shochu liquor (water content about 95%, about 7 t / h) after solid-liquid separation treatment in a triple effect can, then add bran as an auxiliary material to the shochu concentrate and dry it completely. The conventional process (Comparative Example 2) for converting to feed and remodeling it, burning the required amount (approximately ½ amount) of the shochu concentrate after semi-drying with a floor combustion type incineration boiler for concentration And the process (Example) shown in FIG. 1 for collecting steam for drying.

  In the current drying technology, in the examples as well, it is necessary to add bran as much as the solid content of the shochu concentrate as a measure to alleviate the remarkable stickiness of the shochu semi-dried product. The total amount of bran used in was reduced to about ½ compared with Comparative Example 2 because the amount of cauterization to be dried was halved.

  In the examples, the amount of feed as a product is halved, but on the other hand, the consumption of the auxiliary combustor (fossil fuel) can be greatly reduced (1/4 to 1/5 the amount of Comparative Example 2) and incineration ( As a result of thermal recycling, the potassium salt can be recovered.

  Moreover, as Comparative Example 1, a comparison with a process of directly incinerating all the shochu was also performed.

  The results are shown in Table 1.

  In the process of the example, the expected value of kerosene consumption under the current conditions for accepting shochu is a minimum of about 20 kg / hour. By operating the process shown in the example under the optimum conditions, the consumption of fossil fuel is reduced. An energy saving and environmental conservation type resource recovery process that can be significantly reduced is established.

  The method of incinerating the entire amount in Comparative Example 1 is that oil consumption due to the large latent heat of evaporation of the shochu moisture, unless an efficient concentration method such as a multi-effect can is used before the incineration boiler as in the example. The amount is greater than in the example process.

  The reason why the present invention is the most realistic and economical is that the ratio of incineration / forage conversion is adjusted for the fluctuations in fuel and bran purchase costs and the fluctuations in feed and potassium salt sales revenues. The value can be set.

Flow chart showing an example of a shochu resource recycling system for carrying out the shochu resource recycling method according to the present invention. Flow diagram showing an example of concentration equipment Graph showing the relationship between the moisture content of shochu and the calorific value Graph showing temperature dependence of concentrated shochu viscosity (A) is sectional drawing which shows an example of adjustment equipment, (b) is the top view FIG. 5 is a flowchart showing another example of a shochu resource recycling system for implementing the shochu resource recycling method according to the present invention.

Explanation of symbols

1: Stock solution storage tank 2: Solid-liquid separation equipment 3: Concentration equipment 31: Multi-effect can 31a: First can 31b: Second can 31c: Third can 311, 312, 313: Piping 4: Drying equipment (resource recycling means) )
41: dryer 42: dryer 400: dryer 5: combustion equipment (combustion means)
6: Adjustment equipment (adjustment means)
61: Hopper 62a, 62b: Screw conveyor 63a, 63b: Motor 64a, 64b: Unloading port 7: High temperature cyclone (valuable material recovery means)
8: Waste heat boiler (steam recovery means)
9: Bug filter (value collection means)
100: Water supply line 200, 300: Steam supply line

Claims (12)

A solid-liquid separation step for separating the shochu into solid and liquid, a concentration step for producing a shochu concentrate by concentrating the liquid side of the shochu after the solid-liquid separation, and a resource for recycling the shochu concentrate A method of recycling shochu having a crystallization process,
A combustion step of incinerating at least a portion of the shochu concentrate;
And a steam recovery step of recovering steam using the combustion heat obtained in the combustion step. A solid-liquid separation step for separating the shochu into solid and liquid, a concentration step for producing a shochu concentrate by concentrating the liquid side of the shochu after the solid-liquid separation, and a resource for recycling the shochu concentrate A method of recycling shochu having a crystallization process,
A combustion step of incinerating the shochu concentrate;
A steam recovery step of recovering steam using the combustion heat obtained in the combustion step;
A method for recycling shochu, which comprises adjusting the ratio of the amount sent to the resource recycling step and the amount sent to the combustion step in the shochu concentrate. A drying step of drying the shochu concentrate obtained in the concentration step so as to have a predetermined moisture content;
The method for recycling shochu resources according to claim 1 or 2, wherein the shochu concentrate obtained in the drying step is sent to the combustion step.   4. The method of recycling shochu resources according to claim 1, further comprising a valuable material recovery step of recovering valuable materials from the exhaust gas generated in the combustion step.   The method for recycling shochu resources according to any one of claims 1 to 4, wherein the steam obtained in the steam recovery step is used as a heat source in the concentration step.   The method of recycling shochu according to any one of claims 1 to 4, wherein the steam obtained in the steam recovery step is used as a heat source in the concentration step and the resource recycling step. Solid-liquid separation means for solid-liquid separation of the shochu, concentrating means for producing a shochu concentrate by concentrating the liquid side of the shochu after the solid-liquid separation, and resources for recycling the shochu concentrate A shochu resource recycling system comprising:
Combustion means for incinerating at least a portion of the shochu concentrate;
A steam recovery system comprising: steam recovery means for recovering steam using combustion heat obtained by the combustion means. Solid-liquid separation means for solid-liquid separation of the shochu, concentrating means for producing a shochu concentrate by concentrating the liquid side of the shochu after the solid-liquid separation, and resources for recycling the shochu concentrate A shochu resource recycling system comprising:
Combustion means for incinerating the shochu concentrate;
Steam recovery means for recovering steam using the combustion heat obtained by the combustion means;
A shochu condensate recycling system comprising adjusting means for adjusting a ratio of an amount sent to the recycling means and an amount sent to the combustion means of the shochu concentrate. A drying means for drying the shochu concentrate obtained by the concentration means so as to have a predetermined moisture content;
The shochu condensate system according to claim 7 or 8, wherein the shochu concentrate obtained by the drying means is sent to the combustion means.   10. The shochu resource recycling system according to claim 7, 8 or 9, further comprising valuable material recovery means for recovering valuable material from the exhaust gas generated by the combustion means.   The shochu resource recycling system according to any one of claims 7 to 10, further comprising steam supply means for using the steam obtained by the steam recovery means as a heat source in the concentrating means. 11. The shochu liquor according to claim 7, further comprising a steam supply means for using the steam obtained by the steam recovery means as a heat source in the concentration means and the resource recovery means. Recycling system.

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