JP6385881B2 - Method and apparatus for manufacturing water-absorbing treatment material - Google Patents

Description

  The present invention relates to a method and apparatus for manufacturing a water-absorbing treatment material.

  Patent Document 1 describes a method for producing an excrement disposal material, which is a kind of water absorption treatment material. In this manufacturing method, first, the raw material is pulverized by a pulverizer. Next, after adding water to the pulverized raw material, the raw material is kneaded. Subsequently, the kneaded raw material is granulated by an extrusion granulator to form a granular core layer. Finally, the core layer is coated with a coating material. The excrement disposal material which consists of a core layer and a covering layer is obtained by the above.

JP 2014-183836 A

  Thus, in the manufacturing method of the conventional water absorption processing material, the process of adding water to a raw material (granulated material) is performed prior to the granulation process. A hydration process is performed in order to adjust the moisture content of a raw material. Therefore, the hydration process is an important process indispensable in the conventional method for producing a water-absorbing treatment material. However, on the other hand, performing the hydration process is a factor that causes the manufacturing process of the water-absorbing treatment material to become complicated.

  This invention is made | formed in view of the said subject, and aims at providing the manufacturing method and manufacturing apparatus of the water absorption processing material which can abbreviate | omit a hydration process.

  The method for producing a water-absorbing treatment material according to the present invention comprises a granulated product by granulating a granulated material containing a first material and a second material having a moisture content smaller than that of the first material. And the first material and the second material are the same material.

  In this manufacturing method, the granulated material includes first and second materials having the same material but different moisture contents. For this reason, the moisture content of the whole granulated material can be adjusted by changing the constituent ratios of the first and second materials in the granulated material. Therefore, according to this manufacturing method, the step of adding water to the granulated material can be omitted.

  The water-absorbing treatment material manufacturing apparatus according to the present invention granulates a granulated material including a first material and a second material having a moisture content smaller than that of the first material. A granulator for forming a granule is provided, wherein the first and second materials are the same material.

  In this manufacturing apparatus, the granulated material includes the first and second materials having the same material but different moisture contents. For this reason, the moisture content of the whole granulated material can be adjusted by changing the constituent ratios of the first and second materials in the granulated material. Therefore, according to this manufacturing apparatus, the process of adding water to the granulated material can be omitted.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method and manufacturing apparatus of the water absorption processing material which can abbreviate | omit a hydration process are implement | achieved.

It is a schematic diagram which shows one Embodiment of the water absorption processing material by this invention. It is a block diagram which shows one Embodiment of the manufacturing apparatus of the water absorption processing material by this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same reference numerals are assigned to the same elements, and duplicate descriptions are omitted.

  FIG. 1 is a schematic view showing an embodiment of a water-absorbing treatment material according to the present invention. The water-absorbing treatment material 30 is a water-absorbing treatment material that absorbs liquid, and includes a granular core portion 32 (granulated material) and a coating layer portion 34. The water absorption treatment material 30 is, for example, an excrement treatment material that absorbs excrement such as cats and dogs.

  The granular core part 32 is formed into a granular shape. Examples of the granular shape include a sphere, a cylinder, and an ellipsoid. The granular core part 32 has a function of absorbing and retaining a liquid. As a material (granulated material) constituting the granular core portion 32, for example, a pulp material, a tea shell, plastics, or okara can be used. These materials are preferably the main materials of the granular core portion 32. Here, the main material of the granular core part 32 means a material having the largest weight ratio in the granular core part 32 among the materials constituting the granular core part 32.

  The pulp material refers to a material mainly composed of pulp. Examples of the pulp material include, in addition to ordinary paper, PVC wallpaper classifieds (paper obtained by classifying PVC wallpaper), fluff pulp, pulp sludge (including papermaking sludge, and so on). It is done. As plastics, for example, a paper diaper classification product (plastic obtained by classifying paper diapers) may be used.

  The covering layer portion 34 covers the granular core portion 32. The covering layer part 34 may cover the entire surface of the granular core part 32, or may cover only a part of the surface of the granular core part 32. The covering layer portion 34 has a function of adhering the water-absorbing treatment materials 30 that have absorbed the liquid during use to make them solid. Also as a material which comprises the coating layer part 34, a pulp material, a tea shell, plastics, or okara can be used, for example. These materials are preferably the main materials of the covering layer portion 34.

  The covering layer portion 34 contains an adhesive material. As such an adhesive material, for example, starch, CMC (carboxymethyl cellulose), PVA (polyvinyl alcohol), dextrin, or a water-absorbing polymer can be used.

  FIG. 2 is a block diagram showing an embodiment of a water-absorbing treatment material manufacturing apparatus according to the present invention. The manufacturing apparatus 1 is an apparatus that manufactures the water-absorbing treatment material 30 described above, and includes a granulator 10, a pulverizer 20, and a pulverizer 22.

  The granulator 10 forms a granulated material by granulating a granulated material. In this embodiment, the granulator 10 granulates a granulated material that has not been hydrated or kneaded. The granulator 10 is an extrusion granulator, for example.

  The granulated material includes a first material and a second material having a moisture content smaller than that of the first material. However, these first and second materials are the same material. For example, when the first and second materials are pulp materials, a pulp material having a relatively high moisture content is used as the first material, and a pulp material having a relatively low moisture content is used as the second material. Become. At this time, as the first material, for example, pulp sludge pulverized in a state where the moisture content is 40% by weight or more (hereinafter referred to as “hydrated pulverized sludge”) can be used. Alternatively, when the first and second materials are tea husks, a tea husk having a relatively high water content is used as the first material, and a tea husk having a relatively low water content is used as the second material. At this time, as the first material, for example, tea crushed with a moisture content of 45% by weight or more (hereinafter referred to as “water-containing crushed tea husk”) can be used.

  When the water content of the first material is R1 (% by weight) and the water content of the second material is R2 (% by weight), R1−R2 ≧ 20 is preferable, and R1−R2 ≧ 40. Is more preferable. The second material may be substantially free of moisture. That is, the moisture content (R2) of the second material may be substantially equal to zero.

  The pulverizer 20 and the pulverizer 22 pulverize the first material and the second material, respectively. These pulverizations are performed prior to granulation by the granulator 10. For example, when the first material is water-containing pulverized sludge, the pulverizer 20 pulverizes pulp sludge having a water content of 40% by weight or more. Alternatively, when the first material is the water-containing crushed tea shell, the pulverizer 20 will pulverize the tea shell in a state where the moisture content is 45% by weight or more.

  Then, one Embodiment of the manufacturing method of the water absorption processing material by this invention is described with operation | movement of the manufacturing apparatus 1. FIG. First, the first material is pulverized using the pulverizer 20, and the second material is pulverized using the pulverizer 22 (pulverization step). Next, the pulverized first and second materials are each transferred to the granulator 10 using a transfer means (not shown). As such a transfer means, for example, a belt conveyor or a screw conveyor can be used.

  Then, the granulated material is formed by granulating the granulated material containing the 1st and 2nd material using the granulator 10 (granulation process). In the granulation step, a granulated material that has not been hydrated or kneaded is granulated. That is, in this embodiment, prior to granulation, neither the step of adding water to the granulated material nor the step of kneading the granulated material is performed. Thereby, the granular core part 32 is formed as a granulated material.

  Next, the coating layer portion 34 is formed by attaching a material constituting the coating layer portion 34 around the granular core portion 32 using a coating apparatus or the like. The material can be attached by, for example, spraying or spraying. Thereafter, the water-absorbing treatment material thus obtained is passed through a sieve having a sieve with a predetermined size to extract only the water-absorbing treatment material satisfying a predetermined standard. And the extracted water absorption processing material is dried with a dryer. Thus, the water absorption treatment material 30 is obtained.

  The effect of this embodiment will be described. In this embodiment, the granulated material includes first and second materials having the same material but different moisture contents. For this reason, the moisture content of the whole granulated material can be adjusted by changing the constituent ratios of the first and second materials in the granulated material. For example, consider a case where the granulated material is composed of only the first and second materials. In this case, when the moisture content of the first and second materials is 50% by weight and 10% by weight, respectively, if the constituent ratio of the first and second materials in the granulated material is 50%, The moisture content of the entire granulated material can be adjusted to 30% by weight. Therefore, according to the present embodiment, the step of adding water to the granulated material can be omitted. In fact, in this embodiment, prior to granulation, no water is added to the granulated material. This leads to simplification of the manufacturing process of the water absorption treatment material 30.

  Thus, in the present embodiment, the moisture content of the granulated material is adjusted by combining the first and second materials having different moisture contents. Therefore, the greater the difference in moisture content between the first and second materials, the wider the range in which the moisture content of the granulated material can be adjusted. As in the above example, if the moisture content of the first and second materials is 50% by weight and 10% by weight, respectively, the moisture content of the granulated material is adjusted within the range of 10% to 50% by weight. It becomes possible to do. From this point of view, the water contents R1 and R2 of the first and second materials are preferably R1−R2 ≧ 20, and more preferably R1−R2 ≧ 40.

  By the way, when granulating a material that does not substantially contain moisture, it is necessary to add water to the material prior to granulation. In this regard, in this embodiment, even when a material that does not substantially contain moisture is used as the second material, moisture necessary for granulation can be covered by moisture contained in the first material. Therefore, the hydration step is unnecessary.

  When the first and second materials are pulp materials, the material is excellent in water absorption, so that the water absorption of the granular core portion 32 and the water absorption treatment material 30 can be increased. In particular, when water-containing ground sludge is used as the first material, the first material having a high water content can be easily obtained. This is because pulp sludge originally contains a large amount of moisture and can utilize the moisture as it is. As described above, the water-containing pulverized sludge is obtained by pulverizing pulp sludge having a water content of 40% by weight or more in the pulverization step. When the pulp sludge is pulverized in such a high water content state, it is not necessary to dry the pulp sludge prior to pulverization. For this reason, the fall of the water absorption of the pulp sludge by drying can be avoided. On the other hand, if the pulp sludge is dried too much, the fibers contract and become a factor that lowers the water absorption of the pulp sludge and thus the water-absorbing treatment material.

  When the first and second materials are tea husks, since the material is excellent in water absorption, the water absorption of the granular core portion 32 and the water absorption treatment material 30 can be increased. In particular, when water-containing ground tea leaves are used as the first material, a first material having a high water content can be easily obtained. This is because tea leaves originally contain a large amount of moisture, and the moisture can be utilized as it is. As described above, the water-containing crushed tea shell is obtained by pulverizing the tea husk having a water content of 45% by weight or more in the pulverization step. Thus, when crushing tea leaves with a high moisture content, it is not necessary to dry the tea leaves prior to crushing. For this reason, it is possible to avoid a decrease in water absorption of the tea husk due to drying. On the other hand, if the tea husk is dried too much, the fiber contracts, which causes a reduction in the water absorption of the tea husk and the water-absorbing treatment material.

  In the present embodiment, the granulated material is not kneaded prior to granulation. This also leads to simplification of the manufacturing process of the water absorption treatment material 30. On the other hand, kneading of the granulated material not only complicates the manufacturing process, but also the water disintegration property of the water-absorbing treatment material (bonded fibers and particles are separated quickly by contact with water). In addition, it is a factor that lowers the property of being dispersed in water. This is because, by kneading, the granulated materials are intertwined in a complicated manner and are difficult to separate. According to the present embodiment, such a problem can be solved and the water-absorbing treatment material 30 having high water disintegrability can be obtained. Since the water-absorbing treatment material 30 can be disposed of after being used in a flush toilet, it is highly convenient for the user.

  The present invention is not limited to the above embodiment, and various modifications can be made. In the said embodiment, the case where the process of kneading | mixing a granulated material was not performed was illustrated. However, such a kneading step may be performed prior to the granulation step. That is, before supplying the first and second materials to the granulator 10, these materials may be kneaded using a mixer or the like.

  In the said embodiment, the case where the process of adding water to a granulated material was not performed was illustrated. However, such a hydration step may be performed prior to the granulation step. That is, before supplying the 1st and 2nd material to the granulator 10, you may add water to either or both of these materials.

  In the said embodiment, the case where the 1st and 2nd material was grind | pulverized by a separate grinder (pulverizers 20 and 22) was illustrated. However, these materials may be pulverized by the same pulverizer.

  In the said embodiment, the water absorption processing material 30 of the multilayer structure which consists of the granular core part 32 and the coating layer part 34 was shown. However, it is not essential to provide the covering layer portion 34. That is, the water absorption treatment material 30 may have a single layer structure including only the granular core portion 32.

DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus 10 Granulator 20 Crusher 22 Crusher 30 Water absorption treatment material 32 Granular core part 34 Covering layer part

Claims (20)

Including a granulation step of forming a granulated material by granulating a granulated material consisting of only the first material and the second material having a moisture content smaller than that of the first material;
The method for producing a water-absorbing treatment material, wherein the first and second materials are the same material selected from pulp sludge, tea husk, plastics, and okara . In the manufacturing method of the water absorption processing material of Claim 1,
When the moisture content of the first and second materials is R1 (% by weight) and R2 (% by weight), respectively.
The manufacturing method of the water absorption processing material which is R1-R2> = 20. In the manufacturing method of the water absorption processing material of Claim 2,
The manufacturing method of the water absorption processing material which is R1-R2> = 40. In the manufacturing method of the water absorption processing material in any one of Claims 1 thru | or 3,
Said second material, manufacturing method of water absorbing treatment material containing no moisture. In the manufacturing method of the water absorption processing material in any one of Claims 1 thru | or 4,
The said 1st and 2nd material is a manufacturing method of the water absorption processing material which is the said pulp sludge . In the manufacturing method of the water absorption processing material of Claim 5,
Includes a grinding step of moisture content grinding the pulp sludge in the state of more than 40 wt%,
In the granulation step, a method for producing a water-absorbing treatment material using the pulp sludge pulverized in the pulverization step as the first material. In the manufacturing method of the water absorption processing material in any one of Claims 1 thru | or 4,
The said 1st and 2nd material is a manufacturing method of the water absorption processing material which is the said tea-shell. In the manufacturing method of the water absorption processing material of Claim 7,
Includes a grinding step of moisture content grinding the tea leaves in the state of more than 45 wt%,
In the granulation step, a method for producing a water-absorbing treatment material, wherein the tea material crushed in the pulverization step is used as the first material. In the manufacturing method of the water absorption processing material in any one of Claims 1 thru | or 8,
In the granulation step, a method for producing a water-absorbing treatment material for granulating the granulated material that has not been kneaded. In the manufacturing method of the water absorption processing material of Claim 6 or 8 ,
A method for producing a water-absorbing treatment material that does not add water to the granulated material between the end of the pulverization step and the start of the granulation step . A granulator for forming a granulated material by granulating a granulated material consisting only of a first material and a second material having a moisture content smaller than that of the first material;
The said 1st and 2nd material is the same material chosen from pulp sludge, a tea-shell, plastics, and okara, The manufacturing apparatus of the water-absorbing treatment material characterized by the above-mentioned. In the manufacturing apparatus of the water absorption processing material of Claim 11,
When the moisture content of the first and second materials is R1 (% by weight) and R2 (% by weight), respectively.
An apparatus for producing a water-absorbing treatment material satisfying R1-R2 ≧ 20. In the manufacturing apparatus of the water-absorbing treatment material according to claim 12,
An apparatus for producing a water-absorbing treatment material satisfying R1-R2 ≧ 40. In the manufacturing apparatus of the water absorption processing material in any one of Claims 11 thru | or 13,
It said second material production apparatus of the water treatment material containing no moisture. In the manufacturing apparatus of the water absorption processing material in any one of Claims 11 thru | or 14,
The said 1st and 2nd material is a manufacturing apparatus of the water absorption processing material which is the said pulp sludge . In the manufacturing apparatus of the water absorption treatment material according to claim 15,
Comprising a mill moisture content grinding the pulp sludge in the state of more than 40 wt%,
The granulator is a water-absorbing material manufacturing apparatus that uses the pulp sludge pulverized by the pulverizer as the first material. In the manufacturing apparatus of the water absorption processing material in any one of Claims 11 thru | or 14,
The said 1st and 2nd material is a manufacturing apparatus of the water absorption processing material which is the said tea shells. In the manufacturing apparatus of the water absorption treatment material according to claim 17,
Comprising a mill moisture content grinding the tea leaves in the state of more than 45 wt%,
The granulator is an apparatus for producing a water-absorbing treatment material that uses the tea shells crushed by the pulverizer as the first material. In the manufacturing apparatus of the water absorption processing material in any one of Claims 11 thru | or 18,
The granulator is a water-absorbing material manufacturing apparatus for granulating the granulated material that has not been kneaded. In the manufacturing apparatus of the water absorption treatment material according to claim 16 or 18 ,
An apparatus for producing a water-absorbing treatment material that does not add water to the granulated material between the end of pulverization by the pulverizer and the start of granulation by the granulator .

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