JP3743816B2 - Method and apparatus for producing plate catalyst - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plate-shaped catalyst manufacturing method and apparatus for supporting a catalyst for removing nitrogen oxides and the like in exhaust gas. The plate-like catalyst in the present invention includes not only a catalyst having a so-called plate shape having a rectangular cross-sectional shape but also a so-called corrugated catalyst having a corrugated cross-sectional shape.
[0002]
[Prior art]
In general, an ammonia catalytic reduction method is widely adopted as a method for removing nitrogen oxides emitted from boilers for thermal power generation and various factories. The shape of the catalyst for removing nitrogen oxide (hereinafter referred to as “denitration catalyst”) used for this includes a plate shape (plate shape catalyst), a honeycomb shape, and a granular shape. Such a denitration catalyst is required to have various characteristics. One of them is that the denitration catalyst is not easily worn by dust in the combustion exhaust gas. As other characteristics, it is required not only that the denitration performance is good, but also that the pressure loss be small.
[0003]
In order to reduce the pressure loss when the exhaust gas passes through the denitration catalyst, a plate-shaped catalyst that has a plane parallel to the flow direction of the exhaust gas and reduces clogging of dust in the combustion exhaust gas, that is, a plate-shaped catalyst is often used. The In the plate-like catalyst, a woven fabric such as a metal, glass or ceramic fiber is used as the plate-like substrate.
[0004]
FIG. 5 is a perspective view showing an apparatus for producing a plate catalyst according to the prior art. This plate-shaped catalyst manufacturing apparatus is disclosed in Japanese Patent Application Laid-Open No. 7-213920, and supplies a catalyst paste 54 in which a catalyst is pasted on a plate-shaped substrate 53, and a pair of rotating supports. Insert between the lower roll 16 and the upper roll 17. Thus, the catalyst is carried on the plate-like base material 53 inserted between the pair of rotating rolls, and the plate-like catalyst 52 is formed. At this time, in order to prevent the catalyst paste 54 from adhering to the surfaces of the lower roll 16 and the upper roll 17, the plate-like base material 53 has an upper sheet 14 and a lower sheet having a width wider than the width of the plate-like base material 53. 5 and inserted between a pair of rolls.
[0005]
The upper sheet 14 that has passed between the upper roll 17 and the lower roll 16 is taken up by the upper sheet take-up roll 20. Similarly, the lower sheet 5 is reversed by the reversing roll 26 and wound around the lower sheet winding roll 22.
[0006]
[Problems to be solved by the invention]
The plate-shaped catalyst manufacturing apparatus supplies the catalyst paste 54 wider than the width of the plate-like substrate 53 in order to carry the catalyst paste 54 uniformly and reliably on the surface of the plate-like substrate 53. Since the catalyst paste 54 is adjusted so as to increase the adhesion strength so as not to peel from the plate-like base material 53, it has strong adhesiveness. For this reason, the catalyst paste that protrudes outside the plate-like substrate 53 adheres to the sheet located outside the plate-like substrate 53 with a strong adhesive force.
[0007]
When white paper is used for the lower sheet 5 and kraft paper is used for the upper sheet 14, most of them adhere to the lower sheet 5 from experience. Since the upper and lower sheets are made of paper, they absorb the moisture of the catalyst paste 54 and easily break after loading. It is not easy to peel off the catalyst adhering to the upper and lower sheets 5 and 14 without tearing the paper sheets. .
[0008]
For this reason, in the plate-shaped catalyst manufacturing apparatus, the catalyst paste adhering to the lower sheet 5 is once pressed against the heating roller and dried, and the place where the catalyst is transferred to the heating roller is peeled off with a blade. . However, this manufacturing apparatus requires a heat source for heating the heating roller, and it is difficult to handle the heating roller because the heating roller is heated before the work starts, or the temperature control is turned off when the work is interrupted.
[0009]
An object of the present invention is to directly peel off the catalyst paste attached to the sheet without breaking the sheet.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention, when stripping off the catalyst paste attached to the sheet, presses the side of the thin plate against the sheet surface side with a constant force, and relatively moves the side of the thin plate along the sheet surface. It is characterized by. By pressing the side of the thin plate against the sheet surface side with a constant force, the thin plate is prevented from being lifted with respect to the sheet surface or the attached catalyst paste, and an excessive force is not applied to the sheet. By relatively moving the side of the thin plate along the sheet surface, the side of the thin plate peels off the catalyst paste attached to the sheet surface.
[0011]
When the sheet absorbs moisture from the attached catalyst paste, the strength of the sheet is weakened. Therefore, the side of the thin plate is pressed against the sheet surface side with a constant force. As the constant force, for example, the elastic force of an elastic material may be used. If the side of the thin plate is pressed more strongly than necessary to the sheet surface side, an unreasonable force is naturally applied to the sheet, and the sheet is torn. Therefore, it is desirable that the sheet has a certain degree of strength and is not easily torn even when moisture is attached. For example, paper is used. When white paper is used for one of the two sheets and kraft paper is used for the other, experience shows that most of the catalyst paste adheres to the white paper. The catalyst paste is easily peeled off by pressing with a constant force that does not tear the sheet.
[0012]
Further, the side of the thin plate is relatively moved along the sheet surface. In this case, the sheet may move and the thin plate may be fixed, or the sheet may be fixed and the thin plate may move. If the sheet is rewound from one roll and wound on the other roll, the sheet moves, so the thin plate is fixed. By doing in this way, the catalyst paste adhering to the sheet surface is peeled off from the side of the thin plate.
[0013]
The thin plate only needs to be able to peel off the catalyst paste attached to the sheet, but has a certain degree of rigidity, and is easier to peel off if the tip side is straight and sharp. Therefore, a blade formed of metal, resin or the like is preferably used.
[0014]
When pressing the side of the thin plate against the surface of the sheet to which the catalyst paste is adhered, the surface opposite to the surface of the sheet to which the catalyst paste is adhered, i.e. Can be reliably pressed against the seat surface side. In addition, it is preferable that the surface supporting the anti-plate-like substrate surface of the sheet moves together with the sheet because unnecessary force is less applied to the sheet. From this point, it is preferable to use a guide roll that rotates as the sheet moves as a supporting surface, that is, a reverse roll described later.
[0015]
Incidentally, the plate-like substrate is a core material on which the catalyst is supported, and is formed of, for example, expanded metal, ceramic fiber, or the like, and has a plate shape. In addition, the plate-like base material in the present invention includes a so-called corrugated plate having a corrugated cross-sectional shape as well as a so-called plate shape having a rectangular cross-sectional shape.
[0016]
Next, a pair of rotating rolls may be provided to support the catalyst on the plate-like substrate whose surface is supplied with the catalyst paste. The pair of rotating rolls sandwiches the plate-like substrate supplied with the catalyst paste, presses the catalyst paste supplied to the surface of the plate-like substrate, and supports the catalyst on the plate-like substrate. In this case, in order to prevent the catalyst paste supplied to the surface of the plate-like substrate from adhering to the surface of the rotating roll, sheet feeding means for supplying a sheet between the roll surface of the rotating roll and the plate-like substrate is provided. It is good to prepare. This sheet feeding means prevents the catalyst paste attached to the surface of the plate-like base material from attaching to the surface of the rotating roll.
[0017]
Furthermore, it is provided in contact with the opposite plate-like base material surface of the sheet that has passed between the pair of rotating rolls, and the guide roll that guides the sheet, the roll surface of the guide roll facing the roll surface, and the roll surface direction And a thin plate provided by being biased with a constant pressing force. The front end of the thin plate faces the sheet surface and is urged with a constant pressing force in the roll surface direction, but the sheet is supported by the guide roll without escaping. Further, since the thin plate is pressed in the roll surface direction with a constant pressing force, the thin plate does not lift and the catalyst paste is easily peeled off.
[0018]
Furthermore, it is good to provide the space | interval control means which controls the minimum value of the space | interval of the roll surface of a guide roll, and the front-end | tip of a thin plate. In order to regulate the minimum value of the distance between the roll surface of the guide roll and the tip of the thin plate, a minimum value is set in advance and the minimum value is restricted. The minimum value can be set to the thickness of the sheet, for example. In this case, the tip of the thin plate is in contact with the sheet surface. When the thickness is set to be larger than the thickness of the sheet, the sheet is difficult to tear, but there is a possibility that the peeled state of the catalyst paste attached to the sheet may be insufficient. When set to be smaller than the thickness of the sheet, the sheet is easily torn, but the peeled state of the catalyst paste attached to the sheet is improved. It is set appropriately in consideration of the operating conditions of the apparatus, the type of sheet, the properties of the catalyst paste, and the like.
[0019]
By regulating the minimum value of the distance between the roll surface of the guide roll and the tip of the thin plate, the tip of the thin plate is positioned at a distance greater than the minimum value with respect to the roll surface, and the sheet surface is forcibly pressed. Without tearing the sheet. This is because, for example, a thick part due to variations in the thickness of the sheet or a part where a hard object adheres to the sheet bites into the gap, and the thin plate moves backward when a force exceeding a certain force is applied from the sheet surface to the thin plate. And protect the sheet and equipment.
[0020]
Further, as a space regulating means, a support piece is provided with a base end pivotally supported by the apparatus main body and a rotatable arm provided on the reversing roll side, and a thin plate attached to the front end side of the arm so as to be inserted and removed in the reversing roll direction. And a roller in contact with the reversing roll may be provided. By rotating the arm toward the reversing roll and the roller abuts the reversing roll, the distance between the front end (side) of the thin plate and the sheet surface can be regulated to be constant by adjusting the thin plate in the reversing roll direction. it can. At this time, it is preferable to have an elastic material that urges the arm toward the reverse roll. The elastic material urges the arm to the reverse roll side, and when an unexpected force exceeding a certain force is applied to the thin plate due to the biting of foreign matter between the thin plate and the sheet, the arm rotates and retracts, Prevents tearing of sheets and damage of equipment. As the elastic material, metal, rubber, resin, or the like is used, and as a shape, a spring such as a spring, a string, or a plate is appropriately used.
[0021]
In the above description, the thin plate peels off the catalyst paste attached to the sheet. In particular, the catalyst paste is attached to the plate-like substrate by sandwiching a sheet wider than the plate-like substrate under the plate-like substrate. When the catalyst paste is used, the catalyst paste adheres in a strip shape on both sides of the sheet. In this case, the thin plates are respectively disposed so as to face the sheet surfaces on the left and right edge sides.
[0022]
Further, in the present invention, when the catalyst paste adheres to both of the two sheets sandwiching the plate-like substrate, the catalyst paste attached to both of the two sheets by the method or apparatus described above is similarly applied. Can be peeled off. Further, the present invention can be applied even when the plate-like catalyst is a wave-shaped catalyst. In this case, the surface shapes of the pair of rotating rolls are of course matched to the wave shape.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the plate catalyst production method and apparatus of the present invention will be described with reference to the drawings. 1 to 4, the same structure and action parts are denoted by the same reference numerals.
[0024]
FIG. 2 is a perspective view showing an embodiment of an apparatus used for carrying out the method for producing a plate catalyst according to the present invention. The plate-shaped catalyst manufacturing apparatus of this embodiment includes a pair of rotary rolls 16 and 17 that sandwich a plate-like base material 53 supplied with a catalyst paste 54 on the surface and carry the catalyst on the plate-like base material 53, and the rotary rolls. The sheet feeding device (sheet feeding means) 18 a that feeds the lower sheet 5 between the roll surface 16 and the plate-like substrate 53 and the upper sheet 14 is fed between the roll surface of the rotary roll 17 and the plate-like substrate 53. A sheet feeding device (sheet feeding means) 18b.
[0025]
Furthermore, the plate-shaped catalyst manufacturing apparatus is provided in contact with the opposite plate-like substrate surface of the lower sheet 5 that has passed between the rotary rolls 16 and 17, and a reversing roll (guide roll) 25 that guides the lower sheet 5; The two blades (thin plate) 29 provided opposite to the roll surface of the reversing roll 25 and biased with a constant pressing force in the roll surface direction, the roll surface of the reversing roll 25 and the tip of the blade 29 Is provided with an interval restricting device (interval restricting means) 33 (indicated in FIG. 1) for restricting the minimum value of the interval.
[0026]
The plate-like catalyst manufacturing apparatus supplies a catalyst paste 54, which is a paste-like catalyst, to a plate-like base material 53 on which the catalyst is supported, and then sandwiches the lower sheet 5 and the upper sheet 14 with a pair of upper and lower sheets. The catalyst paste 54 is supported on the plate-like base material 53 to form a plate-like catalyst 52, and the catalyst paste 56 attached to the sheet is peeled off. The plate-shaped catalyst manufactured by this apparatus is used as a catalyst for removing nitrogen oxides contained in exhaust gas, for example. The catalyst paste adhering to the sheet is supported by the catalyst paste adhering to the outer sheet when the catalyst paste is adhering to the plate-like substrate 53, and the upper and lower rolls supporting the catalyst on the plate-like substrate 53. In this case, the catalyst paste that protrudes from the plate-like substrate 53 side to the sheet side is also included.
[0027]
The plate-like base material 53 is a core material on which the catalyst is carried, and is formed of expanded metal, ceramic fiber, or the like and has a strip shape. The upper sheet 14 and the lower sheet 5 are for preventing the catalyst paste 54 from adhering to the surfaces of the pair of rotary rolls 16, 17. Between. The lower sheet 5 uses, for example, a white paper to which the catalyst paste is easily attached, and adsorbs the catalyst paste 56 attached to the sheet.
[0028]
The pair of rotary rolls 16 and 17 are arranged so that the axial directions thereof are parallel to each other, and carry the catalyst on the plate-like base material 53 by rotating.
[0029]
The sheet feeding devices 18 a and 18 b that supply the lower sheet 5 and the upper sheet 14 are moved between the roll surfaces of the rotating rolls 16 and 17 and the plate-like substrate 53 in accordance with the rotation of the rotating rolls 16 and 17. , 14, an upper sheet feeding roll 19 for feeding the upper sheet 14, an upper sheet winding roll 20 for winding the upper sheet, a lower sheet feeding roll 21 for feeding the lower sheet 5, and a lower sheet for winding the lower sheet It has a winding roll 22, a reversing roll 23 arranged on the feeding side of the lower sheet 5, and a reversing roll 24, 25 arranged on the winding side of the lower sheet.
[0030]
The rotation axes of the upper sheet delivery roll 19, the upper sheet take-up roll 20, the lower sheet delivery roll 21, the lower sheet take-up roll 22, the reverse rolls 23, 24, 25, and the like are parallel to each other, and the upper roll 16 and the lower roll 17 parallel to the rotation axis. The lower sheet 5 is reversed from the lower sheet delivery roll 21 by the reversing roll 23, passed between the upper and lower rolls 17, 16, then turned downward by the reversing roll 24, and the surface 25 b of the reversing roll 25. Is moved while being bent while being supported on the surface opposite to the surface on which the catalyst paste is adhered, and is taken up by the lower sheet take-up roll 22.
[0031]
FIG. 1 is a perspective view of a main part of a part where the catalyst paste attached to the lower sheet of the apparatus shown in FIG. 2 is peeled off, and shows only one side of the part to be peeled, but is on both sides of the apparatus. The part where the catalyst paste 56 attached to the lower sheet 5 is peeled off includes a reversing roll 25 that changes the direction of the lower sheet 5 downward, and a blade 29 that peels off the catalyst paste 56 attached to the lower sheet 5 at its tip 30. Including the above-described interval regulating device 33. The lower sheet winding roll 22 is driven by a driving device 31.
[0032]
An interval regulating device 33 that regulates the minimum value of the interval between the roll surface 25b of the reversing roll and the tip 30 of the blade is pivotally supported by the pin 40 on the base end side of the rotating metal fitting 36 on the fixed side and can be turned to the reversing roll 25 side. Arm 38 and a tension spring 48 as an elastic material for urging the arm 38 toward the reversing roll 25. The arm 38 is provided on the left and right sides of the reversing roll 25 so as to face the reversing roll 25, and is fixed to a support base 35 attached to the apparatus main body 50.
[0033]
The arm 38 is attached to the rotating metal fitting 36 fixed to the rotating metal fitting 36, the rotating metal fitting 39 fixed to the rotating metal fitting 39, and the connecting metal fitting 41. A blade holder 42. The blade receiving base 42 is provided with a blade support piece (support piece) 42a on which the blade 29 is movably attached in the direction of the reverse roll 25 and a guide roller (roller) 44 that comes into contact with the reverse roll 25. The blade 29 and the blade support piece 42 a are provided with an opening groove 29 a in the blade 29 and are fixed to the blade support piece 42 a with a fixing bolt 45.
[0034]
The blade 29 movably attached to the blade support piece 42a is in a position tangential to the reversing roll 25, and the length of the blade 29 is meandering while the plate-like substrate 53 passes through the rotary rolls 16 and 17. In order to ensure that the catalyst paste 56 attached to the lower sheet 5 is peeled off, the length of the lower sheet edge is covered to the outside in the width direction from the position of 10 mm from the width of the plate-like base material 53 and attached to the sheet. It is provided at a position where all of the catalyst paste 56 can be peeled off. In addition, the space regulating device 33 is provided with an air cylinder 49 that rotates the blade 29 attached to the arm 38 in a direction in which the blade 29 is pulled away from the reversing roll 25.
[0035]
FIG. 3 is a side view of the main part of FIG. Two guide rollers 44 provided on each blade receiving table 42 abut on the roll surface of the reversing roll 25, and the positional relationship between the blade receiving table 42, and therefore the blade 29 and the reversing roll 25, or the side of the tip of the blade 29. And the positional relationship between the lower sheet surface and the lower sheet surface. The blade 29 fixed to the blade support piece 42 a of the blade holder by the fixing bolt 45 is the other direction 11 indicated by the arrow 11 opposite to the one direction indicated by the arrow 10 in which the lower sheet 5 moves, that is, the reversing roll 25. It is inclined tangentially. The tip side of the blade 29 is pointed like a wedge in a straight line parallel to the rotation axis 25a of the reversing roll 25. Further, the guide roller 44 of the blade holder is disposed so as to straddle the axis of the reversing roll 25. Reference numeral 58 denotes a peeled catalyst paste, which is recovered as a raw material of the catalyst paste.
[0036]
The plate-shaped catalyst manufacturing apparatus of the present embodiment having the above-described structure operates as follows. That is, as shown in FIG. 1, when the lower sheet 5 to which the catalyst paste is attached is moved, the lower surface 8 of the lower sheet (sheet anti-plate-like base material surface) 8 contacts and supports the roll surface 25 b of the reversing roll 25. It is done. The upper surface 7 of the lower sheet is located away from the surface of the reversing roll 25 by the thickness of the lower sheet 5. Since the minimum value of the distance between the tip edge of the blade and the roll surface 25b is regulated by the distance regulating device 33, the blade 29 does not forcibly bite into the lower sheet 5 and an excessive force is applied. In addition, the catalyst paste 56 attached to the lower sheet 5 can be peeled off without breaking the lower sheet 5 that has weakened by absorbing the moisture of the catalyst paste.
[0037]
Furthermore, if the lower surface 8 of the lower sheet is supported by the roll surface 25b of the reverse roll, the lower sheet 5 also moves with the rotation of the reverse roll 25, and the lower sheet 5 cannot slide relative to the reverse roll 25, or Relative slip can be reduced. By supporting in this way, the support state of the lower sheet 5 is stabilized and the lower sheet 5 can be prevented from being torn.
[0038]
Furthermore, the position of the blade support piece 42a is determined by rotating the arm 38 to the reverse roll 25 side and bringing the guide roller 44 into contact with the reverse roll 25, and the blade 29 is placed on the blade support piece 42a. The minimum value of the distance between the roll surface 25b and the blade tip 30 can be set constant by adjusting the movement direction in 25 directions. Further, by providing a tension spring 48 that urges the arm 38 toward the reversing roll 25, the arm 38 is pressed against the reversing roll, and when the force exceeding a certain force is applied to the blade, the blade retreats, and the sheet and Protect equipment.
[0039]
Next, the plate-shaped catalyst production apparatus will be described in more detail.
[0040]
As shown in FIG. 2, the catalyst paste 54 is attached to the surface of the plate-like base material 53 that is the core of the plate-like catalyst 52, and the upper sheet 14 is placed on the upper surface of the plate-like base material 53. The lower sheet 5 is inserted and sandwiched between the lower and rear surfaces of the sheet 53, and the plate-like substrate 53 is inserted into the gap between the rotating upper roll 16 and the lower roll 17, and the plate-like substrate 53, the upper sheet 14, and the lower sheet 5 are inserted. While being sent out in the directions of arrows 27 and 28, the catalyst paste 54 is pressed and supported on the plate-like base material 53 to form the plate-like catalyst 52. The formed plate-like catalyst 52 is cut into a predetermined size and baked to become a denitration catalyst.
[0041]
In the above process, the catalyst paste 54 is compressed by the upper roll 16 and the lower roll 17 and is supported on the plate-like base material 53. However, the plate-like base material 53 on which the catalyst is supported and the lower sheet 5 move in an overlapping state. To do. Further, the lower sheet 5 is wound around the lower sheet winding roll 22 through the reversing rolls 24 and 25. The lower sheet winding roll 22 has a built-in powder clutch and serves to make the winding tension of the lower sheet 5 constant. Therefore, the lower sheet 5 to which the catalyst paste is attached is always subjected to a tensile force during operation between the lower rolls 16 and 17 and the lower sheet take-up roll 22 for supporting. There is no wrinkle or sagging in a state that is compatible with the roll diameter.
[0042]
When the catalyst paste attached to the outside of the plate-like substrate 53 and the plate-like substrate 53 pass between the upper and lower rolls, the catalyst paste moves to the sheet side from the plate-like substrate 53 side, that is, adheres to the catalyst paste. The adhering catalyst paste 56 adheres in the form of a band near both ends in the width direction of the lower sheet 5, and at the same time, a part of moisture is absorbed by the lower sheet 5. The lower sheet 5 easily breaks with the passage of time. However, at a conventional line speed of 7 to 8 m / min, the time from the upper roll passing through the lower roll to the lower sheet take-up roll 22 is short. Strength is retained. In this case, when craft paper is used for the upper sheet 14 and white paper is used for the lower sheet 5, most of the catalyst paste 54 adheres to the lower sheet 5 from experience. The average amount of the catalyst paste 56 attached to the lower sheet 5 is continuously attached with a thickness of 0.8 to 1 mm and a width of 30 to 50 mm.
[0043]
As shown in FIG. 3, the guide roller 44 of the blade holder is disposed so as to straddle the axis 25 a of the reversing roll 25 at the outer end in the width direction of the lower sheet 5, so that the lower sheet 5 is wound around the guide roller 44. Or tear. Further, the blade 29 has a structure in which the blade receiving base 42 is disposed so as to come into contact with the lower sheet 5 at a position tangential to the reversing roll 25, and the lower sheet 5 is sandwiched between the blade 29 and the reversing roll 25. Therefore, the cutting tool 29 is surely contacted with the catalyst paste 56 attached to the sheet, and is surely removed.
[0044]
4A and 4B show the operation of the space regulating device shown in FIG. 1, wherein FIG. 4A is a plan view of a state in which the cutter is set, and FIG. 4B is a plan view of a state in which the cutter is opened. As shown in FIG. 4A, when the work for supporting the catalyst paste is resumed and at the same time the air cylinder 49 is pulled, the guide roller 44 of the blade holder that supports the blade 29 is rotated by the reverse spring by the tension spring 48. 25, the blade 29 is provided at a position where the catalyst paste 56 attached to the lower sheet 5 can be peeled off from the plate-like base material 53, so that the blade 29 comes in contact with the lower sheet 5 and peels off the excess catalyst paste attached. . The lower the number of interruptions in the stripping operation, the higher the yield of the plate catalyst or catalyst paste.
[0045]
As described above, the guide roller 44 of the blade holder is always pressed against the reversing roll 25 by the tension spring 48, and the gap between the reversing roll 25 and the blade 29, and thus the surface of the lower sheet 5 and the side of the tip of the blade 29. Since the minimum value of the gap is regulated, the blade 29 is less likely to bite into the lower sheet 5 and break or damage even if continuously peeled.
[0046]
Further, as shown in FIG. 4B, when the lower sheet 5 is torn or the lower sheet take-up roll 22 becomes larger and is replaced, the blade 29 is released by pushing the air cylinder 49.
[0047]
In this embodiment, the reversing roll 25 has diameters of 60.5 mm and 76.3 mm, but the diameter of 76.3 mm has better efficiency for removing the catalyst paste 56 attached to the sheet. This is because the contact between the blade 29 and the lower sheet 5 becomes more stable as the diameter of the reversing roll 25 is larger. The blade 29 can sufficiently cover the width direction of the catalyst paste 56 attached to the lower sheet, and considering the meandering of the lower sheet, uses a material Sk-7 having a thickness of 1-2 mm × width 40 mm × length 90 mm, When the corner of the blade 29 is rounded (R processing), the lower sheet 5 is not damaged and is not easily torn.
[0048]
The lower sheet 5 is a white paper having a thickness of 0.1 mm and a width of 660 mm. If the moisture content of the catalyst paste is higher than the specified value, or if the peeling operation is resumed by interrupting the lower sheet 5 after loading for 1 minute or more, the moisture of the catalyst paste 56 adhering to the lower sheet is absorbed by the lower sheet 5 and easily broken. Become.
[0049]
In the above embodiment, the upper sheet 14 is formed of paper to which the catalyst paste is difficult to adhere. However, as with the lower sheet 5, the white sheet to which the catalyst paste is easy to adhere may be used to attach the catalyst paste. In this case, the apparatus of this embodiment is also provided on the upper sheet side.
[0050]
By the way, with the recent increase in interest in global environmental problems, both society and companies are shifting from resource and energy wasting production methods to environmental conservation and resource recycling. The waste generated at the factory is first recycled, and reduced as much as possible. For this reason, the catalyst paste attached to the sheet is peeled off while maintaining the conventional line speed only by providing a device for stripping the catalyst paste of the present embodiment in the existing plate-shaped catalyst manufacturing apparatus. It can be recovered. Moreover, since the peeled catalyst paste can be used as a raw material for the catalyst paste as it is, the yield of the plate catalyst or catalyst paste is improved, which is advantageous for mass production. In addition, this apparatus does not require any special power and uses an existing conveyor drive device, so there is little energy loss and also leads to reduction of industrial waste.
[0051]
【The invention's effect】
According to the present invention, the catalyst paste attached to the sheet can be peeled off directly without breaking the sheet.
[Brief description of the drawings]
FIG. 1 is a perspective view of an essential part of a peeling portion for peeling off a catalyst paste attached to a lower sheet, showing an embodiment of an apparatus used for carrying out a method for producing a plate catalyst according to the present invention.
FIG. 2 is an overall perspective view of the apparatus including the peeled portion shown in FIG.
FIG. 3 is a side view of the main part of FIG. 1;
4A and 4B show the operation of the interval regulating device of the apparatus shown in FIG. 1, in which FIG. 4A is a plan view in a state where a blade is set, and FIG. 4B is a plan view in a state where the blade is opened.
FIG. 5 is a perspective view showing an apparatus for producing a plate catalyst according to the prior art.
[Explanation of symbols]
5 Lower sheet (sheet)
14 Upper sheet (sheet)
16 Lower roll (rotating roll)
17 Upper roll (rotating roll)
18a, 18b Sheet feeding device (sheet feeding means)
25 Reverse roll
25b Roll surface
29 Cutlery (thin plate)
30 Tip
33 Spacing regulating device (spacing regulating means)
38 arms
42a Blade support piece (support piece)
44 Guide roller (roller)
48 Tension spring (elastic material)
50 Main unit
52 Plate catalyst
53 Plate base material
54 Catalyst paste (catalyst)
56 Catalyst paste adhering to the sheet

Claims (2)

Production of a plate-like catalyst in which a catalyst paste is supplied to the surface of a plate-like substrate, the plate-like substrate is sandwiched between two sheets, inserted between a pair of rotating rolls, and the catalyst is supported on the plate-like substrate. In the method, when stripping off the catalyst paste adhered to the sheet, the side of the thin plate is pressed against the sheet surface side with a constant force, and the side of the thin plate is relatively moved along the sheet surface. A method for producing a plate catalyst. A pair of rotating rolls sandwiching a plate-like base material supplied with catalyst paste on the surface and supporting the catalyst on the plate-like base material, and a sheet for supplying a sheet between the roll surface of the rotary roll and the plate-like base material A feed roll, a guide roll provided in contact with the surface of the sheet-like base material of the sheet that has passed between the pair of rotating rolls, to guide the sheet; and a roll facing the roll surface of the guide roll; An apparatus for producing a plate-shaped catalyst, comprising: a thin plate that is urged with a constant pressing force in the surface direction; and an interval regulating means that regulates a minimum value of an interval between the roll surface of the guide roll and the tip of the thin plate. .

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