SCR (Selective Catalytic Reduction) denitration catalyst mold

Abstract

The utility model discloses an SCR (Selective Catalytic Reduction) denitration catalyst mold which comprises a forming steady flow section (2), the forming steady flow section (2) is formed by a plurality of forming bosses (4) which are arranged in order and have rectangular sections, and equal gaps are arranged among the forming bosses (4); the four forming boss convex corners (6) on the section rectangle of each forming boss (4) are in arc transition, and forming boss arc corners (7) are formed. By adopting the technical scheme, dust is prevented from forming a dead angle at the sharp corner position, and the situation that the service life of an SCR denitration catalyst product is affected due to too fast dust accumulation is avoided; the processing is simple, and the use cost of the SCR denitration catalyst product is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of SCR denitration catalyst mold system engineering. More specifically, the utility model relates to a molding and flow stabilization specific structure of an SCR denitration catalyst mold. Background Art

[0002] like Figure 1 , Figure 2 and Figure 3 As shown, in the prior art, the SCR denitration catalyst mold 5 includes: a feed hole 1, a molding steady flow section 2, an extruder connection hole 3, and a molding boss 4. The molding steady flow section 2 is formed by a plurality of neatly arranged molding bosses 4 with a rectangular cross section.

[0003] Figure 4 It is a schematic diagram of an enlarged molding boss 4, wherein equal gaps are provided between the molding bosses 4; the four corners of the rectangular cross section of each molding boss 4 are molding boss convex corners 6. The molding boss convex corners 6 are sharp angles of 90°.

[0004] At present, this type of structure has the following disadvantages:

[0005] 1. The molding boss of this mold is a sharp-angle model, because the SCR denitration catalyst products produced by this type of product are mainly used for tail gas denitration in cement kilns and power plants. In actual use, due to the existence of sharp corners, dust has formed dead corners at the sharp corners, causing dust to accumulate too quickly, affecting the service life of the SCR denitration catalyst products;

[0006] 2. If the above problems are not effectively solved, the SCR denitrification catalyst product needs to be replaced in time, thereby increasing the use cost of the SCR denitrification catalyst product.

[0007] Using keywords such as "SCR; denitration catalyst; mold" to search existing public technical literature, the following results were obtained:

[0008] 1. Chinese patent document: "A SCR denitration catalyst extrusion die", patent (application) number: 201720399321.2, the technical solution recorded is as follows:

[0009] The "SCR denitration catalyst extrusion die comprises a main body, a template is arranged inside the main body, an extrusion device is arranged inside the template, a die pin is arranged inside the extrusion device, an extrusion groove is arranged at the bottom of the die pin, a conical hole is arranged on one side of the extrusion groove, a feed hole is arranged on one side of the conical hole, a turntable is arranged on the conical hole, a servo motor is arranged on the top of the die pin, a transmission screw is arranged at the bottom of the servo motor, a barb is arranged on the template, a pressure valve is arranged on one side of the feed hole, and a piston rod is arranged on one side of the pressure valve";

[0010] The technical effects recorded are:

[0011] "By setting a turntable, we can prevent the conical hole from being blocked, so that the catalyst can be extruded normally and the extrusion device can be unblocked normally. By setting a barb, the template can be easily separated from the fixed frame, which makes it easier to replace the template and expand the application range. By setting a piston rod to extrude the catalyst, the extrusion rate and extrusion quality can be increased."

[0012] 2. Chinese patent document: "A detachable extrusion die for SCR denitration catalyst", patent (application) number: 201610733392.1, the technical solution recorded is as follows:

[0013] “An extrusion die and an extrusion die fixing plate are arranged on the extruder, and the extrusion die is connected to the extruder body through the fixing plate; a fixing bolt through hole is arranged on the fixing plate; a fixing bolt hole is arranged on the extruder; a fixing bolt passes through the fixing bolt through hole and enters the fixing bolt hole to fix the fixing plate on the extruder; an electromagnetic suction strip is arranged in the fixing bolt through hole; when the electromagnetic suction strip is energized, a magnetic force is generated to fix the fixing bolt in the fixing bolt through hole”;

[0014] The technical effects recorded are:

[0015] The extrusion die "is directly installed on the extruder when in use. When the product specifications and length need to be changed, the production change can be easily achieved by adjusting the telescopic fixed arm. There is no need to remove the extrusion head in use and then replace it. The device can be adjusted in a timely manner very conveniently, thereby greatly improving production efficiency and reducing labor intensity."

[0016] However, the technical solutions recorded in the above-mentioned existing publicly available relevant technical documents have not been able to solve the problems and defects existing in the SCR deNOx catalyst mold in the prior art, namely, "due to the existence of sharp corners, dust has formed dead corners at the sharp corners, causing dust to accumulate too quickly, affecting the service life of the SCR deNOx catalyst product" and "the use cost of the SCR deNOx catalyst product is relatively high". Utility Model Content

[0017] The utility model provides an SCR denitration catalyst mold, the purpose of which is to increase the service life of the SCR denitration catalyst product.

[0018] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0019] The SCR denitration catalyst mold of the utility model comprises a molded stabilizing flow section, which is formed by a plurality of neatly arranged molded bosses with rectangular cross-sections, and equal gaps are arranged between the molded bosses; the four molded boss convex corners on the cross-sectional rectangle of each molded boss are all arc transitions, forming molded boss arc corners.

[0020] The arc transition is processed by wire cutting, and the distribution of the wire cutting path is as follows: at the junction of the convex corners of the four forming bosses, the wire cutting path is a hollow "X" shape, and the shape of the four inner corners of the hollow "X" shape is consistent with the shape of the arc angle of the forming boss; at the junction of the two convex corners of the forming boss at the outer edge of the forming steady flow section, the wire cutting path is a hollow "T" shape, and the shape of the two inner corners of the hollow "T" shape is consistent with the shape of the arc angle of the forming boss.

[0021] After the forming boss is formed, the working side surface thereof is polished; a nickel-plated layer is arranged on the working side surface thereof, and the thickness of the nickel-plated layer is 0.05-0.0 mm.

[0022] The surface roughness of the nickel plating layer is Ra0.13-Ra0.15.

[0023] The feed holes of the denitration catalyst mold are all arranged at positions corresponding to the junction of the convex corners of the molding bosses.

[0024] A plurality of extruder connection holes are arranged near the outer edge of the template of the denitration catalyst mold, and the denitration catalyst mold is connected to the extruder through the extruder connection holes.

[0025] A plurality of pressing plate connecting holes are arranged on the template of the denitration catalyst mold; the forming steady flow section is positioned on the template of the denitration catalyst mold through the pressing plate; and the pressing plate is fastened to the template of the denitration catalyst mold through the pressing plate connecting holes.

[0026] The utility model adopts the above technical solution to avoid dust from forming dead corners at sharp corners, thereby solving the problem that the sharp corners cause dust to accumulate too quickly and affect the service life of the SCR denitration catalyst product; the processing is simple and the use cost of the SCR denitration catalyst product is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The contents shown in the attached drawings and the symbols in the drawings are briefly described as follows:

[0028] Figure 1 This is a schematic diagram of the front structure of the denitrification mold;

[0029] Figure 2 for Figure 1 A schematic diagram of the left side of the structure shown;

[0030] Figure 3 for Figure 1 A schematic top view of the structure shown;

[0031] Figure 4 for Figure 1 Schematic diagram of the enlarged part of the extrusion;

[0032] Figure 5 This is a schematic diagram of the improved forming boss structure of the utility model;

[0033] Figure 6 It is a schematic diagram of the structure of the hollow "cross" shape in the utility model;

[0034] Figure 7 It is a schematic diagram of the structure of the hollow "T" shape in the utility model;

[0035] Figure 8 It is a schematic diagram of the pressing plate structure in the utility model.

[0036] The markings in the figure are:

[0037] 1. Feed hole, 2. Molding steady flow section, 3. Extruder connection hole, 4. Molding boss, 5. DeNOx catalyst mold, 6. Molding boss convex corner, 7. Molding boss arc corner, 8. Press plate connection hole, 9. Press plate, 10. Hollow "X" shape, 11. Hollow "T" shape. DETAILED DESCRIPTION

[0038] The specific implementation methods of the utility model are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the utility model.

[0039] like Figure 1 to Figure 3 , Figures 5 to 8 The structure of the utility model shown is a SCR denitration catalyst mold, including a molded flow stabilizing section 2, the molded flow stabilizing section 2 is formed by a plurality of neatly arranged, rectangular-section molded bosses 4, and equal gaps are provided between the molded bosses 4. The SCR adopts the selective catalytic reduction flue gas denitration technology.

[0040] In order to solve the problems existing in the prior art and overcome its defects, and to achieve the invention purpose of increasing the service life of the SCR denitration catalyst product, the technical solution adopted by the utility model is:

[0041] like Figure 5 As shown, in the SCR denitration catalyst mold of the present invention, the four molding boss convex corners 6 on the cross-sectional rectangle of each molding boss 4 are all arc transitions, forming molding boss arc corners 7.

[0042] The above technical solution of the utility model changes the shape of the forming boss so that the four corners of the forming boss 4 become arc transitions. The arc surface can prevent dust from forming dead corners at the corners, and will not cause dust to accumulate too quickly and affect the service life of the SCR denitration catalyst product.

[0043] The arc transition is processed by wire cutting, and the distribution of the wire cutting path is as follows: at the junction of the forming boss convex corners 6 of the four forming bosses 4, the wire cutting path is a hollow "cross" shape 10, and the shape of the four inner corners of the hollow "cross" shape 10 is consistent with the shape of the forming boss arc corner 7; at the junction of the two forming boss convex corners 6 on the outer edge of the forming steady flow section 2, the wire cutting path is a hollow "T" shape 11, and the shape of the two inner corners of the hollow "T" shape 11 is consistent with the shape of the forming boss arc corner 7.

[0044] like Figure 6 and Figure 7 The hollow "cross" shape 10 and the hollow "T" shape 11 shown are the trajectories of the wire cutting process. The utility model solves the problem of forming a dead angle at the sharp corner by changing the shape of the forming boss 4 and forming it by wire cutting so that the sharp corner is changed into a rounded corner. Figure 5 As shown: through the trajectory of the hollow "X" shape 10 and the hollow "T" shape 11, it is possible to ensure that the shape of the arc corner 7 of the formed boss is cut, and at the same time, the cutting path is greatly shortened, and the intersection with the plane is smoother.

[0045] After the molding boss 4 is formed, the working side thereof is polished; a nickel plating layer is provided on the working side thereof, the thickness of the nickel plating layer is 0.05 to 0.07 mm, and the surface roughness of the nickel plating layer is Ra0.13 to Ra0.15.

[0046] The processing technology is as follows: first, the forming boss 4 is processed, and then each arc angle is processed by wire cutting. After the processing is completed, it is polished and the surface is nickel-plated. The thickness of the nickel plating layer is controlled at 0.05-0.07mm, so that the surface roughness reaches Ra0.13-Ra0.15.

[0047] The feed holes 1 of the denitration catalyst mold 5 are all arranged at positions corresponding to the junctions with the convex corners 6 of the molding bosses.

[0048] like Figure 1 As shown, the feed hole 1 and the forming boss 4 are staggered, and the feed directly enters the gap of the forming boss 4 to ensure smooth feeding.

[0049] A plurality of extruder connection holes 3 are provided near the outer edge of the template of the denitration catalyst mold 5 , and the denitration catalyst mold 5 is connected to the extruder through the extruder connection holes 3 .

[0050] A plurality of pressing plate connecting holes 8 are arranged on the template of the denitration catalyst mold 5; the forming steady flow section 2 is positioned on the template of the denitration catalyst mold 5 through a pressing plate 9; and the pressing plate 9 is fastened to the template of the denitration catalyst mold 5 through the pressing plate connecting holes 8.

[0051] The molded steady flow section 2 is positioned in its cavity by a pressing plate 9 and fixed to the template of the denitration catalyst mold 5 by bolts to ensure that the extruded material flows in the molded steady flow section 2 .

[0052] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A SCR denitration catalyst mold, comprising a molded flow stabilizing section (2), wherein the molded flow stabilizing section (2) is formed by a plurality of neatly arranged molded bosses (4) with rectangular cross-sections, wherein equal gaps are provided between the molded bosses (4); characterized in that: The four molding boss convex corners (6) on the cross-sectional rectangle of each molding boss (4) are all arc transitions, forming molding boss arc corners (7).

2. The SCR denitration catalyst mold according to claim 1, characterized in that: The arc transition is processed by wire cutting, and the distribution of the wire cutting path is as follows: at the junction of the forming boss convex corners (6) of the four forming bosses (4), the wire cutting path is a hollow "cross" shape (10), and the shape of the four inner corners of the hollow "cross" shape (10) is consistent with the shape of the forming boss arc corner (7); at the junction of the two forming boss convex corners (6) at the outer edge of the forming stabilizing flow section (2), the wire cutting path is a hollow "T" shape (11), and the shape of the two inner corners of the hollow "T" shape (11) is consistent with the shape of the forming boss arc corner (7).

3. The SCR denitration catalyst mold according to claim 1, characterized in that: After the molding boss (4) is machined and formed, its working side surface is polished; A nickel-plated layer is arranged on the working side surface, and the thickness of the nickel-plated layer is 0.05-0.07 mm.

4. The SCR denitration catalyst mold according to claim 3, characterized in that: The surface roughness of the nickel plating layer is Ra0.13-Ra0.

15.

5. The SCR denitration catalyst mold according to claim 1, characterized in that: The feed holes (1) of the denitration catalyst mold (5) are all arranged at positions corresponding to the junctions of the molding boss convex corners (6).

6. The SCR denitration catalyst mold according to claim 1, characterized in that: A plurality of extruder connection holes (3) are provided at a position close to the outer edge of the template of the denitration catalyst mold (5), and the denitration catalyst mold (5) is connected to the extruder via the extruder connection holes (3).

7. The SCR denitration catalyst mold according to claim 1, characterized in that: A plurality of pressing plate connecting holes (8) are arranged on the template of the denitration catalyst mold (5); the molded flow stabilizing section (2) is positioned on the template of the denitration catalyst mold (5) via a pressing plate (9); and the pressing plate (9) is fastened to the template of the denitration catalyst mold (5) via the pressing plate connecting holes (8).

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