Device for eliminating pulsation and vortex of slurry in automobile carrier catalyst coating

Abstract

The utility model discloses a device for eliminating pulsation and vortex of slurry in automobile carrier catalyst coating. The device comprises a slurry pulsation eliminating part and a slurry vortex eliminating part. The slurry pulsation eliminating part is positioned in the slurry loading part coated with the automobile carrier catalyst; and the slurry vortex eliminating part is positioned in the slurry loading part of the coating device and is fixed above the slurry pulsation eliminating part through a positioning groove. The device is used for eliminating the problem of non-uniform catalyst coating caused by pulsation generated by slurry conveying of a pipeline pump and slurry vortex generated by a coating cavity structure in the automobile carrier catalyst coating process, and has the advantages that the structure is simple, the maintenance is convenient and fast, the main body structure of the coating device is not changed, and the slurry characteristics are not changed; the coating device part is an ideal coating device part for eliminating the problem of non-uniform coating caused by slurry pulsation and slurry vortex when the silicon carbide / cordierite honeycomb carrier is coated.

Description

Technical Field

[0001] The utility model relates to a device for eliminating slurry pulsation and vortex in automobile carrier catalyst coating, in particular to a device for eliminating the influence of pulsation caused by slurry conveyed by a pipeline pump and slurry vortex generated by a coating cavity structure on the catalyst coating height accuracy during automobile carrier catalyst coating, and is suitable for coating automobile catalysts on silicon carbide and cyclopentane honeycomb carriers. Background Art

[0002] The uniformity of catalyst slurry coating in automotive carrier catalysts is one of the core requirements. The consistency of coating height is an important indicator to measure uniformity, and it is also a guarantee that catalyst performance meets regulations and high manufacturing quality.

[0003] During the catalyst slurry coating process, the prepared slurry is transported from the storage tank to the coating device through a pipeline pump, and the slurry is pressed into the honeycomb carrier pores from bottom to top by the pipeline pump. When the coating height required by the process is reached, the slurry stops being transported and returns to the storage tank through the recovery pipeline. At the same time, the lower part of the coating device with the carrier is connected to the vacuum generated by the vacuum generating system to suck out the residual slurry in the carrier pores to ensure that the carrier pores are unobstructed, and the slurry coating process is completed.

[0004] The consistency of the carrier slurry coating height is affected by the continuous pulsation caused by the pipeline pump conveying the slurry, the vortex caused by the cavity structure of the coating device, and the slurry characteristics [such as density (1.2Kg / m 3 -1.4Kg / m 3 ), viscosity (1000Pa.s-4000Pa.s), etc., the cross-section slurry height graph after carrier coating presents a shape of high at both ends and low in the middle, especially for large-size (such as Φ266.7) carrier catalysts, the extreme difference of slurry coating height is >12mm. The resulting uneven slurry coating leads to unqualified catalyst performance and substandard emissions, which brings many hidden dangers to product quality and regulatory compliance. Utility Model Content

[0005] The technical problem to be solved by the utility model is to eliminate the problem of uneven carrier coating resulting from the continuous pulsation generated when the pipeline pump transports the slurry and the slurry vortex caused by the slurry loading component structure of the coating device, which fails to meet the National VI catalyst emission regulations, while keeping the main structure of the coating device and the slurry process conditions unchanged.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A device for eliminating slurry pulsation and vortex in automobile carrier catalyst coating includes a slurry pulsation eliminating component and a slurry vortex eliminating component. The slurry pulsation eliminating component is located inside a slurry loading component of the automobile carrier catalyst coating; the slurry vortex eliminating component is located inside a slurry loading component of the coating device and is fixed above the slurry pulsation eliminating component through a positioning groove.

[0008] The slurry pulsation elimination component is placed on the support platform of the slurry loading component, and its plane is flush with the plane of the slurry loading component. The slurry vortex elimination component is placed above the slurry pulsation elimination component and is fixed by the positioning support platform.

[0009] The slurry vortex elimination component is composed of nine parts, in which a ring is in the center, and one end of four cylinders is 90 degrees away from the outside of the ring. 0 The four triangular pieces are welded horizontally to form a cross shape with the ring as the center, and one side of the four triangular pieces is welded parallel to the four stainless steel cylinders, and five equally spaced circular holes are vertically penetrated on the surface of the triangular piece. The circular holes on the surface of the triangular piece are used to realize the fluctuation of the slurry liquid level during the vortex elimination process.

[0010] The slurry pulsation eliminating component has the shape of an inverted cone that is wide at the top and narrow at the bottom. A circular hole is penetrated from top to bottom with the axis of the cone as the standard. A positioning pedestal is processed on the upper part of the through circular hole to form a support with the slurry eliminating component. An outer circular end face is processed inwardly from the outer side of the upper part of the cone to form a support with the pedestal. An arc pressure relief groove with a certain curvature is processed inwardly from the outer side of the lower part of the cone. The arc pressure relief groove is used to collide with the slurry entering the coating device to eliminate the pulsation generated by the pipeline pump.

[0011] The working principle of the slurry pulsation eliminating component of the utility model is that the coating slurry enters from the slurry feed port through the pipeline pump and the pipeline, and the pulsating slurry generated by the pipeline pump completes the pulsation elimination in the collision with the circular arc pressure reducing groove.

[0012] The working principle of the slurry vortex elimination component of the utility model is as follows: after the slurry is impacted by the circular arc pressure relief groove to eliminate the pulsation, a weak vortex is formed between the circular arc pressure relief groove and the inner wall of the slurry loading component in contact with the slurry, and then enters the interior of the coating device, and the vortex is eliminated under the blocking action of the triangular sheet, and the drainage of the through hole prevents the fluctuation of the slurry liquid level caused by the vortex barrier.

[0013] The beneficial effects of the utility model include:

[0014] The utility model has the advantages of simple structure, convenient maintenance, and does not change the main structure of the coating device or the slurry properties. It is an ideal coating device component for eliminating the problem of uneven coating caused by slurry pulsation and slurry vortex during coating of silicon carbide / cordierite honeycomb carriers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a carrier, a coating device and the device of the utility model;

[0017] Figure 2 1 is a view of the slurry vortex elimination component of the utility model device, wherein: (a) is a front view, (b) is a top view, and (c) is an axonometric view;

[0018] Figure 3 1 is a view of the slurry pulsation elimination component of the utility model device, wherein: (a) is a front view, (b) is a cross-sectional view, (c) is a top view, and (d) is an axonometric view;

[0019] Figure 4 It is an assembly view of the slurry pulsation elimination component of the device of the utility model and the slurry loading component of the coating device, wherein: (a) is a front view, (b) is a cross-sectional view, (c) is a top view, and (d) is an axonometric view;

[0020] The reference numerals in the figure are:

[0021] 1-Carrier, 2-Car carrier catalyst coating, 3-Slurry pulsation and slurry vortex elimination device;

[0022] 21-carrier fixing component, 22-slurry loading component, 23-slurry feeding port, 24-connecting bolt, 25-connecting bolt through hole, 26-cap;

[0023] 31-slurry vortex elimination component, 311-circular ring, 312-cylinder, 313-triangular piece, 314-through hole; 32-slurry pulsation elimination component, 321-outer circular end surface, 322-arc pressure relief groove;

[0024] 33-Positioning the abutment. DETAILED DESCRIPTION

[0025] The implementation of the utility model is now described in detail with reference to the accompanying drawings.

[0026] like Figure 1 , Figure 4 As shown, the device of the utility model is located inside the automobile carrier catalyst coating 2, wherein the slurry pulsation elimination component 32 is placed on the slurry loading component 22 support platform 26, and its plane is flush with the plane of the slurry loading component 22. The slurry vortex elimination component 31 is placed above the slurry pulsation elimination component 32 and fixed by the positioning support platform 33.

[0027] Specifically, Figure 2As shown, the slurry vortex eliminating component 31 is composed of 9 parts, among which the circular ring 311 is in the center, one end of the four cylinders 312 is horizontally welded to the outside of the circular ring 311 at an interval of 90°, forming a cross shape with the circular ring 311 as the center, one side of the four triangular pieces 313 is welded in parallel under the four cylinders 312, and five equally spaced circular holes 314 are vertically penetrated on the surface of the triangular piece 313.

[0028] Preferably, the diameter of the circular hole 314 is Φ6 mm.

[0029] Preferably, the triangular piece 313 is an unequal-sided right-angled triangular piece, and its long right-angled sides are respectively welded and connected in parallel below the four cylinders 312 .

[0030] Preferably, the circular ring 311 and the triangular piece 313 are made of stainless steel.

[0031] like Figure 3 As shown, the slurry pulsation elimination component 32 is made of HBPE material in one piece, and its shape is an inverted cone that is wide at the top and narrow at the bottom. The specific details include: a circular hole is drilled from top to bottom based on the axis of the cone, a positioning support 33 is machined on the upper part of the through circular hole to form a support with the slurry elimination component 31, an outer circular end surface 321 is machined inwardly from the outer side of the upper part of the cone to form a support with the support 26, and a circular arc decompression groove 322 with a certain curvature is machined inwardly from the outer side of the lower part of the cone.

[0032] Preferably, the arc decompression groove 322 has an arc angle of R40 mm.

[0033] Preferably, the density of the slurry used is 1.2-1.4 Kg / m 3 , viscosity is 1000-4000Pa.s.

Claims

1. A device for eliminating slurry pulsation and vortex in automobile carrier catalyst coating, characterized in that: The device is located inside a vehicle carrier catalyst coating device (2), and is composed of a slurry pulsation elimination component (32) and a slurry vortex elimination component (31), wherein the slurry pulsation elimination component (32) is placed on a support platform (26) of a slurry loading component (22), and its plane is flush with the plane of the slurry loading component (22); the slurry vortex elimination component (31) is placed above the slurry pulsation elimination component (32) and is fixed by a positioning support platform (33); the slurry pulsation elimination component (32) has an outer shape of an inverted cone that is wide at the top and narrow at the bottom, and a circular hole is penetrated from top to bottom based on the axis of the cone, and a positioning support platform (33) is machined on the upper part of the through-hole to form a support with the slurry vortex elimination component (31), an outer circular end surface (321) is machined inwardly on the outer side of the upper part of the cone to form a support with the support platform (26), and a circular arc pressure relief groove (322) with a certain curvature is machined inwardly on the outer side of the lower part of the cone; The slurry vortex eliminating component (31) is composed of a circular ring (311), four circular cylinders (312), a triangular sheet (313) arranged below each circular cylinder (312), and a plurality of circular holes (314) arranged on each triangular sheet (313); wherein: the circular ring (311) is centered, the four circular cylinders (312) form a cross shape with the circular ring (311) as the center, one end of each circular cylinder (312) is horizontally welded to the outside of the circular ring (311) at an interval of 90 degrees; one side of the four triangular sheets is respectively welded in parallel below the four circular cylinders (312), and a plurality of circular holes (314) are vertically penetrated through the surface of the triangular sheet (313).

2. The device according to claim 1, characterized in that The triangular sheet (313) is provided with five circular holes (314) distributed at equal intervals.

3. The device according to claim 1, characterized in that The diameter of the circular hole (314) is Φ6 mm.

4. The device according to claim 1, characterized in that The triangular piece (313) is an unequal-sided right-angled triangular piece, and its long right-angled sides are respectively welded and connected in parallel below the four cylinders (312).

5. The device according to claim 1, characterized in that The arc of the circular arc pressure relief groove (322) is R40mm.

6. The device according to claim 1, characterized in that The circular ring (311) and the triangular piece (313) are made of stainless steel.

7. The device according to claim 1, characterized in that The slurry pulsation eliminating component (32) is made of HBPE material in one piece.

8. The device according to any one of claims 1 to 7, characterized in that: The density of the slurry is 1.2-1.4Kg / m 3 , viscosity is 1000-4000Pa.s.

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