Diesel engine catalysis structure

Abstract

The utility model provides a diesel engine catalysis structure and belongs to the field of tail gas treatment. Comprising a shell and a catalyst installation opening, a catalytic unit is installed in the catalyst installation opening in a matched mode, and the catalytic unit comprises a supporting frame which abuts against rectangular installation openings arranged in parallel at equal intervals; the flat disc ceramic honeycomb carrier is installed in the rectangular installation opening through a handle in a drawing mode, and the height of the air inlet ends of honeycomb holes of the flat disc ceramic honeycomb carrier is larger than that of the air outlet ends of the honeycomb holes of the flat disc ceramic honeycomb carrier; the baffle is arranged between every two adjacent flat disc ceramic honeycomb carriers and fixedly connected with the supporting frame, and slag discharging holes are evenly formed in the positions, on the two sides of the porous baffle, of the bottom side of the supporting frame. According to the device, when a single flat-disc ceramic honeycomb carrier catalyst seriously falls off, the single flat-disc ceramic honeycomb carrier catalyst can be replaced independently instead of being replaced integrally, and the problems that the tail gas purification treatment effect is weakened due to the fact that the catalyst falls off from the flat-disc ceramic honeycomb carrier, and tail gas is difficult to exhaust due to the fact that the flat-disc ceramic honeycomb carrier is blocked are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a diesel engine catalytic structure. Background Art

[0002] The diesel engine catalytic structure is a diesel engine exhaust purification device that generates exhaust gas during the operation of the diesel engine. Under the action of the catalyst, the harmful gases in the exhaust gas are catalytically reduced and converted into low-pollution and non-polluting substances, thereby achieving the purpose of exhaust gas purification.

[0003] Existing diesel engine catalytic structures often use an integral ceramic honeycomb carrier to carry the catalyst. The ceramic honeycomb carrier is exposed to a high-temperature environment for a long time, and part of the catalyst will detach from the ceramic honeycomb carrier and fall into the honeycomb holes, causing a reduction in the catalyst on the inner wall of the honeycomb holes, resulting in a weakening of the exhaust gas purification effect of the ceramic honeycomb carrier. At the same time, it will also cause the ceramic honeycomb carrier to be blocked, making it difficult to discharge the exhaust gas, thereby affecting the normal operation of the diesel engine.

[0004] Patent No. CN216922277U discloses a diesel engine catalyst for a diesel vehicle, including a sandwich inner sleeve, wherein a plurality of flat disc ceramic honeycomb substrates are arranged equidistantly along the axial direction inside the sandwich inner sleeve, the honeycomb holes of the flat disc ceramic honeycomb substrates are arranged obliquely, and the height of the air inlet end of the honeycomb holes on the flat disc ceramic honeycomb substrates is greater than the height of the air outlet end, a limiting bracket is provided between two adjacent flat disc ceramic honeycomb substrates, and a fixed bracket is provided near the two ends of the sandwich inner sleeve, and the fixed bracket is supported on the side of the outermost flat disc ceramic honeycomb substrate among the plurality of flat disc ceramic honeycomb substrates.

[0005] However, during the actual use of the above-mentioned diesel engine catalyst, when the catalyst detaches from the ceramic honeycomb carrier and moves between the two flat-disc ceramic honeycomb carriers, it will gradually accumulate, thereby clogging the honeycomb holes of the bottom ceramic honeycomb carrier, causing the bottom air duct to fail to work normally, resulting in a weakened exhaust gas purification treatment effect and affecting the use of the diesel engine catalyst. Utility Model Content

[0006] In view of the above problems, the utility model provides a diesel engine catalytic structure.

[0007] A diesel engine catalytic structure includes a shell, a catalyst installation port is opened on the top side of the shell, and a catalytic unit is matched and installed in the catalyst installation port, and the catalytic unit includes: a support frame, which has a plurality of rectangular installation ports arranged in parallel with equal intervals; a plurality of flat disc ceramic honeycomb carriers, any of which is installed in the rectangular installation port by pulling out a handle, and the air inlet end height of the honeycomb hole of the flat disc ceramic honeycomb carrier is higher than the air outlet end height; a plurality of porous baffles, any of which is arranged between two adjacent flat disc ceramic honeycomb carriers and fixedly connected to the support frame, and slag discharge holes are evenly opened on the bottom side of the support frame on both sides of the porous baffles; a pull-out cabinet, which is arranged on the bottom side of the slag discharge hole and is slidably arranged on the bottom side of the shell.

[0008] In a preferred embodiment, the support frame includes: a top structural plate with multiple rectangular mounting openings; four support bars fixedly mounted on the bottom side of the top structural plate, with a rectangular cross-section; and a bottom structural plate fixedly mounted on the bottom side of the four support bars, with slag discharge holes on the bottom structural plate.

[0009] In a preferred embodiment, the bottom structural plate is embedded in the bottom side of the housing.

[0010] In a preferred embodiment, the distance between two adjacent flat ceramic honeycomb substrates is 50-100 mm.

[0011] In a preferred embodiment, the inclination angle of the honeycomb holes is 10-30°.

[0012] In a preferred embodiment, the surface of the flat ceramic honeycomb substrate is coated with a three-way catalyst layer.

[0013] In a preferred embodiment, a slag discharge port is provided on the drawer cabinet for connecting to an external exhaust pipe of an induced draft fan.

[0014] 1. The diesel engine catalytic structure of the present application is designed to be assembled with a flat disc ceramic honeycomb carrier and inserted into a support frame, thereby solving the problem in the prior art that when a single flat disc ceramic honeycomb carrier catalyst falls off seriously, the flat disc ceramic honeycomb carrier can be replaced individually to avoid replacement of the entire unit. At the same time, the replacement process is simple and there is no need to remove the entire catalyst unit.

[0015] 2. The diesel engine catalytic structure of the present application solves the problem of catalyst detaching and falling from the flat disc ceramic honeycomb carrier, which weakens the exhaust gas purification effect and blocks the flat disc ceramic honeycomb carrier 20, making exhaust gas difficult to discharge, by setting inclined honeycomb holes, porous baffles, and slag discharge holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other characteristics, features and advantages of the present invention will become clear by reading the following description of exemplary embodiments with reference to the accompanying drawings. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort.

[0017] Figure 1 A cross-sectional view of the catalytic structure of a diesel engine according to the present invention;

[0018] Figure 2 A cross-sectional view of the catalytic unit of the utility model;

[0019] Figure 3 An enlarged view of the position A of the catalytic structure of the diesel engine of the utility model;

[0020] Figure 4 A magnified view of the position of the catalytic structure B of the diesel engine of the present invention;

[0021] Figure 5 The structural diagram of the catalytic unit of the utility model;

[0022] Figure 6 The structure diagram of the diesel engine catalytic structure without the cover plate installed in this utility model;

[0023] Figure 7 A top view of the catalytic structure of a diesel engine according to the present invention;

[0024] Figure 8 A front view of the catalytic structure of a diesel engine according to the present invention.

[0025] In the figure: 100, shell; 101, catalyst installation port; 102, catalytic unit; 10, support frame; 11, rectangular installation port; 20, flat disc ceramic honeycomb carrier; 21, handle; 22, honeycomb hole; 23, air inlet end; 24, air outlet end; 30, porous baffle; 12, slag discharge hole; 40, pull-out cabinet; 50, top side structural plate; 51, support bar; 52, bottom side structural plate; 41, slag discharge port. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be arbitrarily combined with each other.

[0027] The diesel engine catalytic structure is described in detail below with reference to the accompanying drawings and embodiments. Example

[0028] A diesel engine catalytic structure includes a shell 100, a catalyst installation port 101 is opened on the top side of the shell 100, and a catalytic unit 102 is matched and installed in the catalyst installation port 101. The catalytic unit 102 includes: a support frame 10, which is topped with a plurality of rectangular installation ports 11 arranged in parallel with equal intervals; a plurality of flat disc ceramic honeycomb carriers 20, any flat disc ceramic honeycomb carrier 20 is pulled out and installed in the rectangular installation port 11 by a handle 21, and the air inlet end 23 of the honeycomb hole 22 of the flat disc ceramic honeycomb carrier 20 is higher than the height of the air outlet end 24; a plurality of porous baffles 30, any porous baffle 30 is arranged between two adjacent flat disc ceramic honeycomb carriers 20 and is fixedly connected to the support frame 10, and slag discharge holes 12 are evenly opened on the bottom side of the support frame 10 on both sides of the porous baffle 30; a pull-out cabinet 40, which is arranged on the bottom side of the slag discharge hole 12 and is slidably arranged on the bottom side of the shell 100.

[0029] During operation, the flat disc ceramic honeycomb substrate 20 is pre-installed into the rectangular mounting port 11 of the catalytic unit 102, and then the entire substrate is installed into the catalyst mounting port 101. The cover is closed. When the catalyst is detached, it first falls into the honeycomb hole 22. Since the thickness of the flat disc ceramic honeycomb substrate 20 is relatively small, it is affected by the impact and vibration of the airflow and will rush out from the air inlet end 23 to the air outlet end 24. It is slightly blocked by the porous baffle 30 and will not fall directly into the honeycomb hole 22 of the adjacent flat disc ceramic honeycomb substrate 20. Finally, the fallen powder residue is discharged from the slag discharge hole 12 and falls into the pull-out cabinet 40 for collection. In addition, when the flat disc ceramic honeycomb substrate 20 is seriously damaged, the cover can be opened and the flat disc ceramic honeycomb substrate 20 can be separated from the support frame 10 by the handle 21 for replacement.

[0030] This device can effectively discharge the detached catalyst by designing the honeycomb holes 22, the porous baffle 30 and the slag discharge holes 12 at an angle. At the same time, when the catalyst of a single flat disc ceramic honeycomb carrier 20 is severely detached, it can be replaced individually instead of replacing the entire device. This solves the problem that the catalyst detaches and falls from the flat disc ceramic honeycomb carrier 20, thereby weakening the exhaust gas purification treatment effect and clogging the flat disc ceramic honeycomb carrier 20, thereby making it difficult to discharge the exhaust gas and affecting the normal operation of the diesel engine.

[0031] Among them, the support frame 10 includes: a top structural plate 50, which is provided with multiple rectangular mounting openings 11; four support bars 51, which are fixedly installed on the bottom side of the top structural plate 50 and have a rectangular cross-section; a bottom structural plate 52, which is fixedly installed on the bottom side of the four support bars 51 and has slag discharge holes 12 on the bottom structural plate 52.

[0032] The bottom structural plate 52 is embedded in the bottom side of the housing 100 .

[0033] Specifically, the catalytic unit 102 is connected to the inner wall of the housing 100 to prevent the exhaust gas from flowing around the catalytic unit 102 and to prevent the exhaust gas from not being processed by the catalyst.

[0034] The distance between two adjacent flat ceramic honeycomb carriers 20 is 50-100 mm.

[0035] The inclination angle of the honeycomb holes 22 is 10-30°.

[0036] The flat ceramic honeycomb substrate 20 is coated with a three-way catalyst layer. The three-way catalyst mainly contains precious metals such as platinum, palladium, and rhodium as reducing agents, which react chemically with harmful gases such as carbon monoxide, hydrocarbons, and nitrogen oxides in the exhaust gas to mainly produce water and carbon dioxide.

[0037] The drawer cabinet 40 is provided with a slag discharge port 41 for connecting to an exhaust pipe of an induced draft fan.

[0038] Specifically, the powder residue in the pull-out cabinet 40 is drawn out from the slag discharge port 41 through the exhaust pipe of the external induced draft fan, and there is no need to frequently handle the catalyst powder residue.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprise," or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of further limitations, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the article or device comprising the elements.

[0040] The above embodiments are intended to illustrate the technical solutions of the present invention and are not intended to limit the present invention. The present invention is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications and replacements shall be covered by the claims of the present invention.

Claims

1. A diesel engine catalytic structure, characterized in that: The invention comprises a shell (100), wherein a catalyst installation opening (101) is provided on the top side of the shell (100), a catalyst unit (102) is matched and installed in the catalyst installation opening (101), and the catalyst unit (102) comprises: A support frame (10) having a plurality of rectangular mounting openings (11) arranged in parallel and at equal intervals; A plurality of flat disc ceramic honeycomb carriers (20), any of the flat disc ceramic honeycomb carriers (20) being installed in the rectangular installation opening (11) by means of a handle (21), and the height of the air inlet end (23) of the honeycomb hole (22) of the flat disc ceramic honeycomb carrier (20) being higher than the height of the air outlet end (24); A plurality of porous baffles (30), wherein any of the porous baffles (30) is disposed between two adjacent flat disc ceramic honeycomb carriers (20) and is fixedly connected to the support frame (10), and slag discharge holes (12) are evenly provided on the bottom side of the support frame (10) on both sides of the porous baffle (30); The pull-out cabinet (40) is arranged on the bottom side of the slag discharge hole (12) and is slidably arranged on the bottom side of the shell (100).

2. The diesel engine catalytic structure according to claim 1, characterized in that: The support frame (10) comprises: The top structural plate (50) is provided with a plurality of rectangular mounting openings (11); Four support bars (51) are fixedly mounted on the bottom side of the top structural plate (50) and are arranged in a rectangular cross-section; The bottom side structural plate (52) is fixedly arranged on the bottom side of the four support bars (51), and the slag discharge hole (12) is opened on the bottom side structural plate (52).

3. The diesel engine catalytic structure according to claim 2, characterized in that: The bottom side structural plate (52) Embedded in the bottom side of the housing (100).

4. The diesel engine catalytic structure according to claim 1, characterized in that: The distance between two adjacent flat disc ceramic honeycomb carriers (20) is 50-100 mm.

5. The diesel engine catalytic structure according to claim 1, characterized in that: The inclination angle of the honeycomb holes (22) is 10-30°.

6. The diesel engine catalytic structure according to claim 1, characterized in that: The surface of the flat ceramic honeycomb carrier (20) is coated with a three-effect catalyst layer.

7. The diesel engine catalytic structure according to claim 1, characterized in that: The drawer cabinet (40) is provided with a slag discharge port (41) for connecting to an exhaust pipe of an induced draft fan.

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