Exhaust aftertreatment system of hydrogen engine

Abstract

The utility model discloses a hydrogen engine exhaust aftertreatment system, and relates to the field of hydrogen engines. The exhaust aftertreatment system of the hydrogen engine comprises a hydrogen filtering and adsorbing box and a replaceable filter element. The filter element shell is arranged in the hydrogen filtering and adsorbing box; the filter element drawing box is movably inserted into the filter element shell; and the guide plate is fixedly welded in the filter element drawing box. When the exhaust aftertreatment system of the hydrogen engine is used, exhaust of the hydrogen engine enters the replaceable filter element, directional flow guide is achieved through the flow guide plate, the hydrogen passing time is prolonged, the contact area between the hydrogen and activated carbon is increased, and therefore the adsorption effect is improved; meanwhile, when the replaceable filter element is replaced, the part, which adsorbs more hydrogen, at the front end can be replaced, so that unnecessary replacement of the filter element is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen engines, in particular to an exhaust gas aftertreatment system for a hydrogen engine. Background Art

[0002] A hydrogen engine is an engine that uses hydrogen and oxygen to burn and generate heat, thereby driving the cylinder to move the piston. When in use, it uses the combustion of hydrogen and oxygen to release a large amount of heat. Under ideal conditions, the only operating product is water, without any carbon-containing substances. Therefore, it is considered a clean engine.

[0003] However, current technical means have not yet achieved stable technology for the complete reaction of hydrogen and oxygen. This means that when existing hydrogen engines are in use, some incompletely reacted hydrogen and water vapor are usually discharged to the outside. Hydrogen has certain pollutants. For this reason, the hydrogen emitted is usually treated. The mainstream practices include catalytic reaction and adsorption. The cost and conditions of catalytic reaction are too high, and the hydrogen content in the exhaust gas is very small. Therefore, the use of activated carbon adsorption is the most economical practice. When the current activated carbon adsorption device is in use, hydrogen passes through the inside of the device. Due to the linear channel design, the hydrogen residence time is insufficient. At the same time, the contact surface with the activated carbon is small, the adsorption effect is poor, the effective service life of the adsorption device is short, and there is a situation where some activated carbon fails to achieve hydrogen adsorption. For this reason, a hydrogen engine exhaust after-treatment system is specially provided to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a hydrogen engine exhaust after-treatment system, which solves the problem that hydrogen passes through the inside of the device and, due to the linear channel design, the hydrogen residence time is insufficient. At the same time, the contact surface with the activated carbon is small, the adsorption effect is poor, the effective service life of the adsorption device is short, and there is a problem that some activated carbon fails to achieve hydrogen adsorption.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: A hydrogen engine exhaust aftertreatment system, including a hydrogen filter adsorption box and a replaceable filter element arranged inside the hydrogen filter adsorption box, the number of the replaceable filter elements is multiple groups, and the multiple groups of replaceable filter elements are connected end to end, and the replaceable filter element includes;

[0006] A filter element shell, which is arranged inside the hydrogen filter adsorption box;

[0007] A filter element drawer box is movably plugged into the interior of the filter element housing, and the filter element drawer box is used to store activated carbon for adsorbing hydrogen;

[0008] The guide plate is fixedly welded to the inside of the filter element drawer box, and the guide plate is used for directional flow guidance of hydrogen.

[0009] Preferably, an air inlet nozzle is fixedly welded to one end of the hydrogen filter adsorption box, and an air exhaust nozzle is movably plugged to the other end of the hydrogen filter adsorption box.

[0010] Preferably, a connecting tube is fixedly mounted on the front end of the filter cartridge shell, and a connecting groove is opened on the rear end of the filter cartridge shell, and two adjacent groups of filter cartridge shells are connected to each other through the connecting tube and the connecting groove, and the connecting tube is movably connected inside the air inlet nozzle.

[0011] Preferably, filter screen plates are installed on the front and rear sides of the filter element drawer box, and the filter screen plates are directly opposite to the connecting pipe and the connecting groove.

[0012] Preferably, a positioning strip is provided at the inner bottom of the hydrogen filter adsorption box, a positioning groove is provided at the bottom of the filter element shell, and the positioning strip passes through the positioning groove.

[0013] Preferably, the end of the exhaust nozzle is fixedly connected with a plug, the plug is movably inserted into the interior of the connecting groove, the outer surface of the plug is fixedly sleeved with a sealing ring, and the sealing ring abuts against the outer wall of the connecting groove.

[0014] Preferably, a locking piece is provided inside the end of the hydrogen filter adsorption box, and the locking piece is used to lock the replaceable filter element and the cannula. A protective cover is provided on the top of the hydrogen filter adsorption box, and a protective pad is provided on the lower surface of the protective cover.

[0015] Preferably, the locking member comprises:

[0016] A locking frame, which is movably inserted between the inner wall of the hydrogen filter adsorption box and the replaceable filter element;

[0017] An N-shaped socket is movably plugged into the outer wall of the insert tube, and the N-shaped socket abuts against the outer side of the sealing ring;

[0018] A connecting plate, which is mounted on the locking frame and the top of the N-shaped socket;

[0019] The handle groove is arranged on the top of the connecting plate, and the protective pad abuts against the top of the connecting plate.

[0020] The utility model discloses a hydrogen engine exhaust after-treatment system, which has the following beneficial effects: by arranging a plurality of replaceable filter elements, the front and rear are plugged into each other through connecting pipes and connecting grooves, and at the same time, a filter element draw box is arranged inside the replaceable filter element, a guide plate is arranged inside the filter element draw box, and then activated carbon is filled into the filter element draw box. When in use, the exhaust gas of the hydrogen engine enters the replaceable filter element, and directional guidance is achieved through the guide plate, thereby extending the hydrogen passing time, increasing the contact area between the hydrogen and the activated carbon, and thus improving the adsorption effect. At the same time, when replacing the replaceable filter element, the part with more hydrogen adsorbed at the front end can be replaced, thereby reducing unnecessary filter element replacement and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the overall front structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the overall back structure of the utility model;

[0024] Figure 3 This is an exploded view of the top structure of the hydrogen filter adsorption box of the utility model;

[0025] Figure 4 This is a cross-sectional view of the internal structure of the hydrogen filter adsorption box of the utility model;

[0026] Figure 5 This is an exploded view of the internal structure of the replaceable filter element of the utility model.

[0027] In the figure: 1. Hydrogen filter adsorption box; 2. Protective cover; 3. Inlet nozzle; 4. Exhaust nozzle; 5. Replaceable filter element; 51. Filter element shell; 52. Positioning groove; 53. Connecting pipe; 54. Filter element drawer box; 55. Guide plate; 56. Filter screen plate; 6. Locking piece; 61. Connecting plate; 62. Locking frame; 63. N-shaped socket; 64. Handle groove; 7. Protective pad; 8. Sealing ring; 9. Insert tube; 10. Positioning strip. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The embodiment of the present application solves the problem of the existing hydrogen engine exhaust after-treatment system by providing a hydrogen engine exhaust after-treatment system. Hydrogen passes through the inside of the device. Due to the linear channel design, the hydrogen residence time is insufficient. At the same time, the contact area with the activated carbon is small, the adsorption effect is poor, the effective service life of the adsorption device is short, and there is a problem that some activated carbon fails to achieve hydrogen adsorption.

[0030] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] The utility model embodiment discloses a hydrogen engine exhaust aftertreatment system.

[0032] According to the attached Figure 1-5 As shown, it includes a hydrogen filter adsorption box 1 and a replaceable filter element 5 arranged inside the hydrogen filter adsorption box 1, the number of the replaceable filter elements 5 is multiple groups, and the multiple groups of replaceable filter elements 5 are connected end to end, and the replaceable filter elements 5 include;

[0033] A filter element shell 51 is arranged inside the hydrogen filter adsorption box 1;

[0034] The filter element drawer box 54 is movably plugged into the interior of the filter element housing 51, and the filter element drawer box 54 is used to store activated carbon for adsorbing hydrogen;

[0035] The guide plate 55 is fixedly welded to the inside of the filter element drawer box 54 and is used for directional flow guidance of hydrogen.

[0036] An air inlet nozzle 3 is fixedly welded at one end of the hydrogen filter adsorption box 1 , and an air exhaust nozzle 4 is movably plugged at the other end of the hydrogen filter adsorption box 1 .

[0037] A connecting pipe 53 is fixedly installed at the front end of the filter element shell 51, and a connecting groove is opened at the rear end of the filter element shell 51. Two adjacent groups of filter element shells 51 are connected to each other through the connecting pipe 53 and the connecting groove. The connecting pipe 53 is movably inserted into the inside of the air inlet nozzle 3.

[0038] Filter screen plates 56 are installed on the front and rear sides of the filter element drawer box 54, and the filter screen plates 56 are directly opposite to the connecting pipe 53 and the connecting groove.

[0039] A positioning strip 10 is provided at the inner bottom of the hydrogen filter adsorption box 1, and a positioning groove 52 is provided at the bottom of the filter element shell 51. The positioning strip 10 passes through the positioning groove 52, so that multiple replaceable filter elements 5 are fixed to the inner bottom of the hydrogen filter adsorption box 1. Gaps are left at the front and rear ends of the positioning strip 10, which can accommodate a group of filter element shells 51 for vertical disassembly and assembly. The multiple filter element shells 51 in the middle can be slid back and forth during the disassembly and assembly time.

[0040] The end of the exhaust nozzle 4 is fixedly connected with a plug 9, which is movably inserted into the inside of the connecting groove. The outer surface of the plug 9 is fixedly sleeved with a sealing ring 8, and the sealing ring 8 abuts against the outer wall of the connecting groove to avoid air leakage at the connection with the exhaust nozzle 4.

[0041] A locking piece 6 is provided inside the end of the hydrogen filter adsorption box 1, and the locking piece 6 is used to lock the replaceable filter element 5 and the cannula 9. A protective cover 2 is provided on the top of the hydrogen filter adsorption box 1, and a protective pad 7 is provided on the lower surface of the protective cover 2 to protect the replaceable filter element 5.

[0042] The locking member 6 comprises:

[0043] The locking frame 62 is movably inserted between the inner wall of the hydrogen filter adsorption box 1 and the replaceable filter element 5;

[0044] An N-shaped socket 63, which is movably plugged into the outer wall of the insert tube 9, and the N-shaped socket 63 abuts against the outer side of the sealing ring 8, and is used to fix the exhaust nozzle 4;

[0045] A connecting plate 61, which is mounted on the top of the locking frame 62 and the N-shaped socket 63;

[0046] A handle groove 64 is provided at the top of the connecting plate 61, and the protective pad 7 abuts against the top of the connecting plate 61;

[0047] The two sets of locking frames 62 are used to squeeze and tighten a plurality of replaceable filter elements 5 connected in sequence to avoid air leakage and facilitate quick disassembly and assembly during replacement.

[0048] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0049] The device is provided with a plurality of replaceable filter elements 5, which are mutually plugged into the connecting grooves through connecting pipes 53 at the front and rear. Meanwhile, a filter element drawer box 54 is provided inside the replaceable filter element 5, and a guide plate 55 is provided inside the filter element drawer box 54. Then, activated carbon is filled into the filter element drawer box 54. When in use, the exhaust gas of the hydrogen engine enters the replaceable filter element 5, and directional guidance is achieved through the guide plate 55, thereby extending the hydrogen passing time and increasing the contact area between the hydrogen and the activated carbon, thereby improving the adsorption effect. Meanwhile, when replacing the replaceable filter element 5, the front end portion that adsorbs more hydrogen can be replaced, thereby reducing unnecessary filter element replacement and reducing costs.

[0050] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydrogen engine exhaust aftertreatment system, comprising a hydrogen filter adsorption box (1) and a replaceable filter element (5) arranged inside the hydrogen filter adsorption box (1), characterized in that: The replaceable filter elements (5) are provided in a plurality of groups, and the plurality of groups of replaceable filter elements (5) are connected end to end. The replaceable filter elements (5) include: A filter element shell (51), which is arranged inside the hydrogen filter adsorption box (1); A filter element drawer box (54) is movably plugged into the interior of the filter element housing (51), and the filter element drawer box (54) is used to store activated carbon for adsorbing hydrogen; The guide plate (55) is fixedly welded to the inside of the filter element drawer box (54), and the guide plate (55) is used for directional flow guidance of hydrogen.

2. A hydrogen engine exhaust aftertreatment system according to claim 1, characterized in that: An air inlet nozzle (3) is fixedly welded to one end of the hydrogen filter adsorption box (1), and an air exhaust nozzle (4) is movably plugged into the other end of the hydrogen filter adsorption box (1).

3. A hydrogen engine exhaust aftertreatment system according to claim 2, characterized in that: A connecting pipe (53) is fixedly mounted on the front end of the filter cartridge housing (51), and a connecting groove is provided on the rear end of the filter cartridge housing (51). Two adjacent groups of filter cartridge housings (51) are plugged into the connecting grooves via the connecting pipe (53), and the connecting pipe (53) is movably plugged into the interior of the air inlet nozzle (3).

4. A hydrogen engine exhaust aftertreatment system according to claim 3, characterized in that: Filter screen plates (56) are installed on the front and rear sides of the filter element drawer box (54), and the filter screen plates (56) are directly opposite to the connecting pipe (53) and the connecting groove.

5. The hydrogen engine exhaust aftertreatment system according to claim 1, characterized in that: The inner bottom of the hydrogen filter adsorption box (1) is provided with a positioning strip (10), the bottom of the filter element shell (51) is provided with a positioning groove (52), and the positioning strip (10) passes through the positioning groove (52).

6. A hydrogen engine exhaust aftertreatment system according to claim 3, characterized in that: The end of the exhaust nozzle (4) is fixedly connected with a plug (9), and the plug (9) is movably inserted into the interior of the connecting groove. The outer surface of the plug (9) is fixedly sleeved with a sealing ring (8), and the sealing ring (8) abuts against the outer wall of the connecting groove.

7. A hydrogen engine exhaust aftertreatment system according to claim 6, characterized in that: A locking piece (6) is provided inside the end of the hydrogen filter adsorption box (1), and the locking piece (6) is used to lock the replaceable filter element (5) and the cannula (9). A protective cover (2) is provided on the top of the hydrogen filter adsorption box (1), and a protective pad (7) is provided on the lower surface of the protective cover (2).

8. A hydrogen engine exhaust aftertreatment system according to claim 7, characterized in that: The locking member (6) comprises: A locking frame (62) is movably inserted between the inner wall of the hydrogen filter adsorption box (1) and the replaceable filter element (5); An N-shaped socket (63) is movably plugged into the outer wall of the insert tube (9), and the N-shaped socket (63) abuts against the outer side of the sealing ring (8); A connecting plate (61) mounted on the locking frame (62) and the top of the N-shaped socket (63); The handle groove (64) is formed on the top of the connecting plate (61), and the protective pad (7) abuts against the top of the connecting plate (61).

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