On-line continuous regeneration device for catalyst of SCR (selective catalytic reduction) system

Abstract

The utility model relates to the field of regeneration devices, in particular to an on-line continuous catalyst regeneration device of an SCR (Selective Catalytic Reduction) system, which is characterized in that the input end of an SCR processor is respectively connected with a gas inlet pipe and a mixing pipe, and the gas inlet pipe and the mixing pipe are communicated with each other and are connected with a waste gas input end. According to the utility model, through the design of a double-pipeline structure, waste gas is introduced into the mixing pipe in the regeneration process of a catalyst, the spiral shearing and collision mixing effects of the waste gas and reaction liquid are realized by combining a spraying system and a double-cone-cylinder spiral mechanism, and a multiple shearing mechanism is realized by the spiral channels which are matched with each other and are formed in the inner walls of the spiral blades and the cavity; tooth-shaped grooves and through holes are formed in the spiral blades, so that the tearing and dispersing effects on liquid drops are further improved, the mixing effect of waste gas and reaction liquid is effectively improved, the regeneration efficiency of reaction mixed gas and a catalyst is ensured, and the operation efficiency of equipment is ensured.

Description

Technical Field

[0001] This utility model relates to the field of regeneration equipment technology, and in particular to an online continuous regeneration device for SCR system catalysts. Background Technology

[0002] Selective catalytic reduction (SCR) technology achieves efficient conversion of nitrogen oxides through chemical catalytic reactions. Its core principle involves precisely injecting a reducing agent into the exhaust gas under the action of a catalyst, where it selectively reacts with NOx to produce harmless nitrogen and water. This technology can reduce NOx emissions by 80%-95%, and is particularly suitable for diesel engines and industrial coal-fired applications.

[0003] The denitrification performance largely depends on the activity of the SCR catalyst. When the catalyst activity decreases, the unit cannot be guaranteed to operate at the designed denitrification efficiency. Traditional technology requires injecting the reducing agent into the exhaust gas pipeline through an additional pipeline. During the pipeline transportation process, the exhaust gas and the reducing agent are mixed. The mixed gas will flow through the catalyst for reaction and regeneration. However, in this process, traditional devices cannot achieve efficient mixing of the reducing agent and the exhaust gas, which affects the continuous regeneration effect of the final catalyst component and is not conducive to the overall operating efficiency of the unit. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an online continuous regeneration device for SCR system catalysts.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] The SCR system catalyst online continuous regeneration device includes an SCR processor. The input end of the SCR processor is connected to the inlet pipe and the mixing pipe, respectively. The inlet pipe and the mixing pipe are interconnected and connected to the exhaust gas input end.

[0007] Multiple atomizing nozzles are installed on one side of the middle section of the mixing tube, and multiple grids are installed on the side away from the atomizing nozzles. A conical mixing chamber is opened on the side away from the grids. A double cone is rotatably installed at the center of the conical mixing chamber. The double cone is driven to rotate by a drive motor. The outer wall of the double cone is provided with helical blades, which fit into the helical grooves opened on the inner wall of the conical mixing chamber.

[0008] The outer edge of the helical blade is provided with multiple toothed grooves, and there is a gap between the helical blade and the helical grooves.

[0009] In addition, a preferred configuration is that both the intake pipe and the mixing pipe have electric valves installed at their inlets.

[0010] In addition, a preferred structure is that a spray frame is installed on the outside of the mixing pipe, the input end of the spray frame is connected to an external water source, and the output end of the spray frame is connected to an atomizing nozzle.

[0011] Furthermore, in a preferred configuration, the side of the conical mixing chamber facing the medium input port is pointed.

[0012] In addition, a preferred structure is that a drive motor is installed on the outer side of the mixing tube, the output shaft of the drive motor passes into the interior of the mixing tube and is driven and connected to the double cone cylinder, the other end of the double cone cylinder is rotatably connected to the support frame, and the support frame is installed on the inner side of the mixing tube.

[0013] In addition, a preferred structure is that the spiral groove and the spiral blade are provided with multiple through holes.

[0014] The beneficial effects of this utility model are as follows:

[0015] In this invention, through the design of a dual-pipeline structure, waste gas is introduced into the mixing pipe during the catalyst regeneration process. Combined with the spray system and the double-cone spiral mechanism, the waste gas and the reaction liquid achieve a spiral shearing and collision mixing effect. The spiral blades and the inner wall of the cavity are provided with matching spiral channels to realize a multiple shearing mechanism. Furthermore, the spiral blades are provided with toothed grooves and through holes to further improve the tearing and dispersion effect on the droplets, effectively improving the mixing effect of waste gas and reaction liquid, ensuring the regeneration efficiency of the reaction mixture and catalyst, and guaranteeing the operating efficiency of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the online continuous regeneration device for the SCR system catalyst proposed in this utility model;

[0017] Figure 2 Schematic diagram of the internal structure of the hybrid tube proposed in this utility model Figure 1 ;

[0018] Figure 3 Schematic diagram of the internal structure of the hybrid tube proposed in this utility model Figure 2 ;

[0019] Figure 4 This is a schematic diagram of the spiral blade structure proposed in this utility model;

[0020] Figure 5 This is a schematic diagram of the through hole location structure proposed in this utility model.

[0021] In the diagram: 1 SCR processor, 2 intake pipe, 21 mixing pipe, 3 drive motor, 4 spray frame, 41 nozzle, 5 electric valve, 6 grid, 8 support frame, 9 double cone, 91 spiral blade, 10 conical mixing chamber, 11 spiral groove, 12 toothed groove, 13 through hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-5 The SCR system catalyst online continuous regeneration device includes an SCR processor 1. The input end of the SCR processor 1 is connected to the inlet pipe 2 and the mixing pipe 21 respectively. The inlet pipe 2 and the mixing pipe 21 are interconnected and connected to the exhaust gas input end.

[0024] The SCR processor 1 is equipped with a catalyst assembly.

[0025] Multiple atomizing nozzles 41 are installed on one side of the middle section of the mixing tube 21, and multiple grids 6 are installed on the side away from the atomizing nozzles 41. A conical mixing chamber 10 is opened on the side away from the grids 6. A double cone 9 is rotatably installed at the center of the conical mixing chamber 10. The outer wall of the double cone 9 is provided with a spiral blade 91, and the spiral blade 91 matches the spiral groove 11 opened on the inner wall of the conical mixing chamber 10.

[0026] The outer edge of the spiral blade 91 is provided with a plurality of toothed grooves 12, and there is a gap between the spiral blade 91 and the spiral grooves 11.

[0027] Electric valves 5 are installed at the inlets of both the intake pipe 2 and the mixing pipe 21. The airflow inside the intake pipe 2 or the mixing pipe 21 can be controlled separately by controlling the electric valves 5.

[0028] Electric valve 5 is a standard configuration in this field and can be purchased and used directly from the market, so it will not be explained further.

[0029] A spray frame 4 is installed on the outside of the mixing pipe 21. The input end of the spray frame 4 is connected to an external water source, i.e., a reducing agent.

[0030] The output end of the spray frame 4 is connected to the atomizing nozzle 41, through which the reducing agent is sprayed.

[0031] The conical mixing chamber 10 has a pointed end facing the medium inlet and a wide opening at the other end.

[0032] A drive motor 3 is installed on the outer side of the mixing tube 21. The output shaft of the drive motor 3 passes through the interior of the mixing tube 21 and is driven by the double cone 9. The other end of the double cone 9 is rotatably connected to the support frame 8, which is installed on the inner side of the mixing tube 21.

[0033] Multiple through holes 13 are provided on the spiral groove 11 and the spiral blade 91.

[0034] In this embodiment, during the maintenance and regeneration of the catalyst, the inlet pipe 2 is closed and the mixing pipe 21 is opened, allowing the exhaust gas to enter the mixing pipe 21.

[0035] At the same time, the external pump pumps the reducing agent through the spray frame 4 to the atomizing nozzle 41, and the atomizing nozzle 41 atomizes and sprays the reducing agent out, mixing it with the passing exhaust gas.

[0036] Then, the drive motor 3 drives the double cone 9 in the mixing tube 21 to rotate. As the waste gas mixed with the reducing agent enters the conical mixing chamber 10, the conical structure can disrupt the gas flow to generate turbulence and guide the flow in the gradually expanding spiral groove 11. As the double cone 9 with spiral blades 91 rotates, the airflow is forced to flow in a spiral. In this process, the mixed gas achieves efficient mixing between gas and liquid through rotational cutting and spiral collision. Then, the waste gas with fully mixed reducing agent will enter the SCR processor 1 through the mixing tube 21 and react with the catalyst configured in the SCR processor 1.

[0037] In practical applications, the toothed grooves 12 on the spiral blades 91 can effectively cut the liquid, increasing the shearing and atomization effect on the reducing agent.

[0038] In practical applications, the mixed exhaust gas can be rapidly divided and its airflow disrupted when passing through the through-hole 13, achieving a highly efficient mixing reaction.

[0039] The spray frame 4 is connected to the atomizing nozzle 41 by a pipeline.

[0040] The grille mesh 6 comes into contact with the exhaust gas to achieve collision mixing.

[0041] In practical applications, the electric valve 5 at one point of the mixing pipe 21 is closed, the air inlet pipe 2 is open, and the exhaust gas enters the SCR processor normally through the air inlet pipe 2 for reaction.

[0042] It should be noted that the internal structure of the SCR processor 1 not explained in detail above is common knowledge to those skilled in the art, and the catalyst assembly is a necessary and conventional configuration of the SCR processor 1, and will not be explained further.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An online continuous regeneration device for SCR system catalyst, comprising an SCR processor (1), characterized in that, The input terminal of the SCR processor (1) is connected to the intake pipe (2) and the mixing pipe (21) respectively. The intake pipe (2) and the mixing pipe (21) are interconnected and connected to the exhaust gas input terminal. Multiple atomizing nozzles (41) are installed on one side of the middle part of the mixing tube (21), and multiple grids (6) are installed on the side away from the atomizing nozzles (41). A conical mixing chamber (10) is opened on the side away from the grids (6). A double cone (9) is rotatably installed at the center of the conical mixing chamber (10). The double cone (9) is driven to rotate by a drive motor (3). The outer wall of the double cone (9) is provided with a spiral blade (91). The spiral blade (91) matches the spiral groove (11) opened on the inner wall of the conical mixing chamber (10). The outer edge of the spiral blade (91) is provided with a plurality of toothed grooves (12), and there is a gap between the spiral blade (91) and the spiral grooves (11).

2. The online continuous regeneration device for the SCR system catalyst according to claim 1, characterized in that, Electric valves (5) are installed at the inlets of the air intake pipe (2) and the mixing pipe (21).

3. The online continuous regeneration device for the SCR system catalyst according to claim 1, characterized in that, The mixing pipe (21) is equipped with a spray frame (4) on the outside. The input end of the spray frame (4) is connected to an external water source, and the output end of the spray frame (4) is connected to the atomizing nozzle (41).

4. The online continuous regeneration device for the SCR system catalyst according to claim 1, characterized in that, The cone-shaped mixing chamber (10) has a pointed end on the side facing the medium input port.

5. The online continuous regeneration device for the SCR system catalyst according to claim 1, characterized in that, A drive motor (3) is installed on the outer side of the mixing tube (21). The output shaft of the drive motor (3) passes into the interior of the mixing tube (21) and is driven and connected to the double cone (9). The other end of the double cone (9) is rotatably connected to the support frame (8). The support frame (8) is installed on the inner side of the mixing tube (21).

6. The online continuous regeneration device for the SCR system catalyst according to claim 1, characterized in that, The spiral groove (11) and spiral blade (91) are provided with multiple through holes (13).

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