SCR (Selective Catalytic Reduction) denitration catalyst cleaning device

Abstract

The utility model relates to the technical field of SCR (Selective Catalytic Reduction) denitration devices, in particular to an SCR denitration catalyst cleaning device, which comprises a denitration bin, a smoke inlet pipe, a gas inlet pipe, a gas outlet pipe, a gas inlet pipe, a gas outlet pipe, a gas inlet pipe and a gas outlet pipe, and is characterized in that a bin cover is detachably mounted at the upper end of the denitration bin; the catalytic cleaning part comprises a bearing bin mounted in the denitration bin and a stirring unit mounted in the bearing bin, and the stirring unit is used for stirring the denitration catalyst to rub and clean impurities coated on the surface of the catalyst; according to the SCR denitration catalyst cleaning device, the catalyst cleaning part is arranged in the denitration bin, so that a catalyst bearing site can be provided, meanwhile, the catalyst can be driven to move in a friction mode through the stirring unit, the traditional standing state of the catalyst can be changed, mutual friction of the catalyst is facilitated, and the problem that impurities are wrapped and accumulated is solved; and therefore, the effective denitration period is prolonged, and the catalyst replacing and cleaning frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of SCR denitrification devices, specifically to an SCR denitrification catalyst cleaning device. Background Technology

[0002] With increasingly stringent environmental regulations, SCR (Selective Catalytic Reduction) denitrification technology has become the mainstream solution for industrial flue gas treatment due to its high efficiency in treating nitrogen oxides (NOx). In the field of SCR denitrification process, SCR denitrification catalyst plays a core role. Its reaction principle lies in the selective reduction of NOx with reducing agent (ammonia water) under the action of catalyst (such as vanadium, titanium, tungsten oxide).

[0003] However, during the denitrification process, it was found that a coating layer easily forms on the catalyst surface, affecting the catalytic effect. Dust, sulfides, and other impurities in the flue gas easily cover the catalyst surface and combine with the active sites of the catalyst, leading to a decrease in catalyst activity and hindering the reaction, requiring frequent cleaning or replacement. These coating layers greatly reduce catalyst activity and denitrification efficiency, shortening the catalyst's lifespan. Currently, it is necessary to shut down the system for cleaning or replacing the catalyst, which seriously affects efficiency. Therefore, we considered designing a cleaning device that can slow down the formation of a coating layer on the catalyst surface during the denitrification process, thus extending its effective denitrification lifespan. Based on this, we propose an SCR denitrification catalyst cleaning device. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings mentioned in the background art and provide an SCR denitrification catalyst cleaning device.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A SCR denitrification catalyst cleaning device, comprising:

[0007] The denitrification chamber has a detachable cover at the top, and the cover is equipped with a flue gas inlet pipe for introducing the flue gas to be denitrified.

[0008] The catalytic cleaning unit includes a support chamber installed inside the denitrification chamber and an actuating unit installed inside the support chamber. The actuating unit is used to actuate the denitrification catalyst to rub and clean impurities coated on the catalyst surface.

[0009] Preferably, the bearing chamber has an internal cavity for holding the denitrification catalyst, and the cavity has drainage holes for draining the reaction water.

[0010] Preferably, the cavity wall is provided with an internal thread structure for threaded installation of the limiting chamber, the limiting chamber being used to limit and cover the denitrification catalyst;

[0011] The limiting chamber is provided with a through hole.

[0012] Preferably, the actuating unit includes a rotating shaft rotatably mounted at the center of the limiting chamber, and a mounting base mounted at the bottom end of the rotating shaft and located within the cavity, wherein a plurality of evenly distributed paddles are mounted on the mounting base.

[0013] Preferably, a drive motor is installed on the compartment cover, and the output shaft of the drive motor is coaxially connected to the rotating shaft.

[0014] Preferably, the cover of the chamber is equipped with an inlet pipe for spraying rinsing liquid, and the bottom of the denitrification chamber is equipped with a drain pipe for discharging the denitrification reaction water.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This SCR denitrification catalyst cleaning device provides catalyst support sites through a catalyst cleaning section located inside the denitrification chamber. At the same time, it can drive the catalyst to move by friction through a toggle unit, which can change the static state of the traditional catalyst. This helps to reduce the problem of impurity coating and accumulation by allowing the catalyst to rub against each other, thereby improving the effective denitrification cycle and reducing the frequency of catalyst replacement and cleaning. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is an exploded view of the overall structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the catalytic cleaning part of this utility model;

[0021] Figure 4 This is a schematic diagram of the toggle unit of this utility model.

[0022] The meanings of the labels in the diagram are as follows:

[0023] 1. Support base; 2. Denitrification chamber; 21. Support ring; 3. Chamber cover; 4. Smoke inlet pipe; 5. Drive motor; 6. Water inlet pipe; 7. Drain pipe;

[0024] 8. Catalytic cleaning section; 81. Support chamber; 811. Drain hole; 8101. Enclosure; 82. Limiting chamber; 821. Through hole; 83. Actuating unit; 831. Rotating shaft; 832. Mounting base; 833. Paddle. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] Please see Figure 1-4 The present invention will describe the above technical solution in detail through the following embodiments:

[0027] The SCR denitrification catalyst cleaning device in this embodiment, such as Figure 1 , Figure 2 The structure shown includes:

[0028] The denitrification chamber 2 has a detachable cover 3 installed at the top. In this embodiment, the cover 3 is equipped with a flue gas inlet pipe 4 for introducing the flue gas to be denitrified. The flue gas flowing into the flue gas inlet pipe 4 has been mixed with liquid ammonia. This part belongs to the prior art, so no further technical explanation will be given. The mixed flue gas needs to come into contact with the catalyst to achieve the denitrification reaction and produce water and gas.

[0029] like Figure 2 The structure shown has a support ring 21 installed inside the denitrification chamber 2, and a support seat 1 installed at the bottom of the denitrification chamber 2. The catalytic cleaning unit 8 includes a support chamber 81 installed at the support ring 21 inside the denitrification chamber 2. In this embodiment, the support chamber 81 has a cavity 8101 for holding denitrification catalyst particles. The mixed flue gas will contact the catalyst. If the traditional catalyst is left to stand, it is easy for impurities to continuously form a coating layer, which will affect the catalyst effect. Therefore, in this embodiment, the cavity wall of the cavity 8101 has an internal thread structure and a limiting chamber 82 is threadedly installed. Figure 2 and Figure 3 As shown in the structure, the limiting chamber 82, together with the cavity 8101, can confine the denitrification catalyst within the limiting chamber 82 and overcome the problem of traditional static catalyst placement. The actuating unit 83 is rotatably installed on the limiting chamber 82 and located within the cavity 8101.

[0030] like Figures 2-4In this embodiment, the agitator unit 83 includes a rotating shaft 831 rotatably mounted at the axis of the limiting chamber 82. A mounting base 832 is installed at the bottom of the rotating shaft 831, and four evenly distributed agitators 833 are installed on the mounting base 832. In order to achieve the effect of stirring the catalyst, the agitators 833 are tilted at a horizontal angle of 45°. When filling the catalyst, the limiting chamber 82 cannot be full, leaving space for the catalyst to be stirred. The agitator unit 83 can agitate the denitrification catalyst to generate rolling friction, which can avoid the accumulation of impurities caused by long-term standing. The stirring process can peel off surface impurities; and the nitrification reaction will produce nitrate, and the water flow will also carry away impurities.

[0031] In order to further enhance the impurity flushing effect, a water inlet pipe 6 is installed on the bin cover 3 in this embodiment. A spray head is installed inside the water inlet pipe 6 to apply flushing water. A drain pipe 7 is installed at the bottom of the denitrification bin 2 to discharge water.

[0032] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A cleaning device for SCR denitrification catalyst, characterized in that: include: The denitrification chamber (2) has a detachable cover (3) installed on its upper end. The cover (3) is equipped with a flue gas inlet pipe (4) for introducing the flue gas to be denitrified. The catalyst cleaning unit (8) includes a support chamber (81) installed in the denitrification chamber (2) and an actuating unit (83) installed in the support chamber (81). The actuating unit (83) is used to actuate the denitrification catalyst to clean the impurities coated on the catalyst surface by friction.

2. The SCR denitrification catalyst cleaning device as described in claim 1, characterized in that: The bearing chamber (81) is provided with a cavity (8101) for holding the denitrification catalyst, and the cavity (8101) is provided with a drain hole (811) for draining the reaction water.

3. The SCR denitrification catalyst cleaning device as described in claim 2, characterized in that: The cavity wall of the cavity (8101) is provided with an internal thread structure for threaded installation of the limiting chamber (82), the limiting chamber (82) is used to limit and cover the denitrification catalyst; The limiting chamber (82) is provided with a through hole (821).

4. The SCR denitrification catalyst cleaning device as described in claim 3, characterized in that: The actuating unit (83) includes a rotating shaft (831) rotatably mounted at the center of the limiting chamber (82), and a mounting base (832) mounted at the bottom end of the rotating shaft (831) and located in the cavity (8101), wherein a plurality of evenly distributed paddles (833) are mounted on the mounting base (832).

5. The SCR denitrification catalyst cleaning device as described in claim 4, characterized in that: A drive motor (5) is installed on the cover (3), and the output shaft of the drive motor (5) is coaxially connected to the rotating shaft (831).

6. The SCR denitrification catalyst cleaning device as described in claim 1, characterized in that: The cover (3) is equipped with an inlet pipe (6) for spraying rinsing liquid, and the bottom of the denitrification chamber (2) is equipped with a drain pipe (7) for discharging denitrification reaction water.

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