SCR (Selective Catalytic Reduction) catalyst regeneration dust removal device

Abstract

The utility model relates to an SCR (Selective Catalytic Reduction) catalyst regeneration dust removal device, which aims at solving the technical problems that the dust removal effect of an SCR catalyst module is further influenced due to the poor cleaning effect on dust adhered to the interior of a hole of the SCR catalyst module only by downwards removing dust of the SCR catalyst module through a high-pressure spray head at present, and comprises a box body, a box door is hinged to an opening in the front end of the box body through a hinge, a cleaning disc is installed in the middle of the bottom end of an inner cavity of the box body and is of a hollow structure, brushes and air outlet holes are arranged on the surface of the cleaning disc and are distributed in a staggered mode, an air blower is installed at one end of the outer side of the box body, and a fan is installed at the other end of the outer side of the box body. Dust adsorbed in honeycomb holes of an SCR catalyst body can be rubbed and cleaned through the brush, meanwhile, the air blower is started to spray airflow upwards from the air outlet holes through the air outlet pipe, and therefore blowing and dust removal are conducted on the honeycomb holes of the SCR catalyst body from bottom to top.

Description

Technical Field

[0001] This utility model relates to the field of SCR catalyst dust removal, specifically an SCR catalyst regeneration dust removal device. Background Technology

[0002] Currently, coal-fired power plants mainly use selective catalytic reduction (SCR) technology to control NOx emissions, with the SCR catalyst being the core of the entire denitrification reactor. In the SCR catalyst market, vanadium-titanium-based catalysts have become the main type of catalyst used in coal-fired power plants due to their high efficiency, stability, and suitable temperature window. However, this type of catalyst also has many shortcomings. Besides meeting the high-temperature requirements for denitrification efficiency, its biggest drawback is that the denitrification efficiency decreases significantly with increasing usage time. The lifespan of commonly used vanadium-titanium-based catalysts is generally 3-4 years; catalyst deactivation necessitates replacement, which greatly increases the operating cost of the denitrification system. Due to the high cost of replacing the catalyst, regeneration of the deactivated catalyst can be chosen to improve the economic efficiency of the denitrification system.

[0003] According to publicly available patent CN208853372U, a dust removal device for the regeneration of an SCR catalyst module is described. The key technical points include a housing, a sealed door on the housing, a support plate inside the housing, a catalyst module on the support plate, a support frame inside the housing, an air inlet duct on the support frame, a fan connected to the air inlet duct, and an air inlet located above the catalyst module. A dust exhaust duct is connected to the upper end of the housing, and a fan is installed on the dust exhaust duct. In the process of realizing this utility model, the inventors discovered that at least the following problems remain unsolved in the prior art: The dust on the SCR catalyst module is lifted by the duct, and then the dust in the air is discharged through the duct, thus completing the dust removal of the entire SCR catalyst module, improving work efficiency, and preventing dust from spreading in the air, ensuring the operator's health. However, in traditional methods, dust is only removed downwards from the SCR catalyst module using a high-pressure nozzle, which is ineffective at cleaning dust adhering to the holes of the SCR catalyst module, further affecting the dust removal effect. Therefore, a new technical solution needs to be designed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide an SCR catalyst regeneration dust removal device to solve the technical problem that the current method of simply removing dust from the SCR catalyst module by spraying it downwards with a high-pressure nozzle has a poor effect on cleaning the dust adhering to the holes of the SCR catalyst module, which further affects the dust removal effect of the SCR catalyst module.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: design an SCR catalyst regeneration dust removal device, including a box body, a box door is hinged to the front opening of the box body, a cleaning disc is installed in the middle of the bottom of the inner cavity of the box body, the cleaning disc is a hollow structure, the surface of the cleaning disc is provided with brushes and air outlet holes, the brushes and air outlet holes are distributed alternately, a blower is installed at one end of the outer side of the box body, and an air outlet pipe is connected between the air outlet end of the blower and the bottom of the cleaning disc;

[0006] A groove is provided on one side of the inner cavity of the box, and a first lead screw is rotatably connected between the two sides of the inner cavity of the groove. A slider is slidably connected in the groove, and the slider is threaded on the outside of the first lead screw. A drive motor is installed on the top of the box, and the drive end of the drive motor rotates through the box and is connected to the first lead screw. Two fixed frames are provided at one end of the slider, and the SCR catalyst body is provided between the two fixed frames.

[0007] Preferably, the slider has an adjustment groove at one end near the fixed frame, and two adjustment rods are slidably connected in the adjustment groove. The two adjustment rods are respectively connected to the two fixed frames. A bidirectional lead screw is rotatably connected between the upper and lower sides of the inner cavity of the adjustment groove, and the two adjustment rods are respectively threaded on the outer sides of the bidirectional lead screw. The top end of the bidirectional lead screw rotatably passes through the slider and is placed outside the slider. A handwheel is installed on the top of the bidirectional lead screw.

[0008] Preferably, a dust collection hood is connected to the top center of the box, a dust collection pipe is connected to the dust collection hood, and the other end of the dust collection pipe is connected to a negative pressure collection box.

[0009] Preferably, each of the two fixing frames has a slot at one end, and the depth of the slot is less than the thickness of the fixing frame.

[0010] Preferably, the inner cavity of the negative pressure collection box is equipped with a filter screen, a negative pressure pump is installed at one end of the negative pressure collection box, the suction end of the negative pressure pump is connected to the negative pressure collection box, and the connection between the suction end of the negative pressure pump and the negative pressure collection box is located below the filter screen. A cover plate is provided at the top opening of the negative pressure collection box, and a fixing bolt passes through the cover plate. The fixing bolt is threadedly connected to the surface of the negative pressure collection box.

[0011] Preferably, the box door is fitted with a transparent observation window, and the thickness of the transparent observation window is the same as the thickness of the box door.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model combines a drive motor, a sliding groove, a slider, an adjusting groove, a first lead screw, a double lead screw, a fixed frame, a blower, an air outlet pipe, a cleaning disc, an air outlet, and a brush. Driven by the drive motor, the SCR catalyst body moves up and down reciprocally. As the SCR catalyst body moves downwards, a brush inserts into the honeycomb pores of the SCR catalyst body. During the reciprocating movement of the SCR catalyst body, the brush rubs and cleans the dust adsorbed within the honeycomb pores. Simultaneously, the blower is activated, and airflow is ejected upwards from the air outlet through the air outlet pipe, thus blowing and removing dust from the honeycomb pores of the SCR catalyst body from bottom to top, thereby improving the dust removal efficiency of the SCR catalyst body.

[0014] 2. This utility model combines a negative pressure collection box, a negative pressure pump, a suction pipe, a filter screen, and a suction hood. When dust is removed from the SCR catalyst body, the negative pressure pump is activated to generate negative pressure in the negative pressure collection box. This, in conjunction with the suction pipe and suction hood, draws the dust into the filter screen of the negative pressure collection box, thus preventing the dust generated during dust removal from being stirred up inside the box and affecting the dust removal effect on the SCR catalyst body. Furthermore, the cover can be easily removed by turning the fixing bolt, making it convenient for personnel to clean the dust collected in the negative pressure collection box. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of the box body of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the box of this utility model;

[0017] Figure 3 This is a schematic diagram of the connection structure between the fixing frame and the SCR catalyst body of this utility model;

[0018] Figure 4 This is a schematic diagram of the connection structure between the cleaning disc, brush, and air outlet of this utility model.

[0019] Figure 5 This is a schematic diagram of the connection structure between the slider and the fixed frame of this utility model;

[0020] Figure 6 This is a cross-sectional front view of the negative pressure collection box of this utility model.

[0021] In the diagram: 1. Box body; 11. Box door; 12. Transparent observation window; 2. Blower; 21. Air outlet pipe; 3. Negative pressure collection box; 31. Dust hood; 32. Dust suction pipe; 33. Filter screen; 34. Negative pressure pump; 35. Cover plate; 36. Fixing bolt; 4. Drive motor; 41. First lead screw; 42. Slide groove; 5. Sliding block; 51. Fixing frame; 52. Adjustment groove; 53. Adjustment rod; 54. Two-way lead screw; 55. Handwheel; 56. Groove opening; 6. SCR catalyst body; 7. Cleaning disc; 71. Brush; 72. Air outlet. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Example 1: A dust removal device for SCR catalyst regeneration, see [link to example]. Figures 1 to 6 The system includes a housing 1, with a door 11 hinged to the front opening of the housing 1. A cleaning disc 7 is installed in the middle of the bottom of the inner cavity of the housing 1. The cleaning disc 7 has a hollow structure and is provided with brushes 71 and air outlets 72 on its surface. The brushes 71 and air outlets 72 are distributed alternately. A blower 2 (with a blower volume of 500 m³ / h) is installed at one end of the outer side of the housing 1. 3 / h to 5,000m 3 Between / h), an air outlet pipe 21 is connected between the air outlet end of the blower 2 and the bottom of the cleaning plate 7;

[0024] A groove 42 is provided on one side of the inner cavity of the housing 1. A first lead screw 41 is rotatably connected between the two sides of the inner cavity of the groove 42. A slider 5 is slidably connected in the groove 42, and the slider 5 is threaded on the outside of the first lead screw 41. A drive motor 4 is installed on the top of the housing 1. The drive end of the drive motor 4 rotatably passes through the housing 1 and is connected to the first lead screw 41. Two fixed frames 51 are provided at one end of the slider 5. An SCR catalyst body 6 is provided between the two fixed frames 51. An adjustment groove 52 is provided at the end of the slider 5 near the fixed frame 51. Two adjustment rods 53 are slidably connected in the adjustment groove 52. The two adjustment rods 53 are respectively connected to the two fixed frames 51. A bidirectional lead screw 54 is rotatably connected between the upper and lower sides of the inner cavity of the adjustment groove 52, and the two adjustment rods 53 are respectively threaded on the outer sides of the bidirectional lead screw 54. The top end of the bidirectional lead screw 54 rotatably passes through the slider 5 and is placed on the outside of the slider 5. A handwheel 55 is installed on the top of the bidirectional lead screw 54.

[0025] During operation, the distance between the two fixed frames 51 is increased by turning the double-acting screw 54 using the handwheel 55. When the distance between the two fixed frames 51 is greater than the height of the SCR catalyst body 6 that needs dust removal, the SCR catalyst body 6 is placed on the lower fixed frame 51. Then, the double-acting screw 54 is rotated in the opposite direction to clamp the SCR catalyst body 6 through the fixed frames 51 (e.g., Figure 3 As shown, after the SCR catalyst body 6 is fixed and stable, the box door 11 is closed, and the drive motor 4 is started to drive the first lead screw 41 to rotate, thereby driving the slider 5 to move up and down reciprocally, thereby driving the SCR catalyst body 6 fixed between the two fixed frames 51 to move up and down reciprocally (the up and down reciprocating movement of the SCR catalyst body 6 is achieved by the forward and reverse rotation of the drive motor 4, and the forward and reverse rotation of the drive motor 4 is a known technology, which will not be elaborated on here). When the SCR catalyst body 6 moves downward, since the area of ​​the brush 71 is larger than the end face area of ​​the SCR catalyst body 6, the brush 71 will insert into the honeycomb pores of the SCR catalyst body 6 when the SCR catalyst body 6 moves downward. Thus, during the up and down reciprocating movement of the SCR catalyst body 6, the brush 71 can rub and clean the dust adsorbed in the honeycomb pores of the SCR catalyst body 6. At the same time, the blower 2 is started to spray airflow from the air outlet 72 upward through the air outlet duct 21, thereby blowing and removing dust from the honeycomb pores of the SCR catalyst body 6 from bottom to top, thereby improving the dust removal effect of the SCR catalyst body 6.

[0026] For details, see Figure 1 and Figure 6 The top center of the housing 1 is connected to a dust collection hood 31, and a dust collection pipe 32 is connected to the dust collection hood 31. The other end of the dust collection pipe 32 is connected to a negative pressure collection box 3. A filter screen 33 is installed inside the negative pressure collection box 3, and a negative pressure pump 34 (with a suction capacity of 500m³ / h) is installed at one end of the negative pressure collection box 3. 3 / h to 5,000m 3 The suction end of the negative pressure pump 34 is connected to the negative pressure collection box 3, and the connection between the suction end of the negative pressure pump 34 and the negative pressure collection box 3 is located below the filter screen 33. A cover plate 35 is provided at the top opening of the negative pressure collection box 3, and a fixing bolt 36 passes through the cover plate 35. The fixing bolt 36 is threadedly connected to the surface of the negative pressure collection box 3. When dust removal is performed on the SCR catalyst body 6, the negative pressure pump 34 is started to generate negative pressure in the negative pressure collection box 3, thereby cooperating with the dust suction pipe 32 and the dust suction hood 31 to suck the dust collected during dust removal onto the filter screen 33 of the negative pressure collection box 3. This prevents the dust generated during dust removal from being stirred up in the box 1 and affecting the dust removal effect of the SCR catalyst body 6. Furthermore, the cover plate 35 can be easily removed by turning the fixing bolt 36, making it easier for personnel to clean the dust collected in the negative pressure collection box 3.

[0027] Further, see Figure 5 Each of the two fixing frames 51 has a slot 56 at one end. The depth of the slot 56 is less than the thickness of the fixing frame 51. By setting the slot 56, the two ends of the fixed SCR catalyst body 6 are limited, thereby improving the stability of the fixed SCR catalyst body 6.

[0028] It is worth noting that, see Figure 1 The box door 11 is inlaid with a transparent observation window 12, and the thickness of the transparent observation window 12 is the same as the thickness of the box door 11. The transparent observation window 12 facilitates the observation of the SCR catalyst body 6 inside the box 1 through the outside, thereby facilitating the observation of whether the SCR catalyst body 6 has completed the dust removal.

[0029] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0030] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. An SCR catalyst regeneration dedusting device comprising a box (1), characterized in that, The front opening of the box (1) is hinged with a door (11). A cleaning disc (7) is installed in the middle of the bottom of the inner cavity of the box (1). The cleaning disc (7) is hollow. The surface of the cleaning disc (7) is provided with a brush (71) and an air outlet (72). The brush (71) and the air outlet (72) are distributed alternately. A blower (2) is installed at one end of the outer side of the box (1). An air outlet pipe (21) is connected between the air outlet of the blower (2) and the bottom of the cleaning disc (7). A groove (42) is provided on one side of the inner cavity of the box (1). A first lead screw (41) is rotatably connected between the two sides of the inner cavity of the groove (42). A slider (5) is slidably connected in the groove (42), and the slider (5) is threaded on the outside of the first lead screw (41). A drive motor (4) is installed on the top of the box (1). The drive end of the drive motor (4) rotatably passes through the box (1) and is connected to the first lead screw (41). Two fixed frames (51) are provided at one end of the slider (5), and an SCR catalyst body (6) is provided between the two fixed frames (51).

2. The SCR catalyst regenerative dust removal apparatus according to claim 1, wherein The slider (5) has an adjustment groove (52) at one end near the fixed frame (51). Two adjustment rods (53) are slidably connected in the adjustment groove (52). The two adjustment rods (53) are respectively connected to the two fixed frames (51). A bidirectional lead screw (54) is rotatably connected between the upper and lower sides of the inner cavity of the adjustment groove (52). The two adjustment rods (53) are respectively threaded on the outer sides of the bidirectional lead screw (54). The top end of the bidirectional lead screw (54) rotatably passes through the slider (5) and is placed on the outside of the slider (5). A handwheel (55) is installed on the top of the bidirectional lead screw (54).

3. The SCR catalyst regenerative dust removal apparatus according to claim 1, wherein The top center of the box (1) is connected to a dust suction hood (31), and a dust suction pipe (32) is connected to the dust suction hood (31). The other end of the dust suction pipe (32) is connected to a negative pressure collection box (3).

4. The SCR catalyst regenerative dust removal apparatus according to claim 1, wherein Each of the two fixed frames (51) has a slot (56) at one end, and the depth of the slot (56) is less than the thickness of the fixed frame (51).

5. The SCR catalyst regenerative dust removal apparatus according to claim 3, wherein The inner cavity of the negative pressure collection box (3) is equipped with a filter screen (33). A negative pressure pump (34) is installed at one end of the negative pressure collection box (3). The suction end of the negative pressure pump (34) is connected to the negative pressure collection box (3), and the connection between the suction end of the negative pressure pump (34) and the negative pressure collection box (3) is located below the filter screen (33). A cover plate (35) is provided at the top opening of the negative pressure collection box (3), and a fixing bolt (36) passes through the cover plate (35). The fixing bolt (36) is threadedly connected to the surface of the negative pressure collection box (3).

6. The SCR catalyst regeneration dust removal device as described in claim 1, characterized in that, The box door (11) is inlaid with a transparent observation window (12), and the thickness of the transparent observation window (12) is the same as the thickness of the box door (11).

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