Special ash removal device for SCR (Selective Catalytic Reduction) denitration reactor of biomass-fired boiler

Abstract

The utility model belongs to the technical field of SCR (Selective Catalytic Reduction) denitration, and particularly relates to an ash removal device special for an SCR denitration reactor of a biomass burning boiler, which comprises a reactor shell and an ash removal component arranged above the inner wall of the reactor shell, the ash removal assembly comprises an air bag, a mounting frame is fixedly mounted at the front end of the reactor shell, the air bag is mounted on the mounting frame, and the output end of the air bag is connected with a pulse electromagnetic valve. The air bag is used for storing compressed air, the pulse electromagnetic valve is used for controlling the blowing time, and a pulse blowing pipe distributes blowing airflow; one pulse injection pipe is provided with a plurality of air outlets, and compressed air flow is injected downwards from the air outlets to form a pulse air flow for injection cleaning; the air cylinder is controlled to push the U-shaped frame to drive the rectangular rotating shaft to rotate through the connecting rod mechanism, the rectangular rotating shaft drives the pulse blowing pipe to rotate, and therefore the air outlet is driven to adjust the angle, and the blowing cleaning angle is enlarged.

Description

Technical Field

[0001] The utility model relates to the technical field of SCR denitration, in particular to a ash cleaning device specially used for an SCR denitration reactor of a biomass-fired boiler. Background Art

[0002] Boiler combustion will produce nitrogen oxides. The process of removing nitrogen oxides is called denitrification. SCR denitrification is one of the denitrification methods. SCR denitrification requires the use of a catalyst, and the catalyst needs to be cleaned regularly during use.

[0003] The fuels burned in boilers mainly include coal, biomass, natural gas, etc.

[0004] At present, the main cleaning methods for SCR denitrification catalysts are rake soot blowing and sonic soot blowing;

[0005] Rake-type soot blowing relies on compressed air flow to clean the catalyst, which is characterized by incomplete cleaning, huge gas consumption, and slightly larger floor space.

[0006] Sonic catalyst soot blowing relies on high-frequency vibrating sound waves to clean the catalyst, and its characteristic is poor cleaning effect.

[0007] The ash produced by boilers burning biomass fuel contains tar, which is more sticky than other fuels and is more difficult to clean. The current cleaning methods cannot clean the ash produced by burning biomass fuel.

[0008] To this end, we invented a ash cleaning device specifically for the SCR denitrification reactor of a biomass-fired boiler. Utility Model Content

[0009] In view of the above-mentioned and / or existing problems in a ash cleaning device specially used for an SCR denitration reactor of a biomass-fired boiler, the present utility model is proposed.

[0010] Therefore, the purpose of the utility model is to provide a ash cleaning device specifically used for the SCR denitrification reactor of a biomass-fired boiler, which can solve the above-mentioned existing problems.

[0011] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0012] A ash cleaning device specially used for a biomass-fired boiler SCR denitration reactor, comprising: a reactor shell, and also comprising an ash cleaning component installed above the inner wall of the reactor shell;

[0013] The dust cleaning component comprises:

[0014] An air bag, a mounting frame is fixedly installed at the front end of the reactor shell, the air bag is installed on the mounting frame, the output end of the air bag is connected to a pulse solenoid valve, the output end of the pulse solenoid valve is connected to a pulse blowing pipe, and the bottom end of the pulse blowing pipe is provided with an air outlet.

[0015] As a preferred solution of a cleaning device specifically used for an SCR denitrification reactor of a biomass-fired boiler described in the utility model, a sealed rotary joint is installed between the output end of the pulse solenoid valve and the input end of the pulse injection pipe, so that the pulse solenoid valve and the pulse injection pipe are rotatably connected.

[0016] As a preferred solution of the cleaning device specially used for the SCR denitrification reactor of a biomass-fired boiler described in the utility model, a rectangular rotating shaft is installed at one end of the pulse injection pipe away from the sealed rotary joint, and an adjustment component is connected to the other end of the rectangular rotating shaft away from the pulse injection pipe.

[0017] As a preferred solution of a cleaning device specifically used for an SCR denitrification reactor of a biomass-fired boiler described in the utility model, the adjusting component includes a connecting rod mechanism, and the connecting rod mechanism includes a support plate, a rectangular slot is provided at the bottom end of the support plate, and the inner wall of the rectangular slot is slidably connected to the outer wall of the rectangular rotating shaft.

[0018] As a preferred solution of a cleaning device specially used for an SCR denitrification reactor of a biomass-fired boiler described in the utility model, wherein: a top end of one of the multiple support plates is fixedly connected to a top block, a connecting rod is provided between adjacent support plates, and both ends of the connecting rod are rotatably connected to one of the two adjacent support plates.

[0019] As a preferred solution of the ash cleaning device specially used for the SCR denitration reactor of a biomass-fired boiler described in the utility model, the regulating component also includes a cylinder, and the output end of the cylinder is fixedly connected to a U-shaped frame.

[0020] As a preferred solution of a cleaning device specifically used for an SCR denitrification reactor of a biomass-fired boiler described in the utility model, the inner wall of the U-shaped frame is rotatably connected to the outer wall of the top block, and the end of the cylinder away from the U-shaped frame is rotatably connected to the rear end of the reaction chamber shell.

[0021] As a preferred solution of the cleaning device specially used for the SCR denitrification reactor of a biomass-fired boiler described in the utility model, a bearing is provided between the rectangular rotating shaft and the end of the pulse blowing pipe away from the sealed rotating joint, so that the rectangular rotating shaft is rotatably connected with the pulse blowing pipe.

[0022] Compared with existing technologies:

[0023] The function of the air bag is to store compressed air, the function of the pulse solenoid valve is to control the duration of the spraying, the pulse spray tube distributes the spraying airflow, and a pulse spray tube is equipped with multiple air outlets. The compressed air flow is sprayed downward from the air outlet to form a pulse airflow for spraying and cleaning; the control cylinder pushes the U-shaped frame to drive the rectangular shaft to rotate through the connecting rod mechanism, and the rectangular shaft drives the pulse spray tube to rotate, thereby driving the air outlet to adjust the angle and expand the spraying and cleaning angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the front view of the utility model;

[0025] Figure 2 For this utility model Figure 1 Rear view of

[0026] Figure 3 For this utility model Figure 2 The interior view of

[0027] Figure 4 This is the front view of the air bag of the utility model;

[0028] Figure 5 This is the front view of the pulse jet tube of the utility model;

[0029] Figure 6 This is a schematic diagram of the three-angle spraying of the pulse spray tube of the utility model.

[0030] In the figure: reactor shell 1, air bag 2, pulse solenoid valve 3, sealed rotary joint 4, pulse blowing tube 5, bearing 6, rectangular rotating shaft 7, cylinder 8, U-shaped frame 801, connecting rod mechanism, support plate 901, connecting rod 902, rectangular slot 903, top block 904. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] Embodiment 1:

[0033] The utility model provides a ash cleaning device specially used for the SCR denitrification reactor of a biomass-fired boiler, which has the advantages of being easy to use and improving efficiency. Figure 1-5 , including a reactor shell 1, and also including a dust cleaning component installed above the inner wall of the reactor shell 1;

[0034] The dust cleaning component includes: an air bag 2, a mounting frame is fixedly installed at the front end of the reactor shell 1, the air bag 2 is installed on the mounting frame, the output end of the air bag 2 is connected to a pulse solenoid valve 3, the output end of the pulse solenoid valve 3 is connected to a pulse blowing pipe 5, and the bottom end of the pulse blowing pipe 5 is provided with an air outlet 501.

[0035] During specific use, technicians in this field regard the air bag 2 as storing compressed air, the pulse solenoid valve 3 as controlling the duration of the spray (usually instantaneous spray, opening and closing once is less than 0.5S), and the pulse spray pipe 5 distributes the spray airflow. A pulse spray pipe 5 is equipped with multiple air outlets 501. The compressed air flow is sprayed downward from the air outlet 501 to form a pulse airflow for spraying and cleaning.

[0036] Embodiment 2:

[0037] The utility model provides a ash cleaning device specially used for the SCR denitrification reactor of a biomass-fired boiler. Figure 1-5 A sealed rotary joint 4 is installed between the output end of the pulse solenoid valve 3 and the input end of the pulse blowing tube 5, so that the pulse solenoid valve 3 and the pulse blowing tube 5 are rotationally connected.

[0038] A rectangular rotating shaft 7 is installed at one end of the pulse blowing tube 5 away from the sealing rotary joint 4 , and an adjusting component is connected to one end of the rectangular rotating shaft 7 away from the pulse blowing tube 5 .

[0039] The adjustment assembly includes a connecting rod mechanism, which includes a support plate 901 . A rectangular slot 903 is formed at the bottom end of the support plate 901 . The inner wall of the rectangular slot 903 is slidably connected to the outer wall of the rectangular rotating shaft 7 .

[0040] A top block 904 is fixedly connected to the top of one of the plurality of support plates 901 , and a connecting rod 902 is disposed between adjacent support plates 901 . Both ends of the connecting rod 902 are rotatably connected to one of two adjacent support plates 901 .

[0041] The regulating component also includes: a cylinder 8, and an output end of the cylinder 8 is fixedly connected to a U-shaped frame 801.

[0042] The inner wall of the U-shaped frame 802 is rotatably connected to the outer wall of the top block 904 , and one end of the cylinder 8 away from the U-shaped frame 801 is rotatably connected to the rear end of the reaction chamber shell 1 .

[0043] In specific use, those skilled in the art consider the air bag 2 to be used to store compressed air, the pulse solenoid valve 3 to be used to control the duration of the spray (usually instantaneous spray, with an opening and closing time of less than 0.5 seconds), the pulse spray pipe 5 to distribute the spray airflow, and one pulse spray pipe 5 is equipped with a plurality of air outlets 501, and the compressed air flow is sprayed downward from the air outlet 501 to form a pulse airflow for spray cleaning;

[0044] The control cylinder 8 pushes the U-shaped frame 801 to drive the top block 904, and the top block 904 drives the support plate 901, the support plate 901 drives the rectangular shaft 7 to rotate, and the rectangular shaft 7 drives the pulse blowing tube 5 to rotate, thereby driving the air outlet 501 to adjust the angle and expand the blowing cleaning angle.

[0045] Embodiment three:

[0046] The utility model provides a ash cleaning device specially used for the SCR denitrification reactor of a biomass-fired boiler. Figure 1-5 A bearing 6 is provided between the rectangular rotating shaft 7 and the end of the pulse blowing tube 5 away from the sealing rotary joint 4, so that the rectangular rotating shaft 7 is rotatably connected with the pulse blowing tube 5.

[0047] In specific use, those skilled in the art consider the air bag 2 to be used to store compressed air, the pulse solenoid valve 3 to be used to control the duration of the spray (usually instantaneous spray, with an opening and closing time of less than 0.5 seconds), the pulse spray pipe 5 to distribute the spray airflow, and one pulse spray pipe 5 is equipped with a plurality of air outlets 501, and the compressed air flow is sprayed downward from the air outlet 501 to form a pulse airflow for spray cleaning;

[0048] The control cylinder 8 pushes the U-shaped frame 801 to drive the top block 904, and the top block 904 drives the support plate 901, the support plate 901 drives the rectangular shaft 7 to rotate, and the rectangular shaft 7 drives the pulse blowing tube 5 to rotate, thereby driving the air outlet 501 to adjust the angle and expand the blowing cleaning angle.

[0049] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A ash cleaning device specially used for a biomass-fired boiler SCR denitrification reactor, comprising a reactor shell (1), characterized in that: It also includes a dust cleaning component installed above the inner wall of the reactor shell (1); The dust cleaning component comprises: An air bag (2), a mounting frame is fixedly mounted on the front end of the reactor shell (1), the air bag (2) is mounted on the mounting frame, the output end of the air bag (2) is connected to a pulse electromagnetic valve (3), the output end of the pulse electromagnetic valve (3) is connected to a pulse blowing pipe (5), and the bottom end of the pulse blowing pipe (5) is provided with an air outlet (501).

2. The ash cleaning device specially used for the SCR denitration reactor of a biomass-fired boiler according to claim 1 is characterized in that: A sealed rotary joint (4) is installed between the output end of the pulse electromagnetic valve (3) and the input end of the pulse blowing pipe (5), so that the pulse electromagnetic valve (3) and the pulse blowing pipe (5) are rotationally connected.

3. The ash cleaning device specially used for the SCR denitration reactor of a biomass-fired boiler according to claim 2 is characterized in that: A rectangular rotating shaft (7) is installed at one end of the pulse blowing pipe (5) away from the sealing rotary joint (4), and an adjusting component is connected to one end of the rectangular rotating shaft (7) away from the pulse blowing pipe (5).

4. The ash cleaning device specially used for the SCR denitration reactor of a biomass-fired boiler according to claim 3 is characterized in that: The adjustment assembly comprises a connecting rod mechanism, which comprises a support plate (901), a rectangular slot (903) being provided at the bottom end of the support plate (901), and an inner wall of the rectangular slot (903) being slidably connected to an outer wall of the rectangular rotating shaft (7).

5. The ash cleaning device specially used for the SCR denitration reactor of a biomass-fired boiler according to claim 4 is characterized in that: A top block (904) is fixedly connected to the top of one of the plurality of support plates (901), a connecting rod (902) is provided between adjacent support plates (901), and both ends of the connecting rod (902) are rotatably connected to one of two adjacent support plates (901).

6. The ash cleaning device specially used for the SCR denitration reactor of a biomass-fired boiler according to claim 5 is characterized in that: The regulating component further comprises: a cylinder (8), the output end of the cylinder (8) being fixedly connected to a U-shaped frame (801).

7. The ash cleaning device specially used for the SCR denitration reactor of a biomass-fired boiler according to claim 6 is characterized in that: The inner wall of the U-shaped frame (802) is rotatably connected to the outer wall of the top block (904), and the end of the cylinder (8) away from the U-shaped frame (801) is rotatably connected to the rear end of the reactor shell (1).

8. The ash cleaning device specially used for the SCR denitration reactor of a biomass-fired boiler according to claim 7 is characterized in that: A bearing (6) is provided between the rectangular rotating shaft (7) and one end of the pulse blowing tube (5) away from the sealing rotary joint (4), so that the rectangular rotating shaft (7) and the pulse blowing tube (5) are rotatably connected.

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