A dust cleaning and pre-dust removal device for SCR denitrification system

Abstract

The present invention discloses a dust cleaning and pre-dust removal device for an SCR denitration system, which relates to the technical field of waste gas treatment, and comprises a dust removal box, the inner bottom wall of which is clamped with an ash hopper slide rail, the inner top wall of which is clamped with a funnel, one side of which is clamped with a cleaning door, the top of which is clamped with a filter box, the top of which is clamped with a guide plate, one side of which is provided with a flue, and one side of which is provided with a soot blower. The dust cleaning and pre-dust removal device for an SCR denitration system, through the coordinated arrangement of the dust removal box, the ash hopper slide rail, the filter box, the guide plate and the soot blower, can make the device more convenient to clean dust during use, an ash storage bucket is arranged at the bottom of the flue, and dust settled and accumulated during operation is collected in real time, so as to avoid excessive dust accumulation that increases the load of the flue and affects the stability of flue gas circulation; the middle bracket firmly clamps the flue, resists flue gas impact, thermal expansion and contraction stress, and ensures the stability of the flue structure.

Description

Technical Field

[0001] The invention relates to the technical field of waste gas treatment, and in particular to a dust cleaning and pre-dust removal device for an SCR denitration system. Background Art

[0002] As environmental protection requirements become increasingly stringent, the reduction of nitrogen oxides in industrial waste gas has become a focus. Selective catalytic reduction (SCR) denitrification technology has been widely used in waste gas treatment in many industries such as thermal power, steel, and chemical industry due to its high denitrification efficiency. However, the stable and efficient operation of the SCR denitrification system has extremely high requirements for the purity of the incoming air. If the dust impurities carried in the flue gas are not properly handled, it will cause many difficult problems, seriously restricting the overall efficiency and service life of the system. In the traditional waste gas pretreatment link, the pre-dust removal device often has the defects of single structural design and insufficient functional integration. Most of them only rely on a simple box structure and a combination of basic filter elements. The dust cleaning and collection methods are extensive. For example, the ash hopper is installed fixedly and rigidly, and complex disassembly is required for cleaning, which consumes a lot of manpower and downtime. There is a lack of effective diversion design, and the dust-containing flue gas has a chaotic flow field in the device. , resulting in low dust separation efficiency and serious escape of fine dust, which not only pollutes subsequent equipment, but also affects the activity of the SCR system catalyst, accelerating its clogging and poisoning process. Frequent replacement of catalysts brings high costs. Moreover, the previous flue design focused on the transportation function and ignored the maintenance of operational stability. There was no effective ash storage and stable support structure. Faced with long-term high-temperature and high-speed flue gas impact, the flue is prone to deformation and displacement, resulting in air leakage and flow fluctuations, making the flue gas parameters entering the SCR system unstable, the denitrification reaction fluctuates greatly and is difficult to accurately control, affecting the final emission reduction effect. At the same time, conventional cleaning methods are mostly regular manual cleaning or simple soot blowing. The manual cleaning operation is intensive, the environment is harsh and the cleaning is not thorough. The simple soot blowing equipment is installed arbitrarily, lacks precise positioning and stable support, and cannot efficiently remove accumulated ash. Long-term accumulation causes the equipment resistance to rise and the dust removal performance to drop sharply.

[0003] However, the existing devices have the following problems:

[0004] The existing technology is not convenient for dust cleaning in actual use. The ash hopper of traditional devices is often fixedly installed and closely connected to the dust removal box to form an integrated structure. It lacks design considerations for flexible extraction and convenient replacement. As a result, during the dust cleaning stage, operators need to use complicated tools to disassemble the ash hopper and its surrounding structures. This is not only time-consuming and labor-intensive, but also greatly prolongs the equipment downtime for maintenance and interferes with the normal production process. Frequent disassembly and reinstallation can easily damage the equipment connection parts, reduce the overall sealing and structural strength, and pose hidden dangers to subsequent operation. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the shortcomings of the prior art, the present invention provides a ash cleaning and pre-dust removal device for an SCR denitrification system, which has the advantages of easy cleaning and strong stability, and solves the problem that the prior art is not convenient in dust cleaning when used in practice. The ash hopper of a traditional device is often fixedly installed and tightly connected to the dust removal box to form an integrated structure, lacking design considerations for flexible extraction and convenient replacement. As a result, during the dust cleaning stage, operators need to use complicated tools to disassemble the ash hopper and its surrounding structures, which is not only time-consuming and labor-intensive, but also greatly prolongs the equipment downtime for maintenance and interferes with the normal production process. In addition, frequent disassembly and reinstallation can easily damage the connection parts of the equipment, reduce the overall sealing and structural strength, and pose a hidden danger to subsequent operation.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a ash cleaning and pre-dust removal device for an SCR denitrification system, comprising a dust removal box, an inner bottom wall of the dust removal box is clamped with an ash hopper slide rail, an inner top wall of the dust removal box is clamped with a funnel, one side of the dust removal box is clamped with a cleaning door, the top of the dust removal box is clamped with a filter box, the top of the filter box is clamped with a guide plate, one side of the dust removal box is provided with a flue, and one side of the dust removal box is provided with a soot blower.

[0009] Preferably, a second dust removal box is provided on one side of the dust removal box, and a third dust removal box is provided on one side of the second dust removal box.

[0010] Preferably, an ash hopper is fixedly mounted on the top of the ash hopper slide rail, a handle is fixedly mounted on one side of the ash hopper, and the ash hopper slide rail is evenly clamped on the inner bottom wall of the dust removal box.

[0011] Preferably, a threaded groove is provided at the top of the funnel, an ash outlet is provided at the bottom of the funnel, and the funnel is threadedly connected to the inner side of the top wall of the dust removal box through the threaded groove.

[0012] Preferably, a lock is fixedly installed on one side of the cleaning door, a winder is fixedly installed on the top of the cleaning door, and the cleaning door is evenly clamped on one side of the dust removal box.

[0013] Preferably, an adjustment plate is clamped on the top of the filter box, an ash inlet hole is opened on one side of the filter box, bolts are fixedly installed on the four corners of the adjustment plate, and a clamping groove is opened in the middle of the adjustment plate.

[0014] Preferably, a baffle is clamped at the bottom of the guide plate, screws are clamped at both sides of the guide plate, and the guide plate is clamped with the clamping groove of the adjustment plate through the screws.

[0015] Preferably, an ash storage bucket is fixedly installed at the bottom of the flue, and a bracket is clamped at the middle of the flue.

[0016] Preferably, a stabilizing frame is fixedly installed on the bottom of the soot blower, and a soot blowing pipe is fixedly installed on one side of the soot blower.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a dust cleaning and pre-dust removal device for an SCR denitration system, which has the following beneficial effects:

[0019] The ash cleaning and pre-dust removal device for the SCR denitrification system can make the device more convenient to clean dust during use through the coordinated arrangement of the dust removal box, ash hopper slide rail, filter box, guide plate and soot blower. An ash storage bucket is arranged at the bottom of the flue to collect dust settled and accumulated during operation in real time to avoid excessive dust accumulation that increases the load on the flue and affects the stability of flue gas circulation. The middle bracket firmly clamps the flue to resist flue gas impact and thermal expansion and contraction stress, ensure the stability of the flue structure and smooth flue gas transportation, and prevent system leakage and flow fluctuation caused by flue deformation and displacement. To ensure the stability and reliability of the SCR denitrification system's air intake, the bottom of the soot blower is firmly supported by a stable frame to eliminate hidden dangers of operation vibration and displacement, and to ensure the precise positioning of the soot blowing operation. The soot blowing pipe structure on one side accurately sprays high-pressure gas at a preset angle and position, and strongly blows the dust accumulation area inside the filter box and dust removal box to promptly remove stubborn dust accumulation, maintain the cleanliness of each component, and avoid the decline in dust removal efficiency and increase in equipment resistance due to dust accumulation, thereby ensuring the continuous and stable operation of the entire cleaning and pre-dust removal device and indirectly stabilizing the working efficiency of the SCR denitrification system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a dust cleaning and pre-dust removal device for an SCR denitration system proposed by the present invention;

[0021] Figure 2 This is a schematic diagram of the funnel structure of a ash cleaning and pre-dust removal device for an SCR denitration system proposed by the present invention;

[0022] Figure 3 This is a schematic diagram of the filter box structure of a dust cleaning and pre-dust removal device for an SCR denitration system proposed by the present invention;

[0023] Figure 4 A schematic diagram of the flue structure of a ash cleaning and pre-dust removal device for an SCR denitration system proposed by the present invention;

[0024] Figure 5 This is a schematic diagram of the ash hopper slide rail structure of a ash cleaning and pre-dust removal device for an SCR denitration system proposed by the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of a soot blower of a dust cleaning and pre-dust removal device for an SCR denitration system proposed by the present invention.

[0026] In the figure: 1. dust box; 2. ash hopper slide rail; 3. funnel; 4. cleaning door; 5. filter box; 6. guide plate; 7. flue; 8. soot blower; 9. second dust box; 10. third dust box; 11. ash hopper; 12. handle; 13. threaded groove; 14. ash outlet; 15. lock; 16. reel; 17. adjustment plate; 18. ash inlet hole; 19. bolt; 20. slot; 21. baffle; 22. screw; 23. ash storage bucket; 24. bracket; 25. stabilizing frame; 26. soot blowing pipe. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-6 The inner bottom wall of the dust removal box 1 is clamped with an ash hopper slide rail 2, the inner top wall of the dust removal box 1 is clamped with a funnel 3, a second dust removal box 9 is provided on one side of the dust removal box 1, and a third dust removal box 10 is provided on one side of the second dust removal box 9. An ash hopper 11 is fixedly installed on the top of the ash hopper slide rail 2, and a handle 12 is fixedly installed on one side of the ash hopper 11. The ash hopper slide rail 2 is evenly clamped on the inner bottom wall of the dust removal box 1, a threaded groove 13 is provided on the top of the funnel 3, and an ash outlet 14 is provided at the bottom of the funnel 3. The funnel 3 is threadedly connected to the inner side of the top wall of the dust removal box 1 through the threaded groove 13. Therefore, a dust removal box 1 with suitable specifications and materials having high temperature resistance and corrosion resistance is first selected as The core bearing component builds the basic framework for the entire dust cleaning and pre-dust removal process. The ash hopper slide rail 2 is accurately clamped on the inner bottom wall of the dust removal box 1 to ensure that the ash hopper slide rail 2 is evenly distributed, and the distance between each slide rail is adapted to the bottom of the ash hopper 11, providing track support for the subsequent stable installation and smooth pulling of the ash hopper 11, ensuring the stability of the dust settling and collection path, and firmly clamping the funnel 3 on the inner top wall of the dust removal box 1. With the help of the threaded groove 13 opened on the top of the funnel 3 and the inner thread of the top wall of the dust removal box 1, the funnel 3 is firmly in place, and the bottom ash outlet 14 is accurately aligned with the lower ash hopper 11, guiding the dust to gather and fall in an orderly manner, and preventing the dust from scattering and accumulating on the inner wall of the box to cause blockage and other hidden dangers;

[0029] See also Figure 1-6The top of the filter box 5 is clamped with a guide plate 6, the top of the filter box 5 is clamped with an adjustment plate 17, one side of the filter box 5 is provided with an ash inlet hole 18, the four corners of the adjustment plate 17 are fixedly installed with bolts 19, the middle of the adjustment plate 17 is provided with a slot 20, the bottom of the guide plate 6 is clamped with a baffle 21, both sides of the guide plate 6 are clamped with screws 22, the guide plate 6 is clamped with the slot 20 of the adjustment plate 17 through the screws 22, so that the filter box 5 is firmly clamped on the top of the dust removal box 1, and the ash inlet hole 18 opened on one side of the filter box 5 is connected with the internal space of the dust removal box 1, ensuring that the dust-containing flue gas It can smoothly flow into the filter box 5 for fine filtering. The adjustment plate 17 is clamped on the top of the filter box 5. The four-corner bolts 19 of the adjustment plate 17 are used to accurately adjust its horizontal and tilt angles. The middle slot 20 of the adjustment plate 17 is tightly clamped with the two sides of the guide plate 6 through screws 22. The baffle 21 at the bottom of the guide plate 6 assists in stabilization. By reasonably adjusting the angle of the guide plate 6, the direction and speed of the flue gas flow are changed according to the flue gas flow rate and dust characteristics, and the dust-containing flue gas is guided to an ideal flow state in the filter box 5, so that the dust can be efficiently impacted on the filter medium under the synergistic effect of inertia and airflow to achieve separation;

[0030] See also Figure 1-6 , a cleaning door 4 is clamped on one side of the dust removal box 1, a flue 7 is provided on one side of the dust removal box 1, a soot blower 8 is provided on one side of the dust removal box 1, a lock buckle 15 is fixedly installed on one side of the cleaning door 4, and a reel 16 is fixedly installed on the top of the cleaning door 4. The cleaning door 4 is evenly clamped on one side of the dust removal box 1, and an ash storage bucket 23 is fixedly installed at the bottom of the flue 7. A bracket 24 is clamped on the middle part of the flue 7, and a stabilizing frame 25 is fixedly installed at the bottom of the soot blower 8. A soot blowing pipe 26 is fixedly installed on one side of the soot blower 8. Therefore, the cleaning door 4 is installed in sequence on one side of the dust removal box 1 according to the design requirements. The cleaning door 4 is evenly clamped to ensure sealing. The lock buckle 15 on one side is tightly locked in the closed state to prevent dust from escaping during operation; the top reel 16 is properly installed to facilitate the subsequent opening of the cleaning door 4 to organize and store related components such as cables, and the blower 26 is firmly installed at the corresponding position on one side of the dust removal box 1 The ash collector 8 and the bottom stabilizing frame 25 of the ash blower 8 are reliably connected with the dust box 1 to eliminate the displacement deviation caused by vibration and reaction force during the ash blowing operation, and ensure that the ash blowing pipe 26 points to the filter box 5 and the key ash accumulation area inside the dust box 1 at a preset precise angle and position to ensure the maximum cleaning effect. The flue 7 is installed on one side of the dust box 1, and the middle bracket 24 of the flue 7 tightly clamps the flue to enhance the structural strength and resist the complex working conditions such as flue gas impact, thermal expansion and contraction during operation; the bottom ash storage barrel 23 is precisely in place to receive the settled dust in the flue 7, maintain the cleanliness and smoothness of the inside of the flue 7, and ensure that the flue gas is stably transported to the dust box 1. At the same time, the second dust box 9 and the third dust box 10 are assembled on the side of the dust box 1 as needed to form a multi-stage collaborative dust removal link. The dust boxes are tightly connected and the transition is smooth. The dust is filtered in stages according to the dust particle size and concentration to improve the overall dust removal efficiency.

[0031] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0032] In summary, when the ash cleaning and pre-dust removal device for the SCR denitrification system is used, first, the dust-containing flue gas flows steadily from the flue 7, and the flue 7 is firmly supported by the bracket 24 to maintain a stable structure. During the flow of the flue gas, some large particles of dust naturally settle to the bottom ash storage bucket 23 due to gravity, which initially reduces the dust content in the flue gas. Then the flue gas steadily enters the dust removal box 1. In the dust removal box 1, the flue gas flow rate is appropriately slowed down due to the change in space, and the large particles of dust continue to settle to the bottom under the action of gravity and fall into the ash hopper 11 along the funnel 3. The ash hopper 11 is stabilized by the ash hopper slide rail 2. The collected dust can be subsequently cleaned and disposed of uniformly by pulling out the ash hopper 11 with the help of the handle 12 for convenient operation. The flue gas that has undergone preliminary dust removal flows into the filter box 5 through the ash inlet 18 at the connection between the dust removal box 1 and the filter box 5. At this time, the guide plate 6 plays an efficient role at a preset angle, changes the flow trajectory of the flue gas, and makes the fine dust entrained in the flue gas fully hit the filter medium in the filter box 5 under the driving force of inertia, so as to achieve fine separation and interception. The cleaned flue gas is discharged to the subsequent SCR denitrification system, ensuring that the flue gas entering the system is in a low-dust or even dust-free state, laying a solid foundation for the efficient development of the denitrification reaction. Maintain the stable activity of the catalyst to avoid adverse conditions such as catalyst poisoning and blockage caused by dust. Then, after running for a period of time, when dust accumulates inside the filter box 5 and the dust box 1, which may affect the dust removal efficiency and increase the equipment resistance, start the soot blower 8. The soot blower 8 relies on the stable frame 25 to run stably. The soot blowing pipe 26 sprays high-pressure gas or an appropriate cleaning medium to accurately impact the dust accumulation area, and strongly blows the filter screen of the filter box 5, the inner wall of the dust box 1 and the corners to loosen and fall off, and settle again in the ash hopper 11 or filter and clean it with the airflow for a second time. Finally, open the soot blower 8 regularly. The cleaning door 4 is unlocked by the lock 15, and the reel 16 assists in arranging the cables. The operator enters the dust removal box 1 to check the equipment, clean the stubborn dust, and maintain the components to ensure that the device is continuously in good operating conditions, and to ensure the stable pre-dust removal and cleaning service efficiency of the SCR denitrification system, and indirectly stabilize the stable and efficient operation of the entire process of the SCR denitrification system. In the multi-stage dust removal scenario, the flue gas passes through the second dust removal box 9 and the third dust removal box 10 in turn to repeat similar dust removal processes, continuously deepen the dust removal effect, and meet the stringent dust removal requirements of different working conditions before being discharged into the subsequent SCR denitrification link.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust cleaning and pre-dust removal device for an SCR denitration system, comprising a dust removal box (1), characterized in that: The inner bottom wall of the dust removal box (1) is clamped with an ash hopper slide rail (2), the inner top wall of the dust removal box (1) is clamped with a funnel (3), one side of the dust removal box (1) is clamped with a cleaning door (4), the top of the dust removal box (1) is clamped with a filter box (5), the top of the filter box (5) is clamped with a guide plate (6), one side of the dust removal box (1) is provided with a flue (7), and one side of the dust removal box (1) is provided with a soot blower (8).

2. The dust cleaning and pre-dust removal device for an SCR denitration system according to claim 1, characterized in that: A second dust removal box (9) is provided on one side of the dust removal box (1), and a third dust removal box (10) is provided on one side of the second dust removal box (9).

3. The dust cleaning and pre-dust removal device for an SCR denitration system according to claim 1, characterized in that: An ash hopper (11) is fixedly mounted on the top of the ash hopper slide rail (2), a handle (12) is fixedly mounted on one side of the ash hopper (11), and the ash hopper slide rail (2) is evenly clamped on the inner bottom wall of the dust removal box (1).

4. The dust cleaning and pre-dust removal device for an SCR denitration system according to claim 1, characterized in that: The top of the funnel (3) is provided with a threaded groove (13), the bottom of the funnel (3) is provided with an ash outlet (14), and the funnel (3) is threadably connected to the inner side of the top wall of the dust removal box (1) via the threaded groove (13).

5. The dust cleaning and pre-dust removal device for an SCR denitration system according to claim 1, characterized in that: A lock buckle (15) is fixedly installed on one side of the cleaning door (4), a reel (16) is fixedly installed on the top of the cleaning door (4), and the cleaning door (4) is evenly clamped on one side of the dust removal box (1).

6. The dust cleaning and pre-dust removal device for an SCR denitration system according to claim 1, characterized in that: An adjusting plate (17) is clamped on the top of the filter box (5), an ash inlet hole (18) is provided on one side of the filter box (5), bolts (19) are fixedly installed at the four corners of the adjusting plate (17), and a clamping groove (20) is provided in the middle of the adjusting plate (17).

7. The dust cleaning and pre-dust removal device for an SCR denitration system according to claim 6, characterized in that: A baffle (21) is clamped at the bottom of the guide plate (6), screws (22) are clamped at both sides of the guide plate (6), and the guide plate (6) is clamped with the clamping groove (20) of the adjustment plate (17) via the screws (22).

8. The dust cleaning and pre-dust removal device for an SCR denitration system according to claim 1, characterized in that: An ash storage bucket (23) is fixedly mounted at the bottom of the flue (7), and a bracket (24) is clamped in the middle of the flue (7).

9. The dust cleaning and pre-dust removal device for an SCR denitration system according to claim 1, characterized in that: A stabilizing frame (25) is fixedly mounted on the bottom of the soot blower (8), and a soot blowing pipe (26) is fixedly mounted on one side of the soot blower (8).

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