Adjustable flow guide and air uniformizing device for SCR (Selective Catalytic Reduction) denitration

Abstract

The utility model discloses an adjustable flow guiding and air uniformizing device for SCR denitration, and belongs to the technical field of air pollution prevention and control. The device comprises a flow guiding and air uniformizing device, the flow guiding and air uniformizing device comprises a box body, a flow guiding plate is arranged at the corner in the box body, and a sound wave vibrator is arranged on the side face wall close to the flow guiding plate; a notch is formed in the top, close to the flow guide plate, of the box body, and clamping grooves are formed in the left side and the right side of the notch and clamped with the cleaning assembly; the cleaning assembly comprises an air storage cavity, a row of partition plates are arranged in the air storage cavity, the partition plates divide the air storage cavity into a plurality of cavities, each cavity is provided with an independent electromagnetic air inlet valve and an independent air outlet, and a filter is installed at the bottom of each electromagnetic air inlet valve. By means of the structural design of the cleaning assembly, the electromagnetic air inlet valve is used for controlling high-pressure air flow to spray and blow in different areas, accumulated dust in the flow guide plate and the box body is removed, the cleaning assembly is convenient to disassemble and assemble due to clamping groove type installation, the multiple cavities separated by the partition plates can conduct directional dust removal on different areas, and the cleaning efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of air pollution control technology, specifically an adjustable airflow distribution device for SCR denitrification. Background Technology

[0002] Selective catalytic reduction (SCR) denitrification technology is a widely used and highly efficient denitrification method in industrial flue gas treatment. Its core is to convert nitrogen oxides (NOx) into harmless nitrogen and water through the action of a catalyst. In the SCR system, the uniformity of the flue gas flow field has a significant impact on the denitrification efficiency, catalyst life, and system operation stability. If the flue gas distribution is uneven, it can easily lead to excessively high or low local flow velocities, causing problems such as catalyst wear, increased ammonia slip, or incomplete reaction, thereby reducing the overall denitrification performance.

[0003] In SCR denitrification systems, the function of the air distribution device is to ensure uniform distribution of flue gas entering the denitrification reactor, thereby ensuring thorough mixing of flue gas and reducing agent, thus improving denitrification efficiency and ensuring the stable progress of the denitrification reaction. However, in actual operation, flue gas often carries a certain amount of dust and other impurities. These impurities gradually accumulate in the air distribution device, especially in parts such as the baffle plate, which can easily cause blockage, affecting the normal flow and distribution of flue gas, thereby reducing denitrification efficiency, and may even lead to equipment failure, affecting the stable operation of the entire denitrification system. Therefore, an adjustable air distribution device for SCR denitrification is proposed to address the above situation. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable airflow distribution device for SCR denitrification.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model relates to an adjustable airflow guiding and equalizing device for SCR denitrification, comprising an airflow guiding and equalizing device, which includes a housing, a guide plate at the corner of the housing, and an acoustic vibrator on the side wall near the guide plate; a slot is opened at the top of the housing near the guide plate, and slots are opened on both the left and right sides of the slot, which engage with a cleaning component; the cleaning component includes an air storage chamber, inside which a row of partitions is arranged, dividing the air storage chamber into multiple chambers, each chamber is equipped with an independent electromagnetic air inlet valve and an air outlet, and a filter is installed at the bottom of the electromagnetic air inlet valve.

[0007] Furthermore, the acoustic vibrator is equipped with a protective shell.

[0008] Furthermore, an outlet is provided at the bottom of the box near the guide plate, and a telescopic plate is installed inside the outlet.

[0009] Furthermore, locking strips are provided on both the left and right sides of the air storage cavity, and the locking strips cooperate with the locking slots.

[0010] Furthermore, a cover is provided on the top of the air storage chamber.

[0011] Furthermore, the card strip is L-shaped.

[0012] This utility model has the following beneficial effects:

[0013] This utility model, through the structural design of the cleaning component, uses an electromagnetic air intake valve to control the high-pressure airflow in partitioned spraying to remove accumulated dust from the guide plate and the housing, avoiding the incompleteness or high energy consumption of traditional mechanical cleaning. The slot-type installation structure makes the cleaning component easy to disassemble and maintain, while the multi-chamber partition can perform targeted cleaning for different areas, improving cleaning efficiency. The sonic vibrator assists in preventing dust accumulation and reduces the frequency of manual cleaning.

[0014] This invention utilizes the structural design of an acoustic vibrator, with a guide plate at the corner of the housing combined with the acoustic vibrator, to dynamically adjust the flue gas flow direction, reduce eddies and flow deviations, and ensure uniform airflow distribution within the SCR reactor. The acoustic vibrator also prevents dust accumulation on the guide plate surface, maintaining a stable flow field distribution over a long period, avoiding catalyst wear and ammonia escape caused by excessively high or low local flow velocities, and improving denitrification efficiency.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the device;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the device;

[0018] Figure 3 This is a schematic diagram of the flow guide plate and the acoustic vibrator.

[0019] Figure 4 This is a structural diagram of the cleaning component.

[0020] In the diagram: 1. Airflow distribution device; 101. Housing; 102. Outlet; 103. Telescopic plate; 104. Slot; 105. Slot; 2. Airflow guide plate; 3. Acoustic vibrator; 301. Protective shell; 4. Cleaning assembly; 401. Air storage chamber; 402. Partition; 403. Filter; 404. Electromagnetic air intake valve; 405. Air outlet; 406. Locking strip; 407. Cover plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: an adjustable airflow distribution device for SCR denitrification, including an airflow distribution device 1, which includes a housing 101. The housing 101 has an outlet 102 at the bottom near the guide plate 2. An electric telescopic plate 103 is installed inside the outlet 102. The guide plate 2 is installed at the corner inside the housing 101. An acoustic vibrator 3 is installed on the side wall near the guide plate 2. A protective shell 301 is installed outside the acoustic vibrator 3. A slot 104 is opened at the top of the housing 101 near the guide plate 2. A slot 105 is opened on both the left and right sides of the slot 104. The slot 105 is engaged with the cleaning component 4.

[0023] In this embodiment, the guide plate 2 is located at the corner inside the housing 101. By changing the direction of flue gas flow, it eliminates eddies and flow deviations, making the flue gas evenly distributed across the cross section of the SCR reactor. The flue gas enters the channel of this device, contacts the dual-gas ammonia injection technology through the rectifier plate and the guide plate 2, and then enters the denitrification reactor and catalyst device. The guide plate 2 can dynamically adjust its angle to adapt to the flow rate changes under different loads, ensuring that the flue gas and ammonia are fully mixed. The acoustic vibrator 3 is installed near the guide plate 2. Its high-frequency vibration can effectively prevent dust from accumulating on the surface of the guide plate 2, avoiding flow field distortion caused by dust accumulation. The protective shell 301 ensures the long-term stable operation of the acoustic vibrator 3 in a high-temperature and high-dust environment, making the gas homogenization gas flow field and flue gas participate in the reaction evenly and improve efficiency.

[0024] The outlet 102 and telescopic plate 103 at the bottom of the housing 101 form an adjustable ash discharge channel. When the cleaning component 4 and the sonic vibrator 3 are working, the detached dust gathers towards the outlet 102 under the action of gravity. The electric telescopic plate 103 can flexibly adjust the opening according to the amount of ash accumulation to avoid short-circuit leakage of flue gas and ensure smooth dust discharge. By adjusting the ash discharge rate in real time, the internal pressure balance of the system is maintained, and the stability of the flow field is guaranteed.

[0025] The cleaning component 4 includes an air storage chamber 401. Inside the air storage chamber 401, a row of partitions 402 are arranged, which divide the air storage chamber 401 into multiple chambers. Each chamber is equipped with an independent electromagnetic air intake valve 404 and an air outlet 405. A filter 403 is installed at the bottom of the electromagnetic air intake valve 404. A retaining strip 406 is provided on both the left and right sides of the air storage chamber 401. The retaining strip 406 is "L" shaped and cooperates with the retaining groove 105. A cover plate 407 is provided on the top of the air storage chamber 401.

[0026] In this embodiment, the cleaning component 4 is installed by engaging with the slot 105 of the housing 101 via a clip 406. Its modular design facilitates maintenance and replacement. The air storage chamber 401 is divided into multiple independent chambers by a partition 402. Each chamber is equipped with an electromagnetic air intake valve 404 and an air outlet 405, which can perform precise high-pressure blowing on different areas of the guide plate 2. The filter 403 ensures that the air entering the electromagnetic air intake valve 404 is clean and avoids blockage. When the system detects an increase in pressure difference or when the running time reaches a set value, the electromagnetic air intake valve 404 opens in sequence, and the high-pressure airflow is ejected from the air outlet 405 to remove dust accumulation on the guide plate 2 and the inner wall of the housing 101. The cover plate 407 protects the internal structure from the corrosion of flue gas.

[0027] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An adjustable airflow guiding and equalizing device for SCR denitrification, comprising an airflow guiding and equalizing device (1), characterized in that: The The airflow distribution device (1) includes a housing (101), a guide plate (2) is provided at the corner of the housing (101), and an acoustic vibrator (3) is provided on the side wall near the guide plate (2). A slot (104) is provided on the top of the housing (101) near the guide plate (2), and slots (105) are provided on both the left and right sides of the slot (104), and the slots (105) are engaged with the cleaning component (4). The cleaning component (4) includes an air storage chamber (401), inside which a row of partitions (402) are arranged, the partitions (402) dividing the air storage chamber (401) into multiple chambers, each of which is provided with an independent electromagnetic air inlet valve (404) and an air outlet (405), and a filter (403) is installed at the bottom of the electromagnetic air inlet valve (404).

2. The adjustable airflow distribution device for SCR denitrification according to claim 1, characterized in that, The acoustic vibrator (3) is provided with a protective shell (301).

3. The adjustable airflow distribution device for SCR denitrification according to claim 1, characterized in that, The box (101) has an outlet (102) at the bottom near the guide plate (2), and a telescopic plate (103) is provided inside the outlet (102).

4. The adjustable airflow distribution device for SCR denitrification according to claim 1, characterized in that, The air storage cavity (401) is provided with a retaining strip (406) on both the left and right sides, and the retaining strip (406) cooperates with the retaining groove (105).

5. The adjustable airflow distribution device for SCR denitrification according to claim 1, characterized in that, The top of the air storage chamber (401) is provided with a cover plate (407).

6. The adjustable airflow distribution device for SCR denitrification according to claim 4, characterized in that, The card strip (406) is L-shaped.

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