Flue guide plate structure

Abstract

The utility model discloses a flue guide plate structure relates to flue guide plate technical field, including reactor, one side fixed connection of reactor has flue, the inside fixed connection of flue has guide component, the inside fixed connection of reactor has even flow subassembly, the bottom of even flow subassembly is provided with catalyst layer, the guide component includes fixed frame, and fixed frame is fixed in the inside of flue, the inside of fixed frame is provided with bolt. This flue guide plate structure is through setting up the first guide plate of arc and with the angle of flue inner wall, realizes the airflow from the right angle to the gentle transition, avoids vortex, reduces energy loss, sets up first, second baffle, utilizes dust inertia and makes its twice collision separation, promotes dust trapping effect, sets up dust removal groove and electric dust valve, realizes the dusting of timing, sets up second guide plate and further carding airflow, makes it even stable flow into reactor, guarantees the system high -efficient stable operation.

Description

Technical Field

[0001] This utility model relates to the field of flue guide plate technology, specifically a flue guide plate structure. Background Technology

[0002] SCR reactors, or selective catalytic reduction reactors, are key equipment in the environmental protection field used to reduce nitrogen oxide emissions from flue gas. Through the action of a catalyst, reducing agents such as ammonia or urea react with NOx to produce harmless nitrogen and water vapor. These reactors are widely used in thermal power plants, cement kilns, marine diesel engines, and other fields. They have advantages such as high denitrification efficiency, strong adaptability, and no secondary pollution. Their core components include a catalyst module and a rectifier grid. Through optimized design, they ensure that flue gas and reducing agents are fully mixed to achieve efficient denitrification.

[0003] In existing SCR reactors, the right-angle turn of the flue at the inlet creates severe flow field problems, easily forming local vortex zones. This turbulent flow prevents sufficient mixing of NH3 and NOx after ammonia injection, leading to localized ammonia escape exceeding 10 mg / m³. Simultaneously, localized denitrification efficiency is low, wasting ammonia resources, increasing operating costs, and causing corrosion and other adverse effects on downstream equipment. Furthermore, the uneven flow field results in unstable denitrification efficiency and difficulty in effectively controlling denitrification emission concentrations, failing to meet increasingly stringent environmental emission requirements. Therefore, we urgently need a flue gas guide plate structure to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide a flue gas deflector structure to solve the problems mentioned in the background art, such as the energy loss caused by eddy currents due to the turning of the existing flue gas flow, incomplete dust separation, and unstable airflow entering the reactor.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flue gas guide plate structure, including a reactor, a flue gas fixedly connected to one side of the reactor, a flow guiding component fixedly connected inside the flue gas, a flow equalization component fixedly connected inside the reactor, a catalyst layer disposed at the bottom of the flow equalization component, the flow guiding component including a fixing frame, the fixing frame being fixed inside the flue gas, bolts disposed inside the fixing frame, a first flow guiding plate fixedly connected to one side of the fixing frame, a first baffle fixedly connected to the inner wall of the flue gas, a second baffle fixedly connected to one side of the first baffle, a dust removal trough fixedly connected to the bottom of the flue gas, an electric ash discharge valve connected to the bottom flange of the dust removal trough, and a second flow guiding plate disposed on one side of the second baffle.

[0006] Preferably, the flue forms an airflow regulating structure through a first guide plate and a second guide plate, with the first guide plate disposed inside the flue and the second guide plate disposed inside the reactor.

[0007] Preferably, the first baffle and the dust removal trough form a collision dust removal structure through the second baffle, and both the first baffle and the second baffle are set at the top of the dust removal trough, and the top of the dust removal trough is fixedly connected to the bottom of the flue.

[0008] Preferably, there are four first guide vanes, which are arc-shaped and have an angle of 15° to 20° between the first guide vane and the inner wall of the flue.

[0009] Preferably, the flow equalization component includes a high-frequency acoustic soot blower, which is fixed to one side of the reactor. A first grid plate is fixedly connected inside the reactor. The first grid plate has a first rectangular hole inside, and a wear-resistant protrusion is fixedly connected to the inner wall of the first rectangular hole. A second grid plate is provided at the bottom of the first grid plate. The second grid plate has a second rectangular hole inside, and a stainless steel filter screen is fixedly connected to the inner wall of the second rectangular hole.

[0010] Preferably, the first rectangular hole and the second rectangular hole form an alternating arrangement structure, and the channels of the first rectangular hole and the channels of the second rectangular hole are staggered by 45°.

[0011] Preferably, there are multiple wear-resistant protrusions on the first rectangular hole, and all of the multiple wear-resistant protrusions are disposed on the inner wall of the first rectangular hole.

[0012] Preferably, there are multiple stainless steel filter screens on the second rectangular hole, and all of the multiple stainless steel filter screens are embedded inside the second rectangular hole.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In the scheme of this application:

[0015] 1. To address the issues of energy loss, incomplete dust separation, and unstable airflow entering the reactor caused by eddy currents during flue gas flow turning in existing technologies, this application utilizes a first guide plate with an arc shape and an angle to the inner wall of the flue to achieve a smooth transition from right-angle turning of the airflow, avoiding eddy currents and reducing energy loss. First and second baffles are installed to utilize dust inertia for two-stage collision separation, improving dust collection efficiency. A dust collection trough and an electric ash discharge valve are installed to achieve timed ash discharge. A second guide plate further streamlines the airflow, ensuring it flows evenly and stably into the reactor, thus guaranteeing efficient and stable system operation.

[0016] 2. To address the problems of uneven airflow distribution, easy equipment wear, easy penetration of fine particles causing damage to subsequent catalyst layers, and high operation and maintenance costs in existing technologies, this application sets up a first grid plate and a second grid plate, and arranges the first rectangular holes and the second rectangular holes at a 45° stagger. This achieves the effect of avoiding direct airflow penetration and improving the uniformity of airflow distribution. By setting multiple wear-resistant protrusions on the inner wall of the first rectangular hole, the direct impact and wear of the airflow on the inner wall is reduced. By setting multiple stainless steel filters in the second rectangular hole, fine particles ≥50μm are efficiently intercepted, providing reliable pre-protection for the catalyst layer and effectively reducing operation and maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the reactor and catalyst layer structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the flow guiding component structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the flow equalization component of this utility model.

[0021] In the diagram: 1. Reactor; 2. Flue; 3. Flow guiding assembly; 301. Fixing frame; 302. Bolt; 303. First flow guide plate; 304. First baffle; 305. Second baffle; 306. Dust removal trough; 307. Electric ash discharge valve; 308. Second flow guide plate; 4. Flow equalization assembly; 401. High-frequency acoustic soot blower; 402. First grid plate; 403. First rectangular hole; 404. Wear-resistant ridge; 405. Second grid plate; 406. Second rectangular hole; 407. Stainless steel filter screen; 5. Catalyst layer. Detailed Implementation

[0022] 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.

[0023] This utility model embodiment provides a flue gas deflector structure, such as... Figure 1 , Figure 2 and Figure 3As shown, the system includes a reactor 1, a flue 2 fixedly connected to one side of the reactor 1, a flow guiding assembly 3 fixedly connected inside the flue 2, a flow equalization assembly 4 fixedly connected inside the reactor 1, a catalyst layer 5 disposed at the bottom of the flow equalization assembly 4, a fixing frame 301 fixed inside the flue 2, bolts 302 disposed inside the fixing frame 301, a first guide plate 303 fixedly connected to one side of the fixing frame 301, a first baffle 304 fixedly connected to the inner wall of the flue 2, a second baffle 305 fixedly connected to one side of the first baffle 304, a dust collection trough 306 fixedly connected to the bottom of the flue 2, an electric ash discharge valve 307 connected to the bottom flange of the dust collection trough 306, and a second guide plate 308 disposed on one side of the second baffle 305. When airflow is introduced into the flue 2, the airflow first reaches the first guide plate 303, and due to the first guide plate... The flow plate 303 is an arc-shaped plate with a certain angle to the inner wall of the flue 2, which can guide the flue gas from the original "right-angle turn" to a "smooth transition". This can effectively avoid the generation of eddies at the inlet and reduce the loss of airflow energy. When the airflow encounters the first baffle 304, it will be forced to change its flow direction. Due to its large inertia, the dust cannot turn quickly with the airflow and will collide with the first baffle 304 for initial separation. The airflow continues to flow to the second baffle 305, where it is forced to turn again. This causes the fine dust that was not captured by the first baffle 304 to be separated again at the second baffle 305 due to inertial collision. Afterward, the dust falls into the dust collection tank 306 by gravity. The ash is discharged at timed intervals by activating the electric ash discharge valve 307. The airflow continues to move forward and reaches the second guide plate 308, which can further straighten the airflow direction and make it flow evenly and stably into the reactor 1.

[0024] Furthermore, such as Figure 1 and Figure 3 As shown, the flue 2 forms an airflow regulation structure through the first guide plate 303 and the second guide plate 308. The first guide plate 303 is set inside the flue 2, and the second guide plate 308 is set inside the reactor 1. The first guide plate 303 and the second guide plate 308 allow the airflow to enter the flue 2, smoothly turn and avoid eddies through the first guide plate 303, and then be oriented by the second guide plate 308, so as to achieve stable and smooth flow in the equipment.

[0025] Furthermore, such as Figure 3As shown, the first baffle 304 and the dust collection trough 306 form a collision dust removal structure through the second baffle 305. Both the first baffle 304 and the second baffle 305 are set on the top of the dust collection trough 306, and the top of the dust collection trough 306 is fixedly connected to the bottom of the flue 2. Through the first baffle 304 and the second baffle 305, the dust-laden airflow is forced to change direction when it encounters the first baffle 304. The dust is separated due to inertia when it hits the baffle. The remaining airflow is separated again when it encounters the second baffle 305. The dust separated twice can fall into the dust collection trough 306 below by gravity and be collected.

[0026] Furthermore, such as Figure 3 As shown, there are four first guide plates 303, and they are arc-shaped. The angle between the first guide plate 303 and the inner wall of the flue 2 is 15°~20°. By setting the first guide plate 303, the flue gas can be guided from "right angle turn" to "smooth transition" to avoid vortex at the inlet of flue 2.

[0027] In a further preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 4 As shown, the flow equalization component 4 includes a high-frequency acoustic soot blower 401, which is fixed to one side of the reactor 1. A first grid plate 402 is fixedly connected inside the reactor 1. A first rectangular hole 403 is opened inside the first grid plate 402, and a wear-resistant protrusion 404 is fixedly connected to the inner wall of the first rectangular hole 403. A second grid plate 405 is provided at the bottom of the first grid plate 402. A second rectangular hole 406 is opened inside the second grid plate 405, and a stainless steel filter is fixedly connected to the inner wall of the second rectangular hole 406. The airflow passes through the first grid plate 402 and the second grid plate 405. The first rectangular hole 403 and the second rectangular hole 406 are arranged at an angle of 45° to avoid the airflow "directly passing through" and improve the uniformity of airflow distribution. The multiple wear-resistant ridges 404 set in the inner wall of the first rectangular hole 403 can reduce the direct impact and wear of the airflow on the inner wall. The multiple stainless steel filter screens 407 set in the second rectangular hole 406 can efficiently intercept fine particles ≥50μm, providing reliable pre-protection for the catalyst layer 5 and reducing operation and maintenance costs.

[0028] Furthermore, such as Figure 4 As shown, the first rectangular hole 403 and the second rectangular hole 406 form an alternating arrangement structure, and the channels of the first rectangular hole 403 and the second rectangular hole 406 are staggered by 45°, which helps to avoid the airflow "directly passing through" and forming a local high-speed zone, thereby improving the uniformity of airflow distribution.

[0029] Furthermore, such as Figure 4As shown, there are multiple wear-resistant protrusions 404 on the first rectangular hole 403, and all of the multiple wear-resistant protrusions 404 are set on the inner wall of the first rectangular hole 403. By setting multiple wear-resistant protrusions 404, the direct impact and wear of airflow on the inner wall can be reduced, the service life of the channel can be extended, and the airflow can be adjusted, turbulence reduced, roughness increased and friction improved, which is conducive to stable material conveying.

[0030] Furthermore, such as Figure 4 As shown, there are multiple stainless steel filter screens 407 on the second rectangular hole 406, and all of the multiple stainless steel filter screens 407 are embedded inside the second rectangular hole 406. By setting multiple stainless steel filter screens 407, fine particles ≥50μm can be efficiently intercepted, preventing them from entering the catalyst layer 5 and causing blockage, wear, and reduced catalyst activity. They are resistant to high temperature and corrosion, and can operate stably for a long time, providing reliable pre-protection for the catalyst, extending the replacement cycle, and reducing operation and maintenance costs.

[0031] Working principle: When airflow enters the flue 2, the airflow first reaches the first guide plate 303. Since the first guide plate 303 is an arc-shaped plate with a certain angle to the inner wall of the flue 2, it can guide the flue gas from its original right angle to a smooth transition, which can effectively avoid the generation of eddies at the inlet and reduce the loss of airflow energy. Subsequently, when the airflow encounters the first baffle 304, it will be forced to change its flow direction. Due to its large inertia, the dust cannot turn quickly with the airflow and will collide with the first baffle 304 for initial separation. The airflow continues to flow to the second baffle 305, where it is forced to turn again. This causes the fine dust that was not captured by the first baffle 304 to be separated again at the second baffle 305 due to inertial collision. Afterward, the dust falls into the dust collection tank 306 by gravity. By activating the electric ash discharge valve 307 for timed ash discharge, the airflow continues to advance and reaches the second guide plate 308, which further organizes the airflow direction, making it flow evenly and stably into the reactor 1. The airflow passes through the first grid plate 402 and the second grid plate 405, and the first rectangular hole 403 and the second rectangular hole 406 are arranged at an angle of 45° to avoid the airflow "directly passing through" and improve the uniformity of airflow distribution. The multiple wear-resistant ridges 404 set on the inner wall of the first rectangular hole 403 can reduce the direct impact and wear of the airflow on the inner wall. The multiple stainless steel filter screens 407 set in the second rectangular hole 406 can efficiently intercept fine particles ≥50μm, providing reliable pre-protection for the catalyst layer 5 and reducing operation and maintenance costs.

[0032] 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 illustrative 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. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A flue gas deflector structure, comprising a reactor (1), characterized in that: A flue (2) is fixedly connected to one side of the reactor (1). A flow guiding component (3) is fixedly connected inside the flue (2). A flow equalization component (4) is fixedly connected inside the reactor (1). A catalyst layer (5) is provided at the bottom of the flow equalization component (4). The flow guiding component (3) includes a fixing frame (301), which is fixed inside the flue (2). Bolts (302) are provided inside the fixing frame (301). A first flow guide plate (303) is fixedly connected to one side of the fixing frame (301). A first baffle (304) is fixedly connected to the inner wall of the flue (2). A second baffle (305) is fixedly connected to one side of the first baffle (304). A dust removal trough (306) is fixedly connected to the bottom of the flue (2). An electric ash discharge valve (307) is connected to the bottom flange of the dust removal trough (306). A second flow guide plate (308) is provided on one side of the second baffle (305).

2. The flue gas deflector structure according to claim 1, characterized in that: The flue (2) forms an airflow regulating structure through the first guide plate (303) and the second guide plate (308), and the first guide plate (303) is located inside the flue (2), and the second guide plate (308) is located inside the reactor (1).

3. The flue gas deflector structure according to claim 1, characterized in that: The first baffle (304) forms a collision dust removal structure with the dust removal trough (306) through the second baffle (305), and both the first baffle (304) and the second baffle (305) are set on the top of the dust removal trough (306), and the top of the dust removal trough (306) is fixedly connected to the bottom of the flue (2).

4. The flue gas deflector structure according to claim 1, characterized in that: The number of the first guide plate (303) is four, and the shape is arc-shaped. The angle between the first guide plate (303) and the inner wall of the flue (2) is 15°~20°.

5. The flue gas deflector structure according to claim 1, characterized in that: The flow equalization component (4) includes a high-frequency acoustic soot blower (401), and the high-frequency acoustic soot blower (401) is fixed on one side of the reactor (1). A first grid plate (402) is fixedly connected inside the reactor (1). A first rectangular hole (403) is opened inside the first grid plate (402). A wear-resistant protrusion (404) is fixedly connected to the inner wall of the first rectangular hole (403). A second grid plate (405) is provided at the bottom of the first grid plate (402). A second rectangular hole (406) is opened inside the second grid plate (405). A stainless steel filter screen (407) is fixedly connected to the inner wall of the second rectangular hole (406).

6. The flue gas deflector structure according to claim 5, characterized in that: The first rectangular hole (403) and the second rectangular hole (406) form an alternating arrangement structure, and the channel of the first rectangular hole (403) and the channel of the second rectangular hole (406) are arranged at a 45° offset.

7. The flue gas deflector structure according to claim 5, characterized in that: The first rectangular hole (403) has multiple wear-resistant protrusions (404), and all the wear-resistant protrusions (404) are arranged on the inner wall of the first rectangular hole (403).

8. The flue gas deflector structure according to claim 5, characterized in that: There are multiple stainless steel filter screens (407) on the second rectangular hole (406), and all of the multiple stainless steel filter screens (407) are embedded inside the second rectangular hole (406).

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