Multi-layer composite denitration catalytic reactor

Abstract

The utility model discloses a multilayer composite formula denitration catalytic reactor belongs to flue gas treatment technical field, and this reactor includes the reaction jar and honeycomb board, is equipped with the flow guide mechanism and dredging mechanism, the flow guide mechanism is through the angle of linkage adjustment multiple sets of vane plate of drive component, to initiative optimization jar smoke flow field, the dredging mechanism integration brush, scraper, shower nozzle and telescopic link, can reciprocating motion along the honeycomb board surface, carries out the automation cleaning maintenance, the utility model effectively solved the uneven flue gas flow field in the prior art causes the low denitration efficiency, and the honeycomb board is easy to block and needs to stop the artificial cleaning problem of machine, has the beneficial effect of improving denitration efficiency, realizing equipment on -line self -cleaning, reducing operation and maintenance cost greatly, and the beneficial effect of improving operation stability.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, and in particular to a multi-layer composite denitrification catalytic reactor. Background Technology

[0002] In industrial production processes such as coal-fired power generation and steel smelting, a large amount of flue gas containing nitrogen oxides (NOx) is generated. These gases are the main precursors to acid rain and photochemical smog, posing a serious threat to the environment and human health. Selective catalytic reduction (SCR) technology is one of the most widely used and most efficient flue gas denitrification methods, and its equipment is a denitrification catalytic reactor.

[0003] In conventional denitrification catalytic reactors, honeycomb catalyst plates are typically used as the reaction carrier. When flue gas passes through the pores of the honeycomb plate, it reacts with the injected reducing agent (such as ammonia) under the action of the catalyst to generate harmless nitrogen and water. However, in order to ensure a high denitrification rate, the flue gas must be able to flow uniformly and stably across the entire catalyst cross section. In actual operation, due to the influence of flue structure and airflow inertia, the flue gas flow field entering the reactor is often unevenly distributed, and it is easy to form areas with excessively high or low airflow velocities, i.e., "short circuits" and "dead zones". This results in some catalysts not being fully utilized, while others may fail prematurely, thereby reducing the overall denitrification efficiency of the device.

[0004] Dust, ammonium bisulfate, and other sticky substances in the flue gas will continuously deposit on the surface and inside the pores of the honeycomb plate as the airflow accumulates. With the accumulation of operating time, these deposits will gradually block the pores of the catalyst, which will not only significantly increase the resistance to flue gas flow and increase system energy consumption, but also seriously hinder the effective contact between flue gas and catalyst, resulting in a sharp decline in denitrification performance. At present, the main way to solve the blockage problem is to shut down the machine periodically and have people manually enter the reactor for high-pressure water flushing or mechanical purging. This method is not only labor-intensive and costly to maintain, but also the frequent shutdowns for maintenance seriously affect the continuity and stability of production.

[0005] Therefore, this invention proposes a multi-layer composite denitrification catalytic reactor to address the shortcomings of existing technologies. Utility Model Content

[0006] In view of the problems in the existing multi-layer composite denitrification catalytic reactor, such as uneven distribution of internal flue gas flow field leading to low catalytic efficiency, and the honeycomb plate being prone to clogging after long-term use, requiring manual cleaning and maintenance after shutdown, this utility model aims to provide a multi-layer composite denitrification catalytic reactor with an improved structure that can effectively solve the above problems.

[0007] This invention provides a multi-layer composite denitrification catalytic reactor, including a reaction tank, a honeycomb plate disposed inside the reaction tank, a flow guiding mechanism, and a dredging mechanism.

[0008] The flow guiding mechanism includes multiple sets of blades installed inside the reaction vessel, and a drive assembly for adjusting the angle of the multiple sets of blades in a coordinated manner.

[0009] The unblocking mechanism includes a cleaning component and a moving component for driving the cleaning component to move along the surface of the honeycomb panel.

[0010] Preferably, the drive assembly includes a motor, multiple rotating shafts coaxially connected to multiple sets of blades, multiple gears fixed on the multiple rotating shafts, and a rack that meshes with the multiple gears and is driven by the motor to achieve linear motion.

[0011] Preferably, the flow guiding mechanism further includes a groove for guiding the rack to slide stably, and a sliding block fixed to the rack and slidingly engaging with the groove.

[0012] Preferably, the flow guiding mechanism also includes a fan disposed inside the reaction vessel to accelerate the flow of flue gas.

[0013] Preferably, the moving component is a telescopic rod, and the cleaning component is mounted on the movable end of the telescopic rod via a fixing block.

[0014] Preferably, the cleaning components include a brush and a scraper for cleaning the surface of the honeycomb panel.

[0015] Preferably, the cleaning assembly also includes a nozzle facing the honeycomb panel.

[0016] Preferably, the unblocking mechanism also includes a hot air pump, the outlet of which is used to blow hot air onto the honeycomb panel.

[0017] This utility model has the following beneficial effects: 1. This utility model solves the problem of uneven flue gas flow field and dead flow zone in the reactor, which leads to low denitrification efficiency, by setting a flow guiding mechanism that is driven by a motor to adjust the angle of multiple sets of blades. It achieves the technical effect of actively optimizing the flow field inside the tank and ensuring full and uniform contact between flue gas and catalyst, thereby significantly improving denitrification efficiency.

[0018] 2. This utility model solves the problems of high maintenance costs, high labor intensity, and disruption of production continuity in the prior art by setting up an automated unblocking mechanism that integrates a brush, scraper, nozzle, and hot air pump. It achieves the technical effect of online automated cleaning and drying of honeycomb panels, effectively preventing blockage, extending the service life of catalysts, significantly reducing manual maintenance costs, and improving the stability of equipment operation.

[0019] 3. This utility model solves the problems of single function, dispersed structure and low degree of automation of traditional denitrification systems by highly integrating dynamic flow guidance function and automatic unblocking function into the same reaction tank. It achieves the technical effect of compact equipment structure, multi-functionality, high level of automation, and convenient centralized control and intelligent management. Attached Figure Description

[0020] Figure 1 This is a perspective view of a multi-layer composite denitrification catalytic reactor proposed in this utility model; Figure 2 This is a front view of a multi-layer composite denitrification catalytic reactor proposed in this utility model; Figure 3 This is a partial structural cross-sectional view of a multi-layer composite denitrification catalytic reactor proposed in this utility model; Figure 4 This is a schematic diagram illustrating the structure of a multi-layer composite denitrification catalytic reactor proposed in this utility model.

[0021] Legend: 1. Reaction vessel; 2. Flow guiding mechanism; 201. Motor; 202. Blade; 203. Fan; 204. Shaft; 205. Gear; 206. Rack; 207. Sliding block; 208. Slide groove; 3. Unblocking mechanism; 301. Honeycomb panel; 302. Heat pump; 303. Scraper; 304. Nozzle; 305. Fixing block; 306. Brush; 307. Telescopic rod; 4. Air inlet; 5. Air outlet. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0023] Example: Please refer to Figures 1 to 4 This utility model provides a multi-layer composite denitrification catalytic reactor, which aims to solve the problems of uneven internal flue gas flow field leading to low denitrification efficiency in existing denitrification catalytic reactors, and the easy clogging of catalyst honeycomb plate 301 and difficulty in online automatic cleaning.

[0024] like Figure 1 and Figure 2As shown, the multi-layer composite denitrification catalytic reactor includes a reaction tank 1, which serves as the main body of the entire device and provides a reaction space for flue gas denitrification. The reaction tank 1 is connected to an air inlet 4 for flue gas entry and an air outlet 5 for the treated flue gas discharge. Inside the reaction tank 1, a flow guiding mechanism 2, a dredging mechanism 3, and a honeycomb plate 301 serving as a catalytic reaction carrier are integrated. The flow guiding mechanism 2 is used to dynamically adjust the flue gas flow field distribution entering the reaction tank 1, and the dredging mechanism 3 is used to perform online automatic cleaning of the honeycomb plate 301.

[0025] To address the issue of uneven flue gas flow, the guide mechanism 2 in this embodiment employs a precise mechanical linkage structure to achieve synchronous adjustment of the angles of multiple sets of blades 202.

[0026] Please refer to the following carefully. Figure 3 and Figure 4 The structure of the flow guiding mechanism 2 will be described in detail below: The flow guiding mechanism 2 includes multiple sets of blades 202 and a drive assembly for adjusting the angle of the blades 202 in a linkage manner. The drive assembly includes a motor 201, multiple rotating shafts 204, multiple gears 205, a rack 206, a sliding block 207, and a slide groove 208. The multiple blades 202 are arranged in an array inside the reaction tank 1. Each blade 202 is fixedly connected to a rotating shaft 204. Each rotating shaft 204 is rotatably supported between the opposite inner walls of the reaction tank 1, and a gear 205 is fixedly sleeved on each rotating shaft 204. The rack 206 is disposed inside the reaction tank 1 and extends along its length, and the tooth surface of the rack 206 meshes with the tooth surfaces of all gears 205 for transmission. To ensure the smooth movement of the rack 206, a sliding block 207 is fixedly connected to the rack 206, and a corresponding groove is opened on the inner wall of the reaction tank 1. The sliding groove 208 and the sliding block 207 are in a sliding connection relationship with the sliding groove 208. The motor 201 is fixedly installed on the outside of the reaction tank 1 as a power source. Its output end drives the rack 206 to achieve linear reciprocating motion through the transmission mechanism. When the rack 206 moves, it can drive all the gears 205 to rotate at the same angle through meshing, thereby driving the rotating shaft 204 and the blade 202 fixedly connected to the gears 205 to achieve synchronous deflection. This synchronous transmission structure of gear 205 and rack 206 ensures that the angle adjustment of all blades 202 is accurate and consistent, thereby effectively changing the flue gas flow direction and forming a uniform flow field. In addition, the flow guiding mechanism 2 also includes a fan 203, which is set in the reaction tank 1 near the gas outlet 5 to accelerate the discharge of the treated flue gas while guiding the flow.

[0027] Based on the above embodiments, in order to achieve automated online cleaning of the honeycomb panel 301, the specific structure of the unblocking mechanism 3 of this utility model is as follows: Please continue to refer to Figure 3 and Figure 4 The movable component of the unblocking mechanism 3 is preferably a telescopic rod 307. The fixed end of the telescopic rod 307 is installed on the inner wall of the reaction tank 1, and its movable end is fixedly connected to a fixing block 305. The cleaning component of the unblocking mechanism 3 is integrated on the fixing block 305. The cleaning component specifically includes a brush 306, a scraper 303, and a nozzle 304. The brush 306 and the scraper 303 are fixedly installed side by side on the fixing block 305, so that their working surfaces can closely adhere to the surface of the honeycomb panel 301 to be cleaned. The nozzle 304 is also fixedly installed on the fixing block 305, and its nozzle faces the honeycomb panel 301 for spraying cleaning liquid. As a preferred embodiment, the unblocking mechanism 3 also includes a hot air pump 302. The hot air pump 302 is installed at a suitable position in the reaction tank 1, and its air outlet 5 faces the surface of the honeycomb panel 301 for rapid drying after cleaning.

[0028] Working principle: Flue gas enters the interior of reaction tank 1 through inlet 4 for processing. Then, based on the gas pressure inside reaction tank 1, the angle of the blade 202 needs to be adjusted. During adjustment, motor 201 needs to be started, so that the output end of motor 201 rotates and drives shaft 204 to rotate. The rotation of shaft 204 causes gear 205 to rotate synchronously. Then, gear 205 and rack 206 mesh to enable rack 206 to move. Sliding block 207 and sliding groove 208 make rack 206 slide stably. Finally, rack 206 causes all gears 205 to rotate, and shaft 204 adjusts the angle of blade 202. Fan 203 increases the flow speed of flue gas inside the equipment and it flows out of outlet 5 to complete the gas processing. The flow guide mechanism 2 improves the flow field structure inside reaction tank 1. During the operation of reaction tank 1, the cooperation between blade 202 and honeycomb plate 301 makes the flue gas catalysis more complete. Due to the honeycomb design of honeycomb plate 301, impurities in the flue gas are adsorbed and intercepted. After long-term use, the holes of honeycomb plate 301 are prone to blockage. Then, the telescopic rod 307 is activated to drive the fixed block 305 to move, so that the brush 306 and scraper 303 can fully contact and clean the surface of honeycomb plate 301. At the same time, the nozzle 304 sprays neutralizing liquid to dissolve the impurities adsorbed by honeycomb plate 301. The scraper 303 collects the residual liquid, and finally the hot air pump 302 blows the residual liquid dry to complete the cleaning of the equipment. The unblocking mechanism 3 facilitates the use of the equipment and reduces labor costs.

Claims

1. A multi-layer composite denitrification catalytic reactor, comprising: The reaction vessel (1) is provided with an air inlet (4) and an air outlet (5). The honeycomb panel (301) is installed inside the reaction vessel (1). The multi-layer composite denitrification catalytic reactor is characterized in that it further includes: The flow guiding mechanism (2) is located upstream of the flue gas of the honeycomb plate (301). The flow guiding mechanism (2) includes multiple sets of blades (202), multiple rotating shafts (204) coaxially connected to the blades (202), multiple gears (205) fixed to the rotating shafts (204), and racks (206) meshing with the multiple gears (205). The unblocking mechanism (3) includes at least one cleaning component, the cleaning component including a brush (306) and a scraper (303), and the unblocking mechanism (3) further includes a telescopic rod (307) for driving the cleaning component to reciprocate along the surface of the honeycomb panel (301).

2. The multi-layer composite denitrification catalytic reactor according to claim 1, characterized in that, The flow guiding mechanism (2) also includes a motor (201) for driving the rack (206) to move.

3. The multi-layer composite denitrification catalytic reactor according to claim 2, characterized in that, The flow guiding mechanism (2) further includes a groove (208) for guiding the rack (206) to slide stably, and a sliding block (207) fixed on the rack (206) and slidingly engaged with the groove (208).

4. The multi-layer composite denitrification catalytic reactor according to claim 1, characterized in that, The flow guiding mechanism (2) also includes a fan (203) disposed inside the reaction vessel (1) for accelerating the flow of flue gas.

5. The multi-layer composite denitrification catalytic reactor according to claim 1, characterized in that, The cleaning assembly also includes a nozzle (304) facing the honeycomb panel (301).

6. The multi-layer composite denitrification catalytic reactor according to claim 1, characterized in that, The unblocking mechanism (3) also includes a hot air pump (302), the outlet of which is used to blow hot air onto the honeycomb panel (301).

7. The multi-layer composite denitrification catalytic reactor according to claim 1, characterized in that, The movable end of the telescopic rod (307) is equipped with a fixing block (305).

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