Wet denitration tower for flue gas treatment

Abstract

The utility model discloses a flue gas treatment is with wet method denitration tower relates to flue gas treatment equipment technical field, this denitration tower is on the basis of tower body and corrugated board demister, has added the turbulence mechanism and the cleaning mechanism, and the turbulence mechanism includes rotating shaft, turbulence vane and cloth liquid ring, sets up below the demister, and through the rotation initiative intensification gas -liquid mixing and even cloth liquid, the cleaning mechanism includes inlet pipe and shower nozzle, and carries out the timing spray flushing to the demister. The utility model discloses through initiative turbulence significantly improved denitration efficiency, and through the automatic cleaning effectively prevented the demister blockage, guaranteed that equipment can long -term high -efficient, stable operation.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas treatment equipment, and in particular to a wet denitrification tower for flue gas treatment. Background Technology

[0002] Wet denitrification is a commonly used technology for flue gas treatment. It usually adopts a spray tower structure, where flue gas flows from bottom to top and absorbent liquid is sprayed from top to bottom through nozzles. Nitrogen oxides in the flue gas are absorbed and reacted during contact with the absorbent liquid, thereby achieving the purpose of purification.

[0003] However, in this traditional structure, the contact between flue gas and absorbent is relatively passive, and the flow pattern of the gas and liquid phases is relatively simple. It is prone to "short-circuiting" or "channeling" phenomena due to uneven distribution. That is, some flue gas passes directly through the tower without fully reacting. This results in short gas-liquid contact time and insufficient mass transfer area, which in turn affects the overall denitrification reaction efficiency. In addition, before the flue gas is discharged from the denitrification tower, it needs to pass through the demister at the top of the tower to remove the entrained slurry droplets. During long-term operation, the dust remaining in the flue gas and the suspended matter in the slurry are prone to adhere to the surface of the demister plates and gradually accumulate to form a hard scale layer, causing blockage of the demister channel. This blockage will not only significantly increase the operating resistance of the entire system and increase the energy consumption of the fan, but in severe cases, it will also lead to a decrease in the processing capacity of the denitrification tower, and even require shutdown for manual cleaning, affecting the continuity and stability of production.

[0004] Therefore, this utility model proposes a wet denitrification tower for flue gas treatment to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems existing in the wet denitrification tower for flue gas treatment, such as insufficient contact between flue gas and absorbent liquid leading to low denitrification efficiency, and easy scaling and blockage of the demister at the top of the tower affecting the long-term stable operation of the equipment, this utility model aims to provide a wet denitrification tower for flue gas treatment with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a wet denitrification tower for flue gas treatment, comprising: a denitrification tower one, and a corrugated plate demister disposed on the upper part of the denitrification tower one; and a turbulence evacuation mechanism disposed below the corrugated plate demister and a cleaning mechanism for rinsing the corrugated plate demister.

[0007] The turbulence mechanism includes a rotating shaft vertically disposed inside the denitrification tower, turbulence vanes fixed to the rotating shaft, and a liquid distribution ring sleeved on the rotating shaft.

[0008] Furthermore, the cleaning mechanism includes a water inlet pipe fixed to the wall of the denitrification tower, and a spray head connected to the water inlet pipe with its nozzle facing the corrugated plate demister. Through the structural combination of the above components, active turbulence mixing of flue gas and automatic cleaning of the demister are achieved.

[0009] Preferably, the turbulence mechanism further includes a motor for driving the rotating shaft to rotate, a worm gear connected to the output end of the motor, and a worm wheel meshing with the worm gear and coaxially fixed to the rotating shaft.

[0010] Preferably, the liquid distribution ring is provided with a liquid distribution orifice plate, and the liquid distribution orifice plate is provided with inclined holes for spraying out slurry.

[0011] Preferably, a sealing gasket is provided between the liquid distribution ring and the rotating shaft to prevent slurry leakage.

[0012] Preferably, the turbulence-disrupting mechanism further includes a blade retaining ring, which connects the outer edges of the plurality of turbulence-disrupting blades into one unit.

[0013] Preferably, the water inlet pipe is fixed to the inner wall of the denitrification tower by a connecting rod and a pipe clamp.

[0014] Preferably, the cleaning mechanism further includes a slurry collection hopper located below the corrugated plate demister, and the outlet of the slurry collection hopper is connected to the inlet of the return pump via a connecting pipe.

[0015] Preferably, the outlet of the reflux pump is connected to a check valve.

[0016] This utility model has the following beneficial effects: 1. This utility model solves the problems of insufficient contact between flue gas and absorbent liquid, single gas-liquid flow pattern, and easy short circuit in the prior art, which lead to low denitrification efficiency, by setting a turbulence mechanism composed of a rotating shaft driven by a motor, turbulence blades and liquid distribution ring. It achieves the technical effect of actively enhancing gas-liquid mixing, extending flue gas residence time, and achieving uniform liquid distribution, thereby significantly improving the denitrification reaction efficiency.

[0017] 2. This utility model solves the problems of scale buildup and blockage, increased system pressure drop, need for manual cleaning and shutdown, and impact on equipment stability in the prior art by setting up a cleaning mechanism that includes a water inlet pipe, spray head, slurry collection hopper and return pump. It achieves the technical effect of automatically and regularly flushing the demister, effectively preventing blockage, ensuring long-term stable operation of the system, and recycling the slurry.

[0018] 3. This utility model solves the problem of balancing efficiency and stability in traditional denitrification towers by organically combining the active turbulence enhancement mechanism with the automated cleaning and maintenance mechanism. It achieves the technical effect of enabling the equipment to maintain high denitrification efficiency while achieving long-term, stable, and low-maintenance operation. The overall structure is compact and highly practical. Attached Figure Description

[0019] Figure 1 This is a perspective view of the wet denitrification tower for flue gas treatment proposed in this utility model; Figure 2 This is a schematic diagram of the cleaning mechanism of the wet denitrification tower for flue gas treatment proposed in this utility model; Figure 3 This is a schematic diagram of the turbulence mechanism of the wet denitrification tower for flue gas treatment proposed in this utility model; Figure 4 This is a partial structural breakdown diagram of the wet denitrification tower for flue gas treatment proposed in this utility model.

[0020] Legend: 1. Denitrification Tower 1; 2. Cleaning Mechanism; 201. Corrugated Plate Demister; 202. Inlet Pipe; 203. Connecting Rod; 204. Pipe Clamp; 205. Spray Head; 206. Slurry Collection Hopper; 207. Connecting Pipe; 208. Return Pump; 209. One-Way Valve; 3. Turbulence Mechanism; 301. Liquid Distribution Ring; 302. Liquid Distribution Orifice Plate; 303. Sealing Gasket; 304. Rotating Shaft; 305. Turbulence Blade; 306. Blade Fixing Ring; 307. Worm Gear; 308. Worm; 309. Motor. Detailed Implementation

[0021] 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.

[0022] Example: Please refer to Figures 1 to 4 This utility model provides a wet denitrification tower for flue gas treatment, which aims to solve the problems of low denitrification efficiency caused by uneven mixing of flue gas and absorbent liquid, and easy scaling and clogging of demisters in the prior art.

[0023] like Figure 1 and Figure 2As shown, the wet denitrification tower for flue gas treatment includes a denitrification tower 1 as the reaction and support tower body, and a corrugated plate demister 201 for gas-liquid separation is fixed at the upper part of the interior of the denitrification tower 1.

[0024] To solve the above-mentioned technical problems, the technical solution of this embodiment is that the wet denitrification tower for flue gas treatment further includes a turbulence mechanism 3 disposed below the corrugated plate demister 201, and a cleaning mechanism 2 for rinsing the corrugated plate demister 201.

[0025] Please refer to the following carefully. Figure 1 , Figure 3 and Figure 4 The structure of the turbulence mechanism 3 is described below. The turbulence mechanism 3 includes a rotating shaft 304 vertically installed inside the denitrification tower 1, and turbulence blades 305 fixedly connected to the rotating shaft 304. A liquid distribution ring 301 is also sleeved on the rotating shaft 304. A liquid distribution orifice plate 302 is fixed on the liquid distribution ring 301. Inclined spray holes are opened on the liquid distribution orifice plate 302. A sealing gasket 303 made of nitrile rubber is also provided between the liquid distribution ring 301 and the rotating shaft 304. The turbulence mechanism 3 also includes a blade fixing ring 306, which connects the outer edges of multiple turbulence blades 305 into one piece to prevent them from falling off. The driving part of the turbulence mechanism 3 includes a motor 309 installed outside the denitrification tower 1. A worm gear 308 is connected to the output end of the motor 309. The worm gear 308 is meshed with a worm wheel 307, which is coaxially fixed to the rotating shaft 304.

[0026] Please refer to the following carefully. Figure 1 and Figure 2 The structure of the cleaning mechanism 2 is described below. The cleaning mechanism 2 includes a water inlet pipe 202 fixed to the inner wall of the denitrification tower 1. The water inlet pipe 202 is fixed by a connecting rod 203 and a pipe clamp 204. Multiple spray heads 205 are connected to the water inlet pipe 202. The nozzles of the spray heads 205 face the corrugated plate demister 201. A slurry collection hopper 206 is set below the corrugated plate demister 201. The outlet of the slurry collection hopper 206 is connected to the inlet of the return pump 208 through a connecting pipe 207. A one-way valve 209 is connected to the outlet of the return pump 208. This combination of structures enhances the gas-liquid mixing effect through the active rotation turbulence and uniform liquid distribution of the turbulence mechanism 3. At the same time, the timed spray rinsing and slurry recovery of the cleaning mechanism 2 ensure the long-term cleanliness of the demister and the stable operation of the system.

[0027] Based on the above embodiments, the present invention may further include the following preferred technical solutions: Please refer to Figure 3The turbulence mechanism 3 also includes a motor 309 that drives the rotating shaft 304 to rotate, a worm gear 308 connected to the output end of the motor 309, and a worm wheel 307 that meshes with the worm gear 308 and is coaxially fixed to the rotating shaft 304; the liquid distribution ring 301 is provided with a liquid distribution orifice plate 302, and the liquid distribution orifice plate 302 has inclined holes for spraying out slurry; a sealing gasket 303 is provided between the liquid distribution ring 301 and the rotating shaft 304 to prevent slurry leakage; the turbulence mechanism 3 also includes a blade fixing ring 306, which connects the outer edges of multiple turbulence blades 305 into one piece; please refer to Figure 2 The inlet pipe 202 is fixed to the inner wall of the denitrification tower 1 by the connecting rod 203 and the pipe clamp 204; the cleaning mechanism 2 also includes a slurry collection hopper 206 located below the corrugated plate demister 201. The outlet of the slurry collection hopper 206 is connected to the inlet of the reflux pump 208 by the connecting pipe 207. The outlet of the reflux pump 208 is connected to a one-way valve 209.

[0028] Working principle: The cleaning mechanism 2 enables the demister to self-clean. When the flue gas that has completed the denitrification reaction enters the demisting area, it first contacts the corrugated plate demister 201, causing the flue gas to undergo a violent change in direction during its flow. Due to inertia, the droplets in the flue gas collide with the corrugated plate wall of the corrugated plate demister 201. After the droplets gather on the plate wall to form larger droplets, they drip down along the plate wall under the action of gravity, thus initially achieving gas-liquid separation. On the other hand, the two connecting rods 203 fixed to the tower wall of the denitrification tower 1 and the pipe clamps... The clamp 204 and the inlet pipe 202 are fixed together, and high-pressure water is sprayed onto the corrugated plate demister 201 at regular intervals. The high-pressure water is converted into water mist through the spray head 205. The water mist can wash away the fine impurities and slurry residues attached to the surface of the corrugated plate demister 201, preventing the blockage of the inter-plate channel in the early stage of scaling. The droplets that fall during the demister process fall into the slurry collection hopper 206 below. The slurry flows into the return pump 208 through the connecting pipe 207, is pressurized, and then transported to another place for reuse through the one-way valve 209. The turbulence mechanism 3 enhances the effect of the reducing agent through active turbulence and stratified liquid distribution. After the external motor 309 starts, it drives the worm 308 connected to its output end to rotate. Since the worm 308 and the worm wheel 307 are meshed with each other, the rotation of the worm 308 drives the worm wheel 307 to rotate, which in turn drives the rotating shaft 304 to rotate. The rotating shaft 304 causes the turbulence blades 305 to rotate and form vortices, breaking the flue gas flow pattern, prolonging the residence time and avoiding short circuits. At the same time, the liquid distribution ring 301 sprays out the slurry in the liquid distribution ring 301 through the inclined holes on the liquid distribution orifice plate 302, covering the entire area inside the denitrification tower 1. The sealing gasket 303 is made of nitrile rubber and is embedded in the gap between the liquid distribution ring 301 and the rotating shaft 304 to prevent the slurry from leaking from the shaft gap. The blade fixing ring 306 can prevent the turbulence blades 305 from falling off.

Claims

1. A wet denitrification tower for flue gas treatment, comprising: Denitrification tower 1 (1), and corrugated plate demister (201) disposed on the upper part of the denitrification tower 1 (1); Its features are, The wet denitrification tower for flue gas treatment also includes a turbulence mechanism (3) disposed below the corrugated plate demister (201) and a cleaning mechanism (2) for rinsing the corrugated plate demister (201). The turbulence mechanism (3) includes a rotating shaft (304) vertically arranged in the denitrification tower (1), a turbulence vane (305) fixed to the rotating shaft (304), and a liquid distribution ring (301) sleeved on the rotating shaft (304). The cleaning mechanism (2) includes an inlet pipe (202) fixed to the wall of the denitrification tower (1) and a spray head (205) connected to the inlet pipe (202) and with the nozzle facing the corrugated plate demister (201).

2. The wet denitrification tower for flue gas treatment according to claim 1, characterized in that, The turbulence mechanism (3) further includes a motor (309) that drives the rotating shaft (304) to rotate, a worm (308) connected to the output end of the motor (309), and a worm wheel (307) that meshes with the worm (308) and is coaxially fixed to the rotating shaft (304).

3. The wet denitrification tower for flue gas treatment according to claim 1, characterized in that, The liquid distribution ring (301) is provided with a liquid distribution orifice plate (302), and the liquid distribution orifice plate (302) is provided with inclined holes for spraying out slurry.

4. The wet denitrification tower for flue gas treatment according to claim 1, characterized in that, A sealing gasket (303) for preventing slurry leakage is provided between the liquid distribution ring (301) and the rotating shaft (304).

5. The wet denitrification tower for flue gas treatment according to claim 1, characterized in that, The turbulence mechanism (3) further includes a blade fixing ring (306), which connects the outer edges of the plurality of turbulence blades (305) into one unit.

6. The wet denitrification tower for flue gas treatment according to claim 1, characterized in that, The inlet pipe (202) is fixed to the inner wall of the denitrification tower (1) by a connecting rod (203) and a pipe clamp (204).

7. The wet denitrification tower for flue gas treatment according to claim 1, characterized in that, The cleaning mechanism (2) also includes a slurry collection hopper (206) located below the corrugated plate demister (201), and the outlet of the slurry collection hopper (206) is connected to the inlet of the return pump (208) via a connecting pipe (207).

8. The wet denitrification tower for flue gas treatment according to claim 7, characterized in that, The outlet of the reflux pump (208) is connected to a check valve (209).

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