Deacidification tower prevents outlet flue from being blocked

Abstract

The utility model discloses a kind of deacidification tower anti-blocking outlet flue, including Venturi section, smoke outlet, expansion joint and vibrator, the smoke outlet is communicated with the contraction section of Venturi section by expansion joint, vibrator is equipped on the smoke outlet, the downside wall of the smoke outlet is inclinedly arranged with front low and rear high, the diffusion end of Venturi section is equipped with elbow, compared with prior art, can reduce the phenomenon of plugging while improving dry deacidification efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas purification, and in particular to the technical field of preventing the outlet flue of a deacidification tower from clogging. Background Technology

[0002] The blockage of the flue gas from the SDA outlet to the bag filter inlet is mainly related to the following factors: 1. Complex flue gas composition and high moisture content: The flue gas produced by municipal solid waste incineration has a complex composition and a high moisture content, usually above 20%. After SDA deacidification, the injection of a certain concentration of slurry will further increase the moisture content of the flue gas, making it more viscous; 2. Flue gas velocity: Considering the ash concentration in the flue gas, to avoid wear and improve the efficiency of dry deacidification, the velocity in this section is designed not to exceed 12 m / s; 3. Quicklime and activated carbon injection: The injection inlets for quicklime and activated carbon are located on the flue gas from the SDA outlet to the bag filter inlet, and are usually located at the top of the flue gas duct, using single-point injection; 4. Lack of rapping or fluidization system: The flue gas from municipal solid waste incineration has a high viscosity. When the load is low or during maintenance, if local ash accumulates, it can easily cause blockage and increase the resistance of the flue gas duct.

[0003] In several operating projects, the flue gas duct from the SAD outlet to the bag filter inlet is blocked to varying degrees. The waste composition is complex and has a high moisture content. After acid removal by SDA, the moisture content will increase further, making the flue gas at the SDA tower outlet more viscous. In addition, the addition of quicklime and activated carbon in this area further increases the viscosity of the flue gas. Currently, the flue gas duct from the SAD outlet to the bag filter inlet in several operating projects is blocked to varying degrees, which increases the difficulty of later operation and maintenance, and also makes the project acceptance more difficult. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art by proposing an anti-clogging outlet flue for deacidification towers, which can reduce clogging while improving the efficiency of dry deacidification.

[0005] To achieve the above objectives, this utility model proposes an anti-clogging outlet flue for a deacidification tower, comprising a Venturi section, a flue outlet, an expansion joint, and a vibrator. The flue outlet is connected to the contraction section of the Venturi section through the expansion joint. A vibrator is provided on the flue outlet. The lower sidewall of the flue outlet is inclined with a lower front and a higher rear. The diffuser end of the Venturi section is provided with an elbow.

[0006] Preferably, the circumference of the elbow input end is provided with a slaked lime spray inlet and an activated carbon spray inlet connected thereto. The slaked lime spray inlet is located in front of the activated carbon spray inlet. Both the slaked lime spray inlet and the activated carbon spray inlet are connected to a spray pipe located inside the elbow. Each spray pipe is provided with multiple nozzles.

[0007] Preferably, the elbow is an arc-shaped elbow, and the arc-shaped bottom of the elbow is provided with a ash pipe, and the ash pipe is provided with a slide valve.

[0008] Preferably, the elbow has several backflush ports at its arc-shaped bottom, which are connected to a backflush air supply pipe, and the backflush air supply pipe is equipped with a gate valve.

[0009] Preferably, the elbow is provided with a wear-resistant layer.

[0010] Preferably, a manhole is provided on one side of the elbow input end.

[0011] Preferably, the front end of the flue gas outlet is provided with a fixed inner ring, the outer ring of the fixed inner ring is provided with a rubber ring, the outer ring of the rubber ring is provided with a fixed outer ring, the fixed outer ring is provided with a guide plate fixed on the deacidification tower body, and the guide plate is provided with a through hole located inside the fixed outer ring.

[0012] Preferably, the inner ring is provided with an inner retaining ring located inside the rubber ring, and the outer ring is provided with an outer retaining ring located outside the rubber ring, wherein the outer diameter of the outer retaining ring is larger than the inner diameter of the inner retaining ring.

[0013] The beneficial effects of this utility model are as follows: By connecting the flue outlet to the contraction section of the Venturi section through an expansion joint, this utility model increases the Venturi section, avoiding blockage of the straight section inlet flue at low loads. The diffusion section of the Venturi achieves a turbulent flow effect, which is more conducive to the absorption of pollutants by the slaked lime and activated carbon injected in this section, thereby improving the deacidification efficiency and heavy metal removal efficiency. A vibrator is installed on the flue outlet, which drives the flue outlet to vibrate, reducing the phenomenon of blockage at the flue outlet. The lower side wall of the flue outlet is inclined at the front and high at the back, which is conducive to the return of the dust shaken off and the large particles of ash settled inside to the tower. Compared with the prior art, this utility model can reduce the phenomenon of blockage while improving the dry deacidification efficiency.

[0014] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an anti-clogging outlet flue of a deacidification tower according to this utility model; Figure 2 This is a schematic diagram showing the connection between the smoke outlet and the guide ramp.

[0016] In the diagram: 1-Venturi section, 2-Smoke outlet, 3-Expansion joint, 4-Vibrator, 5-Elbow, 6-Slaked lime spray inlet, 7-Activated carbon spray inlet, 8-Lower ash pipe, 9-Insert valve, 10-Backflush port, 11-Backflush air supply pipe, 12-Gate valve, 13-Manhole, 14-Fixed inner ring, 15-Rubber ring, 16-Fixed outer ring, 17-Guide inclined plate, 18-Inner retaining ring, 19-Outer retaining ring, 110-Through hole. Detailed Implementation

[0017] See Figure 1 , Figure 2 This utility model discloses an anti-clogging outlet flue for a deacidification tower, comprising a Venturi section 1, a flue outlet 2, an expansion joint 3, and a vibrator 4. The flue outlet 2 is connected to the contraction section of the Venturi section 1 through the expansion joint 3. The flue outlet 2 is equipped with a vibrator 4. The lower sidewall of the flue outlet 2 is inclined with a lower front and a higher rear. The diffuser end of the Venturi section 1 is provided with an elbow 5.

[0018] The circumference of the input end of the elbow 5 is provided with a slaked lime injection inlet 6 and an activated carbon injection inlet 7 connected thereto. The slaked lime injection inlet 6 is located in front of the activated carbon injection inlet 7. Both the slaked lime injection inlet 6 and the activated carbon injection inlet 7 are connected to a spray pipe located inside the elbow 5. Each spray pipe is provided with multiple nozzles. The slaked lime and activated carbon are sprayed from multiple points, which can be evenly sprayed into the flue and avoid ash blockage.

[0019] The elbow 5 is an arc-shaped elbow, and the bottom of the arc is provided with a ash discharge pipe 8. The ash discharge pipe 8 is provided with a slide valve 9 to facilitate the discharge of accumulated ash at the elbow 5.

[0020] The elbow 5 has several back-blowing ports 10 at its arc-shaped bottom. The back-blowing ports 10 are connected to the back-blowing air supply pipe 11. The back-blowing air supply pipe 11 is equipped with a gate valve 12 to clean up the accumulated dust and reduce the blockage of the smoke outlet 2.

[0021] The elbow 5 is provided with a wear-resistant layer.

[0022] A manhole 13 is provided on one side of the input end of the elbow 5.

[0023] The front end of the flue gas outlet 2 is provided with a fixed inner ring 14, the outer ring of the fixed inner ring 14 is provided with a rubber ring 15, the outer ring of the rubber ring 15 is provided with a fixed outer ring 16, the fixed outer ring 16 is provided with a guide inclined plate 17 fixed on the deacidification tower body, and the guide inclined plate 17 is provided with a through hole 110 located inside the fixed outer ring 16.

[0024] The fixed inner ring 14 is provided with an inner retaining ring 18 located inside the rubber ring 15, and the fixed outer ring 16 is provided with an outer retaining ring 19 located outside the rubber ring 15. The outer diameter of the outer retaining ring 19 is larger than the inner diameter of the inner retaining ring 18.

[0025] The working process of this utility model: This utility model discloses an anti-clogging outlet flue for a desulfurization tower. During operation, the outlet 2 is connected to the contraction section of the Venturi section 1 via an expansion joint 3, increasing the Venturi section 1 and preventing blockage of the straight inlet flue under low load. The diffusion section of the Venturi achieves a turbulent flow effect, which is more conducive to the absorption of pollutants by the injected quicklime and activated carbon, thereby improving the desulfurization efficiency and heavy metal removal efficiency. A vibrator 4 is installed on the outlet 2, which drives the outlet 2 to vibrate, reducing the blockage phenomenon of the outlet 2. The lower sidewall of the outlet 2 is inclined with a lower front and higher rear, which is conducive to the return of large ash particles shaken off to the tower. This application can meet the operating conditions of 30~110% flue gas load and will not cause blockage during long-term operation.

[0026] Increase the flue gas velocity to 18 m / s and add a Venturi section to avoid blockage of the straight flue at low loads. While increasing the velocity, wear is also taken into consideration. The Venturi section is made of Q345 material and the elbow 5 is equipped with a wear-resistant layer.

[0027] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A desulfurization tower anti-clogging outlet flue, characterized in that: It includes a venturi section (1), a smoke outlet (2), an expansion joint (3) and a vibrator (4). The smoke outlet (2) is connected to the contraction section of the venturi section (1) through the expansion joint (3). The smoke outlet (2) is equipped with a vibrator (4). The lower side wall of the smoke outlet (2) is inclined with the front lower and the back higher. The diffuser end of the venturi section (1) is provided with an elbow (5).

2. The anti-clogging outlet flue of a deacidification tower as described in claim 1, characterized in that: The elbow (5) has a lime spray inlet (6) and an activated carbon spray inlet (7) connected to its input end. The lime spray inlet (6) is located in front of the activated carbon spray inlet (7). Both the lime spray inlet (6) and the activated carbon spray inlet (7) are connected to a spray pipe located inside the elbow (5). Each spray pipe is equipped with multiple nozzles.

3. The anti-clogging outlet flue of a deacidification tower as described in claim 1, characterized in that: The elbow (5) is an arc-shaped elbow, and the bottom of the elbow (5) is provided with a lower ash pipe (8), and the lower ash pipe (8) is provided with a slide valve (9).

4. The anti-clogging outlet flue of a deacidification tower as described in claim 3, characterized in that: The elbow (5) has several backflush ports (10) at its arc-shaped bottom. The backflush ports (10) are connected to the backflush air supply pipe (11), and the backflush air supply pipe (11) is equipped with a gate valve (12).

5. The anti-clogging outlet flue of a deacidification tower as described in claim 1, characterized in that: The elbow (5) is provided with a wear-resistant layer.

6. The anti-clogging outlet flue of a deacidification tower as described in claim 1, characterized in that: A manhole (13) is provided on one side of the input end of the elbow (5).

7. The anti-clogging outlet flue of a deacidification tower as described in claim 1, characterized in that: The front end of the flue gas outlet (2) is provided with a fixed inner ring (14), the outer ring of the fixed inner ring (14) is provided with a rubber ring (15), the outer ring of the rubber ring (15) is provided with a fixed outer ring (16), the fixed outer ring (16) is provided with a guide plate (17) fixed on the deacidification tower body, and the guide plate (17) is provided with a through hole (110) located in the fixed outer ring (16).

8. The anti-clogging outlet flue of a deacidification tower as described in claim 7, characterized in that: The fixed inner ring (14) is provided with an inner retaining ring (18) located inside the rubber ring (15), and the fixed outer ring (16) is provided with an outer retaining ring (19) located outside the rubber ring (15). The inner diameter of the outer retaining ring (19) is smaller than the outer diameter of the inner retaining ring (18).

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