Gas-liquid separation device at flue inlet of desulfurizing absorption tower

Abstract

The utility model discloses a gas-liquid separation device at the flue inlet of desulfurizing absorption tower, wherein the inner wall of the absorption tower is communicated with a flue, the gas-liquid separation device comprises an arc-shaped plate and at least two triangular supporting pieces, the near end of the arc-shaped plate is welded above a flue opening of the inner wall of the absorption tower, and sawteeth are arranged at the far end of the arc-shaped plate. The length of the arc-shaped plate is larger than that of the flue opening. And the inclined edge of the triangular supporting piece is welded with the lower surface of the arc-shaped plate. According to the utility model, the direct scouring of sprayed slurry to the flue opening of the absorption tower is avoided, the slurry is prevented from flowing back to the flue along the upper top plate of the original flue, the formation and accumulation of gypsum deposits on a dry and wet interface are effectively reduced, and the safe and stable operation of a desulfurization system is ensured; meanwhile, due to the design and installation of the gas-liquid separation device, escape of the flue gas along the wall of the absorption tower is reduced, and due to the zigzag design, the flue gas and slurry are more fully contacted in the space section, so that the desulfurization efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the field of desulfurization absorption towers, in particular to a gas-liquid separation device at a flue inlet of a desulfurization absorption tower. Background Art

[0002] Coal-fired power plants that use the limestone-gypsum wet flue gas desulfurization process are equipped with a desulfurization absorption tower. The limestone slurry is pumped from the slurry pool at the bottom of the absorption tower to the slurry spray layer at the top of the absorption tower through a slurry circulation pump, and sprayed downward using a nozzle. The original flue gas enters the absorption tower from the inlet on the side below the desulfurization absorption tower spray layer and then contacts and reacts with the spray slurry in countercurrent upward, thereby removing sulfur dioxide from the flue gas. The junction of the original flue gas flue and the absorption tower is the junction surface of the dry flue gas and the wet slurry. The environment is extremely harsh, and it is very easy to cause slurry and flue gas leakage and sediment accumulation due to erosion, wear and corrosion, which seriously affects the safe and stable operation of the desulfurization system. Utility Model Content

[0003] The utility model aims to provide a gas-liquid separation device at the flue inlet of a desulfurization absorption tower, so as to prevent the spraying slurry from directly scouring the absorption tower and the dry-wet joint surface of the flue, and improve its operating environment.

[0004] The technical solution of the utility model is:

[0005] A gas-liquid separation device at the flue inlet of a desulfurization absorption tower, wherein the inner wall of the absorption tower is connected to the flue, and the gas-liquid separation device comprises an arc plate, the proximal end of which is welded above the flue opening of the inner wall of the absorption tower, and the distal end of the arc plate is provided with saw teeth.

[0006] Preferably, the length of the arc-shaped plate is greater than the length of the flue opening.

[0007] Preferably, it also includes at least two triangular support members, the side edges of the triangular support members are welded to the inner wall of the absorption tower, and the oblique edges are welded to the lower surface of the arc plate.

[0008] Preferably, the inclination angle of the hypotenuse of the triangular support member is consistent with the inlet angle of the flue.

[0009] Preferably, an anti-corrosion layer is provided on the surface of the welding points between the triangular support, the absorption tower and the arc-shaped plate.

[0010] The advantages of the utility model are:

[0011] The gas-liquid separation device at the flue inlet of the desulfurization absorption tower proposed by the utility model avoids the direct scouring of the flue outlet of the absorption tower by the spraying slurry, prevents the slurry from flowing back to the flue along the top plate of the original flue, effectively reduces the formation and accumulation of gypsum deposits at the dry-wet interface, and ensures the safe and stable operation of the desulfurization system; at the same time, the design and installation of the gas-liquid separation device also reduces the escape of flue gas along the wall of the absorption tower, and the zigzag design makes the contact between the flue gas and the slurry in this space section more complete, further improving the desulfurization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0013] Figure 1 This is a schematic diagram of the interface between the desulfurization absorption tower and the original flue;

[0014] Figure 2 It is a schematic diagram of a curved plate of a gas-liquid separation device;

[0015] Figure 3 It is a schematic diagram of a support member of a gas-liquid separation device;

[0016] Figure 4 This is a schematic diagram of the installation structure of the gas-liquid separation device. DETAILED DESCRIPTION

[0017] The utility model provides a gas-liquid separation device at the flue inlet of a desulfurization absorption tower, which prevents spraying slurry from directly scouring the absorption tower and the dry-wet joint surface of the flue, thereby improving the operating environment thereof.

[0018] like Figure 1 As shown, the existing flue inlet structure of the desulfurization absorption tower is shown, wherein the inner wall of the absorption tower 1 is connected to the flue 2, and the flue 2 inlet has a downward inlet angle.

[0019] like Figure 2-4 As shown, the gas-liquid separation device proposed in the utility model includes an arc plate 3 and at least two triangular support members 4. The proximal end of the arc plate is welded above the flue outlet of the inner wall of the absorption tower, and the distal end of the arc plate is provided with saw teeth 31. The overall length of the arc plate 3 is slightly greater than the length of the flue outlet. The side of the triangular support member 4 is welded to the inner wall of the absorption tower, and the hypotenuse is welded to the lower surface of the arc plate to increase the stability of the arc plate 3. The hypotenuse angle of the triangular support member is consistent with the inlet angle of the flue.

[0020] During the specific installation, the gas-liquid separation device is made in a split type according to the on-site construction environment. The anti-corrosion layer at the installation position on the upper edge of the absorption tower flue inlet is removed, and the arc plate and support parts of the gas-liquid separation device are welded and installed in sequence. There are two support parts 4 under one arc plate 3. After the welding and installation are completed, the anti-corrosion layer is set for anti-corrosion treatment.

[0021] The gas-liquid separation device was installed in the desulfurization absorption tower of a certain unit. It was designed based on the absorption tower diameter of 15.5 meters and the original inlet flue of 11.62*5.39 meters. The overall length is slightly longer than the original flue, and the inclination angle is consistent with the original flue, both 15°, and the width is about 0.6 meters. After installation, it was observed through the manhole door that the original flue was almost not directly washed by the slurry, and the desulfurization efficiency was also improved to a certain extent compared with before. The dry-wet interface sediment was also found to be greatly reduced during the maintenance period.

[0022] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any modifications made according to the spirit of the main technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. A gas-liquid separation device at the flue inlet of a desulfurization absorption tower, wherein the inner wall of the absorption tower is connected to the flue, characterized in that: The gas-liquid separation device comprises an arc-shaped plate, the proximal end of which is welded above the flue opening of the inner wall of the absorption tower, and the distal end of the arc-shaped plate is provided with saw teeth.

2. The gas-liquid separation device at the flue inlet of the desulfurization absorption tower according to claim 1 is characterized in that: The length of the arc plate is greater than the length of the flue opening.

3. The gas-liquid separation device at the flue inlet of the desulfurization absorption tower according to claim 1 is characterized in that: It also includes at least two triangular support members, the side edges of the triangular support members are welded to the inner wall of the absorption tower, and the oblique edges are welded to the lower surface of the arc plate.

4. The gas-liquid separation device at the flue inlet of the desulfurization absorption tower according to claim 3 is characterized in that: The inclination angle of the hypotenuse of the triangular support member is consistent with the inlet angle of the flue.

5. The gas-liquid separation device at the flue inlet of the desulfurization absorption tower according to claim 3, characterized in that: An anti-corrosion layer is provided on the surface of the welding points between the triangular support, the absorption tower and the arc-shaped plate.

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