Super-corrosion-resistant flue gas desulfurization and dust removal tower

Abstract

The utility model relates to flue gas desulfurization dust removal technical field, and its in order to solve the existing flue gas desulfurization dust removal tower, tower body corrosion resistance gradually reduces, shortens the service life problem, the utility model provides a kind of super strong corrosion-resistant flue gas desulfurization dust removal tower, including tower body, air inlet pipe, spraying assembly, protective cylinder body;The middle section of the tower body is equipped in the protective cylinder body;The spraying assembly is worn in the tower body;The spraying end of the spraying assembly is from the top side portion of the protective cylinder body and extends to the bottom of the protective cylinder body;The air inlet pipe is worn in the tower body and is worn into the bottom inner cavity of the protective cylinder body;The utility model uses protective cylinder body as the lining of tower body, its partial spraying section is equipped in the tower body, can effectively buffer after spraying assembly sprays the corrosive slurry with certain mechanical scouring intensity, to avoid the scouring damage of anticorrosive coating of tower body inner wall, improve the service life of tower body, also convenient to disassemble and replace protective cylinder body.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization and dust removal technology, specifically to a super corrosion-resistant flue gas desulfurization and dust removal tower. Background Technology

[0002] With the continuous improvement of environmental protection standards, coal-fired power plants, steel, chemical and other industries have increasingly strict requirements for flue gas desulfurization and dust removal equipment. For example, in the production process of fiberglass, there are links involving resin curing, raw material heating or combustion, which will generate flue gas containing sulfur and dust, which needs to be treated before it can be discharged. Existing desulfurization and dust removal towers usually include several core structures such as spray system, packing layer, demister and anti-corrosion lining.

[0003] For example, the patent with announcement number CN205019916U discloses a tower body, a spray layer, and a demister layer above the spray layer. The anti-corrosion lining often uses a glass flake coating. However, since the spray system mainly sprays corrosive slurries, such as limestone-gypsum slurry and ammonia slurry, which are the core media for desulfurization, and the atomization effect of the spray system (droplet size, velocity, and distribution) determines the mechanical erosion intensity of the droplets on the coating, especially since the existing technology also uses a dual-circulation turbulent venturi structure to improve desulfurization efficiency, that is, through two-stage circulating slurry contact with the flue gas at high speed, the coating damage is further aggravated, resulting in a gradual decrease in the corrosion resistance of the tower body and a shortened service life.

[0004] Based on the above description, there is an urgent need for an ultra-corrosion-resistant flue gas desulfurization and dust removal tower that can withstand a certain mechanical erosion intensity. Utility Model Content

[0005] The purpose of this utility model is to provide an ultra-corrosion resistant flue gas desulfurization and dust removal tower, which aims to solve the technical problem that the spraying system of existing flue gas desulfurization and dust removal towers will gradually damage the anti-corrosion coating inside the tower body after continuously spraying corrosive slurry with a certain mechanical scouring intensity, eventually leading to a gradual decrease in the corrosion resistance of the tower body and a shortened service life.

[0006] The embodiments of this utility model are achieved through the following technical solutions:

[0007] A highly corrosion-resistant flue gas desulfurization and dust removal tower includes a tower body, an air inlet pipe, a spray assembly, and a protective cylinder. The protective cylinder is located in the middle section of the tower body. The spray assembly passes through the tower body. The spraying end of the spray assembly enters from the top side of the protective cylinder and extends to the bottom of the protective cylinder. The air inlet pipe passes through the tower body and enters the bottom cavity of the protective cylinder.

[0008] Preferably, the protective cylinder is fixed to the spray section of the tower body via an annular groove seat.

[0009] Preferably, the system also includes a filter assembly embedded in the tower body; the annular groove extends radially toward the center of the protective cylinder and has an annular support plate for receiving the filter assembly; the filter assembly is located at the bottom of the air inlet pipe; and the spray assembly is located at the top of the filter assembly.

[0010] Preferably, the filter assembly includes a filter basket and a filter layer; the filter basket is mounted on one end of the annular plate near the air inlet pipe; the filter layer is filled inside the filter basket; and the spray assembly is located on top of the liquid inlet end of the filter basket.

[0011] Preferably, the annular plate is provided with multiple positioning grooves at intervals; the top of the filter basket is located on the outer edge plate; the outer edge plate is attached to the annular plate and is provided with multiple positioning elements embedded in the multiple positioning grooves.

[0012] Preferably, the spray assembly includes multiple inverted L-shaped bends and multiple spray heads disposed on the inverted L-shaped bends; the multiple spray heads are spaced apart on the vertical pipe sections of the inverted L-shaped bends; the vertical pipe sections of the inverted L-shaped bends penetrate the protective cylinder and extend towards the filter layer.

[0013] Preferably, the horizontal section of the inverted L-shaped bend passes through the side wall of the tower body and is provided with a reinforcing sleeve.

[0014] Preferably, one end of the reinforcing sleeve passes through the side wall of the tower body and is connected to the side wall of the tower body via a flange.

[0015] Preferably, the vertical section of the inverted L-shaped bend extends toward the filter basket and leaves a slow-liquid chamber between it and the liquid inlet end of the filter basket; the air inlet pipe passes through the side wall of the tower body and the protective cylinder in sequence and communicates with the slow-liquid chamber.

[0016] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0017] This invention uses a protective cylinder as the inner lining of the tower body, partially located in the spray section of the tower body, with the spray end of the spray assembly completely inside the protective cylinder. This effectively buffers the corrosive slurry with a certain mechanical erosion intensity sprayed by the spray assembly, thus preventing erosion and damage to the anti-corrosion coating on the inner wall of the tower body, thereby improving the service life of the tower body. Moreover, since it is only partially installed, it does not occupy too much effective space inside the tower body, and it is also easy to disassemble and replace the protective cylinder. Compared with tower body maintenance and recoating the anti-corrosion coating inside the tower body, it is easier to control and operate. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 for Figure 1 Enlarged schematic diagram of local structure A in the middle;

[0020] Figure 3 This is a schematic diagram showing the connection between the annular groove seat and the annular mounting plate in this utility model.

[0021] Icons: 1-Tower body, 11-Spray section, 12-Slow liquid chamber, 2-Air inlet pipe, 3-Spray assembly, 31-Inverted L-shaped bend, 32-Spray head, 4-Protective cylinder, 5-Annular groove seat, 6-Filter assembly, 61-Filter basket, 62-Filter layer, 8-Annular plate, 9-Reinforcing sleeve, 10-Flange. Detailed Implementation

[0022] The specific implementation method is described below with reference to the accompanying drawings.

[0023] Example 1

[0024] Please see Figures 1 to 3 This utility model provides the following technical solution: an ultra-corrosion resistant flue gas desulfurization and dust removal tower, which is suitable for situations where corrosive slurry is used for spray desulfurization.

[0025] Specifically, such as Figure 1 and Figure 2 As shown, a super corrosion-resistant flue gas desulfurization and dust removal tower includes a tower body 1, an air inlet pipe 2, a spray assembly 3, and a protective cylinder 4; the protective cylinder 4 is located in the middle section of the tower body 1; the spray assembly 3 passes through the tower body 1; the spray end of the spray assembly 3 enters from the top side of the protective cylinder 4 and extends to the bottom of the protective cylinder 4; the air inlet pipe 2 passes through the tower body 1 and enters the bottom cavity of the protective cylinder 4.

[0026] In this embodiment, the protective cylinder 4 serves as the inner lining of the tower body 1. It is partially located in the spray section of the tower body 1, and the spray end of the spray assembly 3 is completely located inside the protective cylinder 4. This effectively buffers the corrosive slurry with a certain mechanical erosion intensity sprayed by the spray assembly 3, thereby preventing the anti-corrosion coating on the inner wall of the tower body 1 from being eroded and damaged. This improves the service life of the tower body 1. Moreover, since it is only partially installed, it does not occupy too much effective space inside the tower body 1. It is also easy to disassemble and replace the protective cylinder 4. Compared with the maintenance of the tower body 1 and the recoating of the anti-corrosion coating inside the tower body 1, it is easier to control and operate.

[0027] In this embodiment, the protective cylinder 4 is made of commonly used corrosion-resistant materials such as ceramics, Hastelloy C276, and nickel-based alloys, and the corresponding thickness is selected according to the size of the application tower 1 and the impact strength of the spray assembly 3.

[0028] Specifically, such as Figure 1 and Figure 3 As shown, the protective cylinder 4 is fixed to the spray section 11 of the tower body 1 by the annular groove seat 5.

[0029] In this embodiment, the annular groove seat 5 and the inner side wall of the tower body 1 together form an annular limiting groove, and the bottom end of the protective cylinder 4 is embedded in the limiting groove, so as to not only limit the protective cylinder 4, but also facilitate disassembly and replacement.

[0030] Specifically, such as Figure 1 and Figure 3 As shown, it also includes a filter assembly 6 internally disposed in the tower body 1; an annular groove seat 5 extends radially toward the center of the protective cylinder 4 and has an annular mounting plate 8 for receiving the filter assembly 6; the filter assembly 6 is disposed at the bottom of the air inlet pipe 2; and a spray assembly 3 is disposed at the top of the filter assembly 6. The filter assembly 6 includes a filter basket 61 and a filter layer 62; the filter basket 61 is mounted on the annular mounting plate 8 near the end of the air inlet pipe 2; the filter layer 62 is filled inside the filter basket 61; and the spray assembly 3 is disposed at the top of the liquid inlet end of the filter basket 61.

[0031] In this embodiment, the filter basket 61 is provided with filter holes throughout, and the filter layer 62 inside is filled with filter holes for precision filtration, so that it can be accumulated at the bottom of the tower body 1. Then, through the liquid extraction pipe connected to the bottom of the tower body 1 and further combined with the circulation pump, the slurry accumulated at the bottom of the tower body 1 is circulated into the spray assembly 3 for recycling. In order to facilitate the replacement and filling of the filter layer 62, the liquid inlet end of the top of the filter basket 61 is open and further clamped with a cover with filter holes. This facilitates the disassembly and replacement of the filter layer 62, and also makes it easy to limit the filter layer 62 to prevent the filter layer 62 from floating out of the filter basket 61 during the desulfurization process. Furthermore, by setting the filter hole diameter of the filter basket 61 and the cover differently, multi-stage gradient filtration can be achieved to facilitate the recycling of the slurry.

[0032] In this embodiment, the filter layer 62 can be flexibly selected according to the composition of the flue gas being treated, the corrosiveness of the desulfurization slurry, and the temperature during desulfurization in the tower 1, such as silicon carbide (SiC) particles / honeycomb, silicon nitride (Si3N4) porous ceramics, etc.

[0033] Specifically, such as Figure 1 and Figure 3 As shown, the annular plate 8 is provided with multiple positioning grooves at intervals; the top of the filter basket 61 is located on the outer edge plate; the outer edge plate is attached to the annular plate 8 and is provided with multiple positioning parts 9 embedded in the multiple positioning grooves.

[0034] In this embodiment, the positioning element 9 is a positioning post or a positioning protrusion.

[0035] Specifically, such as Figure 1 and Figure 2As shown, the spray assembly 3 includes multiple inverted L-shaped bends 31 and multiple spray heads 32 disposed on the inverted L-shaped bends 31; the multiple spray heads 32 are spaced apart on the vertical pipe sections of the inverted L-shaped bends 31; the vertical pipe sections of the inverted L-shaped bends 31 penetrate into the protective cylinder 4 and extend towards the filter layer 62.

[0036] In this embodiment, the filtered slurry accumulated at the bottom of the tower body 1 is pumped out by a circulation pump and sent to each inverted L-shaped bend 31. It is sprayed out through multiple spray nozzles 32 spaced apart on the inverted L-shaped bend 31 to form water mist, which fully desulfurizes the flue gas sent in by the air inlet pipe 2.

[0037] Specifically, such as Figure 2 As shown, the horizontal section of the inverted L-shaped bend 31 passes through the side wall of the tower body 1 and is provided with a reinforcing sleeve 9. One end of the reinforcing sleeve 9 passes through the side wall of the tower body 1 and is connected to the side wall of the tower body 1 through a pair of flanges 10.

[0038] In this embodiment, the mechanical strength of the horizontal pipe section of the inverted L-shaped bend 31 can be ensured by the reinforcing sleeve 9, thus ensuring its stability during liquid spraying.

[0039] Specifically, such as Figure 1 As shown, the vertical section of the inverted L-shaped bend 31 extends toward the filter basket 61 and leaves a slow liquid chamber 12 between it and the liquid inlet end of the filter basket 61; the air inlet pipe 2 passes through the side wall of the tower body 1 and the protective cylinder 4 in sequence and is connected to the slow liquid chamber 12.

[0040] In this embodiment, since the internal structure of the tower body 1 is equipped with a filter assembly 6, a stagnant flow phenomenon will occur. That is, the stagnant flow will buffer the accumulated liquid in the slow liquid chamber 12, and the accumulated liquid will be used as the dust removal washing liquid for the flue gas. After the flue gas enters the tower body 1, it first passes through the slow liquid chamber 12, where the dust it carries is blocked and left behind. The gas continues to move towards the top of the tower body 1, and then undergoes desulfurization through the spray assembly 3. Finally, it is discharged after being treated by the demister at the top of the tower.

Claims

1. A highly corrosion-resistant flue gas desulfurization and dust removal tower, comprising a tower body (1), an inlet pipe (2), and a spray assembly (3), characterized in that: It also includes a protective cylinder (4); the protective cylinder (4) is located in the middle section of the tower body (1); the spray assembly (3) passes through the tower body (1); the spray end of the spray assembly (3) passes through the top side of the protective cylinder (4) and extends to the bottom of the protective cylinder (4); the air inlet pipe (2) passes through the tower body (1) and enters the bottom cavity of the protective cylinder (4).

2. The ultra-corrosion-resistant flue gas desulfurization and dust removal tower according to claim 1, characterized in that: The protective cylinder (4) is fixed to the spray section (11) of the tower body (1) by an annular groove seat (5).

3. The ultra-corrosion-resistant flue gas desulfurization and dust removal tower according to claim 2, characterized in that: It also includes a filter assembly (6) internally disposed in the tower body (1); the annular groove seat (5) extends radially toward the center of the protective cylinder (4) and has an annular support plate (8) for receiving the filter assembly (6); the filter assembly (6) is disposed at the bottom of the air inlet pipe (2); the spray assembly (3) is disposed at the top of the filter assembly (6).

4. The ultra-corrosion-resistant flue gas desulfurization and dust removal tower according to claim 3, characterized in that: The filter assembly (6) includes a filter basket (61) and a filter layer (62); the filter basket (61) is mounted on the annular plate (8) at one end near the air inlet pipe (2); the filter layer (62) is filled inside the filter basket (61); the spray assembly (3) is located at the top of the liquid inlet end of the filter basket (61).

5. The ultra-corrosion-resistant flue gas desulfurization and dust removal tower according to claim 4, characterized in that: The annular plate (8) is provided with multiple positioning grooves at intervals; the top of the filter basket (61) is located on the outer edge plate; the outer edge plate is attached to the annular plate (8) and is provided with multiple positioning elements embedded in the multiple positioning grooves.

6. The ultra-corrosion-resistant flue gas desulfurization and dust removal tower according to claim 4 or 5, characterized in that: The spray assembly (3) includes multiple inverted L-shaped bends (31) and multiple spray heads (32) disposed on the inverted L-shaped bends (31); the multiple spray heads (32) are spaced apart on the vertical pipe section of the inverted L-shaped bends (31); the vertical pipe section of the inverted L-shaped bends (31) passes through the protective cylinder (4) and extends toward the filter layer (62).

7. The ultra-corrosion-resistant flue gas desulfurization and dust removal tower according to claim 6, characterized in that: The horizontal section of the inverted L-shaped bend (31) passes through the side wall of the tower body (1) and is provided with a reinforcing sleeve (9).

8. The ultra-corrosion-resistant flue gas desulfurization and dust removal tower according to claim 7, characterized in that: One end of the reinforcing sleeve (9) passes through the side wall of the tower body (1) and is connected to the side wall of the tower body (1) through a flange (10).

9. The ultra-corrosion-resistant flue gas desulfurization and dust removal tower according to claim 6, characterized in that: The vertical section of the inverted L-shaped bend (31) extends toward the filter basket (61) and leaves a slow-liquid chamber (12) between it and the liquid inlet end of the filter basket (61); the air inlet pipe (2) passes through the side wall of the tower body (1) and the protective cylinder (4) in sequence and communicates with the slow-liquid chamber (12).

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