Desulfurizing tower inner wall anti-corrosion device

Abstract

The utility model discloses an anti-corrosion device for the inner wall of a desulfurizing tower. The anti-corrosion device comprises a base, a shell, an inner barrel, an anode block, a wire coil and a rectifier, an annular insulating seat is arranged on the base, a plurality of anode blocks are arranged in the insulating seat, mounting holes are formed in the periphery of the insulating seat, mounting rods are arranged on the base of the inner barrel, the inner barrel is fixed in the mounting holes through the mounting rods, and a plurality of grooves corresponding to the anode blocks are formed in the bottom of the inner barrel; the outer shell is vertically welded to the edge of the outer side of the base. Anticorrosion treatment is carried out on the inner wall of the desulfurizing tower through a cathode protection method of sacrificial anodes and a cathode protection method of impressed current, two kinds of metal with different activities are connected, namely, the outer side of an inner barrel is sleeved with a sleeve made of magnesium alloy, the sleeve is connected with a wire coil, and the magnesium alloy sleeve with the high activity loses electrons and is corroded; and the inner barrel wall with poor activity obtains electrons, so that the inner barrel wall is protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline anti-corrosion, and particularly relates to an anti-corrosion device for the inner wall of a desulfurization tower. Background Art

[0002] A desulfurization tower is a tower-type device for desulfurizing industrial waste gas, which is used to reduce the emission of sulfur dioxide in industrial waste gas, thereby reducing environmental pollution. The desulfurization tower converts sulfides such as sulfur dioxide in the waste gas into sulfates by adding absorbents (such as limestone, soda ash, etc.) to achieve the purpose of desulfurization. This process mainly occurs through chemical reactions, which can effectively reduce the sulfur dioxide content in the flue gas and protect air quality and human health.

[0003] However, the generated sulfate substances are corrosive. The sulfates are deposited in the oxidation zone at the bottom of the tower, which is likely to corrode the inner wall at this position. Over time, it is easy to cause leakage and damage of the desulfurization tower. Most of the existing anti-corrosion methods use a layer of anti-corrosion glue coated on the inner wall. Since the substances in the oxidation zone are highly acidic, the anti-corrosion glue cannot effectively prevent corrosion of the inner wall. Therefore, a device is needed to solve the above problems. Summary of the Utility Model

[0004] In order to overcome the problems in the background art, the utility model provides an anti-corrosion device for the inner wall of a desulfurization tower.

[0005] To achieve the above object, the utility model is realized by the following technical solutions:

[0006] An anti-corrosion device for the inner wall of a desulfurization tower includes: a base, a housing, an inner barrel, anode blocks, a guide coil, and a rectifier; a circular insulating seat is provided on the base, and several anode blocks are arranged inside the insulating seat. Installation holes are formed on the periphery of the insulating seat. An installation rod is provided at the base of the inner barrel, and the inner barrel is fixed to the installation holes through the installation rod. Several grooves are formed at the bottom of the inner barrel corresponding to the anode blocks. The housing is perpendicularly welded to the outer edge position of the base;

[0007] Among them, when the inner barrel is fixed to the base, the anode blocks are exactly inserted into the grooves. A rectifier is provided at the lower end of the base. The positive pole of the rectifier is connected to the anode blocks. A disc-shaped wire is provided outside the insulating seat, and the disc-shaped wire is connected to the negative pole of the rectifier;

[0008] A sleeve is provided outside the inner barrel, and the sleeve is closely attached to the outer wall of the inner barrel. The guide coil is arranged outside the sleeve. There is a gap between the guide coil and the sleeve. The top and bottom of the guide coil are respectively connected to the top and bottom of the sleeve.

[0009] Furthermore, the anode blocks are made of graphite anode materials and are in a cylindrical structure.

[0010] Further, the sleeve is made of magnesium alloy material.

[0011] Further, an insulating cylinder is provided in the middle gap between the outer shell and the coil, and the insulating cylinder is made of neoprene material.

[0012] Further, the insulating seat is made of alumina ceramic.

[0013] Advantages of the present utility model:

[0014] The present utility model mainly uses the sacrificial anode cathodic protection method and the impressed current cathodic protection method to perform anti-corrosion treatment on the inner wall of the desulfurization tower. The inner wall of the desulfurization tower is corroded mainly because the substances on the inner wall react chemically with the acidic solution in the oxidation zone, causing the anions on the inner wall to be lost. Over time, it will be corroded.

[0015] For the bottom, the impressed current cathodic protection method is used to protect the cathode of the desulfurization tower. The rectifier provides current to the anode block to change the potential of the surrounding environment, so that the potential of the bottom of the inner barrel is always lower than that of the surrounding environment, thus becoming the cathode in the whole environment. In this way, the bottom of the desulfurization tower will not be corroded due to the loss of electrons.

[0016] For the side wall, the sacrificial anode cathodic protection method is used to perform anti-corrosion treatment on the side wall of the desulfurization tower. By connecting two metals with different activities, that is, by sleeving a magnesium alloy-made sleeve on the outside of the inner barrel and connecting it to the coil, the magnesium alloy sleeve with strong activity loses electrons and is corroded, while the inner barrel wall with poor activity gains electrons and is thus protected. In this process, the magnesium alloy sleeve with strong activity is corroded, but it can be replaced, effectively avoiding the corrosion of the inner barrel wall in the oxidation zone. Description of the drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a schematic diagram of the internal structure of the device of the present utility model;

[0019] Figure 2 is a front cross-sectional view of the device of the present utility model;

[0020] Figure 3 is the Figure 2 partial enlarged view at A in the present utility model;

[0021] Figure 4 It is a schematic structural view of the base of the present utility model;

[0022] Figure 5 It is a schematic structural view of the bottom of the inner barrel of the present utility model;

[0023] Figure 6 It is an explosion schematic view of the device of the present utility model;

[0024] Figure 7 It is a schematic diagram of the anti-corrosion principle of the side wall of the inner barrel of the present utility model;

[0025] Figure 8 It is a schematic diagram of the anti-corrosion principle of the bottom of the inner barrel of the present utility model;

[0026] 1 - Base, 11 - Insulating base, 12 - Disk-shaped wire, 13 - Mounting hole, 2 - Outer shell, 3 - Inner barrel, 31 - Mounting rod, 32 - Groove, 4 - Anode block, 5 - Induction coil, 6 - Rectifier, 7 - Sleeve, 8 - Insulating cylinder. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] Refer to Figures 1 to 8 , the present utility model discloses an anti-corrosion device for the inner wall of a desulfurization tower, including: a base 1, an outer shell 2, an inner barrel 3, an anode block 4, an induction coil 5, and a rectifier 6; a ring-shaped insulating base 11 is provided on the base 1, and a plurality of anode blocks 4 are arranged in the insulating base 11. Mounting holes 13 are formed on the periphery of the insulating base 11. A mounting rod 31 is provided at the base of the inner barrel 3, and the inner barrel 3 is fixed to the mounting holes 13 through the mounting rod 31. A plurality of grooves 32 corresponding to the anode blocks 4 are formed at the bottom of the inner barrel 3. The outer shell 2 is vertically welded at the outer edge position of the base 1;

[0029] It should be noted that, as shown in Figures 2 to 6 , the inner barrel 3 is the oxidation area of the original desulfurization tower, and contains various acidic solutions such as sulfuric acid inside, which has strong corrosiveness. The base 1 is fixed to the mounting holes 13 through the mounting rod 31, so that the anode block 4 can also be placed in the groove 32, enabling the externally applied current to enter the bottom of the inner barrel 3. The provided insulating base 11 can prevent the interference between the two anti-corrosion methods, separate the bottom and side wall of the inner barrel 3 for anti-corrosion, improve the anti-corrosion effect, and make it easier to protect the inner barrel 3.

[0030] Among them, when the inner barrel 3 is fixed to the base 1, the anode block 4 is exactly inserted into the groove 32. A rectifier 6 is provided at the lower end of the base 1. The positive pole of the rectifier 6 is connected to the anode block 4. A disc-shaped wire 12 is provided outside the insulating seat 11, and the disc-shaped wire 12 is connected to the negative pole of the rectifier 6;

[0031] In this embodiment, the anode block 4 is made of graphite anode material and has a cylindrical structure.

[0032] In this embodiment, the insulating seat 11 is made of alumina ceramic.

[0033] It should be noted that referring to Figure 2 、 Figure 3 、 Figure 5 、 Figure 8 As shown, the bottom of the inner barrel 3 is mainly subjected to anticorrosion treatment by the impressed current cathodic protection method. The rectifier 6 provides current to the anode block 4 to change the potential of the surrounding environment, so that the potential of the bottom of the inner barrel 3 is always in a state lower than that of the surrounding environment, thus becoming the cathode in the whole environment. In this way, the bottom of the desulfurization tower will not be corroded due to losing electrons. The disc-shaped wire 12 forms a closed loop for the whole system, enabling the current to flow from the anode block 4 to the bottom of the inner barrel 3, and then back to the rectifier 6 from the disc-shaped wire 12. The rectifier 6 can convert alternating current into direct current, enabling the current to flow between conductors. The anode block 4 is made of graphite because when current passes through graphite, it does not dissolve itself but only undergoes anodic oxidation reactions. The insulating seat 11 is made of alumina ceramic mainly because alumina ceramic is very hard and has good insulation, and it can also play a supporting role when placed at the bottom of the inner barrel 3.

[0034] A sleeve 7 is provided outside the inner barrel 3, and the sleeve 7 is closely attached to the outer wall of the inner barrel 3. A coil 5 is provided outside the sleeve 7, and there is a gap between the coil 5 and the sleeve 7. The top and bottom of the coil 5 are respectively connected to the top and bottom of the sleeve 7.

[0035] In this embodiment, the sleeve 7 is made of magnesium alloy material.

[0036] In this embodiment, an insulating cylinder 8 is provided in the middle gap between the outer shell 2 and the coil 5, and the insulating cylinder 8 is made of neoprene material.

[0037] It should be noted that referring to Figure 1 、 Figure 6 、 Figure 7As shown, for the side wall, the sacrificial anode cathodic protection method is used to prevent corrosion of the side wall of the desulfurization tower. By connecting two metals with different activities, that is, sleeving a magnesium alloy sleeve 7 outside the outer barrel 3 and connecting a conducting coil 5. The magnesium alloy sleeve 7 with strong activity loses electrons and is corroded, while the wall of the inner barrel 3 with poor activity gains electrons and is thus protected. In this process, the magnesium alloy sleeve 7 with strong activity is corroded, but it can be replaced, effectively avoiding the corrosion of the inner barrel wall in the oxidation zone. The insulating cylinder 8 arranged outside the conducting coil 5 can prevent the outer shell 2 from interfering with the whole system. By corroding the magnesium alloy sleeve 7 to protect the safety of the side wall of the inner barrel 3, the purpose of anti-corrosion of the desulfurization tower can be achieved. The magnesium alloy sleeve 7 is replaced to improve the practicability and sustainability of the device and avoid leakage caused by the corrosion of the inner barrel 3.

[0038] The preferred embodiments of the present utility model disclosed above are only used to help explain the present utility model. The preferred embodiments do not describe all the details in detail, nor limit the present utility model to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present utility model, so that those skilled in the relevant technical field can understand and utilize the present utility model well. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A desulfurization tower inner wall anti-corrosion device, characterized in that: include: A base (1), an outer shell (2), an inner barrel (3), an anode block (4), a conducting coil (5), and a rectifier (6); an annular insulating seat (11) is provided on the base (1), a plurality of anode blocks (4) are arranged in the insulating seat (11), a mounting hole (13) is provided on the outer periphery of the insulating seat (11), a mounting rod (31) is provided on the base of the inner barrel (3), the inner barrel (3) is fixed to the mounting hole (13) by the mounting rod (31), and a plurality of grooves (32) are provided on the bottom of the inner barrel (3) corresponding to the anode blocks (4), and the outer shell (2) is vertically welded to the outer edge of the base (1); When the inner barrel (3) is fixed to the base (1), the anode block (4) is just inserted into the groove (32); a rectifier (6) is provided at the lower end of the base (1); a positive electrode of the rectifier (6) is connected to the anode block (4); a coil-shaped wire (12) is provided on the outer side of the insulating seat (11); and the coil-shaped wire (12) is connected to a negative electrode of the rectifier (6); A sleeve (7) is provided on the outer side of the inner barrel (3), and the sleeve (7) is tightly fitted with the outer wall of the inner barrel (3). The conductor coil (5) is provided on the outer side of the sleeve (7), and a gap is provided between the conductor coil (5) and the sleeve (7). The top and bottom of the conductor coil (5) are respectively connected to the bottom of the top of the sleeve (7).

2. According to claim 1, a desulfurization tower inner wall anti-corrosion device is characterized in that: The anode block (4) is made of graphite anode material and has a cylindrical structure.

3. The desulfurization tower inner wall anti-corrosion device according to claim 1, characterized in that: The sleeve (7) is made of magnesium alloy material.

4. The desulfurization tower inner wall anti-corrosion device according to claim 1, characterized in that: An insulating tube (8) is provided in the gap between the outer shell (2) and the conductor coil (5), and the insulating tube (8) is made of chloroprene rubber material.

5. The desulfurization tower inner wall anti-corrosion device according to claim 1, characterized in that: The insulating seat (11) is made of alumina ceramics.

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