Flame-retardant heavy-duty anti-corrosion lining of flue gas desulfurization (FGD) system

Abstract

The utility model discloses a heavy anti-corrosion lining of a flame-retardant flue gas desulfurization (FGD) system, and particularly relates to the field of anti-corrosion materials. The utility model provides a flame retardant type flue gas desulfurization FGD system heavy anti-corrosion lining, which comprises a bottom coating, an anti-corrosion lining, glass fiber cloth and a flame retardant nano composite layer, the anti-corrosion lining is arranged on the bottom coating, the anti-corrosion lining is composed of a plurality of lining bodies, a splicing device is arranged between every two adjacent lining bodies, the glass fiber cloth is arranged on the bottom coating, and the flame retardant nano composite layer is arranged on the glass fiber cloth. The glass fabric is arranged on the anti-corrosion lining, and the flame-retardant nano composite layer is arranged on the glass fabric.

Description

Technical Field

[0001] The utility model relates to the field of anti-corrosion materials, in particular to a flame-retardant heavy anti-corrosion lining of a flue gas desulfurization FGD system. Background Art

[0002] Flue gas desulfurization (FGD) system is a technology used to reduce sulfur dioxide (SO2) emissions in flue gas from coal-fired power plants. Sulfur-containing flue gas is corrosive, so the desulfurization towers, chimney inner walls, etc. in the flue gas desulfurization (FGD) system need to be treated with anti-corrosion to extend their service life and ensure their safe and stable operation. Existing flue gas desulfurization (FGD) systems generally use glass flake mortar, vulcanized rubber sheet or fiberglass lining for anti-corrosion. Among them, glass flake mortar needs to be mixed on site and then applied manually. Due to the high viscosity of the product, its main agent and curing agent are difficult to stir and mix evenly, which can easily cause local or point-like poor curing, and can also easily lead to pitting and bulging, which then spreads to form larger areas of cracking, peeling and falling off; the construction of vulcanized rubber sheet is difficult, and it is easy to bubble during the construction process. The joints of the vulcanized rubber sheet are easy to crack and separate. At the same time, the joints are also the thinnest for the corrosion protection of the vulcanized rubber sheet. The weak link is that after a period of use, small areas of bubbling and peeling begin to appear at the joints of the vulcanized rubber sheets and poorly constructed areas, leading to corrosion and perforation of the equipment. Once the lining is damaged, it is difficult to clean and repair. The vinyl resin used in FRP is generally difficult to resist the complex corrosive media for a long time. Various corrosive ions in the medium can easily penetrate the cross-linked network of the FRP, causing the substrate to "rust" and cause the anti-corrosion lining layer to fall off, peel off, swell and crack. At the same time, glass flake mastic, vulcanized rubber sheets and FRP processes all have major fire safety hazards. Utility Model Content

[0003] The purpose of the utility model is to overcome the above technical problems and provide a flame retardant heavy-duty anti-corrosion lining for a flue gas desulfurization FGD system.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a flame-retardant flue gas desulfurization FGD system heavy anti-corrosion lining, including a primer, an anti-corrosion lining, a glass fiber cloth, and a flame-retardant nano-composite layer. The anti-corrosion lining is arranged on the primer, and the anti-corrosion lining is composed of a plurality of lining bodies. A splicing device is provided between adjacent lining bodies. The glass fiber cloth is arranged on the anti-corrosion lining, and the flame-retardant nano-composite layer is arranged on the glass fiber cloth.

[0005] Furthermore, the splicing device includes a splicing groove and a splicing protrusion, wherein the splicing groove is arranged on one of the lining bodies, and the splicing protrusion is arranged on an adjacent lining body, wherein the splicing protrusion is inserted into the splicing groove.

[0006] Furthermore, the cross-sections of the splicing protrusions and the splicing grooves are isosceles trapezoidal structures.

[0007] Furthermore, the flame-retardant nano-composite layer is formed by brushing a flame-retardant nano-composite emulsion on the glass fiber cloth.

[0008] Furthermore, the thickness of the flame retardant nanocomposite layer is 0.1-0.15 mm.

[0009] Furthermore, it also includes a flame retardant nano sealing coating, which is arranged on the flame retardant nano composite layer.

[0010] Furthermore, the anti-corrosion lining is a stainless steel plate.

[0011] Furthermore, the thickness of the anti-corrosion lining is 2-2.6 mm.

[0012] Furthermore, it also includes connecting through holes and connecting screws, wherein the connecting through holes are arranged at four corners of the lining body, and the connecting screws are inserted into the connecting through holes.

[0013] From the above description of the utility model, it can be seen that compared with the prior art, the heavy-duty anti-corrosion lining of a flame-retardant flue gas desulfurization FGD system provided by the utility model has the following advantages: a base coating is provided, an anti-corrosion lining is provided on the base coating, the anti-corrosion lining is composed of a plurality of lining bodies, and a splicing device is provided between adjacent lining bodies, which is used to connect adjacent lining bodies together and prevent corrosive media from penetrating from the connecting gaps; a glass fiber cloth is provided on the anti-corrosion lining, and a flame-retardant nano-composite layer is provided on the glass fiber cloth. Through the multiple protections of the glass fiber cloth and the flame-retardant nano-composite layer, the corrosion resistance, corrosion medium penetration resistance and flame-retardant performance of the flue gas desulfurization FGD system can be improved, thereby improving the service life of the flue gas desulfurization FGD system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of the heavy-duty anti-corrosion lining of the flame-retardant flue gas desulfurization FGD system of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the splicing device. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present utility model.

[0017] Reference Figure 1 As shown, a flame-retardant flue gas desulfurization FGD system heavy anti-corrosion lining includes a primer layer 1, an anti-corrosion lining 2, a glass fiber cloth 3, and a flame-retardant nano-composite layer 4. The anti-corrosion lining 2 is arranged on the primer layer 1. The anti-corrosion lining 2 is composed of a plurality of lining bodies 21. A splicing device 5 is provided between adjacent lining bodies 21. The splicing device 5 is used to connect adjacent lining bodies 21 together and prevent corrosive media from penetrating from the connecting gaps of the lining bodies 21. The glass fiber cloth 3 is arranged on the anti-corrosion lining 2, and the flame-retardant nano-composite layer 4 is arranged on the glass fiber cloth 3. Through the multiple protections of the glass fiber cloth 3 and the flame-retardant nano-composite layer 4, the anti-corrosion performance, anti-corrosive medium penetration performance and flame-retardant performance of the flue gas desulfurization FGD system can be improved, thereby improving the service life of the flue gas desulfurization FGD system. At the same time, the glass fiber cloth 3 has excellent substrate adhesion and a low thermal expansion coefficient, which can prevent the glass fiber cloth 3 from thermal expansion and prevent the glass fiber cloth 3 from peeling off and falling off from the anti-corrosion lining 2.

[0018] The splicing device 5 includes a splicing groove 51 and a splicing protrusion 52, wherein the splicing groove 51 is arranged on one of the lining bodies 21, and the splicing protrusion 52 is arranged on an adjacent lining body 21, wherein the splicing protrusion 52 is inserted into the splicing groove 51, and the cross-sections of the splicing protrusion 52 and the splicing groove 51 are isosceles trapezoidal structures.

[0019] The flame retardant nano composite layer 4 is formed by brushing a flame retardant nano composite emulsion on the glass fiber cloth 3. The flame retardant nano composite emulsion is the flame retardant nano topcoat 8233-FR produced by Shishi Huabao New Materials Engineering Co., Ltd.

[0020] The thickness of the flame retardant nanocomposite layer 4 is 0.1-0.15 mm.

[0021] A flame retardant nano-sealing coating 6 is disposed on the flame retardant nano-composite layer 4 , wherein the flame retardant nano-sealing coating 6 is a flame retardant nano-sealing coating 8234-05-FR produced by Shishi Huabao New Materials Engineering Co., Ltd.

[0022] The primer layer 1 is nano primer 8231A produced by Shishi Huabao New Materials Engineering Co., Ltd.

[0023] The anti-corrosion lining 2 is a stainless steel plate, and the thickness of the anti-corrosion lining 2 is 2-2.6 mm.

[0024] The lining body 21 is provided with connecting through holes 211 at the four corners. The connecting through holes 211 are provided with connecting screws 7 for fixing the lining body 21 on the area 8 to be protected from corrosion.

[0025] The above are only some specific implementation methods of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A flame retardant flue gas desulfurization FGD system heavy anti-corrosion lining, characterized by: It includes a primer layer, an anti-corrosion lining, a glass fiber cloth, and a flame-retardant nano-composite layer. The anti-corrosion lining is arranged on the primer layer. The anti-corrosion lining is composed of a plurality of lining bodies. A splicing device is provided between adjacent lining bodies. The glass fiber cloth is arranged on the anti-corrosion lining, and the flame-retardant nano-composite layer is arranged on the glass fiber cloth.

2. The flame retardant flue gas desulfurization FGD system heavy anti-corrosion lining according to claim 1 is characterized by: The splicing device includes a splicing groove and a splicing protrusion, wherein the splicing groove is arranged on one of the lining bodies, and the splicing protrusion is arranged on an adjacent lining body, wherein the splicing protrusion is inserted into the splicing groove.

3. The heavy-duty anti-corrosion lining of the flame-retardant flue gas desulfurization FGD system according to claim 2 is characterized by: The cross-sections of the splicing protrusions and the splicing grooves are isosceles trapezoidal structures.

4. The flame retardant flue gas desulfurization FGD system heavy anti-corrosion lining according to claim 3 is characterized by: The flame retardant nano composite layer is formed by brushing a flame retardant nano composite emulsion on the glass fiber cloth.

5. The flame retardant flue gas desulfurization FGD system heavy anti-corrosion lining according to claim 4 is characterized by: The thickness of the flame retardant nanocomposite layer is 0.1-0.15 mm.

6. The flame retardant flue gas desulfurization FGD system heavy anti-corrosion lining according to claim 5 is characterized by: It also includes a flame retardant nano sealing coating, which is arranged on the flame retardant nano composite layer.

7. The flame retardant flue gas desulfurization FGD system heavy anti-corrosion lining according to claim 6 is characterized by: The anti-corrosion lining is a stainless steel plate.

8. The flame retardant flue gas desulfurization FGD system heavy anti-corrosion lining according to claim 7 is characterized by: The thickness of the anti-corrosion lining is 2-2.6 mm.

9. The flame retardant flue gas desulfurization FGD system heavy anti-corrosion lining according to claim 8 is characterized by: It also includes connecting through holes and connecting screws. The connecting through holes are arranged at four corners of the lining body, and the connecting screws are inserted into the connecting through holes.

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