Corrosion-resistant catalytic protective layer structure for inner wall of hydrogen peroxide vacuum flash tank

Abstract

The utility model provides an anti-corrosion catalytic protective layer structure for the inner wall of a hydrogen peroxide vacuum flash tank, which relates to the technical field of protection of the inner wall of the hydrogen peroxide vacuum flash tank and comprises a hydrogen peroxide vacuum flash tank body, a tank wall lining layer is arranged at the inner side end of the hydrogen peroxide vacuum flash tank body, and the inner wall of the tank wall lining layer is provided with an anti-corrosion catalytic protective layer. An anti-corrosion lining surface layer is arranged on the outer surface of the tank wall lining layer, a polyketone resin lining interlayer is tightly attached to the inner side of the anti-corrosion lining surface layer through a PVDF polymerization layer, the inner side face of the polyketone resin lining interlayer is seamlessly connected with an anti-corrosion lining layer, and the anti-corrosion lining layer comprises a stainless steel layer and a corrosion inhibition blocking layer. The utility model solves the problem that the stainless steel single-layer inner wall of the existing vacuum flash tank is difficult to resist the corrosion of evaporated and concentrated high-concentration hydrogen peroxide for a long time.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydrogen peroxide vacuum flash tank inner wall protection technical field, concretely relates to a kind of hydrogen peroxide vacuum flash tank inner wall anticorrosion catalytic protective layer structure. BACKGROUND

[0002] Hydrogen peroxide vacuum flash tank is a kind of equipment for processing hydrogen peroxide working fluid, mainly used to realize vacuum dehydration in anthraquinone hydrogen peroxide production process, when saturated liquid under high pressure enters the container under relatively low pressure, these saturated liquids become saturated steam and saturated liquid under the pressure of part of container due to the sudden reduction of pressure. To the processing of hydrogen peroxide working fluid, the pressure in the tank is reduced by vacuum pump, so that the water in the working fluid evaporates into water vapor, which is discharged through the water vapor outlet, thereby realizing the dehydration effect, wherein the inner wall of hydrogen peroxide vacuum flash tank is usually made of stainless steel material, but the single-layer stainless steel inner wall of existing vacuum flash tank is difficult to resist the corrosion of high-concentration hydrogen peroxide evaporated and concentrated for a long time. SUMMARY

[0003] In order to overcome the defects existing in the prior art, a hydrogen peroxide vacuum flash tank inner wall anticorrosion catalytic protective layer structure is provided to solve the problem that the single-layer stainless steel inner wall of existing vacuum flash tank is difficult to resist the corrosion of high-concentration hydrogen peroxide evaporated and concentrated for a long time.

[0004] To achieve the above purpose, a hydrogen peroxide vacuum flash tank inner wall anticorrosion catalytic protective layer structure is provided, which comprises: a hydrogen peroxide vacuum flash tank body, a tank wall lining layer is arranged on the inner side of the hydrogen peroxide vacuum flash tank body,

[0005] The outer surface of the tank wall lining layer is provided with an anticorrosion lining surface layer, the inner side of the anticorrosion lining surface layer is tightly attached to a polyketone resin lining interlayer through a PVDF polymer layer, the inner side of the polyketone resin lining interlayer is seamlessly connected to an anticorrosion lining inner layer, and the anticorrosion lining inner layer contains a stainless steel layer and a corrosion inhibition blocking layer.

[0006] Further, the hydrogen peroxide vacuum flash tank body contains a tank wall lining layer, a tank wall strength layer and a tank wall outer surface layer from inside to outside.

[0007] Further, the outer side of the PVDF polymer layer is tightly attached to the tank wall strength layer through a polypropylene protective layer.

[0008] Further, the inner side of the stainless steel layer is coated with a corrosion inhibition blocking layer.

[0009] Further, the thickness of the anticorrosion lining surface layer is 0.5-2mm.

[0010] Further, the thickness of the stainless steel layer is 3-6mm.

[0011] Further, the polyketone resin inner lining sandwich layer has a thickness of 1.5-3mm.

[0012] The hydrogen peroxide vacuum flash tank wall structure has the advantages that the hydrogen peroxide vacuum flash tank inner wall corrosion-resistant catalytic protective layer structure utilizes the corrosion-resistant inner lining layer, the polyketone resin inner lining sandwich layer and the corrosion-resistant inner lining surface layer to form a multilayer composite corrosion-resistant tank wall protective layer, the stainless steel layer and the corrosion inhibition blocking layer in the corrosion-resistant inner lining layer are used as the corrosion-resistant main layer to slow down and block the contact of hydrogen peroxide with the polyketone resin inner lining sandwich layer and the corrosion-resistant inner lining surface layer, the corrosion degree of hydrogen peroxide is delayed, the corrosion resistance of the hydrogen peroxide vacuum flash tank inner wall is efficiently improved, the corrosion of hydrogen peroxide to the tank wall is resisted and slowed down, the leakage of high-concentration hydrogen peroxide caused by corrosion and damage of the vacuum flash tank wall is reduced, the hydrogen peroxide vacuum flash tank is more safe in processing hydrogen peroxide, and the service life of the hydrogen peroxide vacuum flash tank wall is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 FIG. 1 is a front view structural schematic diagram of a hydrogen peroxide vacuum flash tank wall structure according to the utility model embodiment.

[0014] Fig. 2 FIG. 2 is a partial cross-sectional structural schematic diagram of a hydrogen peroxide vacuum flash tank inner wall corrosion-resistant catalytic protective layer structure according to the utility model embodiment.

[0015] Fig. 3 FIG. 3 is a partial cross-sectional structural schematic diagram of a corrosion-resistant inner lining layer according to the utility model embodiment.

[0016] Fig. 4 FIG. 4 is a partial cross-sectional structural schematic diagram of a corrosion-resistant inner lining surface layer according to the utility model embodiment.

[0017] In the drawing: 1, hydrogen peroxide vacuum flash tank body; 2, tank wall inner lining layer; 3, tank wall strength layer; 4, tank wall outer surface layer; 5, corrosion-resistant inner lining layer; 51, stainless steel layer; 52, corrosion inhibition blocking layer; 6, polyketone resin inner lining sandwich layer; 7, corrosion-resistant inner lining surface layer; 71, PVDF polymerization layer; 72, polypropylene protective layer. DETAILED DESCRIPTION

[0018] Referring to Figs. 1 to 4 The hydrogen peroxide vacuum flash tank inner wall corrosion-resistant catalytic protective layer structure provided by the utility model has the advantages that the hydrogen peroxide vacuum flash tank body is provided with the tank wall inner lining layer, the tank wall strength layer, the tank wall outer surface layer, the corrosion-resistant inner lining layer, the polyketone resin inner lining sandwich layer and the corrosion-resistant inner lining surface layer, the corrosion-resistant inner lining layer is composed of the stainless steel layer and the corrosion inhibition blocking layer, the polyketone resin inner lining sandwich layer is composed of the polyketone resin inner lining upper layer and the polyketone resin inner lining lower layer, the corrosion-resistant inner lining surface layer is composed of the PVDF polymerization layer and the polypropylene protective layer, the corrosion-resistant inner lining layer, the polyketone resin inner lining sandwich layer and the corrosion-resistant inner lining surface layer are combined to form the multilayer composite corrosion-resistant tank wall protective layer, the stainless steel layer and the corrosion inhibition blocking layer in the corrosion-resistant inner lining layer are used as the corrosion-resistant main layer to slow down and block the contact of hydrogen peroxide with the polyketone resin inner lining sandwich layer and the corrosion-resistant inner lining surface layer, the corrosion degree of hydrogen peroxide is delayed, the corrosion resistance of the hydrogen peroxide vacuum flash tank inner wall is efficiently improved, the corrosion of hydrogen peroxide to the tank wall is resisted and slowed down, the leakage of high-concentration hydrogen peroxide caused by corrosion and damage of the vacuum flash tank wall is reduced, the hydrogen peroxide vacuum flash tank is more safe in processing hydrogen peroxide, and the service life of the hydrogen peroxide vacuum flash tank wall is prolonged.

[0019] The outer surface of the tank wall lining layer 2 is provided with a corrosion-resistant lining surface layer 7, the inner side of the corrosion-resistant lining surface layer 7 is tightly attached with a polyketone resin lining interlayer 6 through a PVDF polymer layer 71, the inner side of the polyketone resin lining interlayer 6 is seamlessly connected with a corrosion-resistant lining inner layer 5, and the corrosion-resistant lining inner layer 5 contains a stainless steel layer 51 and a corrosion inhibition blocking layer 52.

[0020] The corrosion-resistant lining inner layer, the polyketone resin lining interlayer and the corrosion-resistant lining surface layer form a multi-layer composite corrosion-resistant tank wall lining layer 2, the stainless steel layer 51 and the corrosion inhibition blocking layer 52 in the corrosion-resistant lining inner layer 5 serve as the main corrosion-resistant layer to slow down the release and block the contact of hydrogen peroxide with the polyketone resin lining interlayer 6 and the corrosion-resistant lining surface layer 7, thereby delaying the corrosion degree of hydrogen peroxide, efficiently improving the corrosion resistance of the inner wall of the hydrogen peroxide vacuum flash tank, facilitating the resistance and corrosion inhibition of hydrogen peroxide on the tank wall, reducing the damage of the vacuum flash tank wall caused by corrosion, preventing the leakage of high-concentration hydrogen peroxide, ensuring the safety of the vacuum flash tank in handling hydrogen peroxide, and prolonging the service life of the hydrogen peroxide vacuum flash tank wall.

[0021] In the embodiment, the hydrogen peroxide vacuum flash tank body 1 contains, from the inside to the outside, a tank wall lining layer 2, a tank wall strength layer 3 and a tank wall outer surface layer 4.

[0022] As a preferred embodiment, the tank wall lining layer 2 adopts a multi-layer composite corrosion-resistant structure layer to contact hydrogen peroxide and has high corrosion-resistant catalytic performance. The tank wall strength layer 3 adopts a general unsaturated polyester resin as a matrix and glass fiber untwisted roving cloth as a reinforcing material to provide the strength and stability of the tank wall of the hydrogen peroxide vacuum flash tank body 1. The hydrogen peroxide vacuum flash tank body 1 adopts an unsaturated polyester resin with excellent weather resistance as a matrix and glass fiber surface felt or glass fiber untwisted roving cloth as a reinforcing material to protect the hydrogen peroxide vacuum flash tank body 1 from the external environment and prolong the service life.

[0023] In the embodiment, the outer side of the PVDF polymer layer 71 is tightly attached with the tank wall strength layer 3 through a polypropylene protective layer 72.

[0024] As a preferred embodiment, the PVDF polymer layer 71 has excellent corrosion resistance and serves as the outermost protective layer of the tank wall lining layer 2 to prevent hydrogen peroxide from continuing to corrode outwardly. The polypropylene protective layer 72 is used to protect the PVDF polymer layer 71 from brittle fracture caused by excessive impact.

[0025] In the embodiment, the inner side of the stainless steel layer 51 is coated with the corrosion inhibition blocking layer 52. The thickness of the corrosion-resistant lining surface layer 7 is 0.5-2 mm. The thickness of the stainless steel layer 51 is 3-6 mm. The thickness of the polyketone resin lining interlayer 6 is 1.5-3 mm.

[0026] As a preferred embodiment, the corrosion inhibition blocking layer 52 is a slow-release agent coating, which forms a protective film on the surface of the stainless steel layer 51 by slow-release agent, blocks the direct contact of hydrogen peroxide with the stainless steel layer 51, and thus relieves the corrosion degree of the stainless steel layer 51 and prolongs the service life of the stainless steel layer 51. The polyketone resin inner lining layer 6 has high thermal stability, high strength and good chemical corrosion resistance, and can firmly composite and bond the corrosion-resistant inner lining layer 5 and the corrosion-resistant inner lining surface layer 7, thereby efficiently improving the corrosion resistance of the tank wall lining layer 2 of the hydrogen peroxide vacuum flash tank 1, reducing the corrosion damage of the vacuum flash tank wall, leading to high-concentration hydrogen peroxide leakage, and ensuring the vacuum flash tank to be safer for handling hydrogen peroxide.

[0027] The hydrogen peroxide vacuum flash tank inner wall corrosion-resistant catalytic protection layer structure can effectively solve the problem that the stainless steel single-layer inner wall of the existing vacuum flash tank is difficult to resist the corrosion of high-concentration hydrogen peroxide evaporated and concentrated for a long time, efficiently improves the corrosion resistance of the inner wall of the hydrogen peroxide vacuum flash tank, is convenient for resisting and corrosion-inhibiting the corrosion of hydrogen peroxide on the tank wall, reduces the corrosion damage of the vacuum flash tank wall, leading to high-concentration hydrogen peroxide leakage, ensures the vacuum flash tank to be safer for handling hydrogen peroxide, improves the service life of the tank wall of the hydrogen peroxide vacuum flash tank, and is suitable for the hydrogen peroxide vacuum flash tank inner wall corrosion-resistant catalytic protection layer structure.

Claims

1. A catalytic corrosion protection layer structure for the inner wall of a hydrogen peroxide vacuum flash tank, comprising: Hydrogen peroxide vacuum flash tank body (1), the inside end of the hydrogen peroxide vacuum flash tank body (1) is provided with a tank wall lining layer (2), characterized in that: the outer surface of the tank wall lining layer (2) is provided with a corrosion-resistant lining surface layer (7), the inner side of the corrosion-resistant lining surface layer (7) is tightly combined with a polyketone resin lining interlayer (6) through a PVDF polymer layer (71), the inner side surface of the polyketone resin lining interlayer (6) is seamlessly connected with a corrosion-resistant lining layer (5), and the corrosion-resistant lining layer (5) contains a stainless steel layer (51) and a corrosion inhibition blocking layer (52).

2. The corrosion-resistant catalytic protective layer structure for the inner wall of a hydrogen peroxide vacuum flash tank according to claim 1, characterized in that, The hydrogen peroxide vacuum flash tank body (1) contains a tank wall lining layer (2), a tank wall strength layer (3) and a tank wall outer surface layer (4) from inside to outside.

3. The corrosion-resistant catalytic protective layer structure for the inner wall of a hydrogen peroxide vacuum flash tank according to claim 1, characterized in that, The outer side surface of the PVDF polymer layer (71) is tightly attached to the tank wall strength layer (3) through a polypropylene protective layer (72).

4. The corrosion-resistant catalytic protective layer structure for the inner wall of a hydrogen peroxide vacuum flash tank according to claim 1, characterized in that, The inner side surface of the stainless steel layer (51) is coated with a corrosion inhibition blocking layer (52).

5. The corrosion-resistant catalytic protective layer structure for the inner wall of a hydrogen peroxide vacuum flash tank according to claim 1, characterized in that, The thickness of the corrosion-resistant lining surface layer (7) is 0.5-2mm.

6. The corrosion-resistant catalytic protective layer structure for the inner wall of a hydrogen peroxide vacuum flash tank according to claim 1, characterized in that, The thickness of the stainless steel layer (51) is 3-6mm.

7. The corrosion-resistant catalytic protective layer structure for the inner wall of a hydrogen peroxide vacuum flash tank according to claim 1, characterized in that, The thickness of the polyketone resin lining interlayer (6) is 1.5-3mm.

Images