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Method for preventing corrosion in large waste animal and vegetable oil carbon steel storage tank

A technology for discarded animals, plants, and steel storage tanks, which is applied in the direction of anti-corrosion coatings, coatings, and adhesive additives. It can solve the problems of difficult maintenance and shortened service life of large carbon steel storage tanks, and achieve low construction difficulty and low production costs. Low, the effect of meeting the requirements of corrosion resistance

Pending Publication Date: 2022-01-21
江西尊创新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The service life of large carbon steel storage tanks is shortened and maintenance is difficult

Method used

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  • Method for preventing corrosion in large waste animal and vegetable oil carbon steel storage tank
  • Method for preventing corrosion in large waste animal and vegetable oil carbon steel storage tank
  • Method for preventing corrosion in large waste animal and vegetable oil carbon steel storage tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 Anticorrosion method in large-scale waste animal and vegetable oil carbon steel storage tank

[0024] S1. Carry out sandblasting and derusting treatment on the inner wall and bottom plate of the storage tank. The level of sandblasting and rust removal on the inner wall and bottom plate of the storage tank must class;

[0025] S2. Coat the tank wall and bottom plate after derusting with a primer layer. After the primer layer is hardened, use resin cement to repair the uneven parts of the concave-convex holes and the inner and outer corners;

[0026] S3. Coating anti-corrosion resin on the primer layer, then laying high-density glass fiber cloth, and then coating anti-corrosion resin to form a layer of chopped strand mat, laying three layers continuously, and then coating sequentially on the uppermost layer of chopped strand mat Anti-corrosion resin, laying low-density glass fiber cloth, and then coating anti-corrosion resin to form a surface mat. The inner...

Embodiment 2

[0029] Embodiment 2 Anticorrosion method in large-scale waste animal and vegetable oil carbon steel storage tank

[0030] S1. Carry out sandblasting and derusting treatment on the inner wall and bottom plate of the storage tank. The level of sandblasting and rust removal on the inner wall and bottom plate of the storage tank must class;

[0031] S2. Coat the tank wall and bottom plate after derusting with a primer layer. After the primer layer is hardened, use resin cement to repair the uneven parts of the concave-convex holes and the inner and outer corners;

[0032] S3. Coating anti-corrosion resin on the primer layer, then laying high-density glass fiber cloth, and then coating anti-corrosion resin to form a layer of chopped strand mat, laying three layers continuously, and then coating sequentially on the uppermost layer of chopped strand mat Anti-corrosion resin, laying low-density glass fiber cloth, and then coating anti-corrosion resin to form a surface mat. The inner...

Embodiment 3

[0035] Embodiment 3 Anticorrosion method in large-scale waste animal and vegetable oil carbon steel storage tank

[0036] S1. Carry out sandblasting and derusting treatment on the inner wall and bottom plate of the storage tank. The level of sandblasting and rust removal on the inner wall and bottom plate of the storage tank must class;

[0037] S2. Coat the tank wall and bottom plate after derusting with a primer layer. After the primer layer is hardened, use resin cement to repair the uneven parts of the concave-convex holes and the inner and outer corners;

[0038] S3. Coating anti-corrosion resin on the primer layer, then laying high-density glass fiber cloth, and then coating anti-corrosion resin to form a layer of chopped strand mat, laying three layers continuously, and then coating sequentially on the uppermost layer of chopped strand mat Anti-corrosion resin, laying low-density glass fiber cloth, and then coating anti-corrosion resin to form a surface mat. The inner...

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Abstract

The invention relates to the technical field of tank body corrosion prevention, in particular to a method for preventing corrosion in a large waste animal and vegetable oil carbon steel storage tank. According to the method, sand blasting and derusting treatment is carried out on the inner wall of the storage tank and a bottom plate; the derusted tank wall and the derusted bottom plate are coated with a priming coat, and after the priming coat is hardened, uneven parts of concave-convex holes and internal and external corners are repaired by the adoption of resin mortar; a chopped strand mat and a surfacing mat are continuously laid on the priming coat, and the internal and external corners and weld joints are repaired with the resin mortar; and after all paved mat layers are naturally cured for 24 h, cover layer construction is conducted, and after the hardness of a cover layer is larger than or equal to 30 HBa, using can be conducted. Compared with the prior art, an FRP lining is formed on the inner wall of the carbon steel storage tank, the requirement for corrosion resistance can be met, the service life of the large carbon steel storage tank can be prolonged, and compared with various anti-corrosion schemes such as lining polytetrafluoroethylene, supersonic electric arc spraying and lining rubber, the FRP lining has the advantages of small construction difficulty and low production cost.

Description

technical field [0001] The invention relates to the technical field of anticorrosion of tank bodies, in particular to a method for anticorrosion inside a large-scale waste animal and vegetable oil carbon steel storage tank. Background technique [0002] The main raw material for biodiesel production is waste animal and vegetable oil. The waste animal and vegetable oil (less corrosive) at normal temperature cannot be transported in a solidified state. In order to ensure the supply of raw materials during continuous production, it is necessary to carry out Heat tracing, the general heat tracing temperature is 60-80°C. The corrosion mechanism of waste animal and vegetable oil after heating is electrochemical corrosion and other types of corrosion. Corrosion media mainly include: free fatty acid, chloride ion, sulfide and other impurities. In actual production, it is found that the corrosion performance of waste animal and vegetable oil after heating is enhanced, which leads t...

Claims

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Application Information

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IPC IPC(8): B29C73/02B29C73/10B29C73/26C09D5/08C09D163/00C09J11/04C09J163/10
CPCB29C73/02B29C73/10B29C73/26C09J163/10C09J11/04C09D163/00C09D5/08B29C2073/262C08K3/36C08K3/34
Inventor 刘洪李丹王安建
Owner 江西尊创新能源有限公司
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