Biological aeration derusting method

A biological aeration and aeration technology, applied in the field of anti-rust materials, can solve the problems of secondary pollution of the environment, rising pH value, complicated operation, etc., and achieve the effects of improving the rust removal rate, high work efficiency, and simple and convenient operation.

Inactive Publication Date: 2015-09-16
北京知淘科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention: Aiming at the problems of low rust removal rate, complex operation, high cost, and secondary pollution to the environment of various commonly used rust removal methods in the process of use, a biological aeration method is provided. Rust removal method, through the use of air oxidation and water to accelerate the generation of rust under acidic conditions, at the same time, the rust on the surface of the aeration will fall off, the pH value will rise, and then a method of cultivating biofilm will be used to form the surface of the steel A dense biofilm is exposed to the sun to make it fall off layer by layer, so as to obtain a new steel pipe. This method is relatively thorough in rust removal, relatively low in cost, and has no secondary pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] First, place the steel pipe to be removed in the clean water pool, adjust the pH value to 5.5, start the aeration of the perforated pipe for 15 minutes, and introduce domestic sewage when the pH value of the clean water reaches neutral; then add sludge to it with a concentration of 3000mg / L When the dissolved oxygen in the sewage reaches 3.0mg / L, stop the aeration, add a small amount of formaldehyde solution, and let it stand for 3 days; wait for the surface of the steel pipe to form A dense biofilm is then taken out, exposed to the sun to make the surface biofilm age and fall off; finally rinse the steel pipe with clean water.

[0021] In this example, there is no secondary pollution to the environment during use, the rust removal is relatively thorough, and the rust removal rate is as high as 99.8%.

example 2

[0023] First, place the steel pipe to be removed in the clear water tank, adjust the pH value to 6.0, start the aeration of the perforated pipe for 20 minutes, and introduce domestic sewage when the pH value of the clear water reaches neutral; then add sludge concentration to 3000mg / L When the dissolved oxygen in the sewage reaches 3.0mg / L, stop the aeration, add a small amount of formaldehyde solution, and let it stand for 4 days; wait for the surface of the steel pipe to form A dense biofilm is then taken out, exposed to the sun to make the surface biofilm age and fall off; finally rinse the steel pipe with clean water.

[0024] In this example, there is no secondary pollution to the environment during use, and the rust removal is relatively thorough, and the rust removal rate is as high as 99.9%.

example 3

[0026] First, place the steel pipe to be removed in the clear water tank, adjust the pH value to 6.5, start the aeration of the perforated pipe for 30 minutes, and introduce domestic sewage when the pH value of the clear water reaches neutral; then add sludge concentration to 3000mg / L When the dissolved oxygen in the sewage reaches 3.0mg / L, stop the aeration, and add a small amount of formaldehyde solution at the same time, and let it stand for 5 days; when the surface of the steel pipe is formed A dense biofilm is then taken out, exposed to the sun to make the surface biofilm age and fall off; finally rinse the steel pipe with clean water.

[0027] In this example, there is no secondary pollution to the environment during use, and the rust removal is relatively thorough, and the rust removal rate is as high as 99.99%.

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PUM

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Abstract

The invention relates to a biological aeration derusting method, and belongs to the field of anti-rusting materials. According to the biological aeration derusting method, under the action of air oxidation and water, rusting can be accelerated under acid conditions, the rust on the surface can be dropped off through aeration, after the pH value is increased, a method for culturing a biological membrane is adopted to prevent a steel tube of which the rust is dropped from being further oxidized, then internal steel can be protected when isolated from air and water because of the dense biological membrane formed on the surface of steel; in addition, the dense biological membrane on the surface can be dropped off layer by layer through sunshine solarization, and a new steel tube can be obtained after being washed with clean water. The biological aeration derusting method is simple to operate, relatively low in cost, and free of secondary pollution on the environment, and the embodiment shows that the derusting rate can be greater than or equal to 99.8%.

Description

technical field [0001] The invention relates to a biological aeration rust removal method, which belongs to the field of antirust materials. Background technique [0002] In daily life, rust generally refers to iron oxide, also known as ferric oxide, red powder, iron red, etc., which is reddish-brown powder dissolved in hydrochloric acid; ferric oxide is the main component of rust, and the main cause of rust is iron metal In the presence of impurity carbon, it reacts with moisture and oxygen in the environment, and iron metal will rust. Generally, it is used in industries such as paint, ink, and rubber. It can be used as a catalyst, a polishing agent for glass, gemstones, and metals. It can be used as a raw material for ironmaking, and the biggest application of iron oxide is as a pigment. [0003] With the rapid development of social economy and the rapid changes of cities, various construction industries can be said to be the "leaders" in modern industries, so steel has b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08
Inventor 雷春生张帆
Owner 北京知淘科技有限责任公司
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