Method for removing thick-layer limescale at bottom of boiler

Abstract

The invention discloses a method for removing thick-layer limescale at the bottom of a boiler, and belongs to the field of limescale removing. According to the method, a prepared viscous solution is cured on a needle, the needle is inserted into the limescale, soft water is added, and heating is conducted, so that a solid on the needle is melted and makes contact with an interface, and then the limescale is disengaged; a scale inhibitor is prepared, and the boiler bottom subjected to limescale removing is smeared with the scale inhibitor to be protected. According to the method for removing the thick-layer limescale at the bottom of the boiler, a chemical method is combined with a physical method, a good descaling effect on the limescale with large thickness is achieved, the descaling time is short, the good scale inhibition performance is achieved due to the fact that the prepared scale inhibitor is used for protection, biodegradability is achieved, and toxicity does not exist.

Description

technical field [0001] The invention discloses a method for removing thick-layer scale at the bottom of a boiler, belonging to the field of scale removal. Background technique [0002] Under the action of high-temperature circulation, boiler water is very easy to form dirt on the inner wall of the boiler and pipes (usually [0003] Often carbonates), a large number of practical experience and lessons show that with the continuous increase of the thickness of the dirt on the inner wall of boilers and pipelines, the dirt will inevitably have a negative impact on many parameters such as the flow rate of circulating water and heat conduction. Practical experience It shows that if the water is directly added to the boiler without treatment or treatment is not in place, scale will be formed on the heating surface of the boiler after high temperature operation, and it will gradually thicken as time goes by. Theoretical research shows that the thermal conductivity of scale is It is...

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention: for the current scaling layer below 5mm, it can be completed by chemical treatment alone, but when the scaling reaches more than 5mm, it is difficult to complete the general chemical treatment, and thick scale not only affects the heat transfer of the boiler effect, and it will lead to the problem of uneven heating and explosion. A method for removing thick scale by using a combination of chemical and physical methods is provided. The present invention solidifies the prepared viscous liquid on the needle and inserts the needle into the scale. , and add soft water to heat, so that the solid on the needle melts and contacts with the interface to remove the scale, and prepares an antiscalant and smears it on the bottom of the pot after descaling for protection. The present invention combines chemical and physical methods. The scale also has a good descaling effect, and the descaling time is short, and the prepared scale inhibitor has good scale inhibition performance for protection, and is biodegradable and non-toxic