Energy-saving composite boiler water conditioner for drum boiler, and preparation method thereof

Abstract

The invention discloses an energy-saving composite boiler water conditioner for a drum boiler, and a preparation method thereof. The energy-saving composite boiler water conditioner comprises, by mass, 3-20% of organic polyamine, 2-20% of polycarboxylate, 0-10% of organic phosphate, 3-10% of a chelating agent, 2-15% of a corrosion inhibitor, 1-5% of an alkalizing agent, 0.1-2% of an emulsifying agent, 0.1-1% of a defoaming agent, and the balance of deionized water. The method comprises the following steps: adding a certain amount of deionized water into a reactor with a stirring device, heating the deionized water, adding the polycarboxylate and the organic phosphate into a reaction kettle when the water temperature reaches 40 DEG C, adding the chelating agent and the corrosion inhibitor 20 min later, performing continuous stirring for 10-15 min, heating the obtained mixture to 60-70 DEG C, adding the emulsifier and the organic polyamine, adding the alkalizing agent, performing stirring for 10-15 min, finally adding the defoaming agent, performing stirring for 30-40 min, and standing the obtained mixture for 3 h. The energy-saving composite boiler water conditioner can form a continuous hydrophobic protective film on the surface of metal to prevent the metal from being corroded, can be complexed with Ca<2+>, Mg<2+>, iron ions, copper ions and silicon ions to destroy or preventthe formation of crystal sprouts and promote crystal lattice distortion.

Description

Technical field [0001] The invention relates to the technical field of water treatment, specifically an energy-saving composite boiler water conditioner for steam drum boilers and a preparation method thereof. Background technique [0002] With the acceleration of my country's industrialization process, more and more steam drum boiler systems are applied to industrial production. How to prevent boiler equipment from scaling and rust is a major problem in current industrial water treatment. So far, the vast majority of domestic drum steam boilers still use the traditional phosphate dosing control method: although phosphate can solve the scaling and corrosion problems of industrial boiler water treatment to a certain extent, this control method is due to Due to the inherent defects of phosphates, sewage must be increased to ensure the quality of boiler steam and water. However, excessive sewage not only causes a huge waste of energy, increases the fuel consumption of the boil...

AI Technical Summary

Problems solved by technology

So far, the vast majority of drum steam boilers in China still use the traditional phosphate dosing control method: although phosphate can solve the scaling and corrosion problems of industrial boiler water treatment to a certain extent, this control method is due to Due to the congenital defect of phosphate, it is necessary to increase the blowdown to ensure the quality of the steam and water in the boiler. However, excessive blowdown not only causes a huge waste of energy, but also increases the fuel consumption of the boiler and increases the operating cost of the boiler.

And frequent opening of the valve to discharge sewage not only increases labor consumption, but also increases safety hazards

[0003] Phosphate control is unstable and lagging behind, and it is easy to cause steam and water to co-volume, which directly causes the phenomenon of steam carrying water. The high-concentration salt boiler water is carried into the steam system in large quantities due to foaming and expansion, directly causing the conductivity of the steam, sodium ions, The silica and other indicators exceed the standard, which will cause scaling and corrosion of the steam turbine, directly lead to scaling and leakage of the steam trap in the downstream steam network, and even damage the steam equipment caused by water hammer in severe cases

Therefore, the traditional phosphate control not only causes unstable operation of the boiler, but also poses a serious threat to the normal operation of the downstream steam pipe network and steam-consuming equipment.