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Ultralow-emission stabilizer for boiler water system and preparation method of same

A stabilizer and ultra-low technology, which is applied in the field of ultra-low emission stabilizer and its preparation for boiler water system, can solve the problems of serious corrosion of water-cooled wall tubes, reduce boiler blowdown rate, increase concentration ratio, save water resources and The effect of heat

Pending Publication Date: 2019-06-07
廊坊盛迪化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, as the solubility of phosphate in the furnace water decreases, the calcium and magnesium scale will increase, and the corrosion of the water wall tube will become serious

Method used

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  • Ultralow-emission stabilizer for boiler water system and preparation method of same

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Effect test

Embodiment 1

[0047] The scale inhibitor is nitrilotriacetic acid trisodium salt, the corrosion inhibitor is sodium molybdate and azodicarbonamide, the regulator is sodium hydroxide, calculated according to mass percentage, nitrilotriacetic acid trisodium salt 23-35%, sodium molybdate 8-10%, azodicarbonamide 2-4%, sodium hydroxide 7-8%, and the balance desalinated water.

Embodiment 2

[0049] The antiscalant is ethylenediaminetetraacetic acid disodium and nitrilotriacetic acid trisodium salt, the corrosion inhibitor is sodium molybdate and azodicarbonamide, and the regulator is sodium hydroxide. Calculated according to mass percentage, ethylenediaminetetraacetic acid di Sodium is 20-38%, nitrilotriacetic acid trisodium salt 13-15%, sodium molybdate is 8-10%, azodicarbonamide is 2-4%, sodium hydroxide is 7-8%, and the balance is desalination water.

Embodiment 3

[0051] The scale inhibitor is disodium ethylenediaminetetraacetic acid and hydroxyphosphorylacetic acid, the corrosion inhibitor is sodium molybdate, and the regulator is sodium hydroxide. Calculated by mass percentage, disodium edetate is 20-38%. Nitrilotriacetic acid trisodium salt 10-13%, sodium molybdate 9-12%, sodium hydroxide 9-14%, and the balance is desalinated water.

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Abstract

The invention discloses an ultralow-emission stabilizer for a boiler water system and a preparation method of same. The ultra-low emission stabilizer comprises a scale inhibitor, a corrosion inhibitor, a regulator and a solvent, which are mixed together, wherein the scale inhibitor includes at least one of EDTA disodium salt, trisodium nitrilotriacetate and hydroxyphosphoryl acetic acid; the corrosion inhibitor includes at least one of sodium molybdate, azodicarbonamide and LAN-826; the regulator is at least one of sodium hydroxide, potassium hydroxide and sodium carbonate; the solvent is desalted water. The ultra-low emission stabilizer is added to a steam pocket of a boiler.

Description

technical field [0001] The invention relates to the technical field of boiler water treatment, in particular to an ultra-low emission stabilizer for a boiler water system and a preparation method thereof. Background technique [0002] During the operation of the boiler, in order to prevent the formation of calcium and magnesium scale and reduce the corrosion of the water-cooled wall tubes, it is usually necessary to add an appropriate amount of trisodium phosphate to the boiler water. This water treatment process in the boiler is called the phosphate salt process. More than 95% of the drum boilers in our country still operate under the boiler water condition. The solubility of phosphate in aqueous solution is temperature dependent. In the range of 10°C-120°C, the solubility increases with the increase of water temperature; when the water temperature rises to 120°C, the solubility reaches the maximum. If the water temperature continues to rise, the solubility will drop shar...

Claims

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Application Information

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IPC IPC(8): C02F5/14
Inventor 马中伟张安杰
Owner 廊坊盛迪化工有限公司
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