A water treatment method for boiler feed water
A boiler feed water and water treatment technology, applied in water/sewage treatment, water/sewage multi-stage treatment, degassed water/sewage treatment, etc., can solve the problems that the effect needs to be further improved, and achieve the improvement of scale and corrosion inhibition rate Effect
Active Publication Date: 2020-09-25
HANGZHOU HANGMIN THERMAL POWER CO LTD
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Problems solved by technology
The existing technology has played the role of scale and corrosion inhibition to a certain extent, but the inventor found that the effect of corrosion inhibition needs to be further improved
Method used
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Embodiment 1a-1c
[0023] Embodiment 1a-1c: an oxygen scavenger, prepared by the following method: mix hydrazine, PEO-PPO-PEO block copolymer and water uniformly, add polyacrylic acid to the uniformly mixed solution and stir to mix, Then add glycerin and triethanolamine and mix well;
[0024] The formula of embodiment 1a-1c is as shown in table 1;
[0025] Wherein, water only plays a role in dispersing, and its dosage is only limited to the concentration of the formulated hydrazine not lower than the concentration used in the water treatment method, so it is not limited here.
Embodiment 1a
[0028] Embodiment 1a': an oxygen scavenger, the difference from embodiment 1a is that the PEO-PPO-PEO block copolymer adopts PEO-PPO-PEO block copolymer P123.
Embodiment 1
[0029] Example 1d: An oxygen scavenger differing from Example 1a in that all components are mixed directly.
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Abstract
The invention discloses a boiler supply water treatment method. The water treatment method comprises the following steps: sterilization, primary filtering, reverse osmosis, salt removal, oxygen removal and secondary filtering, wherein oxygen removal adopts a manner of combining thermal oxygen removal and chemical oxygen removal; an oxygen removal agent adopted during chemical oxygen removal is prepared by adopting following method: evenly mixing hydrazine, PEO-PPO-PEO block copolymer and water, and the mass ratio of the hydrazine to PEO-PPO-PEO block copolymer is 100:(5-8); and in treatment adopting chemical oxygen removal, the pH value of the supply water is 8.9-9.2, the temperature of the supply water is at 170-185DEG C, and the concentration of hydrazine in the supply water is 25-32mug / L, so that the corrosion inhibition effect is further enhanced.
Description
technical field [0001] The invention relates to a boiler system feed water treatment technology, in particular to a boiler feed water water treatment method. Background technique [0002] The fluids of thermal equipment such as industrial boilers, power plant boilers, and waste heat boilers are water and steam. Corrosion of boiler feed water systems is the main cause of boiler accidents and economic losses. Corrosion-induced equipment or component damage, maintenance time and labor, equipment The loss caused by production stoppage or even serious safety accident is huge. The corrosion of the boiler feed water system is mainly caused by the impurities contained in it. [0003] The Chinese patent with application publication number CN101962243A and application publication date of February 2, 2011 discloses an industrial boiler water treatment method, which is mainly treated by physical and chemical methods, and mainly plays the role of scale and corrosion inhibition. The exi...
Claims
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IPC IPC(8): C02F9/06
CPCC02F1/20C02F1/44C02F1/441C02F1/442C02F1/444C02F1/4691C02F1/50C02F1/5236C02F5/08C02F9/00C02F2301/08Y02A20/131
Inventor 沈松仁许海锋李江
Owner HANGZHOU HANGMIN THERMAL POWER CO LTD