Boiler feedwater deoxidant for replacing thermal deaerator and preparation and application methods thereof
A technology for boiler feed water and thermal deaeration, which is applied to chemical instruments and methods, descaling and water softening, degassed water/sewage treatment, etc. It can solve problems such as energy waste and poor deaeration effect, and prolong service life , Reduce the risk of oxidation, slow down the effect of corrosion rate
Inactive Publication Date: 2015-03-11
上海南阳精细化工有限公司 +1
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[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further elaborated.
[0016] A boiler feed water oxygen scavenger replacing a thermal deaerator, the weight of its ingredients is: 4 kg of sodium metabisulfite, 0.5 kg of potassium thiocyanate, 10 g of bisphenol A phosphite, 20 g of methyl hydroquinone, chlorine 10 grams of cobalt oxide, 10 grams of copper sulfate, and 10 grams of p-benzoquinone.
[0017] The preparation method of the above-mentioned boiler feed water deoxygenation and corrosion inhibitor includes the following steps: mixing and stirring the ingredients in the above-mentioned raw material formula, and adding water to prepare 25 kg of water solvent.
[0018] The usage method of the above-mentioned boiler feed water deoxidation and corrosion inhibitor is to add 25 kg of the above-mentioned boiler feed water deoxidation and corrosion inhibitor water ...
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The invention discloses a boiler feedwater deoxidant for replacing a thermal deaerator and preparation and application methods thereof. The deoxygenization inhibitor comprises the following ingredients, by weight, 87.72% of sodium pyrosulfite, 10.96% of potassium thiocyanate, 0.22% of bisphenol A phosphate, 0.44% of methyl hydroquinone, 0.22% of cobaltous chloride, 0.22% of copper sulphate and 0.22% of p-benzoquinone. According to the application method, a hydrosolvent of 20-30 kg of the boiler feedwater deoxygenization inhibitor is added according to 100 tons of boiler feedwater. The invention has the following beneficial effects: (1) a thermal deaerator is replaced for chemical deoxygenation, rapid and thorough deoxygenization can be realized within 20 seconds, the risk of boiler plant oxidation is reduced greatly, and energy conservation and emission reduction can be achieved; (2) the deoxygenization inhibitor has a corrosion inhibition effect, can be used to form a good protective film inside the boiler and can effectively slow down corrosion rate of the boiler plant and prolong service life of the boiler plant; and (3) the deoxygenization inhibitor is harmless to human body and accords with the environmental protection standard as well as GB / T2760-86 national food hygienic standard.
Description
technical field [0001] The invention relates to the technical fields of chemical industry and environmental protection, in particular to a boiler feed water oxygen scavenger replacing a thermal deaerator and a preparation and use method. Background technique [0002] Boiler is a kind of industrial equipment with large volume, which is difficult to install and replace. Therefore, it needs to be maintained and cleaned regularly to delay its aging speed as much as possible. However, after the boiler is used for a long time, scaling and corrosion will inevitably occur, so it is necessary to control the scaling and corrosion of the boiler. In the boiler components (such as the boiler body, the heat exchanger and economizer arranged at the upflow of the boiler body and the downstream steam and condensate pipes arranged in the boiler body), dissolved oxygen becomes one of the main causes of corrosion. In order to prevent the boiler Corrosion of the system requires the removal of d...
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Login to View More IPC IPC(8): C02F1/20C23C22/07
CPCC23C22/07C02F5/145C02F2303/08
Inventor 徐怀飞
Owner 上海南阳精细化工有限公司