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Antisludging agent for low temperature flue gas heat exchange equipment of boiler and preparation method thereof

A technology of low-temperature flue gas and heat exchange equipment, applied in the field of scale inhibitors, can solve the problems of affecting the heat exchange efficiency of heat exchangers, coking and scaling on the surface of heat exchangers, shortening the operation period of devices, etc., and achieves high popularization and application value, The effect of preventing coking and scaling and slowing down coking and scaling

Active Publication Date: 2013-07-10
蒲城驭腾新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The long-term corrosion of heat exchange equipment or chimneys from the gas-fired boilers of the Iron and Steel Group has caused serious problems. Gas and acidic substances, after adding a heat exchanger in the flue, the flue gas flow rate will slow down, and it is easy to coke and scale on the surface of the heat exchanger, which seriously affects the heat exchange efficiency of the heat exchanger, especially in areas with high coke oven gas content Boiler, when the unburned organic matter in the coke oven gas is combined with sulfite and trace dust, it will coke and be serious enough. From the perspective of fouling composition, it is composed of organic matter and inorganic matter, so the cleaning of the heat exchanger is cumbersome and the operation cycle of the device Significantly shortened, increased energy consumption, and significantly reduced economic efficiency. It can be seen that the coking and scale inhibition of heat exchange equipment has become the main problem restricting the long-term operation of the device.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In this example, the antiscalant used for boiler low-temperature flue gas heat exchange equipment includes 10% polyamide polyamine epichlorohydrin (PAE), 2% benzotriazole, and 20% sulfide Calcium phenate, 30% mixed solution of methylpentanol and triethylhexylphosphoric acid with a mass ratio of 1:2, 3% hexamethylenediamine, and 35% mixed solution of n-hexane and ethanol with a volume ratio of 1:1 solvent.

[0020] The preparation method of the scale inhibitor used in the boiler low-temperature flue gas heat exchange equipment in this embodiment includes the following steps:

[0021] 1) Put the solvent mixed by n-hexane and ethanol at a volume ratio of 1:1 into the container, stir and heat up to 45°C, then add 1 / 2 mass of polyamide polyamine epichlorohydrin and 1 / 2 mass of Benzotriazole, stirring at constant temperature until the polyamide polyamine epichlorohydrin and benzotriazole are completely dissolved to obtain a mixed solution A;

[0022] 2) Add sulfurized alkyl...

Embodiment 2

[0025] In this example, the scale inhibitor used for boiler low-temperature flue gas heat exchange equipment includes 15% polyamide polyamine epichlorohydrin (PAE), 3% 8-hydroxyquinoline, 25% long Chain-type alkylbenzene high base value synthetic calcium sulfonate, 30% of a mixture of methyl pentanol and polyacrylamide with a mass ratio of 2:1, 4% of hexamethylenediamine and 23% of n-hexane and ethanol in 1 : A solvent mixed in a volume ratio of 2.

[0026] The preparation method of the scale inhibitor used in the boiler low-temperature flue gas heat exchange equipment in this embodiment includes the following steps:

[0027] 1) Put the solvent mixed by n-hexane and ethanol at a volume ratio of 1:2 into the container, stir and heat up to 50°C, then add 1 / 2 mass of polyamide polyamine epichlorohydrin and 1 / 2 mass of 8-hydroxyquinoline, stirring at constant temperature until the polyamide polyamine epichlorohydrin and 8-hydroxyquinoline are completely dissolved to obtain a mixe...

Embodiment 3

[0032] In this example, the scale inhibitor used for boiler low-temperature flue gas heat exchange equipment includes 20% epoxidized polybutadiene resin, 3% melamine, and 25% long-chain linear alkylbenzene by mass percentage. Base value synthetic calcium sulfonate, 30% of a mixture of methyl pentanol and fatty acid polyethylene glycol ester with a mass ratio of 3:1, 3% of ethylenediamine and 19% by volume of n-hexane and ethanol in a volume of 2:3 than mixed solvents.

[0033] The preparation method of the scale inhibitor used in the boiler low-temperature flue gas heat exchange equipment in this embodiment includes the following steps:

[0034] 1) Put the solvent mixed by n-hexane and ethanol at a volume ratio of 2:3 into the container, stir and heat up to 60°C, then add 1 / 2 mass of epoxidized polybutadiene resin and 1 / 2 mass of Melamine is stirred at constant temperature until the epoxidized polybutadiene resin and melamine are completely dissolved to obtain a mixed solutio...

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PUM

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Abstract

The invention provides an antisludging agent for low temperature flue gas heat exchange equipment of a boiler and a preparation method thereof. The preparation method comprises: putting a solvent, 1 / 2 mass of polymerization inhibitor and 1 / 2 mass of metal passivator in a container, stirring the matters at a constant temperature until the matters are completely dissolved; adding a calcic detergent dispersant and an organic dispersant according to a proportion, stirring the mixture at a constant temperature until the mixture is completely dissolved; and finally, adding the 1 / 2 mass of polymerization inhibitor, the 1 / 2 mass of metal passivator and a diamine acid acceptor according to a proportion, and stirring the mixture at a constant temperature until the mixture is completely dissolved to obtain the antisludging agent for low temperature flue gas heat exchange equipment of boiler. The antisludging agent has the characteristics of little feeding dosage, good economical efficiency and practicability, and high scale inhibition rate, and the like, and the antisludging agent can be used for inhibiting and slowing the coking and scaling problems of low temperature flue gas in the heat exchange equipment, so that the antisludging agent has high generalization and application values and a brilliant market prospect.

Description

technical field [0001] The invention relates to a scale inhibitor, in particular to a scale inhibitor used for boiler flue gas heat exchange equipment and a preparation method thereof. Background technique [0002] The long-term corrosion of heat exchange equipment or chimneys from the gas-fired boilers of the Iron and Steel Group has caused serious problems. Gas and acidic substances, after adding a heat exchanger in the flue, the flue gas flow rate will slow down, and it is easy to coke and scale on the surface of the heat exchanger, which seriously affects the heat exchange efficiency of the heat exchanger, especially in areas with high coke oven gas content Boiler, when the unburned organic matter in the coke oven gas is combined with sulfite and trace dust, it will coke and be serious enough. From the perspective of fouling composition, it is composed of organic matter and inorganic matter, so the cleaning of the heat exchanger is cumbersome and the operation cycle of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C02F5/14
Inventor 陈力群李琳辉张立波
Owner 蒲城驭腾新材料科技有限公司
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