Phosphorus-free treatment agent for boiler water as well as preparation and application of treatment agent

Abstract

The invention relates to a phosphorus-free treatment agent for boiler water as well as preparation and application of the treatment agent. The treatment agent is prepared from the following raw material components in percentages by mass: 16-30% of modified polyaspartic acid, 10-20% of N-(3,4-dihydroxyphenethyl)acrylamide, 10-16% of a pH regulator, 3-8% of a deoxidant, 2-6% of a film-forming auxiliary agent, and the balance of deionized water. The treatment agent is prepared by the following steps: adding the deionized water into a reaction kettle according to the mass percentage content, adding the modified polyaspartic acid and the N-(3,4-dihydroxyphenethyl)acrylamide, performing full and uniform stirring, sequentially adding the deoxidant, the film-forming auxiliary agent and the pH regulator, performing heating to 50-65 DEG C, performing constant-temperature stirring for 20-30 min, and performing natural cooling to room temperature to obtain the treatment agent. In practical application, when the treatment agent is prepared, the components are calculated and added according to an actual water volume of a boiler, and the addition amount is 10-20 g / t. Compared with the prior art,the treatment agent provided by the invention is applied to medium and high-pressure boiler water systems, overcomes various negative effects caused by the use of a phosphate, reduces the blowdown rate of the boiler, saves energy, and has a good application prospect.

Description

technical field

[0001] The invention belongs to the technical field of boiler water treatment, and relates to a phosphorus-free boiler water treatment agent and its preparation and application. Background technique

[0002] As we all know, the boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy and electric energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with certain heat energy. The hot water or steam generated in the boiler can directly provide the required heat energy for industrial production and people's life, and can also be converted into mechanical energy through a steam power device, or converted into electrical energy through a generator. However, in practical applications, under high temperature and high pressure environment, boiler water as an energy transfer medium, a small amount of colloid, calcium, iron and other impurities in the dissolved water are easy t...

Examples

Embodiment 1

[0027] The phosphorus-free boiler water treatment agent of this embodiment is prepared from the following components and raw materials in mass percentage: 24% modified polyaspartic acid, 12% 3-acrylamido dopamine, and 10% pH regulator , 4% oxygen scavenger, 3% film-forming aid, and the balance is deionized water.

[0028] In the present embodiment, modified polyaspartic acid is polyaspartic acid modified by diethyl malonate, and the preparation method comprises the following steps:

[0029] 1) In a water solvent, react maleic anhydride and ammonium salt at 75°C for 1h, then raise the temperature to 172°C, and react for 1h to prepare polysuccinimide;

[0030] 2) Purify the polysuccinimide prepared in step 1), put the purified polysuccinimide in an alkaline aqueous solution, add diethyl malonate, react at 36°C for 16 hours, and then adjust The pH value of the system was adjusted to 5.8, then purified with 10 times the volume of absolute ethanol, stirred to obtain a reddish-brow...

Embodiment 2

[0036] The phosphorus-free boiler water treatment agent of this embodiment is prepared from the following components and raw materials in mass percentage: 18% modified polyaspartic acid, 10% 3-acrylamido dopamine, and 12% pH regulator , 5% oxygen scavenger, 2% film-forming aid, and the balance is deionized water.

[0037] In the present embodiment, modified polyaspartic acid is polyaspartic acid modified by diethyl malonate, and the preparation method comprises the following steps:

[0038] 1) In a water solvent, react maleic anhydride and ammonium salt at 78°C for 1.5h, then raise the temperature to 175°C, and react for 1h to prepare polysuccinimide;

[0039] 2) Purify the polysuccinimide prepared in step 1), put the purified polysuccinimide in an alkaline aqueous solution, add diethyl malonate, react at 38°C for 15 hours, and then adjust The pH value of the system was adjusted to 5.8, then purified with 10 times the volume of absolute ethanol, stirred to obtain a reddish-br...

Embodiment 3

[0045] The phosphorus-free boiler water treatment agent in this example is prepared from the following components and raw materials in mass percentage: 25% modified polyaspartic acid, 15% 3-acrylamido dopamine, and 10% pH regulator , 4% oxygen scavenger, 6% film-forming aid, and the balance is deionized water.

[0046] In the present embodiment, modified polyaspartic acid is polyaspartic acid modified by diethyl malonate, and the preparation method comprises the following steps:

[0047] 1) In a water solvent, react maleic anhydride and ammonium salt at 78°C for 1.5h, then raise the temperature to 175°C, and react for 1h to prepare polysuccinimide;

[0048] 2) Purify the polysuccinimide prepared in step 1), put the purified polysuccinimide in an alkaline aqueous solution, add diethyl malonate, react at 38°C for 15 hours, and then adjust The pH value of the system was adjusted to 5.8, then purified with 10 times the volume of absolute ethanol, stirred to obtain a reddish-brown...

technical field

[0001] The invention belongs to the technical field of boiler water treatment, and relates to a phosphorus-free boiler water treatment agent and its preparation and application. Background technique

[0002] As we all know, the boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy and electric energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with certain heat energy. The hot water or steam generated in the boiler can directly provide the required heat energy for industrial production and people's life, and can also be converted into mechanical energy through a steam power device, or converted into electrical energy through a generator. However, in practical applications, under high temperature and high pressure environment, boiler water as an energy transfer medium, a small amount of colloid, calcium, iron and other impurities in the dissolved water are easy t...

Examples

Embodiment 1

[0027] The phosphorus-free boiler water treatment agent of this embodiment is prepared from the following components and raw materials in mass percentage: 24% modified polyaspartic acid, 12% 3-acrylamido dopamine, and 10% pH regulator , 4% oxygen scavenger, 3% film-forming aid, and the balance is deionized water.

[0028] In the present embodiment, modified polyaspartic acid is polyaspartic acid modified by diethyl malonate, and the preparation method comprises the following steps:

[0029] 1) In a water solvent, react maleic anhydride and ammonium salt at 75°C for 1h, then raise the temperature to 172°C, and react for 1h to prepare polysuccinimide;

[0030] 2) Purify the polysuccinimide prepared in step 1), put the purified polysuccinimide in an alkaline aqueous solution, add diethyl malonate, react at 36°C for 16 hours, and then adjust The pH value of the system was adjusted to 5.8, then purified with 10 times the volume of absolute ethanol, stirred to obtain a reddish-brow...

Embodiment 2

[0036] The phosphorus-free boiler water treatment agent of this embodiment is prepared from the following components and raw materials in mass percentage: 18% modified polyaspartic acid, 10% 3-acrylamido dopamine, and 12% pH regulator , 5% oxygen scavenger, 2% film-forming aid, and the balance is deionized water.

[0037] In the present embodiment, modified polyaspartic acid is polyaspartic acid modified by diethyl malonate, and the preparation method comprises the following steps:

[0038] 1) In a water solvent, react maleic anhydride and ammonium salt at 78°C for 1.5h, then raise the temperature to 175°C, and react for 1h to prepare polysuccinimide;

[0039] 2) Purify the polysuccinimide prepared in step 1), put the purified polysuccinimide in an alkaline aqueous solution, add diethyl malonate, react at 38°C for 15 hours, and then adjust The pH value of the system was adjusted to 5.8, then purified with 10 times the volume of absolute ethanol, stirred to obtain a reddish-br...

Embodiment 3

[0045] The phosphorus-free boiler water treatment agent in this example is prepared from the following components and raw materials in mass percentage: 25% modified polyaspartic acid, 15% 3-acrylamido dopamine, and 10% pH regulator , 4% oxygen scavenger, 6% film-forming aid, and the balance is deionized water.

[0046] In the present embodiment, modified polyaspartic acid is polyaspartic acid modified by diethyl malonate, and the preparation method comprises the following steps:

[0047] 1) In a water solvent, react maleic anhydride and ammonium salt at 78°C for 1.5h, then raise the temperature to 175°C, and react for 1h to prepare polysuccinimide;

[0048] 2) Purify the polysuccinimide prepared in step 1), put the purified polysuccinimide in an alkaline aqueous solution, add diethyl malonate, react at 38°C for 15 hours, and then adjust The pH value of the system was adjusted to 5.8, then purified with 10 times the volume of absolute ethanol, stirred to obtain a reddish-brown...