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Scale inhibitor for phosphoric acid equipment pipeline

A scale inhibitor and equipment technology, which is applied in the field of scale inhibitor for wet process phosphoric acid equipment pipelines, can solve problems such as a lot of manpower and material resources, affecting the start-up rate of the device, phosphorus loss, etc., to improve the operation rate, expand the temperature range, use Convenient and economical effect

Active Publication Date: 2013-08-07
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Practice has proved that this method of cleaning and descaling not only takes a lot of time, but also requires a lot of manpower and material resources, which seriously affects the start-up rate of the device and causes phosphorus loss during the cleaning process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Taking the preparation of 10 tons of antiscalant liquid as an example, 0.01 tons of solid matter polyaminopolyether group methylene phosphonic acid, 0.03 tons of sodium dodecylbenzenesulfonate, 0.03 tons of sodium stearate, and sodium lignosulfonate The mass is 0.05 tons, the mass of sodium polyacrylate is 0.05 tons, mixed with water and stirred evenly, and the mass concentration of polyamino polyether group methylene phosphonic acid in the prepared scale inhibitor solution is 0.1%, sodium dodecylbenzene sulfonate is 0.3%, The mass concentration of sodium stearate is 0.3%, the mass concentration of sodium lignosulfonate is 0.5%, and the mass concentration of sodium polyacrylate is 0.5%.

[0012] After heating the antiscalant to a temperature of 20°C, add it into the pipeline of phosphoric acid equipment; the amount of antiscalant added is 0.3% of that of wet-process phosphoric acid.

Embodiment 2

[0014] Taking the preparation of 10 tons of antiscalant liquid as an example, 0.03 tons of solid matter polyamino polyether methylene phosphonic acid, 0.065 tons of sodium dodecylbenzenesulfonate, 0.055 tons of sodium stearate, and sodium lignosulfonate The quality is 0.15 tons, the quality of sodium polyacrylate is 0.125 tons, and water is mixed and stirred evenly. In the scale inhibitor solution prepared, the mass concentration of polyamino polyether methylene phosphonic acid is 0.3%, sodium dodecylbenzenesulfonate is 0.65%, The mass concentration of sodium stearate is 0.55%, the mass concentration of sodium lignosulfonate is 1.5%, and the mass concentration of sodium polyacrylate is 1.25%.

[0015] After heating the antiscalant to a temperature of 55°C, add it into the pipeline of the phosphoric acid equipment; the amount of the antiscalant added is 0.2% of that of the wet-process phosphoric acid.

Embodiment 3

[0017] Taking the preparation of 10 tons of antiscalant liquid as an example, 0.05 tons of solid matter polyaminopolyether group methylene phosphonic acid, 0.1 tons of sodium dodecylbenzenesulfonate, 0.08 tons of sodium stearate, and ligninsulfonic acid The quality of sodium is 0.25 tons, the quality of sodium polyacrylate is 0.2 tons, and water is added to mix and stir evenly. In the prepared scale inhibitor solution, the mass concentration of polyamino polyether methylene phosphonic acid is 0.5%, and sodium dodecylbenzenesulfonate is 1%. , the mass concentration of sodium stearate is 0.8%, the mass concentration of sodium lignosulfonate is 2.5%, and the mass concentration of sodium polyacrylate is 2.0%;

[0018] After heating the antiscalant to a temperature of 90°C, add it into the pipeline of the phosphoric acid equipment; the amount of the antiscalant added is 0.1% of the wet-process phosphoric acid.

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Abstract

The invention discloses a scale inhibitor for a phosphoric acid equipment pipeline, relating to the field of scale prevention. The scale inhibitor comprises the main components by mass percent: 0.1-0.5 percent of polyamino polyether methylene phosphonate, 0.3-1 percent of sodium dodecyl benzene sulfonate, 0.3-0.8 percent of sodium stearate, 0.5-2.5 percent of sodium lignin sulfonate and 0.5-2 percent of sodium polyacrylate. During use, the scale inhibitor is heated to the temperature of 20-90 DEG C and then is added into the phosphoric acid equipment pipeline. The addition of the scale inhibitor is 0.1-0.3 percent of phosphoric acid by a wet process. After the scale inhibitor is adopted, the operation cycle of a phosphoric acid concentration system is prolonged, the cleaning time is shortened, and the operating ratio of a device is increased. Moreover, the range of temperature application of the scale inhibitor is wider compared with the prior art, so that the scale inhibitor has a great application value.

Description

technical field [0001] The invention relates to scale prevention, in particular to a scale inhibitor suitable for pipelines of wet-process phosphoric acid equipment. Background technique [0002] As we all know, in the production process of wet-process phosphoric acid, due to the large amount of impurities contained in the raw material phosphate rock, the pipes of wet-process phosphoric acid equipment are prone to fouling. The scale formed in the pipeline of wet-process phosphoric acid equipment can only be cleaned and descaled by manual cleaning and cleaning solution. Practice has proved that this method of cleaning and descaling not only takes a lot of time, but also requires a lot of manpower and material resources, which seriously affects the start-up rate of the device and causes phosphorus loss during the cleaning process. [0003] The applicant once applied for the patent "A Method for Preventing Scaling of High-Concentration Wet-process Phosphoric Acid in Long-dista...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/14C01B25/235
Inventor 杨国行姚石林宋光辉
Owner WENGFU (GRP) CO LTD
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