Phosphoric acid equipment pipeline scale inhibitor

A scale inhibitor and equipment technology, which is applied in the field of scale inhibitor for wet process phosphoric acid equipment pipelines, can solve the problems of phosphorus loss, affecting the start-up rate of the device, a lot of manpower and material resources, etc. rate 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

[0012] Taking the preparation of 12 tons of antiscalant liquid as an example, the mass of solid matter sodium dodecylbenzene sulfonate is 0.06 tons, the mass of sodium stearate is 0.036 tons, the mass of sodium lignosulfonate is 0.12 tons, and the mass of sodium polyacrylate is 0.18 tons. Mix and stir evenly, the mass concentration of sodium dodecylbenzenesulfonate in the prepared scale inhibitor solution is 0.5%, the mass concentration of sodium stearate is 0.3%, the mass concentration of sodium lignosulfonate is 1%, sodium polyacrylate The mass concentration is 1.5%.

[0013] 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 0.05% of that of wet-process phosphoric acid.

Embodiment 2

[0015] Taking the preparation of 12 tons of antiscaling liquid as an example, the mass of solid matter sodium dodecylbenzene sulfonate is 0.09 tons, the mass of sodium stearate is 0.066 tons, the mass of sodium lignosulfonate is 0.21 tons, and the mass of sodium polyacrylate is 0.21 tons. Mix and stir evenly, the mass concentration of sodium dodecylbenzenesulfonate in the prepared scale inhibitor solution is 0.75%, the mass concentration of sodium stearate is 0.55%, the mass concentration of sodium lignosulfonate is 1.75%, sodium polyacrylate The mass concentration is 1.75%.

[0016] After heating the antiscalant to a temperature of 50°C, add it into the pipeline of phosphoric acid equipment; the amount of antiscalant added is 0.04% of that of wet-process phosphoric acid.

Embodiment 3

[0018] Taking the preparation of 10 tons of antiscalant liquid as an example, the quality of solid matter sodium dodecylbenzene sulfonate is 0.1 tons, the quality of sodium stearate is 0.08 tons, the quality of sodium lignosulfonate is 0.25 tons, and the quality of sodium polyacrylate is 0.2 tons. Add water, mix and stir evenly, and the mass concentration of sodium dodecylbenzenesulfonate in the prepared antiscalant solution is 1.0%, the mass concentration of sodium stearate is 0.8%, the mass concentration of sodium lignosulfonate is 2.5%, and the mass concentration of polyacrylic acid The sodium mass concentration is 2.0%.

[0019] After heating the antiscalant to a temperature of 80°C, add it into the pipeline of phosphoric acid equipment; the amount of antiscalant added is 0.03% of that of wet-process phosphoric acid.

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PUM

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Abstract

The invention discloses a phosphoric acid equipment pipeline scale inhibitor and belongs to the field of scale prevention. The phosphoric acid equipment pipeline scale inhibitor is mainly composed of, by weight percentage, 0.5-1% of sodium dodecyl benzene sulfonate, 0.3-0.8% of sodium stearate, 1-2.5% of sodium lignin sulfonate and 1.5-2% of sodium polyacrylate. When in use, the scale inhibitor is heated to the temperature ranging from 20 DEG C to 80 DEG C and added in a phosphoric acid equipment pipeline, and addition amount of the scale inhibitor is 0.03-0.05% of phosphoric acid by wet process. By adopting the phosphoric acid equipment pipeline scale inhibitor, operation cycle of a phosphoric acid concentration system is prolonged, cleaning time is reduced, device operating rate is increased, and temperature application range of the scale inhibitor is wider than that of the prior art, so that the phosphoric acid equipment pipeline scale inhibitor has huge 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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