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A kind of room temperature phosphogypsum cleaning agent and its application

A technology of phosphogypsum and cleaning agent, applied in detergent compositions, non-surface-active detergent compositions, organic non-surface-active detergent compositions, etc. Sodium has problems such as corrosiveness, and achieves obvious synergistic effect, excellent scale inhibition effect, and anti-corrosion effect.

Active Publication Date: 2019-09-06
北京蓝星清洗有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current method usually adopted by manufacturers is pickling under pressure and heating or "alkali boiling + pickling". Neither of these two methods can be completely cleaned. Once the temperature of the cleaning equipment is not enough and the pressure is not enough, more serious fouling will appear during the cleaning process, with a thickness of more than 70mm, and it will be useless to use the old method at this time
In the prior art, Zhou Huabo's "Cleaning Method for Pipeline Scaling in Wet Process Phosphoric Acid Production Process" introduced "preparing sodium fluorosilicate mother liquor with sodium sulfate" as a pipeline cleaning method, but it still needs to be heated to 80 °C, and Sodium fluorosilicate is corrosive and cannot be directly used for cleaning metal pipes. There are certain restrictions on the use of pipe materials, and the waste liquid will cause industrial pollution after discharge.
And no relevant patents have been found to introduce the cleaning of this scale

Method used

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  • A kind of room temperature phosphogypsum cleaning agent and its application
  • A kind of room temperature phosphogypsum cleaning agent and its application
  • A kind of room temperature phosphogypsum cleaning agent and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Cleaning agent ratio: polyepoxysuccinic acid (molecular weight 1500) 7%, sodium gluconate 5%, polyaspartic acid (molecular weight 5000) 4%, N-maleyl-2-aminoethanesulfonic acid 2% , and the rest is water;

[0021] Liquid distribution tank: metal or plastic liquid storage tank;

[0022] Specific operation: at room temperature, cycle wash, stock solution, press figure 2 way to clean;

[0023] Cleaning effect: After 48 hours, the scale with a thickness of 50mm in the pipeline will all turn into white slime and be discharged with the liquid, and the pipeline will reveal its true color.

Embodiment 2

[0025] Cleaning agent ratio: polyepoxysuccinic acid (molecular weight: 1500) 6%, sodium tartrate 3%, citric acid 3%, glycine 2%, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid, the rest is water ;

[0026] Cleaning fluid container: plastic or metal reservoir;

[0027] Specific practical operation: at room temperature, remove the 25m long pipeline, immerse it in a cleaning pool of suitable size, soak it for 72 hours, and then rinse it with water;

[0028] Cleaning effect: 50mm of scale in the pipeline, after 72 hours, all become white muddy, and the pipeline reveals its true color.

[0029] In addition, the immersion cleaning comparison between the present invention and the existing cleaning agents is shown in Table 1

[0030] Table 1 Comparison of soaking and cleaning effects between the present invention and existing cleaning agents

[0031]

[0032] Remarks: The mass ratio of cleaning solution to scale is 15:1.

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Abstract

The invention relates to a normal-temperature phosphogypsum cleaning compound. The normal-temperature phosphogypsum cleaning compound is mainly prepared from organic carboxylic acids, glycine and a derivative thereof, a dispersant and water in a certain ratio. The raw materials of the cleaning compound are free of phosphorus and are environment friendly. When the cleaning compound is used at normal temperature, the removal rate of scale is 100%, and the cleaning compound has a corrosion rate of less than 0.1 g / m<2>.h in cleaning of pipelines made of carbon steel and the like and is free of corrosion to pipelines made of a PP material. The cleaning compound has a wide application scope and is also applicable to both cleaning of phosphogypsum and cleaning of complex sulfate scale simultaneously containing calcium carbonate, calcium silicate and the like.

Description

technical field [0001] The invention relates to a normal temperature phosphogypsum cleaning agent and its application, belonging to the field of industrial cleaning, in particular to cleaning of phosphogypsum scaling produced in phosphoric acid pipelines, and cleaning of complex sulfate scales containing calcium carbonate, calcium silicate and the like. Background technique [0002] In the process of preparing phosphoric acid and refining other chemical elements from phosphate ore to prepare chemical products, phosphate rock plants need sulfuric acid treatment. After that, the material flows through the pipeline, and scale will be deposited every day. The scale is block phosphogypsum ( figure 1 As shown, its main component is about 70% calcium sulfate, and the rest is Ca, Mg and other trace metal phosphates and silicates). If it is not washed for a few days, it will cause serious clogging. In such mining plants, the pipes are generally made of steel-plastic pipes, which are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11D7/26C11D7/32C11D7/34C11D7/60
Inventor 单素灵王双田黄俊博刘立军潘志强张利敏
Owner 北京蓝星清洗有限公司