Phosphoric acid production equipment and pipeline cleaning scale removal method

A technology for cleaning production equipment and pipes, applied in cleaning methods and utensils, cleaning methods using liquids, chemical instruments and methods, etc. The effect of improving operational efficiency

Inactive Publication Date: 2015-04-29
ANHUI NEW ZHONGYUAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method for cleaning and descaling phosphoric acid production equipment and pipelines, which can clean and descale equipment and delivery pipelines, and overcome manual cleaning and descaling time consuming flaws

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: earlier mass fraction is 98% aminotrimethylidene phosphoric acid 6kg, mass fraction is 98% phosphine carboxylic acid 6kg, mass concentration is 18% alkenyl sulfonic acid copolymer 65kg, mass concentration is 98% 65kg of multi-component copolymers, 50kg of acrylic acid-acrylate-sulfonate copolymer with a mass concentration of 58%, and 30g of a slow-release agent with a mass concentration of 100%, were mixed with water and stirred evenly to prepare 600kg of scale inhibitors; the prepared antiscalant In the scale agent, the mass fraction of aminotrimethylidene phosphoric acid is 2%, the mass fraction of phosphine carboxylic acid is 2%, the mass fraction of alkenyl sulfonic acid copolymer is 4%, the mass fraction of multi-polymer copolymer is 4%, acrylic acid-acrylate- The mass fraction of the sulfonate copolymer is 2%, and the mass fraction of the slow-release agent is 0.01%; the antiscalant is heated to 60°C and poured into the phosphoric acid equipment and ...

Embodiment 2

[0013] Embodiment 2 is earlier that mass fraction is 98% aminotrimethylidene phosphoric acid 12kg, mass fraction is 98% phosphine carboxylic acid 12kg, mass concentration is 130kg of alkenyl sulfonic acid copolymer of 18%, mass concentration is 98% 130kg of multi-component copolymer, 100kg of acrylic acid-acrylic acid ester-sulfonate copolymer with a mass concentration of 58%, 60g of a slow-release agent with a mass concentration of 100%, add water, mix and stir evenly, and prepare 600kg of scale inhibitor; the prepared scale inhibitor In the agent, the mass fraction of aminotrimethylidene phosphoric acid is 6%, the mass fraction of phosphine carboxylic acid is 6%, the mass fraction of alkenyl sulfonic acid copolymer is 8%, the mass fraction of multi-component copolymer is 4%, acrylic acid-acrylate-sulfonic acid The mass fraction of the salt copolymer is 2%, and the mass fraction of the slow-release agent is 0.02%; the scale inhibitor is heated to 80°C and poured into the phos...

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PUM

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Abstract

The invention discloses phosphoric acid production equipment and a pipeline cleaning scale removal method. According to the method, amino tri (methylene phosphonic acid), phosphono carboxylic acid, acrylamide-sodium allylsulfonate copolymers, multipolymers, crylic acid-acrylic ester-sulphonate copolymers and slow-release agents are adopted for preparing a scale inhibitor, the mass percent of the amino tri (methylene phosphonic acid) in the scale inhibitor is 2 percent to 6 percent, the mass percent of the phosphono carboxylic acid is 2 percent to 6 percent, the mass concentration of the acrylamide-sodium allylsulfonate copolymers is 4 percent to 8 percent, the mass concentration of the multipolymers is 4 percent to 8 percent, the mass concentration of the crylic acid-acrylic ester-sulphonate copolymers is 2 percent to 6 percent, and the mass percent of the slow-release agents is 0.01 percent to 0.02 percent; then, after the scale inhibitor is stirred and heated, the scale inhibitor is added into phosphoric acid equipment and a conveying pipeline, so that scale blocks are soaked by the scale inhibitor, and the scale blocks can be cleaned and removed. When the method is adopted, the scale block cleaning time is shortened, the cleaning cost is reduced, the operation efficiency of the device is improved, the configuration of the scale inhibitos is simple, and the use is convenient.

Description

technical field [0001] The invention relates to equipment and pipelines for phosphoric acid production, as well as a descaling method and a scale inhibitor, and more specifically, a method for descaling phosphoric acid production equipment and pipelines. Background technique [0002] It is well known that during the production process of dihydrate wet-process phosphoric acid, potassium, sodium, silicon and harmful impurities in phosphate rock are likely to cause fouling of filtration, concentration equipment and pipelines. The traditional descaling method uses manual cleaning. The scale is hard and difficult to clean, which seriously affects the normal production. Taking a company as an example, the traditional manual cleaning and descaling takes more than 120 hours for each cleaning. [0003] Since the formation of scales has a great relationship with the impurity content of phosphate rock, process indicators, pipeline materials, etc. also have a great impact on scaling,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B9/027B08B3/08B08B3/10
CPCB08B9/027C11D7/34C11D7/36
Inventor 盛恒
Owner ANHUI NEW ZHONGYUAN CHEM
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