Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preventing scaling in pipeline of phosphoric acid production equipment

An anti-scaling and equipment technology, applied in phosphoric acid, phosphorus oxyacid, chemical instruments and methods, etc., can solve the problems of a lot of manpower and material resources, phosphorus loss, affecting the start-up rate of the device, etc., to improve the operation rate and shorten the cleaning time. , easy to use effect

Inactive Publication Date: 2010-06-30
WENGFU (GRP) CO LTD
View PDF2 Cites 7 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: earlier with 3.2 tons of solid sodium lignosulfonate, 1.6 tons of solid sodium polyacrylate, add water and mix and stir evenly, be mixed with 160 tons of anti-scaling solution; Mass concentration of sodium lignosulfonate in the prepared anti-scaling solution The concentration of sodium polyacrylate is 2%, and the mass concentration of sodium polyacrylate is 1%. Then, after heating the anti-scaling solution to a temperature of 20°C, add it into the pipeline of phosphoric acid equipment, and run with the material.

Embodiment 2

[0011] Embodiment 2: 4 tons of sodium lignosulfonate and 2.4 tons of sodium polyacrylate were mixed with water and stirred evenly to prepare 160 tons of anti-scaling solution; the mass concentration of sodium lignosulfonate in the prepared anti-scaling solution was 2.5 tons %, the mass concentration of sodium polyacrylate is 1.5%; then, after heating the antiscalant to a temperature of 30°C, add it into the pipeline of the phosphoric acid equipment, and run with the material.

Embodiment 3

[0012] Example 3: 4.8 tons of sodium lignosulfonate as a solid substance and 3.2 tons of sodium polyacrylate as a solid substance were mixed with water and stirred evenly to prepare 160 tons of anti-scaling solution; the quality of sodium lignosulfonate in the prepared anti-scaling solution The concentration is 3%, and the mass concentration of sodium polyacrylate is 2%. After the scale inhibitor is heated to a temperature of 45°C, it is added into the pipeline of the phosphoric acid equipment, and it runs with the material.

[0013] After adopting this method, the running time of the concentration system is increased from 280 days / year to 300 days, and the production capacity of a single series is increased by 7000 tons / year.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preventing scaling in a pipeline of phosphoric acid production equipment, which comprises the following steps: preparing scaling preventing solution by mixing 2 to 3 mass percent of a surfactant sodium lignosulphonate and 1 to 2 mass percent of a dispersant polyacrylate sodium; and heating the scaling preventing solution and adding the scaling preventing solution into the pipeline of the phosphoric acid production equipment so that the scaling preventing solution can move along with materials, wherein temperature at which the scaling preventing solution is heated is 20 to 50 DEG C. By adopting the method of the invention, the operational cycle of a phosphoric acid concentration system is prolonged, the cleaning frequency of the pipeline of the phosphoric acid production equipment is also reduced, cleaning time is shortened and the operating radio of the equipment is improved. The scaling preventing solution in the method is simple to prepare and convenient to use.

Description

technical field [0001] The invention relates to equipment and pipelines for phosphoric acid production, and also relates to a scale inhibition method and a scale inhibitor, and furthermore, to a method for preventing scale formation in pipelines of 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] In the related prior art, th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F5/10C01B25/22
Inventor 郭世伟黄进杨毅张涛刘海冯克敏杨国行文慧姚石林吴松张天毅
Owner WENGFU (GRP) CO LTD