Polyphosphoric acid production method using device for making acid from phosphorous slurry

A technology of polyphosphoric acid and mud phosphorus, applied in phosphorus oxo acid, condensed phosphoric acid and other directions, can solve the problems of weak market competitiveness, many application restrictions, low mud phosphoric acid, etc., achieves significant economic benefits, simplifies process flow, operation The effect of increasing the effect

Inactive Publication Date: 2017-06-20
YUNNAN TIANAN CHEM CO LTD
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low concentration of mud phosphoric acid, the application is more restricted, and the market competitiveness is weak, the device has been in a state of loss and is struggling

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polyphosphoric acid production method using device for making acid from phosphorous slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A new method of producing polyphosphoric acid using a mud phosphorus acid plant, sending mud phosphorus, a by-product of yellow phosphorus production, into the mud phosphorus tank, heating to 70°C to 80°C, stirring and mixing evenly, pumping into the nozzle in the combustion tower, and compressing Air atomization, oxidation reaction with excess combustion air of 2.0 times in the combustion tower and reburning tower to generate P 2 o 5 The high-temperature combustion gas of mud phosphorus and water steam, the temperature is controlled at 1100°C, enters the lower part of the hydration tower 2 through the inlet pipe 1 of the high-temperature combustion gas of mud phosphorus, and countercurrently hydrates the circulating phosphoric acid in the phosphoric acid spray pipe 3 to control the circulating spray The temperature of phosphoric acid is 80°C, the height of circulating phosphoric acid liquid level 4 and mud phosphorus high-temperature combustion gas inlet pipe 1 is cont...

Embodiment 2

[0013] A new method of producing polyphosphoric acid by using mud phosphorus acid production equipment, ..., oxidation reaction occurs in combustion tower and reburning tower with excess combustion air of 2.3 times, and generates phosphorus containing 2 o 5 The temperature of the high-temperature combustion gas and water vapor is controlled at 1150°C, ..., the temperature of the circulating acid spray is controlled at 90°C, and the height of the circulating acid liquid level 4 and the high-temperature combustion gas inlet pipe 1 of the sludge phosphorus is controlled to 500mm, ... The acid pipe 7 is directly connected to the circulating phosphoric acid pipe 6 at the outlet of the circulating pump 5, and after passing through the valve 8, phosphoric acid with a concentration of about 100% by weight is drawn out. The other content omitted is the same as that in Embodiment 1, and will not be repeated here.

Embodiment 3

[0015] A new method of producing polyphosphoric acid using a mud phosphorus acid plant, ..., and an oxidation reaction with an excess of 2.5 times the combustion air in the combustion tower and the reburning tower to generate P 2 o 5 The temperature of the high-temperature combustion gas with water vapor is controlled at 1200°C, ..., the temperature of the circulating phosphoric acid is controlled at 100°C, the height of the circulating acid liquid level 4 and the high-temperature combustion gas inlet pipe 1 of the sludge phosphorus is controlled to 400mm, ... The acid pipe 7 is directly connected to the circulating phosphoric acid pipe 6 at the outlet end of the circulating pump 5, and after passing through the valve 8, phosphoric acid with a concentration of about 105% by weight is drawn out. The other content omitted is the same as that in Embodiment 1, and will not be repeated here.

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 method of producing polyphosphoric acid by using the mud phosphorus acid production device, the mud phosphorus by-product of yellow phosphorus production is sent into the mud phosphorus tank, heated to 70-80°C, stirred and mixed evenly, pumped into the nozzle in the combustion tower, and compressed air mist oxidized in the combustion tower with an excess of 2.0 to 2.5 times of combustion-supporting air to generate P 2 o 5 Sludge phosphorus high-temperature combustion gas with water vapor at a temperature of 1100-1200 °C is sent to the lower part of the hydration tower to countercurrently hydrate with the circulating spray phosphoric acid, and the temperature of the circulating spray phosphoric acid is controlled at 80 °C-100 °C to control the circulating phosphoric acid The height of the liquid level and the mud phosphorus high-temperature combustion gas inlet pipe is 400-600mm, the tail gas temperature is below 90°C, and the weight percent concentration of 95%-105% phosphoric acid is directly drawn from the circulating acid pipeline. The present invention makes full use of the technology and equipment of the existing equipment for making acid from mud phosphorus to produce polyphosphoric acid, saves a lot of equipment investment, simplifies the process flow, and reduces energy consumption, and is especially suitable for the optimization and high-efficiency utilization of the existing equipment for making acid from mud phosphorus. , so that the value of the products produced by the existing devices will be greatly appreciated, the market will be widely used, and the economic benefits will be significant.

Description

technical field [0001] The invention relates to a new method for producing polyphosphoric acid using a mud phosphorus acid production device. [0002] technical background [0003] When the phosphorus chemical industry produces industrial yellow phosphorus, it will produce about 10% of mud phosphorus (main components are P4: 40-50%, H2O: 40-50%, solid impurities: 6-10%), mud phosphorus It is a kind of dangerous solid waste. The safe and environmentally friendly treatment method in the prior art is a mud phosphorus acid production device imported from Russia in Yunnan, which is specially used to consume the by-product mud phosphorus in the production of yellow phosphorus (the device It belongs to the environmental protection facility that must be operated synchronously with the main device of yellow phosphorus production), which sends the by-product mud phosphorus in the yellow phosphorus production into the mud phosphorus tank and heats it to 70-80°C, stirs and mixes evenly, ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/24
CPCC01B25/24
Inventor 郝智明禹武杜建学段树平
Owner YUNNAN TIANAN CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap