Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for recovering simple-substance phosphorus from sludge phosphorus via cross-flow membrane microfiltration and application for same

A technology of cross-flow membrane and recovery sheet, which is applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve problems such as complex process, incomplete pollution control, and low recovery rate of elemental phosphorus

Active Publication Date: 2013-07-24
CHENGDU INTERMENT TECH
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned methods either have a low recovery rate of elemental phosphorus, or have problems such as complicated processes and incomplete pollution control.

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

[0019] The method of recovering elemental phosphorus from sludge phosphorus through terminal membrane microfiltration, firstly, mix the sludge phosphorus raw material (the sludge phosphorus comes from the refining tank, the content of elemental phosphorus is 32%, and the total amount of sludge phosphorus to be treated is 200kg) with 80℃ heat mixed with water, so that the elemental phosphorus in it melts and settles under hot water heat preservation; then, only the melted sediment in the above mixture (in which the content of fine particles is 0.012%) is pumped into the terminal membrane microfiltration device to make it in 0.2Mpa Under the filtration pressure, the membrane element is filtered at a filtration temperature of 70°C. The membrane element uses a stainless steel porous material filter tube with a filtration accuracy of 15 μm; finally, the product that passes through the above membrane element is sent to the phosphorus receiving tank, and Elemental phosphorus is obtain...

Embodiment 2

[0021] The method of recovering elemental phosphorus from sludge phosphorus through terminal membrane microfiltration, firstly, mix the raw material of sludge phosphorus (sludge phosphorus comes from a refining tank, the content of elemental phosphorus is 32%, and the total amount of sludge phosphorus to be treated is 200kg) with 70°C heat Mixed with water, the elemental phosphorus in it melts and settles under hot water heat preservation, and at the same time, the pH value of the mixture is brought to 8; then, only the molten sediment in the above mixture (the content of fine particles is 0.008%) is pumped into the terminal membrane Microfiltration device, so that it is filtered by the membrane element at a filtration temperature of 60°C under a filtration pressure of 0.3Mpa. The membrane element uses an alumina ceramic porous filter tube with a filtration accuracy of 2 μm; finally, the above-mentioned The product of the membrane element is sent to the phosphorus receiving tan...

Embodiment 3

[0023] The method of recovering elemental phosphorus from sludge phosphorus through terminal membrane microfiltration, firstly, the raw material of sludge phosphorus (sludge phosphorus comes from a refining tank, the content of elemental phosphorus is 32%, and the total amount of sludge phosphorus to be treated is 200kg) is mixed with 65°C heat mixed with water, so that the elemental phosphorus in it melts and settles under hot water heat preservation, and at the same time, adds inorganic flocculant polymerized ferric aluminum sulfate to the mixture; then, only the molten sediment in the above mixture (the content of fine particles is 0.009%) It is pumped into the terminal membrane microfiltration device, so that it is filtered by the membrane element at a filtration temperature of 55°C under a filtration pressure of 0.2Mpa. The membrane element uses a TiAl porous material filter tube with a filtration accuracy of 4 μm; finally, the The product passing through the above membran...

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 recovering simple-substance phosphorus from sludge phosphorus via cross-flow membrane microfiltration, which is remarkably increased in the recovery rate of simple-substance phosphorus compared with the existing method. The invention further discloses a production process for yellow phosphorus, which omits a two-stage refining groove and an all sludge phosphorus pool compared with the existing process, so that lots of investment, manpower, water and energy consumption can be saved. The method for recovering simple-substance phosphorus from sludge phosphorus disclosed by the invention comprises the following steps of: firstly, mixing a sludge phosphorus raw material with hot water at 60-90 DEG C, so as to melt and settle simple-substance phosphorus in the sludge phosphorus raw material under the heat insulation of the hot water; secondly, only drawing the melted and settled substances in the mixture aforementioned in a cross-flow membrane microfiltration device, so as to filter the melted and settled substances by a membrane component at a filter temperature of 50-85 DEG C and under a filter pressure of 0.1-0.3 MPa; and finally, conveying the product passing through the membrane component aforementioned to a phosphorus-receiving tank, and settling at the bottom of the phosphorus-receiving tank to obtain simple-substance phosphorus, wherein the speed of the mixture flowing along the surface of the membrane component during filtering is controlled to be 0.01-0.5 m / s.

Description

technical field [0001] The invention relates to a method for recovering elemental phosphorus from sludge phosphorus and a yellow phosphorus production process using the method. Background technique [0002] Yellow phosphorus is a chemical product with high energy consumption, high material consumption and high pollution. The current yellow phosphorus production process is to put phosphate rock, coke and silica raw materials into the electric furnace for reaction in proportion, then spray and cool the furnace gas to obtain crude phosphorus, and then import the crude phosphorus into the refining tank for two-stage refining, and finally obtain Phosphorus products. A large number and variety of toxic and harmful substances will be produced in the above process, such as waste water, slag, yellow phosphorus tail gas, mud phosphorus, etc. From a circular economy perspective, these substances are useful by-products. At present, the comprehensive treatment and utilization of harmf...

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): C01B25/047
Inventor 高麟汪涛宿其
Owner CHENGDU INTERMENT TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com