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

Dewatered sludge curing agent and preparing method and using method thereof

A technology for dewatering sludge and solidifying agent, applied in the field of environmental engineering, can solve the problems of low dosage, difficult sludge reduction treatment, large capacity increase of sludge solidified body, etc. The effect of increasing the compressive strength

Active Publication Date: 2016-01-20
LIAONING TECHNICAL UNIVERSITY
View PDF8 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The amount of the existing dewatered sludge solidifying agent is generally between 15% and 30%, which leads to a relatively large increase in the volume of the solidified sludge, and it is difficult to achieve sludge reduction treatment. Therefore, there is an urgent need for a solidification and stabilization effect. Dewatered sludge solidifying agent with low dosage

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

[0023] The dewatered sludge solidifying agent in this embodiment is composed of phosphate rock, calcium carbide slag, tailings slag and marble slag, and the composition is phosphate rock: carbide slag: tailings slag: marble slag = 1:1:1:1 Mixing; wherein, the phosphorus grade of phosphate rock is 25%, and the Ca(OH) of carbide slag 2 The grade is 65%, and the particle size of phosphate rock, carbide slag, tailings slag and marble slag is ≦100 mesh.

[0024] The composition of phosphate rock is: 25% of fluorapatite, 19% of quartz, 50% of dolomite; the composition of calcium carbide slag is: 65% of calcium oxide, 12% of quartz, 2% of magnesium oxide, Aluminum 0.5%, ferric oxide 1%; tailings slag contains 42% of quartz, 5% of aluminum oxide and 7% of ferric oxide by mass percentage; marble slag contains calcium carbonate by mass percentage 50%, Quartz 9%, Alumina 25%.

[0025] The preparation method of the dewatered sludge solidifying agent of the present embodiment may further...

Embodiment 2

[0033] The dewatered sludge solidifying agent in this embodiment is composed of phosphate rock, carbide slag, tailings slag and marble slag, and the composition is phosphate rock: carbide slag: tailings slag: marble slag = 3:2:3:2 Mixing; wherein, the phosphorus grade of phosphate rock is 28%, and the Ca(OH) of carbide slag 2 The grade is 62%, and the particle size of phosphate rock, carbide slag, tailings slag and marble slag are all ≦100 mesh.

[0034] The composition of phosphate rock is: 22% of fluorapatite, 13% of quartz, 60% of dolomite; the composition of calcium carbide slag is: 62% of calcium oxide, 6% of quartz, 5% of magnesium oxide, Aluminum 1%, ferric oxide 1%; tailings slag contains 24% of quartz, 10% of alumina, 6% of ferric oxide; marble slag contains calcium carbonate 50% for quartz, 12% for quartz, and 24% for alumina.

[0035] The preparation method of the dewatered sludge solidifying agent of the present embodiment may further comprise the steps:

[0036...

Embodiment 3

[0043]The dewatered sludge solidifying agent in this embodiment is composed of phosphate rock, calcium carbide slag, tailings slag and marble slag, and the composition is phosphate rock: carbide slag: tailings slag: marble slag = 1:2:1:2 Mixing; wherein, the phosphorus grade of phosphate rock is 30%, and the Ca(OH) of carbide slag 2 The grade is 68%, and the particle size of phosphate rock, carbide slag, tailings slag and marble slag are all ≦100 mesh.

[0044] The composition of phosphate rock is: 29% of fluorapatite, 42% of quartz, 16% of dolomite; the composition of calcium carbide slag is: 65% of calcium oxide, 15% of quartz, 3% of magnesium oxide, Aluminum 0.6%, ferric oxide 2%; tailings slag contains 29% of quartz, 8% of aluminum oxide and 5% of ferric oxide by mass percentage; marble slag contains calcium carbonate by mass percentage 55% for quartz, 10% for quartz, and 25% for alumina.

[0045] The preparation method of the dewatered sludge solidifying agent of the pr...

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

PropertyMeasurementUnit
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Compressive strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a dewatered sludge curing agent and a preparing method and using method thereof and belongs to the technical field of environment engineering. The mass ratio of phosphate ore, carbide slag, tailing slag and marble slag in the dewatered sludge curing agent is (1-3) : (1-3) : (1-3) : (1-3). The preparing method comprises the steps of washing, drying, breaking and ball-milling phosphate ore, carbide slag, tailing slag and marble slag and then mixing phosphate ore, carbide slag, tailing slag and marble slag evenly in proportion. According to the using method of the dewatered sludge curing agent, dewatered sludge and the added dewatered sludge curing agent are evenly stirred in proportion to achieve curing. The compressive strength of cured dewatered sludge can reach 78 KPa after cured dewatered sludge is cured under a membrane for three days at normal temperature and normal pressure, and pH of leachate is 5-10. According to the dewatered sludge curing agent, solid waste is taken as the raw material, the sources of the raw material are wide, the cost of the raw material is low, and curing stability of dewatered sludge is realized by means of the chemical property of solid waste and mutual active excitation.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and in particular relates to a dewatered sludge solidifying agent, a preparation method and a use method. Background technique [0002] Sludge is a kind of viscous substance produced in the process of sewage treatment. It is mainly composed of aerobic and anaerobic microorganisms. A complex mixture of organic matter, metals, germs, insect eggs, colloids, etc. For sewage treatment plants in large cities, due to the large amount of industrial wastewater discharged into the system, the heavy metal content in sewage sludge is relatively high, and the content of lead, arsenic, and cadmium is often close to or exceeds the acceptance standard for sludge as agricultural compost The sludge discharged from the sewage treatment plant is generally a loose, colloidal paste with a water content of 80% to 90%. Very bad for handling and shipping. [0003] At present, the disposal technologie...

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): C02F11/14
Inventor 张树光王华庆孙闯
Owner LIAONING TECHNICAL UNIVERSITY
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