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

River sediment resource utilization method

A river sediment and resource utilization technology, applied in chemical instruments and methods, sludge treatment, pyrolysis treatment of sludge, etc., can solve the problem of less river sediment, achieve resource utilization, and realize in-situ stabilization and harmless treatment, and the effect of solving the problem of sediment disposal

Active Publication Date: 2018-09-21
DONGHUA UNIV +1
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few studies on resource utilization of river sediment, and it is necessary to further expand its resource utilization direction

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
  • River sediment resource utilization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for resource utilization of river bottom mud, comprising the following steps:

[0024] (1) if figure 1 As shown, the river channel sediment produced by dredging and dredging of the river channel is placed in the concentration tank for gravity sedimentation and concentration, and the concentration of the sediment after concentration is 15g / L;

[0025] (2) Pump the concentrated bottom sludge into the hydrothermal closed reaction tank. The injection amount of the concentrated bottom sludge is 50% of the volume of the reaction tank. The steam heating method is used to seal and heat the sludge in the tank to a temperature of 180°C. Keep for 120min;

[0026] (3) The material after cooling is transported to the regulating tank, and treated by centrifugal dehydration to obtain hydrothermal liquid and hydrothermal solid products;

[0027] (4) The hydrothermal liquid adopts zero-valent iron Fenton to remove organic matter and heavy metals. The dosage of zero-valent iro...

Embodiment 2

[0030] A method for resource utilization of river bottom mud, comprising the following steps:

[0031] (1) if figure 1 As shown, the dredging and dredging sediment of the river channel is deposited and concentrated in the concentration tank, and the concentration of the sediment after concentration is 20g / L;

[0032] (2) pump the concentrated bottom sludge into the high-pressure closed reaction tank, the injection amount of the sludge is 70% of the volume of the high-pressure closed reaction tank, heat with heat transfer oil, and heat the sludge in the tank until the temperature of the tank is 180°C. Keep for 160min:

[0033] (3) After the reaction is completed, the material is cooled and unloaded to the regulating tank, and dehydrated by plate and frame filter press to obtain hydrothermal liquid and hydrothermal solid products.

[0034] (4) The hydrothermal liquid adopts zero-valent iron Fenton to remove organic matter and heavy metals. The dosage of zero-valent iron powder...

Embodiment 3

[0037] A method for resource utilization of river bottom mud, comprising the following steps:

[0038] (1) if figure 1 As shown, the spoiled sediment obtained by dredging the river channel is pumped into the concentration tank for sediment concentration, and the concentration of the concentrated sediment is 20g / L;

[0039] (2) pump the concentrated sludge into the hydrothermal closed reaction tank, the injection amount of the sludge is 80% of the volume of the carbonization reaction tank, and steam is heated to the temperature of the sludge in the tank to be 200°C, and kept for 200min;

[0040] (3) After the reaction is completed, the temperature is lowered, and the material is transported to the regulating tank, and dehydrated by plate and frame filter press to obtain hydrothermal liquid and hydrothermal solid products.

[0041] (4) The hydrothermal solution is treated with zero-valent iron Fenton, which is used for the removal of organic matter and heavy metals. The dosage ...

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
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a river sediment resource utilization method. River sediment is obtained and subjected to gravity sedimentation and concentration in a concentration pool; the concentrated sediment is conveyed to a hydrothermal closed reaction tank for a hydrothermal reaction; after the hydrothermal reaction is finished and the reaction mixed liquid is cooled, the reaction mixed liquid is discharged to a regulating tank, CaO is added, dehydration treatment is carried out, and a hydrothermal solution and a hydrothermal solid product are obtained through separation; a zero-valent iron Fenton reaction is carried out on the obtained hydrothermal solution, organic matter and heavy metals released in the hydrothermal liquid in the hydrothermal process are removed, and the treated water returns to a river channel water body; the obtained hydrothermal solid product is re-put into the river channel water body and is used for adsorbing nitrogen, phosphorus and the heavy metals in the water body, and the water-heat solid product can be enriched with microorganisms so as to further purify the water body. According to the method, the resource utilization of the sediment can be achieved while the river sediment is treated, little waste is generated, the operation is simple, and a feasible method is provided for the resource utilization of the river sediment.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for resource utilization of river bottom mud. Background technique [0002] In recent years, with the rapid development of industry, water bodies such as rivers and lakes have been severely polluted. Pollutants enter water bodies through atmospheric deposition, wastewater discharge, rainwater leaching and scouring, among which a large amount of refractory pollutants accumulate in the sediment of water bodies. and gradually enriched. Sediment mainly contains three types of pollutants. One is heavy metals, generally referring to Hg, As, Zn, Cu, etc., which have the characteristics of refractory, ecological toxicity, and accumulative properties. And deposited in the bottom mud; the second is organic matter, the toxic organic matter in the bottom mud reaches a higher concentration in the organism through enrichment, thereby producing a strong po...

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): C02F11/00C02F11/12C02F11/10C02F11/14C02F1/28C02F3/34C02F101/30C02F101/20C02F101/16
CPCC02F1/28C02F3/34C02F11/00C02F11/10C02F11/12C02F11/122C02F11/127C02F11/14C02F2101/105C02F2101/16C02F2101/20C02F2101/30C02F2103/007
Inventor 薛罡陈红李响张文启钱雅洁刘振鸿安婧姜明吉王麒张文娟汪钟凝
Owner DONGHUA UNIV
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