Method and device for rapidly reducing moisture content of sludge

A treatment method and water content technology, which is applied in the directions of dehydration/drying/thickened sludge treatment, pyrolysis treatment sludge, by-product vaporization, etc., can solve the difficulty of large-scale production, high risk of secondary pollution, and effectively kill problems such as extinction, to achieve the effects of easy large-scale treatment, making up for the long disposal cycle, and reducing secondary pollution

Inactive Publication Date: 2011-11-09
安徽合协生态环境科技有限公司
View PDF10 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, the above methods are only for the purpose of unilaterally reducing the moisture content of the sludge, the technical requirements are harsh, the large-scale production is difficult, and the process cannot be effectively guaranteed
Moreover, the above method has a high risk of secondary

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
  • Method and device for rapidly reducing moisture content of sludge
  • Method and device for rapidly reducing moisture content of sludge
  • Method and device for rapidly reducing moisture content of sludge

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1

[0040] 1. Firstly, the surplus sludge treated by the 2 tons of sewage treatment plant is introduced into the slurry reactor for chemical catalytic hydrolysis, and inorganic acid sulfuric acid is introduced through the guide pipe to control pH 5-6, control the reaction temperature (76℃-82℃), flash Steam and exhaust steam are mixed and preheated for pulping, steam and mechanical stirring are coordinated to carry out chemical catalytic hydrolysis reaction. In the pulping reactor, the organic matter is hydrolyzed by constant pressure steam to produce a large amount of organic acids, such as oxalic acid and lignin.

[0041] 2. Carry out the hydrolysis and cracking reaction of high temperature and high pressure hydrothermal dehydration, input the inorganic acid catalyst (such as sulfuric acid) and the generated slurry sludge and organic acid from the catalyst storage tank into the unreacted hydrolysis tank, from the sub-cylinder to the hydrolysis reaction Steam is inpu...

Example Embodiment

[0044] Example 2

[0045] A device for rapidly reducing the water content of sludge, comprising: a catalyst tank for arranging a catalyst, and a slurry reactor connected to the catalyst tank and reacting with the introduced sludge;

[0046] A high-temperature and high-pressure hydrolysis tank that is connected to the slurry reactor, the catalyst tank and the sub-cylinder to cause the sludge organic matter to undergo a chemical catalytic cracking reaction to generate small molecule carbides and nitrides;

[0047] The high-temperature and high-pressure hydrolysis tank is connected with a pressure relief tank for pressure relief and exhaust; the pressure relief tank is connected with a pair of hydrolyzed sludge for sedimentation and separation to generate solid materials and supernatant liquid.

[0048] The pressure relief tank is also connected to a slurry reactor through a waste heat economizer connected in the middle. In the slurry reactor, the organic matter is hydrolyzed under consta...

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 provides a rapid, economic and harmless processing method and device for reducing moisture content of sludge. In the invention, hydrolysis by atmospheric steam, hydrothermal dehydration at high temperature and high pressure and solid-liquid separation on materials are carried out to obtain a solid-liquid slurry, high moisture content of 80% can be reduced to low moisture content of 40%, and a hydrothermal separation process in sludge treatment can be rapidly achieved. The form of an organic matter in the sludge is changed, and phase change of water in the sludge can not be caused; compared with the prior art, the method provided by the invention can be used for overcoming the defects that the processing period is long and the processing energy consumption is high, and is easy for realization of large-scale processing and contributes to reducing secondary pollution to the environment and recycling resources; and a new approach is found for processing the sludge.

Description

technical field [0001] The invention relates to the field of solid waste treatment, in particular to a rapid hydrolysis treatment method and device for reducing the water content of urban sewage sludge and making the sludge harmless. Background technique [0002] Along with the sewage treatment process of the sewage treatment plant, a large amount of sludge is produced. For a long time, my country has tended to focus on sewage treatment and light sludge treatment. At present, my country's sludge treatment process has problems such as single technology, backward equipment level, low disposal guarantee rate, and high risk of secondary pollution. In addition, the existing sludge treatment process still has the disadvantages of high cost and long time. [0003] According to statistics, at present, urban sewage treatment plants in the country produce about 1.8 million tons of dry sludge (equivalent to 9 million tons of sludge with 80% water content) every year, and increase at ...

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): C02F11/10C02F11/12C02F11/14
CPCY02W10/40
Inventor 朱仁发
Owner 安徽合协生态环境科技有限公司
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