Method for dehydration and recycling of continuous dyeing sludge

A printing and dyeing sludge recycling technology, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., can solve the problems of printing and dyeing sludge environmental pollution, to eliminate pollution, Save floor space and achieve continuous effect

Inactive Publication Date: 2013-04-24
JIANGSU DONGYUAN TEXTILE SCI & TECH IND
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: to provide a continuous printing and dyeing sludge treatment method, which can realize the drying treatment and resource utilization of printing and dyeing sludge, thereby solving the problem of environmental pollution caused by printing and dyeing sludge

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 for dehydration and recycling of continuous dyeing sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] like figure 1 As shown, the continuous printing and dyeing sludge drying treatment and resource utilization method includes the following process steps: (1), dehydration: the printing and dyeing sludge with a moisture content of about 99% is introduced into the filter press through a sludge pump, and then Adding flocculant for dehydration, the flocculant is polyacrylamide with a concentration of 0.4‰, its addition amount is 6‰ of the dry sludge mass, and the moisture content of the printing and dyeing sludge after dehydration is 85%;

[0015] (2) Drying: The dehydrated printing and dyeing sludge is sent to the screw feeder through the conveyor belt, and then sent to the vertical screw drying tower by the rotary feeder for drying. The air duct tangentially enters the vertical spiral drying tower to ensure that the hot air volume is 18000m 3 / h, maintain the dynamic balance of the air intake, and the moisture content of the printing and dyeing sludge after drying is 30%;...

Embodiment 2

[0019] like figure 1 As shown, the continuous printing and dyeing sludge drying treatment and resource utilization method includes the following process steps: (1), dehydration: the printing and dyeing sludge with a moisture content of about 92% is introduced into the filter press through a sludge pump, and then Adding flocculant for dehydration, the flocculant is polyacrylamide with a concentration of 0.6‰, the amount added is 4‰ of the dry sludge mass, and the moisture content of the printing and dyeing sludge after dehydration is 80%;

[0020] (2) Drying: The dehydrated printing and dyeing sludge is sent to the screw feeder through the conveyor belt, and then sent to the vertical screw drying tower by the rotary feeder for drying. The tangential air inlet of the air duct leads into the vertical spiral drying tower to ensure that the hot air volume is 22000m 3 / h, maintain the dynamic balance of the air intake, and the moisture content of the printing and dyeing sludge afte...

Embodiment 3

[0024] like figure 1 As shown, the continuous printing and dyeing sludge drying treatment and resource utilization method includes the following process steps: (1), dehydration: the printing and dyeing sludge with a water content of about 95% is introduced into the filter press through a sludge pump, and then Adding a flocculant for dehydration, the flocculant is polyacrylamide with a concentration of 0.5‰, the amount added is 5‰ of the dry sludge mass, and the moisture content of the printing and dyeing sludge after dehydration is 83%;

[0025] (2) Drying: The dehydrated printing and dyeing sludge is sent to the screw feeder through the conveyor belt, and then sent to the vertical screw drying tower by the rotary feeder for drying. The tangential air inlet of the air duct leads into the vertical spiral drying tower to ensure that the hot air volume is 20,000m 3 / h, maintain the dynamic balance of the air intake, and the moisture content of the printing and dyeing sludge afte...

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
heating valueaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for the dehydration and recycling of continuous dyeing sludge. In the method, dehydration dyeing sludge of which the moisture content is between 80 and 85 percent is dried directly at one time to form dried sludge of which the moisture content is between 10 and 30 percent by adopting a mode of continuous dehydration, and the process is performed continuously in the state of whole sealing under slightly negative pressure to realize the continuous processing of the dyeing sludge and reduce the damage of unprocessed dyeing sludge to the environment to a maximum degree. Granules of the dried dyeing sludge have a heat value of combustion of between 1,500 and 2,000 kcal / kg, and after being mixed with coal, the dried dyeing sludge can be used as fuel to reduce coal consumption and cost.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for treating printing and dyeing sludge. Background technique [0002] Printing and dyeing sludge is solid and semi-solid waste generated from the treatment of printing and dyeing wastewater. It contains a large amount of organic matter, salts, pathogenic bacteria and pathogenic bacteria, and a small amount of heavy metals. It is easily corrupted and produces stench. Untreated printing and dyeing sludge After discharge, it will cause serious secondary pollution to the environment. The main disposal methods of sludge include landfill, composting, throwing into the sea, incineration, land utilization and resource utilization, etc. At present, most of the sludge is disposed of in landfill in China, and most of them are mixed with domestic waste. The disposal cost of sludge transported to landfill is about 100 yuan / ton. This disposal method will not only in...

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 Patents(China)
IPC IPC(8): C02F11/00C02F11/12C10L5/46
CPCY02E50/30Y02E50/10
Inventor 冯燕平王银银陈望坡石洪平陈庭春严维龙
Owner JIANGSU DONGYUAN TEXTILE SCI & TECH IND
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