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

Deep dehydration device and dehydration method for sludge

A deep dehydration and sludge technology, applied in the direction of dehydration/drying/concentrated sludge treatment, etc., can solve the problems of large equipment damage, difficulty in accurately grasping shaft balance, and difficult maintenance, so as to reduce pollution and reduce the moisture content of sludge , the effect of easy operation

Inactive Publication Date: 2013-04-10
南京城建环保水务股份有限公司
View PDF3 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the biggest disadvantage of this equipment is: once a fault occurs, it is difficult to accurately grasp the balance of the shaft during maintenance, and the maintenance is very difficult. Once the balance deviation of the central shaft occurs, the damage to the equipment will be great
Overall analysis, the original dehydration equipment used in the water treatment market is not ideal

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
  • Deep dehydration device and dehydration method for sludge
  • Deep dehydration device and dehydration method for sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: as figure 1 and figure 2 As shown, a deep sludge dehydration device includes a thickening tank 1, a conditioning tank 2, and a membrane filter press 4. The thickening tank 1 is provided with a sludge inlet and an outlet, and the outlet of the thickening tank 1 and the inlet of the conditioning tank 2 pass through The pipes are connected, and the outlet of the conditioning tank 2 is connected to the diaphragm filter press 4 through the feed pump 3; a dosing device is provided above the conditioning tank 2, and the dosing device includes a first dosing device 5 and a second dosing device 6 And the third dosing device 7, wherein the first dosing device 5 is a PAM dosing device; the second dosing device 6 is a dosing device that calcium chloride, magnesium chloride and polyaluminum chloride mixture are housed; the third dosing device Device 7 is a calcium oxide dosing device.

[0030]The above-mentioned first dosing device 5 includes a medicine bin 51 , a h...

Embodiment 2

[0038] Embodiment 2: basically the same as Example 1, the difference is the addition of each medicament, specifically: the addition of PAM is 3% of the absolute dry sludge weight, polymerized AlCl 3 The addition amount is 2% of the dry sludge weight, CaCl 2 The amount of addition is 0.1% of the weight of absolute dry sludge, MgCl 2 The addition amount of CaO is 0.2% of the weight of the absolute dry sludge, and the amount of CaO is 0.2‰ of the weight of the absolute dry sludge. According to the method of this embodiment, the moisture content of the mud cake obtained after press filtration for 60 minutes was 55%.

Embodiment 3

[0039] Embodiment 3: basically the same as Example 1, the difference is the addition of each medicament, specifically: the addition of PAM is 6% of the absolute dry sludge weight, polymerized AlCl 3 The addition amount is 5% of the dry sludge weight, CaCl 2 The amount of addition is 0.5% of the weight of absolute dry sludge, MgCl 2 The addition amount of CaO is 0.5% of the weight of the absolute dry sludge, and the amount of CaO is 0.5‰ of the weight of the absolute dry sludge. According to the method of this example, the water content of the mud cake obtained after press filtration for 60 minutes was 57%.

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 deep dehydration device and a dehydration method for sludge. The device comprises a concentration tank, a conditioning tank and a membrane press filter that are sequentially connected, wherein a medicine adding device is arranged above the conditioning tank, and the medicine adding device is connected with the conditioning tank. The dehydration method comprises the steps of: delivering the sludge to the concentration tank for pretreating, delivering to the conditioning tank to be conditioned with a conditioning agent, delivering to the membrane press filter for filter-pressing, and accomplishing a deep dehydration process of the sludge after the filter-pressing is accomplished. The device and the method have the advantages that the problem that the dehydrated sludge is higher in water content can be solved; the water content of the sludge dehydrated by the device reaches below 60%; requirements of the existing environmental protection policy and a future trend are met; the problems that a transportation load of the sludge is large and the sludge leaks in a transportation process are solved; a foundation is laid for the subsequent drying and resourceful treatment and disposal; the operation is simple; and as CaO is added in a sludge conditioning step, the water content of the sludge can be reduced, the sludge can be sterilized, and environmental pollution caused by the subsequent disposal can be reduced.

Description

technical field [0001] The invention belongs to the technical field of domestic sludge deep dewatering, and in particular relates to a sludge deep dewatering device and a dewatering method. Background technique [0002] The traditional dewatering process and equipment for excess sludge in urban sewage treatment plants are generally belt filter presses, plate and frame filter presses and centrifugal filter presses. Among them, the application of belt filter press accounted for the largest proportion. The dehydration effect of the above-mentioned several traditional equipment on sludge is 70-80%, the transportation volume is relatively large, and it is easy to leak during transportation, which cannot meet the technical requirements of the current environmental protection policy. [0003] The types of mechanical dehydration can be divided into three categories: vacuum filtration dehydration, pressure filtration dehydration and centrifugal dehydration according to t...

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 周文军刘建军张爱均栾杰
Owner 南京城建环保水务股份有限公司
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