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Method and device for dewatering sludge on a screen

A slurry and screen technology, applied in chemical instruments and methods, dehydration/drying/thickened sludge treatment, water/sewage treatment, etc., can solve problems such as measurement distortion, inaccuracy, and failure to cause the minimum supply of flocculants, etc. achieve reliable results

Active Publication Date: 2016-12-14
ANDRITZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the measurements are largely distorted and inaccurate and cannot lead to a minimum supply of flocculant

Method used

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  • Method and device for dewatering sludge on a screen
  • Method and device for dewatering sludge on a screen
  • Method and device for dewatering sludge on a screen

Examples

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Embodiment Construction

[0022] figure 1 A dewatering installation 1 according to the invention is shown, which is shown here as a simple percolation table with a screen 2. For larger water volumes, additional basins and discharges can also be arranged, wherein the screen 2 can also be guided around additional rollers if necessary. For example, the present invention can also be implemented in the percolation zone of double belt compression. The slurry 3 is fed here by means of a slurry pump 4 to the material inlet 5 which is here configured as a chute. The required amount of flocculant is dosed into the slurry conveying line 6 through the flocculant pump 7. The screen 2 traveling in the direction 8 is cleaned by a cleaning nozzle 9 before reaching the entry area 10. Then, the slurry 3 is put on the cleaned screen 2. The control area is detected in the entry area 10 by the camera 11. For better recognition, a lighting element 12 is also provided. The camera 11 is connected to the flocculant pump 7 ...

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PUM

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Abstract

The invention relates to a method for the dewatering of sludge on a screen, wherein a flocculant is admixed with sludge, whereafter the sludge is at least partially dewatered, the flow behaviour of the sludge on the screen being optically detected and the amount of flocculant to be admixed being set according to the free screen surface in a control region. The invention is primarily characterized in that the control region is arranged at a point of the cleaned screen in the inlet area of the sludge, for example at the edge. The invention also relates to a device for the dewatering of sludge, comprising a flocculant feed device and a screen downstream of the flocculant feed device, wherein a device, in particular a camera, is provided for optically detecting the flow behaviour of the sludge and is connected via a control system to the flocculant feed device for regulating the amount of flocculant, said device being characterized in that the device (11), in particular the camera, is designed such that it detects a control region in the inlet area (10) of the cleaned screen. In this way, regulation can be achieved for an optimal feed amount of flocculant in a straightforward manner regardless of the material feed and the sludge type.

Description

Technical field [0001] The present invention relates to a method for dewatering a slurry on a screen, wherein a flocculant is mixed into the slurry, and then the slurry is at least partially dewatered, wherein the flow characteristics of the slurry at the screen are detected optically, and depends on Adjust the amount of flocculant to be mixed on the empty screen surface in the control area. The present invention also relates to a device for dewatering a slurry. The device has a flocculant conveying device and a screen placed behind the flocculant conveying device, wherein, in particular, the camera device is configured to control the flow characteristics of the slurry. Perform optical inspection and connect with flocculant delivery device via a control system to adjust the amount of flocculant. Background technique [0002] A method for dewatering a slurry is already known from the prior art, in which a slurry such as a sewage slurry or a fiber slurry is dewatered with the addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F11/121C02F11/14
CPCC02F11/121C02F11/14C02F1/5209C02F2303/24
Inventor 乌尔苏拉·霍赫格尔克里斯托夫·施皮尔曼
Owner ANDRITZ AG