Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for controlling flotation groove working

A flotation cell, working technology, applied in flotation, processing waste paper, papermaking, etc., can solve problems such as inflexibility

Inactive Publication Date: 2004-10-13
ANDRITZ AG
View PDF1 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A disadvantage of known control systems is that they are relatively inflexible
In particular, the known control systems make it difficult to achieve a favorable compromise between the quality of the accept leaving the flotation cell on the one hand and the energy input and potential loss of renewable material on the other hand

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 controlling flotation groove working

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The pulp for flotation flows into the liquid chamber 1 through the inlet 3 . The air added via the gas supply 6 leads to foam 2 which exceeds the height of the weir 5 . Air can be added via a compressor, automatic priming nozzles or the like.

[0026] Cleaned liquid leaves the device through outlet 4 .

[0027] The height position of the liquid is controlled by the control circuit 11 , and the height position of the foam is controlled by the control circuit 10 . Setpoints specific to the two height positions are obtained from the quality measurement system 12 which, depending on the application, measures lightness, dust speckle, number of adherents, or others in the accept leaving the flotation cell quality characteristics.

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

To control the operation of a flotation cell, especially for deinking used paper fiber suspensions, a control circuit (11) sets the liquid level in the cell suspension holding zone (1), and a control circuit (10) sets the foam (2) level. At least one quality characteristic is measured (12) in the cleaned suspension outflow (4) to set the nominal liquid and / or foam levels. The quality characteristic includes whiteness, brightness, color type, the number of soiled points and / or stickies.

Description

technical field [0001] According to the preamble of claim 1, the invention relates to a method for controlling the operation of a flotation cell. Background technique [0002] It is known that the operation of a flotation cell can be controlled by the height position of the liquid in the flotation cell, the amount of foam overflowed, the production rate, wherein the production rate is pre-defined as the desired production level. [0003] A disadvantage of known control systems is that they are relatively inflexible. In particular, the known control systems make it difficult to achieve a favorable compromise between the quality of the accept leaving the flotation cell on the one hand and the energy input and potential loss of renewable material on the other hand. [0004] DE4225117C1 gives a kind of control system, wherein in particular, measure the overflow height of froth in the froth channel of the main flotation cell, and according to this measured value control the quan...

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): B03D1/02B03D1/14D21B1/32D21C5/02D21F1/70
CPCB03D1/02B03D1/028D21B1/325B03D1/1406D21C5/025B03D1/24D21F1/70B03D1/14Y02W30/64
Inventor H·加布尔A·戈尔顿一许格尔斯E·赫尔特尔
Owner ANDRITZ AG