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A control system for energy balance of aluminum electrolyzer

An aluminum electrolytic cell and control system technology, applied in the field of electrolytic aluminum, can solve problems such as insufficient accuracy

Active Publication Date: 2021-09-14
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a control system for the energy balance of an aluminum electrolytic cell to solve or partially solve the technical problem of insufficient accuracy of the existing online judgment and adjustment method for the energy balance of an aluminum electrolytic cell

Method used

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  • A control system for energy balance of aluminum electrolyzer
  • A control system for energy balance of aluminum electrolyzer
  • A control system for energy balance of aluminum electrolyzer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] In this example, a temperature sensor is installed above 6 fire holes on a 300KA electrolytic cell. The temperature sensor is fixed on the outer wall of the shell casing. The line is connected to the controller at the flue end of the tank, and the controller is connected to the upper computer in the work area. The controller starts to collect the temperature of the sensor in real time from Huoyan 1, the sampling period is 1 second, and the shelling flag S=0; the collected temperature fluctuates around 140°C, and after filtering by the moving average, the characteristic value D is between -0.5 and 0.5 fluctuation. When the shelling hammer hits the shell surface of the fire eye and opens the fire eye, the controller collects a sudden change in temperature from 140°C to 150°C, calculates D=10, D is between the set values ​​[8,20], and the shelling mark S = 1; start recording the lowest temperature T1 = 140°C, t 1 = 1s, after 5 seconds it rises to the highest temperature ...

Embodiment 2

[0098] In this example, a temperature sensor is installed on the upper side of 6 fire holes on a 350KA electrolytic cell. The temperature sensor is fixed on the outer wall of the feeding pipe. It is connected to the controller at the flue end of the tank, and the controller is connected with the tank control machine. The controller starts to collect the temperature of the sensor in real time from Huoyan 1, the sampling period is 1 second, and the shelling flag S=0; the collected temperature fluctuates around 150°C, and after filtering by the moving average, the characteristic value D is between -1.0 and 1.0 fluctuation. When the shelling hammer hits the shell surface of the fire eye and opens the fire eye, the controller collects that the temperature changes from 150°C to 165°C, D=15, D is between the set value [10,20], and the shelling flag S=1 ;Start to record the lowest temperature T1=150°C, rise to the highest temperature 185°C after 5 seconds and then start to drop, reco...

Embodiment 3

[0100] In this example, an alarm light is installed on a 400KA electrolytic cell, and temperature sensors are installed above the six fire holes. The controller at the flue end of the electrolytic cell, the controller is connected to the upper computer, the tank control machine, and the alarm light on the tank at the same time. The controller starts to collect the temperature of the sensor in real time from Huoyan 1, the sampling period is 1 second, and the shelling flag S=0; the collected temperature fluctuates around 150°C, and after filtering by the moving average, the characteristic value D is between -1.0 and 1.0 fluctuation. When the shelling hammer hits the shell surface of the fire hole and opens the fire hole, affected by the adjacent fire hole, the temperature collected by the controller changes from 150°C to 153°C, and the characteristic value D=3, which is located at the preset set value [10,20] In addition, the shelling flag S=0; when the shelling flag S is 0 for...

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Abstract

The invention discloses a control system for the energy balance of an aluminum electrolytic cell, comprising: a temperature acquisition component for acquiring the temperature data of M fire holes on the aluminum electrolytic cell after shelling; Rate of change, to determine whether there is a blocked fire hole in the M fire holes in the selected time period; calculate the average temperature change rate K of each unblocked fire hole in the preset time interval after each shelling ij , and according to K ij Determined temperature change trend R for each unblocked firehole during the selected time period j ;according to R j Determine and output the heating stroke information or the cooling stroke information of the aluminum electrolytic cell; the second control component controls the energy balance of the aluminum electrolytic cell according to the aluminum electrolytic cell heating stroke information or the aluminum electrolytic cell cooling stroke information. The above control system can more timely and accurately feed back and adjust the energy balance state of the electrolyzer.

Description

technical field [0001] The present application relates to the technical field of electrolytic aluminum, in particular to a control system for energy balance of an aluminum electrolytic cell. Background technique [0002] The energy balance of the aluminum electrolytic cell is the key to the smooth operation of the electrolytic cell, and it is also the key to restricting the energy saving of the electrolytic cell. At present, the electrolytic cell has determined the control technology centered on superheat and reasonably matched with other process parameters. Due to the strong corrosiveness of high-temperature electrolytes, there is currently no probe capable of long-term on-line detection of electrolyte temperature. Currently, the temperature of the electrolyzer is checked off-line regularly every day, and the energy change trend of the electrolyzer is grasped through the tank temperature, and targeted adjustments are made to ensure energy balance. However, the off-line de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/20
CPCC25C3/20
Inventor 王跃勇邱仕麟张艳芳刘巧云周益文李琰韩莉
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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