CN1363728A

CN1363728A - Method and device for automatically measuring distribution of anode current in Al electrolyzer

Info

Publication number: CN1363728A
Application number: CN 01107037
Authority: CN
Inventors: 冷正旭; 黎云; 张煜; 龚春雷; 李世军; 陈代金; 罗跃辉; 邓三忠; 田维红; 陈雷
Original assignee: GUIZHOU ALUMINIUM PLANT
Current assignee: Aluminum Corp of China Ltd
Priority date: 2001-01-12
Filing date: 2001-01-12
Publication date: 2002-08-14
Anticipated expiration: 2021-01-12
Also published as: CN1158410C

Abstract

A method for automatically detecting the distribution of anode current in aluminium electrolyzer features that a detector is installed between the bottom of anode bus and electrolyzer plate and has two signal sampling points with a certain distance between them and is contact with anode, and the signals is transmitted from detector and sequentially through collecting module, A/D converter and computer. Its advantages include high accuracy and reliability, continuous detection and no environmental pollution.

Description

The automatic testing method of distribution of anode current in Al electrolyzer and device thereof

The present invention relates to a kind of automatic testing method and device thereof of distribution of anode current in Al electrolyzer.

At present, in existing Aluminium Electrolysis, measure the magnitude of voltage of aluminium cell anode, generally all be to adopt lead will measure rod to be connected with millivoltmeter, operator open the groove lintel plate of aluminium cell earlier, and two contacts that will measure rod again are near measuring point, from millivoltmeter, read magnitude of voltage then, this traditional detection method, its shortcoming is: 1, error is big, and accuracy of detection relies on operator's detection technique level fully; 2, data time-delay can not be carried out multiple spot and detect in real time to the anodic current of electrolyzer, reality generally all can only detect in 24 hours 1～2 time in producing, and the data that detected are not the data of each close time of measured point; 3, owing to be to detect on the electrolyzer side, labor intensity of operating personnel is big, therefore poor working environment can not be at short notice carried out the multiple spot inspection to the each several part of electrolyzer, therefore can not reasonably control the distribution situation of anodic current in Aluminium Electrolysis in real time; 4, owing to the groove lintel plate that need open aluminium cell detects, therefore reduced the airtight performance of groove cover, increased the thermosteresis of aluminium cell, and caused the increasing of secondary flue gas discharging (mainly being hydrogen fluoride gas) and dust, production environment has been polluted.

The objective of the invention is: provide a kind of and do not opening under the groove cover situation of electrolyzer, and do not need automatic testing method and the device thereof of operator at the other distribution of anode current in Al electrolyzer that just can detect in real time of electrolyzer to the anode voltage of aluminium cell, to overcome the deficiencies in the prior art.

Method of the present invention is such: it comprises that employing passes to the signal of proofing unit to gather and passes to analog-to-digital conversion module again behind the integration module and carry out analog-to-digital conversion process, and then its numerary signal is passed to computer handle, proofing unit is installed between the bottom of the big bus of aluminium cell anode and the groove lintel plate and locates, and proofing unit is provided with two sample of signal contacts separated by a distance, and these two sampling contacts contact with anode on the aluminium cell.

The device of Zhi Zuoing is according to the method described above: it comprises and utilizes existing aluminium cell (1), signals collecting integration module (2), analog-to-digital conversion module (3), computer (4), signals collecting integration module (2) output signal is arrived analog-to-digital conversion module (3), analog-to-digital conversion module (3) output signal is to computer (4), between the bottom of the anode large bus bar a of aluminium cell (1) and its groove lintel plate b, be provided with proofing unit (5), and proofing unit (5) is fixed on the anode large bus bar a, two sampling contact d separated by a distance are arranged on proofing unit (5), two sampling contact d contact with anode c on the electrolyzer (1), and the sampled signal on the contact d that takes a sample passes to the signal input part of signals collecting integration module (2) by lead (6); Proofing unit (5) is made up of sampling contact d, motion bar e, spring f, governing screw g, permanent sleeve h, support i and lock screw j, sampling contact d is contained in the front end of motion bar e by bearing pin, and motion bar e, spring f and governing screw g are contained in the permanent sleeve h, and permanent sleeve h and lock screw j are contained on the support i; Sampling contact d is the roller that has the sword dentation on the circumference.

Owing to adopted technique scheme, the present invention compares with existing aluminium cell anode voltage detecting technology, the present invention is not opening under the groove cover situation of electrolyzer, and do not need operator just can the anode voltage of aluminium cell to be detected in real time on the electrolyzer side, thereby avoided the existing in prior technology shortcoming, because testing of the present invention mainly is to contact with anode reliably by proofing unit, at any time all can take a sample from anode, and sampled signal passed to gather pass to analog-to-digital conversion module again behind the integration module and carry out analog-to-digital conversion process, and then its numerary signal is passed to computer handle, on the indicating meter of computer, form anodic current change curve chart demonstration intuitively, so the present invention has accuracy of detection and reliability is all high, not influenced by artificial factor, can be easily the production whole process of electrolyzer be detected uninterruptedly and controls, reduce labour intensity, free from environmental pollution, reduce thermosteresis, advantages such as save energy.

Accompanying drawing 1 is a structural representation of the present invention;

Accompanying drawing 2 is that the A of accompanying drawing 1 is to synoptic diagram;

Accompanying drawing 3 is the B portion enlarged diagram of accompanying drawing 1;

Accompanying drawing 4 is the shape synoptic diagram of sampling of the present invention contact d.

Embodiments of the invention: aluminium cell (1) can directly adopt existing aluminium cell, computer (4) preferably adopts the microcomputer more than 486, proofing unit (5) preferably uses high speed EIA RS-485 industrial communication network as network link with the link that is connected of computer (4), its signals collecting integration module (2), analog-to-digital conversion module (3) can adopt Taiwan to grind the product A DAM-5000 series distributed capture Controlling System series product of China (ADVANTACH) company, use Windows95 as service platform, with Visdaq3.11 configuration software construction system control software, during making, signals collecting integration module (2) output signal is received analog-to-digital conversion module (3), the output signal of analog-to-digital conversion module (3) is received computer (4), computer (4) can be placed in the watch-keeping cubicle away from electrolyzer, between the bottom of the anode large bus bar a of aluminium cell (1) and its groove lintel plate b, install proofing unit (5), proofing unit (5) is by sampling contact d, motion bar e, spring f, reconcile screw g, permanent sleeve h, support i and lock screw j form, its sampling contact d is contained in the front end of motion bar e by bearing pin, and motion bar e, spring f and governing screw g are contained in the permanent sleeve h, permanent sleeve h and lock screw j are contained on the support i, its sampling contact d is made as the roller that has the sword dentation on the circumference, proofing unit (5) is fixed on the anode large bus bar a by its lock screw j, when making proofing unit (5), note making two sampling contact d mounted thereto at intervals, two distances of taking a sample between the d of contact can be determined according to the working control needs, generally preferably be controlled between 5 centimetres to 30 centimetres, two sampling contact d are contacted with anode c on the electrolyzer (1), and make itself and anodic point of contact keep certain pressure by governing screw g, the sampled signal on the sampling contact d is passed to the signal input part of signals collecting integration module (2) by lead (6).

Claims

1, a kind of automatic testing method of distribution of anode current in Al electrolyzer, it comprises that employing passes to the signal of proofing unit to gather and passes to analog-to-digital conversion module again behind the integration module and carry out analog-to-digital conversion process, and then its numerary signal is passed to computer handle, it is characterized in that: proofing unit is installed between the bottom and groove lintel plate of the big bus of aluminium cell anode, and proofing unit is provided with two sample of signal contacts separated by a distance, and these two sampling contacts contact with anode on the aluminium cell.

2, a kind of distribution of anode current in Al electrolyzer automatic detection device, it comprises aluminium cell (1), signals collecting integration module (2), analog-to-digital conversion module (3), computer (4), signals collecting integration module (2) output signal is to analog-to-digital conversion module (3), analog-to-digital conversion module (3) output signal is to computer (4), it is characterized in that: between the bottom of the anode large bus bar a of aluminium cell (1) and its groove lintel plate b, be provided with proofing unit (5), and proofing unit (5) is fixed on the anode large bus bar a, two sampling contact d separated by a distance are arranged on proofing unit (5), two sampling contact d contact with anode c on the electrolyzer (1), and the sampled signal on the contact d that takes a sample passes to the signal input part of signals collecting integration module (2) by lead (6).

3, distribution of anode current in Al electrolyzer automatic detection device according to claim 2, it is characterized in that: proofing unit (5) is made up of sampling contact d, motion bar e, spring f, governing screw g, permanent sleeve h, support i and lock screw j, sampling contact d is contained in the front end of motion bar e by bearing pin, and motion bar e, spring f and governing screw g are contained in the permanent sleeve h, and permanent sleeve h and lock screw j are contained on the support i.

4, distribution of anode current in Al electrolyzer automatic detection device according to claim 3 is characterized in that: sampling contact d is the roller that has the sword dentation on the circumference.