CN105546981A - Production and calcination system of carbon anode for aluminium electrolysis and process control method of system - Google Patents
Production and calcination system of carbon anode for aluminium electrolysis and process control method of system Download PDFInfo
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- CN105546981A CN105546981A CN201610093336.6A CN201610093336A CN105546981A CN 105546981 A CN105546981 A CN 105546981A CN 201610093336 A CN201610093336 A CN 201610093336A CN 105546981 A CN105546981 A CN 105546981A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/08—Cell construction, e.g. bottoms, walls, cathodes
- C25C3/12—Anodes
- C25C3/125—Anodes based on carbon
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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Abstract
The invention discloses a production and calcination system of a carbon anode for aluminium electrolysis and a process control method of the system. The calcination system comprises a recycle calciner unit including a plurality of furnace chambers, at least one flame control unit including multiple types of control racks and a hanging beam device used for moving the flame control unit, wherein each furnace chamber comprises a plurality of open-top material boxes which are arranged side by side; a sealed flame path is arranged on each of both sides of each open-top material box; each flame control unit controls 20/22 furnace chambers within each flame control period and moves forwards by one furnace chamber at the end of each flame control period. The calcination system has the advantages of being simple in structure, low in cost and high in finished product ratio. According to the process control method of the system, the flue gas temperature of branch pipes of exhaust racks (ER) is controlled to be 420-480 DEG C, and the airflow negative pressure controlled by zero pressure racks (ZPR) is minus 4-0 pa; the advantages of high production efficiency, simple and convenient operation and high safety and reliability are achieved, the production rate can be effectively improved by 15% or higher, and the fuel consumption can be reduced by 10%-25%.
Description
Technical field
The present invention relates to a kind of production system of carbon anode, particularly relate to a kind of production roasting system of carbon anode used for aluminium electrolysis, and utilize this roasting system to carry out the process control method of carbon anode roasting.
Background technology
The roasting process of carbon anode is exactly binding agent---and pitch charing becomes the heat treatment process of coke anode.Make the pitch between carbon particles be transformed into the coke film of solid by roasting, carbon particles is connected into have the entirety of certain mechanical strength and physics, chemical property.The quality and quantity that pitch becomes coke directly affects end properties.In carbon anode roasting process, to the decomposition and aggregation reaction of series of complex be there is in the pitch in green compact, its change procedure is broadly divided into double teacher: (1) is increased to the process of 200 DEG C from room temperature, green compact soften, pitch is wherein in mecystasis and presents and flows slowly and spread, and volume slightly expands.(2) between 200 DEG C ~ 300 DEG C, the compositions such as moisture, carbon dioxide, carbon monoxide and light oil discharged gradually by green compact, and carry out partial polycondensation reaction.(3) between 300 DEG C ~ 500 DEG C, pitch generation quick decomposition reaction, discharges fugitive constituent in a large number, simultaneously with a small amount of polymerisation.Being unlikely to undue fierceness for making the discharge of fugitive constituent causes goods to crack, and the heating rate of this one-phase should slow down.(4) when temperature reaches more than 500 DEG C, polymerization reflection is accelerated, and pitch coking forms pitch coke; When 750 DEG C ~ 800 DEG C, the polymerisation of pitch completes substantially, but still has part fugitive constituent to discharge, and the heating rate of this one-phase can not be too fast; (5) in 800 DEG C of later roasting process, be that foreign atom and group are separated from the large molecule of the coke generated, and molecular structure is rearranged, make coking perfect further, this stage heating rate can be accelerated.
Because the intensity of carbon in the phenyl ring of pitch-other interatomic bonds of carbon bond strength ratio is large many, therefore when pitch generation thermal decomposition, first foreign atom such as hydrogen, oxygen etc. react, with the micromolecular volatile matter effusion such as H2, CO2, CO, CH1, the elements such as nitrogen, sulphur, boron then according to the combining form of they and carbon, are separated out or are stayed in coke.The thermal decomposition of molecule will produce unsaturated bonding force at breaking part, and their can separate foreign atom or group at higher temperatures, then with other unsaturated molecule aggregations.Aggregation is nonvolatile residue and forms the huge planar molecule of layering gradually, i.e. pitch coke by the molecule be connected firmly.Due to the non-localized key effect of interlayer, the coke that the polycondensation reaction more than 800 DEG C obtains, its electrical conductivity and thermal conductivity will sharply increase.The coking of pitch in green compact in roasting process is carried out on solid carbonaceous surface, has the feature of oxidative dehydrogenation polycondensation.In material base kneading process, solid carbonaceous particle surface adsorbs the gases such as aerobic, nitrogen, carbon dioxide, carbon monoxide all to some extent, the gas molecule of absorption has the activity of carrying out oxidation-reduction reaction with asphaltene molecule, the formation of cross key between carbon particles surface and pitch can be promoted, and make it to be solidified togather, thus the density of fired article and intensity are all improved.
Heating rate is to the binding agent in green compact---and the density analysing burnt amount and coking of pitch has a great impact.When programming rate is slow, pitch has time enough to carry out being polymerized and decomposition reaction, and analyse burnt amount and increase, coking density is also large, therefore can improve density and and the machine commandment intensity of goods.Meanwhile, because thermo parameters method in roasting system is comparatively even when programming rate is slow, can prevent goods from roasting process, occurring crackle.In roasting process, the homeostasis process that the decomposition of asphalt component and polymerisation are reciprocal in a pair, because decomposition reaction is endothermic process, polymerisation is exothermic process, therefore intensification can make poised state carry out to decomposition direction, and cooling makes reaction carry out to direction of polymerization.Sintering temperature is the important indicator representing anode heat-treated degree size, and the series of physical chemical properties such as machine commandment intensity, porosity, ratio resistance, counter electromotive force, gas pickling speed and the electrolysis unit consumption of its antianode have important impact.Therefore adopt optimum roasting system, have vital effect to the end product quality improving carbon anode.
But current carbon anode is produced roasting system and be there is the problem that utilization rate of waste heat is low, production cost is high, security is low, the roasting system of 54 furnace chambers as shown in Figure 1, configure 3 cover flame control units altogether, often overlap flame control unit and control 18 furnace chambers in a flame control cycle, and after each flame control cycle terminates, move forward a furnace chamber, to circulate baked for producing.Its furnace chamber and furnace chamber are separated by partition wall and arranged in parallel along main shaft, each furnace chamber is made up of the closed quirk of multiple uncovered hopper and correspondence, the quirk that adjacent furnace chamber is corresponding is communicated with through bulkhead, can insert push-pull valve for cutting off the quirk path between adjacent furnace chamber in partition wall.During production roasting, green anode is loaded the uncovered hopper separated by hollow flue wall, and to cover above anode with inserts blind.From a furnace chamber to another furnace chamber, many independences can be formed along roaster by partition wall quirk and the quirk of circulation.The upper side wall of each quirk that each furnace chamber is corresponding is all provided with four combustion measurement holes able to turn on or off, for measuring the temperature and pressure in this place's quirk, to carry out state modulator.18 furnace chambers are controlled with regard to the existing flame control unit that often overlaps, for meeting the process conditions of carbon anode roasting, each flame control cycle at least needs 28 hours, have very to reaching 36 hours, production efficiency is lower, and the arm flue-gas temperature general control of its smoke discharge frame ER is at about 550 DEG C, on the one hand because the furnace chamber between high-temp combustion frame HR3 to smoke discharge frame ER is less, make utilization rate of waste heat lower, energy waste is more, also make each furnace chamber between high-temp combustion frame HR3 to smoke discharge frame ER heat up relatively very fast simultaneously, carbon anode finished product is easily caused to occur crackle, affect quality and yield rate.On the other hand, because the temperature of smoke discharge frame (ER) flue gas is higher, the pressure of subsequent purification treatment process is comparatively large, and security is lower easily draws fire incident.
Summary of the invention
The object of this invention is to provide a kind of production roasting system and process control method thereof of carbon anode used for aluminium electrolysis, described roasting system has the advantage that structure is simple, with low cost, yield rate is high, described process control method has high, easy and simple to handle, the safe and reliable advantage of production efficiency, adopt the present invention can effectively boost productivity more than 15%, and reduce fuel consumption 10 ~ 25%.
Low for solving its production efficiency of carbon anode roasting system of the prior art, utilization rate of waste heat is low, fuel consumption is higher, and easily there is the problem of cracks influence end product quality, the invention provides the production roasting system of the carbon anode used for aluminium electrolysis of two kinds of versions, wherein a kind of production roasting system of carbon anode used for aluminium electrolysis, comprise the circulating roaster unit be made up of multiple furnace chamber, the at least a set of flame control unit be made up of various control frame, and for the lifting beam device of control cage in movable flame control unit, each furnace chamber includes the multiple uncovered hopper be arranged side by side, the both sides of each hopper are equipped with closed quirk and make only to arrange a quirk between two adjacent hoppers, the upper side wall of every bar quirk is equipped with along its length four uniform combustion measurement holes, combustion measurement hole is communicated with the inner chamber of quirk and is provided with capping, be provided with partition wall between two adjacent furnace chambers and the corresponding quirk of adjacent furnace chamber is interconnected through partition wall, the push-pull valve for cutting off or open corresponding quirk between adjacent furnace chamber is provided with in partition wall, often overlap flame control unit and include smoke discharge frame ER, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR,
Wherein: often overlap flame control unit and in a flame control cycle, control 20 furnace chambers and move forward a furnace chamber after each flame control cycle terminates, described 20 furnace chambers are followed successively by the raw block furnace chamber of prepackage to downstream along flame moving direction from upstream, go out ripe piece of furnace chamber, first comes out of the stove cooling furnace chamber in advance, second comes out of the stove cooling furnace chamber in advance, first cooling furnace chamber, second cooling furnace chamber, 3rd cooling furnace chamber, 4th cooling furnace chamber, 5th cooling furnace chamber, 6th cooling furnace chamber, 7th cooling furnace chamber, high-temperature roasting furnace chamber, intensification furnace chamber, medium temperature roast furnace chamber, low-temperature bake furnace chamber, first preheating preheating furnace chamber, second preheating furnace chamber, 3rd preheating furnace chamber, 4th preheating furnace chamber and sealing furnace chamber, described smoke discharge frame ER is erected at the upside of the 4th preheating furnace chamber and is in downstream, thermometric rack of measuring pressure TPR is erected at the upside of the 3rd preheating furnace chamber and is in downstream, low-temperature burning frame HR1 is erected at the upper middle side part of the 3rd roasting furnace chamber, middle temperature burning rack HR2 is erected at the upper middle side part of the second roast furnace chamber, high-temp combustion frame HR3 is erected at the upper middle side part of the first roasting furnace chamber, zero-pressure frame ZPR is erected at the upside of the 7th cooling furnace chamber and is in downstream, air blast frame BR is erected at the upper middle side part of the 4th cooling furnace chamber, cooling frame CR is erected at the upper middle side part of the first cooling furnace chamber.
Compared with the production roasting system of the carbon anode used for aluminium electrolysis of this version of the present invention produces roasting system with existing carbon anode, a preheating furnace chamber is added in the downstream of low-temperature bake furnace chamber, and between high-temperature roasting furnace chamber and medium temperature roast furnace chamber, add an intensification furnace chamber, make preheating zone furnace chamber and roast area furnace chamber become four by three.The list cover flame control unit of this version, owing to extending from the distance the highest high-temp combustion frame HR3 to smoke discharge frame ER of temperature, can make full use of waste heat to reduce energy consumption on the one hand, practical application shows to adopt the present invention can reduce fuel consumption 10 ~ 25%.The programming rate of each furnace chamber between the two can be made to slow down because distance extends simultaneously, avoid the phenomenon that crackle appears in finished product, thus improve yield rate and product quality.On the other hand, correspondingly can shorten the time of flame control cycle, thus enhance productivity, adopt the production roasting system of the carbon anode used for aluminium electrolysis of version of the present invention, the time of flame control cycle can be made minimumly to foreshorten to 24 hours, enhance productivity more than 15%.In addition, adopt the production roasting system of carbon anode used for aluminium electrolysis of the present invention, the temperature of smoke discharge frame ER arm flue gas can be made to control at 420 DEG C ~ 480 DEG C, 70 DEG C ~ 130 DEG C are reduced compared to 550 DEG C of traditional carbon anode production roasting system, reduce the pressure of subsequent purification treatment system, improve security simultaneously, reduce the probability of breaking out of fire.
The production roasting system of another kind provided by the invention carbon anode used for aluminium electrolysis, comprise the circulating roaster unit be made up of multiple furnace chamber, the at least a set of flame control unit be made up of various control frame, and for the lifting beam device of control cage in movable flame control unit, each furnace chamber includes the multiple uncovered hopper be arranged side by side, the both sides of each hopper are equipped with closed quirk and make only to arrange a quirk between two adjacent hoppers, the upper side wall of every bar quirk is equipped with along its length four uniform combustion measurement holes, combustion measurement hole is communicated with the inner chamber of quirk and is provided with capping, be provided with partition wall between two adjacent furnace chambers and the corresponding quirk of adjacent furnace chamber is interconnected through partition wall, the push-pull valve for cutting off or open corresponding quirk between adjacent furnace chamber is provided with in partition wall, often overlap flame control unit and include smoke discharge frame ER, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR,
Wherein: often overlap flame control unit and in a flame control cycle, control 22 furnace chambers and move forward a furnace chamber after each flame control cycle terminates, described 22 furnace chambers are followed successively by the raw block furnace chamber of prepackage to downstream along flame moving direction from upstream, go out ripe piece of furnace chamber, first comes out of the stove cooling furnace chamber in advance, second comes out of the stove cooling furnace chamber in advance, first cooling furnace chamber, second cooling furnace chamber, 3rd cooling furnace chamber, 4th cooling furnace chamber, 5th cooling furnace chamber, 6th cooling furnace chamber, 7th cooling furnace chamber, 8th cooling furnace chamber, 9th cooling furnace chamber, high-temperature roasting furnace chamber, intensification furnace chamber, medium temperature roast furnace chamber, low-temperature bake furnace chamber, first preheating preheating furnace chamber, second preheating furnace chamber, 3rd preheating furnace chamber, 4th preheating furnace chamber and sealing furnace chamber, described smoke discharge frame ER is erected at the upside of the 4th preheating furnace chamber and is in downstream, thermometric rack of measuring pressure TPR is erected at the upside of the 3rd preheating furnace chamber and is in downstream, low-temperature burning frame HR1 is erected at the upper middle side part of the 3rd roasting furnace chamber, middle temperature burning rack HR2 is erected at the upper middle side part of the second roast furnace chamber, high-temp combustion frame HR3 is erected at the upper middle side part of the first roasting furnace chamber, zero-pressure frame ZPR is erected at the upside of the 9th cooling furnace chamber and is in downstream, air blast frame BR is erected at the upper middle side part of the 5th cooling furnace chamber, cooling frame CR is erected at the upper middle side part of the first cooling furnace chamber.
The production roasting system of the carbon anode used for aluminium electrolysis of the second version of the present invention, compared with the first version, increase two furnace chambers in cooling zone and made two furnace chambers be in the both sides of air blast frame BR, this structure makes the furnace chamber between air blast frame BR and high-temp combustion frame HR3 fully can be heated by blower fan and sends into air themperature in quirk, make burning more abundant, further increase utilization rate of waste heat, reduce energy consumption.
In the production roasting system of the carbon anode used for aluminium electrolysis of more than the present invention two kinds of versions, wherein smoke discharge frame ER, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, identical all with existing carbon anode roasting system of the configuration of air blast frame BR and cooling frame CR and effect, smoke discharge frame ER is for controlling flue gas flow and the temperature of each quirk, and comprise smoke evacuation support, many the arms of discharging fume that smoke evacuation house steward and two ends are communicated with each quirk with smoke evacuation house steward respectively, each bar smoke evacuation arm is all provided with flue gas flow control valve, smoke discharge frame control section is provided with negative pressure transmitter and temperature thermocouple, thermometric rack of measuring pressure TPR measures support and the temperature thermocouple be arranged in each quirk and load cell for measuring the flue-gas temperature and negative pressure that enter the 4th preheating furnace chamber and comprising, low-temperature burning frame HR1, middle temperature burning rack HR2 and high-temp combustion frame HR3 comprise combustion supporter, switch board and the temperature thermocouple be arranged in each quirk and the fuel oil that matches with quirk or fire vapour pulse control valve respectively, zero-pressure frame ZPR comprises zero-pressure support and is arranged at the pressure sensor in each quirk, and pressure sensor is connected with the switch board of high-temp combustion frame HR3, air blast frame BR is for regulating the blow rate required of each quirk, and the blast pipe comprising air blast support and be communicated with each quirk, the porch of each blast pipe is respectively equipped with frequency conversion fan, cooling frame CR is for regulating the cooling air quantity of each quirk, and the cooling duct comprising cooling holder and be communicated with each quirk, each cooling duct is provided with constant speed blower fan and control valve.
The invention provides and additionally provide a kind of process control method utilizing the production roasting system of carbon anode used for aluminium electrolysis to carry out carbon anode production roasting, comprise preroast operation and circulation calcining process two processes:
Preroast operation comprises:
One, in all hoppers of each furnace chamber, load green anode blank, use inserts blind and cover green anode blank;
Two, set up the smoke discharge frame ER in flame control unit, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR respectively, and connect corresponding observing and controlling parts;
Three, for often overlapping flame control unit, in a flame control cycle, by inserting each quirk path that push-pull valve cuts off the 4th preheating furnace chamber and seals between furnace chamber, and make to be communicated with from each article of quirk between the raw block furnace chamber to the 4th preheating furnace chamber of prepackage; By air blast frame BR, air is sent into each quirk; In each quirk, spray into the fuel oil of requirement or combustion gas so that the gas flow temperature of this place's quirk is risen to setting value by the controllable pulse valve on high-temp combustion frame HR3, to heat high-temperature roasting furnace chamber, residual heat stream is to intensification furnace chamber; In each quirk, spray into the fuel oil of requirement or combustion gas so that the gas flow temperature of this place's quirk is risen to setting value by the controllable pulse valve on middle temperature burning rack HR2, to heat medium temperature roast furnace chamber, residual heat stream is to low-temperature bake furnace chamber; In each quirk, the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk is risen to setting value by the controllable pulse valve on low-temperature burning frame HR1, to heat low-temperature bake furnace chamber, waste heat flows to the first preheating preheating furnace chamber, the second preheating furnace chamber, the 3rd preheating furnace chamber and the 4th preheating furnace chamber successively and discharges from smoke discharge frame ER; And entered gas flow temperature and the negative pressure value of each quirk of the 4th preheating furnace chamber by thermometric rack of measuring pressure TPR measurement, so that regulate the flue gas delivery flow of each quirk in smoke discharge frame ER place; Accurately measured the stream pressure value of each quirk in high-temperature roasting furnace chamber upstream by zero-pressure frame ZPR, to regulate air blast frame BR place to send into the air mass flow of each quirk, control the stream pressure of each quirk in high-temperature roasting furnace chamber upstream;
Four, after a flame control cycle terminates, by lifting beam device, the smoke discharge frame ER in flame control unit, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR all to be vacillated downwards a dynamic furnace chamber along flame moving direction, the position of movable flashboard valve simultaneously, and regulated the cooling air quantity of each quirk in this place by cooling frame CR, to cool each furnace chamber of its upstream and downstream; Often overlap flame control unit to move successively to downstream and work as to go out and enter roasting technique when ripe piece of furnace chamber moves to position corresponding to the high-temperature roasting furnace chamber of original state and circulate the production cycle;
Circulation calcining process comprises:
Five, for often overlapping flame control unit, in a flame control cycle, by inserting each quirk path that push-pull valve cuts off the 4th preheating furnace chamber and seals between furnace chamber; By air blast frame BR by air from feeding each quirk; In each quirk, spray into the fuel oil of requirement or combustion gas so that the gas flow temperature of this place's quirk is risen to setting value by the controllable pulse valve on high-temp combustion frame HR3, to heat high-temperature roasting furnace chamber, residual heat stream is to intensification furnace chamber; In each quirk, spray into the fuel oil of requirement or combustion gas so that the gas flow temperature of this place's quirk is risen to setting value by the controllable pulse valve on middle temperature burning rack HR2, to heat medium temperature roast furnace chamber, residual heat stream is to low-temperature bake furnace chamber; In each quirk, the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk is risen to setting value by the controllable pulse valve on low-temperature burning frame HR1, to heat low-temperature bake furnace chamber, waste heat flows to the first preheating preheating furnace chamber, the second preheating furnace chamber, the 3rd preheating furnace chamber and the 4th preheating furnace chamber successively and discharges from smoke discharge frame ER; And entered gas flow temperature and the negative pressure value of each quirk of the 4th preheating furnace chamber by thermometric rack of measuring pressure TPR measurement, so that regulate the flue gas delivery flow of each quirk in smoke discharge frame ER place; The stream pressure value of each quirk in high-temperature roasting furnace chamber upstream is accurately measured, so that regulate air blast frame BR place to send into the air mass flow of each quirk by zero-pressure frame ZPR; The cooling air quantity of each quirk in this place is regulated, to cool each furnace chamber of its upstream and downstream by cooling frame CR;
Six, after a flame control cycle terminates, by lifting beam device, the smoke discharge frame ER in flame control unit, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR all to be vacillated downwards a dynamic furnace chamber along flame moving direction, simultaneously the position of movable flashboard valve; And the ripe anode gone out in the ripe piece of each hopper of furnace chamber is come out of the stove, green anode blank is loaded in each hopper of the raw block furnace chamber of prepackage, use inserts blind and cover green anode blank;
Seven, according to the control mode circular flow of step 5 and step 6.
As prioritization scheme, a kind of process control method utilizing the production roasting system of carbon anode used for aluminium electrolysis to carry out carbon anode production roasting of the present invention, wherein, in preroast operation and circulation calcining process process, the temperature of the arm flue gas in smoke discharge frame ER is made to control at 420 DEG C ~ 480 DEG C; The stream pressure making zero-pressure frame ZPR control each quirk in high-temperature roasting furnace chamber upstream is-4 ~ 0pa.A kind of process control method utilizing the production roasting system of carbon anode used for aluminium electrolysis to carry out carbon anode production roasting of the present invention, have the advantages that production efficiency is high, easy and simple to handle, safe and reliable, can effectively boost productivity more than 15%, and reduce fuel consumption 10 ~ 25%, and the pressure of smoke evacuation subsequent purification treatment system can be slowed down, reduce the probability of breaking out of fire, improve security.
Below in conjunction with detailed description of the invention shown in accompanying drawing, the production roasting system of a kind of carbon anode used for aluminium electrolysis of the present invention and process control method thereof are described in further detail:
Accompanying drawing explanation
Fig. 1 is the structural representation that in prior art, 54 furnace chambers 3 overlap the carbon anode production roasting system of flame control unit;
Fig. 2 is the schematic diagram of the process control procedure of single cover flame control unit in prior art;
Fig. 3 is the partial schematic diagram of the roasting furnace chamber for carbon anode production;
Fig. 4 is the structural representation that 60 furnace chambers 3 of the present invention overlap the carbon anode production roasting system of flame control unit;
Fig. 5 is the schematic diagram of the process control procedure of the first embodiment list of the present invention cover flame control unit;
Fig. 6 is the structural representation that 66 furnace chambers 3 of the present invention overlap the carbon anode production roasting system of flame control unit;
Fig. 7 is the schematic diagram of the process control procedure of the second embodiment list of the present invention cover flame control unit.
Detailed description of the invention
First it should be noted that, the present invention had both disclosed the production roasting system of carbon anode used for aluminium electrolysis, also disclosed the process control method utilizing the production roasting system of carbon anode used for aluminium electrolysis to carry out the production roasting of carbon anode.And wherein said air-flow, flue gas should do same concept understanding, all refer to the mist flowed in fire tube.
The first embodiment of the production roasting system of a kind of carbon anode used for aluminium electrolysis of the present invention as shown in Figures 3 to 5, comprise the circulating roaster unit be made up of 60 furnace chambers 1, the 3 cover flame control units be made up of various control frame, and for the lifting beam device of control cage in movable flame control unit, the multiple uncovered hopper 101 allowing each furnace chamber 1 include to be arranged side by side, closed quirk 102 is all set in the both sides of each hopper 101 and makes only to arrange a quirk 102 between two adjacent hoppers 101, the upper side wall of every bar quirk 102 all arranges four uniform combustion measurement holes along its length, combustion measurement hole is made to be communicated with the inner chamber of quirk 102 and to be provided with capping, be provided with partition wall 103 between two adjacent furnace chambers 1 and the corresponding quirk 102 of adjacent furnace chamber 1 is interconnected through partition wall 103, the push-pull valve 104 for cutting off or open corresponding quirk 102 between adjacent furnace chamber 1 is provided with in partition wall 103, make often to overlap flame control unit and include smoke discharge frame ER, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR,
Wherein, often overlap flame control unit in a flame control cycle, control 20 furnace chambers 1 and move forward a furnace chamber after each flame control cycle terminates, 20 furnace chambers 1 are followed successively by the raw block furnace chamber 11 of prepackage to downstream along flame moving direction from upstream, go out ripe piece of furnace chamber 12, first comes out of the stove in advance cools furnace chamber 13, second comes out of the stove in advance cools furnace chamber 14, first cooling furnace chamber 15, second cooling furnace chamber 16, 3rd cooling furnace chamber 17, 4th cooling furnace chamber 18, 5th cooling furnace chamber 19, 6th cooling furnace chamber 20, 7th cooling furnace chamber 21, high-temperature roasting furnace chamber 22, intensification furnace chamber 23, medium temperature roast furnace chamber 24, low-temperature bake furnace chamber 25, first preheating preheating furnace chamber 26, second preheating furnace chamber 27, 3rd preheating furnace chamber 28, 4th preheating furnace chamber 29 and sealing furnace chamber 30, smoke discharge frame ER is erected at the upside of the 4th preheating furnace chamber 29 and is in downstream, thermometric rack of measuring pressure TPR is erected at the upside of the 3rd preheating furnace chamber 28 and is in downstream, low-temperature burning frame HR1 is erected at the upper middle side part of the 3rd roasting furnace chamber 25, middle temperature burning rack HR2 is erected at the upper middle side part of the second roast furnace chamber 24, high-temp combustion frame HR3 is erected at the upper middle side part of the first roasting furnace chamber 22, zero-pressure frame ZPR is erected at the upside of the 7th cooling furnace chamber 17 and is in downstream, air blast frame BR is erected at the upper middle side part of the 4th cooling furnace chamber 18, cooling frame CR is erected at the upper middle side part of the first cooling furnace chamber 15.
The present invention is by above vibrational power flow, compared with producing roasting system with existing carbon anode, a preheating furnace chamber is added in the downstream of low-temperature bake furnace chamber 25, and between high-temperature roasting furnace chamber 22 and medium temperature roast furnace chamber 24, add an intensification furnace chamber 23, make preheating zone furnace chamber and roast area furnace chamber become four by three.The list cover flame control unit of this version, owing to extending from the distance the highest high-temp combustion frame HR3 to smoke discharge frame ER of temperature, can make full use of waste heat to reduce energy consumption on the one hand, practical application shows, adopts the present invention can reduce fuel consumption 10 ~ 25%.The programming rate of each furnace chamber between the two can be made to slow down because distance extends simultaneously, avoid the phenomenon that crackle appears in finished product, thus improve yield rate and product quality.On the other hand, correspondingly can shorten the time of flame control cycle, thus enhance productivity, adopt the production roasting system of the carbon anode used for aluminium electrolysis of version of the present invention, the time shorten that can make flame control cycle is 24 hours, enhances productivity more than 15%.In addition, adopt the production roasting system of carbon anode used for aluminium electrolysis of the present invention, the temperature of the arm flue gas of smoke discharge frame ER can be made to control at 420 DEG C ~ about 480 DEG C, 70 DEG C ~ 130 DEG C are reduced compared to 550 DEG C of traditional carbon anode production roasting system, slow down the pressure of subsequent purification treatment system, improve security simultaneously, reduce the probability of breaking out of fire.
The second embodiment of the production roasting system of a kind of carbon anode used for aluminium electrolysis of the present invention as shown in Figure 6 and Figure 7, comprise the circulating roaster unit be made up of 66 furnace chambers 1, the 3 cover flame control units be made up of various control frame, and for the lifting beam device of control cage in movable flame control unit, the multiple uncovered hopper 101 allowing each furnace chamber 1 include to be arranged side by side, closed quirk 102 is all set in the both sides of each hopper 101 and makes only to arrange a quirk 102 between two adjacent hoppers 101, the upper side wall of every bar quirk 102 all arranges four uniform combustion measurement holes along its length, combustion measurement hole is made to be communicated with the inner chamber of quirk 102 and to be provided with capping, be provided with partition wall 103 between two adjacent furnace chambers 1 and the corresponding quirk 102 of adjacent furnace chamber 1 is interconnected through partition wall 103, the push-pull valve 104 for cutting off or open corresponding quirk 102 between adjacent furnace chamber 1 is provided with in partition wall 103, make often to overlap flame control unit and include smoke discharge frame ER, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR,
Wherein, often overlap flame control unit in a flame control cycle, control 22 furnace chambers 1 and move forward a furnace chamber after each flame control cycle terminates, 22 furnace chambers 1 are followed successively by the raw block furnace chamber 11 ' of prepackage to downstream along flame moving direction from upstream, go out ripe piece of furnace chamber 12 ', first comes out of the stove in advance cools furnace chamber 13 ', second comes out of the stove in advance cools furnace chamber 14 ', first cooling furnace chamber 15 ', second cooling furnace chamber 16 ', 3rd cooling furnace chamber 17 ', 4th cooling furnace chamber 18 ', 5th cooling furnace chamber 19 ', 6th cooling furnace chamber 20 ', 7th cooling furnace chamber 21 ', 8th cooling furnace chamber 31 ', 9th cooling furnace chamber 32 ', high-temperature roasting furnace chamber 22 ', intensification furnace chamber 23 ', medium temperature roast furnace chamber 24 ', low-temperature bake furnace chamber 25 ', first preheating preheating furnace chamber 26 ', second preheating furnace chamber 27 ', 3rd preheating furnace chamber 28 ', 4th preheating furnace chamber 29 ' and sealing furnace chamber 30 ', smoke discharge frame ER is erected at the upside of the 4th preheating furnace chamber 29 ' and is in downstream, thermometric rack of measuring pressure TPR is erected at the upside of the 3rd preheating furnace chamber 28 ' and is in downstream, low-temperature burning frame HR1 is erected at the upper middle side part of the 3rd roasting furnace chamber 25 ', in warm burning rack HR2 be erected at the upper middle side part of the second roast furnace chamber 24 ', high-temp combustion frame HR3 is erected at the upper middle side part of the first roasting furnace chamber 22 ', zero-pressure frame ZPR is erected at the upside of the 9th cooling furnace chamber 32 ' and is in downstream, air blast frame BR is erected at the upper middle side part of the 5th cooling furnace chamber 19 ', cooling frame CR is erected at the upper middle side part of the first cooling furnace chamber 15 '.
Compared with the first embodiment, the second embodiment has increased two furnace chambers and has made two furnace chambers be in the both sides of air blast frame BR in cooling zone.This structure makes the furnace chamber between air blast frame BR and high-temp combustion frame HR3 fully can be heated by blower fan and sends into air themperature in quirk, makes burning more abundant, further increases utilization rate of waste heat, reduce energy consumption.
It should be noted that, smoke discharge frame ER in the present invention's two kinds of embodiments, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, identical all with existing carbon anode roasting system of the configuration of air blast frame BR and cooling frame CR and effect, wherein, smoke discharge frame ER is for controlling flue gas flow and the temperature of each quirk 102, and comprise smoke evacuation support, many the arms of discharging fume that smoke evacuation house steward and two ends are communicated with each quirk 102 with smoke evacuation house steward respectively, each bar smoke evacuation arm is all provided with flue gas flow control valve, smoke discharge frame control section is provided with negative pressure transmitter and temperature thermocouple, thermometric rack of measuring pressure TPR is used for measurement and enters the flue-gas temperature of the 4th preheating furnace chamber 29,29 ' and negative pressure and comprise the temperature thermocouple and load cell of measuring support and be arranged in each quirk 102, low-temperature burning frame HR1, middle temperature burning rack HR2 and high-temp combustion frame HR3 comprise combustion supporter, switch board and the temperature thermocouple that is arranged in each quirk 102 and the fuel oil matched with quirk or fire vapour pulse control valve respectively, zero-pressure frame ZPR comprises zero-pressure support and is arranged at the pressure sensor in each quirk 102, and pressure sensor is connected with the switch board of high-temp combustion frame HR3, air blast frame BR is for regulating the blow rate required of each quirk 102, and the blast pipe comprising air blast support and be communicated with each quirk 102, the porch of each blast pipe is respectively equipped with frequency conversion fan, cooling frame CR is for regulating the cooling air quantity of each quirk 102, and the cooling duct comprising cooling holder and be communicated with each quirk 102, each cooling duct is provided with constant speed blower fan and control valve.It is to be noted simultaneously, the hopper that the furnace chamber magnitude setting of the production roasting system of carbon anode used for aluminium electrolysis and each furnace chamber comprise and quirk quantity should be arranged according to concrete design production capacity, but the furnace chamber quantity that often cover flame control unit uses in a flame control cycle should be set to 20 or 22 according to two kinds of embodiments provided by the invention, to meet roasting technique control overflow of the present invention.
The process control method utilizing the production roasting system of carbon anode used for aluminium electrolysis to carry out carbon anode production roasting disclosed by the invention, specifically comprises preroast operation and circulation calcining process two processes:
Preroast operation comprises:
One, in all hoppers 101 of each furnace chamber, load green anode blank, use inserts blind and cover green anode blank;
Two, set up the smoke discharge frame ER in flame control unit, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR respectively, and connect corresponding observing and controlling parts;
Three, for often overlapping flame control unit, in a flame control cycle, cut off the 4th preheating furnace chamber 29, each quirk 102 path between 29 ' and sealing furnace chamber 30,30 ' by inserting push-pull valve 104, and make from each article of quirk connection between prepackage raw block furnace chamber the 11,11 ' to the 4th preheating furnace chamber 29,29 '; By air blast frame BR, air is sent into each quirk 102; In each quirk 102, the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk 102 is risen to setting value by the controllable pulse valve on high-temp combustion frame HR3, to heat high-temperature roasting furnace chamber 22,22 ', residual heat stream is to intensification furnace chamber 23,23 '; In each quirk 102, the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk 102 is risen to setting value by the controllable pulse valve on middle temperature burning rack HR2, to heat medium temperature roast furnace chamber 24,24 ', residual heat stream is to low-temperature bake furnace chamber 25,25 '; In each quirk 102, the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk 102 is risen to setting value by the controllable pulse valve on low-temperature burning frame HR1, to heat low-temperature bake furnace chamber 25,25 ', waste heat flows to the first preheating preheating furnace chamber 26,26 ', second preheating furnace chamber the 27,27 ', the 3rd preheating furnace chamber the 28,28 ' and the 4th preheating furnace chamber 29,29 ' and discharge from smoke discharge frame ER successively; And entered gas flow temperature and the negative pressure value of each quirk 102 of the 4th preheating furnace chamber 29,29 ' by thermometric rack of measuring pressure TPR measurement, so that regulate the flue gas delivery flow of each quirk 102 in smoke discharge frame ER place; Accurately measured the stream pressure value of each quirk 102 in high-temperature roasting furnace chamber 22,22 ' upstream by zero-pressure frame ZPR, to regulate air blast frame BR place to send into the air mass flow of each quirk 102, control the stream pressure of each quirk 102 in high-temperature roasting furnace chamber 22,22 ' upstream;
Four, after a flame control cycle terminates, by lifting beam device, the smoke discharge frame ER in flame control unit, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR all to be vacillated downwards a dynamic furnace chamber along flame moving direction, the position of movable flashboard valve 104 simultaneously, and regulated the cooling air quantity of each quirk 102 in this place by cooling frame CR, to cool each furnace chamber of its upstream and downstream; Often cover flame control unit moves successively to downstream and works as when ripe piece of furnace chamber 12,12 ' moves to the position of high-temperature roasting furnace chamber 22, the 22 ' correspondence of original state and enters the roasting technique circulation production cycle;
Circulation calcining process comprises:
Five, for often overlapping flame control unit, in a flame control cycle, the 4th preheating furnace chamber 29,29 ' and each quirk 102 path of sealing between furnace chamber 30,30 ' is cut off by inserting push-pull valve 104; By air blast frame BR by air from feeding each quirk 102; In each quirk 102, the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk 102 is risen to setting value by the controllable pulse valve on high-temp combustion frame HR3, to heat high-temperature roasting furnace chamber 22,22 ', residual heat stream is to intensification furnace chamber 23,23 '; In each quirk 102, the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk 102 is risen to setting value by the controllable pulse valve on middle temperature burning rack HR2, to heat medium temperature roast furnace chamber 24,24 ', residual heat stream is to low-temperature bake furnace chamber 25,25 '; In each quirk 102, the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk 102 is risen to setting value by the controllable pulse valve on low-temperature burning frame HR1, to heat low-temperature bake furnace chamber 25,25 ', waste heat flows to the first preheating preheating furnace chamber 26,26 ', second preheating furnace chamber the 27,27 ', the 3rd preheating furnace chamber the 28,28 ' and the 4th preheating furnace chamber 29,29 ' and discharge from smoke discharge frame ER successively; And entered gas flow temperature and the negative pressure value of each quirk 102 of the 4th preheating furnace chamber 29,29 ' by thermometric rack of measuring pressure TPR measurement, so that regulate the flue gas delivery flow of each quirk 102 in smoke discharge frame ER place; The stream pressure value of each quirk 102 in high-temperature roasting furnace chamber 22,22 ' upstream is accurately measured, so that regulate air blast frame BR place to send into the air mass flow of each quirk 102 by zero-pressure frame ZPR; The cooling air quantity of each quirk 102 in this place is regulated, to cool each furnace chamber of its upstream and downstream by cooling frame CR;
Six, after a flame control cycle terminates, by lifting beam device, the smoke discharge frame ER in flame control unit, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR all to be vacillated downwards a dynamic furnace chamber along flame moving direction, simultaneously the position of movable flashboard valve; And the ripe anode gone out in each hopper 101 of ripe piece of furnace chamber 12,12 ' is come out of the stove, green anode blank is loaded in each hopper 101 of the raw block furnace chamber 11,11 ' of prepackage, use inserts blind and cover green anode blank;
Seven, according to the control mode circular flow of step 5 and step 6.
In actual production roasting process, the temperature of the arm flue gas of smoke discharge frame ER should be made to control at 420 DEG C ~ 480 DEG C; And the stream pressure making zero-pressure frame ZPR control each quirk 102 in high-temperature roasting furnace chamber 22,22 ' upstream is between-4 ~ 0pa.
Adopt production roasting system and the process control method thereof of carbon anode used for aluminium electrolysis of the present invention, there is following beneficial effect: 1) can system waste heat be made full use of; 2) the flame control cycle of heating curve is minimum can be controlled to 24 hours, and can significantly enhance productivity, practical application shows, production efficiency can be made to improve more than 15% compared to traditional carbon anode roasting system; 3) effectively can reduce fuel consumption, realize energy-conservation object, practical application shows, can reduce fuel consumption 10 ~ 25% compared to traditional carbon anode roasting system unit production capacity; 4) simple to operate, do not need to change too many hardware working condition compared to traditional carbon anode roasting system, put into operation and management difficulty little; 5) finished product effectively can be avoided to occur the phenomenon of crackle, thus improve the quality of products and yield rate; 6) smoke discharge frame ER flue gas control temperature reduces 70 DEG C ~ 130 DEG C compared to traditional carbon anode roasting system, effectively can reduce the pressure of flue gas subsequent purification treatment system, and reduces the possibility of fire incident generation.
Above embodiment is only the description carried out the preferred embodiment for the present invention; the restriction not request protection domain of the present invention carried out; under not departing from the present invention and designing the prerequisite of spirit; the various forms of distortion that this area engineers and technicians make according to technical scheme of the present invention, all should fall in protection domain that claims of the present invention determine.
Claims (5)
1. the production roasting system of a carbon anode used for aluminium electrolysis, comprise the circulating roaster unit be made up of multiple furnace chamber (1), the at least a set of flame control unit be made up of various control frame, and for the lifting beam device of control cage in movable flame control unit, each furnace chamber (1) includes the multiple uncovered hopper (101) be arranged side by side, the both sides of each hopper (101) are equipped with closed quirk (102) and make only to arrange a quirk (102) between two adjacent hoppers (101), the upper side wall of every bar quirk (102) is equipped with four uniform combustion measurement holes along its length, combustion measurement hole is communicated with the inner chamber of quirk (102) and is provided with capping, be provided with partition wall (103) between two adjacent furnace chambers (1) and the corresponding quirk (102) of adjacent furnace chamber (1) is interconnected through partition wall (103), the push-pull valve (104) for cutting off or open corresponding quirk (102) between adjacent furnace chamber (1) is provided with in partition wall (103), often overlap flame control unit and include smoke discharge frame ER, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR,
It is characterized in that: often overlap flame control unit and in a flame control cycle, control 20 furnace chambers (1) and move forward a furnace chamber after each flame control cycle terminates, described 20 furnace chambers (1) are followed successively by raw block furnace chamber (11) of prepackage to downstream along flame moving direction from upstream, go out ripe piece of furnace chamber (12), first comes out of the stove in advance cools furnace chamber (13), second comes out of the stove in advance cools furnace chamber (14), first cooling furnace chamber (15), second cooling furnace chamber (16), 3rd cooling furnace chamber (17), 4th cooling furnace chamber (18), 5th cooling furnace chamber (19), 6th cooling furnace chamber (20), 7th cooling furnace chamber (21), high-temperature roasting furnace chamber (22), intensification furnace chamber (23), medium temperature roast furnace chamber (24), low-temperature bake furnace chamber (25), first preheating preheating furnace chamber (26), second preheating furnace chamber (27), 3rd preheating furnace chamber (28), 4th preheating furnace chamber (29) and sealing furnace chamber (30), described smoke discharge frame ER is erected at the upside of the 4th preheating furnace chamber (29) and is in downstream, thermometric rack of measuring pressure TPR is erected at the upside of the 3rd preheating furnace chamber (28) and is in downstream, low-temperature burning frame HR1 is erected at the upper middle side part of the 3rd roasting furnace chamber (25), middle temperature burning rack HR2 is erected at the upper middle side part of the second roast furnace chamber (24), high-temp combustion frame HR3 is erected at the upper middle side part of the first roasting furnace chamber (22), zero-pressure frame ZPR is erected at the upside of the 7th cooling furnace chamber (17) and is in downstream, air blast frame BR is erected at the upper middle side part of the 4th cooling furnace chamber (18), cooling frame CR is erected at the upper middle side part of the first cooling furnace chamber (15).
2. the production roasting system of a carbon anode used for aluminium electrolysis, comprise the circulating roaster unit be made up of multiple furnace chamber (1), the at least a set of flame control unit be made up of various control frame, and for the lifting beam device of control cage in movable flame control unit, each furnace chamber (1) includes the multiple uncovered hopper (101) be arranged side by side, the both sides of each hopper (101) are equipped with closed quirk (102) and make only to arrange a quirk (102) between two adjacent hoppers (101), the upper side wall of every bar quirk (102) is equipped with four uniform combustion measurement holes along its length, combustion measurement hole is communicated with the inner chamber of quirk (102) and is provided with capping, be provided with partition wall (103) between two adjacent furnace chambers (1) and the corresponding quirk (102) of adjacent furnace chamber (1) is interconnected through partition wall (103), the push-pull valve (104) for cutting off or open corresponding quirk (102) between adjacent furnace chamber (1) is provided with in partition wall (103), often overlap flame control unit and include smoke discharge frame ER, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR,
It is characterized in that: often overlap flame control unit and in a flame control cycle, control 22 furnace chambers (1) and move forward a furnace chamber after each flame control cycle terminates, described 22 furnace chambers (1) are followed successively by raw block furnace chamber (11 ') of prepackage to downstream along flame moving direction from upstream, go out ripe piece of furnace chamber (12 '), first comes out of the stove in advance cools furnace chamber (13 '), second comes out of the stove in advance cools furnace chamber (14 '), first cooling furnace chamber (15 '), second cooling furnace chamber (16 '), 3rd cooling furnace chamber (17 '), 4th cooling furnace chamber (18 '), 5th cooling furnace chamber (19 '), 6th cooling furnace chamber (20 '), 7th cooling furnace chamber (21 '), 8th cooling furnace chamber (31 '), 9th cooling furnace chamber (32 '), high-temperature roasting furnace chamber (22 '), intensification furnace chamber (23 '), medium temperature roast furnace chamber (24 '), low-temperature bake furnace chamber (25 '), first preheating preheating furnace chamber (26 '), second preheating furnace chamber (27 '), 3rd preheating furnace chamber (28 '), 4th preheating furnace chamber (29 ') and sealing furnace chamber (30 '), described smoke discharge frame ER is erected at the upside of the 4th preheating furnace chamber (29 ') and is in downstream, thermometric rack of measuring pressure TPR is erected at the upside of the 3rd preheating furnace chamber (28 ') and is in downstream, low-temperature burning frame HR1 is erected at the upper middle side part of the 3rd roasting furnace chamber (25 '), middle temperature burning rack HR2 is erected at the upper middle side part of the second roast furnace chamber (24 '), high-temp combustion frame HR3 is erected at the upper middle side part of the first roasting furnace chamber (22 '), zero-pressure frame ZPR is erected at the upside of the 9th cooling furnace chamber (32 ') and is in downstream, air blast frame BR is erected at the upper middle side part of the 5th cooling furnace chamber (19 '), cooling frame CR is erected at the upper middle side part of the first cooling furnace chamber (15 ').
3. according to the production roasting system of the carbon anode a kind of used for aluminium electrolysis described in claim 1 or 2, it is characterized in that: described smoke discharge frame ER is for controlling flue gas flow and the temperature of each quirk (102), and comprise smoke evacuation support, smoke evacuation house steward and two ends respectively with many arms of discharging fume being communicated with each quirk (102) of smoke evacuation house steward, each bar smoke evacuation arm is all provided with flue gas flow control valve, and smoke discharge frame control section is provided with negative pressure transmitter and temperature thermocouple; Thermometric rack of measuring pressure TPR is used for measurement and enters the flue-gas temperature of the 4th preheating furnace chamber (29,29 ') and negative pressure and comprise the temperature thermocouple and load cell of measuring support and be arranged in each quirk (102); Described low-temperature burning frame HR1, middle temperature burning rack HR2 and high-temp combustion frame HR3 comprise combustion supporter, switch board and the temperature thermocouple that is arranged in each quirk (102) and the fuel oil matched with quirk or fire vapour pulse control valve respectively; Zero-pressure frame ZPR comprises zero-pressure support and is arranged at the pressure sensor in each quirk (102), and pressure sensor is connected with the switch board of high-temp combustion frame HR3; Air blast frame BR is for regulating the blow rate required of each quirk (102), and the blast pipe comprising air blast support and be communicated with each quirk (102), the porch of each blast pipe is respectively equipped with frequency conversion fan; Cooling frame CR is for regulating the cooling air quantity of each quirk (102), and the cooling duct comprising cooling holder and be communicated with each quirk (102), each cooling duct is provided with constant speed blower fan and control valve.
4. utilize the production roasting system of carbon anode used for aluminium electrolysis described in claim 3 to carry out a process control method for carbon anode production roasting, it is characterized in that, comprise preroast operation and circulation calcining process two processes:
Preroast operation comprises:
One, in all hoppers (101) of each furnace chamber, load green anode blank, use inserts blind and cover green anode blank;
Two, set up the smoke discharge frame ER in flame control unit, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR respectively, and connect corresponding observing and controlling parts;
Three, for often overlapping flame control unit, in a flame control cycle, by inserting each quirk (102) path that push-pull valve (104) cuts off the 4th preheating furnace chamber (29,29 ') and seals between furnace chamber (30,30 '), and make to be communicated with from each article of quirk between raw block furnace chamber (11,11 ') to the 4th preheating furnace chamber (29,29 ') of prepackage; By air blast frame BR, air is sent into each quirk (102); In each quirk (102), the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk (102) is risen to setting value by the controllable pulse valve on high-temp combustion frame HR3, to heat high-temperature roasting furnace chamber (22,22 '), residual heat stream is to intensification furnace chamber (23,23 '); In each quirk (102), the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk (102) is risen to setting value by the controllable pulse valve on middle temperature burning rack HR2, to heat medium temperature roast furnace chamber (24,24 '), residual heat stream is to low-temperature bake furnace chamber (25,25 '); In each quirk (102), the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk (102) is risen to setting value by the controllable pulse valve on low-temperature burning frame HR1, to heat low-temperature bake furnace chamber (25,25 '), waste heat flows to the first preheating preheating furnace chamber (26,26 '), the second preheating furnace chamber (27,27 '), the 3rd preheating furnace chamber (28,28 ') and the 4th preheating furnace chamber (29,29 ') successively and discharges from smoke discharge frame ER; And entered gas flow temperature and the negative pressure value of the 4th preheating furnace chamber (29,29 ') each quirk (102) by thermometric rack of measuring pressure TPR measurement, so that regulate the flue gas delivery flow at each quirk in smoke discharge frame ER place (102); The stream pressure value of each quirk in high-temperature roasting furnace chamber (22,22 ') upstream (102) is accurately measured by zero-pressure frame ZPR, to regulate air blast frame BR place to send into the air mass flow of each quirk (102), control the stream pressure of the high-temperature roasting each quirk in furnace chamber (22,22 ') upstream (102);
Four, after a flame control cycle terminates, by lifting beam device, the smoke discharge frame ER in flame control unit, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR all to be vacillated downwards a dynamic furnace chamber along flame moving direction, the position of movable flashboard valve (104) simultaneously, and regulated the cooling air quantity at each quirk in this place (102) by cooling frame CR, to cool each furnace chamber of its upstream and downstream; Often cover flame control unit moves successively to downstream and works as when ripe piece of furnace chamber (12,12 ') moves to the position of high-temperature roasting furnace chamber (22, the 22 ') correspondence of original state and enters the roasting technique circulation production cycle;
Circulation calcining process comprises:
Five, for often overlapping flame control unit, in a flame control cycle, by inserting each quirk (102) path that push-pull valve (104) cuts off the 4th preheating furnace chamber (29,29 ') and seals between furnace chamber (30,30 '); By air blast frame BR by air from feeding each quirk (102); In each quirk (102), the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk (102) is risen to setting value by the controllable pulse valve on high-temp combustion frame HR3, to heat high-temperature roasting furnace chamber (22,22 '), residual heat stream is to intensification furnace chamber (23,23 '); In each quirk (102), the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk (102) is risen to setting value by the controllable pulse valve on middle temperature burning rack HR2, to heat medium temperature roast furnace chamber (24,24 '), residual heat stream is to low-temperature bake furnace chamber (25,25 '); In each quirk (102), the fuel oil of requirement or combustion gas is sprayed into so that the gas flow temperature of this place's quirk (102) is risen to setting value by the controllable pulse valve on low-temperature burning frame HR1, to heat low-temperature bake furnace chamber (25,25 '), waste heat flows to the first preheating preheating furnace chamber (26,26 '), the second preheating furnace chamber (27,27 '), the 3rd preheating furnace chamber (28,28 ') and the 4th preheating furnace chamber (29,29 ') successively and discharges from smoke discharge frame ER; And entered gas flow temperature and the negative pressure value of the 4th preheating furnace chamber (29,29 ') each quirk (102) by thermometric rack of measuring pressure TPR measurement, so that regulate the flue gas delivery flow at each quirk in smoke discharge frame ER place (102); The stream pressure value of each quirk in high-temperature roasting furnace chamber (22,22 ') upstream (102) is accurately measured, so that regulate air blast frame BR place to send into the air mass flow of each quirk (102) by zero-pressure frame ZPR; The cooling air quantity at each quirk in this place (102) is regulated, to cool each furnace chamber of its upstream and downstream by cooling frame CR;
Six, after a flame control cycle terminates, by lifting beam device, the smoke discharge frame ER in flame control unit, thermometric rack of measuring pressure TPR, low-temperature burning frame HR1, middle temperature burning rack HR2, high-temp combustion frame HR3, zero-pressure frame ZPR, air blast frame BR and cooling frame CR all to be vacillated downwards a dynamic furnace chamber along flame moving direction, simultaneously the position of movable flashboard valve; And the ripe anode gone out in the ripe piece of each hopper of furnace chamber (12,12 ') (101) is come out of the stove, green anode blank is loaded in each hopper (101) of raw block furnace chamber (11,11 ') of prepackage, use inserts blind and cover green anode blank;
Seven, according to the control mode circular flow of step 5 and step 6.
5. according to a kind of process control method utilizing the production roasting system of carbon anode used for aluminium electrolysis to carry out carbon anode production roasting according to claim 4, it is characterized in that: the temperature of the arm flue gas in described smoke discharge frame ER controls at 420 DEG C ~ 480 DEG C; The stream pressure that described zero-pressure frame ZPR controls the high-temperature roasting each quirk in furnace chamber (22,22 ') upstream (102) is-4 ~ 0pa.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108624916A (en) * | 2018-07-09 | 2018-10-09 | 茌平华信碳素有限公司 | A kind of preparation method of anode carbon block for aluminium electrolysis |
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| CN114396799A (en) * | 2022-01-17 | 2022-04-26 | 安徽省交通控股集团有限公司 | Temperature bin-dividing control equipment for steam curing kiln and self-adaptive control method |
| CN114396799B (en) * | 2022-01-17 | 2023-12-08 | 安徽省交通控股集团有限公司 | Self-adaptive control method of steam-curing kiln temperature sub-bin control equipment |
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