CN206492351U - A kind of carbon anode roasting gas cleaning minimum discharge system - Google Patents
A kind of carbon anode roasting gas cleaning minimum discharge system Download PDFInfo
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- CN206492351U CN206492351U CN201720020409.9U CN201720020409U CN206492351U CN 206492351 U CN206492351 U CN 206492351U CN 201720020409 U CN201720020409 U CN 201720020409U CN 206492351 U CN206492351 U CN 206492351U
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Abstract
A kind of carbon anode roasting gas cleaning minimum discharge system, system includes spray cooler, electrical tar precipitator, desulfurization defluorinate device, the flue gas output end of spray cooler connects the smoke inlet of electrical tar precipitator, and the exhanst gas outlet of electrical tar precipitator connects the smoke inlet of desulfurization defluorinate device by smoke exhaust fan；Anode system in electrical tar precipitator is using multifunctional assembled bimodal slab anode row, and cathod system uses rib type line and square line；Hot cleaner is provided with electrical tar precipitator.The utility model items pollutant emission index is all up to the national Air Pollutant Emission requirement of 2016 the year two thousand thirties.Gas cleaning efficiency high.Key point in systems is provided with temperature monitoring point, to may burning-point be monitored control, it is ensured that keep the safety in production.Hot cleaner can effectively prevent the generation of Xu Ran phenomenons in electrical tar precipitator.Pole of the present utility model is matched somebody with somebody with mode using hybrid pole, improves purification efficiency.
Description
Technical field
The utility model is related to aluminium industry carbon anode roasting smoke gas treatment field, more particularly to a kind of carbon anode roasting
Gas cleaning minimum discharge system.
Background technology
Bituminous, tar, particulate matter dust, SO in aluminium industry carbon anode roasting smoke gas treatment, baking flue gas2, fluorination
Carbon product species in thing (solid fluorine), nitride, aluminium industry needed for electrolytic furnace is various, volatilizees or distributes in roasting technique
Substantial amounts of bitumen flue gas (containing tar) and particulate matter dust and sulfur dioxide, fluorine (solid), HF, nitrogen oxides, and pitch
Also containing more than the 80 kinds of multiring aromatic hydrocarbon such as three or four benzo pyrrole carbazoles in cigarette, and most of is strong carcinogen, particle diameter 0.1~
Between 1.0 μm, minimum about 0.01 μm, maximum at 1.0 μm, difficulty of governance is big, it has also become current environment protection treating is badly in need of solution
Big problem certainly.
Current Chalco carbon anode roasting flue gas purification system electrical tar precipitator cathode line still uses Φ 2mm- Φ 4mm
Round wires, the definition of Φ 2mm- Φ 4mm round wires：The critical corona voltage of round wires is high, and corona current is small, and strength of discharge is low, this round wires
It is former Soviet Union's technology before 30 years, the advanced country in the world and the electric precipitation of China's other industry no longer use this backwardness already
Polar curve mode.Anode：Still using the calandria positive plate (Japan 70 years of backward Φ 20mm- Φ 40mm gas pipes composition
For the backwardness technology of former formula electrical tar precipitator), asphalt smoke is difficult charged, and the tarvia dust adhesion of pre electrified is in Φ
20mm- Φ 40mm anode tube row on, release electric charge it is extremely difficult, its result cause the voltage of electric field reduce, electric current increase, frequently
The short circuit dischange of frequency, purifying property significantly deteriorates, and causes the short circuit of electrical tar precipitator electric field, causes equipment not run.Such knot
The equipment of structure wastes the energy, backward in technique, and every pollutant emission index can not all meet the requirement of the new new energy discharge index of country.
And without SO in existing carbon baking flue gas cleaning system2, F (Gu) and nitride purifier
Utility model content
The purpose of this utility model is to overcome that of the prior art not enough there is provided a kind of carbon anode roasting gas cleaning
Minimum discharge system, realizes the purification and minimum discharge of baking flue gas.
To achieve the above object, the utility model is realized using following technical scheme：
A kind of carbon anode roasting gas cleaning minimum discharge system, including spray cooler, electrical tar precipitator, desulfurization take off
Fluorine device, the flue gas output end of spray cooler connects the smoke inlet of electrical tar precipitator, and the exhanst gas outlet of electrical tar precipitator leads to
Cross the smoke inlet that smoke exhaust fan connects desulfurization defluorinate device；Anode system in the electrical tar precipitator uses many work(of combined type
The bimodal slab anode row of energy, cathod system uses rib type line and square line；Hot cleaner is provided with electrical tar precipitator.
The multifunctional assembled bimodal slab anode row is formed by connecting by several multi-functional bimodal slab anode rows,
The multi-functional bimodal slab anode row includes board-like main body, horizontal pipeline, pipe tunnel, and horizontal pipeline is arranged on board-like main body
Upper and lower ends, pipe tunnel is longitudinally disposed board-like main body, is interconnected between horizontal pipeline and pipe tunnel, in longitudinal direction
The steel plate that a layer cross section is triangle is wrapped up in the outside of pipeline, and an angle of triangle is arranged in board-like main body, two other
Angle is outwardly formed projection from the plate face of board-like main body.
Described cathod system uses major insulation overhung construction, and the structure includes major insulation incubator, the height of upper end
Insulating protective cover and the suspension apparatus of lower end, high insulating protective cover are arranged between major insulation incubator and suspension apparatus.
The cavity that height is 1m~1.5m is provided with the bottom of the major insulation incubator, in the upper of major insulation incubator
Portion is provided with heater, is incubated in major insulation at the cavity of lower box part and is also equipped with heater.
Be provided with two-way atomising device in the upper end of the spray cooler, two-way atomising device be set to above and below two sprays
Shower pipe road, demister is provided between two spray pipings, and the bottom of spray cooler is provided with gas collecting apparatus.
The gas collecting apparatus includes airflow-distribution board, exhanst gas outlet pipeline, ash bucket, hot coal oil heater, air flow method
Plate is arranged on the upper end of ash bucket, and exhanst gas outlet pipeline is arranged on the centre position of airflow-distribution board, pacifies in the lower end of ash bucket
Equipped with hot coal oil heater, the bottom of ash bucket is provided with pitch blowoff valve.
Described electrical tar precipitator sets quantity to be 2, and 1 is set in wherein one electrical tar precipitator#With 2#Two electricity
, set 3 in another electrical tar precipitator#With 4#Two electric fields, 1#With 3#Electric field is using multifunctional assembled bimodal board-like
Anode deploying square line cathode, 2#With 4#Electric field uses multifunctional assembled bimodal slab anode deploying rib type line cathode.
Oily dirt separator is provided with the smoke inlet of the electrical tar precipitator, oily dirt separator includes deflector type air-flow
Distribution grid, G types airflow-distribution board, ash bucket, ash bucket are arranged on the lower end of oily dirt separator, deflector type airflow-distribution board and G type gas
Flow point fabric swatch arranges in tandem from smoke inlet direction, and G types airflow-distribution board includes several different pore sizes and percent opening
Hole on airflow-distribution board, deflector type airflow-distribution board is delthyrium.
The desulfurization defluorinate device includes pond, air inlet pipe, shower, demister, and pond is arranged on desulfurization defluorinate device
Bottom, the entrance of air inlet pipe is provided with spray equipment, the exhanst gas outlet of air inlet pipe is stretched into pond, in desulfurization defluorinate device
Top set gradually demister and shower from top to bottom, shower is connected by water pump with pond, and pond is additionally provided with row
The mouth of a river and water supplement port.
Compared with prior art, the beneficial effects of the utility model are：
1) every pollutant emission index is all up the national Air Pollutant Emission requirements of 2016-2030.
2) the utility model is provided with oily dirt separator at the smoke inlet of electrical tar precipitator, is trapped before electric field is entered
80% dust is simultaneously discharged from the ash bucket of oily dirt separator lower end, effectively improves gas cleaning efficiency.
3) key point in systems is provided with temperature monitoring point, to may burning-point be monitored control, when detecting
In system during temperature jump Δ t >=10 DEG C of any test point, temperature sensor sends accident alarming command signal, starts in time
Fire fighting device in system, it is ensured that safety in production.
4) hot cleaner, anode steam tracing device are provided with electrical tar precipitator of the present utility model, to electric fishing
The pitch dust that the cathode and anode system cohesion of tar device is heaped and the cleaning that the mixture of tar is carried out periodically or non-periodically (can
Powered cleaning, scavenging period 40~90 minutes) ensure the operation of electrical tar precipitator stability and high efficiency.Meanwhile, hot cleaner is also
The generation of Xu Ran phenomenons in electrical tar precipitator can effectively be prevented.
5) pole of the present utility model is matched somebody with somebody with mode using hybrid pole, is characterized in that the discharge inception voltage of electric field is low, corona electricity
Stream is big, increases corona density, adds the specific dust collection area of positive plate, easily traps the pitch and tar in bitumen flue gas,
Improve purification efficiency.
Brief description of the drawings
Fig. 1 is a kind of arrangement total figure of carbon anode roasting gas cleaning minimum discharge system of the utility model；
Fig. 2 is Fig. 1 top view；
Fig. 3 is the schematic diagram of electrical tar precipitator hot cleaner；
Fig. 4 is Fig. 3 H direction views；
Fig. 5 is the structural representation of multifunctional assembled bimodal slab anode row；
Fig. 6 is Fig. 5 A-A direction views；
Fig. 7 is Fig. 5 B direction views；
Fig. 8 is the sectional view of square line；
Fig. 9 is the sectional view of rib type line；
Figure 10 is the schematic diagram of cathod system major insulation overhung construction；
Figure 11 is Figure 10 C direction views；
Figure 12 is I point enlarged drawings in Figure 10
Figure 13 is the structural representation of spray cooler；
Figure 14 is Figure 13 D-D direction views；
Figure 15 is the enlarged drawing of gas collecting apparatus；
Figure 16 is the structural representation of the oily dirt separator of electrical tar precipitator；
Figure 17 is Figure 16 E-E direction views；
Figure 18 is Figure 16 F-F direction views；
Figure 19 is Figure 16 G-G direction views；
Figure 20 is the structural representation of desulfurization defluorinate device；
Figure 21 is a kind of process chart of carbon anode roasting gas cleaning minimum discharge system of the utility model.
In figure：1- spray coolers, 2- electrical tar precipitators, 3- smoke exhaust fans, 4- desulfurization defluorinates device, 5- chimneys, 6- steam
Steam cutting access point, 7- sections are the steel plate of triangle, 8- pipe tunnels, the board-like main bodys of 9-, 10- horizontal pipelines, 11- flanges, 12- the moon
Polar curve, 13- cathode frames, the high insulating protective covers of 14-, 15- cavitys, 16- major insulations incubator, 17- heaters, 18- channel-section steels
Shower under beam, 19- pressing plates, 20- bolts, 21- nuts, 22- demister 23- temperature sensors, the upper spray pipings of 24-, 25-
Road, 26- vavle shelves, 27- exhanst gas outlets pipeline, 28- airflow-distribution boards, 29- hot coals oil heater, 29-1 oiling devices, 29-2 heat
Kerosene, 29-3 electric heater units, 30- pitches blowoff valve, 31- hot-water cylinders, the box advection sewage-treatment plants of 32- tetra-, 33- bafflings
Formula airflow-distribution board, 34-G types airflow-distribution board, 35- ash buckets, 36- spray pipings, 37- hot cleaners main pipeline, 38- ashes
Struggle against hot water injection's pipeline, 39- overflow pipes, 40- spray equipments, 41- alkali lye pulping equipment, 42- gutters, 43- showers, 44-
Air inlet pipe, 45- water pumps, 46-PH values sensor, 47- cutting-off controllings valve, the windproof grooves of 48-.
Embodiment
Embodiment of the present utility model is further illustrated below in conjunction with the accompanying drawings：
See Fig. 1-Fig. 2, a kind of carbon anode roasting gas cleaning minimum discharge system, including spray cooler 1, electric tar
Oily device 2, desulfurization defluorinate device 4, the flue gas output end of spray cooler 1 connect the smoke inlet of electrical tar precipitator 2, electrically trapped tar oil
The exhanst gas outlet of device 2 connects the smoke inlet of desulfurization defluorinate device 4, the exhanst gas outlet of desulfurization defluorinate device 4 by smoke exhaust fan 3
Connect chimney 5；Anode system in the electrical tar precipitator 2 is using multifunctional assembled bimodal slab anode row, cathod system
Using rib type line and square line；Hot cleaner is provided with electrical tar precipitator 2.
See Fig. 3, Fig. 4, Figure 16, Figure 21, hot cleaner includes hot-water cylinder 31, hot cleaner main pipeline 37, ash
Bucket hot water injection pipeline 38 and the spray piping 36 for being arranged at the electric field upper end of electrical tar precipitator 2, are first passed through hot water by fire water
Tank 31 is heated, and hot cleaner main pipeline 37 connects hot-water line and cold water pipe simultaneously, when normally producing, is cleaned to hot water
90 DEG C~100 DEG C of hot water is passed through in device main pipeline 37, the cathode and anode system of electrical tar precipitator is coagulated by spray piping 36
The mixture of poly- the pitch dust heaped and tar carry out periodically or non-periodically cleaning (powered can clean, scavenging period 40~
90 minutes), then coordinate anode steam heat tracing system use (be passed through into horizontal pipeline 10 and pipe tunnel 8 steam or
Remaining hot water), it can prevent cathode line dross, anode row from scabbing, the purification efficiency of flue gas can be not only improved, while can be effective
Elimination Xu Ran phenomenons generation, it is ensured that the operation of the stability and high efficiency of electrical tar precipitator 2.
The electric power system of electrical tar precipitator 2 is resistivity set electric current, the voltage according to water, and using the control of constant current constant voltage
Mode processed, controls delivery efficiency, and the shower water of hot cleaner will not produce conductive effect, therefore under the delivery efficiency
Hot water cleaning in electrical tar precipitator 2 can be with powered on-line implement.
Hot cleaner main pipeline 37 also by ash bucket 35 from ash bucket hot water injection pipeline 38 to the bottom of electrical tar precipitator 2
In be passed through hot water, to ash bucket 35 carry out hot water cleaning, prevent Xu Ran phenomenons.
When the mutation of the internal temperature of electrical tar precipitator 2 exceeds setting range, then lead into hot cleaner main pipeline 37
Enter cold water, open the fire mode of big above-water method.
See Fig. 5-Fig. 7, the multifunctional assembled bimodal slab anode row is by several multi-functional bimodal slab anodes
Row is formed by connecting, and the multi-functional bimodal slab anode row includes board-like main body 9, horizontal pipeline 10, pipe tunnel 8, transverse pipe
Road 10 is arranged on the upper and lower ends of board-like main body 9, and pipe tunnel 8 is longitudinally disposed board-like main body 9, horizontal pipeline 10 and longitudinal direction
It is interconnected between pipeline 8, the steel plate 7 that a layer cross section is triangle, an angle of triangle is wrapped up in the outside of pipe tunnel 8
It is arranged on 9 in board-like main body, two other angle is outwardly formed projection from the plate face of board-like main body 9.The steel plate 7 of the triangle is in plate
The both sides of the plate plane of formula main body 9 form the projection of double-peak type, form windproof groove 48.Single multi-functional bimodal slab anode row
Between connected by flange 11, constitute multifunctional assembled bimodal slab anode row.
Windproof groove 48 has the function of shield gas flow, makes the air flow method into electric field uniform, does not produce turbulent flow, so that
Accelerate the chargeability of bitumen flue gas, coordinate the structure of the big board-like main body 9 of specific dust collection area, more can effectively trap pitch tobacco powder
Dirt；Section is that the steel plate 7 of triangle and the compound rigidity of board-like main body 9 are strong simultaneously, and under hot conditions, heat endurance is good, whole
Body structure is indeformable；
Steam or remaining hot water are passed through into horizontal pipeline 10 and pipe tunnel 8 multi-functional bimodal slab anode is discharged into go and added
Heat, slab anode plate row's heat-conducting efficiency speed is fast, and the thermal efficiency is high, and board-like main body 9 is heated evenly, the control electric field that can stablize
The change of interior 90 ± 5 DEG C of adaptation bitumen flue gas softening points of dust constaining temperature degree, it is ensured that the permanent high-efficient purification of bitumen flue gas.
The geometry of multi-functional bimodal slab anode row also has the trickling for being easy to pitch, easy blowdown, does not scab, does not tie
Knurl, easy cleaning.
See Fig. 8-Fig. 9, cathod system uses rib type line and square line；Have on four corners of rib type line total length very big
Radius of curvature, compares with round wires, and rigid is good, and discharge inception voltage is low, and corona current is big.Square line it put with the tip of corner
Electricity, strength of discharge is high, and discharge inception voltage is high, and corona current is big, and four corners of square line tip can produce it is strong from
Electric wind in subflow, increase electrical tar precipitator electric field, weakens and prevents corona blocking, with very strong release electric charge function,
Strength of discharge is big, and no-spark electric discharge slope is high, and discharge voltage is high.Match somebody with somebody with multifunctional assembled bimodal slab anode plate row pole, electricity
Field intensity E ＞ 3.0KV/cm, anode row's surface current density is uniform, and asphalt smoke chargeability is high, and smooth performance is good, is not likely to produce
Scab and shelf depreciation flashover, it is ensured that efficiency of dust collection is stable, reliable.Its section of rib type line and square line of the present utility model
Product is 6mm × 6mm.
See Figure 10, Figure 11, described cathod system uses major insulation overhung construction, the master that the structure includes upper end is exhausted
The suspension apparatus of edge incubator 16, high insulating protective cover 14 and lower end, high insulating protective cover 14 is arranged on major insulation incubator 16
Between suspension apparatus.
The cavity 15 that height is 1m~1.5m is provided with the bottom of the major insulation incubator 16, in major insulation incubator
16 top is provided with heater 17, is incubated in major insulation at the cavity 15 of lower box part and is also equipped with heater.
The air in major insulation incubator 16 and cavity 15 is heated by heater, makes major insulation incubator 16
And the air themperature in cavity 15 is consistently higher than the flue-gas temperature of lower end, the flue gas that lower end is flowed by negative pressure is formed it is micro- just
Pressure, constitutes dynamic thermally-stabilised sealing, prevents bottom flue gas and ascend into major insulation incubator 16, high insulating protective cover 14
Play a part of insulating to flue gas choked flow simultaneously.
See Figure 12, suspension apparatus includes bolt 20, nut 21, pressing plate 19, cathode frame 13 by bolt 20, nut 21,
Pressing plate 19 is hung on the steel channel beam 18 of the high lower end of insulating protective cover 14
See Figure 13-Figure 15, the upper end of the spray cooler 1 is provided with two-way atomising device, two-way atomising device is set
Two spray pipings 24,25, are provided with demister 22 between two spray pipings above and below being set to, at the bottom of spray cooler 1
Portion is provided with gas collecting apparatus.
Two-way atomising device includes upper spray piping 24, lower spray piping 25, compressed air piping, waterpipe, upper spray
Pipeline 24 and lower spray piping 25 are set down in spray cooler 1, the upper connecting water pipe of spray piping 24, lower spray piping
25 connect compressed air piping and waterpipe simultaneously, and lower spray piping 25 carries out spray-chilling, upper spray piping to flue gas
24 pairs of demisters 22 carry out cleaning showers.
The gas collecting apparatus includes airflow-distribution board 28, exhanst gas outlet pipeline 27, ash bucket, hot coal oil heater 29, gas
Flow point fabric swatch 28 is arranged on the upper end of ash bucket, and exhanst gas outlet pipeline 27 is arranged on the centre position of airflow-distribution board 28, in product
The lower end of ash bucket is provided with hot coal oil heater 29, and the bottom of ash bucket is provided with pitch blowoff valve 30.
Hot coal oil heater 29 includes oiling device 29-1, electric heater unit 29-3, by oiling device 29-1 to hot coal
Oil heater 29 injects kerosene, and temperature sensor 23 is also equipped with hot coal oil heater 29.
See Figure 21, described electrical tar precipitator 2 sets quantity to be 2, by the way of matching somebody with somebody using hybrid pole, one wherein
1 is set in electrical tar precipitator 2#With 2#Two electric fields, 3 are set in another electrical tar precipitator 2#With 4#Two electric fields, 1#With
3#Electric field uses multifunctional assembled bimodal slab anode deploying square line cathode, 2#With 4#Electric field is using multifunctional assembled double
Peak slab anode deploying rib type line cathode.
See Figure 16-Figure 19, oily dirt separator, oily dirt separator are provided with the smoke inlet of the electrical tar precipitator 2
Including deflector type airflow-distribution board 33, G types airflow-distribution board 34, ash bucket 35, ash bucket 35 is arranged on the lower end of oily dirt separator, folding
Streaming airflow-distribution board 33 and G types airflow-distribution board 34 arrange that G types airflow-distribution board 34 is wrapped from smoke inlet direction in tandem
It is delthyrium to include the hole on the airflow-distribution board of several different pore sizes and percent opening, deflector type airflow-distribution board 33.G type air-flows
Distribution grid 34 is that multiple airflow-distribution boards are arranged before and after, and the aperture and percent opening on each airflow-distribution board are different from.
Oily dirt separator is set in the porch of electrical tar precipitator 2, the solid-state dust granules in flue gas can be efficiently separated,
So that 80% dust is captured down before electric field is entered.The connection of hot water injection's pipeline is also provided with oily dirt separator
Hot cleaner main pipeline 37, meanwhile, hermetically sealed pitch blowdown is provided with the ash discharging hole of the ash bucket 35 of electrical tar precipitator 2
Valve, it is ensured that the dust that electrical tar precipitator 2 is trapped timely and effectively is discharged, while leading into oily dirt separator and ash bucket 35
Enter hot water to be cleaned, it is to avoid spontaneous combustion after cohesion is heaped in electric field.
In order to control the generation of Xu Ran phenomenons, electrical tar precipitator 2 is provided with multiple temperature monitoring points, and in electrically trapped tar oil
The import and export of device 2 are all provided with the top of temperature monitoring point, each electric field and are provided with 1 temperature sensor, on each ash bucket 35
There is provided 2 temperature sensors.Meanwhile, automatic control system displays temperature jump signal Δ t >=10 DEG C as may burning-point
Basis for estimation.If during temperature jump signal △ t >=10 DEG C, being passed through cold water into hot cleaner main pipeline 37, opening
The explosion-proof pattern of dynamic fire-fighting fire extinguishing.
See Figure 20, the desulfurization defluorinate device 4 includes pond, air inlet pipe 44, shower 43, demister 22, and pond is set
In the bottom of desulfurization defluorinate device 4, spray equipment 40 is provided with the porch of air inlet pipe 44, the exhanst gas outlet of air inlet pipe 44 is stretched
Enter in pond, demister 22 and shower 43 are set gradually from top to bottom in the top of desulfurization defluorinate device 4, shower 43 passes through
Water pump 45 is connected with pond, and pond is additionally provided with discharge outlet and water supplement port.The discharge outlet in pond is connected with gutter 42, and in water
Cutting-off controlling valve 47 is set at the discharge outlet in pond, water-level gauge is set in pond, the water level in pond is automatically controlled.Pond passes through
Gutter 42 connects four box advection sewage-treatment plants 32.Pond is also connected with alkali lye pulping equipment 41 simultaneously, leads into pond
Enter the MgO aqueous solution, the acid-base value of equalizing reservoir reclaimed water is provided with pH value sensor in pond, to detect and control MgO water
The intake of solution.
MgO generates Mg (OH) after being dissolved in water2, Mg (OH)2It is used as desulfurizing agent and H2SO3(SO2+H2O=H2SO3) reaction life
Into MgSO3, recyclable to recycle, the clean water being neutralized is discharged into gutter 42.
It is a kind of ultralow to baking flue gas progress purification using described carbon anode roasting gas cleaning minimum discharge system
The technique of discharge, it is specific as follows：
See Figure 21, the flue gas from calcination department enters from the smoke inlet of the upper end of spray cooler 1, and flue gas passes through demisting
After the pre- dust removal and filtration of device 22, operation downwards, the upper spray piping 24 of the upper end of demister 22 carries out spray washing to demister 22,
The water fog particle that the lower spray piping 25 of the lower end of demister 22 sprays is 20~40 μm, high-temperature flue gas is carried out fully with water smoke
Contact and carry out heat exchange, flue gas is washed through water smoke, cooled down, and with water smoke condense, the flue gas washed through water smoke, cooled down entrainment of
Dust granule and the pitch condensed enter the gas collecting apparatus of bottom, and after the filter bypass of airflow-distribution board 28, flue gas is from outlet
Flue is discharged, into electrical tar precipitator 2；Washed and the pitch and dust granule that tentatively filter down are from gas collecting apparatus bottom
Pitch blowoff valve 30 is discharged, and hot coal oil heater 29 carries out heating to ash bucket can prevent pitch cooled and solidified；
Flue gas initially enters the deflector type airflow-distribution board 33 in the oily dirt separator of electrical tar precipitator 2, oily dirt separator
The part solid-state dust granules in flue gas are separated from flue gas with G types airflow-distribution board 34, the dust separated falls
Enter the ash bucket 35 of oily dirt separator lower end and discharge；Flue gas then enters in the electric field of electrical tar precipitator 2, is removed through electrical tar precipitator 2
Flue gas after dirt enters desulfurization defluorinate device 4 by smoke exhaust fan 3；
The spray equipment 40 for the first porch of air inlet pipe 44 through desulfurization defluorinate device 4 of flue gas discharged from electrical tar precipitator 2
Spraying cooling, makes flue gas be down to 30 DEG C by 80 DEG C, subsequently into sufficient water-bath is carried out with water in pond, is carried out after dissolving with water
Water temperature in reaction, pond is maintained at 20 DEG C~24 DEG C, washing of the flue gas by pond reclaimed water, by the SO remained in flue gas2、F
Gu () and nitride are cleaned, discharge, washed again through shower water then up, further absorb remaining a small amount of in flue gas
Sulfide, fluoride, the clean flue gas after repeated washing is finally by the filtering again of demister 22, further smoke-purifying
Tar, dust in gas, eventually enter into chimney 5 and are discharged into air；
The hot cleaner set in electrical tar precipitator 2, is divided into heat water-spraying and cold water spray, heat water-spraying can be with
Cleaning showers are carried out to electric field, cold water spray is fire-fighting spraying；The hot cleaner is in oily dirt separator, electrically trapped tar oil simultaneously
Hot wash pipeline is both provided with the ash bucket of device lower end, realizes and the hot water of oily dirt separator, electrical tar precipitator ash bucket is cleaned；
In whole flue gas emission, multiple spot sets temperature sensor, and (key position of flue gas emission for example sprays
Drench cooler, electrical tar precipitator, at the entrance and exit of desulfurization defluorinate device, calcining kiln exit, the exit of blowdown is all provided with
It is equipped with temperature sensor), 150 DEG C ± 5 DEG C of default point temperatures are the fiducial temperature of the system, are appointed when detecting in system
During temperature jump Δ t >=10 DEG C of meaning test point, temperature sensor is sent in accident alarming command signal, electrical tar precipitator 2
Cold water fire-fighting spraying starts, and is passed through into system pipeline steam.
A kind of carbon anode roasting gas cleaning minimum discharge system of the utility model and technique can realize dedusting flue gas
Discharge index reaches following national standard：
Particulate matter dust≤3mg/m3
Tarvia≤10mg/m3
SO2≤100mg/m3
Gu fluorine≤2mg/m3
Nitride≤100mg/m3
The μ g/100m of strong carcinogen benzo (α) pyrene≤1.03。
Claims (9)
1. a kind of carbon anode roasting gas cleaning minimum discharge system, including spray cooler, electrical tar precipitator, desulfurization defluorinate
Device, the flue gas output end of spray cooler connects the smoke inlet of electrical tar precipitator, and the exhanst gas outlet of electrical tar precipitator passes through
Smoke exhaust fan connects the smoke inlet of desulfurization defluorinate device；Characterized in that, the anode system in the electrical tar precipitator is used
Multifunctional assembled bimodal slab anode row, cathod system uses rib type line and square line；Heat is provided with electrical tar precipitator
Water washing device.
2. a kind of carbon anode roasting gas cleaning minimum discharge system according to claim 1, it is characterised in that described
Multifunctional assembled bimodal slab anode row is formed by fixedly connecting by several multi-functional bimodal slab anode rows, many work(
Can bimodal slab anode row include board-like main body, horizontal pipeline, pipe tunnel, horizontal pipeline is arranged on up and down the two of board-like main body
End, pipe tunnel is longitudinally disposed board-like main body, is interconnected between horizontal pipeline and pipe tunnel, in the outer of pipe tunnel
The steel plate that a layer cross section is triangle is wrapped up in side, and an angle of triangle is arranged in board-like main body, and two other angle is from board-like
The plate face of main body is outwardly formed projection.
3. a kind of carbon anode roasting gas cleaning minimum discharge system according to claim 1, it is characterised in that described
Cathod system use major insulation overhung construction, the major insulation incubator of the structure including upper end, high insulating protective cover and
The suspension apparatus of lower end, high insulating protective cover is arranged between major insulation incubator and suspension apparatus.
4. a kind of carbon anode roasting gas cleaning minimum discharge system according to claim 3, it is characterised in that in institute
The bottom for stating major insulation incubator is provided with the cavity that height is 1m~1.5m, and the top of major insulation incubator is provided with heating
Device, is incubated at the cavity of lower box part in major insulation and is also equipped with heater.
5. a kind of carbon anode roasting gas cleaning minimum discharge system according to claim 1, it is characterised in that in institute
The upper end for stating spray cooler is provided with two-way atomising device, two-way atomising device be set to above and below two spray pipings, two
Demister is installed between individual spray piping, the bottom of spray cooler is provided with gas collecting apparatus.
6. a kind of carbon anode roasting gas cleaning minimum discharge system according to claim 5, it is characterised in that described
Gas collecting apparatus includes airflow-distribution board, exhanst gas outlet pipeline, ash bucket, hot coal oil heater, and airflow-distribution board is arranged on dust stratification
The upper end of bucket, exhanst gas outlet pipeline is arranged on the centre position of airflow-distribution board, and hot coal oil is provided with the lower end of ash bucket and is added
Hot device, pitch blowoff valve is provided with the bottom of ash bucket.
7. a kind of carbon anode roasting gas cleaning minimum discharge system according to claim 1, it is characterised in that described
Electrical tar precipitator set quantity be 2, set 1 in wherein one electrical tar precipitator#With 2#Two electric fields, at another
3 are set in electrical tar precipitator#With 4#Two electric fields, 1#With 3#Electric field uses multifunctional assembled bimodal slab anode deploying square
Line cathode, 2#With 4#Electric field uses multifunctional assembled bimodal slab anode deploying rib type line cathode.
8. a kind of carbon anode roasting gas cleaning minimum discharge system according to claim 1 or 7, it is characterised in that
Oily dirt separator is provided with the smoke inlet of the electrical tar precipitator, oily dirt separator includes deflector type airflow-distribution board, G
Type airflow-distribution board, ash bucket, ash bucket are arranged on the lower end of oily dirt separator, deflector type airflow-distribution board and G type airflow-distribution boards
Arranged in tandem from smoke inlet direction, G types airflow-distribution board includes the air flow method of several different pore sizes and percent opening
Hole on plate, deflector type airflow-distribution board is delthyrium.
9. a kind of carbon anode roasting gas cleaning minimum discharge system according to claim 1, it is characterised in that described
Desulfurization defluorinate device includes pond, air inlet pipe, shower, demister, the entrance of air inlet pipe is provided with spray equipment, pond is set
Put in the bottom of desulfurization defluorinate device, the exhanst gas outlet of air inlet pipe is stretched into pond, in the top of desulfurization defluorinate device from up to
Under set gradually demister and shower, shower is connected by water pump with pond, and pond is additionally provided with discharge outlet and water supplement port.
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| CN201720020409.9U CN206492351U (en) | 2017-01-09 | 2017-01-09 | A kind of carbon anode roasting gas cleaning minimum discharge system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731407A (en) * | 2017-01-09 | 2017-05-31 | 高国纯 | A kind of carbon anode roasting gas cleaning minimum discharge system and technique |
| CN108955278A (en) * | 2018-05-14 | 2018-12-07 | 中国铝业股份有限公司 | A kind of Purification Processes for Charcoal Anode of Al Reduction Cell processing method |
-
2017
- 2017-01-09 CN CN201720020409.9U patent/CN206492351U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106731407A (en) * | 2017-01-09 | 2017-05-31 | 高国纯 | A kind of carbon anode roasting gas cleaning minimum discharge system and technique |
| CN108955278A (en) * | 2018-05-14 | 2018-12-07 | 中国铝业股份有限公司 | A kind of Purification Processes for Charcoal Anode of Al Reduction Cell processing method |
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