CN209423310U - A kind of system of ultra-clean processing method that implementing electrolytic aluminium carbon anode roasting flue gas - Google Patents
A kind of system of ultra-clean processing method that implementing electrolytic aluminium carbon anode roasting flue gas Download PDFInfo
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- CN209423310U CN209423310U CN201821744762.2U CN201821744762U CN209423310U CN 209423310 U CN209423310 U CN 209423310U CN 201821744762 U CN201821744762 U CN 201821744762U CN 209423310 U CN209423310 U CN 209423310U
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Abstract
The utility model relates to a kind of systems of ultra-clean processing method for implementing electrolytic aluminium carbon anode roasting flue gas, the system comprises flue gas pretreatment system, electrical tar precipitator, oxidative system and the pneumatic purification systems of wet process, the outlet of the flue gas pretreatment system is connected setting with the entrance of electrical tar precipitator, the outlet of the electrical tar precipitator is connected setting with the entrance of the pneumatic purification system of the wet process by intermediate flue, and the intermediate flue is equipped with oxidative system.Tthe utility model system is provided with electrical tar precipitator, particularly, it is pre-processed before the electrical tar precipitator of this system using two-fluid spray head, electrical tar precipitator uses vertical honeycomb formula multistage electric field, and power supply is high-voltage pulse power source, it is more preferable to fluoride and glance coal effect.
Description
Technical field
The utility model belongs to environmental technology field, is related to the ultra-clean process route of carbon baking flue gas and method, especially
It is a kind of system of ultra-clean processing method for implementing electrolytic aluminium carbon anode roasting flue gas.
Background technique
Electrolytic aluminium carbon anode roasting is carbon green article after molding in roaster, is protected by certain medium
Shield carries out high-temperature heat treatment by certain temperature requirement, makes the binder coking in green article in the absence of air conditions
Charing, and particles of aggregates is consolidated to integral technical process.Contain petroleum coke, coal tar pitch, anode in the ingredient of green anode, because
This carbon anode roasting burning smoke components are complex, and major pollutants include particulate matter (50mg/m3)、SO2(100-
300mg/m3)、NO(50-120mg/m3) fluoride (50mg/m3) and glance coal (185mg/m3), multiple pollutant discharge is exceeded.
Therefore, exploitation alkali element anode burns flue gas multiple pollutant untied simulated techniques, realizes SO in flue gas2, fluoride and Zhejiang blueness cigarette connection
Removing is closed, is of great significance.
Current electrolysis aluminium carbon anode roasting flue gas generally only carries out fluoride, and glance coal is administered, such as electrical tar precipitator,
Aluminium oxide dry method absorption method.In addition, it is also concatenated using two methods of electrical tar precipitator and aluminium oxide Dry Adsorption at present, this
Two methods still can not achieve comprehensive removing.
By retrieval, patent publication us relevant to the utility model patent application is not yet found.
Summary of the invention
The purpose of the utility model is to overcome in place of the deficiencies in the prior art, carbon baking flue gas multiple pollutant is overcome
Exceeded problem provides a kind of system of ultra-clean processing method for implementing electrolytic aluminium carbon anode roasting flue gas, this method innovation
Ground proposes to administer the flue gas combined control technology of electrolytic aluminium carbon anode roasting, realizes multiple pollutant and combine removing, the system
It can be used in dedirt desulphurization denitration defluorinate depitching cigarette integrated purifying process aspect, effect can be removing carbon baking
Major pollutants in flue gas include particulate matter, SO2, NO, fluoride and glance coal.
The utility model solves its technical problem and adopts the following technical solutions to achieve:
A kind of system of ultra-clean processing method that implementing electrolytic aluminium carbon anode roasting flue gas, it is pre- that the system comprises flue gases
Processing system, electrical tar precipitator, oxidative system and the pneumatic purification system of wet process, the outlet and electric fishing of the flue gas pretreatment system
The entrance of tar device is connected setting, and the outlet of the electrical tar precipitator and the entrance of the pneumatic purification system of the wet process pass through centre
Flue is connected setting, which is equipped with oxidative system；
The flue gas pretreatment system can be cooled down electrolytic aluminium carbon anode roasting flue gas, agglomerate after generate liquid
Tarvia, the oxidative system can to after electrical tar precipitator is handled flue gas carry out oxidation operation, the wet process is pneumatically net
Change system can remove dust in flue gas, SO2, high-valence state NO, fluoride and glance coal.
Moreover, the flue gas pretreatment system includes water pump, air accumulator, conveyance conduit, spray gun, PC control system and water storage
Tank, the input terminal of the water pump are connected setting with water tank, and the output end of the water pump is connected with spray gun by conveyance conduit
Setting, the air accumulator are also connected with spray gun setting, and the PC control system is also connected with spray gun setting, which, which controls, is
System can control the movement of spray gun；
Alternatively, the oxidative system includes oxidant supply or Preparation equipment, dilution air, surge tank, distributor and dilute
Air storage tank is released, the output end of the diluent air air accumulator, which is connected by dilution air with the input terminal of surge tank, to be set
Set, the output end of oxidant supply or Preparation equipment is also connected with the input terminal of surge tank setting, the surge tank it is defeated
Outlet is connected setting with distributor；
Alternatively, the electrical tar precipitator is vertical honeycomb formula multistage electric field, and power supply is high-voltage pulse power source；
Alternatively, the pneumatic purification system of wet process include absorbent storehouse, for slurry equipment, slurry nozzle, pneumatic reaction tower and
Air inlet, the output end in the absorbent storehouse for slurry equipment with the bottom of pneumatic reaction tower by being connected setting, the Aerodynamic Inverse
It answers the bottom of tower to be arranged and absorbs slurries section, slurry nozzle is set on the pneumatic reaction tower absorbed above slurries section, the slurries
Nozzle can spray slurries into pneumatic reaction tower below by pumping the setting that is connected with serum storage tank, the slurry nozzle,
It is connected on pneumatic reaction tower between the slurry nozzle and absorption slurries section and air inlet is set, the top of the pneumatic reaction tower
It is connected and gas outlet is set.
Moreover, the spray gun uses double-current spray gun body, two-fluid spray nozzle is provided on the spray gun；
Alternatively, multilayer is arranged in interval to the slurry nozzle along the vertical direction in pneumatic reaction tower, every layer in the horizontal direction
Interval setting is multiple, is set to the coaxial arrangement Pneumatic desulphurization list pneumatic reaction tower between uppermost two layers of slurry nozzle Nei
Member；
Alternatively, the interior coaxial arrangement electrostatic cyclone defogger of pneumatic reaction tower between the slurry nozzle, gas outlet.
Moreover, the gaseous fluid of the two-fluid spray nozzle using air, in inert gas it is one or more or carry out simultaneously.
Moreover, the cathode line in the electrical tar precipitator uses small-sized stainless steel tube material.
The advantages of the utility model obtains and good effect are:
1, it proposes to the utility model method innovation to administer the flue gas combined control technology of electrolytic aluminium carbon anode roasting, realize
Multiple pollutant joint removing.
2, Tthe utility model system can be used in dedirt desulphurization denitration defluorinate depitching cigarette integrated purifying process aspect,
It includes particulate matter, SO2, NO, fluoride and glance coal that it, which acts on the major pollutants that can be in removing carbon baking flue gas,.
3, Tthe utility model system is provided with electrical tar precipitator, particularly, using double fluid before the electrical tar precipitator of this system
Body spray head is pre-processed, and electrical tar precipitator uses vertical honeycomb formula multistage electric field, and power supply is high-voltage pulse power source, to fluorination
Object and glance coal effect are more preferable.
4, the flue gas pretreatment system of this system cools down to electrolytic aluminium carbon annode flue gas, and flue-gas temperature is down to 80-
100 DEG C, glance coal is undergone phase transition, and is changed into liquid by gaseous state.Droplet-like coal tar be more advantageous to electrical tar precipitator catch and.By
Flue gas after electrical tar precipitator removes glance coal, then carries out oxidation operation, and the NO of lower valency is oxidized to high-valence state NO, finally passes through
The pneumatic purification device of wet process, the lye in the pneumatic purification device of wet process wash flue gas, can remove the SO2 and height in flue gas
Valence state NO, fluoride, Pneumatic desulfuration unit and electrostatic cyclone defogger in the pneumatic purification device of wet process can effectively remove powder
The glance coal that dirt and front device do not remove.A series of designs are final to realize that multiple pollutant removes comprehensively, the ultra-clean processing of flue gas
It is not stranghtforward, each system coordination cooperation is needed, each system all optimization designs could really realize ultra-clean target.This reality
With novel exactly in line with this original intention, progress greatly each Optimized System Design, and each step is done things steadily and surely, and finally realizes ultra-clean target, originally sets
Meter is in major pollutants particulate matter (50mg/m3)、SO2(100-300mg/m3)、NO(50-120mg/m3) fluoride (50mg/m3)
With glance coal (185mg/m3) under the conditions of, it can be achieved that purification after major pollutants particulate matter (≤5mg/m3)、SO2(≤20mg/
m3)、NO(≤35mg/m3) fluoride (≤5mg/m3) and glance coal (≤10mg/m3)。
5, the flue gas pretreatment system of this system is controlled by PC system, monitors pretreated flue-gas temperature, adjusts water
The conveying capacity of pump and air accumulator, water and gas phase stream are transported to double-current spray gun body simultaneously, cool down to flue gas.It can be on the spray gun
It is provided with two-fluid spray nozzle, the size droplet diameter of the ejection of double-current spray gun body is more concentrated, uniformly, and flue gas cool-down pretreatment is more advantageous to
Effect.
6, to be oxidant be transported to distributor by dilution to the oxidative system of this system, oxidant and flue gas after diluting
In lower valency NO reaction, generate high-valence state NO, so as to the removing of the pneumatic purification system of rear portion wet process, oxidant be hydrogen peroxide,
Ozone, persulfate, peroxide, potassium bichromate, potassium permanganate, chlorate any one or at least two combination, it is excellent
Change design and is more advantageous to lower valency NO oxidation.
7, alkaline absorbent is deposited in the absorbent storage in the wet cleaning system of this system, and absorbent falls into slurry feeding device
In, alkaline scavenger is generated, the bottom of pneumatic reaction tower is driven by slurry feeding device, bottom absorbent gets to reaction by pump
At the slurry nozzle on tower top, alkaline scavenger is sprayed from top, is washed to flue gas, to realize gas cleaning.
Pneumatic desulfuration unit and electrostatic cyclone defogger can be set in this system.There is removing effect compared with other Wet purifiers
Fruit is more preferable, removes more thorough advantage.
Detailed description of the invention
Fig. 1 is the structure connection diagram of Tthe utility model system；
Fig. 2 is the structure connection diagram of flue gas pretreatment system in Fig. 1；
Fig. 3 is the structure connection diagram of oxidative system in Fig. 1；
Fig. 4 is the structure connection diagram of the pneumatic purification system of wet process in Fig. 1.
Specific embodiment
Below with reference to by specific embodiment, the utility model is described in further detail, following embodiment is descriptive
, it is not restrictive, protection scope of this utility model cannot be limited by this.
The structure that the utility model is not described in detail specifically can be understood as the conventional structure of this field.
A kind of ultra-clean processing method of electrolytic aluminium carbon anode roasting flue gas, steps are as follows:
(1) the electrolytic aluminium carbon anode roasting flue gas is pre-processed, generate liquid bitumen tar after cooling cohesion；
(2) through step, (1) pretreated flue gas carries out electrically trapped tar oil, removes liquid bitumen tar；
(3) the flue gas after step (2) electrically trapped tar oil is aoxidized；
(4) the flue gas after (3) step being aoxidized carries out wet cleaning, removes dust, SO in flue gas2, high-valence state NO, fluoride
And glance coal, it is purified rear flue gas.
Preferably, the step (1) in pretreatment carried out in two-fluid spray nozzle course of injection.
Preferably, the step (1) in cooling method using water spray, in jet two ways it is a kind of or carry out simultaneously.
Preferably, the step (1) in cooling after flue gas temperature be 80~100 DEG C.
Preferably, the step (2) in electrically trapped tar oil carried out in electrical tar precipitator.
Preferably, the step (3) in oxidation carried out in oxidative system.
Preferably, the step (3) in oxidation when the oxidant that uses carry out, the oxidant is hydrogen peroxide, ozone, mistake
Sulfate, peroxide, potassium bichromate, potassium permanganate, chlorate any one or at least two combination.
Preferably, the step (4) in wet cleaning carried out in the pneumatic purification system of wet process.
Preferably, the step (4) in wet cleaning when using absorbent carry out, the absorbent be agstone, oxidation
Calcium powder, magnesia, sodium hydroxide solution any one or at least two combination.
Implement the system of the ultra-clean processing method of electrolytic aluminium carbon anode roasting flue gas as described above, as shown in Figure 1, institute
The system of stating includes that flue gas pretreatment system 1, electrical tar precipitator 2, oxidative system 3 and the pneumatic purification system 4 of wet process, the flue gas are pre-
The outlet of processing system is connected setting with the entrance of electrical tar precipitator, and the outlet of the electrical tar precipitator and the wet process are pneumatically net
The entrance of change system is connected setting by intermediate flue (unlabeled in figure), and the intermediate flue is equipped with oxidative system；
The flue gas pretreatment system can be cooled down electrolytic aluminium carbon anode roasting flue gas, agglomerate after generate liquid
Tarvia, the oxidative system can to after electrical tar precipitator is handled flue gas carry out oxidation operation, the wet process is pneumatically net
Change system can remove dust in flue gas, SO2, high-valence state NO, fluoride and glance coal.
The flue gas pretreatment system of this system cools down to electrolytic aluminium carbon annode flue gas, and flue-gas temperature is down to 80-100
DEG C, glance coal is undergone phase transition, and is changed into liquid by gaseous state.Droplet-like coal tar be more advantageous to electrical tar precipitator catch and.By electricity
Flue gas after catching tar device removes glance coal, then carries out oxidation operation, and the NO of lower valency is oxidized to high-valence state NO, finally through overly moist
The pneumatic purification device of method, the lye in the pneumatic purification device of wet process wash flue gas, can remove SO2 and high price in flue gas
State NO, fluoride, Pneumatic desulfuration unit and electrostatic cyclone defogger in the pneumatic purification device of wet process can effectively remove dust
And the glance coal that front device does not remove.A series of designs are final to realize that multiple pollutant removes comprehensively, and the ultra-clean processing of flue gas is not
It is stranghtforward, but needs each system coordination cooperation, each system all optimization designs could really realizes ultra-clean target.This is practical
Novel is exactly in line with this original intention, and progress greatly each Optimized System Design, and each step is done things steadily and surely, and finally realizes ultra-clean target, the design
In major pollutants particulate matter (50mg/m3)、SO2(100-300mg/m3)、NO(50-120mg/m3) fluoride (50mg/m3) and
Glance coal (185mg/m3) under the conditions of, it can be achieved that purification after major pollutants particulate matter (≤5mg/m3)、SO2(≤20mg/m3)、
NO(≤35mg/m3) fluoride (≤5mg/m3) and glance coal (≤10mg/m3)。
In the present embodiment, as shown in Fig. 2, the flue gas pretreatment system includes water pump 5, air accumulator 6, conveyance conduit 7,
Spray gun 8, PC control system 9 and water tank 10, the input terminal of the water pump are connected setting with water tank, the output end of the water pump
Be connected setting with spray gun by conveyance conduit, the air accumulator is also connected with spray gun setting, the PC control system also with
Spray gun is connected setting, which can control the movement of spray gun.
The flue gas pretreatment system of this system is controlled by PC system, monitors pretreated flue-gas temperature, adjusts water pump
With the conveying capacity of air accumulator, water and gas phase stream are transported to double-current spray gun body simultaneously, cool down to flue gas.It can be set on the spray gun
It is equipped with two-fluid spray nozzle, the size droplet diameter of the ejection of double-current spray gun body is more concentrated, uniformly, and flue gas cool-down pretreatment effect is more advantageous to
Fruit.
More preferably, the spray gun uses double-current spray gun body, is provided with two-fluid spray nozzle, the spray of double-current spray gun body on the spray gun
Size droplet diameter out is more concentrated, uniformly, and flue gas cool-down pretreating effect is more advantageous to；More preferably, the gas of the two-fluid spray nozzle
Air, one or more in inert gas or carry out simultaneously can be used in phase fluid.Cooperate with water, flue gas is pre-processed.
In the present embodiment, the electrical tar precipitator is vertical honeycomb formula multistage electric field, and power supply is high-voltage pulse power source,
It catches and efficiency is more preferable.More preferably, the cathode line in the electrical tar precipitator uses small-sized stainless steel tube material, stainless steel tube material
Cathode line is shaken caused by can avoid because of exhaust gas volumn variation, is substantially reduced accident, is kept field strength more stable.
In the present embodiment, as shown in figure 3, the oxidative system includes oxidant supply or Preparation equipment 11, dilution wind
The output end of machine 12, surge tank 13, distributor 14 and diluent air air accumulator 15, the diluent air air accumulator passes through dilution wind
Machine is connected setting with the input terminal of surge tank, the output end of the oxidant supply or Preparation equipment also with the input of surge tank
End is connected setting, and the output end of the surge tank is connected setting with distributor.
The oxidative system of this system, which is oxidant, is transported to distributor by dilution, in the oxidant and flue gas after diluting
Lower valency NO reaction, generate high-valence state NO, so as to the removing of the pneumatic purification system of rear portion wet process, oxidant is hydrogen peroxide, smelly
Oxygen, persulfate, peroxide, potassium bichromate, potassium permanganate, chlorate any one or at least two combination, optimization
Design is more advantageous to lower valency NO oxidation.
In the present embodiment, as shown in figure 4, the pneumatic purification system of the wet process include absorbent storehouse 16, for slurry equipment 17,
The output end of slurry nozzle 18, pneumatic reaction tower 19 and air inlet 20, the absorbent storehouse passes through for slurry equipment and pneumatic reaction
The bottom of tower is connected setting, and the bottom setting of the pneumatic reaction tower absorbs slurries section (not shown), the absorption slurries
Slurry nozzle is set on the pneumatic reaction tower of Duan Shangfang, which is connected by pump with serum storage tank (being not shown in figure)
Setting is connect, which can spray slurries, the slurry nozzle and absorption slurries section into pneumatic reaction tower below
Between pneumatic reaction tower on be connected air inlet be set, be connected at the top of the pneumatic reaction tower and gas outlet be set (in figure not
Label).
Alkaline absorbent is deposited in absorbent storage in the wet cleaning system of this system, and absorbent is fallen into slurry feeding device,
Alkaline scavenger is generated, the bottom of pneumatic reaction tower is driven by slurry feeding device, bottom absorbent gets to reaction tower by pump
At the slurry nozzle on top, alkaline scavenger is sprayed from top, is washed to flue gas, to realize gas cleaning.This
Pneumatic desulfuration unit and electrostatic cyclone defogger can be set in system.With removal effect compared with other Wet purifiers
More preferably, more thorough advantage is removed.
More preferably, multilayer is arranged in interval to the slurry nozzle along the vertical direction in pneumatic reaction tower, and every layer along level side
It is multiple to interval setting, it is set to the coaxial arrangement Pneumatic desulphurization pneumatic reaction tower between uppermost two layers of slurry nozzle Nei
Unit 21.More preferably, the Pneumatic desulfuration unit can be gas disclosed in the patent No. 200710175802.6,101406805B
Dynamic desulfurization unit, the Pneumatic desulfuration unit include serving of being from top to bottom successively arranged after blending gas-liquid and rising discharges and purify
The blending container of gas passage effect acts the cyclone for changing air-flow rotation direction and plays gas access and serum outlet
Cone cover, blending container and cyclone, cyclone and cone cover pass through bolt or welded connecting.The utility model has structure letter
Singly, the characteristics of being easily worked, and Wet FGD can be made with liquid-gas ratio is small, resistance is small, mixing intensity is big, removal efficiency
High advantage avoids because of system shutdown caused by water consume is excessive, therefore reduces operation and maintenance cost, is suitable for various works
The improvement of industry tail gas.
More preferably, electrostatic cyclone defogger is coaxially disposed in the pneumatic reaction tower between the slurry nozzle, gas outlet
22.More preferably, the electrostatic cyclone defogger can be that the electrostatic eddy flow disclosed in the patent No. 201510751079.6 removes
Mist device, the device are made of one or several electrostatic eddy flow demisting units, each electrostatic eddy flow demisting unit include cylinder,
Guide vane, deflector, metal discharge line composition, flue gas to be processed enter device from bottom to top, form rotation uprising gas, together
When body centre be arranged metal discharge line, bucket cornice high pressure positive electricity, so that the drop in flue gas is separated with flue gas.
It is de- that the system of the ultra-clean processing method of above-mentioned implementation electrolytic aluminium carbon anode roasting flue gas can be used in dedirt desulfurization
In nitre defluorinate depitching cigarette integrated purifying process aspect, effect can be the major pollutants in removing carbon baking flue gas
Including particulate matter, SO2, NO, fluoride and glance coal.
Although disclosing the embodiments of the present invention for the purpose of illustration, it will be appreciated by those skilled in the art that:
Do not departing from the utility model and spirit and scope of the appended claims, various substitutions, changes and modifications be all it is possible,
Therefore, the scope of the utility model is not limited to the embodiment disclosure of that.
Claims (4)
1. a kind of system for the ultra-clean processing method for implementing electrolytic aluminium carbon anode roasting flue gas, it is characterised in that: the system
Including flue gas pretreatment system, electrical tar precipitator, oxidative system and the pneumatic purification system of wet process, the flue gas pretreatment system
Export the setting that is connected with the entrance of electrical tar precipitator, the outlet of the electrical tar precipitator and entering for the pneumatic purification system of the wet process
Mouthful it is connected setting by intermediate flue, the intermediate flue is equipped with oxidative system；
The flue gas pretreatment system can be cooled down electrolytic aluminium carbon anode roasting flue gas, agglomerate after generate liquid bitumen
Tar, the oxidative system can be to the flue gas progress oxidation operations after electrical tar precipitator is handled, and the wet process, which pneumatically purifies, is
System can remove dust in flue gas, SO2, high-valence state NO, fluoride and glance coal；
The flue gas pretreatment system includes water pump, air accumulator, conveyance conduit, spray gun, PC control system and water tank, the water
The input terminal of pump is connected setting with water tank, and the output end of the water pump and spray gun are connected setting by conveyance conduit, described
Air accumulator is also connected with spray gun setting, and the PC control system is also connected with spray gun setting, which can control
The movement of spray gun processed；
The oxidative system includes oxidant supply or Preparation equipment, dilution air, surge tank, distributor and diluent air gas storage
Tank, the output end of the diluent air air accumulator are connected setting by dilution air with the input terminal of surge tank, the oxidation
The output end of agent supply or Preparation equipment is also connected with the input terminal of surge tank setting, the output end and distributor of the surge tank
Be connected setting；
The electrical tar precipitator is vertical honeycomb formula multistage electric field, and power supply is high-voltage pulse power source；
The pneumatic purification system of wet process includes absorbent storehouse, for slurry equipment, slurry nozzle, pneumatic reaction tower and air inlet, institute
The output end in absorbent storehouse is stated by being connected with the bottom of pneumatic reaction tower setting for slurry equipment, the bottom of the pneumatic reaction tower
Setting absorbs slurries section, slurry nozzle is arranged on the pneumatic reaction tower absorbed above slurries section, which passes through pump
Be connected setting with serum storage tank, which can spray slurries, the slurries spray into pneumatic reaction tower below
It is connected on pneumatic reaction tower between mouth and absorption slurries section and air inlet is set, is connected setting at the top of the pneumatic reaction tower
Gas outlet.
2. the system of the ultra-clean processing method according to claim 1 for implementing electrolytic aluminium carbon anode roasting flue gas, special
Sign is: the spray gun uses double-current spray gun body, is provided with two-fluid spray nozzle on the spray gun；
Alternatively, multilayer is arranged in interval to the slurry nozzle along the vertical direction in pneumatic reaction tower, every layer horizontally spaced
It is arranged multiple, is set to the pneumatic reaction tower between uppermost two layers of slurry nozzle Nei coaxial arrangement Pneumatic desulfuration unit；
Alternatively, the interior coaxial arrangement electrostatic cyclone defogger of pneumatic reaction tower between the slurry nozzle, gas outlet.
3. the system of the ultra-clean processing method according to claim 2 for implementing electrolytic aluminium carbon anode roasting flue gas, special
Sign is: the gaseous fluid of the two-fluid spray nozzle using air, in inert gas it is one or more or carry out simultaneously.
4. the system of the ultra-clean processing method according to claim 1 for implementing electrolytic aluminium carbon anode roasting flue gas, special
Sign is: the cathode line in the electrical tar precipitator uses small-sized stainless steel tube material.
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