CN105080265A - Industrial tail gas recovery and recycle major cycle technology - Google Patents
Industrial tail gas recovery and recycle major cycle technology Download PDFInfo
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- CN105080265A CN105080265A CN201510056920.XA CN201510056920A CN105080265A CN 105080265 A CN105080265 A CN 105080265A CN 201510056920 A CN201510056920 A CN 201510056920A CN 105080265 A CN105080265 A CN 105080265A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
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Abstract
The invention discloses an industrial tail gas recovery and recycle major cycle technology. Through water-gas indirect heat exchange, boiler waste heat is utilized. Through boiling purification, dedusting and absorption purification are realized. Through water mist ammonia distillation dedusting, a catalyst is provided for a follow-up process and dedusting effects are obtained. Through fixed bed crossing purification, adsorbent adsorption functions and catalysis effects are obtained. Through water soluble method-based repeated desorption, adsorbate desorption is finished and a modification liquid is provided for adsorbent carriers. Through flowing air feeding purification, mixed adsorption, conversion, catalysis and oxidation of the adsorbent, adsorbate and oxidizing agent are realized. Through adsorbent adsorption and loading, the conventional gas-liquid chemical conversion is changed into solid-liquid conversion. Through a terminal purifier, alkali production based on an ammonia process is realized and sodium bicarbonate is produced. The technology realizes physical absorption, chemical conversion, loaded carrier catalysis and oxidation in the whole process by a simple method and simple equipment, realizes harmless use of hazardous substances in flue gas and realizes industrial tail gas recovery and recycle major cycle.
Description
Technical field:
The present invention relates to air purification field, particularly utilize adsorption technology in interface science field to catch the gas one purification method of the pernicious gases such as oxycarbide, oxysulfide, nitrogen oxide and smoke particle in industrial tail gas.
Background technology:
Industrial tail gas comprises the pernicious gas such as oxycarbide, oxysulfide, nitrogen oxide that the industry such as combustion of fossil fuel, oil refining, manufacture of cement and chemical synthesis manufacture and the micro dust particle mixed wherein, its huge generation not only directly causes environmental pollution, and constantly diffusion and accumulation form heat-insulation layer in atmosphere, cause terrestrial climate to warm, and then cause climate disaster.
Industries different at present takes different seizure and recovery method respectively for compositions different in emission gases, such as chemical transformation (comprises calcium method, sodium method, ammonia process etc.), physisorphtion, membrane separation process, oxygen-rich combustion method, laser catalysis method, electron beam is according to method, catalytic reduction method etc., but it is high that these methods all also exist equipment investment, many drawbacks that effect is single and operation cost is high, use these methods to the collection of various pernicious gas composition and conversion, other compositions can not be processed simultaneously in the process of a kind of composition of process, or existence has processed a kind of composition and has added the quantity of another kind of composition, cause secondary pollution, therefore, the purification of industrial tail gas has comprehensive seizure to be taken, concentrate the integrated method of purification.
Summary of the invention:
Industrial tail gas recycles an invention for systemic circulation technique, is the innovation supplementing and catch pernicious gas in industrial tail gas, reclaim, utilize technology to prior art.The present invention utilizes four de-connectionization all-in-ones the oxysulfide in industrial tail gas, nitrogen oxide, oxycarbide and soot dust to be combined a kind of method removing purification.Water-tail gas heat exchange method is adopted to be utilized by the exhaust-heat absorption in industrial tail gas in invention, adopting the boiling method of purification makes the activated carbon granule in clarifier become the carrier of micro dust particle in ionized gas, and makes it rub improve adsorption efficiency with gas molecule fierceness blowing spreading in boiling; Adopt water smoke ammonia still process process of cleaning to remove the micro dust particle residued in flue gas, and make the ammonia produced become catalyst in subsequent technique therebetween; (the special active carbon with basic functionality adsorption position wherein by surface modification carrys out the acidic molecular in adsorbed gas to adopt stacked formula of the passing through activated-charcoal purifier of more piece to carry out mixing to the deleterious molecular in tail gas and catch, the polarity of adsorbent and adsorbate is increased by the intervention of steam, adsorbent and polar molecule are produced polarize, stimulate nonpolar molecule to produce electro transfer, thus strengthen absorption potential energy); Make desorption liquid in Reusability, become the modification liquid of adsorbing agent carrier by water-soluble infusion process desorption adsorbate; By modification liquid to the modification of adsorbing agent carrier and activation, the catalyst liquid film that has been adsorbent surface apposition while realizing adsorbent reactivation, strengthens absorption property with this; Adopt mixing conversion method to be sent with tail gas mixing wind by active carbon powder, increase contact area and the time of contact of adsorbent and adsorbate, enhance the absorption potential energy of active carbon; In mixing wind send, ammonia is passed into, catalyst carrier is become after making active carbon inhale ammonia, enter after in combining zone make ammonia and carbonic acid, nitric acid, sulfurous acid mixed solution produce combination reaction when active carbon carries amino molecule, gas-liquid is transformed and becomes solid-liquid conversion, increase transformation efficiency, the generation of compound fertilizer is easily realized.Phosphorus pentoxide and potassium peroxide powder are mixed in active carbon, and blowing in process at companion flue gas becomes strong oxidizer, promotes that nitric oxide is to the conversion of nitrogen dioxide with this; The increase of nitrogen oxide activity not only accelerates the process of absorption denitrogenation, and oxidant is participated in the intermediate that chemical combination becomes compound fertilizer; By whirlwind loader mouth to active carbon sprayed coating liquor natrii hypochloritis, make activated carbon surface apposition oxidant liquid film become the catalyst of conversion and nitric oxide adsorption, the physics achieving nitrogen oxide removes; By the absorption of the sodium chloride solution in terminal purifying device to tail gas residue ammonia, carbon dioxide, provide the condition of ammonium salt aqueous carbonate decarburization, and derive sodium acid carbonate product, industrial tail gas is recycled and is able to satisfactorily.The industrial tail gas realized with the present invention recycles systemic circulation, not only various purification techniques can be applied to a flow process, the conversion that removes and collect of nitrogen, sulphur, carbon is joined together, and the high-quality compound fertilizer of final generation and sodium acid carbonate, the heave metals trace elements simultaneously collected by desorption liquid in dust particale adds wherein, achieve harmful substance harmless treatment, and substantially increase the added value of derivative, and the low nitrogen air after purification can be recycled, whole flow process non-secondary pollution thing is discharged.The invention provides a kind of industrial tail gas for this reason and recycle systemic circulation technique, this technique comprises: a, employing water--tail gas heat exchange method is by the exhaust-heat absorption utilization in industrial tail gas; B, adopt boiling the method for purification remove micro dust particle in flue gas; C, employing water smoke ammonia still process process of cleaning remove the micronic dust in flue gas, and make the ammonia produced be tightly held by activated carbon to increase the activity of adsorbent surface basic functionality therebetween; D, the stacked activated carbon and fixed bed clarifier of more piece is adopted to pass through formula purification to active carbon; E, desorption liquid is made to become the modification liquid of adsorbing agent carrier by water-soluble infusion process desorption adsorbate; F, by mixing conversion method make adsorbate desorption liquid and amino molecule chemical combination generate composite fertilizer; G, make conversion of nitric oxide gas become nitrogen dioxide by strong oxidizer phosphorus pentoxide with the oxidation of potassium peroxide, make phosphorus, intermediate that potassium composition becomes composite fertilizer after chemical combination; H, to active carbon sprayed coating liquor natrii hypochloritis, after making its absorbing carbon dioxide, become oxidant; R, by terminal purifying device by the residue sorption enhanced in flue gas.
According to one embodiment of the present invention, ammoniacal liquor is loaded water--gas indirect heat exchanger, to heat to heat exchanger by the waste heat of boiler exhaust gas and make the heat conversion of tail gas, after ammonia is heated, effusion also enters mixing conversion section by ammonia pipeline, and tail gas is by being cooled to less than 150 DEG C after heat exchange.
According to one embodiment of the present invention, send into boiling clarifier by the desuperheated tail gas of heat exchanger under the effect of air-introduced machine, because be subject to the impact of the activated carbon granule resistance that landfill in clarifier, air-supply blast need be greater than 2000pa.Tail gas by supervisor branch out some arms enter respectively blow material boiling cylinder, sectional area due to clarifier terminal ventilating opening equals to be responsible for sectional area, remain in boiling cylinder be greater than 2000pa blow blast, landfill boiling cylinder in activated carbon granule blow material pipe blow out the effect of high pressure draught under dispelled boiling, by the buoyancy ascension blowing wind, fall by self gravitation effect.Activated carbon granule does not stop to rise, and particle and the continuous collision friction of particle produce electrostatic charge, then produce electrostatic field.When dusty gas is ionized by during high-voltage electrostatic field, grit and anion Binding protein tend to anode surface after negative electricity and discharges and deposit, clarifier achieves dedusting function.Because active carbon interface produces electric field, each activated carbon granule surface is also with electric charge, between adsorbate and adsorbent or adsorbent also produce electrostatic attraction or electrostatic repulsion each other, this electrostatic force makes the polarity of polar molecule more strengthen, the electron cloud of nonpolar molecule is departed from no longer overlap with atomic nucleus, therefore make the absorption potential of active carbon increase, clarifier achieves adsorption function.
According to one embodiment of the present invention, under the effect of wind pressurization pressure, mist dust remover air inlet is entered and up through the flue gas of boiling clarifier process, because the sectional area of mist dust remover is much larger than air inlet sectional area, gas enters rear wind speed and slows down, in deduster, water atomization plant is installed in layering from top to bottom, ammoniacal liquor is atomized by atomising device under pressure, flue gas adverse current is passed through, ammoniacal liquor evaporates by the calorific value of flue gas in the process, the constraint that amino molecule departs from hydrone becomes gaseous ammonia, gaseous ammonia is elegant with flue gas, therebetween with the NOx in flue gas, SO2, CO2 contact produces following reaction: the dust particale in 2NH3+NO+NO2+H2O=2NH4NO3.NH3+SO2+H2O=NH4HSO3.NH3+CO2+H2O=NH4HCO3. flue gas is trapped in the process of passing through water smoke, be collected after discharging cleaning system with water.
According to one embodiment of the present invention, from water smoke ammonia still process deduster by further dedusting and the flue gas carrying amino molecule secretly enters the stacked activated-charcoal purifier of more piece the wind of same pressure send.The stacked activated-charcoal purifier of described more piece be a kind ofly to be made up of more piece fixed bed clean room, inside is equipped with by sieve as cover, in-built activated carbon granule, the long-pending adsorption wall equaling clean room's sectional area of length and width, activated carbon granule loose depos-its in adsorption wall, adsorption wall is equaled interval pitch by its thickness and often saves the arrangement of purification indoor vertical, according to quantity and the clarifier number of plies of the size determination adsorption wall of exhaust flow and institute's binding molecule content, stacked clarifier is in the curved arrangement of " S " type.The flue gas carrying amino molecule secretly passes through the adsorption wall arranged in clean room under the blowing being greater than 2000Pa blast, because in body of wall, loose depos-its activated carbon granule, particle solid content forms resistance (space between the resistance=adsorbing agent carrier gross area-particle) to passing through of flue gas, consider coefficient of friction and the unobstructed condition of flue gas of flue gas molecule and adsorbing agent carrier, suitably the sectional area of clean room is amplified.Because adsorption wall is spaced, when fumes cross adsorption wall, moieties in flue gas and adsorbent produce and rub and adsorbed, adsorption density reduces, and often pass through a concentration and reduce once, in crossing process, flue gas volume is shunk, pressure strengthens, adsorbance increases, and enter spacer region flue gas volume and unfold, pressure weakens.In the process, amino molecule is adsorbed and is increased basic functionality adsorption potential to adsorbing agent carrier, because SO2, NOx, CO2 molecule in flue gas all belongs to acidic molecular, acidic molecular and basic functionality have electron affinity, therefore increase the absorption potential of acidic molecular.After acidic molecular is adsorbed in a large number, immunosorbent support surface just covers acidic-group, the increase of acidic functionality, the absorption to amino molecule can be strengthened simultaneously, acidic molecular and amino molecule tiring out stack in adsorbent vestibule, substitute and strengthen mutual attraction potential energy, adsorption rate is increased.
According to one embodiment of the present invention, after the charcoal absorption in boiling clarifier, the stacked clarifier of more piece is saturated, by high-temperature-hot-water by adsorbate desorption, its method is: take desorption, order running respectively to the subsystem of each system, the mode of running comprises: adopt impregnated to the active carbon desorption in boiling clarifier, adopt shower formula to the active carbon desorption in the stacked clarifier adsorption wall of more piece.
Which comprises further: the active carbon crossed by high-temperature-hot-water desorption passes into high-temperature vapor transpiration activation again, removes the impurity in absorption vestibule with this.
According to one embodiment of the present invention, by the high pressure positive blower of more piece stacked clarifier end, gravitation is produced to increase the negative pressure in clarifier to the stacked clarifier of more piece, three grades of cleaned flue gases are blown under the wind-force effect of blower fan the air inlet of mixing converter top cyclone separator, send feeding material device evenly to add to be furnished with the active carbon micro mist of P2O5 and K2O4 oxidant therebetween by wind, and pass into ammonia through ammonia passage, micro mist is with flue gas, ammonia is blowed to cyclone separator, sedimentation under the effect of separator inward eddy gas is also blown into mixing converter from lower curtate pulp cutlet, contact with the liquor natrii hypochloritis be atomized while by pulp cutlet be stained with deposited.The trickle active carbon powder of flue gas entrainment portions is advanced into the annular solar or lunar halo bottom mixing converter from the blowout of cyclone separator air outlet along airduct, mixing converter is entered again by the air inlet of annular solar or lunar halo, flue gas is assembled also slowly up in mixing converter, going upward to converter top flows out also descending along outlet airduct through air outlet, enter sleeve pipe bath appliance under pressure emptying after water-bath after coming downwards to end clarifier.In the process, flue gas blows active carbon micro mist, oxidiser powder, ammonia is in colleague way, adsorber particles is ceaselessly moved under the effect of high-velocity fluid, adsorb with fluid contact, oxidant and moisture are decomposed and discharge oxygen, oxygen contacts with nitric oxide and converts it into nitrogen dioxide, nitrogen dioxide is adsorbed by active carbon micro mist, go together in number of substances one tunnel, collide in contact, absorb, absorption, transform, final solid content falls into the solution of combining zone, bottom, tail gas absorbs after residue emptying through terminal purifying device, various material successively produces following chemical reaction in contact: P2O5+H2O=2HPO3, HPO3+H2O=H3PO4, H3PO4+NH3=NH4H2PO4K2O2+H2O=2KOH+O ↑, KOH+CO2=KHCO3, NaCLO+CO2+H2O=NaHCO3+HCLO, HCLO=light/heat=2HCL+O2 ↑, HCL+NH3=NH4CL.NH3+H2SO3=NH4HSO3NH3+H2CO3=NH4HCO3NH3+HNO3=NH4NO3NaCL+NH3+H2O=NH4CL+NaOH, NaOH+CO2=NaHCO3
Brief Description Of Drawings:
Diagram 1: recycle systemic circulation process chart according to the industrial tail gas that industrial tail gas is recycled described in systemic circulation technique.
Diagram 2: recycle the boiling clarifier schematic diagram described in systemic circulation technique according to industrial tail gas.
Diagram 3: recycle the water smoke ammonia distiller schematic diagram described in systemic circulation technique according to industrial tail gas
Diagram 4: the activated carbon and fixed bed clarifier schematic diagram that the more piece according to industrial tail gas recycling systemic circulation technique is stacked.
Diagram 5: recycle the mixing converter schematic diagram described in systemic circulation technique according to industrial tail gas.
Diagram 6: recycle the terminal purifying device schematic diagram described in systemic circulation technique according to industrial tail gas.
Diagram 7: recycle four de-connectionization one unit schematic diagrames described in systemic circulation technique according to industrial tail gas
Implement mode of the present invention:
According to one embodiment of the present invention, the realization of the object of the invention has been come by following manner.
One, by water--gas indirect heat exchanger carries out heat exchange utilization to flue gas.
Water is loaded water--gas indirect heat exchanger A, ammoniacal liquor is loaded water--gas indirect heat exchanger B, to be heated to heat exchanger by the waste heat of boiler exhaust gas and make the heat conversion of tail gas, produce steam after heat exchanger A is heated, steam is passed into clarifier in order to activate the active carbon after desorption by corresponding pipeline.Produce ammonia after ammoniacal liquor in heat exchanger B is heated, the ammonia of effusion is entered mixing conversion section by pipeline, tail gas is by being cooled to less than 150 DEG C after heat exchange.
Two, the initial purge of flue gas is realized by boiling clarifier.
Desuperheated for heat exchanger tail gas is sent under the effect of air-introduced machine boiling clarifier (diagram 2-1), be enough to blow the activated carbon granule (diagram 2-3) of rising and blowing material boiling cylinder (diagram 2-2) interior landfill and to make flue gas pressures, air-supply blast need be greater than 2000pa.Tail gas is entered respectively by some branch pipe(tube)s (diagram 2-5) that main pipeline (diagram 2-4) branches out and blows material boiling cylinder, due to remain in boiling cylinder be greater than 2000pa blow blast, landfill boiling cylinder in activated carbon granule blow material pipe blow out the effect of high pressure draught under dispelled boiling, by the buoyancy ascension blowing wind, fall by self gravitation effect.Activated carbon granule does not stop to rise, and particle and the continuous collision friction of particle just produce electrostatic charge at interface.Dusty gas is ionized by during high-voltage electrostatic field, grit and anion Binding protein tends to anode surface after negative electricity and discharges and deposit, the grit of deposition blow boil float in collide with the grit constantly deposited and be stained with collection, clarifier achieves dedusting function.Because active carbon interface produces electric field, each activated carbon granule surface is also with electric charge, between adsorbate and adsorbent or adsorbent also produce electrostatic attraction or electrostatic repulsion each other, this electrostatic force makes the polarity of polar molecule more strengthen, the electron cloud of nonpolar molecule is departed from no longer overlap with atomic nucleus, because adsorption molecule polarity strengthens, enhancing corresponding to the electron affinity of adsorbent, the absorption potential of active carbon increases, and clarifier achieves adsorption function.When the molecule in charcoal absorption flue gas is by saturated, the grit of aggregation also reaches certain quantity, then need by necessarily in turn intermittence close arm air-valve (diagram 2-6) and open water tube valve (diagram 2-7), make hot water submergence active carbon, release from leakage fluid dram (diagram 2-7) after dissolving adsorbate.Four, remove smokeshade by water smoke ammonia still process process of cleaning and realize the ammonification of deleterious molecular.
Under the effect of wind pressurization pressure, mist dust remover air inlet (diagram 3-1) is entered and up through the flue gas of boiling clarifier process, slow down to make flue gas flow rate, the sectional area of mist dust remover should be greater than air inlet sectional area, gas is up slowly after entering deduster, in deduster, water atomization plant (diagram 3-2) is installed in layering from top to bottom, ammoniacal liquor is atomized by atomising device under pressure, flue gas adverse current is passed through, ammoniacal liquor evaporates by the calorific value of flue gas in the process, the constraint that amino molecule departs from hydrone becomes gaseous ammonia, gaseous ammonia is elegant with flue gas, therebetween with the NOx in flue gas, SO2, CO2 contact produces following reaction: the dust particale in 2NH3+NO+NO2+H2O=2NH4NO3.NH3+SO2+H2O=NH4HSO3.NH3+CO2+H2O=NH4HCO3. flue gas is trapped in the process of passing through water smoke, be collected after discharging cleaning system with water and send into mixing zone of transformation.
Five, by the activated carbon and fixed bed that more piece is stacked, flue gas molecule is further purified.
From mist dust remover by further dedusting and the flue gas carrying amino molecule secretly enters the stacked activated carbon and fixed bed clarifier of more piece (diagram 4-1) the wind of same pressure send.Flue gas passes through the adsorption wall (diagram 4-2) arranged in clean room under the blowing being greater than 2000Pa blast, because adsorption wall is spaced, in body of wall, loose depos-its activated carbon granule, when fumes cross adsorption wall, moieties in flue gas and adsorbent produce and rub and adsorbed, and adsorption density reduces, and often passes through an adsorption wall, the concentration of flue gas Middle molecule just reduces once, postpones according to this.In crossing process, flue gas volume is shunk, and pressure strengthens, and adsorbance increases.Enter the expansion of spacer region flue gas volume, pressure weakens.In the process, amino molecule is adsorbed, because free ammonia molecule is in alkalescence, has been attached to after adsorbing agent carrier to adsorbing agent carrier apposition amino group, has formed basic functionality.When the surface of solids has acidic site or basic sites, surface is just with positive electricity or negative electricity, and the increase of amino group, make adsorbing agent carrier increase basic functionality adsorption potential, and electronegativity strengthens.Because SO2, NOx, CO2 molecule in flue gas all belongs to acidic molecular, the adsorbent with basic functionality adsorption potential has Preferential adsorption function to acidic molecular, therefore increases the absorption potential of acidic molecular.After acidic molecular is adsorbed in a large number, immunosorbent support surface just covers acidic-group, and form acidic functionality, the generation of acidic functionality, can strengthen the absorption to amino molecule equally.Acidic molecular and amino molecule tiring out stack in adsorbent vestibule, substitute and strengthen mutual attraction potential energy, adsorption efficiency is increased.
Six, to the desorption of adsorbate.
After the acticarbon in boiling clarifier, acticarbon in the stacked fixed bed of more piece are saturated to adsorption molecule absorption, by high-temperature-hot-water by its desorption.In order to the normal operation of not influential system, desorption, order running are respectively taked to the subsystem of each system.The mode of running comprises: adopt impregnated to the active carbon desorption in boiling clarifier, shower formula is adopted to the active carbon desorption in the stacked fixed bed of more piece, its method is: to the active carbon desorption in boiling clarifier be by necessarily in turn intermittence close arm air-valve open water tube valve, make hot water submergence active carbon.Be merogenesis desorption in turn to the active carbon desorption in the stacked fixed bed of more piece, when operating desorption program, merogenesis implements desorption sequentially, and the fixed bed not carrying out desorption runs as usual.After the adsorbate of high-temperature-hot-water to charcoal absorption carries out desorption, in order to get through the vestibule passage in active carbon, then high-temperature vapor transpiration activation is passed into adsorbing agent carrier again, the impurity in absorption vestibule is removed with this, after desorption completes, by light desorption liquid Reusability until concentration squeezes into chemical combination zone of transformation after being raised to 15%.
High-temperature-hot-water dipping desorption and shower desorption, make hydrone enter adsorption hole to dissolve adsorption molecule, because belonged to inanimate matter molecule by SO2, NO2, CO2 molecule adsorbed, all there is the characteristic that energy is water-soluble, H2SO3, H2NO3, H2CO3 is generated respectively, so adopt water-soluble desorption with after water reaction.Active carbon is made up of macropore, mesopore, micropore, and it is macropore that diameter is greater than 50nm, and 2nm-50nm is mesopore, and 0.5nm-2nm is micropore, and being less than 0.5nm is atomic hole, and first water clusters enters in the macropore of active carbon and mesopore and dissolve adsorbate and hauled out.Aperture due to activated carbon capillary is small can not hold water clusters, and water clusters can only resolve into unimolecule by penetrating into, and the unimolecule water of infiltration contacts rapid chemical combination with adsorption molecule, generates another kind of material and volume becomes large.In the process that volume becomes large, produce a kind of expansion thrust towards periphery, run into the inside when this power inwardly stretches and do not dissolved and the drag filling up the adsorption molecule of vestibule, thrust just becomes reaction force, and expansion thrust is larger, and reaction force is just larger.Under the effect of reaction force, the material of generation just slowly exits narrow vestibule and is dissolved further by water clusters, and according to this repeatedly, the adsorbate in micropore is dissolved almost completely desorption.Seven, by the catalysis in flow at high speed of adsorbate, adsorbent, oxidant, catalyst, oxidation, purification.
By the high pressure positive blower (diagram 5-1) of more piece stacked fixed bed clarifier end, gravitation is produced to increase the negative pressure in clarifier to the stacked clarifier of more piece, three grades of cleaned flue gases are blown under the wind-force effect of blower fan the air inlet diagram 5-3 of mixing converter top cyclone separator (diagram 5-2)), feeding material device (diagram 5-4) is sent evenly to add the active carbon micro mist being furnished with P2O5 and K2O4 oxidant by wind therebetween, and pass into ammonia through ammonia passage (diagram 5-5), micro mist is with flue gas, ammonia is blowed to cyclone separator, sedimentation under the effect of separator inward eddy gas is also blown into mixing converter (diagram 5-7) from lower curtate pulp cutlet (diagram 5-6).Contact with the liquor natrii hypochloritis be atomized while by pulp cutlet be stained with deposited, the trickle active carbon powder of flue gas entrainment portions is advanced into the annular solar or lunar halo (diagram 5-9) bottom mixing converter from the blowout of cyclone separator air outlet along airduct (diagram 5-8), then enters mixing converter by the air inlet of annular solar or lunar halo.Flue gas is assembled also slowly up in mixing converter, going upward to converter top flows out also descending along outlet airduct (diagram 5-11) through air outlet (diagram 5-10), enter sleeve pipe bath appliance under pressure emptying after water-bath after coming downwards to end clarifier (diagram 5-12).In the process, flue gas blows active carbon micro mist, oxidiser powder, ammonia in colleague way, adsorber particles is ceaselessly moved under the effect of high-velocity fluid, contact with SO2, NO2, CO2, NH3 of also existing in fluid and adsorb, while absorption, become again the catalyst carrier of NH3 and NO, NO2 chemical combination.Adsorbed the conversion that amino molecule facilitates nitrogen oxide, be stained with applied oxidant fierceness collision in make oxidant and moisture be decomposed and discharge oxygen, oxygen contacts with nitric oxide and converts it into nitrogen dioxide, and nitrogen dioxide is by active carbon rapid adsorption.Number of substances contact in the process of flowing, collision, absorption and sorption, conversion, final solid content falls into the solution of combining zone, bottom (diagram 5-13), and tail gas absorbs after residue emptying through terminal purifying device.
Eight, micro activated carbon particle falls into chemical combination zone of transformation realize mixing conversion as adsorbing agent carrier, catalyst carrier, oxidant load.
The conversion mother liquor that mixing zone of transformation accumulates is the high concentration desorption liquid collected from each cleaning system, is the mixed solution comprising H2SO3, HNO3, H2CO3 composition.Following chemical reaction is produced: P2O5+H2O=2HPO3 when activated carbon supported various material enters wherein, HPO3+H2O=H3PO4, H3PO4+NH3=NH4H2PO4K2O2+H2O=2KOH+O ↑, KOH+CO2=KHCO3, NaCLO+CO2+H2O=NaHCO3+HCLO, HCLO=light/heat=2HCL+O2 ↑, HCL+NH3=NH4CL, NH3+H2SO3=NH4HSO3NH3+H2CO3=NH4HCO3, NH3+HNO3=NH4NO3
Nine, the composition remained in tail gas is removed in terminal purifying device.
Residual fraction ammonia and carbon dioxide in flue gas after boiling purification, water smoke ammonia still process purification, the stacked activated carbon and fixed bed purification of more piece, wind send flowing mixing to transform, in order to realize 100% purification of flue gas, tail gas is passed into bushing terminal clarifier (diagram 6-1).Bushing terminal clarifier is amplified on clarifier top by tail gas terminal airduct sectional area five to ten times (diagram 6-2), the water-bath pipe (diagram 6-3) making tail gas pass through to gather leads to (diagram 6-4) in sodium chloride solution groove, in order to reduce liquid to the resistance of tail gas and enhancing gas-liquid chemical combination efficiency, every root water-bath pipe overcoat sleeve pipe (diagram 6-5), casing inner diameter is greater than water-bath pipe external diameter 5-10mm, and the bottom of sleeve pipe is welded with solution tank and left the pod apertures (illustrating 6-6) being enough to make liquid circulating cycle inside and outside sleeve pipe.Tail gas is passed in sodium chloride solution under the effect of the pressure by each water-bath pipe, the amino molecule residued in tail gas contacts with sodium chloride to produce and reacts as follows: NaCL+NH3+H2O=NH4CL+NaOH, carbon dioxide reaction residual in the NaOH be decomposed out and tail gas generates sodium acid carbonate, that is: NaOH+CO2=NaHCO3.According to the effect determination water-bath pipe of chemical combination and the length of sleeve pipe, chemical combination efficiency is low, and lengthen water-bath pipe and sleeve pipe, chemical combination efficiency is high, shortens water-bath pipe and sleeve pipe.
Comprehensive above-mentioned explanation, industrial tail gas is recycled systemic circulation and is passed through water--and gas indirect heat exchange is to utilize boiler afterheat, dedusting and adsorption cleaning is realized by boiling purification, by water smoke ammonia still process dedusting for follow-up workshop section catalyst is provided while achieve dedusting object, adsorption function and the catalytic effect that formula purification achieves active carbon is substantially passed through by fixed bed, by water soluble method desorption repeatedly, be that adsorbing agent carrier provides modification liquid while completing adsorbate desorption, flowing wind send purification to manifest mixing and absorption more fully, transform, catalysis, the huge efficiency of oxidation, by the absorption of the gas-liquid chemical conversion of routine by active carbon, load, change into solid-liquid to transform, create the shortcut of synthesis technique, terminal purifying instead of the lengthy and tedious process of ammonia-soda process alkaline with simple equipment, whole flow process is by physical absorption, chemical conversion, load carriers catalysis, oxidation is in simple and direct mode, simple equipment easily realizes, and by the harmful substance innoxious use in flue gas, conscientiously achieve industrial tail gas and recycle systemic circulation.
To illustrate in greater detail method of the present invention by following embodiment, but these embodiments are only for illustration of object, and should not be construed as limitation of the present invention.
The parameter designing of the present embodiment simulation thermal power plant emission has made a set of off-gas recovery and has utilized systemic circulation four de-connectionization one unit, realize desulphurization and denitration, decarburization, the de-unification of de-dirt four with streamlined flow line flow path, and regenerant is combined conversion and make compound fertilizer and sodium acid carbonate.This unit technological process is: boiler exhaust gas is imported indirect heat exchanger cooling (diagram, 7-1), the hot water produced in process and steam utilization are in follow-up workshop section, tail gas after cooling blows to electrostatic precipitator (diagram 7-3) by air-introduced machine (diagram 7-2) (device formerly utilized), activated carbon granule in device is boiling-like under the effect of blast pressure, and produce electrostatic, electrostatic charge absorbs the micro dust particle with the charges of different polarity in tail gas, make it adhere to assemble and collected by sack cleaner, at the same time, SO2 in tail gas, NOx, CO2 molecule with boiling blow the active carbon spread clash into contact in by rapid adsorption, tail gas enters water smoke and steams ammonium deduster (diagram 7-4) after boiling purification, the ammonium water atomization with device contacts in reverse passing through, soot dust granule thing in tail gas is dissolved in water smoke and is collected, the CO2 of simultaneously stability trace, SO2, become H2CO3, H2SO3, NH4HCO3 is combined to ammonia gas react again in process, NH4HSO3.The intervention of tail gas after water mist dust-removing due to steam and the generation of ammonia, on the one hand gas molecule polarity is increased, when passing through the stacked activated-charcoal purifier of more piece, (diagram 7-5) strengthens with the contact vigor of adsorbing agent carrier, on the other hand because active carbon is particle modified through overload, the effect of finishing and amino molecule, its special surface alkalinty functional group produces larger affinity to the acidic molecular in gas, enables absorption potential realize maximized extension.The water-soluble dipping desorption of employing after absorption is saturated, make the water-soluble disengaging adsorbing agent carrier of adsorbate, desorption liquid is recycled, until concentration rises to the chemical combination section importing converter after 15%.The flue gas passing through the stacked activated-charcoal purifier of more piece carries oxidiser powder of being mixed with composite fertilizer's intermediate secretly under the blowing of high pressure positive blower (diagram 7-6) and active carbon micro mist (diagram 7-7) is blown into mixing converter (diagram 7-8), appropriate ammonia (diagram 7-9) is passed into while blowing, catalyst carrier is become after making active carbon inhale ammonia betwixt, ammonia and carbonic acid is made after falling into chemical combination section (diagram 7-10), nitric acid, the conversion of sulfurous acid mixed solution becomes solid-liquid and transforms, the chemical combination of derivative composite fertilizer is transformed easily realize, tail gas is discharged after removing remaining NH3 and CO2 output NaHCO3 after terminal purifying (diagram 7-11).
The boiler smoke tolerance used in this embodiment is 5000m
3/ h, wherein SO2:1400mg/m
3, NO:680mg/m
3, NO2:35mg/m
3, CO2:11.6%, O2:5.8%, through four de-connectionization integrally units purify after composition in tail gas respectively: SO2:0, NO:2mg/m
3, NO2:0, CO2:32mg/m
3, substantially close to 100% purification.Detected by branch and obtain following data:
1, the temperature of boiler exhaust gas is down to about 150 DEG C from 300-400 DEG C by indirect heat exchanger, and wherein heat absorption is used in the desorption of adsorbate and the activating and regenerating of adsorbent in subsequent technique.
2, boiling purification section removes the smokeshade of in flue gas 45%, absorption SO2:20%:, NO2:100%, CO2:15%.
3, water mist dust-removing removes smokeshade 45%, SO2:10%, CO2:15%, and the NO of 30% is changed into NO2.
4, mixing catches SO2:50%, CO2:15% in section absorption flue gas, the NO of 30% is changed into NO2, removes the smokeshade of 5%.
5, mixing transforms section absorption SO2:20%: the NO of 100% is changed into NO2 and adsorbing and removing, and absorption and conversion CO2:30%, make the desorption liquid of 90% and ammonia transform.
6, terminal purifying district removes remaining smokeshade, the ammonia of residue 10% and desorption liquid is transformed, removes and transform the CO2 of residue 25%.
Transforming by mixing the compound fertilizer generated has at least five kinds can show composition, and its ratio is about:
NH
4HCO
3∶NH
4HSO
3∶NH
4NO
3∶NH
4PO
4∶KCO
3＝3∶2∶1∶0.2∶0.05。Whole set of installation manufacturing cost is less than conventional cost 1/6, and operating cost is less than 0.1 of the output value, and power consumption is less than 0.02 of generating total capacity.
The industrial tail gas realized with the present invention recycles systemic circulation, combine the multinomial technology of physical absorption and chemical conversion, from physical absorption, by ADSORPTION IN A FIXED BED, thermopnore absorption, cyclone adsorbing partition running with the wind, collocation combines, and creates the maximized efficacy of adsorption of physisorphtion; In chemically transforming, using supporting medium as catalytic carrier, make chemical conversion, be oxidized easily realization fast under the change of phase; From the utilization of product raw material, the harmful substance harmless treatment in flue gas is utilized, and makes it create larger added value; From technological process, desulphurization and denitration, decarburization, de-dirt being integrated, by a disposable realization of flow process, and does not produce secondary pollution, recycling systemic circulation from truly achieving industrial tail gas.
Claims (12)
1. an industrial tail gas recycling systemic circulation technique comprises: a, employing water--tail gas heat exchange method is by the exhaust-heat absorption utilization in industrial tail gas; B, adopt electrostatic precipitation, boiling the method for purification remove micro dust particle in flue gas and boiling flowing in purifying smoke; C, employing water smoke ammonia still process process of cleaning remove the micronic dust in flue gas; D, adopt the stacked activated-charcoal purifier of more piece to pass through formula purification to active carbon, and the ammonia that water smoke ammonia steaming system is produced is tightly held by activated carbon the activity increasing adsorbent surface basic functionality, produces affinity with acidic molecular; E, make desorption liquid become the modification liquid of adsorbing agent carrier by water-soluble infusion process desorption adsorbate, finally become the mother liquor that mixing transforms composite fertilizer; F, by multi-direction type wind send absorption absorption process make adsorbent put adsoption catalysis usefulness substantially to good use in flow at high speed; J, by mixing conversion method make adsorbate desorption liquid and amino molecule chemical combination generate composite fertilizer; G, make conversion of nitric oxide gas become nitrogen dioxide by strong oxidizer phosphorus pentoxide with the oxidation of potassium peroxide, make phosphorus, intermediate that potassium composition becomes composite fertilizer after chemical combination; H, to active carbon sprayed coating liquor natrii hypochloritis, become oxidant after making its absorbing carbon dioxide and output sodium acid carbonate; R, NH3, CO2 sorption enhanced will remained in flue gas by terminal purifying device.
2. a kind of industrial tail gas according to claim 1 recycles systemic circulation technique, adopting water--the exhaust-heat absorption in industrial tail gas utilizes by tail gas heat exchange method, refer to employing water-gas indirect heat exchange gas, wherein by heat exchanger A for generation of steam, heat exchanger B be used for ammonia still process.
3. a kind of industrial tail gas according to claim 1 recycles systemic circulation technique, adopt electrostatic precipitation, boiling the method for purification remove micro dust particle in flue gas and boiling flowing in purifying smoke, described boiling refers to that tail gas is entered respectively by some branch pipe(tube)s that main pipeline branches out and blows material boiling cylinder, owing to remaining certain pressure in boiling cylinder, the adsorbent of landfill in boiling cylinder (comprises wooden base, carbon-based active charcoal particle, NACF and other to gas molecule, there is the material of adsorption function) particle blow material pipe blow out the effect of high pressure draught under dispelled boiling, by the buoyancy ascension blowing wind, fall by self gravitation effect.Described electrostatic precipitation refers to that activated carbon granule does not stop to rise, and particle and the continuous collision friction of particle just produce electrostatic charge at interface.Dusty gas is ionized by during high-voltage electrostatic field, grit and anion Binding protein tends to anode surface after negative electricity and discharges and deposit, the grit of deposition blow boil float in collide with the grit constantly deposited and be stained with collection, clarifier realizes dedusting function.Described boiling purification refers to because adsorbent interface produces electric field, each immunosorbent support surface is also with electric charge, between adsorbate and adsorbent or adsorbent also produce electrostatic attraction or electrostatic repulsion each other, this electrostatic force makes the polarity of polar molecule more strengthen, the electron cloud of nonpolar molecule is departed from no longer overlap with atomic nucleus, because adsorption molecule polarity strengthens, enhancing corresponding to the electron affinity of adsorbent, the absorption potential of adsorbent increases, and clarifier achieves adsorption function.
4. a kind of industrial tail gas according to claim 1 recycles systemic circulation technique, and described boiling clarifier is by blowing material pipe, blowing material manage-style valve, blowing and expect that boiling cylinder, dust collection filter bag, water inlet, dewatering outlet, drain hole, air outlet form.
5. a kind of industrial tail gas according to claim 1 recycles systemic circulation technique, described employing water smoke ammonia still process process of cleaning removes the micronic dust in flue gas, and make the ammonia that produces and flue gas chemical combination therebetween, it is characterized in that: ammoniacal liquor is atomized by atomising device under pressure, flue gas adverse current is passed through, ammoniacal liquor evaporates by the calorific value of flue gas in the process, the constraint that amino molecule departs from hydrone becomes gaseous ammonia, gaseous ammonia is elegant with flue gas, therebetween with the NOx in flue gas, SO2, CO2 contact produces following reaction: the dust particale in 2NH3+NO+NO2+H2O=2NH4NO3.NH3+SO2+H2O=NH4HSO3.NH3+CO2+H2O=NH4HCO3. flue gas is trapped in the process of passing through water smoke, be collected after discharging cleaning system with water.
6. a kind of industrial tail gas according to claim 1 recycles systemic circulation technique, the stacked activated-charcoal purifier of described employing more piece passes through formula purification to active carbon, and the ammonia making water smoke ammonia steaming system produce is tightly held by activated carbon the activity increasing adsorbent surface basic functionality, acidic molecular and amino molecule are tired out stack in adsorbent vestibule, substitute and strengthen mutual attraction potential energy, it is characterized in that: a, the flue gas carrying amino molecule secretly enters the stacked active carbon of more piece (comprising other adsorbents of claim 3 indication) fixed bed clarifier under the wind of certain pressure send, flue gas passes through the adsorption wall arranged in clean room under the blowing of blower fan, because adsorption wall is spaced, in body of wall, loose depos-its absorbent particles, when fumes cross adsorption wall, moieties in flue gas and adsorbent produce and rub and adsorbed, in crossing process, flue gas volume is shunk, pressure strengthens, adsorbance increases, enter spacer region flue gas to releive, pressure weakens.B, flue gas are passing through in adsorption wall process, and amino molecule is adsorbed, because free ammonia molecule is in alkalescence, has been attached to after adsorbing agent carrier to adsorbing agent carrier apposition amino group, make adsorbing agent carrier increase basic functionality adsorption potential, and electronegativity has strengthened.Because SO2, NOx, CO2 molecule in flue gas all belongs to acidic molecular, there is affinity with the adsorbent of basic functionality adsorption potential and acidic molecular, there is Preferential adsorption function, therefore the absorption potential of acidic molecular is increased.After acidic molecular is adsorbed in a large number, immunosorbent support surface just covers acidic-group, and form acidic functionality, the generation of acidic functionality, enhances the absorption to amino molecule equally.Acidic molecular and amino molecule tiring out stack in adsorbent vestibule, substitute and strengthen mutual attraction potential energy, adsorption efficiency is increased.
7. a kind of industrial tail gas according to claim 1 recycles systemic circulation technique, described ammonia by adsorbent to increase the activity of adsorbent surface basic functionality, acidic molecular and amino molecule are tired out stack in adsorbent vestibule, substitute and strengthen mutual attraction potential energy, be equally applicable to adsorbent stream movable bed adsorption cleaning and cyclone adsorbing purification with the wind.
8. a kind of industrial tail gas according to claim 1 recycles systemic circulation technique, desorption liquid is made to become the modification liquid of adsorbing agent carrier by water-soluble infusion process desorption adsorbate, it is characterized in that: impregnated is adopted to the active carbon desorption in boiling clarifier, shower formula is adopted to the active carbon desorption in the stacked fixed bed of more piece.The method adopted is: to the active carbon desorption in boiling clarifier be by necessarily in turn intermittence close arm air-valve open water tube valve, make hot water submergence active carbon.Be merogenesis desorption in turn to the active carbon desorption in the stacked fixed bed of more piece, when operating desorption program, merogenesis implements desorption sequentially, and the fixed bed not carrying out desorption runs as usual.Desorption liquid has become the modification liquid of adsorbing agent carrier in Reusability, and its acid ingredient adds acidic functionality to adsorbent surface, can promote the absorption to amino molecule.After the adsorbate of high-temperature-hot-water to charcoal absorption carries out desorption, in order to get through the vestibule passage in active carbon, then pass into high-temperature vapor transpiration activation to adsorbing agent carrier again, remove the impurity in absorption vestibule with this.
9. a kind of industrial tail gas according to claim 1 recycles systemic circulation technique, the principle of water-soluble desorption is adopted to be to the satisfied adsorbate of absorption in this technique: high-temperature-hot-water dipping desorption and shower desorption, make hydrone enter adsorption hole to dissolve adsorption molecule, because belonged to inanimate matter molecule by SO2, NO2, CO2 molecule adsorbed, all there is the characteristic that energy is water-soluble, H2SO3, H2NO3, H2CO3 is generated respectively, so adopt water-soluble desorption with after water reaction.Its method realized is: first water clusters enters in the macropore of active carbon and mesopore and dissolve adsorbate and hauled out, aperture due to activated carbon capillary is small can not hold water clusters, water clusters can only resolve into unimolecule by penetrating into, the unimolecule water infiltrated contacts rapid chemical combination with adsorption molecule, generates another kind of material and volume becomes large.In the process that volume becomes large, produce a kind of expansion thrust towards periphery, run into the inside when this power inwardly stretches and do not dissolved and the drag filling up the adsorption molecule of vestibule, thrust just becomes reaction force, and expansion thrust is larger, and reaction force is just larger.Under the effect of reaction force, the material of generation just slowly exits narrow vestibule and is dissolved further by water clusters.The scope that the method is suitable for is: all have absorption inanimate matter molecule and have the adsorbent of hydrophobic characteristics.
10. a kind of industrial tail gas according to claim 1 recycles systemic circulation technique, absorption absorption process is sent to make adsorbent put absorption to good use substantially in flow at high speed by multi-direction type wind, catalysis efficiency, its mode realized is: air inlet flue gas being blown under the wind-force effect of blower fan mixing converter top cyclone separator, feeding material device is sent evenly to add to be furnished with P2O5 and K2O4 (to comprise other both to have had oxidation susceptibility and have containing phosphorus by wind therebetween, the oxidant of potassium composition) adsorbent micro mist, and pass into ammonia through ammonia passage, micro mist is with flue gas, ammonia is blowed to cyclone separator, sedimentation under the effect of separator inward eddy gas is also blown into mixing converter from lower curtate pulp cutlet.Contact with the liquor natrii hypochloritis be atomized while by pulp cutlet be stained with deposited, the trickle absorbent powder of flue gas entrainment portions is advanced into the annular solar or lunar halo bottom mixing converter from the blowout of cyclone separator air outlet along airduct, then enters mixing converter by the air inlet of annular solar or lunar halo.Flue gas is assembled also slowly up in mixing converter, goes upward to converter top and flows out through air outlet also descending along outlet airduct, until come downwards to end clarifier.In the process, flue gas blows adsorbent micro mist, oxidiser powder, ammonia in colleague way, adsorber particles is ceaselessly moved under the effect of high-velocity fluid, contact with SO2, NO2, CO2, NH3 of also existing in fluid and adsorb, while absorption, become again the catalyst carrier of NH3 and NO, NO2 chemical combination.Adsorbed the conversion that amino molecule facilitates nitrogen oxide, be stained with applied oxidant fierceness collision in make oxidant and moisture be decomposed and discharge oxygen, oxygen contacts with nitric oxide and converts it into nitrogen dioxide, and nitrogen dioxide is by adsorbent rapid adsorption.Number of substances contact in the process of flowing, collision, absorption and sorption, conversion.
11. a kind of industrial tail gas according to claim 1 recycle systemic circulation technique, described by mixing conversion method make adsorbate desorption liquid and amino molecule chemical combination generate composite fertilizer, its mode realized is: send absorption absorption process to make adsorbent in flow at high speed as adsorbing agent carrier through multi-direction type wind, catalyst carrier, oxidant load has adsorbed SO2, NO2, CO2, NH3, chemical combination zone of transformation is fallen into after the various oxidant of load, because the conversion mother liquor that chemical combination zone of transformation accumulates is the high concentration desorption liquid collected from each cleaning system, comprise H2SO3, HNO3, the mixed solution of H2CO3 composition, following chemical reaction is produced: P2O5+H2O=2HPO3 when activated carbon supported various material enters wherein, HPO3+H2O=H3PO4, H3PO4+NH3=NH4H2PO4
K2O2+H2O=2KOH+O ↑, KOH+CO2=KHCO3 (K2O4+CO2=K2CO3+O3), NaCLO+CO2+H2O=NaHCO3+HCLO, HCLO=light/heat=2HCL+O2 ↑, HCL+NH3=NH4CL, NH3+H2SO3=NH4HSO3, NH3+H2CO3=NH4HCO3, NH3+HNO3=NH4NO3, realizes mixing with this and transforms.
12. a kind of industrial tail gas according to claim 1 recycles systemic circulation technique, the NH3 that described terminal purifying device will remain in flue gas, CO2 sorption enhanced is realized by following method: tail gas is passed into bushing terminal clarifier, the water-bath pipe making tail gas pass through to gather leads in sodium chloride solution groove, tail gas is passed in sodium chloride solution under the effect of the pressure by each water-bath pipe, the amino molecule residued in tail gas contacts with sodium chloride solution and produces following combination reaction: NaCL+NH3+H2O=NH4CL+NaOH, carbon dioxide reaction residual in the NaOH be decomposed out and tail gas generates sodium acid carbonate, that is: NaOH+CO2=NaHCO3.It is characterized in that: a, by tail gas terminal airduct sectional area clarifier top amplify five to ten times.B, in order to reduce liquid to the resistance of tail gas with strengthen gas-liquid chemical combination efficiency, every root water-bath pipe overcoat sleeve pipe, casing inner diameter is greater than water-bath pipe external diameter 5-10mm, and the bottom of sleeve pipe is welded with solution tank and left the pod apertures being enough to make liquid circulating cycle inside and outside sleeve pipe.C, according to the effect determination water-bath pipe of chemical combination and the length of sleeve pipe, chemical combination efficiency is low, and lengthen water-bath pipe and sleeve pipe, chemical combination efficiency is high, shortens water-bath pipe and sleeve pipe.
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| CN112295354A (en) * | 2019-07-30 | 2021-02-02 | 中冶长天国际工程有限责任公司 | Regulation and control method for inhibiting SRG flue gas crystallization |
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