CN104607007B - Flue gas dust removal desulfurization reactor and flue gas desulfurization method - Google Patents
Flue gas dust removal desulfurization reactor and flue gas desulfurization method Download PDFInfo
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- CN104607007B CN104607007B CN201310540367.8A CN201310540367A CN104607007B CN 104607007 B CN104607007 B CN 104607007B CN 201310540367 A CN201310540367 A CN 201310540367A CN 104607007 B CN104607007 B CN 104607007B
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- 239000003546 flue gas Substances 0.000 title claims abstract description 84
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 69
- 230000023556 desulfurization Effects 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000000428 dust Substances 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 130
- 230000008569 process Effects 0.000 claims abstract description 31
- 238000012856 packing Methods 0.000 claims abstract description 26
- 238000010521 absorption reaction Methods 0.000 claims abstract description 19
- 238000000746 purification Methods 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 34
- 239000000945 filler Substances 0.000 claims description 28
- 239000007921 spray Substances 0.000 claims description 26
- 239000003517 fume Substances 0.000 claims description 22
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 16
- 239000000779 smoke Substances 0.000 claims description 16
- 230000003009 desulfurizing effect Effects 0.000 claims description 14
- 238000010410 dusting Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 11
- 238000007667 floating Methods 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000001154 acute effect Effects 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000000356 contaminant Substances 0.000 abstract description 2
- 238000002203 pretreatment Methods 0.000 abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 230000000694 effects Effects 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 230000001869 rapid Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- -1 iron ion Chemical class 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000003916 acid precipitation Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000002224 dissection Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- WAEMQWOKJMHJLA-UHFFFAOYSA-N Manganese(2+) Chemical compound [Mn+2] WAEMQWOKJMHJLA-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 4
- 238000004581 coalescence Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 229910001437 manganese ion Inorganic materials 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000005381 potential energy Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
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- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000006276 transfer reaction Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 208000018569 Respiratory Tract disease Diseases 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
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- 210000002345 respiratory system Anatomy 0.000 description 1
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Landscapes
- Treating Waste Gases (AREA)
Abstract
The present invention discloses a flue gas dust removal desulfurization reactor and a flue gas desulfurization method. The reactor of the present invention comprises a pre-treatment unit and a deep treatment unit, wherein the two units form an H-shaped double-tower structure, the pre-treatment unit sequentially comprises a flue gas inlet, a turbulent scrubber, a waterdrop-shaped regular packing assembly and a first-stage liquid holding tank from top to bottom, the deep treatment unit comprises a second-stage liquid holding tank, a packing assembly, a demister assembly and a purified flue gas outlet from bottom to top, and the pre-treatment unit and the deep treatment unit are communicated through the flue gas channel on the middle portion. The reactor of the present invention can achieve functions of one spraying and two-stage absorption/purification, has advantages of high contaminant removal rate, low energy consumption and the like, and is especially suitable for the dust removal desulfurization process of low dust content flue gas.
Description
Technical field
The invention discloses a kind of flue-gas dust-removing and desulfurization reactor and fume desulphurization method, belong to field of environment protection, fit
Process for flue gas and process tail gas dust-removal and desulfurizing, can be widely applied to the fields such as petrochemical industry and environmental protection.
Background technology
In Chinese atmospheric pollution, acid rain and floating dust are topmost pollutions.During the last ten years, due to sulfur dioxide and nitrogen
The discharge capacity of oxide day by day increases, and the problem of acid rain is more and more prominent.China has been be only second to Europe and North America the now
Three big Acid Rain Zones.so2It is the major reason causing China's atmospheric pollution with dust, be also the air dirt of the current priority control of China
Dye thing.China so2For years more than 20,000,000 tons, total emission volumn reaches 25,490,000 tons to total emission volumn within 2005, occupies the world
First place, although the target that China the Eleventh Five-Year Plan period cuts down sulfur dioxide 10% has been carried out, the current Acid Rain Pollution face of China
Long-pending (accounting for the 30% of area) still expands continuous.Every year because of acid rain and so2Pollution causes crops, forest and health
Etc. aspect economic loss more than 100,000,000,000 yuan, sulfur dioxide (SO2) emissions control still can not be ignored.Dust refers to that particle diameter 1～75 is micro-
The particulate matter of rice.Typically produced by broken in commercial production, runs.According to analysis, China is every year by industry and life cellar for storing things
Fire grate enters the dust of air, more than 10,000,000 tons.Dust is easily inhaled into human respiratory tract's system, directly threatens the life of people
Life, the environment being especially in dust pollution can cause multiple cardiovascular, respiratory tract disease etc..
The species that desulfurizing agent is pressed in flue gas desulfurization divides, and can be divided into following five kinds of methods: with caco3Based on (limestone)
Calcium method, the magnesium processes based on mgo, with na2so3Based on sodium method, with nh3Based on ammonia process, based on organic base
Organic alkaline process.Presently, it is recognized that desulfurization dust-removing technique include water film type, fountain, impact type and water-bath type etc..Venturi and rapids
Punching, as strengthening gas-liquid mass transfer (contact) equipment, is widely used in flue-gas dust-removing and desulfurization device, and wherein venturi height about 16m～
19m, and when exhaust gas volumn than larger when, whole desulfurizer is that form encircled by multiple venturi and desulfurizing tower, takes up room and throws
Money all ratios are larger, such as the flue gas desulfurization technique of Norton.Rapid punching needs for liquid phase to raise 6～8m, to produce froth zone, and leads to
Cross the continuous renewal of foam, keep efficient gas-liquid mass transfer effect, but the height of reactor and infrastructure investment also therefore increase
Greatly.
Patent us3894563a all combines realization using venturi with cyclone separator with patent us2012000366a1 and removes
Dirt and gas-liquid separation.The desulfurization dress of patent cn200920247553.1, cn200920200026.5 and cn03142049.4 introduction
Put or technique in, rapids rushes scrubbing tower and is and is separately provided, and takes up room, and investment cost is high.
The technique that patent us4110088 describes a kind of high-temperature flue gas chilling cooling, dedusting and removing water soluble contaminants
And device.927～1038 DEG C of high-temperature flue gas, after two-stage spraying cooling, enter cyclone separator and isolate drop and dust,
Carry out removing pollutant in waste gas through packed tower again, after purification gas enter the deflection plate demister demisting with fin plate, finally
It is injected into aiutage through venturi, when purification gas spray at a high speed through venturi, produce negative pressure, empty around suction venturi
Gas, makes purification gas humidity reduce.This technological process is long, and pressure drop is very big, is provided with blower fan twice in technique, in order to for cigarette
Air stripping supplies power, and energy consumption is larger.
Cn101301574a discloses a kind of multi-stage flue gas desulfurization spray column, including primary desulfurizing scrubber and secondary desulfurization
Spray column, the described outlet of primary desulfurizing scrubber is connected with the entrance of secondary desulfuration spray tower.This multi-stage flue gas take off
Sulfur tower also includes return duct, and this connecting tube is connected between the bottom of primary desulfurizing scrubber and secondary desulfuration spray tower, by
This, absorbing liquid is back to secondary desulfuration spray tower through this return duct, is equivalent to one circulatory pool of two-step desulfurization units shared.This skill
What art was realized has the technical effect that once desulfurization in primary desulfurizing scrubber, secondary desulfuration in secondary desulfuration spray tower, this skill
One circulatory pool of art two-step desulfurization units shared, the level not forming absorbing liquid joins region, and desulfurization degree is not high, and this technology is inhaled
Receive agent and adopt lime stone slurry, the return duct between two-step desulfurization unit only leans on gravity reflux, therefore reflux pipeline is easy to block,
This technology long-term operation reliability is not enough.
Cn2608111y discloses a kind of high-concentration fume desulfurating dust-removing equipment, and this technology is more than 2 sets of desulfurization unit
It is cascaded, with a shell, the desulfurization unit of series connection is covered on together, bottom shares a circulating slot, this technology circulatory pool
More than two sets of desulfurization unit, to process, is only cascaded by the feature not being directed to high-concentration fume, desulfuration efficiency energy
Enough guarantees, but take up an area larger, be not suitable for reserving the use of less region in place.
In prior art, though the cooling/dedusting/desulfurization of high-temperature flue gas adopts two-stage or multi-stage gas-liquid to contact absorption technique,
Reach pollutant removing effect, but every one-level spray-absorption is provided with corresponding equipment for liquid transportation and absorbing liquid atomization sets
Standby, energy consumption is higher.When individually rushing technology using rapids and carrying out chilling cooling and dust-removal and desulfurizing pretreatment to flue gas, it operates liquid gas
Ratio up to 5～8:1, fluid column spray height 6～8m, due to not adding utilization to this fluid column potential energy, cause the pole of desulfurizer energy
Big waste.
Content of the invention
For the deficiency of existing Venturi scrubber and turbulent impulse scrubber fume treatment technology, the invention provides a kind of cigarette
Gas dust-removal and desulfurizing reactor and fume desulphurization method, using high potential energy and the water-drop-shaped structured packing of turbulent impulse scrubber absorbing liquid
Flue gas is carried out with pretreatment simultaneously, wherein turbulent impulse scrubber is located at the top of water-drop-shaped structured packing.Turbulent impulse scrubber absorbing liquid
During declining, because of the wind-force dissection by pretreatment unit flue gas, it is dispersed into tiny drop/droplet, works as gas-liquid
During the biphase structured packing also cross water-drop-shaped, between gas-liquid two-phase there is strengthening effect of mass transmitting in here, it is achieved thereby that once spraying
Drench, strengthening mass transfer absorbs twice, and the energy that equipment for liquid transportation acts on to turbulent impulse scrubber absorbing liquid is fully used, especially
It is applied to the dust-removal and desulfurizing process of the relatively low flue gas of dustiness.
The invention provides a kind of flue-gas dust-removing and desulfurization reactor is it is characterised in that described reactor includes pretreatment list
Unit and advanced treatment unit, the two constitutes " h " shape or " u " shape Double-Tower Structure；Wherein said pretreatment unit wraps from top to bottom
Include smoke inlet, turbulent impulse scrubber, water-drop-shaped structured packing assembly and one-level and hold liquid bath, described advanced treatment unit from lower and
Upper include two grades hold liquid bath, filler assembly, demister and purifying smoke outlet；Described pretreatment unit and advanced treatment unit
By the exhaust gases passes connection at middle part.
According to the flue-gas dust-removing and desulfurization reactor of the present invention, wherein said pretreatment unit also include primary cycle pump and
Primary cycle pipeline；Equally, described advanced treatment unit also includes secondary cycle pump, secondary cycle pipeline and two grades of spray systems
System.Two grades of described spray systems are located above or below filler.
According to the flue-gas dust-removing and desulfurization reactor of the present invention, wherein in described pretreatment unit, in wall of reactor
Top, the preferably connecting portion in wall of reactor and smoke inlet reducing arranges moisture film assembly.Described moisture film assembly is permissible
Using the structure of suitable form any in this area, such as endless tube can be set in wall of reactor surrounding, endless tube is arranged towards
The nozzle of wall.And in the present invention, it is preferred to the connecting portion in wall of reactor and smoke inlet reducing arranges overflow-type moisture film
Assembly.The structure of described overflow-type moisture film assembly is: the lower end of smoke inlet reducing connects one section of straight tube, this direct tube section straight
Footpath is more than the reactor diameter of pretreatment unit, forms bottom lock, a upper end in the connecting portion of wall of reactor and reducing
Uncovered cannelure, preferably in the uncovered employing tooth-shape structure of cannelure.This cannelure is held liquid bath with one-level and is connected by pipeline.
When liquid constantly injects in cannelure, liquid constantly can be flowed down along the inwall of cylinder along the upper edge of cylinder with overflow type,
From top to bottom, thus covering whole wall of reactor.Due to doing/wet interface in reactor inlet, heat smoke contacts for the first time
To shower water, the acid mist of high concentration can be produced, so the corrosion condition at dry/wet interface is extremely serious, by protecting using moisture film
The form of shield, it is possible to reduce the corrosion condition at dry/wet interface, and the fouling that will be attached on reactor wall rinses down at any time
Come, it is to avoid underdeposit corrosion, improve the antiseptic power of material or the consumption reducing high-grade anti-corrosion material, thus significantly
Reduce cost.
According to the flue-gas dust-removing and desulfurization reactor of the present invention, wherein, described turbulent impulse scrubber is made up of nozzle and pipeline.
According to the flue-gas dust-removing and desulfurization reactor of the present invention, described water-drop-shaped structured packing assembly include at least one of which by
The packing area that some water-drop-shaped special pipes in parallel, horizontal positioned are constituted, the described some in parallel, water-drop-shaped of horizontal positioned
Special pipe constitutes multiple parallel channels with collection section, aditus laryngis and dispersion section.Water-drop-shaped structured packing can be made into one or
It is divided into some pieces of block combiner to use.
In the flue-gas dust-removing and desulfurization reactor of the present invention, the section (i.e. end face) of described water-drop-shaped special pipe is water droplet
Shape, its top is circular arc, and bottom is acute triangle, forms the water-drop-shaped of " top big following point ".Water-drop-shaped special pipe
Top is arc surface, is beneficial to the dust containing in gas under hygrometric state, under the brushing of self gravitation and gas phase, by this
The downward landing of slip flow regime, thus avoid channel blockage phenomenon.
Two end faces of described water-drop-shaped special pipe can be closed or not close.
In the flue-gas dust-removing and desulfurization reactor of the present invention, if preferably opening up on the both sides tube wall of water-drop-shaped special pipe bottom
Dry parallel groove, described groove has certain inclination angle.The section of groove can be rectangle, triangle or circular arc, excellent
Select triangle.Described some parallel groove, substantially increases the surface area of unit volume filler, that is, substantially increases
Gas-liquid mass transfer area.
The groove that water-drop-shaped special pipe both sides tube wall opens up, can be symmetrical, and the lower end of symmetrical groove is permissible
Connection is not it is also possible to connect.And the upper end starting point of groove is preferably lower than the phase tangent line of downside tube wall and the circular arc tube wall on both sides.
The groove that water-drop-shaped special pipe bottom both sides tube wall opens up, after being conducive to wall flow liquid drip to go out aditus laryngis, blows lower drop in gas phase
Blown entrance groove, and realized coalescence in groove, such that it is able to eliminate entrainment, realized gas-liquid separation.
In the flue-gas dust-removing and desulfurization reactor of the present invention, described water-drop-shaped special pipe structured packing is by parallel some different
Shape pipe defines the passage with collection section, aditus laryngis and dispersion section.When high-temperature gas, liquid and dust cocurrent enter this packing area
When, initially enter collection section (aisle spare contraction), gas velocity increases, realize solution dispersion, liquid phase specific surface area increases
Greatly, grit attachment is moistening, and scattered atomic drop, under the contention effect of high-speed gas, due to the ductility of water, will attach to
Liquid film is formed on tube wall it is achieved that the coalescence of drop and samming process.When liquid film passes through aditus laryngis, enter one due to gas velocity
Step increases, and liquid film is created with strong compressing and dissection, and liquid film is thinning further, creates twice dispersing effect；
After aditus laryngis, gas velocity declines rapidly, and in the process, a large amount of dust containing in gas is due to the change of gas velocity
Change, realize mud and drip coalescence, dust will be along interface landing, thus realizing dedusting function, and liquid film is the two of water-drop-shaped special pipe
On the tube wall of side lower part during flow down, and clamp-oned in groove it is achieved that coalescence again by gas, and finally become continuous wire by
The bottom drippage of water-drop-shaped special pipe, thus eliminating entrainment, completes mass transfer reaction.
In the flue-gas dust-removing and desulfurization reactor of the present invention, rectangular saddle ring, Bauer are typically selected in the packing area of advanced treatment unit
The random packings such as ring, Raschig ring or structured packing assembly.Present invention preferably employs be water-drop-shaped structured packing, its structure and water
The structure dripping shape structured packing assembly is identical, and it is not both this filler assembly preferably only with one layer of water-drop-shaped structured packing.
In the flue-gas dust-removing and desulfurization reactor of the present invention, described two grades of spray systems be located at filler assembly top or under
Side, flue gas and spray liquid counter current contacting mass transfer, spray liquid is under flue gas blows upwards, certain by producing above filler assembly
The froth bed of the turbulence of height, at this moment not only contact surface is big for gas-liquid two-phase, and contact surface alkali liquor is continuously available renewal, gas-liquid
Biphase fierceness collisional mixing, reaches efficient mass transfer reaction, realizes deep desulfuration.Liquid phase falls into two in the presence of self gravitation
Level is held in liquid bath.
In the flue-gas dust-removing and desulfurization reactor of the present invention, described demister such as can be adopted using conventional demister
Broken line type or streamlined.In the present invention, described demister preferred straight tube shape deflector type demister, wherein said straight tube shape baffling
Formula demister includes several demisting assemblies arranged side by side, and each demisting assembly all includes riser and straight tube, and straight tube is arranged on liter
The outside of trachea, and with riser on the same axis；Riser is fixed on tower tray, the top setting capping plate of riser,
Have some seams in the circumference of riser, have the tangential flow guiding wing the riser stitching near each bar is provided circumferentially about.
In the flue-gas dust-removing and desulfurization reactor of the present invention, described straight tube shape deflector type demister, by fluid in flowing
During multiple baffling realize drop and separate with gas.
The present invention can also hold in the one-level of pretreatment unit and place floating basket in liquid bath, place oxidation catalyst such as in floating basket
Iron ore, holding in liquid bath absorbing liquid due to one-level is in faintly acid, iron ore can be dissolved be converted into have the manganese of catalysiss from
Son or iron ion.Containing manganese ion or iron ion first order absorption liquid, turbulent impulse scrubber is delivered to by primary cycle pump, its spray liquid
Contact with flue gas adverse current, obtain oxygen in flue gas and be transferred in liquid phase.So in first order absorption liquid and flue gas2Reaction generates sulfurous
Hydrochlorate or bisulfites, afterwards in dissolved oxygen with there is manganese ion or the iron ion action of catalysiss, oxidized conversion
For sulfate, thus reducing the cod in waste water, make discharged wastewater met the national standard.
Another technical problem to be solved by this invention is to provide a kind of process for dusting and dsulfurizing fume, the method uses
Flue-gas dust-removing and desulfurization reactor recited above.
A kind of process for dusting and dsulfurizing fume of the present invention, specifically includes herein below:
(1) high-temperature flue gas, after over-quenching cooling, enter pretreatment unit, and the ph value spraying with turbulent impulse scrubber is neutrality
Or the first order absorption liquid counter current contacting of acidity, rapids rushes absorbing liquid during declining, by the wind-force dissection of gas in tower
And it is dispersed into tiny drop/droplet, carry out in this process lowering the temperature, dedusting and pre- desulfurization；
(2) in step (1), the flue gas after rapid punching spray and absorbing liquid continuation cocurrent flow downward, and enter water-drop-shaped rule
Whole filler assembly, and here completes cooling, dedusting and the pre- desulfurization to absorption flue gas further；
(3) the first order absorption liquid entrance one-level absorbing sulfur dioxide holds liquid bath, and is followed by primary cycle pump and one-level
Endless tube road recycles；
(4) under the promotion of upper pressure, the flue gas after pretreatment unit absorbs enters advanced treating by exhaust gases passes
Unit, upwardly through filler assembly, and the ph value sprayed with two grades of spray systems is in two grades of absorbing liquids of alkalescence in filler assembly
It is fully contacted mass transfer, complete final sweetening process.
(5) after the purification of filler assembly, flue gas passes through demisting assembly, after gas-liquid separation, from dust-removal and desulfurizing reactor cigarette
Gas outlet is discharged.
In the process for dusting and dsulfurizing fume of the present invention, pretreatment unit and advanced treatment unit are respectively provided with and hold liquid bath, shape
Become independent Two-way Cycle flue-gas dust-removing and desulfurization system.Hold liquid bath middle setting passage for two, it is pretreatment list that one-level holds liquid bath
Unit provides absorbing liquid, and holding liquid bath for two grades provides absorbing liquid for advanced treatment unit.This technique proposes desulfurization absorbing liquid concentration level
Join theory, original absorbance liquid initially enters two grades and holds liquid bath, then one-level is entered by center-aisle and hold liquid bath, one-level is held liquid bath and is
Final absorbing liquid discharge pond.For guaranteeing the utilization rate of absorbing liquid, entrance two is controlled by the ph value controlling one-level to hold liquid bath
Level holds the alkali liquor amount of liquid bath.Because this technological process is able to ensure that two grades of ph values holding liquid bath are alkalescence, thus can significantly carry
High desulfurization rate.Hold liquid bath, two grades of ph values holding liquid bath by controlling one-level, both ensure that the high efficiency of this fume desulphurization method,
May insure the higher utilization rate of desulfurization absorbing liquid again.
In the process for dusting and dsulfurizing fume of the present invention, flue gas can be from the sulfur-bearing dust-laden high temperature cigarette in various devices
So of gas, wherein flue gas2Concentration is 500～5000mg/nm3, preferably 1000～4000mg/nm3；Dust concentration 70～300mg/
nm3, preferably 100～200mg/nm3.
In the process for dusting and dsulfurizing fume of the present invention, the operating condition of reactor is: operation temperature is 100～350 DEG C, excellent
Select 150～200 DEG C；Operating pressure is normal pressure to 1mpa；Treatment quantity is 500～200000m3/ h, preferably 700～
180000m3/h；Absorbing liquid circulating load is 0.4m3/ h～7m3/ h, preferably 0.5m3/ h～6m3/h.
In the process for dusting and dsulfurizing fume of the present invention, described absorbing liquid can be naoh solution, na2co3Solution, mg
(oh)2Solution, lime water ca (oh)2, the absorbing liquid preferred naoh solution that this technique adopts, wherein one-level holds the one-level in liquid bath
, between 6～7, two grades of described two grades of absorbing liquid ph values held in liquid bath are between 8～10 for the ph value of absorbing liquid.
The present invention can also hold in the one-level of pretreatment unit and place floating basket in liquid bath, place oxidation catalyst such as in floating basket
Iron ore, holding in liquid bath absorbing liquid due to one-level is in faintly acid, iron ore can be dissolved be converted into have the manganese of catalysiss from
Son or iron ion.Containing manganese ion or iron ion first order absorption liquid, turbulent impulse scrubber is delivered to by primary cycle pump, its spray liquid
Contact with flue gas adverse current, obtain oxygen in flue gas and be transferred in liquid phase.So in first order absorption liquid and flue gas2Reaction generates sulfurous
Hydrochlorate or bisulfites, afterwards in dissolved oxygen with there is manganese ion or the iron ion action of catalysiss, oxidized conversion
For sulfate, thus reducing the cod in waste water, make discharged wastewater met the national standard.
Compared with prior art, the flue-gas dust-removing and desulfurization reactor of the present invention and fume desulphurization method have the advantage that
1st, the cooling of flue gas chilling and dust-removal and desulfurizing treatment effect are greatly strengthened.Rapids rushes absorbing liquid in decline process
In, it is dispersed into tiny drop/droplet by the wind-force dissection of gas in tower, in water-drop-shaped structured packing, gas
Effect of mass transmitting between liquid is biphase is further strengthened.
2nd, the present invention can make full use of the high potential energy that rapids rushes absorbing liquid.Invention achieves absorbing liquid once to spray,
The effect absorbing twice, compares existing two-stage or multi-stage flue gas treatment technology, saves and be separately provided venturi slurry circulating pump
Energy consumption.
3rd, the flue-gas dust-removing and desulfurization reactor of the present invention, using moisture film assembly it is achieved that water to pretreatment unit tower wall
Film is protected, and decreases the equipment corrosion of pretreatment unit, improves the antiseptic power of material or reduce high-grade preserving timber
The consumption of matter, thus significantly reduce construction costs.
4th, the process for dusting and dsulfurizing fume of the present invention is it is proposed that desulfurization absorbing liquid concentration level joins theory.By in pretreatment
Unit and advanced treatment unit are respectively provided with and hold liquid bath, define independent Two-way Cycle flue-gas dust-removing and desulfurization system.Held by one-level
The ph value of liquid bath controls two grades of entrance to hold the fresh soda liquid measures of liquid bath, so that it is guaranteed that two grades of ph values holding liquid bath maintain higher alkali
Degree, thus substantially increase flue gas desulphuization rate.One-level holds liquid bath, the zonal control of two grades of ph values holding liquid bath, both ensure that this
The high efficiency of fume desulphurization method, may insure the higher utilization rate of desulfurization absorbing liquid again.
Brief description
Fig. 1 is flue-gas dust-removing and desulfurization structure of reactor schematic diagram of the present invention.
In Fig. 1: 1- moisture film assembly；2- turbulent impulse scrubber；3- water-drop-shaped structured packing assembly；4- primary cycle pipeline；5-
Primary cycle pump；6- one-level holds liquid bath；Bis- grades of 7- holds liquid bath；8- passage；9- secondary cycle pump；10- secondary cycle pipeline；11-
Filler assembly；Bis- grades of spray systems of 12-；13- demister；14- purifying smoke exports；15- smoke inlet；16- outer tube (straight tube)；
17- base plate；18- cylinder；Edge on 19- cylinder；20- reducing.
Fig. 2 is the structural representation of the water-drop-shaped structured packing assembly of the present invention.
In Fig. 2: 31- pull bar；32- water-drop-shaped special pipe；33- housing；34- flange, 35- collection section；36- aditus laryngis；37- divides
Scattered section；18- cylinder.
Fig. 3 is the structural representation of water-drop-shaped special pipe.
321 is groove.
Fig. 4 is the structural representation of straight tube shape deflector type demister in the present invention.
In Fig. 4: 131- tower tray；132- riser；133- straight tube；The 134- tangential flow guiding wing；135- covers plate；136- bar
Seam；137- groove.
Specific embodiment
Further illustrate technology contents and the effect of the present invention with reference to the accompanying drawings and examples.
As shown in figure 1, the flue-gas dust-removing and desulfurization reactor of the present invention includes pretreatment unit and advanced treatment unit, the two
Constitute " h " type Double-Tower Structure, wherein said pretreatment unit includes smoke inlet 15, moisture film assembly 1, rapids from top to bottom successively
Rush scrubber 2, water-drop-shaped structured packing assembly 3 and one-level and hold liquid bath 6；Described advanced treatment unit includes from bottom to top successively
Hold liquid bath 7, filler assembly 11, demisting device assembly 13 and purifying smoke outlet 14, pretreatment unit and advanced treatment unit for two grades
Connected by the exhaust gases passes 8 at middle part.
In the flue-gas dust-removing and desulfurization reactor of the present invention, wherein said pretreatment unit also includes primary cycle pump 5 He
Primary cycle pipeline 4；Described advanced treatment unit also includes secondary cycle pump 9, secondary cycle pipeline 10 and two grades of spray systems
System 12.Two grades of described spray systems 12 are located at the lower section of filler assembly 11, and certainly, two grades of spray systems 12 can also be located at fills out
The top of material assembly 11.
In the flue-gas dust-removing and desulfurization reactor of the present invention, described moisture film assembly 1 can be using any suitable in this area
The structure of form.In Fig. 1, moisture film assembly 1 includes direct tube section 16, base plate 17 and the pretreatment of smoke inlet reducing 20 lower end connection
Along 19 on the cylinder 18 of unit, define a cannelure by direct tube section 16, base plate 17 and cylinder 18 along 19, and pass through one
Level circulation line 4, primary cycle pump 5 are held liquid bath 6 with one-level and are connected.The diameter with diameter greater than cylinder 18 of wherein direct tube section 16.
Preferably uncovered along 19(on cylinder 18) have teeth groove.
The flue-gas dust-removing and desulfurization reactor of the present invention, described turbulent impulse scrubber 2 can be selected for any form of rapids and rushes nozzle.
As shown in Figures 2 and 3, in the flue-gas dust-removing and desulfurization reactor of the present invention, described water-drop-shaped structured packing assembly
Connected by pull bar 31, and be fixed on shell by the water-drop-shaped special pipe 32 of some horizontal positioned in parallel, water-drop-shaped special pipe 32
On body 33.On cylinder 18 inwall, support lugn 34 is set, for installing fixing water-drop-shaped structured packing.Some parallel water-drop-shapeds
Define a plurality of parallel channels between special pipe 32, constitute gas liquid two-phase flow passage, described passage includes collection section 35, larynx
Mouth 36 and dispersion section 37.Water-drop-shaped special pipe bottom both sides tube wall opens up groove.In the flue-gas dust-removing and desulfurization reactor of the present invention,
Obtain demister in described demisting device assembly and include riser 132 and straight tube 133, straight tube 133 is arranged on the outer of riser 132
Side, and with riser 132 on the same axis；Riser 132 is fixed on tower tray 131, the top setting capping plate of riser
135, have some seams 136 in the circumference of riser, have the tangential flow guiding wing the riser stitching near each bar is provided circumferentially about
134.Groove 137 is wherein preferably opened up on the inner surface (inwall) of straight tube 133, described groove can be with the diameter parallel of straight tube
Or it is angled.
During work, high-temperature flue gas by smoke inlet 15, initially enter pretreatment unit, one-level holds liquid after over-quenching cooling
Primary cycle liquid in groove 6 is conveyed to moisture film assembly 1 by primary cycle pump 5 part, and reactor is formed with liquid film protection, another
Part is transported to turbulent impulse scrubber 2, the first order absorption liquid counter current contacting that high-temperature flue gas are sprayed with turbulent impulse scrubber 2, and rapid suction is received
Liquid, during declining, is dispersed into tiny drop/droplet by the wind-force dissection of gas in tower, in this process
In carry out lowering the temperature, dedusting and pre- desulfurization；Flue gas after first order absorption and absorbing liquid continue cocurrent and flow downward, and enter water-drop-shaped rule
Whole filler assembly 3, and here completes cooling, dedusting and the pre- desulfurization to absorption flue gas further；Absorb the one of sulfur dioxide
Level absorbing liquid falls into one-level and holds liquid bath 6, and is recycled by primary cycle pump 5 and primary cycle pipeline 4；And pretreatment unit
Flue gas after absorption, under the promotion of upper pressure, enters depth by the passage 8 between pretreatment unit and advanced treatment unit
Degree processing unit.Flue gas after first order absorption is upwardly through filler assembly 11, and two grades of spray systems with filler assembly 11 top
Two grades of absorbing liquids of system injection are fully contacted mass transfer in filler assembly 11, and two grades of absorbing liquids absorbing sulfur dioxide fall into two grades
Hold liquid bath 7, and recycled by secondary cycle pump 9 and secondary cycle pipeline 10, complete final sweetening process.By filler
After the purification of assembly 11, flue gas passes through demisting assembly 13, after gas-liquid separation, discharges from dust-removal and desulfurizing reactor exhanst gas outlet 14.
Embodiment 1
180 DEG C of certain high-temperature flue-gas, tolerance 160000nm3/ h, so2Concentration is 500mg/nm3, dust concentration 100mg/
nm3
Reactor operating condition: 170 DEG C of operation temperature, operating pressure normal pressure, first order absorption liquid ph value is 6～7, two grades of suctions
Receiving liquid ph value is 8～9.Rapids rushes liquid-gas ratio 6:1, and with naoh solution as absorbent, gas-liquid counter current contacts；Filler assembly operates liquid gas
Compare 3:1.
After processed by the invention, 60 DEG C of flue-gas temperature, desulfuration efficiency 98%, efficiency of dust collection 99%.
Claims (19)
1. a kind of flue-gas dust-removing and desulfurization reactor is it is characterised in that described reactor includes pretreatment unit and advanced treating list
Unit, the two constitutes " h " shape or " u " shape Double-Tower Structure；Wherein said pretreatment unit includes smoke inlet, Tuan Chong from top to bottom
Scrubber, water-drop-shaped structured packing assembly and one-level hold liquid bath, and described advanced treatment unit includes two grades from bottom to top and holds liquid
Groove, filler assembly, demister and purifying smoke outlet；The described pretreatment unit and advanced treatment unit flue gas by middle part
Channel connection；
Described water-drop-shaped structured packing assembly includes at least two-layer by some water-drop-shaped special pipe structures in parallel, horizontal positioned
The filler becoming, described some in parallel, water-drop-shaped special pipes of horizontal positioned constitute multiple has collection section, aditus laryngis and dispersion
The parallel channels of section；Staggered interval shifts to install wherein adjacent two-layer water-drop-shaped special pipe up and down；Described water-drop-shaped abnormity
The section of pipe is water-drop-shaped, and its top is circular arc, and bottom is acute triangle.
2. according to the reactor described in claim 1 it is characterised in that both sides tube wall in described water-drop-shaped special pipe bottom
On open up groove, described groove has certain inclination angle.
3. according to the reactor described in claim 1 it is characterised in that in described pretreatment unit, in wall of reactor
Top arranges moisture film assembly.
4. according to the reactor described in claim 3 it is characterised in that connecting portion in wall of reactor and smoke inlet reducing
Setting moisture film assembly.
5. according to the reactor described in claim 3 or 4 it is characterised in that arranging endless tube in wall of reactor surrounding, on endless tube
Setting is towards the nozzle of wall.
6., according to the reactor described in claim 4 it is characterised in that described moisture film assembly is overflow-type moisture film assembly, overflow
The structure of streaming moisture film assembly is: the lower end of smoke inlet reducing connects one section of straight tube, this direct tube section with diameter greater than pretreatment
The reactor diameter of unit, forms the uncovered cannelure in bottom lock, a upper end in the connecting portion of wall of reactor and reducing,
This cannelure is held liquid bath with one-level and is connected by pipeline.
7. according to the reactor described in claim 6 it is characterised in that the uncovered employing tooth-shape structure of described cannelure.
8. according to the reactor described in claim 1 it is characterised in that the filler assembly in described advanced treatment unit is from rule
Whole filler assembly.
9. according to the reactor described in claim 8 it is characterised in that described structured packing assembly adopts one layer of water-drop-shaped rule
Whole filler.
10. according to the reactor described in claim 1 it is characterised in that described pretreatment unit also include primary cycle pump,
With primary cycle pipeline；Described advanced treatment unit also includes secondary cycle pump, secondary cycle pipeline and two grades of spray systems.
11. according to the reactor described in claim 10 it is characterised in that described two grades of spray systems are located at filler assembly
Above or below.
12. according to the reactor described in claim 1 it is characterised in that described demister selects straight tube shape deflector type demisting
Device；Straight tube shape deflector type demister includes one or several demisting assemblies, and each demisting assembly all includes riser and straight tube,
Straight tube is arranged on the outside of riser, and with riser on the same axis；Riser is fixed on tower tray, the top of riser
Setting capping plate, has some seams in the circumference of riser, near each bar seam riser provided circumferentially about have tangentially lead
The stream wing.
13. float it is characterised in that holding to place in liquid bath in the one-level of pretreatment unit according to the reactor described in claim 1
Basket, places oxidation catalyst in floating basket.
A kind of 14. process for dusting and dsulfurizing fume, the method use the arbitrary described flue-gas dust-removing and desulfurization of claim 1 to 13 anti-
Answer device.
15. according to the process for dusting and dsulfurizing fume described in claim 14 it is characterised in that methods described includes herein below:
(1) high-temperature flue gas, after over-quenching cooling, enter pretreatment unit, and the ph value spraying with turbulent impulse scrubber is neutral or sour
The first order absorption liquid counter current contacting of property, carries out lowering the temperature, dedusting and pre- desulfurization；
(2) in step (1), the flue gas after rapid punching spray continues cocurrent with absorbing liquid and flows downward, and water-drop-shaped is regular fills out for entrance
Material assembly, completes further to cooling, dedusting and the pre- desulfurization absorbing flue gas；
(3) the first order absorption liquid entrance one-level absorbing sulfur dioxide holds liquid bath, and passes through primary cycle pump and primary cycle pipe
Road recycles；
(4) and pretreatment unit absorb after flue gas pass through exhaust gases passes entrance advanced treatment unit, upwardly through filler assembly,
And it is fully contacted mass transfer in two grades of absorbing liquids of alkalescence in filler assembly with ph value, complete deep desulfurization process；
(5) after the purification of filler assembly, flue gas passes through demisting assembly, after gas-liquid separation, goes out from dust-removal and desulfurizing reactor flue gas
Mouth is discharged.
16. according to the process for dusting and dsulfurizing fume described in claim 15 it is characterised in that so in described flue gas2Concentration is
500～5000mg/nm3, dust concentration is 70～300mg/nm3.
17. according to the process for dusting and dsulfurizing fume described in claim 15 it is characterised in that the operating condition of described reactor
For: operation temperature is 100～350 DEG C, and operating pressure is normal pressure to 1mpa, and treatment quantity is 500～200000m3/ h, absorbs
Liquid circulating load is 0.4m3/ h～7m3/h.
18. according to the process for dusting and dsulfurizing fume described in claim 15 it is characterised in that described absorbing liquid be naoh molten
Liquid, na2co3Solution, mg (oh)2Solution or lime water ca (oh)2.
19. according to the process for dusting and dsulfurizing fume described in claim 15 it is characterised in that the ph value of described first order absorption liquid exists
Between 6～7, described two grades of absorbing liquid ph values are between 8～10.
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| CN106669360B (en) * | 2015-11-05 | 2019-01-25 | 中国石油化工股份有限公司大连石油化工研究院 | A kind of flue gas desulfurization and the method and apparatus for producing sulfuric acid |
| CN108619872B (en) * | 2017-03-24 | 2019-09-10 | 中国石油化工股份有限公司 | A kind of fume desulfurizing tower and flue gas desulfurization and wastewater treatment method |
| CN109893916A (en) * | 2017-12-07 | 2019-06-18 | 武汉科技大学 | A kind of free spin line demister of multitube parallel |
| CN111495073A (en) * | 2018-05-23 | 2020-08-07 | 石英权 | Water flow type air dust filter for passenger room of coal mine factory and use method |
| CN112521982A (en) * | 2020-09-28 | 2021-03-19 | 福建省气柜设备安装有限公司 | System and process for recycling coking tail gas by using gas purification system |
| CN116943407A (en) * | 2023-08-09 | 2023-10-27 | 广东万引科技股份有限公司 | An integrated dust removal and desulfurization equipment for brick kiln production |
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| DE3841642A1 (en) * | 1988-12-10 | 1990-06-13 | Adam Muenzenberger Gmbh | Nozzle grating for gas scrubbers, absorbers and the like and column internal composed thereof |
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