CN104607013B - H-shaped flue gas dust removal desulfurization tower and flue gas desulfurization process - Google Patents
H-shaped flue gas dust removal desulfurization tower and flue gas desulfurization process Download PDFInfo
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Abstract
The present invention discloses an H-shaped flue gas dust removal desulfurization tower and a flue gas desulfurization process. The H-shaped flue gas dust removal desulfurization tower 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 comprises a flue gas inlet, a water membrane assembly first-stage spraying system, a common jujube seed-shaped regular packing assembly, a turbulent scrubber 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 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. According to the H-shaped flue gas dust removal desulfurization tower of the present invention, the common jujube seed-shaped regular packing assembly and the high level potential energy of the turbulent scrubber absorbing liquid can be utilized to concurrently pre-treat the flue gas, and the H-shaped flue gas dust removal desulfurization tower has advantages of high contaminant removal rate, low energy consumption and the like, and is especially for the dust removal desulfurization process of high dust content flue gas.
Description
Technical field
The invention discloses a kind of H type flue-gas dust-removing and desulfurization tower and flue gas desulfurization technique, belong to field of environment protection, be suitable for
Process in 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（Account for the 30% of area）Still expand 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 CaCO3（Limestone）Based on
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 floor space is big, 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.
Content of the invention
For the deficiency of existing Venturi scrubber and turbulent impulse scrubber fume treatment technology, the invention provides a kind of H
Type flue-gas dust-removing and desulfurization tower, using date core shaped structured packing assembly and turbulent impulse scrubber absorbing liquid high potential energy simultaneously to flue gas
Carry out pretreatment, wherein date core shaped structured packing assembly is located at the top of turbulent impulse scrubber.Gas phase is first by one-level spray system
After spraying cooling, again also cross date core shaped structured packing assembly, strong mass transfer reaction and dedusting in here to gas-liquid two-phase there is
Cooling.Turbulent impulse scrubber absorbing liquid during spray, because of the wind-force dissection by flue gas, be dispersed into tiny drop/
Droplet, it is achieved thereby that the mass transfer of spray strengthening again absorbs.
The invention provides a kind of H type flue-gas dust-removing and desulfurization tower is it is characterised in that described desulfurizing tower includes pretreatment unit
And advanced treatment unit, the two constitutes " H " type Double-Tower Structure, and wherein said pretreatment unit includes flue gas from top to bottom and enters
Mouth, one-level spray system I, date core shaped structured packing assembly, one-level spray system II and one-level hold liquid bath, described advanced treating
Unit includes two grades from bottom to top and holds liquid bath, filler assembly, demister and purifying smoke outlet, pretreatment unit and advanced treating
The exhaust gases passes connection by middle part for the unit.
According to the H type flue-gas dust-removing and desulfurization tower of the present invention, wherein said pretreatment unit also include primary cycle pump I,
Primary cycle pump II and primary cycle pipeline；Equally, described advanced treatment unit also includes secondary cycle pump, secondary cycle pipe
Road.Described one-level spray system is located at the top of date core shaped structured packing assembly；Two grades of described spray systems are located at filler
Above or below assembly
According to the H type flue-gas dust-removing and desulfurization tower of the present invention, wherein in described pretreatment unit, in desulfurizing tower tower wall
Top, preferably desulfurizing tower tower wall arrange moisture film assembly with the connecting portion of smoke inlet reducing.Described moisture film assembly can adopt
Any suitable version in this area, such as can arrange endless tube in tower wall surrounding, endless tube arranges the nozzle towards tower wall.
And in the present invention, it is preferred to the connecting portion in tower wall and smoke inlet reducing arranges overflow-type moisture film assembly.Described overflow-type
The structure of 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 unit
Tower diameter, form the uncovered cannelure in bottom lock, a upper end in the connecting portion of tower wall and reducing.Preferably spacious in cannelure
Mouth adopts tooth-shape structure.This cannelure is held liquid bath with one-level and is passed through pipeline, the connection of primary cycle pump.When liquid constantly injects annular
When in groove, liquid constantly can be flowed down along the inwall of desulfurizing tower from the upper edge of tower wall with overflow type, from top to bottom, thus covering whole
Individual wall of reactor.Due to the dry/wet interface in reactor inlet, heat smoke first time touches shower water, can produce height
The acid mist of concentration, so the corrosion condition at dry/wet interface is extremely serious, in the form of being protected using moisture film, can be significantly
Reduce the corrosion condition at dry/wet interface, and the fouling that will be attached on reactor wall rinses at any time, it is to avoid under dirt
Corrosion, improves the antiseptic power of material or the consumption reducing high-grade anti-corrosion material, thus significantly reducing cost.
According to the H type flue-gas dust-removing and desulfurization tower of the present invention, described date core shaped structured packing, fill out including date core shaped is regular
Material, it includes at least one of which, the filler more than preferred two-layer being made up of some date core shaped special pipes in parallel, horizontal positioned
Layer, some in parallel, the date core shaped special pipe of horizontal positioned described in every layer constitutes multiple has collection section, aditus laryngis and dispersion section
Parallel channels.Date core shaped structured packing can be made into one or is divided into some pieces of block combiner to use.
In the H type flue-gas dust-removing and desulfurization tower of the present invention, the section of described date core shaped special pipe（I.e. end face）For date core shaped,
Its top and bottom are acute triangle, and middle part is circular arc, forms the date core shaped of " Rhizoma Anemones Raddeanae middle circle ".Date core shaped special pipe
Middle part be arc surface, be beneficial to the dust containing in gas under hygrometric state, under the brushing of self gravitation and gas phase, pass through
The downward landing of this slip flow regime, thus avoid channel blockage phenomenon.
Two end faces of described date core shaped special pipe can be closed or not close.
In the H type flue-gas dust-removing and desulfurization tower of the present invention, preferably boss is set in the periphery of date core shaped special pipe, described is convex
Platform preferably has certain inclination angle.The boss of special pipe periphery setting, can symmetrical or mal-distribution.
The boss of date core shaped special pipe periphery setting, forms crack with tube wall, after being conducive to wall flow liquid drip to go out aditus laryngis,
Gas phase is blown lower drop and is blown entrance crack, and realizes coalescence in crack, such that it is able to eliminate entrainment, facilitates implementation
Gas-liquid separation.
The lower edge of date core shaped special pipe can also be arranged to zigzag structure, be beneficial to wall flow liquid drip and go out special pipe
Afterwards, form equally distributed continuous stream.
In the H type flue-gas dust-removing and desulfurization tower of the present invention, described date core 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 shrinks）, gas velocity increases, and realizes solution dispersion, and 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 date core shaped special pipe
On the tube wall of side lower part during flow down, and clamp-oned in crack by gas it is achieved that coalescence again further, and finally become continuous
Wire is dripped by the bottom of date core shaped special pipe, thus eliminating entrainment, completes mass transfer reaction.
The H type flue-gas dust-removing and desulfurization tower of the present invention is particularly well-suited to the larger operating mode of dust content in flue gas.
In the H type flue-gas dust-removing and desulfurization tower 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 date core shaped structured packing, its structure with pre-
The structure of the date core shaped structured packing assembly of processing unit is identical, and it is not both this filler assembly preferably only with one layer of date core shaped
Structured packing.
In the H type flue-gas dust-removing and desulfurization tower of the present invention, described two grades of spray systems be located at filler assembly top or under
Side.Flue gas and spray liquid cocurrent or countercurrent contact mass transfer.Spray liquid, will be in date core shaped structured packing group under flue gas blows upwards
The top of part produces the froth bed of the turbulence of certain altitude, and at this moment not only contact surface is big for gas-liquid two-phase, and contact surface alkali liquor
It is continuously available renewal, gas-liquid two-phase fierceness collisional mixing, reach efficient mass transfer reaction, realize mass transport process, carry out depth and take off
Reaction of Salmon-Saxl.Liquid phase falls into two grades in the effect of self gravitation and holds in liquid bath.
In the H type flue-gas dust-removing and desulfurization tower of the present invention, described demister can such as adopt broken line using conventional demister
Type or streamlined demisting assembly.In the present invention, described demister preferred deflector type demister.Deflector type demister includes one
Or several demisting assemblies arranged side by side, each demisting assembly all includes riser and outer tube, and outer tube is arranged on the outside of riser,
And with riser on the same axis；Riser is fixed on tower tray, and the top setting capping plate of riser, in the circle of riser
Some of Zhou Kaiyou seam, has the tangential flow guiding wing the riser stitching near each bar is provided circumferentially about.
Wherein said outer tube is made up of direct tube section and conical cylinder section.The inner surface of outer tube（Inwall）Can also arrange convex
Rise, described projection preferably employs the clapper structure of rectangular cross-section.Wherein, the direction of rotation of hyoplastron preferably with the tangential flow guiding wing
Direction of rotation is contrary.In the present invention, the lower ending opening of described outer tube can also be arranged to zigzag structure, thus advantageously in
The liquid isolated becomes continuous stream to drip from the inwall of outer tube.
In the H type flue-gas dust-removing and desulfurization tower of the present invention, described deflector type demister, by fluid in flow process
Multiple baffling is realized drop and is separated 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 example in floating basket
As iron ore.Holding absorbing liquid in liquid bath due to one-level is in faintly acid, and iron ore can be dissolved and be converted into the manganese with catalysiss
Ion or iron ion.Containing manganese ion or iron ion first order absorption liquid, one-level spray system is delivered to by primary cycle pump I, its spray
Drench liquid to 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
Sulphite or bisulfites, afterwards in dissolved oxygen with there is manganese ion or the iron ion action of catalysiss, oxidized
Being converted into sulfate, thus reducing the COD in waste water, making discharged wastewater met the national standard.
Another technical problem to be solved by this invention is to provide a kind of dusting and desulfurizing technology for smoke, and this technique employs
Flue-gas dust-removing and desulfurization tower recited above.
A kind of dusting and desulfurizing technology for smoke of the present invention, specifically includes herein below：
（1）High-temperature flue gas, after the cooling of one-level spray system chilling, continue cocurrent with absorbing liquid and flow downward, enter Fructus Jujubae
Karyomorphism structured packing assembly, and here carries out cooling, dedusting and the pre- desulfurization to absorption flue gas；
（2）Step（1）The pH value that flue gas after first order absorption is sprayed with turbulent impulse scrubber is that neutral or acid one-level is inhaled
Receive liquid counter current contacting, rapids rushes absorbing liquid during declining, and is dispersed into tiny by the wind-force dissection of gas in tower
Drop/droplet, proceed cooling, dedusting and pre- desulfurization in this process；
（3）The first order absorption liquid entrance one-level absorbing sulfur dioxide holds liquid bath, and is followed by primary cycle pump I, one-level
Ring pump II and primary cycle pipeline recycle；And the flue gas after pretreatment unit absorbs enters advanced treating by exhaust gases passes
Unit；
（4）Under the promotion of upper pressure, the flue gas after pretreatment unit absorption is by by pretreatment unit and depth
Passage between processing unit enters advanced treatment unit, upwardly through filler assembly, and the pH with two grades of spray system injections
Value is in that two grades of absorbing liquids of alkalescence are fully contacted mass transfer in filler assembly, completes 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 dusting and desulfurizing technology for smoke of the present invention, it is respectively provided with pretreatment unit and advanced treatment unit and holds liquid bath,
Define independent Two-way Cycle flue-gas dust-removing and desulfurization system.Hold liquid bath middle setting passage for two, it is pretreatment 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, controls two grades of entrance to hold liquid bath by the pH value that one-level holds liquid bath
Alkali liquor amount.Because this technological process is able to ensure that two grades are held the pH value that liquid bath remains higher, the basicity of two grades of absorbing liquids is higher
Desulfurization degree can be greatly improved.One-level holds liquid bath and level holds the zonal control of liquid bath pH value, both ensure that this fume desulphurization method
High efficiency, may insure the higher utilization rate of desulfurization absorbing liquid again.
In the dusting and desulfurizing technology for smoke of the present invention, flue gas can be from the sulfur-bearing dust-laden high temperature cigarette in various devices
The SO of gas, wherein flue gas2Concentration is 500～5000mg/Nm3, preferably 1000～4000mg/Nm3；Dust concentration 200～800mg/
Nm3, preferably 300～600mg/Nm3.
In the dusting and desulfurizing technology for smoke of the present invention, the operating condition of described flue-gas dust-removing and desulfurization tower is：Operation temperature
For 100～350 DEG C, preferably 150～200 DEG C；Operating pressure is normal pressure to 1MPa；Treatment quantity is 500～200000m3/ h,
Preferably 700～190000 m3/h；Absorbing liquid circulating load is 0.4m3/ h～7m3/ h, preferably 0.5m3/ h～6m3/h.
In the dusting and desulfurizing technology for smoke of the present invention, described absorbing liquid can be NaOH solution, Na2CO3Solution, Mg
(OH)2Solution or lime water Ca (OH)2, the preferred NaOH solution of absorbing liquid that this technique adopts, wherein one-level holds the one-level in liquid bath
The pH value of absorbing liquid, between 6～7, is held for described two grades and is obtained two grades of absorbing liquid pH value in liquid bath between 8～10.
Compared with prior art, the H type flue-gas dust-removing and desulfurization tower of the present invention and its dust-collecting sulfur-removing method have the advantage that：
1st, high-temperature flue gas, after the cooling of one-level spray system chilling, continue cocurrent with absorbing liquid and flow downward, enter Fructus Jujubae
Karyomorphism structured packing assembly, and here carries out cooling, dedusting and the pre- desulfurization to absorption flue gas；The cooling of flue gas chilling and dedusting take off
Sulphuring treatment effect is greatly strengthened.And rush after absorbing liquid contacts again with rapids by the flue gas after structured packing, absorbing liquid
It is dispersed into tiny drop/droplet by the wind-force dissection of gas, the effect of mass transmitting between gas-liquid two-phase is entered
One step strengthening.
2nd, 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 anti-corrosion material
Consumption, thus significantly reduce construction costs.
3rd, 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 value holding liquid bath maintain higher alkali
Degree, thus substantially increase desulfurization degree.One-level holds liquid bath, the zonal control of two grades of pH value holding liquid bath, both ensure that this flue gas
The high efficiency of sulfur method, may insure the higher utilization rate of desulfurization absorbing liquid again.
Brief description
Fig. 1 is a kind of structural representation of present invention flue-gas dust-removing and desulfurization tower.
In Fig. 1：1- moisture film assembly；2- one-level spray system；3- date core shaped structured packing assembly；4- primary cycle pipeline；
5- primary cycle pump I；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- demisting device assembly；14- purifying smoke exports；15- smoke inlet；Outside 16-
Cylinder；17- base plate；18- cylinder；19- turbulent impulse scrubber；20- primary cycle pump II；21- reducing；Edge on 22- cylinder.
Fig. 2 is the structural representation of the date core shaped structured packing assembly of the present invention.
In Fig. 2：31- pull bar；32- date core 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 date core shaped special pipe.
In Fig. 3,321- boss.
Fig. 4 is the structural representation of inverted cone deflector type demister in the present invention.
In Fig. 4：131- tower tray；132- riser；133- inversed conical drum；The 134- tangential flow guiding wing；135- covers plate；136- bar
Seam；137- hyoplastron；138- direct tube section；139- conical cylinder section.
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 H type flue-gas dust-removing and desulfurization tower 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, from top to bottom successively
Level spray system 2, date core shaped structured packing assembly 3, turbulent impulse scrubber 19 and one-level hold liquid bath 6, described advanced treatment unit
Include successively from bottom to top two grades hold liquid bath 7, filler assembly 11, demister 13 and purifying smoke outlet 14, pretreatment unit and
Advanced treatment unit is connected by the exhaust gases passes 8 at middle part.
The H type flue-gas dust-removing and desulfurization tower of the present invention, wherein said pretreatment unit also includes primary cycle pump I 5, one-level
Circulating pump II 20 and primary cycle pipeline 4；Described advanced treatment unit also includes secondary cycle pump 9, secondary cycle pipeline 10
With two grades of spray systems 12.Described one-level spray system 2 is located at the top of date core shaped structured packing assembly.Two grades of spray systems
12 tops being located at filler assembly 11, certain two grades of spray systems 12 can also be located at the lower section of filler assembly 11.
The H type flue-gas dust-removing and desulfurization tower of the present invention, described moisture film assembly 1 can be using any suitable knot in this area
Configuration formula.In Fig. 1, moisture film assembly 1 includes direct tube section 16, base plate 17 and the pretreatment unit of smoke inlet reducing 21 lower end connection
Cylinder 18 on along 22, define a cannelure by direct tube section 16, base plate 17 and cylinder along 22, and pass through primary cycle
Pipeline 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.Wherein excellent
Select and preferably employ tooth bathtub construction along 22 on cylinder.
The H type flue-gas dust-removing and desulfurization tower of the present invention, described turbulent impulse scrubber 19 can be selected for any form of rapids and rushes nozzle.
As shown in Fig. 2 the flue-gas dust-removing and desulfurization tower of the present invention, described date core shaped structured packing assembly is by some horizontal positioned in parallel
Date core shaped special pipe 32, date core shaped special pipe 32 connected by pull bar 31, and is fixed on housing 33.Set on cylinder 18 inwall
Put support lugn 34, for installing fixing date core shaped structured packing.Define many between some parallel date core shaped special pipes 32
Bar parallel channels, constitute gas liquid two-phase flow passage, and described passage includes collection section 35, aditus laryngis 36 and dispersion section 37.As Fig. 4
Shown, date core shaped special pipe bottom both sides tube wall is opened and can have some parallel, boss 321 of protuberance.
As shown in figure 4, the flue-gas dust-removing and desulfurization tower of the present invention, each described demisting device assembly includes riser 132 He
Outer tube 133, outer tube 133 is arranged on the outside of riser 132, and with riser 132 on the same axis, outer tube is by direct tube section
138 and conical cylinder section 139 constituted；Riser 132 is fixed on tower tray 131, the top setting capping plate 135 of riser, is rising
The circumference of trachea has some seams 136, has the tangential flow guiding wing 134 the riser stitching near each bar is provided circumferentially about.Falling
The inner surface of cone cylinder 133（Inwall）On be further opened with hyoplastron 137.
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 I 5 part, reactor is formed with liquid film protection, separately
A part is transported to one-level spray system 2, the first order absorption liquid counter current contacting that high-temperature flue gas are sprayed, reality with one-level spray system 2
Now preliminary chilling cooling.Flue gas after cooling flows downward with by scattered first order absorption liquid continuation cocurrent, enters date core shaped
Structured packing assembly 3, and here completes cooling, dedusting and the pre- desulfurization to absorption flue gas further；Flue gas continues to flow downward,
The first order absorption liquid counter current contacting spraying with turbulent impulse scrubber 19, the first order absorption liquid that turbulent impulse scrubber 19 sprays is by primary cycle
Pump II 20 conveys, and rapids rushes absorbing liquid during declining, and is dispersed into tiny by the wind-force dissection of gas in tower
Drop/droplet, proceeds cooling, dedusting and pre- desulfurization in this process.
The first order absorption liquid absorbing sulfur dioxide falls into one-level and holds liquid bath 6, and passes through primary cycle pump I 5, primary cycle
Pump II 20 and primary cycle pipeline 4 recycle；And the flue gas after pretreatment unit absorption, under the promotion of upper pressure, passes through
Passage 8 between pretreatment unit and advanced treatment unit enters advanced treatment unit.Flue gas after first order absorption upwardly through
Filler assembly 11, and fully connect in filler assembly 11 with two grades of absorbing liquids of two grades of spray system injections of filler assembly 11 top
Tactile mass transfer, two grades of absorbing liquids absorbing sulfur dioxide fall into two grades and hold liquid bath 7, and pass through secondary cycle pump 9 and secondary cycle
Pipeline 10 recycles, and completes final sweetening process.After the purification of filler assembly 11, flue gas passes through demister 13, gas-liquid
After separating, discharge 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 300mg/
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, with NaOH solution as absorbent, gas-liquid counter current contacts；Filler assembly operates liquid gas
Ratio 3：1.
After processing through the inventive method, 50 DEG C of flue-gas temperature, desulfuration efficiency 98%, efficiency of dust collection 99%.
Claims (20)
1. a kind of H type flue-gas dust-removing and desulfurization tower is it is characterised in that described desulfurizing tower includes pretreatment unit and advanced treating list
Unit, the two constitutes " H " type Double-Tower Structure, and wherein said pretreatment unit includes smoke inlet, one-level spray system from top to bottom
System, date core shaped structured packing assembly, turbulent impulse scrubber and one-level hold liquid bath, and described advanced treatment unit includes two from bottom to top
Level holds liquid bath, filler assembly, demister and purifying smoke outlet, the pretreatment unit and advanced treatment unit flue gas by middle part
Channel connection；
Described date core shaped structured packing assembly includes at least two-layer by some date core shaped special pipe structures in parallel, horizontal positioned
The packing layer becoming, every layer of some in parallel, date core shaped special pipe of horizontal positioned constitute multiple has collection section, aditus laryngis and dispersion
The parallel channels of section；In some parallel, protuberance the boss of the periphery of date core shaped special pipe setting.
2. according to the dedusting and desulfurizing tower described in claim 1 it is characterised in that the section of described date core shaped special pipe is Semen Jujubae
Shape, its top and bottom are acute triangle, and middle part is circular arc.
3. according to the dedusting and desulfurizing tower described in claim 1 or 2 it is characterised in that in described date core shaped special pipe bottom
Groove, described groove and boss interval setting are opened up on the tube wall of both sides.
4. according to the dedusting and desulfurizing tower described in claim 1 it is characterised in that in described pretreatment unit, in desulfurizing tower tower
The top setting moisture film assembly of wall.
5. according to the dedusting and desulfurizing tower described in claim 4 it is characterised in that in desulfurizing tower tower wall top and smoke inlet reducing
Connecting portion setting moisture film assembly.
6., according to the dedusting and desulfurizing tower described in claim 4 or 5 it is characterised in that arranging endless tube in tower wall surrounding, endless tube sets
Put the nozzle towards tower wall.
7. according to the dedusting and desulfurizing tower described in claim 5 it is characterised in that described moisture film assembly is overflow-type moisture film group
Part, the structure of overflow-type moisture film assembly is：The lower end of smoke inlet reducing connects one section of straight tube, the locating with diameter greater than pre- of this straight tube
The tower diameter of reason unit, forms the uncovered cannelure in bottom lock, a upper end in tower wall and reducing connecting portion, and this cannelure is same
Level is held liquid bath and is connected by pipeline.
8. according to the dedusting and desulfurizing tower described in claim 7 it is characterised in that the uncovered employing profile of tooth of described cannelure is tied
Structure.
9. according to the dedusting and desulfurizing tower described in claim 1 it is characterised in that the filler assembly in described advanced treatment unit selects
Use structured packing assembly.
10. according to the dedusting and desulfurizing tower described in claim 9 it is characterised in that described structured packing assembly adopts one layer of Fructus Jujubae
Karyomorphism structured packing.
11. according to the dedusting and desulfurizing tower described in claim 1 it is characterised in that described pretreatment unit also includes one-level follows
Ring pump I, primary cycle pump II and primary cycle pipeline；Equally, described advanced treatment unit also include secondary cycle pump, two grades
Circulation line and two grades of spray systems.
12. according to the dedusting and desulfurizing tower described in claim 1 it is characterised in that on described adjacent two-layer date core shaped special pipe
Staggered interval setting down, the parallel channels that is, special pipe of lower floor's filler is formed with upper strata filler align.
13. according to the dedusting and desulfurizing tower described in claim 1 it is characterised in that described demister be deflector type demister, institute
State deflector type demister and include one or several demisting assemblies arranged side by side, each demisting assembly all includes riser and outer tube,
Outer 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；Outer tube is made up of direct tube section and conical cylinder section.
14. put it is characterised in that holding in liquid bath in the one-level of pretreatment unit according to the dedusting and desulfurizing tower described in claim 1
Put floating basket, in floating basket, place oxidation catalyst.
A kind of 15. dusting and desulfurizing technology for smoke are it is characterised in that the method use the arbitrary described H type of claim 1 to 14
Flue-gas dust-removing and desulfurization tower.
16. according to the dusting and desulfurizing technology for smoke described in claim 15 it is characterised in that described technique includes herein below：
（1）High-temperature flue gas enter pretreatment unit, after the cooling of one-level spray system chilling, downward with absorbing liquid continuation cocurrent
Flowing, enters date core shaped structured packing assembly, and here is carried out to cooling, dedusting and the pre- desulfurization absorbing flue gas；
（2）Step（1）The pH value that flue gas after first order absorption is sprayed with turbulent impulse scrubber is neutral or acid first order absorption liquid
Counter current contacting, proceeds cooling, dedusting and pre- desulfurization；
（3）The first order absorption liquid entrance one-level absorbing sulfur dioxide holds liquid bath, and passes through primary cycle pump I, primary cycle pump
II and primary cycle pipeline recycle；
（4）And the flue gas after pretreatment unit absorbs enters advanced treatment unit by exhaust gases passes, upwardly through filler assembly,
And it is fully contacted mass transfer in two grades of absorbing liquids of alkalescence in filler assembly with the pH value of two grades of spray system injections, complete final
Sweetening 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.
17. according to the dusting and desulfurizing technology for smoke described in claim 16 it is characterised in that the SO of described flue gas2Concentration is
500～5000mg/Nm3, dust concentration is 200～800mg/Nm3.
18. according to the dusting and desulfurizing technology for smoke described in claim 16 it is characterised in that described flue-gas dust-removing and desulfurization tower
Operating condition is：Operation temperature is 100～350 DEG C, operating pressure be normal pressure to 1MPa, treatment quantity is 500～
200000m3/ h, absorbing liquid circulating load is 0.4m3/ h～7m3/h.
19. according to the dusting and desulfurizing technology for smoke described in claim 16 it is characterised in that described absorbing liquid be NaOH molten
Liquid, Na2CO3Solution, Mg (OH)2Solution or lime water Ca (OH)2.
20. according to the dusting and desulfurizing technology for smoke described in claim 16 it is characterised in that the pH value of described first order absorption liquid
Between 6～7, the pH value of described two grades of absorbing liquids is between 8～10.
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| CN106215660A (en) * | 2016-08-25 | 2016-12-14 | 灵宝金源晨光有色矿冶有限公司 | SO in a kind of recovery tail gas2system |
| CN107126804A (en) * | 2017-05-17 | 2017-09-05 | 华南理工大学 | A kind of water smoke absorbs chamber device |
| CN109045978B (en) * | 2018-09-07 | 2024-04-12 | 中国恩菲工程技术有限公司 | High-temperature washing deacidification system |
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| CN201949808U (en) * | 2011-01-12 | 2011-08-31 | 江苏新世纪江南环保有限公司 | Flue gas desulfurization device for realizing online oil and dust separation |
| JP2012196611A (en) * | 2011-03-18 | 2012-10-18 | Babcock Hitachi Kk | Flue gas desulfurization apparatus and flue gas desulfurization method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201949808U (en) * | 2011-01-12 | 2011-08-31 | 江苏新世纪江南环保有限公司 | Flue gas desulfurization device for realizing online oil and dust separation |
| JP2012196611A (en) * | 2011-03-18 | 2012-10-18 | Babcock Hitachi Kk | Flue gas desulfurization apparatus and flue gas desulfurization method |
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